Ionomer for food wrap has enhanced permeability.
The first of the new resins boasts high oxygen transmission rates (OTR) plus tight cling to product, good machineability, and ease of cutting. Applications include multilayer films for premade bags, form-fill-seal, and vacuum skin packaging of fresh produce and fish. These resins are also well-suited to monolayer thermoformed packages for single-serve fresh-fruit cups.
Properties include a 0.94 g/cc density, oxygen permeation value (OPV) of 1300 cc-mil/100 in. (2)-day, secant flex modulus of 21,000 psi, and tensile strength of 24,000 psi. The modified ionomers have improved heat resistance, so they can be used as the outer layer of a multilayer structure, and are stiffer than other materials with high OTR, such as EVA, EMA, and mLLDPE (especially at lower densities). Tel: (302) 999-5912 * www.dupont.com
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|Title Annotation:||KEEPING UP WITH: Materials|
|Date:||Mar 1, 2007|
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