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GB/T 2790-1995 English PDF
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GB/T 2790: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 2790-1995 | English | 70 |
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Adhesives, 180-degree peel strength test method for a flexible-bonded-to-rigid test specimen assembly
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| GB 2790-1981 | English | 199 |
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Adhesives--The method for determination of<180-degree peel strength (metal to metal)
| Obsolete |
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GB/T 2790-1995: Adhesives, 180-degree peel strength test method for a flexible-bonded-to-rigid test specimen assembly
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT2790-1995
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
Replacing GB 2790-81
Adhesives, 180 Peel Strength Test Method for a
Flexible-bonded-to-rigid Test Specimen Assembly
APPROVED ON. DECEMBER 20, 1995
Implemented on. AUGUST 1, 1996
Issued by. The Quality and Technology Supervision Bureau of the
People’s Republic of China.
Table of Contents
1 Main Content and Scope of Application... 3
2 Normative References... 3
3 Principle... 3
4 Devices... 3
5 Test Specimens... 4
6 Conditioning and Test Environment... 6
7 Test Procedures... 6
8 Processing of Test Result... 7
9 Test Report... 8
Additional information... 9
Adhesives, 180 Peel Strength Test Method for a
Flexible-bonded-to-rigid Test Specimen Assembly
This Standard equivalently adopts ISO 8510-2.1990 Adhesives - Peel Test for a
Flexible-bonded-to-rigid Test Specimen Assembly - Part 2.180 Degree Peel.
1 Main Content and Scope of Application
This Standard stipulates the devices, test specimen preparation, test procedures and
result processing of 180 peel test of adhesive test specimens bonded by flexible
materials and rigid materials.
This Standard is applicable to the determination of adhesives’ resistance against 180
peeling under the stipulated conditions. The adhesive test specimens are constituted
of two bonded materials (flexible materials and rigid materials).
2 Normative References
GB 2918 Plastics - Standard Atmospheres for Conditioning and Testing
3 Principle
Use two pieces of bonded materials and adhesives to prepare adhesive test
specimens.
4 Devices
4.1 Tensile Test Device
The device shall have an appropriate range of load; the chuck shall be able to separate
and impose tensile force at a constant rate. This device shall be equipped with a
measurement system and indicating/recording system of force.
4.2 Chuck
One of the chucks shall be able to firmly clamp the rigid bonded piece (see 5.1.1); and
make the adhesive surface parallel to the imposed force. The other chuck (see Figure
1) shall be able to fixate the flexible bonded piece (see 5.1.2); this chuck is self-
calibrated.
5 Test Specimens
5.1 Bonded Materials
The thickness of bonded materials should be able to endure the estimated tensile force.
The dimensions of bonded materials shall be accurately measured and written into test
report.
5.1.1 Rigid bonded test specimens
The width of rigid bonded test specimens shall be. 25.0 mm ± 0.5 mm, unless it is
otherwise stipulated1; the length shall be. above 200 mm, long strips.
5.1.2 Flexible bonded test specimens
Flexible bonded test specimens shall be able to bend 180 without manifesting any
severe and irrevocable deformation. Unless it is otherwise stipulated, the length of
flexible bonded test specimens shall be not less than 350 mm.
The width is.
5.2 Preparation of Test Specimens
In accordance with the instructions of adhesives, conduct surface treatment2 of test
specimens and apply adhesives. Place a coating of gum on the whole width of each
piece of bonded test specimen; the length of the coated gum shall be 150 mm.
5.3 Quantity of Test Specimens
The quantity of each batch No. of test specimens shall be not less than 5.
6 Conditioning and Test Environment
Test specimens shall be conditioned and tested under the standard environment
stipulated in GB 2918.The time of conditioning of test specimens shall be not less than
2 h3.
7 Test Procedures
Bend the unbonded side of flexible bonded test specimen by 180; firmly clamp the
rigid bonded test specimen on a fixated chuck; firmly clamp the flexible bonded test
specimen on the other chuck.
8 Processing of Test Result
In terms of each sample, through the relationship curve of peel force and peel length,
determine the average peel force, expressed in (N). Peel length, which is used in the
calculation of peel force, shall be at least 100 mm, but it shall not include the initial 25
mm. An estimated contour line (see Figure 2) may be marked, or, area measurement
method may be adopted to obtain the average peel force. If a more accurate result is
requested, other appropriate methods may also be adopted.
9 Test Report
Test report includes the following parts.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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