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A preparation method of high-strength, high-modulus, high-temperature-resistant polyurethane elastic fiber

A polyurethane elastic, high-strength and high-modulus technology is applied in the fields of fiber chemical characteristics, single-component synthetic polymer rayon, chemical post-treatment of synthetic polymer rayon, etc., so that it is not easy to break, improve strength, and not easy to break internally. Effect

Active Publication Date: 2016-01-13
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] There are few reports on the modification of polyurethane products by free radicals as cross-linking agents, and they are basically concentrated on the modification of polyurethane plastic masterbatches and plastic products by melting method. There are reports

Method used

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  • A preparation method of high-strength, high-modulus, high-temperature-resistant polyurethane elastic fiber
  • A preparation method of high-strength, high-modulus, high-temperature-resistant polyurethane elastic fiber
  • A preparation method of high-strength, high-modulus, high-temperature-resistant polyurethane elastic fiber

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Experimental program
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specific example

[0048] The following implementation cases are only exemplary implementation cases, and the protection scope of the present invention is not limited thereto.

[0049] Control sample: preparation of control sample

[0050] Measure 5.27Kg of solvent dimethylacetamide (DMAC) into the pre-reaction kettle, start stirring, add 9.50Kg of polytetrahydrofuran ether glycol (PTMEG, number average molecular weight 1810) into the pre-reaction kettle, and cool the reaction kettle to 23°C in a water bath After 15 minutes of constant temperature, 2.495Kg of diphenylmethane diisocyanate (MDI) was added to the pre-reaction kettle. After 20 minutes of reaction, the pre-reaction kettle was heated to 55°C in a water bath and reacted at a constant temperature for 3.5 hours to obtain the prepolymer PPS. Transfer the PPS into the chain extension reactor, add 16.775Kg solvent DMAC to the pre-reactor, clean the pre-reactor, transfer the solvent into the chain extension reactor, start stirring, cool the ...

Embodiment 1-3

[0056] The preparation of embodiment 1-3 experimental sample

[0057] When preparing the samples of Examples 1-3, the experimental operation method is the same as that of the comparison sample, except that before the curing, a certain proportion of organic peroxide dicumyl peroxide (DCP) must be added to the curing kettle. The added ratio is shown in the data in Table 2:

[0058] Table 2 Experimental sample 1-3DCP addition ratio

[0059]

[0060] Among them: 1) Number of moles: nEDA+nPDA=nMDI-nPTMEG-nDEA / 2

[0061] 2) A is the solid content of the polymer polymerized in the chain extension reactor, that is, A is the sum of the mass of the following substances: A=mPTMEG+mMDI+mEDA+mPDA+mDEA

[0062] Each embodiment polyurethane elastic fiber physical index is listed in table 3:

[0063] Table 3 each embodiment polyurethane elastic fiber physical property index

[0064]

[0065]

[0066] Among them: SS300 is the strength when the fiber is stretched by 300%, DS is the...

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Abstract

The invention relates to a preparation method of high-strength, high-modulus and high-temperature-resistant polyurethane elastic fiber. The preparation method comprises the steps of blending polyurethane polymer stock solution with radical initiator (particularly, the initiators which decompose dialkyl peroxide at high temperature) to form spinning stock solution, decomposing the radical initiator in the spinning stock solution to release free radical when high-temperature dry spinning is carried out, and triggering polyurethane polymer to form polyurethane elastic fiber with micro-crosslink among molecules. The polyurethane elastic fiber prepared by the method has the characteristics of being high in strength, high in modulus and good in high temperature resistance, and the characteristics can prevent the silks from being broken when the polyurethane elastic fiber is unwound at high speed, can prevent the silks from being internally broken when being dyed under high temperature, so that the fiber is specifically used as the raw materials of the high-temperature dyeing fabrics and the elastic fiber of the durable and wearproof clothes for military use.

Description

technical field [0001] The invention relates to a preparation method of high-strength, high-modulus and high-temperature resistant polyurethane elastic fiber. Background technique [0002] Polyurethane elastic fiber is a synthetic fiber with excellent properties such as high elongation at break and high elastic recovery rate, and is widely used in knitted apparel, household products and other fields. When the polyurethane elastic fiber is weaved in the subsequent process, the tensile strength of the yarn is low and the tensile modulus is small. When unwinding at high speed, failures such as broken yarns are prone to occur and affect the weaving efficiency; The high temperature resistance is poor, and the yarn is prone to dyeing internal breakage in the fabric; when it is used in the future, especially when it is used as elastic fiber yarn for high-elastic jeans, it is necessary for the fiber to have excellent tensile strength and modulus in the warp direction. , in order to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/78D01F11/08C08G18/10C08G18/66C08G18/48C08G18/42
Inventor 周建军陈厚翔梁红军费长书席青
Owner ZHEJIANG HUAFENG SPANDEX
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