CN118166577A - Formula and production process of fire-retardant paper - Google Patents
Formula and production process of fire-retardant paper Download PDFInfo
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- CN118166577A CN118166577A CN202410485687.6A CN202410485687A CN118166577A CN 118166577 A CN118166577 A CN 118166577A CN 202410485687 A CN202410485687 A CN 202410485687A CN 118166577 A CN118166577 A CN 118166577A
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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
- 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
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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
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the 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
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
-
- 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
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/04—Physical treatment, e.g. heating, irradiating
- D21H25/06—Physical treatment, e.g. heating, irradiating of impregnated or coated paper
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Abstract
The invention discloses a formula of fireproof flame-retardant paper in the field of flame-retardant paper and a production process thereof, wherein raw materials comprise base paper and an impregnating composition, a layer of flame retardant a is coated on the surface of the base paper, a layer of flame retardant b is uniformly coated on the bottom surface of the base paper through a film coating machine, and the impregnating composition comprises the following raw materials in parts by number: the production process of the fireproof flame-retardant paper comprises the following steps of: step S1, raw paper molding, step S2, raw material preparation, step S3, primary impregnation, step S4, secondary impregnation, step S5, primary coating, step S6, secondary coating, and forming a carbonization layer on the surface of the raw paper, wherein the carbonization layer can isolate flame, can self-extinguish from fire, and can be applied to the fields of new energy, aviation, aerospace, military ammunition, firework firecracker, electronics, electric appliances, chemical industry, chemistry, auto-parts products and the like.
Description
Technical Field
The invention relates to the technical field of flame-retardant paper, in particular to a formula of flame-retardant paper and a production process thereof.
Background
The paper-based material has inflammability, in order to meet the requirements of specific places, flame retardant treatment is necessary to be carried out on the paper-based material, and the addition of the flame retardant is a main way for improving the flame retardant property of the paper, and the flame retardant is various in variety, wherein the inorganic flame retardant has the characteristics of low smoke, low toxicity, good thermal stability, lasting effect and the like, and has been rapidly developed in recent years;
At present, two methods for adding an inorganic flame retardant into flame-retardant paper mainly exist, namely, a coating method is adopted, the consumption of the flame retardant is low, the influence on the physical properties of paper is small, but the flame retardance in the paper cannot be given, the flame retardant effect is not ideal, and the method is adopted, so that the paper is manufactured simply, the flame retardant is uniformly distributed, but the loss of the flame retardant is serious, the defect of poor flame retardance is commonly caused, the flame retardant cannot be extinguished immediately after the flame is released, and the phenomenon of dripping exists after the flame is ignited, so that the flame-retardant paper has poor use effect in the fields of new energy, aviation, aerospace, military ammunition, fireworks and crackers, electronics, electrical appliances, chemical industry, auto-parts products and the like;
In addition, the existing flame retardant paper production process is generally only to coat a layer of flame retardant on the upper and lower sides of the base paper, and then dry the base paper, so that the base paper does not have flame retardant property, and in the long-time use process, the flame retardant on the outer layer of the base paper can be subjected to external environmental factors to weaken the flame retardant property.
Disclosure of Invention
In order to overcome the defects of the prior art, the formula and the production process of the fireproof flame-retardant paper can effectively solve the defects that the flame-retardant paper is generally poor in flame retardant performance due to the adoption of a coating method or an internal slurry adding method in the prior flame-retardant paper, can not be extinguished immediately after being ignited, can drop off after being ignited, and have poor use effects in the fields of new energy, aviation, aerospace, military ammunition, firework, firecrackers, electronics, electric appliances, chemical industry, automobile accessory products and the like.
