Uniaxially oriented articles having structured surface
First Claim
1. A uniaxially oriented structured article comprising:
- (a) a polymeric body having (i) a first and a second surface, and (ii) first and second in-plane axes that are orthogonal with respect to each other and a third axis that is mutually orthogonal to the first and second in-plane axis in a thickness direction of the polymeric film; and
(b) a surface portion comprising a linear geometric feature disposed on the first surface of the polymeric body, the linear geometric feature being disposed on the body in a direction substantially parallel to the first in-plane axis of the polymeric film;
ratio of the thickness of the polymeric body to the height of the geometric feature is at least about 2.
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Accused Products
Abstract
Uniaxially Oriented Articles Having Structured Surface A process for uniaxially stretching films is having a structured surface comprising a geometric feature is described. The process provides a film in which the cross sectional shape of the feature after stretching is substantially identical to the cross sectional shape of the feature prior to stretching. Structured surface articles are also described. The articles have substantially the same uniaxial orientation throughout the film, including the geometric structure. Uniaxially oriented articles having structured surfaces are described. The articles have dimensional relationships as follows: the (a) ratio of the thickness of the body (Z′) to the height of the geometric feature (P′) is at least about 2; or (b) the ratio of body thickness to feature height (Z′:P′) is at least about 1 and the ratio of feature height to feature separation (P′:FS′) is at least about 1; or (c) the ratio of body thickness to feature height (Z′:P′) is at least about 1 and the ratio of feature base width to feature separation (BW′:FS′) is at least about 1; or (d) the ratio of body thickness to feature base width (Z′:BW′) is at least about 3; or (e) the ratio of body thickness to feature base width (Z′:BW′) is at least about 1 and the ratio of feature height to feature separation (P′:FS′) is at least about 1; or (f) the ratio of body thickness to feature base width (Z′:BW′) is at least about 1 and the ratio of feature base width to feature separation (BW′:FS′) is at least about 1; or (g) the ratio of feature base width to feature top width (BW′:TW′) is at least about 2 and the ratio of feature base width to feature separation (BW′:FS′) is at least about 1.
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Citations
20 Claims
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1. A uniaxially oriented structured article comprising:
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(a) a polymeric body having (i) a first and a second surface, and (ii) first and second in-plane axes that are orthogonal with respect to each other and a third axis that is mutually orthogonal to the first and second in-plane axis in a thickness direction of the polymeric film; and
(b) a surface portion comprising a linear geometric feature disposed on the first surface of the polymeric body, the linear geometric feature being disposed on the body in a direction substantially parallel to the first in-plane axis of the polymeric film;
ratio of the thickness of the polymeric body to the height of the geometric feature is at least about 2. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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2. A uniaxially oriented structured article comprising:
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(a) a polymeric body having (i) a first and a second surface, and (ii) first and second in-plane axes that are orthogonal with respect to each other and a third axis that is mutually orthogonal to the first and second in-plane axis in a thickness direction of the polymeric film; and
(b) a surface portion comprising a linear geometric feature disposed on the first surface of the polymeric body, the linear geometric feature being disposed on the body in a direction substantially parallel to the first in-plane axis of the polymeric film;
wherein the ratio of the thickness of the body to the height of the feature is at least about 1 and the ratio of the height of the feature to the feature separation is at least about 1.
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3. A uniaxially oriented structured article comprising:
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(a) a polymeric body having (i) a first and a second surface, and (ii) first and second in-plane axes that are orthogonal with respect to each other and a third axis that is mutually orthogonal to the first and second in-plane axis in a thickness direction of the polymeric film; and
(b) a surface portion comprising a linear geometric feature disposed on the first surface of the polymeric body, the linear geometric feature being disposed on the body in a direction substantially parallel to the first in-plane axis of the polymeric film;
wherein ratio of the thickness of the body to the width of the base is at least about 3.
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4. A uniaxially oriented structured article comprising:
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(a) a polymeric body having (i) a first and a second surface, and (ii) first and second in-plane axes that are orthogonal with respect to each other and a third axis that is mutually orthogonal to the first and second in-plane axis in a thickness direction of the polymeric film; and
(b) a surface portion comprising a linear geometric feature disposed on the first surface of the polymeric body, the linear geometric feature being disposed on the body in a direction substantially parallel to the first in-plane axis of the polymeric film;
wherein the ratio of the thickness of the body to the width of the base is at least about 1 and the ratio of the width of the base to the feature separation is at least about 1.
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Specification