How To Improve Barrier Performance Of Pet Bottle Preform?

Nowadays, PET bottle has located its large applications in beverage, dairy, pharmaceuticals and chemistry, etc. This mainly relies on the development of its barrier performance development. Sequential to achieve better barrier performance, the studies and manage of PET bottle preform barrier property is a must. At present, the following 4 techniques are commonly applied so as to improve the barrier property of PET bottle preform barrier property. PET Bottle Preform Barrier Property Solution: Multi-layer Multi-layer method shall also be defined as complex injection method.

Inject PET backings, and then, inject barrier fabric through warm mold core to shape central barrier layer. This method requires high skills regarding the operator and strict quality control. PET Bottle Preform Barrier Property Solution: Raw Fabric Blending Input barrier fabric directly into the PET raw materials, that is favorable for standard bottle preform process systematically with the prepared materials. This method requires no other processing measures, and requires little regarding the operator. However, the blended barrier fabric should reduce the transparency regarding the PET bottles and result in turbidity.

PET Bottle Preform Barrier Property Solution: Coating Coating is to plasma coat on the inner and outer sides regarding the molded bottle preform, this processing is usually barely complicated. PET Bottle Preform Barrier Property Solution: Multi-molding This method starts from the interior molding, and creates multi-layer molding during equal processing period. Multi-molding method is barely complicated since it requires every layer to be very thin; however, in actual application, mold core should be deviated by the compression differences and failed to realize even thickness. Besides, when first molding period finishes, the bottle preform has to be transmitted to another molding chamber for distant molding. This process is accomplished through rotation, and should with no problems lead to peel of layers.

This difficulty was resolved by some companies: when changing molding chamber, multiple lines of mold cores moves within the parallel method which replaces the rotation and avoids layer peeling. The above-mentioned progress and applications on PET bottle preform barrier performances and technologies have paved the method for carrying out of different barrier performance solutions. High barrier performance is closely linked to barrier performance testing. When testing the barrier performances of PET packages and PET bottle preforms, Oxygen Permeability Rate Tester is a useful tool. Labthink introduces Labthink PERME OX2 or 230 Oxygen Transmission Rate Test System for PET bottle and PET bottle preform barrier property testing.

Oxygen transmission rate OTR is the highest many common testing for barrier property testing of PET bottle and PET bottle preform. ASTM F1307, GB or T 19789 and other equal compression testing methods are applicable. Isolate the transmission chamber with the pre-conditioned specimen to shape 3 separated gas flow system: the testing gas flows outside the PET bottle or the bottle preform testing gas should be pure oxygen, or the gas mix with oxygen? high pure carrying gas flows inside the bottle or bottle preform. Though the 3 sides are regarding similar pressure, the oxygen partial pressures are different. Due to oxygen concentration differences, oxygen transmits through the package, and is carried to sensor which should bring forward accurate oxygen quantity within the carrier gas flow so as to calculate oxygen transmission rate.

Labthink PERME OX2 or 230 Oxygen Transmission Rate Test System can give thorough oxygen testing means for barrier property of PET bottle and PET bottle preform. Besides, this instrument is of master-satellite mode, a master preform can help nine satellite modules; thus, 30 specimens should be tested at similar time. Its testing accuracy and technology have most achieved world advanced standard. Those are the brief introduction for PET bottle preform barrier property technology improvement and relevant testing. Labthink Instruments Co.

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