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How to manufacture Pressure-sensitive adhesives

Update:Manufacture Pressure-sensitive adhesives are manufactured with either a liquid carrier or in 100% solid form. Articles ...
Summary:Mar 24,2021
Manufacture
Pressure-sensitive adhesives are manufactured with either a liquid carrier or in 100% solid form. Articles such as tapes and labels are made from liquid PSAs by coating the adhesive on a support and evaporating the organic solvent or water carrier, usually in a hot air dryer. The dry adhesive may be further heated to initiate a cross-linking reaction and increase molecular weight. 100% solid PSAs may be low viscosity polymers that are coated and then reacted with radiation to increase molecular weight and form the adhesive (radiation cured PSA); or they may be high-viscosity materials that are heated to reduce viscosity enough to allow coating, and then cooled to their final form (hot melt PSA, HMPSA).
Styrene block copolymers (SBC), also called styrene copolymer adhesives and rubber-based adhesives, have good low-temperature flexibility, high elongation, and high heat resistance. They are frequently used in hot melt adhesive applications, where the composition retains tack even when solidified; however non-pressure-sensitive formulations are also used. High heat resistance, good low-temperature flexibility.Lower strength than polyesters.
They usually have A-B-A structure, with an elastic rubber segment between two rigid plastic endblocks. High-strength film formers as standalone, increase cohesion and viscosity as an additive. Water-resistant, soluble in some organic solvents; cross-linking improves solvent resistance. Resins associating with endblocks (cumarone-indene, α-methyl styrene, vinyl toluene, aromatic hydrocarbons, etc.) improve adhesion and alter viscosity. Resins associating to the midblocks (aliphatic olefins, rosin esters, polyterpenes, terpene phenolics) improve adhesion, processing and pressure-sensitive properties. Addition of plasticizers reduces cost, improves pressure-sensitive tack, decrease melt viscosity, decrease hardness, and improve low-temperature flexibility. The A-B-A structure promotes a phase separation of the polymer, binding together the endblocks, with the central elastic parts acting as cross-links; SBCs do not require additional cross-linking,styrene-butadiene-styrene (SBS), used in high-strength PSA applications styrene-ethylene/butylene-styrene (SEBS), used in low self-adhering non-woven applications, styrene-ethylene/propylene (SEP), styrene-isoprene-styrene (SIS), used in low-viscosity high-tack PSA applications, vinyl ethers.

RUICO is a company specializing in PSAs , and has cooperation with mining companies in many countries. If you have any needs in this regard, please contact us.

Jimmy yuan

Zhejiang Ruico Advanced Materials Co., Ltd. (Stock No.873233)

Add: No.188, Liangshan Road, Linghu Town, Nanxun District, Huzhou City, Zhejiang Province, China 313018

Phone: +86 (572) 2903236

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Zhejiang Ruico Advanced Materials Co., Ltd.
Ruico Advanced Materials is a famous china flame retardants suppliers and acrylic resins manufacturers, ruico has successively obtained “high-tech enterprises”, “provincial enterprise r&d centers”, “provincial innovative demonstration small and medium-sized enterprises”, “south taihu elite plan leading innovative enterprises”.
● Strong research and development capabilities and comprehensive product line
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● Professional testing laboratory platform
● The product meets various domestic and international professional testing standards and environmental protection requirements.
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