WO2009070955A1 - Produits de papier non blanchi fait d'une pâte à base d'herbe et leur procédé de fabrication - Google Patents

Produits de papier non blanchi fait d'une pâte à base d'herbe et leur procédé de fabrication Download PDF

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Publication number
WO2009070955A1
WO2009070955A1 PCT/CN2008/001380 CN2008001380W WO2009070955A1 WO 2009070955 A1 WO2009070955 A1 WO 2009070955A1 CN 2008001380 W CN2008001380 W CN 2008001380W WO 2009070955 A1 WO2009070955 A1 WO 2009070955A1
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WO
WIPO (PCT)
Prior art keywords
pulp
paper
cooking
slurry
natural
Prior art date
Application number
PCT/CN2008/001380
Other languages
English (en)
French (fr)
Inventor
Hongfa Li
Mingxin Song
Jihui Yang
Yanjin Bi
Jinxiang Xu
Original Assignee
Shandong Fuyin Paper & Environmental Protection Technology Co., Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shandong Fuyin Paper & Environmental Protection Technology Co., Ltd filed Critical Shandong Fuyin Paper & Environmental Protection Technology Co., Ltd
Priority to US12/811,655 priority Critical patent/US8303772B2/en
Priority to KR1020107014822A priority patent/KR101410110B1/ko
Priority to CA2731073A priority patent/CA2731073C/en
Priority to JP2010536307A priority patent/JP5585882B2/ja
Priority to EP08783571.6A priority patent/EP2224059B1/en
Publication of WO2009070955A1 publication Critical patent/WO2009070955A1/zh

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Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C5/00Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/12Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00Pulping cellulose-containing materials
    • D21C3/02Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00Pulping cellulose-containing materials
    • D21C3/22Other features of pulping processes
    • D21C3/222Use of compounds accelerating the pulping processes
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10Bleaching ; Apparatus therefor
    • D21C9/147Bleaching ; Apparatus therefor with oxygen or its allotropic modifications

Definitions

  • the invention relates to a natural paper product and a preparation method thereof, and more particularly to an application of a grass-based unbleached pulp as a main raw material in preparing a natural paper product and a natural paper prepared therefrom product.
  • Tissue paper is a commonly used consumer product, but the psychological whiteness and the need for some physical indicators are usually made of pulp based on bleached wood pulp. The prior art gives some preparation of household paper.
  • Technical solutions such as:
  • CN94105089 relates to a high-efficiency pharmaceutical health-care toilet paper using whole wheat straw, and the process of the whole wheat straw high-efficiency medicine health care paper described in the document includes paper sheet making.
  • CN200410026132 discloses a method for utilizing collagen fiber and plant fiber composite tissue paper, which comprises the steps of: bleaching needle (wide) leaf wood pulp and wheat straw pulp to make the slurry concentration reaches 1%-4%, and bleaching needle ( Wide) leaf wood pulp, wheat straw pulp and collagen fiber pulp are mixed, softener is added to the slurry tank; then the prepared slurry is mixed and sent to the paper machine net, and the wet paper is pressed, dried, coiled and processed to obtain the finished product. .
  • the pollution in the paper pulping industry is mainly in the two steps of treatment and discharge of black liquor after cooking and pulp bleaching, in which the contamination of the pulp bleaching step is particularly pronounced.
  • the discharge of traditional chlorine bleaching waste liquid contains not only common water environmental pollution factors such as COD and B0D, but also other special pollutants.
  • chlorinated bleaching, hypochlorite bleaching, etc., chloroform produced by hypochlorite bleaching the waste liquid discharged per 1 ton of bagasse pulp is about 150-250 g, and the waste per ton of wood pulp is bleached.
  • the liquid contains about 700g.
  • the chlorination also contains more than 40 kinds of organic chlorides, among which various chlorophenols are the most, such as dichlorophenols, trichlorophenols, and Dioxins and chlorofurans, many of which are highly toxic.
  • A0X is teratogenic, carcinogenic, and mutagenic.
  • the raw materials of wheat straw or vegetable fiber are used to prepare toilet paper or household paper. Since the prior art pulping method is relatively backward, when the grass is used as a raw material to prepare pulp, the grass raw materials are usually cooked to a very high hardness. Low, such as cooking to hardness of potassium permanganate value 11-14, to achieve such low hardness, the amount of cooking liquid and the long heating and holding time are essential, and high temperature cooking and heat preservation of high concentration chemical liquid Under the circumstances, it will inevitably cause degradation and damage of cellulose and hemicellulose in grass raw materials, and can not maintain the inherent length of the fiber, so the prepared straw is strong. The degree is relatively low, and the quality of the toilet paper and household paper obtained is not high.
  • the bleaching step is carried out, and the bleaching step not only pollutes the environment, but also pollutes the product itself, and produces dioxin and adsorbable organic Carcinogenic substances such as halides cause great harm to users;
  • the prior art preparation method even if wood pulp is used to prepare various papers, substances such as fluorescent whitening agents which are harmful to human body are added. These substances are more or less left in the product and will cause harm to the user's body.
  • the primary object of the present invention is to provide a grass-like natural paper product, which comprises a natural toilet paper, a natural color paper, a natural color paper, a natural copy paper, a natural color lunch box, a natural food packaging paper, and an organic printing paper.
  • the paper product was high in strength, and neither dioxins nor adsorbable organic halides were detected in the test for the detection of harmful substances.
  • a natural paper product prepared by using grass pulp as a raw material wherein the natural paper product has a whiteness of 25-60% ISO, preferably the whiteness is 35-45% ISO, and the grass pulp For the unbleached straw pulp.
  • the undrifted straw pulp of the invention has a crack length of 5.0-7.5 km, a tearing degree of 230-280 mN, a folding endurance of 40-90 times, a whiteness of 25-45% ISO, and a beating degree of 32. -38 ° SR;
  • the unbleached straw pulp has a crack length of 6.5-7.5 km, a tear degree of 250-280 mN, a folding resistance of 65-90 times, and a beating degree of 32-36 ° SR, white The degree is 35-45% ISO.
  • the natural paper products of the present invention include natural toilet paper, natural color paper, natural color paper, natural copy paper, natural food box, natural food wrapping paper and natural printing paper.
  • the natural paper product of the present invention is a color toilet paper
  • the slurry used for the natural toilet paper comprises 70-100% unbleached grass pulp and 0-30% unbleached wood pulp
  • the transverse liquid absorption height of the finished layer is 30-100 mm/lOOs, preferably the transverse aspiration height is 40-100 mm/100 s, more preferably the transverse aspiration height is 50-80 mm/100 s.
  • the natural toilet paper of the present invention has a tensile index of 4-12 Nm/g, preferably the tensile index is 8-12 Nm/g ; and the softness of the plain toilet paper is 120-180 m N, preferably The softness of the plain toilet paper is 120-150 m N; the basis weight of the plain toilet paper is 10.0-18.0 g/m 2 , and the basis weight of the plain toilet paper is preferably 11.0-13.0 g/m 2 .
  • the natural paper product of the present invention is a color paper towel, and the slurry used for the natural color paper towel comprises 70-100% unbleached grass pulp and 0-30% unbleached wood pulp, and the longitudinal wet tensile strength thereof. It is preferably 22-55 N/m, and preferably the longitudinal wet tensile strength is 30-45 N/m.
  • the transverse liquid absorption height of the finished layer of the original color paper towel of the present invention is 30-100 mm/100 s, and preferably the lateral liquid absorbing height of the original color paper towel is 40-100 mm/100 s, more preferably the natural color rubbing
  • the lateral aspiration height of the toilet paper is 50-80 mm/100 s.
  • the natural color paper of the present invention has a softness of 120-180 m N, preferably the softness of the original color paper is 120-150 m N, and the natural color of the paper towel is 23.0-45.0 g/m 2 .
  • the native paper towel has a basis weight of 30.0-40.0 g/m 2 .
  • the natural paper product of the present invention is a color lunch box, wherein the natural color lunch box is prepared by using 70-100% unbleached straw pulp and 0-30% unbleached wood pulp, and the performance parameter thereof conforms to the lunch box GB 18006.1- 1999 A and other products requirements.
  • the natural paper product of the present invention is a color copying paper
  • the slurry used for the natural color copying paper comprises 50-80% of unbleached straw pulp and 20-50% of unbleached wood pulp, and the natural color copying paper
  • the longitudinal and transverse average crack length is 3.2-7.5 km, and it is preferable that the vertical and horizontal average crack length of the natural copy paper is 4.5-7.5 km, and more preferably, the vertical and horizontal average crack length of the natural copy paper is 6.0- 7.5km.
  • the natural copy paper of the present invention has a transverse folding resistance of 60 to 200 times, and preferably the transverse folding resistance is 80 to 185 times.
  • Quantification of the copy paper qualities of the present invention is 60.0-75.0g / m 2, preferably the quantification of 65.0-72.0 g / m 2, more preferably the quantification of 69.0-72.0 g / m 2, said
  • the opacity of the natural copy paper is 82.0 to 98.0%, and preferably the opacity is 90 to 98%.
  • the natural paper product of the present invention is a color food wrapping paper, and the pulp used for the natural food wrapping paper comprises 50-70% unbleached grass pulp and 30-50% unbleached wood pulp, the true color
  • the crack length of the food wrapping paper is 3.2-7.6 km, and it is preferred that the original food wrapping paper has a crack length of 4.5-7.6 km.
  • the color of the original food packaging paper according to the present invention is 45-65 g/m 2 , preferably the quantitative amount is 50-60 g/m 2 , and the transverse folding resistance of the natural food wrapping paper is 90-200 times. Preferably, the transverse folding resistance is 120-200 times.
  • the natural food wrapper of the present invention has a transverse tear of 300-600 m N, and preferably the natural food wrapper has a transverse tear of 400-600 m N.
  • the natural offset printing paper of the present invention has a whiteness of 30-60% ISO, and the paste used for the natural offset printing paper comprises 65-85% of unbleached grass pulp and 15-35% of unbleached wood pulp. .
  • the natural offset printing paper according to the present invention has a crack length of 2.5 to 5.5 km, and preferably has a crack length of 3.5 to 5.5 km.
  • the opaque printing paper of the present invention has an opacity of 82 to 98%, preferably an opacity of 85 to 98%, more preferably 92 to 98%.
  • the natural offset printing paper according to the present invention has a folding resistance of 10-35 times, and preferably the transverse folding resistance is 15-35 times.
  • the natural paper product of the present invention is a color wiping paper, and the slurry used for the natural wiping paper comprises 70-100% unbleached grass pulp and 0-30% unbleached wood pulp, and the natural color wiping paper
  • the longitudinal wet tensile strength is 22-55 N/m, preferably The longitudinal wet tensile strength of the natural wiping paper is 30-45 N/m.
  • the transverse wiping height of the natural wiping paper is 30-100 mm/100 s, preferably the transverse absorbing height of the natural wiping paper is 40-100 mm/100 s, more preferably the lateral suction of the natural wiping paper
  • the liquid height is 50-80 mm/100s.
  • the softness of the natural wiping paper is 120-200 m N, preferably the softness of the natural wiping paper is 120-180 m N; the quantitative amount of the natural wiping paper is 14.0-36.0 g/m2, preferably The true color of the wipe paper is 18-28 g/m2 o
  • the preparation of the unbleached straw pulp of the present invention comprises a cooking and washing step, wherein the cooking comprises: using a grass plant as a raw material to obtain a hardness of potassium permanganate value of 16-28 after cooking, the degree of hydrolysis is 10 -24 ° SR high hardness pulp; preferably, the unbleached grass pulp is cooked with grasses as raw materials to obtain a hardness of potassium permanganate 16-23, a high degree of resolution of 10-24 ° SR Pulp.
  • the preparation of the unfloated grass pulp of the present invention comprises the steps of cooking and oxygen delignification, wherein the oxygen delignification comprises: a high-hardness slurry pump which is obtained after cooking to obtain a potassium permanganate value of 16-28. Sent to the oxygen delignification reaction tower, and add sodium hydroxide and oxygen; the high hardness pulp is subjected to delignification reaction in the oxygen delignification reaction tower to obtain a slurry having a hardness of 10 - 14 potassium permanganate;
  • the oxygen delignification is a single-stage oxygen delignification, which is carried out in an oxygen delignification reaction column;
  • the high-hardness slurry has a temperature of 95-100 ° C at the inlet of the reaction column, and the pressure is 0.9. — 1.2MPa;
  • the temperature at the outlet is 100-105°C, and the pressure is 0.2-0.6MPa.
  • the amount of alkali used in the oxygen delignification treatment is 2-4% of the absolute dry pulp by sodium hydroxide.
  • the amount of oxygen added is 20-40 kg per ton of absolute dry pulp; the reaction time of the high hardness slurry in the reaction tower is 60-90 minutes.
  • the grass pulp of the present invention is prepared by using grasses as raw materials, cooking, washing, oxygen delignification, etc., and the grass plant materials include straw, wheat straw, cotton straw, bagasse A combination of one or more of reeds or arundo.
  • the natural paper product of the invention mainly uses grass pulp as the main raw material, and if necessary, it is matched with a certain unbleached wood pulp or other papermaking pulp, and then obtained after beating and papermaking, since the grass pulp is one High quality unbleached straw pulp with excellent properties such as high strength and high folding resistance, and since the paper product is not bleached, the strength of the fiber is increased by 30% - 50%, and the fiber yield is increased by 10 %, the strength of paper products has been greatly improved, such as long breaks.
  • the natural paper product can also greatly reduce the pollution to the environment, and can avoid the generation of harmful substances and avoid the harm to the human body.
  • Another object of the present invention is to provide a method for preparing a natural paper product.
  • a method of preparing the above-described natural paper product comprising:
  • the grass material is cooked, and then subjected to slurrying, washing, and decontamination, and then subjected to oxygen delignification to obtain the unbleached grass pulp;
  • step (3) mixing the above-mentioned unbleached straw pulp and unbleached wood pulp or other papermaking pulp in step (2) according to the weight fraction of the slurry required for the paper product, so that the slurry is hooked;
  • the above step (3) further comprises adding an auxiliary agent required for the preparation of other paper products other than the fluorescent whitening agent before the mixing process or mixing.
  • the preparation method is a conventional preparation method of various paper products of the prior art.
  • the grass material is subjected to cooking to obtain a high-hardness pulp having a hardness of 16-28 and a beating degree of 10-24 ° SR.
  • the cooking according to the present invention comprises one of ammonium sulfite cooking, strontium-soda cooking, kraft cooking or alkaline sodium cooking:
  • the amount of ammonium sulfite is 9-13% of the amount of the dry raw material
  • the amount of alkali is 9-15% based on the amount of dry raw materials
  • the amount of the dry raw material is 8-11% based on the amount of alkali
  • the amount of sodium hydroxide is 11-15% by weight of the dry raw material, and the amount of sodium sulfite is 2-6% by weight of the dry raw material.
  • the cooking according to the present invention comprises: one of ammonium sulfite cooking, strontium-soda cooking, kraft cooking or alkaline sodium cooking:
  • the ammonium sulfite cooking comprises:
  • the strontium-soda cooking method comprises:
  • the kraft cooking comprises:
  • the alkaline sodium solution cooking comprises:
  • the oxygen delignification of the present invention comprises:
  • the oxygen delignification is a single-stage oxygen delignification, using an oxygen delignification reaction tower;
  • the high-hardness slurry has a temperature of 90-100 ° C at the inlet of the reaction tower, and the pressure is 0.9 - 1.2MPa; the temperature at the outlet is 95-105 ° C, the pressure is 0.2-0.4 MPa;
  • the amount of alkali used in the oxygen delignification treatment is 2-4% of the absolute dry pulp by sodium hydroxide,
  • the amount of oxygen added is 20-40 kg per ton of pulp;
  • the reaction time of the high hardness slurry in the reaction tower is 60-90 minutes.
  • the unbleached straw pulp has a crack length of 5.0-7.5 km, a tear degree of 230-280 mN, a whiteness of 25-45% ISO, a folding resistance of 40-90 times, and a beating degree of 32-38 °.
  • the unbleached straw pulp has a crack length of 6.5-7.5 km, a tear degree of 250-280 mN, a folding resistance of 65-90 times, a beating degree of 32-36° SR, and a whiteness of 35. -45% ISO.
  • the preparation method of the unbleached grass pulp comprises a cooking, washing and oxygen delignification step, wherein the cooking comprises: using a grass plant as a raw material to obtain a hardness of potassium permanganate value 16-28 after cooking.
  • SR high hardness pulp.
  • the preparation of the unbleached straw pulp comprises the steps of cooking, washing and oxygen delignification, wherein the oxygen delignification comprises: a high-hardness slurry pump which is obtained after cooking to obtain a potassium permanganate value of 16-28. Sent to the oxygen delignification reaction tower, and add sodium hydroxide and oxygen; the high hardness pulp is subjected to delignification reaction in the oxygen delignification reaction tower to obtain a slurry having a hardness of 10 - 14 potassium permanganate;
  • the oxygen delignification is a single-stage oxygen delignification, which is carried out in an oxygen delignification reaction column;
  • the high-hardness slurry has a temperature of 95-100 ° C at the inlet of the reaction column, and the pressure is 0.9. — 1.2MPa;
  • the temperature at the outlet is 100-105°C, and the pressure is 0.2-0.6MPa.
  • the amount of alkali used in the oxygen delignification treatment is 2-4% of the absolute dry pulp by sodium hydroxide.
  • the amount of oxygen added is 20-40 kg per ton of absolute dry pulp;
  • the reaction time of the high hardness slurry in the reaction tower is 60-90 minutes.
  • the cooking comprises: one of an ammonium sulfite cooking, a simmering-soda cooking, a kraft cooking or an alkaline sodium cooking:
  • the amount of ammonium sulfite is 9-13% of the amount of the dry raw material
  • the amount of alkali is 9-15% based on the amount of dry raw materials
  • the amount of the dry raw material is 8-11% based on the amount of alkali
  • the amount of sodium hydroxide is 11-15% by weight of the dry raw material, and the amount of sodium sulfite is 2-6% by weight of the dry raw material.
  • the washing includes:
  • the high-hardness pulp having a concentration of 8-15% is introduced from the inlet of the extruder, and the black liquor is extruded under the action of the pressing force to obtain a slurry after the slurry having a concentration of 18-25%.
  • the pulper is preferably a reduced diameter single screw extruder, a double screw extruder or a twin roller extruder;
  • the slurry after the squeezing is carried out with a concentration of 3-6.2 ° Be ' at a temperature of 70-80 ° C and a black liquor of pH 8-8.3 or one or both of the water at a temperature of 70-80 ° C. Washing, the washing is carried out in a vacuum washer, a pressure washer or a horizontal belt washer.
  • the unbleached straw pulp according to the present invention refers to the use of annual plants, including but not limited to wheat straw, straw, cotton straw, bagasse, arundo donax, reed, etc., and the combined raw materials of one or more of them are completely untreated.
  • Any straw obtained by bleaching refers to a straw obtained by using oxygen-containing lignin as a raw material but not obtained by other bleaching.
  • the natural paper product of the present invention refers to a paper product prepared by a conventional method mainly using grass grass obtained by using grass plants as raw material without any bleaching; or mainly using grass plants as A paper product prepared by a conventional method of preparing a straw pulp obtained by oxygen delignification but not subjected to other bleaching.
  • the grass raw materials can be first prepared by using the prior art, that is, the conventional dry and wet preparations are used to remove impurities such as leaves, ears, grains, marrow, grains and the like. This will reduce the pressure on the subsequent process and improve the quality of the wheat straw pulp.
  • the dry and wet preparations can be carried out by conventional conventional equipment such as a lawn mower, a screening machine, a dust remover, a wet scrubber, an oblique spiral dewatering machine, and the like.
  • the moisture-removing grass material after preparation can also be a concentrate, and the moisture of the grass material is deducted from the hay.
  • the length of the grass sheet is generally 15-30.
  • the preparation process of the raw material is well known to those skilled in the art.
  • the dry crushing machine can also be used for dry preparation, including the following steps: (1) The grass raw materials are cut and treated by a hammer crusher to obtain a cut mash. raw material; In this step, the grass raw material is transferred to the hammer crusher, and the hammer crusher comprises a conveying feed section, a crushing and twisting section and a discharge discharging section. The grass raw materials are squeezed, and the grass materials with a circular cross section are crushed to separate the leaves, awns, wheat grains, grains, marrow and other impurities from the straw, and the grass raw materials are from the hammer crusher. The exit is discharged. The discharged grass raw material has a length of 20 to 50 mm.
  • the hammer crusher in the present invention is a hammer mill for use in the prior art.
  • the hammer crusher has a rotational speed of 500-800 rpm, and the grass raw material enters the hammer crusher at a speed of 0.5-1.3 m/s. If the rotational speed is too low or the feed is too fast, some grass raw materials are caused. Can not be completely paralyzed, affecting the penetration of the cooking liquid after the cooking, thereby affecting the quality of the pulp.
  • the grass material has a layer of wax on the outer layer and a layer of pulp inside the rod.
  • the wax can be quickly removed, but due to the inner layer of the rod There is air, so the cooking liquid is difficult to enter.
  • the material after cutting and crushing is subjected to dust removal treatment, because the grass pieces after cutting contain impurities such as dust, sand, grass leaves, grass ears, etc., and most of the impurities are removed by dust removal treatment, so cooking after preparation is performed. In the process, the chemical consumption during cooking can be reduced, and the cooking time is also shortened accordingly.
  • the dust remover used in the dust removal treatment in the present invention may be a dust remover used in the preparation of grass raw materials in the prior art, and includes a roller dust remover, a double cone dust remover and a cyclone dust remover.
  • the dust remover is a cyclone. Dust collector.
  • the air volume is 30000-38000 m 3 /h, and the wind pressure is 210 mm water column. Under such conditions, the dust contained in the grass material can be largely removed, thereby reducing the burden of subsequent cooking.
  • the grass raw materials After the dust removal treatment, the grass raw materials often have coarse grass pieces and broken debris. During the cooking process, some of these impurities are not easily penetrated by the cooking liquid, resulting in undigested materials; Although it reacts with the cooking liquid, the viscosity of the black liquor is increased, which affects the circulation of the cooking liquid, resulting in uneven cooking, causing difficulty in operation, affecting the amount of pulp black liquor extracted and the washing degree of the pulp. Therefore, the screening treatment step is A very important step in the dry preparation of grass raw materials.
  • the cylindrical sieve of the present invention is a cylindrical sieve used in the prior art for dry preparation of grass raw materials.
  • the cylindrical sieve has a rotation speed of 18-29r/min and an inclination angle of 6-12°.
  • the cylindrical sieve of the present invention is a double-layer cylindrical sieve, and the inner sieve of the cylindrical sieve has a square sieve hole side.
  • the length is 30-40mm, and the diameter of the outer sieve screen is 4-6mm.
  • the impurity removal rate of the grass raw material is over 90%, and the general method for removing the dry preparation material has a removal rate of 70%, so that not only the dust in the slurry can be reduced, but also the prepared Clean pulp, high yield, yield ratio
  • the general method is increased by 3-6%, and the production cost is reduced by 2-5% by the method of the present invention.
  • the raw material may be immersed before cooking, the impregnating liquid is impregnated with the wheat straw raw material, the liquid ratio is up to 1:2-4, and the liquid impregnating and mixing is carried out in the spiral impregnator at 85 ° C or more under normal pressure. More than a minute, in which it is mixed for 10-40 minutes at 85-95 °C. In this way, the impregnating solution is sufficiently contacted with the raw material of the wheat straw to completely impregnate the raw material of the wheat straw.
  • the immersion liquid may be a certain concentration of an alkali solution, for example, an alkali solution having a base amount of 4% by dry weight of sodium hydroxide, or a mixture of the above alkali solution and black liquor, and black used.
  • concentration of the liquid is 11-14 ° Be ' (20 °C).
  • the raw material is immersed to recycle the black liquor temperature and residual alkali, reducing energy and resource consumption. Due to the pre-treatment of the raw material, the hetero cells and hemicellulose are removed during the heat treatment. The lignin-based black liquor is separated and discharged, ready for the next cooking.
  • the process of impregnating the raw material is a pretreatment process, and its main purpose is to facilitate the reaction of delignification in the subsequent cooking process.
  • Grass pulping is the use of cooking liquor to properly remove lignin from grassy materials, retaining cellulose and hemicellulose as much as possible to facilitate papermaking.
  • the lignin, cellulose, hemicellulose and other components in the raw materials undergo certain chemical changes, which are subject to various degrees of degradation and damage. Therefore, it is necessary to study the raw materials in the cooking process.
  • the changing rules are to develop appropriate cooking conditions.
  • a high hardness pulp is obtained, and the hardness of the high hardness pulp is a potassium permanganate value of 16-28, which corresponds to a Kappa number of 24-50, and a beating degree of 10-24 ° SR ;
  • the hardness of the high-hardness pulp is 18-27 for the potassium permanganate value equivalent to the Kappa price of 29-48;
  • the hardness of the high-hardness pulp is most preferably the potassium permanganate value of 20-25, which corresponds to the Kappa price of 34-42.
  • the high-hardness pulp prepared by the cooking in the present invention is used as a raw material for preparing the unbleached pulp.
  • the cooking and holding time is long, the cooking temperature is high, the cooking liquid amount is large, and the holding time is long.
  • the amount of the cooking liquid is small, and the cooking and holding time is greatly shortened.
  • the yield of the high-hardness pulp obtained by the cooking method is 58 to 68%.
  • the obtained high-hardness slurry is diluted with a certain pressure and then discharged into a discharge pot at a pressure of 0.75 MPa.
  • the diluent may be the black liquor used in the aforementioned immersion treatment.
  • the concentration of the high-hardness slurry in the spray pot is -8-15%
  • the hardness is the potassium permanganate value of 16-28, which is equivalent to the Kappa price of 26-50
  • the transfer pump is passed between the discharge pot and the screw extruder. Connected, the transfer pump delivers the high-hardness slurry from the spray pot to the inlet of the screw press.
  • the high-hardness pulp enters from the inlet of the screw extruder.
  • the high-hardness slurry is sent out from the outlet of the extruder, and the concentration of the slurry sent is increased from 8.5 to 20-28%.
  • High concentration of high hardness pulp with a temperature of 70-80 °C.
  • the selected pulping machine is a screw extruder for extracting black liquor in the prior art, preferably a single-screw extruder or a double-screw extruder and a double-roller extruder with variable pitch.
  • the temperature will rise rapidly due to the large squeezing force during the squeezing process, which will cause the fibers to separate, separate, smash, crush, and the primary wall is destroyed.
  • the energy causes a large stress inside the fiber, and the reaction performance of the high-hardness pulp is greatly improved.
  • the fibers are fibrillated, and the impurities of the epidermis and interfibers are dissolved in the cooking black liquor, and the fiber purity is greatly improved by discharging through the liquid discharge tank. Some of the ash and impurities in the black liquor are also discharged with the black liquor, which is fully prepared for the next step.
  • the most preferred extruder in the present invention is a screw-reducing extruder, which uses a variable-squeezing extruder to make the slurry dewatered in and out of the compressed slurry layer in a slowly decreasing space.
  • the single helix variable diameter extruder used in the present invention does not change the degree of entanglement of the high hardness pulp after the high hardness pulp is squeezed.
  • a two-roller extruder can also be used.
  • the use of a twin-roller can also minimize fiber damage as well as a single-screw extruder, and because of the twin-roller
  • the black liquor extraction rate is high, so the water consumption in the subsequent washing process is greatly reduced, and the water consumption is much less than that of the single screw extruder.
  • the concentration of the high-hardness pulp reaches 20% or more, and the highest can reach 25%.
  • the high-hardness pulp obtained after the retort or the high-concentration high-hardness pulp obtained after the squeezing is generally diluted with a concentration of 11-14 ° Be '
  • the black liquor at (20 ° C) is diluted to a concentration of 2.5-3.5%, and then screened by a prior art screening method such as a sieve screening method, and the loss in the screening is 0.2-0.5%.
