POLYAMIDE COMPOSITION AND FILM AND METHOD FOR MANUFACTURING THE SAME

• US 20190322866A1
• Filed: 12/24/2018
• Published: 10/24/2019
• Est. Priority Date: 04/18/2018
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: WU, Jyh-Horng, LEU, Ming-Tsong, CHANG, Sheng-Lung, LIU, Hung-Jen, SHIAO, Po-Ling, LI, Yen-Cheng, CHANG, Yih-Her
• Granted Patent: US 11,084,262 B2
• Time in Patent Office: Days
• CPC Class Codes: B32B 15/088 comprising polyamides
• CPC Class Codes: B32B 15/20 comprising aluminium or copper B32B15/016 and B32B15/017 take precedence
• CPC Class Codes: B32B 2250/242 All polymers belonging to those covered by group B32B27/32
• CPC Class Codes: B32B 2270/00 Resin or rubber layer containing a blend of at least two different polymers
• CPC Class Codes: B32B 2307/306 Resistant to heat
• CPC Class Codes: B32B 2307/516 mono-axially
• CPC Class Codes: B32B 2307/518 bi-axially
• CPC Class Codes: B32B 2307/554 Wear resistance
• CPC Class Codes: B32B 2307/704 Crystalline
• CPC Class Codes: B32B 2307/7244 Oxygen barrier
• CPC Class Codes: B32B 2307/732 Dimensional properties
• CPC Class Codes: B32B 2439/70 Food packaging
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/302 comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
• CPC Class Codes: B32B 27/304 comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: B32B 27/306 comprising vinyl acetate or vinyl alcohol (co)polymers
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/34 comprising polyamides
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B32B 3/02 characterised by features of form at particular places, e.g. in edge regions non-uniform thickness B32B3/263
• CPC Class Codes: C08G 69/265 : from at least two different diamines or at least two different dicarboxylic acids
• CPC Class Codes: C08J 2377/02 : Polyamides derived from omega-amino carboxylic acids or from lactams thereof C08J2377/10 takes precedence
• CPC Class Codes: C08J 2477/06 : Polyamides derived from polyamines and polycarboxylic acids C08J2477/10 takes precedence
• CPC Class Codes: C08J 5/18 : Manufacture of films or sheets
• CPC Class Codes: C08L 2203/16 : used for films
• CPC Class Codes: C08L 2205/02 : containing two or more polymers of the same C08L -group
• CPC Class Codes: C08L 77/02 : Polyamides derived from omega-amino carboxylic acids or from lactams thereof C08L77/10 takes precedence
• CPC Class Codes: C08L 77/06 : Polyamides derived from polyamines and polycarboxylic acids C08L77/10 takes precedence
• CPC Class Codes: C09D 177/02 : Polyamides derived from omega-amino carboxylic acids or from lactams thereof C09D177/10 takes precedence

Abstract

A method of forming a film is provided, which includes providing a sheet from a polyamide composition; and biaxial stretching of the sheet to form a film, wherein the polyamide composition includes a blend of a first polyamide and a second polyamide. The first polyamide has a repeating unit of

and the second polyamide has repeating units of

The second polyamide is a crystalline random copolymer. The sheet of the polyamide composition is biaxially stretched at a rate of 20 mm/sec to 100 mm/sec.

Claims

1. A polyamide composition, comprising:

a blend of a first polyamide and a second polyamide,

wherein the first polyamide has a repeating unit of

2. The polyamide composition as claimed in claim 1, wherein the first polyamide and the second polyamide have a weight ratio of 90:

10 to 70;

30.

3. The polyamide composition as claimed in claim 1, wherein the first polyamide and the second polyamide have a weight ratio of 85:

15 to 75;

25.

4. The polyamide composition as claimed in claim 1, wherein the repeating units

5. The polyamide composition as claimed in claim 1, wherein the first polyamide has a relative viscosity of 2.5 to 4.0 at 25°

C.

6. The polyamide composition as claimed in claim 1, wherein the second polyamide has a relative viscosity of 1.01 to 2.5 at 25°

C.

7. A film, comprising a polyamide composition including a blend of a first polyamide and a second polyamide,

wherein the first polyamide has a repeating unit of

8. The film as claimed in claim 7, being laminated to a polymer film, a metal foil, or a combination thereof to form a laminated film.

9. A method of forming a film, comprising:

providing a sheet from a polyamide composition; and

biaxial stretching of the sheet to form a film, wherein the polyamide composition includes a blend of a first polyamide and a second polyamide;

wherein the first polyamide has a repeating unit of

10. The method as claimed in claim 9, wherein the sheet from the polyamide composition is biaxially stretched at a rate of 20 mm/sec to 40 mm/sec.