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For superb adherence to a wide variety of substrates including many metals, plastics, rubbers, ceramics and glass, Polymer System EP31 was developed by Master Bond Inc. This two-part system features extraordinary adhesion with a lap shear strength exceeding 4,600 psi, a peel strength surpassing 40 pli, a tensile modulus of more than 410,000 psi and a flexural strength of over 13,000 psi. With an excellent resistance to many chemicals including water, oil and fuels, it is also an outstanding electrical insulator. EP31 has a versatile cure schedule and can cure at room temperature or more quickly at elevated temperatures. Other notable characteristics include a Shore D Hardness of greater than 75 and low shrinkage upon cure. It is easily processed with a convenient 3:1 mix ratio by weight and has a service temperature range of -60°F to 250°F. Available in both black and optically clear, EP31 is sold in half pints, pints, quarts, 1 gallon and 5 gallon containers. It is also available in a convenient non-drip version called EP31ND.
Related Glossary Terms
- ceramics
ceramics
Cutting tool materials based on aluminum oxide and silicon nitride. Ceramic tools can withstand higher cutting speeds than cemented carbide tools when machining hardened steels, cast irons and high-temperature alloys.
- hardness
hardness
Hardness is a measure of the resistance of a material to surface indentation or abrasion. There is no absolute scale for hardness. In order to express hardness quantitatively, each type of test has its own scale, which defines hardness. Indentation hardness obtained through static methods is measured by Brinell, Rockwell, Vickers and Knoop tests. Hardness without indentation is measured by a dynamic method, known as the Scleroscope test.
- shear strength
shear strength
Stress required to produce fracture in the plane of cross section, the conditions of loading being such that the directions of force and of resistance are parallel and opposite although their paths are offset a specified minimum amount. The maximum load divided by the original cross-sectional area of a section separated by shear.
