After the plastic packaging bag is ready to install the product to seal before it can be put into the market use, so when the seal should pay attention to what, how to seal the mouth of the firm and beautiful? No matter how good the packaging bag is, bad sealing will also affect the appearance of the packaging bag. So what should we pay attention to when we seal the plastic bags?　　　　

 

　　　

　　

1: sealing method of single-layer plastic packaging bags

 

 

 

Ordinary plastic packaging bags are single-layer, so the bag is thin, low temperature can seal, the temperature will be high after the bag was burned, so in the sealing time must be repeated test temperature, until the temperature will not burn the bag and the bag surface is flat, such a temperature is the right temperature. Usually such bags are sealed by foot.

 

 

 

2: sealing method of multi-layer composite packaging bags

 

 

 

Multilayer composite plastic bags because it is a multi-layer material combination, the bag is thick, and the ability that PET is high temperature resistant, so the bag can bear high temperature, to achieve the high temperature of 200 degrees can usually sealed bag, bag, of course, the thicker the temperature to the higher, the packaging must be tested when ready to batch of sealing, avoid unnecessary trouble in use process.

 

 

 

The sealing of plastic packaging bags is the most important is the temperature control, the temperature control of the sealing smooth, beautiful, will not damage, so when the sealing must test out a suitable temperature, must not rush to mass production, to avoid waste.