Plastic chemical resistance media test

Plastic containers are often used for the packaging of chemical products containing oily foods, medicines, pesticides, acids, alkalis, various solvents and oils. When in contact with them, when the molecular polarities of the plastic and the reagent are similar, the reagent will penetrate into the interior of the polymer to form a match. When this binding force exceeds the cohesion between the polymer chains, the molecules will be pulled apart from each other, and the solvent molecules will take advantage of the gap, causing a melting phenomenon. Even further development will result in the polymer chain dispersing the agent into the solvent and showing a dissolved state. Under certain conditions, hydrolysis will occur when water, acid, alkali and other reagents come into contact with polymers, especially polyester plastics (polyester, polycarbonate, polyurethane). Plastic chemical resistance test can measure its resistance to chemical media and is suitable for various plastic products.
Zhongke Testing Reliability Experiment Center has the capability of reliability testing of various plastics and provides professional chemical resistance testing services for plastics and related products.

Plastic products or components are mainly divided into:
1. According to the molding method and product structure, it can be divided into compression molded products, blow molded products, and extrusion molded products.
2. According to different raw materials, it can be divided into polypropylene, polyvinyl chloride, polyethylene products, etc.
3. According to the classification of geometric shapes and uses, plastic shoes, wires, plastic containers, cables, etc. are common in daily necessities. In the production industry, there are plastic industrial parts and other products. In education, there are also plastic products for culture, education, and sports.

Under specified temperature or/and stress conditions, after the sample is exposed (immersed or wetted) in a chemical medium for a specified time, the changes in mass, size or mechanical properties of the sample are measured to determine the chemical medium resistance of the plastic.

HB 8402-2013 Test method for chemical resistance of plastics
GB/T 2918 Plastic test condition adjustment and standard environment for testing