bag taken ratio
The ratio of the number of successful bag to the total number of bag
The bag rate of packaging machine should not be less than 99%
bag opened ratio
The ratio of the number of bags opened to the total number of open bags
The opening rate of the packaging machine should not be less than 99%
bag damaged ratio
The ratio of the number of damaged bags to the total number of bags under normal operating conditions
The bag damag rate should not be than 1%
net weight
Actual of after removal of packaging containers and other flexible packaging materials
Note: Regardless of the packaging material of the product or any other material packaged with the product, it is not recorded as net
| Precision of net weight | ||
production capacity
he number of finished products produced per unit time hen the packaging machine is in stable production
qualified packaging case ratio
Under the condition that the net is qualified, the ratio of the number that pass the appearance quality, heat seal strength, sealing and drop test to the total number should not be less than 98%
Working conditions
The pressure of the compressed air source supplied by the control system should be 0.5MPa~0.8MPa.
The deviation between the supply voltage and the rated voltage should be kept within the range of -10%~+5%
The temperature of the work room should be 5℃~35℃, the relative humidity should not be than 70% and the altitude should not be r than 1000m.
ppearance quality
The sealing of the packaging of the packaging machine should be smooth, the indentation or embossing should be clear and there should be no wrinkles, burning and The production date, production batch number and anti-channel conflict label of the packag should be clear and firm, and the printing position should be consistent he of the sealing width of the pre bag should not be than ±2mm.
eat sealing strength
The heat-sealing parts of the packag should be made of materials that are easy to be heat-sealed and the heat-sealing strength should meet the value listed in Table 2.
| Note: The material thickness ed in the table refers to the thickness of the heat sealing layer material | |
The pre bag should and there should be no water or foreign matter inside or outside the bag.
b)There should be no adhesion between pre bags
c)
d)
e)
f)In the process of clamping, straightening and heat sealing, the pre bag filled with materials should prevent material overflow affecting the sealing quality and there should be sufficient transition space in the bag.
Three common types of sealing bags and their application
Threeside sealing bag
Our common snack foods, rice, tea, facial masks, etc. in supermarkets are usually packaged in three-side sealed bags. In terms of bag types, three-side sealed bags are the simplest and most common. Its style is sealed on three sides and one side is open, leaving only one opening for users to products. Its advantages are: good air tightness, excellent moisturizing and sealing performance; high barrier degree, extremely low oxygen and moisture permeability; strong ability to prevent moisture and mildew; bright and beautiful appearance, non-toxic and tasteless It can be expanded into a three-dimensional bag shape and the space utilization rate is high
In addition to the points mentioned above, the three-side seal bag is highly expandable and can be customized according to needs. Resealable zippers, easy-open and hanging holes for shelf display can all be implemented on the three-side seal bag.
2. Back sealing bag
The back-sealed bag is also called pillow bag and middle-sealed bag. The bag consists of three seams on the top, bottom and back to form a pillow shapeThe back-sealed bag adopts a hidden longitudinal sealing edge, which ensures the integrity of the front pattern of the package to the greatest extent. In the process of packaging design, the bag pattern is as a whole to keep the picture coherent, exquisite, and the appearance is distinctive. The seal of the back-sealed bag is on the back, the pressure bearing capacity of both sides of the bag is stronger, and the possibility of packaging damage is greatly reduced. he packaging bag of same size the total sealing length of backsealing is the smallest, which will reduce the probability of the seal cracking to a certain extent. Finally, the back seal bag can effectively reduce the cost of packaging materials and the consumables is small. It can reduce the consumption of packaging materials by about 40% without affecting the production speed and the cost advantage is obvious.
And its inherent advantages of moisture-proof waterproof, insect-proof and scattering make the back seal bag widely used mainly used for product packaging storage of medicines, cosmetics, food, frozen food, etc.
3. Four-side sealing bag
After the four-side sealing bag is formed into a bag, four sides are heat-sealed sually a whole piece of packaging film is divided into two halves. Controlling the alignment of one side during production can achieve a good packaging effect. Therefore, in terms of packaging materials and production equipment, it has high adaptability and stability. The four-side sealing bag a cube shape pack roduct and the packaging effect is good. It can be used for food preservation and is suitable for multiple recycl. Using the new printing process, the packaging pattern and trademark can be more prominent and the visual effect is outstanding. The four-side sealed bag is resistant to cooking, moisture-proof and vacuuming . In addition to the characteristics that other packaging bags can also have, its strong anti-oxidation, anti-static and other characteristics can better protect the product from damage due to external environmental factors efficien xtend shelf life.