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Ultra-high-molecular-weight polyethylene protofilament drafting method

An ultra-high molecular weight, polyethylene technology, applied in the direction of stretch spinning, artificial filament heat treatment, etc., can solve the problems of low fiber strength, the folded chain structure cannot effectively transmit loads, etc., to improve mechanical properties and improve production stability. properties, and the effect of realizing the mechanical properties of fibers

Active Publication Date: 2015-03-11
CHANGSHU SUPERFIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Before the invention of the gel spinning method, the polyethylene fiber spinning method at that time could only form a folded chain structure of polyethylene, which could not effectively transmit the load, so the fiber strength was low

Method used

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  • Ultra-high-molecular-weight polyethylene protofilament drafting method
  • Ultra-high-molecular-weight polyethylene protofilament drafting method
  • Ultra-high-molecular-weight polyethylene protofilament drafting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 and 4

[0032] This example provides an improved drafting method, which adopts such as figure 1 The traditional drafting device shown in the figure, the technological process is that the dry-freeze rubber yarn passes through 1# roller, 1# hot box, 2# roller, 2# hot box, 3# roller, 3# hot box, 4# roller, 4 #Hot box, 5# rollers are wound into rolls by the first winding roller 13 at last. The improvement lies in the change of process conditions, especially the control of the drawing deformation rate and the control of the residence time of the tow in the hot box. The specific process parameters are shown in Table 1 and Table 2.

Embodiment 2 and 5

[0034] This example provides a kind of method that adopts improved drafting device and method to draft jelly silk. Such as figure 2As shown, the improved drafting device has the same figure 1 In addition to the same five sets of first drafting rollers and four-stage first heat boxes 2, there are also three sets of second draft rolls, two-stage second heat boxes 4 and second winding rolls 33. Three sets of second drafting rolls are successively the first feed roll 30 arranged in front of the second hot box 4, the second intermediate roll 31 arranged between the adjacent secondary second hot boxes 4, and the last stage The second discharge roll 32 behind the second hot box 4 (for convenience of description, 1#, 2#, and 3# rolls are used to represent these three groups of second drafting rolls below, and the secondary second hot box 4 is used successively by 1 #, 2# hot box means). In addition, in front of the 1# roll of the second drafting roll, there is also a tension frame...

Embodiment 3 and 6

[0040] This example provides a kind of method that adopts improved drafting device and method to draft jelly silk. Such as image 3 As shown, the improved drafting device has the same figure 2 In addition to the same five sets of first drafting rolls, four sets of first hot box 2, three sets of second drafting rolls and two sets of second hot box 4, there are also two sets of third drafting rolls, one level of second hot box Box 6 and third winding drum 52 . Two groups of the third drafting rollers are respectively the third feeding roller 50 and the third discharging roller 51 located at the front and the rear of the third hot box 6 (for convenience of description, these two groups of the third drafting rollers will be referred to as 1 below. #, 2# rollers represent, and the first-level second hot box 4 is expressed with 1# hot box). In addition, a tension frame 7 is respectively provided in front of the 1# roller of the second drafting roller and the 1# roller of the thi...

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Abstract

The invention relates to an ultra-high-molecular-weight polyethylene protofilament drafting method. The drafting method comprises the steps of carrying out multi-stage drafting and rolling on ultra-high-molecular-weight polyethylene protofilaments by multi-stage first hot boxes arranged sequentially under the traction action of a first drafting roller, so that the multi-stage drafting deformation rate is progressively reduced and the total drafting deformation rate is controlled to be 70-130s<-1>; the total retention time of the ultra-high-molecular-weight polyethylene protofilament in the multi-stage first hot boxes is controlled to be 60-130S, and the retention time in each stage during multi-stage-drafting can be reduced gradually. A supramolecular structure is controlled to be formed during drafting through changes of the drafting deformation rate in multi-stage drafting and the retention time of a filament bundle in the hot box, and furthermore, the slippage among macromolecular chains during drafting can be reduced, the ultra-high-molecular-weight polyethylene fiber can be effectively stretched, and the mechanical property of the fiber can be improved.

Description

technical field [0001] The invention relates to a drawing method of ultra-high molecular weight polyethylene precursor. Background technique [0002] Ultra-high molecular weight polyethylene fiber (UHMWPE) has the advantages of high specific strength, chemical corrosion resistance, excellent aging resistance, low temperature resistance, etc., so it is widely used in the fields of bulletproof protection, composite sports equipment and marine engineering, such as bulletproof clothing, cut-resistant gloves, explosion-proof clothing, kayaks, canoes, bicycles, boats, fishing lines, marine ropes, sails, etc. The reason why ultra-high molecular weight polyethylene has the above-mentioned excellent properties is mainly due to the formation of the extended chain structure of ultra-high molecular weight polyethylene. Before the invention of the gel spinning method, the polyethylene fiber spinning method at that time could only form a folded chain structure of polyethylene, which coul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/16D01D10/02
CPCD01D5/16D01D10/02
Inventor 李振国刘兆峰丁洪昌俞波蔡建南赵鸿丽
Owner CHANGSHU SUPERFIBER
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