  • the washing is carried out next, and washing can be carried out using a vacuum washer or a pressure washer of the prior art.
  • the purpose of using a vacuum washer is to more easily form a pressure difference between the inside and outside of the fiber cells during the washing process, which is more advantageous for achieving a high degree of cleansing during the washing process.
  • the number of washings may be one time or two or three times.
  • the concentration of the pulp is between 9 and 11%, and the slurry can be sent to the deconstructing machine through the screw conveyor for dissolving treatment, and the degree of beating of the pulp after treatment is 26-28°.
  • SR wet weight 1.5-1.7g, temperature 65-70 °C.
  • the deconstruction machine is an existing deconstruction device, such as a high frequency decomposer, a disc grinder or a fiber separator. By disintegrating, the fibers can be cleaved, and the lignin between the fibers and the fibers is exposed, which facilitates the subsequent oxygen delignification step.
  • the high-hardness pulp obtained after the cooking or the slurry obtained after the disintegration or the slurry obtained after the washing is subjected to oxygen delignification, wherein the oxygen delignification is: the amount of the alkali is determined by the amount of the dry pulp. 2-4%, oxygen is added in an amount of 20-40 kg per ton of pulp for 60-90 minutes.
  • the hardness k value (potassium permanganate value) of the slurry is lowered to 11-13, which is equivalent to the Kappa price of 12.5-17, and the beating degree is 32-36° SR.
  • the oxygen delignification treatment of the present invention is a single-stage oxygen delignification, using an oxygen delignification reaction tower, the temperature of the high-hardness pulp at the inlet of the reaction tower is 90-100 ° C, and the pressure is 0.9- 1.2MPa, the temperature at the outlet is 95-105 °C, and the pressure is 0.2-0.4MPa.
  • Single-stage oxygen delignification is mainly for Further ensuring the strength of the pulp, the single-stage oxygen delignification has less degradation of cellulose than the multi-stage oxygen delignification.
  • the preferred process parameters of the single-stage oxygen delignification of the present invention are generally lower in temperature and relatively longer in duration, mainly for a milder delignification reaction and to avoid degradation of cellulose as much as possible.
  • the high hardness pulp of the present invention has a concentration of from 8 to 18% prior to the oxygen delignification treatment.
  • Oxygen delignification is carried out under medium concentration conditions.
  • the main advantages of concentrated oxygen delignification are: less investment; due to the success of medium-concentration mixing and pumping technology, slurry processing is much easier than high concentration; low slurry concentration, less corrosion of equipment, no The danger of burning in oxygen.
  • the unbleached straw pulp obtained through the above steps has a crack length of 5.0-7.5km, a tearing degree of 230-280mN, a whiteness of 25-45% ISO, a folding resistance of 40-90 times, and a beating degree of 32-38 ° SR.
  • the unbleached pulp can avoid the possible harm to the human body by the chemicals used in the bleaching process, so that the prepared natural paper products cannot contain carcinogens such as dioxins and adsorbable organic halides, so hurt.
  • the unbleached grass pulp can reduce the influence of the bleaching process on the length of cracking, the degree of tearing and the number of folding resistance, and because of the different preparation methods, the performance of the prepared straw pulp is excellent, and the paper product can be greatly improved. quality.
  • the fluorescent whitening agent is not required to be added, so that the prepared paper product is not subject to secondary pollution of such materials, and the original properties of the paper product are maintained. , will not cause harm to the body.
  • the strength and various properties of the prepared straw pulp are greatly high, so that it can be mixed with a small amount of wood pulp or other papermaking pulp.
  • the paper product can be prepared by mixing, and can even be directly prepared from grass pulp to produce a high quality paper product.
  • the wheat straw raw material is prepared into a steaming ball by using a hammer crusher, and the cooking liquid is added to the steaming ball.
  • the ammonium sulfite is added in an amount of 9% of the dry raw material, the liquid ratio is 1:3, and the first heating is performed.
  • the temperature was raised to 110 ° C, the temperature was kept at this temperature for 30 minutes, the gas was slightly released for 25 minutes, and the second heating was heated for 60 minutes to a temperature of 168 ° C for 90 minutes.
  • the hardness of the high-hardness pulp obtained after cooking is 22 equivalent to the Kappa price of 35.5, the degree of beating is 11.6 ° SR, diluted with dilute black liquor to a concentration of 2.5%, and then subjected to prior art screening methods such as sieve screening. For screening, the loss in the screening was 0.5%. It is then washed by a prior art vacuum washer. After washing, a high-durability slurry having a concentration of 10% was obtained and transferred to a medium-concentration slurry tube. It is sent to the oxygen delignification reaction tower through a medium-concentration pump.
  • the slurry is mixed with the added oxygen of 20 kg per ton of slurry and the alkali solution of 4% of sodium hydroxide by sodium hydroxide before entering the reaction tower, and the slurry is heated by steam in the pipeline. Warm up. After the slurry is thoroughly mixed in the mixer, it enters the oxygen delignification reaction tower.
  • the protective agent is magnesium sulfate, and the amount is 1% of the absolute dry pulp.
  • the inlet temperature is 95 ° C
  • the pressure is 0.9 Mpa
  • the residence time is 75 minutes.
  • the slurry was able to carry out a sufficient delignification reaction with a temperature of 100 ° C at the top of the column and a pressure of 0.3 MPa.
  • the unbleached straw pulp has a crack length of 5.0 km, a folding resistance of 40 times, a tearing degree of 220 mN, a whiteness of 40% ISO, and a beating degree of 34° SR.
  • the above-mentioned unbleached straw pulp was beaten, and the above-mentioned unbleached straw pulp was beaten, the degree of beating was 33° SR, the wet weight of beating was 2.1 g, and the degree of beating of unbleached wood pulp was 20 ° SR, and the wet weight of beating was 12 g.
  • the slurry obtained by slurring 65% by weight of the above-mentioned unbleached grass pulp and 35% of the unbleached wood pulp was mixed and then formed into a paper to obtain the above-mentioned natural offset printing paper.
  • the natural offset printing paper has a basis weight of 69.0 g/m2, an opacity of 85%, a crack length of 3.9 km, a whiteness of 49% ISO, a transverse folding resistance of 19 times, and a tearing degree of 258 mN.
  • the straw raw material is dry-prepared by the hammer crusher, it is charged into the batch type spherical digester, and the cooking liquid is added to the batch type spherical digester, and the ammonium sulfite is added in an amount of 13% of the absolute dry material amount.
  • the ratio is 1:4, the first heating is heated to 120 ° C, the temperature is kept at this temperature for 40 minutes, the small steam is released for 25 minutes, and the second heating is heated for 60 minutes to a temperature of 168 ° C, and the temperature is maintained for 90 minutes.
  • the hardness of the high-hardness pulp obtained after cooking is 16 equivalent to the Kappa number 23, the degree of beating is 23.4° SR, diluted with dilute black liquor to a concentration of 2.5%, and subjected to prior art screening methods such as sieve screening. For screening, the loss in the screening was 0.2%. It is then washed by a prior art vacuum washer. After washing, a high-durability slurry having a concentration of 10% was obtained, and then the slurry was heated to 70 ° C by a screw conveyor and transferred to a medium-thick slurry tube.
  • the slurry is firstly subjected to quenching and tempering treatment to remove the air in the slurry to be fluidized, and then sent to the oxygen delignification reaction tower through a centrifugal medium-concentration pump.
  • the slurry is mixed with the added oxygen of 20 kg per ton of pulp and the alkali content of the alkali solution of 3.5% of the dry pulp by sodium hydroxide before entering the reaction tower, and steam is introduced into the pipeline.
  • the slurry is heated to heat. After the slurry is thoroughly mixed in the mixer, it enters the oxygen delignification reaction tower.
  • the protective agent is magnesium sulfate, and the amount is 1% of the absolute dry pulp.
  • the inlet temperature is 95 ° C
  • the pressure is 0.9 Mpa
  • the residence time is 75 minutes.
  • the slurry was able to carry out a sufficient delignification reaction with a temperature of 100 ° C at the top of the column and a pressure of 0.4 MPa.
  • the slurry is sprayed into a slurry tank and diluted to obtain the unbleached pulp.
  • the unbleached pulp has a crack length of 6.8 km, a folding resistance of 50 times, a tear degree of 250 mN, a whiteness of 41% ISO, a beating degree of 36°, and a weight fraction of 70% of the above-mentioned unbleached straw pulp.
  • the pulping quality standard obtained after beating is: straw pulp
  • the degree of beating is 34° SR
  • the wet weight of beating is 1.8g
  • the degree of pulping of wood pulp is 22 ° SR
  • the wet weight of beating is 10 g.
  • the unbleached wood pulp is a prior art unbleached wood pulp having a crack length of 6.5 km, a tearing degree of 1000 mN, a whiteness of 18% ISO, and a folding resistance of 1000 times.
  • the pulp after the beating was mixed and then subjected to papermaking to obtain the above-described natural offset printing paper.
  • the papermaking comprises papermaking the pulp obtained after the above-mentioned beating, and the papermaking is carried out in a long-web multi-cylinder machine.
  • the natural offset printing paper has a basis weight of 70.0 g/m2, an opacity of 84%, a crack length of 4.9 km, a whiteness of 52% ISO, a transverse folding resistance of 22 times, and a tearing degree of 229 mN.
  • the bagasse raw material is subjected to dry preparation, and is then removed into the steaming ball, and the cooking liquid is added to the steaming ball.
  • Ammonium sulfate is added in an amount of 11% of the dry raw material, the liquid ratio is 1:2.5, the first heating is heated to 130 ° C, the temperature is kept at this temperature for 20 minutes, the small steam is released for 20 minutes, and the second heating is heated for 50 minutes. The temperature was 165 ° C and the temperature was kept for 70 minutes.
  • the high hardness pulp with a hardness of 21 corresponding to the Kappa price of 32 is obtained by steaming, and the degree of beating is 14.2 ° SR.
  • the high-hardness pulp is sent to the double-screw extruder for extracting black liquor in the prior art for sintering, and the slurry is squeezed.
  • a high-concentration slurry with a concentration of 25% is obtained, and after being diluted to 2.5% by black liquor, it is sent to a washing of a vacuum washer, the slurry concentration is 10-13%, and then the obtained slurry is heated by a screw conveyor to 70. °C and transported to the medium thick slurry tube.
  • the slurry is firstly subjected to quenching and tempering treatment to remove the air in the slurry to be fluidized, and then sent to the oxygen delignification reaction tower through a centrifugal medium-concentration pump.
  • the slurry is mixed with the added oxygen of 30 kg per ton of pulp and the alkali solution of 3% by weight of sodium hydroxide in the pipeline before entering the reaction tower, and steam is introduced into the pipeline.
  • the slurry is heated to heat.
  • the protective agent is magnesium sulfate, and the amount is 0.8% by weight of the absolute dry pulp.
  • the inlet temperature is 98 ° C
  • the pressure is 1.05 Mpa
  • the residence time is 85 minutes.
  • the slurry was able to carry out a sufficient delignification reaction with a temperature of 102 ° C at the top of the column and a pressure of 0.4 MPa.
  • the unbleached pulp has a crack length of 6.0 km, a folding resistance of 70 times, a tearing degree of 230 m, a whiteness of 40% ISO, and a beating degree of 35° SR.
  • the obtained pulping quality standards are: straw pulping concentration 3.2%, wood pulp beating concentration 4.0%, straw pulping degree 33° SR, beating wet weight 2.0 g, wood pulp beating degree 18
  • the wet weight of the beating is l lg.
  • the slurry after the beating was mixed and then subjected to papermaking to obtain the above-described natural offset printing paper.
  • the papermaking is carried out in a short-length multi-cylinder machine.
  • the natural offset printing paper has a basis weight of 65.0 g/m 2 , an opacity of 85%, a crack length of 5.5 km, a whiteness of 48% ISO, a lateral folding resistance of 28 times, and a tearing degree of 230 mN.
  • the arundo donax is loaded into the steaming ball with a hammer crusher, and the cooking liquid is added to the steaming ball.
  • the ammonium sulfite is added in an amount of 11% of the dry raw material, and the liquid ratio is 1:3, the first heating The temperature was raised to 140 ° C, the temperature was kept at this temperature for 40 minutes, the gas was slightly released for 20 minutes, and the second heating was carried out for 60 minutes until the temperature was 175 ° C, and the temperature was maintained for 90 minutes.
  • a high-hardness pulp having a hardness of 19 equivalent to a Kappa price of 28.5 and a beating degree of 15.6° SR is obtained, and then the high-hardness slurry is sent to a prior art variable-diameter single-screw extruder for extracting black liquor for sintering. After the slurry is squeezed, a high-concentration pulp with a concentration of 26% is obtained. The slurry from the extruder is diluted with dilute black liquor to a concentration of 2.5-3.0%, and sent to a sieve for coarse slurry screening, and the sieve loss is lost. 0.2%, the impurities were removed by a high-concentration cleaner, and the loss was 0.1%.
  • the slurry obtained after the slag removal was washed into a horizontal belt washer, and the slurry concentration during washing was 2.0%, from the washer.
  • the concentration of the pulp is 9%, and it is kept at 70 °C during the washing process. Then it is transported to the disintegrator for dissolving.
  • the decomposing degree of the re-baked pulp before the disintegration is 24 ° SR.
  • the degree of enthalpy of the slurry was 27 ° SR.
  • the concentration was adjusted to 10%, the slurry was heated to 70 ° C by a screw conveyor and transferred to a medium consistency slurry tube.
  • the slurry is firstly subjected to quenching and tempering treatment to remove the air in the slurry to be fluidized, and then sent to the oxygen delignification reaction tower through a centrifugal medium-concentration pump.
  • the slurry is mixed with the added oxygen of 30 kg per ton of pulp and the amount of alkali in the pipeline before the entry into the reaction tower, and the amount of alkali is mixed with 4% alkali solution of sodium hydroxide, and steam is introduced into the pipeline.
  • the slurry is heated to heat. After the slurry is thoroughly mixed in the mixer, it enters the oxygen delignification reaction tower.
  • the protective agent is magnesium sulfate, and the amount is 1% by weight of the absolute dry pulp.
  • the inlet temperature is 102 ° C
  • the pressure is 1.2 Mpa
  • the residence time is 90 minutes.
  • the slurry was able to carry out a sufficient delignification reaction with a temperature of 105 ° C at the top of the column and a pressure of 0.5 MPa.
  • the slurry is sprayed into a slurry tank and diluted to obtain the unbleached pulp.
  • the unbleached pulp has a crack length of 7.5 km, a folding resistance of 80 times, a tearing degree of 280 mN, a whiteness of 37% ISO, and a beating degree of 33° SR.
  • the beating current is 62A; then the beating is carried out in a double disc refining machine with a beating concentration of 3.4%, a beating degree of 35 ° SR, a beating wet weight of 2.2 g, a pulping concentration of 4.5%, and a beating degree of 19° SR. , wet weight 12g.
  • the unbleached wood pulp is a prior art unbleached wood pulp.
  • the pulp after the beating was subjected to papermaking to obtain the original food packaging paper.
  • the papermaking comprises papermaking the pulp obtained after the above-mentioned beating, and the papermaking is carried out in a single-drum single-drying single-fleece tissue machine, and after the papermaking, the natural food wrapping paper according to the present invention is obtained.
  • the natural food packaging paper has a basis weight of 60.0 g/m 2 , a thickness of 79.0 m, a smoothness of 47S on the front side, a 39S on the reverse side, a whiteness of 20% ISO, an opacity of 97.6%, and a crack length of 6.8 km.
  • the transverse folding resistance was 150 times, the transverse tearing degree was 600 m N , and the moisture content was 5.2%.
  • the hot black liquor with a temperature of 135 °C is charged into the cooking pot through the potter.
  • the liquid ratio is 1:7.
  • After closing the lid add the cooking agent at a temperature of 145 °C to the cooking pot.
  • the amount of alkali is 13% of the amount of dry raw material based on sodium hydroxide, and the amount of niobium added is 0.5% of the amount of dry raw material.
  • the black liquor and air were drained and the pressure was raised to 0.6 MPa.
  • the cooking liquid circulation pump and the tube heater of the cooking pot were turned on to heat the cooking liquid to 155 ° C, and the temperature was raised and kept for 160 minutes.
  • the hot black liquor is replaced with a dilute black liquor, and sent to a hot black liquor tank.
  • a high-hardness pulp having a hardness of 20 equivalent to a Kappa price of 30 is obtained, and the pulping degree is 15° SR, and the concentration of the high-hardness pulp is adjusted to 18 %, then transferred to a disc grinder for dissolving, and then washed by a conventional washing method, after which the slurry was heated to 70 ° C by a screw conveyor and conveyed to a medium thick slurry tube.
  • the slurry is firstly subjected to quenching and tempering treatment to remove the air in the slurry to be fluidized, and then sent to the oxygen delignification reaction tower through a centrifugal medium-concentration pump.
  • the slurry is mixed with the added oxygen of 35 kg per ton of pulp and the alkali content of the alkali solution of 2.5% of the dry pulp by sodium hydroxide before entering the reaction tower, and is introduced into the pipeline.
  • the slurry is heated to heat the slurry. After the slurry is thoroughly mixed in the mixer, it enters the oxygen delignification reaction tower to protect it.
  • the agent is magnesium sulfate, the amount is 1% by weight of the absolute dry pulp, the inlet temperature is 100 ° C, the pressure is 1.2 Mpa, and the residence time is 80 minutes to enable the slurry to carry out sufficient delignification reaction.
  • the temperature at the top of the column is 105 ° C, pressure. Keep it at 0.4 MPa.
  • the slurry is sprayed into a slurry tank and diluted to obtain the unbleached pulp.
  • the unbleached pulp has a crack length of 7.0 km, a folding resistance of 60 times, a tearing degree of 240 mN, a whiteness of 37% ISO, and a beating degree of 37° SR.
  • the unbleached wood pulp is a prior art unbleached wood pulp having a crack length of 7 km, a tearing degree of 1000 mN, a whiteness of 20% ISO, and a folding endurance of 1000 or more.
  • the slurry after the beating was mixed and hooked, and the paper was prepared to obtain the original food packaging paper.
  • the natural food packaging paper has a basis weight of 45 g/m 2 , a thickness of 79.0 ⁇ m, a smoothness of 45 S on the front side, a reverse side of 36 S, a whiteness of 45% ISO, an opacity of 97.6%, and a crack length of 5.8 km.
  • the transverse folding resistance was 170 times, the transverse tearing degree was 550 m N , and the moisture content was 5.3%.
  • the reeds prepared by using the hammer crusher are put into the steaming ball, and the cooking liquid is added to the steaming ball.
  • the alkali amount is 9% of the dry raw material by sodium hydroxide, and the amount of the cerium is 0.8. %, liquid ratio 1: 4, the first heating temperature is raised to 110 V, the temperature is kept at this temperature for 40 minutes, the small steam is released for 30 minutes, and the second heating is heated for 50 minutes to a temperature of 173 ° C for 60 minutes.
  • a high-hardness pulp having a hardness of 20 equivalent to a Kappa price of 30.7 and a beating degree of 12.5 ° SR is obtained, and then the high-hardness slurry is sent to a prior art variable-diameter single-screw extruder for extracting black liquor for sintering.
  • a high-durability slurry having a concentration of 20% is obtained, and then washed by a conventional washing method such as a pressure washing machine, and then sent to a disc grinding and dispersing machine for dissolving, and then the slurry is heated to 70 ° C by a screw conveyor. And transported to the middle thick slurry pipe.
  • the slurry is firstly subjected to quenching and tempering treatment to remove the air in the slurry to be fluidized, and then sent to the oxygen delignification reaction tower through a centrifugal medium-concentration pump.
  • the slurry is mixed with the added oxygen of 20 kg per ton of pulp and the alkali content in the pipeline before entering the reaction tower is 4% alkali solution by weight of sodium hydroxide, and steam is introduced into the pipeline.
  • the slurry is heated to heat. After the slurry is thoroughly mixed in the mixer, it enters the oxygen delignification reaction tower.
  • the protective agent is magnesium sulfate, and the amount is 1% by weight of the absolute dry pulp.
  • the inlet temperature is 95 ° C
  • the pressure is 0.9 Mpa
  • the residence time is 70 minutes.
  • the slurry was able to carry out a sufficient delignification reaction with a temperature of 100 ° C at the top of the column and a pressure of 0.3 MPa.
  • the slurry is sprayed into a slurry tank and diluted to obtain the unbleached pulp.
  • the unbleached pulp has a crack length of 5.8 km, a folding resistance of 55 times, a tearing degree of 260 mN, a whiteness of 40% ISO, and a beating degree of 38° SR.
  • the pulping concentration of the pulp was 3.5%
  • the pulping concentration of the wood pulp was 4.5%
  • the beating was carried out in a double-disc refiner, which was obtained after beating.
  • the quality standard of the pulping is: the pulping degree is 35° SR, the wet weight of the pulping is 2.0g, the pulping degree of the wood pulp is 20° SR, and the wet weight of the beating is 12 g.
  • the unbleached wood pulp is a prior art unbleached kraft softwood pulp having a crack length of 5.0 km, a tear degree of 1100 mN, a whiteness of 18% IS0, a folding resistance of 1000 times or more, beating.
  • the degree is 39 ° SR.
  • the pulp after the beating was subjected to papermaking to obtain the original food packaging paper.
  • the original color food packaging paper has a basis weight of 51.5 g/m 2 , a thickness of 75.0 ⁇ ⁇ , a smoothness of 48S for the front, 36S for the reverse side, a whiteness of 40% ISO, an opacity of 96.8%, and a crack length of 3.2 km.
  • the transverse folding resistance is 140 times, the transverse tearing degree is 380 m N , and the moisture content is 5.8%.
  • the cotton stalks prepared by the hammer crusher are charged into the steaming ball, and the cooking liquid is added to the steaming ball, and the alkali amount is 8% of the dry raw material, and the sulphurization degree is 8%.
  • liquid ratio 1: 2 the first heating to 110 ° C, at this temperature for 40 minutes, then small steam for 25 minutes, secondary heating for 45 minutes to a temperature of 166 ° C, holding for 75 minutes.
  • a high-hardness pulp having a hardness of 22 equivalent to a Kappa price of 35 and a beating degree of 11.6° SR is obtained, which is sent to a high-frequency disintegrator for disintegration, and then the high-hardness pulp is sent to the prior art for extracting black liquor.
  • the double-roller squeezer performs the slurrying, and after the slurry is squeezed, a high-hardness slurry with a concentration of 32% is obtained, and the concentration is adjusted to 2.5% with the diluted black liquor.
  • the washing is carried out by a conventional washing method, and the washing is performed.
  • the consistency of the slurry was adjusted to 15%.
  • the slurry was heated to 70 ° C by a screw conveyor and transferred to a medium consistency tube.
  • the slurry is first subjected to quenching and tempering treatment in the middle thick slurry tube to remove the air in the slurry to be fluidized, and then transferred to the oxygen delignification reaction column through a centrifugal medium-concentration pump.
  • the slurry is mixed with the added oxygen of 20 kg per ton of pulp and the alkali solution of 3% by weight of sodium hydroxide in the pipeline before entering the reaction tower, and steam is introduced into the pipeline.
  • the slurry is heated to heat.
  • the protective agent is magnesium sulfate, and the amount is 1% by weight of the absolute dry pulp.
  • the inlet temperature is 95 ° C
  • the pressure is 0.9 Mpa
  • the residence time is 90 minutes.
  • the slurry was able to carry out a sufficient delignification reaction with a temperature of 100 ° C at the top of the column and a pressure of 0.4 MPa.
  • the slurry is sprayed into a slurry tank and diluted to obtain the unbleached pulp.
  • the unbleached pulp has a crack length of 4.3 km, a folding resistance of 70 times, a tearing degree of 275 m, a whiteness of 42% ISO, and a beating degree of 34° SR.
  • the pulping degree is 55° SR
  • the wet weight of the pulping is 2.0g
  • the pulping degree of the wood pulp is 48 ° SR
  • the wet weight of the beating is 2.6 g.
  • the unbleached wood pulp is a prior art unbleached kraft softwood pulp having a crack length of 5.0 km, a tear degree of 1100 mN, a whiteness of 18% IS0, a folding resistance of 1000 times or more, beating.
  • the degree is 39 ° SR.
  • the pulp after the beating was subjected to papermaking to obtain the above-mentioned natural copy paper.
  • the natural copy paper has a basis weight of 60.0 g/m 2 , a longitudinal and transverse average crack length of 4.5 km, a longitudinal stiffness of 112 m N , a lateral stiffness of 72 m N and a whiteness of 44.7% ISO.
  • the straw and wheat straw with a mass ratio of 1:3 are dry-prepared by a hammer crusher and then charged into a steaming ball.
  • the cooking liquor is added to the steaming ball, and the amount of alkali is used to calculate the amount of dry raw materials. 11%, the degree of sulfidation is 5%, the liquid ratio is 1: 4, the first heating is heated to 110 ° C, the temperature is kept at this temperature for 20 minutes, the small steam is released for 30 minutes, and the second heating is heated for 40 minutes until the temperature is 168 ° C, keep warm for 90 minutes.
  • the hardness is 19, which is equivalent to the high hardness pulp of Kappa price 29.
  • the degree of beating is 14.3 ° SR, and then sent to the conventional single-screw extruder for extracting black liquor for slurrying, from the extruder.
  • the slurry is diluted with dilute black liquor to a concentration of 3.0%, sent to a sieve for coarse slurry screening, the sieve loss is 0.2%, and the impurities are removed by a high-concentration cleaner to lose 0.1%.
  • the solution is dissipated in the high-frequency disintegrating machine, and the slurry is firstly subjected to quenching and tempering treatment to remove the air in the slurry to be fluidized, and then transferred to the oxygen delignification reaction tower through a centrifugal medium-concentration pump.
  • the slurry is mixed with the added oxygen of 20 kg per ton of pulp and the alkali solution of 4% by weight of sodium hydroxide on the basis of sodium hydroxide before entering the reaction tower, and steam is introduced into the pipeline.
  • the slurry is heated to heat. After the slurry is thoroughly mixed in the mixer, it enters the oxygen delignification reaction tower.
  • the protective agent is magnesium sulfate, and the amount is 1% by weight of the absolute dry pulp.
  • the inlet temperature is 95 ° C
  • the pressure is 0.9 Mpa
  • the residence time is 75 minutes.
  • the slurry was able to carry out a sufficient delignification reaction with a temperature of 100 ° C at the top of the column and a pressure of 0.3 MPa.
  • the slurry is sprayed into the slurry tank and diluted to obtain the unbleached grass pulp.
  • the unbleached straw pulp has a crack length of 7.2 km, a folding resistance of 45 times, a tearing degree of 250 mN, a whiteness of 42% ISO, and a beating degree of 33 ° SR.
  • the beating current is 62A; then the beating is carried out in a double disc refining machine with a beating concentration of 3.4%, a beating pressure of 0.20 MPa, and a beating current of 60 A.
  • the pulping quality standard obtained after beating is: ° SR, wet weight of 3.2g.
  • the unbleached wood pulp is a prior art unbleached wood pulp, including unbleached sulfate softwood pulp, unbleached sulfite softwood pulp, etc., and the crack length is
  • tearing degree is 1000mN
  • whiteness is 20%ISO
  • folding resistance is more than 1000 times
  • degree of beating is 38° SR.
  • the pulp after the beating was subjected to papermaking to obtain the above-mentioned natural copy paper.
  • the natural copy paper has a basis weight of 65.0 g/m 2 , a longitudinal and transverse average crack length of 7.5 km, a longitudinal stiffness of 82 m N , a lateral stiffness of 55 m N and a whiteness of 41.8% ISO.
  • Example 9 The straw is dry-prepared by a hammer crusher and then charged into a steaming ball.
