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Aramid yarn having excellent adhesive properties with polyurethane matrix resin, method for producing the same and aramid fabric produced therefrom

a technology of polyurethane matrix resin and aramid yarn, which is applied in the direction of weaving, coating, fibre treatment, etc., can solve the problems of deterioration in processability and impact resistance, difficulty in reducing weight, and harmful to the human body, and achieve excellent adhesive properties and low density.

Inactive Publication Date: 2020-05-28
KOLON IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an aramid yarn that has excellent adhesive properties with polyurethane resin when used as a reinforcing fiber in a fiber / resin composite material. This is achieved by using a sizing agent composition that is applied to the surface and inside of the aramid yarn during the spinning step of producing the yarn. The sizing agent composition improves the wetting property of the polyurethane resin with the aramid fabric, resulting in improved adhesive properties between the fabric and the resin. This leads to improved performance in applications such as refrigerator insulation and automotive components.

Problems solved by technology

In prior arts, glass fiber has been used as the reinforcing fiber material, but there were problems that the glass fiber has a high specific gravity, which makes it difficult to reduce the weight and is harmful to the human body.
In another prior art, carbon fiber has been used instead of glass fiber as the reinforcing fiber material, but there were problems that the carbon fiber has high specific stiffness and thus causes deterioration in processability and impact resistance.
In yet another prior art, aramid yarn or plain weave aramid fabric was used as the reinforcing fiber material, but there was a problem that adhesive properties between aramid yarn or plain weave aramid fabrics and polyurethane matrix resins are decreased and that the plain weave aramid fabric has a dense structure and thus a poor wetting property with the polyurethane matrix resin.

Method used

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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  • Aramid yarn having excellent adhesive properties with polyurethane matrix resin, method for producing the same and aramid fabric produced therefrom

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0038]As shown in FIG. 1, a sizing agent composition composed of 36 wt % of polyurethane, which is a reaction product of polytetramethylene ether glycol and isophorone diisocyanate, 4 wt % of N-methyl pyrrolidone, and 60 wt % of deionized water was supplied onto the surface of the converging roller for converging aramid monofilaments in the form of a multifilament when spinning an aramid yarn. While adhering / impregnating the sizing agent composition to the aramid yarn passing through the converging roller, the content of the polyurethane resin adhered and impregnated to the surface and inside of the aramid yarn was adjusted to 3 wt % based on the sum of the weight of the polyurethane resin adhered and impregnated to the surface and inside of the aramid yarn plus the weight of the aramid yarn before the polyurethane resin was adhered and impregnated. Thereby, 3000 denier aramid yarn was produced.

[0039]Next, the aramid yarn adhered and impregnated with the polyurethane resin as descri...

example 2

[0044]As shown in FIG. 1, a sizing agent composition composed of 42 wt % of polyurethane, which is a reaction product of polytetramethylene ether glycol and isophorone diisocyanate, 4 wt % of N-methyl pyrrolidone, and 54 wt % of deionized water, was supplied onto the surface of the converging roller for converging aramid monofilaments in the form of a multifilament when spinning an aramid yarn. While adhering / impregnating the sizing agent composition to the aramid yarn passing through the converging roller, the content of the polyurethane resin adhered and impregnated to the surface and inside of the aramid yarn was adjusted to 5 wt % based on the sum of the weight of the polyurethane resin adhered and impregnated to the surface and inside of the aramid yarn plus the weight of the aramid yarn before the polyurethane resin was adhered and impregnated. Thereby, 1500 denier aramid yarn was produced.

[0045]Next, the aramid yarn adhered and impregnated with the polyurethane resin as descr...

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Abstract

An aramid yarn which is adhesive to a polyurethane matrix resin is disclosed. The polyurethane resin is adhered and impregnated to the surface and inside of the aramid yarn, and the content of the polyurethane resin is 1.5 to 7.0% by weight based on the sum of the weight of the polyurethane resin adhered and impregnated to the surface and inside of the aramid yarn plus the weight of the aramid yarn before the polyurethane resin is adhered and impregnated. An aramid fabric is woven into a basket-weave structure and thus has low denseness, the wetting property with the polyurethane matrix resin which is impregnated into the aramid fabric is improved, and consequently, the adhesive properties between the aramid fabric and the polyurethane matrix resin are improved.

Description

TECHNICAL FIELD[0001]The present invention relates to an aramid yarn having excellent adhesive properties with a polyurethane matrix resin, a method for producing the same, and an aramid fabric produced therefrom. More particularly, the present invention relates to an aramid yarn which has an excellent wetting property with a polyurethane matrix resin, can improve adhesive properties between polyurethane matrix resins when used as a reinforcing fiber for a fiber / resin composite material, and thus is useful as refrigerator insulation materials, automotive component materials, and electronic component materials, a method for producing the same, and an aramid fabric produced therefrom.BACKGROUND ART[0002]As a heat-insulating material for electronic products such as refrigerators, a heat-insulating material in which a ceramic material adheres to a composite material composed of reinforcing fiber material and polyurethane matrix resin has been widely used.[0003]The reinforcing fiber mate...

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 Applications(United States)
IPC IPC(8): D03D15/00D03D13/00D06M15/564
CPCD03D15/00D10B2331/021D03D13/004D10B2101/12D06M15/564D10B2401/063D03D13/008D06M15/53D06M15/568D06M2101/36D06M2200/40D01F6/605D01F11/08D01D5/06D03D15/283D10B2331/10B29B15/125D06M11/05D06N3/0006D06M2101/34
Inventor YANG, JI EUNPARK, HYUN JUNGYOON, SANG JUN
Owner KOLON IND INC