60results about How to "Low surface treatment requirements" patented technology

The invention discloses an embedded stirring and rubbing slit welding method for dissimilar metals, which is especially suitable for large-area lap connection of aluminum or magnesium or harder metal materials. The embedded stirring and rubbing slit welding method comprises the steps of: firstly, processing one or more dovetail grooves on a second harder base material; secondly, assembling according to a lap connection form, and placing an aluminum plate on the upper sides of the dovetail grooves of the second harder base material; using a needle-free stirring head and installing in an inclining manner; starting the stirring head to rotate and enabling the stirring head to be in contact with the upper surface of the aluminum plate, wherein the pressing depth of the stirring head is limited to about between 0.1mm and 2mm and a welding interface needs not to be penetrated; after rubbing and preheating for several seconds at the starting end, moving the rotating stirring head or operating platform so that the aluminum plate is helically extruded in a groove of a lower plate and the welding or cladding is completed. Compared with the resistance slit welding, the method disclosed by the invention has remarkable energy saving advantage. Compared with the traditional stirring rubbing welding, the method disclosed by the invention has the advantages of no keyhole and no abrasion to needles by the harder base material. The method can be used for welding, and can also be used for preparing a bimetal composite plate.

The invention discloses a hot melt adhesive, a preparation method and an application of the hot melt adhesive, and a heat shrinkable sleeve. The hot melt adhesive is prepared from the following main components in percentages by weight: 30 to 80% of asphalt mastic, 15 to 50% of thermoplastic resin, 5 to 40% of thickening resin, 0 to 5% of an antioxidant and 0 to 20% of a filling material. The preparation method for the hot melt adhesive comprises the following steps: weighing of raw materials in a formula proportion, mixing under heating, cooling and molding. The invention alleviates problems like poor binding properties, narrow application range and no resistance to low temperature for a conventional hot melt adhesive. The hot melt adhesive provided by the invention has excellent binding properties and high peel strength to PE, steel and epoxy primer; meanwhile, the preparation method for the hot melt adhesive provided by the invention has the advantages of convenience in operation andcontrol, low energy consumption, low cost, easy implementation of large-scale production, and facilitation of further promotion of industrial development.

The invention belongs to the field of metal powder coatings, and in particular relates to a metal powder coating for enhancing a flash effect. The metal powder coating for enhancing the flash effect comprises an epoxy resin particle system containing epoxy resin, a correspondingly adaptive curing agent A and flash metal pigment, and a fluorocarbon resin particle system containing fluorocarbon resin and an adaptive curing agent B. The weight part ratio of the epoxy resin particle system to the fluorocarbon resin particle system is (6-4):(4-6). According to the metal powder coating for enhancing the flash effect disclosed by the invention, thick aluminium-silver powder is successively bonded into an epoxy resin layer by using a binding process, so that the thick aluminium-silver powder is deposited in the bottom layer of a coating together with the epoxy resin layer in the curing process and cannot float in the surface layer of the coating; and a transparent fluorocarbon resin layer floating to the upper layer plays a role of protecting oxidative resistance of flash metal powder.

The invention discloses a hot-melt adhesive, its preparation method and application, and a heat-shrinkable sleeve. The hot-melt adhesive is mainly made of the following components in weight percent: asphalt mastic: 30-80%; thermoplastic resin: 15-50% %; tackifying resin: 5-40%; antioxidant: 0-5%; filler: 0-20%; wherein, the melt index of the thermoplastic resin is 0.5-23g / 10min. The preparation method of the hot-melt adhesive comprises the steps of taking raw materials in a formula quantity, heating and kneading, cooling, and molding to obtain the hot melt adhesive. The invention alleviates the problems of poor bonding performance, narrow application range, low temperature resistance and the like of existing hot melt adhesives. The hot-melt adhesive of the present invention is prepared from thermoplastic resin with a melt index of 0.5-23g / 10min, asphalt mastic, tackifying resin and other components, and has excellent high and low temperature resistance, sealing performance and anti-corrosion effect. At the same time, the preparation method of the hot melt adhesive of the present invention is easy to operate and control, has low energy consumption, low cost, and is easy for large-scale production.

The invention relates to an anticorrosive viscoelastic body rubber belt, which comprises a protective film layer, a first viscoelastic body rubber belt, an enhanced network layer, a second viscoelastic body rubber layer and a release film layer arranged in turn, wherein the protective film layer is bonded with the first viscoelastic body rubber layer, the first viscoelastic body rubber layer is bonded with the enhanced network layer, and the enhanced network layer is bonded with the second viscoelastic body rubber layer to compound a whole body; and the release film layer is adhered to the second viscoelastic body rubber layer, wherein the viscoelastic body rubber is prepared from the following raw materials in percentage by weight: 3 to 10 percent of butyl rubber, 5 to 10 percent of high molecular weight polyisobutylene, 25 to 35 percent of medium molecular weight polyisobutylene, 10 to 15 percent of low molecular weight polyisobutylene, 30 to 45 percent of inorganic enhanced powder, 0.5 to 1.0 percent of antioxidant, 0.5 to 1.0 percent of anti-aging agent, and 0 to 1.0 percent of colorant. The viscoelastic body rubber belt has a self-healing function, is not brushed with a primer when used, and can be directly used for corrosion protection of irregular components. The invention also relates to a preparation method of the anticorrosive viscoelastic body rubber belt.