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_______ are defined as plastics whose apparent density is decreased.

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in Food Packaging Technology by (63.0k points)
_______ are defined as plastics whose apparent density is decreased.

(a) Cellular plastics

(b) Polyplastics

(c) Thermoplastics

(d) Artificial plastics

The question was posed to me in examination.

This intriguing question comes from Thermoforming in portion Thermoplastic Polymers Properties & Processing of Food Packaging Technology

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The correct answer is (a) Cellular plastics

Easy explanation: Cellular plastics are defined as plastics whose apparent density is decreased substantially by the presence of numerous cells dispersed throughout their mass. The terms foamed plastic, expanded plastic and plastic foam are also used for cellular plastics. They have desirable properties such as, high strength-to- weight ratio and good insulating and cushioning properties.

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