The primer sprayed on the plastic surface can promote the effective adhesion between the glue and the material, increase the adhesion between the adhesive and the plastic, and solve the problem of degumming, and the main role of the primer is to solve the problem of degumming in the adhesive process. One: The definition of primer? The base coating agent is a base coating treatment agent that assists the adhesive and the substrate to form a good bonding layer in the field of industrial bonding, and acts between the base material and the adhesive by spraying or brushing and other construction methods. Common in practical industrial applications are: improving the base coating of PP plastic automotive interior parts and polyurethane glue, improving the base coating of nylon plastic and hot melt adhesive and other types of materials and different adhesives between the base coating. Two: the application effect of primer The base coating agent has good compatibility with the adhesive and the substrate, has good stability to heat and light, and enhances the adhesion between the adhesive and the substrate. Through wetting and intermolecular force, the free energy of the substrate surface is adjusted to improve the physical properties of the substrate and the bonding strength of the adhesive as an intermediate layer. The base coating agent optimally combines the difficult base material with the adhesive, and plays the role of laying foundation and linking for the formation of a firm adhesive layer. Three: application process of primer 1.First clean the surface of the plastic substrate, and then evenly coat the surface of the substrate by spraying or brushing. 2.The film thickness of the general primer is 3-5μm, and it is naturally dry. If there are baking conditions, it can be baked at 60-70 ° C for 3-5 minutes (baking helps to improve the effect of the primer). 3.Apply adhesive again. After the adhesive is baked and dried, place it in the air for 2 hours to test the adhesion Four: The use of primer precautions? 1.The use of primer requires a preliminary sample to determine whether it plays a role in enhancing bonding, and the general detection methods include 100 cells and stripping, pulling and other tests 2.Second, when coating the substrate, the entire surface of the substrate needs to be covered completely and evenly, and the cleaning process of the substrate needs to be carried out before construction. 3. Due to the different molecular structure and properties of the substrate, different substrates need to be used relative to the substrate. The application of primer in plastics can effectively solve the problem that many plastic surfaces are not attached to adhesives, and greatly improve the application effect of plastics. Sinograce Chemical production film and adhesive directly connected acrylic top and bottom coating, welcome to consult.

1.Water as a dispersion medium, do not use organic solvents, non-toxic or flammable danger, is environmentally friendly products; 2.Acrylic monomers have many types, containing ester groups, carboxyl groups, hydroxyl groups and other functional groups have strong polarity, it is easy to emulsion copolymerization with other monomers such as vinyl acetate, styrene, vinyl chloride, etc., to make emulsion adhesives with various properties; 3.Acrylic polymer has excellent color retention, light resistance and weather resistance, not easy to oxidize, not sensitive to ultraviolet degradation; 4.Acrylic polymer bonding strength and shear strength are very high. Acrylic emulsion adhesives can be classified in two ways. Emulsion according to the use of the product classification can be divided into: inner wall emulsion, outer wall emulsion, elastic emulsion, waterproof emulsion, sealing emulsion and so on. According to the composition of the product can be divided into: pure acrylic emulsion, silicone acrylic emulsion, styrene acrylic emulsion, vinegar acrylic emulsion and so on. However, acrylic emulsion adhesives also have certain disadvantages: poor water resistance, long drying time, and easy to mold.

