CN114086428A - Glass spacing paper and preparation method thereof - Google Patents
Glass spacing paper and preparation method thereof Download PDFInfo
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- CN114086428A CN114086428A CN202111279432.7A CN202111279432A CN114086428A CN 114086428 A CN114086428 A CN 114086428A CN 202111279432 A CN202111279432 A CN 202111279432A CN 114086428 A CN114086428 A CN 114086428A
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- paper
- pulp
- glass spacer
- starch
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- 239000011521 glass Substances 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000011121 hardwood Substances 0.000 claims abstract description 30
- 239000011122 softwood Substances 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 29
- 238000004537 pulping Methods 0.000 claims abstract description 27
- 239000002121 nanofiber Substances 0.000 claims abstract description 26
- 229920002472 Starch Polymers 0.000 claims abstract description 21
- 125000006850 spacer group Chemical group 0.000 claims abstract description 21
- 238000004061 bleaching Methods 0.000 claims abstract description 20
- 239000000835 fiber Substances 0.000 claims abstract description 19
- 235000019698 starch Nutrition 0.000 claims abstract description 17
- 239000008107 starch Substances 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 230000029087 digestion Effects 0.000 claims abstract description 3
- 238000010411 cooking Methods 0.000 claims description 18
- 238000005520 cutting process Methods 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 16
- 238000010009 beating Methods 0.000 claims description 14
- 238000004806 packaging method and process Methods 0.000 claims description 11
- 229920001592 potato starch Polymers 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid group Chemical group S(O)(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 239000002028 Biomass Substances 0.000 claims description 5
- 229920002261 Corn starch Polymers 0.000 claims description 4
- 244000017020 Ipomoea batatas Species 0.000 claims description 4
- 235000002678 Ipomoea batatas Nutrition 0.000 claims description 4
- 240000003183 Manihot esculenta Species 0.000 claims description 4
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 claims description 4
- 239000008120 corn starch Substances 0.000 claims description 4
- 239000011268 mixed slurry Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 229940100445 wheat starch Drugs 0.000 claims description 4
- 238000011002 quantification Methods 0.000 claims description 2
- 238000010025 steaming Methods 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims 1
- 230000003139 buffering effect Effects 0.000 abstract description 7
- 229920001131 Pulp (paper) Polymers 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 230000002349 favourable effect Effects 0.000 abstract description 5
- 239000000123 paper Substances 0.000 description 78
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 238000005192 partition Methods 0.000 description 12
- 239000011087 paperboard Substances 0.000 description 10
- 239000000428 dust Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- DTGKSKDOIYIVQL-WEDXCCLWSA-N (+)-borneol Chemical compound C1C[C@@]2(C)[C@@H](O)C[C@@H]1C2(C)C DTGKSKDOIYIVQL-WEDXCCLWSA-N 0.000 description 2
- REPVLJRCJUVQFA-UHFFFAOYSA-N (-)-isopinocampheol Natural products C1C(O)C(C)C2C(C)(C)C1C2 REPVLJRCJUVQFA-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229940116229 borneol Drugs 0.000 description 2
- CKDOCTFBFTVPSN-UHFFFAOYSA-N borneol Natural products C1CC2(C)C(C)CC1C2(C)C CKDOCTFBFTVPSN-UHFFFAOYSA-N 0.000 description 2
- 238000003490 calendering Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- DTGKSKDOIYIVQL-UHFFFAOYSA-N dl-isoborneol Natural products C1CC2(C)C(O)CC1C2(C)C DTGKSKDOIYIVQL-UHFFFAOYSA-N 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP 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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/10—Packing paper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D57/00—Internal frames or supports for flexible articles, e.g. stiffeners; Separators for articles packaged in stacks or groups, e.g. for preventing adhesion of sticky articles
- B65D57/002—Separators for articles packaged in stacks or groups, e.g. stacked or nested
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/30—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure
- B65D85/48—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for glass sheets
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C3/00—Pulping cellulose-containing materials
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-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
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1026—Other features in bleaching processes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/02—Methods of beating; Beaters of the Hollander type
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
- D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP 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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/23—Lignins
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/28—Starch
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
The invention discloses glass spacer paper and a preparation method thereof, wherein the glass spacer paper comprises 50-70% of native hardwood pulp, 25-40% of native softwood pulp, 10-15% of starch, 3-10% of nanofiber reinforcing agent and 1-5% of pH regulator by mass, the native hardwood pulp and the native softwood pulp are respectively subjected to fiber digestion separation and bleaching operation after being mixed according to the proportion, and then pulping treatment is carried out at the pulping degree of 30-40 DEG SR. According to the invention, through pulping treatment of 100% pure wood pulp fiber and a high-speed overpressure process, no pollution and no scratch on the glass surface are realized, the taking and the placing are simple, the working efficiency is improved, and the problems that the production flow of the glass spacing paper in the current market is not favorable for environmental protection, and the spacing paper is easy to damage under low gram weight and the pressure buffering is influenced are effectively solved.
