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

First: Teflon coating introduction Industrial Teflon coating is suitable for plastic rubber mold, ball mold, glove mold, latex mold, roller, conveyor belt, mechanical parts and other surface treatment, containing "FEP" and "PTFE" polytetrafluoroethylene ingredients with high-performance resin, divided into the bottom coating and surface coating a total of two layers, has the best anti-corrosion, heat resistance and non-stick, almost inert to all chemicals, It is widely used in the field of non-stick and anti-corrosion. 1.Teflon coating: mainly fluorocarbon polymer as raw material, has a number of advantages: (1)Non-adhesion (2) low friction (3) corrosion resistance (4) high temperature resistance (5) high insulation (6) non-stick wet Application: Mold (rubber mold, shoe mold, ball mold, foam, PU rubber mold, etc.), auto parts, textile roller, electronic parts, machinery, chemical industry, paper making, industrial hanging tools, etc 2.The advantages of the mold: (1)Easy demoulding, avoid the mold sticking glue; (2)No release agent is needed to avoid affecting the paste effect and polluting the environment; (3)Reduce the color mixing phenomenon of multi-color rubber bottom; (4)Greatly reduce the waste rate; (5)Coating life can be as long as 50000-100000 times. Second: Teflon coating spraying process A: The processing of material First, the material (aluminum or stainless steel) with (360 ° C ×30 minutes ~380 ° C ×10 minutes) air burning or solvent cleaning for the first step of degreased, the second step for surface roughness, available corundum sand 100#~120#, pressure 0.4~0.6mpa, sandblasting, roughness :(2.0~3.5)μm B.Spraying of base oil coating Before using the bottom oil, it must be fully rolled evenly or stirred evenly slowly with the stirring blade (can not be used to shear the blade high-speed stirring, otherwise it will destroy the paint structure, so that the paint glue deterioration), the processed material (must be clean, dry, without any grease, pollution, strictly prohibited to touch the sand surface by hand, otherwise it will seriously affect the adhesion, and even lead to peeling) flat, (1.0 ~ 1.5) mm Ф gun pressure transferred to the distance (0.2 ~ 0.3 mpa (20 ~ 30 cm, concentrate spray directly, use (100 ~ 120 ℃) x (5 ~ 8) minutes, table dry film thickness for 10 ~ 15 microns C.surface oil coating spray The same surface oil must be fully rolled or stirred slowly with stirring blades before use, After cooling the workpiece coated with bottom oil to normal temperature, the construction of surface oil can be carried out (the surface should be absolutely clean, not contaminated by any pollution) with (1.0~1.5)mmФ spray gun nozzle, the pressure is adjusted to (0.2~0.3)mpa, the distance is (20~30)cm, the direct stock solution spray, The film was first dried at (120-150) ° C ×(5-8) minutes and then sintered at 380 ° C ×10 minutes. The total film coating after sintering was (20-25)μm. (Inadequate sintering will affect the adhesion, the ...

With the continuous improvement of people's demand for life, glue and adhesive products are also advancing with The Times and constantly upgrading to meet people's needs. The emergence of removable glue greatly satisfies this phenomenon, so what is removable glue? What are the characteristics of removable glue? Removable adhesive is a new type of environmentally friendly synthetic material, the application of a new technology, because of its environmental protection and random tear paste characteristics by the masses like, to a large extent, gradually replaced the ordinary double-sided adhesive. Removable glue is a kind of premolded small glue, ultra-thin glue, elastic glue, can move at will, leaving no traces of single-sided or double-sided glue. It is different from the traditional adhesive supplies, has been designed and made according to your requirements of the glue specifications, size, shape, you just start to paste the two products butt can be. Removable glue features: Name: Removable glue, non-trace glue, washing glue, foam non-trace removable glue, etc. Material: Synthetic rubber. Stickiness: strong stickiness, enough for daily life, like no mark hook, etc. Removable adhesive performance: 1.Can move freely, paste freely, repeat paste; 2.Do not leave any traces, repeated paste and separation will not leave any traces on the surface and objects. 3.Can be washed with water, paste surface has dust or other dirt, can be washed with clean water, after drying to maintain the original viscous effect. 4.Office stationery gift industry: removable signage, removable puzzle, removable adhesive paper, removable foam tape, removable double-sided tape, stationery assembly, toys, gifts, arts and crafts, billboard bonding, signage paste, announcement removable paste; 5.Daily necessities industry: no mark hook, removable refrigerator paste, bathroom products bracket fixed, removable toilet mat, wedding car decoration, adhesive mirror, photo wall decoration, wall decoration painting; 6.Space vehicle and ship industry: automotive advertising stickers, automotive decoration stickers, automotive side trim, stainless steel tank cover, pedal, brake lights, signs, bumper anti-collision board, sealing strip, auto parts fixed; 7.Construction field: removable wood floor, removable floor tiles, removable wall decoration, doors and Windows, glass, wall, aluminum curtain wall, elevator wall board installation and fixation, safety glass bonding, elevator advertising without trace paste; 8.Craft jewelry industry: glass surface decoration paste, glass explosion-proof paste, jewelry fixed paste; 9.Hardware machinery industry: drawing paste, tool paste, industrial logo, sign paste, PC, PP and ABS and other materials of the letter, pattern bonding fixed, fixed nameplate. In addition to the range listed above, it can also be used in different materials, and is the first choice for many electronics and packaging industries. Sinograce Chemical Co., Ltd. has advanced testing a...