  • the steaming liquid is added to the steaming ball, and the amount of the dry raw material is 15% by the amount of alkali, and the liquid ratio is 1:3.
  • the amount of hydrazine added is 0.6% of the amount of dry raw materials.
  • the first heating is heated to 120 ° C, the temperature is kept at this temperature for 20 minutes, the small steam is released for 20-30 minutes, and the second heating is heated for 40 minutes to a temperature of 168. °C, keep warm for 90 minutes.
  • a high-hardness pulp with a hardness of 18 equivalent to the Kappa price of 27 is obtained, and the degree of beating is 17° SR, which is then sent to a conventional single-screw extruder for extracting black liquor for slurrying, which is discharged from the extruder.
  • the slurry is diluted with dilute black liquor to a concentration of 2.5%, sent to a sieve for coarse slurry screening, the sieve loss is 0.2%, and the impurities are removed by a high-concentration cleaner to lose 0.1%, and then the residue is removed.
  • the obtained slurry is washed into a horizontal belt washer, and the slurry concentration during washing is 3.0%, the concentration of the slurry from the washer is 9%, and the washing process is maintained at 68-70 ° C, and then transported.
  • Dissolve in the high-frequency disintegrator adjust the concentration, and then heat the slurry to 70 ° C by a screw conveyor and transport it to the medium-concentration slurry tube.
  • the slurry is firstly subjected to quenching and tempering treatment to remove the air in the slurry to be fluidized, and then sent to the oxygen delignification reaction tower through a centrifugal medium-concentration pump.
  • the slurry is in the pipeline with the added oxygen of 20 kg per ton of slurry and the alkali content of the alkali solution of 4% of the absolute dry pulp before entering the reaction tower, and steam is introduced into the pipeline.
  • the slurry is heated to heat.
  • the protective agent is magnesium sulfate, and the amount is 1% by weight of the absolute dry pulp.
  • the inlet temperature is 102 ° C
  • the pressure is 1.12 MPa
  • the residence time is 70 minutes.
  • the slurry was able to carry out a sufficient delignification reaction with a temperature of 104 ° C at the top of the column and a pressure of 0.5 MPa.
  • the unbleached pulp has a crack length of 4.4 km, a folding resistance of 65 times, a tearing degree of 245 mN, a whiteness of 37% ISO, and a beating degree of 34° SR.
  • the pulping quality standards are: grass pulping degree 55 ° SR, beating wet weight 2.0 g, wood pulp beating degree 48 ° SR, beating wet weight 2.0 g.
  • the unbleached wood pulp is a prior art unbleached sulphate hardwood pulp.
  • the pulp after the beating was subjected to papermaking to obtain the above-mentioned natural copy paper.
  • the natural copy paper has a basis weight of 72.0 g/m 2 , a longitudinal and transverse average crack length of 6.2 km, a longitudinal stiffness of 90 m N , a transverse stiffness of 56 m N and a whiteness of 35.0% ISO.
  • the straw and wheat straw with a mass ratio of 1:3 are dry-prepared by a hammer crusher and then charged into a steaming ball.
  • the cooking liquor is added to the steaming ball, and the amount of alkali is used to calculate the amount of dry raw materials. 11%, the degree of sulfidation is 5%, the liquid ratio is 1: 4, the first heating is heated to 110 ° C, the temperature is kept at this temperature for 20 minutes, the small steam is released for 30 minutes, and the second heating is heated for 40 minutes until the temperature is 168 ° C, keep warm for 90 minutes.
  • the hardness is 19, which is equivalent to the high hardness pulp of Kappa price 29.
  • the degree of beating is 14.3 ° SR, and then sent to the conventional single-screw extruder for extracting black liquor for slurrying, from the extruder.
  • the slurry is diluted with dilute black liquor to a concentration of 3.0%, sent to a sieve for coarse slurry screening, the sieve loss is 0.2%, and the impurities are removed by a high-concentration cleaner to lose 0.1%.
  • the solution is dissipated in the high-frequency disintegrating machine, and the slurry is firstly subjected to quenching and tempering treatment to remove the air in the slurry to be fluidized, and then transferred to the oxygen delignification reaction tower through a centrifugal medium-concentration pump.
  • the slurry is mixed with the added oxygen of 20 kg per ton of pulp and the alkali solution of 4% by weight of sodium hydroxide on the basis of sodium hydroxide before entering the reaction tower, and steam is introduced into the pipeline.
  • the slurry is heated to heat. After the slurry is thoroughly mixed in the mixer, it enters the oxygen delignification reaction tower.
  • the protective agent is magnesium sulfate, and the amount is 1% by weight of the absolute dry pulp.
  • the inlet temperature is 95 ° C
  • the pressure is 0.9 Mpa
  • the residence time is 75 minutes.
  • the slurry was able to carry out a sufficient delignification reaction with a temperature of 100 ° C at the top of the column and a pressure of 0.3 MPa.
  • the slurry is sprayed into a slurry tank and diluted to obtain the unbleached grass pulp.
  • the unbleached straw pulp has a crack length of 7.2 km, a folding resistance of 45 times, a tearing degree of 250 mN, a whiteness of 42% ISO, and a beating degree of 33 ° SR.
  • the above-mentioned unbleached straw pulp was beaten, and the beating degree was 30° SR, and the wet weight of the beating was 2.3 g.
  • the pulp after the beating is mixed and post-treated to obtain the original color lunch box.
  • the post-treatment is an oil repellent, the addition amount is U%; the water repellent agent is 3.3%, the fixing agent is 0.15%, and the drying temperature is 18 CTC drying time of 75 s under the vacuum degree of 0.055 MP.
  • the obtained color lunch box fully meets the requirements of GB 18006.1-1999 A and the like.
  • the straw is dry-prepared by a hammer crusher and then charged into a steaming ball.
  • the steaming liquid is added to the steaming ball, and the amount of the dry raw material is 15% by the amount of alkali, and the liquid ratio is 1:3.
  • the amount of hydrazine added is 0.6% of the amount of dry raw materials.
  • the first heating is heated to 120 ° C, the temperature is kept at this temperature for 20 minutes, the small steam is released for 20-30 minutes, and the second heating is heated for 40 minutes to a temperature of 168. °C, keep warm for 90 minutes.
  • a high-hardness pulp with a hardness of 18 equivalent to the Kappa price of 27 is obtained, and the degree of beating is 17° SR, which is then sent to a conventional single-screw extruder for extracting black liquor for slurrying, which is discharged from the extruder.
  • the slurry is diluted with dilute black liquor to a concentration of 2.5%, sent to a sieve for coarse slurry screening, the sieve loss is 0.2%, and the impurities are removed by a high-concentration cleaner to lose 0.1%, and then the residue is removed.
  • the obtained slurry is washed into a horizontal belt washer, and the slurry concentration during washing is 3.0%, the concentration of the slurry from the washer is 9%, and the washing process is maintained at 68-70 ° C, and then transported.
  • Dissolve in the high-frequency disintegrator adjust the concentration, and then heat the slurry to 70 ° C by a screw conveyor and transport it to the medium-concentration slurry tube.
  • the slurry is firstly subjected to quenching and tempering treatment to remove the air in the slurry to be fluidized, and then sent to the oxygen delignification reaction tower through a centrifugal medium-concentration pump.
  • the slurry is in the pipeline with the added oxygen of 20 kg per ton of slurry and the alkali content of the alkali solution of 4% of the absolute dry pulp before entering the reaction tower, and steam is introduced into the pipeline.
  • the slurry is heated to heat.
  • the protective agent is magnesium sulfate, and the amount is 1% by weight of the absolute dry pulp.
  • the inlet temperature is 102 ° C
  • the pressure is 1.12 MPa
  • the residence time is 70 minutes.
  • the pulp can perform a full delignification reaction, the top of the tower
  • the temperature was 104 ° C and the pressure was maintained at 0.5 MPa.
  • the unbleached pulp has a crack length of 4.4 km, a folding resistance of 65 times, a tearing degree of 245 mN, a whiteness of 37% ISO, and a beating degree of 34° SR.
  • the pulp after the beating is mixed and post-treated to obtain the original color lunch box.
  • the post-treatment is that the amount of the oil-repellent agent is 1.1%; the water repellent agent is 3.3%, the fixing agent is 0.15%, and the drying temperature is 178° C. and the drying time is 78 S under the vacuum degree of 0.05 MPa.
  • the obtained color lunch box fully meets the requirements of GB 18006.1-1999 A and the like.
  • the dry bamboo is prepared by conventional dry method, it is put into the steaming ball, and the cooking liquid is added to the steaming ball.
  • the alkali amount is 11% of the absolute dry pulp by the amount of sodium hydroxide, and the amount of the cerium added is 0.8%.
  • Ratio 1: 4 the first heating temperature is raised to 130 ° C, the temperature is kept at this temperature for 40 minutes, the small steam is released for 30 minutes, the second heating is heated for 60 minutes to a temperature of 173 ° C, and the temperature is maintained for 60 minutes. After cooking, a high-hardness pulp with a hardness of 25 equivalent to a Kappa price of 45 is obtained, and the degree of beating is 12° SR.
  • the high-hardness pulp is sent to a conventional single-screw extruder for extracting black liquor for extrusion in the prior art.
  • a high-concentration pulp with a concentration of 20% is obtained, which is sent to the sieve for coarse slurry screening.
  • the loss of the sieve is 0.2%, and the impurities are removed by the high-concentration cleaner to lose 0.1%, and then the residue is removed.
  • the obtained slurry is washed into a horizontal belt washer, and the slurry concentration during washing is 2.0%, the concentration of the slurry from the washer is 9%, and the washing process is maintained at 68-70 ° C, and the mixture is adjusted to pass through the spiral.
  • the conveyor heats the slurry to 70 ° C and delivers it to a medium consistency slurry tube.
  • the slurry is firstly subjected to quenching and tempering treatment to remove the air in the slurry to be fluidized, and then sent to the oxygen delignification reaction tower through a centrifugal medium-concentration pump.
  • the slurry is mixed with the added oxygen of 20 kg per ton of pulp and the amount of alkali in the pipeline before the entry into the reaction tower, and the amount of alkali is mixed with 4% alkali solution of sodium hydroxide, and steam is introduced into the pipeline.
  • the slurry is heated to heat. After the slurry is thoroughly mixed in the mixer, it enters the oxygen delignification reaction tower.
  • the protective agent is magnesium sulfate, and the amount is 1% by weight of the absolute dry pulp.
  • the inlet temperature is 102 ° C
  • the pressure is 1.12 MPa
  • the residence time is 75 minutes.
  • the slurry was able to carry out a sufficient delignification reaction with a temperature of 104 ° C at the top of the column and a pressure of 0.5 MPa.
  • the slurry is sprayed into a slurry tank and diluted to obtain the unbleached pulp.
  • the unbleached pulp has a crack length of 5.0 km, a folding resistance of 69 times, a tearing degree of 255 mN, a whiteness of 42% ISO, and a beating degree of 33 ° SR.
  • the pulp after the beating is mixed and post-treated to obtain the original color lunch box.
  • the post-treatment is that the amount of the oil-repellent agent is 1.2%; the water-repellent agent is 3%, the fixing agent is 0.15%, and the drying temperature is 175° C. and the drying time is 80 s under the condition of a vacuum degree of 0.055 MP.
  • the obtained color lunch box fully meets the requirements of GB 18006.1-1999 A and the like.
  • the wheat straw raw material is prepared into a steaming ball by using a hammer crusher, and the cooking liquid is added to the steaming ball.
  • the ammonium sulfite is added in an amount of 9% of the dry raw material, the liquid ratio is 1:3, and the first heating is performed.
  • the temperature was raised to 110 ° C, the temperature was kept at this temperature for 30 minutes, the gas was slightly released for 25 minutes, and the second heating was heated for 60 minutes to a temperature of 168 ° C for 90 minutes.
  • the hardness of the high-hardness pulp obtained after cooking is 22 equivalent to the Kappa price of 35.5, the degree of beating is 11.6 ° SR, diluted with dilute black liquor to a concentration of 2.5%, and then subjected to prior art screening methods such as sieve screening. For screening, the loss in the screening was 0.5%. It is then washed using a prior art vacuum washer. After washing, a high-durability slurry having a concentration of 10% was obtained and transferred to a medium-concentration slurry tube. It is sent to the oxygen delignification reaction tower through a medium-concentration pump.
  • the slurry is mixed with the added oxygen of 20 kg per ton of slurry and the alkali solution of 4% of sodium hydroxide by sodium hydroxide before entering the reaction tower, and the slurry is heated by steam in the pipeline. Warm up. After the slurry is thoroughly mixed in the mixer, it enters the oxygen delignification reaction tower.
  • the protective agent is magnesium sulfate, and the amount is 1% of the absolute dry pulp.
  • the inlet temperature is 95 ° C
  • the pressure is 0.9 Mpa
  • the residence time is 75 minutes.
  • the slurry was able to carry out a sufficient delignification reaction with a temperature of 100 ° C at the top of the column and a pressure of 0.3 MPa.
  • the unbleached straw pulp has a crack length of 5.0 km, a folding resistance of 40 times, a tearing degree of 220 mN, a whiteness of 40% ISO, and a beating degree of 34° SR.
  • the above-mentioned unbleached straw pulp was beaten, and the pulping quality obtained after beating was as follows: the beating degree was 45° SR, and the wet weight of beating was 2.8 g.
  • the pulp after the beating was subjected to papermaking to obtain the original paper towel.
  • the papermaking is carried out in a long net single cylinder paper machine.
  • the natural color paper has a basis weight of 23.0 g/m2, a lateral aspiration height of 66 mm/100 s, a longitudinal wet tensile strength of 36 N/m, and a whiteness of 41.5% ISO.
  • the straw raw material is dry-prepared by the hammer crusher, it is charged into the batch type spherical digester, and the cooking liquid is added to the batch type spherical digester, and the ammonium sulfite is added in an amount of 13% of the absolute dry material amount.
  • the ratio is 1:4, the first heating is heated to 120 ° C, the temperature is kept at this temperature for 40 minutes, the small steam is released for 25 minutes, and the second heating is heated for 60 minutes to a temperature of 168 ° C, and the temperature is maintained for 90 minutes.
  • the hardness of the high-hardness pulp obtained after cooking is 16 equivalent to the Kappa number 23, the degree of beating is 23.4° SR, diluted with dilute black liquor to a concentration of 2.5%, and subjected to prior art screening methods such as sieve screening. For screening, the loss in the screening was 0.2%. It is then washed by a prior art vacuum washer. After washing, a high-durability slurry having a concentration of 10% was obtained, and then the slurry was heated to 70 ° C by a screw conveyor and transferred to a medium-thick slurry tube.
  • the slurry is firstly subjected to quenching and tempering treatment to remove the air in the slurry to be fluidized, and then sent to the oxygen delignification reaction tower through a centrifugal medium-concentration pump.
  • the slurry is mixed with the added oxygen of 20 kg per ton of pulp and the alkali content of the alkali solution of 3.5% of the dry pulp by sodium hydroxide before entering the reaction tower, and steam is introduced into the pipeline.
  • the slurry is heated to heat. After the slurry is thoroughly mixed in the mixer, it enters the oxygen delignification reaction tower.
  • the protective agent is magnesium sulfate, and the amount is 1% of the absolute dry pulp.
  • the inlet temperature is 95 ° C
  • the pressure is 0.9 Mpa
  • the residence time is 75 minutes.
  • the slurry was able to carry out a sufficient delignification reaction with a temperature of 100 ° C at the top of the column and a pressure of 0.4 MPa.
  • the slurry is sprayed into a slurry tank and diluted to obtain the unbleached pulp.
  • the unbleached pulp has a crack length of 6.8km, a folding resistance of 50 times, a tearing degree of 250 mN, a whiteness of 45% ISO, and a beating degree of 36°.
  • the obtained pulping quality standards are: straw pulping degree 50° SR, beating wet weight 1.8 g, wood pulp beating degree 46 ° SR, and beating wet weight 1.2 g.
  • the unleaved broadleaf wood pulp has a crack length of 6.5 km, a tearing degree of 1000 mN, a whiteness of 18% ISO, a folding resistance of 1000 times, and a beating degree of 38° SR.
  • the slurry after the beating was mixed and hooked, and the paper was prepared to obtain the original paper towel.
  • the papermaking is carried out in a long net twin cylinder paper machine.
  • the natural color paper towel has a basis weight of 38.2 g/m 2 , a lateral liquid absorption height of 60 mm/100 s, a longitudinal wet tensile strength of 30 N/m, and a whiteness of 38% ISO.
  • the bagasse raw material is subjected to dry preparation, and is subjected to degumming and then charged into the steaming ball, and the cooking liquid is added to the steaming ball.
  • the ammonium sulfite is added in an amount of 11% of the absolute dry material, and the liquid ratio is 1:2.5.
  • the temperature was raised to 130 ° C in one heating, and the temperature was kept at this temperature for 20 minutes, and then steamed for 20 minutes, and heated twice for 50 minutes to a temperature of 165 ° C, and kept for 70 minutes.
  • the high hardness pulp with a hardness of 21 corresponding to the Kappa price of 32 is obtained by steaming, and the degree of beating is 14.2 ° SR.
  • the high-hardness pulp is sent to the double-screw extruder for extracting black liquor in the prior art for sintering, and the slurry is squeezed. After that, a high-concentration slurry with a concentration of 25% is obtained, and after being diluted to 2.5% by black liquor, it is sent to a washing of a vacuum washer, the concentration of the slurry is 10-13%, and then the obtained slurry is heated by a screw conveyor to 70. °C and transported to the medium thick slurry tube.
  • the slurry is first subjected to quenching and tempering treatment in the middle thick slurry tube to remove the air in the slurry to be fluidized, and then transferred to the oxygen delignification reaction column through a centrifugal medium-concentration pump.
  • the slurry is mixed with the added oxygen of 30 kg per ton of pulp and the alkali solution of 3% by weight of sodium hydroxide in the pipeline before entering the reaction tower, and steam is introduced into the pipeline.
  • the slurry is heated to heat. After the slurry is thoroughly mixed in the mixer, it enters the oxygen delignification reaction tower.
  • the protective agent is magnesium sulfate, and the amount is 0.8% by weight of the absolute dry pulp.
  • the inlet temperature is 98 ° C
  • the pressure is 1.05 Mpa
  • the residence time is 85 minutes.
  • the slurry was able to carry out a sufficient delignification reaction with a temperature of 102 ° C at the top of the column and a pressure of 0.4 MPa.
  • the slurry is sprayed into the slurry tank and diluted to obtain the unbleached pulp.
  • the unbleached pulp has a crack length of 6.0 km, a folding resistance of 70 times, a tearing degree of 230 mN, a whiteness of 40% ISO, and a beating degree of 35° SR.
  • the quality of the pulp obtained after beating is: grass pulping degree 50° SR, beating wet weight 1.8g, hardwood pulping degree 41 ° SR, beating wet weight 1.5 go
  • the pulp is a prior art unbleached wood pulp, including unbleached sulfated softwood pulp, unbleached sulfite softwood pulp, etc., having a crack length of 4.5 km, a tearing degree of 500 mN, and a whiteness of 18%.
  • ISO the number of folding resistance is 1000
  • the degree of beating is 38° SR.
  • the slurry after the beating was mixed and hooked, and the paper was prepared to obtain the original paper towel.
  • the papermaking is in a single cylinder In the paper machine.
  • the natural color paper has a basis weight of 45.0 g/m 2 , a lateral liquid absorption height of 55 mm/100 s, a longitudinal wet tensile strength of 28 N/m, and a whiteness of 41% ISO.
  • the straw is dry-prepared by a hammer crusher and then charged into a steaming ball.
  • the steaming liquid is added to the steaming ball, and the amount of the dry raw material is 15% by the amount of alkali, and the liquid ratio is 1:3.
  • the amount of hydrazine added is 0.6% of the amount of dry raw materials.
  • the first heating is heated to 120 ° C, the temperature is kept at this temperature for 20 minutes, the small steam is released for 20-30 minutes, and the second heating is heated for 40 minutes to a temperature of 168. °C, keep warm for 90 minutes.
  • a high-hardness pulp with a hardness of 18 equivalent to the Kappa price of 27 is obtained, and the degree of beating is 17° SR, which is then sent to a conventional single-screw extruder for extracting black liquor for slurrying, which is discharged from the extruder.
  • the slurry is diluted with dilute black liquor to a concentration of 2.5%, sent to a sieve for coarse slurry screening, the sieve loss is 0.2%, and the impurities are removed by a high-concentration cleaner to lose 0.1%, and then the residue is removed.
  • the obtained slurry is washed into a horizontal belt washer, and the slurry concentration during washing is 3.0%, the concentration of the slurry from the washer is 9%, and the washing process is maintained at 68-70 ° C, and then transported.
  • Dissolve in the high-frequency disintegrator adjust the concentration, and then heat the slurry to 70 ° C by a screw conveyor and transport it to the medium-concentration slurry tube.
  • the slurry is first subjected to quenching and tempering treatment in the middle thick slurry pipe to remove the air in the slurry to be fluidized, and then sent to the oxygen delignification reaction tower through a centrifugal medium-concentration pump.
  • the slurry is in the pipeline with the added oxygen of 20 kg per ton of slurry and the alkali content of the alkali solution of 4% of the absolute dry pulp before entering the reaction tower, and steam is introduced into the pipeline.
  • the slurry is heated to heat.
  • the protective agent is magnesium sulfate, and the amount is 1% by weight of the absolute dry pulp.
  • the inlet temperature is 102 ° C
  • the pressure is 1.12 MPa
  • the residence time is 70 minutes.
  • the slurry was able to carry out a sufficient delignification reaction with a temperature of 104 ° C at the top of the column and a pressure of 0.5 MPa.
  • the unbleached pulp has a crack length of 4.4 km, a folding resistance of 65 times, a tearing degree of 245 mN, a whiteness of 37% ISO, and a beating degree of 34° SR.
  • the pulping quality standards are: grass pulping degree 55 ° SR, beating wet weight 2.0 g, wood pulp beating degree 48 ° SR, beating wet weight 2.0 g.
  • the unbleached wood pulp is a prior art unbleached sulphate hardwood pulp.
  • the pulp after the beating is uniformly mixed and then copied to obtain the above-mentioned plain toilet paper.
  • the natural toilet paper has a basis weight of 18.0 g/m 2 , a transverse liquid absorption height of 60 mm/100 s, a tensile index of 7.0 Nm/g, a softness of 130 mN, and a whiteness of 50% ISO.
  • the dry bamboo is prepared by conventional dry method, it is put into the steaming ball, and the cooking liquid is added to the steaming ball.
  • the alkali amount is 11% of the absolute dry pulp by the amount of sodium hydroxide, and the amount of the cerium added is 0.8%.
  • Ratio 1: 4 the first heating is raised to 130 ° C, at this temperature The temperature was kept for 40 minutes, then the gas was released for 30 minutes, and the second heating was heated for 60 minutes to a temperature of 173 ° C for 60 minutes. After cooking, a high-hardness pulp with a hardness of 25 equivalent to a Kappa price of 45 is obtained, and the degree of beating is 12° SR.
  • the high-hardness pulp is sent to a conventional single-screw extruder for extracting black liquor for extrusion in the prior art.
  • a high-concentration pulp with a concentration of 20% is obtained, which is sent to the sieve for coarse slurry screening.
  • the loss of the sieve is 0.2%, and the impurities are removed by the high-concentration cleaner to lose 0.1%, and then the residue is removed.
  • the obtained slurry is washed into a horizontal belt washer, and the slurry concentration during washing is 2.0%, the concentration of the slurry from the washer is 9%, and the washing process is maintained at 68-70 ° C, and the mixture is adjusted to pass through the spiral.
  • the conveyor heats the slurry to 70 ° C and delivers it to a medium consistency slurry tube.
  • the slurry is firstly subjected to quenching and tempering treatment to remove the air in the slurry to be fluidized, and then sent to the oxygen delignification reaction tower through a centrifugal medium-concentration pump.
  • the slurry is mixed with the added oxygen of 20 kg per ton of pulp and the amount of alkali in the pipeline before the entry into the reaction tower, and the amount of alkali is mixed with 4% alkali solution of sodium hydroxide, and steam is introduced into the pipeline.
  • the slurry is heated to heat. After the slurry is thoroughly mixed in the mixer, it enters the oxygen delignification reaction tower.
  • the protective agent is magnesium sulfate, and the amount is 1% by weight of the absolute dry pulp.
  • the inlet temperature is 102 ° C
  • the pressure is 1.12 MPa
  • the residence time is 75 minutes.
  • the slurry was able to carry out a sufficient delignification reaction with a temperature of 104 ° C at the top of the column and a pressure of 0.5 MPa.
  • the slurry is sprayed into a slurry tank and diluted to obtain the unbleached pulp.
  • the unbleached pulp has a crack length of 5.0 km, a folding endurance of 69 times, a tearing degree of 255 mN, a whiteness of 42% ISO, and a beating degree of 33° SR.
  • the unbleached wood pulp is a prior art unbleached wood pulp, including unbleached sulfate hardwood pulp, unbleached sulfite softwood pulp, etc., having a crack length of 6 km and a tearing degree of 1000 mN.
  • the whiteness is 18% ISO
  • the folding resistance is 1000 times or more
  • the beating degree is 40° SR.
  • the pulp after the beating was subjected to papermaking to obtain the above-mentioned plain toilet paper.
  • the natural toilet paper has a basis weight of 11.0 g/m 2 , a transverse liquid absorption height of 80 mm/100 s, a tensile index of 10.0 Nm/g, a softness of 120 mN, and a whiteness of 38% ISO.
  • the straw, wheat straw and reed with a mass ratio of 1:3:1 were dry-prepared by a hammer crusher and then charged into a cooking pot.
  • the hot black liquor at a temperature of 135 ° C was charged into the cooking pot through a potter. , liquid ratio 1: 8, when the lid is full, the lid is closed, and the cooking agent at a temperature of 145 °C is added to the cooking pot, and the amount of alkali is 11% of the amount of the dry raw material by the amount of sodium hydroxide.
  • the black liquor and air are discharged and raised to 0.6 MPa.
  • the cooking liquid circulation pump and the tube heater of the cooking pot are turned on to heat the cooking liquid to 160 ° C, and the temperature is raised and maintained. minute.
  • the hot black liquor is replaced with a dilute black liquor, and sent to a hot black liquor tank.
  • a high-hardness pulp having a hardness of 19 equivalent to a Kappa number of 29 is obtained, and the beating degree is 16° SR, and then sent.
  • the conventional single-screw extruder for extracting black liquor is used for slurrying, and the slurry from the extruder is diluted with dilute black liquor to a concentration of 3.0%, and sent to a sieve for coarse slurry screening.
  • the sieve loss was 0.2%, and the impurities were removed by a high-concentration cleaner to lose 0.1%.
  • the slurry obtained after the slag was removed and washed into a horizontal belt washer, and the slurry concentration during washing was 3.0%.
  • the concentration of the pulp coming out of the pulper is 9%, and it is kept at 70 during the washing process, and then transported to the high-frequency disintegrating machine for dissolving.
  • the pulp is then passed through the quenching and tempering treatment to remove the air in the slurry. Fluidized, and then sent to the oxygen delignification reaction tower by a centrifugal medium-concentration pump.
  • the slurry is mixed with the added oxygen of 20 kg per ton of pulp and the alkali solution of 4% by weight of sodium hydroxide on the basis of sodium hydroxide before entering the reaction tower, and steam is introduced into the pipeline.
  • the slurry is heated to heat.
  • the protective agent is magnesium sulfate, the amount of which is 1% by weight of the absolute dry pulp, the inlet temperature is 95 ° C, the pressure is 0.9 Mpa, and the residence time is 75 minutes.
  • the slurry was able to carry out a sufficient delignification reaction with a temperature of 100 ° C at the top of the column and a pressure of 0.4 MPa.
