The main advantages of vacuum packaging products
The main advantages of vacuum packaging are saving raw materials, light weight, convenient transportation, good sealing performance, and meeting the requirements of environmentally friendly and green packaging;
Can package any irregular products without the need for additional cushioning materials for packaging; The packaged products are transparent and visible, have a beautiful appearance, are easy to sell, and are suitable for mechanized and automated packaging, facilitating modern management, saving manpower, and improving efficiency.
Production equipment and process of vacuum packaging
The vacuum packaging equipment mainly includes:
Vacuum forming machine, punching machine, sealing machine, high-frequency machine, folding machine.
Hot forming process flow:
Plastic sheets – cutting – sheet fixation – heating – forming – demolding – edge removal – finished product
Material requirements for vacuum forming
- Vacuum forming can only produce products with relatively uniform wall thickness (usually slightly thinner at the chamfer), and cannot produce plastic products with significantly different wall thicknesses
- The wall thickness of vacuum forming is generally within the range of 1 to 2mm or thinner (the most commonly used thickness for small packaging using vacuum packaging sheets is 0.15 to 0.25mm)
- The stretching degree of vacuum formed products is limited to a certain extent. The diameter to depth ratio of vacuum formed plastic containers generally does not exceed 1, and in extreme cases, it should not exceed 1.5
- The dimensional accuracy of vacuum forming is poor, and its relative error is generally above 1%.
