The PTP aluminum foil is a main medicine packaging. It is made up of pharmaceutical aluminum foil, medicinal polyvinyl chloride (PVC), printing materials, protective agents, adhesives, etc. This blister packaging is to put medicines in the pits of a plastic hard sheet formed by blister, and then press and seal the plastic hard sheet with a piece of aluminum foil that has been gravure printed and coated with a protective agent and adhesive.
The PTP aluminium foil is made of electrolytic aluminum with a purity of more than 99%, which is made by rolling. has excellent electrical conductivity and light-shielding properties, and has extremely high moisture resistance, gas barrier properties and taste retention, which can most effectively ensure the medicine quality.
When it is made into a blister pack,it is convenient for the patient to take the medicine and carry it. Therefore, this type of packaging is widely used in the field of pharmaceutical packaging and is one of the main packaging trends today. To ensure the blister packaging quality, we first need to guarantee the PTP foil quality.
Due to the rolling process used in the production of aluminum foil, there are inevitably some defects. Pinholes are the most important one. The size and quantity of pinholes are one of the important metrics to measure the quality of PTP blister foil.
It is also because of the existence of pinholes that the permeation of oxygen and water vapor to the aluminum foil is not zero. The size and number of aluminum foil pinholes have a decisive influence on the moisture resistance, gas barrier properties and light-shielding properties of aluminum foil and its composite materials.
How to inspect the pinhole degree of the finished medical aluminum foil? We need to make use of pinhole inspection table. We can use a wooden box of 800 mm* 600 mm*300 mm or an appropriate size, install a 30W fluorescent lamp in the wooden box, and put a glass plate on the wooden box. The glass plate is lined with black paper and leave a space of 400 mm x 250 mm to check the pinhole of the samples.
Take 20 specimens of 400 mm in length and 250 mm in width from the finished aluminum foil, and place them on the pinhole inspection table one by one, and inspect the pinholes in the dark. The requirement for pinholes is that there should be no dense, continuous and periodic pinholes. No pinholes should be larger than 0.3 mm in diameter. There is no more than 1 pinhole per square meter with a diameter of 0.1-0.3 mm.
As a professional PTP foil manufacturer, Haomei Aluminum has a strict control of PTP aluminum foil production process. Welcome to leave message below to inquire PTP foil price.
Original source: https://www.hm-alu.com/a/how-to-test-ptp-aluminum-foil-quality.html
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