Abstract: A method for manufacturing a heat resistant flexible laminate effectively enabling avoidance of not only visual defects but occurrence of dimensional changes, and a heat resistant flexible laminate are provided. In a process for laminating a heat resistant adhesive material and a metallic foil by thermal lamination, a film-like protective material is disposed between a pressurized surface and the metallic foil at the time of thermal lamination. At this time, coefficients of linear expansion in a temperature range of 200 degree C. to 300 degree C. of the heat resistant adhesive material and the protective material are within a range of a coefficient of linear expansion of the metallic foil ±10 ppm/degrees C. Thereby, occurrence of visual defects is not only effectively avoidable, but excellent dimensional change after etching may be exhibited.

Abstract: A bonding sheet that can be bonded with a metal foil by thermal lamination and has excellent adhesiveness and reduced warpage, and a one-side metal-clad laminate are provided. A bonding sheet has an adhesive layer containing a thermoplastic resin disposed on one side of a heat resistant film and a non-adhesive layer containing a non-thermoplastic resin and a thermoplastic resin disposed on the other side of the heat resistant film. The ratio of the non-thermoplastic resin to the thermoplastic resin in the non-adhesive layer is 82/18 to 97/3 on a weight basis.

Abstract: The present invention provides a method for producing a laminate suitable for a flexible circuit board which is free from visual defects such as wrinkles and curls that appear when a plurality of laminating materials containing a thermally fusible laminating material are formed by thermally laminating these materials each other using a thermal-press forming device, which comprises the steps of: arranging a heat resistant protective material between a pressing surface and the laminating materials, laminating the materials by thermal pressure at not lower than 200° C.

Abstract: A method for manufacturing a heat resistant flexible laminate effectively enabling avoidance of not only visual defects but occurrence of dimensional changes, and a heat resistant flexible laminate are provided. In a process for laminating a heat resistant adhesive material and a metallic foil by thermal lamination, a film-like protective material is disposed between a pressurized surface and the metallic foil at the time of thermal lamination. At this time, coefficients of linear expansion in a temperature range of 200 degree C. to 300 degree C. of the heat resistant adhesive material and the protective material are within a range of a coefficient of linear expansion of the metallic foil ±10 ppm/degrees C. Thereby, occurrence of visual defects is not only effectively avoidable, but excellent dimensional change after etching may be exhibited.

Abstract: A laminate having good appearance, which avoids such a problem that end waviness is produced in the laminate during lamination, thus making it impossible to fix the laminate in the process for formation of a circuit pattern. A method of producing a laminate is disclosed which comprises continuously laminating a heat-resistant film having thermal fusibility with a metallic foil, characterized in that the temperature of the ends of the laminate is the same as or higher than that of the center portion in the cooling process after lamination.

Abstract: A developing roller (10) comprising an elastic layer (12) wound round a conductive shaft (11) and one or more resin layers (13) laminated on the elastic layer. The elastic layer (12) has a JIS A hardness of not greater than 50 degrees. At least the outermost layer of the one or more resin layers (13) contains fine particles and the surface roughness (Rz) of the outermost layer is regulated to be within the range of 3 to 15 &mgr;m. A resin composition containing an —NHCO— bound or a resin composition containing —ROCO2— and —SiOSi— repeating units and an —NHCO— bond can be used for the outermost layer.

Abstract: A continuous process for producing reinforced resin laminates comprising the steps of impregnating a fibrous substrate with a liquid resin which is free of volatile solvent and is capable of curing without generating liquid and gaseous byproducts, laminating a plurality of the resin-impregnated substrates into a unitary member, sandwiching the laminate between a pair of covering sheets, and curing the laminate between said pair of covering sheets without applying appreciable pressure. The improvement comprises adjusting the final resin content in said resin impregnated substrate at 10 to 90% by weight based on the total weight of said impregnated substrate.

Abstract: An unsaturated polyester composition is provided comprising an unsaturate polyester component, a cross-linking monomer and as a modifier of the resin a polyoxyalkylene alcohol at least partially esterified with a polymerizable unsaturated carboxylic acid. The modifier is produced by esterifying the hydroxy group of a polyoxyalkylene mono- or polyalcohol at least partially with a polymerizable carboxylic acid such as a maleic acid.

Abstract: An unsaturated polyester composition is provided comprising an unsaturate polyester component, a cross-linking monomer and as a modifier of the resin a polyoxyalkylene alcohol at least partially esterified with a polymerizable unsaturated carboxylic acid. The modifier is produced by esterifying the hydroxy group of a polyoxyalkylene mono- or polyalcohol at least partially with a polymerizable carboxylic acid such as maleic acid.

