The Features and Appllications of Polyurethane Rollers

The Features and Appllications of Polyurethane Rollers

Features of polyurethane roller

1. The colloid for polyurethane rollers has sufficient surface viscosity, which can ensure that the rubber rollers have good ink transfer and ink holding performance during the printing process, and its good ink affinity can ensure high-quality printing.

2. The appearance is bright, the colloid surface is fine and smooth, and the colloid material and the mandrel are firmly bonded. The size of the rubber roller is strictly controlled, and the size will not change greatly under different temperature and humidity conditions. It can adapt to the high temperature and high humidity environment of the printing workshop in the south and the severe cold and dry climate in the north.

3. Polyurethane rollers have good chemical properties and are suitable for various types of inks and printing methods. It has special resistance to solvent components in various inks, fountain solutions, and cleaning agents. Polyurethane rollers are also suitable for UV ink rubber rollers and varnish rubber rollers, etc., especially have good solvent resistance to boiling water, diesel oil, gasoline, lubricating oil, kerosene, toluene, alcohol and saline solution. But it is not resistant to acetone, ethyl acetate and strong acid and alkali.

Application characteristics of polyurethane roller

1. The appearance is bright in color, the surface of the colloid is fine and smooth, and the colloid material and the mandrel are firmly bonded. The size of the rubber roller is strictly controlled

The size will not change greatly under different temperature and humidity conditions. It can adapt to the high temperature and high humidity environment of the printing workshop in the south and the severe cold and dry climate in the north.

2. Polyurethane rollers have a wide range of hardness indicators, from HSA15 to HSD80, which can meet the hardness requirements of different types of printing machines for rubber rollers.

3. The colloid for polyurethane rollers has sufficient surface viscosity to ensure that the rubber rollers have good ink transfer and ink holding performance during the printing process, and its good ink affinity can ensure high-quality printing.

4. Polyurethane rollers have good chemical properties, especially good solvent resistance to diesel, gasoline, lubricating oil, kerosene, alcohol and saline solution.

5. Polyurethane rollers have excellent physical properties. Long-term use of rubber rollers will not harden or age, and they have good tear resistance, rebound performance, and excellent wear resistance, so they have a long service life and are easy to store. Affect the use effect; able to withstand the production environment of high pressure, high speed and high humidity. Experiments show that the tensile strength and wear resistance of polyurethane rollers are 3 times and 5 times that of natural rubber rollers; the compression set and resilience are better; the service life of polyurethane rollers is more than 3 times that of ordinary rubber rollers.

6. Polyurethane rollers have excellent hydrophilicity, so they can be used as rubber rollers in water and alcohol dampening systems.

7. Polyurethane roller has high strength and high tear resistance, so it is resistant to shearing and wear.

If the polyurethane roller is newly made, the internal structure is not very stable, and it cannot be used immediately, and the luster will reduce the service life; although the polyurethane roller has the advantages of high strength and high tear resistance, it also needs its Storage location, the storage of general polyurethane rollers needs to be covered with plastic film after cleaning, and then the colloids should be sealed and stored without heavy pressure or random placement. Correct storage can also enhance the service life of polyurethane rollers.

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