PVDC is the only plastic with high barrier properties to both oxygen and water vapor, and it has unparalleled advantages in odor barrier.
The barrier performance of PVDC to oxygen is equivalent to 1700 times that of LDPE, 1000 times that of PP, 20 times that of PET, and 10 times that of PA (test conditions are 23°C, 1atm, relative humidity 75%RH).
The barrier performance of PVDC to water vapor is equivalent to 20 times that of LLDPE, 76 times that of EVOH-32, 30 times that of EVOH-44, and 190 times that of PA.
The odor barrier performance of PVDC is equivalent to 1,000 times that of EVOH, 500 times that of PA, and 17,000 times that of PP and PE.
The high barrier performance of PVDC to oxygen is not affected by ambient humidity, which has obvious advantages compared with EVOH and PA. The following is the comparison of oxygen transmission rate between PVDC and EVOH-38% at different temperatures and humidity (the barrier properties of PA, PVDC and EVOH are not in the same order of magnitude, so no comparison is made).
|
temperature(℃) |
humidity(%RH) |
EVOH-38% |
PVDC EXP-1 |
| 20 |
65 |
0.035 | 0.056 |
| 2 | 0.011 | 0.008 | |
| 20 |
85 |
0.112 | 0.056 |
| 2 | 0.036 | 0.008 | |
| 20 |
100 |
0.66 | 0.056 |
| 2 | 0.21 | 0.008 |
Destructive experimental comparison results of PVDC composite film and EVOH multilayer co-extruded stretch film:
Experimental conditions: temperature 40℃, humidity 100%
Experimental variety: a low temperature product
Number of experiments: 500 pieces each
|
|
The top and bottom are EVOH multi-layer co-extruded stretch film |
Top PVDC composite film and bottom EVOH multilayer co-extrusion |
The top and bottom films are PVDC composite films |
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|
Metamorphic number |
rate of metamorphism |
Metamorphic number |
rate of metamorphism |
Metamorphic number |
rate of metamorphism |
|
| Day 1 | 85 | 17% | 81 | 16% | 0 | 0 |
| Day 4 | 343 | 68% | 340 | 68% | 0 | 0 |
| Day 6 | 448 | 90% | 442 | 88% | 10 | 2% |
| Day 10 | 487 | 97% | 456 | 91% | 11 | 2% |
Conclusion: The quality preservation effect of PVDC composite film is obviously better than EVOH multilayer co-extrusion stretch film; the upper and lower films must use PVDC composite film at the same time, in order to give full play to the superior high barrier properties of PVDC; PVDC composite film packaging medium and low temperature The product is expected to achieve normal temperature circulation.
VDC and VC copolymers - mainly used in coating and artificial casings PVDC{ VDC and MA copolymers - mainly used in co-extrusion
MA-PVDC, also known as high-barrier PVDC, is equivalent to more than 30 times the barrier performance of PVDC for Plastic Casing.
PVDC complies with the US FDA hygiene standards, and can be widely used in the packaging of chilled meat, cooked meat, products, milk and dairy products, oily food, tea, medicines and other products.
PVDC multilayer co-extruded high barrier blown film
PVDC multi-layer co-extrusion high-barrier blown film is a new type of packaging material with high-barrier MA-PVDC as the barrier layer. Using the characteristics of co-extrusion, MA-PVDC, PE, EVA, PP, PA and other materials can be organically combined Together, the properties complement each other and become a high-barrier packaging material with excellent comprehensive properties. Due to the high barrier properties of MA-PVDC, we can control the oxygen permeability to <1cm3/m2•0.1MPa•d (GB/T1038-2000) and the vapor permeability to <0.7g/m3• according to the needs of users. d (GB/T1037-1987), can replace aluminum-plastic composite film, EVOH co-extrusion film, nylon co-extrusion composite film, etc.
The other three layers can be selected as needed. The structure can be flexibly sealed in the inner layer or the outer layer according to the customer's different requirements for heat sealing fastness. Therefore, the asymmetric structure is more practical.
