Method for producing foamed particle, and foamed particle
By using a mixture of two linear low-density polyethylene resins with specific properties, the method addresses low in-mold formability in existing technologies, enabling high-quality foamed particle molded bodies with a wide density range and reduced environmental impact.
TWI934100BActive Publication Date: 2026-08-01JSP CORP
2 Cites 0 Cited by
Patent Information
- Application Number
- TW112108393
- Authority / Receiving Office
- TW · TW
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2022-05-31
- Filing Date
- 2023-03-08
- Publication Date
- 2026-08-01
- Estimated Expiration
- 2043-03-07
AI Technical Summary
Technical Problem
Existing methods for manufacturing polyethylene resin foamed particles result in low in-mold formability, making it difficult to produce high-quality foamed particle molded bodies across a wide density range.
Method used
A method involving the foaming of resin particles using a mixture of at least two specific linear low-density polyethylene resins, with defined melt flow rates, biomass content, and heat of fusion, to create foamed particles with a crystalline structure and controlled density range.
Benefits of technology
The method enables the production of high-quality polyethylene resin foamed particle molded bodies with excellent in-mold formability and a wide density range, reducing the use of fossil resources and carbon emissions.
✦ Generated by Eureka AI based on patent content.
Abstract
This invention relates to a method for manufacturing expanded beads with a bulk density of 10 to 240 kg / m³, produced by foaming resin particles made from a mixture of at least two linear low-density polyethylene resins as the base resin. The mixture comprises polyethylene A and polyethylene B, with a biomass of 50% or more and a melt flow rate (MFR) of 0.1 to 3 g / 10 min. The difference between the MFR of A and the MFR of B is 0 to 2 g / 10 min, the mass ratio of A to B is 5 / 95 to 95 / 5, the biomass of the mixture is 5% or more, and the mixture has a crystalline structure that exhibits the melting peak inherent to linear low-density polyethylene in a DSC curve and a high-temperature peak on the high-temperature side, with a heat of fusion of 10 to 50 J / g at the high-temperature peak.
Need to check novelty before this filing date? Find Prior Art