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Measures to reduce the odor of plastic injection part […]
Measures to reduce the odor of plastic injection parts? Injection molding seems to be simple, but it does not allow any mistakes, processing ratio and process problems, will lead to mold odor, reduce the quality level of the mold, and also cause damage to the user's health. So, what measures to reduce the odor of plastic injection parts? Let's take a look at the following.
1. Control additive uses
Fillers, plasticizers, colorants (colorants), lubricants, stabilizers, foaming agents, crosslink agents, curing agents, and the like may be used in plastic injection parts. These materials are produced by fir to impart ethylene, hydrogen sulfide, sulfur dioxide, amine, ammonia odor or other odors to the plastic product. Therefore, try to control the proportion and weight of the additive, and use a zinc stabilizer instead of the phenol stabilizer in the PVC extrusion or calendering process. The heat stabilizer tin scent has a small odor and low atomization characteristics. Plant extracts oils such as erucic acid and oleic acid are much less odorous than amine lubricants (for polyolefin and styrenic food packaging materials) made from animal extract oils.
2, add fragrance
The addition of a fragrance during the injection molding process is only to cover the odor. It can be used for plastic injection parts of low odor. This method can be applied to injection molding, extrusion or blow molding of polyethylene, polypropylene, and poly olefin thermoplastic elastomers. Generally used in daily goods, cosmetics containers, household appliances, and gardening equipment.
3. Using activated carbon and other adsorption decomposition methods
The vacuum treatment environment can promote the desorption process by utilizing the adsorption capacity of odor adsorbents such as activated carbon and high surface area silicates. Special detergent solutions can also be used to remove odors. Generally, these detergents are aqueous or alkaline solutions containing surfactants.
4, the use of high purity resin
In many plastics, such as in the production of plastics such as polyvinyl chloride, styrene, polyethylene acetate and acrylates, residual trace amounts of monomers can produce unpleasant odors. The use of resin with a small amount of monomer residue can reduce the appearance of odor.
If a small amount of zeolite is filled in the polymer, the effect of removing the odor of the data can be achieved. Zeolites has a lot of crystal vacancies that capture small molecules of odorous gases.