PET protective film material is transparent colorless, the surface after hardening treatment, the general PET protective film material according to the origin of different, the surface hardening value between 3H-4H, the better the surface hardening, the stronger the wear resistance. Light transmittance is also the main property of PET protective film materials, the general light transmittance is more than 90%, the higher light transmittance not only makes us have a good visual effect when using related instruments, but also has a good protective effect on the eyes. We all know that the use rate of PET protective film in the electronics industry is very high, and the thickness of the tape used in different ranges is also different, and the thickness of PET protective film on the market now ranges from 30μm to 245μm. Now analyze for you, what kind of performance of different thickness PET protective films, and what fields are they mainly used in? 1, 30μm PET protective film Although thin, it has good shear resistance and excellent bonding strength, anti-aging performance and UV resistance are very good, the probability of fog is very low, and it is generally used for LCD and fixed nameplates. 2, 50μm-60μm PET protective film It is a thin and light variety, but it also maintains a good bonding effect, mainly used for the sticker of the nameplate, the attachment of the headset microphone, the fixing of the digital camera reflective film, the fixing between the LCD reflective film and the backlight film group and the mobile phone center button outer frame. 3, 80μm PET protective film Good bonding ability at room temperature, suitable for polar surface smooth surface paste, LCD frame fixing, digital camera buttons and hard materials, LCD front shell and panel fixing 4, 100μm PET protective film It has good adhesion strength for smooth surface, mainly used for fixing between LCD backlight film group and bottom frame. 5, 125μm PET protective film The comprehensive performance is good, has good adhesion performance for most materials, and has excellent shear resistance and temperature resistance. It is mainly used for the fixing of Windows and lenses, the fixing of LCD module in digital camera, and the fixing between LCD backlight film group and bottom frame. 6, 150μm PET protective film Can maintain good adhesion at high and low temperatures, suitable for EPDM sealing strip, good CaCO3(calcium carbonate) resistance. 7.160μm PET protective film Not only has excellent shear strength, temperature resistance and paste ability, but also can ensure reliable paste effect in harsh external environment. Mainly used for mobile phone window, lens, battery fixing, digital camera rubber card, panel fixing. 8, 200μm PET protective film Strong temperature resistance, mainly used for Windows, lenses, battery fixing, digital camera rubber sheet, memory card, panel fixing. 9, 240μm PET protective film Thicker material, high hardness, generally used in large industrial pro...

Pressure sensitive adhesive (PSA) is a self-adhesive material, only need to apply a small pressure, can form a van der Waals force on the surface of the two objects, and the adhesive is firmly bonded, this pressure sensitive bonding performance is its basic feature, is also different from other adhesives typical characteristics. PSA can be divided into solution type, emulsion type, photocuring type and hot melt type.Solution PSA contains flammable and toxic organic solvents, which is easy to cause environmental pollution. Emulsion PSA dries slowly and the coating process is complicated. Performance advantages of hot melt pressure sensitive adhesive Hot melt pressure sensitive adhesive (HMPSA) has become a popular adhesive product due to its advantages of no solvent, environmental protection, simple preparation, low cost, etc., involving in all aspects of daily life, including daily chemical, medical, automotive, home, label, packaging, wood processing and shoe making. Common hot melt pressure sensitive adhesive classification Thermoplastic elastomer HMPSA Thermoplastic elastomer HMPSA is a mixture of thermoplastic elastomer, adhesive resin, plasticizer, antioxidant and filler. Thermoplastic elastomers mainly refer to styrene and its block copolymers, commonly used such as styrene-butadiene block (SBS) and styrene-isoprene block (SIS), which have a wide range of sources, reasonable prices, thermoplasticity at high temperature, and the elasticity of rubber at room temperature. Compared with other hot-melt pressure-sensitive adhesives, thermoplastic elastomer hot-melt pressure-sensitive adhesives have the advantages of good cohesion, small melt viscosity, strong adhesion and mature process development. However, due to the low polarity of SBS and SIS molecules and the existence of unsaturated double bonds, the traditional thermoplastic elastomer HMPSA has some shortcomings, such as low bonding strength to polar materials, poor oil and solvent resistance and insufficient heat resistance to oxygen aging. In order to better meet the performance requirements of users on SIS based hot melt pressure-sensitive adhesive, researchers have modified it by various ways, including SIS thermoplastic elastomer modification, tackifying resin modification, physical blending modification. Acrylates HMPSA The monomers of acrylate HMPSA mainly include flexible monomer, hard monomer and functional monomer. The flexible monomer has viscosity and the glass transition temperature (Tg) is low. The hard monomer has high Tg, provides adhesive viscosity and cohesion, and significantly improves water resistance and transparency; Functional monomers contain double bonds and cross-link with other monomers to promote polymerization, speed up reaction rate and improve stability. Compared with other HMPsas, acrylic HMPSA has excellent weather and heat resistance without the use of viscosity enhancing resins and antioxidants. Silicone HMPSA Silicone HMPSA has a broad application prosp...