CN101760981A - Low-whiteness mixed pulp and paper containing the same - Google Patents
Low-whiteness mixed pulp and paper containing the same Download PDFInfo
- Publication number
- CN101760981A CN101760981A CN200810173093A CN200810173093A CN101760981A CN 101760981 A CN101760981 A CN 101760981A CN 200810173093 A CN200810173093 A CN 200810173093A CN 200810173093 A CN200810173093 A CN 200810173093A CN 101760981 A CN101760981 A CN 101760981A
- Authority
- CN
- China
- Prior art keywords
- pulp
- paper
- whiteness
- straw
- straw pulp
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Abstract
The invention relates to a low-whiteness mixed pulp and paper containing the same. The whiteness of the low-whiteness straw pulp is within 30 to 60%, the preferential whiteness is within 35 to 55%, the more preferential whiteness is within 38 to 50%, and the most preferential whiteness is within 40 to 45%. The invention adopts the low-whiteness straw pulp to match other industrial paper pulp; the low-whiteness straw pulp is not bleached, which not only changes the white appearance of the traditional paper into yellow (the yellow color can lead people to form an optimal visual environment) and leads the color to be soft as well as beautiful, but also reduces stimulation to eyes by intense reflecting light, thereby lessening visual fatigue and injury to the eyes of a user when in reading and writing. Moreover, the comprehensive performance of the low-whiteness straw pulp is not lowered due to that the straw pulp is not bleached; on the contrary, some performances of the low-whiteness straw pulp are enhanced; therefore, the comprehensive performance of the low-whiteness straw pulp is improved and the performance of the paper is also improved (for example, the looseness, opacity, air permeability and the like), thereby enhancing the deflection of the paper and the like.
Description
Technical field
The invention belongs to the paper pulp papermaking technology, particularly a kind of mixed pulp of low whiteness and contain the paper of this mixed pulp.
Background technology
In recent years, the cultural printing on the China market more and more tends to high whiteness, and makes every effort to pure white, ultrawhite and high brightness development.For making white paper more attractive in appearance, or be fit to certain special purposes, generally all will in the paper pulp of papermaking, add a large amount of fluorescent whitening agents and indigo plant, cudbear etc., with the brightness and the aesthetics of raising paper.
Many consumers have a hunch that also blank sheet of paper gets over Bai Yuehao when choosing blank sheet of paper." in fact, this is the understanding of a mistake, and blank sheet of paper is not to get over Bai Yuehao." relevant expert represents that paper affects one's power of vision very much in vain easily, and some producers often add fluorescer in a large number in order to pursue paper of whiteness, not only can pollute, and also human body are had injury.At present, national correlation department has entrusted China National Pulp ﹠ Paper Research Institute to set about drafting paper product whiteness standard, and this standard will be set a upper limit to the whiteness of paper product, and the paper product that surpasses the upper limit will be regarded as substandard product.Estimate that this standard will put into effect next year.
It is introduced that for pursuing the whiteness of blank sheet of paper, some producers are a large amount of optical bleaching agents that add in manufacturing process, the result is contaminated environment not only, also human body is damaged.According to the woods doctor of Chengdu City No.1 People's Hospital introduction, after fluorescer is absorbed by the body, can with the combined with protein in the human body, just be difficult to be decomposed out, have only the ferment by liver to decompose, it could be excreted, but this can increase the weight of the burden of liver.And if health has wound, fluorescer also can with the combined with protein of wound, hinder the healing of wound.Simultaneously, fluorescent material can make cell morph, and toxicity is accumulated in liver or other vitals, becomes potential carcinogenic factor.
In addition, whiteness is too high affects one's power of vision." whiteness of blank sheet of paper is too high, also can affect one's power of vision." the auspicious expression of the Executive Vice Secretary-General Jiang Rong of Shanghai City papermaking association, paper white is spent height, and its reflectivity to light will be big more, and the normal person watched attentively after a period of time, will feel the eyes shouting pain, and is uncomfortable.And adolescent student owing to also be in the puberty, if retina is subjected to the stimulation of whiteness for a long time, will produce bigger influence to eyesight.Simultaneously, modern medicine also thinks, the printed matter that uses high whiteness is harmful to the organs of vision of human body, and is especially more obvious under strong sunlight and accent light stimulate.High light causes eye fatigue easily, and of a specified duration will cause the blurring of image, and ophthalmology diseases such as myopia take place, and is more harmful to the teenager; Under the ordinary ray, the eyes that the reverberation that produces from paper also can the intense stimulus user make the user feel visual fatigue easily, cause the rising of the myopia incidence of disease.And the former pulp brightness of the paper of traditional blank sheet of paper requires to be 70-75%, therefore association with pulp bleaching agent consumption height in paper-making process, chemical reaction is violent, not only increased the difficulty of technology controlling and process, and because used paper magma has been carried out bleaching process, thereby make in its paper magma and contain carcinogens such as bioxin and adsorbable organohalogen compounds, being unfavorable for environmental protection, long-term use can cause potential harm to user's health especially.
Add optical bleaching agent in a large number in order to contain enterprise to pursue whiteness simply; protection consumer's vision health; paper product whiteness standard is just being set about drafting by China National Pulp ﹠ Paper Research Institute; this standard will be set a upper limit to the whiteness of paper product, and the paper product that surpasses the upper limit will be regarded as substandard product.
Simultaneously, domesticly the various cultural papers that whiteness is lower, be similar to " ecru " have been begun to promote the use of." the strong board of giving birth to " myopia preventing book as the Shanghai tissue is developed has obtained outstanding invention silver medal in the 8th whole nation " spark cup " and the outstanding invention award in Shanghai City, and has begun to promote the use of in middle and primary schools.The myopia preventing book dedicated paper that develop in paper mill, Nantong, Jiangsu Province, first product is tried out on Shanghai, Suzhou and other places, and has obtained the attention of the parties concerned.Also provided the preparation technology of the myopia prevention paper of some " yellow " in the prior art, as:
ZL02100388.2 discloses a kind of myopic-preventing exercise-book, contain by use and to freeze yellow G, the light yellow paper of the weld of alkaline bright yellow O, and make used paper manifest brightness is the light yellow of 51%-59%, can reflection wavelength be the coloured light of 500-550NM,, thereby form best visual environment because the colourity of the image of printing on the brightness of this paper and the paper forms enough contrasts, when using this exercise-book to carry out various study and exercise, can play the effect of pre-myopia prevention.
The ZL200410059633.6 Chinese patent discloses a kind of manufacture method of bright yellow myopia prevention health care paper, this method is at first pulverized wheat straw, in wheat straw fiber, add sodium sulfite, NaOH and anthraquinone, and fully mix, said mixture is placed on boiling becomes pulp in the water, slurry after the boiling is sieved, to remove coarse impurities; Add liquid chlorine, NaOH and clorox in the slurry after boiling, heat so that paper pulp is bleached, slurry is pulverized, making its beating degree is 30; Add alkaline bright yellow, acid purple, aluminum sulfate, gum rosin, hydrosulfurous acid wet goods in slurry, thin up paper pulp to adjust the color of paper pulp, according to finished product paper thickness requirement, is layered on paper pulp on the forming net heat drying.Utilize the health care paper of the inventive method preparation, color and luster is bright yellow, and is attractive in appearance but do not lose bright-colouredly, do not hinder eyes.The surface smoothing of paper, and water-fast, oil resistivity good, physical strength and surface strength all reach the writing paper standard.
ZL200410000115.7 relates to a kind of preparation method of colored vision strengthening paper, belongs to pulp technology for making paper.This method is at first pulverized wheat straw, adds sodium sulfite, NaOH and anthraquinone in wheat straw fiber, and fully mixes, and said mixture is placed on boiling becomes pulp in the water, the slurry after the boiling is sieved, to remove coarse impurities; Add liquid chlorine, NaOH and clorox in the slurry after boiling, heat so that paper pulp is bleached, slurry is pulverized, making its beating degree is 30; Add alkaline bright yellow, Viride Nitens, aluminum sulfate, gum rosin and hydrosulfurous acid oil in slurry, thin up paper pulp to adjust the color of paper pulp, according to finished product paper thickness requirement, is layered on paper pulp on the forming net heat drying.Utilize the colored vision strengthening paper of the inventive method preparation, it is faint yellow that color and luster is, attractive in appearance but do not lose bright-colouredly, do not hinder eyes.The surface smoothing of paper, and water-fast, oil resistivity good, physical strength and surface strength all reach the writing paper standard.
From the preparation technology of prior art disclosed " yellow " myopia prevention paper, related " yellow " myopia prevention paper is all used bleached pulp and is prepared in the prior art, and has added yellow class dyestuff in preparation process, as alkaline bright yellow.As seen, the preparation of above-mentioned " yellow " myopia prevention paper needs to add auxiliary material in addition so that the people can form the yellow of best vision environment, makes its complicated process of preparationization undoubtedly, and the more important thing is because used paper pulp is that bleached pulp maybe will pass through bleaching process.As everyone knows, the bleaching process of pulping and paper-making industry is to produce the main source Er of bioxin bioxin is the persistent organochlorine compound of a class, have 30 kinds more than, characteristics with " carcinogenic, teratogenesis, mutagenesis ", long half time, the residence time reaches 10 years, easily, be called as the strongest poisonous substance of toxicity on the earth in the medium-term and long-term accumulation of environment.Undoubtedly, using this paper made from bleached pulp to cause serious threat to its health for a long time, is " the stealthy killer " of human health.
In addition, enterprise adds fluorescent whitening agent in a large number for pursuing whiteness, especially human body is caused huge injury.