Description
Technical Field
The invention relates to the technical field of glass spacing paper, in particular to glass spacing paper and a preparation method thereof.
Background
The spacer paper product is mainly used for packaging TFT glass substrates and coated glass substrates at intervals, is also called glass spacer paper, glass spacer paper and glass spacer paper, plays a good role in protecting the intervals of the glass substrates, can effectively improve the finished product rate of glass and reduce the enterprise cost. However, most of glass partition paper in the market at present is chemical pulping, carcinogens such as chlorine, benzene and fluorescent powder are added in the process of bleaching paper pulp, so that the pollution problem exists in the manufacturing process, in addition, strict market needs not only to require products with low gram weight, but also to consider the strength of paper, so as to avoid hair falling, powder falling and paper breaking, on the other hand, the bulk of the paper is also guaranteed, the pressure buffering and protecting performance of the paper is improved, and at present, no glass partition paper with low cost, less pollution and excellent product quality and a production process exist.
Disclosure of Invention
The embodiment of the invention provides glass spacing paper and a preparation method thereof, which effectively solve the problems that the production process of the glass spacing paper in the current market is not favorable for environmental protection, and the spacing paper is easy to damage under low gram weight and influences pressure buffering.
According to one aspect of the invention, the glass spacer paper comprises 50-70% of native hardwood pulp, 25-40% of native softwood pulp, 10-15% of starch, 3-10% of nanofiber reinforcing agent and 1-5% of pH regulator in parts by mass, the native hardwood pulp and the native softwood pulp are subjected to fiber digestion separation and bleaching operations respectively after being mixed according to the proportion, and then pulping treatment is carried out at a pulping degree of 30-40 DEG SR.
Further, the starch is one or a mixture of potato starch, sweet potato starch, cassava starch, corn starch and wheat starch.
Further, the nanofiber reinforcing agent is biomass nanofiber prepared from softwood nanofiber and hardwood nanofiber, and the diameter of the biomass nanofiber is 5-100 nm.
Further, the pH regulator is a sulfuric acid solution with the concentration of 20-30%.
According to another aspect of the present invention, there is provided a method of preparing a glass spacing paper, the method comprising: and (3) cooking and bleaching: the primary hardwood pulp and the primary softwood pulp are respectively subjected to fiber separation operation by cooking according to the proportion requirement, and are added with the PH regulator for bleaching after being cleaned, so that bleached hardwood pulp and bleached softwood pulp are respectively prepared; pulping treatment: putting the bleached hardwood pulp and the bleached softwood pulp into a beating machine for beating treatment, wherein the beating degree is 30-40 DEG SR, so as to prepare mixed pulp; and (3) surfing the internet and making: adding the nanofiber reinforcing agent and the starch into the mixed slurry, uniformly mixing, and putting into a fourdrinier machine for net feeding and papermaking to obtain wet net paper; squeezing and drying: squeezing and dewatering the wet mesh paper, and then drying and supercalendering to obtain sample paper; cutting and packaging: and putting the sample paper into a cutting machine to cut a flat plate, then purifying, dedusting and destaticizing, sorting and packaging, and warehousing to obtain finished product paper.
