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Waterproof and flame-retardant paper, and preparation method and application thereof

A flame-retardant paper and flame-retardant fiber technology, applied in the field of materials, can solve the problems of non-absorbent, poor environmental protection, water pollution, etc., achieve excellent water absorption and water resistance, will not cause environmental pollution, and have excellent flame-retardant performance

Inactive Publication Date: 2020-01-03
CHINA NAT PULP & PAPER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional heat exchangers are made of glass fiber and paper, among which glass fiber heat exchangers have good flame retardant effect, but do not absorb water, and the skin feels uncomfortable (prickly and itchy) during processing, difficult to dispose of after disposal, and poor in environmental protection ;Paper-based heat exchangers are usually added in the slurry or impregnated with phosphorus and nitrogen-containing flame retardants on the surface. Although they have certain water absorption and flame retardancy, they will be damaged after being soaked in water or washed by water for a long time. The flame retardant effect will be lost, and the flame retardant will be lost in the water, causing water pollution and increasing the load of environmental protection treatment
It can be seen that the traditional heat exchange fins cannot have water absorption, water resistance and flame retardancy at the same time, and cannot meet the requirements of use and environmental protection

Method used

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  • Waterproof and flame-retardant paper, and preparation method and application thereof
  • Waterproof and flame-retardant paper, and preparation method and application thereof

Examples

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preparation example Construction

[0027] The present invention also provides a method for preparing water-resistant and flame-resistant paper described in the above technical solution, comprising the following steps:

[0028] Mix the flame retardant fiber with water to decompose to obtain the flame retardant fiber slurry;

[0029] mixing the plant fiber with water for beating to obtain a plant fiber slurry;

[0030] After mixing the flame retardant fiber slurry, plant fiber slurry, wet strength agent and defoamer, dehydration forming is carried out at the wire part to obtain water-resistant and flame-retardant paper.

[0031] In the invention, the melamine fiber is mixed with water to decompose to obtain the melamine fiber slurry.

[0032] In the present invention, there is no special limitation on the method of disentangling, as long as the flame-retardant fibers can be completely dispersed, there is no parallel filaments. In the embodiment of the present invention, the deflaking is preferably performed in ...

Embodiment 1

[0046] The melamine fiber (denier 2dtex, length 5mm) of 80 parts by weight is mixed with water to be loosened, and the melamine fiber slurry that obtains mass concentration is 3.0%;

[0047] 20 parts by weight of coniferous wood fibers are mixed with water for beating to obtain a coniferous wood fiber slurry with a beating degree of 40°SR and a mass concentration of 3.0%;

[0048] The polyamide epichlorohydrin resin (purchased in Hebei Jiheng Auxiliary Co., Ltd.) of 1 weight part is formulated as an aqueous solution of wet strength agent; Audrey Technology Co., Ltd.) to prepare an aqueous solution of defoamer;

[0049] After mixing the melamine fiber slurry, coniferous wood fiber slurry, wet strength agent aqueous solution and defoamer aqueous solution, a mixed slurry with a concentration of 0.1% on the net is obtained, and the net part is dehydrated to obtain a water-resistant and flame-retardant paper.

Embodiment 2

[0051] The melamine fiber (denier 2dtex, length 5mm) of 70 parts by weight is mixed with water and dispelled, and the melamine fiber slurry that obtains mass concentration is 2.0%;

[0052] 30 parts by weight of softwood fibers are mixed with water for beating to obtain a softwood fiber slurry with a beating degree of 36°SR and a mass concentration of 2.5%;

[0053] The polyamide epichlorohydrin resin (purchased in Hebei Jiheng Auxiliary Co., Ltd.) of 0.8 parts by weight is prepared as an aqueous solution of wet strength agent; Audrey Technology Co., Ltd.) is prepared as an aqueous solution of defoamer;

[0054] After mixing the melamine fiber slurry, coniferous wood fiber slurry, wet strength agent aqueous solution and defoamer aqueous solution, a mixed slurry with a net concentration of 0.08% is obtained, and the net part is dehydrated to obtain a water-resistant and flame-retardant paper.

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Abstract

The invention provides a waterproof and flame-retardant paper, and a preparation method and an application thereof, and belongs to the technical field of materials. The waterproof and flame-retardantpaper comprises fibers and assistants; the fibers comprise 70-90 wt% of flame-retardant fibers and 10-30 wt% of plant fibers; and the assistants comprise a wet strength agent and a defoaming agent, the using amount of the wet strength agent is 0.5-1.0% of the mass of the fibers, and the using amount of the defoaming agent is 0.01-0.1% of the mass of the fibers. The waterproof and flame-retardant paper has excellent water absorption, water resistance and flame retardancy, still has excellent flame retardancy after being soaked in water, has the advantage of low cost, and is suitable for being industrially applied.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a water-resistant and flame-resistant paper and its preparation method and application. Background technique [0002] Evaporative condenser is a kind of high-efficiency heat exchange equipment, which has the advantages of high heat transfer efficiency, energy saving, compact structure and convenient installation. One of the key components in the evaporative condenser is the heat exchange fin, which is generally made into a corrugated shape, forming water flow ripples with a curved path, prolonging the water flow time, allowing the flowing air to take away the heat in the water, and improving the cooling of the circulating water. Effect. [0003] Traditional heat exchangers are made of glass fiber and paper, among which glass fiber heat exchangers have good flame retardant effect, but do not absorb water, and the skin feels uncomfortable (prickly and itchy) during processing, d...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21H21/20D21H21/12D21D1/02D21F1/66
CPCD21D1/02D21F1/66D21H21/12D21H21/20D21H27/00
Inventor 陈雪峰江骁雅李政刘文毛宗久王萌朝鲁门
Owner CHINA NAT PULP & PAPER RES INST CO LTD
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