GB/T 4851-2014 PDF in English
GB/T 4851-2014 (GB/T4851-2014, GBT 4851-2014, GBT4851-2014)
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| GB/T 4851-2014 | English | 150 |
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Measurement of static shear adhesion for adhesive types
| Valid |
| GB/T 4851-1998 | English | 199 |
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Test method for holding power of pressure sensitive adhesive tapes
| Obsolete |
| GB/T 4851-1984 | English | RFQ |
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Test method for holding power of pressure sensitive adhesive tapes
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Standards related to (historical): GB/T 4851-2014
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GB/T 4851-2014: PDF in English (GBT 4851-2014) GB/T 4851-2014
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.180
Z 38
Replacing GB 4851-1998
Measurement of Static Shear Adhesion for
Adhesive Tapes
(ISO 29863.2007, Self Adhesive Tapes - Measurement of
Static Shear Adhesion, MOD)
ISSUED ON. JULY 8, 2014
IMPLEMENTED ON. DECEMBER 1, 2014
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
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 A. Measurement of Shear Adhesion to a Vertical Standard Steel
Panel ... 7
6 Method B. Measurement of Shear Adhesion to a Vertical Panel Covered
with NIST SRM 1810A Standard Fibreboard ... 12
7 Method C. Measurement of Shear Adhesion to a Vertical Panel Covered
with a Fibreboard Agreed upon by the Buyer and Seller ... 13
8 Method D. Measurement of Shear Adhesion of Filament Reinforced Tape
Applied to a Horizontal Standard Steel Panel ... 14
9 Method E. Measurement of Shear Adhesion of Filament Reinforced Tape
Applied to a Horizontal Panel Covered with NIST SRM 1810A Standard
Fibreboard ... 16
10 Method F. Measurement of Shear Adhesion of Filament Reinforced Tape
Applied to a Horizontal Panel Covered with a Fibreboard Agreed upon by the
Buyer and Seller ... 17
11 Method G. Measurement of Shear Adhesion to a Vertical Standard Steel
Panel at an Elevated Temperature after 10 min Dwell Time ... 18
Annex A (Informative) The Structural Changes between This Standard and
ISO 29863.2007 ... 21
Annex B (Informative) Technical Differences and Their Reasons between
This Standard and ISO 29863.2007 ... 22
Foreword
This Standard was drafted according to the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 4851-1998 “Test Method for Holding Power of Pressure
Sensitive Adhesive Tapes”. Compared with GB/T 4851-1998, the main technical
differences of this Standard are as follows.
-- the Standard name is changed into “Measurement of Static Shear Adhesion for
Adhesive Tapes”;
-- the reference to standard JB/T 7499-1994 “Coated Abrasives - Waterproof
Abrasive Paper” is deleted (See Chapter 2 of 1998 Edition);
-- the term of “roughness average” is added (See 3.2);
-- the types of cleaning agents are changed (See 5.2.2; 4.4.1 of 1998 Edition);
-- the cutting method of samples is added (See 5.3.1);
-- the requirements for standard test steel panel are changed (See 5.3.2; 4.2 of
1998 Edition);
-- the dimensions and mass of rollers are changed (See 5.3.3.1; 4.3.1 and 4.3.3 of
1998 Edition);
-- the requirements for test stand are changed (See 5.3.4.1; 4.1 of 1998 Edition);
-- the standard test conditions of the laboratory are changed (See 5.4.1; 6.1 of 1998
Edition);
-- the standard dimensions of test pieces are changed (See 5.4.2; Chapter 5 of 1998
Edition);
-- the cleaning method for steel panel is changed (See 5.5.2; 7.1 of 1998 Edition);
-- the number of times of rolling and applying is changed (See 5.5.3.1; 7.2 of 1998
Edition);
-- the preparation time of samples and the dwell time before testing are changed
(See 5.5.3.1; 7.4 of 1998 Edition);
-- the handling of test results is changed (See 5.6; Chapter 8 of 1998);
-- the measurement of shear adhesion of filament reinforced tape applied to a
horizontal standard steel panel is added (See Chapter 8);
-- the measurement of measurement of shear adhesion of filament reinforced tape
applied to a horizontal panel covered with NIST SRM 1810A standard fibreboard
Measurement of Static Shear Adhesion for
Adhesive Tapes
1 Scope
This Standard specifies a series of test methods for the determination of the ability of
an adhesive tape to remain adhered under a constant load applied parallel to the
surfaces of the tape and substrate.
