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The Weifang Tainuo chemical industry Limited company is located in “the world kite” - - Weifang, south near the rubber Jinan railroad, north depends on 309 federal highways, the blue silver highway, the geographical position is superior, the traffic conditions are convenient. in 2006 sets up with joint forces by the original Shandong four stars in the bowl of the big dipper specialized team, is domestic devotes to the development green environmental protection safety product for the mission specialty company.
Tainuo Chemical always focus on chemicals and keep researching and supplying chemicals for our customers .Now we will supply you with new series chemical: Oxalic Acid
Since the partially alcoholized PVA contains more acetate groups, and the volume of the acetate group is much larger than the hydroxyl group, there is a large steric hindrance, so that the partially alcoholized PVA cannot form a compact crystal structure. It can only form loose structures with large
The degree of alcoholysis has an effect on the water solubility, viscosity, adhesion and serosity of the slurry.1． Water solubility:PVA with fully alcoholysis is poor in water solubility,for example,PVA with Alcoholysis degree more than 99%(Mole fraction) begin to dissolve when it is heated above 9
Melamine formaldehyde molding compound is made of "melamine formaldehyde resin" as a base material, "Alpha" cellulose as a filler, and added with pigments and other additives. It has the characteristics of water resistance, high temperature resistance, non-toxicity, bright color and convenient moldi
Views:0 Author:艾彩霞 Publish Time: 2019-04-30 Origin:Site
Since the partially alcoholized PVA contains more acetate groups, and the volume of the acetate group is much larger than the hydroxyl group, there is a large steric hindrance, so that the partially alcoholized PVA cannot form a compact crystal structure. It can only form loose structures with large spaces between molecules, which can absorb more air.In the process of boiling size,because the size has a certain viscosity,it provents the small bubbles from escaping from the size surface,and forms the accumulation of small bubbles,which produces greater energy,thus making the size overflow the size mixing kettle.If there still is bubble in the sizing box,a foam layer will form form on the surface of the sizing,which will affect the operation of the worker and also affect the sizing quality.
The way to eliminatiing the foam is to add an antifoaming agent in the sizing box or the mixing kettle.The antifoaming agent is actually a sufactant with few hydrophilic groups,which can reduce the surface tension of the foam and rapidly break the foam,thereby reducing the accumulation of the foam and achieving the purpose of defoaming.