Abstract: There is provided an electrical laminate comprising a cured assemblage of a plurality of glass fiber type substrates impregnated with a curable resin composition containing (a) a halogenated bisphenol type unsaturated polyester resin and (b) an epoxy acrylate resin which may optionally be halogen-containing. This laminate features high dimensional stability, improved through-hole reliability, and excellent mechanical strength. A continuous production method for laminates is also described.

Abstract: A continuous process for producing reinforced resin laminates is disclosed. A plurality of fibrous substrate is continuously and sequentially subjected to the steps of (a) impregnating with resin, (b) laminating into a unitary member, (c) sandwiching between a pair of covering sheet, at least one of which is a cladding metal foil, and (d) curing the resin while supporting between said covering sheets without applying pressure on the laminate surface.

Abstract: An electrical laminate comprising a plurality of fibrous cellulosic substrate layers and alternately interposed layers of cured epoxy or unsaturated polyester resin between the adjacent substrate layers, wherein each of the substrate layers is embedded in a matrix of said cured resin which is substantially integral with said layers of cured resin, and consists essentially of cellulosic fibers having thereon a coating of methylol group-containing resin such as aminoplast resins. The laminate may be unclad or cladded with a metal foil.

Abstract: A continuous process for producing reinforced resin laminates comprising the steps of impregnating a fibrous substrate with a liquid resin which is free of volatile solvent and is capable of curing without generating liquid and gaseous byproducts, laminating a plurality of the resin-impregnated substrates into a unitary member, sandwiching the laminate between a pair of covering sheets, and curing the laminate between said pair of covering sheets without applying appreciable pressure. The improvement comprises adjusting the final resin content in said resin impregnated substrate at 10 to 90% by weight based on the total weight of said impregnated substrate.

Abstract: A metal clad laminate is produced in continuous manner by impregnating a plurality of fibrous substrate with a curable liquid resin, combining said plurality of substrates together and simultaneously laminating a metal foil onto at least one side of said substrates, and curing the laminate. The improvement comprises the steps of applying an adhesive onto said metal foil to form a film and heating said film in situ continuously prior to step of laminating step of said metal foil.

Abstract: A flame-retarded copper-clad laminate is provided comprising a plurality of paper substrate layers each impregnated with an unsaturated polyester resin and a copper cladding adhesively bonded onto at least one side thereof.The improvement comprises said unsaturated polyester resin containing an aliphatic and/or alicyclic brominated flame-retardant and aromatic brominated flame-retardant in combination.

Abstract: A flame retarded copper clad laminate is provided comprising a plurality of paper substrate layers each impregnated with a halogen-containing unsaturated polyester resin containing about 1% to about 30% by weight of a basic filler, and a copper cladding adhesively bonded onto at least one side of the laminate.

Abstract: A continuous process for producing reinforced resin laminates comprising the steps of impregnating a fibrous substrate with a liquid resin which is free of volatile solvent and is capable of curing without generating liquid and gaseous byproducts, laminating a plurality of the resin-impregnated substrates into a unitary member, sandwiching the laminate between a pair of covering sheets, and curing the laminate between said pair of covering sheets without applying appreciable pressure. The improvement comprises adjusting the final resin content in said resin impregnated substrate at 10 to 90% by weight based on the total weight of said impregnated substrate.

Abstract: Variations in performance of metal clad reinforced resin laminates may be minimized by aging the laminates in a high-temperature, high-humidity atmosphere subsequent to the curing step. The products are useful for the production of printed circuit wiring boards.

Abstract: There is provided a method for continuous production of a laminated sheet product comprising transporting a plurality of continuous sheet component materials in vertically discrete relation, supplying an impregnating resin to each of the component materials, joining the resin-impregnated component materials to give an assembly and laminating a film material to either side of the assembly, all in a continuous sequence, the improvement wherein the resin-impregnated component materials are first transported in a substantially horizontal path, at least one substantially V-shaped or U-shaped path preceded by a declining path, and an ascending path in the order mentioned before the component materials are joined.

Abstract: Bubble- or void-free electrical laminates such as unclad or metal clad laminates are produced by impregnating a porous fibrous substrate with a solvent-free liquid resin capable of curing to a rigid state without producing a volatile by-product, combining a plurality of impregnated substrates to form a unitary member, allowing substantially all of entrapped air bubbles retained in the combination to disappear by dissolving into the liquid resin, and then curing the combination.