The simplest way to distinguish these types of customers with common plastics .

 Today plastic bags are in the period of " golden age " , ubiquitous . But few people know is that some of them are made from plastic materials harmful to human health .

In general, these kinds of PP , PE , PS is not toxic resins often used to produce food containers fixed as trays, boxes , plates . Toxic PVC should not be used to produce bags or food containers .

Want identify toxic plastic or not , use scissors to cut a piece of food bags on fire and observations :

• Plastic has no toxicity is highly flammable . After pulling out of the fire is still burning and has continued flowing liquid water , not fumes .

• In contrast , the hard plastic toxic fire exiting extinguished the fire going . When fire smoke and unpleasant smell weird .

In addition :

• Plastic Weight toxicity usually larger , easy to drop into the water sank , and the type of non-toxic in the water so light and easy .

• Plastic toxic touch that softer , ripple on the surface of tiny particles as small grains . Plastic stand not touching smooth as wax type ( according to family Polytechnic )

Consider the problem of toxic plasticizers when used can say that , all the plastics used for food packaging containing liquids are safe because the manufacturers have to comply with the legal regulations on how quality plastic packaging .

Identify possible by ... burning plastic

With the above knowledge , you can get to know the everyday plastic products from plastic original does . However, for greater certainty , can do a simple test that is burning . PE , HDPE , PP they belong to a chemical composition close to the same, if there is a low molecular weight similar to paraffin ( wax ) . Thus , if fire retardant , no burning smell , then there is PE , HDPE or PP . PET , ABS fire with flames and black smoke unpleasant smell . PVC also not fire into flame .

Hazardous if not used properly

Consider the problem of toxic plasticizers when used can say that , all the plastics used for food packaging containing liquid with well-known brands in the country or abroad, are safe for manufacturers must comply with the legal requirements in terms of quality plastic packaging .

The most worrying problem is the arbitrary use old packaging . It's not safe to use the paint bucket plastic containers for salt water melon , ca.Mot toxic chemicals in plastic paint will seep into the water diffusion - the acid pickle , tomato and harmful to health of consumers . Generally speaking , absolutely not use plastic bins to store water containing chemicals or eat liquid foods . It should be noted , when cooking oil , fish sauce , vegetable oil , alcohol, drugs , PET bottle use ( new or pure water ) because this type of bottle safety high on food hygiene .

Homeware any plastic that

Institute of Chemical Industry of Vietnam , Institute of Chemistry - Institute of Science and Technology of Vietnam and the research centers of polymer materials - the Hanoi University of Technology have succeeded in finding the combination of PE material ability decays to millimeter size in the natural environment for a period of about 3-6 months and are organized in small-scale production . Currently, the Ministry of Science and Technology is considering support for a business in Ho Chi Minh City to produce biodegradable plastic bags of this type provide the domestic market and export .

The advanced countries in the world have started to roll out the packaging market from polylactic acid biodegradable entirely to water and CO2 . Due to the high price so that the material in the future .

In daily life , the most common type of plastic is PE ( polyethylene ) . Go into some grocery stores or plastic , we easily caught many rectangular bags colorless or transparent bags have many different colors that habitually do not know since when mislabeled bags nylon ( nylon polyamid there is a kind of chemical composition and other properties entirely ) .

The milk bottles , soft drinks and some other liquid foods often high density polyethylene , HDPE abbreviated (high density polyethylene ) and PVC ( polyvinyl chloride ) for use in food categories . We can say in all major markets , small supermarket or roadside markets ... the goods are delivered to customers PE bag holder . However, the production of HDPE to the use of hazardous chemicals such as hexane and benzne .

A different type of plastic is close to PE PP ( polypropylene ) . Because PP has higher mechanical properties of PE should be spinning and weaving into the kind of packing rice , sugar , corn , soybeans , peanuts ... Depending on demand , which is left behind in a moisture-proof membrane . PP yarn was woven into the canvas to cover rain , sunshine is very popular in both urban and rural areas . The types of buckets, pots, baskets made ​​of polypropylene are often considered the best type of plastic .

Purified water bottles with a capacity of 0.3 ; 0.5 and 1.0 liter normally found on the agency's reception desk , restaurant dining table , family , business or bring tourism , mainly made of PET plastic ( polyethyleneterephtalat ) . The resin has good mechanical strength so as not vote , crack or break during transport .

The larger bottle with a capacity of 5 liters , 20 liters and made ​​of plastic . A large amount of PET bottles have different capacity can also be used to for containing vegetable oil ( soybean , sesame , peanut ... ) ... However, this plastic can leak into the water an- ti - metal subjects and lead oxides are toxic especially when put in hot water or to high temperature environments . Scientists also do not recommend reusing plastic bottles made ​​of PET because it is difficult to clean and may contain disease-causing bacteria .

The food storage box rectangle ( storage box) domestic processing or Chinese origin have not body color , slightly opaque lid also has various light colors usually polyethylene or HDPE . A cylindrical containers with a lid or bottom so tapering mugs stacked multiple units for compact transport and arranged well before using PE or HDPE resins . On the box lid braille subject line says safe for microwave ( This is microwave oven safe) .

Kettle super speed , fan casing , casing and tubing vacuum enclosed largely made ​​of ABS plastic ( acrylonitil butadiene - styrene ) . This type of plastic to withstand boiling water without deformation , have good mechanical properties , particularly high impact resistance . So when vacuuming the floor on an area wide , strong kicking leg can take to flee to other locations and on foot , and if there are tables, chairs okay .

All of the above types of plastics such as PE , HDPT , PVC , PET , ABS thermoplastics that are attached to them when the temperature rises , the soft and flowing and viscous when cooled back to the initial solid state . Since we all use for general purposes should also known as thermoplastic commonly used ( commodity thermoplastics ) .

One type of product has been in our country is produced by China tea per individual cylinder and screw cap tight inner filters to block the tea leaves when pouring or drinking directly . This plastic bottle made ​​of PC ( polycarbonate ) transparent, have high mechanical strength and heat resistant than plastic PET should be able to pour boiling water directly to the average tea without distortion . Due to the mechanical strength and high heat resistant polycarbonate classified as thermoplastic engineering ( engineering thermoplastics ) . Nylon resins also belong . PC containing toxic chloride , causing leakage of dioxin , toxic substances cause cancer .

Many types of bowls, plates have very beautiful motifs on white background and holding feel is not actually plastic but this product made ​​from a combination of melamine - formaldehyde resin has more fillers and additives , often referred to as melamine resin . This type of thermosetting plastic ( thermoset plastics ) , meaning that when heated to a certain temperature and can be solid again raise temperature not too hot to melt .

 

Source : Vietnam Plastics Association Website .