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Preparation method of ultrahigh molecular weight polyethylene (UHMWPE) short fibers

A technology of ultra-high molecular weight and polyethylene, which is applied to the types of furnaces, lighting and heating equipment, drying, etc., and can solve problems such as differences in mechanical properties and inapplicability

Inactive Publication Date: 2013-03-27
杨珍芬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large difference in mechanical properties between ultra-high molecular weight polyethylene fibers and ordinary polyethylene fibers, the process for preparing PE short fibers in the prior art is not suitable for preparing ultra-high molecular weight polyethylene short fibers.

Method used

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  • Preparation method of ultrahigh molecular weight polyethylene (UHMWPE) short fibers
  • Preparation method of ultrahigh molecular weight polyethylene (UHMWPE) short fibers
  • Preparation method of ultrahigh molecular weight polyethylene (UHMWPE) short fibers

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preparation example Construction

[0026] The embodiment of the present invention discloses a method for preparing ultra-high molecular weight polyethylene short fibers, including:

[0027] Preheating: Preheat the ultra-high molecular weight polyethylene long fibers at 40°C to 60°C;

[0028] Crimping: mechanically crimping the preheated ultra-high molecular weight polyethylene long fibers;

[0029] Drying: The crimped ultra-high molecular weight polyethylene long fibers are sequentially subjected to first-stage drying, second-stage drying, and third-stage drying. In the first-stage drying, the hot air direction is from above the ultra-high molecular weight polyethylene long fibers Blowing downwards, in the third stage drying, the direction of the hot air is blowing downwards from above the ultra-high molecular weight polyethylene long fibers;

[0030] Cutting: Cut the dried ultra-high molecular weight polyethylene long fibers into short fibers of 50mm-100mm.

[0031] For the spinning method of UHMWPE, fibers ...

Embodiment 1

[0048] 1. The fibers spread evenly

[0049] Place the 400-denier RYX90 ultra-high molecular weight polyethylene fiber produced by Ningbo Rongyi Chemical Fiber Technology Co., Ltd. on the creel 11. The spindles on the creel pass through the cluster frame 12 and then gather into bundles. After passing through the static electricity generation device 13, they enter the static elimination Device 14, eliminates static electricity.

[0050] 2. Preheat

[0051] The uniformly spread fibers were preheated at a temperature of 50 °C through a heat shaft.

[0052] 3. Curly.

[0053] 4. Dry

[0054] The crimped ultra-high molecular weight polyethylene long fibers are sequentially subjected to the first stage drying, the second stage drying, and the third stage drying:

[0055] 4a. Introduce the pre-dried ultra-high molecular weight polyethylene long fibers 4 into the first drying chamber 1 for first-stage drying, control the direction of the hot air to blow from the bottom to the top o...

Embodiment 2

[0061] 1. The fibers spread evenly

[0062] In the present embodiment, the fiber uniform spreading process is the same as in embodiment 1.

[0063] 2. Preheat

[0064] The uniformly spread fibers were preheated at a temperature of 42°C through a heat shaft.

[0065] 3. Curly.

[0066] 4. Dry

[0067] The crimped ultra-high molecular weight polyethylene long fibers are sequentially subjected to the first stage drying, the second stage drying, and the third stage drying:

[0068] 4a. Introduce the crimped ultra-high molecular weight polyethylene long fibers 4 into the first drying chamber 1 for first-stage drying, control the direction of hot air to blow from the bottom of the ultra-high molecular weight polyethylene long fibers 4 to the top, and set the drying temperature to 100°C. Set to 85m / min;

[0069] 4b. Introduce the ultra-high molecular weight polyethylene long fibers 4 after the first stage drying into the second drying chamber to carry out the second stage drying...

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Abstract

The invention provides a preparation method of ultrahigh molecular weight polyethylene (UHMWPE) short fibers, comprising the following steps: preheating UHMWPE long fibers at 40-60 DEG C; curling the preheated UHMWPE long fibers; sequentially carrying out first-stage drying, second-stage drying and third-stage drying on the curled UHMWPE long fibers, wherein in the first-stage drying, hot wind is blown to the UHMWPE long fibers in a direction from the bottom up, in the second-stage drying, the hot wind is blown to the UHMWPE long fibers in a direction from the top down, and the in the third-stage drying, the hot wind is blown to the UHMWPE long fibers in a direction from the top down; and cutting the dried UHMWPE long fibers into short fibers of 50-100mm. An anti-spike fabric prepared from the UHMWPE short fibers prepared in the invention has the advantages of uniform mechanical property and higher anti-spike grade.

Description

technical field [0001] The invention relates to the field of safety protection, in particular to a preparation method of ultra-high molecular weight polyethylene short fibers. Background technique [0002] Stab-resistant fabrics have an important application in the field of safety protection. Users wearing stab-resistant clothing made of stab-resistant fabrics can effectively resist external attacks, thereby ensuring the safety of personal and property. [0003] Most of the traditional stab-resistant fabrics are made of aramid fiber, but the price of aramid fiber is relatively expensive. In order to reduce production costs, there has been a process for preparing stab-resistant fabrics with PE (polyethylene) fibers as a raw material. Chinese patent document CN101357010A discloses a method for making a soft stab-resistant insole. In this patent, one layer or Multi-layer PE non-woven fabric and one or more layers of PE woven fabric are compounded and pressed into shape. In thi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D02J13/00D02J1/18D02G1/00D01G1/04F26B3/06
Inventor 赵罗杰陈永银周成程黄金帮陈钢
Owner 杨珍芬
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