Further, the cooking bleaching step comprises: the temperature for steaming and separating the fiber is set to be 80-90 ℃.
Further, in the step of cooking and bleaching, the method further comprises the following steps: the bleaching pH was set to 4-6.
Further, the step of manufacturing the paper by surfing the internet comprises the following steps: the paper making speed of the fourdrinier paper machine is set to be 220-250 m/min.
Further, the moisture content of the sample paper is 3.5-4.8%.
Further, the physicochemical indexes of the finished paper include but are not limited to: the quantification was 50. + -. 5% g/m2(ii) a The bulk is 1.3 +/-0.1 cm3(ii)/g; the whiteness is more than or equal to 80 percent; the longitudinal tensile strength is more than or equal to 3.0 KN/m; the transverse tensile strength is more than or equal to 1.0 KN/m.
The invention has the advantages that through the pulping treatment of 100 percent pure wood pulp fiber and the high-speed overpressure process, the glass surface is free from pollution and scratches, the picking and placing are simple, the working efficiency is improved, and the problems that the production flow of the glass spacing paper in the current market is not favorable for environmental protection, the spacing paper is easy to damage under low gram weight and the pressure buffering is influenced are effectively solved.
Drawings
The technical solution and other advantages of the present invention will become apparent from the following detailed description of specific embodiments of the present invention, which is to be read in connection with the accompanying drawings.
Fig. 1 is a flowchart illustrating steps of a method for manufacturing a glass spacer paper according to an embodiment of the present invention.
Fig. 2 is a flowchart illustrating steps of a method for manufacturing a glass spacer paper according to a second embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a flowchart illustrating steps of a method for manufacturing a glass spacer paper according to an embodiment of the present invention. The method comprises the following steps:
step S110: and (3) cooking and bleaching: and (2) cooking the native hardwood pulp and the native softwood pulp according to the proportion requirement to separate fibers, setting the temperature to be 85 ℃, washing, adding the pH regulator for bleaching, and setting the pH value to be 4.5 to respectively prepare bleached hardwood pulp and bleached softwood pulp.
Illustratively, wood pulp with high fiber coarseness and low resin content and ash content is selected, 60% of native hardwood pulp and 25% of native softwood pulp are respectively weighed and put into a continuous digester, the raw hardwood pulp and 25% of native softwood pulp are cooked for 30 minutes at the temperature of 85 ℃ to separate fibers, the fibers are respectively cleaned after the cooking is finished, then a sulfuric acid solution with the concentration of 30% is added as a pH regulator, the addition amount is 2% of the total mass of the raw materials, the pH value of the pulp is regulated to 4.5, and the cooking is continued for 20 minutes to respectively prepare bleached hardwood pulp and bleached softwood pulp.
Step S120: pulping treatment: and putting the bleached hardwood pulp and the bleached softwood pulp into a beating machine for beating treatment, wherein the beating degree is set to be 35 DEG SR, so as to prepare the mixed pulp.
Illustratively, the method comprises the steps of firstly checking whether impurities exist in a pulping cylinder of a pulping machine, then placing bleached hardwood pulp and bleached softwood pulp into the pulping cylinder, starting a stirrer, selecting a reasonable process rotating speed, placing borneol into an interlayer for refrigeration if the temperature of pulp is too high, defibering the pulping machine in a circulating reflux mode, properly cutting fibers to enable the beating degree of mixed pulp to be increased to 35 DEG SR, automatically discharging the pulp after pulping is finished, pressing a stop button, and stopping the operation of the pulping machine.
