What material is generally used for cosmetic plastic bottles?

Cosmetic plastic bottle is a blow molding process to form a transparent white plastic packaging container, using the two-step molding principle, that is, after the injection molding process to form the intermediate product bottle blank, and then after the blow molding process to form a plastic bottle. This article mainly introduces the material of cosmetic plastic bottles and the different meanings represented by the different characters on the bottom of the plastic bottles on the market.

Here is the list of contents

Common materials of cosmetic plastic bottles

The different meanings of the words on the bottom of plastic bottles

The common materials of plastic bottles for cosmetics

With the increasing demand of the market, in order to meet the packaging needs of different products, the selection of materials for cosmetic plastic bottles is also gradually enriched. At present, there are three main materials commonly used in the market, namely PET plastic, PP plastic and PETG plastic. The vast majority of packaging containers for ordinary cosmetics and detergents are made of high-density polyethylene.

PET is an environmentally friendly material, which is polyethylene terephthalate. The plastic cosmetic bottles made of PET material have the characteristics of high barrier, light weight, and unbreakable, etc. In addition, PET material is also resistant to chemical resistance, and its transparency is very strong, so it can be used to make pearl, colored, magnetic white, transparent and other styles of bottles, which are widely used in containing gel water. PET material is easily deformed when it is heat resistant to 70℃, and harmful substances will be leached out, which is why mineral water bottles cannot be filled with hot water. Therefore, PET material made of plastic bottles cannot be exposed to the sun, at the same time, this type of material bottles should not be filled with wine, oil and other substances. It can be filled with room temperature water in a short time, but it is not suitable for acidic and alkaline drinks.

PP material is polypropylene, a colorless, odorless, non-toxic, semi-transparent solid substance. Polypropylene is a thermoplastic synthetic resin with excellent performance and is a colorless and translucent thermoplastic lightweight general purpose plastic. Polypropylene has the characteristics of chemical resistance, heat resistance, electrical insulation, high strength mechanical properties and good high wear resistance processing properties. Plastic bottles made of PP material have good transparency and gloss, and are highly appreciated and quite popular. PP polypropylene, which can be used to make microwave lunch boxes, is the only plastic box that can be put into the microwave oven and can be reused, which shows that polypropylene material is highly resistant to high temperatures.

PETG is polyethylene terephthalate-1,4-cyclohexanedimethanol ester. Compared with PET, PETG material has higher transparency, better chemical resistance, better oil resistance, and better yellowing resistance than PET. Plastic bottles made of PETG material are often used for various long-lasting daily products, such as cosmetic bottles, perfume bottles, pharmaceutical packaging containers, etc.

The different words on the bottom of plastic bottles represent different meanings

The bottom of ordinary mineral water bottles is mostly "1-PET" or "1-PETE"); the bottom of bottles for shampoo, shower gel, clothes detergent, etc. are marked with "2-HDPE ". And in the bottom of plastic water cups, milk bottles, with arrows in the triangle with the number "7". However, in many cases we can find that some stalls on the plastic bottles, the bottom without any identification. In the purchase of plastic bottles, be sure to choose products with a logo, these products are selected from regular materials, quality assurance.

No. 6 logo plastic products made of PS polystyrene, at high temperatures will release chemicals, cannot be used for strong acids, strong alkaline substances. 7 "OTHER" logo represents made of other plastics, such containers if there is a breakage, should stop using, because they are the surface of the micro-pitted, easy to hide bacteria.

When using plastic containers, be sure to read the numbers marked in the triangle at the bottom of the bottle, only to understand the material properties can be used in the appropriate environment.