Is the material of the timing belt better than polyurethane or rubber?

Good of rubber!!

The rubber timing belt is made of high-quality imported neoprene as the main raw material, and a variety of auxiliary materials for different purposes are added; The skeleton material is imported high-quality fiberglass rope; The toothed surface is protected by nylon 66 high-stretch fabric.

Performance. It has the characteristics of good dynamic flexibility, good crack resistance, excellent ozone performance, aging resistance, heat resistance, oil resistance, wear resistance and so on. Neoprene timing belts are widely used in textile, automobile, chemical fiber, cigarette, papermaking, printing, chemical machinery and equipment; In recent years, the demand for mining and metallurgy, iron and steel machinery, and medical equipment has been increasing.

Polyurethane PU timing belt is made of imported thermoplastic polyurethane material, which has high anti-wear ability, and various types of steel wire cores ensure that it still maintains good movement capacity in transmission, and the production tolerance is small. During the production process, a layer of nylon is applied to the tooth flank and back of the tooth to ensure that the operational specificity of the special application is maintained, and a layer of polyurethane can be added to the back of the belt to prevent corrosion or high loads.

The timing belt drive consists of a closed annular tape with equally spaced teeth on the inner periphery and the corresponding pulley. When moving, the tooth and the tooth groove of the pulley mesh to transmit motion and power, which is a kind of meshing transmission, so it has various advantages of gear transmission, chain drive and flat belt transmission.

Synchronous belt transmission has an accurate transmission ratio, no slippage, can obtain a constant speed ratio, can be precision transmission, stable transmission, shock absorption, low noise, large transmission speed ratio range, generally up to 1:10, allowable linear speed up to 50m s, high transmission efficiency, generally up to 98%-99%.

Transmission power ranges from a few watts to hundreds of kilowatts. The compact structure is also suitable for multi-shaft transmission, with small tension force, no lubrication and no pollution, so it can work normally in the occasion of not allowing pollution and harsh working environment.

Synchronous belt can be divided into neoprene plus fiber rope synchronous belt according to the material, polyurethane plus steel wire synchronous belt, according to the shape of the tooth is mainly divided into trapezoidal tooth and arc tooth two categories, according to the arrangement of the tooth can be divided into single-sided tooth synchronous belt and double-sided tooth synchronous belt.

MAUDEA timing belts have excellent flexural resistance, low elongation, high strength, etc., and also have excellent properties such as oil resistance, heat resistance, aging resistance, ozone resistance, and crack resistance. There are more than 30 models of synchronous belts, more than 1,000 specifications, and supporting synchronous pulleys, in addition to conventional models, we can also design and manufacture special specifications and models of synchronous belts for users to meet the special requirements of users.

In fact, it doesn't say which one is good and which is not, it depends on what machine you use and what material you pull. The environment used is different, and the material required is not the same, and the right one is the best. The characteristics of rubber material and polyurethane material are different, so the environment used is also different, some environments can not use rubber, and some environments can not use polyurethane.

In general, it depends on where you use it, and it is good to choose the right material

Timing belts. It is mainly used in industrial production, and the materials used are very different according to the different products produced, but the material of the Dan wheel of the timing belt can be divided into two kinds, one is polyurethane.

One of the synchronous belts is the rubber synchronous belt, because the material is different, the performance of the product is also different, so which material of the synchronous belt is more easy to use? Look down.

Most of the rubber timing belts are made of neoprene imported from Japan.

As the main raw material, it is made of different auxiliary materials according to the use of the product, and the skeleton material is also made of glass fiber imported from Japan.

Rope. The strength layer of glass fiber is a rope formed by spiral winding of multiple strands of glass fiber along the width of the tape at the node position, which has the advantages of high strength and elongation.

Small, corrosion-resistant, heat-resistant, etc., and then firmly bonded to the node line position by glass fiber on the back of neoprene tape, in short, it is strong and resistant!

Polyurethane timing belts, also known as PU timing belts, are also very common materials, most of which are composed of thermoplastic polyurethane and high-strength steel wire. Thermoplastic polyurethane is a material with high abrasion resistance, while the various types of wire cores inside ensure that it retains good movement during transmission. In the production process of the enterprise, adding a layer of nylon on the tooth surface or back can ensure that the particularity of the operation in special applications remains unchanged, of course, you can also add a thick layer of polyurethane on the back of the belt, which can effectively prevent the phenomenon of high corrosion or high load.

So which kind of timing belt is good?

Polyurethane synchronous belt: Polyurethane synchronous belt is generally made of nylon wire (or steel wire, copper wire) as the tensile body, and polyester is cast, which has the characteristics of oil resistance, impact resistance and beauty.

