Title:
POLYOLEFIN FILM
Document Type and Number:
WIPO Patent Application WO/2013/065578
Kind Code:
A1
Abstract:
The present invention addresses the problem of obtaining a self-adhesive surface-protecting film that is highly processing-friendly, and despite adhering to the protected object strongly and being usable on a variety of objects, is not prone to problems such as localized stretching or deformation when unrolled from being stored rolled up. The present invention relates to a polyolefin film characterized by comprising an adhesive layer laminated to one surface of a polypropylene-resin base layer and a release layer laminated to the opposite surface via co-extrusion. This polyolefin film is further characterized in that: the resins constituting the adhesive layer include, at least, a styrene elastomer (consisting primarily of: a block copolymer consisting of styrene-polymer blocks and olefin-polymer blocks; a block copolymer consisting of styrene-polymer blocks and styrene/olefin random-copolymer blocks; and/or hydrogenated versions thereof) and a polyolefin resin; said polyolefin resin constitutes 5-25% of the total weight of the resin components constituting the adhesive layer; the resins constituting the release layer include, at least, a polypropylene resin and a C4+ alpha-olefin (co)polymer; and said C4+ alpha-olefin (co)polymer constitutes at least 5% but less than 25% of the total weight of the resin components constituting the release layer.
Inventors:
YAMAMOTO SHIGETOMO (JP)
OKI HIROKAZU (JP)
TAGA ATSUSHI (JP)
OKI HIROKAZU (JP)
TAGA ATSUSHI (JP)
Application Number:
PCT/JP2012/077619
Publication Date:
May 10, 2013
Filing Date:
October 25, 2012
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
C09J7/02; B32B27/00; B32B27/30; C09J125/04; C09J153/00; C09K3/00
Domestic Patent References:
| WO2008149708A1 | 2008-12-11 |
Foreign References:
| JP2004162048A | 2004-06-10 | |||
| JP2010077339A | 2010-04-08 | |||
| JP2007126569A | 2007-05-24 | |||
| JPH05194923A | 1993-08-03 | |||
| JP2011042761A | 2011-03-03 |
Attorney, Agent or Firm:
UEKI, Kyuichi et al. (JP)
Hisakazu Ueki (JP)
Hisakazu Ueki (JP)
Download PDF:
Claims: