![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)
Exposure to chemicals can lead to discoloration, softening, cracking, or degradation of plastic materials. When plastics soften and swell, their weight increases while tensile strength decreases. Cracking or crazing can reduce the elongation properties of the material. Crystalline polymers typically exhibit lower viscosity and better flowability compared to amorphous polymers, which tend to be more viscous and less chemically resistant. As a result, parts made from crystalline resins usually have lower stress resistance but higher chemical resistance. Due to its strong chemical resistance, especially in applications like dishwashers, polypropylene has become a cost-effective alternative to stainless steel for internal components. Although polypropylene offers excellent chemical resistance—among the best of all plastics—it’s still important to develop reliable testing methods to ensure its long-term stability under harsh conditions.
Without a proper and stable testing system, polypropylene could degrade in the extreme environment of a dishwasher drum. Test results show that unstable materials tend to discolor quickly. While this color change doesn’t impact the mechanical performance of the material, it is undesirable from an aesthetic standpoint, as it affects the overall appearance of the product.
Given the need to develop a new dishwasher inner bucket as quickly as possible, we used a dynamic computer simulation program to model the drop test, similar to how car manufacturers simulate crash tests. The software, LS-DYNA (456*789), is a general-purpose explicit finite element analysis tool that simulates nonlinear dynamic responses of structures and mechanical parts. By using these simulations, we were able to design the inner tub without needing physical prototypes, significantly reducing both time and costs.
When applying engineered polymers to different structural applications, it's essential to understand how strain rate and temperature affect the material's deformation. This data helps ensure the material performs reliably under real-world conditions.
RYEOGLOBAL Co,.LTD , https://www.ryeolab.com