The technical scheme adopted for solving the technical problems is as follows: the fireproof flame-retardant paper comprises raw materials of base paper and an impregnating composition, wherein the surface of the base paper is uniformly coated with a layer of flame retardant a through a film coating machine, and the flame retardant a comprises the following raw materials in parts by weight: 30-40 parts of starch phosphate melamine salt, 5-10 parts of tea saponin, 1-3 parts of polylactic acid, 3-10 parts of vinyl silicone resin, 10-18 parts of antimonous oxide, 5-7 parts of sodium antimonide, 2-3 parts of phosphate, 2-3 parts of guar gum and 7-9 parts of polycaprolactone, wherein a layer of flame retardant b is uniformly coated on the bottom surface of base paper through a film coating machine, and the flame retardant b comprises the following raw materials in parts by weight: 38-50 parts of starch phosphate melamine salt, 6-9 parts of tea saponin, 1-3 parts of polylactic acid, 2-8 parts of vinyl silicone resin, 18-24 parts of antimonous oxide, 5-7 parts of sodium antimonide, 2-3 parts of phosphate, 2-3 parts of guar gum and 7-9 parts of polycaprolactone, wherein the impregnating composition comprises the following raw materials in parts by weight: 0.8-1.5 parts of composite heat stabilizer, 6-12 parts of mannitol, 2-3 parts of activated carbon, 4-12 parts of polyether diamine, 80-120 parts of dicyandiamide, 10-30 parts of isocyanate, 5-10 parts of isocyanate and 6-12 parts of polycarbodiimide.
Preferably, the flame retardant a further comprises 50-60 parts by weight of graphene containing DOPO groups and 5-10 parts by weight of dispersing agent, wherein the dispersing agent is a mixture of acrylamide sulfonate and carboxylate, the graphene containing DOPO groups is formed by grafting 1 or more DOPO groups on the surface of graphene, and the particle size of the graphene containing DOPO groups is smaller than 200 meshes.
Preferably, the flame retardant b further comprises 60-80 parts by weight of graphene containing DOPO groups and 8-10 parts by weight of dispersing agent, wherein the dispersing agent is a mixture of acrylamide sulfonate and carboxylate, the graphene containing DOPO groups is formed by grafting 1 or more DOPO groups on the surface of graphene, and the particle size of the graphene containing DOPO groups is smaller than 300 meshes.
Preferably, the impregnating composition further comprises 2-10 parts by weight of a composite flame retardant and 20-30 parts by weight of a composite fire retardant, wherein the composite flame retardant is a mixture of tricresyl phosphate, pentaerythritol, sodium silicate, urea-formaldehyde resin, ammonium phosphate and calcium bicarbonate powder, and the composite fire retardant is a mixture of antimony dioxide, fire suppressant, oxalic acid, nano kaolinite, diatomite, dimethyl terephthalate, aluminum hydroxide and water-sliding powder.
Preferably, the polycarbodiimide contains a hydrophilic segment in a molecular structure, and the average degree of polymerization of the polycarbodiimide is 3.2 or more.
Preferably, the base paper is formed by squeezing and drying modified plant fibers obtained by modifying the plant fibers in a flame-retardant way by adopting a molecular self-assembly method.
A production process of fireproof flame-retardant paper comprises the following steps:
Step S1, forming base paper, step S2, preparing raw materials, step S3, primary impregnation, step S4, secondary impregnation, step S5, primary coating, step S6 and secondary coating;
Wherein the step S1: the modified plant fiber after flame retardant modification is pressed, dried and molded to obtain base paper by adopting a molecular self-assembly method, wherein the step S2 is as follows: the impregnating composition, the flame retardant a and the flame retardant b are prepared according to the weight part configuration of each component in the fireproof flame retardant paper according to any one of claims 1 to 5, wherein the step S3 is as follows: heating the impregnating composition to 150-200 ℃, putting the base paper into the impregnating composition for primary impregnation, and drying the base paper after 2-3h of impregnation, wherein in the step S4: the base paper is subjected to a second impregnation in an impregnating composition, wherein step S5 is described above: uniformly coating a layer of flame retardant a on the surface of the base paper by a film coating machine, and drying, wherein in the step S6: and uniformly coating a layer of flame retardant b on the bottom surface of the base paper by a film coating machine, and then drying.
