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PET bottles are widely used in the packaging industry for various beverages, personal care products, household items, and more. These bottles offer numerous advantages that have contributed to their popularity and widespread use.
The development of the PET bottle production process has witnessed remarkable advancements over the years. PET bottles have become the preferred choice for packaging various beverages, personal care products, and household items due to their lightweight, durability, clarity, and recyclability.
Material Development:
The journey of PET bottle production began with the development of PET as a suitable material for packaging. Researchers and scientists worked on enhancing PET's properties to meet the specific requirements of bottle manufacturing. This involved improvements in PET resin purity, molecular weight distribution, and thermal stability to ensure optimal performance during the production process and throughout the bottle's lifecycle.
Injection Stretch Blow Moulding (ISBM):
The injection stretch blow moulding (ISBM) process emerged as a significant development in PET bottle production. ISBM involves two main stages: injection moulding and stretch blow moulding. In the injection moulding phase, PET preforms are produced using injection moulding machines, which shape the molten PET into a preform with a neck finish. The preforms are then transferred to stretch blow moulding machines, where they are reheated, stretched, and blown into the final bottle shape. ISBM offers superior control over bottle design, wall thickness, and dimensional accuracy.
Preform Design and Optimization:
The design and optimization of PET preforms have played a crucial role in the development of the production process. Manufacturers focus on achieving the desired bottle characteristics by tailoring preform designs to specific bottle shapes and sizes. This involves optimizing the geometry, wall thickness distribution, and material distribution within the preform to ensure consistent bottle quality, structural integrity, and production efficiency.
