Moisture content and performance of wet water kraft paper tape

The moisture content of wet water kraft tape paper has a great influence on printing. If the moisture is too low, the paper will be brittle, and static electricity will easily occur during printing. Today, Baijin wet water kraft paper tape manufacturers will introduce to you what factors affect the moisture content of kraft paper tape.

If the moisture content is too high, it will make it difficult for the ink to dry, and the change of moisture will also have a great impact on the various properties of the paper. With the change of moisture, its basis weight, tensile strength, folding resistance, etc. will change. , The paper size of wet water kraft paper tape will also expand and contract, and even curl, curl, wrinkle, and ruffle.


All kinds of wet water kraft paper tape paper have an optimal moisture content value. Under this value, the various properties of wet water kraft paper tape paper are in a good state. The best moisture content of the cast coated newspaper board is 7% ± 2%, 4%-7% for white cardboard, 8%±2% for single-sided coated white cardboard. This is the moisture content of the wet water kraft tape paper when it leaves the factory.


During storage in the printing plant, wet water kraft tape paper is used as a moisture-absorbing material. He can absorb moisture from the air. The rate of absorption depends on the relative humidity and temperature of the air. It can also transfer ten to the air and lose moisture. The rate depends on the moisture content of the wet water kraft paper tape and the ambient temperature and humidity. When the moisture absorption rate and the wet water rate are the same, the wet water kraft paper tape paper is in equilibrium with the air, and the moisture content in the wet water kraft tape paper remains unchanged. In this case, the moisture content of the wet water kraft tape paper is called equilibrium moisture.


Relative humidity refers to the ratio of the moisture content in the air at a certain temperature to the moisture content that the air can hold when saturated at that temperature. The same wet water kraft paper tape paper has different equilibrium moisture under different relative humidity.

wet water kraft tape paper

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