Abstract: 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° C., and further set thermally at a temperature of 60 to 140° 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.

Abstract: 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° C., and further thermally setting at 60 to 140° C.

Abstract: 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° C., and further set thermally at a temperature of 60 to 140° 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.

Abstract: 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° C., and further set thermally at a temperature of 60 to 140° 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.

Abstract: 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(M.sub.0.9995-0.998 Eu.sub.0.0005-0.002)Al.sub.2 O.sub.4.(M.sub.0.9995-0.998 Eu.sub.0.0005-0.002)O.n(Al.sub.1-b-a B.sub.b Q.sub.a).sub.2 O.sub.3,wherein M represents at least one element selected from the group consisting of Sr, Ca, Mg and Ba, Q represents at least one element selected from the group consisting of Y, lanthanoid elements, Mn and Bi, a is 0.0005-0.002, b is 0.001-0.35 and n is an integer of 1-8, and a sheath component comprising a polyolefin resin containing no luminous pigment.

Abstract: 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.

Abstract: A corrugated fibreboard shipping box for packing a stack of sheet material stacked into a flat rectangular shape having a certain thickness is made of a single box blank. The box blank is comprised of a rectangular bottom section, a pair of rectangular side sections connected to the opposite sides of the bottom section, a pair of top half sections connected to the sides of the side sections, and flaps connected to the opposite ends of the bottom section, side section and top half sections. The flaps are provided with parallel folding lines at which the flaps are folded inside to form folded end portions. The folded end portions close the open ends of the box. The corrugated fibreboard shipping box packs and protect the stack of sheet materials without pads.