C-PAK PTE LTD, SINGAPORE                                             TECHNICAL INFORMATION

1 Mar 2010                                                                                                 99-1

                          

C-PAK TYPE CP99 COVER TAPE

 

 

Description :

 

C-PAK TYPE  CP99 cover tape is a transparent and tinted 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:      0.0254 mm Polyester film (Polyethylene Terephthalate)

                                0.0254 mm Heat Activated Adhesive

GENERAL  PROPERTIES ( Typical value)

 

 

METHOD

VALUE

 

 

 Tensile Strength

 

 

 ASTM D-882A

 

 7.75 kg/ mm2

 

 

 Elongation

 

 

 ASTM D-882

 

 120 - 140%

 

 Luminous Transmittance

 

 

 ASTM D1003-95

 

 93 %

 

 

 

 Haze

 

 

 ASTM D-1003

 

 27 %

 

 

  Surface Resistivity

 ( Both sides S.R. measurement:

  1.0E+9  to  9.9E+10 Ohms per sq )

 

 

 ASTM D-257

 

 £ 1011 Ohms/sq

 

 

  Static Decay 5kv

 

 

 EIA541

 

 Less than 0.1 sec

 

 

 Peel Strength Limit ( see recommended sealing parameters)

 

 

 55 +/- 25g

 

 

 Base Material

 

 

 POLYESTER

 

 

 Dimensions:

 

 

 

 Width (mm)

 

5.3, 9.2, 13.3, 21.0, 21.3, 25.5, 37.5, 49.5, 65.5 and 81.5

( 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

 

 

For width

 

 

(65.5 and 81.5)

 

± 0.15 mm

 

 

 Thickness

 

 

( 0.050 ± 0.010 )

­­

0.040 to 0.060 mm

 

 

 Length

 

 

300 m or 500 m

 

Standard Roll

CP99 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. 

 

Color :  Transparent Pink Film *

( Slight variations which do not affect product performance are normal)

 

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

145 to 160

4x

135 to 155

6x

130 to 150

 

 

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 0.45mm (18 mils) – 0.50 (20 mils),  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.