Improvement of the adhesive capacity of SBR for footwear outsoles by surface activation and coating deposition with atmospheric pressure plasma

Abstract

Looking for a cleaner alternative to halogenation in the preparation of rubber for bonding with leather in footwear, atmospheric pressure plasma treatments were applied on styrene–butadiene rubber (SBR). Its adhesive capacity was improved and the highest bond strength standards for footwear were met. Two optimal processes were identified: (1) Plasma polymerization of (3‐aminopropyl)triethoxysilane coatings on flat SBR and (2) plasma‐activation of mechanically roughened SBR. The improvement on coated, flat SBR was mainly due to its surface chemistry having greater concentrations of polar carbon–oxygen species than the untreated SBR. For plasma‐activated, mechanically roughened SBR, combined contributions of mechanical roughening and roughening by plasma irradiation were found. Coating flat SBR at 100 mm/s showed the best balance between improved bond strength and durability.

Low‐friction coatings on medical needles through atmospheric‐pressure plasma‐polymerization technology

“…Amine‐rich surfaces are favorable for improving the adhesive properties of the coatings. [ 41–43 ] The highest amount of NH 2 was observed in the TRIAP‐based coating, followed by those of TMSPEA and APTES (Figure 6). These results are in accordance with the adhesion degree that was observed in the SEM images after the puncture test (Figure 5).…”

Hydrophobicity changes of polluted silicone rubber introduced by spatial and dose distribution of plasma jet

“…Surface treatment by plasma has drawn more and more attention due to its advantages in technology, economy, and environment, such as surface etching [1][2][3][4], surface activation [5][6][7][8], etc. The interaction of plasma and surface is affected by both the plasma characteristics and the surface properties.…”