Coating/laminating Methods

Coating/laminating  Methods

Coating: Polymer or elastomer, usually in viscous form, is applied directly to the fabric and cured. A variety of techniques are used. A bond coat (adhesive) may or may not be used.

Laminating: A pre-made or extruded film is bonded onto the substrate, generally with thermal or adhesive bonding. Curing is generally not required.

Coating and laminating can involve virtually every textile form:

• Fibers
• Yarns
• Fabrics (woven, knit or nonwoven)
• And many polymers/elastomers: Rubber of all types (natural and synthetic), acrylic, vinyl, urethane, silicone, PTFE.

Many techniques are used:

• Yarn coating
• Spread coating – many variants
• Dipping/Impregnating
• Calendaring
• Extrusion coating/laminating
• Film-to-substrate bonding
• Combinations

Method of lamination

·         1.      Sewing or stitching

·         2.      Bonding with an adhesive

·         3.      Welding with high-frequency electric current

·         4.      Slightly melting one layer

·         5.      Laminated with foam

Techniques of lamination

·         (a)    Roller (heated)

·         (b)   Spray

·         (c)    Film

·         (d)   Flame

·         (e)    Hot pressing

·         (f)    Curing of the adhesive