This Standard applies to the measurement of static shear adhesion for adhesive tapes.
2 Normative References
The following documents are essential to the application of this Standard. For dated
references, only the dated editions apply to this Standard. For undated references, the
latest edition (including all amendments) applies 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
For the purpose of this Standard, the following terms and definitions and those defined
by GB/T 22396 apply to this Standard.
3.1 Static shear adhesion
It is the resistance of the pressure sensitive adhesive against shear when forces are
exerted parallel to the bonding surface.
3.2 Roughness average
It is the arithmetic average deviations of surface roughness profile, i.e. the arithmetic
average of surface roughness profile offset absolute values within the sampled length.
3.3 Test assembly
It is the assembly formed after the adhesive tape to be tested is applied to the test
-- diacetone alcohol (4-Hydroxy-4-methyl-2-pentanone), non–residual grade;
-- methanol;
-- methyl ethyl ketone;
-- acetone;
-- n-heptane;
-- isopropyl alcohol;
-- a mixture of n-heptane and a fluorinated hydrocarbon such as refrigerant
(suitable when toxicity or flammability restrictions apply).
Solvents shall be of general purpose chemical grade and held in a suitable dispensing
system.
5.3 Apparatus
5.3.1 Test piece cutter
A test piece cutter shall hold two single edge razor blades in parallel planes a precise
distance apart, to form a cutter of exact test piece width; two cutters, 12 mm and 24
mm cutting width, shall be available or appropriate alternatives which will not cause
edge damage. The precision of the razor blade separation shall be the nominal width
± 0.1 mm.
5.3.2 Stainless steel panels
These shall be perfectly flat, at least 125 mm long and 50 mm wide and at least 1,1
mm thick, stainless steel (hereinafter referred to as steel panel) type in accordance
with the 06Cr19Ni10 quality defined in GB/T 3280-2007, having a bright annealed
finish with a surface roughness (GB/T 2523-2008) of 50 nm ± 25 nm.
Panels showing stains, discoloration or many scratches are not acceptable. New
panels shall be cleaned prior to use as described in 5.5.2. Between uses the panel test
surface shall be protected from scratches and contamination and the panels shall be
stored in the conditions described in 5.4.1.
5.3.3 Roller mechanically or hand operated
5.3.3.1 A cylindrical steel roller (hereinafter referred to as roller) 85 mm ± 2.5 mm in
diameter and 45 mm ± 1.5 mm in width, covered with rubber approximately 6 mm in
thickness, having a Shore A durometer hardness of 80 ± 5. The surface shall be a true
cylinder, void of any convex or concave deviations. The mass of the roller shall be 2
kg ± 0.1 kg.
5.3.3.2 No part of the apparatus shall increase the mass of the roller during use. The
5.4.6 Apply the test pieces within 5 minutes after unwinding.
5.5 Procedure
5.5.1 Standard test conditions
Standard test conditions shall be the same as 5.4.1 for test pieces and test samples
conditioning.
5.5.2 Preparation of the panel
5.5.2.1 Dispense one of the solvents listed in 5.2.2 on to the panel, wiping it to
dryness with fresh absorbent cleaning material. Repeat for a total of three washes with
this solvent.
Final wipe shall be with methyl ethyl ketone or acetone. The panel should be allowed
to dry for at least 10 min. Panels not used within 10 h should be recleaned.
In order to obtain consistent results a new panel shall be wiped at least ten times with
final solvent before use.
NOTE. Discard plates showing stains, discoloration, or many scratches. Avoid
contacting panel surface with fingers. During storage panel should, be protected from
damage or contamination.
5.5.3 Shear adhesion
5.5.3.1 Test piece preparation
Centre the test piece at one end of the test panel and apply without added pressure to
cover an area of 12 mm ± 0.5 mm by 12 mm ± 0.5 mm, unless other dimensions are
specified. The exposed adhesive of the free area of the test piece may be masked.
To prevent damaging the test piece by the end of the panel during roll down, place
another panel of the same or slightly lesser thickness under the free masked end of
the test piece, and in contact with the end of the panel prior to roll down. Roll down the
applied test area twice, once in each lengthwise direction.
Prepare at least 3 test pieces. Individually prepare each test piece and begin test within
1 min. For tapes other than packaging tapes, other dwell times may be used but sha...
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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