33 results about "Electrical insulation paper" patented technology

The present disclosure relates to an aramid paper for a honeycomb, which is prepared by mixing, with an aramid floc, an aramid pulp having a fiber length equal to or longer than a predetermined length and a fibril development equal to or higher than a predetermined level, at a predetermined ratio, a wholly aromatic aramid paper for an electrical insulation paper having superior paper formation property and thus having uniform electrical insulation property, which is prepared by mixing an aramid pulp having a fines content equal to or higher than a predetermined ratio at a predetermined ratio, a laminated aramid paper having a uniform thermal expansion coefficient, uniform electrical conductivity and uniform thermal conductivity, which is prepared by laminating an aramid paper with superior paper formation property on an aramid paper with superior paper strength by calendering, and a method for preparing the same. The aramid paper according to the present disclosure is applicable to a material or a component which requires precision with little difference in physical properties such as a thermal expansion coefficient, electrical conductivity and thermal conductivity. Specifically, it is applicable to a honeycomb, an electrical insulation paper, a PCB substrate, etc. because it has superior paper strength and paper formation property. Moreover, the method for preparing an aramid paper can solve the problems of poor transfer of a base paper, nonuniformity of strength and aggregation between flocs.

The invention relates to an insulating tape material, a method for production and usage thereof, particularly one for producing electrical insulation paper such as mica paper, which is contained in thermally conductive insulating tapes that are used for high-voltage insulation, for example. The insulating tape material has fibre reinforcement by means of a fabric, wherein the meshes of the fabric are filled by a particle composite which is preferably thermally conductive.

A process including shearing a first dispersion medium and a second dispersion medium under conditions that precipitate a plurality of polymeric fibers; and collecting the plurality of polymeric fibers at a rate of at least 300 grams / hour. The first dispersion medium is a solution including at least one polymeric component. The at least one polymeric component includes a polyetherimide component selected from the group consisting of polyetherimide homopolymers, polyetherimide co-polymers, polyetherether ketones homopolymers, polyetherether ketones copolymers, polyphenylene sulfones homopolymers, polyphenylene sulfones copolymers, and combinations thereof. Products produced by the process can be non-woven paper, medical implants, ultra-fine filters, membranes, hospital gowns, electrical insulation paper, honeycomb structures and personal hygiene products, dialyzers, blood, oxygenator filters, intravenous (IV) filters, diagnostic test filters, and blood / apheresis filters.

The invention discloses a preparation method of para-aramid and meta-aramid electrical insulation paper. The method comprises the following steps that para-aramid chopped fibers are preprocessed for use; meta-aramid chopped fibers are preprocessed; the preprocessed para-aramid chopped fibers and the preprocessed meta-aramid chopped fibers are mixed in a fluffer for primary defibering; then meta-aramid pulp fibers are added for secondary defibering; lastly, a dispersing agent is added for third defibering, and suspension liquid is obtained; the obtained suspension liquid is injected into a sheet forming device for dewatering forming, and body paper of the aramid electrical insulation paper is obtained after pressing and drying treatment; the obtained body paper of the aramid electrical insulation paper is subjected to hot press molding, and the aramid electrical insulation paper is obtained. According to the preparation method of the aramid electrical insulation paper, different ratios of the para-aramid chopped fibers to the meta-aramid chopped fibers are adopted, and the aramid electrical insulation paper with high strength and good dielectric properties is prepared.