Double coated tapes for LCD modules
With both light blocking and reflecting effects for fixing of liquid crystal displays or backlight units.
Products Category Double coated tapes
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Comparison

Product name

 G7580HBK

Suitable use

 For LCD modules

Application

 Computers / AV / Cellular phones

Features
  • Environmentally friendly non-solvent manufacturing method.
  • Black face for light shielding effects, white face for light reflecting effects.
  • Low total tape thickness, effective in the reduction of product thickness.
  • Halogen free.
  • G7560HBK, a thinner type of G7580HBK, also available.
 
non-solvent manufacturing method
   
   

Structure

Specifications
Product name G7580HBK
Main component Acrylic base
Carrier 20 µm PET
Color White side/black side
Adhesive thickness(µm) About 85
Release film thickness(µm) About 50 for white side/about 38 for black side
Bonding strength(N/20mm) 15
St'd size (width & length) 500mm x 100m

*G7580HBK: With both side release film.
*Patent No.: 3690298
*Adhesiveness: Measured value in a peeling test for 90° peeling strength against PC.

Application Example
Application Example
For fixing of LCD modules and backlight units.
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Technical Data

1.Bonding strength (180° peeling) 180°Peeling strength test
Test Piece Condition
Tape width: 20mm
Bonding condition: One stroke with 2-kg roller
Measuring condition: 23°C±5°C 60%±20%RH
Peel speed: 300mm/min
Backing material: 25µm PET
  • [ Left at RT for one hour before measurement ]
Results
Substrate (N/20mm)
SUS 15.7
2.Bonding strength (90° peeling) 90°Peeling strength test
Test Piece Condition
Tape width: 20mm
Bonding condition: One stroke with 2-kg roller
Measuring condition: 23°C±5°C 60%±20%RH
Peel speed: 300mm/min
Backing material: 25µm PET
  • [ Left at RT for one hour before measurement ]
Results
Substrate (N/20mm)
SUS 17.7
PC 15.1
HC treated polarizer 5.9
3.Holding Power Holding power test
Test Piece Condition
Bonding area: 25mm x 25mm
Bonding condition: One stroke with 2-kg roller
Measurement
temperature:		 80°C
  • [ Measurement of creep length (mm) after one hour application of 1-kg load ]
Results
Substrate (mm)
SUS 0.6
PC 0.5
HC treated polarizer 0.5
4.Impact force resistance  
Test Piece Condition
Substrate: ABS (50 mm square)/ Acrylic plate (15 mm square)
Bonding area: 15mm x 15mm
Test atmosphere: 10°C
Impact force: Dropping 300g weight onto the ABS face from a height of 15cm
  • [ Left at RT for one day after adhesion, and then under each test condition for 30 minutes before measurement]
  • [ Check whether the acrylic plate has been dropped]
Results
Impact force resistance(n=5)
No dropped nor peeled portion found
5.Curved surface bending  
Test Piece Condition
Substrate: ABS PLATE Thickness 2.0 x 25 x 200mm
Aluminum plate Thickness 0.5 x 20 x 150mm
Bonding condition: One stroke with 2-kg roller
Measuring condition: 50°C / 80°C
  • [ Left at RT for 24 hours before measurement]
  • [ Measurement of lifting height (mm) at ends at predetermined times]
Results
Curved surface bending(1hr) No lift.
6.VT Strength  
Test Piece Condition
Substrate1: HC treated polarizer(Black)
Substrate2: PC plate(White)
Bonding area: 2.5cm x 2.5cm
Peel speed: 10m/min
  • [ Left at RT for one day before measurement]
Results
VT Strength(N/6.25cm²) 149
7.Optical characteristics  
Test Piece Condition
Wavelength: 550nm
Reflectance: Measured on white face
Light resistance: Measured on black face
  • Reflectance/light resistance (measured with spectrophotometer).
    *Reference values for reflectance and light resistance.
Results
Radiation surface Test item
Reflectance Light resistance
White About 75.2% -
Black - Greater than 99.9 %

<Comparison of light blocking ability>
A light (source: halogen lamp, 12 V, 100 W) is shone on a white face and how the light is transmitted from the other black face is observed visually.
Our traditional product  
G7580HBK

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caution The technical data in this document, which was acquired based on reliable tests, does not guarantee full performance as per the documentation in any instance. Users assume total responsibility and risk for use of this product for any purpose under any usage conditions.