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PRODUCING PRESTRETCHED AND RELAXED PLASTICS WRAPPING FILM; STRETCHING EFFECTED IN COLD STATE
PRODUCING PRESTRETCHED AND RELAXED PLASTICS WRAPPING FILM; STRETCHING EFFECTED IN COLD STATE
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机译:生产预拉伸和松弛的塑料包装膜;拉伸态在冷态下有效
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摘要
A pre-stretched film (12) is provided along with an apparatus and a method for making it. A method and apparatus for making the pre-stretched film (12) is capable of: forming (16) a film from molten stock material; cooling (18) the film; stretching (48, 54) the cooled film beyond the stock material's yield point; and relaxing (64) the stretched film to reduce the tension therein. IMAGE
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