Vacuum forming technology is one of the most commonly used forming methods in plastic packaging, which is a forming technology that uses thermoplastic sheets as the forming object.
Although vacuum molding technology was developed in the early 20th century, it was still heavily applied in industrial production in the 1960s. Through continuous development and change, the vacuum molding process has now achieved high automation and mechanization.
Through continuous improvement of the molding equipment, the technical difficulties of temperature control and transmission mode of the molding machine have been improved, and the process technology of high tensile and high-precision molding products has been solved, including the inability to solve the processing technology problems of different plastic materials and thick sheet materials. Below is a brief introduction to the vacuum forming process and its related technologies.
At present, the commonly used vacuum forming materials in the industry are mainly PET, PS, PP, and PCR recycled materials.
In high-end vacuum forming packaging, flocking or planting plastic sheets are also commonly used, and some ABS and PC materials are also used. In some special industries, anti-static plastic sheets, gold-plated and silver-plated plastic sheets, etc. are also used.
With the increasing attention to environmental issues, biodegradable plastic sheets, such as polylactic acid (PLA) plastic sheets, have also been added to the ranks of vacuum forming materials and play an important role in the environmental protection industry.
The processing thickness of plastic sheets can range from 0.3 to 3.0 millimeters. Especially for PET products, their high transparency, uniformity, impact resistance, and precision have been improved.
At the same time, they have overcome the technical problem of zero degree demolding in vacuum molding, expanding the application fields of vacuum molding technology.
In the development of materials with high and low temperature resistance, the technical bottleneck of maintaining non deformation, non collapse, and non brittle cracking of vacuum formed pallets in high and low temperature environments has been solved, which can meet the packaging protection requirements in various extreme weather conditions.
