00 370 445 51431 blow@flexblow.com

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.

Have any questions?