32results about How to "Improve dipping quality" patented technology

The invention relates to a fluororesin mixture, a copper-clad plate prepared therefrom and a manufacturing method thereof. The fluororesin mixture contains the following two substances as necessary components in 100 parts by weight of an organic solid substance: 90-99 parts of polytetrafluoroethylene (PTFE) emulsions and 1-10 parts of polytetrafluoroethylene perfluoroalkyl vinyl ether (PFA) emulsions. The copper-clad plate prepared from the fluororesin mixture comprises a plurality of superimposed varnished cloths and copper foil coating one or two surfaces of the varnished cloths, and each varnished cloth comprises a glass fiber cloth and the fluororesin mixture attached to the dipped and dried glass fiber cloth. The fluororesin mixture is prepared by using the PTFE emulsions as main resins and can dip the glass fiber cloths many times under the condition that the PTFE sintering temperature is330 DEG C to prepare the vanished cloths, and the vanished cloths prepared from the fluororesin mixture has the advantages of good gum dipping quality, level surface, flexibility and easy operation; and besides, the copper-clad plate made from the fluororesin mixture has excellent dielectricperformance which meets the dielectric performance requirement of the high-frequency communication field for a base plate material, and has simple making method and process and is beneficial to industrial continuous production.

The invention discloses a silica gel gel dipping glove. The silica gel gel dipping glove comprises a glove core and a gel dipping layer, wherein the gel dipping layer is a silica gel mixed gel layer,and the silica gel mixed gel material layer consists of the following components in parts by weight of 70-90% of silica gel, 5-20% of curing agent, 5-20% of a diluent and 0-10% of color paste. According to the silica gel gel dipping glove, the silica gel mixed gel material layer is composed of the silica gel, the curing agent and the diluent, and the silica gel, the curing agent and the diluent are mixed according to the above specific proportion; the gel material is good in flowing property, easy to absorb on the glove core, and firm in bonding between the gel material and the glove core after being cured, the gel surface is thin and soft, and the transparency is high; and a specific amount of the color paste is added according to color requirements, the gel surfaces with different colorscan be manufactured, the stereoscopic impression of the gel surfaces is strong, and the appearance of the glove is attractive.

The invention relates to an impregnation method for a dry capacitance type high-voltage bushing core. The impregnation method comprises steps as follows: distributed through holes are formed in the wall of a conductive tube, one end of the conductive tube is closed, the conductive tube is wound with an insulating layer, then the insulating layer is wound with a capacitive screen, and alternate winding is performed until the specified layer number of the capacitive screens is reached; a prepared bushing core blank body is arranged in an airtight pouring die, glue with pressure is introduced through an open end of the conductive tube, is enabled to permeate layer by layer to an external wrapping layer through the through holes in the conductive tube and is gradually diffused to all insulating layers and capacitive screens, and an impregnation process of the bushing core is finished after heating and curing forming. According to the impregnation method, diffusion and permeation of the glue can be formed from inside to outside, retention of bubbles is avoided, the qualified rate of products can be increased more than 3 times after impregnation, heating and curing, the impregnation quality is also greatly improved, further, the production cost is reduced, and the economic benefit of a production enterprise can be greatly increased.

The invention relates to a polyphenol-modified fluorine-containing resin mixture and a prepreg and a copper-clad laminate prepared therefrom. The present invention modifies the surface of the inorganic filler and the glass fiber cloth with polyphenol, so as to promote the dispersion of the inorganic filler in the fluorine-containing resin matrix, improve the compatibility between the inorganic filler, the glass fiber cloth and the fluorine-containing resin, and further Enhance the interaction between inorganic filler, fluorine-containing resin, glass fiber cloth and copper foil. Further, the high-frequency copper-clad laminate made of the prepreg, film and copper foil has good thermal-mechanical properties, excellent dielectric properties, good overall performance stability, and good uniformity, especially the peel strength of the copper foil is very high, It can meet the comprehensive performance requirements of substrate materials in the high-frequency communication field.

