An object of the present invention is to reduce or eliminate a defect (e.g., a void) by achieving (i) a semipreg and a prepreg each of which allows a reduction in residual volatile component and (ii) methods for producing the semipreg and the prepreg, respectively, and consequently to achieve (iii) a fiber-reinforced composite material which has high heat resistance and superior mechanical strength and a (iv) a method for producing the fiber-reinforced composite material. The present invention attains the above object by providing, for example, a semipreg containing: powders of an imide oligomer; and reinforcement fibers, the imide oligomer being represented by a specific general formula (1).

Provided is a composite laminate having excellent releasability from a mold during a production process and having excellent surface appearance (surface smoothness). A composite laminate 1 including an A layer 2 and a B layer 3, the A layer 2 being provided on one or both sides of the B layer 3, the A layer 2 containing inorganic fibers (a1) with an average fiber length of 1 μm to 300 μm and a thermoplastic resin (a2), the B layer 3 containing reinforcing fibers (b1) with an average fiber length of 1 mm or more and a thermoplastic resin (b2).

A thermoplastic resin composition and a molded article formed of the same. The thermoplastic resin composition includes: about 100 parts by weight of a polycarbonate resin; about 5 to about 20 parts by weight of a rubber modified aromatic vinyl copolymer resin; about 0.5 to about 3 parts by weight of a maleic anhydride-grafted rubber polymer; about 50 to about 100 parts by weight of glass fibers; about 10 to about 30 parts by weight of barium sulfate; and about 5 to about 20 parts by weight of a phosphorus flame retardant. The thermoplastic resin composition can have high specific gravity and good properties in terms of impact resistance, weather resistance, flame retardancy, fluidity, and the like.

An object to provide a vent pipe isolation balloon for a liquefied gas storage tank, which has excellent physical strength, inflatability, and durability at cryogenic temperatures, and a vent pipe isolation device including the balloon. The vent pipe isolation balloon has inner and outer membranes made of silicon rubber, and a reinforcing substrate sandwiched between the inner membrane and the outer membrane. The balloon has an outer shape of a cylindrical shape or a truncated cone shape with both ends opened, and is inflated when an inert gas is injected into the balloon with the openings sealed. The reinforcing substrate is composed of a fiber bundle and has a network structure.

An actinically curable composition includes (a) at least one monomer of formula (I);

##STR00001## (b) at least one monomer of formula (II);

##STR00002## (c) optionally a urethane (meth)acrylate oligomer; and (d) a photoinitiator,

wherein R.sub.1, R.sub.2, R.sub.3, R.sub.7, R.sub.8 and R.sub.9 are as defined. A method of making a three dimensionally printed composite article from the actinically curable composition is also provided.

A method of making a flexible pipe layer, which method comprises: commingling polymer filaments and carbon fibre filaments to form an intimate mixture, forming yarns of the commingled filaments, forming the yarns into a tape, and applying the tape to a pipe body to form a flexible pipe layer.

A reinforced polycarbonate composition comprising 50-95 wt % of a poly(aliphatic ester-carbonate); 5-40 wt % of a high heat copolycarbonate comprising high heat carbonate units derived from 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethyl-cyclohexane, N-phenyl phenolphthalein bisphenol, 4,4-(1-phenylethylidene)bisphenol, 4,4-(3,3-dimethyl-2,2-dihydro-1H-indene-1,1-diyl)diphenol, 1,1-bis(4-hydroxyphenyl)cyclododecane, 3,8-dihydroxy-5a,10b-diphenyl-coumarano-2′,3′,2,3-coumarane, or a combination thereof, preferably 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethyl-cyclohexane, N-phenyl phenolphthalein bisphenol, or a combination thereof, and optionally comprising low heat carbonate units; 0.1-0.8 wt % of a C.sub.1-16 alkyl sulfonate salt flame retardant; 0.1-0.8 wt % of an anti-drip agent; 5-35 wt % glass fibers; wherein each amount is based on the total weight of the reinforced polycarbonate composition, which sums to 100 wt %.

A glass composition is provided that includes about 57.0 to 62.0% by weight SiO.sub.2, about 20.0 to 25.0% by weight Al.sub.2O.sub.3, about 8.0 to 12.5% by weight MgO, about 7 to 9.0% by weight CaO, about 0.4 to 1.0% by weight Li.sub.2O, 0.0 to about 1.0% by weight Na.sub.2O, about 0 to 0.5% by weight K.sub.2O; and 0.2 to about 1.5% by weight TiO.sub.2. The glass composition has a fiberizing temperature of no greater than about 1,300 C. Such applications include woven fabrics for use in forming wind blades and aerospace structures.

The purpose of the present invention is to provide: an epoxy resin composition having both excellent dispersibility of a solid curing agent and excellent impregnation of reinforcing fibers; a molding material for the fiber-reinforced composite material that has excellent dispersibility of the solid curing agent in the post-thickened resin; and a fiber-reinforced composite material that has excellent appearance quality and mechanical characteristics and little unevenness in physical properties. In order to achieve the aforementioned purpose, this epoxy resin composition has the following configuration. The epoxy resin composition includes all components (A)-(C). The degree of dispersion of component (B) in component (A) is 0.1-0.8, the viscosity at 25° C. is 0.1-100 Pa.Math.s, and the glass transition temperature of an epoxy resin cured product at any hardness between 85%-95% is at least 110° C. Component (A): An epoxy resin having at least two epoxy groups in each molecule Component (B): A solid curing agent Component (C): A dispersant miscible with component (A)

Methods and systems are provided for a composite material. In one example, the composite material includes a polymer base reinforced with a powder formed from pupunha fibers. The resulting composite material is provided as pellets for further processing.