Provided are multi-beam meltblowing apparatuses having a ridged collecting surface, methods for making multilayer meltblown composites using such apparatuses, and multilayer meltblown composites made therefrom. Also provided are a multilayer composite comprising an elastic layer and at least one ridged layer and a method for making the multilayer composite.

A dip-molding composition of the present invention contains a latex (A) of a nitrile-group-containing highly saturated copolymer rubber (a). The nitrile-group-containing highly saturated copolymer rubber (a) contains an ,-ethylenically unsaturated nitrile monomer unit and a conjugated diene monomer unit, and being obtained by hydrogenating at least part of the conjugated diene monomer unit. A dip-molded article of the present invention is produced by dip molding of the above dip-molding composition.

A release agent for vulcanized rubber molding is provided which has excellent mold releasing properties and washability. This release agent for vulcanized rubber molding contains an alkylene oxide adduct (A) of an amine compound having 4-8 active hydrogen atoms in the molecule, wherein the aforementioned alkylene oxide adduct (A) of an amine compound has a number average molecular weight of 5000-30000, and contains 50-95 mass % of an oxyethylene group.

The present Invention' relates to a method of preparing reduced grapheme oxide, Incorporation of the adduced graphene oxide into polyisoprene latex to provide a polyisoprene latex graphene composite and elastomerk articles prepared using the polyisoprene latex-graphene composite. In particular, the reduction of-graphene oxide is accomplished without the use of strong reducing agents and organic solvents and incorporation of die reduced graphene oxide into polyisoprene latex Is accomplished using room temperature latex mixing method or hot maturation. The resultant composite exhibits good colloid stability and polyisoprene latex films produced from the composite exhibit good mechanical properties with improved ageing resistance.

The present invention is a method for manufacturing inflatable articles, or bladders for inflatable articles, that is time-efficient, simple, inexpensive and permits the uninterrupted manufacture of numerous and even customized article or bladder configurations and sizes, without expensive configuration-specific, metal tooling. The method includes the steps of applying a barrier material to a side of a first film, providing a second film with the first film so that the barrier material is disposed between the first and second films, adhering the first film to the second film so that the films are sealed together in areas except where the barrier material has been applied to form at least one inflatable compartment and sealed peripheral edge, and cutting along the sealed peripheral edge to form an inflatable article or bladder for use in an article of manufacture. The barrier material may be a paint, ink, paper or surface treatment that effectively prevents the first film from adhering to the second. The inflatable article or bladder of the present invention may be used as or in athletic equipment, for example, including footwear.

The present invention is a method for manufacturing inflatable articles, or bladders for inflatable articles, that is time-efficient, simple, inexpensive and permits the uninterrupted manufacture of numerous and even customized article or bladder configurations and sizes, without expensive configuration-specific, metal tooling. The method includes the steps of applying a barrier material to a side of a first film, providing a second film with the first film so that the barrier material is disposed between the first and second films, adhering the first film to the second film so that the films are sealed together in areas except where the barrier material has been applied to form at least one inflatable compartment and sealed peripheral edge, and cutting along the sealed peripheral edge to form an inflatable article or bladder for use in an article of manufacture. The barrier material may be a paint, ink, paper or surface treatment that effectively prevents the first film from adhering to the second. The inflatable article or bladder of the present invention may be used as or in athletic equipment, for example, including footwear.

The invention relates to a method and a device for demolding annular elastomeric molded parts from a mold core of an injection mold which has an inner mold core (1) and outer mold jaws and in which the molded parts (9) are produced parallel to one another in annular mold cavities (5) of the mold core (1). According to the invention, after removal of the outer mold jaws, the mold core (1), which contains the produced elastomeric molded parts (9) on the surface thereof, is set at such a high rotational speed about the longitudinal axis thereof that the internal diameter of the elastomeric molded parts (9) is increased because of centrifugal force to such an extent that the molded parts (9) are released from the mold cavities (5) and can be removed from the mold core (1) in the axial direction (10) while they are still rotating.

A process for production of expanded thermoplastic elastomer beads in the presence of a gaseous medium that surrounds thermoplastic elastomer beads. The process comprises a) an impregnating step, in which the gaseous medium has an impregnating temperature T.sub.a, and the absolute pressure of the gaseous medium is greater than ambient pressure, the thermoplastic elastomer beads impregnated with a blowing agent, b) an expanding step, in which the thermoplastic elastomer beads expand as they are exposed to a pressure reduction at a first expanding temperature T.sub.b, and c) optionally a fusing step, in which the expanded thermoplastic elastomer beads are fused together at a fusing temperature T.sub.c to form at least one shaped part.

In one aspect, the present disclosure provides a polymer film with a low glass transition temperature. In one embodiment, when in contact with a metal substrate, the polymer film adheres to the metal substrate under heating and/or mechanical pressure. In one embodiment, the polymer film comprises a butadiene copolymer and a butylene polymer. In another aspect, the present disclosure further provides a method of masking a metal substrate using the polymer film. In yet another aspect, the present disclosure provides a method of chemically or electrochemically processing a metal substrate that is masked with the polymer film.

A method of manufacturing a rubber product by bonding thin pieces on a manufacturing table includes an adhesion prevention treatment step of treating uncrosslinked rubber powder to prevent mutual adhesion, a first raw rubber powder supply step of supplying raw rubber powder, treated for adhesion prevention, onto the surface of the manufacturing table, a first crosslinking step of irradiating with an electron beam to crosslink the irradiated portion, a post-treatment step of aligning the surface of the crosslinked portion with the surface of the manufacturing table, a second raw rubber powder supply step of supplying the raw rubber powder onto the surface of the manufacturing table, including the surface of the crosslinked portion, and a second crosslinking step of irradiating with an electron beam to crosslink the irradiated portion. The post-treatment, second raw rubber powder supply, and second crosslinking steps are sequentially repeated to bond the thin pieces.