The invention belongs to the field of communication materials, in particular to a polydopamine (PDA) modified hydrocarbon composition-based prepreg and a copper clad plate prepared by using the same.A Hydrocarbon composition with excellent dielectric properties is constructed by using hydroxyl-terminated, amino-terminated or mercapto-terminated modified polyaryl ether or polyolefin resin as matrix resin and epoxy resin as a main curing agent. In the present invention, the prepreg made by impregnating a dispersing solution of the hydrocarbon composition with a reinforcing material and then baking and drying has uniform adhesive content, good impregnation quality, strong resin adhesion, smooth surface, good toughness and appropriate viscosity. Furthermore, the high-frequency copper clad plate made of the prepreg and copper foil has good thermal and mechanical properties, excellent dielectric properties, good comprehensive performance stability, good uniformity and high copper foil peeling strength, which can meet the comprehensive performance requirements of substrate materials in the field of high frequency and high speed communications.

The invention discloses a high-carbon preservative bamboo wallboard production method, which comprises the steps of (1) removing tabasheer from a fresh bamboo and rolling the bamboo to obtain a silky bamboo splint; (2) drying the bamboo splint until the water content is lower than 6-9%; (3) carbonizing the bamboo splint that meets the water content requirement in a carbonization chamber at normal pressure, and selecting qualified and removing the unqualified bamboo splint after carbonization; (4) processing the qualified carbonized bamboo splint by impregnation, and drying the bamboo splint until the water content is between 13-17% after processing; and (5) processing the bamboo splint for health preserving and balancing in a health preserving room; (6) performing hot pressing moulding to obtain a bamboo sheet; (7) processing the bamboo sheet to obtain the bamboo wallboard. The invention also relates to a bamboo wallboard obtained by the above method. The bamboo preservative performance of the bamboo wallboard can be greatly improved by carbonization; the production period is short; the operation is simple; the appearance quality is high; and advantages like safety and environmental protection are provided.

The invention discloses a vacuum impregnation method for a plastic tube of an oil level sensor in a fuel tank, which belongs to the technical field of impregnation methods and includes the following steps: Step S3: testing the degree of vacuum, sealing the impregnation cylinder through a sealing cover, closing the impregnation cylinder and the After the paint inlet valve between the paint storage tanks, respectively open the air intake valve and the vacuum gauge valve at the upper end of the paint immersion cylinder, and then turn on the vacuum pump to evacuate the paint immersion cylinder for 1 to 2 minutes, so that the vacuum degree in the paint immersion cylinder is higher than ‑0.085 MPa, record the required time, close the vacuum gauge valve, open the paint inlet valve to connect the paint dipping cylinder with the paint storage tank to communicate with the outside; Step S4: Part dipping: pour the prepared and aged paint into the paint storage tank , close the paint inlet valve, and remove the sealing cover on the paint dipping cylinder. The invention has low cost, less consumption of insulating varnish, can improve the penetration ability and filling rate of insulating varnish, and can eliminate defects such as pinholes, air bubbles and pits on the base of plastic pipe parts, thereby improving its overall mechanical strength, insulation strength and Moisture-proof, mildew-proof performance.

The invention discloses a high-carbon preservative bamboo floor production method, which comprises the steps of (1) removing tabasheer from a fresh bamboo and rolling the bamboo to obtain a silky bamboo splint; (2) drying the bamboo splint until the water content is lower than 6-9%; (3) carbonizing the bamboo splint that meets the water content requirement in a carbonization chamber at normal pressure, and selecting qualified and removing the unqualified bamboo splint after carbonization; (4) processing the qualified carbonized bamboo splint by impregnation, and drying the bamboo splint until the water content is between 13-17% after processing; and (5) processing the bamboo splint for health preserving and balancing in a health preserving room; (6) performing hot pressing moulding to obtain a bamboo sheet; (7) processing the bamboo sheet to obtain the bamboo floor. The invention also relates to a bamboo floor obtained by the above method. The bamboo preservative performance of the bamboo floor can be greatly improved by carbonization; the production period is short; the operation is simple; the appearance quality is high; and advantages like safety and environmental protection are provided.