阅读说明：本技术 一种防火板芯纸配方及其生产工艺 (Formula and production process of fireproof core paper ) 是由 亓树山 黄金涛 马宗川 于 2021-01-29 设计创作，主要内容包括：本发明公开了一种防火板芯纸配方及其生产工艺,包括芯纸层、浸胶层,芯纸层由表层、防火骨架层、里层层、树脂层组成,浸胶层为防火胶,表层由玻璃纤维、针叶材、醋酯纤维、消泡剂、分散剂、增白剂组成,里层由针叶材、聚酰亚胺、消泡剂、分散剂、增白剂组成,骨架层由铝丝组成,防火骨架层设置在表层、里层之间且通过压缩工艺、干燥工艺一体成型,防火骨架层由铜丝、石棉粉、增强剂组成,树脂层附着在表层、里层的外表面,防火胶浸渗芯纸层,本发明实现了具有良好的刚性,防止芯纸受热变形损坏,简化加工工序,提高芯纸耐火阻燃性能的功能。(The invention discloses a formula of fireproof board core paper and a production process thereof, wherein the fireproof board core paper comprises a core paper layer and a gum dipping layer, the core paper layer consists of a surface layer, a fireproof framework layer, an inner layer and a resin layer, the gum dipping layer is made of fireproof glue, the surface layer consists of glass fiber, needle leaf materials, acetate fiber, a defoaming agent, a dispersing agent and a whitening agent, the inner layer consists of needle leaf materials, polyimide, a defoaming agent, a dispersing agent and a whitening agent, the framework layer consists of aluminum wires, the fireproof framework layer is arranged between the surface layer and the inner layer and is integrally formed through a compression process and a drying process, the fireproof framework layer consists of copper wires, asbestos powder and a reinforcing agent, the resin layer is attached to the outer surfaces of the surface layer and the inner layer, and the fireproof glue impregnates the core paper layer.)

1. The formula of the fireproof core paper is characterized in that: the fireproof core paper comprises a core paper layer and a glue dipping layer, wherein the core paper layer consists of a surface layer, a fireproof framework layer, an inner layer and a resin layer, the glue dipping layer is made of fireproof glue, the surface layer consists of glass fibers, needle-leaf materials, acetate fibers, defoaming agents, dispersing agents and whitening agents, the inner layer consists of needle-leaf materials, polyimide, defoaming agents, dispersing agents and whitening agents, the framework layer consists of aluminum wires, the fireproof framework layer is arranged between the surface layer and the inner layer and integrally formed through a compression process and a drying process, the fireproof framework layer consists of copper wires, asbestos powder and reinforcing agents, the resin layer is attached to the outer surfaces of the surface layer and the inner layer, and the fireproof glue impregnates the core paper layer.

2. The fire retardant coreboard paper formulation according to claim 1, wherein: the surface layer comprises, by mass, 20-25% of glass fiber, 35-50% of needle leaf material, 20-30% of acetate fiber, 1.5-3% of defoaming agent, 1.5-3% of dispersing agent and 0.8-4% of whitening agent.

3. The fire retardant coreboard paper formulation according to claim 1, wherein: the inner layer comprises 55-70% of needle leaf material, 20-40% of polyimide, 1.5-3% of defoaming agent, 1.5-3% of dispersing agent and 0.8-4% of whitening agent by mass percent.

4. The fire retardant coreboard paper formulation according to claim 1, wherein: the fireproof framework layer comprises, by mass, 10-20% of a copper wire, 45-60% of asbestos powder and 35-50% of a reinforcing agent, wherein the diameter of the copper wire is 0.035-0.04 mm.

5. The fire retardant coreboard paper formulation according to claim 1, wherein: and after the fireproof glue infiltrates the core paper layer, a glue dipping layer with the thickness of 0.5 mm-0.6 mm is covered on the surfaces of the core paper layer and the resin layer.

6. The fire retardant coreboard paper formulation according to claim 1, wherein: the resin layer component is water-soluble resin emulsion.

