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Coating polypropylene composition and preparation method thereof

A polypropylene composition and polypropylene technology, which are applied in the field of plastic packaging, can solve the problems of lowering the heat-sealing temperature of the coating film, and the strength of the coating film does not show advantages, etc., and achieve fast heat-sealing speed, stable processing and production, and heat-sealing. high intensity effect

Inactive Publication Date: 2018-11-13
CHINA PETROLEUM & CHEM CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the literature "Research on Coated Polypropylene of Copolymerization Grade" written by Huang Cheng et al., the method of blending random copolymerized polypropylene and LDPE was used to reduce the heat sealing temperature of the coating film, but the strength of the coating film no advantages indicated

Method used

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  • Coating polypropylene composition and preparation method thereof
  • Coating polypropylene composition and preparation method thereof
  • Coating polypropylene composition and preparation method thereof

Examples

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Embodiment Construction

[0019] The present invention will be further described below through embodiment.

[0020] See Table 1 for the raw material composition of Examples 1-3, and see Table 1 for the processing and performance of the present invention coated on BOPP film.

[0021] The molecular weight distribution of the random copolymerized polypropylene used is 3.8, the MFR is 31 g / 10min, and the amount of comonomer ethylene is 4.2%; the MFR of the metallocene polyethylene used is 1.8 g / 10min, and the molecular weight distribution is 3.6. The preparation method is as follows: firstly mix the random copolymerized polypropylene and the auxiliary agent system, then extrude and granulate, then mix it with metallocene polyethylene evenly, and then extrude and granulate through twin-screw to obtain the coated polypropylene combination described in the invention thing.

[0022] Judging from the effects of the examples, the present invention greatly improves the coating processing speed, coating uniformit...

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Abstract

The invention belongs to the technical field of plastic packing, and particularly relates to a coating polypropylene composition and a preparation method thereof. The coating polypropylene compositioncomprises polypropylene randon copolymer, metallocene polyethylene and an auxiliary system. By selection of the ethylene-propylene polypropylene randon copolymer with high ethylene content and low molecular weight distribution and the metallocene polyethylene with low molecular weight distribution and low density and by improvement of a preparaiton process of the coating polypropylene composition, a two-step preparation process of mixing and granulating polypropylene at first and then mixing and granulating polyethylene is adopted, thus, the coating polypropylene composition has the advantages of good sanitation, high heat sealing strength, low heat sealing temperature, high heat sealing speed, high coating processing speed, stable processing and production, thin and uniform coating, lowodor and the like, and is widely applied to the field of high-requirement food packing and the like, and the production efficiency and product quality are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of plastic packaging, and in particular relates to a coating polypropylene composition and a preparation method thereof. Background technique [0002] Polypropylene is coated and compounded on the surface of kraft paper, woven bags, plastic films, pipes and other products to form a uniform layer of protective film, which can make it seal, prevent corrosion, and improve heat sealing when packaging items or conveying fluids. Strength and mechanical strength of the packaging layer. Compared with the traditional double-layer packaging, the application of polypropylene coating has the advantages of saving raw materials, simplifying the operation process, reducing the damage of packaging bags, better protecting the hygiene of the packaged products, and extending the storage period. It is the current packaging field. The application trend has an irreplaceable role. [0003] Coating grade polypropylene is mainly u...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08L23/06C08K5/00C08K5/098C08K5/103
CPCC08L23/14C08L2203/16C08L23/06C08K5/00C08K5/098C08K5/103
Inventor 李丽陈智能唐岩李延亮苑东兴裴小静王秀丽陈华赉明月黄峰
Owner CHINA PETROLEUM & CHEM CORP
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