Hsinchu, Taiwan, January 14, 2021 – Experienced silicone product maker, General Silicones (GS), announces a solution for using hot-melt adhesives (HMA) with silicone rubber sheets during factory mass production. Over the past decades, the use of hot melt adhesives grew in importance for product assembly. A growing number of industries are relying on HMA. Industry forecasts project continuous growth of HMA use for the coming years.
Achieving “adhesion for silicone rubber” with HMA is difficult due to silicone’s low surface energy. Allowing HMA to act as an interlayer adhesive, the Compo-SiL® silicone rubber offers a deciding innovation for the HMA industry. HMA users can now take advantage not only two bind two dissimilar and lower surface energy material (silicone) but also getting various benefits that silicone rubber provides.
GS produces silicone rubber sheets with a thin modified Polyurethane (PU) layer bonded to the silicone rubber. The ultra-thin PU layer allows the HMA interlayer adhesive to adhere/bond to the Compo-SiL® silicone rubber sheet if given proper process parameters. Heat and Pressure in adequate amounts is necessary for strong adhesion and bonding. With the application of heat the HMA melts and adheres to the surfaces properly when it is compressed. Solidification of the HMA interlayer adhesive depends on the amount of heat provided, thus it should be adequate so as to incur proper and faster solidification. Internal tests by GS with various HMA showed exceptional adhesion. Excellent HMA bonding strength with Compo-SiL® was demonstrated by reaching either cohesive failure within the silicone layer of Compo-SiL® .
General Silicones’ Compo-SiL® combined with HMA provides the most uncomplicated R2R process with CURED silicone bonding to textile. Traditional printing silicone inks limit design freedom to clients. The adhesion of the silicone prints to fabrics using liquid adhesives is challenging and involves several process steps. But Compo-SiL simplifies silicone bonding to textile material and speeds-up production with HMA as an interlayer adhesive.
Suitable applications include:
Many prototypes (applications towards textile accessories, functional textiles, RFID and heater circuits on textile, stretchable substrates etc.) have already been developed by GS to prove the readiness of this technology for the textile industry.
Examples of Prototypes Developed by GS:
Features of silicone offer significant benefits useful in various situations. Silicone provides encapsulation. When used as an outer surface, it protects products from mechanical and chemical damage, extending durability. The application of this technology is not limited to the textile industries but it can be utilized in multidisciplinary fields. The interior trim and automotive textile, consumer 3D logo printing, robotics automation safety and flexible electronics industries are a few examples of trades that can benefit from these characteristics. Additional useful silicone properties are UV stability, usability in high and low temperature, and electric discharge safety.
As HMA bonding is solvent-free and creates an elastic interlayer, it complements well the properties and benefits that silicone provides.
HMA are solvent-free and low VOC emission adhesives. They match with medical-grade silicone and act to avoid and minimize plastic for green products.
Textile electronics based companies can use the printable silicone film. With the printable silicone film, flexible/stretchable circuits are could be realized by inkjet printing or screen printing and bonded to textiles with HMA. Alternative suggested applications are flexible heaters for winter apparel or flexible RFID circuits. Apparel brands create green prints and deco strips using Compo-SiL® silicone with existing roll-to-roll printing processes.
For more information on how to combine HMA processes with Compo-SiL® silicone rubber, contact the GS sales team.
Compo-SiL® : Part of your life!
About General Silicones
General Silicones (GS) was founded in 1970 in Taipei, Taiwan, and is now represented worldwide – including Europe, China, Japan, and South-East Asian countries. GS is a major distributor of silicone materials and an active silicone products manufacturer with ISO 9001, IATF 16949, and ISO 14001 certifications. The company has manufacturing plants in Hsinchu, Taiwan; Wujiang, China; and Bac Giang, Vietnam. With decades of experience in this field, GS has the ability and capacity to provide a wide range of silicone products for many industries, including medical, automobile, consumer products, electronics, and IT. GS listed on Taiwan’s Emerging Stock Market in 2011 (TPEx: 4730). For more information about GS, please visit www.generalsilicones.com