  • the unbleached pulp has a crack length of 6.5 km, a folding resistance of 45 times, a tearing degree of 250 mN, and a whiteness of
  • the beating degree is 33° SR.
  • the obtained pulping quality standard is: the beating degree is 48° SR, and the wet weight of beating is 2.9 g.
  • the unbleached wood pulp is a prior art unbleached wood pulp, including unbleached sulphate hardwood pulp, unbleached sulfite softwood pulp, etc., having a crack length of 6 km and a tearing degree of 1000 m.
  • the whiteness is 20% ISO, the folding resistance is 1000 times or more, and the beating degree is 38° SR.
  • the pulp after the beating was subjected to papermaking to obtain the above-mentioned plain toilet paper.
  • the natural toilet paper has a basis weight of 13.0 g/m 2 , a transverse liquid absorption height of 30 mm/100 s, a longitudinal wet tensile strength of 22 N/m, a softness of 140 mN, and a whiteness of 50% ISO.
  • the wheat straw raw material is prepared into a steaming ball by using a hammer crusher, and the cooking liquid is added to the steaming ball.
  • the ammonium sulfite is added in an amount of 9% of the dry raw material, the liquid ratio is 1:3, and the first heating is performed.
  • the temperature was raised to 110 ° C, the temperature was kept at this temperature for 30 minutes, the gas was slightly released for 25 minutes, and the second heating was heated for 60 minutes to a temperature of 168 ° C for 90 minutes.
  • the hardness of the high-hardness pulp obtained after cooking is 22 equivalent to the Kappa price of 35.5, the degree of beating is 11.6 ° SR, diluted with dilute black liquor to a concentration of 2.5%, and then subjected to prior art screening methods such as sieve screening. For screening, the loss in the screening was 0.5%. It is then washed by a prior art vacuum washer. After washing, a high-durability slurry having a concentration of 10% was obtained and transferred to a medium-concentration slurry tube. It is sent to the oxygen delignification reaction tower through a medium-concentration pump.
  • the slurry is mixed with the added oxygen of 20 kg per ton of slurry and the alkali solution of 4% of sodium hydroxide by sodium hydroxide before entering the reaction tower, and the slurry is heated by steam in the pipeline. Warm up. After the slurry is thoroughly mixed in the mixer, it enters the oxygen delignification reaction tower.
  • the protective agent is magnesium sulfate, and the amount is 1% of the absolute dry pulp.
  • the inlet temperature is 95 ° C
  • the pressure is 0.9 Mpa
  • the residence time is 75 minutes.
  • the slurry was able to carry out a sufficient delignification reaction with a temperature of 100 ° C at the top of the column and a pressure of 0.3 MPa.
  • the unfloated grass pulp has a crack length of 5.0 km, a folding resistance of 40 times, a tearing degree of 220 mN, and a whiteness of
  • the pulp after the beating was subjected to papermaking to obtain the above-described natural wiping paper.
  • the papermaking is carried out in a long net single cylinder paper machine.
  • the natural wiping paper has a basis weight of 14.0 g/m2, a lateral aspiration height of 100 mm/100 s, and a longitudinal wet tensile strength of 55.
  • the straw raw material is dry-prepared by the hammer crusher, it is charged into the batch type spherical digester, and the cooking liquid is added to the batch type spherical digester, and the ammonium sulfite is added in an amount of 13% of the absolute dry material amount.
  • the ratio is 1:4, the first heating is heated to 120 ° C, the temperature is kept at this temperature for 40 minutes, the small steam is released for 25 minutes, and the second heating is heated for 60 minutes to a temperature of 168 ° C, and the temperature is maintained for 90 minutes.
  • the hardness of the high-hardness pulp obtained after cooking is 16 equivalent to the Kappa number 23, the degree of beating is 23.4° SR, diluted with dilute black liquor to a concentration of 2.5%, and subjected to prior art screening methods such as sieve screening. For screening, the loss in the screening was 0.2%. It is then washed by a prior art vacuum washer. After washing, a high-durability slurry having a concentration of 10% was obtained, and then the slurry was heated to 70 ° C by a screw conveyor and transferred to a medium-thick slurry tube.
  • the slurry is firstly subjected to quenching and tempering treatment to remove the air in the slurry to be fluidized, and then sent to the oxygen delignification reaction tower through a centrifugal medium-concentration pump.
  • the slurry is mixed with the added oxygen of 20 kg per ton of pulp and the alkali content of the alkali solution of 3.5% of the dry pulp by sodium hydroxide before entering the reaction tower, and steam is introduced into the pipeline.
  • the slurry is heated to heat. After the slurry is thoroughly mixed in the mixer, it enters the oxygen delignification reaction tower.
  • the protective agent is magnesium sulfate, and the amount is 1% of the absolute dry pulp.
  • the inlet temperature is 95 ° C
  • the pressure is 0.9 Mpa
  • the residence time is 75 minutes.
  • the slurry was able to carry out a sufficient delignification reaction with a temperature of 100 ° C at the top of the column and a pressure of 0.4 MPa.
  • the slurry is sprayed into a slurry tank and diluted to obtain the unbleached pulp.
  • the unbleached pulp has a crack length of 6.8 km, a folding resistance of 50 times, a tearing degree of 250 mN, a whiteness of 45% ISO, a beating degree of 36°, and a weight fraction of 70% of the above-mentioned unbleached straw pulp.
  • the pulping quality standard obtained after beating is: straw pulp
  • the beating degree is 50° SR
  • the wet weight of beating is 1.8g
  • the pulping degree of wood pulp is 46 ° SR
  • the wet weight of beating is 1.2g.
  • the unleaved broadleaf wood pulp has a crack length of 6.5 km, a tearing degree of 1000 mN, a whiteness of 18% ISO, a folding resistance of 1000 times, and a beating degree of 38° SR.
  • the slurry after the beating was mixed and hooked, and the paper was prepared to obtain the above-mentioned natural wiping paper.
  • the papermaking is carried out in a long net twin cylinder paper machine.
  • the natural wiping paper has a basis weight of 36.0 g/m 2 , a transverse liquid absorption height of 60 mm/100 s, a longitudinal wet tensile strength of 40 N/m, and a whiteness of 45% ISO.

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Description

禾草类本色纸制品及其制备方法
技术领域
本发明涉及的是一种本色纸制品及其制备方法,更具体地说,本发明涉及的是一种禾草 类未漂浆为主要原料在制备本色纸制品上的应用及其制备的本色纸制品。
背景技术
生活用纸是一种常用的消费用品,但是,处于心理上对白度的需要以及对一些物理指标 的需求,通常采用以漂白木浆为主的纸浆制造,现有技术给出一些制备生活用纸的技术方案, 例如:
CN94105089涉及一种用全麦草的高效药物保健卫生纸, 该文献所述的全麦草高效药 物保健卫生纸的工艺包括纸页抄造。
CN200410026132公开了一种利用胶原纤维与植物纤维复合生活用纸的方法,具体的 包括将漂白针(阔)叶木浆、麦草浆调浆使浆液的质量浓度达到 1 %— 4 %,将漂白针(阔) 叶木浆, 麦草浆和胶原纤维浆混合, 成浆池中加入柔软剂; 然后将制的浆料混合后送往纸机 网, 湿纸经过压榨、 干燥、 卷取、 加工后即得成品。
造纸制浆行业的污染主要在蒸煮后黑液的处理和排放以及纸浆漂白这两个步骤,其中纸 浆漂白步骤的污染尤其明显。 传统含氯漂白废液的排放, 废液中不但含有 COD和 B0D等 常见的水环境污染因子, 而且还含有其他特殊污染物。例如氯化漂白、 次氯酸盐漂白等, 次 氯酸盐漂白时生产的三氯甲烷, 每漂白 1吨蔗渣浆所排出的废液约含 150— 250g, 每漂白 1吨木浆出的废液约含 700g, 氯化漂白除了产生三氯甲烷外, 废液中还含有 40多种有机 氯化物, 其中以各种氯代酚为最多, 如二氯代酚、 三氯代酚, 还有二噁英 (dioxins)和氯代 呋喃 (furans) 产物, 其中有不少是剧毒的。 A0X具有致畸、 致癌、 致突变的危害。
西欧、香港、 台湾、 日本、 韩国等发达国家和地区在办公用纸生产过程中规定了有害物 质的加入, 不得使用含氯漂白剂和荧光增白剂, 对生产过程有害含量也进行了强制性要求, 日本控制白度 (¾≡70%) 来避免过量使用荧光增白剂。 他们的标准是污水中 COD¾≡20Kg/ 吨纸; AOX¾≡0.3Kg/吨纸。 要解决水污染问题, 对企业、 对社会来说都要付出高昂的代价。
上述对比文件中采用麦草或者植物纤维原料制备卫生纸或者生活用纸,由于现有技术的 制浆方法比较落后,以禾草类植物为原料来制备纸浆时,通常将禾草类原料蒸煮至硬度很低, 如蒸煮至硬度为高锰酸钾值 11- 14, 要达到这样的低硬度, 蒸煮药液用量多以及加热和保 温时间长必不可少,而在高浓度化学药液的高温蒸煮和保温下,势必会造成禾草类原料中的 纤维素以及半纤维素的降解和损伤,不能较好的保持纤维固有的长度, 因此所制备的草浆强 度比较低, 进而所得到的卫生纸和生活用纸质量也不高。 另外, 在现有技术的卫生纸和生活 用纸的制备方法中, 都要经过漂白的步骤, 漂白步骤不仅对环境的污染很大, 对产品本身也 会造成污染, 会产生二恶英和可吸附有机卤化物等致癌物质, 对使用者造成很大的伤害; 而 且, 在现有技术的制备方法中, 即使使用木浆来制备各种纸张, 也会加入荧光增白剂等对人 类身体有害的物质, 这些物质或多或少残留在产品中会给使用者身体带来的伤害。
因此, 针对上述现有技术中所存在的缺陷, 如何针对禾草类原料, 制备更高性能的纸浆 以适用于各种高质量纸制品的制备, 现有技术没有更加详细的说明, 有鉴于此, 特提出本发 明。 发明内容
本发明的首要目的在于提供一种禾草类本色纸制品, 所述的本色纸制品包括本色卫生 纸、 本色擦手纸、 本色擦拭纸、 本色复印纸、 本色餐盒、 本色食品包装纸和本色印刷纸。 所 述纸制品强度高,而且在进行有害物质的检测试验中,二噁英和可吸附有机卤化物的均没有 检测出。
为了实现上述目的, 本发明采用的技术方案为:
一种以禾草类纸浆为原料制备的本色纸制品, 所述的本色纸制品的白度为 25-60%ISO, 优选所述白度为 35-45%ISO, 所述的禾草类纸浆为未漂草浆。
本发明所述的未漂草浆的裂断长为 5.0-7.5km,撕裂度为 230-280mN,,耐折次数为 40-90 次, 白度为 25-45%ISO, 打浆度为 32-38 ° SR; 优选所述的未漂草浆的裂断长为 6.5-7.5km, 撕裂度为 250-280mN, 耐折次数为 65-90次, 打浆度为 32-36° SR, 白度为 35-45%ISO。
本发明所述的本色纸制品包括本色卫生纸、 本色擦手纸、本色擦拭纸、本色复印纸、 本 色餐盒、 本色食品包装纸和本色印刷纸。
本发明所述的本色纸制品为本色卫生纸,所述的本色卫生纸所用的浆料包括 70-100%的 未漂草浆和 0-30%的未漂木浆,其成品层横向吸液高度为 30-100 mm/lOOs,优选所述的横向 吸液高度为 40-100 mm/100s, 更优选所述的横向吸液高度为 50-80mm/100s。
本发明所述的本色卫生纸的抗张指数为 4-12 N.m/g,优选所述的抗张指数为 8-12 N.m/g; 所述的本色卫生纸的柔软度为 120-180m N, 优选所述的本色卫生纸的柔软度为 120-150 m N; 所述的本色卫生纸的定量为 10.0-18.0 g/m2, 优选所述的本色卫生纸的定量为 11.0-13.0 g/m2
本发明所述的本色纸制品为本色擦手纸,所述的本色擦手纸所用的浆料包括 70-100%的 未漂草浆和 0-30%的未漂木浆, 其纵向湿抗张强度为 22-55N/m, 优选所述的纵向湿抗张强 度为 30-45N/m。 本发明所述的本色擦手纸的成品层横向吸液高度为 30-100 mm/100s, 优选所述的本色 擦手纸的横向吸液高度为 40-100 mm/100s, 更优选所述的本色擦手纸的横向吸液高度为 50-80 mm/100s。
本发明所述的本色擦手纸的柔软度为 120-180m N,优选所述的本色擦手纸的柔软度为 120-150 m N, 所述的本色擦手纸的定量为 23.0-45.0g/m2, 优选所述的本色擦手纸定量为 30.0-40.0 g/m2
本发明所述的本色纸制品为本色餐盒,所述本色餐盒采用 70-100%的未漂草浆和 0-30% 的未漂木浆进行制备, 其性能参数符合餐盒 GB 18006.1-1999 A等品的要求。
本发明所述的本色纸制品为本色复印纸, 所述的本色复印纸所用的浆料包括 50-80%的 未漂草浆和 20-50%的未漂木浆, 所述本色复印纸的纵横向平均裂断长为 3.2-7.5km, 优选所 述的本色复印纸的纵横向平均裂断长为 4.5-7.5km, 更优选所述的本色复印纸的纵横向平均 裂断长为 6.0-7.5km。
本发明所述本色复印纸的横向耐折度为 60-200次,优选所述的横向耐折度为 80-185次。 本发明所述的本色复印纸定量为 60.0-75.0g/m2, 优选所述的定量为 65.0-72.0 g/m2, 更 优选所述的定量为 69.0-72.0 g/m2, 所述的本色复印纸的不透明度为 82.0-98.0%, 优选所述 的不透明度为 90-98%。
本发明所述的本色纸制品为本色食品包装纸, 所述的本色食品包装纸所用的浆料包括 50-70%的未漂草浆和 30-50%的未漂木浆,所述的本色食品包装纸的裂断长为 3.2-7.6km,优 选所述的本色食品包装纸的裂断长为 4.5-7.6 km。
本发明所述的本色食品包装纸的定量为 45-65 g/m2, 优选所述的定量为 50-60g/m2, 所 述的本色食品包装纸的横向耐折度为 90-200次, 优选所述的横向耐折度为 120-200次。
本发明所述的本色食品包装纸的横向撕裂度为 300-600m N, 优选所述的本色食品包装 纸的横向撕裂度为 400-600 m N。
本发明所述的本色胶版印刷纸的白度为 30-60%ISO,所述的本色胶版印刷纸所用的浆料 包括 65-85%的未漂草浆和 15-35%的未漂木浆。
本发明所述的本色胶版印刷纸的裂断长为 2.5-5.5km, 优选所述的裂断长为 3.5-5.5km。 本发明所述的本色胶板印刷纸的不透明度为 82-98%, 优选所述的不透明度为 85-98%, 更优选所述的不透明度为 92-98%。
本发明所述的本色胶版印刷纸的耐折度为 10-35次,优选所述的横向耐折度为 15-35次。 本发明所述的本色纸制品为本色擦拭纸,所述的本色擦拭纸所用的浆料包括 70-100%的 未漂草浆和 0-30%的未漂木浆, 所述的本色擦拭纸的纵向湿抗张强度为 22-55N/m, 优选所 述本色擦拭纸的纵向湿抗张强度为 30-45N/m。
所述的本色擦拭纸的横向吸液高度为 30- 100 mm/100s, 优选所述的本色擦拭纸的横向 吸液高度为 40- 100 mm/100s, 更优选所述的本色擦拭纸的横向吸液高度为 50-80 mm/100s。
所述的本色擦拭纸的柔软度为 120-200m N,优选所述的本色擦拭纸的柔软度为 120- 180 m N; 所述的本色擦拭纸的定量为 14.0-36.0g/m2, 优选所述的本色擦拭纸的定量为 18-28 g/m2 o
本发明所述的未漂草浆的制备包括蒸煮、洗涤步骤, 其中所述的蒸煮包括: 以禾草类植 物为原料经过蒸煮后得到硬度为高锰酸钾值 16-28, 叩解度为 10-24 ° SR的高硬度浆; 优选 所述的未漂草浆以禾草类植物为原料经过蒸煮后得到硬度为高锰酸钾值 16-23, 叩解度为 10-24 ° SR的高硬度浆。
本发明所述的未漂草浆的制备包括蒸煮、 氧脱木素的步骤, 其中所述的氧脱木素包括: 将蒸煮之后得到硬度为高锰酸钾值 16-28的高硬度浆泵送至氧脱木素反应塔,并加入氢氧化 钠和氧气; 该高硬度浆在该氧脱木素反应塔内进行脱木素反应, 得到硬度为高锰酸钾值 10 - 14的浆;
优选所述的氧脱木素为单段氧脱木素,在氧脱木素反应塔中进行;所述的高硬度浆在该 反应塔进口处的温度为 95— 100°C, 压力为 0.9— 1.2MPa; 出口处的温度为 100— 105°C, 压 力为 0.2— 0.6MPa; 所述的氧脱木素处理中用碱量为以氢氧化钠计对绝干浆量的 2-4%, 氧 气的加入量为 20— 40kg每吨绝干浆; 所述的高硬度浆在该反应塔内的反应时间为 60— 90 分钟。
本发明所述的草浆, 是以禾草类植物为原料, 经蒸煮、 洗涤、 氧脱木素等步骤而制成, 所述的禾草类植物原料包括稻草、麦草、棉杆、甘蔗渣、芦苇或芦竹中的一种或几种的组合。
本发明所述的本色纸制品,主要以草浆为主要原料,必要的时候配合一定的未漂木浆或 其它造纸用浆料, 再进行打浆和抄造后得到, 由于所述的草浆为一种高质量的未漂草浆, 其 具有强度高, 耐折次数高等优良性能, 而且由于所述纸制品并没有经过漂白, 因此, 纤维的 强度将提高 30%- 50% , 纤维得率提高 10% , 纸制品的强度得到了很大的提高, 比如裂 断长等。所述本色纸制品还可以大大减少对环境的污染, 而且可以避免有害物质的产生, 避 免对人体的危害。
对于本色纸制品产品中有害物质的检测试验中,二噁英和可吸附有机卤化物的均没有检 本发明的另一目的在于, 提供一种本色纸制品的制备方法。
为了实现上述目的, 本发明采用的技术方案为: 一种制备上述本色纸制品的方法, 所述的方法包括:
( 1 ) 将禾草原料进行蒸煮, 再进行挤浆、 洗涤、 疏解后, 进行氧脱木素处理, 得到所 述的未漂草浆;
( 2 ) 将上述未漂草浆和未漂木浆分别进行打浆, 得到打浆后的浆料;
( 3 ) 将步骤 (2 ) 中上述未漂草浆和未漂木浆或其它造纸用浆料, 按照纸制品所需要 的浆料重量份进行混合, 使浆料均勾;
( 4 ) 将打浆后的浆料进行抄造, 得到所述的本色纸制品。
本发明的本色纸制品的制备方法中, 在上述步骤 (3 ) 中还包括在混合过程或者混合之 前加入除荧光增白剂外其它纸制品制备所需要的助剂。所述的制备方法为现有技术各种纸制 品的常规制备方法。
本发明所述的步骤(1 ) 中, 将禾草原料进行蒸煮得到硬度为 16-28, 打浆度为 10-24 ° SR的高硬度浆。
本发明所述的蒸煮包括亚硫酸铵法蒸煮、 蒽醌-烧碱法蒸煮、 硫酸盐法蒸煮或者碱性亚 钠法蒸煮中的一种:
所述的亚硫酸铵法蒸煮时, 亚硫酸铵的用量为对绝干原料量的 9-13%;
所述的蒽醌-烧碱法蒸煮时, 用碱量为以氢氧化钠计对绝干原料量 9-15%;
所述的硫酸盐法蒸煮时, 用碱量为氢氧化钠计对绝干原料量 8-11%;
所述的碱性亚钠法蒸煮时,氢氧化钠用量以绝干原料重量计为 11一 15%,亚硫酸钠用量 为绝干原料重量的 2— 6%。
本发明所述的蒸煮包括: 亚硫酸铵法蒸煮、 蒽醌-烧碱法蒸煮、 硫酸盐法蒸煮或者碱性 亚钠法蒸煮中的一种:
1 ) 在间歇式球形蒸煮器或连续蒸煮器中蒸煮时:
所述的亚硫酸铵法蒸煮包括:
( 1 ) 在禾草类植物原料中加入蒸煮药液, 其中亚硫酸铵用量为对绝干原料量的 9-13%, 液 比为 1: 2-4;
(2)通入蒸汽进行加热,加热升温至温度 165-173 °C,升温、小放气、保温全程时间 160-210 分钟;
所述的蒽醌 -烧碱法蒸煮包括:
( 1 )在禾草类植物原料中加入蒸煮药液, 其中用碱量为以氢氧化钠计对绝干原料量 9-15%, 液比为 1 : 2-4, 蒽醌加入量为绝干原料量的 0.5-0.8%。;
(2)通入蒸汽进行加热,加热升温至温度 160-165°C,升温、小放气、保温全程时间 140-190 分钟; 所述的硫酸盐法蒸煮包括:
( 1 ) 在禾草类植物原料中加入蒸煮药液, 其中用碱量为氢氧化钠计对绝干原料量 8-11%, 液比为 1: 2-4, 硫化度为 5-8%;
