The 1st Corporate Partner of WPO (World Packaging Organization) Labthlnk* I Oxygen Transmission Rate Test System
Open the catalog to page 1The 1st Corporate Partner of WPO (World Packaging Organization) 6 Package test accessories
Open the catalog to page 2Basic knowledge Barrier property and permeability of packaging In brief, barrier property of materials refers to the barrier performance of material against permeation substances. Barrier property of packaging means the capability of package that prevents specified permeable substance transmitting from one side to the other (from high to low), such as gases, moisture, flavor, etc. and protects contents from degradation in quality or function loss. Inverse, when we say a material or package has a particular 德国 gas permeability it gives us an idea about the amount of gas molecules that pass through...
Open the catalog to page 3Basic knowledge Labthink' The 1st Corporate Partner of WPO (World Packaging Organization) Oxygen, carbon dioxide, moisture, and other gases in the air have a major impact on the freshness and quality of foods, medicines, cosmetics and other products. Oxygen oxidizes many of the compounds in food, destroy nutrition, and cause food smelly and spoilage. Moisture influences the taste, texture, weight, also speeds up browning reaction and pigment oxidation. Oxidation and hydrolysis are the important reasons which cause invalid medicine and instability of medicine. Anti-oxidation and moistureproof...
Open the catalog to page 4Basic knowledge At molecular level, plastic materials are formed by a long polymer chains, as known as “molecular ball”. These ball-like chains present voids, where other molecules may pass through the packaging’s material. Obviously, these voids are not so big, so they will let more easily the little molecules pass, such as oxygen, water vapor, etc. Higher molecules, such as those forming scents, will diffuse with more difficulties through the polymer’s structure. This image shows a rendering (gray and pink) of the molecular structure of a po
Open the catalog to page 5Basic knowledge labthlnk* SThe 1st Corporate Partner of WPO (World Packaging Organization) Sorption Desorption From microscopic view, the permeation process includes the following steps as shown in the above figure: a. Gas molecules reach the film surface and accumulate; b. Absorption in the material takes place c. Gas molecules reach absorbing equilibrium on the high concentrated side of the film surface; d. Due to the concentration gradient, gas molecules diffuse toward the other side of the film. Diffusion equilibrium will be reached after a certain time;
Open the catalog to page 6labthlnk* SThe 1st Corporate Partner of WPO (World Packaging Organization)
Open the catalog to page 73 Test principle and standards Labthink' The 1st Corporate Partner of WPO (World Packaging Organization) The test principle is that pre-conditioned specimen is mounted as a sealed semi-barrier between two chambers. One chamber flows with test gas (usually is pure oxygen or air) and the other chamber is slowly purged by a stream of carrier gas (usually is N2). The pressures on both sides are equal, but the concentrations of oxygen are different. Due to concentration gradient difference between two chambers, oxygen molecules permeate through the specimen into the carrier gas side and are taken...
Open the catalog to page 83 Test principle and standards 1 Flow control valve 6 Overall temperature control 9 Labthink oxygen sensor
Open the catalog to page 9Labthink The 1st Corporate Partner of WPO (World Packaging Organization)
Open the catalog to page 10Test principle and standards ASTM D3985 Standard Test Method for Oxygen Gas Transmission Rate Through Plastic Film and Sheeting Using a Coulometric Sensor ISO 15105-2 Plastics -- Film and sheeting -- Determination of gas-transmission rate -- Part 2: Equal-pressure method ASTM F1307 Standard Test Method for Oxygen Transmission Rate Through Dry Packages Using a Coulometric Sensor Note: Customization is necessary on Labthink OTR instruments if ASTM F1927 compliance is required
Open the catalog to page 113 Test principle and standards labthlnk* SThe 1st Corporate Partner of WPO (World Packaging Organization) Based on standards, briefly, when designing a testing equipment, manufacturers must scientifically consider and deal with the following points: 1. Good structural design 2. Excellent system sealing effect 3. Accurate temperature and humidity control 4. Coulometric oxygen senor 6. High sensitivity and reliability of signal processing. Key words: coulometric sensor, excellent signal processing, accurate temperature and humidity control 7,1.5 Coulometric Sensor—An oxygen-sensitive eoulomel-ric...
Open the catalog to page 12The 1st Corporate Partner of WPO (World Packaging Organization) Development history of Labthink oxygen permeation instruments TOY-C1/C2, OX2-231 The first generation
Open the catalog to page 13Parameters / models
Open the catalog to page 14labthlnk* I The 1st Corporate Partner of WPO (World Packaging Organization)
Open the catalog to page 15Accurate coulometric sensor Labthink patented Coulometric oxygen sensor is developed by associated China and U.S. R&D team based on top class scientific and technical achievements in sensor technology fields. The advanced sensor working with highly sensitive signal processing circuit provides excellent test accuracy, repeatability and ultra-long service life. The new Coulometric oxygen sensor makes Labthink be the unique supplier among all manufacturers in China which has the ability to independently produce OTR tester completely complying with ASTM D3985. Labthink Patented sensors
Open the catalog to page 16labthlnk* Accurate coulometric sensor The detection limit, precision and repeatability of fully absorbed oxygen sensor is better than partially absorbed oxygen sensor. Each oxygen molecule passing through the oxygen sensor produces four electrons
Open the catalog to page 17The 1st Corporate Partner of WPO (World Packaging Organization) Labthink IAccurate temperature and humidity control The patented three-cell integrated test block structure using advanced thermodynamics and hydrodynamics analysis design greatly reduces the temperature, humidity and flow difference between three test cells. Uniform testing conditions makes sure the test results can be obtained more accurately.
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