ISO 8295 Coefficient of Friction Plastic Film and Sheeting
ISO 8295 is a standardized test method used for determining static (μ_s ) and kinetic (μ_k ) coefficients of friction of plastic film and sheeting. Plastic film is a widely used material in the packaging industry. Within the packaging industry the use of film can be separated into two categories: food packaging such as produce bags, carton liners, or meat seal wrap, and non-food packaging such as envelope liners or potting soil sacks. Outside of the packaging industry, plastic films are used for an assortment of products: trash bags, can liners, I.V. bags, construction liners, and other barriers. Thin films are also an important component of electric vehicle batteries, which is an industry predicted to experience explosive growth over the course of the next decade. The frictional properties of these films must be characterized and controlled to ensure the safety and functionality of the end product.
Separator films for electric vehicle batteries are being produced in increasingly high volumes and must undergo frictional testing as part of a robust material characterization process. These films are used to separate the anode and cathode in lithium-ion and other liquid electrolyte batteries, and are extremely critical to product safety. The most common material used for separator film is polyolefin, a polymer film that is strong enough to withstand the winding operation during assembly as well as uneven plating of lithium on the anode due to extensive use. Safer and stronger separator material more effectively prevents contact between the anode and cathode, while thinner material helps reduce the weight of each battery and improve energy density. Understanding the frictional properties of this polymer film can help ensure the material is being wound properly during assembly and will behave as expected under extensive use. Testing standards specific to electric vehicle batteries have not yet been established, so ISO 8295 is commonly used as a proxy standard to characterize the frictional properties of these materials.
| ISO 8295 Test Setup | |
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6800 Series Universal Testing System
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Bluehill Universal Software
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2530 Series Load Cell
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| 2810-005 Coefficient of Friction Fixture | |
How to Perform a Test to ISO 8295
The ISO 8295 test method is used to investigate the static and dynamic frictional properties of film and sheet plastics when sliding against either itself or another material. This method is intended to be used for non-sticky plastic film and sheeting of up to 0.5 mm in thickness. To perform this test, the specimen is supported on a friction table consisting of a horizontal test table, a sled, and a driving mechanism which uses a pully to produce a relative motion between the sled and the test table. One piece of the specimen is attached to the table with double-sided adhesive tape while the other piece is secured to the sled in the same way. The test machine then drags the sled across the table at a constant rate of displacement, causing friction between the two pieces of material. The force is recorded, and test results are calculated. As always we suggest reviewing the full ISO 8295 standard to fully understand the testing requirements.
6800 系列 - 万能材料试验系统
Instron 的6800 系列万能材料试验系统提供出色的精度及可靠性。 6800 系列基于正在申请专利的操作员保护架构，具有全新的智能气动控制装置和碰撞保护功能，使材料测试比以往任何时候都更简单、更智能、更安全。
2530 系列低力值载荷传感器
Instron 的2530系列载荷传感器是专门为 Instron 低力值测试系统所设计的。力的载荷范围为 ±5 至 ±100N（(0.5 – 10 kgf, 1.12 – 22.5 lbf)，载荷测量精度为示值的0.5%。
2580 系列载荷传感器
Instron 的 2580 系列载荷传感器专为 5900 系列和 6800系列万能材料试验系统而设计，具有卓越的性能，能够测量低至载荷范围1/1000的力，载荷测量精度为示值的0.5%。