6results about How to "Low relative permittivity" patented technology

The purpose of the present invention is to provide a cyclic olefin polymer resin foam sheet which maintains the stability of mechanical properties or thermal properties and achieves excellent light reflection properties and dielectric properties (low relative permittivity and low dielectric loss factor) and surface quality. The present invention obtains a cyclic olefin polymer resin foam sheet which comprises either a monomer of a cyclic olefin homopolymer (A) or a monomer of a cyclic olefin copolymer (B), or a mixture of the cyclic olefin homopolymer (A) and the cyclic olefin copolymer (B), and which has an average bubble diameter of 1-20 [mu] m. As a result, it is possible to obtain a cyclic olefin polymer resin foam sheet having excellent light reflection properties, dielectric properties (low relative dielectric constant, low dielectric loss factor) and surface quality.

The present invention relates to a resin composition, a laminate and a multilayer printed wiring board. The present invention relates to a resin composition comprising (A) a maleimide compound having a saturated or unsaturated divalent hydrocarbon group and a thermoplastic resin.

The film for a circuit board of the present disclosure contains an inherently microporous polymer. For example, the porosity of the film is 15% or more and 50% or less. For example, the average pore diameter of the fine pores possessed by the film is 0.3 nm or more and 6 nm or less. For example, the thickness of the film is 30 µm or more and 1.0 mm or less. The circuit board of the present disclosure is provided with an insulating layer containing an inherently microporous polymer. The transmission method of the present disclosure transmits a high-frequency signal to the circuit board of the present disclosure. The method for manufacturing the film for a circuit board of the present disclosure includes the following steps: dissolving an inherently microporous polymer in a solvent to prepare a solution, applying the solution to a support to form an applied film, and removing the solvent from the applied film.

The invention discloses a method for deodorizing donkey-hide gelatin powder, and relates to the technical field of donkey-hide gelatin powder.The method comprises the steps that S1, donkey hide is obtained, hair and meat on the donkey hide are removed, and the donkey hide is washed with ultrapure water; s2, adding the donkey hide into a sodium carbonate solution, and heating and boiling; s3, carrying out subcritical water gelatin extraction on the donkey skin, ultrapure water and rock candy, and carrying out a glycosylation reaction; s4, mixing the donkey hide with yellow rice wine and soybean oil, boiling and fusing to obtain donkey-hide gelatin; s5, drying the donkey-hide gelatin, and carrying out a secondary glycosylation reaction; s6, performing superheated steam treatment on the donkey-hide gelatin; and S7, refining the donkey-hide gelatin to obtain the donkey-hide gelatin powder. The preparation method has the beneficial effects that the rock candy and the ultrapure water are added for subcritical water gelatin extraction, a glycosylation reaction is carried out to generate a certain flavor to cover the fishy smell, secondary glycosylation is carried out while drying is carried out through microwave treatment, then the fishy smell is dissipated through superheated steam treatment, and the problem that the fishy smell of the donkey-hide gelatin powder is heavy is solved.

The utility model relates to the technical field of network cables, in particular to a compatible vehicle-mounted Ethernet cable. A wrapping layer, a shielding layer and a sheath layer wrap the periphery of a core wire, the wrapping layer is formed by wrapping a composite belt, the composite belt is formed by sequentially stacking an aluminum foil layer, a plastic layer and an aluminum foil layer, the core wire comprises a conductor and an insulating layer, the insulating layer is of a three-layer co-extrusion structure, and the insulating layer comprises an inner layer, a center layer and an outer layer which sequentially wrap the conductor from inside to outside. Through the composite belt composed of the aluminum foil layer, the plastic layer and the aluminum foil layer, the structure of the twisted core wire is more stable, a better forming effect and a better shielding effect are achieved, meanwhile, the consistency of the distance between the conductor and the aluminum foil layer is guaranteed, and therefore the stability of wire return loss and mode conversion performance is guaranteed; the insulating layer of the core wire adopts a three-layer co-extrusion structure, so that stable adhesive force between the insulating layer and the conductor can be ensured, the wire has a lower relative dielectric constant, and the wire is ensured to meet basic conditions of 1G and 10G performance requirements.

The present invention relates to the field of insulating materials, and in particular to an insulating material and a preparation method and application thereof. The present invention provides an insulating material, comprising the following raw materials by weight: 60-90 parts of a polyolefin elastomer, 10-40 parts of a thermoplastic elastomer, 0.1-0.65 parts of an antioxidant, and 0.05-0.2 parts of a cross-linking agent; the polyolefin elastomer comprises an ethylene-octene copolymer; the thermoplastic elastomer comprises a hydrogenated styrene-butadiene block copolymer. The uniformity of the insulating material provided by the present invention is improved, and on the basis of maintaining the high temperature resistance of the polyolefin elastomer, the insulating performance and breakdown strength of the insulating material are improved, and the dielectric loss of the material is reduced.