Rubber timing belt: Rubber timing belt has good flexibility and wear resistance, but PU is not water resistant. Poor reciprocating workability. Poor performance at high and low temperatures. Under static conditions at room temperature, PU polyurethane timing belt is good. On the contrary, the rubber timing belt is good.

As for which kind of timing belt is more easy to use, there is no defined standard at present, and it is good to choose the corresponding material according to your own product. Jinan Anai focuses on industrial belts, pays attention to product quality, and is widely praised by customers at home and abroad!

1. Polyurethane synchronous belt: Polyurethane synchronous belt is generally made of nylon wire (or steel wire and copper wire) as the tensile body, and polyester is cast, which has the characteristics of oil resistance, impact resistance and beautiful appearance. Rubber timing belt flexion:

Good flexibility, water resistance, PU is not water resistant, poor reciprocating workability, poor high and low temperature performance, good wear resistance, good PU polyurethane timing belt under static conditions at room temperature, on the contrary, rubber timing belt is good.

2. Polyurethane TPU synchronous belt is a thermoplastic polyurethane material, which has high modulus, high strength, high elasticity, small permanent deformation, good bending, excellent wear resistance, oil resistance, low temperature resistance, aging resistance, can meet medical and health requirements, and the wear resistance of polyurethane TPU synchronous belt is 8 times that of rubber synchronous belt, which is less hygienic than rubber synchronous belt, and is more suitable for use in food, medical industry, and clean production industry.

3. At present, TPU timing belts have gradually replaced rubber timing belts. TPU timing belts are widely used in computer embroidery machines, beverage machinery and stained glass manufacturing industries. The skeleton materials used are aramid wire rope and non-embroidered steel wire rope.

Synthetic rubber and polyurethane hoses have their own advantages and disadvantages, and it is more important to choose the appropriate material for Hongxiang according to different application scenarios.

In terms of high temperature resistance: synthetic rubber hoses are better than polyurethane hoses. Polyurethane hose is made of polyurethane as raw material, and the temperature resistance of polyurethane is not very good, generally can only withstand the temperature of about -40 degrees to -50 degrees, outside this temperature range, the polyurethane hose will become very brittle, and there is no high temperature resistance, and the high temperature resistance of synthetic rubber hose is relatively good, can withstand high temperatures of about 150 degrees.

Wanton. In terms of water resistance: there is not much difference between the two.

In terms of elasticity: synthetic rubber hoses will be a little better.

In terms of process: the high-temperature resistant synthetic rubber hose is formed at one time by pouring process, and the polyurethane hose is made by mixing polyurethane prepolymer, catalyst, foaming agent, cross-linking agent and other materials through the injection molding process, so the synthetic rubber hose is better in terms of technology.

To sum up, the choice of synthetic rubber hose or polyurethane hose needs to be selected according to the actual application scenario, and no material is necessarily better.

There are indeed certain differences between rubber timing belts and polyurethane timing belts, 1) different materials: rubber timing belts are made of rubber, and polyurethane timing belts are made of polyurethane;

2) Different hardness: the rubber timing belt is relatively soft (about 65 degrees Shore Moon), and the polyurethane timing belt is slightly stiffer (generally the timing belt is 92 degrees Shore Bahus);

3) Different applications: The application of rubber timing belts is relatively more extensive, and the manufacturing cost is also low. Polyurethane timing belts have certain limitations, but due to the characteristics of not producing dust, they are widely used in food, medicine, beverage, electronics and other industries;

4) The production process is different: the production process of rubber synchronous belt is relatively cumbersome, including rubber mixing, mixing, vulcanization and other processes, while the process of polyurethane synchronous belt will be simpler, the TPU type synchronous belt will be directly extruded by the extruder, and the CPU type synchronous belt can be completed by pouring method;

5) Different material characteristics: polyurethane timing belts are more wear-resistant than rubber timing belts, and more resistant to chemicals such as acid and alkali.

To put it simply, each has its own characteristics, polyurethane synchronous belt has not been able to replace the rubber synchronous belt so far, you can look at the automotive synchronous belt, has been using the traditional rubber belt, the reason is that the temperature resistance of the rubber belt can reach more than 140 degrees, and the highest working temperature of the polyurethane synchronous belt is about 80 degrees.

Both of these materials have been purchased by our company, and I personally belong to the company's R&D department, and I have also studied them for a period of time. First, the rubber timing belt purchased was used for a period of time and received complaints from overseas customers and fined a lot of money (the reason can be privately chatted), and then changed to CPU polyurethane timing belt, which has been used until now, almost 6 years, and there has been no problem.

First of all, both of these materials are a type of elastomer. Polyurethane is generally divided into two types: TPU and CPU (as well as MPU), and many people are confused. The CPU is integrated pouring molding, which is strong and wear-resistant.

