If there is a strong odor during the processing of plastic products, this may indicate that the raw materials are defective, there are impurities in them, or some products are added. So how should we solve it?
1.Use more pure resin
In many plastics, especially in plastics such as polyvinyl chloride, styrene, polyethyl acetate, and acrylate, the trace amount of residual monomers can produce an unpleasant smell. Use resins with very difficult monomer residues Eliminate those smells. It would also have a very bad effect if it used an inherently odorless resin.
The catalyst tertiary amines used in the production of polyurethane foam often bring very weak odors. One of the measures is to use polyhydroxy compounds. The remaining hydroxyl compounds are not only components of the polyurethane molecular chain, so they also have catalytic activity. Hydroxyl compounds can also replace half of the tertiary amine catalyst, so that the resulting product has less odor.
Phenol stabilizers used in PVC extrusion or calendering are often replaced by high-odor zinc stabilizers. The heat stabilizer tin octoate is also common in automotive PVC due to its high odor and low atomization characteristics. In products, vegetable-extracted oils such as erucic acid and oleic acid are much higher than amine lubricants (used for polyolefins and styrenic food packaging materials) made from animal-extracted oils.
If the polymer is filled with a small amount of zeolite (an aluminosilicate adsorbent), it can play a role in removing the odor of the material. The zeolite has a large number of crystalline disk surfaces, which can capture those small molecules with odor gas. Molecular adsorbents have been successfully applied in polyolefin extrusion pipes, injection and extrusion blow-molded containers, isolation packaging materials, extruded packaging materials and sealed polymers, and molecular adsorption powders can also be added to plastics as moisture absorbents. In addition to removing water vapor, this water vapor will also help plastic products produce odor.