Long film, method for producing long film, method for producing long multilayer body, and long multilayer body

Patent metadata

Field	Value
Publication number	US-12083767-B2
Application number	US-202117562167-A
Country	US
Kind code	B2
Filing date	Dec 27, 2021
Priority date	Jul 10, 2019
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

As an exemplary configuration, a long film is configured by thermomeltable polymers including a first unit based on tetrafluoroethylene and a second unit based on perfluoro (alkyl vinyl ether), including spherulites of the thermomeltable polymers, wherein radius of each spherulite is 10 μm or less. As another exemplary configuration, a long film is configured by tetrafluoroethylene polymers having a melt flow rate within a range of 5 to 40 g/10 min. The long film is heated at 180° C. for 30 minutes so as to measure the thermal expansion rate, and when letting thermal expansion rate in a first direction, which extends at a 45-degree angle to a melt flow direction be A, and thermal expansion rate in a second direction orthogonal to the first direction be B, A and B are respectively within the range of −2 to +1%, and |A−B| is 1% or less.

First claim

The invention claimed is:

1. A long film comprising at least 90 mass % of one or more thermomeltable polymers based on a total mass % of said long film, said one or more thermomeltable polymers comprising 80 to 99 mol % of a first unit based on tetrafluoroethylene, 1 to 20 mol % of a second unit based on a perfluoro (alkyl vinyl ether), and a third unit based on a monomer having a polar functional group selected from itaconic anhydride, citraconic anhydride, 5-norbornene-2,3-dicarboxylic anhydride and maleic anhydride, wherein the long film comprises spherulites of the one or more thermomeltable polymers, and wherein a radius of each spherulite is 10 μm or less.

2. The long film according to claim 1 , wherein the one or more thermomeltable polymers further comprise a third unit based on a monomer having a polar functional group selected from itaconic anhydride, citraconic anhydride, and 5-norbornene-2,3-dicarboxylic anhydride.

3. The long film according to claim 1 , wherein the one or more thermomeltable polymers comprise 2 to 4 mol % of a unit based on perfluoro (alkyl vinyl ether) as the second unit.

4. The long film according to claim 1 , wherein a melt flow rate of the thermomeltable polymers is within a range of 5 to 40 g/10 min.

5. The long film according to claim 1 , wherein a haze of the long film having a thickness of 50 μm is within a range of 1 to 5%.

6. A long multilayer body comprising the long film of claim 1 and a conductive metal layer.

7. The long film according to claim 1 , wherein said long film has a melt flow rate within a range of 5 to 40 g/10 min, and wherein when the long film is heated at 180° C. for 30 minutes se as to measure the thermal expansion rate, a thermal expansion rate A in a first direction, which stretches at a 45-degree angle to a melt flow direction, and a thermal expansion rate B in a second direction orthogonal to the first direction, are such that A and B are respectively within the range of −2 to +1%, and |A−B| is 1% or less.

8. A long multilayer body comprising the long film of claim 2 and a conductive metal layer.

9. The long film according to claim 2 , wherein said long film has a melt flow rate within a range of 5 to 40 g/10 min, and wherein when the long film is heated at 180° C. for 30 minutes to measure the thermal expansion rate, a thermal expansion rate A in a first direction, which stretches at a 45-degree angle to a melt flow direction, and a thermal expansion rate B in a second direction orthogonal to the first direction, are such that A and B are respectively within the range of −2 to +1%, and |A−B| is 1% or less.

10. The long film according to claim 1 , wherein the radius of each spherulite is 0.2-7.5 μm.

11. The long film according to claim 2 , wherein the radius of each spherulite is 0.2-7.5 μm.

12. The long film according to claim 1 , comprising 100 mass % of said one or more thermomeltable polymers based on a total mass % of said long film.

13. The long film according to claim 2 , comprising 100 mass % of said one or more thermomeltable polymers based on a total mass % of said long film.

14. A long film comprising at least 90 mass % of one or more thermomeltable polymers based on a total mass % of said long film, said one or more thermomeltable polymers comprising a first unit based on tetrafluoroethylene, a second unit based on a perfluoro (alkyl vinyl ether), and a third unit based on monomers having a polar functional group selected from itaconic anhydride, citraconic anhydride, 5-norbornene-2,3-dicarboxylic anhydride and maleic anhydride, wherein:
the mol % of the first unit, the mol % of the second unit, and the mol % of the third unit in the one or more thermomeltable polymers are 90 to 99 mol %, 0.5 to 9.97 mol %, and 0.01 to 3 mol %, respectively,
the long film comprises spherulites of the one or more thermomeltable polymers, and
a radius of each spherulite is 10 μm or less.

15. The long film according to claim 14 , wherein the third unit is based on monomers having a polar functional group selected from itaconic anhydride, citraconic anhydride, and 5-norbornene-2,3-dicarboxylic anhydride.

Assignees

• Agc Inc

Inventors

• Kasai Wataru
• Horiguchi Yuya
• Kotera Seigo
• Hosoda Tomoya

Classifications

• C08J2427/12

  containing fluorine atoms · CPC title

• C08J2327/18

  Homopolymers or copolymers of tetrafluoroethylene · CPC title

• C08J5/18 Primary

  Manufacture of films or sheets · CPC title

• B32B2264/0257

  Polyolefin particles, e.g. polyethylene or polypropylene homopolymers or ethylene-propylene copolymers · CPC title

• B32B2264/0228

  Vinyl resin particles, e.g. polyvinyl acetate, polyvinyl alcohol polymers or ethylene-vinyl acetate copolymers · CPC title