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ASTM D5420, ASTM D4226 and ASTM D2794 now offered at Micom Laboratories

Micom Laboratories is pleased to announce that it now offers the ASTM D5420, ASTM D4226 and ASTM D2794 tests as part of its offering for polymer testing and coating testing. Although these three methods are for different materials, they are essentially the same test method and can be interchanged in a transparent way.

In terms of definitions, an impact is a high force or shock applied over a short time period when two or more objects strike each other, it is proportionate to the relative velocity of the colliding materials. The purpose of impact testing is to study the ability of a material to absorb energy upon a collision. This energy is a factor of the toughness, impact strength, fracture resistance or impact resistance of the material. As impact takes place, the stress concentration exceeds the strength of the polymer. Failure then occurs in the form of cracks.  The impact resistance properties are crucial in the selection of materials for specific applications and these three test methods are useful in the determination of the impact mechanical properties of the test specimens.

Upon testing, the specimens are placed on a holding fixture with the geometry determined by the type of test and the specific material. A known weight falls through a guiding system and impacts a striker sitting on top of an anvil supported specimen. The weight is dropped from various heights until failure occurs. Following the collision, an instantaneous transfer of energy occurs between the hemispheric striker and the specimen. There are different impactor geometries, each ones having different diameter.

Nearly all materials my benefit from impact testing since impact resistance governs the life durability of materials such as those used for protecting workers. Furthermore, quantifying the impact resistance is a great advantage in product liability and safety.  It is however important to keep in mind that the impact resistance of materials depends on the temperature and other environmental conditions.

Micom offers polymer testing services for a wide selection of material and products. For more information about the ASTM D2794, ASTM D4226 and ASTM D5420 tests, do not hesitate to get in touch with our specialists.

Micom Laboratories is a third party industrial material testing laboratory accredited by the Standards Council of Canada, CGSB, ISTA and many other organizations.


All of the information and opinions contained in this blog are made with the information, and the understanding that we have reviewed at the time of publishing.  However, despite our efforts, we do not offer any guarantee of their accuracy, thoroughness of our investigation or validity. The author of this blog is not liable for any inaccuracies or any losses or damages that may result from the use of the information or data contained herein. This blog has not been reviewed or verified for its accuracy by any peer group associates prior to publication.


Michel Comtois

Michel Comtois

Michel Comtois is an accomplished founder and CEO of Micom Laboratories Inc., an ISO/IEC 17025 (2017) A2LA-accredited independent laboratory specializing in product and material testing services. Before establishing Micom Laboratories in 1999, Michel, who also holds a Master’s degree in Physical Chemistry, gained extensive experience over a 14-year tenure managing departments spanning physical chemistry, physics, mechanical and material testing in research and contract laboratories. This exposure granted him a profound understanding of the intricacies of development and material testing processes.

In addition to his practical experience, Michel has played influential roles on various voluntary technical committees. He notably, served as the chairperson for CAN/CGSB 44.227 and the Head of the Canadian Delegation for ISO TC 136. He also contributed to the following technical committees: CAN/CGSB 44.229, CAN/CGSB 44.232, ANSI/BIFMA X5.1, ANSI/BIFMA X5.5, ANSI/BIFMA X5.6, ANSI/BIFMA X 5.9 ANSI/BIFMA X5.11, ISTA Certification Council.

Leveraging his unique expertise, he has led Micom Laboratories to become a renowned name in its niche, now operating out of a 16,000-square-foot test facility in Montreal, Canada, and serving a diverse customer base with an array of material and product testing services. Follow Michel on LinkedIn

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