Strength of Peeling Adhesion of Tape: Influence of

Temperature, Time, Thickness and Ultraviolet Light

B Y Li

1,*

and Y Y Huang

Institμte of Applied Chemistry, 106 Zhineng Road, International Education Park,

Suzhou Vocational University, Suzhou, China 215104

Research institute of silk applied technology, Suzhou Vocational University,

Suzhou, China 215104

Corresponding author and e-mail: B Y Li, lby@jssvc.edu.cn

Abstract. In this paper,,peel force tests of Pressure sensitive adhesive (PSA) were carried out

for selected PSA at different times, temperature, thickness, etc.. We use the method provided

by ASTM D3330 to test its peel strength. The effects of temperature, time, substrate and UV

irradiation on the peeling force tapes were observed. With the increase of time the peel

strength of the tapes increase range of different substrates is

Al(31%)~SUS(31%)>ABS(20%)>Glass(12%)>PC(11%)>PMMA(5%). In the range of 0-

100°C he peeling force shows a significant upward trend for 24 hours. Prolonged time or UV

curing increases the peel strength of the tape, and the thicker tape strengthens more.

1. Introduction

Pressure sensitive adhesive (PSA) is a pressure-sensitive adhesive in the bonding process. It can be

adhered to the surface of the adherend by using pressure means such as finger abdomen pressure in

the process of use [1]. We understand under “adhesion” the relatively weak,so-called van der Waals

interaction. Adhesive forces can be easily seen in a contact of between two smoothsolid bodys which

are widely used in omestic,industrial and medical applications [2-4]. In general, pressure sensitive

adhesive tapes for certain purposes must provide 180° peel strength data. Standard test methods for

180° peel strength are included in each standard system.

In this paper, we use the method provided by ASTM D3330 [5] to test them. The effects of

temperature, time, substrate and UV irradiation on the peeling force tapes were observed.

2. Experimental materials and equipments

2.1. Experimental materials

Double-sided tapes (PSA) (provided by Dow Corning, USA), substrates: ASTM SUS, Al,

Polycarbonate (PC), Acrylonitrile Butadiene Styrene plastic (ABS), Polymethylmethacrylate

(PMMA), Glass(Jinan languan,CHN).

670

Li, B. and Huang, Y.

Strength of Peeling Adhesion of Tape: Inﬂuence of Temperature, Time, Thickness and Ultraviolet Light.

In Proceedings of the International Workshop on Materials, Chemistry and Engineering (IWMCE 2018), pages 670-673

ISBN: 978-989-758-346-9

2.2. Experimental equipments

Zwick Universal testing machine (BT1-FR2.5TH.140 Fnom 2.5kN), Weiss simulationsanlagen

messtechnik Oven (WK-340/40 22604900), Roller press (HOWE Elektrotechnik RDD20050),

UVACUBE2000 (Hoenle, Germany).

2.3. Experimental methods

The peel adhesion of pressure-sensitive adhesives was tested using a Zwick-Roell machine according

to the international standard ASTM D3330 procedures. A sample of PSA-coated material (20mm

wide and about 150mm long) was bonded to a horizontal target substrate surface consisting of a clean

steel test plate providing at least 15 cm

firm contact. A 4 kg hard rubber roller was used to apply the

strip. The free end of the coated strip was doubled back nearly touching itself, so that the angle of

removal would be 180

◦

. The steel test plate was clamped in the jaws of a tensile testing machine,

which was capable of moving the plate away from the scale at a constant rate of 30mm/min. The

scale reading in Newton [N] was recorded as the tape was peeled from the steel surface. The data

were reported as the average of the range of numbers observed during the test. The given result was

an arithmetic average of three specimens [6].

The influence of temperature on PSA measurements was carried out after 24 hours at 0,

20,40,70,100 °C, respectively . The influence of time on PSA measurements was carried out after 15

seconds and 14 days. The influence of UV irradiation on PSA measurements was carried out after

UV irradiation for 30 minutes in UV irradiator.

3. Results and discussion

3.1. Peel Adhesion of PSA on substrates after bonding for different time

From the test data (Table 1 and Table 2), it can be seen that the peel strength of the tape on different

sheets is different. The initial viscous strength order obtained by the 15 seconds test method is

PMMA>PC>Glass>SUS>ABS>Al. And after 14 days, the order of sticky strength obtained is PC>

SUS > PMMA > Glass > Al> ABS. The inconsistency between them may be due to the different

mechanism of initial stickiness and stickiness. The initial viscosity is affected by the activity of the

molecular segment, while the stickiness is determined by the cohesion [1].The peel strength of the

tape increases with the increase of time. The order of increase is Al (31%)~SUS(31%) >ABS

(20%)>Glass (12%)>PC (11%)>PMMA (5%).This may be because the wetting effect between the

substrates and the tape becomes better over time.The surface energy of the substrate has a positive

relationship with the peel strength of the tape, the greater the surface energy, the better the surface

wetting and the greater the peel strength [7].

