Toyo Boseki Kabushiki Kaisha

Maki Matsuo

Katsuaki Kuze

Tsutomu Isaka

Hajime Suzuki

Osamu Makimura

Akito Hamano

Kunio Takeuchi

Yukinobu Miyazaki

Eiichi Nagayasu

A process for preparing a polyamide type film which comprises melt-extruding a polyamide resin having a metal compound and a melt specific resistance of not more than 1.5.times.10.sup.5 .OMEGA.cm at 260.degree. C. in a form of a film, contacting the melt-extruded film closely with a revolving cooling drum through static electricity and taking up the film while cooling rapidly to solidify, which provides remarkable improved adhesion by static electricity. As a result, increasing the take-up rate of the revolving cooling drum does not cause trapping of air between the drum and the film so that a film having excellent uniformity in thickness and transparency can be produced.

Process for preparing polyamide film

A packaging material having an excellent seal packaging property, which comprises (A) a base layer consisting of a stretched film made of a polymer composition comprising a propylene polymer and (B) a surface layer consisting of a stretched film made of a polymeric mixture comprising a polymer blend provided on at least one surface of said base layer, said polymer blend comprising a copolymer of ethylene and propylene and a copolymer of butene and any other polymerizable monomer having an ethylenic unsaturation in a weight proportion of 5:95 to 95:5.

Heat sealable laminated propylene polymer packaging material

Growing community of inventors

Inuyama, Japan

Maki Matsuo