Laminated sheet and electronic component packaging container molded using same

Patent metadata

Field	Value
Publication number	US-11292233-B2
Application number	US-201916954340-A
Country	US
Kind code	B2
Filing date	Jan 23, 2019
Priority date	Jan 24, 2018
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

A laminated sheet with a cover material, an adhesive cover tape, and an electronic component packaging container molded. A laminated sheet having a surface layer on both sides of a substrate layer, and the substrate layer includes 30 to 70 mass % of a component mentioned below, 70 to 30 mass % of a component mentioned below, and 0 to 30 mass % of a recycled material of the laminated sheet to the total mass of the substrate layer. The component is a rubber modified (meth)acrylic acid ester-vinyl aromatic hydrocarbon copolymer having a conjugated diene rubber component content of 5 to 15 mass %. The component is a vinyl aromatic hydrocarbon-conjugated diene block copolymer containing 15 to 30 mass % of monomeric units derived from conjugated dienes. The component is at least one polymer selected from the group consisting of a vinyl aromatic hydrocarbon polymer and a rubber modified vinyl aromatic hydrocarbon polymer.

First claim

The invention claimed is:

1. A laminated sheet having a surface layer on both sides of a substrate layer, wherein the surface layer comprises an (A) component, and the substrate layer comprises 30 to 70 mass % of a (B) component, 70 to 30 mass % of a (C) component, and 0 to 30 mass % of a recycled material of the laminated sheet with respect to a total mass of the substrate layer,
wherein the (A) component is a rubber modified (meth)acrylic acid ester-vinyl aromatic hydrocarbon copolymer having a conjugated diene rubber component content of 5 to 15 mass %,
the (B) component is a vinyl aromatic hydrocarbon-conjugated diene block copolymer containing 15 to 30 mass % of monomeric units derived from conjugated dienes, and
the (C) component is at least one polymer selected from the group consisting of a vinyl aromatic hydrocarbon polymer and a rubber modified vinyl aromatic hydrocarbon polymer.

2. The laminated sheet according to claim 1 , wherein the (A) component has a weight-average molecular weight (Mw) of 110,000 to 170,000, the (B) component has a weight-average molecular weight (Mw) of 80,000 to 220,000, and the (C) component has a weight-average molecular weight (Mw) of 150,000 to 400,000.

3. The laminated sheet according to claim 1 , wherein the laminated sheet has a tensile elastic modulus of 1,000 to 2,500 MPa as measured by an evaluation method in accordance with JIS-K-7127.

4. The laminated sheet according to claim 1 , wherein the laminated sheet has a folding endurance of 30 times or more as measured by an evaluation method in accordance with JIS-P-8115.

5. The laminated sheet according to claim 1 , wherein the laminated sheet has a total light transmittance of 80 to 100% as measured by an evaluation method in accordance with JIS-K-7105.

6. The laminated sheet according to claim 1 , wherein the laminated sheet has a refractive index difference of 0 to 0.05 between the surface layer and the substrate layer.

7. An electronic component packaging container using the laminated sheet according to claim 1 .

8. The electronic component packaging container according to claim 7 , wherein the electronic component packaging container is a carrier tape.

9. The electronic component packaging container according to claim 7 , wherein the electronic component packaging container is a tray.

10. An electronic component package using the electronic component packaging container according to claim 7 .

Assignees

• Denka Company Ltd

Inventors

• YANAKA Ryosuke
• Masuda Yusuke

Classifications

• H10P72/7402

  Wafer tapes, e.g. grinding or dicing support tapes · CPC title

• H10W74/10

  characterised by their shape or disposition · CPC title

• H10W74/47

  comprising organic materials, e.g. plastics or resins · CPC title

• H10W74/01

  Manufacture or treatment · CPC title

• Y02W30/80

  Packaging reuse or recycling, e.g. of multilayer packaging (bio-packaging Y02W90/10) · CPC title