An image-forming device has a plurality of cylindrical image-carrying members, and an optical scanning unit. The plurality of cylindrical image-carrying members is provided in a main casing for rotating about respective rotational axes. The rotational axes are parallel to one another and juxtaposed in a single direction. The optical scanning unit is provided in the main casing and has a plurality of laser generators, a single rotatable polygon mirror, a plurality of mirrors, and a plurality of lenses. The plurality of laser generators is provided one-to-one relationship to the plurality of image-carrying members to emit respective laser beams. The single rotatable polygon mirror deflects the respective laser beams to scan the respective image-carrying members therewith. The plurality of mirrors is provided one-to-one relationship to the plurality of image-carrying members to guide the respective laser beams along respective optical paths to the respective image-carrying members. The plurality of lenses is provided one-to-one relationship to the plurality of image-carrying members and provided in the respective optical paths and between the respective mirrors and the respective image-carrying members. Distances from the respective mirrors to the respective image-carrying members being equal to one another.

Image-forming device

A flame retardant polybutyleneterephthalate composition having excellent flame resistance with reduced tendency to drip during combustion, is provided by adding a halogenated diphenylether and a diepoxide compound to a polyester which contains at least 80 mole percent of terephthalic acid based on the total moles of dicarboxylic acid, and at least 80 mole percent 1, 4-butanediol based on the total moles of diol. Decabromodiphenyl is an optional additive.

Flame-retardant polyester composition

Compounds having defined functional groups are described which color stabilize aromatic carbonate polymers or blends therewith upon exposure to sterilizing radiation.

Enhancing color stability to sterilizing radiation of polymer compositions

A polyamide resin composition according to the present invention comprises (A) crystalline polyamide resin having a glass transition temperature (Tg) of about 50 to about 100° C.; (B) crystalline polyamide resin having a glass transition temperature (Tg) of about 110 to about 160° C.; (C) inorganic filler; (D) white pigment; and (E) light stabilizer, and can have excellent surface gloss, surface reflectance, heat resistance, mechanical strength, moldability, light stability and discoloration resistance.

Polyamide resin composition

The invention relates to compatible polymer blends comprised of a polymer component containing cyclohexyl (meth)acrylate as a monomer, and further comprised of a polymer component containing styrene as a monomer.

Compatible polymer blends

Flame-retardant polyester resin compositions are disclosed which have improved mechanical properties, particularly improved impact properties. The compositions comprise a halogen-containing copolymeric polyester resin derived from terephthalic acid or its derivative, an alkylene glycol or its derivative and a halogen-containing aromatic diol, said copolymeric polyester resin being blended with a minor amount of a modified ethylene copolymer derived by graft polymerization of an α,β-unsaturated carboxylic acid or its derivative on the backbone of ethylene/α-olefin copolymer, and/or a minor amount of an acrylic rubber.

Polyester resin composition

A polyamide based resin composition is prepared mixing a resin composition with a urea compound of the formula: R 2 --NHCONH--R 1 --NHCONH--R 3 wherein R 1 is an aromatic hydrocarbon group and R 2 and R 3 are both aliphatic groups of 8 to 32 carbon atoms, said resin composition being prepared by melt mixing 99 to 40 parts by weight of a polyamide resin and 1 to 60 parts by weight of a modified ethylene copolymer prepared by graft copolymerizing a copolymer of ethylene and an α-olefin of at least three carbon atoms with an α,β-unsaturated carboxylic acid or derivative thereof

Process for the production of a polyamide base resin composition

L'INVENTION CONCERNE UNE COMPOSITION DE RESINE POLYESTER FREINANT LA COMBUSTION ET AYANT DES PROPRIETES AMELIOREES DE RESISTANCE AU CHOC; LA COMPOSITION COMPREND UNE RESINE POLYESTER COPOLYMERE HALOGENEE DERIVANT DE L'ACIDE TEREPHTALIQUE OU D'UN DE SES DERIVES, UN ALCOYLENEGLYCOL OU UN DE SES DERIVES ET UN DIOL AROMATIQUE HALOGENE, CETTE RESINE POLYESTER COPOLYMERE ETANT MELANGEE AVEC UNE PETITE QUANTITE D'UN COPOLYMERE D'ETHYLENE MODIFIE OBTENU PAR POLYMERISATION EN GREFFAGE D'UN ACIDE CARBOXYLIQUE A,B-INSATURE OU D'UN DE SES DERIVES SUR LE TRONC D'UN COPOLYMERE D'ETHYLENE ET D'A-OLEFINE ETOU AVEC UNE PETITE QUANTITE D'UN CAOUTCHOUC ACRYLIQUE.

Composition de resine polyester freinant la combustion et ayant des proprietes ameliorees de resistance au choc

PURPOSE:To improve extremely release characteristics and to increase impact resistance further, by adding a specific urea compound to a polyamide resin composition having impact resistance which is previously blended with a modified ethylene copolymer in molten state CONSTITUTION:99-40ptswt polyamide resin is blended in molten state with 1-60ptswt modified ethylene copolymer which is obtained by grafting 005- 15wt% alpha,beta-unsaturated carboxylic acid or its salt onto a copolymer of ethylene and a >=3C alpha-olefin to give 100ptswt resin composition, which is blended with 0005-5ptswt, preferably 003-03ptwt compound, eg, 1, 4-bis(3-octadecylureido)benzene, etc, shown by the formula (R' is aromatic hydrocarbon residue; R and R are 8-32 aliphatic hydrocarbon residue) Larger effects can be obtained by adding 0002-10ptwt nucleating agent, eg, silica, alumina, etc to 100ptswt resin composition

Seiichiro Maruyama

Papers

Polyester resin composition

Process for the production of a polyamide base resin composition

Composition de resine polyester freinant la combustion et ayant des proprietes ameliorees de resistance au choc

Preparation of polyamide resin composition