fine cut granular ptfe - gfl
TRANSCRIPT
Fine cut Granular PTFE
Updated on: 27.02.2020 Page 1 of 8
PROCESSING GUIDE
®
®
® ® ®
®
INTRODUCTION
BASICS
PROPERTIES
50
Properties
%
%
UnitTest Method
450
610
350
630
4
350
640
460
50
655
Fine cut Granular PTFE
Updated on: 27.02.2020 Page 2 of 8
Figure 1- Schematic diagram of preforming and sintering sequence with PTFE
1. Compression
2. Cohesive strength
3. Elastic recovery
4. Delayed recovery
5. Thermal expansion
6. Coalescence (major void elimination)
7. Fusion
8. Minor void elimination
9. Crystallization
10.Thermal contraction
Pressure
Updated on: 27.02.2020 Page 3 of 8
Fine cut Granular PTFE
Figure 2- Transition of PTFE Molecule
®
®
PREFORMING
Below 19°C
13 CF2 per 180°
Below 19°C
15 CF2 per 180°
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Fine cut Granular PTFE
610
640 & 655
630
610
630 & 655
640
INOFLON® Fine cut Grades
45
40
35
30
25
20
15
10
Preforming Pressure (MPa)
10 15 20 25 30
® Fine cut granular PTFE grades
INOFLON® Fine cut Grades
450
400
350
300
250
200
150
100
50
0
Preforming Pressure (MPa)
10 15 20 25 30
Updated on: 27.02.2020 Page 5 of 8
Fine cut Granular PTFE
SINTERING
Table 2- Recommended preforming pressure
610
630
640
655
INOFLON® Grades Recommended preforming pressure (MPa)
Updated on: 27.02.2020 Page 6 of 8
Fine cut Granular PTFE® Fine cut granular PTFE, Solid billets (Ref. - Table 3)
Typical Sintering Cycle
Table 3-Typical sintering cycle for INOFLON® Fine cut granular PTFE, Solid billets:
450
400
350
300
250
200
150
100
50
0
300300
375 375
330
290
2525
Sintering Steps
1 2 3 4 5 6 7
A
B
C
F
50
100
150
Cycle
Sintering Steps
Diameter (mm)
1
3
4
4
2
1
4
3
1
3
4
3
4
5
6
5
1
5
6
6
1
5
6
7
3
4
4
Time Duration (Hours)
Time (hrs)
13
33
40
Total
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Fine cut Granular PTFE® Fine cut granular PTFE, Annular billets (Ref. - Table 4)
Table 4 -Typical sintering cycle for INOFLON® Fine cut granular PTFE, Annular billets:
A
B
C
F
50
100
150
Cycle
Sintering Steps
Wall Thickness (mm)
1
3
2
1
3
4
6
10
3
1
3
4
4
1
1
5
1
3
6
3
6
11
14
7
11
8
1
3
9
4
6
10
10
3
Time Duration (Hours)
Time (hrs)
54
Total
Typical Sintering Cycle
450
400
350
300
250
200
150
100
50
0
300300
340
340 330
290
2525
Sintering Steps
1 2 3 4 5 6 7 8 9 10
330
375 375
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The information provided in the bulletin is furnished at no cost to the recipient and is based on information and technical data that Gujarat Fluorochemicals Limited believes is correct and sound. Those who
any loss or damage caused directly or indirectly due to use of any information provided in this bulletin. Nothing contained herein can be taken or construed as a grant of license by GFL to operate under or a recommendation to infringe any patents.NOTE warning: Do not use any of INOFLON® PTFE resins in medical devices that are designed for permanent implantation in the human body. For other medical uses, prior permission of GFL may be sought.
SALES AND TECHNICAL SUPPORT
Updated on: 27.02.2020 Page 8 of 8
HANDLING AND STORAGE
SAFTEY PRECAUTIONS
Fine cut Granular PTFE