The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 2004
Filed:
Jan. 13, 2003
Kazuyuki Watanabe, Oita, JP;
Takao Nasu, Oita, JP;
Showa Denko Plastic Products Co., Ltd., Tokyo, JP;
Abstract
The object of the present invention is to provide a layered film which exhibits, when used as a sealant film, excellent openability, good clouding property, high water vapor barrier property and superior seal strength stability and which is suitable as a medical packaging material, and to provide a packaging product thereof. The layered film comprises at least two layers of a resin composition layer [layer (A)] comprising (a) from 60 to 90% by mass of linear low-density polyethylene produced using a single site catalyst and (b) from 40 to 10% by mass of a polybutene-1, and a high-density polyethylene layer [layer (B)] comprising (c) a high-density polyethylene having a density of 0.950 to 0.970 (g/cm ). The packaging product has the layer (A) of the layered film as a sealant layer.