HDPE bottle conversion to PET
CUSTOMER:
Famous electronic appliance producer for their off-centered neck oval-shaped trigger spray bottle.
TASK:
Help the customer increase chemical resistance by replicating their HDPE bottle in PET.
CHALLENGES:
⦁ Achieve complicated geometry with sharp edges
⦁ Achieve matching color and guarantee its consistency
⦁ Ensure even bottle weight distribution with off-centered neck
⦁ Optimize the bottle weight to increase eco-friendliness
⦁ Guarantee stable bottle base to avoid rocking effect
SOLUTION:
⦁ Bottle drawing was developed by our engineering team to match preform stretch ratios
⦁ Custom masterbatch was created
⦁ Comprehensive preferential heating was used for weight distribution consistency
⦁ Smaller neck size was chosen to cut down the bottle weight: 28 mm instead of 38 mm
⦁ Additional bottle base cooling was used to stabilize it after blowing
TECHNOLOGY USED:
FlexBlow2 with preferential heating.
PET advantages over Other Plastics
PET is choosen by extrusion blow moulders over other plastics due to these reasons:
- 30% lower producing cost;
- 4 times higher production capacity;
- 15% cheaper to recycle;
- Better impact resistance;
- Better resistance to UV aging;
- Better resistance to thermal aging;
- Better strength under cold conditions;
- PET fibres are bulkier than PP fibres;
- Most commonly used on the market.
