Puncture force refers to the maximum force value of the puncture device penetrating the rubber stopper or gasket during the puncture test, expressed in Newtons (N). This method is applicable to the determination of puncture force of injection stoppers and gaskets. The first instrument used is the Paratronix PMT-C puncture force tester. The instrument can vertically move the puncture device at a speed of 200mm/min ± 20mm/min, and the reaction force experienced by the puncture device during the movement can be recorded with an accuracy of ± 2N. The injection bottle should be placed at a suitable position in the axial direction so that the rubber stopper mark on the injection bottle can be vertically punctured.

Injection bottle: matched with the tested rubber stopper, with a capacity of 50ml or more (including 50mI), 10 pieces.

Aluminum cover or aluminum-plastic composite cover: matched with the tested rubber plug, 10 pieces

Sealing machine: matched with the tested rubber plug. Puncture device: Standard metal puncture device reference material, 2 pieces

Place the 10 pre treated injection bottles into the puncture device, open the aluminum cap or aluminum-plastic combination cap, and expose the marked area of the rubber stopper. The puncture device performs a straight puncture on the marked area of the rubber stopper at a speed of 200mnmn/min, and records the maximum force applied to pierce through the rubber case. Repeat the above steps to puncture the next 4 injection bottles. Before each puncture, wipe the puncture device with acetone or other suitable organic solvents. After all 5 injection bottles have been punctured once, replace the puncture device and repeat the above steps to puncture the remaining 5 injection bottles

The Second Law

Instrument:Paratronix TechnologyPMT-C puncture force tester，This instrument can make the puncture needle move at a speed of 200mm/min ± 20mm/min, and the reaction force experienced by the puncture needle during the movement can be recorded. The pin degree is ± 0.25N. There should be a suitable position in the axial direction to place the injection bottle, so that the rubber stopper mark on the injection bottle can be vertically punctured

Injection bottle: matched with the tested rubber stopper, with a capacity of less than 50ml, 10 pieces

Aluminum cover or aluminum-plastic composite cover: matched with the tested rubber plug, 10 pieces

Sealing machine: matched with the tested rubber plug.

Puncture needle; Metal puncture needle reference material, outer diameter 0.8mm, oblique angle type 1 (long type), oblique angle 12 ± 2 ", 10 pieces. Wipe with acetone or other suitable organic solvents before use.

Take 10 matching injection bottles, add water of nominal capacity to each bottle, install pre treated test stoppers, add aluminum caps or aluminum-plastic composite caps, seal with a capping machine, place a residual needle on the material testing machine, place the injection bottle in the material testing machine, open the aluminum cap or aluminum-plastic composite cap, expose the marked area of the stopper, and vertically puncture the marked position of the stopper with a gate needle at a speed of 200mm/min, recording the maximum force value applied to clear the stopper. Replace the puncture needle and repeat the above steps until all rubber plugs are pierced once.

The third method

Instrument:Paratronix TechnologyPMT-C puncture force tester，The instrument is capable of allowing the puncture device to move vertically at a speed of 200mm/min ± 20mm/min, and the reaction force experienced by the puncture device during the movement can be recorded with an accuracy of ± 2N. There should be a suitable position in the axial direction to place the gasket support device, so that the marked area on the support device can be pierced vertically.

Gasket support device: This device is a steel cylinder with a gasket clamp. When the gasket is clamped on the top of the device with the clamp, the device can support and secure the gasket from being left in the bottle during puncture. The capacity of the bottle is over 50m (including 50ml); Other suitable gasket support devices can also be used for this experiment. The gasket support device is shown in Figure 1.

Puncture device: standard metal puncture device reference material and plastic puncture device reference material.

Take a pre treated pad and place it in a support device. Wipe a puncture device with ketone or other suitable organic solvent to minimize passivation. Fix the puncture device on a material testing machine and perform vertical puncture on the marked area of the pad at a speed of 200mm/min. Record the maximum force applied to pierce through the pad. Repeat the above steps with another pad until all 10 pads have been punctured once. Before using the puncture device, check the sharpness of the puncture device, which should maintain its original sharpness without damage.

The result is expressed as the maximum force applied to pierce through the gasket, and the type of piercing device used is indicated in the result