Matte biaxially oriented polypropylene film with improved matte property and processability
AssigneeSK Corporation
InventorsJang-Weon Rhee, Tae-Keun Lee, Soo-Hyun Cho
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Abstract
Disclosed is a matte biaxially oriented polypropylene film having improved matte characteristic and processability. The film comprises one or more surface layers made of a composition comprising 100 parts by weight of a resin blend of 40-60 wt % of polyethylene (I) and 60-40 wt % of polypropylene (II), 0.005-0.04 parts by weight of a peroxide (III) and 0.1-0.5 parts by weight of a fluoroelastomer or a metal stearate (IV). The matte biaxially oriented film has low gloss (45°, <10%) and high haze (>70%), and solves problems related to increase of silver (or bright) spots and roughness of a matte pattern, and a shortened die cleaning cycle due to die build-up.
Claims9
A matte biaxially oriented polypropylene film, comprising at least one matte surface layer made of a composition comprising 100 parts by weight of a resin blend of (I) 40-60 wt % of polyethylene and (II) 60-40 wt % of polypropylene, (III) 0.005-0.04 parts by weight of a peroxide and (IV) 0.1-0.5 parts by weight of a fluoroelastomer or a metal stearate,
- wherein the component I is composed of a copolymer of ethylene and α-olefin containing 3-8 carbons, the copolymer having density of 0.945 g/cm3 (ASTM D 1505) or more;
- and the component II is composed of ethylene-propylene, butene-1-polypropylene, or ethylene-butene-1-propylene copolymer, the content of ethylene, butene-1 or combination thereof being 1-5 wt % based on the component II.
Dependencies are inferred from the claim text.