ZY-CWY-A Corrugated Base Paper Fluting Tester Operating Instructions

Accurate CMT and CCT testing depends entirely on precise sample preparation. This Corrugating Medium Fluter operation guide ensures your laboratory remains compliant with ISO 7263 and TAPPI T809 standards. Follow these standardized steps from Zhongyi Instrument to eliminate data variance and ensure consistent flute formation for every test.https://zhongyiinstruments.com/1137.html

operating steps：

4.1.The specimens were processed to equilibrium under standard atmospheric conditions and then cut under the same atmospheric conditions. The specimen shall be 12.7 mm x 0.1 mm wide by 152 mm x 0.5 mm long, with the long side of the specimen in the longitudinal direction. The number of specimens should be such that 10 valid data can be measured.

4.2 Corrugated Medium Plain Strength Test (CMT)

4.2.1 The specimens were prepared as follows:

    Turn on the fluting equipment, set the temperature of the instrument at 175 degrees according to the instructions of the temperature controller, and wait for the temperature of the instrument to stabilize (175±8)℃。Insert the specimen straight into the paper sample inlet to make the specimen flute. After fluting the specimen, put it on the rack (B), and then press the comb plate (A) on the specimen, put it along the top of the corrugated with a 120 mm long tape, and press it on the steel plate to keep it firmly, take out the comb plate (A) carefully, and remove the specimen, so as to produce the specimen with 10 corrugated.

4.2.2 Perform the compression test immediately or after warm and wet treatment according to the requirements of the product standard. If the specimen is compressed immediately after fluting, the time from fluting to the application of pressure shall be less than 15s e If the specimen is treated with warm and humid treatment after fluting, it shall be treated for 30m in at 23℃, 50% relative humidity or for 60 min at 20℃, 65% relative humidity.

4.2.3 The specimens were tested as follows:

To perform the compression test, the specimen is placed in the middle of the lower platen of the compression gauge, with the untaped side up, and then compression is initiated, reading the maximum force to which the specimen is subjected when the specimen is completely crushed. The value of this force is the flat compressive strength of the specimen, expressed in N. If, during compression, the specimen is found to be deflected or the specimen is detached from the tape at any point, the result is discarded.

4.2.4 Calculation of results

    Ten valid data were measured and the results were expressed as their arithmetic mean. Maximum and minimum values are reported. Calculations are accurate to 1N.

Test results can be expressed in the following form:CMTo= 350N; CMT30= 250N

Here CMT denotes the corrugated medium test and the footnote denotes the time between fluting and compression, expressed in minutes.

Ⅴ、Corrugated Vertical Strength Test (CCT)

    This method is specifically designed for the determination of corrugated paper. As in the CMT (Corrugated Medium Test), the paper passes through a cold press corrugator and becomes the same core paper as in the wires. As in the CMT test procedure mentioned above, the formed core is also subjected to pressure, and the vertical compressive strength can be calculated at the moment of crushing.

5.1 Preparation of specimens (as for corrugated medium flat compression test (CMT))

     The specimens were processed to equilibrium under standard atmospheric conditions and then cut under the same atmospheric conditions. The specimen shall be 12.7 mm x 0.1 mm wide by 152 mm x 0.5 mm long, with the long side of the specimen in the longitudinal direction. The number of specimens should be such that 10 valid data can be measured.

5.2 Corrugated Compression Strength Test (CCT)

5.2.1 Specimens are prepared as follows:

Turn on the fluting equipment, set the temperature of the instrument at 175 degrees according to the instructions of the temperature controller, and wait for the temperature of the instrument to stabilize (175 ± 8) degrees. Insert the specimen vertically into the “paper sample inlet” to make the specimen flute. Place the fluted specimen on the rack of the “base”, and adjust the knob so that the teeth of the “sliding press” are close to the specimen, to make the specimen vertical.

5.2.2 Requirements according to product standards：

Immediately perform the compression test or warm and wet treatment followed by the compression test. If the specimen is compressed immediately after fluting, the time from fluting to the application of pressure shall be less than 15 s e If the specimen is subjected to temperature and humidity treatment after fluting, the specimen shall be processed for 30 m in at 23°C, 50% relative humidity or for 60 min at 20°C, 65% relative humidity.

5.2.3 Specimens are tested as follows:

To carry out the compression test, the specimen is placed in the middle of the lower platen of the compressor, the protruding side of the test specimen goes upwards, and then the compression is started, and the maximum force that the specimen is subjected to when the specimen is completely crushed is read. The value of this force is the vertical compressive strength of the specimen, expressed in N. If the specimen is already deformed during clamping, the result is discarded.

5.2.4 Calculation of results

   Ten valid data were measured and the results were expressed as their arithmetic mean. Maximum and minimum values are reported. Calculations are accurate to 1N.

Test results can be expressed in the following form: CCTo = 350N; CCT30 = 250N. Here CCT denotes the vertical compressive strength test of corrugated medium, while the footnote denotes the time between fluting and compression, expressed in minutes.

special attention：

Whether it is a CMT test or a CCT test, it should not be repeated because the shape or vertical state of the paper may have changed when it was subjected to compression, and the results will not be accurate when it is re-tested.

VI、Maintenance and upkeep

1. The relative humidity of the environment where the instrument is used is 65%.

2. Avoid other electrical interference.

3. If the instrument is not used for a long time, it should be regularly energized and run, and the electrical parts should not be affected by moisture.

If you have questions regarding the calibration of your ZY-CWY-A model or need specialized maintenance tips for your fluting rolls, our engineering team is ready to assist. Contact us today for professional support or to request a quote on our latest packaging testing solutions.