Information on the most widely used ASTM standards within the materials testing industry
Model: UT2046BA-10, ISO 4587, ISO 13007,
Adhesive pull-off tester is a testing device used to test the pull-off strength of adhesives. It works by applying adhesive to the surfaces of two different materials and then applying a vertical pulling force to test the bonding strength. This test can determine the adhesive's sticking ability and durability, which is very important for evaluating its applications in industrial and everyday life. The adhesive pull-off tester can be used on various materials such as metal, plastic, and wood, and it features simplicity, ease of use, accuracy, and reliability. It is an essential testing device for both adhesive manufacturers and users.
Standard:
ISO 4587: Adhesives — Determination of tensile lap-shear strength of rigid-to-rigid bonded assemblies
ISO 13007-1:2014 Ceramic tiles — Grouts and adhesives Part 1: Terms, definitions and specifications for adhesives
EN 1384: Adhesives for tiles. Determination of tensile adhesion strength for cementitious adhesives
General Introduction
Adhesive pull-off tester is a testing device used to test the pull-off strength of adhesives. It works by applying adhesive to the surfaces of two different materials and then applying a vertical pulling force to test the bonding strength. This test can determine the adhesive's sticking ability and durability, which is very important for evaluating its applications in industrial and everyday life. The adhesive pull-off tester can be used on various materials such as metal, plastic, and wood, and it features simplicity, ease of use, accuracy, and reliability. It is an essential testing device for both adhesive manufacturers and users.
Building materials Adhesives Bond Strength Tensile Testing Machine is mainly used for tensile and bonding strength testing of dry-mix mortar, insulation materials, ceramic wall and floor tile adhesives, multi-layer architectural coatings, and exterior wall putty. The testing machine has an elegant appearance and fine workmanship. It uses a servo control system, enabling uniform loading with high efficiency and good stability. It features touchscreen control and a user-friendly interface. The instrument is equipped with travel limit and overload protection for both positive and negative forces. It has adjustable testing speed, high load measurement accuracy, and convenient operation. It is applicable in factories, construction project quality inspection stations, construction companies, product quality inspection institutes, research universities, and on-site road and bridge projects, for production testing, quality inspection, and research and development purposes.
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| Pull off test fixture of Building materials Adhesives Bond Strength Tensile Test | |
Instructions for Use:
Using the adhesive pull-off tester requires the following steps:
1. Confirm that the dimensions and shape of the test sample are correct and secure it in the test fixture of the testing machine.
2. Adjust the parameters of the testing machine to match the characteristics of the test sample, such as tensile speed, test parameters, and sample size.
3. Start the test and monitor the tensile force and displacement data.
4. When the test sample reaches its limit, the tester will automatically stop and record the maximum tensile force value.
5. Additionally, for shear strength testing, place the sample in the shear fixture and follow the same steps for testing.
Main features
1. Touchscreen control with a user-friendly human-machine interface.
2. Servo-driven for continuous uniform displacement loading and uniform force loading.
3. Equipped with dual sensor capability, standard configuration includes one sensor.
4. Fast lifting and one-key automatic return when no load is applied.
5. Stroke limit and overload protection for both positive and negative forces.
6. Quick positioning in the X-Y directions, especially suitable for testing multiple samples on a single test board.
7. Equipped with single-point fixtures for convenient single-sample testing.
8. Articulated T-shaped head for easy positioning and handling of test specimens.
9. Movable platen to prevent bending and deformation of test materials. (Non-standard configuration)
| Problems | Reason and treatment |
| There is no display after powering on | Controller power cord, insurance, switch, etc |
| Start without action | Host power supply, insurance, switch, control cable |
| After loading, the test force is not displayed | Whether the sensor is well connected |
| The force value is stable | Check the system ground wire |
| Long alarm | Sensor over-range loading or sensor wire breaking |
ISO 4587: Adhesives — Determination of tensile lap-shear strength of rigid-to-rigid bonded assemblies
ISO 13007-1:2014 Ceramic tiles — Grouts and adhesives Part 1: Terms, definitions and specifications for adhesives
EN 1384: Adhesives for tiles. Determination of tensile adhesion strength for cementitious adhesives
When using the adhesive pull-off tester, the following points should be observed:
1. Ensure that the laboratory environment has a stable temperature, and the testing machine is not affected by other vibrations.
2. The size and shape of the test sample must comply with the standard specifications, and the test fixture and sample should fit tightly together.
3. Clean the fixtures and test samples before and after testing to ensure accurate results, and pay attention to safety during the operation.
