C-PAK PTE LTD, SINGAPORE                                                                                                                                                                                                   TECHNICAL INFORMATION

14 Jan 08                                                                                                                                                                                                                                24-4

                        C-PAK TYPE CP24 COVER TAPE

 

C-PAK TYPE  CP24  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 different materials of carrier tape.

 

The adhesive system is specially developed for tight range in seal strength, as an addition to its stable seal strength.

 

Construction: 0.0254 mm Polyester film (polyethylene terephthalate)

                       0.0254 mm Heat Activated Adhesive

 

GENERAL  PROPERTIES ( Typical value)

                                                                        METHOD                              VALUE

 

Tensile  Strength                                            ASTM D-882                          7.7  kg/ mm2

                                   

Elongation                                                      ASTM D-882                          120  %                                    

Luminous Transmittance                               ASTM D1003-95                    91  %

 

Haze                                                                ASTM D1003-95                    50  %

 

Surface Resistivity ( both sides)                    ASTM D-257                          £ 1011 Ohms/sq.     

 

Peel Strength Limit ( see recommended sealing parameters)                      55+/-25g

 

Width  (mm)                                       5.3,      9.2,      13.3,    21.0,    25.5,    37.5,    49.5    

 

Width Tolerance                                                                                             ± 0.1 mm

 

Thickness                                                                                                        ­­0.048 to 0.058  mm

 

Length                                                                                                             300M

 

Base Material                                                                                                 Polyester

 

Standard Roll

CP24 is wound on a 3” plastic core in all standard widths. Splice free rolls are available in 300M lengths. Custom widths and lengths are available upon request. 

 

Shelf Life

Best if used within 24 months. Store at controlled room temperature environment 19°C to 40°C ( 66°F to 104°F) and relative humidity of 50+/-30 %. Avoid excessive heat.

 

Recommended sealing temperature as follows ( see Notes):

Number of sealing overlaps

Sealing Temperature °C

3x

160 to 170

4x

155 to 170

6x

150 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. 

 

Note:

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.