Abstract: A fiber-reinforced polymer alloy substrate, in which continuous reinforcing fibers are arranged in parallel and are impregnated with a polymer alloy, is characterized in that: a polymer alloy obtained by combining thermoplastic resins of at least two types is used as the polymer alloy; the fiber volume content is in the range of 40 to 70% by volume; and the dispersion parameter D of the fibers is 90% or more. In the obtained fiber-reinforced polymer alloy substrate, the reinforcing fibers are dispersed with high uniformity, and high mechanical properties and heat resistance are stably exhibited with low variation.

Abstract: A multiaxial fabric resin base material includes a multiaxial fabric base material laminate impregnated with a thermosetting resin (B), the multiaxial fabric base material laminate including fiber bundle sheets layered at different angles, the fiber bundle sheets including unidirectionally aligned fiber bundles stitched with stitching yarns composed of a thermoplastic resin (A), the multiaxial fabric base material laminate being penetrated in the thickness direction by other bodies of the stitching yarns, and being stitched with the other bodies of the stitching yarns such that the yarns reciprocate at predetermined intervals along the longitudinal direction, the thermoplastic resin (A) constituting the stitching yarns having a softening point, the softening point being higher than the resin impregnation temperature of the thermosetting resin (B).

Abstract: A tank includes a liner including an inner shell; and a reinforcing layer covering an outer surface of the liner; wherein the reinforcing layer is formed by continuously winding resin-impregnated fiber bundles around the liner, the reinforcing layer includes a hoop layer placed in a side of the liner, and a helical layer, gaps are formed between adjacent bundles of the resin-impregnated fiber bundles wound in the hoop layer, there is at least one site where the resin-impregnated fiber bundles are wound without forming a gap between adjacent bundles in the helical layer, and resin in the resin-impregnated fiber bundles has a resin toughness value of not less than 1.0 MPa·m0.5.

Abstract: A fiber-reinforced composite molded article which is obtained by molding reinforcing fibers and an epoxy resin, while containing a silicone oil as an internal mold release agent, and which is characterized in that the fragment ion intensity ratio A/B as detected in case where the molded article surface is analyzed by time-of-flight secondary ion mass spectrometry is expressed by the relationship of 3?A/B?20. A: The intensity of a fragment ion that has the highest intensity among the fragment ions derived from the silicone oil. B: The intensity of a fragment ion that has the highest intensity among the fragment ions derived from the epoxy resin.

Abstract: A fiber-reinforced resin base material includes continuous reinforcing fibers or a reinforcing fiber base material in which discontinuous fibers are dispersed, the continuous reinforcing fibers or a reinforcing fiber base material being impregnated with a polyphenylene sulfide resin composition, wherein the fiber-reinforced resin base material has a glass-transition temperature, as measured by the DMA method (bending mode), of 115° C. or higher.

Abstract: A multiaxial fabric resin base material includes a multiaxial fabric base material laminate impregnated with a thermosetting resin (B), the multiaxial fabric base material laminate including fiber bundle sheets layered at different angles, the fiber bundle sheets including unidirectionally aligned fiber bundles stitched with stitching yarns composed of a thermoplastic resin (A), the multiaxial fabric base material laminate being penetrated in the thickness direction by other bodies of the stitching yarns, and being stitched with the other bodies of the stitching yarns such that the yarns reciprocate at predetermined intervals along the longitudinal direction, the thermoplastic resin (A) constituting the stitching yarns having a softening point, the softening point being higher than the resin impregnation temperature of the thermosetting resin (B).

Abstract: A fiber reinforced resin base material is formed by impregnating a continuous reinforcing fiber(s) or a reinforcing fiber material having a discontinuous fiber(s) dispersed therein with a resin composition which exhibits a single glass-transition temperature before and after being heated at 400° C. for one hour, wherein the resin composition is composed of (A) a thermoplastic resin having a glass-transition temperature of 100° C. or more and (B) a thermoplastic resin having a glass-transition temperature of less than 100° C. The fiber reinforced resin base material has excellent impregnation properties and thermal stability, having fewer voids, and having surface quality and high heat resistance.

