To address the creation of new products that trend seek

• No.2033
• [JIS]P-8116-2000
• [TAPPI]T414om-98
• [ISO]1974

This machine is designed to measure the resistance to tearing of various kinds of printing paper such as newspaper, paper bags, packing paper, when subject to tearing stress during their use. Usually, tear resistance is composed of force of extracting fibers from paper layers and force of cutting the fibers. In general, the longer the fiber length is, the stronger tear resistance is. When the binding area among fibers increases, exceeding the optimal area, the tear strength decreases inversely with the trends of tensile and bursting strengths. This machine with an additional weight on (option) is able to measure a wide range of materials, including paper, paperboard, fibers, plastic film and the like. With a pneumatic specimen clamp, the system is excellent in operation, displaying an average measurement for a unit of 16 sheets.

• No.2035
• [JIS]P-8116-2000
• [TAPPI]T414om-98
• [ISO]1974

Tear strength is defined as a value of resistance to tearing when a sheet of paper is held with both hands and torn. To simulate this force, the fan-shaped pendulum is swung down onto the paper from a certain level of height to tear it, and the energy loss of the pendulum at that time is given as tear strength. According to the strength of a paper sheet, change the number of paper sheets from one to sixteen, and the value obtained is converted to the value at the time 16 sheets of the same paper are subject to tearing. This value is used as a tear value.

• No.2036
• [JIS]P-8116-2000
• [TAPPI]T414om-98
• [ISO]1974

This machine finds uses in testing the tear strength of corrugated board base paper, roofing, woven textile and the like, which the No.2035 cannot measure. A weight mass is fixed to the center of the pendulum to double swing energy. Handling is the same as in the case of the No.2035: the lost energy is read on a scale on the pendulum when the specimen is torn.

• No.2037
• [JIS]
• [TAPPI]
• [ISO]

This machine was developed with KRK’s own technology to test the tear strength of thin paper sheets, synthetic paper, cellophane or the like: tear strength of these specimens is difficult to be measured by testers available on market. The principle of this machine is the same as that of the standard type (JIS standard). The rotation speed of the pendulum with no load is almost the same as that in the case of a standard type. The maximum tear energy is 1/3 or 1/4 of the standard type (selectable). The position of the chuck is the same as the standard type: the chuck is 27.5 degrees from the vertical line passing the rotation axis with a rotation radius of 104 mm. The size of the specimen, the depth needed to chuck the specimen and the groove depth are also the same as those of the standard type.