Several methods of reducing plastic packaging irritant smell

Plastic is an important material in the packaging industry, plastic processing products can declare an unpleasant odor, in order to defeat this doubt, plastic resin yield processors have long been working to cut these smells declared level. Disposal methods are: using low odour substitute to replace those unpleasant additive; Cut plastic guess the amount of residual monomer; In plastic guess attends the antibacterial agent to avoid the gas adsorbent and due to the effect of bacterial and fungal odors; And in the process of reclaim plastic disposal can be cut by solvent extraction and exhaust residue.

plastic guess many compounds have unpleasant smell, containing amines, phenol, mercaptan, peroxide, benzene, aldehyde, ketone, some plasticizers and flame retardants. Used in the process of plastic processing solvent will also release the strong chemical odor. Cut plastic smell can choose the following several ways:

modification additive

polyurethane foam produced the catalyst used in the process of tertiary amine often leads to strong smell. Disposal of question solution is to find a substitute to these amine. One way is to use a polyol, polyol not only has the composition of polyurethane molecular chain, and also has the same catalytic activity. Some polyol and can replace half of tertiary amine catalysts, it was the smell of the product of too weak.

in the process of PVC extrusion may press the use of phenol class stabilizers are often replaced by low odour of zinc stabilizer. Plants to obtain oil such as erucic acid and oleic acid than animals for oil of amine lubricant ( Styrene for polyolefin and food packaging materials) The smell of the small lot.

to choose a more pure resin

many guess, particularly in polyvinyl chloride, such as styrene, ethyl acetate and acrylic ester plastic guess, the remaining trace monomer will happen unpleasant smell. Chooses monomer residue little resin can eliminate the odor.

if choose their own odorless resin also have very good effect. For example, dupont has developed a new rank of acetal copolymer, the smell of the resin in the process of injection processing release is very slim.

in adsorbent

if fill a few zeolite in polymer ( A kind of aluminosilicate adsorbent) The effect of odour, can rise to remove data. The crystallization of zeolite has a number of vague, these vague can capture with a smell of gas are small children. Molecular adsorbent has been successfully applied in polyolefin extrusion tubing, the injection and extrusion blow molding containers, barrier packaging materials, packaging materials and seal with polymer extrusion molding. Molecular adsorption powder also can be used as a moisture absorption agent added into the model guess to remove water vapor, the water vapor would also help plastic smell.

choose antimicrobial

in plastic guess for antibacterial agent is not able to cut its smell, can delay the products appearance aging, discoloration and brittle. The most commonly used antibacterial agent has 10, 10 & rsquo; - Double oxygen generation command evil arsenic ( OBPA) Three oxygen, hydroxy diphenyl ether ( Triclosan) , thiazole moiety ketone ( OIT) Sulfur, hydroxyl pyridine ketone ( 羟基吡啶硫酮) 。 Organic metal compounds that are rich in tin and silver is also sometimes used as antibacterial agent. Use antibacterial agent of the road is very wide, used for styrene thermoplastic elastomer TPO can be used as food packaging, medical equipment, bright food storage cabinet.

using the desorption solution

there is a in addition to taste method is to put plastic in activated carbon and high taste such as appearance product silicate adsorbent, vacuum disposal environment can accelerate the desorption process.

with especially the detergent solution of disposal plastic particles can also help to remove the smell. Usually these cleaners are rich in aqueous alkaline solution may surface active agent. The cleaner can be useful to get rid of vinyl chloride monomer, styrene, acrylate and acrylic acid monomer and unsaturated hydrocarbon, etc.

in balmy agent

in plastic guess balmy agent does not eliminate bad smell, but can be hidden these smells, in many cases it is sufficient to reach the intention. The method can be used in polyethylene, polypropylene and polyolefin thermoplastic elastomer, injection molding, extrusion and blow molding processing measures. Balmy agent storage time does not necessarily equate to forming a stature, its keeping time is determined by the degree of its buildup, appearance product volume ratio, is exposed to heat and humid environment, cut off and von berg systeme is carried on the close packing elements such as air. Balmy agent is usually used in the toy, daily products, cosmetics, household appliances and gardening equipment.