The design of the cosmetic bottle preform is good or not, it will not only be related to the final molding of the cosmetic bottle, but also the manufacturing cost that affects the manufacturing cost. Next, let the PET cosmetic bottle manufacturer Yello Packaging reveal the design of the cosmetic bottle preform.
What is the cosmetic bottle preform? The cosmetic bottle preform is PET and other materials. When making plastic cosmetic bottles, the raw materials are filled in the mold under specific temperature and pressure, and the semi -finished products are processed by injection. It is necessary to correct an industry error cognition here. Most people always call the "bottle preform" as "bottle embryo". This is wrong. The correct statement should be "bottle preform".
When the bottle preform is designed, the two principles should be followed. One is the larger the stretch ratio, the better the thickness of the product wall; the second is the thinner wall thickness, the shorter the production cycle of the bottle, the lower the production cost. The longitudinal stretching ratio of PET flat bottle and eccentric bottle is 1.5-1.7 times, and ordinary fine-tacit round bottles can be designed between 1.5-2.5 times, and the wide-mouth bottle and thin-walled bottle can reach 2.5-3.0 times. The wall thickness design is generally 2.3-4.5mm. It is appropriate, and those who have special requirements for individual bottles can reach 5.5mm.
In addition to the tensile ratio and wall thickness, the bottle preform should also pay attention to the taper when designing. The PET small port bottle blankness is 0.75 ° -2 °.
If you want to design a beautiful and appropriate plastic cosmetic packaging bottle, the choice of craftsmanship and materials is very important, and the design of bottles is also important.
