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Glass fiber mesh in the process of use:The lap width between the mesh is not less than 50mm, the negative corner mesh to pressure stubble lap, its width is larger than 50mm, yang angle is greater than or equal to 200mm. In the construction, mesh paving should be smooth, no wrinkles, mortar plumpness reached 100%, at the same time to find and maintain smooth, straight corner square and the verticality of yin and yang.s
Domestic glass fiber: it is made up of two layers of non-woven fabric and three layers of glass fiber. The layer is not clear and the filter layer is thick. It is not easy to break the water in the oil. The precision is generally 1 - 100 micronss
High thermal conductivity CEM-3 material with high cost performance, and now only genuine, aluminum substrate counterfeit goods more, if from genuine, aluminum substrate has higher heat dissipation performance, but the price is high.s
Installing waterproof layer under hot mix asphalt pavement is one of the best methods to protect and prolong the life of road. The anti cracking fabric of general material is deformed and damaged at high temperature. Polyester glass fiber cloth is made of non-woven glass fiber / polyester. It can withstand the high temperature construction of modified asphalt concrete. This high temperature stability of polyester glass fiber cloth will provide a continuous, non deformation waterproof layer, effectively prevent moisture infiltration, and avoid moisture infiltration caused by pavement and base damage.s
We can't transmit electrical signals just as insulation plates, so we need to cover the surface with copper. So we call the PCB board a copper clad substrate. In the factory, the common copper substrate in this code is FR-4, each card manufacturers which in general there is no difference, so we can think of everyone at the same starting line, of course, if it is best to use high frequency board, copper clad PTFE glass cloth laminate high cost. The process of copper is very simple, generally can be made by rolling and electrolytic solution, the so-called rolling is Gao Chundu (>99.98%) of the copper rolling method on the PCB substrate, because the adhesive has excellent epoxy resin and copper foil, copper foil adhesive strength and high working temperature, can be no bubble dip in the molten tin is 260 DEG C in. This process is like rolling dumpling wrappers, but the dumpling wrappers are thin and thin. The thinnest is less than 1mil (industrial unit: mil, 1/1000 inches, equivalent to 0.0254mm)! If the dumpling wrappers are so thin, the pot must leak! The so-called electrolytic copper in junior high school chemistry has learned, CuSo4 electrolyte can continuously manufacture a layer of "copper foil", this is more easy to control the thickness, the longer the copper foil the more thick! Usually the factory has strict requirements on the thickness of copper foil, usually between 0.3mil and 3mil, and has a dedicated copper foil thickness tester to test its quality. Like old radios and amateur PCB, copper is especially heavy, and the quality of the factory is far worse than the computer board.s
The advantages of this material has good coverage function, suitable for all kinds of surface defects, the effective coverage of new and old walls, ensure that the surface structure and color uniformity. The tensile strength, preventing wall cracking, strengthening effect on the wall with high quality coatings, surface static electricity accumulation, not easy to fouling dead, and clean.s