Kureha Kagaku Kogyo Kabushiki Kaisha

Mitsuo Onozuka

Koki Nomoto

Shigeru Saitoh

Shinsuke Yoshikawa

Kiichi Endo

Masahiro Segawa

Koji Sato

Ichiroh Ishibashi

Yoshiaki Adachi

Yasuo Hayashi

A pervious sheet of a polyolefin composition containing 50-85 wt.% of an inorganic material such as calcium sulfite is disclosed. The calcium sulfite is preferably employed in the form of the crystalline semi-hydrate, with the crystals being in the rectangular form having a short axis of 1-30 .mu. and a long axis of 5-100 .mu.. Also disclosed is a method for the manufacture of these compositions.

Stretched molding composed of calcium sulfite-containing polyethylene

A melt-molded polyvinylidene fluoride or polymonochlorotrifluoroethylene sheet having a thickness of about 20 .mu. to 2 mm and a spherulite size of less than about 10 .mu., whereby the sheet transmits more than about 40% of the dorno rays in a wavelength region of about 2,800 to 3,300 A, and a sun room using as a light admitting plate a sheet or plate of the polyvinylidene fluoride or the polymonochlorotrifluoroethylene permitting transmission of the physiologically active rays in sunlight.

Dorno ray transmitting sheet

In an article to be used in or under water and in constant contact with the water, at least the surface of the article is composed of an anti-fouling composition which comprises a polymer and an organo tin compound of the formula: ##STR1## wherein R.sub.1 is n-dodecyl and R.sub.2 and R.sub.3 are methyl. X is defined in the specification.

Anti-fouling composition for use in water comprising a polymer and an

A composition for forming into a soft, pliable, leather-like material includes a polyolefine having from 50 to 90 weight percent of inorganic compounds. The inorganic compounds contain a substantial amount of calcium sulfite having crystal sizes of 1-100 .mu..

Growing community of inventors

Iwaki, Japan

Mitsuo Onozuka