Mitsui Petrochemical Industries, Ltd.

Shiro Honma

Hajime Inagaki

Takashi Izumi

Sakae Murakami

Yohzoh Yamamoto

Masayoshi Kurisu

Mutsuhiro Tanaka

Kenichi Tominari

Shinji Ohsato

A press-through packaging or blister package having excellent moisture-proofness, transparency, and superior processibility by vacuum or pneumatic forming, comprising of a formed product having blisters thereon prepared by forming a sheet or film of a non-stretched layer made from one or more non-crystalline polyolefin resins selected from the group consisting of

PTP or blister packaging articles and packaging material therefor

The laminate of the invention comprises a substrate and a resin surface layer having a glossiness of not less than 60% when measured at an incidence angle of 60.degree. laminated on at least one side surface of the substrate, and the substrate is formed from at least one cycloolefin polymer (A) selected from the group consisting of a random copolymer (a-1) of specific cycloolefin and ethylene, a ring opening polymer (a-2) of specific cycloolefin, a ring opening copolymer (a-3) of specific cycloolefin and a hydrogenation product (a-4) of the ring opening polymer or the ring opening copolymer, or formed from a cycloolefin resin composition (B) comprising the cycloolefin polymer (A) and crystalline polyolefin and/or an .alpha.-olefin elastomeric copolymer. The substrate shows excellent resistance to flon gas, so that the resin surface layer is effectively prevented from occurrence of cracks caused by influence of flon gas.

Laminate

According to the present invention, there is provided an improvement of a process for producing fluorine-containing copolymers comprising copolymerizing

Process for producing fluorine-containing copolymer and

An injection-molding polyethylene composition consisting essentially of ultrahigh-molecular-weight polyethylene having a molecular weight of at least about 1,650,000 and low-molecular-weight to high-molecular-weight polyethylene having a molecular weight of, for example, about 1500 to about 360,000. This composition is produced by a multistep polymerization process comprising a step of producing the ultrahigh-molecular-weight polyethylene and a step of producing the low-molecular-weight or high-molecular-weight polyethylene.

Injection-molding polyolefin composition

Disclosed is an aqueous dispersion comprising (i) a hydrophobic thermoplastic polymer, (ii) a water-insoluble thermoplastic polymer containing a carboxylic acid salt group bonded to the polymer chain at a concentration of 0.1 to 5 milliequivalents as --COO-- per gram of the polymer, (iii) water and, if necesssary, (iv) at least one member selected from the group consisting of anionic surface active agents, nonionic surface active agents, organic solvents and oils, said aqueous dispersion being apparently solid and having a water content of 0.5 to 3% by weight and an electric resistance lower than 10.sup.6 .OMEGA.-cm and also having such a property that when water is added to the dispersion, solids are uniformly dispersed as fine particles in the aqueous phase.

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Otake, Japan

Shiro Honma