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.