A through hole is being processed in a certain PET bottle with a thickness of 270μm, aiming for an entrance diameter of Φ100μm.
Since the bottle itself is being processed, the diameter on the outlet side cannot be measured. However, based on prior condition checks, a reverse taper hole has been created where the outlet side is wider than the inlet side, and efforts have been made to ensure that the visible hole diameter from the outside is the minimum diameter. Additionally, processing has been carried out on the outer peripheral area, referencing the actual leak testing machine, to be confirmed during visual inspection.
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basic information
Polyethylene terephthalate has excellent heat resistance, but when used in PET bottles, its heat resistance decreases. Even with ultra-short pulse laser processing, which has minimal thermal impact, the processing was challenging. In this experiment, the processing personnel repeatedly tried different approaches and succeeded in creating clean holes with burr-free edges. Depending on the PET bottle, there may be various factors that affect processability, such as thickness, material composition, and slight variations in thickness due to production lots. While condition verification and trial and error are necessary, reverse taper holes created by ultra-short pulse laser processing, which does not depend on the material, can achieve stable pseudo pinhole processing. Of course, we also accommodate hole processing for high-precision PET and resin products.
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Company information
At Lips Works Co., Ltd., we provide contract micro-fine processing using ultra-short pulse lasers, as well as the design and manufacturing of laser systems. In our contract processing business, we have been quick to engage in the development of industrial ultra-short pulse lasers and have been involved in contract micro-fine processing using these lasers. We specialize in applying fine periodic structures (microtextures) to work surfaces aimed at controlling tribological properties, optical properties, and release/adhesion characteristics. We can accommodate requests from small-scale prototypes to mass production according to our customers' needs. In our system engineering business, we leverage the laser processing technology cultivated in our job shop to provide a comprehensive service from selecting laser oscillators suitable for applications, designing optical systems, devising fixtures and auxiliary equipment, to system integration. We assist in improving the precision and efficiency of the processing required by our customers. As experts in laser technology providing cutting-edge laser processing techniques, we strive to be a valuable resource for our customers, so please feel free to contact us.