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Highly-transparent polyethylene composition and preparation method thereof

A technology of polyethylene and composition, applied in the field of high-transparency polyethylene composition and preparation thereof, can solve the problems of insufficient heat aging resistance, tear resistance and anti-drop impact strength, etc., and achieve excellent mechanical properties and optical properties. performance, overcoming metallocene processing difficulties, and the effect of simple methods

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the resin used more as a raw material for composite packaging film is a blend of LDPE and LLDPE. The composite packaging film prepared with the above composition has good comprehensive performance in terms of flexibility and processing performance, but it is not suitable for heat aging resistance. There are still deficiencies in performance, tear resistance, drop impact strength, etc.

Method used

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  • Highly-transparent polyethylene composition and preparation method thereof
  • Highly-transparent polyethylene composition and preparation method thereof
  • Highly-transparent polyethylene composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1、2、5、6

[0043] Component a: hexene copolymerized linear low density polyethylene prepared by metallocene catalyst, melt mass flow rate (190°C, 2.16Kg) 1.0g / 10min, density 0.9200g / cm 3 , the comonomer mole percentage is 2.53%, the degree of branching is 111.4 / 10000C, the terminal methyl group is 128.3 / 10000C, the molecular weight distribution breadth index is 3.08, and the weight average molecular weight is 123,500.

[0044] Component b: hexene copolymerized linear low density polyethylene prepared by metallocene catalyst, melt mass flow rate (190°C, 2.16Kg) 10g / 10min, density 0.9122g / cm 3 , the comonomer mole percentage is 3.25%, the branching degree is 21.1 / 10000C, the terminal methyl group is 133.8 / 10000C, the resin melting temperature is 101.3°C and 113.4°C, the weight average molecular weight is 110,000, and the molecular weight distribution width index is 3.8.

[0045] Component c: Qilu company product 2102TN00, density 0.919g / cm 3 , Melt mass flow rate (190°C, 2.16Kg) 2.0g / 10mi...

Embodiment 3

[0048] Component a: Metallocene linear low density polyethylene 1018CA (ExxonMobil Chemical Co., Ltd.), density 0.918g / cm 3 , Melt mass flow rate (190°C, 2.16Kg) 1.0g / 10min.

[0049] Component b: hexene copolymerized linear low density polyethylene prepared by metallocene catalyst, melt mass flow rate (190°C, 2.16Kg) 10g / 10min, density 0.9122g / cm 3 , the comonomer mole percentage is 3.25%, the branching degree is 21.1 / 10000C, the terminal methyl group is 133.8 / 10000C, the resin melting temperature is 101.3°C and 113.4°C, the weight average molecular weight is 110,000, and the molecular weight distribution width index is 3.8.

[0050] Component c: Qilu company product 7042, density 0.920g / cm 3 , Melt mass flow rate (190°C, 2.16Kg) 2.0g / 10min, weight average molecular weight 100,000, molecular weight distribution breadth index 4.5.

[0051] Component d: Tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]pentaerythritol ester is used as antioxidant, the dosage is 0.03 par...

Embodiment 4

[0053] Component a: hexene copolymerized linear low density polyethylene prepared by metallocene catalyst, melt mass flow rate (190°C, 2.16Kg) 1.0g / 10min, density 0.9201g / cm 3 , the comonomer mole percentage is 2.53%, the degree of branching is 111.4 / 10000C, the terminal methyl group is 128.3 / 10000C, the molecular weight distribution breadth index is 3.08, and the weight average molecular weight is 123,500.

[0054] Component b: hexene copolymerized linear low density polyethylene prepared by metallocene catalyst, melt mass flow rate (190°C, 2.16Kg) 10g / 10min, density 0.9122g / cm 3 , the comonomer mole percentage is 3.25%, the branching degree is 21.1 / 10000C, the terminal methyl group is 133.8 / 10000C, the resin melting temperature is 101.3°C and 113.4°C, the weight average molecular weight is 110,000, and the molecular weight distribution width index is 3.8.

[0055] Component c: 2102TN26, the product of Qilu Company, with a density of 0.918g / cm 3 , Melt mass flow rate (190°C,...

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Abstract

The invention relates to a polyethylene composition, specifically to a highly-transparent polyethylene composition and a preparation method thereof. The highly-transparent polyethylene composition comprises a matrix resin and a processing auxiliary agent, wherein the matrix resin is prepared by co-mixing first mLLDPE, second mLLDPE and high pressure LDPE. The composition has characteristics of good strength, good flexibility, good processability, good aging resistance, low odor, excellent gloss, excellent impact strength, excellent tensile strength and excellent tear strength, can be used for preparing composite package films with excellent comprehensive performances, and can be provided for avoiding phenomena such as scratch, puncture and breaking by external force due to insufficient performances such as tear resistance and the like during the use process. In addition, after the mLLDPE resin and the normal resin are blended, the thickness of the film is reduced, the comprehensive performance is excellent, the product cost is reduced, and the processability of the composition is improved.

Description

technical field [0001] The invention relates to a polyethylene composition, in particular to a highly transparent polyethylene composition and a preparation method thereof. Background technique [0002] Due to its good comprehensive properties such as flexibility, transparency and processability, polyethylene is widely used in the preparation of various film materials, such as food packaging films and non-food packaging films. With the development of society and science and technology, the requirements for the comprehensive performance of polyethylene film are getting higher and higher. The development trend of food packaging film is to adopt high-grade and complex structure, and at the same time, it can prolong the life of food on the shelf and make it as thin as possible; non-food packaging needs to use tougher materials and make it thinner . It is required that the raw materials for the preparation of composite packaging films have high strength, good transparency, flex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08K13/02C08K5/134C08K5/526C08K3/36C08K5/20B29C47/92B29B9/06B29C48/92
CPCB29B9/06B29C48/92B29C2948/92704C08L23/0815C08L2201/10C08L2203/16C08L2205/025C08L2205/03C08L2207/066C08L23/06C08K5/1345C08K3/36C08K5/20C08K5/526B29C48/04B29C48/40B29C48/625B29C2948/92514B29C2948/9259B29C2948/92647B29C2948/92885B29C2948/92895
Inventor 许平王群涛郭锐王日辉高凌雁
Owner CHINA PETROLEUM & CHEM CORP
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