The heat sealing position of vacuum food packaging bag is uneven in the process of bag making
1. Cause: improper temperature control. Solution: 1. The temperature of heat sealing tools should be uniform, and the difference should not exceed ± 5 ℃. ② Check: the sensitivity of the temperature controller should not be greater than 5 ℃.
2. Causes: uneven heating pressure solution: 1. Heating tools and liner surface should be parallel, contact food packaging bag to keep clean. ② The thickness error of thin film should be small.
Packaging bag knowledge: Why are there more composite food packaging bags now?
With the increasing demand for plastic flexible packaging, all kinds of color printing composite bags are covering the market according to their inherent characteristics of gorgeous color, novel pattern and convenient use. The original food packaging bag because of its inherent advantages and disadvantages, can not meet the requirements of today's more and more commodities and more demanding food packaging bags. Therefore, it is necessary to combine two or more kinds of films or materials with different properties to learn from each other to fully meet the requirements of food packaging. This kind of bag made of food packaging materials made of multilayer different materials is also called composite bag. Food packaging generally requires the use of composite bags.
Composite bag has excellent barrier performance, excellent pasteurization resistance, cold storage and other characteristics, is the first choice to achieve food packaging. The composite bag can be used for the food packaging of various liquid drinks such as jelly, sour milk, beverage, jam, etc., or the packaging bag for granular and powdery food such as milk powder, candy, etc. Food packaging bags are usually printed in copper plate. Inside printing refers to that the ink is printed between two layers of materials. In other words, our food and hands can not touch the ink. This is obviously a guarantee for the safety of food packaging. This is actually one of the advantages of using multilayer composites. http://www.dgbpk.com/
Dongguan Beite packaging materials Co., Ltd
Dongguan special bag, plastic bag, plastic bag, plastic bag