Abstract: The present invention is a method of rotationally molding an article having a layer made of polyamide composition. The method comprises the steps of melt blending a polyamide composition comprising the polyamide and a copolymer comprising units derived from an alpha-olefin of the formula RCH.dbd.CH.sub.2 where R is H or an alkyl having from 1 to 8 carbon atoms and from 0.2 to 25 mole percent based on the alpha-olefin-acid copolymer of an alpha, beta-ethylenically unsaturated carboxylic acid having from 3 to 8 carbon atoms. The copolymer has from 10% to 90% of the carboxylic groups neutralized by metal ions. The melt blended composition is formed into particles, including pellets and powder, suitable for rotational molding. The particles are rotationally molded to form an article.

Abstract: Reinforced thermoplastic polymer composite sheets, formable into smooth, shaped objects in a stamping process. The composite sheet is produced by laminating together (1) a first layer of thermoplastic resin containing short glass fibers and a mineral filler such as kaolin, (2) a backing reinforcing layer comprising a long glass mat impregnated by thermoplastic resin and (3) optionally a third layer similar to said first layer. The long glass mat is positioned within the reinforcing layer during impregnation, whereby the mat becomes encased in a resin matrix.

Abstract: A method of rotationally molding a multi-layered article. The outer layer is first rotationally molded and solidified. An inner polymer layer is fed into the mold cavity and an inner layer is rotationally molded to the inner surface of the outer layer. Preferably, the outer layer and inner layer are thermoplastics. The outer layer polymer has a melting point higher than the inner layer polymer. The outer layer is rotationally molded and cooled to below its melt temperature but above the melt temperature of the inner layer polymer. The inner layer is then rotationally molded while the outer layer remains solid.

Abstract: Fiber reinforced thermoplastic laminate is formed by extruding first and second sheets of thermoplastic resin containing nonsiliceous fibers. A layer of nonsiliceous fibers is applied to one side of the first sheet. The second sheet is laminated to the first sheet and the layer of nonsiliceous fibers at a temperature ranging from the melting point of the thermoplastic resin to about 650.degree. F.

Abstract: Reinforced thermoplastic polymer composite sheets, formable into smooth, shaped objects in a stamping process. The composite sheet is produced by laminating together (1) a first layer of thermoplastic resin containing short nonsiliceous fibers and a mineral filler such as kaolin, (2) a backing reinforcing layer comprising a long nonsiliceous fiber mat impregnated by thermoplastic resin and (3) optionally a third layer similar to said first layer. The long fiber mat is positioned within the reinforcing layer during impregnation, whereby the mat becomes encased in a resin matrix.

Abstract: Reinforced thermoplastic polymer composite sheets, formable into smooth, shaped objects in a stamping process. The composite sheet is produced by laminating together (1) a first layer of thermoplastic resin containing short glass fibers and a mineral filler such as kaolin, (2) a backing reinforcing layer comprising a long glass mat impregnated by thermoplastic resin and (3) optionally a third layer similar to said first layer. The long glass mat is positioned within the reinforcing layer during impregnation, whereby the mat becomes encased in a resin matrix.

Abstract: Glass fiber reinforced thermoplastic laminate is formed by extruding first and second sheets of thermoplastic resin containing glass fibers. A layer of glass fibers is applied to one side of the first sheet. The second sheet is laminated to the first sheet and the layer of glass fiber at a temperature ranging from the melting point of the thermoplastic resin to about 650.degree. F.

Abstract: The addition to filled thermoplastic resin systems of small amounts of fibrous material, of aspect ratio at least about 10 times the aspect ratio of the filler, facilitates dispersion and processing of these filled compositions into shaped articles and gives a product exhibiting superior surface properties.

Abstract: Reinforced thermoplastic polymer composite sheets, formable into smooth, shaped objects in a stamping process. The characterizing constitutents of the composite sheet are: (1) a first layer of thermoplastic resin containing short glass fibers and a mineral filler such as kaolin, (2) a backing reinforcing layer comprising a long glass mat encased in a resin matrix and (3) optionally a third layer similar to said first layer.

Abstract: The addition to filled thermoplastic resin systems of small amounts of fibrous material, of aspect ratio at least about 10 times the aspect ratio of the filler, facilitates dispersion and processing of these filled compositions into shaped articles and gives a product exhibiting superior surface properties.

Abstract: The addition to filled thermoplastic resin systems of small amounts of fibrous material, of aspect ratio at least about 10 times the aspect ratio of the filler, facilitates dispersion and processing of these filled compositions into shaped articles and gives a product exhibiting superior surface properties.