What are the factors that affect the service life of the tag coated paper?

The factors that affect the service life of the tag coated paper are many, mainly including the following aspects:

First, material characteristics and production process

1. Cellulose, hemicellulose and lignin content:

The main components of coated paper are cellulose, hemicellulose and lignin. These components are prone to chemical changes in specific environments, such as hydrolysis and oxidation, which affect the strength and durability of the paper.

Cellulose has the properties of hydrolysis and oxidation, under the influence of light, high temperature, high humidity, acid base and other factors, hydrolysis and oxidation will occur, resulting in yellow and brittle paper.

Hemicellulose has low polymerization degree, poor stability and easy hydrolysis. Lignin is easily oxidized, and the paper turns yellow and brittle after oxidation.

2. Production process and raw material selection:

The production process and raw material selection of coated paper will also affect its service life. For example, if the use of environmentally friendly non-wood fiber raw materials (such as straw, bagasse, etc.), you can reduce the pressure on forest resources, but in the production process still need to strictly control the discharge of wastewater, exhaust gas and waste residue to reduce the impact on the environment.

Gluing and coating in the manufacturing process may also introduce chemicals that affect the durability of the paper.

Second, environmental factors

1. Illumination:

Ultraviolet light can break the C-C and C-O bonds in the lignin, causing the paper to become brittle. Therefore, the tag coated paper exposed to the sun for a long time is more susceptible to aging.

2. Temperature and humidity:

High temperature will speed up the internal reaction speed of the paper, which is not conducive to the preservation of the paper. When the humidity is too high, the paper will absorb water and provide conditions for the hydrolysis of cellulose and hemicellulose. At the same time, the dry and wet interface of the paper will decolorize the paper. Too low humidity will make the paper brittle, resulting in permanent deformation.

The change of environmental humidity will also affect the dimensional stability of coated paper, resulting in paper warping, deformation and other problems.

3. Ph and pollutants:

Acidic gases in the atmosphere (such as SO2, NO2) will cause the acidification of the paper after being absorbed by the paper, reducing the pH value of the paper, thus accelerating the aging process of the paper.

Organic matter released in the room (such as formic acid, acetic acid and lactic acid, etc.) will also reduce the pH value of the paper, causing cellulose degradation.

Third, use and maintenance

1. Usage modes:

The mechanical stress (such as folding, bending, tearing, etc.) suffered by the tag coated paper during use will also affect its service life. Frequent or improper use will accelerate the aging process of paper.

2. Storage conditions:

The storage environment also has an important impact on the service life of the tag coated paper. It should be stored in a cool, dry and well-ventilated place, away from direct sunlight and damp environment.

During the storage process, avoid pressing heavy objects to avoid deformation or damage to the paper.

Fourth, other factors

Microbial contamination:

Paper is susceptible to microbial contamination during storage and use. The mold secretes cellulase, which catalyzes the hydrolysis of cellulose molecules and causes the paper to age.

In summary, the factors that affect the service life of tag coated paper are many, including material characteristics and production process, environmental factors, use and maintenance methods, and microbial pollution. In order to extend the service life of the tag coated paper, it should be controlled and improved from many aspects.