GB/T 15330-2020 English PDF (GBT15330-2020)

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GB/T 15330-2020: Test method for water penetration rate of pressure-sensitive tapes
GB/T 15330-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.180
G 38
Replacing GB/T 15330-1994
Test method for water penetration rate of pressure-
sensitive tape
ISSUED ON: NOVEMBER 19, 2020
IMPLEMENTED ON: OCTOBER 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 5 
4 Classification ... 6 
5 Method One: Test of water penetration rate on vertical direction of pressure-
sensitive tape (WPRvertical) ... 6 
6 Method Two - Test of water penetration rate on cross section direction of
pressure-sensitive tape (WPRcross-section) ... 11 
7 Test report ... 15 
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 15330-1994 “Test method for water penetration
rate of pressure - Sensitive tapes”. Compared with GB/T 15330-1994, the main
technical differences in this Standard are as follows:
- modified application scope of the standard (see Clause 1 of this Edition,
Clause 1 of Edition 1994);
- added normative references (see Clause 2 of this Edition);
- modified terms and definitions (see 3.1, 3.2 of this Edition, Clause 2 of
Edition 1994);
- added classification of test methods (see Clause 4 of this Edition);
- added test methods, which are divided into test method for water
penetration rate on vertical direction of pressure-sensitive tape (see
Clause 5 of this Edition) and test method for water penetration rate on
cross section direction of pressure-sensitive tape (see Clause 6 of this
Edition);
- modified principle (see 5.1, 6.1 of this Edition, Clause 3 of Edition 1994);
- modified test box in instruments and equipment (see 5.2.1 of this Edition,
Clause 4 of Edition 1994);
- added ring test cover and round test cover (see 5.2.2, 6.2.2 of this Edition);
- added electronic balance requirements in instruments and equipment,
division is 0.0001g (see 5.2.6 of this Edition);
- added solvents required to use and requirements in instruments and
equipment (see 5.2.8, 6.2.8 of this Edition);
- added weights required to use and requirements in instruments and
equipment (see 5.2.9, 6.2.9 of this Edition);
- added edge sealing material in instruments and equipment (see 5.2.10 of
this Edition);
- added sampling requirements (see 5.3 of this Edition);
- added requirements for standard test environment (see 5.4 of this Edition);
Test method for water penetration rate of pressure-
sensitive tape
1 Scope
This Standard specifies test principle, instruments and equipment, preparation
of test piece, test steps and result calculation for water penetration rate of
pressure-sensitive tape.
This Standard includes test methods for water penetration rate on vertical
direction and on cross section direction of pressure-sensitive tape. The test
method for water penetration rate on vertical direction of pressure-sensitive
tape is applicable to single-sided or double-sided pressure-sensitive tape. The
test method for water penetration rate on cross section direction of pressure-
sensitive tape is applicable to double-sided pressure-sensitive tape.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB/T 4851-2014, Measurement of static shear adhesion for adhesive types
GB/T 22396, Terminology relating to pressure sensitive adhesive products
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T
22396 as well as the followings apply.
3.1 water penetration rate on vertical direction; WPRvertical
under certain conditions, the mass per unit area of water permeating the tape
perpendicular to the direction of the glue surface per unit time
NOTE: Usually it is expressed in grams per square meter day [g/(m2·d)].
3.2 water penetration rate on cross section direction; WPRcross-section
under certain conditions, the mass per unit length of water permeating the tape
in the cross-sectional direction per unit time
NOTE: Usually it is expressed in grams per square meter day [g/(m2·d)].
4 Classification
According to the different directions of the water penetration pressure-sensitive
tape position, the test method for water penetration rate of pressure-sensitive
tape is divided into test method for water penetration rate on vertical direction
of pressure-sensitive tape (WPRvertical) and test method for water penetration
rate on cross section direction of pressure-sensitive tape (WPRcross-section).
5 Method One: Test of water penetration rate on vertical
direction of pressure-sensitive tape (WPRvertical)
5.1 Principle
The pressure-sensitive tape is pasted on the test box with desiccant. Cover with
a ring test cover to form a test piece.
The test piece is immersed under a certain water pressure. Weigh the mass of
the test piece at regular intervals. When the mass gain of the test piece in a
fixed time interval reaches equilibrium, use the mass increase in unit time and
unit area of tape to express the water penetration rate on vertical direction of
the tape.
5.2 Instruments and equipment
5.2.1 Test box: made of non-moisture-absorbing material; its water vapor
transmission rate is zero (aluminum or stainless steel is recommended). The
test box has flat, smooth and rigid edges. The size is shown as Figure 1.
5.3 Sampling
Sampling is carried out in accordance with the provisions of 5.4.3 and 5.4.4 in
GB/T 4851-2014.
5.4 Standard test environment
The standard environment temperature is (23±1)°C. The relative humidity is
(50±5)%.
5.5 Number of test pieces
Each sample at least makes 3 test pieces.
5.6 Preparation of test piece
5.6.1 Use solvent to wipe clean the bonding surface of the test box and the ring
test cover. Place in the standard test environment for at least 10min.
5.6.2 Fill the test box with anhydrous calcium chloride to about 10mm away
from the opening. Ensure that calcium chloride does not contact the tape in
subsequent operations.
5.6.3 Glue the specimen to the edge of the test box. No bubbles or wrinkles
allowed. Trim the tape protruding from the edge of the test box. Then align the
ring test cover with the outer edge of the test box and glue it. It is recommended
to directly cut the tape specimen into a disc with the same diameter as the outer
edge of the test box before bonding.
5.6.4 For single-sided tape, when bonding as above, it needs to borrow other
double-sided tapes (PET double-sided pressure-sensitive tape is
recommended). Conduct auxiliary bonding of test cover and adhesive tape
without adhesive surface. It is recommended to cut the auxiliary double-sided
tape directly into the same shape as the ring test cover. Note that the auxiliary
double-sided tape is allowed to cover the water permeability test area of the
specimen.
5.6.5 Use impermeable sealing material to seal the outer circumference of the
test piece.
5.6.6 The total weight of the test piece and the total weight during the test shall
not exceed 80% of the range of the electronic balance used.
5.6.7 Put a 1000g weight on the test piece hori...