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Common five kinds of plastic bottles introduction and use taboo

Common five kinds of plastic bottles introduction and use taboo

(Summary description)Polyethylene terephthalate (PET or PETE, commonly known as polyester resin). It is a durable thermoplastic that exhibits high resistance to chemicals, high energy radiation, moisture, erosion and abrasion. Depending on the process and the heating process, PET may be transparent or semi-crystalline.

Common five kinds of plastic bottles introduction and use taboo

(Summary description)Polyethylene terephthalate (PET or PETE, commonly known as polyester resin). It is a durable thermoplastic that exhibits high resistance to chemicals, high energy radiation, moisture, erosion and abrasion. Depending on the process and the heating process, PET may be transparent or semi-crystalline.

Information

Common five kinds of plastic bottles introduction and use taboo

 

First, polyethylene terephthalate (PET)

 

Polyethylene terephthalate (PET or PETE, commonly known as polyester resin). It is a durable thermoplastic that exhibits high resistance to chemicals, high energy radiation, moisture, erosion and abrasion. Depending on the process and the heating process, PET may be transparent or semi-crystalline. However, PET can add different colors depending on the application. It is worth noting that PET does not contain polyethylene, although the name contains (polyethylene).

 

use

 

One of the main uses of PET is plastic bottles and other plastic containers, such as mineral water bottles, beverage bottles, bakery product containers, etc.; because it is very easy to prepare into various shapes, it is suitable for cosmetics; PET film can make balloons, food Bags, space blankets; can also be used as salad trays, salad decorations and jars for drugs.

 

Second, high density polyethylene (HDPE)

 

High density polyethylene (HDPE) is a semi-elastic hard plastic that is easily formed by catalyst polymerization in a suspension, solution or gas phase reactor. It is resistant to chemicals, moisture, and can prevent any situation, but it cannot withstand temperatures above 160 °C.

 

 

 

use

 

HDPE is opaque, but can be colored under demand. HDPE products are safe for storing food and drinks, so they are used in shopping bags, refrigerated bags, milk bottles, ice cream boxes and juice bottles. It is also used in shampoos and sauce bottles, soap bottles, detergents, bleaches and agricultural pipes.

 

Third, polyvinyl chloride (PVC)

 

Polyvinyl chloride (PVC) comes in two forms, one is rigid non-plastic polyvinyl chloride (PVC-U) and the other is elastic plastic polyvinyl chloride (PCV-P). PVC can be formed from ethylene and salt by polymerization of vinyl chloride.

 

use

 

PVC is fire resistant due to its high chlorine content and is also resistant to oils and chemicals (except aromatics, ketones and cyclic ethers). PVC is durable and can withstand aggressive environmental factors. PVC-U is used for warm water pipes and fittings, curtain wall glass, roofing steel sheets, cosmetic containers, bottles, windows and door frames. PVC-P is commonly used as cable jackets, blood bags and tubing, watch bands, garden hoses, and soles.

 

Fourth, polypropylene (PP)

 

Polypropylene (PP) is a strong and flexible thermoplastic that withstands temperatures up to 200 °C. PP is made from propylene gas under the action of a catalyst such as titanium chloride. As a light material, PP has high tensile strength and high resistance to corrosion, chemicals and moisture. Moreover, it can be colored in a variety of ways without compromising quality.

 

use

 

Compared to other plastics, the higher melting point, PP can be used to make food containers for use in high temperature places such as microwave ovens. (Attention! It is the only plastic that can be placed in a microwave oven that we are exposed to in our daily lives)

 

PP can be used as a bubble bottle and ice cream bucket, butter box, potato chip bag, straw, microwave plate, kettle, patio furniture, lunch box, prescription bottle and blue packaging tape. PP can also be used to make plastic parts such as plastic toys and cell phone cases and protective cases.

 

5. Low density polyethylene (LDPE)

 

Low density polyethylene (LDPE) is softer and more flexible than high density polyethylene (HDPE). LDPE is obtained by polymerizing ethylene under high pressure in a high pressure steam or tubular reactor. It has good chemical resistance and good electrical properties, and high impact strength at low temperatures.

 

LDPE is compatible with most food and household chemicals and acts as an oxygen-poor barrier. It is used for stretch packaging because of its high molecular elongation.

 

use

 

LDPE is mainly used in plastic food packaging, garbage bags, squeeze bottles, black irrigation pipes, trash cans, and plastic shopping bags.

 

These five kinds of plastics are very common in our daily lives, and most of them deal with food. But not all plastics can contain food without any taboos. So, how do you distinguish it? Here's a little trick.

 

The Plastics Industry Association has developed a plastic recycling mark that divides plastic into seven categories, each of which represents a plastic. Although it is a recycling mark, it is also a health sign.

 

No. 01: PET material. Not suitable for high temperature liquids, not suitable for heating, high temperature is easy to dissolve harmful substances to the human body. After 10 months of use, carcinogens may be released, so throw them away after use, and do not use them for water.

 

No. 02: HDPE material. Easy to clean is not thorough, it is best not to recycle.

 

No. 03: PVC material. Cannot be used for food.

 

04: LDPE material. When the temperature exceeds 110 degrees, a hot melt phenomenon occurs, and a plastic preparation that cannot be decomposed by the human body is melted.

 

05: PP material. It can be reused after careful cleaning.

 

06: PS material (polystyrene). Can not be hot, can not contain strong acid, strong alkaline food, beverages.

 

07: Other plastics, mainly PC (polycarbonate). It is not advisable to use PC to install hot water.

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