Step S130: and (3) surfing the internet and making: and adding the nanofiber reinforcing agent and the starch into the mixed slurry, uniformly mixing, and putting into a fourdrinier machine for net feeding papermaking at a papermaking speed of 235m/min to obtain wet net paper.
Exemplarily, 10% of starch and 3% of nanofiber reinforcing agent are respectively weighed, wherein the nanofiber reinforcing agent is biomass nanofiber prepared from softwood nanofiber and hardwood nanofiber and has the diameter of 5-100 nm; the starch is one or more of potato starch, sweet potato starch, tapioca starch, corn starch and wheat starch.
Illustratively, the papermaking is carried out by using a fourdrinier machine, dewatering and forming are carried out on the wire at the papermaking speed of 235m/min, clear water is used as a pulp carrier in the whole papermaking process, and meanwhile, a plurality of high-precision filtering devices are added at various sources in the whole papermaking environment, so that impurities in water sources and pulp are prevented from being mixed.
Step S140: squeezing and drying: and squeezing and dewatering the wet mesh paper, and then drying and supercalendering to obtain sample paper with the water content of 4.2%.
Illustratively, the wet-wire paper is sucked under vacuum condition to realize press dehydration, the wet-wire paper without certain water content enters a drying cylinder for drying for 2 hours, after the drying is finished, the wet-wire paper is flatly laid on a super soft roller calender, either on-line calendering or external overpressure can be adopted, the temperature adjustment of a back-and-forth hot roller is generally controlled by the pressure of a press nip, the surface temperature of the roller is about 70-90 ℃, the pressure of a bottom press nip is adjusted to 45MPa, the water content of the sample paper can be maintained at 4.2%, and the smoothness and the glossiness required by the paper can be obtained.
Step S150: cutting and packaging: and putting the sample paper into a cutting machine to cut a flat plate, then purifying, dedusting and destaticizing, sorting and packaging, and warehousing to obtain finished product paper.
Illustratively, a cutting process with different areas is carried out on sample paper in a vibrating cutting machine according to customer requirements, when the vibration excitation frequency is optimal, the cutting force can be guaranteed to be minimum to realize high-quality cutting of the paper, then the paper enters a dust removal chamber and a static eliminator respectively to realize purification, dust removal and static elimination, and then the paper is curled, packaged and put in storage to obtain finished paper.
According to the embodiment of the invention, the glass partition paper is prepared through a series of standardized flow operations of cooking bleaching, pulping treatment, net-surfing papermaking, pressing drying and cutting packaging, and the problems that the production flow of the glass partition paper in the current market is not favorable for environmental protection, and the partition paper is easy to damage under low gram weight and influences pressure buffering are effectively solved.
Fig. 2 is a flowchart illustrating steps of a method for manufacturing a glass spacer paper according to a second embodiment of the present invention. The method comprises the following steps:
step S210: and (3) cooking and bleaching: and (2) cooking the native hardwood pulp and the native softwood pulp according to the proportion requirement to separate fibers, setting the temperature to be 90 ℃, washing, adding the pH regulator for bleaching, and setting the pH value to be 5.2 to respectively prepare bleached hardwood pulp and bleached softwood pulp.
Illustratively, wood pulp with high fiber coarseness and low resin content and ash content is selected, native hardwood pulp with the mass fraction of 55% and native softwood pulp with the mass fraction of 28% are respectively weighed and put into a continuous digester, the raw hardwood pulp and the native softwood pulp are cooked for 25 minutes at the temperature of 90 ℃ to separate fibers, the fibers are respectively cleaned after the cooking is finished, then sulfuric acid solution with the concentration of 30% is added as a pH regulator, the addition amount is 1% of the total mass of the raw materials, the pH value of the pulp is regulated to 5.2, and the cooking is continued for 18 minutes to respectively prepare bleached hardwood pulp and bleached softwood pulp.