For overcoming the defective of above-mentioned prior art; the inventor finds to use the cultural printing do not float other the industrial paper pulp preparations of straw pulp adapted etc. in the research process of being engaged in pulping and paper-making for a long time; not only need not add weld in addition just can make the people form the yellow of best vision environment; play the protection eyes, prevent near-sighted purpose; and can also solve the problem of the health threat that bioxin causes in the prior art well; simultaneously also need not add fluorescent whitening agent, thereby solve fluorescent whitening agent injury that human body brought.
Summary of the invention
The object of the present invention is to provide a kind of low whiteness mixed pulp; this mixed pulp has lower whiteness; adopt this mixed pulp to prepare paper product; need not add weld in addition just can make the people form the yellow of best vision environment; play the protection eyes, prevent near-sighted purpose; and can also solve the problem of the health threat that bioxin causes in the prior art well, also need not add fluorescent whitening agent simultaneously, thereby solve fluorescent whitening agent injury that human body brought.
Second purpose of the present invention is to provide a kind of cultural paper; this cultural paper not only need not add other welds just can make the people form the yellow of best vision environment; play the purpose of protection eyes, control myopia, and the deflection of this cultural paper is good, can print through etc.
The 3rd purpose of the present invention is to provide a kind of paper for daily use.
The 4th purpose of the present invention is to provide a kind of cultural paper or paper for daily use that contains mixed pulp provided by the present invention.
For content of the present invention and technical scheme clearly are described, below earlier noun used in the present invention is defined as follows, under the inconsistent situation of definition that other any documents and the present invention are done, be as the criterion with the definition that the present invention was done, specific as follows:
Low whiteness straw pulp of the present invention is meant the straw pulp that adopts one or more the combination raw materials in straw, wheat straw, Chinese alpine rush, giantreed, bagasse or the reed to obtain through boiling and washing step, and perhaps the whiteness that obtains through boiling, washing and oxygen delignification step is the 30-60% straw pulp.
Be detailed description of the present invention below:
For realizing first purpose of the present invention, the present invention adopts following technical scheme:
A kind of mixed pulp wherein contains low whiteness straw pulp in this mixed pulp, the whiteness of described low whiteness straw pulp is 30-60%, is preferably 35～55%, and more preferably 38～50%, most preferably be 40～45%.
The tensile index of described low whiteness straw pulp is 45-60mN/g, preferred 48-60mN/g, more preferably 50-60mN/g.
The low whiteness straw pulp of consisting of of described mixed pulp: 25-100% and the industrial paper pulp of 0-75%, low whiteness straw pulp and the industrial paper pulp of 5-70%, the more preferably low whiteness straw pulp of 72-91% and the industrial paper pulp of 9-28% of preferred 30-95%; Described industrial paper pulp is one or more in wood pulp, cotton pulp, bamboo pulp or the secondary stock.
The slurry of described low whiteness straw pulp for obtaining through boiling, washing step, the perhaps slurry that obtains through boiling, washing, oxygen delignification step, wherein said boiling is for being that raw material is permanganate number 16-28 through obtaining hardness after the boiling with the grass kind plant, and beating degree is the high-hardness pulp of 10-24 ° of SR.
The bulk of described low whiteness straw pulp is 2-3cm
3/ g is preferably 2.3-2.8cm
3/ g, more preferably 2.4-2.6cm
3/ g; Opacity is 88%-100%, preferred 90%-99%, more preferably 94%-98%; Air permeability is 300-6500ml/min, preferred 500-5500ml/min, more preferably 1000-5000ml/min.
The tear index of described low whiteness straw pulp is 3.5-6.0mNm
2/ g, preferred 4.6-5.6mNm
2/ g, more preferably 4.8-5.4mNm
2/ g.
For realizing second purpose of the present invention, the present invention adopts following technical scheme:
A kind of cultural paper, comprise paper pulp and papermaking auxiliary material, it is characterized in that described paper pulp comprises the industrial paper pulp that does not float straw pulp and 0-75% of 25-100%, the industrial paper pulp that does not float straw pulp and 5-70% of preferred 30-95%, the more preferably industrial paper pulp that does not float straw pulp and 9-28% of 72-91%; Described industrial paper pulp is one or more in wood pulp, cotton pulp, bamboo pulp or the secondary stock; Described whiteness of not floating straw pulp is 30-60%, is preferably 35～55%, more preferably 38～50%, most preferably be 40～45%.
The described tensile index that does not float straw pulp is 45-60mN/g, preferred 48-60mN/g, more preferably 50-60mN/g.
Described bulk of not floating straw pulp is 2-3cm3/g, is preferably 2.3-2.8cm3/g, more preferably 2.4-2.6cm3/g; Opacity is 88%-100%, preferred 90%-99%, more preferably 94%-98%; Air permeability is 300-6500ml/min, preferred 500-5500ml/min, more preferably 1000-5000ml/min.
The described tear index that does not float straw pulp is 3.5-6.0mNm
2/ g, preferred 4.6-5.6mNm
2/ g, more preferably 4.8-5.4mNm
2/ g.
The described straw pulp low whiteness straw pulp more preferably provided by the present invention that do not float.
Described paper is cultural printing, comprises electro-photographic paper, typing paper, offset printing paper, writing paper or newsprint.
Vertical deflection of described electro-photographic paper is 0.3-0.5mNm, and lateral stiffness is 0.15-0.25mNm; The opacity of described typing paper is 80-90%; The opacity of described offset printing paper is 80-90%; The opacity of described writing paper is 80-90%.
Further, the opacity of electro-photographic paper of the present invention is 85%-95%, preferred 88%-95%, more preferably 90%-95%.
Among the present invention, described electro-photographic paper quantitatively be 60-100 gram/rice
2, smoothness is 20-30%.
Electro-photographic paper of the present invention can adopt the conventional method preparation.For improving the combination property of electro-photographic paper, can add some auxiliary materials commonly used, as using modified starch, add with waterglass, modified starch etc. and improve into paper deflection etc. so that it can satisfy the surface strength requirement.
Among the present invention, the used auxiliary material of described electro-photographic paper comprises internal sizing agent, Cypres, talcum powder and waterglass.
Above-mentioned internal sizing agent is rosin, aluminum sulfate; Above-mentioned Cypres is a modified starch.
Above-mentioned rosin consumption is 0.65～0.75%, and the consumption of described aluminum sulfate is 4.5～5.5%, and the consumption of described modified starch is 2～2.5%.
Contain the electro-photographic paper that does not float straw pulp provided by the present invention, with a spot of papermaking auxiliary material its combination property is met the requirements, its performance obviously improves when using a spot of papermaking auxiliary material.
For realizing the 3rd purpose of the present invention, the present invention adopts following technical scheme:
A kind of paper for daily use, comprise paper pulp and papermaking auxiliary material, wherein said paper pulp comprises the industrial paper pulp that does not float straw pulp and 0-75% of 25-100%, the industrial paper pulp that does not float straw pulp and 5-70% of preferred 30-95%, the more preferably industrial paper pulp that does not float straw pulp and 9-28% of 72-91%; Described industrial paper pulp is one or more in wood pulp, cotton pulp, bamboo pulp or the secondary stock; Described whiteness of not floating straw pulp is 30-60%, is preferably 35～55%, more preferably 38～50%, most preferably be 40～45%.
The described tensile index that does not float straw pulp is 45-60mN/g, preferred 48-60mN/g, more preferably 50-60mN/g.
According to foregoing paper for daily use, wherein said paper for daily use is toilet paper, tissue or tissue.
According to foregoing paper for daily use, wherein, the horizontal suction range of described toilet paper is 10～40mm/100s, is preferably 15～38mm/100s, more preferably 20～35mm/100s; The horizontal suction range of described tissue is 10～40mm/100s, is preferably 15～29mm/100s, more preferably 20～25mm/100s; The horizontal suction range of described tissue is 20～45mm/100s, is preferably 25～40mm/100s, more preferably 30～35mm/100s.
According to foregoing paper for daily use, wherein said toilet paper whiteness is 35～58%, is preferably 37～55%, more preferably 40～52%, most preferably be 42～50%; Described tissue whiteness is 35～60%, is preferably 37～58%, more preferably 40～55%, most preferably be 43～53%; Described tissue whiteness is 35～79%, is preferably 40～65%, more preferably 45～60%, most preferably be 50～55%.
According to described paper for daily use, wherein, described toilet paper pliability to average 150～500mN, is preferably 200～450mN, more preferably 250～400mN in length and breadth; Described tissue pliability is preferably 150～400mN, more preferably 200～300mN in length and breadth to average out to 100～450mN; Described tissue is 100～450mN to average pliability in length and breadth, is preferably 150～400mN, more preferably 200～350mN.
According to foregoing paper for daily use, wherein, described toilet paper tensile index is 1.5～4N.m/g, is preferably 1.7～3.5N.m/g, more preferably 2.0～3.0N.m/g; Described tissue is 45～250N/m to average tensile strength in length and breadth, is preferably 50～200N/m, more preferably 60～150N/m; The horizontal tensile index of described tissue is 1～2.5N.m/g, is preferably 1.5～2.3N.m/g, more preferably 1.7～2N.m/g.
For realizing the 4th purpose of the present invention, the present invention adopts following technical scheme:
A kind of cultural paper or paper for daily use, wherein, described cultural paper or paper for daily use contain above-mentioned mixed pulp provided by the present invention.
Contain low whiteness straw pulp in the described mixed pulp, the whiteness of described low whiteness straw pulp is 30-60%, is preferably 35～55%, more preferably 38～50%, most preferably be 40～45%.
The tensile index of described low whiteness straw pulp is 45-60mN/g, preferred 48-60mN/g, more preferably 50-60mN/g.
