“Rexine” (artificial leather for table covers, seat covers, footwear) is made by coating thick cloth with which molten/plastisol polymer?
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ATeflon (PTFE)
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BBakelite (phenolic)
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CSBR (styrene–butadiene rubber)
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DPVC (polyvinyl chloride)
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EEVA (ethylene–vinyl acetate)
Answer
Correct Answer: PVC (polyvinyl chloride)
Explanation
Introduction / Context:Artificial leather products such as rexine are widely used. The base fabric is typically coated with a PVC plastisol or organosol, then gelled and fused to create a durable, leather-like surface.
Given Data / Assumptions:
- Rexine is historically associated with PVC-coated fabrics.
- Processing employs PVC dispersions with plasticisers and stabilisers, then heat-fusing.
- Other listed polymers do not match the classic rexine process.
Concept / Approach:PVC’s ability to form flexible, embossed films with good abrasion resistance and cleanability makes it ideal for coated fabrics that mimic leather. PTFE and phenolics are unsuitable; SBR is used in rubberised fabrics but not the canonical “rexine”; EVA appears in footwear foams rather than leather-like coatings.
Step-by-Step Solution:Identify polymer commonly used in leatherette coatings.Confirm PVC plastisol technology.Select PVC.
Verification / Alternative check:Manufacturing descriptions of PVC coated fabrics detail plastisol coating, gelation, and embossing steps typical for rexine.
Why Other Options Are Wrong:PTFE/Bakelite: incompatible with flexible coated fabric processing.SBR: rubber coatings exist but are not “rexine.”EVA: used more for foams/films, not classic leatherette coatings.
Common Pitfalls:Confusing generic “artificial leather” with any polymer coating; rexine is specifically associated with PVC.
Final Answer:PVC (polyvinyl chloride)