Garbage Bags Manufacturer FAQ
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| Garbage Bags Manufacturer How are garbage bags manufactured? Garbage bags go through an interesting process when they are produced. Garbage bags are made from resin that feeds into an extruding machine. As the resin is fed through a heated screw, it is forced to mix and melt to a liquid state. The screw forces the melted resin through a die forcing it into a tube.
Blowing air through the center of the die ring expands the tube, sometimes called a bubble (much like blowing up a balloon). The amount of air and speed in which the tube travels up a tower determines the size and thickness of the plastic. The bubble travels up a tower to cool the melted plastic.
Once cooled, the bubble is flattened and travels down the tower through a set of rollers. When the plastic reaches the bottom, it is wound on a large roll.
If the plastic is to be printed, an additional step is done during the extrusion process. The plastic film is electrostatic ally treated. This places little dents in the plastic’s surface allowing ink to stick to the plastic. During the printing process, the equipment determines how many colors it is capable of printing. The colors are applied one at a time beginning with the lightest color. The inks are capable of drying very fast. However, some heat is applied to speed up the drying process.
Converting or bag making is the process of turning the roll of plastic, printed or plain, into a bag. The equipment used is capable of very exact repeat lengths. You often will see a mark on the edge of the printed bag, which is sometimes called the bug mark. This mark is detected by an electric eye, which causes the machine to cycle so the bag may be made.
Most plastic bags are side-welded by applying a hot knife to the plastic. It then melts, separates and seals both the front of one and the back of the next bag. This knife varies in temperature depending on the thickness of the plastic bag.
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Garbage Bags Manufacturer FAQ |
