Mitsubishi Rayon Company, Limited

Mitsubishi Acetate Co., Ltd

Naoki Mochida

Hiroshi Sato

Munetsugu Nakatani

Takashi Sakai

Kazuhiko Morifuji

Shuichi Sugimori

Hiroshi Nakatsui

Hiroaki Sawada

Hideto Kakita

Hiroyuki Shimoyama

A process for producing a cellulose acetate molding material which comprises dissolving cellulose diacetate in a mixed solvent of acetone and water to prepare a dope and then spinning or film forming the dope, wherein at least one compound selected from the group consisting of water-soluble salts and bases is added to the water to be used in preparation of the dope.

Process for production of cellulose acetate molding materials

A method for manufacturing cigarette filters which have a well-stabilized shape in which acetate fibrous tows impregnated with carboxylic acid ester of polyol are formed into a predetermined shape, uniformly impregnated with water, and irradiated with microwave energy. Water is used during the application of microwave energy to enhance the absorption of microwave energy and hence heating of the filter. This causes the carboxylic acid ester of polyol to very rapidly disperse causing it to permeate into the acetate fiber to rapidly complete the stabilization and solidification of the filter.

Method for manufacturing cigarette filters

An oil-adsorbing composition useful for removing oil from oil-contaminated water comprises a granulated mixture of 5-80 weight % of an inorganic filler capable of adsorbing oil and 95-20 weight % of a cross-linked polymer. The composition is melt-kneaded by mixing and crushing the ingredients while cross-linking the polymer.

Method of producing of treating material for oil-containing waste water

A translucent polypropylene film containing no .beta.-type crystallization nucleating agent which has, on at least one side, a surface layer composed of a two- or three-dimensional network structure, in which at least 1,000 network elements constituting the said network structure are present per cm.sup.2 of the film surface. The said film is obtained in such a manner that an unstretched polypropylene film having, on at least one side, a surface layer having a K value, which represents the amount of .beta.-type crystals present at a portion from the surface to a thickness of 10% in the thick-wall direction, of at least 0.1 is biaxially stretched under such conditions that the stretching temperature at the stretch initiation point is in the range of 145.degree. to 176.degree. C. and the stretch ratio in one direction is less than 8 times. The above-mentioned film is excellent in mechanical properties, quite dense in inner structure and high in airtightness, and the surface thereof has a fine uneven structure or fibril-like network structure, and has a favorable haze. Accordingly, the said film is used as a film for packing medicines, hygienic materials and foods, and as an insulating oil-impregnated dielectric film for condensers.

Translucent polypropylene film and process for producing the same

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Toyama, Japan

Naoki Mochida