THERMOPLASTIC RESIN FILM AND PROCESS FOR PRODUCING THE SAME

Title:

THERMOPLASTIC RESIN FILM AND PROCESS FOR PRODUCING THE SAME

Document Type and Number:

WIPO Patent Application WO/2003/055937

Kind Code:

A1

Abstract:

A heat-shrinkable resin film which has a heat shrinkage in the maximum shrinkage direction of 20% or higher when a 10 cm by 10 cm square sample cut out thereof is immersed in 85°C water for 10 seconds, pulled out, subsequently immersed in 25°C water for 10 seconds, and then pulled out, characterized in that the content of nitrogen atoms in a film surface is 0.1 to 3.0% and the film surface has a wet tension of 36 mN/m or higher; and a film roll obtained by winding up the heat-shrinkable resin film, characterized in that when the rolled film is sampled at a first sampling part located up to 2 m apart from the end of the rolled film and at other sampling parts located after the first sampling part at intervals of about 100 m and the average nitrogen content of each sample is calculated, then the nitrogen content of each sample is within the ±0.8% range based on that average nitrogen content.

Inventors:

HAYAKAWA SATOSHI (JP)
TABOTA NORIMI (JP)
NAGANO HIROSHI (JP)

Application Number:

PCT/JP2002/013577

Publication Date:

July 10, 2003

Filing Date:

December 26, 2002

Export Citation:

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Assignee:

TOYO BOSEKI (JP)
HAYAKAWA SATOSHI (JP)
TABOTA NORIMI (JP)
NAGANO HIROSHI (JP)

International Classes:

B29C59/12; B29C59/14; B29C61/00; B29D7/01; C08J5/18; B41M5/00; (IPC1-7): C08J5/18; C08J7/00; B29C61/02

Domestic Patent References:

WO1994004601A1

1994-03-03

Foreign References:

JP2001096616A	2001-04-10
JP2001058377A	2001-03-06
JP2001295051A	2001-10-26
JPS60240434A	1985-11-29
EP0127149A2	1984-12-05
JPH048736A	1992-01-13
JP2001233971A	2001-08-28
JP2000195765A	2000-07-14
JPS60203653A	1985-10-15

Other References: