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A composite material of ultra-high molecular weight polyethylene film and its preparation method

A technology of ultra-high molecular weight and polyethylene film, which is applied in the field of advanced composite materials, can solve problems such as melt fracture, high molecular weight, and high melt viscosity, and achieve the effects of improving production efficiency, excellent mechanical properties, and reducing production costs

Active Publication Date: 2021-08-31
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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. Disentanglement, melt fracture is very easy to occur during the extrusion process, so it is difficult to use a film-forming method of a material with good fluidity-that is, the method of first melting and then casting to produce a film

Method used

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  • A composite material of ultra-high molecular weight polyethylene film and its preparation method
  • A composite material of ultra-high molecular weight polyethylene film and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A total of 100 parts of a mixture (melt index 7.22g / 10min) of low-density polyethylene (Mw=62,000, distribution 5.2) and high-density polyethylene (HDPE Mw=162,000, distribution 3.55) was mixed with 1 part of Vinylidene fluoride (particle size ≥ 40 mesh, melt index 28.2g / 10min) ground by a grinder and 1 part of stearic acid lubricant were placed in a high-speed mixer and mixed evenly to prepare a composite modifier for use. Put 100 parts of UHMWPE (viscosity average molecular weight 1.12 million, molecular weight distribution width of 4.2) and 0.5 parts of liquid paraffin in a high-speed mixer and mix evenly, then add 10 parts of composite modifier and 0.1 part of antioxidant 1010 to continue Mix until evenly prepared composite special material. The composite special material is granulated by a twin-screw extruder with the temperature set at 180-220° C. to obtain composite special material particles. Extrude the prepared composite special material particles through a s...

Embodiment 2

[0035] A total of 100 parts of a mixture (melt index 7.22g / 10min) of low-density polyethylene (Mw=62,000, distribution 5.2) and high-density polyethylene (HDPE Mw=162,000, distribution 3.55) was mixed with 20 parts of Vinylidene fluoride (particle size ≥ 40 mesh, melt index 28.2g / 10min) ground by a grinder and 20 parts of stearic acid lubricant were placed in a high-speed mixer and mixed uniformly to prepare a composite modifier for use. Put 100 parts of UHMWPE (viscosity average molecular weight 1.12 million, molecular weight distribution width of 4.2) and 10 parts of polyethylene wax in a high-speed mixer and mix evenly, then add 10 parts of composite modifier and 0.5 parts of antioxidant 1076 Continue to mix until it is uniform to prepare composite special materials. The composite special material is granulated by a twin-screw extruder with the temperature set at 180-220° C. to obtain composite special material particles. Extrude the prepared composite special material par...

Embodiment 3

[0037]A total of 100 parts of a mixture of high-density polyethylene (Mw = 147,000, distribution 5.35) and high-density polyethylene (HDPEMw = 210,000, distribution 4.2) (melt index 1.03g / 10min) and 20 parts of ground The mixture of machine-ground polyvinylidene fluoride and polyhexafluoropropylene (particle size ≥ 40 mesh, melt index 5.3g / 10min), 20 parts of zinc stearate lubricant were placed in a high-speed mixer and mixed evenly to prepare a composite modified sex agent. Put 100 parts of UHMWPE (viscosity average molecular weight of 1.52 million, molecular weight distribution width of 4.3) and 5 parts of polyethylene wax in a high-speed mixer and mix evenly, then add 20 parts of composite modifier, 0.5 parts of antioxidant 1010 The composite antioxidant with antioxidant PS802 (wherein the proportion of antioxidant 1010 is 50%) is placed in a high-speed mixer and mixed uniformly to obtain a composite special material. The composite special material is granulated by a twin-...

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Abstract

The invention relates to a composite material of an ultra-high molecular weight polyethylene film and a preparation method thereof. In the preparation process, the ultra-high molecular weight polyethylene is firstly modified with a composite modifier to obtain a composite special material; the prepared composite special material is passed through The twin-screw extruder is used for granulation; the obtained composite special material particles are extruded into thin sheets through the die on the single-screw extruder, and then the thin sheets are calendered by a multi-roller calender, and then wound into a film. Compared with the prior art, the present invention can realize the continuous molding of UHMWPE film, greatly improves production efficiency, reduces production cost, and does not need to use solvent, and is more environmentally friendly. At the same time, UHMWPE film also has excellent mechanical properties and can be used as a wear-resistant The layer lining is attached to the surface of other materials.

Description

technical field [0001] The invention relates to the field of advanced composite materials, in particular to a composite material of ultra-high molecular weight polyethylene film and a preparation method thereof. Background technique [0002] Ultra High Molecular Weight Polyethylene Fiber (UHMWPE for short) film is made of powdered UHMWPE resin with a molecular weight of 1 to 5 million or even higher. Now it mainly adopts wet or dry molding process using a large amount of solvents. Prepare. The film prepared by this method has the characteristics of being porous, melting and not collapsing, and can be used as a lithium battery separator or other permeable membranes. In recent years, it has developed rapidly due to the development of the new energy industry. However, the process of producing film by this method is complicated, and requires investment in expensive solvent recovery equipment and biaxial stretching equipment, resulting in high film prices, and the films produced...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L27/16C08L27/20C08L27/18C08L23/08C08K5/09C08K5/098C08K5/20C08J5/18
CPCC08J5/18C08J2323/06C08J2423/06C08J2423/08C08L23/06C08L2203/16C08L2205/025C08L2205/035C08L2207/062C08L2207/066C08L2207/068C08L27/16C08L27/20C08L27/18C08L23/0815C08K5/09C08K5/098C08K5/20
Inventor 赵文静李志冯玲英夏晋程沈贤婷洪尉
Owner SHANGHAI RES INST OF CHEM IND