| Nowadays, PET bottle has found its wide | | | | PET bottle preform barrier performances and |
| applications in beverage, dairy, pharmaceuticals | | | | technologies have paved the way for carrying out |
| and chemistry, etc. This mainly relies on the | | | | of various barrier performance solutions. High |
| development of its barrier performance | | | | barrier performance is closely linked to barrier |
| development. In order to achieve better barrier | | | | performance testing. When testing the barrier |
| performance, the research and control of PET | | | | performances of PET packages and PET bottle |
| bottle preform barrier property is a must. At | | | | preforms, Oxygen Permeability Rate Tester is a |
| present, the following four techniques are | | | | useful tool. Labthink introduces Labthink PERME |
| commonly applied so as to improve the barrier | | | | OX2/230 Oxygen Transmission Rate Test |
| property of PET PET bottle preform barrier | | | | System for PET bottle and PET bottle preform |
| property. 1. PET Bottle Preform Barrier Property | | | | barrier property testing. Oxygen transmission rate |
| Solution: Multi-layer Multi-layer method is also | | | | (OTR) is the most common testing for barrier |
| defined as complex injection method. Inject PET | | | | property testing of PET bottle and PET bottle |
| backings, and then, inject barrier material through | | | | preform. ASTM F1307, GB/T 19789 and other |
| hot mold core to form central barrier layer. This | | | | equal pressure testing methods are applicable. |
| method requires high skills of the operator and | | | | Isolate the transmission chamber with the |
| strict quality control. 2. PET Bottle Preform Barrier | | | | pre-conditioned specimen to form two separated |
| Property Solution: Raw Material Blending Input | | | | gas flow system: the testing gas flows outside |
| barrier material directly into the PET raw | | | | the PET bottle or the bottle preform (testing gas |
| materials, which is favorable for standard bottle | | | | can be pure oxygen, or the gas mixture with |
| preform process systematically with the prepared | | | | oxygen); high pure carrying gas flows inside the |
| materials. This method requires no other | | | | bottle or bottle preform. Though the two sides |
| processing measures, and requires little of the | | | | are of the same pressure, the oxygen partial |
| operator. However, the blended barrier material | | | | pressures are different. Due to the oxygen |
| would reduce the transparency of the PET bottles | | | | concentration differences, oxygen transmits |
| and result in turbidity. 3. PET Bottle Preform | | | | through the package, and is carried to the sensor |
| Barrier Property Solution: Coating Coating is to | | | | which would bring forward accurate oxygen |
| plasma coat on the inner and outer sides of the | | | | quantity in the carrier gas flow so as to calculate |
| molded bottle preform, this processing is usually | | | | oxygen transmission rate. Labthink PERME OX2 |
| quite complicated. 4. PET Bottle Preform Barrier | | | | 230 Oxygen Transmission Rate Test System can |
| Property Solution: Multi-molding This method starts | | | | provide thorough oxygen testing means for |
| from the interior molding, and makes multi-layer | | | | barrier property of PET bottle and PET bottle |
| molding during equal processing period. | | | | preform. Besides, this instrument is of |
| Multi-molding method is quite complicated since it | | | | master-satellite mode, a master preform can |
| requires every layer to be very thin; however, in | | | | support nine satellite modules; thus, 30 specimens |
| actual application, mold core may be deviated by | | | | can be tested at the same time. Its testing |
| the pressure differences and failed to realize even | | | | accuracy and technology have both achieved |
| thickness. Besides, when the first molding period | | | | world advanced standard. About Labthink: |
| finishes, the bottle preform has to be transmitted | | | | Labthink, the excellent provider of testing |
| to another molding chamber for further molding. | | | | instruments and testing services, is devoted to |
| This process is accomplished through rotation, and | | | | provide most excellent and complete quality |
| would easily lead to peel of layers. This problem | | | | control solutions for pharmaceutical, foodstuff, |
| has been resolved by some companies: when | | | | cosmetics, packaging, printing, adhesive, |
| changing molding chamber, several lines of mold | | | | automotive, petrochemistry, environment, biology, |
| cores moves in the parallel way which replaces | | | | new energy, construction, aviation and electronic |
| the rotation and avoids layer peeling. The | | | | industries worldwide. Labthink Instruments Co., Ltd. |
| above-mentioned progress and applications on | | | | Mark Won Secretary@labthink. |