Medicinal plastic bottles of water vapor transmittance detection method

Medicinal plastic bottles of water vapor transmittance detection method of medicinal plastic bottles for its light quality, high strength, as well as good tightness and pressure resistance, is gradually replace medicinal glass bottles, are widely used in oral solid and liquid medicine packaging. Water vapour is an important factor affecting the safety of drug quality, in order to prevent water vapor on the influence of drugs, pharmaceutical plastic bottles should be wet performance, has the very good resistance to ensure product quality and safety. This article will combine Labthink lincom PERME bo dense W3/330 water vapor transmittance test system, a simple introduction of medicinal plastic bottles of water vapor transmittance detection method. Water vapor transmittance is mainly refers to medicinal plastic bottles of water vapor barrier, moisture resistance performance is good or bad directly affects the quality of medicine in shelf period, it is also an important factor analysis of shelf life. Through the test can solve due to water vapor sensitive drugs be affected with damp be affected with damp mildew problem. Labthink lincom W3/330 water vapor transmittance test system, the method of electrochemical sensor testing principle and equipment adopted three test chamber one integrated piece of patent technology, computer control, automatic test, clamping sample, click test, automatic test, automatic humidity, temperature, flow rate and other indicators of control, the experiment ended automatic judgment and issue a report. Instrument can also join 9 satellite machine, 30 a complete sample test, both in terms of degree of automation of the operation, the test efficiency, detecting resolution and detection limit has reached the international advanced level, with many indexes also maintained a lead. Test process is as follows: the advance processing good blister sample in a test chamber, a certain humidity of nitrogen gas flow on the outer edge of the blister packaging, high purity nitrogen gas flow in the inner side of the blister packaging, because of the humidity gradient, the water vapor molecules through the membrane from the outer edge of the blister, spread to the inside of the high purity nitrogen by the flow of nitrogen to the sensor, to carry through to the sensor to measure water vapor concentration is analyzed, and calculate the parameters such as water vapor transmittance, in the performance evaluation of test samples. , of course, to ensure the water vapor through the index of medicinal plastic bottles packaging after qualified, also need to some of the other indicators such as resistance to wet, sealing, to ensure that the shelves during the period of the quality of the products.