Oriented polymeric articles and method
First Claim
1. A method of making fibers comprising:
- forming a polymeric film havinga body having a first surface and a second surface and having a longitudinal dimension, anda plurality of elongate microstructured surface features disposed on the first surface of the body in a direction substantially parallel to the longitudinal dimension of the body, wherein the microstructured surface features are substantially parallel;
stretching the polymeric film in a direction substantially parallel to the longitudinal dimension of the body; and
separating the stretched polymeric film along generally longitudinally disposed separation lines to define a plurality of discrete fiber elements, wherein one or more of the fiber elements have at least one microstructured surface feature thereon.
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Abstract
Stretched articles, such as oriented polymeric films or fibers, having microstructure features on at least one surface thereof, and processes for making such articles, are disclosed. A method of making fibers comprises forming a polymeric film having a body having a first surface and a second surface and having a longitudinal dimension. The film also comprises a plurality of elongate microstructure features disposed on the first surface of the body in a direction substantially parallel to the longitudinal dimension of the body, wherein the elongate microstructure features are substantially parallel. The method further comprises stretching the polymeric film in a direction substantially parallel to the longitudinal dimension of the body, and fibrillating the stretched polymeric film along the longitudinal dimension of the body to provide one or more fibers, wherein each fiber has at least one microstructure feature thereon.
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Citations
38 Claims
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1. A method of making fibers comprising:
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forming a polymeric film having a body having a first surface and a second surface and having a longitudinal dimension, and a plurality of elongate microstructured surface features disposed on the first surface of the body in a direction substantially parallel to the longitudinal dimension of the body, wherein the microstructured surface features are substantially parallel; stretching the polymeric film in a direction substantially parallel to the longitudinal dimension of the body; and separating the stretched polymeric film along generally longitudinally disposed separation lines to define a plurality of discrete fiber elements, wherein one or more of the fiber elements have at least one microstructured surface feature thereon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of making fibers comprising:
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forming a polymeric film having a body having a first surface and a second surface and having a longitudinal dimension, and a plurality of elongate microstructured surface features disposed on the first surface of the body in a direction substantially parallel to the longitudinal dimension of the body, wherein the elongate microstructured surface features are substantially parallel; stretching the polymeric film in a direction substantially parallel to the longitudinal dimension of the body; and fibrillating the stretched polymeric film along the longitudinal dimension of the body to provide one or more fibers, wherein each fiber has at least one microstructured surface feature thereon. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification