Plastic products can produce unpleasant odors during processing. What are the causes of these odors? How should we remove these odors? Let's take a look at the six ways to remove odors with Xiaobian! Cause of odor (1) The materials are more complicated (2) Material processing and degradation (3) Decomposition of small molecular materials in materials (3) Sometimes the moisture and materials have a strong accelerated degradation (4) Many compounds in plastics have an unpleasant odor, including amines, phenols, mercaptans, peroxides, benzenes, aldehydes, ketones, as well as some plasticizers and flame retardants. Solvents used in plastic processing also release a strong chemical odor Method for removing plastic odor 1. Change additives The tertiary amines used in the production of polyurethane foams often give rise to strong odors and fog on the interior windows of automobiles. The solution to this problem is to find alternatives to these amines. One of the measures is to use a polyhydroxy compound which is not only a component of the polyurethane molecular chain but also has catalytic activity. Phenol stabilizers used in PVC extrusion or calendering processes are also often replaced by low odor zinc stabilizers. The heat stabilizer tin octylate is also commonly used in automotive PVC products due to its low odor and low atomization properties. Plant extract 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, using a more pure resin In many plastics, especially in plastics such as polyvinyl chloride, styrene, polyethyl acetate and acrylates, residual traces of monomers can produce unpleasant odors. Those odors can be eliminated by using a resin with a small amount of monomer remaining. 3, adding adsorbent If a small amount of zeolite (an aluminosilicate adsorbent) is filled in the polymer, the effect of removing the odor of the material can be achieved. Zeolites have a large number of crystalline voids that capture small molecules of odorous gases. Molecular adsorbents have been successfully applied to polyolefin extruded tubing, injection and extrusion blow molded containers, insulation packaging materials, extruded outer packaging materials and sealing polymers. Molecularly adsorbed powders can also be added to plastics as moisture absorbers to remove moisture, which can also contribute to the odor of plastic products. 4, the use of antibacterial agents Adding an antibacterial agent to the plastic not only reduces the odor it emits, but also delays the aging, discoloration and embrittlement of the surface of the product. The most commonly used antibacterial agents are 10,10'-oxobiphenanthrene, trioxyhydroxydiphenyl ether, isothiazolinone, pyrithione. Organometallic compounds containing tin and silver are sometimes also used as antibacterial agents. 5, using the desorption method Another method of deodorization is to place the plastic in an odor sorbent such as activated carbon and high surface area silicate. The vacuum treatment environment can accelerate the desorption process. Treatment of plastic particles with a special detergent solution can also help to remove odors. Generally these detergents are aqueous or alkaline solutions containing surfactants. These detergents can effectively remove vinyl chloride monomers, styrene, acrylates, acrylic monomers, and unsaturated hydrocarbons. 6, add fragrance Adding a fragrance to a plastic does not eliminate the unpleasant odor, but it can cover these odors, which in many cases is sufficient. The method can be applied to polyethylene, polypropylene and polyolefin thermoplastic elastomers by injection molding, extrusion or blow molding. The retention time of the fragrance does not necessarily equate to the life of the molded part. The retention time depends on the degree of aggregation, the volume to surface area ratio, whether it is exposed to a heated or humid environment, and whether the molded part is tightly insulated from air packaging. Fragrances are generally used in toys, household goods, cosmetic containers, household appliances and gardening equipment. Fiberglass woven roving is a versatile composite reinforcement material composed of continuous glass fiber filaments coated with a coupling agent or binder. The glass fibers are woven into a fabric with a plain or twill weave pattern, providing strength and stability. fiberglass woven roving, fiber woven roving, E-Glass Woven roving Jinwu Glass Fiber Co., Ltd , https://www.jwnetwindows.com
With its high strength-to-weight ratio, fiberglass woven roving is an ideal reinforcement for plastic composites across many industries. It exhibits high tensile strength along with impact, chemical and heat resistance. The woven construction provides multi-directional reinforcement, dimensional stability, and ease of handling.
Fiberglass roving is compatible with polyester, vinyl ester and epoxy resins. It is widely used as a reinforcing material in boat hulls, auto bodies, bathtubs, roofing, piping, storage tanks and other composite components. It is also valued for electrical insulation applications.
When saturating the woven roving with resin, proper wet-out and cure is critical to achieve optimal mechanical properties in the finished composite. Fiberglass roving comes in various weights, widths and weave patterns to suit the reinforcement requirements of the application. With its combination of high strength, corrosion resistance, and cost-effectiveness, fiberglass woven roving continues to be a staple composite material across many industries.
How is plastic odor generated and how to remove it? What you want to know is here.