BS 3424-5 Testing of Coated Fabrics, Methods 7A, 7B, and 7C, Test Standard for Determining Tear Strength

EUROLAB laboratory provides testing and compliance service within the scope of BS 3424-5 standard. It describes 3 methods for determining the tear strength of coated fabrics and provides advice on analyzing autographic records and deriving median values ​​from them.

Under the conditions of use, the error of the maximum force indicated or recorded at any point in the range in which the machine is used does not exceed ± 1% of the force. The width of the jaws is not less than the width of the specimen.

The resulting trace consists of a series of peaks, each representing the force at which the fabric is torn, and pits corresponding to the reduction of the force after tearing.

Highlight the peaks in the charts with a pencil point, ignore the part of the trace that represents the first 10 mm of tear (normally the first 20 mm of the trace), and find the median of the corresponding force readings. This is best done by counting the total number of peaks and the number in successive strength intervals until the middle reading in order of value is isolated.

Determine the average of the median values ​​in Newtons for the five samples as the longitudinal or transverse tear strength according to the tearing of the longitudinal or transverse yarns, respectively.

EUROLAB assists manufacturers with BS 3424-5 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.