Through the incorporation of suitable hydrocarbon resins, plasticizers, and additives, SIS can be customized to produce a wide array of hot-melt adhesives used in the manufacturing of baby diapers, adult incontinence products, feminine care items, and other non-woven articles. Its elastic attachment adhesives prove particularly effective in bonding elastic components to polyolefin and non-woven films, essential for creating stretchable waist and leg bands in hygiene products.
SIS polymers boast remarkable thermal stability, high cohesion strength, spray ability, and superior adhesion, enhancing the performance of various products across industries.
Styrene-Butadiene (SBS) and Styrene-Isoprene (SIS) block copolymers are considered thermoplastic elastomers, blending the elasticity and resilience of butadiene or isoprene rubber with the moldability of polystyrene under heat.
The production process involves polymerizing styrene and either butadiene or isoprene under the influence of anionic initiators, leading to the formation of diblock and triblock copolymers. In the final product, clusters of hard, thermoplastic polystyrene are dispersed within a network of rubbery polybutadiene or polyisoprene.
Although SBS and SIS exhibit lower resilience compared to vulcanized rubber, their ease of processing and reprocessing, coupled with notable strength at room temperature, render them indispensable in various applications. They are commonly used in injection-molded parts, hot-melt adhesives (especially in footwear manufacturing), and as additives to enhance bitumen properties.
In conclusion, the Styrene-Isoprene-Styrene copolymer, alongside its counterparts in the thermoplastic elastomer family, exemplifies the fusion of elasticity, resilience, and processability, contributing significantly to modern manufacturing processes across diverse sectors.
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