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Film layer

A film and polymer technology, applied in the direction of layered products, synthetic resin layered products, chemical instruments and methods, etc., can solve the problems of uneven final products, product quality problems, unsatisfactory melt processability in production, etc. , to achieve good optical performance, feasible haze value, excellent sealing effect

Active Publication Date: 2017-08-01
BOREALIS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unimodal PE polymers have e.g. good optical properties such as low haze, but e.g. melt processability of such polymers is not satisfactory in production and may also lead to quality problems in the final product
Multimodal PE polymers with more than two different polymer components can be processed better, e.g. melt homogenization of multimodal PE can be problematic, which leads e.g. to high gel contents in the final product Proven inhomogeneous final product

Method used

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example 1

[0296] Polymerization: Inventive Example 1: Inventive multimodal polymer of ethylene with 1-butene and 1-hexene comonomers

[0297] Pre-polymerization: Operating volume 50dm at temperature 60°C and pressure 65 bar 3 loop reactor. 2.5 kg / h ethylene, 30 kg / h propane diluent and 50 g / h 1-butene were introduced into the reactor. An instance of 16 g / h of catalyst was also introduced into the reactor. The polymer production rate is about 2 kg / h.

[0298] polymerization:

[0299] The slurry from the reactor was withdrawn intermittently and introduced into a volume of 500 dm 3 in a loop reactor and operated at a temperature of 85 °C and a pressure of 64 bar. Further, 25 kg / h of propane and ethylene and 1-butene comonomer and hydrogen were added to the reactor so that the ethylene content in the reaction mixture was 4 mol%, and the molar ratio of hydrogen to ethylene was 0.3 mol / kmol, 1- The ratio of butene to ethylene was 110 mol / kmol. Melt index MFR 2 6g / 10min, density 938kg / ...

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Abstract

The present invention relates to a film comprising at least one layer which comprises a polymer composition comprising (a) a multimodal polymer of ethylene.

Description

technical field [0001] The present invention relates to a film layer comprising a polymer composition comprising a multimodal polymer of ethylene. Background technique [0002] Typically unimodal polyethylene (PE) polymers such as SSC products are used for film applications. Unimodal PE polymers have, for example, good optical properties, such as low haze, but the melt processability of such polymers, for example, is unsatisfactory in production and may also lead to quality problems in the final product. Multimodal PE polymers with more than two different polymer components can be processed better, e.g. melt homogenization of multimodal PE can be problematic, which leads e.g. to high gel contents in the final product Proven inhomogeneous final product. [0003] EP1472298A to Borealis discloses a multimodal PE polymer composition with two different comonomers. Multimodal PE polymers are polymerized in the presence of metallocene catalysts. The examples disclose multimodal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/32C08J5/18
CPCB32B27/08B32B27/32B32B27/327C08J5/18B32B2250/05B32B2250/242B32B2307/30B32B2307/54B32B2270/00C08J2323/08C08F210/16C08F2/001C08F4/65925C08F4/65912C08F4/65916C08F210/14C08F210/08C08F2500/12C08F2/38C08F10/02C08F210/02C08F2500/18C08F2500/26C08F2500/06
Inventor 亚尔莫·凯拉彼得·尼得苏斯扎里·艾艾日莱玛库·瓦哈特日弗朗瑞恩·普拉德约翰·杰米逊威廉·德·韦维尔
Owner BOREALIS AG
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