CN113445354A - Flame-retardant paper and preparation method thereof - Google Patents

Flame-retardant paper and preparation method thereof Download PDF

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Publication number
CN113445354A
CN113445354A CN202010220730.8A CN202010220730A CN113445354A CN 113445354 A CN113445354 A CN 113445354A CN 202010220730 A CN202010220730 A CN 202010220730A CN 113445354 A CN113445354 A CN 113445354A
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China
Prior art keywords
flame retardant
fiber
flame
latex
retardant
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CN202010220730.8A
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Chinese (zh)
Inventor
江骁雅
陈雪峰
李政
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China National Pulp and Paper Research Institute
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China National Pulp and Paper Research Institute
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Priority to CN202010220730.8A priority Critical patent/CN113445354A/en
Publication of CN113445354A publication Critical patent/CN113445354A/en
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    • 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
    • D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
    • 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
    • D21H13/38—Inorganic fibres or flakes siliceous
    • 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
    • D21H13/38—Inorganic fibres or flakes siliceous
    • D21H13/40—Inorganic fibres or flakes siliceous vitreous, e.g. mineral wool, glass 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
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/36—Inorganic fibres or flakes
    • D21H13/38—Inorganic fibres or flakes siliceous
    • D21H13/42—Asbestos
    • 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
    • D21H17/13—Silicon-containing compounds
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    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
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    • 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
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    • 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
    • D21H17/35—Polyalkenes, e.g. polystyrene
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    • 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
    • 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
    • D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
    • D21H17/44—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups cationic
    • 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
    • D21H17/49—Condensation polymers of aldehydes or ketones with compounds containing hydrogen bound to nitrogen
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    • 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
    • D21H17/49—Condensation polymers of aldehydes or ketones with compounds containing hydrogen bound to nitrogen
    • D21H17/51—Triazines, e.g. melamine
    • 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
    • D21H17/55—Polyamides; Polyaminoamides; Polyester-amides
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    • 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
    • D21H17/56—Polyamines; Polyimines; Polyester-imides
    • 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
    • D21H21/06—Paper forming aids
    • D21H21/10—Retention agents or drainage improvers
    • 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
    • D21H21/06—Paper forming aids
    • D21H21/12—Defoamers
    • 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
    • D21H21/18—Reinforcing agents
    • D21H21/20—Wet strength 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
    • 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
    • D21H21/34—Ignifugeants

Abstract

The invention belongs to the technical field of flame-retardant materials, and particularly relates to flame-retardant paper and a preparation method thereof. The invention provides flame-retardant paper, which comprises the following components: flame retardant, mixed fiber, latex, flocculant, wet strength agent and defoaming agent. The latex is used as the adhesive, so that the inorganic flame retardant and the mixed fiber are organically bonded, and the retention of the inorganic flame retardant is greatly improved by matching with the use of the flocculant; the plant fibers in the mixed fibers provide framework supporting and reinforcing effects for the flame-retardant paper, and the inorganic fibers can improve the water filtration performance of the slurry and also have flame retardant capability. The invention also provides a preparation method of the flame retardant paper. The flame-retardant paper provided by the invention has the advantages of high flame retardant retention rate, small additive amount of the auxiliary agent, excellent flame-retardant property, simple preparation method and low manufacturing cost.

Description

Flame-retardant paper and preparation method thereof
Technical Field
The invention belongs to the technical field of flame-retardant materials, and particularly relates to flame-retardant paper and a preparation method thereof.
Background
Paper-based materials are flammable. To meet the needs of a particular location, it is necessary to flame retard the paper-based material. The addition of the flame retardant is a main way for improving the flame retardant performance of the paper. The flame retardant has various types, wherein the inorganic flame retardant has the characteristics of low smoke, low toxicity, good thermal stability, lasting effect and the like, and is rapidly developed in recent years.
There are two main methods for adding inorganic flame retardant into flame retardant paper. One method is a coating method, the consumption of the flame retardant is low, the influence on the physical properties of paper is small, but the flame retardance can not be given to the interior of the paper, and the flame retardant effect is not ideal. The second method is an in-pulp addition method, the manufacturing is simple, the flame retardant is uniformly distributed, but the loss of the flame retardant is serious.
