Expanded thermoplastic polyurethane particles and expanded thermoplastic polyurethane particle molded article
US-10793694-B2 · Oct 6, 2020 · US
Expanded thermoplastic polyurethane particles and expanded thermoplastic polyurethane particle molded article
US11208537B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11208537-B2 |
| Application number | US-201716463755-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 15, 2017 |
| Priority date | Nov 28, 2016 |
| Publication date | Dec 28, 2021 |
| Grant date | Dec 28, 2021 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
The present invention provides expanded beads of thermoplastic polyurethane, wherein the thermoplastic polyurethane constituting the expanded beads is an ether-based thermoplastic polyurethane, and a difference (T1−T2) between a melting peak temperature (T1) and a melting peak temperature (T2) is from 0 to 8° C., wherein the melting peak temperature (T1) is a melting peak temperature at the time of first heating in a DSC curve obtained by heating the expanded beads from 20° C. to 260° C. at a heating rate of 10° C./min, the melting peak temperature (T2) is a melting peak temperature at the time of second heating in a DSC curve obtained by cooling from 260° C. to 20° C. at a cooling rate of 10° C./min after the first heating and further heating again from 20° C. to 260° C. at a heating rate of 10° C./min, and the DSC curves are obtained by the heat flux differential scanning calorimetry in conformity with JIS K7121-1987. The expanded beads of thermoplastic polyurethane not only have excellent surface appearance and fusion bonding properties but also have a low shrinkage factor.
First claim
Opening claim text (preview).
The invention claimed is: 1. Expanded beads of thermoplastic polyurethane, wherein the thermoplastic polyurethane constituting the expanded beads is an ether-based thermoplastic polyurethane, and a difference (T 1 −T 2 ) between a melting peak temperature (T 1 ) and a melting peak temperature (T 2 ) is from 0 to 8° C., wherein the melting peak temperature (T 1 ) is a melting peak temperature at the time of first heating in a DSC curve obtained by heating the expanded beads from 20° C. to 260° C. at a heating rate of 10° C./min, the melting peak temperature (T 2 ) is a melting peak temperature at the time of second heating in a DSC curve obtained by cooling from 260° C. to 20° C. at a cooling rate of 10° C./min after the first heating and further heating again from 20° C. to 260° C. at a heating rate of 10° C./min, and the DSC curves are obtained by the heat flux differential scanning calorimetry in conformity with JIS K7121-1987, wherein a type A durometer hardness of the thermoplastic polyurethane is 85 to 90, and wherein an average cell diameter of the expanded beads is 100 μm to 400 μm. 2. The expanded beads of thermoplastic polyurethane according to claim 1 , wherein the difference (T 1 −T 2 ) between the melting peak temperature (T 1 ) at the time of first heating and the melting peak temperature (T 2 ) at the time of second heating is from 1 to 6° C. 3. The expanded beads of thermoplastic polyurethane according to claim 1 , wherein the melting peak temperature (T 2 ) at the time of second heating is from 155 to 170° C. 4. The expanded beads of thermoplastic polyurethane according to claim 1 , wherein a melt flow rate at 190° C. under a load of 10 kg of the expanded beads is from 18 to 35 g/10 min. 5. The expanded beads of thermoplastic polyurethane according to claim 1 , wherein an apparent density of the expanded beads is from 80 to 300 kg/m 3 . 6. An expanded thermoplastic polyurethane beads molded article obtained through in-mold molding of the expanded beads of thermoplastic polyurethane according to claim 1 . 7. The expanded beads of thermoplastic polyurethane according to claim 1 , wherein the thermoplastic polyurethane consists essentially of the ether-based thermoplastic polyurethane. 8. The expanded beads of thermoplastic polyurethane according to claim 1 , wherein the average cell diameter of the expanded beads is 150 μm to 400 μm.
Assignees
Inventors
Classifications
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11208537B2 cover?
- The present invention provides expanded beads of thermoplastic polyurethane, wherein the thermoplastic polyurethane constituting the expanded beads is an ether-based thermoplastic polyurethane, and a difference (T1−T2) between a melting peak temperature (T1) and a melting peak temperature (T2) is from 0 to 8° C., wherein the melting peak temperature (T1) is a melting peak temperature at the tim…
- Who is the assignee on this patent?
- Jsp Corp
- What technology area does this patent fall under?
- Primary CPC classification C08J9/122. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 28 2021 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).