What are the characteristics of polyurethane rubber rollers? Polyurethane rubber roller lagging form

Polyurethane rubber rollers are suitable for all kinds of printing machinery, especially medium and high-end printing machines, and have many superior characteristics.

1.The appearance is bright in color, the colloidal surface is fine and smooth, and the colloidal material and 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 southern printing workshop and the cold and dry climate conditions of the north.

2.The hardness index of polyurethane rubber roller is wide, from HSA15 to HSD80, which can meet the hardness requirements of different types of printing machines.

3.The polyurethane rubber roller has sufficient surface viscosity, which can ensure that the rubber roller has good ink transfer and inking performance in the printing process, and its good ink philophilic performance can ensure high-quality printing.

4.Polyurethane rubber 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, dampening solutions, and cleaning agents.

Polyurethane rubber rollers are also suitable for UV ink rubber rollers and varnish oil rubber rollers, especially for boiling water, diesel, gasoline, lubricating oil, kerosene, toluene, alcohol and salt water solutions have good solvent resistance. However, it is not resistant to acetone, ethyl acetate and strong acids and bases.

5.Polyurethane rubber roller has excellent physical properties, long-term use of rubber roller will not harden, aging, and tear resistance, good resilience, excellent wear resistance, so long service life, easy to preserve, long-term storage does not affect the use effect; It can withstand high pressure, high speed, high temperature and high humidity production environment. Experiments show that the tensile strength and wear resistance of polyurethane rubber rollers are 3 times and 5 times that of natural rubber rubber rollers. Compression set, good resilience; The service life of polyurethane rubber roller is more than 1 times that of general rubber roller.

6.Polyurethane rubber roller has excellent hydrophilicity, so it can be used as a rubber roller for water and alcohol dampening system, and the effect is very good.

7.The polyurethane rubber roller is easy to clean, easy to convert dark and light inks, and convenient for printing and color change.

Summary. The polyurethane rubber roller lagging formula roughens the surface of the rubber roller core to increase the adhesion area between the rubber roller core surface and the lagging adhesive.

The polyurethane rubber roller lagging formula roughens the surface of the rubber roller core to increase the adhesion area between the rubber roller core surface and the lagging adhesive.

Sandblasting treatment: The roughly treated rubber roller core is sandblasted, and the sandblasting will select sand with different properties according to the material of the rubber roller core. The sandblasting is to make the surface of the rubber roller rougher, and the glue and the core are better bonded after the glue.

4.Lagging of rubber roller cores after the above treatment is carried out according to the requirements of customers.

The hardness of the polyurethane rubber roller is usually expressed by the "shore" hardness, which refers to the depth at which the hardness tester needle stays on the surface of the material under a specified pressure. 90 Shore A indicates that the hardness of the polyurethane rubber roller is 90, and A is the pressure level used in the hardness tester. Shore A hard cavity bridge is a hardness measurement standard for elastic materials, which is usually used to measure the hardness of materials such as polyurethane, silicone, vinyl, rubber, plastic, etc., with higher values indicating that the material is harder or more difficult to deform.

As a result, 90 Shore A's polyurethane rollers are stiffer and more difficult to deform than 70 Shore A's polyurethane rollers.

The 90 hardness of the polyurethane rubber roller means that the hardness value of the polyurethane rubber roller is 90 degrees. Hardness is a mechanical indicator of the material, by applying a certain pressure on the material, measuring its compressive strength to represent the hardness of the material. In the polyurethane rubber roll manufacturing industry, 90 degree hardness is usually a stiffer rubber roller, which is suitable for higher printing speeds and higher strength requirements.

With a lower hardness value of 70 degrees, it is suitable for slower printing speeds and lower disc pressures. At the same time, different ink disc materials and printing materials will also affect the selection and use of polyurethane rubber rollers. It should be noted that there may be differences in the standards and hardness values of polyurethane rubber rollers from different manufacturers, so attention should be paid to ensuring that they can adapt to the requirements of printing equipment and meet the quality requirements of printed products when selecting rubber rollers.

It is worth mentioning that in addition to the degree, there are also Lloyd's Register hardness evaluation methods such as Shore A and Shore D, which are used as common standards for the hardness evaluation of solid materials.