Patent application No. 201910589796.1, "a method for preparing halogen-free sound-absorbing flame-retardant paper", describes a method for preparing flame-retardant paper using magnesium hydroxide as main flame retardant, in which the addition mode of magnesium hydroxide is mainly in-situ synthesis and impregnation. Polyvinyl alcohol fibers are also used as binders. Patent application No. 201410716662.9, "a flame retardant paper and its preparation method" describes that the flame retardant paper is prepared by adding in slurry, but the flame retardant contains phosphorus, and the preparation process is complicated, and the retention effect is not good.
Disclosure of Invention
In view of the above, the invention aims to provide flame-retardant paper which has the characteristics of high flame retardant retention rate, small additive amount of an auxiliary agent and excellent flame retardant property. The invention also provides a preparation method of the flame retardant paper, which is simple in process and low in cost.
In order to achieve the above purpose, the invention provides the following technical scheme:
the invention provides flame-retardant paper which comprises the following components in parts by weight:
50-80 parts of a flame retardant;
6-25 parts of mixed fibers;
10-20 parts of latex;
0.1-0.3 part of a flocculating agent;
0.1-0.3 part of wet strength agent;
0.01-0.1 part of defoaming agent.
Preferably, the flame retardant is one or more of aluminum hydroxide, magnesium aluminum hydrotalcite, zinc borate and antimony trioxide; more preferably, the flame retardant is one or more of aluminum hydroxide, magnesium hydroxide and magnesium aluminum hydrotalcite. The particle size of the flame retardant is 300-2000 meshes.
Preferably, the mixed fiber comprises plant fiber and inorganic fiber; the mass ratio of the plant fibers to the inorganic fibers is 2: 1-4.
Preferably, the plant fiber is one or more of cotton fiber, hemp fiber, bamboo fiber, softwood fiber and eucalyptus fiber;
the inorganic fiber is one or more of asbestos, mineral wool, sepiolite fiber, ceramic fiber, glass fiber and glass wool fiber.
Preferably, the latex is one or more of styrene-butadiene latex, butyronitrile latex, acrylic latex, carboxylic styrene-butadiene latex and carboxylic butyronitrile latex.
Preferably, the flocculant comprises polyaluminium chloride and cationic polyacrylamide; the mass ratio of the polyaluminium chloride to the cationic polyacrylamide is (1-2) to 1.
Preferably, the wet strength agent is one or more of polyamide epichlorohydrin resin, polyethyleneimine, melamine formaldehyde resin and urea formaldehyde resin.
Preferably, the defoaming agent is a silicone defoaming agent.
The invention also provides a preparation method of the flame retardant paper, which comprises the following steps:
providing a mixed fiber enzymolysis solution;
mixing the mixed fiber degradation liquid, the flame retardant and the latex to obtain a first mixture;
mixing the first mixture, a flocculating agent, a wet strength agent and a defoaming agent to obtain a second mixture;
diluting the second mixture to obtain slurry;
and manufacturing the pulp to obtain the flame retardant paper.
Preferably, the mass concentration of the mixed fiber degradation liquid is 0.5-2%; the solid content of the slurry is 1.5-3%.
The invention provides flame-retardant paper which comprises the following components in parts by weight: 50-80 parts of a flame retardant; 6-25 parts of mixed fibers; 10-20 parts of latex; 0.1-0.3 part of a flocculating agent; 0.1-0.3 part of wet strength agent; 0.01-0.1 part of defoaming agent. In the present invention, the flame retardant provides flame retardant properties to the flame retardant paper; the plant fibers in the mixed fibers have the functions of skeleton support and reinforcement and can be well combined with latex; the inorganic fibers in the mixed fibers can improve the drainage performance of the slurry, have flame retardant capability and can be well combined with latex; the latex can organically bond the components together, and is particularly beneficial to bonding the flame retardant and the mixed fibers into a net film; the flocculating agent, the wet strength agent and the defoaming agent are used as auxiliary agents, and are beneficial to forming and enhancing the flame retardant paper. The flame-retardant paper provided by the invention has the advantages of high flame retardant retention rate, small additive amount of the auxiliary agent, excellent flame-retardant property, simple papermaking method and low manufacturing cost.
