Molding material having superior buffering character
US4026841A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1975 |
| Grant date | May 31, 1977 |
| Priority date | — |
| Expiry date | Jul 21, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2323/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A molding material having superior buffering character, moldability and dimensional stability obtained by incorporating a copolymer composed predominantly of polyethylene or ethylene with an inorganic filler blend comprising sand with an average particle size of 100 to 500 microns and calcium sulfite, and foaming the resulting composition. A molded product having a lustrous and beautiful superficial coating can be obtained by pressing the aforementioned foamed body while it is still hot against a smooth cool solid surface and cooling the foamed body down to a temperature below its softening point. Further, the aforementioned molding material is useful for packings, mattresses and lightweight construction materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.