CN112593462A - Extrusion molding's calcium corrugated paper - Google Patents

Extrusion molding's calcium corrugated paper Download PDF

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Publication number
CN112593462A
CN112593462A CN202011556812.6A CN202011556812A CN112593462A CN 112593462 A CN112593462 A CN 112593462A CN 202011556812 A CN202011556812 A CN 202011556812A CN 112593462 A CN112593462 A CN 112593462A
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CN
China
Prior art keywords
parts
paper
manufacturing
calcium
formaldehyde resin
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.)
Pending
Application number
CN202011556812.6A
Other languages
Chinese (zh)
Inventor
杜威
范海亮
陶香君
邢连成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chuzhou Cigarette Materials Factory
Original Assignee
Chuzhou Cigarette Materials Factory
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chuzhou Cigarette Materials Factory filed Critical Chuzhou Cigarette Materials Factory
Priority to CN202011556812.6A priority Critical patent/CN112593462A/en
Publication of CN112593462A publication Critical patent/CN112593462A/en
Pending legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J3/00—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
    • D21J3/12—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds of sheets; of diaphragms
    • 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
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/36—Inorganic fibres or flakes
    • 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
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/14—Carboxylic acids; 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
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/47—Condensation polymers of aldehydes or ketones
    • 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
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
    • D21H17/57—Polyureas; Polyurethanes
    • 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
    • D21H17/60—Waxes
    • 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
    • D21H17/63—Inorganic compounds
    • D21H17/64—Alkaline compounds
    • 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
    • D21H17/63—Inorganic compounds
    • D21H17/66—Salts, e.g. alums
    • 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
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • 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
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/675—Oxides, hydroxides or carbonates
    • 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
    • D21H21/38—Corrosion-inhibiting agents or anti-oxidants

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Paper (AREA)

Abstract

The invention discloses extrusion molding calcium corrugated paper, which is manufactured by burdening, manufacturing paper pulp, manufacturing raw paper, manufacturing paper board and molding the paper board; the paper pulp comprises the following raw materials in parts by weight: 45-60 parts of plant fiber, 40-50 parts of ceramic fiber, 20-30 parts of aluminum hydroxide, 5-15 parts of urea-formaldehyde resin, 10-20 parts of melamine formaldehyde resin, 20-30 parts of starch, 10-20 parts of chlorinated paraffin, 2-3 parts of butyl acetate, 1-1.5 parts of sodium polyphosphate, 1-1.8 parts of powder sand, 10-20 parts of calcium carbonate, 2-6 parts of antioxidant and 2-10 parts of lubricant. The extrusion-molded calcium corrugated paper is formed by placing corrugated paper pulp prepared by the corrugated paper pulp manufacturing method into a mold, and the obtained corrugated paper board has the characteristics of fire resistance, flame retardance and high temperature resistance; the corrugated board does not deform when meeting water, is not eroded by water, and has the characteristics of water resistance and moisture resistance.

