Production technology of high-performance composite material based on Chinese hemp fibers

A technology of hemp fiber and composite material, applied in the field of high-performance composite material production technology, can solve the problem of inability to produce ultra-thin hemp fiber composite board, and achieve the effects of reducing VOC release, changing support performance, and increasing compressive elasticity

Active Publication Date: 2020-09-01
马建伟 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] CN 109333900 A discloses a continuous partial roll forming process for ultra-thin hemp fiber composite boards, which belongs to the technical field of hemp fiber composite board forming technology. Plate, proposed a method of continuous rolling after the preform is preheated at a certain temperature, so that its thickness can gradually reach an ultra-thin thickness of 0.2-2mm

Method used

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  • Production technology of high-performance composite material based on Chinese hemp fibers
  • Production technology of high-performance composite material based on Chinese hemp fibers

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Experimental program
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Effect test

Embodiment 1

[0033] A kind of production technology of the high-performance composite material based on hemp fiber, comprises the steps:

[0034] 1. Hemp fiber pretreatment:

[0035] (1), mechanical finishing: the hemp fiber raw material is mechanically stretched and rolled, and the hemp fiber raw material is subjected to physical splitting treatment, and the hemp fiber splitting degree after mechanical stretching and rolling is 1600 / g; In the process, two functions are played on the hemp fiber. The drafting can improve the uniformity of the fiber length, which is helpful for laying the net with other fibers in the later stage to facilitate needle punching and entanglement. Rolling can split the fiber and make the fiber quantity Increase.

[0036] (2) Pickling: Take acid release agent with a mass fraction of 3g / L and metal ion complexing agent with a mass fraction of 1g / L, respectively, at a bath ratio of 1:20, heat up to 50°C, keep warm for 30 minutes, and wash with water for 1 to 2 minu...

Embodiment 2

[0047] A kind of production technology of the high-performance composite material based on hemp fiber, comprises the steps:

[0048] 1. Hemp fiber pretreatment:

[0049] (1), mechanical finishing: the hemp fiber raw material is mechanically stretched and rolled, and the hemp fiber raw material is subjected to physical splitting treatment, and the splitting degree of the hemp fiber after mechanical stretching and rolling is 3600 pieces / g;

[0050] (2) Pickling: respectively take 4g / L acid release agent and 2g / L metal ion complexing agent at a bath ratio of 1:12, heat up to 65°C, keep warm for 40 minutes, wash with water for 1-2 Second-rate;

[0051] (3) Enzyme cold stack: the mass fraction is 3g / L of degumming compound enzyme, 3g / L of wetting softener, 1.5g / L of metal ion complexing agent, respectively, and the bath ratio is 1:12, and the temperature is raised to 37 ℃, after 35 hours of heat preservation, wash with water 1 to 2 times;

[0052] (4), oxygen bleaching: the mass...

Embodiment 3

[0061] A kind of production technology of the high-performance composite material based on hemp fiber, comprises the steps:

[0062] 1. Hemp fiber pretreatment:

[0063] (1), mechanical finishing: the hemp fiber raw material is mechanically stretched and rolled, and the hemp fiber raw material is subjected to physical splitting treatment, and the splitting degree of the hemp fiber after mechanical stretching and rolling is 5600 pieces / g;

[0064] (2) Pickling: respectively take 5g / L acid release agent and 3g / L metal ion complexing agent at a bath ratio of 1:5, heat up to 80°C, keep warm for 50 minutes, wash with water for 1-2 Second-rate;

[0065] (3) Enzyme cold stack: heat up to 40°C with a mass fraction of 5g / L degumming compound enzyme, 4g / L wetting softener, and 2g / L metal ion complexing agent, respectively, at a bath ratio of 1:5 , after keeping warm for 12 hours, wash with water 1-2 times;

[0066] (4), oxygen bleaching: be the oxygen bleaching auxiliary agent of 8g / ...

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Abstract

The invention discloses a production technology of a high-performance composite material based on Chinese hemp fibers. The production technology comprises the steps of firstly, Chinese hemp fiber pretreatment, specifically, the process comprises the steps of (1) mechanical neatening operation; (2) acid pickling operation; (3) enzyme cold heaping operation, specifically, by the mass percentage, 0g/L-5g/L of degumming compound enzymes, 2g/L-4g/L of wetting softening agents and 1g/L-2g/L of metal ion complexing agents are heated to enable the temperature to range from 35 DEG C to 40 DEG C under the condition that the bath ratio is 1:5-20, the temperature is kept for 12-60 hours, and then water cleaning operation is conducted for 1-2 times; (4) oxygen bleaching operation; (5) water cleaning operation; and (6) softening operation, specifically, by the mass percentage, 5g/l-10g/l of elastic finishing agents are added, the temperature is increased to range from 30 DEG C to 50 DEG C, and the temperature is kept for 20 minutes; and secondly, composite material forming, specifically, pre-opening treatment, roller carding treatment and stretch-breaking treatment are conducted, the Chinese hemp fibers which are subjected to stretch-breaking treatment is subjected to opening treatment, low-melting point fibers are subjected to opening treatment, the Chinese hemp fibers and the low-melting-point fibers are subjected to carding treatment respectively, cross laying treatment and needling treatment are conducted, and finally, the fibers are dried to form the high-performance composite material. The utilization rate of Chinese hemp raw materials is effectively improved, and the comprehensive excellent performance of compression resistance, elasticity, breathability, flame retardance andthe like is achieved.

Description

technical field [0001] The invention belongs to the technical field of hemp fiber composite materials, and in particular relates to a production process of high-performance composite materials based on hemp fibers. Background technique [0002] Hemp fiber has many properties such as moisture absorption, breathability, anti-ultraviolet radiation, anti-bacteria, anti-odor, etc. It is recognized as a new generation of natural fiber after cotton, wool and silk. Applying it in the development of textile products and making it industrialized has broad prospects. European and American experts call hemp fiber the most perfect fiber discovered by human beings so far, also known as the second layer of human skin. The international demand for hemp products is a trend, but only the army has the most demand in the domestic market, and this only accounts for a small part of the entire consumer market. Therefore, there is huge potential and space for the development of hemp products from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4382D04H1/485D04H1/425D04H1/435D06M15/65D06M13/188D06M13/207D06M16/00D06L4/13D06L4/12D06M101/06
CPCD04H1/4382D04H1/485D04H1/425D04H1/435D06M15/65D06M13/188D06M13/207D06M16/003D06L4/13D06L4/12D06M2101/06D06M2200/50
Inventor 马建伟尤士华
Owner 马建伟
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