4. Before use, the instrument must be calibrated to ensure testing accuracy.
Main Technical Specification
| Maximum test force | 10KN |
| Load resolution | 0.1N |
| Effective measuring range | 1%~100%F·S |
| Load measurement accuracy | within ±0.5% of the indicated value |
| Pulling method | various control modes available, including force control and displacement control |
| Pulling speed range | 0.1 mm - 300 mm/min |
| Specimen width range | 70 - 500 mm |
| Maximum specimen thickness | 50 mm |
| Maximum travel of the test head | 100 mm |
| Dimension | 1400X 600X 1570mm |
| Weight | 120Kg |
| Standard Power | 220, 50HZ, 1 phase |
Test sample details
The specimen is a standard "single lap tensile shear" specimen, and all parameters are critical to the repeatability and comparability of the test results.
Specimen structure (single lap)
One end of the two adhesive objects (specimens) is overlapped together at a certain overlapping length to form a joint.
On the testing machine, tensile loads are applied to the unbonded ends to subjected the lap area to shear stress.
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Building materials Adhesives Bond Strength Tensile Testing Machine Sample information:
| Parameters | requirements | Tolerance | Description |
| Overlap Length | 12.5 mm | ±0.25 mm | The core stress area of the joint directly affects the shear stress distribution |
| Adherend Thickness | 1.6 mm (Metal) | ±0.1 mm | The common value of rigid materials, non-metals are not mandatory in the standard, but they need to be consistent |
| Adherend Width | 25 mm | ±0.2 mm | Stable shear area (25 mm×12.5 mm=312.5 mm²) |
| The total length of the object being adhered to | 100 mm | ±0.5 mm | Adapt to the fixture to avoid interference during loading |
| Bond Line Thickness | 0.2 mm (typical) | ±0.05 mm | Controlled by calibrated steel wires / glass beads, too thick is prone to cohesion failure |
| Alignment of the object being adhesive | No offset | The lap edge is misaligned≤ 0.1 mm | Prevent stress concentration caused by eccentric force |
Materials and requirements for the adhesive (specimen).
Material: Must be a rigid material. The standard recommends and most commonly used metals, in particular:
Ordinary carbon steel (such as Q235): most commonly used, low cost, easy surface treatment.
Aluminum alloy (e.g. LY12CZ): Used in aviation, lightweight fields.
Stainless steel, other alloys, or non-metallic rigid materials (e.g., specific plastics, composites) may also be used, but this must be clearly stated in the report.
o Surface Treatment (Crucial):
The surface to be adhered to needs to be standardized to eliminate interference with the results of the surface condition.
Specific steps are specified in the standard, which usually include: solvent degreasing (e.g., acetone, methyl ethyl ketone wiping), → mechanical sanding (e.g., sandpaper sanding), → secondary solvent cleaning→ drying.
After treatment, bonding should be carried out within the specified time (such as within 1 hour) to prevent re-contamination or oxidation of the surface.
Number of specimens
o Minimum number of samples: not less than 5.
o Best Practice: Typically prepare and test 5-10 valid specimens to ensure the reliability of statistical results.
o Invalid specimen: If the failure mode is abnormal (such as too thick adhesive layer, obvious lack of glue, obvious bending of the specimen, slippage of the clamping area, etc.), the data should be invalidated and a new specimen should be supplemented.
Sample preparation process (requirements)
o Cleaning and handling: Strictly treat the adhesive surface according to the above methods.
o Adhesive Coating:
Mix well according to the specified ratio (two-component glue).
Apply the adhesive evenly over the entire lap surface of a specimen.
Controlling the thickness of the adhesive layer is both difficult and key. The standard method is usually through positioning devices (e.g., thickness gaskets, specialized fixtures) or applying slight pressure after lapping and using overflow to ensure uniform adhesive layers. The final adhesive layer thickness should be between 0.05-0.20mm and recorded.
o Assembly and curing:
Immediately stack another specimen to form the specified lap length.
Use special specimen preparation fixtures to ensure accurate alignment and positioning.
Cure according to the curing conditions (pressure, time, temperature) specified by the adhesive manufacturer. The curing pressure should ensure that the adhesive layer is uniform, but not too large will cause the adhesive to be completely extruded.
o Cleanup: After curing, carefully remove any spilled gliomas to avoid stress on the bonding area.
Result calculation and reporting requirements:
• Tensile Shear Strength Calculation:
Among them:
o τ= tensile shear strength in megapascals (MPa)
o F= Maximum load at specimen failure in Newtons (N)
o b= Specimen lap surface width in millimeters (mm)
o l= Specimen lap length in millimeters (mm)
• The report must include:
Tensile shear strength value, arithmetic mean, standard deviation of each specimen.
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