In China, there are about 400 more than the production of plastic rolls, but most of them around the individual small factory workshops, these plants are small, single product, poor technology, which is characterized by low price, supply facilities, printing Cots products to low-end printers can support and renovation, the output value of only a few hundred million. So Cots industry in China is still lagging behind the technological level and production levels. But although China's rubber roller industry still has great development trend, especially the rise of the printing industry have accelerated the development of the rubber roller industry. Many printing companies are required to produce a large number of cot job, let's look at the information on the rubber roller. Printing rollers are the main products of the printing industry, its main characteristics: Polyurethane Rollers colloids have sufficient surface viscosity. Therefore Cots good ink transfer and ink holdout in the printing process, ink performance can be a good parent to ensure high-quality printing. · Have excellent physical properties, long-term use will not make Cots harden, aging, and tear resistance, good resilience, excellent wear resistance. Long life, easy to save, long-term storage does not affect the results. Cots natural rubber and synthetic rubber roll unbearable pressure, high-speed rotary machines, high temperature, high humidity of the production environment can also operate as usual no effect (polyurethane rubber roller tensile strength, abrasion resistance natural rubber 3 times -5 times roll. Compression set, resilience, abrasion resistance than synthetic rubber NBR rubber rollers roll better performance. · high-grade rubber roller from the appearance of bright color, the colloid surface smooth and delicate, core bonding adhesive and stick firmly cot size will not be much change at different temperatures, able to adapt to hot and humid environment or cold and dry climatic conditions · printing rollers have a good affinity for water: Since Specially formulated polyurethane material is added, it changed its internal molecular structure, to introduce and increase the water has a good affinity factor, increase the material's resistance to surface tension of the water and surface water absorption, so use as dampening water, Cots alcohol series, with excellent results. · printing rollers with excellent chemical resistance, ink and printing method is suitable for all types of very suitable for the coating rubber roller and UV inks rubber roller, etc. (especially for diesel , petrol, dampening oil, kerosene, salt solution such as a good solvent resistance.) * high-grade rubber rollers for easy cleaning. In the production is very easy to convert shades of color ink as some of the press by Roller, it . miscellaneous features hair sticky paper to the printing plate, dust and release Zhang dusting, etc., does not require frequent handling clean, easy to produce common Cots printing rollers such as faults and reasons: 1. Cots heated thermal aging It will accelerate the desulfurization, thermal aging, the surface sticky, softened, or even crack into orange striated. Cots can only be replaced at this time. 2. colloid block out the ink transfer process early colloids dried dry ink the film because of its ductility decreased during rolling in, will make the colloid surface ink film with cracks and damage, resulting in a colloidal off the block occur. The main reason for the occurrence of early drying of the ink is drying agent added to the ink, printing the ink dry faster ink, no ink roller cleaning as required, so that the ink in the long-term use on the rubber roller dry phenomenon occurred. printing rollers processing temperature is too high, the surface is easy to carbonation, short print on The method will be off the block phenomenon excessive printing pressure adjustment, when the machine is idle, idle protection if improper or untimely, will accelerate the destruction of the surface of the roller to solve this problem: the occurrence of cot off the block can be replaced Troubleshooting the resulting printing. 3. glazed surface in the printing process, the ink connection inorganic organic compound, and the fountain solution hydrocolloid, exfoliated filler in paper, paint in the ink roller surface layer of "bright film," so that the ink roller surface glass ink transfer roller surface degradation 4. produce crystalline compound 5. Roller expansion: In addition to the heat of the reasons, the main reason is the use of improper cleaning agents, so that colloidal swelling occurred Solution: Choose the appropriate cleaning agent (swelling often makes Cots organic solvents:.. MEK acetaldehyde methyl ketone, trichlorethylene, acetone, cyclohexanone methane, bananas, water; swellable organic solvents: alcohol, kerosene, gas oil, roller cleaning agent) 6. Circumferential Streak: In addition to the crystalline compound can cause similar outer circumferential streak on hard dry ink roller skin and trash during operation in scratching the surface of soft rubber roller to form a circumferential streak. You must use ink remover to remove dead dry skin ink. 7. The ink fountain roller stick: chrome roll after adsorption enables the ink fountain solution sufficiently isolated, but an excess of dampening fluid, acidic dampening solution is too strong will to increase ink emulsion ink will be as emulsified Back to return to the water fountain roller, the fountain roller can cause adverse fountain ink adsorption, local water minor problems. You must promptly remove the ink fountain roller. While adjusting the size of the amount of fountain solution and its components. 8. splash water roller ends: the printing process by version two water droplets dripping water roll the printed surface of the substrate, the causes of this are: water fountain roller and the metering roll length difference exceeds the allowable range, the length difference larger than the 0.5mm; the corners of the fountain roller handle, which is greater than the roundness of the corners of 0.5mm. When we know the relevant information of printing rollers, we use the time we must know how to use, how to maintain the information and info More Cots and printing rollers, please pay close attention Dongguan-ho Cots plant