HDPE, High Density Polyehylene

HDPE, high density polyehylene

characteristic

1. Color: translucent

2. Impact resistance, cold resistance is also very good

3. Water resistance, good chemical resistance, water vapor and air cannot pass through the tape

4. The surface of the molded product is soft, melts at 125 degrees Celsius, burns to produce wax odor, and does not generate smoke

Formability

Formability: Keep the plastic at a humidity below 0.01%. It is best to dry all plastics before processing to avoid cracking during processing.

Recommendations for processing and forming conditions

Humidity: Keep it below 0.01-0.02%, use a hot air dryer to dry it before forming it (60 degrees Celsius, 2 hours)

Plastic processing temperature: 150-260 degrees Celsius

Mold temperature: mold temperature 30-70 degrees Celsius

Injection pressure: 350-1400kg/cm2

Usage description

1. Containers (beer crates, crops, plastic crates, etc.)

2. Bottles (small bottles, lamp oil cans, large bottles, drum-shaped cans)

3. Daily necessities (buckets, baskets, toys, kitchen supplies)

4. Tape (reinforced tape, ultra-thin tape, shopping bag)

5. Pipes (large and small pipes)

6. Rope belt (extension belt, rope, fishing net cloth)

7. Others (pallets, traffic signs, stationery, etc.)

Processing method

Shrink and warp

1. Change the gate position

2. Reduce mold temperature

3. Increase cycle time

4. Increase or decrease the rate of fire

Scorching, discoloration

1. Enlarge the vent

2. Reduce the rate of fire

3. Change the gate position

4. Lower the molding temperature

5. Enlarge the nozzle opening

6. Increase gate size

Burrs

1. Increase the clamping pressure

2. Reduce injection pressure

3. Determine if the plastic is dry

4. Reduce the rate of fire

5. Lower the melting temperature

Molded product sticky mold

1. Check the undercut of the mold

2. Reduce injection pressure

3. Determine if the plastic is dry

4. Reduce the rate of fire

5. Lower the holding pressure

6. Reduce screw advance time

7. Reduce cycle time