Method for making and converting a centerfolded film

作者: Alan S. Weinberg , Blaine C. Childress

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摘要: A method includes the steps of providing a tubing having an inner annular layer comprising crosslinked polymeric material, and outer non-crosslinked or material that is to lesser extent than layer; longitudinally slitting form folded film; reverse centerfolding film provide lateral slit edge, edge opposite said such becomes layer, layer. bag can be made from centerfolded film, article as food packaged in bag.

参考文章(6)
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Alan S. Weinberg, Joseph Zu Sun, Norman D. Bornstein, Henry G. Schirmer, Donald J. D'Entremont, Heat shrinkable multi-layer film of hydrolyzed ethylene vinyl acetate and a cross-linked olefin polymer ,(1975)
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