Polyethylene composition and preparation method thereof

A technology of polyethylene and composition is applied in the field of polyethylene composition for preparing breathable film and its preparation, and achieves the effects of stable performance, good compatibility and uniform distribution

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional production process, surfactants are often used to treat inorganic fillers to increase their compatibility with the matrix. At the same time, dispersants are added to solve the dispersion problem of inorganic fillers, but the dispersion effect needs to be further improved.

Method used

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  • Polyethylene composition and preparation method thereof
  • Polyethylene composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 50 parts of calcium carbonate with a particle size of 1-10 microns into the high-speed mixer, set the temperature at 110-120°C, stir at high speed for 10 minutes, add 0.5 parts of titanate coupling agent and continue stirring at high speed for 10 minutes; then , add 0.5 parts of dispersant polyethylene wax, stir at high speed for 10 minutes; finally, add 7.5 parts of linear low density polyethylene with a melting index of 0.1g / 10min, 27.5 parts of linear low density polyethylene with a melting index of 2g / 10min, melt Refers to 15 parts of 40g / 10min linear low-density polyethylene, mixed evenly at a low speed, added to a twin-screw extruder, melted and blended, extruded, and granulated to obtain a polyethylene composition. The polyethylene composition is cast and stretched to obtain a breathable film product, which can be widely used in the fields of disposable hygiene products, waterproof and moisture-permeable materials, and the like. The weight fraction of each co...

Embodiment 2

[0031]Add 50 parts of calcium carbonate with a particle size of 1-10 microns into the high-speed mixer, set the temperature at 110-120°C, stir at high speed for 10 minutes, add 0.5 parts of titanate coupling agent and continue stirring at high speed for 10 minutes; then , add 0.5 parts of dispersant polyethylene wax, stir at high speed for 10 minutes; finally, add 7.5 parts of linear low density polyethylene with a melting index of 0.1g / 10min, and add 7.5 parts of linear low density polyethylene with a melting index of 1g / 10min. 27.5 parts, 15 parts of linear low-density polyethylene with a melt index of 40 g / 10 min, mixed evenly at a low speed, added to a twin-screw extruder, melted and blended, extruded, and granulated to obtain a polyethylene composition. The polyethylene composition is cast and stretched to obtain a breathable film product. The weight fraction of each component in the polyethylene composition is shown in Table 1, and the performance of the breathable film ...

Embodiment 3

[0034] Add 30 parts of calcium carbonate with a particle size of 1-10 microns and 20 parts of calcium carbonate with a particle size of 0.2-0.5 microns into a high-speed mixer, set the temperature at 110-120°C, stir at high speed for 10 minutes, and then add 0.5 parts of titanate The coupling agent continues to stir at high speed for 10 minutes; then, add 0.5 parts of dispersant polyethylene wax, and stir at high speed for 10 minutes; finally, add 7.5 parts of linear low density polyethylene with a melt index of 0.1g / 10min, and a melt index of 2g / 10min 27.5 parts of linear low density polyethylene, 15 parts of linear low density polyethylene with a melt index of 40g / 10min, mixed evenly at a low speed and then added to a twin-screw extruder, extruded and pelletized after melt blending to obtain poly vinyl composition. The polyethylene composition is cast and stretched to obtain a breathable film product. The weight fraction of each component in the polyethylene composition is ...

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Abstract

The invention provides a polyethylene composition and a preparation method thereof. The polyethylene composition comprises a polyethylene blend, inorganic filler, a coupling agent, a dispersant and fully-vulcanized powder rubber and is used for preparing film materials such as waterproof gas-permeable film. The polyethylene blend comprises three linear low-density polyethylene with different melt indexes so as to ensure the performance of the waterproof gas-permeable film and the nano-scale fully-vulcanized powder rubber can have the effect of promoting the dispersion of the inorganic filler. The waterproof gas-permeable film is prepared from the polyethylene composition by casting and stretching, under the condition that the mechanical strength is ensured to be not reduced, the processing performance of the gas-permeable film can be significantly improved, the adjustable ranges of physical performance and permeability are large and the gas-permeable film has the advantages of wider adaptability, uniform micropores, low cost and high cost-performance ratio.

Description

technical field [0001] The invention relates to the field of modified plastic processing, in particular to a polyethylene composition for preparing a breathable film and a preparation method thereof. Background technique [0002] Breathable film is a composite material based on thermoplastics and filled with high content of inorganic particles. It is made into a film by calendering, casting, blow molding, etc., and then further stretched by uniaxial or biaxial to obtain a small pore size. Through the microporous film material, the film can only pass through the water vapor molecules with a small molecular structure, but cannot allow the water droplets in the aggregated state to penetrate through, so it has the characteristics of air permeability and impermeability, so as to achieve the effect of waterproof and moisture permeability . [0003] Theoretically, thermoplastics can be used as the matrix resin of breathable membrane materials. Because polyethylene has the characte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08L83/04C08K9/06C08K9/04C08K3/26C08K5/20B29C55/02
CPCC08J5/18C08J2323/08C08K2201/003C08K2201/014C08L23/0815C08L2203/16C08L2205/025C08L2205/03C08L2205/035C08L2314/02C08L2314/06C08L23/06C08K9/04C08K2003/265C08L83/04C08K5/20C08K9/06
Inventor 初立秋张师军李杰权慧刘建叶张丽英邵静波白弈青
Owner CHINA PETROLEUM & CHEM CORP
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