Agency of Industrial Science and Technology

Ministry of International Trade & Industry

Agency of Industrial Science and Technology Ministry of International

Yoshihiro Nagatsuka

Takeshi Kitano

Kenji Fukuta

Eiji Aoki

A method for the production of a completely impregnated composite material having the surface thereof coated with a thermosetting resin and essentially consisting of a thermoplastic resin matrix including minute voids filled with a thermosetting resin and reinforcing fibers, which method comprises setting in place a roller and a collecting section disposed in the direction of the rotation of the roller, rotating the roller, feeding thermoplastic resin fibers and reinforcing fibers to the roller, causing the roller to throw a uniform mixture of the two types of fibers onto the collecting section, thereby forming a composite mat of the uniform mixture on the collecting section, then thermally compressing the composite mat and further solidifying the compressed composite mat by cooling and forming a composite material of the shape of a plate, further heating the composite material, thereby melting and expanding the thermoplastic resin forming the matrix, then cooling the expanded composite material, thereby forming a foam composite material including minute voids, and subsequently causing a thermosetting resin to form a coating on the surface of the foam composite material and fill the minute voids in the composite material, a method for the production of a coated composite material by the removal of the thermosetting resin filling the minute voids in the composite material obtained by the method described above, and a coated type or completely impregnated composite material produced by the method described above, consisting of a matrix formed of thermoplastic resin and reinforcing fibers, having a thermosetting resin attached to the surface thereof, the matrix including minute voids, and the voids being filled or not filled with a thermosetting resin.

Method for production of composite material and composite material

A method for producing a material for a fiber-reinforced composite article is disclosed which comprises preparing an apparatus composed of a belt and at least one fiber-separating and throwing device, setting the belt in motion and the roller in rotation, feeding a mixture of matrix thermoplastic resin fibers (a) and reinforcing fibers (b) to the roller, causing the roller to separate the fibers and throw the separated, fibers, and allowing the thrown fibers to pile up on the moving belt, thereby giving rise to a mat wherein the ratio of the fibers (a) and (b) successively increases or decreases in the direction of thickness of the mat.

Method for production of material for composite article

A three-dimensional woven fabric for use in a battery is composed of three groups of filaments interlaced to form a three-dimensional weave, the filaments of one of the groups being formed of two kinds of electrode materials for a battery arranged parallely and alternately and the filaments of the other two groups serving as separators and being arranged so as to fix the filaments made of the electrode materials.

Three-dimensional woven fabric for battery

Pieces of cloth are superimposed, with sewing fibers extending from themselves or separately placed on them. Fine jet streams of a liquid or a mixed fluid of gas and liquid under pressure are shot against the superimposed pieces of while moving the shooting position relative to the cloth. Then, the superimposed pieces of cloth are sewn together by the action of the jet streams that causes the sewing fibers to twine with the cloth. The jet streams are shot to the same point on the superimposed pieces of cloth from their both sides, thus causing the sewing fibers to twine with one another or with the superimposed pieces of cloth. At the same time, the resulting splashes of the sprayed fluid are sucked and removed from therearound. The jet streams acting on the sewing fibers from both sides cause them to sew together the superimposed pieces of cloth. The jet streams penetrating deep into the superimposed pieces of clotch collide with each other at high speed and vigorously splash about, accomplishing effective twining of the sewing fibers and leaving little liquid within the superimposed pieces of cloth. Most of the liquid splashes about and is removed from within surrounding covers through suction units.

Method and apparatus for sewing together pieces of cloth with jet streams

A method for the formation of a three-dimensional woven fabric comprises causing arms of carriers disposed around one component yarns out of three mutually perpendicular component yarns and having the other two component yarns separately held thereon to be rotated, opposing carrier arms of adjacent carriers to each other thereby effecting transfer of yarns, and successively effecting said transfer of yarns to carrier arms of the subsequent carriers thereby enabling the two component yarns to be displaced and zigzagged relative to the remaining one component yarn. An apparatus for effecting the aforementioned method essentially comprises a multiplicity of carriers arrayed longitudinally and laterally on a carrier holding plate and means for imparting necessary movements to the carriers. The three-dimensional woven fabric can be formed in a desired shape or yarn arrangement by suitably varying the pattern of arrangement of the two component yarns.

Growing community of inventors

Tsukuba, Japan

Yoshihiro Nagatsuka