(2)通入蒸汽进行加热,加热升温至温度 165-173 °C,升温、小放气、保温全程时间 150-200 分钟;
所述碱性亚钠法蒸煮包括:
( 1 ) 在禾草原料中加入蒸煮药剂, 其中, 氢氧化钠用量以绝干原料重量计为 11一 15%, 亚 硫酸钠用量为绝干原料重量的 2— 6%, 蒽醌的用量为绝干原料重量的 0.02— 0.08%, 蒸煮液 比为 1 :3-4;
(2)通入蒸汽进行加热,加热升温至温度 160-165°C,升温、小放气、保温全程时间 140-190 分钟;
2) 在立式蒸煮锅中蒸煮时: 所述的亚硫酸铵法蒸煮为:
( 1 )在禾草类植物原料中加入蒸煮药液, 其中亚硫酸铵用量为对绝干原料量的 9-15%, 液比为 1 : 6-10;
(2) 所述禾草类植物原料由热黑液通过装锅器装入蒸煮锅中, 当装锅满后关闭锅盖, 往蒸煮锅中补充温度为 130-145'C蒸煮药剂, 同时排出锅内的空气并升压至 0.6-0.75MPa, 蒸煮药液升温至 156-173 °C, 升温、 保温和置换为 220分钟; 最后用泵放将浆送到喷放锅; 所述的蒽醌-烧碱法蒸煮为:
( 1 )在禾草类植物原料中加入蒸煮药液,其中用碱量为以氢氧化钠计对绝干原料量 9-17%, 液比为 1 : 6-9, 蒽醌加入量为绝干原料量的 0.5-0.8%。;
(2) 所述禾草类植物原料由热黑液通过装锅器装入蒸煮锅中, 当装锅满后关闭锅盖, 往蒸 煮锅中补充温度为 130-145'C蒸煮药剂, 同时排出锅内的空气并升压至 0.4-0.6MPa, 蒸煮液 升温至 147-165°C, 升温、 保温和置换为 170-200分钟, 最后用泵放将浆送到喷放锅; 所述的硫酸盐法蒸煮为:
( 1 ) 在禾草类植物原料中加入蒸煮药液, 其中用碱量为氢氧化钠计对绝干原料量 8-13%, 液比为 1 : 6-10, 硫化度为 5-9%;
(2) 所述禾草类植物原料由热黑液通过装锅器装入蒸煮锅中, 当装锅满后关闭锅盖, 往蒸 煮锅中补充温度为 130-145'C蒸煮药剂, 同时排出锅内的空气并升压至 0.5-0.65MPa, 蒸煮 液升温至 155-168°C, 升温、 保温和置换为 180-220分钟, 最后用泵放将浆送到喷放锅; 所述碱性亚钠法蒸煮包括:
( 1 ) 在禾草原料中加入蒸煮药剂, 其中, 氢氧化钠用量以绝干原料重量计为 9-17%, 亚硫 酸钠为 4-8%, 蒽醌为 0.04—0.08%, 蒸煮液比为 1 :6-10;
(2) 禾草原料由热黑液通过装锅器装入蒸煮锅中, 当装锅满后关闭锅盖, 往蒸煮锅中补充 温度为 145°C蒸煮药剂, 同时排出锅内的空气并升压至 0.45-0.6MPa, 蒸煮液升温至 152-165 V , 升温、 保温和置换为 180-220分钟, 最后用泵放将浆送到喷放锅。
本发明所述的氧脱木素包括:
( 1 ) 将蒸煮之后得到硬度为高锰酸钾值 16-28的高硬度浆泵送至氧脱木素反应塔, 并加 入氢氧化钠和氧气; 以及
(2)该高硬度浆在该氧脱木素反应塔内进行脱木素反应, 得到硬度为高锰酸钾值 10— 14 的浆;
优选所述的氧脱木素为单段氧脱木素,使用一个氧脱木素反应塔;所述的高硬度浆在该 反应塔进口处的温度为 90— 100°C, 压力为 0.9— 1.2MPa; 出口处的温度为 95— 105°C, 压 力为 0.2— 0.4MPa; 所述的氧脱木素处理中用碱量为以氢氧化钠计对绝干浆量的 2-4%, 氧 气的加入量为 20— 40kg每吨浆; 所述的高硬度浆在该反应塔内的反应时间为 60— 90分钟。
一种未漂草浆在制备权利要求 1 -3任一所述的本色纸制品方面的用途。
所述的未漂草浆的裂断长为 5.0-7.5km, 撕裂度为 230-280mN, 白度为 25-45%ISO, 耐 折次数为 40-90次, 打浆度为 32-38 ° SR; 优选所述的未漂草浆的裂断长为 6.5-7.5km, 撕裂 度为 250-280mN, 耐折次数为 65-90次, 打浆度为 32-36° SR, 白度为 35-45%ISO。
所述的未漂草浆的制备方法包括蒸煮、洗涤和氧脱木素步骤, 其中所述的蒸煮包括: 以 禾草类植物为原料经过蒸煮后得到硬度为高锰酸钾值 16-28, 叩解度为 10-24° SR的高硬度 浆; 优选所述的未漂草浆以禾草类植物为原料经过蒸煮后得到硬度为高锰酸钾值 16-23, 打 浆度为 10-24° SR的高硬度浆。
所述的未漂草浆的制备包括蒸煮、 洗涤和氧脱木素的步骤, 其中所述的氧脱木素包括: 将蒸煮之后得到硬度为高锰酸钾值 16-28的高硬度浆泵送至氧脱木素反应塔,并加入氢氧化 钠和氧气; 该高硬度浆在该氧脱木素反应塔内进行脱木素反应, 得到硬度为高锰酸钾值 10 - 14的浆;
优选所述的氧脱木素为单段氧脱木素,在氧脱木素反应塔中进行;所述的高硬度浆在该 反应塔进口处的温度为 95— 100°C, 压力为 0.9— 1.2MPa; 出口处的温度为 100— 105°C, 压 力为 0.2— 0.6MPa; 所述的氧脱木素处理中用碱量为以氢氧化钠计对绝干浆量的 2-4%, 氧 气的加入量为 20— 40kg每吨绝干浆; 所述的高硬度浆在该反应塔内的反应时间为 60— 90 分钟。 所述的蒸煮包括: 包括亚硫酸铵法蒸煮、 蒽醌-烧碱法蒸煮、 硫酸盐法蒸煮或者碱性亚 钠法蒸煮中的一种:
亚硫酸铵法蒸煮时, 亚硫酸铵的用量为对绝干原料量的 9-13%;
蒽醌-烧碱法蒸煮时, 用碱量为以氢氧化钠计对绝干原料量 9-15%;
硫酸盐法蒸煮时, 用碱量为氢氧化钠计对绝干原料量 8-11%;
碱性亚钠法蒸煮时,氢氧化钠用量以绝干原料重量计为 11一 15%,亚硫酸钠用量为绝干 原料重量的 2— 6%
所述的洗涤包括:
( 1 ) 将浓度为 8-15%的所述高硬度浆从挤浆机的入口进入, 在挤压力的作用下挤出黑 液, 得到浓度为 18-25%的挤浆后的浆料; 所述的挤浆机优选为变径的单螺旋挤浆机、 双螺 旋挤浆机或者双辊挤浆机;
(2)将挤浆后的浆料用温度 70-80°C下浓度为 3-6.2° Be ' 并且 pH8-8.3的黑液或者用温 度 70-80'C清水中的一种或者两种进行洗涤, 所述的洗涤在真空洗浆机、 压力洗浆机或水平 带式洗浆机中进行。
为了清楚的说明本发明的内容和技术方案, 以下对本发明所使用的一些名词作如下定 义, 在其他任何文献和本发明所做的定义不一致的情形下, 以本发明所做的定义为准, 具体 如下:
本发明所述的未漂草浆是指采用一年生植物, 包括但不仅仅限于麦草、稻草、棉杆、 甘 蔗渣、 芦竹、 芦苇等, 将它们的一种或多种的组合原料完全未经过任何漂白所得到的草浆 或者是指以禾草类植物为原料制备的经过氧脱木素但未经过其它漂白所得到的草浆。
本发明所述的本色纸制品是指主要使用以禾草类植物为原料制备的完全未经过任何漂 白所得到的草浆经过传统方法制备的纸制品;或者是指主要使用以禾草类植物为原料制备的 经过氧脱木素但未经过其它漂白所得到的草浆经过传统方法制备的纸制品。
在本发明未漂草浆的制备方法中,首先可以采用现有技术对草类原料进行备料, 即采用 常规的干、 湿法备料, 以除去叶、 穗、 谷粒、 髓、 麦粒等杂质, 这样可以减轻后续工艺的压 力, 并提高麦草浆的质量。干、湿法备料可采用现有常规设备, 如切草机、筛选机、 除尘机、 湿法洗涤搓草机、斜螺旋脱水机等。经过备料后的去除水分的禾草原料也可以为精料, 扣除 禾草原料的水分为绝干草, 一般草片的长度在 15-30 原料的备料工艺为本领域技术人 员公知技术。
在本发明中的备料过程中, 也可以利用锤式破碎机进行干法备料, 包括以下步骤: ( 1 ) 将禾草类原料利用锤式破碎机进行切断搓揉处理, 得到切断搓揉后的原料; 该步骤中禾草类原料至锤式破碎机中,所述的锤式破碎机包括输送喂料段、破碎及搓揉 段和打散排出段。禾草类原料受到挤压作用,横截面为圆形的禾草类原料被压扁,使叶、芒、 麦粒、 谷粒、 髓等杂质与秸秆分离, 禾草类原料从锤式破碎机的出口排出。 所排出的禾草类 原料的长度为 20-50mm。
本发明中的锤式破碎机为现有备料用的锤式粉碎机。 所述的锤式破碎机的转速为 500-800rpm,禾草类原料进入锤式破碎机的速度为 0.5-1.3m/s,转速过低或者进料过快的话, 会导致一些禾草类原料不能被完全搓揉, 影响之后蒸煮药液的渗透, 进而影响纸浆的质量。
禾草类原料外层有一层蜡质, 且其杆内部有一层髓, 在一般的备料方法中, 当外层被蒸 煮药液浸渍时, 蜡很快就能除去, 但是由于其杆的内层有空气, 因此蒸煮药液很难进入。 将 禾草类原料利用锤式破碎机进行切断和搓揉之后,有利于禾草原料的充分浸渍,蒸煮后容易 得到质量好的草浆。
(2) 将切断破碎后的原料进行除尘处理;
经过切断破碎后的原料进行除尘处理, 这是由于切断后的草片中含有尘土、 砂石、 草 叶、 草穗等杂质, 经过除尘处理, 上述杂质大部分被除去, 因此在备料后的蒸煮过程中, 可 以减少蒸煮时的化学药品消耗, 蒸煮的时间也会相应的缩短。
本发明中进行除尘处理所采用的除尘机可以为现有技术中禾草类原料备料所用的除尘 机, 包括辊式除尘机、 双圆锥除尘机和旋风除尘机, 优选所述的除尘机为旋风除尘机。 在旋 风除尘器中进行除尘处理时风量为 30000-38000m3/h,风压 210mm水柱。在这样的条件下能 大量除去禾草原料中所含的灰尘, 从而减轻后续蒸煮的负担。
( 3 ) 将经过除尘处理的原料进行筛选处理。
禾草类原料经过除尘处理后, 往往带有粗大草片和碎末等杂物, 在蒸煮过程中, 这些杂 物有的不易为蒸煮药液所渗透, 以致产生未蒸解物; 有的碎末虽然与蒸煮液反应, 但是使黑 液粘度增加, 影响蒸煮药液的循环, 致使蒸煮不均, 引起操作困难, 影响纸浆黑液提取的量 和浆的洗净度, 因此筛选处理这一步骤是禾草类原料干法备料中十分重要的步骤。
本发明所述的圆筒筛为现有技术中用于禾草类原料干法备料的圆筒筛。所述圆筒筛的转 速为 18-29r/min, 倾斜角为 6-12°, 本发明所述的圆筒筛为双层圆筒筛, 圆筒筛的里层筛板 正方形筛孔的边长为 30-40mm,外层筛板筛孔的直径 4-6mm,在这个筛选处理的过程中,大的 草片以及其他细小的杂质如泥沙、 尘土等被筛选出来, 保证了之后纸浆的干净。
本发明的干法备料方法后, 禾草原料的除杂率达到 90%以上, 而一般的方法进行干法备 料的除杂率是 70%, 这样不仅可减少浆中的尘埃, 使得所制备的浆干净, 得率高, 得率比一 般的方法提高 3-6%, 用本发明的方法生产成本降低 2-5%。
本发明的方法中可以在蒸煮之前对原料进行浸渍处理, 将浸渍液浸渍麦草原料, 使液 比达到 1 : 2-4,在常压下于 85 °C以上于螺旋浸渍器中保温和混合 10分钟以上,其中在 85-95 °C之间保温混合 10-40分钟为好。这样使浸渍液与麦草原料充分接触,使麦草原料的浸渍均 勾完全。所述的浸渍液可以为一定浓度的碱溶液,如用碱量为以氢氧化钠计对绝干原料量的 4%的碱溶液,也可以是上述碱溶液与黑液的混合液,所用黑液的浓度为 11-14 ° Be ' (20 °C )。 对原料进行了浸渍处理,使黑液的温度和残碱得到了循环再利用,减少了能源和资源的消耗, 由于对原料浸渍预处理, 使得在加热处理时所脱出的杂细胞、半纤维素、木素为主的黑液分 离排出, 为下一步的蒸煮做好准备。所述的对原料进行浸渍处理的过程属于预处理过程, 其 主要目的在于为了之后蒸煮过程中有利于脱木素的反应。
禾草类制浆就是利用蒸煮药液的作用, 适当地去除禾草类原料中的木素, 尽可能保留 纤维素和半纤维素以利于抄纸。实际上在蒸煮过程中由于高温的作用, 原料中的木素、纤维 素、半纤维素以及其它成分均会发生一定的化学变化, 受到不同程度的降解和损伤, 因此必 须研究原料在蒸煮过程中的变化规律, 制定适宜的蒸煮条件。本发明的制浆方法中, 通过对 蒸煮液的用量和浓度, 蒸煮及保温时间的长短, 蒸煮温度的高低进行系统的研究, 在尽可能 的减少纤维素和半纤维素损害的条件下进行蒸煮, 从而达到既减少生产成本, 节约能源, 又 能提高制浆的得率的目的。
本发明的方法中经过蒸煮之后得到高硬度浆,所述高硬度浆的硬度为高锰酸钾值 16-28 相当于卡伯价 24-50, 打浆度为 10-24 ° SR ; 优选所述高硬度浆的硬度为高锰酸钾值 18-27 相当于卡伯价 29-48 ; 所述的高硬度浆最优选硬度为高锰酸钾值 20-25相当于卡伯价 34-42。
本发明中的蒸煮制备的高硬度浆作为制备未漂浆的原料。 在现有技术的蒸煮的制备方 法中, 存在蒸煮和保温的时间长, 蒸煮的温度高, 蒸煮药液用量大, 保温时间长的问题。 而 在本发明的方法中,蒸煮药液的用量少,蒸煮和保温的时间大大缩短。本发明的蒸煮方法中, 通过对蒸煮液的用量和浓度, 蒸煮及保温时间的长短, 蒸煮温度的高低进行系统的研究, 在 尽可能的减少纤维素和半纤维素损害的条件下进行蒸煮,从而达到既减少生产成本,节约能 源, 又能提高制浆的得率的目的。 所述的蒸煮方法所得到的高硬度浆的收率为 58-68%。
在本发明的方法中, 在蒸煮结束之后, 将所得的高硬度浆保持一定的压力稀释后喷放 至喷放锅中, 所述的压力为 0.75MPa。稀释液可以为前述浸渍处理所用的黑液。 此时喷放锅 内的高硬度浆的浓度为 8- 15%, 硬度为高锰酸钾值 16-28相当于卡伯价 26-50, 喷放锅与螺 旋挤浆机之间通过输送泵相连接, 输送泵将喷放锅中的高硬度浆输送到螺旋挤浆机的入口, 高硬度浆从螺旋挤浆机的入口进入, 经过挤浆之后, 上述高硬度浆从挤浆机的出口送出, 送 出的浆料的浓度由 8- 15%提高到 20-28%, 变成了高浓度的高硬度浆, 温度为 70-80°C。在挤 浆的同时,大部分黑液被挤出后在黑液槽中贮存。所选用的挤浆机为现有技术中提取黑液用 的螺旋挤浆机, 优选为变径变螺距的单螺旋挤浆机或者双螺旋挤浆机以及双辊挤浆机。
使用挤浆机进行挤浆时, 由于在挤浆的过程会产生很大的挤压力, 温度迅速上升, 促使 纤维分离、 分丝、 帚化、 压溃, 初生壁遭到破坏, 纤维吸收足够能量, 使纤维内部产生很大 的应力, 高硬度浆的反应性能得到很大提高。 同时, 纤维产生细纤维化, 表皮有机物及纤维 间杂质溶解到蒸煮黑液中, 通过出液槽排出, 纤维纯度得到极大提高。黑液中的一些灰分和 杂质也随着黑液被排出,为下一步的工序做好了充分的准备。本发明中最优选的挤浆机为螺 旋变径的挤浆机, 利用变径挤浆机, 使浆料在缓慢变小的空间里, 使被压缩的浆层里外脱水 一致。本发明所选用的单螺旋变径挤浆机, 在对高硬度浆进行挤浆后, 所述的高硬度浆的叩 解度变化不大。
在进行挤浆时,也可以采用双辊挤浆机,双辊挤浆机的使用,也能和单螺旋挤浆机一样, 最大限度地减少纤维的损伤,而且由于所述双辊挤浆机的黑液提取率高, 因此使得后续的洗 涤过程中耗水量大大减少,耗水量大大少于单螺旋挤浆机,经过挤浆之后高硬度浆的浓度达 到 20%以上, 最高能达到 25%。
本发明的方法中,在进行高硬度浆的洗涤时,一般先将蒸煮之后所得到的高硬度浆或者 挤浆之后所得到的高浓度高硬度浆进行稀释,用浓度为 11-14 ° Be ' (20°C )的黑液稀释至浓 度为 2.5-3.5%,再经过现有技术的筛选方法如跳筛筛选法进行筛选,筛选中损失为 0.2-0.5%。 接下来进行洗涤,可采用现有技术中的真空洗浆机或者压力洗涤机进行洗涤。采用真空洗浆 机的目的是更容易形成在洗涤过程中的纤维细胞内外的压强差,这样更有利于在洗涤过程中 达到高的洗净度。 为了达到更高的洗净度, 洗涤的次数可以为一次, 也可以为两次或三次。
本发明的方法中, 在进行洗浆之后, 浆的浓度在 9- 11%之间, 可以将此浆经过螺旋输送 机送到疏解机进行疏解处理, 处理后浆的打浆度在 26— 28° SR, 湿重 1.5— 1.7g, 温度 65-70 °C。 所述的疏解机为现有的疏解设备, 如高频疏解机, 盘磨机或纤维分离机。 通过疏解, 可 以将纤维搓开, 纤维与纤维之间的木质素被裸露出来, 有利于后面的氧脱木素步骤的进行。
将蒸煮之后得到的高硬度浆或者疏解之后所得的浆或者洗浆之后所得的浆进行氧脱木 素, 所述的氧脱木素为: 用碱量为以氢氧化钠计对绝干浆量的 2-4%, 氧气的加入量为 20— 40kg每吨浆的条件下漂白 60— 90分钟。 此时浆的硬度 k值 (高锰酸钾值) 降低到 11-13相 当于卡伯价 12.5-17,打浆度为 32-36° SR。本发明优选所述的氧脱木素处理为单段氧脱木素, 使用一个氧脱木素反应塔, 高硬度浆在该反应塔进口处的温度为 90— 100°C, 压力为 0.9— 1.2MPa, 出口处的温度为 95— 105 °C, 压力为 0.2— 0.4MPa。 采用单段氧脱木素主要是为了 进一步保证纸浆的强度, 相对多段氧脱木素来说, 单段氧脱木素对纤维素的降解作用较小。 本发明优选的单段氧脱木素的工艺参数总的来说温度较低,相对来说时间较长,主要是为了 更加温和的进行脱木素反应,尽量避免对纤维素的降解。本发明优选高硬度浆在进行氧脱木 素处理前的浓度为 8— 18 %。 在中浓条件下进行氧脱木素。 中浓氧脱木素的主要优点是: 投 资较少; 由于中浓混合和泵送技术的成功, 浆料的处理比高浓容易得多; 浆料浓度较低, 设 备的腐蚀少, 也没有在氧气中燃烧的危险。
经过上述步骤所得到的未漂草浆, 其裂断长为 5.0-7.5km, 撕裂度为 230-280mN, 白度 为 25-45%ISO, 耐折次数为 40-90次, 打浆度为 32-38 ° SR。
本发明的有益之处在于:
( 1 ) 未漂浆能够避免漂白过程中所使用的化学品对人体可能的伤害, 使得所制备的本 色纸制品产品中不可能含有二噁英和可吸附有机卤化物等致癌物质, 因此对人体无伤害。
(2) 未漂草浆可以降低漂白过程对裂断长、 撕裂度和耐折次数的影响, 而且由于制备 方法的不同, 使得所制备的草浆性能十分优异, 可以大大提高本色纸制品的质量。
( 3 ) 本发明中以草浆为原料制备的本色纸制品中, 不需要加入荧光增白剂, 使得所制 备的纸制品不会受到这类物质的二次污染, 保持纸制品原有的性质, 对身体不会造成伤害。
(4) 由于本发明中未漂草浆制备方法的改进, 使得所制备的草浆强度以及各方面的性 能都得到了很大的很高, 因此它可以与少量木浆或其它造纸用浆料混合使用制备纸制品,甚 至可以由草浆直接抄造制备成高质量的纸制品。 具体实施方式 实施例 1
将麦草原料采用锤式破碎机进行备料之后装入蒸球中,往蒸球中加入蒸煮药液,亚硫酸 铵加入量为绝干原料量的 9 %, 液比 1 : 3, 第一次加热升温至 110°C, 在此温度下保温 30 分钟, 再小放汽 25分钟, 二次加热升温 60分钟至温度为 168°C, 保温 90分钟。 蒸煮之后 所得到的高硬度浆的硬度为 22相当于卡伯价 35.5, 打浆度为 11.6° SR, 用稀黑液稀释至浓 度为 2.5%, 再经过现有技术的筛选方法如跳筛筛选法进行筛选, 筛选中损失为 0.5%。 再采 用现有技术中真空洗浆机洗涤。 洗涤之后得到浓度为 10 %的高硬度浆, 输送到中浓浆管。 经中浓浆泵输送到氧脱木素反应塔。 该浆在进入反应塔之前在管路中与加入的 20kg每吨浆 的氧气和对绝干浆量以氢氧化钠计 4%的碱溶液混合,并在管路中通入蒸汽将该浆加热升温。 之后该浆在混合器中经过充分混合后进入氧脱木素反应塔,保护剂为硫酸镁,加入量为绝干 浆量的 1 %, 进口温度 95°C, 压力 0.9Mpa, 停留 75分钟使该浆能进行充分的脱木素反应, 塔顶温度为 100°C, 压力保持为 0.3MPa。 处理完成后将该浆喷放到浆池并稀释, 得到所述 的未漂浆。 所述的未漂草浆的裂断长为 5.0km, 耐折度为 40次, 撕裂度为 220mN, 白度为 40%ISO, 打浆度为 34° SR。 将上述未漂草浆进行打浆, 将上述未漂草浆进行打浆, 打浆度 33° SR, 打浆湿重为 2.1g, 另配未漂木浆打浆度 20 ° SR, 打浆湿重为 12g。
将重量份 65%上述未漂草浆与 35%的未漂木浆打浆后的浆料混合均勾后进行抄造, 得 到所述的本色胶版印刷纸。 所述的本色胶版印刷纸定量为 69.0g/m2, 不透明度 85%, 裂断 长为 3.9km, 白度为 49%ISO, 横向耐折度为 19次, 撕裂度为 258mN。
实施例 2
将稻草原料利用锤式破碎机进行干法备料之后,装入间歇式球形蒸煮器中,往间歇式球 形蒸煮器中加入蒸煮药液, 亚硫酸铵加入量为绝干原料量的 13%, 液比 1 : 4, 第一次加热 升温至 120°C, 在此温度下保温 40分钟, 再小放汽 25分钟, 二次加热升温 60分钟至温度 为 168°C, 保温 90分钟。蒸煮之后所得到的高硬度浆的硬度为 16相当于卡伯价 23, 打浆度 为 23.4° SR, 用稀黑液稀释至浓度为 2.5%, 再经过现有技术的筛选方法如跳筛筛选法进行 筛选, 筛选中损失为 0.2%。 再采用现有技术中真空洗浆机洗涤。 洗涤之后得到浓度为 10 % 的高硬度浆, 然后通过螺旋输送机加热该浆至 70°C并输送到中浓浆管。 该浆在中浓浆管中 先经过调质处理排除浆内的空气使之流态化, 后经离心式中浓浆泵输送到氧脱木素反应塔。 该浆在进入反应塔之前在管路中与加入的 20kg每吨浆的氧气和含碱量为以氢氧化钠计对绝 干浆量 3.5%的碱溶液混合, 并在管路中通入蒸汽将该浆加热升温。 之后该浆在混合器中经 过充分混合后进入氧脱木素反应塔, 保护剂为硫酸镁, 加入量为绝干浆量的 1 %, 进口温度 95°C, 压力 0.9Mpa, 停留 75分钟使该浆能进行充分的脱木素反应, 塔顶温度为 100°C, 压 力保持为 0.4MPa。 处理完成后将该浆喷放到浆池并稀释, 得到所述的未漂浆。 所述的未漂 浆的裂断长为 6.8km, 耐折度为 50次, 撕裂度为 250 mN, 白度为 41%ISO, 打浆度为 36° 将重量份 70%上述未漂草浆与 30%的未漂木浆分别进行打浆, 草浆打浆浓度 3.0%, 木 浆打浆浓度 4.5%, 打浆在双圆盘磨浆机种进行, 打浆之后所得到的成浆质量标准为: 草浆 打浆度 34° SR, 打浆湿重为 1.8g, 木浆打浆度 22 ° SR, 打浆湿重为 10 g。 所述未漂木浆为 现有技术的未漂木浆, 其裂断长为 6.5km, 撕裂度为 1000mN, 白度为 18%ISO, 耐折次数 为 1000次。
将打浆后的浆料均勾混合后进行抄造,得到所述的本色胶版印刷纸。所述的抄造包括将 上述打浆后所得到的成浆进行抄造, 所述的抄造在长网多缸纸机中进行。
所述的本色胶版印刷纸定量为 70.0g/m2, 不透明度 84%, 裂断长为 4.9km, 白度为 52%ISO, 横向耐折度为 22次, 撕裂度为 229mN。
实施例 3
将甘蔗渣原料经过干法常规备料且进行去髓后装入蒸球中,往蒸球中加入蒸煮药液,亚 硫酸铵加入量为绝干原料量的 11 %, 液比 1 : 2.5, 第一次加热升温至 130°C, 在此温度下保 温 20分钟, 再小放汽 20分钟, 二次加热升温 50分钟至温度为 165°C, 保温 70分钟。 蒸煮 得到硬度为 21相当于卡伯价 32的高硬度浆, 打浆度为 14.2° SR, 然后将高硬度浆送入现 有技术中提取黑液用的双螺旋挤浆机进行挤浆, 挤浆之后得到浓度为 25 %的高硬度浆, 再 经黑液稀释至 2.5%后送到真空洗浆机的洗涤, 浆浓度在 10-13%然后将所得的浆通过螺旋输 送机加热该浆至 70°C并输送到中浓浆管。 该浆在中浓浆管中先经过调质处理排除浆内的空 气使之流态化,后经离心式中浓浆泵输送到氧脱木素反应塔。该浆在进入反应塔之前在管路 中与加入的 30kg每吨浆的氧气和含碱量为以氢氧化钠计对绝干浆重量 3 %的碱溶液混合, 并在管路中通入蒸汽将该浆加热升温。之后该浆在混合器中经过充分混合后进入氧脱木素反 应塔, 保护剂为硫酸镁, 加入量为绝干浆重量的 0.8 %, 进口温度 98°C, 压力 1.05Mpa, 停 留 85分钟使该浆能进行充分的脱木素反应, 塔顶温度为 102 °C, 压力保持为 0.4MPa。 处理 完成后将该浆喷放到浆池并稀释, 得到所述的未漂草浆。 所述的未漂浆的裂断长为 6.0km, 耐折度为 70次, 撕裂度为 230m , 白度为 40%ISO, 打浆度为 35° SR。
将重量份 85%上述未漂草浆与 15%的未漂木浆分别进行打浆, 草浆打浆浓度 3.2%, 木 浆打浆浓度 4.0%, 打浆在双柱型精浆机中进行, 打浆之后所得到的成浆质量标准为: 草浆 打浆浓度 3.2%, 木浆打浆浓度 4.0%, 草浆打浆度 33° SR, 打浆湿重为 2.0g, 木浆打浆度 18
° SR, 打浆湿重为 l lg。将打浆后的浆料均勾混合后进行抄造, 得到所述的本色胶版印刷纸。 所述的抄造在短长网多缸纸机中进行。
所述的本色胶版印刷纸定量为 65.0g/m2, 不透明 85%, 裂断长为 5.5km, 白度为 48%ISO, 横向耐折度为 28次, 撕裂度为 230mN。
实施例 4
将芦竹用锤式破碎机进行备料之后装入蒸球中,往蒸球中加入蒸煮药液,亚硫酸铵加入 量为绝干原料量的 11 %, 液比 1 : 3, 第一次加热升温至 140°C, 在此温度下保温 40分钟, 再小放汽 20分钟, 二次加热升温 60分钟至温度为 175°C, 保温 90分钟。 蒸煮后得到硬度 为 19相当于卡伯价 28.5,打浆度为 15.6° SR的高硬度浆,然后将高硬度浆送入现有技术中 提取黑液用的变径单螺旋挤浆机进行挤浆, 挤浆之后得到浓度为 26 %的高硬度浆, 从挤浆 机中出来的浆料用稀黑液稀释至浆的浓度至 2.5-3.0%, 送到跳筛进行粗浆筛选, 跳筛损失为 0.2%, 又通过高浓度除渣器除去杂质, 损失 0.1%, 再将除渣后得到的浆进入水平带式洗浆 机进行洗涤, 洗涤时的浆浓度为 2.0%, 从洗浆机中出来的浆浓度为 9%, 洗涤过程中保持 70°C, 再将其输送到疏解机中进行疏解, 疏解前的芦竹浆的叩解度为 24 ° SR, 疏解后的芦竹 浆的叩解度为 27 ° SR, 调浓至 10%后通过螺旋输送机加热该浆至 70°C并输送到中浓浆管。 该浆在中浓浆管中先经过调质处理排除浆内的空气使之流态化,后经离心式中浓浆泵输送到 氧脱木素反应塔。 该浆在进入反应塔之前在管路中与加入的 30kg每吨浆的氧气和用碱量为 以氢氧化钠计对绝干浆量 4 %碱溶液混合, 并在管路中通入蒸汽将该浆加热升温。 之后该浆 在混合器中经过充分混合后进入氧脱木素反应塔,保护剂为硫酸镁,加入量为绝干浆重量的 1 % , 进口温度 102°C, 压力 1.2Mpa, 停留 90分钟使该浆能进行充分的脱木素反应, 塔顶 温度为 105°C, 压力保持为 0.5MPa。 处理完成后将该浆喷放到浆池并稀释, 得到所述的未 漂浆。所述的未漂浆的裂断长为 7.5km,耐折度为 80次,撕裂度为 280mN, 白度为 37%ISO, 打浆度为 33° SR。
将重量份 50%上述未漂草浆与 50%的未漂木浆进行配制, 两种浆分别进行打浆, 先在 圆柱精浆机种进行打浆, 其打浆浓度为 3.8%, 打浆压力为 0.20MPa, 打浆电流为 62A; 然 后在双圆盘磨浆机种进行打浆, 其打浆浓度为 3.4%, 打浆度 35 ° SR, 打浆湿重为 2.2g, 木 浆打浆浓度 4.5%,打浆度 19° SR, 湿重 12g。 所述的未漂木浆为现有技术的未漂木浆。
将打浆后的浆料进行抄造,得到所述的本色食品包装纸。所述的抄造包括将上述打浆后 所得到的成浆进行抄造,所述的抄造在单圆网单烘缸单毛毯卫生纸机中进行,经过抄造之后 得到本发明所述的本色食品包装纸。所述的本色食品包装纸定量为 60.0g/m2, 厚度为 79.0 m, 平滑度正面为 47S, 反面为 39S, 白度为 20%ISO, 不透明度为 97.6%, 裂断长为 6.8km, 横向耐折度为 150次, 横向撕裂度为 600m N , 水分含量为 5.2%。
实施例 5
