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GB/T 31125-2014 (GBT31125-2014)

GB/T 31125-2014_English: PDF (GBT 31125-2014, GBT31125-2014)
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GB/T 31125-2014English160 Add to Cart 0--9 seconds. Auto-delivery Test method of adhesive tapes -- Loop tack Valid GB/T 31125-2014

BASIC DATA
Standard ID GB/T 31125-2014 (GB/T31125-2014)
Description (Translated English) Test method of adhesive tapes. Loop tack
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G38
Classification of International Standard 83.180
Word Count Estimation 9,971
Date of Issue 2014/9/3
Date of Implementation 2015/1/1
Quoted Standard GB/T 2523-2008; GB/T 3280-2007; GB/T 22396
Drafting Organization Foshan City, south-Goldman Advanced Materials Co., Ltd.
Administrative Organization National Standardization Technical Committee Adhesives
Regulation (derived from) People's Republic of China Announcement of Newly Approved National Standards No. 21 of 2014
Proposing organization China Petroleum and Chemical Industry Federation
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This Standard specifies sticky tape early test method was determined by the ring method. This Standard is applicable to the determination of tack adhesive tape can be used for quality control and research products.

Standards related to: GB/T 31125-2014

GB/T 31125-2014
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.180
G 38
Test method of adhesive tapes - Loop tack
ISSUED ON: SEPTEMBER 03, 2014
IMPLEMENTED ON: JANUARY 01, 2015
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions... 4 
4 Principles ... 4 
5 Categories ... 5 
6 Method A: Tensile testing machine method ... 5 
7 Method B: Automatic loop tack testing machine method ... 9 
Test method of adhesive tapes - Loop tack
1 Scope
This standard specifies a test method for determining the initial tack of adhesive tapes,
by the loop tack method.
This standard applies to the determination of the initial tack of adhesive tapes. It can be
used for product quality control and research.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
GB/T 2523-2008 Measuring method of surface roughness and peak count for cold-
rolled metal sheet (strip)
GB/T 3280-2007 Cold rolled stainless steel plate, sheet and strip
GB/T 22396 Terminology relating to pressure sensitive adhesive products
3 Terms and definitions
The terms and definitions as defined in GB/T 22396, as well as the following terms and
definitions, apply to this document.
3.1
Loop tack
The separation force, after contacting a loop adhesive tape material (adhesive side
outwards) with a standard test panel of a certain area, at a certain speed.
4 Principles
The loop adhesive tape is brought into contact with the test panel of the specified area,
under the action of its own weight, to measure the force to pull the adhesive tape away
from the test panel
6.3.1 Specimen ring
6.3.1.1 Size of specimen ring: Width 24 mm, circumference 175 mm.
6.3.1.2 Number of specimen rings: At least 3.
6.3.1.3 If the test sample is an unsupported adhesive tape, it is necessary to transfer the
sample to a 0.05 mm PET film, to make a specimen ring. The PET film is used here as
the support carrier, for the unsupported adhesive tape.
6.3.2 Test panel
6.3.2.1 The thickness of the stainless steel test panel is 1.5 mm ~ 2.0 mm; the width is
24 mm; the length is 100 mm.
6.3.2.2 The material of the stainless steel test panel is the 0Cr18Ni9 or 1Cr18Ni9Ti test
panel, which is specified in GB/T 3280-2007. The surface roughness (GB/T 2523-2008)
is (50 ± 25) nm. When there is permanent contamination or scars on the surface of the
test panel, replace it in time.
6.3.2.3 If PVC, ABS, PE, glass materials are used for the test panel, the material and
surface conditions shall be stated in the test report.
6.3.2.4 The stainless steel test panel, which is fixed by the fixture, shall be able to
accommodate the bonding area of 24 mm × 24 mm.
6.3.3 Cleaning agents and wiping materials
6.3.3.1 Cleaning agent
One or more of the following solvents:
- Diacetone alcohol (4-hydroxy-4-methyl-2-pentanone);
- Isopropyl alcohol;
- Methanol;
- Methyl ethyl ketone;
- Acetone;
- N-heptanone;
- Mixture off n-heptane and a fluorinated hydrocarbon (e.g.: refrigerant) (applicable
under conditions of toxicity or flammability restrictions).
Solvents are of common chemical grade AND placed in suitable containers.
6.4.8 The failure modes of the bonding between the specimen ring and the test panel
are divided into three cases: interface failure, cohesive failure, transfer failure.
6.4.9 After the test is completed, use reagents, to clean the stainless steel test panel in
the test fixture. Use dust-free cloth to cover the stainless steel test panel, to prevent the
surface from being scratched.
6.5 Test results
From the adhesive tape sample, collect the data from at least three specimen rings. The
initial viscosity shall be expressed as the average value of the maximum tensile force
of the specimen rings, in the unit of N.
6.6 Test report
The test report contains the following items:
a) Test methods;
b) Information of adhesive tape sample;
c) Reagents and cleaning methods used for cleaning stainless steel sheets;
d) Dwelling time of sample;
e) Type and thickness of adhesive tape, unit: mm;
f) Support material for the adhesive tape;
g) Release paper used for adhesive tape;
h) Dwelling time during the test of the specimen ring;
i) Average value of tensile force, unit: N;
j) Visual failure mode;
k) Non-standard test conditions.
7 Method B: Automatic loop tack testing machine method
7.1 Test devices
Figure 5 is a schematic diagram of an automatic loop tack performance testing machine.
7.4.2 Turn on the power switch.
7.4.3 Confirm that the upper gripper is at the topmost position.
7.4.4 Loosen the fixing screw. Then remove the stainless steel test panel.
7.4.5 Put the cleaned stainless steel test panel back into the test fixture. Tighten the
fixing screws.
7.4.6 Peel off the release paper, which covers the specimen.
7.4.7 Turn the specimen completely over, taking care not to crease it. Bend the specimen
into a teardrop-shaped annular specimen ring, which has a perimeter of 98 mm. The
adhesive side faces outside, as shown in Figure 6.
7.4.8 Use a 13 mm wide adhesive tape, to fasten the ends of the specimen ring together.
7.4.9 Insert the specimen ring into the upper gripper, to ensure that the specimen ring is
in the proper position, to form the upper assembly.
7.4.10 Zero the dynamometer, according to the manufacturer's instructions.
7.4.11 Long press the "Inching" button, to make the upper assembly start to move
downwards. The upper assembly stops automatically, after completing a complete cycle.
At this point, the dynamometer returns to its initial position.
7.4.12 A complete cycle begins with the upper assembly moving down; the specimen
ring contacts with the test panel, to form a bond. Then, the assembly is moved upward,
at a speed of 300 mm/min ± 10 mm/min. The dynamometer records the tensile force,
which is required to pull the specimen ring away from the test panel. At the end of a
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