Provided is a composite laminate having excellent releasability from a mold during a production process, excellent surface appearance (surface smoothness) and mechano-physical properties, and excellent workability and coating adhesion. A composite laminate 1 includes an A layer 2 and a B layer 3, wherein the A layer 2 is provided directly or indirectly on one or both sides of the B layer 3, the A layer 2 contains reinforcing fibers (a1) with an average fiber length of 1 μm to 300 μm, spherical particles (a11) with a volume mean particle diameter of 0.01 μm to 100 μm, and a thermoplastic resin (a2), and the B layer 3 contains reinforcing fibers (b1) with an average fiber length of 1 mm or more and a thermoplastic resin (b2).

A fiber-reinforced resin molding material molded product includes a fiber-reinforced resin molding material prepared by impregnating chopped fiber bundles obtained by cutting a reinforcing fiber bundle with a matrix resin, wherein in a region excluding 30 mm from an edge of the molded product, when an arbitrary rectangular region having an area of 40 mm.sup.2 or more and defined by a thickness of the molded product and a width in a direction perpendicular to a thickness direction of the molded product is set in a cross section in an arbitrary thickness direction of the molded product, with respect to a bundle thickness of the chopped fiber bundles present in the set rectangular region.

A preparation method and a product of thermoplastic carbon fiber fabric prepreg are provided. The preparation method includes: covering a thermoplastic polyimide non-woven fabric on a carbon fiber fabric to obtain a laminated structure, pressing the laminated structure, then spraying polyphenylene sulfide nanoparticles onto the thermoplastic polyimide non-woven fabric, and performing a two-stage hot melting preparation process which includes: in a first stage, heating up to make the polyphenylene sulfide nanoparticles be melted and infiltrate and keeping a hot melting time of 5-10 min; and in a second stage, heating up to make the thermoplastic polyimide non-woven fabric be melted and infiltrate into the carbon fiber fabric and cooling down after a duration of heat preservation to prepare the thermoplastic carbon fiber fabric prepreg. The thermoplastic carbon fiber fabric prepreg prepared by the two-stage hot melting has high strength and may be stored for a long period.

The invention provides a method for preparing tissue-adhesive sheets that may suitably be applied as an implantable haemostatic or sealing construct during surgical procedures, said method comprising: providing a fibrous sheet comprising a three-dimensional interconnected interstitial space; providing reactive polymer particles comprising a water-soluble electrophilic polymer carrying at least 3 reactive electrophilic groups that are capable of reacting with amine groups in blood under the formation of a covalent bond; placing the fibrous sheet and the reactive polymer particles between two electrodes; simultaneously subjecting the fibrous sheet and the reactive polymer particles to an electric field of 0.1 to 40 kV/mm to impregnate the interconnected interstitial space of the fibrous sheet with the reactive polymer particles.

Additive fabrication methods for 3D composite objects having preform fiber reinforcements embedded in a matrix material include providing local heat and mechanical energy to at least partially melt, impregnate and solidify the matrix material forming at least one reinforced composite layer of the object. Successive layers are added in accordance to a computer generated tool path to form a three dimensional object with useful features.

A process for producing a stable fabric comprising: 1) providing a first fabric formed from reinforcing fibers, 2) providing an elastic nonwoven web produced from elastic fibers, having softening temperature lower than said reinforcing fibers, on at least lone side of said first fabric to form a structure, 3) heating said structure to a temperature between the softening temperature and melting temperature of said nonwoven web, and 4) cooling said structure to thereby provide a stable two-dimensional fabric. In the preferred embodiment, the structure of step 2) is put into a mold prior to heating step 3), heating said structure in the mold according to step 3), cooling said structure in the mold according to step 4) and thereby providing a three-dimensional shaped article. A product is also provided produced by these processes.

A prepared mold tool having a thermoplastic surface layer polymer coating on the mold surface of the mold tool or prepared prepreg having a thermoplastic surface layer polymer coating on the surface of the thermoplastic fiber reinforced prepreg are described that enhance first ply laydown of thermoplastic fiber reinforced composite prepregs onto mold tools for prepreg forming or in situ tape placement. Resulting thermoplastic fiber reinforced composite parts from a thermoplastic fiber reinforced thermoplastic composite material having structural reinforcement fibers with one or more high performance polymers, and a thermoplastic surface layer polymer coating which forms a polymer blend with the high performance polymers of the thermoplastic fiber reinforced composite material thereby imparting improved properties, and methods for making and using same, are provided herein.

A fiber-reinforced resin molding material molded product includes a fiber-reinforced resin molding material prepared by impregnating chopped fiber bundles obtained by cutting a reinforcing fiber bundle with a matrix resin, wherein in a region excluding 30 mm from an edge of the molded product, when an arbitrary rectangular region having an area of 40 mm.sup.2 or more and defined by a thickness of the molded product and a width in a direction perpendicular to a thickness direction of the molded product is set in a cross section in an arbitrary thickness direction of the molded product, with respect to a bundle thickness of the chopped fiber bundles present in the set rectangular region.

The invention provides a powder pre-preg comprising as sole resin a vinyl ester resin having a Tg in the range of −5 to +30° C. and a melt viscosity @100° C. in the range of 2 to 75 dPa.Math.s, which can be used in making a composite at a temperature as low as 80° C.

An apparatus and method for the automated manufacturing of three-dimensional (3D) composite-based objects is disclosed. The apparatus comprises a material feeder, a printer, a powder system, a transfer system, and optionally a fuser. The method comprises inserting a stack of substrate sheets into a material feeder, transferring a sheet of the stack from the material feeder to a printer, depositing fluid on the single sheet while the sheet rests on a printer platen, transferring the sheet from the printer to a powder system, depositing powder onto the single sheet such that the powder adheres to the areas of the sheet onto which the printer has deposited fluid, removing any powder that did not adhere to the sheet, optionally melting the powder on the substrate, and repeating the steps for as many additional sheets as required for making a specified 3D object.