将芦竹与芦苇按质量比为 1 : 4利用锤式破碎机进行备料后, 由温度为 135°C的热黑液 通过装锅器装入蒸煮锅中, 液比 1 : 7, 当装满后关闭锅盖, 往蒸煮锅中加入温度为 145°C蒸 煮药剂, 用碱量为以氢氧化钠计对绝干原料量的 13 %, 蒽醌加入量为绝干原料量的 0.5%, 将装锅黑液和空气排出并升压至 0.6MPa, 开启蒸煮锅的蒸煮液循环泵和列管加热器为蒸煮 液加热到 155°C, 升温和保温 160分钟。 用稀黑液将热黑液置换出, 送至热黑液罐, 蒸煮后 的得到硬度为 20相当于卡伯价 30的高硬度浆,打浆度 15° SR,调节高硬度浆的浓度至 18%, 后输送到盘磨机中进行疏解,再经过常规的洗涤方法进行洗涤,之后通过螺旋输送机加热该 浆至 70°C并输送到中浓浆管。 该浆在中浓浆管中先经过调质处理排除浆内的空气使之流态 化,后经离心式中浓浆泵输送到氧脱木素反应塔。该浆在进入反应塔之前在管路中与加入的 35kg每吨浆的氧气和含碱量为以氢氧化钠计对绝干浆量的 2.5 %的碱溶液混合, 并在管路中 通入蒸汽将该浆加热升温。之后该浆在混合器中经过充分混合后进入氧脱木素反应塔,保护 剂为硫酸镁, 加入量为绝干浆重量的 1%, 进口温度 100°C, 压力 1.2Mpa, 停留 80分钟使 该浆能进行充分的脱木素反应, 塔顶温度为 105°C, 压力保持为 0.4MPa。 处理完成后将该 浆喷放到浆池并稀释, 得到所述的未漂浆。 所述的未漂浆的裂断长为 7.0km, 耐折度为 60 次, 撕裂度为 240mN, 白度为 37%ISO, 打浆度为 37° SR。
将重量份 60%上述未漂草浆与 40%的未漂木浆进行配制, 两种浆分别进行打浆, 先在圆柱精浆机种进行打浆, 其打浆浓度为 3.8%, 打浆压力为 0.20MPa, 打浆电流为 65A; 然后在双圆盘磨浆机种进行打浆, 其打浆浓度为 3.3%, 打浆压力为 0.15MPa, 打浆电 流为 45A, 打浆之后所得到的成浆质量标准为: 打浆度 48° SR, 打浆湿重为 2.8g。 所述的未 漂木浆为现有技术的未漂木浆, 裂断长为 7km, 撕裂度为 1000mN, 白度为 20%ISO, 耐折 次数为 1000次以上。 未漂草浆打浆度 36° SR, 湿重 2.3g, 未漂木浆打浆度 20 ° SR, 湿重 12g。
将打浆后的浆料混合均勾后进行抄造, 得到所述的本色食品包装纸。
所述的本色食品包装纸定量为 45g/m2,厚度为 79.0 μ m,平滑度正面为 45S,反面为 36S, 白度为 45%ISO, 不透明度为 97.6%, 裂断长为 5.8km, 横向耐折度为 170次, 横向撕裂 度为 550m N , 水分含量为 5.3%。
实施例 6
将利用锤式破碎机进行备料后的芦苇装入蒸球中,往蒸球中加入蒸煮药液,用碱量为以 氢氧化钠计对绝干原料量的 9%, 蒽醌加入量为 0.8%, 液比 1 : 4, 第一次加热升温至 110 V , 在此温度下保温 40分钟, 再小放汽 30分钟, 二次加热升温 50分钟至温度为 173 °C, 保温 60分钟。 蒸煮后得到硬度为 20相当于卡伯价 30.7, 打浆度位 12.5 ° SR的高硬度浆, 然后将高硬度浆送入现有技术中提取黑液用的变径单螺旋挤浆机进行挤浆,挤浆之后得到浓 度为 20 %的高硬度浆, 再用常规的洗涤方法如压力洗涤机进行洗涤, 后输送到盘磨疏解机 中进行疏解, 然后通过螺旋输送机加热该浆至 70°C并输送到中浓浆管。 该浆在中浓浆管中 先经过调质处理排除浆内的空气使之流态化, 后经离心式中浓浆泵输送到氧脱木素反应塔。 该浆在进入反应塔之前在管路中与加入的 20kg每吨浆的氧气和含碱量为以氢氧化钠计对绝 干浆重量 4%碱溶液混合, 并在管路中通入蒸汽将该浆加热升温。 之后该浆在混合器中经过 充分混合后进入氧脱木素反应塔, 保护剂为硫酸镁, 加入量为绝干浆重量的 1 %, 进口温度 95°C, 压力 0.9Mpa, 停留 70分钟使该浆能进行充分的脱木素反应, 塔顶温度为 100°C, 压 力保持为 0.3MPa。 处理完成后将该浆喷放到浆池并稀释, 得到所述的未漂浆。 所述的未漂 浆的裂断长为 5.8km,耐折度为 55次,撕裂度为 260mN, 白度为 40%ISO,打浆度为 38° SR。 将重量份 55%上述未漂草浆与 45%的未漂木浆分别进行打浆, 苇浆打浆浓度 3.5%,木 浆打浆浓度 4.5%, 打浆在双盘磨浆机中进行, 打浆之后所得到的成浆质量标准为: 苇浆打 浆度 35° SR, 打浆湿重为 2.0g, 木浆打浆度 20° SR, 打浆湿重为 12 g。 所述的未漂木浆为现 有技术的未漂硫酸盐针叶木浆, 其裂断长为 5.0km, 撕裂度为 1100mN, 白度为 18%IS0, 耐折次数为 1000次以上, 打浆度为 39° SR。
将打浆后的浆料进行抄造,得到所述的本色食品包装纸。所述的本色食品包装纸定量为 51.5g/m2, 厚度为 75.0 μ πι, 平滑度正面为 48S, 反面为 36S, 白度为 40%ISO, 不透明 度为 96.8%, 裂断长为 3.2km, 横向耐折度为 140次, 横向撕裂度为 380m N , 水分含 量为 5.8%。
实施例 7
将经过锤式破碎机进行备料后的棉秆装入蒸球中,往蒸球中加入蒸煮药液,用碱量为以 氢氧化钠计对绝干原料量的 8 %, 硫化度为 8%, 液比 1 : 2, 第一次加热升温至 110°C, 在 此温度下保温 40分钟, 再小放汽 25分钟, 二次加热升温 45分钟至温度为 166°C, 保温 75 分钟。 蒸煮后得到硬度为 22相当于卡伯价 35, 打浆度为 11.6° SR的高硬度浆, 输送到高 频疏解机中进行疏解, 然后将高硬度浆送入现有技术中提取黑液用的双辊挤浆机进行挤浆, 挤浆之后得到浓度为 32 %的高硬度浆, 再用稀黑液调节浓度至 2.5%, 经除渣后再经过常规 的洗涤方法进行洗涤, 出洗浆的浆浓调节至 15%., 然后通过螺旋输送机加热该浆至 70°C并 输送到中浓浆管。该浆在中浓浆管中先经过调质处理排除浆内的空气使之流态化,后经离心 式中浓浆泵输送到氧脱木素反应塔。 该浆在进入反应塔之前在管路中与加入的 20kg每吨浆 的氧气和含碱量为以氢氧化钠计对绝干浆重量 3 %的碱溶液混合, 并在管路中通入蒸汽将该 浆加热升温。 之后该浆在混合器中经过充分混合后进入氧脱木素反应塔, 保护剂为硫酸镁, 加入量为绝干浆重量的 1 %, 进口温度 95°C, 压力 0.9Mpa, 停留 90分钟使该浆能进行充分 的脱木素反应, 塔顶温度为 100°C, 压力保持为 0.4MPa。 处理完成后将该浆喷放到浆池并 稀释,得到所述的未漂浆。所述的未漂浆的裂断长为 4.3km,耐折度为 70次,撕裂度为 275m , 白度为 42%ISO, 打浆度为 34° SR。
将重量份 80%上述未漂草浆与 20%的未漂木浆分别进行打浆, 棉秆打浆浓度 3.5%, 木 浆打浆浓度 4.5%, 打浆在双盘磨浆机中进行, 打浆之后所得到的成浆质量标准为: 苇浆打 浆度 55° SR, 打浆湿重为 2.0g, 木浆打浆度 48 ° SR, 打浆湿重为 2.6 g。 所述的未漂木浆为 现有技术的未漂硫酸盐针叶木浆, 其裂断长为 5.0km, 撕裂度为 1100mN, 白度为 18%IS0, 耐折次数为 1000次以上, 打浆度为 39° SR。 将打浆后的浆料进行抄造, 得到所述的本色复印纸。 所述的本色复印纸定量为 60.0g/m2, 纵横向平均裂断长为 4.5km, 纵向挺度为 112m N, 横向挺度为 72m N, 白度 为 44.7% ISO。
实施例 8
将质量比为 1 : 3的稻草与麦草利用锤式破碎机进行干法备料后装入蒸球中, 往蒸球中 加入蒸煮药液, 用碱量为以氢氧化钠计对绝干原料量的 11 %, 硫化度为 5%, 液比 1 : 4, 第 一次加热升温至 110°C, 在此温度下保温 20分钟, 再小放汽 30分钟, 二次加热升温 40分 钟至温度为 168°C, 保温 90分钟。 蒸煮后的得到硬度为 19相当于卡伯价 29的高硬度浆, 打浆度为 14.3 ° SR, 再送至常规的提取黑液用的变径单螺旋挤浆机进行挤浆, 从挤浆机中 出来的浆料用稀黑液稀释至浆的浓度至 3.0%, 送到跳筛进行粗浆筛选, 跳筛损失为 0.2%, 又通过高浓度除渣器除去杂质, 损失 0.1%, 再将除渣后得到的浆进入水平带式洗浆机进行 洗漆, 洗涤时的浆浓度为 3.0%, 从洗浆机中出来的浆浓度为 9%, 洗涤过程中保持 70°C, 再将其输送到高频疏解机中进行疏解,浆再通过中浓浆管中先经过调质处理排除浆内的空气 使之流态化,后经离心式中浓浆泵输送到氧脱木素反应塔。该浆在进入反应塔之前在管路中 与加入的 20kg每吨浆的氧气和含碱量为以氢氧化钠计对绝干浆重量 4%的碱溶液混合, 并 在管路中通入蒸汽将该浆加热升温。之后该浆在混合器中经过充分混合后进入氧脱木素反应 塔, 保护剂为硫酸镁, 加入量为绝干浆重量的 1 %, 进口温度 95°C, 压力 0.9Mpa, 停留 75 分钟使该浆能进行充分的脱木素反应, 塔顶温度为 100 °C, 压力保持为 0.3MPa。 处理完成 后将该浆喷放到浆池并稀释, 得到所述的未漂草浆。 所述的未漂草浆的裂断长为 7.2km, 耐 折度为 45次, 撕裂度为 250mN, 白度为 42%ISO, 打浆度为 33° SR。
将重量份 50%上述未漂草浆与 50%的未漂木浆进行配制, 两种浆分别进行打浆, 先在 圆柱精浆机种进行打浆, 其打浆浓度为 3.8%, 打浆压力为 0.20MPa, 打浆电流为 62A; 然 后在双圆盘磨浆机种进行打浆,其打浆浓度为 3.4%,打浆压力为 0.20MPa,打浆电流为 60A, 打浆之后所得到的成浆质量标准为: 打浆度 48° SR, 打浆湿重为 3.2g。 所述的未漂木浆为 现有技术的未漂木浆, 包括未漂硫酸盐针叶木浆、未漂亚硫酸盐针叶木浆等等, 其裂断长为
6.5km, 撕裂度为 1000mN, 白度为 20%ISO, 耐折次数为 1000次以上, 打浆度为 38° SR。
将打浆后的浆料进行抄造, 得到所述的本色复印纸。 所述的本色复印纸定量为 65.0g/m2, 纵横向平均裂断长为 7.5km, 纵向挺度为 82m N, 横向挺度为 55m N, 白度为 41.8%ISO。
实施例 9 将稻草利用锤式破碎机进行干法备料后装入蒸球中,往蒸球中加入蒸煮药液,用碱量以 氢氧化钠计对绝干原料量的 15 %, 液比 1 : 3, 蒽醌加入量为绝干原料量的 0.6%, 第一次加 热升温至 120°C, 在此温度下保温 20分钟, 再小放汽 20-30分钟, 二次加热升温 40分钟至 温度为 168°C, 保温 90分钟。 蒸煮后得到硬度为 18相当于卡伯价 27的高硬度浆, 打浆度 为 17° SR,再送至常规的提取黑液用的变径单螺旋挤浆机进行挤浆,从挤浆机中出来的浆料 用稀黑液稀释至浆的浓度至 2.5%, 送到跳筛进行粗浆筛选, 跳筛损失为 0.2%, 又通过高浓 度除渣器除去杂质, 损失 0.1%, 再将除渣后得到的浆进入水平带式洗浆机进行洗涤, 洗涤 时的浆浓度为 3.0%, 从洗浆机中出来的浆浓度为 9%, 洗涤过程中保持 68-70 °C, 再将其输 送到高频疏解机中进行疏解, 调浓后通过螺旋输送机加热该浆至 70°C并输送到中浓浆管。 该浆在中浓浆管中先经过调质处理排除浆内的空气使之流态化,后经离心式中浓浆泵输送到 氧脱木素反应塔。 该浆在进入反应塔之前在管路中与加入的 20kg每吨浆的氧气和含碱量为 以氢氧化钠计对绝干浆量的 4%的碱溶液, 并在管路中通入蒸汽将该浆加热升温。 之后该浆 在混合器中经过充分混合后进入氧脱木素反应塔,保护剂为硫酸镁,加入量为绝干浆重量的 1 % , 进口温度 102°C, 压力 1.12Mpa, 停留 70分钟使该浆能进行充分的脱木素反应, 塔顶 温度为 104 °C, 压力保持为 0.5MPa。 处理完成后将该浆喷放到浆池并稀释, 得到所述的未 漂浆。所述的未漂浆的裂断长为 4.4km,耐折度为 65次,撕裂度为 245mN, 白度为 37%ISO, 打浆度为 34° SR。
将重量份 70%上述未漂草浆与 30%的未漂木浆分别进行打浆, 草浆打浆浓度 3.2%, 木 浆打浆浓度 4.5%, 打浆在双盘磨浆机中进行, 打浆之后所得到的成浆质量标准为: 草浆打 浆度 55° SR, 打浆湿重为 2.0g, 木浆打浆度 48 ° SR, 打浆湿重为 2.0 g。 所述的未漂木浆为 现有技术的未漂硫酸盐阔叶木浆。
将打浆后的浆料进行抄造, 得到所述的本色复印纸。
所述的本色复印纸定量为 72.0g/m2,纵横向平均裂断长为 6.2km,纵向挺度为 90m N, 横向挺度为 56m N, 白度为 35.0%ISO。
实施例 10
将质量比为 1 : 3的稻草与麦草利用锤式破碎机进行干法备料后装入蒸球中, 往蒸球中 加入蒸煮药液, 用碱量为以氢氧化钠计对绝干原料量的 11 %, 硫化度为 5%, 液比 1 : 4, 第 一次加热升温至 110°C, 在此温度下保温 20分钟, 再小放汽 30分钟, 二次加热升温 40分 钟至温度为 168°C, 保温 90分钟。 蒸煮后的得到硬度为 19相当于卡伯价 29的高硬度浆, 打浆度为 14.3 ° SR, 再送至常规的提取黑液用的变径单螺旋挤浆机进行挤浆, 从挤浆机中 出来的浆料用稀黑液稀释至浆的浓度至 3.0%, 送到跳筛进行粗浆筛选, 跳筛损失为 0.2%, 又通过高浓度除渣器除去杂质, 损失 0.1%, 再将除渣后得到的浆进入水平带式洗浆机进行 洗漆, 洗涤时的浆浓度为 3.0%, 从洗浆机中出来的浆浓度为 9%, 洗涤过程中保持 70°C, 再将其输送到高频疏解机中进行疏解,浆再通过中浓浆管中先经过调质处理排除浆内的空气 使之流态化,后经离心式中浓浆泵输送到氧脱木素反应塔。该浆在进入反应塔之前在管路中 与加入的 20kg每吨浆的氧气和含碱量为以氢氧化钠计对绝干浆重量 4%的碱溶液混合, 并 在管路中通入蒸汽将该浆加热升温。之后该浆在混合器中经过充分混合后进入氧脱木素反应 塔, 保护剂为硫酸镁, 加入量为绝干浆重量的 1 %, 进口温度 95°C, 压力 0.9Mpa, 停留 75 分钟使该浆能进行充分的脱木素反应, 塔顶温度为 100 °C, 压力保持为 0.3MPa。 处理完成 后将该浆喷放到浆池并稀释, 得到所述的未漂草浆。 所述的未漂草浆的裂断长为 7.2km, 耐 折度为 45次, 撕裂度为 250mN, 白度为 42%ISO, 打浆度为 33° SR。
将上述未漂草浆进行打浆, 打浆度 30° SR, 打浆湿重为 2.3g。
将打浆后的浆料均勾混合后进行后处理,得到所述的本色餐盒。所述的后处理为防油剂, 加入量为 U%; 防水剂 3.3%, 定着剂 0.15%, 在真空度 0.055 MP条件下烘干温度 18CTC烘 干时间 75s。 所得到的本色餐盒完全符合 GB 18006.1-1999 A等品的要求。
实施例 11
将稻草利用锤式破碎机进行干法备料后装入蒸球中,往蒸球中加入蒸煮药液,用碱量以 氢氧化钠计对绝干原料量的 15 %, 液比 1 : 3, 蒽醌加入量为绝干原料量的 0.6%, 第一次加 热升温至 120°C, 在此温度下保温 20分钟, 再小放汽 20-30分钟, 二次加热升温 40分钟至 温度为 168°C, 保温 90分钟。 蒸煮后得到硬度为 18相当于卡伯价 27的高硬度浆, 打浆度 为 17° SR,再送至常规的提取黑液用的变径单螺旋挤浆机进行挤浆,从挤浆机中出来的浆料 用稀黑液稀释至浆的浓度至 2.5%, 送到跳筛进行粗浆筛选, 跳筛损失为 0.2%, 又通过高浓 度除渣器除去杂质, 损失 0.1%, 再将除渣后得到的浆进入水平带式洗浆机进行洗涤, 洗涤 时的浆浓度为 3.0%, 从洗浆机中出来的浆浓度为 9%, 洗涤过程中保持 68-70 °C, 再将其输 送到高频疏解机中进行疏解, 调浓后通过螺旋输送机加热该浆至 70°C并输送到中浓浆管。 该浆在中浓浆管中先经过调质处理排除浆内的空气使之流态化,后经离心式中浓浆泵输送到 氧脱木素反应塔。 该浆在进入反应塔之前在管路中与加入的 20kg每吨浆的氧气和含碱量为 以氢氧化钠计对绝干浆量的 4%的碱溶液, 并在管路中通入蒸汽将该浆加热升温。 之后该浆 在混合器中经过充分混合后进入氧脱木素反应塔,保护剂为硫酸镁,加入量为绝干浆重量的 1 % , 进口温度 102°C, 压力 1.12Mpa, 停留 70分钟使该浆能进行充分的脱木素反应, 塔顶 温度为 104 °C, 压力保持为 0.5MPa。 处理完成后将该浆喷放到浆池并稀释, 得到所述的未 漂浆。所述的未漂浆的裂断长为 4.4km,耐折度为 65次,撕裂度为 245mN, 白度为 37%ISO, 打浆度为 34° SR。
将重量份 70%上述未漂草浆与 30%的未漂木浆分别进行打浆, 未漂草浆打浆度 31° SR, 湿重 2.2g, 未漂木浆打浆度 20° SR, 湿重 10g。 .
将打浆后的浆料均勾混合后进行后处理,得到所述的本色餐盒。所述的后处理为防油剂 加入量为 1.1 %; 防水剂 3.3%, 定着剂 0.15%, 在真空度 0.05 MPa条件下烘干温度 178°C烘 干时间 78S。 所得到的本色餐盒完全符合 GB 18006.1-1999 A等品的要求。
实施例 12
将芦竹常规干法备料之后装入蒸球中,往蒸球中加入蒸煮药液,用碱量为以氢氧化钠计 对绝干浆量的 11%, 蒽醌加入量为 0.8%, 液比 1 : 4, 第一次加热升温至 130°C, 在此温度 下保温 40分钟, 再小放汽 30分钟, 二次加热升温 60分钟至温度为 173 °C, 保温 60分钟。 蒸煮后得到硬度为 25相当于卡伯价为 45的高硬度浆, 打浆度为 12° SR, 然后将高硬度浆 送入现有技术中提取黑液用的变径单螺旋挤浆机进行挤浆, 挤浆之后得到浓度为 20 %的高 硬度浆, 送到跳筛进行粗浆筛选, 跳筛损失为 0.2%, 又通过高浓度除渣器除去杂质, 损失 0.1%, 再将除渣后得到的浆进入水平带式洗浆机进行洗涤, 洗涤时的浆浓度为 2.0%, 从洗 浆机中出来的浆浓度为 9%, 洗涤过程中保持 68-70°C, 调浓后通过螺旋输送机加热该浆至 70°C 并输送到中浓浆管。 该浆在中浓浆管中先经过调质处理排除浆内的空气使之流态化, 后经离心式中浓浆泵输送到氧脱木素反应塔。 该浆在进入反应塔之前在管路中与加入的 20kg每吨浆的氧气和用碱量为以氢氧化钠计对绝干浆量 4 %碱溶液混合,并在管路中通入蒸 汽将该浆加热升温。之后该浆在混合器中经过充分混合后进入氧脱木素反应塔,保护剂为硫 酸镁, 加入量为绝干浆重量的 1 %, 进口温度 102°C, 压力 1.12Mpa, 停留 75分钟使该浆能 进行充分的脱木素反应, 塔顶温度为 104 °C, 压力保持为 0.5MPa。 处理完成后将该浆喷放 到浆池并稀释, 得到所述的未漂浆。 所述的未漂浆的裂断长为 5.0km, 耐折度为 69次, 撕 裂度为 255mN, 白度为 42%ISO, 打浆度为 33° SR。
将重量份 70%上述未漂草浆与 30%的未漂木浆进行配制, 两种浆分别进行打浆, 未漂 草浆打浆度 32° SR, 湿重为 2.3g, 未漂木浆打浆度 20° SR, 湿重为 12 g。
将打浆后的浆料均勾混合后进行后处理,得到所述的本色餐盒。所述的后处理为防油剂 加入量为 1.2%; 防水剂 3%, 定着剂 0.15%, 在真空度 0.055 MP条件下烘干温度 175°C烘干 时间 80s。 所得到的本色餐盒完全符合 GB 18006.1-1999 A等品的要求。
实施例 13
将麦草原料采用锤式破碎机进行备料之后装入蒸球中,往蒸球中加入蒸煮药液,亚硫酸 铵加入量为绝干原料量的 9 %, 液比 1 : 3, 第一次加热升温至 110°C, 在此温度下保温 30 分钟, 再小放汽 25分钟, 二次加热升温 60分钟至温度为 168°C, 保温 90分钟。 蒸煮之后 所得到的高硬度浆的硬度为 22相当于卡伯价 35.5, 打浆度为 11.6° SR, 用稀黑液稀释至浓 度为 2.5%, 再经过现有技术的筛选方法如跳筛筛选法进行筛选, 筛选中损失为 0.5%。 再采 用现有技术中真空洗浆机洗涤。 洗涤之后得到浓度为 10 %的高硬度浆, 输送到中浓浆管。 经中浓浆泵输送到氧脱木素反应塔。 该浆在进入反应塔之前在管路中与加入的 20kg每吨浆 的氧气和对绝干浆量以氢氧化钠计 4%的碱溶液混合,并在管路中通入蒸汽将该浆加热升温。 之后该浆在混合器中经过充分混合后进入氧脱木素反应塔,保护剂为硫酸镁,加入量为绝干 浆量的 1 %, 进口温度 95°C, 压力 0.9Mpa, 停留 75分钟使该浆能进行充分的脱木素反应, 塔顶温度为 100°C, 压力保持为 0.3MPa。 处理完成后将该浆喷放到浆池并稀释, 得到所述 的未漂浆。 所述的未漂草浆的裂断长为 5.0km, 耐折度为 40次, 撕裂度为 220mN, 白度为 40%ISO,打浆度为 34° SR。 将上述未漂草浆进行打浆,打浆之后所得到的成浆质量标准为: 打浆度 45° SR, 打浆湿重为 2.8g。
将打浆后的浆料进行抄造,得到所述的本色擦手纸。所述的抄造在长网单缸纸机中进行。 所述的本色擦手纸定量为 23.0g/m2, 横向吸液高度 66mm/100s, 纵向湿抗张强度为 36 N/m, 白度为 41.5%ISO。
实施例 14
将稻草原料利用锤式破碎机进行干法备料之后,装入间歇式球形蒸煮器中,往间歇式球 形蒸煮器中加入蒸煮药液, 亚硫酸铵加入量为绝干原料量的 13%, 液比 1 : 4, 第一次加热 升温至 120°C, 在此温度下保温 40分钟, 再小放汽 25分钟, 二次加热升温 60分钟至温度 为 168°C, 保温 90分钟。蒸煮之后所得到的高硬度浆的硬度为 16相当于卡伯价 23, 打浆度 为 23.4° SR, 用稀黑液稀释至浓度为 2.5%, 再经过现有技术的筛选方法如跳筛筛选法进行 筛选, 筛选中损失为 0.2%。 再采用现有技术中真空洗浆机洗涤。 洗涤之后得到浓度为 10 % 的高硬度浆, 然后通过螺旋输送机加热该浆至 70°C并输送到中浓浆管。 该浆在中浓浆管中 先经过调质处理排除浆内的空气使之流态化, 后经离心式中浓浆泵输送到氧脱木素反应塔。 该浆在进入反应塔之前在管路中与加入的 20kg每吨浆的氧气和含碱量为以氢氧化钠计对绝 干浆量 3.5%的碱溶液混合, 并在管路中通入蒸汽将该浆加热升温。 之后该浆在混合器中经 过充分混合后进入氧脱木素反应塔, 保护剂为硫酸镁, 加入量为绝干浆量的 1 %, 进口温度 95°C, 压力 0.9Mpa, 停留 75分钟使该浆能进行充分的脱木素反应, 塔顶温度为 100°C, 压 力保持为 0.4MPa。 处理完成后将该浆喷放到浆池并稀释, 得到所述的未漂浆。 所述的未漂 浆的裂断长为 6.8km, 耐折度为 50次, 撕裂度为 250 mN, 白度为 45%ISO, 打浆度为 36° 将重量份 70%上述未漂草浆与 30%的未漂木浆分别进行打浆, 草浆打浆浓度 3.0%, 木 浆打浆浓度 4.5%, 打浆在双圆盘磨浆机种进行, 打浆之后所得到的成浆质量标准为: 草浆 打浆度 50° SR, 打浆湿重为 1.8g, 木浆打浆度 46 ° SR, 打浆湿重为 1.2g。 所述未漂阔叶木 浆其裂断长为 6.5km, 撕裂度为 1000mN, 白度为 18%ISO, 耐折次数为 1000次, 打浆度为 38° SR。
将打浆后的浆料混合均勾后进行抄造,得到所述的本色擦手纸。所述的抄造在长网双缸 纸机中进行。 所述的本色擦手纸定量为 38.2g/m2, 横向吸液高度 60mm/100s, 纵向湿抗 张强度为 30 N/m, 白度为 38%ISO。
实施例 15
将甘蔗渣原料经过干法常规备料且进行去髓后装入蒸球中,往蒸球中加入蒸煮药液,亚 硫酸铵加入量为绝干原料量的 11 %, 液比 1 : 2.5, 第一次加热升温至 130°C, 在此温度下保 温 20分钟, 再小放汽 20分钟, 二次加热升温 50分钟至温度为 165°C, 保温 70分钟。 蒸煮 得到硬度为 21相当于卡伯价 32的高硬度浆, 打浆度为 14.2° SR, 然后将高硬度浆送入现 有技术中提取黑液用的双螺旋挤浆机进行挤浆, 挤浆之后得到浓度为 25 %的高硬度浆, 再 经黑液稀释至 2.5%后送到真空洗浆机的洗涤,浆浓度在 10-13%然后将所得的浆通过螺旋输 送机加热该浆至 70°C并输送到中浓浆管。 该浆在中浓浆管中先经过调质处理排除浆内的空 气使之流态化,后经离心式中浓浆泵输送到氧脱木素反应塔。该浆在进入反应塔之前在管路 中与加入的 30kg每吨浆的氧气和含碱量为以氢氧化钠计对绝干浆重量 3 %的碱溶液混合, 并在管路中通入蒸汽将该浆加热升温。之后该浆在混合器中经过充分混合后进入氧脱木素反 应塔, 保护剂为硫酸镁, 加入量为绝干浆重量的 0.8 %, 进口温度 98°C, 压力 1.05Mpa, 停 留 85分钟使该浆能进行充分的脱木素反应, 塔顶温度为 102 °C, 压力保持为 0.4MPa。 处理 完成后将该浆喷放到浆池并稀释, 得到所述的未漂浆。 所述的未漂浆的裂断长为 6.0km, 耐 折度为 70次, 撕裂度为 230mN, 白度为 40%ISO, 打浆度为 35° SR。
将重量份 80%上述未漂草浆与 20%的未漂木浆分别进行打浆, 草浆打浆浓度 3.2%, 木 浆打浆浓度 4.0%, 打浆先后在双柱型精浆机和双盘磨机中进行, 打浆之后所得到的成浆质 量标准为: 草浆打浆度 50° SR, 打浆湿重为 1.8g, 阔叶木浆打浆度 41 ° SR, 打浆湿重为 1.5 go 所述的未漂木浆为现有技术的未漂木浆, 包括未漂硫酸盐针叶木浆、 未漂亚硫酸盐针叶 木浆等等, 其裂断长为 4.5km, 撕裂度为 500mN, 白度为 18%ISO, 耐折次数为 1000次, 打浆度为 38° SR。
将打浆后的浆料混合均勾后进行抄造,得到所述的本色擦手纸。所述的抄造在斜网单缸 纸机中进行。 所述的本色擦手纸定量为 45.0g /m2, 横向吸液高度 55mm/100s, 纵向湿抗 张强度为 28 N/m, 白度为 41%ISO。
实施例 16
将稻草利用锤式破碎机进行干法备料后装入蒸球中,往蒸球中加入蒸煮药液,用碱量以 氢氧化钠计对绝干原料量的 15 %, 液比 1 : 3, 蒽醌加入量为绝干原料量的 0.6%, 第一次加 热升温至 120°C, 在此温度下保温 20分钟, 再小放汽 20-30分钟, 二次加热升温 40分钟至 温度为 168°C, 保温 90分钟。 蒸煮后得到硬度为 18相当于卡伯价 27的高硬度浆, 打浆度 为 17° SR,再送至常规的提取黑液用的变径单螺旋挤浆机进行挤浆,从挤浆机中出来的浆料 用稀黑液稀释至浆的浓度至 2.5%, 送到跳筛进行粗浆筛选, 跳筛损失为 0.2%, 又通过高浓 度除渣器除去杂质, 损失 0.1%, 再将除渣后得到的浆进入水平带式洗浆机进行洗涤, 洗涤 时的浆浓度为 3.0%, 从洗浆机中出来的浆浓度为 9%, 洗涤过程中保持 68-70 °C, 再将其输 送到高频疏解机中进行疏解, 调浓后通过螺旋输送机加热该浆至 70°C并输送到中浓浆管。 该浆在中浓浆管中先经过调质处理排除浆内的空气使之流态化,后经离心式中浓浆泵输送到 氧脱木素反应塔。 该浆在进入反应塔之前在管路中与加入的 20kg每吨浆的氧气和含碱量为 以氢氧化钠计对绝干浆量的 4%的碱溶液, 并在管路中通入蒸汽将该浆加热升温。 之后该浆 在混合器中经过充分混合后进入氧脱木素反应塔,保护剂为硫酸镁,加入量为绝干浆重量的 1 % , 进口温度 102°C, 压力 1.12Mpa, 停留 70分钟使该浆能进行充分的脱木素反应, 塔顶 温度为 104 °C, 压力保持为 0.5MPa。 处理完成后将该浆喷放到浆池并稀释, 得到所述的未 漂浆。所述的未漂浆的裂断长为 4.4km,耐折度为 65次,撕裂度为 245mN, 白度为 37%ISO, 打浆度为 34° SR。
将重量份 95%上述未漂草浆与 5%的未漂木浆分别进行打浆,草浆打浆浓度 3.2%,木浆 打浆浓度 4.5%, 打浆在双盘磨浆机中进行, 打浆之后所得到的成浆质量标准为: 草浆打浆 度 55° SR, 打浆湿重为 2.0g, 木浆打浆度 48 ° SR, 打浆湿重为 2.0 g。 所述的未漂木浆为现 有技术的未漂硫酸盐阔叶木浆。
将打浆后的浆料进行均勾混合后抄造, 得到所述的本色卫生纸。
所述的本色卫生纸定量为 18.0g/m2, 横向吸液高度 60mm/100s, 抗张指数为 7.0N.m/g, 柔软度 130mN, 白度为 50%ISO。
实施例 17