Detailed Description
The invention provides flame-retardant paper which comprises the following components in parts by weight:
50-80 parts of a flame retardant;
6-25 parts of mixed fibers;
10-20 parts of latex;
0.1-0.3 part of a flocculating agent;
0.1-0.3 part of wet strength agent;
0.01-0.1 part of defoaming agent.
In the present invention, all the components are commercially available products well known to those skilled in the art unless otherwise specified.
The flame retardant paper comprises, by mass, 50-80 parts of a flame retardant, preferably 60-75 parts, and more preferably 65-70 parts. In the invention, the flame retardant is one or more of aluminum hydroxide, magnesium aluminum hydrotalcite, zinc borate and antimony trioxide; more preferably, the flame retardant is one or more of aluminum hydroxide, magnesium hydroxide and magnesium aluminum hydrotalcite. In the invention, the particle size of the flame retardant is preferably 300-2000 meshes, more preferably 325-1340 meshes, and still more preferably 500-1250 meshes. The flame retardant provided by the invention provides flame retardant property for the flame retardant paper.
Based on the mass parts of the flame retardant, the flame-retardant paper provided by the invention comprises 6-25 parts of mixed fibers, preferably 8-20 parts, and more preferably 10-15 parts. In the present invention, the mixed fiber preferably includes a plant fiber and an inorganic fiber. In the invention, the mass ratio of the plant fibers to the inorganic fibers is preferably 2: 1-4, more preferably 2: 1.2-3, and even more preferably 2: 1.6-2. In the present invention, the plant fiber is preferably one or more of cotton fiber, hemp fiber, bamboo fiber, softwood fiber and hardwood fiber. The inorganic fiber is one or more of asbestos, mineral wool, sepiolite fiber, ceramic fiber, glass fiber and glass wool fiber.
The vegetable fiber in the mixed fiber provided by the invention has high strength, good combination with latex and low price; the inorganic fiber can improve the problem of difficult dehydration in the papermaking process, has a flame retardant effect, and is beneficial to the improvement of the forming physics and the flame retardant property of the flame retardant paper through the reasonable arrangement of the types and the proportion content of the plant fiber and the inorganic fiber.
Based on the mass parts of the flame retardant, the flame-retardant paper provided by the invention comprises 10-20 parts of latex, preferably 11-18 parts, and more preferably 12-16 parts. In the present invention, the latex is preferably one or more of a styrene-butadiene latex, a nitrile-butadiene latex, an acrylic latex, a carboxylated styrene-butadiene latex and a carboxylated nitrile-butadiene latex, and more preferably a styrene-butadiene latex and a nitrile-butadiene latex. When the latex is a mixture of styrene-butadiene latex and butyronitrile latex, the mass ratio of the styrene-butadiene latex to the butyronitrile latex is preferably (2-3) to 2, more preferably (2.2-2.8) to 2, and most preferably 4: 3. In the invention, the latex is a key component for manufacturing the flame-retardant paper by using paper, and is beneficial to organically bonding the components together, particularly bonding the flame retardant and the fibers into a net film.
Based on the mass parts of the flame retardant, the flame retardant paper provided by the invention comprises 0.1-0.3 part of flocculant, preferably 0.12-0.25 part, and more preferably 0.15-0.2 part. In the present invention, the flocculant preferably comprises polyaluminum chloride and cationic polyacrylamide; the mass ratio of the polyaluminium chloride to the cationic polyacrylamide is preferably (1-2) to 1, more preferably (1.2-1.8) to 1, and still more preferably (1.4-1.6) to 1.
Based on the mass parts of the flame retardant, the flame retardant paper provided by the invention comprises 0.1-0.3 part of wet strength agent, preferably 0.12-0.25 part, and more preferably 0.15-0.2 part. In the invention, the wet strength agent is one or more of polyamide epichlorohydrin resin, polyethyleneimine, melamine formaldehyde resin and urea formaldehyde resin.
Based on the mass parts of the flame retardant, the flame-retardant paper provided by the invention comprises 0.01-0.1 part of defoaming agent, preferably 0.03-0.08 part, and more preferably 0.04-0.07 part. In the present invention, the defoaming agent is preferably a silicone-based defoaming agent. The flocculating agent, the wet strength agent and the defoaming agent are used as auxiliary agents, and are beneficial to forming and enhancing the flame retardant paper.
The flame-retardant paper provided by the invention has the advantages of high flame retardant retention rate, small additive amount of the auxiliary agent and excellent flame retardant property.
The invention also provides a preparation method of the flame retardant paper in the technical scheme, which comprises the following steps:
providing a mixed fiber enzymolysis solution;
mixing the mixed fiber degradation liquid, the flame retardant and the latex to obtain a first mixture;
mixing the first mixture, a flocculating agent, a wet strength agent and a defoaming agent to obtain a second mixture;
diluting the second mixture to obtain slurry;
and manufacturing the pulp to obtain the flame retardant paper.
In the invention, the components in the preparation method are consistent with the components of the flame retardant paper in the technical scheme, and are not described again.
The invention provides a mixed fiber degradation liquid. In the invention, the mass concentration of the mixed fiber degradation liquid is preferably 0.5-2%, more preferably 0.7-1.7%, and still more preferably 1-1.5%. In the invention, the mixed fiber fluffing liquid is preferably obtained by mixing and fluffing mixed fibers and water; the time for defibering is not particularly limited, and the mixed fibers and water can be mixed and defibered until the fibers are completely dispersed into single fibers. In the present invention, the defibering apparatus is preferably a beater.
After the mixed fiber degradation liquid is obtained, the mixed fiber degradation liquid, the flame retardant and the latex are mixed to obtain a first mixture. In the present invention, the latex is preferably provided in the form of a latex dilution; the mass concentration of the latex diluent is preferably 5-10%, more preferably 6-9%, and still more preferably 7-8%. The mixing method of the present invention is not particularly limited, and a mixing method known to those skilled in the art may be used.
After the first mixture is obtained, the first mixture, the flocculating agent, the wet strength agent and the defoaming agent are mixed to obtain a second mixture. In the present invention, the flocculant is preferably provided in the form of a flocculant dilution; the mass concentration of the flocculant diluent is preferably 0.5-1%, more preferably 0.6-0.9%, and still more preferably 0.7-0.8%. In the present invention, the wet strength agent is preferably provided in the form of a wet strength agent diluent; the mass concentration of the wet strength agent diluent is preferably 0.5-1%, more preferably 0.6-0.9%, and still more preferably 0.7-0.8%. In the present invention, the defoamer is preferably provided in the form of a defoamer diluent; the mass concentration of the defoamer diluent is preferably 0.5-1%, more preferably 0.6-0.9%, and still more preferably 0.7-0.8%. The mixing is not particularly limited in the present invention, and may be carried out by a mixing method known to those skilled in the art, specifically, stirring. According to the invention, the mixed fiber degradation liquid, the flame retardant and the latex are mixed firstly, and then the flocculant, the wet strength agent and the defoaming agent are added to prevent the latex, the flocculant, the wet strength agent and the defoaming agent from losing effectiveness.
After the second mixture is obtained, the second mixture is diluted to obtain the slurry. In the present invention, the diluent for dilution is preferably water; the water used in the present invention is not particularly limited, and may be water known to those skilled in the art, specifically, deionized water, distilled water or tap water. The dilution method is not particularly limited in the present invention, and may be a dilution method known to those skilled in the art. In the invention, the solid content of the slurry is preferably 1.5-3%, more preferably 1.8-2.8%, and still more preferably 2-2.4%.
After the sizing agent is obtained, the sizing agent is manufactured by paper making to obtain the flame retardant paper. In the invention, the paper making is preferably wet paper making; the wet papermaking preferably includes wet forming, pressing, drying and curling. In the present invention, the paper making apparatus is preferably a fourdrinier machine. In the invention, the speed of the paper machine for papermaking is preferably 10-30 m/min, the length of the net table is preferably 10-30 m, the width is preferably 200-1000 mm, the number of polyester meshes is preferably 80-90 meshes, the pressure of a pressing section is preferably 0-0.5 MPa, and the drying temperature of a drying cylinder is preferably 80-110 ℃.
To further illustrate the present invention, the following examples are given to describe the flame retardant paper and the method for preparing the same in detail, but they should not be construed as limiting the scope 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.
