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Polyamide 56 high-tenacity yarn for demolding cloth, demolding cloth and preparation method and application thereof

A polyamide and high-strength technology, which is applied in the field of polyamide materials, can solve the problems that the release performance of the release cloth needs to be improved, and achieve the effects of saving production investment, excellent stretching, and easy tearing

Pending Publication Date: 2022-08-09
CATHAY R&D CENT CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is to provide a kind of polyamide 56 high-strength wire for release cloth, release cloth and its preparation method and application in order to overcome the defect that the release performance of the release cloth needs to be improved in the prior art.

Method used

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  • Polyamide 56 high-tenacity yarn for demolding cloth, demolding cloth and preparation method and application thereof
  • Polyamide 56 high-tenacity yarn for demolding cloth, demolding cloth and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0135] 1. The preparation of polyamide 56 high -strength silk includes the following steps:

[0136] (1) Poinide 56 resin to increase the phase and adhes up, adjust the water, obtain high -adhesive polyamide resin, heated to the melting state, and obtain a high -adhesive polyamide melt;

[0137] (2) Transfer high -adhesive polyamide melts to draw into the spinning box through the melt pipeline to form a newborn wire;

[0138] (3) Pre -heating, cooling, oil, pre -network, multi -level stretching, tension thermal fixed type, two -level relaxation thermal setting, main network, and wound, obtaining polyamide 56 high -strength wires.

[0139] Among them, the consolidation temperature of the solid phase (1) is 150 ° C; the solid -phase adhesion time is 30h; the polyamide resin water is divided into 600 ppm; the relative viscosity of the polyamide resin after water is 3.1, the polyamide resin Copper ion content is 65ppm;

[0140] The heating in the step (1) is performed in the screw ext...

Embodiment 2

[0156] 1. Polyamine 56 high -strength silk, preparation method is the same as the implementation example 1, the difference is:

[0157] Step (1) The consolidation temperature of the solid phase is 160 ° C; the solid phase increased time is 20h; the polyamide resin water after the water is divided into 500 ppm; The content is 68ppm;

[0158] Step (2), the temperature of the spinning box is 288 ° C;

[0159] Polyamine 56 high -strength silk has the following characteristics: the content of copper ions is 65ppm; the fibrousness is 233DTex; the number of holes is 36 holes; the fracture strength is 1900cn; the broken strength is 8.1cn / dtex; The elongation rate of the break is 22.5 %; 4.7CN / DTEX fixed load elongation rate is 9.5 %; 177 ° C, 2min dry thermal contraction rate is 6.5 %; 9.0 %.

[0160] 2. The preparation method of polyamide 56 removal is the same as the embodiment 1. The difference is that the thermal fixed temperature is 130 ° C.

[0161] The preparation of the prepared p...

Embodiment 3

[0163] 1. Polyamine 56 high -strength silk, preparation method is the same as the implementation example 1, the difference is:

[0164] Step (1) The consolidation temperature of the solid phase is 165 ° C; the solid -phase adhesion time is 25h; the polyamide resin water after the water is divided into 560 ppm; the relative viscosity of the polyamide resin after water is 3.4; The content is 75ppm;

[0165] The heating in the step (1) is performed in the screw extrusion machine, and the screw extrusion machine is divided into five zones heating. Among them, the temperature in the first area is 278 ° C, the temperature of the second zone is 288 ° C, the temperature of the three districts is 293 ° C, the four districts are in the four districts, and the four districts are in the four districts. The temperature is 298 ° C, the temperature of the five districts is 295 ° C;

[0166] In step (2), the temperature of the spinning box is 292 ° C.

[0167] Polyamine 56 high -strength silk has...

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Abstract

The invention discloses a polyamide 56 high-tenacity yarn for demolding cloth, the demolding cloth and a preparation method and application of the polyamide 56 high-tenacity yarn. The polyamide 56 high-tenacity yarn for the demolding cloth has the following characteristics that the copper ion content is 55-90 ppm, the hole number is 30-48, the breaking strength is larger than or equal to 6.8 cN / dtex, the 2min dry heat shrinkage rate is smaller than or equal to 7.5% at the temperature of 177 DEG C, the 4h heat-resistant strength retention rate is larger than or equal to 90% at the temperature of 180 DEG C, the initial modulus is larger than or equal to 40 cN / dtex, and the constant load elongation of 4.7 cN / dtex is 8-15%. The polyamide 56 high-tenacity yarn prepared by the invention has good properties of high strength, good heat resistance, high elasticity, wear resistance, good dimensional stability and chemical resistance, and is especially suitable for demolding cloth. The release cloth prepared from the polyamide 56 high-tenacity yarn has excellent tensile strength, tensile strength and peel strength, and also has good heat resistance.

Description

Technical field [0001] The present invention is the field of polyamide material technology, which involves a dehuminamide 56 high -strength silk, removal and preparation methods and applications. Background technique [0002] With the rapid development of composite materials, the crowded process and vacuum irrigation process are becoming more and more mature, and the use of removing molds as auxiliary materials in pulling and vacuum filtering. Cloth. [0003] The patent number CN 215969669 U disclosed a nylon removal layer, including the desertation of the layer, the upper layer, the lower layer, the hole, and the indicator bar. ; There are multiple sets of the hole, and the position of the passing hole is symmetrically set up above the bottom of the deillation layer; there are multiple instruction bar settings, and the indicator strip is provided with symmetrical positions on the surface of the upper and lower layers. The settings of the dehuminarium of this practical new type o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/60D01D5/098D03D13/00D03D15/283
CPCD01F6/60D01D5/098D03D13/00D03D15/283D10B2331/02D10B2401/063D10B2401/04
Inventor 孙朝续刘修才
Owner CATHAY R&D CENT CO LTD
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