将芦竹常规干法备料之后装入蒸球中,往蒸球中加入蒸煮药液,用碱量为以氢氧化钠计 对绝干浆量的 11%, 蒽醌加入量为 0.8%, 液比 1 : 4, 第一次加热升温至 130°C, 在此温度 下保温 40分钟, 再小放汽 30分钟, 二次加热升温 60分钟至温度为 173 °C, 保温 60分钟。 蒸煮后得到硬度为 25相当于卡伯价为 45的高硬度浆, 打浆度为 12° SR, 然后将高硬度浆 送入现有技术中提取黑液用的变径单螺旋挤浆机进行挤浆, 挤浆之后得到浓度为 20 %的高 硬度浆, 送到跳筛进行粗浆筛选, 跳筛损失为 0.2%, 又通过高浓度除渣器除去杂质, 损失 0.1%, 再将除渣后得到的浆进入水平带式洗浆机进行洗涤, 洗涤时的浆浓度为 2.0%, 从洗 浆机中出来的浆浓度为 9%, 洗涤过程中保持 68-70°C, 调浓后通过螺旋输送机加热该浆至 70°C 并输送到中浓浆管。 该浆在中浓浆管中先经过调质处理排除浆内的空气使之流态化, 后经离心式中浓浆泵输送到氧脱木素反应塔。 该浆在进入反应塔之前在管路中与加入的 20kg每吨浆的氧气和用碱量为以氢氧化钠计对绝干浆量 4 %碱溶液混合,并在管路中通入蒸 汽将该浆加热升温。之后该浆在混合器中经过充分混合后进入氧脱木素反应塔,保护剂为硫 酸镁, 加入量为绝干浆重量的 1 %, 进口温度 102°C, 压力 1.12Mpa, 停留 75分钟使该浆能 进行充分的脱木素反应, 塔顶温度为 104 °C, 压力保持为 0.5MPa。 处理完成后将该浆喷放 到浆池并稀释, 得到所述的未漂浆。 所述的未漂浆的裂断长为 5.0km, 耐折度为 69次, 撕 裂度为 255mN, 白度为 42%ISO, 打浆度为 33° SR。
将重量份 70%上述未漂草浆与 30%的未漂木浆进行配制, 两种浆分别进行打浆, 先在 圆柱精浆机种进行打浆, 其打浆浓度为 3.8%, 打浆压力为 0.15-0.20MPa, 打浆电流为 65A; 然后在双圆盘磨浆机种进行打浆, 其打浆浓度为 3.3 %, 打浆压力为 0.20MPa, 打浆电流为 60A, 打浆之后所得到的成浆质量标准为: 打浆度 48° SR, 打浆湿重为 2.8g。 所述的未漂木 浆为现有技术的未漂木浆, 包括未漂硫酸盐阔叶木浆、未漂亚硫酸盐针叶木浆等等, 其裂断 长为 6km,撕裂度为 1000mN, 白度为 18%ISO,耐折次数为 1000次以上,打浆度为 40° SR。
将打浆后的浆料进行抄造, 得到所述的本色卫生纸。
所述的本色卫生纸定量为 11.0g/m2, 横向吸液高度 80mm/100s, 抗张指数 10.0N.m/g, 柔软度 120mN, 白度为 38%ISO。
实施例 18
将质量比为 1 : 3: 1的稻草、麦草和芦苇利用锤式破碎机进行干法备料后装入蒸煮锅中, 由温度为 135°C的热黑液通过装锅器装入蒸煮锅中, 液比 1 : 8, 当装满后关闭锅盖, 往蒸煮 锅中加入温度为 145°C蒸煮药剂,用碱量为以氢氧化钠计对绝干原料量的 11 %, 蒽醌加入量 为绝干原料量的 0.8%, 将装锅黑液和空气排出并升压至 0.6MPa, 开启蒸煮锅的蒸煮液循环 泵和列管加热器为蒸煮液加热到 160°C, 升温和保温 180分钟。 用稀黑液将热黑液置换出, 送至热黑液罐, 蒸煮后的得到硬度为 19相当于卡伯价 29的高硬度浆, 打浆度 16° SR, 再送 至常规的提取黑液用的变径单螺旋挤浆机进行挤浆,从挤浆机中出来的浆料用稀黑液稀释至 浆的浓度至 3.0%, 送到跳筛进行粗浆筛选, 跳筛损失为 0.2%, 又通过高浓度除渣器除去杂 质,损失 0.1%,再将除渣后得到的浆进入水平带式洗浆机进行洗涤,洗涤时的浆浓度为 3.0%, 从洗浆机中出来的浆浓度为 9%, 洗涤过程中保持 70 , 再将其输送到高频疏解机中进行疏 解,浆再通过中浓浆管中先经过调质处理排除浆内的空气使之流态化,后经离心式中浓浆泵 输送到氧脱木素反应塔。 该浆在进入反应塔之前在管路中与加入的 20kg每吨浆的氧气和含 碱量为以氢氧化钠计对绝干浆重量 4%的碱溶液混合,并在管路中通入蒸汽将该浆加热升温。 之后该浆在混合器中经过充分混合后进入氧脱木素反应塔,保护剂为硫酸镁,加入量为绝干 浆重量的 1 %,进口温度 95°C,压力 0.9Mpa,停留 75分钟使该浆能进行充分的脱木素反应, 塔顶温度为 100°C, 压力保持为 0.4MPa。 处理完成后将该浆喷放到浆池并稀释, 得到所述 的未漂浆。 所述的未漂浆的裂断长为 6.5km, 耐折度为 45 次, 撕裂度为 250mN, 白度为
42%ISO, 打浆度为 33° SR。
将重量份 95%上述未漂草浆与 5%的未漂木浆进行配制, 两种浆分别进行打浆, 打浆在 双圆盘磨浆机种进行打浆, 其打浆浓度为 3.4%, 打浆之后所得到的成浆质量标准为: 打浆 度 48° SR, 打浆湿重为 2.9g。所述的未漂木浆为现有技术的未漂木浆, 包括未漂硫酸盐阔叶 木浆、 未漂亚硫酸盐针叶木浆等等, 其裂断长为 6km, 撕裂度为 lOOOm , 白度为 20%ISO, 耐折次数为 1000次以上, 打浆度为 38° SR。
将打浆后的浆料进行抄造, 得到所述的本色卫生纸。
所述的本色卫生纸定量为 13.0g/m2, 横向吸液高度 30mm/100s, 纵向湿抗张强度为 22N/m, 柔软度 140mN, 白度为 50%ISO。
实施例 19
将麦草原料采用锤式破碎机进行备料之后装入蒸球中,往蒸球中加入蒸煮药液,亚硫酸 铵加入量为绝干原料量的 9 %, 液比 1 : 3, 第一次加热升温至 110°C, 在此温度下保温 30 分钟, 再小放汽 25分钟, 二次加热升温 60分钟至温度为 168°C, 保温 90分钟。 蒸煮之后 所得到的高硬度浆的硬度为 22相当于卡伯价 35.5, 打浆度为 11.6° SR, 用稀黑液稀释至浓 度为 2.5%, 再经过现有技术的筛选方法如跳筛筛选法进行筛选, 筛选中损失为 0.5%。 再采 用现有技术中真空洗浆机洗涤。 洗涤之后得到浓度为 10 %的高硬度浆, 输送到中浓浆管。 经中浓浆泵输送到氧脱木素反应塔。 该浆在进入反应塔之前在管路中与加入的 20kg每吨浆 的氧气和对绝干浆量以氢氧化钠计 4%的碱溶液混合,并在管路中通入蒸汽将该浆加热升温。 之后该浆在混合器中经过充分混合后进入氧脱木素反应塔,保护剂为硫酸镁,加入量为绝干 浆量的 1 %, 进口温度 95°C, 压力 0.9Mpa, 停留 75分钟使该浆能进行充分的脱木素反应, 塔顶温度为 100°C, 压力保持为 0.3MPa。 处理完成后将该浆喷放到浆池并稀释, 得到所述 的未漂浆。 所述的未漂草浆的裂断长为 5.0km, 耐折度为 40次, 撕裂度为 220mN, 白度为
40%ISO,打浆度为 34° SR。 将上述未漂草浆进行打浆,打浆之后所得到的成浆质量标准为: 打浆度 45° SR, 打浆湿重为 2.8g。
将打浆后的浆料进行抄造,得到所述的本色擦拭纸。所述的抄造在长网单缸纸机中进行。 所述的本色擦拭纸定量为 14.0g/m2, 横向吸液高度 100mm/100s, 纵向湿抗张强度为 55
N/m, 白度为 45%ISO。
实施例 20
将稻草原料利用锤式破碎机进行干法备料之后,装入间歇式球形蒸煮器中,往间歇式球 形蒸煮器中加入蒸煮药液, 亚硫酸铵加入量为绝干原料量的 13%, 液比 1 : 4, 第一次加热 升温至 120°C, 在此温度下保温 40分钟, 再小放汽 25分钟, 二次加热升温 60分钟至温度 为 168°C, 保温 90分钟。蒸煮之后所得到的高硬度浆的硬度为 16相当于卡伯价 23, 打浆度 为 23.4° SR, 用稀黑液稀释至浓度为 2.5%, 再经过现有技术的筛选方法如跳筛筛选法进行 筛选, 筛选中损失为 0.2%。 再采用现有技术中真空洗浆机洗涤。 洗涤之后得到浓度为 10 % 的高硬度浆, 然后通过螺旋输送机加热该浆至 70°C并输送到中浓浆管。 该浆在中浓浆管中 先经过调质处理排除浆内的空气使之流态化, 后经离心式中浓浆泵输送到氧脱木素反应塔。 该浆在进入反应塔之前在管路中与加入的 20kg每吨浆的氧气和含碱量为以氢氧化钠计对绝 干浆量 3.5%的碱溶液混合, 并在管路中通入蒸汽将该浆加热升温。 之后该浆在混合器中经 过充分混合后进入氧脱木素反应塔, 保护剂为硫酸镁, 加入量为绝干浆量的 1 %, 进口温度 95°C, 压力 0.9Mpa, 停留 75分钟使该浆能进行充分的脱木素反应, 塔顶温度为 100°C, 压 力保持为 0.4MPa。 处理完成后将该浆喷放到浆池并稀释, 得到所述的未漂浆。 所述的未漂 浆的裂断长为 6.8km, 耐折度为 50次, 撕裂度为 250 mN, 白度为 45%ISO, 打浆度为 36° 将重量份 70%上述未漂草浆与 30%的未漂木浆分别进行打浆, 草浆打浆浓度 3.0%, 木 浆打浆浓度 4.5%, 打浆在双圆盘磨浆机种进行, 打浆之后所得到的成浆质量标准为: 草浆 打浆度 50° SR, 打浆湿重为 1.8g, 木浆打浆度 46 ° SR, 打浆湿重为 1.2g。 所述未漂阔叶木 浆其裂断长为 6.5km, 撕裂度为 1000mN, 白度为 18%ISO, 耐折次数为 1000次, 打浆度为 38° SR。
将打浆后的浆料混合均勾后进行抄造,得到所述的本色擦拭纸。所述的抄造在长网双缸 纸机中进行。 所述的本色擦拭纸定量为 36.0g/m2, 横向吸液高度 60mm/100s, 纵向湿抗 张强度为 40N/m, 白度为 45%ISO。

Claims

权利 要 求 书
1、 一种以禾草类纸浆为原料制备的本色纸制品, 其特征在于, 所述的本色纸制品的白度为 35-60%ISO, 优选所述白度为 35-45%ISO, 所述的禾草类纸浆为未漂草浆。
2、根据权利要求 1所述的本色纸制品,其特征在于,所述的未漂草浆的裂断长为 5.0-7.5km, 撕裂度为 230-280mN, 白度为 25-45%ISO, 耐折次数为 40-90次, 打浆度为 32-38 ° SR; 优 选所述的未漂草浆的裂断长为 6.5-7.5km, 撕裂度为 250-280mN, 耐折次数为 65-90次, 打 浆度为 32-36° SR, 白度为 35-45%ISO。
3、 根据权利要求 1所述的本色纸制品, 其特征在于, 所述的本色纸制品包括本色卫生纸、 本色擦手纸、 本色擦拭纸、 本色复印纸、 本色餐盒、 本色食品包装纸或本色印刷纸。
4、 根据权利要求 1-3中任意一项所述的本色纸制品, 其特征在于, 所述的本色纸制品为本 色卫生纸, 所述的本色卫生纸所用的浆料包括 70-100%的未漂草浆和 0-30%的未漂木浆; 或 者所述的本色纸制品为本色擦手纸,所述的本色擦手纸所用的浆料包括 70-100%的未漂草浆 和 0-30%的未漂木浆; 或者所述的本色纸制品为本色餐盒, 所述本色餐盒包括 70-100%的未 漂草浆和 0-30%的未漂木浆; 或者所述的本色纸制品为本色复印纸, 所述的本色复印纸所用 的浆料包括 50-80%的未漂草浆和 20-50%的未漂木浆;或者所述的本色纸制品为本色食品包 装纸, 所述的本色食品包装纸所用的浆料包括 50-70%的未漂草浆和 30-50%的未漂木浆; 或 者所述的本色纸制品为本色胶版印刷纸, 所述的本色胶版印刷纸所用的浆料包括 65-85%的 未漂草浆和 15-35%的未漂木浆; 或者所述的本色纸制品为本色擦拭纸, 所述的本色擦拭纸 所用的浆料包括 70-100%的未漂草浆和 0-30%的未漂木浆。
5、 根据权利要求 4所述的本色纸制品, 其特征在于, 所述的本色卫生纸的横向吸液高度为 30-100 mm/lOOs, 优选所述的横向吸液高度为 40-100 mm/100s, 更优选所述的横向吸液高度 为 50-80mm/100s; 或者所述的本色擦手纸纵向湿抗张强度为 22-55N/m, 优选所述的纵向湿 抗张强度为 30-45N/m;或者所述的本色餐盒其性能参数符合餐盒 GB 18006.1-1999 A等品的 要求; 或者所述本色复印纸的纵横向平均裂断长为 3.2-7.5km, 优选所述的本色复印纸的纵 横向平均裂断长为 4.5-7.5km, 更优选所述的本色复印纸的纵横向平均裂断长为 6.0-7.5km; 或者所述的本色食品包装纸的裂断长为 3.2-7.6km, 优选所述的本色食品包装纸的裂断长为 4.5-7.6 km ; 或者所述的本色胶版印刷纸的裂断长为 2.5-5.5km, 优选所述的裂断长为 3.5-5.5km; 或者所述的本色擦拭纸的纵向湿抗张强度为 22-55N/m, 优选所述本色擦拭纸的 纵向湿抗张强度为 30-45N/m。
6、 根据权利要求 4 所述的本色纸制品, 其特征在于, 所述的本色卫生纸的抗张指数为 4-12N.m/g, 优选所述的抗张指数为 8-12 N.m/g; 或者所述的本色擦手纸的横向吸液高度为 30-100 mm/lOOs, 优选所述的本色擦手纸的横向吸液高度为 40-100 mm/100s, 更优选所述的 本色擦手纸的横向吸液高度为 50-80 mm/lOOs; 或者所述本色复印纸的横向耐折度为 60-200 次, 优选所述的横向耐折度为 80-185次; 或者所述的本色复印纸的不透明度为 82.0-98.0%, 优选所述的不透明度为 90-98%; 或者所述的本色食品包装纸的横向耐折度为 90-200次, 优 选所述的横向耐折度为 120-200次; 或者所述的本色胶板印刷纸的不透明度为 82-98%,, 优 选所述的不透明度为 85-98%, 更优选所述的不透明度为 92-98%; 或者所述的本色擦拭纸的 横向吸液高度为 30-100 mm/100s , 优选所述的本色擦拭纸的横向吸液高度为 40-100 mm/lOOs, 更优选所述的本色擦拭纸的横向吸液高度为 50-80 mm/100s。
7、 根据权利要求 4-6中任一所述的本色纸制品, 其特征在于, 所述的本色卫生纸的柔软度 为 120-180m N,优选所述的本色卫生纸的柔软度为 120-150 m N; 或者所述的本色擦手纸的 柔软度为 120-180m N, 优选所述的本色擦手纸的柔软度为 120-150 m N; 或者所述的本色食 品包装纸的横向撕裂度为 300-600m N,优选所述的本色食品包装纸的横向撕裂度为 400-600 m N; 或者所述的本色胶版印刷纸的耐折度为 10-35次, 优选所述的横向耐折度为 15-35次。
8、 根据权利要求 4-6中任一所述的本色纸制品, 其特征在于, 所述的本色卫生纸的定量为 10.0-18.0 g/m2, 优选所述的本色卫生纸的定量为 11.0-13.0 g/m2; 或者所述的本色擦手纸的 定量为 23.0-45.0g/m2,优选所述本色擦手纸的定量为 30-40 g/m2;或者所述的本色复印纸定量 为 60.0-80.0g/m2, 优选所述本色复印纸的定量为 70.0-80.0 g/m2, 更优选所述本色复印纸的 定量为 69.0-72.0 g/m2;或者所述的本色食品包装纸的定量为 45-65 g/m2,优选所述的本色食 品包装纸的定量为 50-60 g/m2; 或者所述的本色擦拭纸的定量为 14.0-36.0g/m2, 优选所述的 本色擦拭纸的定量为 18-28 g/m2; 或者所述的本色胶版印刷纸的定量为 50-70 g/m2, 优选所 述定量为 60.0-70.0 g/m2
9、 根据权利要求 4-6中任一所述的本色纸制品, 其特征在于, 所述的本色擦拭纸的柔软度 为 120-200m N, 优选所述的本色擦拭纸的柔软度为 120-180 m N。
10、 根据权利要求 1-3中任一所述的本色纸制品, 其特征在于, 所述的未漂草浆的制备包括 蒸煮、洗涤步骤, 其中所述的蒸煮包括: 以禾草类植物为原料经过蒸煮后得到硬度为高锰酸 钾值 16-28, 打浆度为 10-24° SR的高硬度浆; 优选所述的未漂草浆以禾草类植物为原料经 过蒸煮后得到硬度为高锰酸钾值 16-23, 打浆度为 10-24° SR的高硬度浆。
11、 根据权利要求 1-3中任一所述的本色纸制品, 其特征在于, 所述的未漂草浆的制备包括 蒸煮、氧脱木素的步骤,其中所述的氧脱木素包括:将蒸煮之后得到硬度为高锰酸钾值 16-28 的高硬度浆泵送至氧脱木素反应塔,并加入氢氧化钠和氧气;该高硬度浆在该氧脱木素反应 塔内进行脱木素反应, 得到硬度为高锰酸钾值 10— 14的浆;
优选所述的氧脱木素为单段氧脱木素,在氧脱木素反应塔中进行;所述的高硬度浆在该 反应塔进口处的温度为 95— 100°C, 压力为 0.9— 1.2MPa; 出口处的温度为 100— 105°C, 压 力为 0.2— 0.6MPa; 所述的氧脱木素处理中用碱量为以氢氧化钠计对绝干浆量的 2-4%, 氧 气的加入量为 20— 40kg每吨绝干浆; 所述的高硬度浆在该反应塔内的反应时间为 60— 90 分钟。
12、 根据权利要求 10中任一所述的本色纸制品, 其特征在于, 所述的蒸煮包括: 包括亚硫 酸铵法蒸煮、 蒽醌-烧碱法蒸煮、 硫酸盐法蒸煮或者碱性亚钠法蒸煮中的一种:
亚硫酸铵法蒸煮时, 亚硫酸铵的用量为对绝干原料量的 9-13%;
蒽醌-烧碱法蒸煮时, 用碱量为以氢氧化钠计对绝干原料量 9-15%;
硫酸盐法蒸煮时, 用碱量为氢氧化钠计对绝干原料量 8-11%;
碱性亚钠法蒸煮时,氢氧化钠用量以绝干原料重量计为 11一 15%,亚硫酸钠用量为绝干 原料重量的 2— 6%。
13、根据权利要求 12所述的本色纸制品,其特征在于,所述的蒸煮包括: 亚硫酸铵法蒸煮、 蒽醌-烧碱法蒸煮、 硫酸盐法蒸煮或者碱性亚钠法蒸煮中的一种:
1 ) 在间歇式球型蒸煮器和连续蒸煮器中:
所述的亚硫酸铵法蒸煮为:
①在禾草类植物原料中加入蒸煮药液, 其中亚硫酸铵用量为对绝干原料量的 9-13%,配氢氧 化钠量为绝干原料量的 0-8%, 液比为 1 : 2-4;
②通入蒸汽进行加热, 加热升温至温度 165-173°C, 升温、 小放气、 保温全程时间 160-210 分钟;
所述的蒽醌-烧碱法蒸煮为:
①在禾草类植物原料中加入蒸煮药液, 其中用碱量为以氢氧化钠计对绝干原料量 9-15%, 液 比为 1 : 2-4, 蒽醌加入量为绝干原料量的 0.5-0.8%。;
②通入蒸汽进行加热, 加热升温至温度 160-165°C, 升温、 小放气、 保温全程时间 140-190 分钟;
所述的硫酸盐法蒸煮为:
①在禾草类植物原料中加入蒸煮药液, 其中用碱量为氢氧化钠计对绝干原料量 8-11%, 液比 为 1 : 2-4, 硫化度为 5-8%;
②通入蒸汽进行加热, 加热升温至温度 165-173°C, 升温、 小放气、 保温全程时间 150-200 分钟;
所述碱性亚钠法蒸煮包括:
①在禾草原料中加入蒸煮药液, 其中氢氧化钠用量以绝干原料重量计为 9一 15%, 亚硫酸钠 为 2—6%, 蒽醌为 0.04—0.08%, 蒸煮液比为 1 :3-4;
②通入蒸汽进行加热, 加热升温至温度 160-165°C, 升温、 小放气、 保温全程时间 140-190 分钟; 2) 在立式蒸煮锅中:
所述的亚硫酸铵法蒸煮为:
将禾草类植物原料由温度为 120-140'C的热黑液通过装锅器装入蒸煮锅中, 当装锅满后 关闭锅盖, 往蒸煮锅中补充温度为 130-160 °C蒸煮药剂, 同时排出锅内的空气并升压至 0.6-0.75MPa,开启系统的蒸煮液加热循环泵和列管加热器为蒸煮液升温至 156-173 °C,升温、 保温和置换为 180-220分钟, 最后用泵放将浆送到喷放锅; 所述的蒸煮药剂中, 其中亚硫酸 铵用量为对绝干原料量的 9-15%, 配氢氧化钠量为绝干原料量的 0-8%, 液比为 1 : 6-10; 所述的蒽醌-烧碱法蒸煮为:
将禾草类植物原料由温度为温度为 120-140'C的热黑液通过装锅器装入蒸煮锅中, 当装 锅满后关闭锅盖, 往蒸煮锅中补充温度为 130-160'C蒸煮药剂, 同时排出锅内的空气并升压 至 0.4-0.6MPa, 开启系统的蒸煮液加热循环泵和列管加热器为蒸煮液升温至 147-165°C, 升 温、保温和置换为 180分钟, 最后用泵放将浆送到喷放锅; 所述的蒸煮药剂中, 用碱量为以 氢氧化钠计对绝干原料量 9-17%, 液比为 1 : 6-9, 蒽醌加入量为绝干原料量的 0.5-0.8%。; 所述的硫酸盐法蒸煮为:
将禾草类植物原料由温度为 120-140'C的热黑液通过装锅器装入蒸煮锅中, 当装锅满后 关闭锅盖, 往蒸煮锅中补充温度为 130-160 °C蒸煮药剂, 同时排出锅内的空气并升压至 0.5-0.65MPa,开启系统的蒸煮液加热循环泵和列管加热器为蒸煮液升温至 155-168°C,升温、 保温和置换 200-250分钟, 最后用泵放将浆送到喷放锅; 所述的蒸煮药剂中, 其中用碱量为 氢氧化钠计对绝干原料量 8-13%, 液比为 1 : 6-10, 硫化度为 5-9%;
所述碱性亚钠法蒸煮包括:
将禾草类植物原料原料由温度为 120-140'C的热黑液通过装锅器装入蒸煮锅中, 当装锅 满后关闭锅盖, 往蒸煮锅中补充温度为 130-160'C蒸煮药剂, 同时排出锅内的空气并升压至 0.45-0.6MPa,开启系统的蒸煮液加热循环泵和列管加热器为蒸煮液升温至 152-165°C,升温、 保温和置换为 180-230分钟, 最后用泵放将浆送到喷放锅; 所述的蒸煮药剂中, 其中氢氧化 钠的用量以绝干原料重量计为 9-17%, 亚硫酸钠的用量为绝干原料重量的 4-8%, 蒽醌的用 量为绝干原料重量的 0.04-0.08%, 液比为 1 : 6-10。
14、 根据权利要求 11所述的本色纸制品, 其特征在于, 所述的未漂草浆的制备在蒸煮之后 氧脱木素之前, 还包括洗涤步骤, 所述的洗涤包括:
( 1 ) 将浓度为 8-15%的所述高硬度浆从挤浆机的入口进入, 在挤压力的作用下挤出黑 液, 得到浓度为 18-25%的挤浆后的浆料; 所述的挤浆机优选为变径的单螺旋挤浆机、 双螺 旋挤浆机或者双辊挤浆机;
(2)将挤浆后的浆料用温度 70-80°C下浓度为 3-6.2° Be ' 并且 pH8-8.3的黑液或者用温 度 70-80'C清水中的一种或者两种进行洗涤, 所述的洗涤在真空洗浆机、 压力洗浆机或水平 带式洗浆机中进行。
15、根据权利要求 1-3中任一所述的本色纸制品,其特征在于,所述的禾草类植物包括稻草、 麦草、 棉杆、 甘蔗渣、 芦苇或芦竹中的一种或几种的组合。
16、 一种制备权利要求 1-15任一所述的本色纸制品的方法, 其特征在于, 所述的方法包括:
( 1 ) 将禾草原料进行蒸煮, 再进行洗涤、 疏解后, 进行氧脱木素处理, 得到所述的未 漂草浆;
(2) 将上述未漂草浆和未漂木浆分别进行打浆, 得到打浆后的浆料;
( 3 )将步骤(2)中上述未漂草浆和未漂木浆按照纸制品所需要的浆料重量份进行混合, 使浆料均勾; 或者将将步骤 (2) 中上述未漂草浆和未漂木浆按照纸制品所需要的浆料重量 份进行混合, 使浆料均勾;
(4) 将打浆后的浆料进行抄造, 得到所述的本色纸制品。
17、 根据权利要求 16所述的本色纸制品的制备方法, 其特征在于, 所述的蒸煮包括: 以禾 草类植物为原料经过蒸煮后得到硬度为高锰酸钾值 16-28,打浆度为 10-24° SR的高硬度浆; 优选所述的未漂草浆以禾草类植物为原料经过蒸煮后得到硬度为高锰酸钾值 16-23, 打浆度 为 10-24° SR的高硬度浆。
18、 根据权利要求 16所述的本色纸制品的制备方法, 其特征在于, 所述的氧脱木素包括: 将蒸煮之后得到硬度为高锰酸钾值 16-28的高硬度浆泵送至氧脱木素反应塔,并加入氢氧化 钠和氧气; 该高硬度浆在该氧脱木素反应塔内进行脱木素反应, 得到硬度为高锰酸钾值 10 - 14的浆;
优选所述的氧脱木素为单段氧脱木素,在氧脱木素反应塔中进行;所述的高硬度浆在该 反应塔进口处的温度为 95— 100°C, 压力为 0.9— 1.2MPa; 出口处的温度为 100— 105°C, 压 力为 0.2— 0.6MPa; 所述的氧脱木素处理中用碱量为以氢氧化钠计对绝干浆量的 2-4%, 氧 气的加入量为 20— 40kg每吨绝干浆; 所述的高硬度浆在该反应塔内的反应时间为 60— 90 分钟。
19、 根据权利要求 16所述的本色纸制品的制备方法, 其特征在于, 所述的疏解包括: 将洗 涤后所得的浆料用高频疏解机、揉搓机、盘式粉碎机、打浆设备中的盘磨机或纤维分离机进 行处理, 使纤维结构变得疏松。
20、 一种未漂草浆在制备权利要求 1 -3任一所述的本色纸制品方面的用途。
21、 根据权利要求 20所述的用途, 其特征在于, 所述的未漂草浆的裂断长为 5.0-7.5km, 撕 裂度为 230-280mN, 白度为 25-45%ISO, 耐折次数为 40-90次, 打浆度为 32-38 ° SR; 优选 所述的未漂草浆的裂断长为 6.5-7.5km, 撕裂度为 250-280m , 耐折次数为 65-90次, 打浆 度为 32-36° SR, 白度为 35-45%ISO。
22、 根据权利要求 20所述的用途, 其特征在于, 所述的未漂草浆的制备方法包括蒸煮、 洗 涤和氧脱木素步骤,其中所述的蒸煮包括: 以禾草类植物为原料经过蒸煮后得到硬度为高锰 酸钾值 16-28, 叩解度为 10-24° SR的高硬度浆; 优选所述的未漂草浆以禾草类植物为原料 经过蒸煮后得到硬度为高锰酸钾值 16-23, 叩解度为 10-24° SR的高硬度浆。
23、 根据权利要求 20所述的用途, 其特征在于, 所述的未漂草浆的制备包括蒸煮、 洗涤和 氧脱木素的步骤, 其中所述的氧脱木素包括: 将蒸煮之后得到硬度为高锰酸钾值 16-28的高 硬度浆泵送至氧脱木素反应塔,并加入氢氧化钠和氧气;该高硬度浆在该氧脱木素反应塔内 进行脱木素反应, 得到硬度为高锰酸钾值 10— 14的浆;
优选所述的氧脱木素为单段氧脱木素,在氧脱木素反应塔中进行;所述的高硬度浆在该 反应塔进口处的温度为 95— 100°C, 压力为 0.9— 1.2MPa; 出口处的温度为 100— 105°C, 压 力为 0.2— 0.6MPa; 所述的氧脱木素处理中用碱量为以氢氧化钠计对绝干浆量的 2-4%, 氧 气的加入量为 20— 40kg每吨绝干浆; 所述的高硬度浆在该反应塔内的反应时间为 60— 90 分钟。
24、 根据权利要求 22或 23所述的用途, 其特征在于, 所述的蒸煮包括: 包括亚硫酸铵法蒸 煮、 蒽醌-烧碱法蒸煮、 硫酸盐法蒸煮或者碱性亚钠法蒸煮中的一种:
亚硫酸铵法蒸煮时, 亚硫酸铵的用量为对绝干原料量的 9-13%;
蒽醌-烧碱法蒸煮时, 用碱量为以氢氧化钠计对绝干原料量 9-15%;
硫酸盐法蒸煮时, 用碱量为氢氧化钠计对绝干原料量 8-11%;
碱性亚钠法蒸煮时,氢氧化钠用量以绝干原料重量计为 11一 15%,亚硫酸钠用量为绝干 原料重量的 2— 6%。
25、 根据权利要求 22或 23所述的用途, 其特征在于, 所述的洗涤包括:
( 1 )将浓度为 8- 15%的所述高硬度浆从挤浆机的入口进入, 在挤压力的作用下挤出黑液, 得到浓度为 18-25%的挤浆后的浆料; 所述的挤浆机优选为变径的单螺旋挤浆机、 双螺旋 挤浆机或者双辊挤浆机;
( 2 ) 将挤浆后的浆料用温度 70-80°C下浓度为 3-6.2° Be ' 并且 pH8- 8.3的黑液或者用 温度 70-80'C清水中的一种或者两种进行洗涤, 所述的洗涤在真空洗浆机、 压力洗浆机或 水平带式洗浆机中进行。
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110226430A1 (en) * 2010-01-14 2011-09-22 Khosrow Parviz Mohammadi Soft and strong fibrous structures and methods for making same
US8808501B2 (en) 2005-06-23 2014-08-19 The Procter & Gamble Company Methods for individualizing trichomes

Families Citing this family (70)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2224059B1 (en) * 2007-12-05 2014-09-10 Shandong Fuyin Paper & Environmental Protection Technology Co., Ltd Grass type unbleached paper products and production method thereof
CA2749168C (en) * 2008-12-09 2017-09-12 Shandong Fuyin Paper & Environmental Protection Technology Co., Ltd A base paper, the preparation method and use thereof
CN101691712B (zh) * 2009-04-30 2011-08-17 山东福荫造纸环保科技有限公司 一种改善的游离度、透气度和撕裂指数且性能稳定的本色草浆
CN101684628B (zh) * 2009-04-30 2012-07-18 山东福荫造纸环保科技有限公司 一种改善的色相、松厚度和耐折度且性能稳定的本色草浆
