Under what circumstances does the PET plastic bottle blowing process have an excellent product?

INFORMATION SUMMARY: Many of the previous tweets introduced  PET plastic raw materials.With suitable raw materials, what kind of technology and environment are needed to produce good products better?

 

 

1. AUXILIARY MACHINE AND MOLD

 

Auxiliary equipment mainly refers to equipment that maintains the constant temperature of the mold. The consistent temperature of the mold plays a vital role in maintaining the stability of the product. Generally, the temperature of the bottle body is high, and the temperature of the bottle bottom is low. For the cold bottle, since the cooling effect at the base determines the degree of molecular orientation, it is better to control the temperature at 5-8°C. In contrast, the temperature at the bottom of the hot bottle is much higher.

The mold is an essential factor affecting the PET bottle blow molding process. The quality of the mold shape will reduce or increase the difficulty of process adjustment. For example, the ribs, the curvature of the transition zone, and the heat dissipation condition of the bottom will all affect the process adjustment.

 

2. ENVIRONMENT

 

The quality of the production environment also has a more significant impact on process adjustment, and constant temperature conditions can maintain process stability and product stability. Blow molding of PET bottles is generally best at room temperature and low humidity.

 

 

3. OTHER REQUIREMENTS

 

The pressurized bottle shall meet the requirements of the stress test and pressure test at the same time. The stress test is the internal quality control to prevent the degradation of the molecular chain during the contact between the bottom of the bottle and the lubricant (alkaline) when the PET bottle is filling the beverage, and the cracking, leakage, etc.; the pressure test is to prevent the bottle from being filled Quality control for bursting after entering a certain pressure of the gas. To meet these two needs, the thickness of the center point must be controlled within a specific range. Generally, the center point is thin, the stress test is better, and the pressure resistance is insufficient; the center point is thick, the pressure test is better, and the stress test is flawed. Of course, the stress test results have a lot to do with accumulating materials in the transition zone around the center point, which should be adjusted based on experience.

 

 

4. CONCLUDING REMARKS

 

The adjustment of the PET bottle blow molding process is carried out for the corresponding material. If the material is not good, the process requirements are stringent, and it isn't easy to blow out qualified bottles.

 

 

Yangjiang Hengmao Packaging Products Co., Ltd. Focuses on the customized production of food-grade plastic bottle packaging and has a one-stop automatic production line from raw materials-finished products-packaging to ensure food safety, stability, and controllability. It is a long-term partner of several well-known domestic food companies such as Chubang Food, Jiahao Food, Shenghetang Food, and Tianhe Food. Welcome to customize all kinds of pet plastic bottles. For packaging, look for Hengmao, professional and more reliable!