Medicine bottle cap gasket is a commonly used material for pharmaceutical plastic bottles to enhance the airtightness. In order to ensure the airtightness of the material, it is necessary to test its various properties. Among them, the heat seal strength is a very important test item.
28mm child resistant cap for liquid medicine
As a sealing gasket, it is heat sealed on the seal of the pharmaceutical bottle to achieve the purpose of sealing. Heat sealing is to use various external conditions to heat the aluminum-plastic composite film of the gasket into a viscous state. With the help of a certain pressure, the aluminum-plastic film of the gasket is integrated with the mouth of the plastic bottle. After cooling, the two maintain a certain degree of stability. strength. In order to ensure that pharmaceutical bottles withstand certain external forces during transportation, storage and sales, reduce the occurrence of rupture and leakage, and reduce the penetration of oxygen and water vapor, it is required that the aluminum-plastic gasket has sufficient strength after sealing, and heat sealing strength is usually used. An indicator to detect and measure. In the YBB00152005-2015 standard of "Pharmaceutical Polyester/Aluminum/Polyethylene Sealing Gasket", the thermal core requirements for the gasket are as follows:
Take 6 pieces of medical polyester/aluminum/polyethylene sealing gaskets, cut out a 15mm wide test piece from the gasket part, and heat-seal them on the matching polyethylene bottles with high frequency. After cooling, confirm that both ends of the test piece are well sealed with the container, cut one end and clamp it on the clamp of the tensile testing machine, fix the corresponding container at the same time, and peel it off at a speed of 200mm/min±20mm/min. Measure 6 times respectively, and calculate the arithmetic mean value of the 6 measured values, which shall not be lower than 7.0N/15mm.
The heat sealing strength of the gasket is related to the stability of the contents. The combination of qualified gaskets and high-quality bottle caps can ensure the overall sealing of medicinal plastic bottles and ensure drug safety.
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