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KNOWLEDGE — INNOVATION — SOLUTIONS
INSTANT ADHESIVES (CYANOACRYLATES)
INSTANT ADHESIVES (CYANOACRYLATES)

Strong, fast, and durable instant adhesives for multiple purposes.

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HOT MELT ADHESIVES
HOT MELT ADHESIVES

Fast, cost-effective, versatile, and reliable hot-melt adhesive bonds.

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UV CURING ADHESIVES
UV CURING ADHESIVES

Light-cured adhesives for strength and longer lifetimes.

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STRUCTURAL EPOXY AND INDUSTRIAL ADHESIVE
STRUCTURAL EPOXY AND INDUSTRIAL ADHESIVE

Maximum Tensile and Shear Strength in non-solvent and solvent-based technologies.

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INDUSTRIAL TAPES
INDUSTRIAL TAPES

Single or double-sided VHA tapes, from removable to permanent strength.

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EPOXIES, ELECTRICAL POTTING COMPOUND
EPOXIES, ELECTRICAL POTTING COMPOUND

UL approved products in a variety of ratios and viscosities.

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SEALANTS, ANAEROBIC THREADLOCKER, RETAINING COMPOUNDS
SEALANTS, ANAEROBIC THREADLOCKER, RETAINING COMPOUNDS

Tough, Resilient, Flexible, High temperature resistant, MIL-spec and ASTM specifications available.

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DISPENSING EQUIPMENT
DISPENSING EQUIPMENT

Soft-squeeze bottles, UV Curing equipment, robots and semi-automatic adhesive dispensing systems.

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2019-08-21
Understanding Creep in Structural Epoxies

Understanding Creep in Structural Epoxies

 

There is no doubting the utility of adhesives and structural epoxy in our daily lives. On an everyday basis, people implicitly trust the structural integrity of adhesive-bound structures – which makes sense, given that the past few decades have seen enormous advancements in materials and bonding technology. But maintaining people’s implicit trust in adhesively bound structures that we rely on also depends on a myriad of engineering considerations. An important part of determining the structural integrity of adhesive-bound surfaces over time is known as creep.

 

Creep is the tendency for an adhesive bond to suffer permanent dimensional changes when under stress of carrying a structural load.

 

How Does Creep Occur?

 

In materials science, creep is described as what occurs when a solid material deforms permanently as a result of persistent mechanical stress. Creep can even occur in instances where the load of stress is lower than the strength of the material. Creep is typically a concern for engineers or metallurgists when assessing structural components that function under various types of stresses. In some instances, the effects of creep deform the structure so much that it is unable to perform its original function.

 

Factors Affecting Creep

 

A number of factors can affect the rate of creep. The rate of deformation will depend on the function of the material’s properties, exposure time length, exposure temperature, and the characteristics of the applied structural load. The phenomenon tends to occur in materials that are subjected to higher temperatures over long periods of time, with it increasing the closer the temperature is to the material’s melting point.

 

Creep in Structural Epoxy and Adhesives

 

Determining the reliability of bonded surfaces to mechanical stresses due to structural loads, are imperative to assessing defect engineering. As such, there are specific methods that exist to understand resistance to creep in structural epoxy bound adhesive applications. Factors to take into consideration include substrate type, the geometry of the adhesive-bound assembly, frequency and magnitude of the stress, duration of loading, and the temperature cycling rates. It is essential for high performing adhesion systems to be designed to resist deformation and damages attributed to creep.

 


Informative read - creep is definitely an important consideration when bonding surfaces via structural epoxy
Posted by: Ronald | August 21, 2019, 1:04 pm
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