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Composition suitable for thermoformable sheets and articles made therefrom

A molding board and thermoforming technology, applied in the field of thermoplastic compositions, can solve the problems of inability to provide stiffness, toughness and optical properties

Inactive Publication Date: 2011-11-02
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While polypropylene solutions can provide acceptable stiffness and toughness when used with appropriate impact modifiers, they often do not provide the balance of stiffness, toughness and optical properties required for many applications

Method used

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  • Composition suitable for thermoformable sheets and articles made therefrom
  • Composition suitable for thermoformable sheets and articles made therefrom
  • Composition suitable for thermoformable sheets and articles made therefrom

Examples

Experimental program
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Embodiment 1-4

[0118] Table 1

[0119]

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Abstract

The invention relates to a composition suitable for the thermoformable sheets and the articles made therefrom. Thermoformable sheet having a thickness of at least 300 micrometers comprises a blend of: (A) from 5 to 20% by weight of a propylene-ethylene copolymer having substantially isotactic propylene sequences, the substantially isotactic propylene sequences having an isotactic triad (mm) measured by <13>C NMR of greater than about 0.85, and the propylene-ethylene copolymer having a melt flow rate from 4 to 30 g / 10 min and comprising at least 70% by weight units derived from propylene and from about 10 to 20% by weight units derived from ethylene; and (B) from 80 to 95% by weight of a propylene homopolymer with a high crystallinity or a propylene series copolymer having at most 1% by weight of a unit derived from the alpha-olefin comonomer. The propylene homopolymer with the high crystallinity or the propylene series copolymer has a melt flow rate of from 2 to 8 grams / 10 minutes, and has less than 2.0% by weight of xylene soluble substance.

Description

[0001] This application is a Chinese patent application No. PCT / US2005 / 031278 with an international filing date of August 31, 2005, and a Chinese patent application titled "composition suitable for thermoformable sheets and products made therefrom". Divisional application of .200580036783.8. technical field [0002] The present invention relates to thermoplastic compositions suitable for use in the manufacture of thermoformed articles exhibiting good optical properties, toughness and stiffness. Furthermore, the invention relates to boards comprising the composition of the invention. Furthermore, the invention relates to thermoformed articles, preferably perishable food products, such as trays for meat and fish, comprising the composition of the invention. Background technique [0003] The packaging industry uses thermoformed trays to hold a variety of perishable food products. One of the biggest uses of these types of trays is to hold fresh meat. In the past, local packer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L23/16B65D19/24B29C48/07
CPCC08L23/08B29K2105/256B29C47/0021B29L2031/712B29K2995/0067B29C51/08B29K2023/12C08L23/10C08L23/12B29K2995/0082B29C51/002B29C47/14B29K2995/0089B29C48/08B29C48/305Y10T428/1352Y10T428/31938Y10T428/31913B29C48/07C08L2666/06
Inventor A·罗泽尔-乌里斯E·托里斯O·亨斯克
Owner DOW GLOBAL TECH LLC