C-PAK PTE LTD, SINGAPORE                                             TECHNICAL INFORMATION

15 Sept 08                                                                                                                      CP43 -0

                          

C-PAK  TYPE  CP43  COVER  TAPE

                                                                                               

                                                     

Description :

 

C-PAK TYPE CP43 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) + Sealant Layer

                       

GENERAL  PROPERTIES ( Preliminary data )

 

 

METHOD

VALUE

 

 

 Tensile Strength

 

 

JIS-K-7127

 

 6.0 kg/ mm2

 

 

 Elongation

 

 

 JIS-K-7127

 

 120%

 

 Luminous Transmittance

 

 

 JIS-K-7105

 

 90 %

 

 

 

 Haze

 

 

 JIS-K-7105

 

 50 %

 

 

  Surface Resistivity

 ( Both sides S.R. measurement:

 

 

 JIS-K-6911

 

 £ 1011 Ohms/sq

 

 

 Peel Strength Limit ( see recommended sealing parameters)

 

 

 20 to 80g

 

 

 Base Material

 

 

 POLYESTER

 

 

 Dimensions:

 

 

 Width (mm)

 

5.3, 5.5,9.2, 13.3, 21.0, 21.3, 25.5, 37.5, 49.5

( Other widths are available)

 

 

 Width Tolerance

 

For width

 

(5.3, 9.2, 13.3, 21.0, 21.3, 25.5, 37.5, 49.5)

 

 

± 0.1 mm

 

 

 Thickness

 

 

0.055± 0.008

­­0.055mm

 

 

 Length

 

 

300 m or 500 m

 

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 12 months. Store at controlled room temperature environment, 25 ± 15°C and relative

humidity of 40 - 70 %. Avoid excessive heat.

 

 

Recommended sealing temperature as follows (see Notes):

Number of sealing overlaps

Sealing Temperature °C

3x

150 to 180

4x

145 to 165

6x

140 to 160

 

 

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.