These are the three steps involved in making any plastic bag:
- Raw Materials
- Extruding Plastic Film
- Printing Bags
- Bag Making or “converting”
Blending and Mixing Resins
Clear LDPE (low density polyethylene) plastic resin in pellet form is vacuum fed from storage silos and blended with various additives as required for specific product applications. These mixes transform the plastic polymer to improve their basic mechanical, physical and chemical properties into a commercial product.
Additives combine to create the desired proprietary blends of clarity, strength, stretch ability, seal ability, scuff and tear resistance, UV protection, bacterial protection, surface appearance, slip resistance and other properties required for the finished product. If colored film is to be made, colored pellets (called “Master Batch”) are added in blends from 1% to 25% to achieve different opacities and virtually any color imaginable. Numerous resins, both LDPE, and Linear LDPE, are kept in stock to allow for the many diverse applications that are manufactured daily.