Polystyrene foam sheet useful for forming deep drawn articles, a process to produce those articles, and the deep drawn articles
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 8, 1994
Grant Date -
N/A
app pub date -
Jun 22, 1993
filing date -
Jun 22, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A polystyrene foam sheet comprising a polystyrene resin which contains 1 to 15 wt % of a rubber component having a majority of particle sizes less than about 0.45 microns has been found to be superior for forming deep drawn articles. Optionally one or two films may be extrusion coated or laminated to the foam sheet prior to thermoforming. Also disclosed is a method for thermoforming the foam sheet. Preheat the sheet, clamp the sheet between the matched male and female mold members, move the members into final position while applying a vacuum through both members to both sides of the foamed sheet and then chill formed foam to set a final shape.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully