Materials science of waterproof fabrics: Why are raincoats and tents waterproof? Consider the property or treatment that prevents water penetration through fabric. Choose the correct option.

Difficulty: Easy

Because of surface tension of water alone
Due to tight weaving only with no coating
Because they are coated/laminated (e.g., with rubber, PVC, PU) to block pores and prevent capillary action
Because water has zero viscosity

Correct Answer: Because they are coated/laminated (e.g., with rubber, PVC, PU) to block pores and prevent capillary action

Explanation:

Concept
Waterproofing is achieved by applying impermeable coatings/laminates that seal fabric pores and suppress capillary wicking. Surface tension alone cannot guarantee waterproofing under pressure.

Final Answer
Because they are coated/laminated (e.g., with rubber, PVC, PU) to block pores and prevent capillary action

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Materials science of waterproof fabrics: Why are raincoats and tents waterproof? Consider the property or treatment that prevents water penetration through fabric. Choose the correct option.

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