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Testing of adhesives

Adhesives are tested to ensure their quality, safety, reliability and suitability for specific applications. Testing is essential in many industries and applications, as it ensures that adhesives meet the expected requirements and standards. An essential reason for testing adhesives is to ensure their adhesion and strength. Adhesive strength is one of the most important properties of an adhesive, and testing ensures that it bonds the desired materials securely and permanently under various conditions, such as stress, temperature or humidity.

Last but not least, adhesives are tested for their long-term durability, for example by means of aging or stress tests, which show how long an adhesive retains its properties under certain conditions. This is particularly important for applications that require a high level of durability. Overall, the testing of adhesives is an important step in ensuring performance, safety and suitability for the intended applications, thus ensuring customer satisfaction and regulatory compliance.

Thomas Sulzer
Projektmanager Bauprodukte
Würzburg
t.sulzer@skz.de

Typical types of adhesives for plastics

Acrylic adhesives

They are known for their fast curing and strong adhesion – ideal for applications that require high strength.

Polyurethane adhesives

They are flexible and resistant to moisture and chemicals, making them ideal for applications that require flexibility and impact resistance.

Hot-melt adhesives

Hot-melt or melt adhesives are adhesives that are applied by heating and then cooling quickly to form a strong bond.

Epoxy resin adhesives

They offer excellent strength and chemical resistance and are often used for structural applications.

Cyanoacrylate adhesives (superglues)

They cure very quickly and provide strong adhesion to a wide variety of plastics.

Important test methods for adhesives

Tensile test

Measures the maximum tensile force that a bonded component can withstand before it breaks, and assesses the integrity of the bond

Shear strength test

Measures the strength of the adhesive bond under shear stress; crucial for applications with dominant shear forces

Peeling test

Measures the adhesive strength of an adhesive by the force required to detach a joint at the peel angle

Climate resistance test

Tests the resistance of the adhesive bond against environmental conditions such as humidity, temperature changes and UV radiation

Heat resistance test

Determines the ability of the adhesive to withstand high temperatures without losing its adhesive properties.

Chemical resistance

Tests how the adhesive reacts when it comes into contact with various chemicals that it might be exposed to during its service life

Aging test

Assesses how the adhesive bond changes over time under different conditions

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Standards

We offer the following tests:

  • DIN EN 1464
    Adhesives – Determination of the peel resistance of bonds –
    Roll peel test Tensile tests 3
  • DIN EN 1465 
    Adhesives – Determination of the tensile shear strength of lap joints Tensile tests
  • DIN EN 14680 
    Adhesives for non-pressure thermoplastic piping systems –
    specifications (here: sections 4, 5 and 6.2)
  • DIN EN 14814 
    Adhesives for pressure piping systems made of thermoplastic
    materials for fluids - specifications (here: sections 4, 5 and 6.2)
  • DIN EN 28510-1 
    Adhesives - Peeling test for flexibly/rigidly bonded samples –
    Part 1: 90° peel test
  • DIN EN ISO 11339 
    Adhesives – T-peel test for bonded joints with flexible adherends
  • DIN EN ISO 8510-2 
    Adhesives – Peel test for flex-rigid bonded samples –
    Part 2: 180° peel test
  • DIN EN ISO 9311-3
    Adhesives for thermoplastic piping systems –
    Part 3: Test method for internal pressure strength

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