TY - JOUR

T1 - Application of organosilane coatings for improved anti-adhesive properties enabling facilitated demolding in polymer processing

AU - Bandl, Christine

AU - Krempl, Nina

AU - Berger-Weber, Gerald

AU - Kern, Wolfgang

AU - Friesenbichler, Walter

N1 - Publisher Copyright: © 2021 The Authors. Journal of Applied Polymer Science published by Wiley Periodicals LLC.

PY - 2021/3/10

Y1 - 2021/3/10

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

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

KW - applications

KW - coatings

KW - friction

KW - molding

KW - surfaces and interfaces

KW - wear and lubrication

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

U2 - 10.1002/app.50714

DO - 10.1002/app.50714

M3 - Article

AN - SCOPUS:85102288445

VL - 138.2021

JO - Journal of Applied Polymer Science

JF - Journal of Applied Polymer Science

SN - 0021-8995

IS - 30

M1 - 50714

ER -