Testing machines for paper materials - Zwick - #3

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3 Fig. 4: Hygienic articles give protection Fig. 3: Paper compounds in daily use Fig. 1: Paper as robust Fig. 2: Paper for technical uses packing Paper and paper materials Paper has accompanied man since ancient times (Fig. 1, page 2). Papyrus rolls show that man searched for, and found, a medium with which information could be stored and spread, while saving space and weight. This did not remain the only use. Books, and later industrial production of paper found new applications for this material. In the broadest sense, paper can be a structural material today, which carries and protects contents on the inside, while being an attractive information carrier on the outside (Fig. 1). Paper is technically a highly exacting product, which works dependably in its application and is easily recyclable at the end of its useful life. Paper in technological areas cannot be forgotten. Filter, protection and special papers must be tested for their characteristics and they must be monitored (Fig. 2). In a close relationship to plastics and metals, we find paper also as a compound material (Fig. 3). The combination of characteristics of the compound partners gives the end product its special capabilities. Paper is around us in everyday life: as sanitary or cosmetic tissues in hygienic and care areas (Fig. 4). Quality control - a key leading to cost- and function optimized products Although continuous quality control makes some effort, it anyway helps to save material and complaint costs. Example in corrugated board testing: If the raw papers are tested in a separate test lab, fluctuations of the strip crush resistance (SCT) can be recognized impartially and considered. Furthermore, if strength values and bending stiffness of the corrugated board and the boxes are monitored, variations in the corrugator or in the following converting machines can be discovered and adjusted. The tests mentioned above may also be used for the strength prediction of a box from the crush results of their related papers. A good estimation assures the merchantability of packagings during their lifetime, even under consideration of environmental influences during transport and storage. Zwick machines accept all the necessary test tools for these tests (Fig. 1, next page). Thus, using one machine, one can perform the incoming inspection quality control on papers, tests on corrugated board, and the final quality control of boxes. (Fig. 2, next page)