Polyolefin resin foam sheet and adhesive tape
US-2017292002-A1 · Oct 12, 2017 · US
Polyolefin resin foam sheet and adhesive tape
US10125201B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10125201-B2 |
| Application number | US-201515514093-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 29, 2015 |
| Priority date | Sep 30, 2014 |
| Publication date | Nov 13, 2018 |
| Grant date | Nov 13, 2018 |
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Abstract
Official abstract text for this publication.
There is provided a polyolefin resin foam sheet having a plurality of cells which is formed by foaming a polyolefin resin composition, wherein the polyolefin resin composition contains a polyolefin resin (A) having relatively high density and a polyolefin resin (B) having relatively low density, and the weighted average resin density of the polyolefin resin (A) and the polyolefin resin (B) is 0.900 g/cm 3 or less; and wherein a ratio [TD strength at break/MD maximum cell size] and a ratio [MD strength at break/TD maximum cell size] are both 45 kPa/μm or more.
First claim
Opening claim text (preview).
The invention claimed is: 1. A polyolefin resin foam sheet having a plurality of cells which is formed by foaming a polyolefin resin composition, wherein the polyolefin resin composition contains a polyolefin resin (A) and a polyolefin resin (B), and the weighted average resin density of the polyolefin resin (A) and the polyolefin resin (B) is 0.900 g/cm 3 or less; and wherein, in the polyolefin resin foam sheet, a ratio of strength at break in the TD direction to the maximum cell size in the MD direction, [TD strength at break/MD maximum cell size], and a ratio of strength at break in the MD direction to the maximum cell size in the TD direction, [MD strength at break/TD maximum cell size], are both 45 kPa/μm or more, wherein the polyolefin resin (A) is one or more selected from the group consisting of polyolefin resins having a density of 0.900 g/cm 3 or more, and the polyolefin resin (B) is one or more selected from the group consisting of polyolefin resins having a density of less than 0.900g/cm 3 , wherein both the polyolefin resin (A) and the polyolefin (B) are a poly ethylene resin. 2. The polyolefin resin foam sheet according to claim 1 , wherein an average value of the ratio [TD strength at break/MD maximum cell size] and the ratio [MD strength at break/TD maximum cell size] is 50 kPa/μm or more. 3. The polyolefin resin foam sheet according to claim 1 , wherein the polyolefin resin foam sheet is crosslinked. 4. The polyolefin resin foam sheet according to claim 1 , wherein a mass ratio of the polyolefin resin (A) to the polyolefin resin (B), [(A)/(B)], is 0.20 to 10. 5. The polyolefin resin foam sheet according to claim 1 , wherein the polyethylene resin is polymerized with a metallocene polymerization catalyst. 6. An adhesive tape having a pressure sensitive adhesive layer provided on at least one surface of the polyolefin resin foam sheet according to claim 1 .
Assignees
Inventors
Classifications
Adhesive · CPC title
Polyethene · CPC title
Micropores, i.e. average diameter being between 0,1 micrometer and 0,1 millimeter · CPC title
- C08F10/02Primary
Ethene · CPC title
based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds · CPC title
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Frequently asked questions
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- What does patent US10125201B2 cover?
- There is provided a polyolefin resin foam sheet having a plurality of cells which is formed by foaming a polyolefin resin composition, wherein the polyolefin resin composition contains a polyolefin resin (A) having relatively high density and a polyolefin resin (B) having relatively low density, and the weighted average resin density of the polyolefin resin (A) and the polyolefin resin (B) is 0…
- Who is the assignee on this patent?
- Sekisui Chemical Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08F10/02. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 13 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).