Polymer Technology
Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.

Acrylic
Nylon 6:6
Polyester
Polypropylene

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Polymer Technology
Dacron is a

None of these
Thermosetting material
Condensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol
Condensation polymerisation product of hexamethylene diamine and adipic acid

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Polymer Technology
Polyvinyl chloride (PVC)

Uses either emulsion or suspension polymerisation methods
Can be made thermosetting by adding a plasticiser
Is produced by polycondensation reaction
Softening temperature is 200°C

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