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Super-high-molecular-weight polyolefin yarn, method for producing same, and drawing device

A technology of ultra-high molecular weight polyolefin yarn, which is applied in the fields of single-component polyolefin artificial filament, transportation and packaging, textiles and papermaking, and can solve problems such as uneven temperature distribution, single yarn breakage, and uneven temperature, and achieve Excellent uniformity, small total fineness, and small coefficient of variation of strength

Inactive Publication Date: 2013-05-08
GOSEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, when high-precision temperature control is required, it is preferable to increase the flow rate of the air blowing gas to increase the number of gas cycles per unit time. However, if the air blowing in the drawing tank becomes stronger, the yarn will shake and be scattered. , thus becoming an unstable factor in stretching
On the other hand, if the flow rate of the gas is lowered, the number of cycles per unit time decreases, so uneven temperature distribution in the tank (inlet and outlet, center and end, etc.) or temperature unevenness over time tends to occur
Especially when the total yarn fineness and single yarn fineness are fine, yarn breakage or single yarn breakage tends to occur even with relatively small fluctuations, and stable stretching is more difficult.

Method used

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  • Super-high-molecular-weight polyolefin yarn, method for producing same, and drawing device
  • Super-high-molecular-weight polyolefin yarn, method for producing same, and drawing device
  • Super-high-molecular-weight polyolefin yarn, method for producing same, and drawing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0089] As the supply sliver, an ultra-high molecular weight high-strength polyethylene single-twisted raw yarn A [manufactured by Toyobo Co., Ltd., trade name "Dyneema", 110T-96F (total fineness: 110Tex, number of filaments) stretched by the conventional method was used. : 96 strands) of raw yarn with single twist (S) 90 times / m] Tensile test was carried out. The raw yarn used had a tensile strength of 31.8 CN / dtex, an elongation of 4.8%, a DSC melting point of 150.3°C, and a crystallinity of 75%. The DSC diagram of the sliver before stretching is shown in Figure 4 a. exist Figure 4 In A, the dotted line is an auxiliary line automatically added by the analyzer for calculating the peak area. This is also the same in the following DSC charts. The length of the stretching groove of the stretching device used is 3m, and the cross-sectional shape is as follows image 3 For the hollow rectangle shown in B, use figure 1 and figure 2 The 1-stage tensile apparatus shown was u...

Embodiment 2）

[0100] As the supply sliver, knitting yarn B made of raw yarn [manufactured by Toyobo Co., Ltd., trade name "Dyneema", 55T-48F (total fineness: 55Tex, number of filaments: 48)] was used as a set of 4 , a tensile test was carried out. The weaving yarn used had a tensile strength of 25.4 CN / dtex and an elongation of 4.9%. A tensile test was performed using a tensile tank of the same jacket heating system as in Example 1. As shown in Table 3 and Table 4, the highest draw ratio was 3.2 times, which was higher than that of the comparative example. The strength of the stretched yarn at this magnification was 27.0 CN / dtex, and the elongation was 2.9%.

Embodiment 3）

[0111] As the supply sliver, a relatively thick raw yarn [manufactured by Toyobo Co., Ltd., trade name "Dyneema", 165T-144F (total fineness: 165Tex, number of filaments: 144)] formed in groups of 8 is used. Weaving yarn C was subjected to a tensile test. The weaving yarn used had a tensile strength of 23.7 CN / dtex and an elongation of 5.9%. A tensile test was performed using a tensile tank of the same jacket heating system as in Example 1. As shown in Table 3, the maximum draw ratio was 2.4 times, which was improved compared with the comparative example. The strength of the stretched yarn at this ratio was 26.0 CN / dtex, and the elongation was 3.5%.

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Abstract

When determined as the maximum peak temperature under conditions of a temperature elevation speed of 20 C / minute by a differential scanning calorimeter (DSC), the melting point of a drawn super-high-molecular-weight polyolefin yarn of the present invention is higher than the melting point of the yarn before drawing. In a production method of the present invention, a passage opening (14) for yarn is hollow, a drawing tank (3) in which hot liquid circulates is disposed in a drawing zone in a jacket part (13), and the yarn is heated and drawn while being passed, contact-free, through the passage opening (14). A drawing device of the present invention comprises means (1) for feeding yarn, the drawing tank (3) for heating and drawing yarn, and means (5) for reeling in the drawn yarn, and the yarn passage opening (14) of the drawing tank (3) is hollow and the hot liquid circulates in the jacket part (13). A drawing method and a drawing device are therefore provided with which it is possible to draw, with stability even at a high draw ratio, super-high-molecular-weight, high-strength polyolefin yarn, and yarn obtained by the drawing method is also provided.

Description

technical field [0001] The invention relates to a high-strength polyolefin yarn with ultra-high molecular weight, its manufacturing method and stretching device. Background technique [0002] High-strength polyolefin filaments represented by ultra-high molecular weight polyethylene filaments obtained by gel spinning are high-strength, lightweight, and have excellent light resistance and friction resistance, so they are used in ropes, fishing lines, and reinforcing materials , protective clothing, etc. [0003] It is known that post-stretching (re-stretching) can be performed on stretched raw yarns or slivers of twisted yarn products, braids, etc. for ultra-high-molecular-weight high-strength polyolefins. Post-stretching is also known as re-stretching. Hereinafter, in this specification, post-stretching or re-stretching is also simply referred to as "stretching". The melting point of ultra-high-molecular-weight high-strength polyolefin varies depending on the type of resin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D02J1/22D01F6/04D02J13/00D04C1/02D04C1/12
CPCD02J13/001D10B2321/0211D02G3/02D01F6/04D02G3/44Y10T428/2913D01D5/098D02J1/22D04C1/06D10B2509/04D10B2501/04D10B2505/02D10B2401/063
Inventor 广濑正幸安永惇典上杉昭二
Owner GOSEN CO LTD
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