Application field
• Cooked meat products, dairy products
Oxygen barrier - extended shelf life
Anti-vapor - anti-dehydration, quality and quantity
Anti-odor - keep the original taste
• Chilled meat and seafood
Oxygen Barrier - Extends Shelf Life and Keeps Color Fresh
Anti-vapor - anti-dehydration
Odor resistance - all kinds of cold and fresh products can be in the same refrigerated truck or the same refrigerated container, without odor
• Juice, jelly, canned fruit
Oxygen barrier - anti-oxidative deterioration
Anti-vapor - anti-dehydration
Anti-odor - keep the original taste
• Tea, medicine
Oxygen barrier-anti-mildew, anti-oxidation
Vapor barrier - moisture proof
Anti-odor - keep the original flavor
•Toothpaste, cosmetics
Vapor barrier - keep moisture and prevent dehydration
Anti-odor - retain the original smell
• Grain fresh-keeping bags
Oxygen barrier - mildew proof, insect proof, good food taste
Anti-vapor - anti-moisture
• Oily and puffed food
Oxygen barrier - extended shelf life
Anti-vapor - anti-moisture absorption
• Metal rust proof
Oxygen barrier - anti-oxidation
Anti-vapor - anti-moisture
• other fields
Such as pesticides, etc. have been in the experiment
Environmentally friendly
In the United States, PVDC is considered a safe and non-toxic material and meets FDA standards; in Germany, the government strongly advocates the use of PVDC and has a "green mark"; in Japan, it has been confirmed that PVDC incineration has nothing to do with the production of dioxins. The content of PVDC in the PVDC Shrink Film is about 10%, and the packaging bag can be recycled and granulated for injection molding. Using PVDC can save other materials dozens of times, which has positive energy saving and environmental protection significance.
Compare with similar products
• Compared with PVDC coating film, it has higher barrier properties, no residual solvent, no cracking and peeling.
•Compared with PVDC multi-layer co-extrusion cast film, it has better vertical and horizontal strength, and is more suitable for packaging bags. The product structure can be made into symmetrical or asymmetrical.
• Compared with PVDC dry lamination, it has higher barrier properties, no residual solvent, and is more difficult to delaminate.
•Compared with EVOH, PVA and PA co-extruded films, it has better vapor barrier properties, and its high oxygen barrier properties are not affected by humidity.
•Compared with the aluminum-plastic composite film, it has no pinholes and no cracks. The product can be made transparent or light-proof. We have done a comparative experiment of PVDC multi-layer co-extrusion film and aluminum-plastic composite material for packaging milk. The thickness of MA-PVDC in PVDC multi-layer co-extrusion film is 10µm, and the thickness of aluminum foil in aluminum-plastic composite material is 9µm. If the milk is packaged in the form of Tetra Pak, the quality preservation effect of aluminum-plastic composite material is better than that of PVDC co-extrusion film. If the milk is packaged in the form of Tetra Pak, the quality preservation effect of the PVDC co-extruded film is better than that of the aluminum-plastic composite material. This indicates that aluminum foil cracks inevitably appeared during the packaging and transportation of Tetra Pak, which affected its barrier properties. It can be seen from this that it is the best choice to make Tetra Pak-type packaging aluminum-plastic composite materials, while the production of bag-type packaging (especially three-dimensional bags) PVDC multi-layer co-extrusion film is the best choice. But in any case, among all plastic films so far, only PVDC multilayer co-extrusion films can compete with aluminum-plastic composite films.
new products coming soon
• PVDC multi-layer co-extrusion high-barrier blown Thermoforming Film
The outer layer of the product is PP or PA, and the water-cooling process is under blowing. In addition to maintaining good vertical and horizontal strength, the transparency is comparable to that of cast film. The product can be directly used in low temperature meat production line without compounding.
• PVDC multi-layer co-extruded high-barrier thermal shrink film
This product has the function of heat shrinkage, and is used in shrink-wrapped chilled meat, etc., and can replace the PVDC single-layer artificial casing film.
•PVDC multi-layer co-extruded high-barrier fresh-keeping self-adhesive film
In addition to the thermal shrinkage properties of the product, the outer layer material is self-adhesive.
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