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Turnkey Project Planning
  • Turnkey project for mineral water bottling line [PET]
  • Turnkey project for carbonated drink bottling line [PET]
  • Turnkey project for beverage bottling line [PET, HDPE, PP]
  • Turnkey project for food packaging including preserves, candy, cookies, powder, granules, etc. [PET, HDPE, PP]
  • Turnkey project for daily products including milk, soy milk, vinegar, edible oils, etc. [PET, HDPE, PP]
  • Turnkey project for home use products including lubricants, detergents, shampoo, bosy lotion, etc. [PET, HDPE, PP]
  • Turnkey project for cosmetics and pharmaceutical bottling line [PET, HDPE, PP]
Frequently Asked Questions
Q&A 1

Stretch Blow Molding

Q1 : What are the two steps in the PET/ PP pre-form process?

(1) A pre-form is injection molded.
(2) The pre-form is blow molded into the shape of a bottle.

Q2 : How does a stretch blow molding machine work?

The injection machine first produces the pre-form. The pre-form must then cool and solidify, at which point it is discharged from the mold. The cooled pre-form is then placed in the stretch blow mold machine to complete the bottle.

In this method the pre-form material is PET/ PP.

Q3 : Can you describe the process flow chart of stretching and blowing PET/ PP bottles?

Process Flow of Stretching and Blowing PET/PP Bottles

  1. Pre-form heating.
  2. Pre-form is introduced into the mold and closing unit.
  3. Insert the stretching rod.
  4. Stretching and pre-blowing.
  5. Final bottle blowing.
  6. Mold opens.
  7. Finished bottle discharged from the mold.

Q4 : What equipment do I need for a complete pre-form system?

  • Preform Injection Molding Machine
  • Preform Injection Mold
  • Mold Surface Dehumidifier
  • Preform Conveyor
  • Resin Dehumidifying System
  • Mold Chiller System
  • Air Compressor
  • Air Dryer
  • Precise Filter
  • Cooling Tower System

Q5 : What equipment do I need for a complete stretch blow mold system?

  • Stretch Blow Molding Machine
  • Blowing Mold
  • Mold Chiller System
  • Air Compressor
  • Air Dryer
  • Precise Filter
  • Cooling Tower System
Q&A 2

Injection Blow Molding

Q6 : How do injection blow molding machines work?

The process of injection blow molding is used for the production of hollow glass and plastic objects in large quantities. In the injection blow molding process, the polymer is injection molded onto a core pin; then the core pin is rotated to a blow molding station to be inflated and cooled.

This is the least-used of the three blow molding processes, and is typically used to make small medical and single serve bottles. The process is divided into three steps: injection, blowing and ejection.

In this method, the material is HDPE, LDPE, PP, PVC, PS, ABC, Nylon etc.

Q&A 3

Extrusion Blow Molding

Q7 : How do extrusion blow molding machines work?

In this method material is extruded from the extrusion machine into a tube shape. The material then goes into the mold and closing unit, and air is blown into the mold to force the material tube to expand into the mold wall. The material is cooled until it solidifies when it is discharged from the mold.

In this method, the material is HDPE, LDPE, PP, PVC, PS, ABC, and Nylon etc.

Q8 : What equipment do I need for a complete extrusion blow mold system?

  • Extrusion Blow Molding Machine
  • Blowing Mold
  • Mold Chiller System
  • Air Compressor
  • Hopper Dryer
  • Auto Loader
  • Cooling Tower System
  • Mixer
  • Crusher
Material Information
Material: PETE
Name of Material Full Name Characteristics Packaging Applications
PETE PET Polyethylene Terephthalate
  • PET is clear, tough, and has good gas and moisture barrier properties, resistance to heat.
  • Commonly used in bottles and many food and non-food containers.
  • Stiffness, strength, toughness, ease of processing, and ease of forming.
  • Soft drink
  • Water
  • Sports drink
  • Beer
  • Mouthwash
  • Catsup and salad dressing bottles
  • Pickle, jelly and jam jars
  • Cosmetic bottles
Material: HDPE
Name of Material Full Name Characteristics Packaging Applications
HDPE High Density Polyethylene
  • Unpigmented bottles are translucent, have good barrier properties and stiffness, and are well suited to packaging products with a short shelf life.
  • HDPE has good chemical resistance, it is used for packaging many household and industrial chemicals.
  • Pigmented HDPE bottles have better stress crack resistance than unpigmented HDPE bottles.
  • Liquid laundry detergent
  • Shampoo conditioner
  • Motor oil bottles
  • Milk and juice bottles
  • Yogurt and margarine tubs
Material: V
Name of Material Full Name Characteristics Packaging Applications
V PVC Vinyl Polyvinyl Chloride
  • Poor heat stability, molding and decomposition temperature range are similar.
  • Poor fluidity, poor molding appearance.
  • Corrosive to mold.
  • Most easy to burn and generating acid gas.
  • Good strength, electrical insulation and chemical resistance.
  • Can softened after adding DOP.
  • Poor heat resistance.
  • High sp. Gravity (1.4) has burning resistance; good for printing
  • Different formula has different characteristics. Wide in application range, low price, high impact on environment. Likely to decompose when molding temp isexceeding 190°C and emit corrosive gas of HCI.
 Clear food and non-food packaging
Material: LDPE
Name of Material Full Name Characteristics Packaging Applications
LDPE Low Density Polyethylene
  • High shrinkage, easy to bend and deform.
  • Need cooling time, poor molding yield.
  • Sink will occur to product, need forceful mold releasing.
  • Molding shrinkage is highly affected by mold temperature. Poor stability.
  • Good fluidity, good heat stability, but molecular orientation lead to distortion.
  • Lighter than water, soft.
  • Not heat resistance, adhesive printing.
 Squeezable bottles
(e.g. honey, mustard )
Material: PP
Name of Material Full Name Characteristics Packaging Applications
PP Polypropylene
  • Low fluidity, flow mark appears if filling were poor, when pressure is not enough, easy to have dent, need high-pressure molding.
  • In optical use, transparency is a problem, when mixing with other material; care shall be given to decomposition.
  • Excellent in molding property, mechanical strength is better than PE.
  • Good water, chemical resistance and electrical insulation.
  • Easy to distort, deform and dent.
  • Adhesive, the lightest plastic.
  • Low Sp. Gravity (about 0.90), FDA grade, good, transparency, not moisture absorption, low price, heat resistance and normal mechanical strength are poor, low foaming percentage, poor for printing.
  • Catsup bottles
  • Yogurt containers
  • Margarine tubs
  • Medicine bottles
Material: PS
Name of Material Full Name Characteristics Packaging Applications
PS Polystyrene
  • Of ethylene family, general plastic resin.
  • Good fluidity, good molding yield and molding property.
  • Easy to break, not good impact resistance.(GPPS)
  • Easy to have trim.
  • Colorless, transparent, easy to be dye, good insulation.
  • Good in water resistance and chemical resistance.
 Aspirin bottles
Other Material
Name of Material Full Name Characteristics Packaging Applications
OTHER  

Use of this code indicates that the package in question is made with a resin other than the six listed above, or is made of more than one resin listed above, and used in a multi-layer combination.

 Dependent on resin or combination of resins
 
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