Stock material or miscellaneous articles – Structurally defined web or sheet – Including components having same physical characteristic in...
Patent
1986-03-05
1988-03-29
Kittle, John E.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including components having same physical characteristic in...
428349, 428447, 428451, 428516, 26421112, 53396, B32B 2708, B29C 4516, B65B 1100
Patent
active
047343176
ABSTRACT:
A polyolefin film having a base layer composed essentially of propylene polymers and having sealing layers present on both sides, composed essentially of sealable olefin polymers. Polydialkylsiloxane is incorporated in a first of the two sealing layers, and this layer is not subjected to corona treatment. The second sealing layer is subjected to corona treatment and has polydialkylsiloxane, not incorporated, but present on its outer surface, the polydialkylsiloxane having been transferred to this layer by contact with the sealing layer in which polyidalkylsiloxane is incorporated. The relative polydialkylsiloxane occupancy on the second layer, which is determined by means of ESCA spectroscopy, is not more than 15. The three-layer polyolefin film is prepared by a coextrusion process. It is particularly suitable for use as a packaging film on high-speed packaging machines.
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Bothe Lothar
Crass Guenther
Hoechst Aktiengesellschaft
Kittle John E.
Seidleck James J.
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