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EVOH Barrier film oxygen transmission rate testing

Oxygen transmission rate (OTR) is the measurement of the amount of oxygen gas that passes through a substance over a given period. It is mostly carried out on non-porous materials, where the mode of transport is diffusion, but there are a growing number of applications where the transmission rate also depends on flow through apertures of some description.

  • Brand:

    GBPI
  • Item NO.:

    Oxygen Transmission
  • Product Origin:

    Guangzhou China
  • Shipping Port:

    Huangpu Guangzhou
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Product Detail

What affects the OTR of films



Good oxygen barrier is achieved by combining functional layers to create a film with the required barrier, as well as those other properties necessary to produce a serviceable package. For example, EVOH has exceptional OTR properties, but needs moisture barrier and mechanical properties provided by layers that are coextruded or laminated around it.



OTR is most affected by the following factors.



1. Thickness of barrier layer: Generally, the thicker the oxygen barrier-providing layer, the better the barrier. But there are process and cost limitations that restrict the thicknesses that can be realistically produced or successfully utilized.



2. Copolymer ratio, plasticizer content, and polymerization process: All PVdCs (or EVOHs or PVOHs) are not created equal. Properties are compromised during polymer and product development, so that total performance in target applications is optimized. There can be substantial differences in OTR values depending on the selections made. For example, both ASB-X and AXT are PVdC-coated and sealable, but their OTRs are 4.5 cc/100 in2/24 hr and .40 cc/1 00 in2/24 hr, respectively. ASB-X has the poorer OTR, but a broader seal range than AXT.



3. Base film surface compatibility: The physical and chemical characteristics of the base film surface have a major effect on the OTR after metallization, and to a lesser degree, after coating. This is evidenced by Met PET's exceptional barrier, as well as the difference in OTRs between various metallized OPP products (refer to Table 10).


So how to measure the films oxygen transmission rate?



GBPI Overall packaging testing instruments help you find out the answer.

GBPI R&D latest packaging testing equipment for packaging industry.We develope latest Y110 and Y310 Oxygen Permeability Tester for packaging material Oxygen Transmission Rate Testing.



Comply to ASTM standard test methods include:


D3985 Standard Test Method for Oxygen Gas Transmission Rate Through Plastic Film and Sheeting Using a Coulometric Sensor

F1307 Standard Test Method for Oxygen Transmission Rate Through Dry Packages Using a Coulometric Sensor

F1927 Standard Test Method for Determination of Oxygen Gas Transmission Rate, Permeability and Permeance at Controlled Relative Humidity Through Barrier Materials Using a Coulometric Detector

F2622 Standard Test Method for Oxygen Gas Transmission Rate Through Plastic Film and Sheeting Using Various Sensors

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It with corrosion resistance, anti-high-low temperature, no leakage and other advantages. c. With SSR (solid relay)output control, without noise, reliable working, long service life time, fast switching, low interference from outside, and easy operation etc.. Rain system.   it consists of nozzle, solenoid valve, water-supplying and connecting pipe. Lighting system. It consists of xenon lamp, lamp cover, lamp contactor and other controlling parts. Energy compensation is got by adjusting samples distance, pressure and current. 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Air circulation section Cycling channel and winding machine inside the chamber, it uses the high efficiency cooling machine and energy adjusting system, efficiency heat exchange to reach the aim of temperature change, which also improves the airflow and heat exchange between airflow, heating and humidification, as a result, it improves the humidity uniformity in the working room. 8. Enclosured files: operation manual, warranty card 9. Machine running requirements Temp. 5℃~+32℃ Humidity ≤85% Power supply AC220(±10%)V/50HZ    10. Core components parts Remark: replacement of some small parts of the same quality is possible because of material shortage.    
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