The low whiteness straw pulp of consisting of of described mixed pulp: 25-100% and the industrial paper pulp of 0-75%, low whiteness straw pulp and the industrial paper pulp of 5-70%, the more preferably low whiteness straw pulp of 72-91% and the industrial paper pulp of 9-28% of preferred 30-95%; Described industrial paper pulp is one or more in wood pulp, cotton pulp, bamboo pulp or the secondary stock.
The slurry of described low whiteness straw pulp for obtaining through boiling, washing step, the perhaps slurry that obtains through boiling, washing, oxygen delignification step, wherein said boiling is for being that raw material is permanganate number 16-28 through obtaining hardness after the boiling with the grass kind plant, and beating degree is the high-hardness pulp of 10-24 ° of SR.
The bulk of described low whiteness straw pulp is 2-3cm
3/ g is preferably 2.3-2.8cm
3/ g, more preferably 2.4-2.6cm
3/ g; Opacity is 88%-100%, preferred 90%-99%, more preferably 94%-98%; Air permeability is 300-6500ml/min, preferred 500-5500ml/min, more preferably 1000-5000ml/min.
The tear index of described low whiteness straw pulp is 3.5-6.0mNm
2/ g, preferred 4.6-5.6mNm
2/ g, more preferably 4.8-5.4mNm
2/ g.
Described paper is cultural printing, comprises electro-photographic paper, typing paper, offset printing paper, writing paper or newsprint.
The whiteness of described electro-photographic paper, typing paper, offset printing paper, writing paper or newsprint is 45-70%.
Vertical deflection of described electro-photographic paper is 0.3-0.5mNm, and lateral stiffness is 0.15-0.25mNm; The opacity of described typing paper is 80-90%; The opacity of described offset printing paper is 80-90%; The opacity of described writing paper is 80-90%.
Further, the opacity of electro-photographic paper of the present invention is 85%-95%, preferred 88%-95%, more preferably 90%-95%.
Among the present invention, described electro-photographic paper quantitatively be 60-100 gram/rice
2, smoothness is 20-30%.
Electro-photographic paper of the present invention can adopt the conventional method preparation.For improving the combination property of electro-photographic paper, can add some auxiliary materials commonly used, as using modified starch, add with waterglass, modified starch etc. and improve into paper deflection etc. so that it can satisfy the surface strength requirement.
Among the present invention, the used auxiliary material of described electro-photographic paper comprises internal sizing agent, Cypres, talcum powder and waterglass.
Above-mentioned internal sizing agent is rosin, aluminum sulfate; Above-mentioned Cypres is a modified starch.
Above-mentioned rosin consumption is 0.65～0.75%, and the consumption of described aluminum sulfate is 4.5～5.5%, and the consumption of described modified starch is 2～2.5%.
Contain the electro-photographic paper that does not float straw pulp provided by the present invention, with a spot of papermaking auxiliary material its combination property is met the requirements, its performance obviously improves when using a spot of papermaking auxiliary material.
Low whiteness straw pulp of the present invention or do not float straw pulp and can be prepared as follows:
1, Ammonium Sulfite Method:
(1) add steaming preparation in the dogstail raw material of removing impurity, wherein the consumption of ammonium sulfite is over dry material quantity 9-20%, joins the 0-15% that amount of sodium hydroxide is the over dry material quantity, and liquor ratio is 1: 2-9;
(2) feed Steam Heating, heating-up temperature is 120-250 ℃, and be 100-250 minute heat time heating time, and then obtain described low whiteness straw pulp or do not float straw pulp through shove, pulp washing.
Wherein can be preferably:
(1) add cooking liquor in the grass kind plant raw material, wherein the ammonium sulfite consumption is the 9-13% to the over dry material quantity, joins the 0-8% that amount of sodium hydroxide is the over dry material quantity, and liquor ratio is 1: 2-4;
(2) heat temperature raising is to temperature 165-173 ℃, omnidistance time 160-210 minute of boiling, and then obtain described low whiteness straw pulp or do not float straw pulp through shove, pulp washing.Obtaining low brightness pulp or not floating the straw pulp permanganate number is 16～28, preferred 16～25.
2, soda processes:
Alkali number 6～14, liquor ratio 1: 8～1: 2, idle running 20～60min, pressure 400～550kPa, temperature 110～180, digestion time 90～140min, and then obtain described low whiteness straw pulp or do not float straw pulp through shove, pulp washing.
3, caustic soda-anthraquinone method:
(1) in the grass kind plant raw material, add cooking liquor, wherein alkali charge in NaOH to over dry material quantity 9-20%, liquor ratio is 1: 2-10, the anthraquinone addition is the 0.5-2.0 ‰ of over dry material quantity;
(2) heat temperature raising is to temperature 120-200 ℃, omnidistance time 100-250 minute of boiling, and then obtain described low whiteness straw pulp or do not float straw pulp through shove, pulp washing.
Wherein can be preferably:
(1) in the grass kind plant raw material, add cooking liquor, wherein alkali charge in NaOH to over dry material quantity 7-15%, liquor ratio is 1: 2-4, the anthraquinone addition is the 0.5-0.8 ‰ of over dry material quantity;
(2) heat temperature raising is to temperature 160-165 ℃, omnidistance time 140-190 minute of boiling, and then obtain described low whiteness straw pulp or do not float straw pulp through shove, pulp washing.Obtaining low brightness pulp or not floating the straw pulp permanganate number is 16～28, preferred 16～25.
4, sulfate process
(1) in the grass kind plant raw material, add cooking liquor, wherein alkali charge be the NaOH meter to over dry material quantity 5-15%, liquor ratio is 1: 2-10, sulphidity are 3-15%;
(2) heat temperature raising is to temperature 150-200 ℃, omnidistance time 100-250 minute of boiling, and then obtain described low whiteness straw pulp or do not float straw pulp through shove, pulp washing.
Wherein can be preferably:
(1) in the grass kind plant raw material, add cooking liquor, wherein alkali charge be the NaOH meter to over dry material quantity 8-11%, liquor ratio is 1: 2-4, sulphidity are 5-8%;
(2) heat temperature raising is to temperature 165-173 ℃, omnidistance time 150-200 minute of boiling, and then obtain described low whiteness straw pulp or do not float straw pulp through shove, pulp washing.Obtaining low brightness pulp or not floating the straw pulp permanganate number is 16～28, preferred 16～25.
5, alkaline sodium sulfite-anthraquinone boiling comprises:
(1) add cooking liquor in the dogstail raw material, wherein, sodium hydroxide concentration is counted 9-15% with the over dry raw material weight, and sodium sulfite is 2-30%, and anthraquinone is 0.03-0.08%, and the cooking liquor ratio is 1: 2.5-1: 6;
(2) heat temperature raising is to temperature 150-180 ℃, omnidistance time 95-190 minute of intensification, little venting, insulation, and then obtain described low whiteness straw pulp or do not float straw pulp through shove, pulp washing.
Method for optimizing comprises:
(1) add cooking liquor in the dogstail raw material, wherein, sodium hydroxide concentration is counted 9-15% with the over dry raw material weight, and sodium sulfite is 2-6%, and anthraquinone is 0.4-0.08%, and the cooking liquor ratio is 1: 3-4;
Heat temperature raising is to temperature 160-165 ℃, omnidistance time 140-190 minute of intensification, little venting, insulation, and then obtain described low whiteness straw pulp or do not float straw pulp through shove, pulp washing.
Obtaining low brightness pulp or not floating the straw pulp permanganate number is 16～28, preferred 16～25.
Above-mentioned low whiteness straw pulp or do not float straw pulp also can be according to the preparation of following method:
1, Ammonium Sulfite Method:
The grass raw material is added in the pot, add cooking liquor again, cooking liquor is warming up to 100-200 ℃, boost to 0.3-0.9MPa, digestion time is 150-250 minute, in the described steaming preparation, wherein the ammonium sulfite consumption is the 5-20% to the over dry material quantity, join the 0-15% that amount of sodium hydroxide is the over dry material quantity, liquor ratio is 1: 2-15, and then obtain described low whiteness straw pulp or do not float straw pulp through shove, pulp washing.
Wherein can be preferably:
The grass raw material is added in the pot, add cooking liquor again, cooking liquor is warming up to 156-173 ℃, boost to 0.6-0.75MPa, digestion time is 180-220 minute, in the described steaming preparation, wherein the ammonium sulfite consumption is the 9-15% to the over dry material quantity, join the 0-8% that amount of sodium hydroxide is the over dry material quantity, liquor ratio is 1: 6-10, and then obtain described low whiteness straw pulp or do not float straw pulp through shove, pulp washing.
Obtaining low brightness pulp or not floating the straw pulp permanganate number is 16～28, preferred 16～25.
2, caustic soda-anthraquinone method:
The grass kind plant raw material is gone in the digester, after the dress pot is full, close pot cover, boiling temperature is 100-200 ℃, boost to 0.3-0.9MPa simultaneously, digestion time is 150-250 minute, in the described steaming preparation, alkali charge is to over dry material quantity 5-20% in NaOH, liquor ratio is 1: 2-15, the anthraquinone addition is the 0.2-1.5 ‰ of over dry material quantity, and then obtains described low whiteness straw pulp or do not float straw pulp through shove, pulp washing.
Wherein can be preferably:
The grass kind plant raw material is gone in the digester, after the dress pot is full, close pot cover, boiling temperature is 147-165 ℃, boost to 0.4-0.6MPa simultaneously, digestion time is 160-220 minute, in the described steaming preparation, alkali charge is to over dry material quantity 9-17% in NaOH, liquor ratio is 1: 6-9, the anthraquinone addition is the 0.5-0.8 ‰ of over dry material quantity, and then obtains described low whiteness straw pulp or do not float straw pulp through shove, pulp washing.
