Glass is a transparent substance of one or more kinds of guayates, which can be classified according to its raw materials, composition, chemical composition, color and so on. According to its raw materials, it can be divided into: 1. Sodium lime glass, which is ordinary glass, is used to make bottles, cups, lampshades and low-cost compactors; 2. Lead-containing glass, which can be made into top-grade crystal with smooth finish. Glass, suitable for tableware and decorations; 3. Colored glass, various metal oxides, added to the glass, can be obtained in various colors of glass.
Cosmetic containers, 80% are lightweight disposable bottles. Advanced technologies, such as precise control of raw material composition, precise control of melting process, small mouth pressure blowing (NNPB), cold and hot end spraying of bottles and tanks, and on-line detection, are the fundamental guarantee for realizing lightweight of bottles and tanks. Some countries are developing new surface enhanced technologies for bottles and cans, trying to further reduce the weight of bottles and cans. A German company coated a thin layer of organic resin on the wall of the bottle to produce only 295 grams of 1 liter concentrated fruit juice bottles, which can prevent glass bottles from scratching, thereby increasing the pressure of the bottle by 20%. The popular plastic film label is also conducive to the lightweight of glass bottles.
Glass cosmetic containers are very common packing containers. As early as 3000 years ago, it was used for storing goods. It is a kind of packaging material with a long history. It has the following advantages.
1. transparent and excellent barrier properties.
2. Heat resistance, washing resistance, high temperature sterilization, low temperature storage and good weather resistance.
3. Rich source of raw materials, good formability, easy processing, flexible variety shape, recyclable and reusable.
4.Non-toxic, tasteless, hygienic and clean
5.Chemical stability is excellent.