Manufacturing method of filter element for dust collector
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 14, 1992
Grant Date -
N/A
app pub date -
Mar 15, 1990
filing date -
Apr 20, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of manufacturing a filter element comprises the steps of mechanically crushing two grades or more of a heat resistive synthetic resin material, the grades having different melt flow indices, respectively, the heat resistive synthetic resin material being selected from the group consisting of polysulfone, polyethersulfone and polyphenylenesulfide or containing said selected heat resistive synthetic resin as a main constituent, mixing them with one grade of them being 20 to 80 wt %, sintering the mixture in a metal mold at a melt temperature thereof plus or minus 10.degree. C. when the mixture is crystalline resin or at a temperature in a range from glass transition temperature thereof up to the glass transition temperature plus 40.degree. C. when the mixture is non-crystalline resin to form a shaped product having intercommunicating porosity, spraying surfaces of the shaped product with a mixture in liquid suspension of polytetrafluoroethylene particles, adhesive comprising thermosetting synthetic resin, and water and solidifying the suspension by heating. In order to improve the wetting of polytetrafluoroethylene with water, ethyl alcohol may be added to the suspension medium.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
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