Example 1
The flame-retardant material comprises the following components in parts by weight:
69.3 parts of flame retardant, which is prepared by mixing 1250-mesh aluminum hydroxide and 800-mesh magnesium hydroxide according to the mass ratio of 1: 2;
14.4 parts of mixed fiber, which is obtained by mixing softwood fiber and glass wool fiber according to the mass ratio of 1: 1; the beating degree of the softwood fibers is 17 DEG SR;
12.5 parts of latex, which is prepared by mixing styrene-butadiene latex and butyronitrile latex according to the mass ratio of 4: 3;
0.15 part of flocculant, which is prepared by mixing polyaluminium chloride and cationic polyacrylamide according to the mass ratio of 1: 1;
0.15 part of wet strength agent which is polyamide epichlorohydrin resin;
0.05 part of defoaming agent and JF-05B type organic silicon defoaming agent.
The preparation method of the flame-retardant paper comprises the following steps:
the mixed fiber fluffing liquid is obtained by mixing and fluffing mixed fibers and water in a beater, and the mass concentration of the mixed fiber fluffing liquid is 1%;
diluting the latex to a mass concentration of 10 percent by taking water as a diluent, diluting the flocculant to a mass concentration of 1 percent, diluting the wet strength agent to a mass concentration of 1 percent, and diluting the defoaming agent to a mass concentration of 1 percent for later use;
adding the flame retardant and the diluted latex into a beater, defibering and mixing to obtain a first mixture;
stirring and uniformly mixing the obtained first mixture, the diluted flocculating agent, the diluted wet strength agent and the diluted defoaming agent to obtain a second mixture;
adding water to dilute the obtained second mixture until the solid content is 2% to obtain slurry;
and (3) feeding the obtained slurry to a fourdrinier paper machine for papermaking, wherein papermaking process parameters are as follows: the speed of the paper machine is 10m/min, the length of the screen table is 10m, the width is 600mm, an 80-mesh polyester screen is used, the pressure of a pressing section is 0.1MPa, and the drying temperature of a drying cylinder is 98 ℃, so that the flame retardant paper is obtained.
The obtained flame retardant paper is quantitatively detected according to GB/T451.2-2002, and the test result is 320.0 +/-10.0 g/m2(ii) a The thickness of the obtained flame retardant paper is tested according to GB/T451.3-2002, and the test result is 0.40 +/-0.02 mm; the tightness of the obtained flame-retardant paper is calculated according to the relation of the tightness, namely the quantitative/thickness, and the calculation result is 0.8 +/-0.06 g/cm3(ii) a The tensile index of the obtained flame retardant paper is tested according to GB/T12914-2008, and the test result is 4.38 +/-0.02 N.m/g; the charring length and the flame-retardant time of the obtained flame-retardant paper are detected according to GB/T14656-2009, and the detected results are respectively 21mm and 0.8 s.
Example 2
The flame-retardant material comprises the following components in parts by weight:
65 parts of flame retardant, which is prepared by mixing 1250-mesh aluminum hydroxide and 800-mesh magnesium hydroxide according to the mass ratio of 1: 1;
14.7 parts of mixed fiber, which is obtained by mixing softwood fiber and ceramic fiber according to the mass ratio of 2: 1; the beating degree of the softwood fibers is 17 DEG SR;
12.8 parts of latex, namely styrene-butadiene latex;
0.15 part of flocculant, which is prepared by mixing polyaluminium chloride and cationic polyacrylamide according to the mass ratio of 1: 1;
0.15 part of wet strength agent which is polyamide epichlorohydrin resin;
0.05 part of defoaming agent and JF-05B type organic silicon defoaming agent.
The preparation method of the flame-retardant paper comprises the following steps:
the mixed fiber fluffing liquid is obtained by mixing and fluffing mixed fibers and water in a beater, and the mass concentration of the mixed fiber fluffing liquid is 1%;
diluting the latex to a mass concentration of 10 percent by taking water as a diluent, diluting the flocculant to a mass concentration of 1 percent, diluting the wet strength agent to a mass concentration of 1 percent, and diluting the defoaming agent to a mass concentration of 1 percent for later use;
adding the flame retardant and the diluted latex into a beater, defibering and mixing to obtain a first mixture;
stirring and uniformly mixing the obtained first mixture, the diluted flocculating agent, the diluted wet strength agent and the diluted defoaming agent to obtain a second mixture;
adding water to dilute the obtained second mixture until the solid content is 2% to obtain slurry;
and (3) feeding the obtained slurry to a fourdrinier paper machine for papermaking, wherein papermaking process parameters are as follows: the speed of the paper machine is 10m/min, the length of the screen table is 10m, the width is 600mm, an 80-mesh polyester screen is used, the pressure of a pressing section is 0.1MPa, and the drying temperature of a drying cylinder is 98 ℃, so that the flame retardant paper is obtained.