CN101660285B (zh) * 2009-04-30 2012-06-27 山东福荫造纸环保科技有限公司 一种改善的色相、耐折度和松厚度且性能稳定的本色草浆
CN101691703B (zh) * 2009-04-30 2011-10-26 山东福荫造纸环保科技有限公司 一种改善的撕裂指数、游离度和抗张指数且性能稳定的本色草浆
CN101691708B (zh) * 2009-04-30 2011-08-10 山东福荫造纸环保科技有限公司 一种色相、不透明度和游离度改善且性能稳定的本色草浆
CN101691711B (zh) * 2009-04-30 2012-10-03 山东福荫造纸环保科技有限公司 一种改善的游离度、抗张指数和耐折度且性能稳定的本色草浆
CN101691709B (zh) * 2009-04-30 2011-08-10 山东福荫造纸环保科技有限公司 一种改善的游离度、透气度和抗张指数且性能稳定的本色草浆
CN101942777B (zh) * 2009-07-07 2012-02-29 山东福荫造纸环保科技有限公司 一种性能改善且稳定的本色草浆
CN101666054B (zh) * 2009-09-22 2012-02-15 上海东冠华洁纸业有限公司 一种生产生活用纸的方法
CN101768887B (zh) * 2010-03-17 2012-12-26 山东和润浆纸有限公司 秸秆制浆造纸过程中的循环利用方法
CN102277786A (zh) * 2010-06-09 2011-12-14 中国制浆造纸研究院 一种双胶纸或静电复印纸的制备方法
CN101864689A (zh) * 2010-06-11 2010-10-20 宝鸡科达特种纸业有限责任公司 热压垫板纸及制备工艺
US8795469B2 (en) 2010-06-25 2014-08-05 Prairie Paper Ventures Inc. Method for preparing nonwood fiber paper
KR101048410B1 (ko) * 2010-08-13 2011-07-12 충남대학교산학협력단 미세구조의 고순도 실리카 및 섬유를 동시에 제조하는 방법
AR088750A1 (es) * 2011-08-30 2014-07-02 Cargill Inc Procesos de elaboracion de pulpa
AR088787A1 (es) * 2011-08-30 2014-07-10 Cargill Inc Composicion de pulpa
CN103890265A (zh) * 2011-09-28 2014-06-25 草原纸业投资股份有限公司 一种用于制备非木质纤维纸的方法
CN102578945A (zh) * 2012-02-21 2012-07-18 金红叶纸业集团有限公司 多层生活用纸
CH707151A2 (fr) * 2012-10-26 2014-04-30 Stefan Grass Procédé de transformation industrielle de seigle vert.
CN103374861A (zh) * 2013-08-12 2013-10-30 夹江汇丰纸业有限公司 一种环保、健康的生活用纸生产工艺
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US20160002858A1 (en) * 2014-07-03 2016-01-07 Linde Aktiengesellschaft Methods for the oxygen-based delignification of pulp
CN104141256B (zh) * 2014-07-24 2017-01-18 四川环龙新材料有限公司 一种具有高抑菌活性的本色竹纤维及其制备方法
CN104389215A (zh) * 2014-10-23 2015-03-04 广东比伦生活用纸有限公司 一种环保节能的生活用纸纸浆的生产方法
CN104452468A (zh) * 2014-10-31 2015-03-25 阜阳荣泽涂布技术包装有限公司 一种食品包装纸及其生产方法
US10577748B2 (en) * 2015-04-29 2020-03-03 Essity Hygiene And Health Aktiebolag Tissue paper comprising pulp fibers originating from miscanthus and method for manufacturing the same
CN106283831A (zh) * 2015-05-13 2017-01-04 崇海琴 一种造纸浆配料
CN105568745B (zh) * 2015-12-24 2017-08-01 浙江华川实业集团有限公司 一种复印纸及其制备方法
CN105780566A (zh) * 2016-03-25 2016-07-20 安徽格义循环经济产业园有限公司 本色纸的制造方法
CN105625076A (zh) * 2016-03-25 2016-06-01 安徽格义循环经济产业园有限公司 环保型本色纸
CN105780583B (zh) * 2016-03-25 2018-04-06 安徽格义循环经济产业园有限公司 非木材类纸浆
CN105951502A (zh) * 2016-06-17 2016-09-21 铜陵方正塑业科技有限公司 食品包装袋及其制备方法
CN106400602B (zh) * 2016-10-12 2019-03-26 福建希源纸业有限公司 一种蛋糕托纸及其制作方法
EP3339504A1 (en) 2016-12-22 2018-06-27 Lenzing Aktiengesellschaft Method of pulping cotton-based raw material
CN107012718A (zh) * 2017-03-24 2017-08-04 安徽格义循环经济产业园有限公司 一种工业擦拭纸及其制备方法
BR112019021492A2 (pt) * 2017-04-28 2020-05-12 Kimberly-Clark Worldwide, Inc. Folha de papel tissue, e, método para personalizar o índice de tração e o padrão canadense de desobstrução de fibras em uma folha de papel tissue.
CN107059484A (zh) * 2017-05-24 2017-08-18 钦州市圆森教育咨询有限公司 一种抗菌防尘复印纸及其制备方法
CN107287985B (zh) * 2017-06-29 2018-12-28 苏州安特实业有限公司 一种可长久保白的环保可降解食品包装纸及其制备方法
CN107217540A (zh) * 2017-06-30 2017-09-29 南宁东印时代广告有限公司 彩色喷墨打印纸
CN109957990A (zh) * 2017-12-25 2019-07-02 福建省青山纸业股份有限公司 一种用竹浆生产复合原纸工艺方法
CN108221453B (zh) * 2017-12-29 2020-11-17 云南云景林纸股份有限公司 一种纯木浆本色生活用纸的制备方法
WO2020004645A1 (ja) 2018-06-29 2020-01-02 ユニ・チャーム株式会社 吸収性物品
CN109082943A (zh) * 2018-08-08 2018-12-25 东莞市白天鹅纸业有限公司 一种双色抽纸及其生产方法
CN109537342A (zh) * 2018-11-08 2019-03-29 福建省青山纸业股份有限公司 一种添加亚硫酸钠的硫酸盐制浆工艺
CN109577059B (zh) * 2018-12-29 2020-05-01 齐鲁工业大学 一种麦草秸秆制备生物机械本色浆的方法
CN109577072B (zh) * 2018-12-29 2019-12-06 齐鲁工业大学 一种麦草秸秆制备生物机械原色浆的方法
SI3683357T1 (sl) 2019-01-15 2021-08-31 Papierfabrik Meldorf GmbH & Co. Komanditgesellschaft Večslojni papir, ki vsebuje reciklirana vlakna papirja in trave
CN109777605A (zh) * 2019-03-05 2019-05-21 北京同仁堂安徽中药材有限公司 一种核桃油的制备方法及其螺旋榨油装置
CN110158354A (zh) * 2019-04-02 2019-08-23 赵吉庆 一种造纸用含有香味的施胶剂制备方法
CN110244028A (zh) * 2019-05-23 2019-09-17 岳阳林纸股份有限公司 一种快速检测叩解度的方法
CN112391866A (zh) * 2019-08-19 2021-02-23 桂林奇峰纸业有限公司 一种使用蔗渣浆生产食品包装纸的方法
EP3808896B1 (de) * 2019-10-16 2021-12-01 Papierfabrik Meldorf GmbH & Co. Kommanditgesellschaft Verfahren zum herstellen von altpapier- und grasfasern enthaltendem papier
CN110693372B (zh) * 2019-10-18 2022-03-29 重庆理文卫生用纸制造有限公司 一种本色高湿强面巾纸及其生产工艺
CN112080963A (zh) * 2020-09-09 2020-12-15 泗县舒怡纸品有限公司 一种高韧性干湿两用的卫生纸及其加工工艺
CN112030606A (zh) * 2020-09-09 2020-12-04 泗县舒怡纸品有限公司 一种环保可降解的卫生纸及其加工工艺
CN111996833A (zh) * 2020-09-22 2020-11-27 惠州市源江印刷有限公司 一种防水防油多重定位的印刷纸制作方法
MX2023005251A (es) * 2020-11-06 2023-07-12 Kimberly Clark Co Pulpa no leñosa de alto brillo.
CN112593447A (zh) * 2020-12-08 2021-04-02 陕西科技大学 一种利用固体废物生产绒面纸的方法
CN112695570A (zh) * 2020-12-25 2021-04-23 牡丹江恒丰纸业股份有限公司 一种抗菌食品擦拭纸的制备方法
CN112761013A (zh) * 2020-12-31 2021-05-07 齐鲁工业大学 一种热蒸汽协同生物酶处理麦草制备本色生物机械浆及副产物全利用的方法
BR102021013935A2 (pt) * 2021-07-15 2023-01-24 Klabin S.A. Papel dispersível, processo de produção do mesmo, embalagem e uso do dito papel
CN113914137B (zh) * 2021-10-12 2023-08-29 陶创 一种蔗渣浆生产低定量食品包装原纸的方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1036304A (en) * 1973-05-01 1978-08-15 Sadayoshi Watanabe Process for producing paper-making pulps from grasses
CN87103977A (zh) * 1987-06-03 1988-04-06 西北轻工业学院 用全麦草制造1号箱纸板
CN1074259A (zh) * 1992-12-24 1993-07-14 湖北省丹江口市第一造纸厂 一种龙须草代替木浆生产防锈原纸的方法
CN101082187A (zh) * 2007-08-03 2007-12-05 山东泉林纸业有限责任公司 一种禾草类未漂化学浆的氧脱木素处理方法
CN101089291A (zh) * 2007-08-03 2007-12-19 山东泉林纸业有限责任公司 一种以禾草类植物为原料制备的漂白化学浆及其制备方法
CN101089292A (zh) * 2007-08-03 2007-12-19 山东泉林纸业有限责任公司 一种以稻草和麦草为原料的纸浆及其制备方法

Family Cites Families (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1347979A (en) * 1919-05-05 1920-07-27 Ernest E Werner Method of treating straw and the like for making paper-pulp
US1534236A (en) * 1922-11-07 1925-04-21 Felix R Wiesner Industrial utilization of strawlike materials
US2164192A (en) * 1933-06-23 1939-06-27 Ben O Zillman Method of making paper from wheat, oat, or rye straw
US2388592A (en) * 1940-03-21 1945-11-06 Defibrator Ab Process of making ligno-cellulose pulps from straw
NL147891C (zh) * 1949-07-29
US2686120A (en) * 1952-01-14 1954-08-10 Ontario Paper Co Ltd Alkaline pulping of lignocellulose in the presence of oxygen to produce pulp, vanillin, and other oxidation products of lignin substance
NL217392A (zh) * 1956-05-24
GB1400879A (en) * 1972-07-03 1975-07-16 Clupak Inc Production of high strength packaging papers from straw
NL7311586A (nl) * 1973-08-22 1975-02-25 Inst Voor Bewaring Werkwijze voor het verwerken van cellulosevezels en lignien bevattende plantaardige materialen.
IT1209352B (it) * 1980-09-22 1989-07-16 Nardi Franco Processo per la produzione di cellulose chimiche e/o paste per carte, nonche'impianto e relativi componenti per l'attuazione del processo indicato
US4384920A (en) * 1981-04-06 1983-05-24 The Black Clawson Company Method and apparatus for oxygen delignification
CN1006315B (zh) * 1987-12-14 1990-01-03 潍坊造纸总厂 一种用草、木浆作纤维原料的高填料造纸工艺
CN1036304A (zh) 1988-03-31 1989-10-11 德方·斯泰方·葛西高 记录、储存、处理和复制图形符号的方∴和便携式装置
US4889591A (en) * 1988-05-27 1989-12-26 Process Evaluation And Development Corporation Crotalaria juncea paper pulps
CN1042958A (zh) * 1988-11-25 1990-06-13 河南省淮阳县造纸厂 全麦草中档卫生纸制造方法
CN1060690A (zh) * 1990-10-05 1992-04-29 青州铝箔纸总厂 一种真空镀铝卷烟包衬纸
US5137600A (en) * 1990-11-01 1992-08-11 Kimberley-Clark Corporation Hydraulically needled nonwoven pulp fiber web
DK170289B1 (da) * 1993-02-02 1995-07-24 Stein Gaasland Fremgangsmåde til frigørelse af de cellulosebaserede fibre i strå fra hinanden og støbemasse til plastisk formning af celluloseholdige fiberprodukter
US5656129A (en) * 1995-05-31 1997-08-12 Masonite Corporation Method of producing fibers from a straw and board products made therefrom
CN1115816A (zh) * 1995-06-20 1996-01-31 吴南松 棉秆制浆的方法
PL184356B1 (pl) * 1996-04-12 2002-10-31 Marlit Ltd Sposób wytwarzania lignocelulozowych materiałów złożonych
CN1165888A (zh) * 1997-01-10 1997-11-26 德州沪平永发造纸有限公司 亚铵法草浆生产胶版印刷纸
US20010023749A1 (en) * 1997-10-07 2001-09-27 Weyerhaeuser Company Method for processing straw pulp
CN100417500C (zh) * 1998-06-17 2008-09-10 尼勒纤维纸浆和纸公司 芦竹浆、纸制品、以及刨花板
US20030029589A1 (en) * 1998-06-17 2003-02-13 Nile Fiber Pulp & Paper, Inc. Total chlorine free bleaching of Arundo donax pulp
JP2001200459A (ja) * 1999-11-09 2001-07-27 Mitsubishi Paper Mills Ltd 流水崩壊性を有する清拭用不織布およびその製造方法
CN1105801C (zh) * 1999-11-22 2003-04-16 黑龙江省兴凯湖造纸厂 稻草浆中、高档文化用纸及工艺
KR20010077423A (ko) * 2000-02-01 2001-08-20 방윤혁 볏짚을 이용한 재생 셀룰로오스 섬유의 제조 방법
CN1083918C (zh) * 2000-02-02 2002-05-01 陈聚恒 超短周期杨树、落叶松热喷磨木制浆造纸工艺
RU2249636C2 (ru) * 2000-06-29 2005-04-10 СиПи ЭНД Пи КО., Лтд. Способ получения целлюлозной массы из стеблей кукурузы
CN1306124A (zh) 2001-03-20 2001-08-01 张国兴 擦手纸生产工艺
US20030070779A1 (en) * 2001-04-23 2003-04-17 Bransby David I. Process for producing pulp and energy from grassland cropping systems
JP2002363882A (ja) * 2001-06-06 2002-12-18 Onda Akio 印刷用バガス紙とその製造方法。
JP2003082592A (ja) * 2001-09-11 2003-03-19 Onda Akio ゴミゼロシステムによる非木材材パルプの製造方法
US7081184B2 (en) * 2002-05-15 2006-07-25 Weyerhaeuser Company Process for making a very low COD unbleached pulp
WO2003097930A1 (en) * 2002-05-15 2003-11-27 Weyerhaeuser Company Process for producing very low cod unbleached pulp
US20030213569A1 (en) * 2002-05-15 2003-11-20 Brian Wester Very low COD unbleached pulp
US6923887B2 (en) * 2003-02-21 2005-08-02 Alberta Research Council Inc. Method for hydrogen peroxide bleaching of pulp using an organic solvent in the bleaching medium
US20040256065A1 (en) * 2003-06-18 2004-12-23 Aziz Ahmed Method for producing corn stalk pulp and paper products from corn stalk pulp
CN1590641A (zh) * 2003-09-04 2005-03-09 镇江金河纸业有限公司 漂白硫酸盐苇木混合浆的生产工艺
CN1598139A (zh) 2003-09-16 2005-03-23 梁立 一种抗菌消毒擦手纸及其加工方法
JP2006037330A (ja) * 2004-06-22 2006-02-09 Mitsubishi Paper Mills Ltd 柔細胞繊維含有紙
CN1587503A (zh) * 2004-09-13 2005-03-02 葛文宇 物理破析与生物降解相结合的草浆生产工艺技术
CN1621613A (zh) * 2005-01-06 2005-06-01 李林山 环保型原色卫生纸的生产方法
WO2006083605A2 (en) * 2005-01-28 2006-08-10 Board Of Regents University Of Nebraska-Lincoln High quality and long natural cellulose fibers from rice straw and method of producing rice straw fibers
CN101163578A (zh) * 2005-03-11 2008-04-16 路易斯安那州州立大学及农业机械学院管理委员会 用于纤维素分离的化学氧化
CN1920169A (zh) * 2006-09-18 2007-02-28 同济大学 一种以互花米草为原料进行苏打蒽醌蒸煮制造纸浆的方法
WO2009015556A1 (fr) * 2007-07-27 2009-02-05 Shandong Tralin Paper Co., Ltd Procédé de production de pâtes à papier à partir d'herbes et pâtes obtenues par le procédé
WO2009015555A1 (fr) * 2007-07-27 2009-02-05 Shandong Tralin Paper Co., Ltd Pâte à papier à base d'herbe utilisée dans la fabrication du papier et son procédé de préparation
US20090090478A1 (en) * 2007-10-05 2009-04-09 Hollomon Martha G Selectivity improvement in oxygen delignification and bleaching of lignocellulose pulp using singlet oxygen
WO2009056017A1 (fr) * 2007-10-29 2009-05-07 Shandong Tralin Paper Co., Ltd Procédé pour une utilisation complète de tiges de plante de type herbe
EP2224059B1 (en) * 2007-12-05 2014-09-10 Shandong Fuyin Paper & Environmental Protection Technology Co., Ltd Grass type unbleached paper products and production method thereof
CA2749168C (en) * 2008-12-09 2017-09-12 Shandong Fuyin Paper & Environmental Protection Technology Co., Ltd A base paper, the preparation method and use thereof
US8080129B2 (en) * 2009-11-17 2011-12-20 Naila Yaqoob Environmentally benign TCF bleaching sequences for AS/AQ wheat straw pulp

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1036304A (en) * 1973-05-01 1978-08-15 Sadayoshi Watanabe Process for producing paper-making pulps from grasses
CN87103977A (zh) * 1987-06-03 1988-04-06 西北轻工业学院 用全麦草制造1号箱纸板
CN1074259A (zh) * 1992-12-24 1993-07-14 湖北省丹江口市第一造纸厂 一种龙须草代替木浆生产防锈原纸的方法
CN101082187A (zh) * 2007-08-03 2007-12-05 山东泉林纸业有限责任公司 一种禾草类未漂化学浆的氧脱木素处理方法
CN101089291A (zh) * 2007-08-03 2007-12-19 山东泉林纸业有限责任公司 一种以禾草类植物为原料制备的漂白化学浆及其制备方法
CN101089292A (zh) * 2007-08-03 2007-12-19 山东泉林纸业有限责任公司 一种以稻草和麦草为原料的纸浆及其制备方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2224059A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8808501B2 (en) 2005-06-23 2014-08-19 The Procter & Gamble Company Methods for individualizing trichomes
US20110226430A1 (en) * 2010-01-14 2011-09-22 Khosrow Parviz Mohammadi Soft and strong fibrous structures and methods for making same

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