Bending-Folding-Stiffness Testers
Bending-Folding-Stiffness Testers determines the breakdown resistance of leather, vinyl coated fabric, synthetics, rubberoids, paper, and the like. Product applications which call for flexing and folding may cause your material to split, crack, craze, or separate at the seam. To predict these types of degradation, it is important to simulate the mechanical action taking place in your product's service life environment.
The flexing action replicates the physical stresses normally exerted on fabrics and other materials in various automotive, commercial and industrial environments, allowing you to predict the durability of the materials when assembled in their final form.
Test specimens are easily clamped into one of four sample positions. Three of these positions perform flex testing. The sample is held under a uniform tension of the while moving one end of while moving one end of the sample through a given distance each side of the perpendicular.
This action creates flexural stresses and strain on the sample, which simulates normal wear and causes the material to break down. A change in length of the sample gives a further indication of the material's breakdown.
Applications
The Low Temperature Bally Resistance Flexing Tester was designed for the determination of the mechanical stability of anchorage of the coating materials to the backing fabric, due to flexing and folding.
Standards
Chrysler LP-463LB-9-01, Chrysler LP-463KB-13-01, Chrysler LP-463KB-10-01, IFAI J1531, Commercial Standard CS-273-65
Technical Parameters:
1.Tabletop design.
2.Capacity for testing three flex specimens simultaneously.
3.One fold sample capacity.
4.Each specimen holders may be tensioned individually.
5.Stroke Length: 2.75 inch.
6.Clamp separation: 152mm (6inches).
7.Stroke Rate: 35 CPM.
8.Tension Load: 8 lbs. Adjustable.
9.Pressure plate load: 641N (12lbf) when closed.
10.Specimen size, flex: 76×203mm(3×8inches).
11.Specimen size, fold: 129×129mm (5×5inches).
12.Electronic cycle counter with reset.
13.Electronic counter: 6 digit.
14.External dimension: 36×12×22inches (L×D×H).
Features
(1) Multiple test stations for higher testing efficiency
(2) Individually adjustable tension for each specimen
(3) Stable reciprocating mechanism ensures repeatable results
(4) Compact tabletop design for laboratory use
(5) Electronic counter for accurate cycle recording
(6) Suitable for various flexible material fatigue tests
FAQ
(1) How is material failure determined during testing?
Failure is typically defined by visible cracking, delamination, or breakage, combined with the number of cycles completed. Specific criteria should follow the referenced standard to ensure consistency and comparability of results.
(2) Can the flexing rate be adjusted?
The standard test rate is 35 CPM. Any deviation should follow internal or customer specifications and must be clearly documented, as changes in rate can significantly affect fatigue performance results.
(3) How does tension setting influence test results?
Tension directly affects stress levels on the specimen. Excessive tension accelerates failure, while insufficient tension may not represent real conditions. Proper settings should align with standard requirements or application conditions.
(4) What types of materials are suitable for this test?
The tester is mainly used for flexible materials such as leather, coated fabrics, and rubber. It is particularly relevant for products subjected to repeated bending, such as automotive interiors and footwear components.
(5) What should be considered when selecting this equipment?
Key factors include the number of test stations, tension adjustment capability, motion stability, and compliance with required standards. Selection should match actual testing needs. For detailed guidance, contact QINSUN engineers.
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