Obtaining low brightness pulp or not floating the straw pulp permanganate number is 16～28, preferred 16～25.
3, kraft cooking is:
The grass kind plant raw material is gone in the digester, after the dress pot is full, close pot cover, boiling temperature is 100-200 ℃, boost to 0.3-0.9MPa simultaneously, digestion time is 150-280 minute, in the described steaming preparation, alkali charge is that the NaOH meter is to over dry material quantity 5-20%, liquor ratio is 1: 5-15, sulphidity are 3-15%, and then obtain described low whiteness straw pulp or do not float straw pulp through shove, pulp washing.
Wherein can be preferably:
The grass kind plant raw material is gone in the digester, after the dress pot is full, close pot cover, boiling temperature is 155-168 ℃, boost to 0.5-0.65MPa simultaneously, digestion time is 200-250 minute, in the described steaming preparation, alkali charge is that the NaOH meter is to over dry material quantity 8-13%, liquor ratio is 1: 6-10, sulphidity are 5-9%, and then obtain described low whiteness straw pulp or do not float straw pulp through shove, pulp washing.
Obtaining low brightness pulp or not floating the straw pulp permanganate number is 16～28, preferred 16～25.
4, alkaline sodium sulfite-anthraquinone boiling comprises:
The grass raw material is added in the pot, add cooking liquor again, cooking liquor is warming up to 80-250 ℃, boost to 0.3-0.8MPa, heat up, be incubated and be replaced into 110-300 minute, in the described steaming preparation, wherein the consumption of NaOH is counted 9-17% with the over dry raw material weight, the consumption of sodium sulfite is the 4-30% of over dry raw material weight, and the consumption of anthraquinone is the 0.03-0.08% of over dry raw material weight, and liquor ratio is 1: 2.5-10; It preferably adds the grass raw material in the pot, add cooking liquor again, cooking liquor is warming up to 100-200 ℃, boost to 0.4-0.65MPa, heat up, be incubated and be replaced into 150-250 minute, in the described steaming preparation, wherein the consumption of NaOH is counted 9-17% with the over dry raw material weight, the consumption of sodium sulfite is the 4-8% of over dry raw material weight, the consumption of anthraquinone is the 0.04-0.08% of over dry raw material weight, liquor ratio is 1: 6-10, and then obtain described low whiteness straw pulp or do not float straw pulp through shove, pulp washing.
Can also comprise before the boiling step of said method the grass raw material is carried out pretreated process, be i.e. the process that grass type stalk is flooded.Preferably, make the maceration extract ratio reach 1: 2-4.Dip time and temperature can be adjusted according to used grass type stalk, and this adjustment is conspicuous to those skilled in the art.Yet, preferably insulation and mixing 10 minutes or the longer time in the spiral macerator under 85 ℃ or higher temperature under normal pressure.More preferably insulation mixed 10-40 minute between 85-95 ℃, and maceration extract is fully contacted with raw material, made the dipping of raw material evenly complete.Before raw material is flooded, can adopt prior art that raw material is carried out preliminary treatment, promptly adopt conventional dried, wet feed preparation, to remove impurity such as defoliation, fringe, grain, marrow, can alleviate the pressure of subsequent technique like this, and improve the quality of straw pulp.Dried, wet feed preparation can adopt existing conventional equipment, as chaffcutter, screening machine, dust removal machine, wet scrubbing Straw-crumbling machine, inclined screw Water Extraction Machinery etc.Fibers in grass class raw material through the removal moisture after getting the raw materials ready also can be fine fodder, and the moisture of deduction dogstail is the over dry grass, and the length of general blade is at 15-30mm, and the technology of getting the raw materials ready of raw material is technology as well known to those skilled in the art.
Also can add the oxygen delignification process after the boiling of said method or behind the pulp washing, wherein the oxygen delignification process is preferably:
1) concentration of gained high-hardness pulp after the adjusting boiling;
2) this stock pump is delivered to the oxygen delignification reaction tower, and add NaOH and oxygen;
3) this slurry carries out the oxygen delignification reaction in this oxygen delignification reaction tower.
The concentration of gained high-hardness pulp is meant that the concentration adjustment with described slurry is 8-18% after the described adjusting boiling, that is to say, preferably in carry out oxygen delignification under the dense condition.In the major advantage of dense oxygen delignification be: invest less; Since in the success of dense mixing and pumping technology, the processing of slurry is dense more much easier than high; Slurry concentration is lower, and the corrosion of equipment is few, also the danger of not burning in oxygen.
Described oxygen delignification is preferably the single hop oxygen delignification, carries out in the oxygen delignification reaction tower.In the oxygen delignification process, described slurry is preferably 95-100 ℃ in the temperature of this reaction tower import department, and pressure is preferably 0.9-1.2MPa, and the temperature in exit is preferably 100-105 ℃, and pressure is preferably 0.2-0.4MPa.
Alkali charge is preferably in the 2-4% of NaOH to the oven dry stock amount in the described oxygen delignification, and the addition of oxygen is preferably slurry 20-40kg per ton; The reaction time of described slurry in this reaction tower is preferably 60-90 minute.
Preferably paper pulp is carried and is heated to 70 ℃ before the described oxygen delignification and deliver to a slurry pipe.
The preferred magnesium salts of oven dry stock weight 0.2-1% that adds is as protective agent in the described oxygen delignification process.
Starch degree behind the oxygen delignification is preferably permanganate number 10-14, is equivalent to the high-hardness pulp of card uncle valency 13-19.8.
More preferably, the starch degree that obtains after the oxygen delignification reaction is permanganate number 11-13, and being equivalent to card uncle valency is 14.5-17.9.
Adopt the low whiteness straw pulp of method for preparing or the superior performance of not floating straw pulp; not only whiteness is low; and air permeability height; not only whiteness is low thereby adopt the low whiteness straw pulp of the inventive method preparation or do not float the paper of straw pulp preparation; reduce the stimulation of light, play the effect of protection eyes eyes, and not bleaching; reduced the health threat problem to human body, prepared in addition paper also has the air permeability advantages of higher.
The present invention is below described in further detail:
Contain low whiteness straw pulp in the mixed pulp provided by the present invention.
Because there are a lot of shortcomings in papermaking straw pulp, and is poor as the slurry water filtering performance; Break end easily during paper machine making; Paper strength is lower, and especially the elongation when tear index, folding strength, fracture is all quite low, the obvious embrittlement of paper; Surface strength of paper is low, falls hair etc. when being used to print easily, thereby has limited the application of straw pulp greatly.The inventor is surprised to find that when being furnished with low whiteness straw pulp of the present invention in the mixed pulp, not only can improve paper pulp manufacture paper with pulp performance, improve paper quality, and because the not process bleaching of this low whiteness straw pulp, not only reduced pulping process, saved the time, also do not contain carcinogens such as bioxin and adsorbable organohalogen compounds, combination property that the more important thing is this low whiteness straw pulp is not because the corresponding reduction without bleaching, opposite some performance has also strengthened, as bulk, opacity and air permeability etc., thereby its combination property is improved.
Among the present invention, the whiteness of described low whiteness straw pulp is 30-60%, is preferably 35～55%, more preferably 38～50%, most preferably be 40～45%.
Enterprise often adds fluorescent whitening agent in a large number for pursuing whiteness, is not to get over Bai Yuehao but the fact shows paper, and the opposite more high meeting of whiteness affects one's power of vision, and the adding of fluorescent whitening agent has also brought potential harm to human body.Although the cream-coloured coloured paper of existing vision protection occurs, what use in its preparation process is bleaching straw pulp, and has added some class welds, has also brought threat for the health of human body.The inventor finds that adapted low whiteness straw pulp provided by the present invention need not add weld, just can form the yellow of best vision environment.
Among the present invention, the tensile index of described low whiteness straw pulp is 45-60mN/g, preferred 48-60mN/g, more preferably 50-60mN/g.
Grass as raw material is because fibre length is little, heteroproteose cell is many, generally scurry the problem relatively poor in toughness, that fragility is bigger after becoming paper, can reduce the fragility of paper to a certain extent or the development trend of fragility is relaxed to some extent by reasonably combined lumber fibre in grass fiber.
Under the situation of the reasonably combined lumber fibre of grass fiber, the inventor finds to adopt the reasonably combined lumber fibre of low whiteness straw pulp than the fragility that can reduce paper with bleaching straw pulp collocation lumber fibre more.
Among the present invention, the bulk of described low whiteness straw pulp is 2-3cm
3/ g is preferably 2.3-2.8cm
3/ g, more preferably 2.4-2.6cm
3/ g; Opacity is 88%-100%, preferred 90%-99%, more preferably 94%-98%; Air permeability is 300-6500ml/min, preferred 500-5500ml/min, more preferably 1000-5000ml/min.
Find that the whiteness of low whiteness straw pulp provided by the present invention is obviously low than the whiteness of bleaching straw pulp though the inventor is unexpected, because reduce without bleaching, some performance has not also strengthened other performance on the contrary, as bulk, opacity and air permeability.
As seen, although this low whiteness straw pulp provided by the present invention is because it reduces its whiteness without crossing bleaching, but other performance is not because the corresponding reduction without bleaching, opposite some performance has also strengthened, as bulk, opacity and air permeability etc., thereby its combination property is improved, the raising of combination property directly makes its paper performance of manufacturing paper with pulp improve, raising as bulk, the deflection of paper is improved, thereby can waltz through equipment such as duplicator or printer, avoid occurring paper jam phenomenon; Opaque raising makes the opaque also corresponding raising of paper, thereby avoids occurring the phenomenon of print through; The raising of air permeability makes the water filtering performance of straw pulp obtain this solarization, and dewatering efficiency improves, thereby improves the paper machine speed when manufacturing paper with pulp.
