Highly Clear Double-faced Tape HSV/SSV series

Highly Clear Double-faced Tape
HSV/SSV series

These series are highly transparent tapes, whose structure consists only of adhesive layers and no base material.High-performance acrylic adhesives are used in the adhesive layers, making it possible for each of the series to demonstrate its own characteristics.

Features

■HSV series
  • Hard to form air bubbles when attached to various kinds of adherends such as resin plates, glass and metal. especially at the time when exposed to heat or humidity.
  • Hard to fog up when attached to high water vapor permeable adherends such as resin plates, especially at the time when exposed to heat or humidity.
  • UV irradiation is not needed after the tape is bonded to an adherend.
  • High optical properties when used in objects which need long-term reliability.
■SSV series
  • Great flexibility and less display unevevess("MURA") on the lighting LCD. Suitable for use in direct bonding techniques.
  • The tapes' adhesive layer has a thichness of 175μm, making it possible to fill a gap of over 25μm.
  • UV radiation is not needed after the tape is bonded to an adherend.
  • High optical properties when used in objects which need long-term reliability.

Applications

Bonding a cover panel to an ITO glass (or film)
Bonding a touch panel to a LCD

General physical properties

    HSV SSV
Item Unit HSV01 SSVK1-175
Tape thickness μm 250 175
Adhesive strength Glass N/25mm 23.3 20 or more
PC 22.7
PL 16.5
Light transmission 92.0 91.3
HAZE 0.1 0.3

*All of the adhesive strength in the table was measured based on ASTM D-3330.
*All the data in the table are for reference, not guaranteed values.

HSV Series

■Merit1:Air-bubble-proof test (by using  resin plates)
Test Result
Conventional product Bubble
Bubble
Sekisui's developed product
HSV
No Bubble
No Bubble
Test condition

■Test sample: An 8-inch plastic cover panel and a sheet of glass which were bonded together with the test tape.
The plastic cover panel consists of a single-layered polycarbonate.
Tape thickness :175μm

■The appearance of the test sample was checked after the sample was placed at a temperature of 85℃ and at a humidity of 85% for 1000 hours.

■Merit2:Anti-fog test (by using resin plates)

■Anti-fog test

Composition: Mitsubishi Gas Chemical-made PC plate, MR58/ Tape/ITO film of 125μm
Test conditions: HAZE was measured at a temperature of 85℃ and a humidity of 85% three times - immediately, 4 hours and 120 hours after the removal-.

■As for a conventional tape, the HAZE rate was measured after it was taken out of the oven heated to 85℃ at a humidity of 85%. The test results show that the HAZE rate of the tape increased with time, which means it easily fogs up. (The HAZE rate was highest 4 hours after the tape was taken out of the oven.)
■As for HSV01, the HAZE rate remained below 1% four hours after it was taken out of the oven, which means it does not fog up.

SSV Series

■Merit1:LCD Display unevenness ('MURA') Test
After "MURA" test
Conventional product MURA appeared along the edge of the LCD
MURA appeared along the edge of the LCD
Our developed product
SSVK1
No MURA
No MURA
Test condition

■Test sample: An 8-inch cover glass and a LCD which were bonded together with the test tape.
Tape thickness :175μm

■The test sample was placed in a 60-degree oven for 1 hour.

■After that, it was taken out of the oven, and then put on a lighted LCD device to check if there was any MURA.

*The above figures are only measurements, their values are not guaranteed.

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