You use a poly sealer, often an impulse sealer, to create a sealed closure on plastic materials like poly bags by applying controlled heat and pressure for a short duration.
Understanding Poly Sealing
Poly sealing typically refers to the process of heat-sealing plastic films or bags made from polymers (polyethylene, polypropylene, etc.). This method creates a strong, airtight, or watertight seal, essential for packaging various items to protect them from moisture, dust, or contamination. The most common type of poly sealer for individual bags or smaller operations is an impulse sealer, which uses a brief pulse of electricity to heat a sealing bar.
Step-by-Step Guide: Using an Impulse Sealer
Based on how an impulse sealer is used to seal poly bags, the process is straightforward:
- Prepare the Sealer: Ensure your impulse sealer is plugged in and the heat setting is appropriate for the thickness and type of plastic you are sealing. As mentioned in the reference, you'll need to "make sure that the heat is turned up" to the correct level.
- Position the Bag: Bring the open end of the plastic bag or material up to the sealing bar of the impulse sealer. Make sure the area you want to seal is flat and positioned correctly across the heating element.
- Engage the Sealer: "Hold down the impulse sealer" by lowering the top arm or engaging the mechanism. This brings the sealing bar into contact with the plastic and activates the heating element.
- Allow the Seal to Form: Keep holding the sealer down "until there's a seal created." The impulse heat is applied briefly, melting the plastic layers together. Hold the arm down for a moment longer after the heat pulse stops to allow the plastic to cool and solidify, ensuring a strong seal.
- Remove Excess: If necessary, you can "tear off the plastic" below the newly formed seal, especially if working with roll stock or creating multiple seals on a larger piece of film.
By following these steps, you can effectively use an impulse sealer to create durable seals on poly bags and other plastic packaging materials.
