Elaborate molding resin abrasive loose materials research

Ordinary resin abrasive multi- phenolic resin powder as binding agents , phenolic resin solution as a wetting agent , molding material is easy sticky lumps, loose poor , especially in hot , rainy summer , often difficult scraper . In recent years, the introduction of automatic presses , feeding and scraping are mechanized automatic operation of the  ceramic flap disc resin molding material loose abrasive than manual operation requires a higher end, we use domestic raw materials for resin loose material a preliminary exploration. A resin molding material does not lead to loose causes and ways to solve
1.1 We believe that the cause of the molding material does not cause the loose agglomerate is mainly due to easy phenol resin solution containing free phenol ( at a level of about 20% ) , a portion of the free phenol can dissolve the phenol resin powder adhered to the resulting mill dry resin powder particle surface tacky . In addition , phenolic resin powder is easy to absorb moisture, the moisture absorption too sticky , the higher the temperature, the greater the liquid phenolic resin, phenolic resin powder solubility . So, in the summer and the rainy season , the resin molding  abrasive disc material is easy to agglomerate. 1.2 Uses for solving the above-mentioned reasons, we loose material from the three approaches to be explored : ① using refractory phenolic resin powder as binder ; ② using free phenol -free wetting agent ; ③ new mixing process 2 test brief introduction
2.1 refractory phenolic resin powder
Softening point and the degree of polymerization and the degree of moisture absorption on the phenol resin powder , melting point , the greater the degree of polymerization , the lower the degree of moisture absorption , a phenol resin powder as the degree of polymerization greater the phenol resin solution , the harder it is dissolved , so use phenolic resin powder as a refractory binder effective to reduce the degree of sticking and agglomeration of the molding material . Test proved : refractory phenolic resin powder / liquid mixing phenolic resin molding material out , placed within two hours without caking ; placed two hours - slightly caking within two days in the plastic bag , in a twist sieve , namely loose open to non-phenolic wetting agent 2.2
Although many of the liquid phenol , but it can meet the requirements of little loose material , after testing, we  Sanding Sheets found that triethanolamine is an ideal wetting agent , triethanolamine moderate toxic, non-irritating odor , viscosity, price cheaper , with phenolic resin powder / triethanolamine mix the resin molding material is very loose , non-caking, and loose without affecting the melting point of the phenolic resin powder , body strength and wheel to ensure performance , as shown in Table 5, Table 8 , can be balanced furnace inspection .
After testing, phenolic resin powder / triethanolamine mixed with a resin molding material, is placed within the three days , no agglomeration , prior to feeding the screen no longer loose feel good scraper , which is a phenol resin having a melting point of 84 ℃ powder , mixed material out of the molding can also be placed three days , the same loose .