Nano-calcium carbonate modified PVC resin passed provincial appraisal
Nanotechnology is a cross-cutting and frontier discipline that has gradually developed in the late 1980s. At present, the State Economic and Trade Commission has included nanomaterials in the list of...
Determination of carbon black content in polyethylene pipes and fittings (thermal weight loss method)
1. Heat the combustion boat until it is hot, then cool in a desiccator for at least 30 minutes and weigh to the nearest 0.0001g. (1.0 ± 0.1)g of polyethylene samples were placed in a combustion boat...
Preconditions and conditions for PVC internal and external lubrication
PVC lubricants are divided into internal lubricants and external lubricants. However, the internal and external lubricants are relatively different, and there is no strict classification standard....
Calcium carbide: the price continues to decline, and the market supply and demand game
Analysis of calcium carbide market Today, the domestic carbide market continues to decline. The price of each region has been reduced by 50 yuan/ton. Most of the mainstream ex-factory prices have...