Composite material for preparing intermediate strength fibers and quick forming method and application hereof

A composite material and medium-strength fiber technology, applied in the direction of fiber chemical characteristics, conjugated synthetic polymer rayon, rayon manufacturing, etc., can solve the problem of low critical shear rate, thermal shear insensitivity, high melt viscosity, etc. problems, to achieve the effects of simple equipment and process, reduced production and preparation costs, and high tensile strength

Pending Publication Date: 2019-01-18
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the molecular weight of UHMWPE is extremely large, and the intertwined molecular segments make its melt viscosity extremely high, which is extremely insensitive to thermal shear and has a very low critical shear rate, making it difficult to fully melt the macromolecular chain in the melt state. Untangle, and then make it orientationally arranged, so it is difficult to form by melting and directly extruding the raw filaments and then undergoing multiple thermal stretching

Method used

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  • Composite material for preparing intermediate strength fibers and quick forming method and application hereof
  • Composite material for preparing intermediate strength fibers and quick forming method and application hereof
  • Composite material for preparing intermediate strength fibers and quick forming method and application hereof

Examples

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Effect test

Embodiment 1

[0030] (1) Put 10 parts of polycarbonate thermotropic liquid crystal polymers (with a melting point of 138°C) and 100 parts of polyethylene grafted with maleic anhydride in a mixing tank and mix them uniformly to prepare a flow modifier. The structural formula of the polycarbonate thermotropic liquid crystal polymer is:

[0031]

[0032] (2) 100 parts of ultra-high molecular weight polyethylene (molecular weight distribution is 4.8, viscosity-average molecular weight is 1.02 million) and 1 part of flow modifier prepared in step (1) are mixed uniformly to prepare component A; 0.1 part Polyethylene wax, 1 part of low-density polyethylene (melt index 27g / 10min) was mixed uniformly in a mixing tank to obtain component B; component A was uniformly mixed with component B and 0.1 part of antioxidant 1010 to obtain a composite special material.

[0033] (3) Extrude the prepared medium-strength fiber composite special material through a single-screw extruder with an aspect ratio of...

Embodiment 2

[0035] (1) 100 parts of polyamide thermotropic liquid crystal polymer (copolyester of hydroxybenzoic acid, hydroquinone, sebacic acid) (melting point is 239 ° C), 100 parts of polyethylene with methacrylic acid Place in a mixing kettle and mix evenly to obtain a flow modifier.

[0036] (2) 100 parts of ultra-high molecular weight polyethylene (molecular weight distribution is 4.2, viscosity-average molecular weight is 5.96 million) and 40 parts of flow modifiers prepared in step (1) are mixed to obtain component A; 10 parts A mixture of polyethylene wax and oleic acid amide, 40 parts of high-density polyethylene (melt index 18g / 10min) is mixed uniformly in a mixing tank to prepare component B; component A and component B and 1 part of antioxidant 1076 Mix evenly to prepare composite special material.

[0037] (3) Extrude the prepared medium-strength fiber composite special material through a single-screw extruder with an aspect ratio of 30 and a compression ratio of 5 through...

Embodiment 3

[0039] (1) 50 parts of polyamide thermotropic liquid crystal polymer (copolyester of hydroxybenzoic acid, hydroquinone, sebacic acid) (melting point is 239 ° C), 100 parts were contacted with methyl methacrylate The branched polyethylene is placed in a mixing kettle and mixed evenly to obtain a flow modifier.

[0040] (2) 100 parts of ultra-high molecular weight polyethylene (molecular weight distribution is 4.3, viscosity average molecular weight is 2,500,000) and 20 parts of flow modifiers prepared in step (1) are mixed to obtain component A; 5 parts The mixture of calcium stearate and magnesium stearate, 20 parts of high-density polyethylene (melt index 18g / 10min) are mixed homogeneously in the mixing tank to prepare component B; component A and component B and 0.5 part of antioxidant Agent 264 is mixed evenly to prepare composite special material.

[0041] (3) Extrude the prepared medium-strength fiber composite special material through a single-screw extruder with a leng...

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Abstract

The invention relates to a composite material for preparing intermediate strength fibers and a quick forming method and an application hereof. The composite material comprises 100 parts of ultrahigh molecular weight polyethylene, 1-40 parts of a flow modifier, 0-10 parts of a lubricant, 1-40 parts of polyolefin and 0-1 part of an antioxidant. The method comprises the following steps: mixing ultrahigh molecular weight polyethylene with the flow modifier to prepare a compound A; mixing the lubricant with polyolefin through a mixing kettle to prepare a component B; and finally, mixing the component A, the component B and the antioxidant uniformly to prepare the composite material. The application comprises the following steps: extruding the compound special material through a single screw extruder to obtain a precursor; thermally stretching the precursor at 8-64 times at 110-150 DEG C; and finally, coiling the precursor to obtain a product. Compared with the prior art, no solvents are used, so that the method is more environment-friendly. By adding the flow modifier, the melt viscosity is reduced greatly, and the production efficiency is improved. Meanwhile, fibers also have excellentmechanical properties, and can replace nylon in the fields of marine ropes, fishing nets and fish tapes, sports articles and industrial protection.

Description

technical field [0001] The invention belongs to the field of advanced composite materials, in particular to a composite material for preparing medium-strength fibers and a rapid prototyping method thereof. Background technique [0002] Ultra High Molecular Weight Polyethylene Fiber (UHMWPE for short) fiber is made of powdered UHMWPE resin with a molecular weight of 1 to 5 million or even higher, and is now mainly made by gel spinning. The macromolecules in UHMWPE fibers are highly oriented and have an extended chain structure, and have high crystallinity, so they have extremely high strength and modulus. Its density is only 0.97g / cm 3 , so it has the excellent characteristics of light weight; strong chemical inertness makes it almost unchanged in strength under the conditions of strong acid, strong alkali solution and organic solvent; at the same time, it has good weather resistance such as ultraviolet resistance and low temperature resistance; in addition, UHMWPE fiber ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L69/00C08L51/06C08L77/00C08K5/134D01F6/46D01F8/06D01F1/10
CPCC08L23/06C08L2203/12C08L2205/025C08L2205/035C08L2207/062C08L2207/068D01F1/10D01F6/46D01F8/06C08L69/00C08L51/06C08K5/1345C08L77/00
Inventor 赵文静李志冯玲英沈贤婷夏晋程洪尉
Owner SHANGHAI RES INST OF CHEM IND
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