Abstract:
Provided is a fiber reinforced thermoplastic resin molding material including: a thermoplastic resin [A]; a resin impregnated reinforcing fiber filament [E] obtained by impregnating reinforcing fibers [B] with a resin [D] having melt viscosity at 200°C lower than melt viscosity of the thermoplastic resin [A]; and a reinforcing fiber modifier [C] that has melt viscosity at 200°C lower than the melt viscosity of the thermoplastic resin [A] and a difference in solubility parameter value from the thermoplastic resin [A] equal to or larger than 1.0, the molding material including 50 to 98.9 parts by weight of the thermoplastic resin [A]; 1 to 40 parts by weight of the reinforcing fiber [B]; 0.1 to 10 parts by weight of the reinforcing fiber modifier [C]; and 0.2 to 12 parts by weight of the resin [D] relative to total 100 parts by weight of the thermoplastic resin [A], the reinforcing fiber [B], and the reinforcing fiber modifier [C], wherein the resin impregnated reinforcing fiber filament [E] is coated with a resin composition including the thermoplastic resin [A] and the reinforcing fiber modifier [C]. Also provided is a thermoplastic resin molded article having excellent impact strength, whereby fiber break of reinforcing fibers is suppressed when impact is applied to the molded article.
Abstract:
Provided are the following: a sandwich structure formed from a core component comprising a discontinuous reinforcing fiber, a thermoplastic resin and voids, and a skin component comprising a continuous reinforcing fiber and a matrix resin, wherein in the core component, 30% or more of the discontinuous reinforcing fiber is covered with the thermoplastic resin and monofilaments of the discontinuous reinforcing fiber intersect one another via the thermoplastic resin; an integrally formed article using the sandwich structure; and methods for the production therefor.
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a molding material and of a molding having both excellent conductivity and moldability (flowability, ease of molding, or the like upon molding). SOLUTION: The manufacturing method of the molding material comprises sticking a treating agent to a surface of a conductive material to obtain a composite conductive material, and mixing the composite conductive material with a resin, the resin being selected so that when the treating agent of 0.5-3 wt.% and the resin of 97-99.5 wt.% are mixed, they are not compatible with each other, and the resin has a nature in which the treating agent is coated by the resin to constitute a sea/an island structure. The manufacturing method of the molding comprises molding using the molding material.
Abstract:
PROBLEM TO BE SOLVED: To produce a chopped carbon fiber strand that has good fluidity and excellent cost performance, to obtain a fiber-reinforced thermoplastic resin composition produced by using the chopped strand and a formed body having good mechanical properties and electroconductivity produced by using the fiber- reinforced thermoplastic resin composition. SOLUTION: The objective chopped carbon fiber strand is surface-coated with a sizing agent including a polyether as a major component, and in addition, over-coated with another sizing agent including a thermoplastic resin.
Abstract:
PROBLEM TO BE SOLVED: To provide a carbon fiber bundle for molding, excellent in weaving performance and suitable for RIM molding. SOLUTION: This carbon fiber bundle for molding is characterized by being stuck with a water-soluble polyamide resin having 10-30 wt.% saturated water absorption and >=170% tensile elongation at break so as to satisfy the relationship: [saturated water absorption (wt.%)]×[add-on (wt.%)]
Abstract:
Provided is a carbon fiber bundle having carbon fibers and a sizing agent, wherein the sizing agent comprises a water soluble polyurethane resin having an SP value of 11.2 to 13.3, and the sizing agent is deposited on the carbon fibers at a rate of 0.5 to 7% by mass. Also provided is a carbon fiber bundle having carbon fibers and a sizing agent, the sizing agent is composed of the component shown in (A) and the component shown in (B1) or (B2) below, and the sizing agent is deposited on the carbon fibers at a rate of 0.5 to 7% by mass: (A) 73 to 98% by mass of a polyoxyalkylene unit; (B1) 0.5 to 15% by mass of an aromatic ester unit, 1.5 to 10% by mass of an aromatic urethane unit; and (B2) 0.5 to 10% by mass of an aromatic ester unit, 1.5 to 11% by mass of an aliphatic urethane unit. Further provided is a carbon fiber bundle having good handleability during the production and processing of the fiber bundle, an excellent convergence property, and excellent dispersibility in an aqueous dispersion medium even at a high concentration.
Abstract:
A molded product and a unified molded product that are lightweight and also high in rigidity to meet the requirements from the market can be produced from a molded product comprising: a first member (I) containing a planar surface layer part and a protruding core part, and a second member (II) unified therewith, the first member (I) being of a fiber-reinforced resin (A) formed mainly of a reinforcing fiber (a1) and a matrix resin (a2), part of the threads of the reinforcing fiber (a1) extending penetratingly between the surface layer part and the core part, the part of the threads of the reinforcing fiber (a1) extending penetratingly at a rate of 400 threads/mm 2 or more through the boundary surface between the surface layer part and the core part, the reinforcing fiber (a1) having a number-average fiber length Ln of 1 mm or more, and the core part forming a hollow structure.
Abstract translation:可以通过模制产品来制造重量轻且刚性高的成型产品和统一的模制产品,包括:包含平坦表面层部分和突出芯部分的第一部件(I) 和与其一体化的第二构件(II),第一构件(I)由主要由增强纤维(a1)和基体树脂(a2)形成的纤维增强树脂(A),增强部分 纤维(a1)穿透表面层部分和芯部之间延伸,增强纤维(a1)的螺纹部分以400线/ mm 2以上的速率穿过表面层部分 和核心部分,数均纤维长度Ln为1mm以上的增强纤维(a1)和形成中空结构的芯部。
Abstract:
A molding material comprising the following components (A) to (D) at the following ratios, in which the component (D) is bonded to a composite comprising the components (A) to (C) and the order in the weight average molecular weight is component (D) > component (B) > component (C) ; (A) 1 to 75 wt% of a reinforcing fiber bundle; (B) 0.01 to 10 wt% of a first propylene-based resin;(C) 0.01 to 10 wt% of a second propylene-based resin having carboxylate groups bound to the polymer chains thereof; and (D) 5 to 98.98 wt% of a third propylene-based resin (first aspect). A resin-adhered reinforcing fiber bundle, wherein a mixture comprising a first propylene-based resin (B) and a second propylene-based resin (C) is adhered to a reinforcing fiber bundle (A); the weight average molecular weight of the first propylene-based resin (B) is larger than the weight average molecular weight of the second propylene-based resin (C); the second propylene-based resin (C) is a propylene-based resin having carboxylate groups bound to the polymer chains thereof; the adhered amount of the mixture comprising the first propylene-based resin (B) and the second propylene-based resin (C) is in a range from 0.1 to 30 parts by weight per 100 parts by weight of the reinforcing fiber bundle (A) ; and the content of the second propylene-based resin (C) is 0.3 to 45 parts by weight per 100 parts by weight of the first propylene-based resin (B) (second aspect). A molding material of this invention provides a long fiber-reinforced thermoplastic resin molding material containing a propylene-based resin as the matrix resin, which allows the reinforcing fibers to be well dispersed into the molded article produced at the time of injection molding and allows the molded article produced to have excellent mechanical properties (first aspect). A resin-adhered reinforcing fiber bundle of this invention provides a resin-adhered reinforcing fiber bundle excellent in the adhesiveness between the matrix resin comprising a thermoplastic resin, particularly a polyolefin-based matrix resin and reinforcing fibers, and good in handling properties (second aspect).