The reasons why most skin care products on the market use plastic containers are mainly the following: light weight, convenient storage and transportation, easy to carry and use; good barrier and sealing properties, high transparency; good processing performance, various sizes, specifications, and shapes are available; instructions, barcodes, anti-counterfeiting labels, etc. are easy to color and print, and will not fall off; good chemical stability and hygiene. Plastic is a polymer synthetic material with a wide variety of advantages.
1. Good mechanical properties, light weight, convenient storage, easy to carry and use; ) Good barrier and sealing properties, high transparency; ) Good processing properties, can manufacture bottles, caps, films, bags and composite packaging materials of various sizes; good decorative coloring and printing properties. Drug logos, instructions, labels, and barcodes can be directly printed on inkjet or plastic materials without falling off; Good chemical stability, weak toxicity, hygiene and safety. Medicine caps can be used as insurance caps, pressure caps, anti-counterfeiting labels, etc. The disadvantages of plastic packaging containers are that they are prone to static electricity, the surface is easily contaminated, waste causes environmental pollution, and it is difficult to recycle.
2. However, plastic containers also have limitations. Plastics are not very heat-resistant, have limited light blocking properties, are easily contaminated on the surface, and are more troublesome to recycle. For some cosmetics or those that are volatile and easy to emit fragrance, plastic containers are not a better choice.
3. Compared with plastics, glass materials have the following market advantages in terms of light resistance, heat resistance, and
solvent resistance: good transparency, the material body is clearly visible; good barrier properties, can provide good shelf life conditions; good temperature tolerance, can be stored at low temperatures; rich raw materials, can be recycled, and are pollution-free to the environment; good chemical stability, odorless, clean and hygienic.
In this way, glass packaging is indeed much better than plastic, but glass also has defects. Not to mention the large mass, the disadvantage of being fragile alone requires higher costs in processing and transportation, which will also affect the overall price of skin care products.
Cosmetic glass bottles: Glass bottles are traditional packaging products with a transparent gloss, good chemical stability, airtightness, and easy molding, but they are heavy and easy to break. 80%-90% of glass packaging containers are glass bottles and cans. The density of the commonly used sodium-lime glass bottles is /cm3, which is brittle and has low thermal conductivity. Using metal ion colorants, emerald green, dark green, light blue, and amber glass can be made.
Advantages of glass packaging containers:
1) Good chemical stability, non-toxic and odorless, hygienic and clean, no adverse effects on packaging
2) Good barrier properties, can provide good quality assurance conditions;
3) Good transparency, the contents are clearly visible;
4) High rigidity, not easy to deform
5) Good forming and processing properties, can be processed into a variety of shapes;
6) Good high temperature resistance, can be sterilized at high temperature, and can also be stored at low temperature;
7) Rich raw materials, can be recycled, and no pollution to the environment.
Disadvantages of glass packaging containers;
1) Brittle and easy to break
2) Heavy weight, high transportation costs
3) High energy consumption during processing, serious environmental pollution;
4) Poor printing performance.