TY - JOUR

T1 - Application of organosilane coatings for improvedanti-adhesive properties enabling facilitated demoldingin polymer processing

AU - Bandl, Christine

AU - Krempl, Nina

AU - Berger-Weber, Gerald

AU - Kern, Wolfgang

AU - Friesenbichler, Walter

PY - 2021/3/10

Y1 - 2021/3/10

N2 - Easy and residue-free demolding is an everlasting topic in the plasticsprocessing industry. Typically, facile ejection of the produced parts from themold is provided by separation agents (silicon sprays, surface coatings). In thiswork, a perfluoroalkyl-based organosilane coating is applied to exchangeablesubstrates of an injection mold. Besides the simple application, the coating canalso be restored easily in a procedure based on flame treatment. Coating andrecoating are proven by contact angle measurements with water, while theanti-adhesive effect and the related relief during demolding are evaluatedusing a special measuring device in an instrumented two-plate injection mold.The results reveal that the organosilane layer reduces the demolding forcesand the resulting static friction coefficient by 50%. Furthermore, multiplerecoating significantly improves the durability of the anti-adhesive coating.Based on these findings, the easily applicable and renewable organosilanecoating represents a suitable alternative to conventional release coatings.

AB - Easy and residue-free demolding is an everlasting topic in the plasticsprocessing industry. Typically, facile ejection of the produced parts from themold is provided by separation agents (silicon sprays, surface coatings). In thiswork, a perfluoroalkyl-based organosilane coating is applied to exchangeablesubstrates of an injection mold. Besides the simple application, the coating canalso be restored easily in a procedure based on flame treatment. Coating andrecoating are proven by contact angle measurements with water, while theanti-adhesive effect and the related relief during demolding are evaluatedusing a special measuring device in an instrumented two-plate injection mold.The results reveal that the organosilane layer reduces the demolding forcesand the resulting static friction coefficient by 50%. Furthermore, multiplerecoating significantly improves the durability of the anti-adhesive coating.Based on these findings, the easily applicable and renewable organosilanecoating represents a suitable alternative to conventional release coatings.

UR - http://www.scopus.com/inward/record.url?scp=85102288445&partnerID=8YFLogxK

U2 - DOI: 10.1002/app.50714

DO - DOI: 10.1002/app.50714

M3 - Article

VL - 2021

JO - Journal of Applied Polymer Science

JF - Journal of Applied Polymer Science

SN - 0021-8995

M1 - 50714

ER -