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...

①BOPP / VMCPP The composite structure is mainly used in the field of light food packaging such as instant noodles, egg yolk pie and snow cake. The composite structure is most suitable for one-component aqueous adhesives. Compared with solvent-based polyurethane adhesive, single component water glue less ink transfer phenomenon, and the initial adhesion is high, without aging, can be directly cut bag process. ② BOPP/CPP This structure is more suitable for the use of two-component water glue, and the bonding strength of single-component water glue can not meet the requirements of use. The structure is also mainly used in bread, cake and other packaging. ③ PET/VMCPP This kind of structure is mainly used in candy, back - sealed rice cake packaging. The single-component water glue is more suitable for this structure, which can effectively control the transfer of aluminum plating and meet the requirements of high-speed packaging. ④ PET(BOPP)/VMPET/PE The water-based adhesive can be used in this structure twice. The outer composite can effectively reduce the transfer of aluminum plating and provide sufficient bonding strength. The inner composite can effectively avoid the influence of friction coefficient on bag making. ⑤PA/PE, PET/PE and BOPP/PE The above three structures are more suitable for the use of two-component aqueous adhesives. Due to the good low temperature resistance of waterborne adhesive. It can make the above three structures in the frozen food packaging (quick-frozen dumplings, ice cream, etc.), effectively reduce the brittle cracking of packaging materials under freezing conditions, and improve the heat sealing strength under low temperature conditions. Adhesive solutions of Sinograce Chemical Aiming at the above application structure of water-based adhesive, Anhui Sinograce Chemical Co., Ltd. has developed the single-component water-based adhesive 160 series and high-performance two-component water-based adhesive 170 series products, which can provide our customers with a variety of bonding solutions. At present, our company's single and double component waterborne adhesive has been introduced to the market, the market feedback is good, the performance is excellent, fully able to meet the customer's composite needs of various packaging structures. Table 1 Product performance of Sinograce Chemical waterborne adhesive