Table 1. Peel force of PSA on substrates after bonding for different times.

Substrates SUS Al PC

Surface Energy(J) 64 40 48

Time 15s 14d 15s 14d 15s 14d

Surface os cs os cs os cs os cs os cs os cs

Average value (N/cm) 9.58 9.93 12.70 12.90 8.16 9.41 11.50 11.50 11.15 12.10 13.10 12.70

Failure mode A F A F A F A F A F A F A F A F A F A F A F A F

Strength of Peeling Adhesion of Tape: Inﬂuence of Temperature, Time, Thickness and Ultraviolet Light

671

Table 2. Peel force of PSA on substrates after bonding for different times.

Substrates ABS PMMA Glass

Surface Ener

(J) 38 40

Time 15s 14

15s

14d 15s 14d

Surface os cs os cs os cs

os cs os cs os cs

Avera

e value (N/cm)

8.83 8.62 10.70 10.20 11.48 12.11

12.80 12.10 11.01 11.68 12.50 12.70

Failure mode

A F A F A F A F A F A F

Note: Adhension Failμre(A F)

3.2. Peel Adhesion of PSA on substrates after bonding for different temperatures

Table 3. Peel force of PSA on substrates after bonding for different temperatures.

Time Initial 24 hours

Temperatμre(℃)

RT 0 RT 40 60 70

85 100

T/S(-40-85℃)

Average (N/cm) 7.50 7.80 8.40 9.40 9.80 9.80

10.30 10.40 9.70

Increase (%) 0 4 12 25 31 31

37 38 29

Failμre mode A F A F A F A F A F A F

A F A F A F

The experimental results (Table 3) show that compared with the initial peel force at room

temperature, the peeling force after one day of soaking at all test temperatures shows a significant

upward trend, which can be concluded that long soaking time helps to improve the adhesive

performance. The peel strength peaked around 85 °C, and the cross-linking reaction was almost

complete. When the temperature continues to rise, the bond strength does not increase much.

Under the thermal shock temperature test, the samples were tested at a low temperature of -40 °C

and a high temperature cycle of 85 °C. The peel force of the sample was still very good, achieving an

average peel force of 9.68 N/cm. The tape has good adhesive properties and still shows good

performance under severe temperature conditions.

3.3. Peel Adhesion of PSA on substrates after bonding for different tape thickness

The data (Table 4) show that as the thickness of the tape increases, the peel strength also increases.

The increase within 15 seconds is relatively small, with an average increase from 10-12.30

N/cm(23%) , which after 14 days, the increase rate increased from 12.7-17.1 N/cm (35%) on

average.. From 15 seconds to 14 days, the tape thickness increased from 23 μm to 34 μm, and the

increase in strength increased from 26% to 41%. When the thickness increases again, the strength

does not continue to increase. In general, the film can be plastically deformed. The thicker film, the

greater the energy consumed for plastic deformation, the greater the peel strength.

Table 4. Peel force of PSA on substrates after bonding for different thickness.

Substrates Glass

Thickness(

m) 23 34

Time 15s 14

15s

14d 15s 14d

Surface os cs os cs os cs

os cs os cs os cs

Avera

e value (N/cm)

9.80 10.30 12.50 12.90 11.00 12.00

16.50 16.00 11.90 12.70 17.60 16.50

Increase (%)

0 26 0

41 0 39

Fail

re mode

A F A F A F A F A F A F

IWMCE 2018 - International Workshop on Materials, Chemistry and Engineering

672

3.4. Peel Adhesion of PSA on substrates after bonding for UV irradiation

Table 5. Peel force of PSA on PET after bonding for UV irradiation(1000 mJ).

Substrates PET

Thickness(μm) 50 100 200

Status Uncure

Cure

Uncure

Cure

Uncure

Cure

Average (N/cm) 7.90 9.40 8.50 9.90 10.20 10.90

Increase( %) 19 16 7

Utraviolet (UV) curing is the process of polymerization of unsaturated organic compounds initiated

by UV light of appropriate wavelengths and light intensity, resulting in the formation of crosslinked

structural macromolecules[8]. The data (Table 5) showed that the adhesive tapes of different

thicknesses increased after irradiation with ultraviolet light, and as the thickness decreased, the

peeling strength increased from 7% to 19%. The thinner the thickness, the greater the increase in

viscosity after UV light irradiation.

4. Conclusions

In this work, peel force tests were carried out for selected PSA at different times, temperature,

thickness, etc.With the increase of time the peel strength of the tapes increase, which the increase

range of different substrates is

Al(31%)~SUS(31%)>ABS(20%)> Glass(12%)>PC(11%)>PMMA(5%). The peeling force after one

day of soaking at 0-100 ℃ shows a significant upward trend. As the thickness of the tape increases,

the peel strength also increases.The thinner the thickness, the greater the increase in viscosity after

UV light irradiation.

Acknowledgements

The financial support from the Technology Plan Project Foundation of Suzhou Science and

Technology Bureau (Grants SS201742).

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