Introduction To The Advantages And Disadvantages Of Various Types Of Silicone Rubber Rollers And Process Formulas

- Aug 10, 2020-

Rubber roller technology has always been monopolized by foreign countries, and now a group of domestic rubber roller companies have emerged, but the technology is relatively weak and the products are uneven. Now the price of rubber raw materials is also fiercely high, and profits are compressed to a low point. Ruibo Silicone Rubber Products reminds all the rubber friends in the rubber roller industry, in your mind, objectively speaking, is the rubber roller a good direction? It is worth to work hard for it now? Now there are more rubber roller companies, but If you are a small workshop, is it good or bad for your own future development to switch to a job? The following editor knows all the rubber rollers used in textile, printing, food processing, metallurgy and other industries are all shown below.


   To understand the rubber roller, you must first know its material. The rubber rollers mentioned in the editor below are all industrial rubber rollers. Industrial rubber rollers are generally roll-shaped products made of metal material as the core and covered with rubber. The rubber material covered is different, the characteristics of the rubber roller are also different, and the purpose is also different.


  Industrial rubber rollers can be divided into natural rubber rollers, butyl rubber rollers, nitrile rubber rollers, neoprene rubber rollers, ethylene-propylene rubber rollers, fluoro rubber rollers, polyurethane rubber rollers, silicone rubber rollers, carbon fiber rollers, etc. according to their materials.


 


a. Let's talk about polyurethane rubber rollers first: Generally, polyurethane elastomer rubber rollers are produced by casting method, that is, the casting glue that meets the process and technical requirements is written into the mold, and it is made by curing, demoulding and post-processing for a certain period of time. Due to the various specifications of the rubber rollers, the rubber rollers of different sizes need to be equipped with several sets of molds of the same size. The appropriate molds are numerous and complicated. You can choose one that does not require a mold and can produce various sizes of rubber. The technology and equipment of the roller can directly observe the pouring process. No mold, no need to store, cost saving energy, shortcomings found in the pouring process can be compensated in time, saving material, eliminating grinding processing, fast response speed, short processing time, small occupation area, and high production power.


  Do you have this question: How long does the prepolymer heat up and how much should the temperature be controlled? How long does the Mocha heat up and how much should the temperature be controlled? After pouring is completed, how many degrees should be heated in the oven and how long will it take?


   What I want to say is: This material supplier generally provides this information. Generally, the prepolymer is completely melted at a temperature of 90 degrees, about 8-12 hours; MOCA can be directly heated to melt with an electric furnace (an oven can also be used, be careful not to heat it too much); mix evenly and pour into the cavity until it is not sticky Mold, curing (1-1.5 hours depending on the size of the product) ps: I really don’t know how to buy a polyurethane elastomer manual!


b. Nitrile rubber roller I think everyone should be well aware of its excellent oil resistance, high abrasion resistance, good heat resistance, and strong adhesion; the main disadvantage of nitrile rubber roller is poor low temperature resistance and poor ozone resistance , Inferior electrical performance, slightly lower elasticity; so it is often used in printing, printing and dyeing, papermaking, packaging, chemical fiber, plastic processing and other equipment and other occasions that are exposed to oil and aliphatic hydrocarbon solvents. The editor reminds everyone: Before making the nitrile rubber roller bearing iron core, the bearing core shell (or iron core) and the nitrile rubber tube are strictly inspected, and the new rubber roller bearing iron shell and iron core and the old rubber roller bearing iron shell and The iron core undergoes strict inspection and acceptance according to the standards issued by the ministry, and rejects unqualified products.


c. Silicone rubber roller: using its high temperature resistance, high pressure resistance, ozone resistance, chemical inertness and non-adhesion to plastics, used for processing hot-bonded products, such as polyethylene calendering, embossing, printing and dyeing, and film and fabric Coating adhesives, plastic compounding, corona treatment and other machinery, also used as the release roller on sugar production and packaging machines and non-woven fabric manufacturing.


 


  About the silicone rubber roller process: Silicone rubber roller molding process: extrusion winding molding; Silicone rubber roller vulcanization process: direct steam vulcanization.


d. Fluorine rubber roller: It has super high heat resistance, oil resistance, acid and alkali resistance, gas permeability resistance, electrical insulation, aging resistance, flame resistance, abrasion resistance and other functions. It is also used for special coating equipment. .


  Ps: Fluorine rubber roller (70SA-90SA) formula material:


 


  Viton B-50--Fluorine rubber


  Diak #3---vulcanizing agent.


  Calcium oxide--acid absorbent


  MT black, ASTM N-990---carbon black


  E. Carbon fiber roller: Because this type of rubber roller is usually light in weight, high in strength, and high temperature resistant. Therefore, it is widely used in special industries such as wide-format films.


f. Butyl rubber roller: high resistance to chemical solvents, good heat resistance (170°C), excellent acid and alkali resistance, if you want to improve abrasion resistance, you can add abrasion resistance agent (but pay attention to acid and alkali resistance. ), suitable for color printing machinery, tanning machinery, coating equipment, etc. It can be made into tannery roller, printing roller, coating roller and so on.


j. Neoprene rubber roller: This type of rubber roller has excellent abrasion resistance, higher fire resistance, oil resistance, aging resistance, better heat resistance, and acid and alkali resistance. It can be made into printing rubber rollers and iron printing rollers. , Tannery roller, coating roller, etc. Used for printed board corrosion machines, plastics, tanning, printing, food printing, general coating machines and other equipment.


  


h. EPDM rubber roller: It has excellent ozone aging resistance and weather resistance. It can work for a long time under the ambient temperature of -65℃—140℃. It has excellent insulation performance. The rubber roller can be used for plastic printing machinery and manufacturing. Leather machinery and other general fields. Tannery rollers and printing rubber rollers are more commonly used. (Related epdm product recommendation: Epdm sealing tape   thermoplastic EPDM rubber products)


  The key to the ethylene propylene rubber roller is the selection of materials: the experiments done by yourself will be very helpful to the selection of materials for your future product development:


EPDM only has those few indicators: ENB third monomer content, ethylene content, Mooney viscosity; molecular weight distribution; choose different indicators according to your different requirements: this is also related to product structure, product thickness and filling volume: do low pressure change, just Choose high viscosity: For high heat resistance, choose low ENB: For high strength, choose high ethylene: Choose low ENB for chemical resistance.


 


   The formula of the ethylene propylene rubber roller should pay attention to the following: color requirements, hardness requirements, and molding methods are OK.


 


k. Natural rubber roller: This type of rubber roller has excellent elasticity and mechanical strength, and good alkali resistance. It is often used in compression rubber rollers in papermaking, leather, textile, packaging and other equipment and traction rubber in metallurgy, mining and other industries Roll.


  L. Ethylene propylene rubber rubber roller: It has heat resistance, aging resistance, stability, good weather resistance, ozone resistance and excellent water resistance and chemical resistance. It can be used in printing and dyeing, papermaking, etc.