How to commence a test using a dart impact tester?

Plastic films are used in a variety of applications. One of the most common uses for the plastic film is that it acts as a protective barrier to protect surfaces from scratches, dirt, and moisture. It can also be used to protect food and other perishable items from spoilage. In order to ensure that plastic film is effective, it is important to test the quality of the film. One way to do this is to test the dart impact resistance of these films. Dart impact resistance is a measure of the ability of the film to resist puncturing and tearing. Thus, with Presto darts impact resistance tester it will be easy for you to determine the impact of the free-falling dart on plastic films. This energy of the free-falling dart will cause the film to fail under specified conditions. 

Assess the durability and strength of plastic films with Presto dart impact resistance tester

Features of Presto dart impact resistance tester

• Built on a rigid metallic base.
• Strong Electromagnetic dart holder.
• Dart released at the press of a button.
• Reliable, the fast and accurate measurement of variable heights.
• Electromagnetic Hold and release mechanism for dart
• Drop Height adjustable clamp
• Inbuilt Digital counter for counting the number of falls during a single test operation
• Circular annular clamping devices for zero slippage
• Shielding structure to prevent the dart from falling out after bouncing from the sample
• Strong base plate with rugged structure
• Clamping Shield height adjustable collar
• Standard: IS 2508:1984(R2003), ASTM D1709-16A.

Technical Specifications of Presto dart impact resistance tester

• Inside diameter of clamp: 127mm
• Diameter of dart head: Method A – 38 mm, Method B - 50.8 mm ± 0.13 mm
• Height of fall:660 mm and 1524 mm(Adjustable)
• Maximum weight holding capacity of Dart Holding Mechanism: 2Kg
• Dart Head Material: Method A - Phenolic & Method B - Steel
• Least Count of Height Adjustable Clamp: 1 mm
• Type of test: Free-Falling Dart
• Release Mechanism: Electromagnetic dart hold/release mechanism
• Clamping Unit: Circular annular clamping unit with zero slippage
• Counter: Digital.
• A vacuum Pump of CFM 1.8, 1/4 Hp Motor is provided with it.
• Electrical Requirement: Single Phase 220 V AC

Steps to conduct dart impact resistance test on plastic films

• Turn ON the machine by plugging the main socket of the machine into a 3-pin 15 amp socket.
• Take a specimen of plastic film the user want to test with the dimensions that allow the specimen to flow out of the clamping unit for at least 25 mm.
• Remove the outer clamping ring and separate it from the unit. Now place the specimen on the inner clamping ring.
• Put the back of the outer clamping ring in its place. After placing the specimen, insert the pipe from the vacuum pump into the vacuum pressure ports and plug the vacuum pump into a 3-pin 5 amp socket.
• Make sure that the specimen does not have any wrinkles. The specimen must be completely wrinkle-free during the test.
• Now adjust the height of the protective shield of the dart. Once you set the height of this testing instrument, you can commence the test with ease.