The present disclosure provides a method for processing a PVC ball, including: Step A: carrying out a first ball shaping of a PVC paste located inside a first mold using a roto-cast machine or a rotational molding machine, to produce a hollow PVC ball; Step B: charging a gas to an interior of the shaped ball, so that the ball has an external diameter equal to a diameter of an inner cavity of a second mold; and Step C: placing the gas-charged ball into the second mold, then carrying out a second texture shaping of the shaped gas-charged ball located inside the second mold using the roto-cast machine or the rotational molding machine, to produce a texture on a surface of the shaped PVC ball. This method can produce a PVC ball having a predetermined texture and a predetermined pattern.

A method for continuously producing a composite material is disclosed. In some implementations, the method includes supplying a thermoplastic resin having an initial density, mixing polypropylene-graft-maleic anhydride (PPgMA) formed of a plurality of interconnected PPgMA molecules throughout the thermoplastic resin, distributing a plurality of carbon particles throughout the thermoplastic resin and the plurality of interconnected PPgMA molecules, and forming, by rotational molding, the composite material based on a combination of the thermoplastic resin, the PPgMA, and at least some of the plurality of carbon particles.

The present invention relates to a polymer latex comprising: (A) particles of a latex polymer (A) obtainable by free-radical emulsion polymerization of a mixture of ethylenically unsaturated monomers the latex polymer comprising a plurality of functional groups (x); and (B) a compound bearing a beta-hydroxy ester linkage and at least one additional functional group (y) reactive with the functional groups (x) on latex polymer (A),to a method for preparation of said polymer latex, to its use, to a method for dip-molding and to articles obtained from the latex.

Provided is a method of preparing a biodegradable film, which comprises the steps of coating a soluble supporting solution on a substrate, coating a prepolymer solution, pre-drying, crosslinking, and separating. With the technical means, the method can separate the biodegradable film from the substrate smoothly, thereby ensuring the film integrity of the produced biodegradable film.

A method of manufacturing a boat hull comprising: forming a foam mold of a predetermined shape and size from one or more pieces of foam; cutting, into said foam, at least one “C” channel running in a longitudinal or a lateral direction within the foam; and coating said foam with at least one layer of reinforcing fiber and resin.

Compositions may include a polymer melt blend composition prepared from two polyethylene copolymers having different densities, wherein the polymer melt blend composition possesses improved flowability and impact resistance for low thickness rotomolding applications. Low thickness articles may include a polymer melt blend composition prepared from two polyethylene copolymers having different densities, wherein the articles possess improved finishing properties. Rotomolding processes may include melt blending from two polyethylene copolymers having different densities, pulverizing the melt blend, and rotational molding the composition thereof.

The present invention is directed to the production of shipping containers, computer server farm containers, and other forms of physical storage containers from a carbon nanotube-based fiber material with the potential application of other, non-carbon, nano-based materials containing various structures. Current materials used for shipping containers, computer server farm containers, and other forms of physical storage containers are heavier than the present invention and lack the ability to withstand high-intensity shock vibrations and other disturbances and are vulnerable to radiofrequency (“RF”) radiation. Instead of using metal, which is the currently preferred material used in the development of shipping containers, computer server farm containers, and other forms of physical storage containers, the present invention provides the use of a carbon nanotube-based material.

A glove including a cured film of an elastomer containing a (meth)acrylonitrile-derived structural unit, an unsaturated carboxylic acid-derived structural unit and a butadiene-derived structural unit in a polymer main chain, wherein the elastomer contains 20 to 40% by weight of a (meth)acrylonitrile-derived structural unit, 1 to 10% by weight of an unsaturated carboxylic acid-derived structural unit and 50 to 75% by weight of a butadiene-derived structural unit, and has a crosslinked structure of a carboxyl group in the unsaturated carboxylic acid-derived structural unit with an epoxy crosslinker containing an epoxy compound having three or more epoxy groups in one molecule.

Provided is a dip molding composition containing at least a nitrile rubber elastomer containing a carboxyl group and an amide group. In this dip molding composition, the elastomer contains 50% by weight or more, 78% by weight or less of a conjugated diene monomer-derived structural unit, 17% by weight or more, 35% by weight or less of an ethylenically unsaturated nitrile monomer-derived structural unit, 2.0% by weight or more, 8.0% by weight or less of an ethylenically unsaturated carboxylic acid monomer-derived structural unit, and 0.5% by weight or more, 5.0% by weight or less of an amide group-containing monomer-derived structural unit, and has an MEK-insoluble content of 50% by weight or more, 80% by weight or less.

This application relates to a microneedle patch, a method of manufacturing a microneedle patch, and an apparatus for manufacturing a microneedle patch. In one aspect, the method includes filling a mold having a plurality of needle grooves with a base material and creating a subatmospheric pressure in the mold. The method may also include rotating the mold about a rotation axis and drying the base material filled in the needle grooves.