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Preparation method of thermal expansible yarn

A heat-expandable yarn technology, which is applied in the field of heat-expandable yarn preparation, can solve the problems of irreversibility, high temperature resistance of materials, and limited application fields, and achieve the effects of strong feasibility, simple preparation, and wide application range

Active Publication Date: 2018-11-23
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on expandable substances, such as expandable microcapsules, coating expandable microcapsules on the surface of ordinary yarns can achieve the increase effect, but because the essence of microcapsule expansion is that the low-boiling point substances in the microcapsules change from liquid to Due to the gaseous state, the microcapsule wall is a thermoplastic polymer, so the expansion of the expandable microcapsules is unsustainable and irreversible
At the same time, the maximum temperature that expandable microcapsules can withstand is about 200°C, and the application field is limited
[0005] At present, there is no expandable yarn that can withstand high temperatures. Ordinary expandable yarns rely on special enlarged structures, but special enlarged structures also depend on special yarns, and the materials used to make enlarged structural yarns Can not withstand high temperature, so the current expandable yarn can not withstand high temperature

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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  • Preparation method of thermal expansible yarn

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Experimental program
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Effect test

Embodiment 1

[0028] Such as figure 1 As shown, in order to meet the preparation method of a heat-expandable yarn of the present invention, firstly, expandable graphite and high-temperature-resistant adhesive are prepared in a certain proportion, and put into a vacuum defoaming mixer to fully stir and mix evenly to obtain Mixture. Then, the fully mixed mixture is evenly sprayed on the surface of the high-temperature-resistant fiber, and solidified under a certain temperature condition to obtain a heat-expandable fiber. Finally, the heat-expandable fiber is spun by using the existing spinning technology to obtain the heat-expandable yarn 1-1. Putting the heat-expandable yarn under high temperature conditions, the yarn will expand, and the expanded yarn 1-2 is obtained.

[0029] Preferably, the high temperature resistant fiber may be one of alumina fiber, aramid fiber, PBO fiber or any other high temperature resistant fiber.

[0030] Preferably, the high temperature resistant adhesive may ...

Embodiment 2

[0036] Heat-expandable yarns were prepared as follows.

[0037] First, the expandable graphite and the high temperature resistant adhesive are prepared in proportion, and put into a vacuum defoaming mixer for full stirring and uniform mixing to obtain a mixed solution. Then, the well-mixed mixture is evenly sprayed on the surface of the high-temperature-resistant fiber, and cured at room temperature (25° C.) to obtain heat-expandable fibers. Finally, the heat-expandable fiber is spun by using a ring spinning technology to obtain a heat-expandable yarn.

[0038] The high temperature resistant fiber is alumina fiber. The high temperature resistant adhesive is a phosphate adhesive.

[0039] Among them, the dosage ratio of expandable graphite, high temperature resistant adhesive and high temperature resistant fiber in scheme A is 2:1:8

[0040] In plan B, the dosage ratio of expandable graphite, high temperature resistant adhesive and high temperature resistant fiber is 1:1:8 ...

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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Abstract

The invention discloses a preparation method of thermal expansible yarn and belongs to the technical field of spinning. Expansible graphene and high-temperature resistant adhesives (such as phosphateadhesives and silicic acid adhesives) are uniformly mixed and stirred in a vacuum defoaming blender to obtain a mixed liquid; then, the mixed liquid is uniformly sprayed onto the surfaces of high-temperature resistant fibers (such as aluminum oxide fibers, aramid fibers and polybenzoxazole fibers) and then solidified at a certain temperature, and correspondingly expansible fibers are obtained; finally, the expansible fibers are spun into the expansible yarn by means of an existing spinning technology. When placed at the high temperature of 230 DEG C or above, the expansible yarn can expand.

Description

technical field [0001] The invention relates to a method for preparing heat-expandable yarn, which belongs to the technical field of textiles. Background technique [0002] Expandable yarn refers to the yarn that can expand radially under certain external conditions. A certain external condition can refer to a certain external force or a certain temperature condition. Since the diameter of the expandable yarn can change under certain external conditions, it can be used in protective clothing, automobile industry, aerospace and other fields. The yarn that can expand under the action of force is based on the unique helical structure of the yarn; the yarn that can expand under the action of a certain temperature is based on a unique heat-expandable substance. [0003] Based on the helical structure, Ugbolue et al. used knitting chain wales and weft-inserted yarns to form a warp-knitted structure. The wales used small and thick yarns to weave open knitting chains, and the smal...

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(China)
IPC IPC(8): D02G3/24D02G3/36D02G3/48D02G3/04D06M11/74D06M101/36D06M101/34
CPCD02G3/04D02G3/24D02G3/36D02G3/48D06M11/74D06M2101/34D06M2101/36D10B2101/00D10B2331/02D10B2331/021
Inventor 马丕波徐婉丽蒋高明缪旭红万爱兰陈晴
Owner JIANGNAN UNIV