AT250661B - Process for the production of biaxially stretched sheets or foils from powdered polytetrafluoroethylene - Google Patents

Process for the production of biaxially stretched sheets or foils from powdered polytetrafluoroethylene

Info

Publication number
AT250661B
AT250661B AT26463A AT26463A AT250661B AT 250661 B AT250661 B AT 250661B AT 26463 A AT26463 A AT 26463A AT 26463 A AT26463 A AT 26463A AT 250661 B AT250661 B AT 250661B
Authority
AT
Austria
Prior art keywords
foils
production
biaxially stretched
stretched sheets
powdered polytetrafluoroethylene
Prior art date
Application number
AT26463A
Other languages
German (de)
Inventor
Otto Zwoboda
Original Assignee
Otto Zwoboda
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Otto Zwoboda filed Critical Otto Zwoboda
Priority to AT26463A priority Critical patent/AT250661B/en
Application granted granted Critical
Publication of AT250661B publication Critical patent/AT250661B/en

Links

Landscapes

  • Filtering Materials (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Description

  

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  Verfahren zur Herstellung von biaxial gestreckten Platten oder Folien aus pulverförmigem Polytetrafluoräthylen 
 EMI1.1 
 

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 fach gefalteteFell wird jetzt erneut, jedoch ohne Gewebe und senkrecht zur ursprünglichen Walkrichtung im Kalander gewalkt. 



   Nach dem zweiten Walken legt man das Fell hälftig zusammen und walkt wieder senkrecht zur vorhergehenden Walkrichtung. Beim 4. und 5. Walkvorgang wird das Fell nicht mehr gefaltet, sondern unter der schon beschriebenen Änderung der Walkrichtung auf die gewünschte Enddicke gebracht.



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  Process for the production of biaxially stretched sheets or foils from powdered polytetrafluoroethylene
 EMI1.1
 

 <Desc / Clms Page number 2>

 folded fur is now drummed again, but without fabric and perpendicular to the original flexing direction in the calender.



   After the second fulling, you fold the skin in half and then cycle again perpendicular to the previous direction. In the 4th and 5th fulling process, the fur is no longer folded, but brought to the desired final thickness by changing the fulling direction already described.

Claims (1)

PATENTANSPRUCH : Verfahren zur Herstellung von biaxial gestreckten Platten oder Folien aus pulverförmigem Polytetrafluoräthylen (Teflon) durch Dispergieren des Pulvers in einem Gleitmittel, Absaugen des überschüssigen Gleitmittels und Walkens des verbleibenden Filterkuchens in zwei Richtungen, dadurch gekennzeichnet, dass der Filterkuchen beidseitig mit einem Gewebe abgedeckt und anschliessend in an sich bekannter Weise in einem Kalander biaxial gewalkt wird. PATENT CLAIM: Process for the production of biaxially stretched sheets or foils from powdered polytetrafluoroethylene (Teflon) by dispersing the powder in a lubricant, suctioning off the excess lubricant and flexing the remaining filter cake in two directions, characterized in that the filter cake is covered on both sides with a fabric and then in is biaxially drummed in a calender in a known manner.
AT26463A 1963-01-14 1963-01-14 Process for the production of biaxially stretched sheets or foils from powdered polytetrafluoroethylene AT250661B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT26463A AT250661B (en) 1963-01-14 1963-01-14 Process for the production of biaxially stretched sheets or foils from powdered polytetrafluoroethylene

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT26463A AT250661B (en) 1963-01-14 1963-01-14 Process for the production of biaxially stretched sheets or foils from powdered polytetrafluoroethylene

Publications (1)

Publication Number Publication Date
AT250661B true AT250661B (en) 1966-11-25

Family

ID=3485910

Family Applications (1)

Application Number Title Priority Date Filing Date
AT26463A AT250661B (en) 1963-01-14 1963-01-14 Process for the production of biaxially stretched sheets or foils from powdered polytetrafluoroethylene

Country Status (1)

Country Link
AT (1) AT250661B (en)

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