초록 ▼

The present invention relates to film web substrates and more particularly to such web substrates wherein the inherent elongation properties of a given web material are modified. An exemplary web material is formed from first and second precursor webs. A first side of the web material is formed from

The present invention relates to film web substrates and more particularly to such web substrates wherein the inherent elongation properties of a given web material are modified. An exemplary web material is formed from first and second precursor webs. A first side of the web material is formed from the first precursor web and integral extensions of the second precursor web that extend through the first precursor web.

대표청구항 ▼

What is claimed is: 1. A web material for a container, said web material comprising a first precursor web and second precursor web, said first precursor web comprising a polymeric film material, said web material having a first side comprising said first precursor web and at least one protuberance

What is claimed is: 1. A web material for a container, said web material comprising a first precursor web and second precursor web, said first precursor web comprising a polymeric film material, said web material having a first side comprising said first precursor web and at least one protuberance having a linear orientation defining a longitudinal axis disposed thereon, each of said protuberances comprising said second precursor web, wherein said protuberances are integral extensions of said second precursor web extending through said first precursor web, said web material further comprising a second side comprising said second precursor web, said web material forming a semi-enclosed container having an opening defined by a periphery, said opening defining an opening plane, said container being expandable in response to forces exerted by contents within said container to provide an increase in volume of said container such that said container accommodates the contents placed therein. 2. The web material of claim 1, wherein said container includes a closure means for sealing said opening to convert said semi-enclosed container to a substantially closed container. 3. The web material of claim 1, wherein said web material is a planar sheet of material. 4. The web material of claim 1, wherein said protuberances comprise a second region and said first precursor web comprises a first region, a portion of said first region extending in a first direction while the remainder of said first region extends in a second direction perpendicular to said first direction to intersect one another, said first region forming a boundary completely surrounding said second region. 5. The web material of claim 4, wherein said first region and said second region are visually distinct from one another. 6. The web material of claim 4, wherein said first region is substantially free of said protuberances. 7. The web material of claim 1, wherein said web material exhibits at least two significantly different stages of resistive force to an applied axial elongation along at least one axis when subjected to the applied axial elongation in a direction parallel to the axis in response to an externally applied force upon said web material. 8. The web material of claim 1, wherein said container is a bag. 9. The web material of claim 1, wherein said first precursor web has elongation properties less than said second precursor web.