Modified ultra-high molecular weight polyethylene fiber forming special material, and preparation method and melt spinning fiber forming method thereof

An ultra-high molecular weight, melt-spinning technology, applied in the field of high-strength fiber materials, can solve problems such as extrusion distortion, adhesion-slip flow, etc., achieve good mechanical properties, uniform and dense fiber internal structure, and meet fineness and strength requirements Effect

Active Publication Date: 2018-10-16
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the melt spinning process, the size of the spinneret flow channel is much smaller than the mold of the pipe, sheet and other forming equipment, and the melt is subject to strong shear, which is easy to p

Method used

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  • Modified ultra-high molecular weight polyethylene fiber forming special material, and preparation method and melt spinning fiber forming method thereof
  • Modified ultra-high molecular weight polyethylene fiber forming special material, and preparation method and melt spinning fiber forming method thereof
  • Modified ultra-high molecular weight polyethylene fiber forming special material, and preparation method and melt spinning fiber forming method thereof

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[0034] Example 1

[0035] Modified ultra-high molecular weight polyethylene fiber-forming special material, raw material composition: select ultra-high molecular weight polyethylene with a viscosity average molecular weight of 1.5 million, high density polyethylene (melt flow rate 5~7g / 10 min), antioxidant, modified Nano-silica (particle size 30nm), weight ratios are respectively 60%, 37.2%, 1%, 1.8%, mixed by high-mixer and twin-screw extruder for mixing and granulating to prepare melt spinning Pellets.

[0036] The specific modification treatment method of the modified nano-silica is as follows: drying the nano-silica at an oven temperature of 80° C. for 20 minutes; dispersing the dried nano-silica in absolute ethanol and adding it The titanate coupling agent with a mass fraction of 1.5%, ultrasonically dispersed in a water bath at 80°C for 40 minutes, and the ethanol is completely volatilized at an oven temperature of 85°C to obtain modified nano-silica, which has a good disper...

Example Embodiment

[0038] Example 2

[0039] Modified ultra-high molecular weight polyethylene fiber-forming special material, raw material composition: select ultra-high molecular weight polyethylene with a viscosity average molecular weight of 1.5 million, high density polyethylene (melt flow rate 5~7g / 10 min), antioxidant, modified Nano silica (particle size 30nm), modified nano titanium dioxide (particle size 100nm), the weight ratio is 70%, 26.5%, 1%, 1.5%, 1% respectively, blended by high mixer and twin screw extrusion Mix and granulate out of the machine to prepare melt-spun pellets.

[0040] The specific modification treatment method of the modified nano-silica or modified nano-titanium dioxide is as follows: drying the nano-silica or the modified nano-titanium dioxide at an oven temperature of 80°C for 20 minutes; drying the treated nano-silica Or the modified nano-titanium dioxide is completely dispersed in absolute ethanol, added with 1.5% silane coupling agent, ultrasonically dispersed i...

Example Embodiment

[0042] Example 3

[0043] Modified ultra-high molecular weight polyethylene fiber-forming special material, raw material composition: select ultra-high molecular weight polyethylene with a viscosity average molecular weight of 1.5 million, high density polyethylene (melt flow rate 5~7g / 10 min), antioxidant, modified Nano silica (particle size 30nm), modified nano titanium dioxide (particle size 100nm), the weight ratios are 76%, 20%, 1%, 1.8%, 1.2%, respectively, blended by high mixer and twin screw extrusion Mix and granulate out of the machine to prepare melt-spun pellets.

[0044] The specific modification treatment method of the modified nano-silica or modified nano-titanium dioxide is as follows: drying the nano-silica or the modified nano-titanium dioxide at an oven temperature of 80°C for 20 minutes; drying the treated nano-silica Or the modified nano-titanium dioxide is completely dispersed in absolute ethanol, added with 1.5% silane coupling agent, ultrasonically disperse...

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Abstract

The invention relates to a modified ultra-high molecular weight polyethylene fiber forming special material, and a preparation method and a melt spinning fiber forming method thereof, and belongs to the technical field of high quality fiber materials. The special material is prepared from the following ingredients: ultra-high molecular weight polyethylene, high-density polyethylene, antioxygen andmodified nanometer inorganic filler. The melt spinning fiber forming method for the modified ultra-high molecular weight polyethylene fiber forming special material comprises the following steps: carrying out fusion plasticization on the modified ultra-high molecular weight polyethylene fiber forming special material through a single screw extruder, entering a spinning box body through a meteringpump device, carrying out fusion extrusion by a spinning component, and taking the heating function of a slow cooling device as an auxiliary to prepare a primary filament; S2: carrying out preliminary drawing on the primary filament obtained in S1, entering a four-level hot roller traction system to be subjected to grading drawing and sizing, and rolling through a fiber rolling device, and obtaining a finished product fiber. By use of the melt spinning fiber forming technology, middle and high strength ultra-high molecular weight polyethylene fibers can be produced at low cost, and the application of the middle and high strength ultra-high molecular weight polyethylene fibers in civilian field including labor protection, marine fishery and the like can be widely expanded.

Description

technical field [0001] The invention belongs to the technical field of high-strength fiber materials, and in particular relates to a special fiber-forming material for modified ultra-high molecular weight polyethylene, a preparation method thereof, and a melt-spinning fiber-forming method. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) fiber is a high-strength special fiber, and its products play a pivotal role in safety, protection, aviation, aerospace, national defense equipment, vehicle manufacturing, shipbuilding, sports and other fields. At present, the method of industrialized preparation of UHMWPE fiber in the world is mainly gel spinning method, that is, the UHMWPE raw material is dissolved in a solvent to form a gel solution for spinning. According to the different solvents used, it can be divided into: dry route (using decahydronaphthalene High volatility solvents, represented by DSM / Toyobo) and wet route (using low volatility solve...

Claims

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Application Information

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IPC IPC(8): D01F6/46D01F1/10D01D10/02D01D5/16D01D5/08
CPCD01D5/08D01D5/16D01D10/02D01F1/10D01F6/46
Inventor 薛平刘丽超王非王苏炜付丽
Owner BEIJING UNIV OF CHEM TECH
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