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 production method thereof, and more particularly to a waterproof recycled paper and production method thereof, which belongs to a field of paper and producing technique thereof.
• paper With the development of technology, the improvement of society and people's living standard, paper is widely applied in various fields and plays a variety of roles.
• industries such as navigation, construction and catering, paper materials with waterproof properties are required, such as nautical chart paper, waterproof packing paper, paperboard for fast food container, paper for cups, paper for slipper, waterproof and thermal insulation paper or paperboard.
• Waterproof property of the conventional paper is obtained by adding waterproof chemicals in paper pulp, e.g., the base paper is impregnated in wax, heavy oil is added in the paper pulp, water-proofing agent is coated on a surface of the paper manufactures.
• a Chinese patent with an application number of CN1237227C discloses a waterproof breathable paper made of fiber stuff and heavy oil, wherein the fiber stuff comprises wood fiber stuff, hemp fiber stuff, mulberry fiber stuff, nutshell fiber stuff, natural bamboo fiber stuff and natural reed fiber stuff.
• the waterproof breathable paper is manufactured by steps of producing a base paper by the fiber stuff, drying, and coating a layer of heavy oil on a surface of the base paper in a heavy oil bath. This type of paper has characteristics of water resistance, ventilation and great drawing force.
• Some kinds of waterproof paper produced by the conventional arts have poor waterproof performances, if the paper is frequently utilized or has frequent frictions on a surface thereof, the waterproof layer on a surface of the paper is destroyed, which even leads to the loss of waterproofing property. Due to lack of air permeability, toughness and strength, some kinds of the waterproof paper is easily damaged and has a short service life.
• Some conventional waterproof paper has waterproofing chemicals on a surface thereof, so writing and printing functions of the surface of the paper is affected. In order to get high waterproof performance, some kinds of the waterproof paper have excessive chemicals added therein, so that environmental performance of the paper is decreased.
• Recycled paper is made from waste paper, wherein the waste paper is manufactured by a plurality of processes including breaking into pieces, decolorizing and pulping.
• the recycled paper is used for producing notebook, wrapping paper, packing box, business card, shell for wrapping pencil core to produce environmental protection pencil, cigarette filter made of combination of recycled paper and acetate fiber. Due to advantages of energy conservation, environmental protection and low cost, the recycled paper is widely applied in social life. However, at present, waterproof recycled paper with specific waterproof properties is rarely disclosed.
• the present invention provides a waterproof recycled paper and a production method thereof
• the waterproof recycled paper of the present invention is produced by adding waterproof additive to the paper pulp in a papermaking section of a production process of the conventional paper, in such a manner that the paper has a waterproof function.
• a technical solution adopted by the present invention is as follows.
• a waterproof recycled paper which is produced by a method comprising steps of:
• waste paper pulp utilizing a raw material of waste paper by pulping process for producing conventional paper
• the waterproof additive comprises oil, starch, water-soluble high polymer and sodium hydroxide.
• the step adding waterproof additive for size mixing after beating the paper pulp in a papermaking section specifically comprises: during the papermaking section, after the process of beating the paper pulp is finished, adding additive accounting for mass fractions of the paper pulp as follows: oil 1% ⁇ 2%, resin 2% ⁇ 2.5%, starch 1% ⁇ 2%, pectin 1.5% ⁇ 2%, soda pulp 1.5% ⁇ 2%, sulfite pulp 1.5% ⁇ 2%, sulfate pulp 1% ⁇ 2%, polyacrylonitrile 1% ⁇ 2%, marble powder 1% ⁇ 2%, water-soluble high polymer 1% ⁇ 2%, and sodium hydroxide 2.5% ⁇ 3.5%.
• the oil is plant oil which is natural oil, such as soybean oil.
• the resin is natural resin.
• the water-soluble high polymer is natural water-soluble high polymer comprising starch, cellulose and vegetable gelatin which are extracted from natural plant or animal, or at least one natural water-soluble high polymer which is processed with chemical modification.
• a weight ratio of an over dry tablet to well water, river water or tap water is 1:3.
• the hydrating and grinding comprises a step of sending the mixed paper pulp which is processed with washing, bleaching and screening to a grinding system to grind for 30-240 min, so as to obtain beat pulp having a beating degree of 45° and SR-48°.
• a concentration of paper pulp for loading to sieves of the papermaking machine is 0.1-1.2%.
• the waterproof recycled paper is applied in manufacturing and processing packaging material, printing material, decorative material and protective material.
• the waterproof recycled paper which is utilized and processed with recycling and purifying, is applied in the process for producing the waterproof recycled paper for serving as a fibrous material.
• beneficial effects of the present invention are as follows.
• the conventional waterproof paper generally gets a waterproof property by coating a waterproof layer on a surface thereof.
• the process causes that a surface of paper produced thereby loses aesthetic perception or writing property.
• Waterproof property of the waterproof recycled paper of the present invention is not obtained by coating a waterproof layer on a surface thereof, but by adding waterproof additive to the paper pulp during a production process, thus, appearances and writing property of the paper is not damaged.
• the conventional waterproof paper generally gets a waterproof property by coating a waterproof layer on a surface thereof, so when the paper is folded or rubbed for a plurality of times, the water proof layer on the surface is destroyed and the waterproof property is lost.
• a whole of the waterproof recycled paper of the present invention is waterproof material and thus has a longer service life.
• the waterproof recycled paper of the present invention is renewable and is environmentally friendly.
• a main raw material adopts plant fiber, accessories and waterproof additives adopt natural material such as resin, pectin and marble powder to replace chemicals such as waterproof glue, waterproof plastic mold, PU, PVC and heavy oil which are adopted by the conventional waterproof paper.
• the raw materials combining with the conventional process of papermaking, the paper can obtain better waterproof property.
• the surface coating of general waterproof paper is plastic mold or other non-decomposable substances, and thus can not be writing or even recycled.
• the waterproof recycled paper of the present invention can be renewed by the production process to produce waterproof recycled paper after being fully grinded.
• the waterproof recycled paper of the present invention has waterproof property both on an outer and an inner surface thereof.
• the surfaces of the paper can be written or printed.
• the waterproof paper of the present invention has characteristics of white color, non-toxic and no smell.
• the paper can be dyed to any color without damaging the waterproof property thereof.
• the waterproof paper of the present invention can be utilized as wrapping paper, writing paper, paper for manufacturing protective clothing or paper bag, and can be recycled and thus is an environmental friendly paper.
• the waterproof recycled paper of the present invention adopts waste paper for serving as a main raw material, which achieves recycling the resources and has cost advantages.
• the waterproof recycled paper of the present invention is produced by the following method comprising steps of:
• the waterproof recycled paper of the present invention is produced by the following method comprising steps of:
• the waterproof recycled paper of the present invention is produced by the following method comprising steps of:

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Paper (AREA)

Applications Claiming Priority (3)

Publications (1)

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Family Applications (1)

Country Status (4)

Cited By (8)

Families Citing this family (13)

Citations (2)

Family Cites Families (7)

• 2013
  • 2013-07-16 CN CN2013102972145A patent/CN103397559A/zh active Pending
• 2014
  • 2014-03-04 WO PCT/CN2014/072873 patent/WO2015007098A1/zh not_active Ceased
  • 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
  • 2014-03-04 US US14/351,141 patent/US20160362842A1/en not_active Abandoned

Patent Citations (2)

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