The present invention relates to fiber composite plastic (11, 13) comprising a polymer (40, 41) and at least one textile (50), which has at least one palpably inhomogeneous surface (60, 61) with a textile structure and is entirely surrounded by polymer (40, 41), wherein the fiber composite plastic (11, 13) has at least one palpably inhomogeneous surface (60, 61), wherein inhomogeneities of this fiber composite plastic surface are caused by the textile structure, and a method for producing the fiber composite plastic (11, 13).

A copolyester, comprising structural units represented by [I], [II], [III] and [IV]. The number of structural units represented by [III] is 1-99% of the number of structural units represented by [I], and the number of structural units represented by [IV] is 0-99% of the number of structural units represented by [I]. Also provided are a preparation method therefor and an application thereof. Because an introduced high-temperature self-crosslinking group and an ion group can improve the melt viscosity and the melt intensity during burning of a copolyester, and effectively enhance the char-forming capability of the copolyester, the copolyester exhibits excellent flame retardance and anti-dripping performance. The preparation process for the copolyester is mature, convenient to operate, and easy to control and apply to industrial production.

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An apparatus for impregnating fiber structures with a matrix material includes a lower part having a bath for receiving the matrix material and a draining unit. The draining unit includes a wiper having a wiping edge, over which the impregnated fiber structure is guided during operation, and a surface inclined in the direction of the bath, by which matrix material draining from the fiber structure can return into the bath. The draining unit includes a cover on which a deflection unit, by which the fiber structure is pressed into the bath when the cover is mounted, is mounted. When the cover is mounted, a gap is formed between the cover and the lower part on the sides by which the fiber structure is guided into the apparatus and emerges from the apparatus. A method for impregnating fiber structures with a matrix material is also disclosed.

Provided herein are methods, compositions, devices, and systems for the 3D printing of biomedical implants. In particular, methods and systems are provided for 3D printing of biomedical devices (e.g., endovascular stents) using photo-curable biomaterial inks (e.g., or methacrylated poly(diol citrate)).

Polyurethane coating compositions are disclosed that include an isocyanate-reactive component that includes a polycyclic polyether polyol that is the reaction product of a reaction mixture that includes a polycyclic polyol starter, and an alkylene oxide, as well as an isocyanate-functional component that includes a non-aromatic polyisocyanate. The polyurethane coating compositions may be particularly useful as a gel coat in the manufacture of glass fiber reinforced plastics.

Provided are a composite material and a preparation method therefor. The composite material comprises: a base layer; a first plant fibre fabric located on the upper surface of the base layer; optionally, a second plant fibre fabric located on the lower surface of the base layer; and resins present in each layer. The composite material has a decorative performance and an improved mechanical performance.

Provided is a useful improvement in a CF-SMC manufacturing technique comprising an SMC manufacturing method using a continuous carbon fiber bundle having a filament number of NK and partially split into n sub-bundles in advance. In the SMC manufacturing method according to the present invention, a fragmentation processing using a fragmentation processing apparatus (A) below is performed on chopped carbon fiber bundles before being deposited on a carrier film. The fragmentation processing apparatus (A) comprises a first pin roller and a second pin roller, each of which has a rotation axis parallel to a rotation axis direction of the rotary cutter. The first pin roller is rotationally driven such that its pins move downward from above on its side facing the second pin roller, and the second pin roller is rotationally driven such that its pins move downward from above on its side facing the first pin roller.

A manufacturing method of an SMC of the present invention comprises (i) forming chopped carbon fiber bundles by chopping a continuous carbon fiber bundle having a filament number of NK with a rotary cutter, (ii) fragmentation-processing the chopped carbon fiber bundles by using a fragmentation-processing apparatus comprising a rotating body, (iii) forming a carbon fiber mat by depositing the fragmentation-processed chopped carbon fiber bundles on a carrier film traveling below the rotary cutter, and (iv) impregnating the carbon fiber mat with a thermosetting resin composition, wherein N is 20 or more, and the fragmentation-processing apparatus comprises a first pin roller and a second pin roller which are disposed side by side, each having a rotation axis parallel to a rotation axis direction of the rotary cutter.

The present invention provides a fiber-reinforced-resin composite molded article including: a rigid layer that is formed of a fiber-reinforced-resin material for a rigid layer; a shaping layer that is formed, at least on one side of the rigid layer, of a shaping-layer compound composed of a thermosetting resin and fibers that are shorter than fibers contained in the fiber-reinforced-resin material for a rigid layer; and a cured resin being formed of a liquid-state resin that is deposited on the surface of the shaping layer. The fiber-reinforced-resin composite molded article has a structure in which the fiber-reinforced-resin material for a rigid layer, the shaping-layer compound, and the liquid-state resin are cured under heat and pressure in a layered state.

The glass fiber-reinforced resin molded article includes a glass fiber fabric and a transparent resin. The average resin unimpregnation ratio in proximity to filament of the glass fiber fabric is more than 2.0% and 50.0% or less, the warp yarn width Bt and the weft yarn width By of the glass fiber fabric each are from 0.50 to 8.50 mm, the warp yarn weaving density Wt and the weft yarn weaving density Wy of the glass fiber fabric each are from 3.0 to 50 yarns/25 mm, and the degree of widening of warp yarn Et and the degree of widening of weft yarn Ey of the glass fiber fabric each are from 0.70 to 1.10.