Step S220: pulping treatment: and putting the bleached hardwood pulp and the bleached softwood pulp into a beating machine for beating treatment, wherein the beating degree is set to be 40-degree SR, so as to prepare the mixed pulp.
Illustratively, the method comprises the steps of firstly checking whether impurities exist in a pulping cylinder of a pulping machine, then placing bleached hardwood pulp and bleached softwood pulp into the pulping cylinder, starting a stirrer, selecting a reasonable process rotating speed, placing borneol into an interlayer for refrigeration if the temperature of the pulp is too high, defibering the pulping machine in a circulating reflux mode, properly cutting fibers, increasing the beating degree of mixed pulp to 40 DEG SR, automatically discharging the pulp after pulping is finished, pressing a stop button, and stopping the operation of the pulping machine.
Step S230: and (3) surfing the internet and making: and adding the nanofiber reinforcing agent and the starch into the mixed slurry, uniformly mixing, and putting into a fourdrinier machine for net feeding papermaking at a papermaking speed of 240m/min to obtain wet net paper.
Exemplarily, 11% of starch and 5% of nanofiber reinforcing agent are respectively weighed, wherein the nanofiber reinforcing agent is biomass nanofiber prepared from softwood nanofiber and hardwood nanofiber and has the diameter of 5-100 nm; the starch is one or more of potato starch, sweet potato starch, tapioca starch, corn starch and wheat starch.
Illustratively, the papermaking is carried out by using a fourdrinier machine, dewatering and forming are carried out on the wire at the papermaking speed of 240m/min, clear water is used as a pulp carrier in the whole papermaking process, and meanwhile, a plurality of high-precision filtering devices are added at various sources in the whole papermaking environment, so that impurities in water sources and pulp are prevented from being mixed.
Step S240: squeezing and drying: and squeezing and dewatering the wet mesh paper, and then drying and supercalendering to obtain sample paper with the water content of 3.8%.
Illustratively, the wet wire paper is sucked under vacuum condition to realize press dehydration, the wet wire paper without certain water content enters a drying cylinder for drying for 1.5 hours, after the drying is finished, the wet wire paper is flatly laid on a super soft roller calender, either on-line calendering or external overpressure can be adopted, the temperature adjustment of a back and forth hot roller is generally controlled by the pressure of a press nip, the surface temperature of the roller is about 70-90 ℃, the pressure of the press nip at the bottom is adjusted to 50MPa, the water content of the sample paper can be maintained at 3.8%, and the smoothness and the glossiness required by the paper can be obtained.
Step S250: cutting and packaging: and putting the sample paper into a cutting machine to cut a flat plate, then purifying, dedusting and destaticizing, sorting and packaging, and warehousing to obtain finished product paper.
In this embodiment, the step S250 can refer to the related description of the step S150, and is not described herein again.
The glass partition paper is prepared by a series of standardized flow operations of cooking bleaching, pulping treatment, net-surfing papermaking, squeezing drying and cutting packaging, and the problems that the production flow of the glass partition paper in the current market is not favorable for environmental protection and the partition paper is easy to damage under low gram weight and affects pressure buffering are effectively solved.
The physical and chemical indexes of the glass partition paper prepared in the first and second examples respectively including quantitative, bulk, whiteness, smoothness, tensile strength, tear strength, water absorption, air permeability, dust degree and PH were tested by the present invention, and the specific test methods strictly adhered to GB/T451.2 quantitative determination of paper and paperboard, GB/T451.3 determination of paper and paperboard thickness, GB/T7974 determination of brightness of paper, paperboard and pulp (diffuse/vertical method), GB/T456 determination of smoothness of paper and paperboard (Bikk method), GB/T12914 tensile strength of paper and paperboard, GB/T455 determination of tear of paper and paperboard, GB/T1540 determination of water absorption of paper and paperboard (kobo method), GB/T458 determination of air permeability of paper and paperboard (Shoeber method), GB/T1541 "method for measuring the dust degree of paper and paper board" and GB/T1545.2 "method for measuring the pH value of paper, paper board and pulp water extract", the specific test results are shown in Table 1.
