A method for manufacturing a polyimide composite film for a flexible metal-clad substrate includes the following steps, providing a polyamide acid solution; providing fluorine polymer particles and mixing the fluorine polymer particles with a dispersant and an organic solution to prepare a fluorine polymer particle dispersion; forming a colloidal polyimide film from the polyamide acid solution; and coating the colloidal polyimide film with the fluorine polymer particle dispersion and then performing baking to form a polyimide composite film.

The present invention relates to a process for crosslinking polysaccharides from macroalgae to yield a polymer material in a processing chamber. The process includes the steps of producing a mixture comprising a solid containing polysaccharide from macroalgae and a water-containing liquid, with a ratio of liquid to solid of between 3:1 and 1:9, adjusting a pressure acting on the mixture to at least the vapour pressure of water at a first temperature, the first temperature being greater than/equal to 100° Celsius, and heating the mixture to the first temperature, wherein the solid comprises as polysaccharide at least one of alginate, alginic acid, agar and/or Carrageenan. The invention further relates to a process for producing a biopolymer product from such a polymer material in an apparatus comprising a processing chamber and a shaping apparatus. The invention also relates to a biopolymer product obtained by such a process.

According to one embodiment, a system for manufacturing a fully impregnated thermoplastic prepreg includes a mechanism for moving a fabric or mat and a drying mechanism that removes residual moisture from at least one surface of the fabric or mat. The system also includes a resin application mechanism that applies a reactive resin to the fabric or mat and a press mechanism that presses the coated fabric or mat to ensure that the resin fully saturates the fabric or mat. The system further includes a curing oven through which the coated fabric or mat is moved to polymerize the resin and thereby form a thermoplastic polymer so that upon exiting the oven, the fabric or mat is fully impregnated with the thermoplastic polymer. During at least a portion of the process, humidity in the vicinity of the coated fabric or mat is maintained at substantially zero.

Provided herein according to some embodiments is a dual cure additive manufacturing resin, comprising: (i) a light polymerizable component, (ii) a photoinitiator, (iii) a heat polymerizable component, and (iv) a non-reactive diluent, which resin is useful for the production of three-dimensional objects by additive manufacturing. Methods of using the same are also provided.

A process for crosslinking a polymer, includes at least the following steps: a) providing a polymer; b) providing a crosslinking agent; c) carrying out one or more crosslinking steps in the presence of the polymer and the crosslinking agent; d) obtaining a crosslinked polymer; wherein the crosslinking step or each of the crosslinking steps is carried out at constant temperature or at a temperature that varies linearly or in a stepwise manner, the constant or variable temperature being less than or equal to 15° C., and in that the crosslinking step c) has a duration of between 3 and 72 hours.

A cured object and a method for producing the same are disclosed herein. In some embodiments, the method of producing a cured object includes introducing a resin composition including a resin and magnetic powder into one or more slots of a tubular object, wherein the resin composition includes a resin and a magnetic powder, wherein the tubular object includes a penetration space and an edge region having the one more slots formed therein, and wherein the penetration space and the one or more slots are formed in a longitudinal direction of the tubular object; inserting a solenoid coil into the penetration space of the tubular object; and generating a magnetic field with the solenoid coil to cure the resin present in the one or more slots of the tubular object.

The cured resin object can also have excellent withstand voltage characteristics.

Provided is a hydrosilylation reactive composition that can be used to obtain an organopolysiloxane cured product having high adhesiveness and sufficient mechanical strength, and a method for manufacturing a cured product using this composition. The composition comprises: (A) a compound including at least one monovalent hydrocarbon group with an aliphatic unsaturated bond per molecule; (B) a compound including at least two hydrogen atoms bonded to a silicon atom per molecule; (C) a first hydrosilylation catalyst; and (D) a second hydrosilylation catalyst including platinum, rhodium, ruthenium, or iridium and exhibiting activity at a temperature at least 30° C. higher than the temperature at which component (C) exhibits activity. Also provided is a method for conducting a hydrosilylation reaction at two different temperature levels using this composition.

A method of preparing a vinyl collagen microsphere polyamide fiber composite material includes the following steps: step 1: modifying a collagen with methacrylic anhydride to obtain a vinyl collagen, then emulsifying and cross-linking the vinyl collagen to obtain vinyl collagen microspheres; step 2: treating a polyamide fiber substrate with formaldehyde to obtain a hydroxylated polyamide fiber substrate, treating the hydroxylated polyamide fiber with (3-mercaptopropyl)trimethoxysilane (MPS) to obtain a sulfhydrylated polyamide fiber substrate; and step 3: modifying the sulfhydrylated polyamide fiber substrate with the vinyl collagen microspheres to obtain the vinyl collagen microsphere polyamide fiber composite material.

A method for manufacturing a self-disinfecting glove, the method comprising dissolving an elastomer in a solvent to form a solution, wherein the elastomer is selected from the group consisting of synthetic rubber, natural rubber, and nitrile. Adding of a photosensitizer to the elastomer solvent solution and evaporating the solvent solution to form a film, wherein the photosensitizer is selected from the group consisting of methylene blue, hypericin and titanium dioxide. Next hot pressing of the film above elastomer's melting point to form a sheet. Finally cutting, stacking and hot pressing the sheet again to enable even spread of the photosensitizer throughout the sheet.

The present invention relates to expandable, polymerizable compositions comprising at least one benzoxazine and at least one cyclic carbonate, to polymerization products of these expandable, polymerizable compositions, to a process for preparing these polymerization products as well as to uses of these expandable, polymerizable compositions. The present invention is based on the surprising finding that copolymerizing benzoxazine monomers with cyclic carbonate monomers results in novel copolymers having unforeseeably high expansion rates, wherein the properties (e.g. solid/brittle, solid/soft, rubbery) of the resulting copolymers can be easily and reproducibly tuned/adjusted, depending on the ratio of the benzoxazine equivalents/cyclic carbonate equivalents present in the composition and copolymer, respectively.