Foamed sheet containing inorganic particles and method for producing same
By dispersing inorganic particles containing alkaline earth metal carbonate in a polyester resin, the foamed sheet achieves reduced rigidity, improved thermoformability, and uniformity, addressing the challenges of high rigidity and breakage in traditional polyester foamed sheets.
JP7649647B2Active Publication Date: 2025-03-21HUVIS CORP
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Patent Information
- Application Number
- JP2020526376
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2019-04-25
- Filing Date
- 2019-09-03
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2039-09-03
AI Technical Summary
Technical Problem
Foamed sheets containing polyester resin have high rigidity, making it difficult to impart a desired shape through thermoforming and are prone to breaking.
Method used
A foamed sheet is developed by dispersing inorganic particles containing alkaline earth metal carbonate in a polyester resin, with a residual alkaline earth metal element content of 0.2 to 2% by weight per unit area, and satisfying a specific formula to achieve a thickness deviation rate of 10% or less.
Benefits of technology
The resulting foamed sheet exhibits reduced cell size and density, a uniform surface, reduced corrugation, and excellent thermoformability, with a thickness deviation of 7-22% and a constant thickness.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention relates to a polyester foam sheet in which inorganic particles containing alkaline earth metal carbonate are dispersed in a polyester resin, wherein the content of residual alkaline earth metal elements per unit area (1 m width x 1 m length) of the foam sheet is in the range of 0.2 to 2.0 wt % and the foam sheet has a consistent thickness with a thickness deviation of 7 to 22%.
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