abrasive wheel on the wrong lest carefully selected raw materials

Just saw a diplomatic storm news, poisonous dumplings triggered seven years of poison dumpling case affects the reputation of Chinese exports, but also a diplomatic storm, so that people raise questions on Chinese food, do not trust to a certain level. Subsequently, the strong focus on domestic government to eliminate these negative phenomena. After processing has been worlds apart, a lesson that we can not be repeated, as  PINEZONE abrasive sanding belt the Wheel "> resin wheel production enterprises, the use of raw materials is doubly concerned.
 Phenolic resin (phenolic resin) referred to PE. Phenolic resin is yellow, transparent, amorphous bulk material, due to the presence of free molecules reddish, the proportion of 1.25 to 1.30, soluble in alcohol, insoluble in water, water, weak acid, weak base solution stable. From phenol and formaldehyde in the catalyst conditions, condensation, and the resin was washed with water and made. Due to use of different catalysts can be divided into two types of thermoset and thermoplastic. Phenolic resin has good acid  PINEZONE PSA sanding disc resistance, mechanical properties, heat resistance, widely used in anticorrosion, adhesives, flame-retardant materials, resin grinding wheel manufacturing and other industries. The thermosetting phenolic resin is also an important raw material for adhesives, a single brittle phenolic resin is mainly used for bonding plywood and sand casting. Other polymer-modified phenolic resin-based adhesive material, plays an important role in the structure of the gel. Which phenolic - nitrile phenolic - acetal, phenolic - epoxy, phenolic - epoxy - acetal, phenolic - nylon and other adhesive has good heat resistance, high bond strength characteristics. Phenolic - nitrile and phenolic - acetal adhesive also has tensile, impact resistance, heat aging performance, structural  PINEZONE abrasive cloth belt adhesives varieties. After phenol and formaldehyde synthesis of similar chemical structure as ethyl acetate, methyl merely replaced the ring, so that this structure relative to urea-formaldehyde, melamine is considerably more stable, which is difficult to decompose, not easily produce formaldehyde, so environmental protection higher. And ester (fat) class has a feature that is not soluble in water, so with phenolic resin has some moisture function, and a small amount of water vapor and will not cause a drop of glue floor!
For all sorts we are strictly similar unpleasant event does not occur, to avoid the consequences of rebirth.