摘要:
The invention relates to a method for manufacturing a lengthy body comprising high performance polyethylene fibres and a polymeric resin comprising the steps of applying an aqueous suspension of a polymeric resin to HPPE fibres, assembling the HPPE fibres, partially drying the aqueous suspension, optionally applying a temperature, tension and/or a pressure treatment to the lengthy body wherein the polymeric resin is a homopolymer or copolymer of ethylene and/or propylene. The invention further relates to lengthy bodies obtainable by said method and articles comprising the lengthy body such nets, round slings, splices, belts or synthetic chain links.
摘要:
The invention relates to a method for manufacturing a composite sheet comprising high performance polyethylene fibres and a polymeric resin comprising the steps of assembling HPPE fibres to a sheet, applying an aqueous suspension of a polymeric resin to the HPPE fibres, partially drying the aqueous suspension, optionally applying a temperature and/or a pressure treatment to the composite sheet wherein the polymeric resin is a homopolymer or copolymer of ethylene and/or propylene. The invention further relates to composite sheets obtainable by said method and articles comprising the composite sheet such as helmets, radomes or a tarpaulins.
摘要:
The present invention provides a process for preparing a pre-treated low Dk-type glass fabric for constituting a circuit board, comprising pre-treating low Dk-type glass fabric with a pre-treating varnish having a Dk close to the Dk of the used low Dk-type glass fabric at different temperatures and having a small Df. The present invention further provides a bonding sheet and a circuit board prepared thereby. The circuit boards prepared by the preparation process of the present invention have a Dk having small differences in warp and weft directions, and can effectively solve the problem of signal propagation delay. The circuit boards have a small Df, so as to have a small signal loss. Meanwhile, the cured, partially-cured or uncured dry glue obtained after drying the solvent of the pre-treating varnish has similar dielectric properties at different temperatures to the used low Dk-type glass fabric, so that the circuit boards have a very small signal propagation delay at different temperatures.
摘要:
Provided are: chopped carbon fiber bundles which have high fluidity without decreasing the dispersibility of carbon fibers and the physical properties of a molded product; and a method for producing chopped carbon fiber bundles with high productivity. Chopped carbon fiber bundles, each of which contain a carbon fiber bundle having a total fineness of from 25,000 dtex to 45,000 dtex (inclusive) and a sizing agent in an amount of from 1% by mass to 5% by mass (inclusive) relative to the total mass of the chopped carbon fiber bundle. The length (L) of each chopped carbon fiber bundle along the fiber direction of the carbon fiber bundle is from 1 mm to 50 mm (inclusive); the ratio of the longest diameter (Dmax) to the shortest diameter (Dmin) of a cross section perpendicular to the fiber direction of each chopped carbon fiber bundle, namely Dmax/Dmin is from 6.0 to 18.0 (inclusive); and the orientation parameter of the single fibers present in the surface of each chopped carbon fiber bundle is 4.0 or less.
摘要:
There is disclosed a glass-fiber coating liquid for forming a coating layer on a glass fiber cord, prepared in the form of an emulsion by dispersing a phenol resin, a vinylpyridine-stylene-butadiene copolymer (B) and a chlorosulfonated polyethylene (C) into water to form a coating layer on a glass fiber cord, wherein the phenol resin is a monohydroxybenzene-formaldehyde resin (A) obtained by reaction of monohydroxybenzene (D) and formaldehyde (E).
摘要:
The present invention relates to a carbon fiber bundle to which an amino group-containing modified polyolefin resin has applied, wherein the amount of applying amino group-containing modified polyolefin resin is 0.2 to 5.0% by mass. This carbon fiber bundle can be produced by applying 0.2 to 5.0% by mass of the amino group-containing modified polyolefin resin to the surface of the carbon fiber bundle. The present invention can exhibit excellent interface adhesion to a polyolefin resin, particularly to a polypropylene resin, and can provide a carbon fiber bundle useful for reinforcing the polyolefin resin and a method of producing the same.
摘要:
The invention relates to a sizing composition for reinforcing fibres, which makes it possible to improve the adhesion of these fibres with respect to an organic matrix that forms, with them, a part made of a composite material and that results from the chain transfer polymerization of a curable resin, and also to applications of this composition. The sizing composition comprises a polybutadiene prepolymer comprising at least two epoxide functions, a crosslinking agent comprising at least two reactive functions, at least one of which is a thiol function, and a catalyst comprising at least one tertiary amine function. Fields of use: aeronautical, aerospace, railway, naval and motor vehicle industries, for example for the production of structural, engine, passenger compartment or body work parts; arms industry, for example for the production of parts incorporated into the composition of missiles or missile launch tubes; sports and leisure goods industry, for example for the production of goods intended for water sports and board sports.