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Microlayer structures and methods

  • US 8,043,696 B2
  • Filed: 10/20/2005
  • Issued: 10/25/2011
  • Est. Priority Date: 10/22/2004
  • Status: Expired due to Fees
First Claim
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1. An elongated member, comprising:

  • at least 10 stacked and coextruded polymer layers that each are continuous in profile and include a polyolefinic polymer, each layer having a thickness less than about 50 microns, and at least two adjoining layers differ relative to their peak melting temperature and differ in their molecular orientation, and wherein the member is prepared by drawing at a draw ratio of greater than 18 wherein the drawing includes a step of stretching at a temperature above the melting point of one of the adjoining layers and below the melting point of the other adjoining layer.

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