36results about How to "No stripping" patented technology

The invention discloses a non-yellowing capacitor coating at a high temperature having deep drawing resistance performance and a preparation method thereof. The capacitor coating in the invention is prepared from the materials according to the following parts by weight: 20 to 50 parts of hyperbranched polyester resin, 1 to 7 parts of saturated polyester resin, 3 to 12 parts of isocyanate, 0 to 0.5 parts of adhesion promoter, 0 to 0.15 parts of slipping wax, 0 to 0.3 parts of organic tin catalyst, 2.0 to 6.0 parts of resin modifier, 0.07 to 1.0 parts of defoamer, 0.15 to 0.20 parts of flatting agent, and 30 to 62 parts of solvents. The hyperbranched polyester resin, saturated polyester resin and isocyanate are put into a container so as to prepare a mixture after high-speed dispersing; the rest of the materials are then put into the mixture so as to mix homogeneously by medium-speed dispersing, thereby obtaining the non-yellowing capacitor coating at a high temperature having deep drawing resistance performance. The capacitor in the invention has the characteristics of deep drawing resistance, good percentage elongation of coating film and no yellowing at a high temperature.

The invention discloses an insulation stretch resistant coating, a preparation method and an application thereof. The coating comprises the following components of 15-35 parts of a polyester resin A, 5-25 parts of a polyester resin B, 3.5-5 parts of an amino resin, 0-0.5 part of an adhesion promoter, 0.1-0.2 part of a slip additive, 2.5-4 parts of a surface modification agent, 0.1-0.2 part of an antifoaming agent, 0.1-0.2 part of a flatting agent and 50-55 parts of an organic solvent. The method firstly mixing the polyester resin A, the polyester resin B, the amino resin and the organic solvent, and then adding and evenly mixing the adhesion promoter, the surface modification agent, the slip additive, a catalyst, the antifoaming agent and the flatting agent to obtain the insulation stretch resistant coating. The insulation stretch resistant coating is free from yellowing after the coating is roasted for 3 minutes at the temperature of 270 DEG C and capable of resisting high voltage of 1050V; the appearance of a capacitor paint film which is formed by deep-draw is flawless; the paint film is free from dissolution after-tack when soaked in carbon tetrachloride for 2 hours; and the paint film at the position of a notch of the capacitor is free from peeling off and foaming when the capacitor is cooked at the temperature of 100 DEG C for 30 minutes. Accordingly, the coating is wide in application prospect in electronic products.

The invention provides an environmental-friendly protection film for an automobile. The environmental-friendly protection film is produced by co-extruding and casting an external layer, a middle layer and a bonding layer according to a certain thickness proportion to obtain a white protection film with the thickness of 40 to 100 micron. The environmental-friendly protection film mainly has the functions of dust prevention, mechanical damage prevention, ultraviolet prevention, bird dung pollution prevention, scraping prevention, oil pollution prevention, acid and alkali corrosion resistance, solvent corrosion resistance and the like.

The invention discloses a preparation apparatus and preparation method of a polyimide thick membrane or a polyimide ultrathick membrane, which belongs to the technical field of polyimide membranes. The preparation apparatus comprises a shell, wherein a metal plate parallel to the bottom surface of the shell is arranged inside the shell, the interior of the shell is divided by the metal plate intotwo independent heating cavities and a cooling cavity located on the upper portion of the heating cavity, the top of the heating cavity is provided with a heating pipe parallel to the metal plate, twoside surfaces of the cooling cavity are respectively provided with an air inlet and an air outlet, the outer side of the shell is provided with an air blower, the air blower is communicated with thecooling cavity by virtue of the air inlet, and a thermocouple is arranged in the middle of the metal plate. The invention also discloses a method for preparing the polyimide thick membrane or the polyimide ultrathick membrane by using the preparation apparatus. By adopting the preparation apparatus and preparation method, the polyimide thick membrane or polyimide ultrathick membrane with thicknessgreater than 50 micrometers can be prepared; and moreover, the structure is simple, and the operation is easy.

The invention discloses an exposed polyurea waterproof repair coating, and preparation and construction method thereof. The exposed polyurea waterproof repair coating is prepared from a component A and a component B. The component A is prepared from the following components: polyaspartic ester resin, polyether polyamine, a dispersant, a plasticizer, a defoamer, a coupling agent, solid filler, a thixotropic agent and a leveling agent; the component B is a curing agent; and the mass ratio of the component A to the component B is (1.5-3):1. The invention further discloses the preparation method of the waterproof repair coating and the construction method of the waterproof repair coating at the same time. The exposed polyurea waterproof repair coating has excellent weather resistance and waterproof sealing performance, no hazardous substances volatilization, no yellowing, no peeling and firm bonding. When the coating is used for construction, a base surface does not need to be beaten and chiseled, the coating can be sprayed or scraped manually, is fast and efficient, waterproof thoroughly and durable, environmentally safe, and can be used in new waterproofing projects and building repair projects.

