摘要:
A binder fiber comprising a polyamide component in at least part of a surface thereof is prepared. The polyamide component contains a semi-aromatic polyamide at least having an aromatic ring unit and a C3-7 alkane unit which may have a branched CA 1-3 alkyl chain. In the binder fiber, the polyamide component may be (a) a semi-aromatic copolyamide having an aromatic ring unit, a C3-7 alkane unit which may have a branched C1-3 alkyl chain, and a C8-12 alkane unit which may have a branched C1-3 alkyl chain. The polyamide component may be (d) a combination of (b) a semi-aromatic polyamide and (c) a semi-aromatic polyamide, wherein the polyamide (b) has an aromatic ring unit and a C3-7 alkane unit which may have a branched C1-3 alkyl chain, and the polyamide (c) has an aromatic ring unit and a C8-12 alkane unit which may have a branched C1-3 alkyl chain.
摘要:
A polyamide resin composition contains 100 parts by weight of (A) a polyamide resin with a melting point of 270° C. to 340° C.; 0.2 to 20 parts by weight of (B) a compound represented by Formula (I) where R1 and R2 are alkyl groups having at least 9 carbon atoms, and m and n are integers from 1 to 3; and 1 to 100 parts by weight of (C) a bromine-based flame retardant.
摘要:
A multilayer tube including at least three layers including a layer (a) formed of (A) polyamide 11 and/or polyamide 12, a layer (b) formed of (B) a polyamide (semi-aromatic polyamide) including a dicarboxylic acid unit containing a terephthalic acid and/or naphthalenedicarboxylic acid unit in a proportion of 50 mol % or more based on all dicarboxylic acid units, and a diamine unit containing an aliphatic diamine unit having a carbon number of 9 to 13 in a proportion of 60 mol % or more based on all diamine units, and a layer (c) formed of (C) a fluorine-containing polymer having introduced into the molecular chain thereof a functional group having reactivity with a polyamide-based resin, is provided as a multilayer tube excellent in an alcohol gasoline permeation-preventing property, interlayer adhesion, low-temperature impact resistance, heat resistance and chemical resistance.
摘要:
A multilayer structure comprising at least two or more layers including a layer (a) comprising (A) polyamide 11 and/or polyamide 12, and a layer (b) comprising (B) a polyamide (polyamide 9N) consisting of a dicarboxylic acid unit comprising a naphthalenedicarboxylic acid unit in a proportion of 50 mol % or more based on all dicarboxylic acid units and a diamine unit comprising a 1,9-nonanediamine and/or 2-methyl-1,8-octanediamine unit in a proportion of 60 mol % or more based on all diamine units. A multilayer structure excellent in the alcohol gasoline permeation-preventing properties, interlayer adhesion, low-temperature impact resistance and heat resistance is provided.
摘要:
In the permanent magnet motor of the present invention, where P is an integer not smaller than one, the number of magnetic poles of a rotor (22) is set to 2P, and the number of salient poles of a stator field core (21) is set to 3P. The salient pole section (21a) of each stator field core (21) is provided with two supplemental grooves (24). A salient pole magnetic interpolar angle is 4.theta., such that two supplemental grooves (24) of each salient pole section (21a) are arranged in positions at angles of .theta. and 3.theta. with respect to the center of a winding slot (27) in the circumferential direction of the rotor. With this structure, a fundamental wave component of a clogging torque is removed and a permanent magnet motor having a low clogging torque is provided.