TPU is thermoplastic, extruded. There are more neoprene rubbers generally used in rubber domestic timing belts.

I saw the difference between these two materials in an authoritative timing belt manual published in Japan before:

Polyurethane timing belt: excellent self-cleaning, good water resistance, temperature range -30 to 70 degrees, excellent oil resistance, excellent ozone resistance.

Neoprene timing belts: poor self-cleaning, poor water resistance, temperature range -20 to 80 degrees, poor oil resistance, poor ozone resistance.

In terms of load and application, the polyurethane timing belt of the CPU casting type is similar to that of the neoprene-based belt, and the belt speed is 60 ms or less. Thermoplastic polyurethane timing belts (TPUs) are mainly used for conveying, and the load capacity is low, and the belt speed is less than 20 ms. (These data are written in the book).

**In terms of imports, imported polyurethane timing belts are more expensive than rubber, and the quality of domestic products is good and bad, and the quality of different products in CPU formulas varies greatly, and it is not visible in a short time. TPU depends on the quality of raw materials.

The rubber timing belt is a combination of cord and rubber, the polyurethane timing belt is a steel cord, the rubber timing belt is soft and less wear-resistant, and the polyurethane timing belt is hard and wear-resistant, but the guide line seems to be inferior to the rubber timing belt.

Urethane timing belts and rubber timing belts are meshed with the inner tooth shape to transmit power, and the polyurethane timing belt is composed of a glass fiber tensile layer, a neoprene tape back, a neoprene tape tooth, and a nylon cloth layer; Industrial rubber timing belts are annular belts with steel wire rope or glass fiber as a strong layer and covered with polyurethane or neoprene, and the inner periphery of the belt is made into a toothed shape.

The two kinds of synchronous belts transmit power through the toothed occlusion of each other, which is relatively accurate, the transmission is stable, and the noise is low; Polyurethane has superior wear resistance, the material is harder than rubber, the size of polyurethane products is relatively small, the size deviation of rubber timing belt specifications is large, and the large size is used on large equipment;

The simplest difference between polyurethane timing belts and rubber timing belts is that PU is generally based on steel wire cores, which are slightly stiffer (generally synchronous belts are at 92 degrees Shore Rich); The rubber timing belt is made of rubber, the core of the glass fiber rope is the mainstay, and the hardness is slightly softer At about 65 degrees, the application of the rubber timing belt is relatively more extensive, and the relatively small tooth shape can also be done, as fine as printer equipment, precision small transmission equipment, sand making machine, bulldozer, etc. Polyurethane timing belts have certain limitations, they need to be made into relatively large tooth shapes, and small toothed steel wire cores cannot be made, but because they do not produce dust, they are widely used in food, medicine, beverage, electronics and other industries.

Rubber timing belt: Rubber timing belt is made of high-quality synthetic neoprene imported from Japan as the main raw material, and a variety of auxiliary materials for different purposes are added; The skeleton materials are all high-quality fiberglass ropes imported from Japan; The toothed surface is protected by nylon 66 high-stretch fabric. It has good dynamic flexibility, good crack resistance and excellent ozone performance.

1. Glass fiber strength layer: It is a rope composed of multiple strands of glass fiber, which is wound in a spiral along the width of the tape at the section position of the tape. It has high strength, low elongation, good corrosion resistance and heat resistance.

2. Neoprene tape back: It firmly bonds the glass fiber on the section position and plays the role of protecting the strong layer.

3. Belt teeth: It is composed of nylon cloth with good wear resistance and neoprene with high shear strength and appropriate hardness, which requires precise molding and precise distribution position to properly mesh with the tooth groove of the pulley. The tooth root should be kept at a specified distance from the pitch line, and the pitch should not change when bending.

Polyurethane (PU) Timing Belt: Polyurethane timing belt is made of thermoplastic polyurethane material, which has high wear resistance, and various types of steel wire cores ensure that it still maintains good movement capacity in transmission, and the production tolerance is small. The open PU timing belt is reliable and dimensionally stable.

During the production process, a layer of nylon is added to the tooth surface and back of the tooth to ensure that the operation specificity in special applications is maintained, and a layer of polyurethane can be added to the back of the belt to prevent corrosion or high loads.

Physical characteristics: anti-wear, durable;

Good stability, high transmission accuracy of straight line and angular deviation;

Low elongation; Low noise;

High transmission efficiency, suitable for high load and high frequency use;

Chemical characteristics: not easy to hydrolyze, oil resistant;

Not affected by ozone;

UV resistant, not easy to age;

Strong acid resistance and alkalinity;

Operating temperature -30 -110