Engineering & Design Plastics
Distributors of plastic to industry
84 High Street Cherry Hinton Cambridge CB1 9HZ UK
Telephone +44 (0) 1223 249 431 Fax +44 (0) 1223 411 803
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Engineering & Design Plastics |
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Distributors of plastic to industry |
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84 High Street Cherry Hinton Cambridge CB1 9HZ UK |
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Telephone +44 (0) 1223 249 431 Fax +44 (0) 1223 411 803 |
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Carp Brand Tufnol
Cotton fabric based Laminate
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Resin: |
Phenolic |
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Reinforcement: |
Cotton fabric (fine weave) |
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Description: |
A top quality grade for mechanical and electromechanical applications. Made from a premium quality fine weave cotton fabric which has been specially treated to enhance the machineability and other properties. Strong, good wear resistance. Excellent machining qualities. Low water absorption with good dimensional stability. Very good electrical properties for this class of material. Resistance to high impact is slightly less than the coarser weave grades. |
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Typical Uses: |
Used for a wide variety of components where premium quality is required. It is often chosen for components with intricate features and where accuracy and a fine machined finish is needed. Typical components include fine toothed gears, cams, geneva wheels, seal retaining rings, actuating arms, insulating sleeves and bushes, components for use at cryogenic temperatures, insulation for low and medium voltages and a wide range of other precision machined parts. |
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Types Available: |
Natural colour is available in all sections. Graphite impregnated is available in all sections and black is available in sheet only, both subject to minimum order quantities. |
Shapes & Sizes
Sheet
Thickness: 0.4mm to 88.9mm
Sheet size: approx 1220mm x 1220mm, minimum size 1168mm x 1168mm
Round rod
Diameter: 3.2mm to 152.4mm
Length: approx 1200mm for diameter 3.2mm to 120.6mm
Length: approx 584mm for diameter 104.8mm to 152.4mm
Round Tube
Inside diameter: 3.2mm to 203.2mm
Outside diameter: 6.3mm to 228.6mm
Wall thickness must be less than the inside diameter.
Length: approx 584mm for o.d. up to 15.1mm
Length: approx 1200mm for o.d. 9.5mm to 120.6mm
Length: approx 584mm for o.d. 101.6mm to 228.6mm
Rectangular Bar
Sizes 4.8mm x 4.8mm to 76.2mm x 88.9mm
Length: approx 1200mm
Rectangular Tube
Internal size 4.8mm x 4.8mm to 69.8mm x 69.8mm
Length approx: 584mm for size 9.5mm x 9.5mm or smaller, 1200mm for sizes larger
Channel
Cut from rectangular tube. Please deduct 3.2mm from relevant internal dimension to allow for tool cut.
Angle
Outside size: 6.3mm x 9.5mm to 149.2mm x 149.2mm
Wall Thickness: 1.6mm to 9.5mm
Length approx: 1200mm
Hexagonal Bar
Across flats: 11.3mm to 28.0mm
Length approx: 1200mm
Carp Brand Tufnol cotton fabric based Laminate
SPECIFICATIONS
BRITISH STANDARDS
Sheet: BS2572 Type F1
Round Rod: BS6128 Part 2 Type PF CC 21 & 22
Rectangular Bar: BS6128 Part 4 Type PF CC 42 & 42
Hexagonal Bar: BS6128 Part 6 Type PF CC 61 & 62
Round Tube: BS6128 Part 9 Type PF CC 91
Rectangular Tube: BS6128 Part 13 Type PF CC131
NEMA*
Sheet: Nema LI-1-1983 Type LE
MIL*
Sheet: MIL-I-24768
DIN*
Round Rod & Tube: DIN7735 TYPE Hgw 2088 & 2089
*Certification to these standards is subject to special enquiry. Standard quality testing to British Standards.
PHYSICAL PROPERTIES OF CARP BRAND
SHEET
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PROPERTY |
TYPICAL RESULT |
UNITS |
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Cross Breaking strength |
150 |
Mpa |
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Impact Strength, notched, Charpy |
8.6 |
KJ/m2 |
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Compressive strength, flatwise |
350 |
Mpa |
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Compressive strength, edgewise |
200 |
MPa |
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Resistance to flatwise compression |
1.4 |
% |
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Shear strength, flatwise |
105 |
MPa |
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Water absorption 1.6mm thick |
55 |
mg |
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Water absorption 3mm thick |
70 |
mg |
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Water absorption 6mm thick |
90 |
Mg |
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Water absorption 12mm thick |
125 |
mg |
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Electrical Strength, flatwise in oil at 90oC 1.6mm thick |
7.2 |
MV/m |
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Electrical Strength, flatwise in oil at 90oC 3mm thick |
4.9 |
MV/m |
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Electrical Strength, flatwise in oil at 90oC 6mm thick |
4.0 |
MV/m |
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Electrical Strength, edgewise in oil at 90oC |
23 |
KV |
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Insulation resistance after immersion in water |
7x109 |
ohms |
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Relative density |
1.36 |
- |
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Maximum working temperature ** continuous |
120 |
o C |
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Maximum working temperature ** intermittent |
130 |
o C |
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Thermal classification |
Class E |
- |
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Thermal conductivity through laminae |
0.37 |
W/(mK) |
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Thermal expansion in plane of laminae |
1.9 |
X10-5/K |
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Specific heat |
1.5 |
KJ/(kgK) |
Test methods as BS2572, where applicable.
** Users of highly stressed components at temperatures approaching the maximum are recommended to see seek further more specific technical advice from Tufnol Ltd.
ROUND TUBES
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PROPERTY |
TYPICAL RESULT |
UNITS |
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Axial compressive strength |
180 |
Mpa |
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Cohesion between layers |
140 |
Mpa |
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Water absorption |
2.4 |
Mg/cm2 |
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Insulation resistance after immersion in water |
5x108 |
ohms |
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Relative density |
1.35 |
- |
Test methods as BS 6128.
ROUND RODS
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PROPERTY |
TYPICAL RESULT |
UNITS |
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Flexural strength |
170 |
Mpa |
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Water absorption |
2.5 |
Mg/cm2 |
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Insulation resistance after immersion in water |
5x108 |
Ohms |
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Axial electric strength in oil at 90oC |
15 |
kV |
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Relative density |
1.35 |
- |
Test methods as BS 6128.
All the information given is believed to be correct, but completeness and accuracy are not guaranteed. The user shall be responsible for determining the suitability of products for the intended use. TUFNOL is a registered trade mark.