Moisture-proof is an important measure to ensure the safety of outdoor electrical equipment. In addition to the advanced humidity control measures such as temperature and humidity control device and moisture-proof monitoring system, a new type of environmental friendly moisture-proof sealing material -- moisture-proof and fire-proof sealant, is increasingly used for outdoor padmount transformer, cable box, outdoor terminal of substation and other common outdoor electrical equipment. Continue reading
Basically, increasing the thickness of film materials is one of the important measures to improve the barrier properties of packages. Meanwhile, the increase of materials thickness is bound to increase packaging costs. This article studied the influence of increasing the thickness of single layer membrane in composite materials on the barrier properties of packages, through test the oxygen permeation of film materials with different thickness. Continue reading
The moisture permeability of sanitary towel substrate material influences its comfort directly. This article introduces a WVTR test of two sanitary towel substrate films from two manufacturers using cup method, including test principle, testing instrument C360M Water Vapor Transmission Rate Test System and its features Continue reading
Common aluminum-coated substrates include PET, BOPP, CPP, etc. After coated with vapor deposition of aluminum, aluminum-coated films such as VMPET, VMBOPP, and VMCPP are formed. The barrier properties of aluminized films may vary with different manufacturers, evaporation processes and even different batches. The differences are in thickness, density of the aluminized layer, and the COF between the aluminum layer and the substrate. This article introduces a study on whether the substrate of an aluminum-coated film will affect its barrier properties. Continue reading
The bonding strength between the collector and the active substance may encounter some problems during charging and discharging processes. Labthink laboratory right has the experiences in test of the bond strength of collector electrode. Recently we arranged such a test for Li-ion battery electrode Continue reading