The obtained flame retardant paper is quantitatively detected according to GB/T451.2-2002, and the test result is 300.0 +/-10.0 g/m2(ii) a The thickness of the obtained flame retardant paper is tested according to GB/T451.3-2002, and the test result is 0.46 +/-0.02 mm; the tightness of the obtained flame-retardant paper was calculated according to the relationship of the tightness to the basis weight/thickness, and the calculation result was 0.65. + -. 0.05g/cm3(ii) a The tensile index of the obtained flame retardant paper is tested according to GB/T12914-2008, and the test result is 5.98 +/-0.02 N.m/g; the charring length and the flame-retardant time of the obtained flame-retardant paper are detected according to GB/T14656-2009, and the detected results are 29mm and 1.4s respectively.
It can be seen from the above examples that, compared with the conventional wet forming process for papermaking, the wear-resistant base paper provided by the invention has the advantages of high ash content (i.e. wear-resistant agent), uniform thickness and quantification, and high tensile strength and wet tensile strength. The preparation method provided by the invention is simple and easy and has low cost.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (9)

1. The flame-retardant paper is characterized by comprising the following components in parts by mass:
50-80 parts of a flame retardant;
6-25 parts of mixed fibers;
10-20 parts of latex;
0.1-0.3 part of a flocculating agent;
0.1-0.3 part of wet strength agent;
0.01-0.1 part of defoaming agent.
2. The flame retardant paper according to claim 1, wherein the flame retardant is one or more of aluminum hydroxide, magnesium aluminum hydrotalcite, zinc borate and antimony trioxide; the particle size of the flame retardant is 300-2000 meshes.
3. The flame retardant paper of claim 1 wherein said blended fibers comprise plant fibers and inorganic fibers; the mass ratio of the plant fibers to the inorganic fibers is 2: 1-4.
The mixed fiber is characterized in that the plant fiber is one or more of cotton fiber, hemp fiber, bamboo fiber, softwood fiber and hardwood fiber;
the inorganic fiber is one or more of asbestos, mineral wool, sepiolite fiber, ceramic fiber, glass fiber and glass wool fiber.
4. The flame retardant paper according to claim 1, wherein said latex is one or more of styrene-butadiene latex, acrylonitrile-butadiene latex, acrylic latex, carboxylated styrene-butadiene latex and carboxylated acrylonitrile-butadiene latex.
5. The flame retardant paper according to claim 1 wherein the flocculant is polyaluminium chloride and cationic polyacrylamide; the mass ratio of the polyaluminium chloride to the cationic polyacrylamide is (1-2) to 1.
6. The flame retardant paper according to claim 1, wherein said wet strength agent is one or more of a polyamide epichlorohydrin resin, a polyethyleneimine, a melamine formaldehyde resin and a urea formaldehyde resin.
7. The flame retardant paper according to claim 1, wherein the defoaming agent is a silicone-based defoaming agent.
8. The method for preparing the flame retardant paper as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
providing a mixed fiber enzymolysis solution;
mixing the mixed fiber degradation liquid, the flame retardant and the latex to obtain a first mixture;
mixing the first mixture, a flocculating agent, a wet strength agent and a defoaming agent to obtain a second mixture;
diluting the second mixture to obtain slurry;
and manufacturing the pulp to obtain the flame retardant paper.
9. The preparation method according to claim 8, wherein the mass concentration of the mixed fiber degradation liquid is 0.5-2%; the solid content of the slurry is 1.5-3%.
CN202010220730.8A 2020-03-24 2020-03-24 Flame-retardant paper and preparation method thereof Pending CN113445354A (en)

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Application publication date: 20210928