A method of forming foam material is provided, which includes mixing 100 parts by weight of a compound having cyclic carbonate groups and a foaming agent to form a foaming composition, wherein the foaming agent includes 3 to 13 parts by weight of carbamate salt and 15 to 65 parts by weight of amino compound. The foaming composition is heated to 100° C. to 170° C. for decomposing the carbamate salt into CO.sub.2 and amino compound, and the amino compound is reacted with the compound having cyclic carbonate groups to form the foam material.

The invention disclosed herein is an automotive acoustic panel including a porous sound-absorption material made from a polymer and an expanded perlite. One or more silane compounds may be coupled or coated onto the expanded perlite while a coupling agent and a chemical foaming agent may additionally be added to the automotive acoustic panel.

A sheet formed from carbon fiber reinforced thermoplastic resin with high heat resistance, and a production method of said sheet is provided. This sheet is formed from a carbon fiber reinforced thermoplastic resin that contains carbon fibers, dichloromethane, and a thermoplastic resin containing at least one of a polycarbonate resin and a polyarylate resin. The aforementioned at least one of a polycarbonate resin and a polyarylate resin has a constituent unit derived from a dihydric phenol represented by formula (1), and the content of the dichloromethane contained in the sheet is 10-10,000 ppm by mass. (In formula (1), R.sub.1-R.sub.4 independently represent a hydrogen, a halogen, a nitro, or a methyl group; X represents a divalent group represented by any of formulas (2) to (4).) ##STR00001##

[Problem] A metal-fiber reinforced resin material composite is provided which improves the shear strength between a metallic member and a fiber reinforced material by more strongly bonding the metallic member and the fiber reinforced resin member, and which is very light and has excellent workability while increasing strength. [Solution] This metal-fiber reinforced resin material composite is provided with a metallic member and with a fiber reinforced resin material that is stacked on at least one surface of the metallic member and combined with the metallic member, wherein the fiber reinforced resin material comprises a matrix resin containing a thermoplastic resin, a reinforcing fiber material included in the matrix resin, and a resin layer interposed between the reinforcing fiber material and the metallic member and comprising a resin of the same type as the matrix resin. The shear strength of the metallic member and the fiber reinforced resin material is greater than or equal to 0.8 MPa.

A method of forming foam material is provided, which includes mixing 100 parts by weight of a compound having cyclic carbonate groups and a foaming agent to form a foaming composition, wherein the foaming agent includes 3 to 13 parts by weight of carbamate salt and 15 to 65 parts by weight of amino compound. The foaming composition is heated to 100° C. to 170° C. for decomposing the carbamate salt into CO.sub.2 and amino compound, and the amino compound is reacted with the compound having cyclic carbonate groups to form the foam material.

The present invention has an object of providing a prepreg for producing a laminate suitable as a structural material, and a laminate, which have excellent combustion resistance, compressive strength and interlaminar fractural toughness values, and can be firmly integrated with another structural member by welding. The present invention is a prepreg including structural components: [A] reinforcing fibers, [B] a thermosetting resin, and [C] a thermoplastic resin [C], wherein [B] includes at least one resin selected from a cyanate ester resin having an average cyanate equivalent of 220 or less, a bismaleimide resin having an average maleimide equivalent of 210 or less, and a benzoxazine resin having an average oxazine equivalent of 300 or less, [C] is present on a surface of the prepreg, and the reinforcing fibers [A] are present which are included in a resin area including [B] and a resin area including [C] across an interface between the two resin areas.

A composition that contains a polycarbonate resin and a recycled carbon fiber, and demonstrates mechanical strength which is close to that of a case where the virgin carbon fiber is blended. The composition contains 100 parts by mass of a polycarbonate resin having a terminal hydroxy group content of 150 to 800 ppm; and 5 to 65 parts by mass of a recycled carbon fiber which is a heated product of a carbon fiber-reinforced resin. A pellet formed of the composition. A molded article formed of the composition. A method for producing the composition. The method includes feeding to an extruder 100 parts by mass of a polycarbonate resin having a terminal hydroxy group content of 150 to 800 ppm, and 5 to 65 parts by mass of a recycled carbon fiber which is a heated product of a carbon fiber-reinforced resin; and melt kneading the extruded polycarbonate resin.

Provided is a member in which the strength of a second layer located on the outermost surface of the exterior is improved in order to sufficiently exhibit and maintain the functions, to thereby improve impact resistance and scratch resistance. The member is a member including a base material, a first layer, a second layer, and a third layer in the stated order, wherein the first layer is an inorganic porous layer in which a plurality of inorganic particles are joined to each other, and the first layer and the second layer have a total thickness of 0.3 μm or more and 2 μm or less, wherein the third layer contains a resin and has a thickness of 0.4 μm or more and 2,000 μm or less, and wherein the second layer contains the inorganic particles and the resin.

A polymer matrix composite includes a porous polymeric network structure; and a plurality of acoustically active particles distributed within the polymeric network structure. The weight fraction of acoustically active particles is between 0.80 and 0.99, based on the total weight of the polymer matrix composite. The polymer matrix composite has an air flow resistance of less than 100 seconds/50 mL/500 μm.

[Problem] To provide a reinforcing fiber bundle that can maintain a good opening state of reinforcing fibers and that can produce a fiber-reinforced composite having excellent mechanical strength; a reinforcing fiber woven fabric using the same; a carbon fiber reinforcing composite using the same; and methods for producing the same. [Solution] A reinforcing fiber bundle comprising a plurality of reinforcing fibers is produced, the reinforcing fiber bundle having a cross-linking portion comprising a carbon allotrope between the reinforcing fibers.