Preferably, in the step S4, the composition to be impregnated is cooled to 80-100 ℃, the base paper is placed in the composition to be impregnated for the second time, the temperature of the composition to be impregnated is raised to 120 ℃ after 1-2 hours, the base paper is dried after continuous soaking for 0.5-1 hour, and then a layer of adhesive layer is coated on the upper surface and the lower surface of the base paper.
Preferably, in the step S1, the plant fiber for paper making is uniformly dispersed into a slurry state by using a fiber dissociator, the metal salt and the pH adjuster are completely dissolved in water to be used as a reaction liquid, the paper pulp is immersed in the reaction liquid, the paper fiber is uniformly dispersed in the reaction liquid by stirring, the mixture is transferred into a high-pressure reaction kettle, and is kept stand for 12-24 hours, and then the paper pulp suspension is placed on a former to be made into paper, and the base paper is obtained after the paper is pressed and dried.
Preferably, after the pulp is immersed in the reaction liquid, a water-soluble flame retardant and a stabilizer are added thereto and preliminary stirring is performed, and the reaction liquid is slowly warmed up to 80-100 ℃.
Compared with the prior art, the invention has the beneficial effects that:
1. The base paper is endowed with flame retardant property in a dipping way, the dipping composition comprises a composite heat stabilizer, mannitol, activated carbon, polyether diamine, dicyandiamide, isocyanate and polycarbodiimide, the synergistic effect of the isocyanate, the polyether diamine and the dicyandiamide can provide high-temperature resistant flame retardant property for the base paper, the composite heat stabilizer has flame retardant and smoke suppression effects, and a layer of flame retardant a is uniformly coated on the surface of the base paper, the flame retardant a comprises starch phosphate melamine salt, tea saponin, polylactic acid, vinyl silicone resin, antimony trioxide, sodium antimonide, phosphate, guar gum and polycaprolactone, a layer of flame retardant b is uniformly coated on the bottom surface of the base paper, the flame retardant b comprises starch phosphate melamine salt, tea saponin, polylactic acid, vinyl silicone resin, antimony trioxide, sodium antimonide, phosphate, guar gum and polycaprolactone, and the flame retardant a and the flame retardant b are added with the antimony trioxide and sodium antimonide, so that a carbonization layer is formed on the surface of the base paper after being dried, and the carbonization layer can flame and be separated from fire;
2. In the manufacturing process of the base paper in the step S1, the base paper is formed by squeezing and drying the modified plant fiber after flame retardation modification of the plant fiber by adopting a molecular self-assembly method, so that the flame retardation of the flame retardation paper can be further improved, and the modified plant fiber can have stronger flame retardation through the primary impregnation and the secondary impregnation in the step S3 and the step S4, and can be applied to the fields of new energy, aviation, aerospace, military ammunition, fireworks and crackers, electronics, electrical appliances, chemical industry, chemistry, auto parts and the like.
Drawings
FIG. 1 is a flow chart of the formulation and production process of the fire-retardant paper of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides fireproof flame-retardant paper, which comprises raw materials of base paper and an impregnating composition, wherein the base paper is formed by squeezing and drying modified plant fibers obtained by carrying out flame-retardant modification on the plant fibers by adopting a molecular self-assembly method, the surface of the base paper is uniformly coated with a layer of flame retardant a by a film coating machine, and the flame retardant a comprises the following raw materials in parts by weight: 30-40 parts of starch phosphate melamine salt, 5-10 parts of tea saponin, 1-3 parts of polylactic acid, 3-10 parts of vinyl silicone resin, 10-18 parts of antimonous oxide, 5-7 parts of sodium antimonide, 2-3 parts of phosphate, 2-3 