Porous material, producing method thereof, and serial producing apparatus thereof
US-2015376363-A1 · Dec 31, 2015 · US
Polypropylene resin foam particle and molding thereof
US9023904B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9023904-B2 |
| Application number | US-45191908-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 14, 2008 |
| Priority date | Jun 22, 2007 |
| Publication date | May 5, 2015 |
| Grant date | May 5, 2015 |
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Abstract
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A polypropylene resin foamed bead from which a foamed bead molded article excelling in appearance, heat resistance and mechanical properties can be obtained at the molding temperature lower than that for conventional polypropylene resin foamed beads; and a foamed bead molded article obtained by molding the same. The polypropylene resin foamed bead is characterized by having such a crystal structure that in the first DSC curve obtained when the temperature of the foamed bead sample is raised from ordinary temperature to 200° C. at a temperature rising rate of 2° C./min by a differential scanning calorimetry, there appear a main endothermic peak of 100° to 140° C. endothermic peak apex temperature exhibiting 70 to 95% endothermic peak calorific value based on the total endothermic peak calorific value and two or more endothermic peaks exhibited on the high temperature side with respect to the main endothermic peak.
First claim
Opening claim text (preview).
The invention claimed is: 1. A polypropylene resin foamed bead having a crystal structure which indicates a main endothermic peak exhibiting an endothermic peak calorific value of 80 to 95% of the total endothermic peak calorific value and having an apex temperature of 105 to 135° C. and two or more endothermic peaks on the high-temperature sides of the main endothermic peak on the first DSC curve obtained when the polypropylene resin foamed bead is heated from normal temperature t…
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Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
- C08J9/122Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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Frequently asked questions
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- What does patent US9023904B2 cover?
- A polypropylene resin foamed bead from which a foamed bead molded article excelling in appearance, heat resistance and mechanical properties can be obtained at the molding temperature lower than that for conventional polypropylene resin foamed beads; and a foamed bead molded article obtained by molding the same. The polypropylene resin foamed bead is characterized by having such a crystal struc…
- Who is the assignee on this patent?
- Sasaki Hidehiro, Oikawa Masaharu, Nohara Tokunobu, and 1 more
- 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 May 05 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).