Polyurethane particle foam with polyurethane coating
US-2017051121-A1 · Feb 23, 2017 · US
Expanded thermoplastic polyurethane particles and expanded thermoplastic polyurethane particle molded article
US10793694B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10793694-B2 |
| Application number | US-201615578608-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 25, 2016 |
| Priority date | Jun 1, 2015 |
| Publication date | Oct 6, 2020 |
| Grant date | Oct 6, 2020 |
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- Title
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- Abstract
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- First independent claim
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Abstract
Official abstract text for this publication.
Provided are expanded beads capable of providing an expanded thermoplastic polyurethane beads molded article which is excellent in physical properties, such as compression characteristics, repulsion elasticity, etc., and an expanded thermoplastic polyurethane beads molded article. Expanded beads of thermoplastic polyurethane, wherein a Shore A hardness of the thermoplastic polyurethane is 85 or more; an average cell diameter of the expanded beads is 50 to 300 μm; and a closed cell ratio when bisecting the expanded thermoplastic polyurethane bead is 60% or more; and an expanded thermoplastic polyurethane beads molded article obtained through in-mold molding of the same are disclosed.
First claim
Opening claim text (preview).
The invention claimed is: 1. Expanded beads of thermoplastic polyurethane, wherein a Shore A hardness of the thermoplastic polyurethane is 85 or more and 95 or less; an average cell diameter of the expanded beads on a cut surface when bisecting the expanded bead is from 50 to 300 μm; and a closed cell ratio (D) when bisecting the expanded bead is 60% or more, wherein a ratio (A/B) of the average cell diameter (A) in a central part of the expanded bead to an average cell diameter (B) in a surface layer part of the expanded bead is from 0.5 to 2, wherein the central part is one internal portion of a trisected line segment on the cut surface, and the surface layer part is two external portions of the trisected line segment on the cut surface. 2. 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 thermoplastic polyurethane is 60 g/10 min or less. 3. The expanded beads of thermoplastic polyurethane according to claim 1 , wherein a softening temperature of the thermoplastic polyurethane is from 110 to 160° C. 4. The expanded beads of thermoplastic polyurethane according to claim 1 , wherein an apparent density of the expanded beads is 0.3 g/cm 3 or less. 5. An expanded thermoplastic polyurethane beads molded article obtained through in-mold molding of the expanded beads of thermoplastic polyurethane according to claim 1 . 6. The expanded beads of thermoplastic polyurethane according to claim 1 , wherein the average cell diameter (A) in the central part of the expanded bead is 250 μm or less. 7. The expanded beads of thermoplastic polyurethane according to claim 1 , wherein the ratio (A/B) of the average cell diameter (A) in the central part of the expanded bead to an average cell diameter (B) in the surface layer part of the expanded bead is from 1 to 1.6. 8. The expanded beads of thermoplastic polyurethane according to claim 4 , wherein the apparent density of the expanded beads is 0.02 g/cm 3 to 0.2 g/cm 3 . 9. The expanded beads of thermoplastic polyurethane according to claim 1 , wherein the closed cell ratio (D) when bisecting the expanded bead is 70% or more.
Assignees
Inventors
Classifications
Heating by introducing steam in the mould · CPC title
Making or treating expandable particles · CPC title
Closed cells, i.e. more than 50% of the pores are closed · CPC title
Density · CPC title
with closed cells · CPC title
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Frequently asked questions
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- What does patent US10793694B2 cover?
- Provided are expanded beads capable of providing an expanded thermoplastic polyurethane beads molded article which is excellent in physical properties, such as compression characteristics, repulsion elasticity, etc., and an expanded thermoplastic polyurethane beads molded article. Expanded beads of thermoplastic polyurethane, wherein a Shore A hardness of the thermoplastic polyurethane is 85 or…
- Who is the assignee on this patent?
- Jsp Corp
- What technology area does this patent fall under?
- Primary CPC classification C08J9/18. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Oct 06 2020 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).