How to reduce the smell of plastic?
Plastic is an important raw material for the packaging industry, plastic processing products will emit an unpleasant odor, in order to overcome this problem, the production and processing of plastic resins have long efforts to reduce these odor emissions levels. Apart from the plastic manufacturers, the paint supplier also need to find the way to remove the unpleasant odor. Solutions for solving this problems are: a low odor alternatives to replace those unpleasant additives; reduce the amount of residual monomers in plastics; adsorbent used in plastics and adding antimicrobials to prevent those due to bacterial and fungal difficulty arising smell the odor; as well as in the processing of recycled plastics may be by solvent extraction and exhaust to reduce the residual odor. Many of the plastic compounds have an unpleasant odor, including amines, phenols, thiols, peroxides, and benzene, aldehydes, ketones, and some plasticizers and flame retardants. Plastic processing solvent used in the process also releases a strong chemical odor. Here you can take to reduce plastic smell several measures:
Changing the Additives
Polyurethane foam used in the production process of the catalyst will often bring a strong amine odor. Solution to the problem is to find a substitute for these amines. One of the measures is the use of a polyhydroxy compound, a polyhydroxy compound having not only the composition of the polyurethane molecular chain, and also has catalytic activity. Some polyhydroxy compound can replace half of the tertiary amine catalyst; the product thus obtained is weak odor more.
In PVC extrusion or calendering process used phenolic stabilizers are often low odor replaced zinc stabilizers. Plant extracts, such as erucic and oleic acid oils than animal amines obtained oil extracted lubricant (for polyolefins and styrenes food packaging material) odor smaller.
Adopting a more pure resin
The plastics, especially polyvinyl chloride, styrene, ethyl acetate and poly acrylate plastics, the residual trace monomer may produce unpleasant smell. Using a small amount of residual monomer resin can eliminate those odors.
If the fill of the polymer in a small amount of zeolite (an aluminum silicate adsorbent), can play a role in odor removing. Zeolite having a large number of crystalline voids, and the voids can capture the gas molecules. Molecular adsorbent has been successfully applied polyolefin pipe extrusion, injection and extrusion blow molded containers, isolated packaging materials, packaging materials and extruded polymer seals. Adsorption powder can also be added as a hygroscopic agent to remove the plastic vapor, and water vapor will also help this plastic odor.
Added fragrances in the plastic does not eliminate unpleasant odor, but you can hide these odors, in many cases this is sufficient to achieve the purpose. This method can be applied to polyethylene, polypropylene and polyolefin thermoplastic elastomeric, the processing method for injection molding, extrusion or blow molding. Fragrances retention time does not necessarily equate to the life of molded parts, and its retention time determined by their degree of aggregation, the volume ratio of the surface area, whether exposed to heat or humid environment, as well as molded parts are isolated from the air for a tight packing and other factors. Aromatics generally used in toys, household goods, cosmetics containers, household appliances and garden equipment.
As we all know, the medical products are play an important role in our daily life, especially for the health care products.
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