parts of guar gum and 7-9 parts of polycaprolactone, 50-60 parts of graphene containing DOPO groups and 5-10 parts of dispersing agent, wherein the dispersing agent is a mixture of acrylamide sulfonate and carboxylate, the graphene containing DOPO groups is prepared by grafting 1 or more DOPO groups on the surface of graphene, the particle size of the graphene containing DOPO groups is smaller than 200 meshes, the bottom surface of base paper is uniformly coated with a layer of flame retardant b through a film coating machine, and the flame retardant b comprises the following raw materials in parts by weight: 38-50 parts of starch phosphate melamine salt, 6-9 parts of tea saponin, 1-3 parts of polylactic acid, 2-8 parts of vinyl silicone resin, 18-24 parts of antimonous oxide, 5-7 parts of sodium antimonide, 2-3 parts of phosphate, 2-3 parts of guar gum and 7-9 parts of polycaprolactone, 60-80 parts of graphene containing DOPO groups and 8-10 parts of dispersing agent, wherein the dispersing agent is a mixture of acrylamide sulfonate and carboxylate, the graphene containing DOPO groups is prepared by grafting 1 or more DOPO groups on the surface of graphene, the particle size of the graphene containing DOPO groups is smaller than 300 meshes, and the impregnating composition comprises the following raw materials in parts by weight: the impregnating composition further comprises 2-10 parts by weight of a composite flame retardant and 20-30 parts by weight of a composite fire retardant, wherein the composite flame retardant is a mixture of tricresyl phosphate, pentaerythritol, sodium silicate, urea formaldehyde resin, ammonium phosphate and calcium bicarbonate powder, the composite fire retardant is a mixture of antimony dioxide, fire suppressant, oxalic acid, nano kaolinite, diatomite, terephthalyl ester, aluminum hydroxide and water-skiing powder, the polycarbodiimide contains hydrophilic chain segments in a molecular structure, and the average polymerization degree of the polycarbodiimide is more than 3.2.
As shown in fig. 1, a production process of the fireproof flame-retardant paper comprises the following steps:
Step S1, forming base paper, step S2, preparing raw materials, step S3, primary impregnation, step S4, secondary impregnation, step S5, primary coating, step S6 and secondary coating;
Wherein the step S1: the method comprises the steps of uniformly dispersing plant fibers for papermaking into slurry by a fiber dissociator, taking metal salt and a pH regulator to be completely dissolved in water to be used as reaction liquid, immersing paper pulp in the reaction liquid, adding a water-soluble flame retardant and a stabilizer into the reaction liquid after the paper pulp is immersed in the reaction liquid, carrying out primary stirring, slowly heating the reaction liquid to 80-100 ℃, uniformly dispersing the paper fibers in the reaction liquid by stirring, transferring the mixture into a high-pressure reaction kettle, standing for 12-24h, then placing the paper pulp suspension on a former for papermaking, and carrying out press drying to obtain the base paper, wherein the step S2: preparing an impregnating composition, a flame retardant a and a flame retardant b according to the weight parts of the components, wherein in the step S3: heating the impregnating composition to 150-200 ℃, putting the base paper into the impregnating composition for primary impregnation, and drying the base paper after 2-3h of impregnation, wherein in the step S4: the base paper is placed in the dipping composition for the second dipping, the dipping composition is cooled to 80-100 ℃, the base paper is placed in the dipping composition for the second dipping, the dipping composition is heated to 120 ℃ after dipping for 1-2h, the base paper is dried after continuously dipping for 0.5-1 h, and then a layer of adhesive layer is coated on the upper surface and the lower surface of the base paper, wherein the step S5 is as follows: uniformly coating a layer of flame retardant a on the surface of the base paper by a film coating machine, and drying, wherein in the step S6: and uniformly coating a layer of flame retardant b on the bottom surface of the base paper by a film coating machine, and then drying.
Table 1 shows the test results of vertical burning of the fire-retardant paper:
Table 1 table 2 shows the determination conditions:
Table 2 table 3 shows the test results of the fire-retardant paper:
| Sequence number | Test item | Test method | Results | Conclusion(s) |
| 1 | Vertical combustion | UL94-2023 section 8 | V-0 | Qualified product |
TABLE 3 Table 3
Compared with the traditional technology:
1. The base paper is endowed with flame retardant property in a dipping way, the dipping composition comprises a composite heat stabilizer, mannitol, activated carbon, polyether diamine, dicyandiamide, isocyanate and polycarbodiimide, the synergistic effect of the isocyanate, the polyether diamine and the dicyandiamide can provide high-temperature resistant flame retardant property for the base paper, the composite heat stabilizer has flame retardant and smoke suppression effects, and a layer of flame retardant a is uniformly coated on the surface of the base paper, the flame retardant a comprises starch phosphate melamine salt, tea saponin, polylactic acid, vinyl silicone resin, antimony trioxide, sodium antimonide, phosphate, guar gum and polycaprolactone, a layer of flame retardant b is uniformly coated on the bottom surface of the base paper, the flame retardant b comprises starch phosphate melamine salt, tea saponin, polylactic acid, vinyl silicone resin, antimony trioxide, sodium antimonide, phosphate, guar gum and polycaprolactone, and the flame retardant a and the flame retardant b are added with the antimony trioxide and sodium antimonide, so that a carbonization layer is formed on the surface of the base paper after being dried, and the carbonization layer can flame and be separated from fire;
2. In the manufacturing process of the base paper in the step S1, the base paper is formed by squeezing and drying the modified plant fiber after flame retardation modification of the plant fiber by adopting a molecular self-assembly method, so that the flame retardation of the flame retardation paper can be further improved, the modified plant fiber can have stronger flame retardation through the primary impregnation and the secondary impregnation in the step S3 and the step S4, the base paper can be applied to the fields of new energy, aviation, aerospace, military ammunition, fireworks and crackers, electronics, electrical appliances, chemical industry, chemistry, automobile accessory products and the like, and no sewage is generated in the production process.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410485687.6A CN118166577A (en) | 2024-04-22 | 2024-04-22 | Formula and production process of fire-retardant paper |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102704327A (en) * | 2012-06-25 | 2012-10-03 | 湖南工业大学 | Method for preparing LDHs flame retardant paper |
| CN104086961A (en) * | 2014-07-01 | 2014-10-08 | 南京理工大学 | Flame-retardant heat-resistant reinforced polylactic acid composition and preparation method thereof |
| CN104775327A (en) * | 2014-01-15 | 2015-07-15 | 天津市佩森木业有限公司 | Flame retardant impregnated paper |
| CN106182276A (en) * | 2016-08-05 | 2016-12-07 | 东莞市道尔化工有限公司 | Novel timber fire-proof flame-retarded agent and preparation method thereof |
| CN107163655A (en) * | 2017-06-26 | 2017-09-15 | 东莞市道尔新材料科技有限公司 | DOPO base expanding fire retardants |
| CN109561742A (en) * | 2016-12-19 | 2019-04-02 | 绿安全股份有限公司 | Gloves dip composition, the manufacturing method of gloves and gloves |
| CN114032706A (en) * | 2021-11-18 | 2022-02-11 | 杭州中润华源装饰材料有限公司 | Heat-resistant flame-retardant decorative paper and preparation method thereof |
-
2024
- 2024-04-22 CN CN202410485687.6A patent/CN118166577A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102704327A (en) * | 2012-06-25 | 2012-10-03 | 湖南工业大学 | Method for preparing LDHs flame retardant paper |
| CN104775327A (en) * | 2014-01-15 | 2015-07-15 | 天津市佩森木业有限公司 | Flame retardant impregnated paper |
| CN104086961A (en) * | 2014-07-01 | 2014-10-08 | 南京理工大学 | Flame-retardant heat-resistant reinforced polylactic acid composition and preparation method thereof |
| CN106182276A (en) * | 2016-08-05 | 2016-12-07 | 东莞市道尔化工有限公司 | Novel timber fire-proof flame-retarded agent and preparation method thereof |
| CN109561742A (en) * | 2016-12-19 | 2019-04-02 | 绿安全股份有限公司 | Gloves dip composition, the manufacturing method of gloves and gloves |
| CN107163655A (en) * | 2017-06-26 | 2017-09-15 | 东莞市道尔新材料科技有限公司 | DOPO base expanding fire retardants |
| CN114032706A (en) * | 2021-11-18 | 2022-02-11 | 杭州中润华源装饰材料有限公司 | Heat-resistant flame-retardant decorative paper and preparation method thereof |
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