Easy-to-Dismantle/Easy-to-Remove Foam Tape

Evaluation method

Two PC panels are stuck together with a 5 mm wide piece of tape, and the tape is removed after the form layer splits and disintegrates.

Results

Tape	Scraps from cutting		Rework		Photo of sample
	Results	Reason	Results	Reason
SEKISUI’s PE product	(none)	Strong foam base with a closed-cell structure	(No tape remains)	Strong reworked layer
Competitor A’s PU product	(Scraps produced)	Weak foam base with an open-cell structure	(No tape remains)	Strong reworked layer
Competitor B’s PU product	(Scraps produced)	Weak foam base with an open-cell structure	(Tape remains)	Weak reworked layer

Simulated situation for evaluation

This evaluation is based on the assumption that the flexible foam tape was used to install a TV set obliquely.

Evaluation method

• Stick glass or SUS objects together with a clamp over the tape.
• Hang a 1 kg weight from it and measure how long it takes to fall.

Measurement temperature	60°C 90%RH
Tape size	25mm × 25mm
Pressure application conditions	5kg*10sec
Curing conditions	23°C 50%RH*24hr
Tilt angle	45°
Test duration	Up to 500h

Results

Evaluation method

• SUS objects are stuck together with a 25mm×12.5mm piece of tape and left for 24 hours to cure, and then the shear strength is measured.
• They are left in 85°C, 85% RH conditions and the shear strength is measured at intervals until 1,250 hours have passed.
• With the shear strength at 0 hours as the baseline (100%), the relative strength (%) at each measurement time point is calculated.

Adherend	SUS/SUS
Tape size	25mm × 12.5mm
Pressure application conditions	5kg × 10sec
Curing conditions	2After 24h at 23°C, 50%RH, store at 85°C, 85%RH
Test temperature	Remove from the oven to cool and then measure at 23°C, 50%RH
Test speed	12.7ｍｍ/min

Results

Simulated situation for evaluation

Tested assuming use on a curved screen with the housing as the PC adherend.

Evaluation method

• Two pieces of PC board are taped together, clamped, and left for 24 hours.
• The PC boards are bent and checked for lifting and peeling of the tape.

Evaluation part number	XLS9D
Adherend 1	PC board 2mm × 25mm × 150mm
Adherend 2	PC board 1mm × 25mm × 200mm
Tape size	3mm × 150mm
Pressure application conditions	2 kg roller × 1 time in both directions (10 mm/sec)
Curing conditions	23℃ 50%RH*24hr
Test temperature	60℃ 90%RH

*With a chord length of 165 mm and arc length of 200 mm, R (radius) = 95 mm (actual R is 95 mmv due to PC rigidity<)

Results

Evaluation time	Lifting distance
After 1 hour	0mm
After7days (168 hours)	0mm