A novel approach in leather finishing: Surface modification with flock fibers

Abstract

In recent years, finishing has begun introducing an extraordinary touch and appearance to the surface of leathers by surface modification. Because some superficial anomalies cannot be recovered by conventional finishing procedures, those can only be drawn on by coating techniques. Coating aims at obtaining an alluring product, which must both recover the surface anomalies and be compatible with the leather characteristics. This study is for valorization of leathers with inferior quality, which contain surface defects, thereby being aimed at improvement of the surface characteristics. The product should have ease of use, as well as giving a fashionable look and touch to flocked fibrous surfaces, whether applied to synthetic leather types or Alcantara. For covered and patterned fibrous surfaces, the experimentations of different flock formulations with different binder types were executed, superficial characteristics were imaged with optoanalytical techniques and the fiber adhesion onto the surface was examined by abrasion tests. The research results showed that polyurethane binder had acceptable qualities for bags, footwear, garments and accessories and yielded superior binding characteristics compared to acrylic binder.

Pengaruh perbedaan jumlah penambahan binder uretan dan berbagai motif embossing terhadap kualitas kulit reject

“…Tipe alifatik banyak digunakan secara luas karena mempunyai ukuran partikel yang kecil, mempunyai daya menutup yang luar biasa, dan memiliki sifat fisika dan mekanik yang baik (Wakaso, 2014). Binder uretan sebagai perekat memiliki kualitas yang baik dalam pembuatan kulit untuk tas, sepatu, pakaian dan aksesoris, dan menghasilkan karakteristik lebih dibandingkan dengan binder akrilik (Basaran et al, 2012). Karakteristik lain dari binder uretan adalah memiliki sifat mekanik, kelemasan dan water vapour permeability (WVP) yang baik (Jankauskaite et al, 2014).…”

Review: unraveling the less explored flocking technology for tissue engineering scaffolds

“…85 This study was performed as leather is such a valuable product which cannot be scrapped or cut out due to its surface defects. Despite conventional finishing recovers the defects …”

“…It has been known for a long time that ocking can be utilized on all kinds of items for creating special surface design. [73][74][75] Flocking was rst demonstrated by French researchers to develop ocked wallpapers almost two centuries ago, and it has gained attention by leaps and bounds during the last two decades following the inclusion of electrostatics in ocking, resulting in so-called electrostatic ocking. 76,77 Electrostatic ocking is a technology that is implemented to apply short length bres on a substrate covered with adhesive in an applied electrical eld; thus the bres were placed vertical to the substrate.…”

“…69-71 In conjunction to scaffold production, Ramakrishna has reviewed the various textile technologies which may be used for scaffold production. 72 Amongst all the available textile technologies, the scaffold fabricated by flocking confers exceptional properties, yet it still remains in an infant stage owing to the lack exploration in the novel flocking technology for tissue engineering applications.It has been known for a long time that flocking can be utilized on all kinds of items for creating special surface design [73][74][75]. Flocking was first demonstrated by French researchers to develop flocked wallpapers almost two centuries ago, and it has gained attention by leap and bounds during the last two decades following the inclusion of electrostatics in flocking, resulting in so-called electrostatic flocking 76,77.…”

Preparation and Properties of Split Microfiber Synthetic Leather

“…Moreover, WPU possesses some advantages, such as good film reforming properties, ease of processing, abrasion resistance, and non-toxicity [14,15], and has been widely used as a coating for leather [16]. However, because WPU coating can't achieve a highly microporous structure by wet processing, the water vapor permeability and tensile strength of WPU coated synthetic leather are always worse than those of leather coated with solvent based PU [17][18][19][20]. Mechanical foaming technology of WPU is a new method of regulating coating structure, and is attracting more and more attention.…”