Paper
This chapter considers the historical and present role played by paper substrates in flexible packaging. Various grades of paper, representing different chemical (e.g., sizing) and physical (e.g., calendaring) treatments during paper making, are presented. The effects of the treatments on the physical properties of paper are addressed. Coatings on paper for visual and functional effects often enhance the material’s utility in packages. Paper’s dead fold and tear properties combination is unique in the array of substrates used in flexible packaging. Its properties in lamination with other materials often provide cost effective and unique package performance attributes for customer applications. Along with cellophane, paper represents one ...
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