Teijin Limited

Shuhei Suzuki

Hodaka Yokomizo

Hidenori Aoki

Takeru Ohki

Makoto Ootsubo

Masahiro Kitagawa

Takashi Toyozumi

Takaya Fujii

Akihiko Obata

Takumi Kato

Akihisa Nomura

Shuhei Onoue

Guofei Hua

A method for producing a press molded body is provided in which a material X that contains a thermoplastic resin Rand carbon fibers A having a weight average fiber length Land a material Y that contains a thermoplastic resin Rand carbon fibers B having a weight average fiber length Lare heated, and the heated material X and material Y are pressed within a mold at the same time, thereby producing a press molded body which has a region X that is formed of the material X and a region Y that is formed of the material Y. This method for producing a press molded body is configured such that: L<L; Lis from 0.1 mm to 15 mm (inclusive); and the press molded body has a transition zone XY where the region X and the region Y overlap with each other.

Method for producing press molded body

The present invention provides a method for inspecting a material to be inspected using ultrasound waves, the method including the following stepto step, in which stepis performed in a condition where: the surface temperature of a material under inspection&#x2014;atmospheric temperature&#x3e;2&#xb0; C., and inspection using ultrasound waves in stepsatisfies: a refractive attenuation rate&#x2264;1.5%. Step: blowing a fluid from a blowing port onto the material to be inspected. Step: inspecting the material to be inspected using the ultrasound waves after stepor at the same time as the step

Ultrasonic inspection of extents of voids or the like in heated material using fluid blowing

A composite material which includes a thermoplastic matrix resin and carbon fibers A including carbon fiber bundles A1 in which Li/(Ni&#xd7;Di) satisfies 6.7&#xd7;10to 3.3&#xd7;10, wherein the carbon fibers A have a fiber length of 5-100 mm and have a value of Lw/(Nave&#xd7;D) of 1.0&#xd7;10to 3.3&#xd7;10, the carbon fiber bundles A1 having an average bundle width Wless than 3.5 mm and being contained in an amount of 90 vol % or larger with respect to the carbon fibers A A production method for producing a molded object from the composite material is also provided.

Composite material, production method for molded object, and production method for composite material

A molding material for a multi-layered structure, includes a thermoplastic resin layer (X) including carbon fibers (A) having a weight-average fiber length of 0.01 mm to less than 3 mm; and a thermoplastic resin layer (Y) including carbon fibers (B) having a weight-average fiber length of 3 mm to 100 mm, in which a density parameter Pof the thermoplastic resin layer (Y) expressed by the following Equation (1) is 1&#xd7;10to less than 1&#xd7;10, and in which a density parameter Pof the thermoplastic resin layer (X) expressed by the following Equation (1) is more than 1&#xd7;10:=()/&#x2003;&#x2003;(1),

Molding material for multi-layered structure and molded article of multi-layered structure

A method for producing a fiber-reinforced resin shaped product, by clamping and press-molding a molding material containing reinforcing fibers and a thermoplastic resin as a matrix in molds having an upper mold and a lower mold. The method includes: disposing the molding material heated in a plastic state, between the upper mold and the lower mold; initiating the clamping to apply a force in a substantially clamping direction to a certain site of the molding material; starting deformation of the molding material in the substantially clamping direction; applying a force in the substantially clamping direction to a fixing site which is at least a part of a substantially outer peripheral end portion of the molding material but is different from the certain site; pressing and fixing the fixing site, and completing the clamping to obtain a fiber-reinforced resin shaped product having an edge portion.

Method for producing fiber-reinforced resin shaped product

A molded article including carbon fibers and thermoplastic resin, the molded article being provided with a hole h, wherein the molded article has a region a around the hole h, the relationship between the linear expansion coefficient Cin the plate thickness direction in region a and the linear expansion coefficient Cin a molded article region other than the region a is C/C&#x3c;1, and the relationship of the carbon fiber volume fraction Vfof region a and the carbon fiber volume fraction Vfof a molded article region other than the region a is 0.2&#x3c;Vf/Vf

Molded article having hole, and method for producing same

There is provided a plate-shaped carbon fiber reinforced molding material comprising a thermoplastic resin, carbon fibers (A) and carbon fibers (B), wherein:

Carbon fiber reinforced molding material and shaped product

A method for producing a shaped product having an opening by arranging a molding material including discontinuous carbon fibers and a thermoplastic resin on a mold and cold-pressing the molding material, wherein

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Osaka, Japan

Shuhei Suzuki