Method for preparing thermal insulating cotton from kenaf bast

A technology of kenaf skin and thermal insulation cotton, which is applied in textiles and papermaking, papermaking, fiberboard, etc., can solve the problems of trapped people and rescue personnel casualties, toxic smoke accelerates the spread of fire, and easy breeding of bacteria, etc., and achieves good thermal insulation effect , good flame retardant performance, low price effect

Inactive Publication Date: 2015-02-04
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The organic materials in these materials release a lot of heat when burned, and produce a lot of toxic smoke, which will not only accelerate the spread of the fire, but also easily cause casualties to trapped people and rescuers.
In addition, there are dust and fine fibers in inorganic materials, which not only pollute the air but also easily breed bacteria, which has long become a hidden danger to people's health.

Method used

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  • Method for preparing thermal insulating cotton from kenaf bast

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) First peel the kenaf and wash it to get the kenaf skin.

[0020] (2) Soak the kenaf bark in 3%wt sodium hydroxide solution for 50 hours, then add water for mechanical disintegration for 12 minutes, and finally adjust the slurry concentration to 5% by refining.

[0021] (3) Add an organic mixed adhesive, a flame retardant, a waterproofing agent and a foaming agent in sequence to a 5%wt slurry aqueous solution, and foam the mixture slurry under the action of mechanical stirring to obtain a foam. Among them, the adhesive is mixed by boiling water, polyvinyl alcohol, vegetable starch, white latex and polyacrylamide (mass ratio 13:1:1:5:0.01) for a period of time, and the dosage is 60% of the dry fiber mass; The flame retardant components are chlorinated paraffin and boric acid borax (the mass ratio of boric acid and borax is 1:1), and the dosage of chlorinated paraffin and boric acid borax is 25% of the dry fiber mass; the waterproofing agent component is 15%wt of alkan...

Embodiment 2

[0025] (1) First peel the kenaf and wash it to get the kenaf skin.

[0026] (2) Soak the kenaf bark in 3%wt sodium hydroxide solution for 50 hours, then add water for mechanical disintegration for 12 minutes, and finally adjust the slurry concentration to 5% by refining.

[0027] (3) Add an organic mixed adhesive, a flame retardant, a waterproofing agent and a foaming agent in sequence to a 5%wt slurry aqueous solution, and foam the mixture slurry under the action of mechanical stirring to obtain a foam. Among them, the adhesive is mixed by boiling water, polyvinyl alcohol, vegetable starch, white latex and polyacrylamide (mass ratio 13:1:1:5:0.01) for a period of time, and the dosage is 60% of the dry fiber mass; The flame retardant components are chlorinated paraffin and boric acid borax (the mass ratio of boric acid to borax is 1:1), and the dosage of chlorinated paraffin and boric acid borax is 30% of the dry fiber mass; the waterproofing agent component is 15%wt alkane B...

Embodiment 3

[0031] (1) First peel the kenaf and wash it to get the kenaf skin.

[0032] (2) Soak the kenaf bark in 3%wt sodium hydroxide solution for 50 hours, then add water for mechanical disintegration for 12 minutes, and finally adjust the slurry concentration to 5% by refining.

[0033] (3) Add an organic mixed adhesive, a flame retardant, a waterproofing agent and a foaming agent in sequence to a 5%wt slurry aqueous solution, and foam the mixture slurry under the action of mechanical stirring to obtain a foam. Among them, the adhesive is mixed by boiling water, polyvinyl alcohol, vegetable starch, white latex and polyacrylamide (mass ratio 13:1:1:5:0.01) for a period of time, and the dosage is 60% of the dry fiber mass; The flame retardant components are chlorinated paraffin and boric acid borax (the mass ratio of boric acid to borax is 1:1), and the dosage of chlorinated paraffin and boric acid borax is 20% of the dry fiber mass; the waterproofing agent component is 15%wt of alkane...

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Abstract

The invention discloses kenaf bast thermal insulating cotton. The thermal insulating cotton is prepared by using the following steps of: soaking the kenaf bast which is taken as a raw material in an alkali liquor, carrying out mechanical solution and pulping treatment, and adding an adhesive, a flame retardant, a water-proof agent and a foaming agent into the slurry solution of the kenaf bast respectively for foaming to obtain a lightweight wall thermal insulating material the density of which is 0.01-0.09g / cm<3>. The kenaf bast thermal insulating cotton has quite low heat conductivity coefficient and quite high oxygen index, and therefore the thermal insulating cotton has good flame retardation. Compared with the existing lightweight thermal insulating material on the market (such as a glass wool board and a polyurethane foam board), the kenaf bast thermal insulating cotton has predominant advantages both in the aspects of environment friendliness and cost.

Description

technical field [0001] The invention relates to a kenaf skin thermal insulation cotton, which belongs to the technical field of thermal insulation and flame retardant materials. Background technique [0002] Thermal insulation materials and products are an important factor affecting building energy conservation. The development and application of building insulation materials have been paid more and more attention by countries all over the world. After the 1970s, foreign countries generally paid attention to the production of thermal insulation materials and their application in construction, and strived to greatly reduce energy consumption, thereby reducing environmental pollution and greenhouse effect. The thermal insulation material industry in foreign countries has a long history, most of which are thermal insulation materials for building energy conservation, and new thermal insulation materials are constantly emerging. [0003] With the acceleration of urbanization i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21J1/16
Inventor 谢拥群魏微魏起华牛敏
Owner FUJIAN AGRI & FORESTRY UNIV
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