Plastic is an important raw material in the packaging industry of cosmetics bottle manufacturers. Plastic processed products will emit unpleasant odors. To overcome this problem, plastic resin producers and processors have long been working to reduce the level of these odors. The solutions are: replace low-odor additives with low-odor additives; reduce the amount of residual monomers in plastics; add gas adsorbents and antibacterial agents to plastics to prevent the difficulties caused by bacteria and fungi Smell; there is also the possibility of reducing residual odor by solvent extraction and exhaust in the process of recycling plastic.
Cosmetic packaging bottle manufacturers using special detergent solutions to treat plastic particles can also help remove odors. Generally these cleaners are aqueous or alkaline solutions containing surfactants. These cleaners can effectively remove vinyl chloride monomer, styrene, acrylate, acrylic monomer and unsaturated hydrocarbon, etc.
The first step in objectively confirming the smell is to ask a group of people to distinguish whether the smell they smell is pleasant or unpleasant. According to the response of the discrimination team, standard instrumental analysis methods such as meteorological chromatography and solid-state spectroscopy (GS / MS) are used to determine the level of plastic volatiles. But these earlier instrument analysis systems require careful analysis and evaluation by experts in order to draw accurate conclusions. The new plastic odor detection instrument is a device called "electronic nose", which relies on electronic probe dot matrix and pattern recognition technology to work. The instrument operator heats the sample and guides the released volatiles into the probe lattice for detection. The obtained results are displayed in digital mode, so it is easy to correlate with the conclusion of the discrimination team. According to specific requirements, volatile odors can be classified as pleasant, neutral, unpleasant, or reported in the form of intensity and molecular aggregation
Waste plastics often produce an unpleasant smell. Most recycled plastic packaging, such as hdpe, pp, pvc and pet, etc., will be washed with an aqueous solution to remove contaminants. But the smell adsorbed inside the plastic will remain. Organic solvent extraction methods help remove odor-causing compounds. A new solvent extraction method also uses supercritical carbon dioxide as the solvent. This technology has been applied to hdpe and pet, it can remove odorous pollutants on oil containers, pesticide containers and other waste devices. The advantage of the carbon dioxide extractant is that it does not cause troublesome post-treatment problems with organic solvents.
The odor removal device is an integral part of the waste plastic pellet extruder. It can also effectively remove some strong volatile compounds that will generate odor.
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