The search results of the 「Physical testing Stiffness」

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Clark stiffness tester (automatic type)
Physical testing / Stiffness
  • No.2046
  • [JIS]P-8143-1996
  • [TAPPI]T451cm-84
  • [ISO]
This machine measures the stiffness of paper, fiber and film by the self-weight flexing method. Typical specimens are papers of small basis weight such as newspaper and thin paper. The specimen is pinched between a set of rolls, and the rolls are turned slowly in both directions. The length of specimen projection from the rolls is measured, when the deflection angle of the specimen from one side to the other becomes 90 degrees. Based on this length, the Clark stiffness is determined. Conventionally, this test has required skilled technique and much time of operation, which would often cause inter-operator error. Aimed at solving such problems and labor saving, we have developed this tester that performs a series of operation steps automatically.
Clark stiffness tester (motorized type)
Physical testing / Stiffness
  • No.2047
  • [JIS]P-8143-1996
  • [TAPPI]T451cm-84
  • [ISO]
Paper stiffness is one of essential characteristics. Newspaper and printing paper must have a stiffness enabling proper handling. This machine measures the stiffness of papers, fibers and films. Typical specimens are papers of small basis weight such as newspaper and thin paper. Stiffness is determined from the flexing load of the specimen. The length of specimen portion extending from the rolls is measured, when the deflection angle of the specimen from one side to the other becomes 90 degrees. Based on this length (critical length), Clark stiffness is obtained.
Bending stiffness tester
Physical testing / Stiffness
  • No.2048-BF
  • [JIS]
  • [TAPPI]T556pm-95
  • [ISO]2493 SCAN P-29
Bending resistance is a measure of the stiffness. Like the Taber stiffness tester, this tester measures the force necessary for bending the specimen to the specified angle. With the Taber tester, flexural loads are given by a pendulum held vertically to determine the bending moment. With the bending stiffness tester, one end of the specimen is held horizontally to form a cantilever beam. A knife edge directly connected with a load cell is made to contact the other end of the specimen. The specimen is made to rotate at a constant speed. When the specimen is bent to the specified angle, the load is detected by the load cell to be displayed.
Taber stiffness tester (automatic type)
Physical testing / Stiffness
  • No.2048-D
  • [JIS]P-8125-2000
  • [TAPPI]T489os-99
  • [ISO]2493
Stiffness is one of important parameters for assessing the appropriateness of material for processing and printing. There are nearly proportional relationships between stiffness and beating degree, basis weight, thickness and water content. The correlation is remarkable especially with thickness. As with the No.2048-M, one end of the specimen (paper, paperboard, plastic sheet, metal foil, etc.) is held, and around the held point, the specimen is turned slowly, thereby being given flexural loads. The loading point (rotation angle) is read by a sensor when the deflection angle is 15 degrees, to calculate and output stiffness.
Taber stiffness tester (motorized type)
Physical testing / Stiffness
  • No.2048-M
  • [JIS]P-8125-2000
  • [TAPPI]T489os-99
  • [ISO]2493
This tester readily measures the stiffness of paper and paperboard. Features a high precision: a pendulum gives flexural loads to the specimen. Use of an auxiliary weight or a correcting element widens the measurement range, increasing sensitivity and reproducibility. One end of the specimen is held on the pendulum rotating axis, while the other end is positioned between a pair of rollers that turn with the loading disc to exert flexural loads on the specimen. The loading point (rotation angle) is read on the outer scale disc when the specified deflection angle, 15 or 7.5 degrees, is reached.
Gurley stiffness tester (automatic type)
Physical testing / Stiffness
  • No.2049-D
  • [JIS]L-1085,1096
  • [TAPPI]T-543pm-00
  • [ISO]
This machine automatically measures the stiffness of paper, film, nonwoven textile, etc. By changing the specimen size and selecting a weight on the pendulum, it enables measurements of a wide range of stiffness. One end of the specimen is held on the movable clamp. The other end is set at a position so that it overlaps the top of the pendulum by 6.4mm. Then the arm with the specimen is slowly moved to deflect the specimen as the load increases, thereby tilting the pendulum. At last, specimen detaches from the pendulum. The maximum rotation angle at that detaching moment is captured by a sensor, to calculate and display stiffness. This machine releases the operator from tiresome calculation involving the specimen size and weight and position of the mass, as with the conventional tester, permitting accurate and rapid measurements, thereby increasing productivity in research and develop activities.
Gurley stiffness tester (motorized type)
Physical testing / Stiffness
  • No.2049-M
  • [JIS]L-1085,1096
  • [TAPPI]T-543pm-00
  • [ISO]
This machine measures the flexibility of papers, films and fabrics. Construction: one end of the specimen is put in the clamp of the movable arm, and the other end is made to contact the measurement pendulum. The movable arm is rotated to left and right at a constant speed. The specimen deflects, inclining the pendulum. As the load increases, the specimen deflects increasingly, and finally it detaches from the contact point, when the deflection, that is, inclination angle of the pendulum, is read on the lower scale. A wide range of measurement is available by changing the clamp position and the weight and the weight position, depending upon specimen stiffness.

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