Mitsubishi Rayon Company, Limited

Chemitech, Inc.

Yoshishige Shimizu

Hideo Sakakura

Hiroshi Yamamoto

Atsushi Ogura

Kaoru Hirata

Eiji Kishita

Ken Ogasawara

Daiji Goto

Makoto Sasaki

Jun Yoshida

Kiyoshi Akazawa

A flame retarding polypropylene fiber and flame retarding polypropylene film having both good flame retardancy and good fiber strength and film strength, and generating no toxic gas, and a production method thereof are provided. 0.5 to 3.0% by weight of a NOR type hindered amine-based stabilizer and 0.5 to 3.0% by weight of a phosphoric ester-based flame retardant are mixed with a polypropylene resin having a melt flow rate value of 5 to 50 g/10 min., the mixture is spun to form an unstretched yarn, and then the yarn is stretched at a stretching magnification of 2 to 7-fold and a stretching temperature of 50 to 100&#xb0; C., and further set thermally at a temperature of 60 to 140&#xb0; C. Since the flame retarding polypropylene fiber obtained contains the above-mentioned range of the NOR type hindered amine-based stabilizer and the phosphoric ester-based flame retardant, it has both adequate fiber strength and good flame retardancy. And a flame retardant polypropylene film containing the above-mentioned range of the NOR type hindered amine-based stabilizer and the phosphoric ester-based flame retardant has strength and flame retardant property as well.

Flame retarding polypropylene fiber and production method thereof and flame retarding polypropylene film

A method for producing a flame retarding polypropylene fiber having both good flame retardancy and good fiber strength, and which generates no toxic gas, includes mixing 0.4% by wt. or more of a hindered amine-based stabilizer and 0.5% by wt. or more of a phosphoric ester-based flame retardant with a polypropylene resin having an MPR of 5 to 50 g/10 min, melt-spinning the mixture to form an undrawn yarn, drafting the yarn at a drafting magnification of 2 to 7 fold and a drafting temperature of 50 to 100&#xb0; C., and further thermally setting at 60 to 140&#xb0; C.

Process of making flame retarding polypropylene fiber

A luminous fiber described below, which does not exert a harmful effect on human bodies and is capable of emitting light for a long period of time with a high luminance, and a process for producing the luminous fiber are provided. A high luminance luminous fiber comprising a core component containing a polyolefin resin and 10-60% by weight, relative to the core component, of a luminous pigment comprising sintered fine powders represented by the formula of

High luminance luminous fiber and process for producing the same

A fragrant sheath-core composite fiber suitable for bedding and having a cross-section including a sheath and a core including a hollow portion, wherein an aromatic perfume having a boiling point higher than 150.degree. C. under normal pressure is incorporated and dipersed in an amount 0.1 to 10.0% by weight in a thermoplastic polymer constituting the core. The core component is preferably a polyethylene type polymer, and the sheath component is preferably a polyethylene terephthalate polymer. One of typical compositions of the aromatic perfume is an essential oil mixture including (1) 10 to 20% of lemon oil, (2) 5 to 15% of bergamot oil, (3) 2 to 8% of lavender oil, (4) 2 to 8% of lemongrass oil, (5) 2 to 8% of cedarwood oil and (6) 0.5 to 1.5% of jasmine absolute.

Fragrant fiber

Growing community of inventors

Aichi, Japan

Yoshishige Shimizu