Foam molding resin and method for manufacturing foam molded article
US-2018215885-A1 · Aug 2, 2018 · US
Resin for foam molding, foam molded article, and method for producing foam molded article
US11434342B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11434342-B2 |
| Application number | US-201816640076-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 23, 2018 |
| Priority date | Aug 30, 2017 |
| Publication date | Sep 6, 2022 |
| Grant date | Sep 6, 2022 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
According to the present invention, provided is a foam molding resin containing low-density polyethylene, wherein a strain hardening degree of the low-density polyethylene is equal to or more than 0.40.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing a foam molded article by blow molding or vacuum molding, comprising steps of: extruding, from a foam extruder, a melt-kneaded resin obtained by melt-kneading a foam molding resin and a foaming agent in the foam extruder to form a foamed parison; and molding the foamed parison by blow molding or vacuum molding to obtain the foam molded article, wherein the foam molding resin contains low-density polyethylene, a strain hardening degree of the low-density polyethylene is equal to or more than 0.40, and melt tension of the low-density polyethylene is equal to or more than 250 mN. 2. The method of claim 1 , wherein the foam molding resin further contains high-density polyethylene. 3. The method of claim 2 , wherein a mass ratio of the low-density polyethylene and the high-density polyethylene is 2:8 to 8:2. 4. The method of claim 1 , wherein shear viscosity of the low-density polyethylene is equal to or more than 450 Pa·s. 5. A method for producing a foam molded article by blow molding or vacuum molding, comprising steps of: extruding, from a foam extruder, a melt-kneaded resin obtained by melt-kneading a foam molding resin and a foaming agent in the foam extruder to form a foamed parison; and molding the foamed parison by blow molding or vacuum molding to obtain the foam molded article, wherein the foam molding resin contains low-density polyethylene, a strain hardening degree of the low-density polyethylene is equal to or more than 0.40, and shear viscosity of the low-density polyethylene is equal to or more than 450 Pa·s. 6. The method of claim 5 , wherein the foam molding resin further contains high-density polyethylene. 7. The method of claim 6 , wherein a mass ratio of the low-density polyethylene and the high-density polyethylene is 2:8 to 8:2. 8. The method of claim 5 , wherein melt tension of the low-density polyethylene is equal to or more than 250 mN.
Assignees
Inventors
Classifications
characterised by the die · CPC title
characterised by the material · CPC title
Extrusion blow-moulding · CPC title
containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title
HDPE, i.e. high density polyethylene · CPC title
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Frequently asked questions
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- What does patent US11434342B2 cover?
- According to the present invention, provided is a foam molding resin containing low-density polyethylene, wherein a strain hardening degree of the low-density polyethylene is equal to or more than 0.40.
- Who is the assignee on this patent?
- Kyoraku Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08L23/06. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 06 2022 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).