7. The process for producing a fire retardant coreboard paper, according to claim 1, comprising the steps of:

(1) mixing glass fiber, needle-leaved wood and acetate fiber, pulping, wherein the concentration of the pulp is 2.5-3.0 wt%, centrifuging the pulp in a centrifugal tank, stirring for 10min, and then grinding until the beating degree is 20-22 DEG SR;

(2) adding a defoaming agent, a dispersing agent and a whitening agent into the material obtained in the previous step, stirring uniformly, continuously stirring to 2.0-2.4 wt%, and performing web-feeding and papermaking forming to obtain surface layer blank paper;

(3) mixing needle leaves and polyimide, pulping until the concentration of the pulp is 2.6-2.9%, pulping until the beating degree of the pulp is 16.5-16.9 DEG SR, and then pulping until the beating degree is 28-28.5 DEG SR;

(4) adding a defoaming agent, a dispersing agent, a waterproof agent and a whitening agent into the material obtained in the last step, stirring uniformly, continuously stirring until the weight is 1.35-1.6 wt%, and performing web-feeding and papermaking forming to obtain inner-layer blank paper;

(5) putting copper wires, asbestos powder and reinforcing agent into a stirrer, stirring for 15h, taking out, spreading the inner layer blank paper, uniformly coating the stirred mixture on the inner layer blank paper, covering the inner layer blank paper with the surface layer blank paper, then sending the inner layer blank paper into a compression device for compression, and then drying and forming;

(6) spraying water-soluble resin emulsion diluted by 10-13% of water on the surface of the material obtained in the last step, and drying after uniform spraying;

(7) and (3) dipping the material obtained in the last step for 1h to enable the fireproof glue to infiltrate the core paper layer to form a dipped layer with the thickness of 0.5-0.6 mm, placing the dipped layer in an environment with the temperature of 76-80 ℃, and drying for more than 1h for shaping to obtain the fireproof board core paper.

8. The production process of the fire-proof board core paper according to claim 1, characterized in that: the thickness of the surface layer is 0.3 mm-0.37 mm.

9. The production process of the fire-proof board core paper according to claim 1, characterized in that: the thickness of the inner layer is 0.2 mm-0.24 mm.

10. The production process of the fire-proof board core paper according to claim 1, characterized in that: the total thickness of the core paper layer is 0.8 mm-1.2 mm.

Technical Field

The invention relates to the technical field of fireproof core paper, in particular to a formula and a production process of fireproof core paper.

Background

The fireproof board core paper is a necessary component of a fireproof board, most of the fireproof board core paper in the prior art has certain defects, such as poor fireproof performance, and is bound to contend in minutes and seconds under fire conditions, the continuous burning time of the common fireproof board core paper is between 4.5s and 6s, the burning time is between 50s and 57s, the time is short, at present, part of the common fireproof board core paper on the market can be deformed by heating when the fire conditions exist, and the common fireproof board core paper is damaged by cracking and the like before being unburnt.

Therefore, the fire-proof board core paper with good rigidity, which can prevent the core paper from deforming under heat, simplify the processing procedure and improve the fire-proof and fire-retardant performance of the core paper and the production process thereof are the problems to be solved by the inventor.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a formula of fire-proof board core paper and a production process thereof, which can realize the functions of good rigidity, prevention of the core paper from being deformed by heating, simplification of the processing procedure and improvement of the fire-proof and fire-retardant performance of the core paper.

The technical scheme adopted by the invention for solving the technical problems is as follows: the core paper layer consists of a surface layer, a fireproof framework layer, an inner layer and a resin layer, the gum dipping layer is made of fireproof glue, the surface layer consists of glass fibers, needle-shaped materials, acetate fibers, defoaming agents, dispersing agents and whitening agents, the inner layer consists of needle-shaped materials, polyimide, defoaming agents, dispersing agents and whitening agents, the framework layer consists of aluminum wires, the fireproof framework layer is arranged between the surface layer and the inner layer and integrally formed through a compression process and a drying process, the fireproof framework layer consists of copper wires, asbestos powder and reinforcing agents, the resin layer is attached to the outer surfaces of the surface layer and the inner layer, and the core paper layer is impregnated with the fireproof glue.

Furthermore, the surface layer comprises, by mass, 20-25% of glass fibers, 35-50% of needle leaves, 20-30% of acetate fibers, 1.5-3% of a defoaming agent, 1.5-3% of a dispersing agent and 0.8-4% of a whitening agent.

Furthermore, the inner layer comprises 55-70% of needle leaf material, 20-40% of polyimide, 1.5-3% of defoaming agent, 1.5-3% of dispersing agent and 0.8-4% of whitening agent by mass percent.

Furthermore, the fireproof framework layer comprises, by mass, 10% -20% of a copper wire, 45% -60% of asbestos powder and 35% -50% of a reinforcing agent, wherein the diameter of the copper wire is 0.035-0.04 mm.

