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Enhanced stretched cling performance polyolefin films

A technology of polyolefins and olefins, applied in the field of polyethylene-based films, can solve the problems of soft polyolefins sticking, sticking performance is trapped in dusty or low temperature environments, and does not improve sticking performance

Inactive Publication Date: 2016-06-01
EXXONMOBIL CHEM PAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, soft polyolefins may cause sticking
In other words, after a certain concentration, adding more soft polyolefin does not improve the cling performance and may lead to other undesirable film properties such as blocking
Additionally, adhesion properties may be particularly troubled by dusty or low temperature environments

Method used

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  • Enhanced stretched cling performance polyolefin films
  • Enhanced stretched cling performance polyolefin films
  • Enhanced stretched cling performance polyolefin films

Examples

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Embodiment

[0097] Exemplary inventive films are made from ethylene-based polymers (or "αPE") prepared and described in U.S.S.N. 61 / 823,039, filed March 14, 2013, with Attorney Docket No. US 6,090,740 is cited again for the synthesis of the inventive ethylene-based polymers used. The ethylene-based polymers of the present invention as used herein are metallocene-catalyzed copolymers of ethylene and 1-hexene derived units prepared by a gas phase process which, under specific polymerization conditions, gave 10min melt index (I 2 ) and I of 125-130g / 10min 21 Income I with 16-17 21 / I 2 The linear low density (0.918g / cm 3 ) polyethylene. The ethylene-based polymer had a MWD (Mw / Mn) of 3.0 (±0.2).

[0098] Films of the present invention were produced on a commercial casting line running at a nominal 900 fpm line speed. A multilayer film is prepared having a polyolefin inner layer (primarily LLDPE resin) with an LLDPE core and a polyolefin sublayer between the inventive cling layer and t...

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Abstract

A stretch cling film having Cling Retention greater than 50% comprising a cling layer comprising an ethylene-based polymer wherein the film Parallel Cling Force at 200% is greater than 50g. More particularly is disclosed a multilayered stretch cling film having Cling Retention greater than 50%, wherein the film comprises a cling layer comprising an ethylene-based polymer having (a) a melt index I2 within the range 5.0 to 25.0 g / 10 min, (b) a melt index ratio, I21 / I2 within the range of 9.0 to 40.0, and (c) a density within the range from 0.910 to 0.930 g / cm3. The cling layer may also include a propylene-based elastomer, polyalphaolefin, or a combination thereof.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 61 / 891,589, filed October 16, 2013, the disclosure of which is incorporated by reference in its entirety. technical field [0003] The present invention relates to stretchable cling films, especially polyethylene-based films, having improved cling properties. Background technique [0004] Stretch-adhesive films have a wide variety of applications, including bale food and other merchandise. One application of particular interest is bundling merchandise for shipping and storage, for example, bundling large rolls of carpet, fabric, and the like. A film having cling properties to prevent unraveling of the film from the pallet is therefore desirable. In order to impart cling properties or to improve the cling properties of a particular film, many techniques have been employed, such as the addition of tackifying additives or the use of polar ethylene cop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32C08J5/18
CPCB32B27/08B32B27/18B32B27/32B32B2250/242B32B2270/00B32B2274/00B32B2307/50B32B2307/54B32B2307/558B32B2307/5825B32B2553/00C08J5/18C08J2323/08C08J2423/08C08J2423/14B32B2307/72B32B2307/748
Inventor P·M·戈尔曼
Owner EXXONMOBIL CHEM PAT INC