What is plastic packaging? Types of plastic packaging

Packaging is the container that covers the outside of the product. Packaging can consist of several layers of coating, which may completely or partially cover the product. Packaging has many types such as plastic packaging (plastic packaging), paper packaging, metal packaging, glass packaging. Join us to find out what is plastic packaging? And the popular types of plastic packaging through the following article offline

1. What is plastic packaging?

Plastic packaging is a type of packaging produced hydrocarbon source from petroleum, separated in the oil refining process. Plastic packaging is usually odorless, tasteless, there are types that can achieve flexibility, press the surface of food when creating a high vacuum in case the product needs to be stored in a vacuum. Plastic packaging may be transparent to see the product inside, or it can be opaque, completely obscuring the light to protect food. There are types that can withstand sterilization temperatures or minus freezing temperatures. Plastic packaging can be printed easily and efficiently, and has a nice flat surface. Plastic packaging is lighter than all other packaging materials, very convenient in distribution and transportation.

Food-containing plastic packaging types are usually single-layer packaging but are made up of the combination of two or three types of plastic materials together to add the ability to create a complete packaging, to meet the requirements of the real type. products contained

The plastic materials used in food packaging are thermoplastic, and the higher the temperature, the more flexible it becomes.

2. Common types of plastic packaging

PE bags: include LDPE, LLDPE, MDPE, HDPE

Polyethylene is produced from the polymerization of ethylene gas C2H4 (CH2 = CH2) forming a polymer chain (-CH2-CH2-) n. Depending on the intended use, PE additives such as TiO2 can be mixed to create turbidity, C to create black color to prevent visible light, sliding agents, flame retardants or colorants.

POLYPROPYLENE - PP

Polypropylene (PP) has the closest relationship with PE. Both belong to the polyolefin family, formed from atoms C and H. On the market PP is produced in two main forms: homopolymers (polymer chains of propyle) and copolymers with ethylene, some chains of polymer chains. replaced with ethylene.

ORIENTED POLYPROPYLEN - OPP

The OPP membrane is a modified PP film, also homopoly of - (CH3- CH- CH2) -

Similar to PP, as OPP film is oriented in both perpendicular directions during fabrication: the longitudinal direction of the extruded film and the horizontal perpendicular to the length of the film.

Properties of opp packaging

High mechanical strength

Especially the ability to be torn easily when there is a cut or a small hole

There is higher transparency, surface gloss than PP

Heat resistance similar to PP

Has O2 waterproof properties

View more products: >> Explosive foam bag

POLYVINYLCHLORIDE - PVC

PVC is produced by polymerization of VCM vinyl chloride monomers, at low pressure, at low temperatures.

Properties of PVC

Unplasticized PVC products often lose color and discolor when heated to near the fabrication temperature, so a stabilizer must be added.

Less waterproof than PE, PP

The gas and grease waterproof properties are quite high, making it possible for the packaging to contain foods with a high fat content.

- Not damaged by acid and alkali

Destroyed by some organic solvents

- Tends to form mass due to the electrostatic interaction between them

POLYETHYLENE TEREPHTHALATE (PET)

PET belongs to the polymer group which is copolymers produced by condensation reaction. The abbreviation PET refers to a polyester that has used ethylene glycol as the starting substrate for the polymerization. PET has trade names as Mylar, Milinex, Hoslaphane and Terphane.

PET is an important material used in food packaging. PET is produced from the condensation reaction between ethylene glycol and dimethyl terephalate or terephthatic acid under low pressure.

Nature

High mechanical strength, able to withstand tear force and impact force, endure high abrasion, have high rigidity

Inert to the food environment

Crystal-clear

Better waterproof to O2 and CO2 than polyelefins.

PET film is always covered with another plastic layer outside to be able to heat-seal the packaging

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