Further, a glue dipping layer with the thickness of 0.5 mm-0.6 mm is covered on the surfaces of the core paper layer and the resin layer after the fireproof glue is impregnated into the core paper layer.

Further, the resin layer component is a water-soluble resin emulsion.

A production process of fireproof core paper comprises the following steps:

(1) mixing glass fiber, needle-leaved wood and acetate fiber, pulping, wherein the concentration of the pulp is 2.5-3.0 wt%, centrifuging the pulp in a centrifugal tank, stirring for 10min, and then grinding until the beating degree is 20-22 DEG SR;

(2) adding a defoaming agent, a dispersing agent and a whitening agent into the material obtained in the previous step, stirring uniformly, continuously stirring to 2.0-2.4 wt%, and performing web-feeding and papermaking forming to obtain surface layer blank paper;

(3) mixing needle leaves and polyimide, pulping until the concentration of the pulp is 2.6-2.9%, pulping until the beating degree of the pulp is 16.5-16.9 DEG SR, and then pulping until the beating degree is 28-28.5 DEG SR;

(4) adding a defoaming agent, a dispersing agent, a waterproof agent and a whitening agent into the material obtained in the last step, stirring uniformly, continuously stirring until the weight is 1.35-1.6 wt%, and performing web-feeding and papermaking forming to obtain inner-layer blank paper;

(5) putting copper wires, asbestos powder and reinforcing agent into a stirrer, stirring for 15h, taking out, spreading the inner layer blank paper, uniformly coating the stirred mixture on the inner layer blank paper, covering the inner layer blank paper with the surface layer blank paper, then sending the inner layer blank paper into a compression device for compression, and then drying and forming;

(6) spraying water-soluble resin emulsion diluted by 10-13% of water on the surface of the material obtained in the last step, and drying after uniform spraying;

(7) and (3) dipping the material obtained in the last step for 1h to enable the fireproof glue to infiltrate the core paper layer to form a dipped layer with the thickness of 0.5-0.6 mm, placing the dipped layer in an environment with the temperature of 76-80 ℃, and drying for more than 1h for shaping to obtain the fireproof board core paper.

Further, the thickness of the surface layer is 0.3mm to 0.37 mm.

Further, the thickness of the inner layer is 0.2 mm-0.24 mm.

Further, the total thickness of the core paper layer is 0.8 mm-1.2 mm.

The invention has the beneficial effects that:

1. the fireproof core paper adopts a multilayer composite structure, the middle part is supplemented with metal wires with fine diameters, asbestos powder and a reinforcing grade which are mixed to serve as a fireproof framework layer, the integral rigidity is improved, the fireproof core paper is not easy to deform and cannot be broken before unburnt, meanwhile, the surface is uniformly sprayed with water-soluble resin emulsion to improve the fireproof performance, the inner layer adopts polyimide, the fireproof core paper has the excellent performance of resisting high temperature of more than 400 ℃, the core paper is dipped with a 0.6mm glue layer, and multiple fireproof measures are taken, so that the fireproof performance of the core paper is greatly improved, the core paper cannot be easily torn due to external force, the core paper has good rigidity, the core paper is prevented from being deformed and damaged due to heating, the.

Detailed Description

The invention will now be further illustrated by reference to specific examples, which are intended to be illustrative only and not to limit the scope of the invention. Further, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and such equivalents may fall within the scope of the invention as defined in the appended claims.

A formula of core paper of a fireproof board comprises a core paper layer and a gum dipping layer, wherein the core paper layer consists of a surface layer, a fireproof framework layer, an inner layer and a resin layer, the gum dipping layer is made of fireproof glue, the surface layer consists of glass fibers, needle leaf materials, acetate fibers, defoaming agents, dispersing agents and whitening agents, the inner layer consists of the needle leaf materials, polyimide, the defoaming agents, the dispersing agents and the whitening agents, the framework layer consists of aluminum wires, the fireproof framework layer is arranged between the surface layer and the inner layer and integrally formed through a compression process and a drying process, the fireproof framework layer consists of copper wires, asbestos powder and reinforcing agents, the resin layer is attached to the outer surfaces of the surface layer and the inner layer, and the fireproof glue impregnates the core paper layer.

The first embodiment is as follows:

the surface layer comprises 25% of glass fiber, 50% of needle leaf material, 20% of acetate fiber, 1.5% of defoaming agent, 1.5% of dispersing agent and 0.8% of whitening agent.

The inner layer comprises 65% of needle leaf material, 35% of polyimide, 2% of defoaming agent, 2% of dispersing agent and 3.2% of whitening agent.

