Long film

Patent metadata

Field	Value
Publication number	US-10557004-B2
Application number	US-201716075270-A
Country	US
Kind code	B2
Filing date	Feb 3, 2017
Priority date	Feb 26, 2016
Publication date	Feb 11, 2020
Grant date	Feb 11, 2020

Abstract

A long-length film including a plurality of knurl portions shaped by continuous linear concavo-convex portions on at least one surface thereof, wherein the plurality of knurl portions are aligned in a lengthwise direction of the long-length film, a planar shape of the knurl portion seen from a thickness direction of the long-length film includes: 10 or more corners having a curvature radius of 0.3 mm or less and an angle of 100° or less or a curvature radius of 0.2 mm or less and an angle of 120° or less, per one planar shape of the knurl portion; and 18 or more straight portions having a straight shape, per one planar shape of the knurl portion.

First claim

The invention claimed is:

1. A long-length film comprising a plurality of knurl portions shaped by continuous linear concavo-convex portions on at least one surface thereof, wherein
the plurality of knurl portions are aligned in a lengthwise direction of the long-length film,
a planar shape of the knurl portion seen from a thickness direction of the long-length film includes:
10 or more corners having a curvature radius of 0.3 mm or less and an angle of 100° or less or a curvature radius of 0.2 mm or less and an angle of 120° or less, per one planar shape of the knurl portion; and
18 or more straight portions having a straight shape, per one planar shape of the knurl portion.

2. The long-length film according to claim 1 , wherein a ratio L TD /L MD between a length L TD of one knurl portion in a widthwise direction of the long-length film and a length L MD of one knurl portion in a lengthwise direction of the long-length film satisfies L TD /L MD ≥2.

3. The long-length film according to claim 1 , comprising a substrate layer formed of any of a cyclic olefin resin and a (meth)acrylic resin.

4. The long-length film according to claim 3 , comprising the substrate layer and a functional layer disposed on a side of the knurl portions of the substrate layer, wherein
the functional layer has a thickness which is 10% or less of a thickness of the substrate layer.

5. The long-length film according to claim 2 , comprising a substrate layer formed of any of a cyclic olefin resin and a (meth)acrylic resin.

6. The long-length film according to claim 5 , comprising the substrate layer and a functional layer disposed on a side of the knurl portions of the substrate layer, wherein
the functional layer has a thickness which is 10% or less of a thickness of the substrate layer.

Assignees

• Zeon Corp

Inventors

• Murata Naoki
• Hirano Masaya

Classifications

• C08J2345/00

  Characterised by the use of homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic ring system; Derivatives of such polymers · CPC title

• B29C59/16

  by wave energy or particle radiation {, e.g. infrared heating (B29C59/007 takes precedence)} · CPC title

• C08J2333/10

  Homopolymers or copolymers of methacrylic acid esters · CPC title

• C08J2333/06

  of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical · CPC title

• Y10T428/24479

  including variation in thickness · CPC title