Wood pulp of the present invention, bamboo pulp, cotton pulp or secondary stock are that natural color pulp is or/and bleached pulp.
Wood pulp among the present invention, bamboo pulp, cotton pulp or secondary stock can be used natural color pulp, also available bleached pulp, and the mixed pulp of also available natural color pulp and bleached pulp can both realize the present invention.But preferably adopt the mixed pulp of natural color pulp and bleached pulp, more preferably all adopt natural color pulp.And in the mixed pulp of natural color pulp and bleached pulp, again based on natural color pulp, with addition of a spot of bleached pulp.
Wood pulp, bamboo pulp, cotton pulp or secondary stock also noxious material such as Hui bioxin in bleaching process.The natural color pulp of the preferred wood pulp of the present invention, bamboo pulp, cotton pulp or secondary stock and the mixed pulp of bleached pulp more preferably all adopt the natural color pulp of wood pulp, bamboo pulp, cotton pulp or secondary stock.Paper provided by the present invention so just adopts natural color pulp fully, in the whole process fully without bleaching, do not contain carcinogens such as bioxin and adsorbable organohalogen compounds, long-term use can not threaten to people's health, is the paper of a kind of overall safety, health, health.
In the paper provided by the present invention, described paper pulp contains and does not float straw pulp.It has been generally acknowledged that straw pulp is through after bleaching, its performance has improved, and is difficult to reach without its performance of bleaching and copies the paper requirement, adds the shortcoming of straw pulp self, has limited the application of straw pulp greatly, has limited the application of not floating straw pulp especially.Although the inventor finds that straw pulp is without bleaching the back owing to it makes its whiteness reduction without crossing bleaching, but other performance is not because the corresponding reduction without bleaching, opposite some performance has also strengthened, and as bulk, opacity and air permeability etc., thereby its combination property is improved.
Among the present invention, vertical deflection of described electro-photographic paper is 0.3-0.5mNm, and lateral stiffness is 0.15-0.25mNm.
Deflection is to weigh the index of paper and the anti-flexibility of cardboard.Deflection and paper have direct relation at printer and the operating performance of duplicator.Paper sheet stiffness is big more, and just easy of more these photographic printing apparatus, the problem of paperboard will reduce; Deflection is big more, and the anti-flexibility of its moulding article and cardboard is just big more.And deflection is decided by bulk to a great extent.Among the present invention, described paper contains mixed pulp of the present invention and since contain in the described mixed pulp bulk high do not float straw pulp, thereby the bulk of its paper is obviously improved, and then improved the deflection of paper or paper moulding product.
Among the present invention, the opacity of described typing paper is 80-90%; The opacity of described offset printing paper is 80-90%; The opacity of described writing paper is 80-90%; The opacity of described electro-photographic paper is 85%-95%, preferred 88%-95%, more preferably 90%-95%.
Opacity is one of optical property of paper, it also is an important quality index of printing paper, writing paper, loan and some industrial and technical papers, requirement has higher opacity, for cultural printing, as newsprint, opacity is hanged down and will be caused occurring shadow-mark, print through phenomenon, and influence is used.Among the present invention, owing to do not float the opacity height of straw pulp itself, make the opacity that contains the mixed pulp of not floating straw pulp improve, thereby the opacity of the cultural printing of preparation is obviously improved, and then prevent print through on the one hand; And on the other hand,, make the bulk that contains the mixed pulp of not floating straw pulp improve owing to do not float the bulk height of straw pulp, and bulk has determined opacity to a great extent, thereby the also corresponding raising of the opacity of its paper.
Among the present invention, described toilet paper pliability to average 150～500mN, is preferably 200～450mN, more preferably 250～400mN in length and breadth; Described tissue pliability is preferably 150～400mN, more preferably 200～300mN in length and breadth to average out to 100～450mN; Described tissue is 100～450mN to average pliability in length and breadth, is preferably 150～400mN, more preferably 200～350mN.
Though people think that straw pulp content is big in the paper products, can increase the fragility of paper, thereby pliability reduces.Find that this straw pulp that do not float is to the variation of the paper products pliability imagination so big not but the inventor is unexpected in experiment.Its toilet paper pliability that is used for manufacturing paper with pulp still meets the requirements, and in addition, after adding flexibilizing agent, the finished paper pliability also can further improve.
If taked foregoing high-hardness pulp preparation method, the starch degree height that obtains, the toilet paper quality that obtains is better, but pliability can be a bit weaker, can add above-mentioned flexibilizing agent equally and improve pliability.
Described flexibilizing agent can be types such as emulsifying wax, response type softener, metal complex, polysiloxanes, water soluble polyurethane resin, lanolin and surfactant.Wherein emulsifying wax is that multiple paraffin and animal and plant fat are formulated, can add the polyethylene of low relative molecular mass in addition.
More specifically say and to be ethene urea derivative, N-methylol fatty acid acid amides, alkyl melamine methylol, ketene dimers, polyoxyethylene stearic acid ester, emulsification organosilicon, sulfamic acid oxidic polyethylene, polyoxyethylene etc.
Above-mentioned softener consumption can be preferably 0.05～2% for 0.02～5% of slurry consumption.
Manufacturing paper with pulp of above-mentioned toilet paper can simultaneously, in order further to improve the toilet paper quality, also can further be added other papermaking auxiliary material with reference to the pulping method of any toilet paper of prior art.Described papermaking auxiliary material also can add one or more of following auxiliary material except above-mentioned softener:
Wet strength agent is as the polyamide polymeric amine epichlorohydrin.
Dry strength agent is as cationic starch, polyvinyl alcohol, carboxymethyl cellulose, cationic polyacrylamide or pectin.
Dispersant is as polyoxyethylene, acrylic-amino polymer etc.
In order to overcome the middle sticking cylinder phenomenon that produces of manufacturing paper with pulp, also can add remover or adhesive, as cationic polyamide, macromolecule wax etc.
Above-mentioned supplementary product consumption all can be with reference to prior art, and the present invention need not to give unnecessary details.
This have low whiteness do not float straw pulp except the toilet paper of can manufacturing paper with pulp, can manufacture paper with pulp also that other requires the paper of water absorbing properties equally, as tissue.
Described tissue has good water absorbing properties, and laterally suction range is 10～40mm/100s, is preferably 15～29mm/100s, more preferably 20～25mm/100s.
The pulping method of above-mentioned tissue equally can be with reference to any tissue pulping method of prior art, and in order further to improve the quality of products, can add any papermaking auxiliary material noted earlier.
Compared with prior art, mixed pulp provided by the present invention has following advantage with the paper product that contains this mixed pulp:
(1) though mixed pulp whiteness provided by the present invention is lower, need not add any dyestuff and just can make the people form the yellow of best vision environment, play the effect of vision protection;
(2) mixed pulp provided by the present invention not only solves because it does not float the environmental issue that straw pulp is brought without the bleaching back, and its combination property is superior;
(3) paper that contains mixed pulp provided by the present invention not only has higher bulk, air permeability and opacity, and has higher deflection and anti-flexibility, easily smoothly by duplicator or printer, avoids paper jam phenomenon to occur;
(4) it is higher to contain the cultural printing opacity of mixed pulp provided by the present invention, can prevent print through;
(5) straw pulp of being joined in the mixed pulp provided by the present invention is not for floating straw pulp, not through bleaching, hydroxyl in cellulose and the hemicellulose and aldehyde radical change into active carboxyl or the possibility of carbonyl diminishes, thereby have reduced the generation of yellowing reversion of pulp phenomenon, the i.e. generation of aging phenomenon.
The specific embodiment
Below be the specific embodiment of the present invention, described embodiment is in order to further describe the present invention, rather than restriction the present invention.
One, do not float the preparation of straw pulp
1, embodiment 1-7 does not float straw pulp for adopting the soda processes preparation, and the performance of wherein not floating straw pulp is that the slurry that obtains after boiling, washing adopts conventional method to record.
Table 1, soda pulping parameter
The cm of bulk unit in the form
3/ g, air permeability unit/ml/min, fracture length unit K m, the N.m/g of folding strength unit, the mN of tearability unit, the mN.m of tear index unit
2/ g.Following table is identical.
2, embodiment 8-14 does not float straw pulp for adopting the caustic soda-aq method preparation, and the performance of wherein not floating straw pulp is that the slurry that obtains after boiling, washing adopts conventional method to record.
Table 2, caustic soda-aq method slurrying parameter
3, embodiment 15-22 does not float straw pulp for adopting the sulfate process preparation, and the performance of wherein not floating straw pulp is that the slurry that obtains after boiling, washing adopts conventional method to record.
Table 3, sulfate pulping parameter
4, embodiment 23-28 does not float straw pulp for adopting alkaline sodium sulfite-AQ method preparation, and the performance of wherein not floating straw pulp is that the slurry that obtains after boiling, washing adopts conventional method to record.
Table 4, alkaline sodium sulfite-AQ legal system slurry parameter
5, embodiment 29～34 does not float straw pulp for adopting the Ammonium Sulfite Method preparation, and the performance of wherein not floating straw pulp is that the slurry that obtains after boiling, washing adopts conventional method to record.
Table 5, pulping with ammonium sulfite method parameter
Can find out that by the front form employing can with high-performance slurry or not float the boiling of straw pulp hardness be 16～28 to permanganate number, the straw pulp that the Ammonium Sulfite Method in preferred 16～25 scopes prepares, performance than additive method obtain higher.
6, adopt the preparation of different pulping process and oxygen delignification not float straw pulp
The resulting slurry of the foregoing description is carried out not floated straw pulp behind the oxygen delignification again.
The method of oxygen delignification of the present invention adopts conventional method or ZL200710143130.0 disclosed method to carry out.
Table 6, the different prepared slurries of slurrying embodiment carry out the performance of not floating straw pulp that obtains behind the oxygen delignification
Annotate: 1#, 5#, 12#, 18#, 23# and 28# are meant the foregoing description 1,5,12,18,23 and 28 resulting slurries respectively.
It is similar to table 6 that the prepared slurry of other slurrying embodiment adopts conventional method or ZL200710143130.0 disclosed method to carry out the performance of not floating straw pulp that obtains behind the oxygen delignification.
Equally also can adopt Ammonium Sulfite Method to carry out slurrying, for example can be with reference to patent application 200710129635.1.
Two, the preparation of paper products
1, electro-photographic paper
The preparation method of electro-photographic paper is referring to " production technology of electro-photographic paper " (" production technology of electro-photographic paper " of Yan Jianhua, Wang Cuilian, Zhang Jiyan, " paper and papermaking ", the 3rd phase of July in 1993: 23-24), different just raw materials be the proportioning difference of mixed pulp.The performance parameter of the electro-photographic paper that different mixed pulp preparations is prepared is as shown in table 7:
Table 7, different mixed pulp are prepared the performance parameter of prepared electro-photographic paper
Annotate: 16# number slurry for embodiment 16 prepared do not float straw pulp, 6# number slurry for embodiment 6 prepared do not float straw pulp, by that analogy.
As can be seen from Table 7, adopt and not float the electro-photographic paper that other paper pulp of straw pulp adapted manufactures paper with pulp and meet national standard, some performance even be better than national standard is as obviously increasing to deflection in length and breadth.
2, the preparation of typing paper
The preparation method of typing paper referring to " production of brief talking typing paper with put into practice " (" production of brief talking typing paper with put into practice " is encouraged by Liu Liyuan, kind unit, " Hunan papermaking ", the 2nd phase of calendar year 2001: 10-11), different just raw materials be the proportioning difference of mixed pulp.The performance parameter of the typing paper that different mixed pulp preparations is prepared is as shown in table 8:
Table 8, different mixed pulp are prepared the performance parameter of prepared typing paper
Annotate: the 23# slurry for embodiment 23 prepared do not float straw pulp, the 24# slurry for embodiment 24 prepared do not float straw pulp.
As can be seen from Table 8, adopt and not float typing paper that other paper pulp of straw pulp adapted manufactures paper with pulp except whiteness, other index meets national standard.
3, the preparation of offset printing paper
Table 9, different mixed pulp are prepared the performance parameter of prepared hectographic printing with paper
Annotate: the 25# slurry for embodiment 25 prepared do not float straw pulp, the 24# slurry for embodiment 24 prepared do not float straw pulp.
As can be seen from Table 9, adopt and not float offset printing paper whiteness that other paper pulp of straw pulp adapted manufactures paper with pulp and human visual is stimulated little, opacity, smoothness improve, and other index meets national standard.
4, the preparation of writing paper
The preparation method of writing paper copies the paper method referring to patent ZL87101416.5, different just raw materials be the proportioning difference of mixed pulp.The performance parameter of the writing paper that different mixed pulp preparations is prepared is as shown in table 10:
Table 10, different mixed pulp are prepared the performance parameter of prepared writing paper
Annotate: the 26# slurry for embodiment 26 prepared do not float straw pulp, the 28# slurry for embodiment 28 prepared do not float straw pulp, by that analogy.
As can be seen from Table 10, adopt and not float writing paper whiteness that other paper pulp of straw pulp adapted manufactures paper with pulp and human visual is stimulated little, opacity, smoothness improve, and other index meets national standard.
5, newsprint
The preparation method of newsprint is referring to patent application CN93108185 manufacture method, different just raw materials be the proportioning difference of mixed pulp.The performance parameter of the newsprint paper that different mixed pulp preparations is prepared is as shown in table 11:
Table 11, different mixed pulp are prepared the performance parameter of prepared newsprint
Annotate: the 26# slurry for embodiment 26 prepared do not float straw pulp, the 28# slurry for embodiment 28 prepared do not float straw pulp, by that analogy.
As can be seen from Table 11, adopt and not float the newsprint that other paper pulp of straw pulp adapted is manufactured paper with pulp, because the performance of not floating straw pulp, it is very high to make it copy its opacity of newsprint, the smoothness made, and other index meets national standard.
6, toilet paper is manufactured paper with pulp:
But concrete pulping method referenced patent application 88108012: straw pulp and wood pulp are mixed the back making beating, and 40 ° of SR of beating degree add aluminum sulfate 3%, trimethyl melamine 0.1%, speed of a motor vehicle 1000m/min, the embodiment 15 described toilet papers of manufacturing paper with pulp out.
Perhaps articles of reference " papermaking process of soft toilet paper " " paper and papermaking " 5 phases in 1997, p17: the straw pulp of equivalent wood pulp and embodiment 3 is mixed the back making beating, 35 ° of SR of beating degree, add polyamide polymeric amine epichlorohydrin 1%, Tissuemat E 0.12%, the embodiment 33 described toilet papers of manufacturing paper with pulp out.
Other embodiment also can just change concrete parameter with reference to above-mentioned prepared, for example beating degree, add the different auxiliary material or the difference of supplementary product consumption, can obtain the toilet paper of following different parameters.
Table 12, the toilet paper parameter of manufacturing paper with pulp
| Embodiment | ??31 | ??32 | ??33 | ??34 | ??35 | ??36 | ??37 |
| Straw pulp | ??1 | ??2 | ??3 | ??4 | ??5 | ??6 | ??7 |
| Other slurries | Wood pulp 75% | Wood pulp 29% | Bamboo pulp 5% | Cotton pulp 60% | Bamboo pulp 20% wood pulp 20% | Wood pulp 30% cotton pulp 30% | Cotton pulp 3% |
| Quantitatively | ??12 | ??20 | ??18 | ??17 | ??19 | ??13 | ??25 |
| Whiteness | ??58 | ??35 | ??50 | ??37 | ??45 | ??53 | ??43 |
| Pliability | ??350 | ??500 | ??170 | ??250 | ??450 | ??430 | ??120 |
| Tensile index | ??2.5 | ??2.8 | ??1.6 | ??2.3 | ??3.2 | ??2.7 | ??4.0 |
| Suction range | ??10 | ??27 | ??22 | ??18 | ??23 | ??17 | ??38 |
As seen from the above table, the toilet paper that uses the present invention program to manufacture paper with pulp out has higher suction range, and tensile index, and pliability preferably also meets national standard.
7, tissue manufactures paper with pulp
The pulping method of tissue can be referring to patent application 01109815.5: mix after 10% wood pulp and 90% embodiment, 14 described straw pulps are pulled an oar respectively, 32 ° of SR of straw pulp beating degree, wood pulp is 45 ° of SR, add daiamid epoxy chloropropane 0.7% then, alkyl ketene dimer 0.17%, polyethylene glycol oxide 0.06%, speed of a motor vehicle 900m/min, the embodiment 54 described tissues of manufacturing paper with pulp out.
Other embodiment also can just change concrete parameter with reference to above-mentioned prepared, for example beating degree, add the different auxiliary material or the difference of supplementary product consumption, can obtain the toilet paper of following different parameters.
Table 18, the tissue parameter of manufacturing paper with pulp
| Embodiment | ??48 | ??49 | ??50 | ??51 | ??52 | ??53 | ??54 |
| Straw pulp | ??8 | ??9 | ??10 | ??11 | ??12 | ??13 | ??14 |
| Other slurries | Wood pulp 75% | Bleached wood pulp 5% | Bamboo pulp 30% cotton pulp 40% | Wood pulp 40% | Bamboo pulp 20% | Cotton pulp 80% | Wood pulp 60% |
| Quantitatively | ??16 | ??12 | ??19 | ??23 | ??26 | ??24 | ??13 |
| Embodiment | ??48 | ??49 | ??50 | ??51 | ??52 | ??53 | ??54 |
| Whiteness | ??53 | ??54 | ??48 | ??35 | ??60 | ??58 | ??37 |
| Pliability | ??650 | ??100 | ??390 | ??320 | ??580 | ??460 | ??530 |
| Tensile strength | ??45 | ??200 | ??250 | ??50 | ??150 | ??60 | ??100 |
| Suction range | ??20 | ??11 | ??25 | ??30 | ??40 | ??34 | ??15 |
As seen from the above table, the tissue that uses the present invention program to manufacture paper with pulp out has higher suction range, and tensile index, and pliability preferably also meets national standard.
Table 19, the tissue parameter of manufacturing paper with pulp
| Embodiment | ??55 | ??56 | ??57 | ??58 | ??59 | ??60 | ??61 |
| Straw pulp | ??20 | ??23 | ??25 | ??27 | ??29 | ??31 | ??33 |
| Other slurries | Bleached wood pulp 80% | Bleached wood pulp 5% | Bamboo pulp 30% cotton pulp 40% | Wood pulp 40% | Bamboo pulp 20% | Cotton pulp 70% | Wood pulp 10% |
| Quantitatively | ??15 | ??15 | ??20 | ??20 | ??25 | ??25 | ??17 |
| Whiteness | ??79 | ??35 | ??70 | ??45 | ??60 | ??62 | ??40 |
| Pliability | ??350 | ??200 | ??400 | ??300 | ??250 | ??450 | ??130 |
| Tensile index | ??2.5 | ??1.2 | ??1.9 | ??1.7 | ??1.5 | ??2.2 | ??1 |
| Suction range | ??37 | ??25 | ??31 | ??35 | ??20 | ??45 | ??23 |
As seen from the above table, the tissue that uses the present invention program to manufacture paper with pulp out has higher suction range, and tensile index, and pliability preferably also meets national standard.