The fireproof framework layer comprises 10% of copper wire, 50% of asbestos powder and 30% of reinforcing agent, and the diameter of the copper wire is 0.035 mm.

And after the fireproof glue infiltrates the core paper layer, covering a glue-impregnated layer with the thickness of 0.6mm on the surfaces of the core paper layer and the resin layer.

The resin layer component is water-soluble resin emulsion.

A production process of fireproof core paper comprises the following steps:

(1) mixing glass fiber, needle-leaved wood and acetate fiber, pulping, wherein the concentration of the pulp is 3.0wt%, centrifuging the pulp in a centrifugal tank, stirring for 10min, and pulping until the beating degree is 22 DEG SR;

(2) adding a defoaming agent, a dispersing agent and a whitening agent into the material obtained in the last step, stirring uniformly, continuously stirring to 2.4wt%, and performing web-feeding, papermaking and forming to obtain a surface layer blank paper;

(3) mixing needle-leaf materials and polyimide, pulping until the concentration of the pulp is 2.9 percent, pulping until the beating degree of the pulp is 16.9 DEG SR, and then pulping until the beating degree is 28.5 DEG SR;

(4) adding a defoaming agent, a dispersing agent, a waterproof agent and a whitening agent into the material obtained in the last step, stirring uniformly, continuously stirring to 1.6wt%, and performing web-feeding papermaking forming to obtain inner-layer blank paper;

(5) putting copper wires, asbestos powder and reinforcing agent into a stirrer, stirring for 15h, taking out, spreading the inner layer blank paper, uniformly coating the stirred mixture on the inner layer blank paper, covering the inner layer blank paper with the surface layer blank paper, then sending the inner layer blank paper into a compression device for compression, and then drying and forming;

(6) spraying water-soluble resin emulsion diluted by 13% of water on the surface of the material obtained in the last step, and drying after uniform spraying;

(7) and (3) dipping the material obtained in the last step for 1h to enable the fireproof glue to infiltrate the core paper layer to form a glue dipping layer with the thickness of 0.6mm, placing the glue dipping layer in an environment with the temperature of 80 ℃, drying for more than 1h and shaping to obtain the fireproof board core paper.

The thickness of the skin layer was 0.37 mm.

The thickness of the inner layer is 0.24 mm.

The total thickness of the core paper layer is 1.2 mm.

Example two:

the surface layer comprises 20% of glass fiber, 35% of needle leaf material, 30% of acetate fiber, 1.5% of defoaming agent, 1.5% of dispersing agent and 0.8% of whitening agent.

The inner layer comprises 55% of needle leaf material, 22% of polyimide, 1.5% of defoaming agent, 1.5% of dispersing agent and 0.8% of whitening agent.

The fireproof framework layer comprises 15% of copper wires, 45% of asbestos powder and 30% of reinforcing agent, and the diameter of the copper wires is 0.035 mm.

And after the fireproof glue infiltrates the core paper layer, covering a glue-impregnated layer with the thickness of 0.6mm on the surfaces of the core paper layer and the resin layer.

The resin layer component is water-soluble resin emulsion.

A production process of fireproof core paper comprises the following steps:

(1) mixing glass fiber, needle-leaved wood and acetate fiber, pulping, wherein the concentration of the pulp is 2.8wt%, centrifuging the pulp in a centrifugal tank, stirring for 10min, and grinding until the beating degree is 21 DEG SR;

(2) adding a defoaming agent, a dispersing agent and a whitening agent into the material obtained in the last step, stirring uniformly, continuously stirring to 2.3wt%, and performing web-feeding, papermaking and forming to obtain a surface layer blank paper;

(3) mixing needle-leaf materials and polyimide, pulping until the concentration of the pulp is 2.6 percent, pulping until the beating degree of the pulp is 16.5 DEG SR, and then pulping until the beating degree is 28.3 DEG SR;

(4) adding a defoaming agent, a dispersing agent, a waterproof agent and a whitening agent into the material obtained in the last step, stirring uniformly, continuously stirring to 1.5wt%, and performing web-feeding papermaking forming to obtain inner-layer blank paper;

(5) putting copper wires, asbestos powder and reinforcing agent into a stirrer, stirring for 15h, taking out, spreading the inner layer blank paper, uniformly coating the stirred mixture on the inner layer blank paper, covering the inner layer blank paper with the surface layer blank paper, then sending the inner layer blank paper into a compression device for compression, and then drying and forming;

(6) spraying water-soluble resin emulsion diluted by 12% of water on the surface of the material obtained in the last step, and drying after uniform spraying;

(7) and (3) dipping the material obtained in the last step for 1h to enable the fireproof glue to infiltrate the core paper layer to form a glue dipping layer with the thickness of 0.6mm, placing the glue dipping layer in an environment with the temperature of 79 ℃, drying for more than 1h and shaping to obtain the fireproof board core paper.

