C-PAK PTE LTD ,SINGAPORE                                           TECHNICAL INFORMATION

08 July 2010                                                                                                                      25-6

                       

C-PAK TYPE CP25 COVER TAPE

 

C-PAK TYPE CP25 cover tape is 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.

 

 GENERAL PROPERTIES (Typical value)

 

                                                                                    METHOD                               VALUE

 

Tensile Strength                                               JIS-K-7127                              >5.0 kg/ mm2

                                                                                                                       

Elongation                                                       JIS-K-7127                              >75 %

                                                                                                           

Surface Resistivity (PET side)*                         JIS-K-6911                              ≤9.9x1011 ohms/ sq   

                                                                                                            

Surface Resistivity (Sealant side)*                     JIS-K-6911                              ≤9.9x109 ohms/ sq   
(*measurement environment: temperature 23±3°C, Humidity: 60±10% RH)

 

Adhesion to carrier tape                                   EIA 481                                   20 – 80 grams

 

Transparency                                                 JIS-K-7105                               87.8  %

 

Haze                                                              JIS-K-7105                              28%

 

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

 

Width Tolerance                                                                                            ± 0.1 mm

           

Thickness                                                                                                     0.041 to 0.055 mm

 

Length                                                                                                          300 m or 500 m

 

Base Material                                                                                                   POLYESTER

 

Standard Roll

CP25 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 18 months. Store at controlled room temperature environment, 25 ± 15°C and relative humidity of 40 - 70 %.

 

Recommended sealing temperature to achieve peel strength limits of 20g to 80gms (See Notes):

Number of sealing overlaps

Sealing Temperature °C

3x

180 to 200

4x

170 to 195

6x

165 to 185

 

 

 

 

Other Recommended Sealing Parameters:

Sealing Shoe Width x length:  0.018” x 1.9” (0.457 x 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.