C-PAK PTE LTD,
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Description :
C-PAK TYPE CP44 cover tape is a transparent
polyester film with static dissipative properties on both sides and heat
sealable over a wide range of temperatures, thus making it immensely suitable
for carrier tapes made of polystyrene.
The adhesive system is
specially developed for tight range in seal strength, as an addition to its
stable seal strength.
Construction: Polyester film (PET) +
Olefine layer + Sealant Layer
GENERAL
PROPERTIES ( Preliminary data )
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METHOD |
VALUE |
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Tensile Strength |
ASTM D-882 |
7.3 kg/ mm2 |
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Elongation |
ASTM D-882 |
90 % |
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Luminous Transmittance |
ASTM D-1003 |
>80 % |
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Haze |
ASTM D-1003 |
<35% |
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Surface Resistivity ( Both sides S.R. measurement: |
ASTM D-257 |
£ 1011 Ohms/sq |
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Peel Strength Limit ( see
recommended sealing parameters) |
20 to 80g |
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Base Material |
POLYESTER |
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Dimensions: |
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Width (mm) |
5.3, 5.5, 9.2, 13.1, 13.3, 21.0, 21.3, 25.5, 37.5, 49.5 ( Other widths are available) |
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Width Tolerance |
For width |
(5.3, 9.2, 13.3, 21.0, 21.3, 25.5, 37.5, 49.5) |
± 0.1 mm |
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Thickness |
0.060± 0.005 |
0.060mm |
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Length |
300 m or 500 m |
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Standard Roll
It is wound on a 3”
plastic core in all standard widths. Splice free rolls are available in 300m,
500m lengths.
Color : Transparent Film * ( Slight variations which do not
affect product performance are normal)
Shelf Life
Shelf Life
Best if used within 24
months. Store at controlled room temperature environment, 25 ±
12°C and relative humidity of 40 - 60 %. Avoid excessive heat.
Recommended sealing
temperature as follows (see Notes):
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Number of sealing overlaps |
Sealing Temperature °C |
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3x |
165 to 200 |
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4x |
155 to 190 |
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6x |
150 to 185 |
Other Recommended Sealing Parameters (see Notes):
Sealing Shoe Width x length: 0.018” x 1.9” (0.457x 48mm)
Sealing time : 0.3 sec
Pressure: 30 psi
Sealing Mode: Reciprocating
Peel Test Speed during peeling: 300mm ± 10mm
per minute
Angle of pull test: Between
165 to 180 degrees
Notes:
1. The recommended sealing parameters are based on embossed Cpak’s carrier tape material made of Polystyrene. The sealing parameters for other compatible carrier tape materials are available upon request.
2.
Positioning the
seal bead away from the slit edge of cover tape will keep adhesive from being
forced out from the edge. Seal bead should remain away from the edge of tape
to minimize potential breakage of the film. Use of a narrow seal width
(0.015” – 0.020”) gives more control over the position in
which the seal is placed relative to the carrier tape pocket, sprocket holes
and slit edge of the cover tape.