Below be adapted do not float the prepared paper product of straw pulp and adapted bleaching straw pulp performance relatively.
Comparative example 1
Table 20 pair whole wood pulp (batching A), be equipped with 50% bleached wheat straw pulp (batching B) and be equipped with 50% quality of not floating the copy paper that Straw Pulp (batching C) produces and contrast.Batching A and batching B and batching C manufacture paper with pulp under same paper machine, condition of similarity, by more as can be known, be equipped with the closely similar of paper main performance that 50% bleached wheat straw pulp manufactures paper with pulp and whole wood pulp, do not float paper main performance that Straw Pulp manufactures paper with pulp than the making moderate progress of whole wood pulp and be equipped with 50%, and performance is better than being equipped with the paper that 50% bleached wheat straw pulp is manufactured paper with pulp.
Table 20. whole wood pulp copy paper be equipped with 50% bleached wheat straw pulp and be equipped with the 50% copy paper performance of not floating Straw Pulp relatively
Comparative example 2
Table 21 pair whole wood pulp (batching A), be equipped with 50% bleached wheat straw pulp (batching B) and be equipped with 50% quality of not floating the toilet paper that Straw Pulp (batching C) produces and contrast.Batching A and batching B and batching C manufacture paper with pulp under same paper machine, condition of similarity, by more as can be known, be equipped with the closely similar of paper main performance that 50% bleached wheat straw pulp manufactures paper with pulp and whole wood pulp, do not float paper main performance that Straw Pulp manufactures paper with pulp than the making moderate progress of whole wood pulp and be equipped with 50%, and performance is better than being equipped with the paper that 50% bleached wheat straw pulp is manufactured paper with pulp.Three's pulping method and other auxiliary material are all identical.
Table 21, whole wood pulp toilet paper and join 50% bleached wheat straw pulp and join the 50% toilet paper performance of not floating Straw Pulp relatively
Comparative example 3
This comparative example is the comparison of the performance of not floating straw pulp and bleaching straw pulp of Shandong Qualin Paper Industry Co., Ltd., wherein, do not float (pressure) and bleaching (pressure) and be meant what employing this area conventional method detected, not floating (pressing) and bleaching (pressing) is that the following method of employing detects:
(1) page is manufactured paper with pulp
Closing water discharging valve, clip storage slurry device, open inlet valve with the flushing net, allow waterborne being raised to be higher than wire side 50mm place at least, quantitatively is 60 ± 3.0g/m by what copy into page
2Amount pour slurry (calculating) into by oven-dry weight.
Water is added on the mark horizontal line, insert agitator, and mobile lightly up and down stirred suspension, agitating plate should remain under the suspension liquid level when stirring, move up and down for six times back and forth and can guarantee that slurry and water mix fully completely, before taking out agitator, stirring gently once more then, wait 10s quietly, promptly all open the emptying valve subsequently.
After water filtered from copper mesh, to online in type page, the suction time that reduces pressure was about about 10% of drainage time, but is no less than 5s, has obtained page.
(2) detect the performance of starching
Step (1) page of making of copying is surveyed various performances according to following method respectively:
Quantitatively measure, can calculate bulk according to tightness according to GB 451 " paper and Board size, degree of skewness, quantitatively, the determination method of thickness and tightness ".
Tensile index is measured by GB 453 " determination method of paper and Board tensile strength and percentage elongation ".
Tear index is measured according to GB455 " assay method of paper and Board tearability ", obtains quantitatively can calculating tear index divided by the sample through warm and humid processing after the tearability.
Folding strength is measured by GB 457 " determination method of paper folding strength ".
Air permeability is measured by GB 5402 " determination method of paper and cardboard air permeability (Ge Erlaifa) ".
Whiteness is measured by GB/T 7974-2002 " the mensuration diffuse reflection/normal beam technique of paper, cardboard and brightness of pulp (whiteness) ".
Table 22, Shandong Qualin Paper Industry Co., Ltd.'s laboratory report (mean value)
Detect content: copy sheet and detect the date: on November 5th, 2008
Check unit: quality control department
As can be seen from Table 13, the bulk of brown stock, opacity and air permeability all are better than bleached pulp.
Comparative example 4
This test example be Shandong Qualin Paper Industry Co., Ltd. do not float straw pulp and bleaching straw pulp degradation comparing result.
Paper pulp meeting flavescence gradually after placing a period of time under common environment or the specified conditions, whiteness decrease to some degree, i.e. the brightness reversion phenomenon of paper pulp.This brightness reversion phenomenon is owing under illumination and oxygen existence condition, the various free radicals of the oxidized generation of paper pulp.Phenolic hydroxyl group in lignin homolysis under the effect of ultraviolet light or free radical produces the phenol oxygen-cent red radical, and the phenol oxygen-cent red radical is oxidized to coloured o-quinone structure by peroxy radical.Bibliographical information is arranged (referring to " the inhibition of pulp brightness reversion progress of research " of Dong Cuihua etc., " paper and papermaking ", June the 27th in 2008 rolled up: 33-37) bleaching is also influential to the brightness reversion of paper pulp, this be since cellulose and hemicellulose in the bleaching oxidizing process, hydroxyl and aldehyde radical change into active big carboxyl or carbonyl and easily cause yellowing reversion of pulp; Metal ion, particularly heavy metal ion can play catalytic action in bleaching, quicken the oxidation of bleaching process.
Table 17, Shandong Qualin Paper Industry Co., Ltd.'s laboratory report (mean value)
Detect content: Straw Pulp is copied sheet and is detected the date: on November 15th, 2008
| Test item | Quantitatively | Bulk | Fracture length | Tensile index | Folding strength | Tear index | Tearability | Whiteness | Color (L*a*b) |
| Unit | ??g/m 2 | ??cm 3/g | ??Km | ??Km | Inferior | ??mN.m 2/g | ??mN | ??％ | |
| 1# line (true qualities) | ??64.7 | ??2.104 | ??4.711 | ??46.2 | ??84 | ??2.93 | ??189.6 | ??38.5 | ??78.55/14.81/16.77 |
| 1# line (true qualities are aging) | ??63.3 | ??2.113 | ??4.751 | ??46.5 | ??6.5 | ??2.95 | ??187 | ??37.8 | ??78.32/11.56/19.13 |
| 3# line (true qualities) | ??63.0 | ??2.419 | ??4.872 | ??47.7 | ??32.5 | ??4.24 | ??267.1 | ??38.8 | ??78.57/11.00/18.47 |
| 3# line (true qualities are aging) | ??61.8 | ??2.248 | ??5.098 | ??49.9 | ??12 | ??3.87 | ??239 | ??39.2 | ??78.08/11.50/18.47 |
| 1# line (bleaching) | ??61.1 | ??2.012 | ??4.553 | ??44.6 | ??17 | ??3.71 | ??226.7 | ??66.1 | ??88.97/9.46/7.67 |
| 1# line (bleaching is aging) | ??60.8 | ??1.974 | ??4.381 | ??42.93 | ??5 | ??3.03 | ??184 | ??62.2 | ??88.12/10.15/10.56 |
| 3# line (bleaching) | ??61.4 | ??1.904 | ??5.004 | ??49 | ??42 | ??4.12 | ??252.7 | ??67.9 | ??89.80/9.58/7.76 |
| 3# line (bleaching is aging) | ??61.1 | ??1.783 | ??5.032 | ??49.3 | ??13.7 | ??3.01 | ??184 | ??61.4 | ??88.10/10.04/9.54 |
The result shows, compares with bleached pulp, and natural color pulp is difficult for brightness reversion, and ageing resistace is more superior.
Claims (14)
1. one kind low whiteness mixed pulp is characterized in that, contains low whiteness straw pulp in the described mixed pulp, and the whiteness of described low whiteness straw pulp is 30-60%, and is preferred 35～55%, more preferably 38～50%, most preferably 40～45%.
2. mixed pulp according to claim 1, it is characterized in that, the low whiteness straw pulp of consisting of of described mixed pulp: 25-100% and the industrial paper pulp of 0-75%, low whiteness straw pulp and the industrial paper pulp of 5-70%, the more preferably low whiteness straw pulp of 72-91% and the industrial paper pulp of 9-28% of preferred 30-95%; Described industrial paper pulp is one or more in wood pulp, cotton pulp, bamboo pulp or the secondary stock.
3. mixed pulp according to claim 1 and 2, it is characterized in that: the slurry of described low whiteness straw pulp for obtaining through boiling, washing step, the perhaps slurry that obtains through boiling, washing, oxygen delignification step, wherein said boiling is for being that raw material is permanganate number 16-28 through obtaining hardness after the boiling with the grass kind plant, and beating degree is the high-hardness pulp of 10-24 ° of SR.
4. cultural paper, comprise paper pulp and papermaking auxiliary material, it is characterized in that, described paper pulp comprises the industrial paper pulp that does not float straw pulp and 0-75% of 25-100%, the industrial paper pulp that does not float straw pulp and 5-70% of preferred 30-95%, the more preferably low whiteness straw pulp of 72-91% and the industrial paper pulp of 9-28%; Described industrial paper pulp is one or more in wood pulp, cotton pulp, bamboo pulp or the secondary stock; Described whiteness of not floating straw pulp is 30-60%, is preferably 35～55%, more preferably 38～50%, most preferably be 40～45%.
5. low cultural paper according to claim 4 is characterized in that: the described tensile index that does not float straw pulp is 45-60mN/g, preferred 48-60mN/g, more preferably 50-60mN/g.
6. according to claim 4 or 5 described cultural papers, it is characterized in that described cultural paper is electro-photographic paper, typing paper, offset printing paper, writing paper or newsprint.
7. cultural paper according to claim 6 is characterized in that, vertical deflection of described electro-photographic paper is 0.3-0.5mNm, and lateral stiffness is 0.15-0.25mNm; The opacity of described typing paper is 80-90%; The opacity of described offset printing paper is 80-90%; The opacity of described writing paper is 80-90%.
8. paper for daily use, comprise paper pulp and papermaking auxiliary material, it is characterized in that, described paper pulp comprises the industrial paper pulp that does not float straw pulp and 0-75% of 25-100%, the industrial paper pulp that does not float straw pulp and 5-70% of preferred 30-95%, the more preferably low whiteness straw pulp of 72-91% and the industrial paper pulp of 9-28%; Described industrial paper pulp is one or more in wood pulp, cotton pulp, bamboo pulp or the secondary stock; Described whiteness of not floating straw pulp is 30-60%, is preferably 35～55%, more preferably 38～50%, most preferably be 40～45%.
9. low cultural paper according to claim 8 is characterized in that: the described tensile index that does not float straw pulp is 45-60mN/g, preferred 48-60mN/g, more preferably 50-60mN/g.
10. according to Claim 8 or 9 described paper for daily uses, it is characterized in that: described paper for daily use is toilet paper, tissue or tissue.
11. paper for daily use according to claim 10 is characterized in that: the horizontal suction range of described toilet paper is 10～40mm/100s, is preferably 15～38mm/100s, more preferably 20～35mm/100s; The horizontal suction range of described tissue is 10～40mm/100s, is preferably 15～29mm/100s, more preferably 20～25mm/100s; The horizontal suction range of described tissue is 20～45mm/100s, is preferably 25～40mm/100s, more preferably 30～35mm/100s.
12. paper for daily use according to claim 11 is characterized in that: described toilet paper whiteness is 35～58%, is preferably 37～55%, more preferably 40～52%, most preferably be 42～50%; Described tissue whiteness is 35～60%, is preferably 37～58%, more preferably 40～55%, most preferably be 43～53%; Described tissue whiteness is 35～79%, is preferably 40～65%, more preferably 45～60%, most preferably be 50～55%.
13. paper for daily use according to claim 12 is characterized in that: described toilet paper pliability to average 150～500mN, is preferably 200～450mN, more preferably 250～400mN in length and breadth; Described tissue pliability is preferably 150～400mN, more preferably 200～300mN in length and breadth to average out to 100～450mN; Described tissue is 100～450mN to average pliability in length and breadth, is preferably 150～400mN, more preferably 200～350mN.
14. paper for daily use according to claim 13 is characterized in that: described toilet paper tensile index is 1.5～4N.m/g, is preferably 1.7～3.5N.m/g, more preferably 2.0～3.0N.m/g; Described tissue is 45～250N/m to average tensile strength in length and breadth, is preferably 50～200N/m, more preferably 60～150N/m; The horizontal tensile index of described tissue is 1～2.5N.m/g, is preferably 1.5～2.3N.m/g, more preferably 1.7～2N.m/g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810173093A CN101760981B (en) | 2008-11-28 | 2008-11-28 | Low-whiteness mixed pulp and paper containing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810173093A CN101760981B (en) | 2008-11-28 | 2008-11-28 | Low-whiteness mixed pulp and paper containing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101760981A true CN101760981A (en) | 2010-06-30 |
| CN101760981B CN101760981B (en) | 2012-10-03 |
Family
ID=42492351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810173093A Active CN101760981B (en) | 2008-11-28 | 2008-11-28 | Low-whiteness mixed pulp and paper containing the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101760981B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104911946A (en) * | 2015-06-29 | 2015-09-16 | 蒋勇 | Coated paper |
| CN105568745A (en) * | 2015-12-24 | 2016-05-11 | 浙江华川实业集团有限公司 | Duplicating paper and preparation method thereof |
| CN107059480A (en) * | 2017-03-24 | 2017-08-18 | 安徽格义循环经济产业园有限公司 | A kind of writing paper and preparation method thereof as made from non-timber class paper pulp |
| CN112391867A (en) * | 2020-10-27 | 2021-02-23 | 上海晨光文具股份有限公司 | Environment-friendly eye protection paper and preparation method thereof |
| CN116122073A (en) * | 2022-12-13 | 2023-05-16 | 金东纸业（江苏）股份有限公司 | The white double-adhesive paper and the preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1306125A (en) * | 2001-03-20 | 2001-08-01 | 张国兴 | Technology for making daily used paper |
| CN1590641A (en) * | 2003-09-04 | 2005-03-09 | 镇江金河纸业有限公司 | Production technology of bleaching salfate reed mixed pulp |
-
2008
- 2008-11-28 CN CN200810173093A patent/CN101760981B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104911946A (en) * | 2015-06-29 | 2015-09-16 | 蒋勇 | Coated paper |
| CN105568745A (en) * | 2015-12-24 | 2016-05-11 | 浙江华川实业集团有限公司 | Duplicating paper and preparation method thereof |
| CN107059480A (en) * | 2017-03-24 | 2017-08-18 | 安徽格义循环经济产业园有限公司 | A kind of writing paper and preparation method thereof as made from non-timber class paper pulp |
| CN107059480B (en) * | 2017-03-24 | 2019-04-02 | 中信格义循环经济有限公司 | One kind writing paper as made from non-timber class paper pulp and preparation method thereof |
| CN112391867A (en) * | 2020-10-27 | 2021-02-23 | 上海晨光文具股份有限公司 | Environment-friendly eye protection paper and preparation method thereof |
| CN116122073A (en) * | 2022-12-13 | 2023-05-16 | 金东纸业（江苏）股份有限公司 | The white double-adhesive paper and the preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101760981B (en) | 2012-10-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101255670B (en) | Exquisite kraft paper and producing method thereof | |
| CN101760981B (en) | Low-whiteness mixed pulp and paper containing the same | |
| CN101760987B (en) | High-air-permeability mixed pulp and household paper made thereof | |
| RU2010100787A (en) | METHOD FOR PRODUCING MODIFIED CELLULOSE FOR USE IN PAPER OR PAPER FABRIC, WHITE MODIFIED SULPHATE CELLULOSE, PAPER OR PAPERBOARD | |
| CN111270561B (en) | High-whiteness yellowing-resistant coated white cardboard and preparation method thereof | |
| CN102251429B (en) | Colored kraft paper and production method thereof | |
| CN108396592B (en) | Method for manufacturing micro-coated biblica paper | |
| CN110761109B (en) | Color card and manufacturing method thereof | |
| CN101434663A (en) | Method for separating hemicellulose in high yield pulp waste liquor and use of hemicellulose separated thereby | |
| US20120247696A1 (en) | Pulping process | |
| CN101760982B (en) | Mixed pulp with high bulk and paper having same | |
| CN101760984B (en) | High strength mixing pulp and cultural paper made of thereof | |
| CN109736128A (en) | A kind of manufacturing method of suction pipe body paper | |
| CN109403116A (en) | Anti-myopia paper and its preparation method and application | |
| CN101760983B (en) | Mixed pulp and paper with the same | |
| CN101760988B (en) | Mixed pulp material and cultural paper prepared from the same | |
| CN101760986B (en) | Mixed pulp with high bulk, air permeability and tear index and cultural paper made thereof | |
| CN101967765A (en) | High-beating-degree cotton pulp product used for banknote paper and production method thereof | |
| CN102154926A (en) | Method for improving whiteness of paper | |
| CN101760989A (en) | Mixed pulp with high opacity, air permeability and tearing index and cultural paper prepared from the same | |
| CN101660285A (en) | Unbleached straw pulp with improved color phase, folding endurance and loose depth, and stable performances | |
| CN106592321B (en) | The method that a kind of biochemical process ECF bleached kraft pulps of Fast growth poplar prepare paper base material | |
| CN101760985B (en) | High-opacity mixed pulp and cultural paper prepared from the same | |
| CN115434185B (en) | Cushion paper special for air fryer tray and preparation method thereof | |
| CN111501411B (en) | Production process of sulfur-free circuit board isolation paper |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANDONG HERUN PULP PAPER CO., LTD. Free format text: FORMER OWNER: SHANDONG FUYIN PAPER MAKING ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. Effective date: 20101224 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20101224 Address after: Shandong province Gaotang County Road 252800 Street No. 26 Applicant after: Shandong Tralin Paper Co., Ltd. Address before: Shandong province Gaotang County Road 252800 Street No. 26 Applicant before: Shandong Fuyin Paper Making Environmental Protection Technology Co., Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: SHANDONG FUYIN PAPER MAKING ENVIRONMENTAL PROTECTI Free format text: FORMER OWNER: SHANDONG HERUN PULP AND PAPER CO., LTD. Effective date: 20110118 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20110118 Address after: Shandong province Gaotang County Road 252800 Street No. 26 Applicant after: Shandong Fuyin Paper Making Environmental Protection Technology Co., Ltd. Address before: Shandong province Gaotang County Road 252800 Street No. 26 Applicant before: Shandong Tralin Paper Co., Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Low-whiteness mixed pulp and paper containing the same Effective date of registration: 20140211 Granted publication date: 20121003 Pledgee: China Development Bank Co Pledgor: Shandong Quanlin Paper Industry Co. Ltd.|Shandong Fuyin Paper Environmental Technology Co. Ltd. Registration number: 2014990000101 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model |