Abstract: A fiber-reinforced polymer alloy substrate, in which continuous reinforcing fibers are arranged in parallel and are impregnated with a polymer alloy, is characterized in that: a polymer alloy obtained by combining thermoplastic resins of at least two types is used as the polymer alloy; the fiber volume content is in the range of 40 to 70% by volume; and the dispersion parameter D of the fibers is 90% or more. In the obtained fiber-reinforced polymer alloy substrate, the reinforcing fibers are dispersed with high uniformity, and high mechanical properties and heat resistance are stably exhibited with low variation.

Abstract: A polyphenylene sulfide resin composition has excellent heat resistance, flowability and lightweight property as well as surface smoothness and impact resistance. The polyphenylene sulfide resin composition includes 1 to 30 parts by weight of a mica (b) having an aspect ratio of not less than 80, relative to 100 parts by weight of a polyphenylene sulfide resin (a).

Abstract: A polyphenylene sulfide resin composition has excellent heat resistance, flowability and lightweight property as well as surface smoothness and impact resistance. The polyphenylene sulfide resin composition includes 1 to 30 parts by weight of a mica (b) having an aspect ratio of not less than 80, relative to 100 parts by weight of a polyphenylene sulfide resin (a).

Abstract: A polyphenylene sulfide resin composition includes 5-50% by weight of (A) a polyphenylene sulfide resin having a weight-average molecular weight of not less than 10000 and a polydispersity, which is expressed by dividing the weight-average molecular weight by a number-average molecular weight, of not higher than 2.5; and 95-50% by weight of (B) fused silica in a spherical form having a volume-average particle diameter of not less than 0.1 ?m and less than 1.0 ?m, wherein a total of (A) and (B) is kept at 100% by weight.

Abstract: There is provided a polyphenylene sulfide resin composition, comprising 5 to 95% by weight of a component (B) which is a polyphenylene sulfide resin having a weight-average molecular weight of not less than 10,000 and a weight loss percentage ?Wr of not greater than 0.18% under heating, relative to 95 to 5% by weight of a component (A) which is a polyphenylene sulfide resin having the weight loss percentage ?Wr of greater than 0.18%, wherein a total of the component (A) and the component (B) is equal to 100% by weight.

Abstract: There is provided a polyphenylene sulfide resin composition, comprising 5 to 95% by weight of a component (B) which is a polyphenylene sulfide resin having a weight-average molecular weight of not less than 10,000 and a weight loss percentage ?Wr of not greater than 0.18% under heating, relative to 95 to 5% by weight of a component (A) which is a polyphenylene sulfide resin having the weight loss percentage ?Wr of greater than 0.18%, wherein a total of the component (A) and the component (B) is equal to 100% by weight.

Abstract: There is provided a polyphenylene sulfide resin composition, comprising 5 to 95% by weight of a component (B) which is a polyphenylene sulfide resin having a weight-average molecular weight of not less than 10,000 and a weight loss percentage ?Wr of not greater than 0.18% under heating, relative to 95 to 5% by weight of a component (A) which is a polyphenylene sulfide resin having the weight loss percentage ?Wr of greater than 0.18%, wherein a total of the component (A) and the component (B) is equal to 100% by weight.

Abstract: A polyphenylene sulfide resin composition has excellent heat resistance, flowability and lightweight property as well as surface smoothness and impact resistance. The polyphenylene sulfide resin composition includes 1 to 30 parts by weight of a mica (b) having an aspect ratio of not less than 80, relative to 100 parts by weight of a polyphenylene sulfide resin (a).

Abstract: There is provided a polyphenylene sulfide resin composition, comprising 5 to 95% by weight of a component (B) which is a polyphenylene sulfide resin having a weight-average molecular weight of not less than 10,000 and a weight loss percentage ?Wr of not greater than 0.18% under heating, relative to 95 to 5% by weight of a component (A) which is a polyphenylene sulfide resin having the weight loss percentage ?Wr of greater than 0.18%, wherein a total of the component (A) and the component (B) is equal to 100% by weight.