TABLE 1
The test results in table 1 show that the physical and chemical indexes of the finished glass partition paper prepared in the first and second embodiments all meet the technical standards, and further illustrate that the glass partition paper prepared by the preparation method has high smoothness and excellent performance, and the partition paper is not easy to damage under low gram weight and can effectively solve the problem of pressure buffering.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. The glass spacer paper is characterized by comprising 50-70% of native hardwood pulp, 25-40% of native softwood pulp, 10-15% of starch, 3-10% of nanofiber reinforcing agent and 1-5% of pH regulator in parts by mass, wherein the native hardwood pulp and the native softwood pulp are subjected to fiber digestion and separation and bleaching operations respectively after being mixed according to the proportion, and then are subjected to pulping treatment at a pulping degree of 30-40 DEG SR.
2. The glass spacer paper as claimed in claim 1, wherein the starch is one or more of potato starch, sweet potato starch, tapioca starch, corn starch, wheat starch.
3. The glass spacer paper according to claim 1, wherein the nanofiber reinforcement is a biomass nanofiber made of softwood nanofibers and hardwood nanofibers and having a diameter of 5-100 nm.
4. The glass spacer paper as claimed in claim 1, wherein the PH adjuster is a sulfuric acid solution having a concentration of 20-30%.
5. A method of making the glass spacer paper of any one of claims 1-4, comprising the steps of:
and (3) cooking and bleaching: the primary hardwood pulp and the primary softwood pulp are respectively subjected to fiber separation operation by cooking according to the proportion requirement, and are added with the PH regulator for bleaching after being cleaned, so that bleached hardwood pulp and bleached softwood pulp are respectively prepared;
pulping treatment: putting the bleached hardwood pulp and the bleached softwood pulp into a beating machine for beating treatment, wherein the beating degree is 30-40 DEG SR, so as to prepare mixed pulp;
and (3) surfing the internet and making: adding the nanofiber reinforcing agent and the starch into the mixed slurry, uniformly mixing, and putting into a fourdrinier machine for net feeding and papermaking to obtain wet net paper;
squeezing and drying: squeezing and dewatering the wet mesh paper, and then drying and supercalendering to obtain sample paper;
cutting and packaging: and putting the sample paper into a cutting machine to cut a flat plate, then purifying, dedusting and destaticizing, sorting and packaging, and warehousing to obtain finished product paper.
6. The method for preparing glass spacer paper according to claim 5, wherein the step of cooking and bleaching comprises:
the temperature for steaming and separating the fiber is set to be 80-90 ℃.
7. The method for preparing glass spacer paper according to claim 6, wherein the step of cooking and bleaching further comprises:
the bleaching pH was set to 4-6.
8. The method for producing glass spacer paper according to claim 5, wherein the step of making the upper web comprises:
the paper making speed of the fourdrinier paper machine is set to be 220-250 m/min.
9. The method for preparing glass spacer paper according to claim 5, wherein the sample paper has a moisture content of 3.5-4.8%.
10. The method for preparing glass spacer paper according to claim 5, wherein the physical and chemical indexes of the finished paper include but are not limited to: the quantification was 50. + -. 5% g/m2(ii) a The bulk is 1.3 +/-0.1 cm3(ii)/g; the whiteness is more than or equal to 80 percent; the longitudinal tensile strength is more than or equal to 3.0 KN/m; the transverse tensile strength is more than or equal to 1.0 KN/m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111279432.7A CN114086428A (en) | 2021-11-01 | 2021-11-01 | Glass spacing paper and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111279432.7A CN114086428A (en) | 2021-11-01 | 2021-11-01 | Glass spacing paper and preparation method thereof |
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| CN114086428A true CN114086428A (en) | 2022-02-25 |
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Application publication date: 20220225 |