LAYERED BODY

• US 20160204337A1
• Filed: 08/29/2014
• Published: 07/14/2016
• Est. Priority Date: 09/02/2013
• Status: Abandoned Application

• Current Assignee: Mitsui Chemicals Incorporated (Mitsui Chemicals)
• Original Assignee: Mitsui Chemicals Incorporated (Mitsui Chemicals)
• Inventors: YOSHIDA, Mitsunobu, TANIMOTO, Kazuhiro, NISHIKAWA, Shigeo
• Application Number:
  US14/911,919
• Publication Number:
  US 20160204337A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B32B 2307/306 Resistant to heat
• CPC Class Codes: B32B 2307/704 Crystalline
• CPC Class Codes: B32B 2307/718 Weight, e.g. weight per square meter
• CPC Class Codes: B32B 2307/7246 Water vapor barrier
• CPC Class Codes: B32B 2457/00 Electrical equipment
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/18 characterised by the use of special additives
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: H10N 30/098 Forming organic materials
• CPC Class Codes: H10N 30/857 Macromolecular compositions
• CPC Class Codes: H10N 30/883 Further insulation means against electrical, physical or chemical damage, e.g. protective coatings

Abstract

A layered body including a polymeric piezoelectric body which includes an optically active aliphatic polyester (A) having a weight average molecular weight of from 50,000 to 1,000,000 and has crystallinity obtained by a DSC method, of from 20% to 80%, and a layer (X) which is in contact with the polymeric piezoelectric body and has an acid value of 10 mg KOH/g or less.

Claims

1. A layered body comprising:

a polymeric piezoelectric body which contains an optically active aliphatic polyester (A) having a weight average molecular weight of from 50,000 to 1,000,000 and has crystallinity obtained by a DSC method, of from 20% to 80%; and

a layer (X) which is in contact with the polymeric piezoelectric body and has an acid value of 10 mgKOH/g or less.

2. The layered body according to claim 1, wherein the layer (X) is an easy adhesive layer, an adhesive layer, a pressure sensitive adhesive layer, a hard coat layer, an antistatic layer, an antiblock layer, or a refractive index adjusting layer.

3. The layered body according to claim 1, wherein the layer (X) is a pressure sensitive adhesive layer or an adhesive layer.

4. The layered body according to claim 1, wherein the acid value of the layer (X) is 0.01 mgKOH/g or more.

5. The layered body according to claim 1, wherein a total amount of nitrogen in the layer (X) is from 0.05% by mass to 10% by mass.

6. The layered body according to claim 1, wherein the polymeric piezoelectric body includes from 0.01 parts by mass to 10 parts by mass of a stabilizer (B), which has at least one functional group selected from the group consisting of a carbodiimide group, an epoxy group, and an isocyanate group, and has a weight average molecular weight of from 200 to 60,000, with respect to 100 parts by mass of the aliphatic polyester (A).

7. The layered body according to claim 6, wherein the stabilizer (B) includes a stabilizer (B1), which has at least one functional group selected from the group consisting of a carbodiimide group, an epoxy group, and an isocyanate group, and has a weight average molecular weight of from 200 to 900, and wherein the stabilizer (B) includes a stabilizer (B2) which has, in one molecule, two or more functional groups of one or more kinds selected from the group consisting of a carbodiimide group, an epoxy group, and an isocyanate group, and has a weight average molecular weight of from 1,000 to 60,000.

8. The layered body according to claim 1, wherein the polymeric piezoelectric body has an internal haze with respect to visible light, of 50% or less, and a piezoelectric constant d₁₄ measured at 25°

C. by a stress-charge method, of 1 pC/N or more.

9. The layered body according to claim 1, wherein the polymeric piezoelectric body has an internal haze with respect to visible light, of 13% or less, and includes from 0.01 parts by mass to 2.8 parts by mass of a stabilizer (B), which has at least one functional group selected from the group consisting of a carbodiimide group, an epoxy group, and an isocyanate group, and has a weight average molecular weight of from 200 to 60,000, with respect to 100 parts by mass of the aliphatic polyester (A).

10. The layered body according to claim 1, wherein the polymeric piezoelectric body has a product of the crystallinity and a standardized molecular orientation MORc measured by a microwave transmission-type molecular orientation meter based on a reference thickness of 50 μ

m, of from 25 to 700.

11. The layered body according to claim 1, wherein the aliphatic polyester (A) is a polylactic acid polymer having a main chain containing a repeating unit represented by the following Formula (1)

12. The layered body according to claim 1, wherein the aliphatic polyester (A) has an optical purity of 95.00% ee or more.

13. The layered body according to claim 1, wherein a content of the aliphatic polyester (A) in the polymeric piezoelectric body is 80% by mass or more.