The thickness of the skin layer was 0.35 mm.

The thickness of the inner layer is 0.22 mm.

The total thickness of the core paper layer is 1.0 mm.

Example three:

the surface layer comprises 23% of glass fiber, 42% of needle leaf material, 25% of acetate fiber, 3% of defoaming agent, 3% of dispersing agent and 2% of whitening agent.

The inner layer comprises 62% of needle leaf material, 32% of polyimide, 3% of defoaming agent, 3% of dispersing agent and 2% of whitening agent.

The fireproof framework layer comprises 20% of copper wire, 45% of asbestos powder and 35% of reinforcing agent, and the diameter of the copper wire is 0.035 mm.

And after the fireproof glue infiltrates the core paper layer, covering a glue-impregnated layer with the thickness of 0.6mm on the surfaces of the core paper layer and the resin layer.

The resin layer component is water-soluble resin emulsion.

A production process of fireproof core paper comprises the following steps:

(1) mixing glass fiber, needle-leaved wood and acetate fiber, pulping, wherein the concentration of the pulp is 2.7wt%, centrifuging the pulp in a centrifugal tank, stirring for 10min, and pulping until the beating degree is 20 DEG SR;

(2) adding a defoaming agent, a dispersing agent and a whitening agent into the material obtained in the last step, stirring uniformly, continuously stirring to 2.3wt%, and performing web-feeding, papermaking and forming to obtain a surface layer blank paper;

(3) mixing needle-leaf materials and polyimide, pulping until the concentration of the pulp is 2.1 percent, pulping until the beating degree of the pulp is 16.0 DEG SR, and then pulping until the beating degree is 28.2 DEG SR;

(4) adding a defoaming agent, a dispersing agent, a waterproof agent and a whitening agent into the material obtained in the last step, stirring uniformly, continuously stirring to 1.55wt%, and performing web-feeding papermaking forming to obtain inner-layer blank paper;

(5) putting copper wires, asbestos powder and reinforcing agent into a stirrer, stirring for 15h, taking out, spreading the inner layer blank paper, uniformly coating the stirred mixture on the inner layer blank paper, covering the inner layer blank paper with the surface layer blank paper, then sending the inner layer blank paper into a compression device for compression, and then drying and forming;

(6) spraying water-soluble resin emulsion diluted by 13% of water on the surface of the material obtained in the last step, and drying after uniform spraying;

(7) and (3) dipping the material obtained in the last step for 1h to enable the fireproof glue to infiltrate the core paper layer to form a glue dipping layer with the thickness of 0.6mm, placing the glue dipping layer in an environment with the temperature of 79 ℃, drying for more than 1h and shaping to obtain the fireproof board core paper.

The thickness of the skin layer was 0.32 mm.

The thickness of the inner layer is 0.21 mm.

The total thickness of the core paper layer is 1.1 mm.

Technical indexes of the air filter paper prepared based on the first, second and third examples are shown in the following table:

according to the data obtained by the performance test of the fireproof board core paper manufactured by the three embodiments, the core paper manufactured by the formula can persist for a longer time in the aspects of flame burning and flame resuming, the flame resuming time of the common fireproof board core paper is between 4.5s and 6s, and the flame burning time is between 50s and 57 s.

The fireproof core paper adopts a multilayer composite structure, the middle part is supplemented with metal wires with fine diameters, asbestos powder and a reinforcing grade which are mixed to serve as a fireproof framework layer, the integral rigidity is improved, the fireproof core paper is not easy to deform and cannot be broken before unburnt, meanwhile, the surface is uniformly sprayed with water-soluble resin emulsion to improve the fireproof performance, the inner layer adopts polyimide, the fireproof core paper has the excellent performance of resisting high temperature of more than 400 ℃, the core paper is dipped with a 0.6mm glue layer, and multiple fireproof measures are taken, so that the fireproof performance of the core paper is greatly improved, the core paper cannot be easily torn due to external force, the core paper has good rigidity, the core paper is prevented from being deformed and damaged due to heating, the.