Clark stiffness tester (automatic type)

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.

参考規格 :

[JIS]P-8143-1996
[TAPPI]T451cm-84

Specifications

Type	fully automatic with digital display	Measurement method	per JIS (Clark stiffness), both methods A and B are available Automatically performs repetitive bending to determine the critical length.
Specimen length	100 to 500mm, to be input from the ten-key max. critical length on display 46cm while measuring	Specimen feed switch	Even with a long specimen, measurement is done in a short time, by adjusting the projection length
Specimen Width	15 to 50mm （typically 30mm） Selectable among 15, 20, 25, 30, 40, 50mm by the selection switch.	Specimen direction	MD, CD, non-directional
Selection of test method	Selectable between methods A and B by the selection switch	Determination of bending angle	Method A: 90-degree bending, Method B: bending at an acute angle and at an obtuse angle (the critical length is obtained by calculation from the extending length
Flexing speed	1rpm (rotation speed of specimen)	Data display	Clitical length and stiffness are shown digitally
Optional	MD, CD, non-directional	Power source	100/110VAC 50/60Hz 1A
Outer dimentions	320×385×480mm	Instrument weight	1８kg