ASTM D5804 Test for Zero Span Tensile Strength

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ASTM D5804 testing. This standard provides a fast and reliable way to measure the zero span tensile strength of a randomly oriented fiber sample in the dry state.

While testing on finished paper materials is possible, information on fiber quality from pulping or intermediate steps in the papermaking process or both is often more useful to improve the quality of the finished paper or to improve the fiber use of recycled fibers, for example, or new pulping, bleaching or fibers subjected to finishing processes.

Modifications of the procedure described in this test method for testing finished paper are simple; however, the test should be performed in the two cardinal directions of the sheet, as required in Test Method D828, as the finished paper or board will generally have non-random fiber orientation, resulting in different strength properties in the two cardinal directions of the finished product. sheet. Testing sheets with a weight greater than 100 g/mXNUMX, including some paper materials and many paperboards, defined as paper, is difficult due to problems with interlocking of individual fibers as the number of fibers per unit area increases.

Such changes are not disclosed in this test method and, if made, will be considered and clearly explained in the report as deviations from standard procedure.

One approach is to use a custom made "zero clearance" jaw pair used in conjunction with a conventional tensile testing machine. Such a design for "zero clearance" jaws was proposed by Clark (1). A second design is proposed by Wink and Van Eperen (2).

A second approach is to use a special device that combines both "zero-span" jaws and measuring and reading devices in one device. Any of the instrumental approaches can be used to perform this test method, when properly set up and calibrated.

EUROLAB assists manufacturers with ASTM D5804 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.