Description

Extrusion molding's calcium corrugated paper
Technical Field
The invention relates to the technical field of corrugated paper, in particular to extrusion-molded calcium corrugated paper.
Background
In recent years, with the progress of industrial technology, the application field of the calcium cellulose materials in packaging is increasingly expanded, and the trend of replacing part of traditional packaging materials such as wood by calcium cellulose boards is a development trend. The project has the advantages of low investment cost, good labor environment, high strength, attractive appearance, moisture resistance, no toxicity, corrosion resistance, high recycling rate and the like, so the project is always the most praised product in packaging materials.
Disclosure of Invention
The invention aims to provide extrusion-molded calcium corrugated paper, which solves the technical defects.
In order to achieve the purpose, the invention provides the following technical scheme:
the extrusion molding calcium corrugated paper is manufactured by burdening, manufacturing paper pulp, manufacturing raw paper, manufacturing paper board and forming the paper board; the paper pulp comprises the following raw materials in parts by weight:
45-60 parts of plant fiber, 40-50 parts of ceramic fiber, 20-30 parts of aluminum hydroxide, 5-15 parts of urea-formaldehyde resin, 10-20 parts of melamine formaldehyde resin, 20-30 parts of starch, 10-20 parts of chlorinated paraffin, 2-3 parts of butyl acetate, 1-1.5 parts of sodium polyphosphate, 1-1.8 parts of powder sand, 10-20 parts of calcium carbonate, 2-6 parts of antioxidant and 2-10 parts of lubricant.
The preparation of the extrusion molding calcium-containing corrugated paper comprises batching, paper pulp preparation, raw paper preparation, paper board preparation and paper board molding; the paper pulp comprises the following raw materials in parts by weight:
50-60 parts of plant fiber, 45-50 parts of ceramic fiber, 25-30 parts of aluminum hydroxide, 7-15 parts of urea-formaldehyde resin, 12-20 parts of melamine formaldehyde resin, 25-30 parts of starch, 15-20 parts of chlorinated paraffin, 2-3 parts of butyl acetate, 1.1-1.5 parts of sodium polyphosphate, 1.1-1.8 parts of powder sand, 12-20 parts of calcium carbonate, 3-6 parts of antioxidant and 4-10 parts of lubricant.
The preparation of the extrusion molding calcium-containing corrugated paper comprises batching, paper pulp preparation, raw paper preparation, paper board preparation and paper board molding; the paper pulp comprises the following raw materials in parts by weight:
50-58 parts of plant fiber, 45-48 parts of ceramic fiber, 25-28 parts of aluminum hydroxide, 7-13 parts of urea-formaldehyde resin, 12-18 parts of melamine formaldehyde resin, 25-28 parts of starch, 15-18 parts of chlorinated paraffin, 2-3 parts of butyl acetate, 1.1-1.4 parts of sodium polyphosphate, 1.1-1.7 parts of powder sand, 12-18 parts of calcium carbonate, 3-5 parts of antioxidant and 4-8 parts of lubricant.
The preparation of the extrusion molding calcium-containing corrugated paper comprises batching, paper pulp preparation, raw paper preparation, paper board preparation and paper board molding; the paper pulp comprises the following raw materials in parts by weight:
53 parts of plant fiber, 45 parts of ceramic fiber, 25 parts of aluminum hydroxide, 10 parts of urea-formaldehyde resin, 15 parts of melamine-formaldehyde resin, 25 parts of starch, 15 parts of chlorinated paraffin, 2.5 parts of butyl acetate, 1.3 parts of sodium polyphosphate, 1.4 parts of powder sand, 15 parts of calcium carbonate, 4 parts of antioxidant and 6 parts of lubricant.
Compared with the prior art, the invention has the beneficial effects that:
the extrusion-molded calcium corrugated paper is formed by placing corrugated paper pulp prepared by the corrugated paper pulp manufacturing method into a mold, and the obtained corrugated paper board has the characteristics of fire resistance, flame retardance and high temperature resistance; the corrugated board does not deform when meeting water, is not corroded by water and has the characteristics of water resistance and moisture resistance; the corrugated paper pulp has simple manufacturing method, good pulping performance of the raw materials, good quality of the obtained paper pulp, high pulping yield and high fiber bonding force, and provides excellent paper pulp raw materials for manufacturing corrugated paper.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Example 1
The extrusion molding calcium corrugated paper is manufactured by burdening, manufacturing paper pulp, manufacturing raw paper, manufacturing paper board and forming the paper board; the paper pulp comprises the following raw materials in parts by weight:
45 parts of plant fiber, 40 parts of ceramic fiber, 20 parts of aluminum hydroxide, 5-parts of urea-formaldehyde resin, 10 parts of melamine-formaldehyde resin, 20 parts of starch, 10 parts of chlorinated paraffin, 2 parts of butyl acetate, 1 part of sodium polyphosphate, 1 part of powder sand, 10 parts of calcium carbonate, 2 parts of antioxidant and 2 parts of lubricant.
Example 2
The extrusion molding calcium corrugated paper is manufactured by burdening, manufacturing paper pulp, manufacturing raw paper, manufacturing paper board and forming the paper board; the paper pulp comprises the following raw materials in parts by weight:
60 parts of plant fiber, 50 parts of ceramic fiber, 30 parts of aluminum hydroxide, 15 parts of urea-formaldehyde resin, 20 parts of melamine formaldehyde resin, 30 parts of starch, 20 parts of chlorinated paraffin, 3 parts of butyl acetate, 1.5 parts of sodium polyphosphate, 1.8 parts of powder sand, 20 parts of calcium carbonate, 6 parts of antioxidant and 10 parts of lubricant.
Example 3
The extrusion molding calcium corrugated paper is manufactured by burdening, manufacturing paper pulp, manufacturing raw paper, manufacturing paper board and forming the paper board; the paper pulp comprises the following raw materials in parts by weight:
53 parts of plant fiber, 45 parts of ceramic fiber, 25 parts of aluminum hydroxide, 10 parts of urea-formaldehyde resin, 15 parts of melamine-formaldehyde resin, 25 parts of starch, 15 parts of chlorinated paraffin, 2.5 parts of butyl acetate, 1.3 parts of sodium polyphosphate, 1.4 parts of powder sand, 15 parts of calcium carbonate, 4 parts of antioxidant and 6 parts of lubricant.
The extrusion-molded calcium corrugated paper is formed by placing corrugated paper pulp prepared by the corrugated paper pulp manufacturing method into a mold, and the obtained corrugated paper board has the characteristics of fire resistance, flame retardance and high temperature resistance; the corrugated board does not deform when meeting water, is not corroded by water and has the characteristics of water resistance and moisture resistance; the corrugated paper pulp has simple manufacturing method, good pulping performance of the raw materials, good quality of the obtained paper pulp, high pulping yield and high fiber bonding force, and provides excellent paper pulp raw materials for manufacturing corrugated paper.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims (4)

