Polyethylene fiber composite cloth with high protection performance and preparation and application thereof

A technology of polyethylene fiber and composite cloth, applied in protective equipment, protective equipment, applications, etc., can solve the problems of increasing the bulletproof discreteness of polyethylene fiber composite cloth and affecting the appearance quality of products, and achieve the improvement of the interlayer adhesion of composite cloth. Bonding and anti-ballistic properties, reducing hair and broken wires, and reducing artificial effects

Active Publication Date: 2021-05-28
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual production process of polyethylene fiber composite cloth, if these polyethylene fibers with low monofilament fineness and bundle fineness are unrolled from the creel, under the action of tension, they will pass through the friction of multiple guide rods, threading holes and dividing reeds. Afterwards, it is particularly easy to produce hair and broken wires. After the joints of these hairs and broken wires are glued in the glue tank and dried in the oven, a certain range of defects will be formed on the polyethylene fiber composite cloth, which not only affects the appearance quality of the product, but also It also increases the bulletproof dispersion of polyethylene fiber composite cloth

Method used

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  • Polyethylene fiber composite cloth with high protection performance and preparation and application thereof

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Embodiment 1

[0036]UHMWPE fibers with bundle fineness of 1500D, single filament fineness of 3.1D, tensile strength of 34cN / dtex, and tensile modulus of 1100cN / dtex are used to prepare polyethylene fiber composite cloth, and the fibers are unwound from the creel and laid flat , after heating and drawing, gluing, drying, and winding to obtain unidirectional polyethylene fiber cloth. Among them, the temperature of heating and drawing is 155°C, the drawing ratio is 2.5 times, the fineness of polyethylene bundle after drawing is about 600D, the fineness of single filament is about 1.25D, the tensile strength is about 37.5cN / dtex, and the tensile modulus is about 1380cN / dtex; gluing adopts the method of fiber dipping in water-based polyurethane glue tank, in which the activation temperature of polyurethane is 110°C, and the oven drying adopts the method of 3-stage temperature gradient reduction, and the three-stage temperatures are 100°C and 90°C respectively , 80°C; after winding, the surface d...

Embodiment 2

[0039] UHMWPE fibers with bundle fineness of 800D, single filament fineness of 2D, tensile strength of 36cN / dtex, and tensile modulus of 1250cN / dtex are used to prepare polyethylene fiber composite cloth, and the fibers are unwound from the creel and laid flat. After heating and drawing, gluing, laminating, drying and winding, the unidirectional polyethylene fiber cloth is obtained. Among them, the temperature of heating and drawing is 160°C, the drawing ratio is 2 times, the fineness of the polyethylene fiber bundle after drawing is about 400D, the single filament fineness is about 1D, the tensile strength is about 40.2cN / dtex, and the tensile modulus is about 1500cN / dtex; gluing adopts the method of fiber dipping in water-based polyacrylic glue tank, in which the activation temperature of polyacrylic glue is 95°C, and the oven drying adopts the method of 4-stage temperature gradient reduction, and the temperature of the four stages is 90°C respectively , 85°C, 80°C, 75°C; ot...

Embodiment 3

[0051] A preparation method of polyethylene fiber composite cloth with high protection performance, comprising the following steps:

[0052] 1) The ultra-high molecular weight polyethylene fiber with high denier is unwinded and laid, heated and drawn, glued and dried in sequence to obtain a unidirectional polyethylene fiber cloth;

[0053] 2) After the multi-layer unidirectional polyethylene fiber cloth is cross-laminated and compounded, it is rolled together with the isolation layer, and then vacuum hot-pressed to obtain a polyethylene fiber composite cloth. In the polyethylene fiber composite cloth, the glue content is 5wt%.

[0054] In step 1), the activation temperature of the glue is 150°C. The monofilament fineness of ultra-high molecular weight polyethylene fiber is ≥2D, the bundle fineness is ≥800D, the tensile strength is ≥32cN / dtex, and the tensile modulus is ≥800cN / dtex. During the heating and drawing process, the heating temperature is 120° C., and the drawing ra...

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Abstract

The invention relates to a polyethylene fiber composite cloth with high protection performance and preparation and application thereof, a preparation method comprises the following steps: 1) high-fineness ultra-high molecular weight polyethylene fibers are sequentially subjected to unwinding and tiling, heating and drafting, gluing and drying to obtain unidirectional polyethylene fiber cloth; (2) carrying out cross lamination and compounding on multiple layers of unidirectional polyethylene fiber cloth, rolling together with an isolating layer, and then carrying out vacuum hot-pressing shaping treatment, so as to obtain polyethylene fiber composite cloth; wherein the activation temperature of the glue is 50-150 DEG C, and the glue content is 5-30wt%; and the polyethylene fiber composite cloth is used in a soft bulletproof armor or a hard bulletproof armor. Compared with the prior art, the preparation method has the advantages that conventional high-denier monofilament and bunched ultra-high molecular weight polyethylene fibers are adopted, heating and drafting are carried out after unwinding and tiling, the activation temperature and the gluing amount of glue are controlled, and vacuum hot-pressing shaping treatment is carried out after compounding, so that the prepared polyethylene fiber composite cloth is good in appearance quality, high in bulletproof performance and small in discreteness.

Description

technical field [0001] The invention belongs to the technical field of polyethylene fiber composite cloth, and relates to a polyethylene fiber composite cloth with high protection performance and its preparation and application. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) has superior mechanical properties that other conventional molecular weight polyethylenes do not have due to its high molecular weight. UHMWPE molecular chains are very long and entangled with each other. Through dry or wet spinning, the intertwining between molecular chains can be opened to obtain high-performance polyethylene fibers with an extended chain structure. This kind of fiber has high specific modulus and specific strength, and is widely used in military and police ballistic protection fields. [0003] At present, UHMWPE fiber bulletproof composite cloth is generally prepared by the following process: multiple UHMWPE fibers are unwound from the creel, spread e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/02B32B27/32B32B27/12B32B37/06B32B37/10B32B38/00B32B38/08B32B38/18F41H5/04
CPCB32B5/02B32B5/26B32B37/06B32B37/10B32B38/0036B32B38/08B32B38/0012B32B38/1858F41H5/0485B32B2038/0028B32B2260/023B32B2260/046B32B2262/0253B32B2571/02
Inventor 黄金元许海霞王新威孙勇飞李济祥郑晗李建龙吴向阳
Owner SHANGHAI RES INST OF CHEM IND
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