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Recommended Material:
Primary Choice: Polypropylene (PP)
Pros: Excellent chemical resistance, very durable (high fatigue resistance for hinges on lid), good impact strength, and generally lower cost than PET. Can be made in translucent/transparent grades.
Cons: Achieving water-clear transparency is more difficult than with PET; it often has a slight blueish or hazy tint.
Premium Choice: Polyethylene Terephthalate (PET)
Pros: Superior clarity and gloss, very stiff and strong, excellent barrier properties.
Cons: Can be more brittle (impact-modified grades are available), generally higher cost than PP.
Technical Details:
Wall Thickness: Consistent wall thickness (e.g., 1.5mm - 2.0mm) is critical for injection molding to prevent sink marks and warping.
Draft Angles: A minimum of 1-2 degrees of draft on all vertical walls is essential for de-molding without scratches.
Parting Line: Strategically placed to be unobtrusive and not interfere with the stacking function
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