US 6,632,521 B2Granted

Polymeric films and packages produced therefrom

AssigneeRexam Medical Packaging Inc.

InventorsRoy Christopherson, David Thomas Stell

Life of this patent

Estimating the term…

Abstract

Polymeric films having at least one outer layer consisting of a blend of low density polyethylene and a poly-(alkylstyrene) can be heat sealed to non-woven webs such as paper to produce peel openable packages, for example for medical equipment. Such packages can be peeled open with low fiber lift from the non-woven webs.

Claims18

Dependent claims

A polymeric film having at least one outer layer comprising a blend of low density polyethylene and poly-(α-methylstyrene).

Dependencies are inferred from the claim text.

Facts

Application: 09/875,936Filed 8 Jun 2001
Priority: GB 001582229 Jun 2000
Published: US 2002/0016116 A17 Feb 2002
Granted: 14 Oct 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification21 codes

C08J 5/18
Manufacture of articles or shaped materials containing macromolecular substances: manufacture of films or sheets
B32B 27/06
Layered products comprising a layer of synthetic resin: as the main or only constituent of a layer, which is next to another layer of the same or…
B32B 27/32
Layered products comprising a layer of synthetic resin: comprising polyolefins
C08L 23/0815
With unsaturated hydrocarbons only containing four or more carbon atoms: with aliphatic 1-olefins containing one carbon-to-carbon double bond

Family

US 2002/0016116 A1Pre-grant publication · published 7 Feb 2002
US 6,632,521 B2This patent

From the US filing history. Foreign family members aren’t listed.

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