The invention provides a steel-backing non-electroplating copper alloy based friction material and a preparation method and application for a friction piece. The copper alloy based friction material is composed of, by weight, 50%-84% of copper powder, 3%-15% of metallic bond, 5%-20% of friction modifier and 5%-15% of abrasion-resistant agent. The invention further provides the method for preparing the steel-backing non-electroplating copper alloy based friction piece through the friction material and the application of the friction piece. The manufacturing cost of the prepared steel-backing non-electroplating copper alloy based friction piece is far lower than that of a steel-backing electroplating copper alloy based friction piece. The copper alloy based friction layer is firmly bonded to steel backing and free of cracks, stripping and layering are avoided, and the technical requirements and the market requirements are completely met, so that not only is the environment protected, but also resources are saved.

The invention provides a laminated type X-ray filter grating with shape keeping property, rigidity, and durability. The laminated type X-ray filter grating is characterized in that printed sheets (1) formed on sheets (2) with X-ray transmissivity and containing printing layers (3) of specified patterns of X-ray absorption coating layers (4) and gap layers (5) is regarded as the unit layer, a plurality of printed sheets (1) are formed by a printed sheet laminating body (13) laminated by the sheets (2) and the printing layers (3) in an alternative manner in the lamination direction, a plurality of X-ray absorption coating layers (4) laminated in the vertical manner and clamping the sheets (2) form an X-ray absorption portion (10), and a plurality of gap layers (5) laminated in the vertical direction and clamping the sheets (2) form an X-ray transmission portion (12). Therefore, the top can be provided with an upper side plate (20) with the X-ray transmissivity, and the bottom can be provided with a lower side plate (18) with the X-ray transmissivity.

The invention provides a steel-backing non-electroplating iron alloy based friction material and a preparation method and application for a friction piece. The iron alloy based friction material is composed of, by weight, 60%-84% of iron powder, 1%-10% of metallic bond, 12%-30% of friction modifier and 3%-16% of abrasion-resistant agent. The invention further provides the method for preparing the steel-backing non-electroplating iron alloy based friction piece through the friction material and the application of the prepared friction piece. The manufacturing cost of the prepared steel-backing non-electroplating iron alloy based friction piece is far lower than that of a steel-backing electroplating iron alloy based friction piece. The iron alloy based friction layer is firmly bonded to steel backing and free of cracks, stripping and layering are avoided, and the technical requirements and the market requirements are completely met, so that not only is the environment protected, but also resources are saved.

The invention discloses a preparation method for skin adhering type nano-silver ion anti-microbial dressing. The method comprises the following steps: mixing the pure solvent chloroform and ethyl alcohol at volume ratio of (1-3):1, and by taking the mixture as a solvent, dissolving the polylactic acid and polyethylene glycol at volume ratio of (1-4):1 in the mass concentration of 8%-20%; adding the acquired mixed solution into an electrostatic spinning device for preparing the dressing; sterilizing the acquired dressing by utilizing a sterilizing method, taking out and airing; andsoaking the aired dressing into a silver nitrate solution, taking out and then airing, thereby acquiring the skin adhering type nano-silver ion anti-microbial dressing. The invention has the advantages that the use is comfortable, no pressure-sensitive adhesive is required for fixing, the problems of poor air permeability, poor adhesion, low fitting degree, adhesion to wound and incapability of isolating from and resisting against bacteria of the traditional medical dressing can be solved, the skin motion and sweat are not influenced in the use process and the dressing is thin and soft, reusable and free from residue on the skin.

The invention discloses a normal-temperature phosphating fluid for drawing steel. The liquid is prepared by nitrate, nitrite, nitroguanidine, molybdate, phosphate, an accelerant and deionized water. The liquid can be used for performing normal-temperature phosphating on the steel for drawing, and can reach a same effect under a relatively-high-temperature phosphating; under the normal temperature, after 3 to 5 minutes, a layer of black, even and compact phosphating film can be formed on the surface of the steel, and the corrosion resistance is tested to be above the national standard. The problems of large high-temperature phosphating liquid consumption, high possibility in stripping, long phosphating time and the like are solved.

The invention discloses a repairing method for an unfilled corner and a broken corner of a shield segment. The repairing method comprises the following steps of S1, chiseling off uncompacted concreteand protruding aggregate particles at the broken corner; S2, thoroughly cleaning the broken corner on the shield segment, performing flushing with clear water, and waiting for dry state of the damagedsurface; S3, performing mortar mixing: preparing mortar, taking a proper quantity of materials according to the size of the broken corner, performing mixing according to general technical requirements, and uniformly stirring the mortar; S4, performing leveling and trimming after layer-by-layer filling is conducted, and after the mortar to be repaired is dried and hardened, grinding the surface tobe flat through a grinding machine; and S5, performing cleaning and wetting on the repaired part through a steel wire brush, and then performing plastering finishing on the repaired part through cement paste. The repairing method for an unfilled corner and a broken corner of a shield segment effectively overcomes the defects that through a conventional repairing method, repairing strength cannotmeet the requirement, the repaired part is easy to fall off, and chromatic aberration is serious, it is ensured that the overall performance of the repaired shield segment is more complete and attractive, the waterproof and anti-seepage performance of a tunnel is further enhanced, and the overall quality of the tunnel is ensured.

A process for coloring on the surface of steel band features that the steel band is treated in a heating furnace containing protecting gas at 280-560 deg.C for 2-10 min. Controlling the temp, the flow of protecting gas and time, the yellow, blue, or black color can be obtained.