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
  • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
  • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
  • D21H21/16—Sizing or water-repelling agents
• • 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
  • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
  • D21H11/14—Secondary fibres
• • 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
• • 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
• • 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
  • D21H17/33—Synthetic macromolecular compounds
  • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• • 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
  • D21H17/33—Synthetic macromolecular compounds
  • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
• • 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
• • 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
  • D21H27/18—Paper- or board-based structures for surface covering
  • D21H27/22—Structures being applied on the surface by special manufacturing processes, e.g. in presses
  • D21H27/26—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures

Definitions

• the present invention relates to a paper and a method for producing the same, and in particular to a waterproof recycled paper and a production method thereof, and belongs to the technical field of paper and its production and preparation.
• the waterproof property of the existing paper is generally obtained by adding a waterproofing property to the pulp, such as dipping the base paper, adding heavy oil to the pulp, or the like, or indicating that the coating has waterproof function after the paper is produced.
• Water repellent for example, Chinese patent CN1237227C discloses a waterproof and breathable paper which is composed of fiber pulp, heavy oil, fiber pulp including wood fiber pulp, hemp fiber pulp, mulberry fiber pulp, nut fiber pulp, natural bamboo fiber pulp, natural reed fiber pulp.
• the waterproof and breathable paper is prepared by forming the fiber slurry into a base paper, and after drying, the base paper is coated with a layer of heavy oil in a heavy oil pool. This type of paper has the characteristics of waterproof and breathable tensile strength.
• Some waterproof papers produced by the prior art have poor water repellency. For repeated use or when the paper surface friction is frequent, the waterproof layer on the surface is damaged or loses water resistance. Some waterproof papers are air permeability. Insufficient toughness or strength, which may cause damage and short service life during use. Some traditional waterproof papers, because of the chemical properties on the surface of the paper, also affect the surface writing, printing and other functions of the paper, some waterproof papers due to the pursuit of its efficient waterproof performance, adding too much chemicals to make the paper Environmental performance is affected.
• Recycled paper is a paper produced by using waste paper as a raw material, crushing it, and decolorizing and pulping through various processes.
• Recycled paper can be used to produce recycled paper notebooks, wrapping paper and packaging boxes, recycled paper business cards, recycled paper green pencils made from recycled paper as the outer shell of pencil cores, recycled paper and acetate composite cigarette rods.
• Recycled paper has been widely used in social life because of its energy saving, environmental protection and its advantages in price. At present, there are few reports on waterproof recycled papers for specific waterproof functions.
• the present invention is directed to the deficiencies of the prior art, and provides a waterproof recycled paper and a production method thereof.
• the waterproof recycled paper uses a pulp obtained by mixing waste pulp and plant fiber pulp as a raw material, and passes through an existing paper production process. Waterproofing additives are added to the papermaking section to make the paper waterproof.
• the technical solution adopted by the present invention is: a waterproof recycled paper, which is a pulping section of existing paper production, which uses waste paper pulp made from waste paper as raw material and raw material of papermaking plant fiber as raw material.
• the vegetable fiber slurry obtained by cooking is mixed as a pulp raw material, and washed, screened, bleached, hydrated and refined together; after the beating process of the papermaking section, a waterproof additive is added for slurrying, and the obtained paper material is re-flowed to Paper machine making.
• the water-repellent additive is: oil, resin, starch, pectin, soda, sulfite pulp, kraft pulp, polyacrylonitrile, marble powder, water-soluble polymer, sodium hydroxide.
• the adding of the waterproof additive for the pulping after the beating process of the papermaking section means: in the papermaking section, after the completion of the beating process, the additive containing the following weight percentage of the pulp is added to the pulp: grease 1% ⁇ 2% 2% ⁇ 2.5% resin, 1% ⁇ 2% starch, 1.5% ⁇ 2% pectin, 1.5% ⁇ 2% soda sulphate, 1.5% ⁇ 2% sulfite pulp, 1% ⁇ 2% sulphate pulp, Polyacrylonitrile 1% ⁇ 2%, marble powder 1% ⁇ 2%, water-soluble polymer 1% ⁇ 2%, sodium hydroxide 2.5% ⁇ 3.5%.
• the oil and fat is a vegetable oil and fat natural oil, such as soybean oil.
• the resin is a natural resin.
• the water-soluble polymer is a natural water-soluble polymer of starch, cellulose, vegetable gum, animal glue or natural water-soluble modified by natural animal and plant as raw materials.
• the chemically modified natural water-soluble polymer mainly includes modified starch and modified cellulose, including carboxymethyl starch, starch acetate, hydroxymethyl cellulose, and carboxymethyl cellulose.
• the weight ratio of the waste paper pulp mixed with the vegetable fiber slurry is: waste paper pulp 35-45%, vegetable fiber pulp 55-65%.
• the hydration, refining is to send the mixed slurry after washing, bleaching and washing to the refining system for refining for 30-240 min, and obtaining a enthalpy of 45° SR-48° SR. Pulp.
• the paper machine has a net pulp concentration of 0.1-1.2%.
• the waterproof recycled paper is used in the production of packaging materials, printing materials, decorative materials, and protective materials having waterproof properties.
• the waterproof recycled paper may be directly used as a fiber raw material after being used, and may be directly used as a fiber raw material for regeneration by the preparation process of the present invention, and used for preparing the waterproof recycled paper of the present invention.
• the present invention has the following beneficial effects:
• recycled paper there is no specific form of recycled paper to be a waterproof recycled paper.
• the innovation of the present invention is that it is a waterproof recycled paper by re-forming the structure.
• the current general waterproof paper is obtained by adding a water-repellent surface coating to the surface of the paper to obtain a waterproof effect, but the process may cause the surface of the produced paper to lose the aesthetic or writing ability of the paper, the present invention
• Waterproof recycled paper is not through The surface coating is waterproof, but the waterproofing function is added in the production process to obtain the waterproof function, so that the appearance and feeling of the paper and the main function of "writing" of the paper are not damaged;
• the waterproof paper has a waterproof function because it is waterproof by the surface coating, and therefore, when it is folded or rubbed a plurality of times, the waterproof layer on the surface thereof is destroyed, and the waterproof effect is lost, and the present invention
• the waterproof recycled paper itself is a waterproof material and has a long use time;
• the waterproof recycled paper of the present invention has the characteristics of being recyclable and environmentally friendly.
• the main raw materials used are plant fiber raw materials, and the added auxiliary materials and materials having waterproof function are selected from resin, pectin and cloud.
• Natural materials such as stone powder replace the waterproof rubber, waterproof rubber mold, PU, PVC, heavy oil and other chemicals used in traditional waterproof paper. Combined with the general paper production process, the paper can achieve better waterproof performance;
• the waterproof paper can not be written because it is a plastic mold or a non-decomposable substance, and is not easy to be recycled. However, if the waterproof recycled paper of the present invention is sufficiently ground, it can be reused in its production process. Become waterproof recycled paper;
• the waterproof recycled paper of the invention has the characteristics of internal and external waterproofing, surface writing or printing, colorless, non-toxic and tasteless, and can be dyed into any color without hindering its waterproof function, and can be used as wrapping paper and writing paper. Paper protective clothing, paper bags, etc., can also be recycled, and is an environmentally-friendly material; the waterproof recycled paper of the present invention uses waste paper as a main raw material to realize recycling of resources, and has a cost advantage.
• Example 1 The recycled paper of the present invention was processed by the following production method.
• the sulphate eucalyptus pulp is produced, wherein the eucalyptus wood chips and the tap water are subjected to sulphate cooking according to a 1:3 mixing ratio; the office waste paper is recovered, sorted, and the hydraulic pulper is used for pulping.
• the waste paper pulp is obtained, and then the waste paper pulp and the eucalyptus eucalyptus pulp are uniformly mixed according to 35% of the waste paper pulp and 65% by weight of the sulphate eucalyptus pulp to prepare a mixed slurry.
• the mixed slurry is washed, bleached, washed and screened in the original process, and then sent to a refining system for refining for 30 min to obtain a post-mortem slurry having a decomposing degree of 45° SR, concentrated, and set aside.
• the prepared pulp sheet is dispersed, decontaminated, and the original seminal pulp, beating process for seminal pulp, beating, after the completion of beating, adding the following percentage by weight of pulp to the pulp Pulping: 1% soybean oil, 2.2% rosin, 1% starch, 2% pectin, 2% soda, 2% sulfite pulp, 2% sulphate pulp, 1% polyacrylonitrile, marble powder 1 %, water-soluble polymer polymer 1%, sodium hydroxide 2.5%.
• Example 2 The recycled paper of the present invention was processed by the following production method.
• [0026] 1, according to the traditional pulping method to produce sulphite wheat straw pulp, wherein the material and the river water according to a ratio of 1: 3, into Purification of sulphite; recycling of office waste paper, sorting, pulping with hydraulic pulper, obtaining waste paper pulp, and then separating waste paper pulp and sulfurous acid according to 40% of waste paper pulp, 60% by weight of sulphite wheat straw pulp
• the salt wheat straw pulp is uniformly mixed to form a mixed slurry.
• the mixed slurry is washed, bleached, washed and screened in the original process, and then sent to a refining system for refining for 120 min to obtain a post-mortem slurry having a decompression degree of 46° SR, concentrated, and used.
• the prepared pulp sheet is dispersed, impurity-removed, and the original seminal pulp, beating process for semi-slurry, beating, after the completion of beating, adding the following percentage by weight of the pulp to the pulp
• Example 3 The recycled paper of the present invention was processed by the following production method.
• the bagasse pulp is produced, wherein the elm wood chips and the tap water are cooked according to a mixing ratio of 1:3; the office waste paper is recovered, sorted, and the pulp is pulped by a hydraulic pulper to obtain waste paper pulp. Then, the waste paper pulp and the bagasse pulp are uniformly mixed according to 45% of the waste paper pulp and 55% by weight of the bagasse pulp to prepare a mixed slurry.
• the mixed slurry is washed, bleached, washed and screened by the original process, and then sent to a refining system for refining for 240 min to obtain a post-mortem slurry having a decomposed degree of 48° SR, concentrated, and used.
• the prepared pulp sheet is dispersed, impurity-removed, and the original seminal pulp, beating process for semi-slurry, beating, after the completion of beating, adding the following percentage by weight of pulp to the pulp Pulping: 1.5% peanut oil, 2% rosin, 1% starch, 1.5% pectin, 1.6% soda ash, 1.5% sulfite pulp, 1.5% sulphate pulp, 1% polyacrylonitrile, 1% marble powder ⁇ 2%, water-soluble polymer polymer 1.5%, sodium hydroxide 3%.

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• 2013
  • 2013-07-16 CN CN2013102972145A patent/CN103397559A/zh active Pending
• 2014
  • 2014-03-04 WO PCT/CN2014/072873 patent/WO2015007098A1/zh active Application Filing
  • 2014-03-04 US US14/351,141 patent/US20160362842A1/en not_active Abandoned
  • 2014-03-04 CN CN201480000411.9A patent/CN104641039B/zh not_active Expired - Fee Related
  • 2014-03-04 JP JP2015558340A patent/JP6268385B2/ja not_active Expired - Fee Related
• 2015
  • 2015-03-24 HK HK15103007.8A patent/HK1202596A1/zh not_active IP Right Cessation

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