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In drape forming technique _______ is used for forming.

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+1 vote
in Food Packaging Technology by (63.0k points)
In drape forming technique _______ is used for forming.

(a) Vacuum

(b) High pressure

(c) High Temperature

(d) Low pressure

I got this question in an interview for internship.

My question is from Thermoforming in section Thermoplastic Polymers Properties & Processing of Food Packaging Technology

1 Answer

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Best answer
Correct answer is (a) Vacuum

To explain: In drape forming technique vacuum is used for forming. In vacuum forming, vacuum is heated below the preheated plastic sheet to draw sheet into cold mold cavity. The steps include heating the plastic sheet, placing the softened sheet is placed over a concave activity. Vacuum draws the sheet into cold cavity. The final product is then cooled.

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