1. The extrusion molding calcium corrugated paper is characterized in that the manufacturing process comprises the steps of batching, paper pulp manufacturing, raw paper manufacturing, paper board manufacturing and paper board molding; the paper pulp comprises the following raw materials in parts by weight:
45-60 parts of plant fiber, 40-50 parts of ceramic fiber, 20-30 parts of aluminum hydroxide, 5-15 parts of urea-formaldehyde resin, 10-20 parts of melamine formaldehyde resin, 20-30 parts of starch, 10-20 parts of chlorinated paraffin, 2-3 parts of butyl acetate, 1-1.5 parts of sodium polyphosphate, 1-1.8 parts of powder sand, 10-20 parts of calcium carbonate, 2-6 parts of antioxidant and 2-10 parts of lubricant.
2. The extrusion molding calcium corrugated paper as claimed in claim 1, wherein the manufacturing process comprises batching, paper pulp manufacturing, base paper manufacturing, paper board manufacturing and paper board molding; the paper pulp comprises the following raw materials in parts by weight:
50-60 parts of plant fiber, 45-50 parts of ceramic fiber, 25-30 parts of aluminum hydroxide, 7-15 parts of urea-formaldehyde resin, 12-20 parts of melamine formaldehyde resin, 25-30 parts of starch, 15-20 parts of chlorinated paraffin, 2-3 parts of butyl acetate, 1.1-1.5 parts of sodium polyphosphate, 1.1-1.8 parts of powder sand, 12-20 parts of calcium carbonate, 3-6 parts of antioxidant and 4-10 parts of lubricant.
3. The extrusion molding calcium corrugated paper as claimed in claim 1, wherein the manufacturing process comprises batching, paper pulp manufacturing, base paper manufacturing, paper board manufacturing and paper board molding; the paper pulp comprises the following raw materials in parts by weight:
50-58 parts of plant fiber, 45-48 parts of ceramic fiber, 25-28 parts of aluminum hydroxide, 7-13 parts of urea-formaldehyde resin, 12-18 parts of melamine formaldehyde resin, 25-28 parts of starch, 15-18 parts of chlorinated paraffin, 2-3 parts of butyl acetate, 1.1-1.4 parts of sodium polyphosphate, 1.1-1.7 parts of powder sand, 12-18 parts of calcium carbonate, 3-5 parts of antioxidant and 4-8 parts of lubricant.
4. The extrusion molding calcium corrugated paper as claimed in claim 1, wherein the manufacturing process comprises batching, paper pulp manufacturing, base paper manufacturing, paper board manufacturing and paper board molding; the paper pulp comprises the following raw materials in parts by weight:
53 parts of plant fiber, 45 parts of ceramic fiber, 25 parts of aluminum hydroxide, 10 parts of urea-formaldehyde resin, 15 parts of melamine-formaldehyde resin, 25 parts of starch, 15 parts of chlorinated paraffin, 2.5 parts of butyl acetate, 1.3 parts of sodium polyphosphate, 1.4 parts of powder sand, 15 parts of calcium carbonate, 4 parts of antioxidant and 6 parts of lubricant.
CN202011556812.6A 2020-12-25 2020-12-25 Extrusion molding's calcium corrugated paper Pending CN112593462A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011556812.6A CN112593462A (en) 2020-12-25 2020-12-25 Extrusion molding's calcium corrugated paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011556812.6A CN112593462A (en) 2020-12-25 2020-12-25 Extrusion molding's calcium corrugated paper

Publications (1)

Publication Number Publication Date
CN112593462A true CN112593462A (en) 2021-04-02

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5665205A (en) * 1995-01-19 1997-09-09 International Paper Company Method for improving brightness and cleanliness of secondary fibers for paper and paperboard manufacture
CN105178091A (en) * 2015-08-13 2015-12-23 合肥龙发包装有限公司 Waterproof corrugated paper pulp and producing method thereof
WO2016083667A1 (en) * 2014-11-24 2016-06-02 Paptic Ltd Fiber sheets and structures comprising fiber sheets
CN109252417A (en) * 2018-08-27 2019-01-22 扬中市惠丰包装有限公司 A kind of corrugation paper pulp and preparation method thereof with fire resistance characteristic
CN110804896A (en) * 2019-11-13 2020-02-18 鲍双铭 Corrugated paper pulp with waterproof and fireproof characteristics

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5665205A (en) * 1995-01-19 1997-09-09 International Paper Company Method for improving brightness and cleanliness of secondary fibers for paper and paperboard manufacture
WO2016083667A1 (en) * 2014-11-24 2016-06-02 Paptic Ltd Fiber sheets and structures comprising fiber sheets
CN105178091A (en) * 2015-08-13 2015-12-23 合肥龙发包装有限公司 Waterproof corrugated paper pulp and producing method thereof
CN109252417A (en) * 2018-08-27 2019-01-22 扬中市惠丰包装有限公司 A kind of corrugation paper pulp and preparation method thereof with fire resistance characteristic
CN110804896A (en) * 2019-11-13 2020-02-18 鲍双铭 Corrugated paper pulp with waterproof and fireproof characteristics

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Application publication date: 20210402