Food packaging bag technical requirements and formula
Packaging bags are the most commonly used containers in daily life, and various packaging bags are also confusing. Then you can't just look at the appearance of the bag. Today, the professional flexible packaging manufacturing Dongguan City special packaging to come to the food packaging bag packaging technology requirements and food packaging bags commonly used formula, provide a valuable reference for you in the process of customizing food packaging bags.
First, the requirements of food packaging bags for packaging film
1, the packaging film should meet the national standards, can not be shoddy
Food companies must first figure out what materials they need for their food packaging, and secondly, look for formal, professional packaging companies for custom processing. Due to the lack of expertise in packaging materials or simply pursuing low prices, some food companies may be fooled from time to time. Taking food composite bags as an example, many food companies are used for vacuum packaging. The materials of such food packaging bags must have at least one layer of nylon packaging, but there are some composite bags on the market to cut corners, no nylon materials, but the use of poly Ester plastic (PET) because nylon is twice as expensive as PET. The result is that the food packaging bag is very brittle, not soft, and the puncture resistance is weak, causing air leakage and bag breakage in the food packaging, and the economic loss and negative impact on the food enterprise are much higher than the low-cost purchase bag saving. the cost of.
Another seven-layer co-extruded packaging bag of new packaging materials should have at least two layers of nylon. However, there are many packaging bags on the market, and the nylon content is low, and some use smuggled garbage materials. These bags have poor barrier properties, are easily broken, and are not resistant to high and low temperatures. At present, there are cases where aluminum foil bags are sold to food enterprises in the market, and it is also necessary to identify them in time to prevent being deceived.
2, food packaging bags should meet food safety and quality requirements
Food enterprises should require packaging bags manufacturers to use packaging films that meet national standards. For example, the production materials of composite bags should be green and environmentally friendly. Dry composite plastic bags containing harmful substances such as benzene should not be used to avoid contamination by solvent. food.
The food packaging bag should be flat, free of scratches, burns, air bubbles and wrinkles, without a virtual seal. Leveling is not only a matter of aesthetics, but also about the quality of the food. If the bag is not flat, the food package for high-temperature cooking or low-temperature freezing is prone to cracking.
Food packaging bags use green materials when printing. The QS standard requires that food packaging bags should not detect benzene solvents that are harmful to human health, but because benzene solvents are 30% lower than environmentally friendly benzene-free and ketone-free solvents, and the vividness and color fastness are good, so This type of material is also used in the printing of small bags, and the problem of contaminated food often occurs.
The production environment of the packaging enterprise that produces the food bag should meet the standard to avoid contamination of the food bag during the bag making process.
3, Dongguan City, special packaging for food companies tailored
Dongguan Beite Packaging has been engaged in the packaging industry for 19 years. It is dedicated to professionalism. Since its establishment, the company has been pursuing the principle of “mutual cooperation, mutual benefit and common development”, constantly improving, making fine and strong. And lead in the flexible packaging industry. Dongguan Bite Packaging Services has customers in many countries around the world. ADIDAS, AAPE, IZZUE, I.T, Calvin Klein, etc. are famous brands with deep cooperation.
At the same time, Dongguan Bite Packaging has four unique advantages:
Reasonable quotation: Dongguan Bite Packaging can give customers the most comprehensive and reasonable quotation according to different materials and different processes.
Exquisite printing: Dongguan Bite Packaging adheres to the fine style. There are a large number of professional masters who have been engaged in color printing for more than 20 years, and professional quality inspectors check the quality of the printed surface, so that every detail of the packaging bag is perfect. .
High efficiency: Dongguan Bite Packaging is good at coordinating the supply chain, and has a complete process from order access to finished product shipment, realizing the efficient state from raw material supply to finished product delivery, saving customers a lot of time cost.
Service in place: Dongguan Bite Packaging is good at capturing the needs of customers, in line with the principle of maximizing customer care, to maximize the cost savings in the selection of materials, to control each production link, only to achieve product satisfaction from 99% Upgrade to 100%.
Second, PP food bag formula
1. Peelable cover film
1 layer: 8um-12um peeling layer (PP, MI=6.5)
2 layers: 40um PP barrier layer
3 layers: bonding layer
4 layers: substrate (such as OPET, OPA, BOPP and aluminum foil, etc.)
2. Food composite packaging bags
1 layer: 40um composite film once built thickness distribution: 3/4/3
Outer layer: 50% LLDPE + 25% LDPE + 25% mLLDPE + PPA
Middle: 72% PP+25% mLLDPE + 3% PPA
Inner layer: 74% mLLDPE + 20% LDPE + 6% PPA
2 layers: 15um PE extrusion coating
3 layers: 20um substrate (BOPP)
3. Co-extrusion cooking pouch
Outer layer: 60% PP (MI = 3), 40% PP (MI = 1.5)
Middle layer: PP (MI=3)
Inner layer: 60% PP (MI = 3), 40% PP (MI = 1.5)
(PP, MI = 1.5 for improved heat sealing and transparency)
4. Bread bag
Outer layer: PP (MI = 1.5) + mLLDPE
Middle layer: PP (MI = 3) + mLLDPE
Inner layer: PP (MI = 1.5) + mLLDPE
5. Paper towel window
mLLDPE + PP, MI=1.5 (>30%)
6. Co-extruded food packaging bags
Outer layer: PP (MI = 3) + mLLDPE
Middle layer: PP (MI = 1.5) + mLLDPE
Inner layer: PP (MI = 3) + mLLDPE
7. Shrink film
Outer layer: PP (MI = 1.5)
Middle layer: LDPE + mLLDPE (>15%)
Inner layer: PP (MI = 1.5)
8. Paper towel wrap film
Outer layer: mLLDPE
Middle layer: PP (MI=3)
Inner layer: mLLDPE
9. Meat product packaging
7-layer structure: mLLDPE/Tie/PA/EVOH/PA/Tie/PP
5-layer structure: HDPE/Tie/EVOH/Tie/PP
10. Self-venting microwave food bag
1 layer: 65um composite: 1/2/1
Outer layer: LLDPE + LDPE
Middle layer: 50% PP, MI=1.5+35% mLLDPE + LLDPE + 15% white mother
Inner layer: PP, MI=6.5
2 layers: bonding layer
3 layers: 12-15um substrate (PET or PA)
This food bag is self-venting by gas expansion when heating food, which is simple and convenient.