Molybdenum Disulfide, as an Additive, Improves Properties of Nylon Plastic

 Nylon plastic is in the family of synthetic polymer and can replace bronze, brass, steel and aluminum as wear-resistant parts of equipment. It has good toughness, strong wear resistance, oil resistance, shock resistance, tensile and bending strength and good dimensional stability, which is mostly used in fibre cable, films, flooring, rubber reinforcement and shapes like car parts and electrical equipment.

Molybdenum disulfide (MoS2) is used as solid lubricant and plays a very important role in industrial applications. It has a very low friction coefficient (0.03-0.06), high yield strength (3.45MPa), can be used under high temperature (350℃), various ultra-low temperature conditions, or even worked normally at 1200℃ under vacuum conditions, especially has a very good lubrication effect in high-speed mechanical parts. 

MoS2 is added as an additive to nylon materials to improve sliding and friction properties and increase the tensile strength and wear resistance of this material that is still the best choice for many bearing and wear applications.

Nylon 66+MOS2(ash black): with the addition of molybdenum disulfide, nylon 66 provides higher rigidity, hardness and dimensional stability and improves the material bearing and wear resistance as a result of the additive's structure, and its nucleating effect.  

PA6+MOS2 (ash black): adding molybdenum disulfide powder can improve the bearing capacity and wear resistance of unmodified cast nylon without affecting the erosion and fatigue resistance. It is very widely used in manufacturing gears, bearings, star wheels and sleeves.

The properties of nylon plastic nylon include good sunlight resistance power, high melting point, good colour fastness nature, high resistance against insect, bacteria, fungi, rot and other chemicals, compact modular structure, high stretching power and so on. 

The MoS2 provided by Chinatungsten Online features uniform and concentrated distribution of particle size, better dispersibility to make it can better display product characteristics in plastic products. Our regular particle sizes are super fine, technical fine, technical grade and large particle. 

If you have any inquiry of molybdenum disulfide, please feel free to contact us:

Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

Current Density Is Important to Service Life of Molybdenum Electrode

Current density is one of the most important parameters for designing the glass electric melting furnace, which is also a very important factor that affects the service life of molybdenum electrode. Controlling the right current density helps the extension of electrode’s working life. 

Molybdenum electrodes are simultaneously subjected to the combined effects of electricity, high temperature and corrosion during smelting. Chemical corrosion and electrochemical corrosion are unavoidable. The experimental analysis shows that the corrosion rate of the electrode is closely related to the current density in the same molten glass.

When the current density is low, the temperature of the moly electrode is lower than the molten glass’s. As the current density increases, the temperature of the electrode reaches or even exceeds the temperature difference of the molten glass. If the relationship between the corrosion rate and the temperature in the medium alkali glass is quantitatively detected, it will be found that the higher the temperature, the greater the corrosion rate. Based on the results of various research experiments, it can be judged that if the current density increases and the temperature of the electrode area rises, it will affect chemical reaction process of the electrode, change flow state of the glass in the electrode area, and finally corrode molybdenum electrode rapidly.

The temperature of electrode is proportional to the current density, and its critical current density value can be 0.4-0.7A/cm2, according to a large number of production experiments. Under this current density, 8-10mm thickness of electrode can work for more than 2 years. The maximum allowable current density is about 2-3A/cm2. In order to make the corrosion less, if it is alkali-free glass, the current load should be smaller. When the current density is less than 1.00A/cm2, the molybdenum electrode can better resist the corrosion of the molten glass. On the contrary, when the current density is higher than 1.00A/cm2, the corrosion rate will naturally increase, and bubbles will be generated on the interface between the molybdenum electrode and the molten glass.

In short, controlling the current density reasonably in glass melting is essential for the application of molybdenum electrode. Chinatungsten Online provides high-purity and high-quality molybdenum electrode worldwide. 

If you have any inquiry of molybdenum electrode, please feel free to contact us:

Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

Molybdenum Electrode: Ideal for Glass All-electric Melt Furnace

The material of electrode is of importance for the improvement of glass melting technology. Despite the shapes of electrode (usually rod and plate), the types of glass and compositions of glass melt are various, general requirements can still be formulated for the electrode material applied in glass all-electric melt furnace as following: 

1. The current density carried on the electrode has a great loss to the electrode and its material requires having good electrical conductivity to reduce power consumption.

2. The electrode material will not be oxidized at 400℃ or below in the air environment.

3. The material has good mechanical strength when the operating temperature is up to 1700℃.

4. Regardless of oxygen partial pressure and current load, the material can withstand the temperature up to 1700°C. 

5. The products of corrosion of electrode material is not permitted to cause any defects to the finished glasses, such as areas of discoloration, particle inclusions and streaks. 

6. Bubbles, which occur as glass defects in finished products, are not permitted to be produced in reactions between the electrode material and glass melt  

7. The glass melt contains a lot of highly corrosive ingredients. As a result, the electrode material is required to be corrosion resistant. 

8. The material with less impurities does not work with refractory materials, ensuring long service life. 

9. Low expansion coefficient, low contact resistivity with glass.

Metal molybdenum is most frequently used electrode material. Electrodes made of molybdenum with a purity of ≥99.95% are widely applicable in the glass melting industry. In addition to lead glass, it can be used to melt most glasses, such as refractory glass, glass with high viscosity, and glass with high volatile components. The use of molybdenum electrode has played a great role in the utilization of second energy in the glass industry.

If you have any inquiry of molybdenum electrode, please feel free to contact us:

Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

Molybdenum Disulfide As a Lubricant in Rail Transit

The lubrication in the rail traffic is mainly for wheeltrack, moving parts in locmotives, motor cars and vehicles, and bow net. Molybdenum disulfide (MoS2) is a good lubricating material thanks to its frictional characteristics, physical and chemical properties. 

Since the advent of rail transit, the wear of rails and rims has become a concern. When the train passes the curve, due to the action of inertial force and centripetal force, the wheel flange and the rail side will roll and slide, causing severe wear on the rail side; and when passing through a straight track, the conicity between wheel tread and wheeltrack will cause hunting, resulting in wear between the wheel rim and the inner edge of the track inevitably.

By taking some measures, such as using high-strength steel, making wheel flange matching more reasonable, adjusting track parameters, and carrying out reasonable lubrication can effectively reduce wheeltrack wear. Among them, reasonable lubrication can not only reduce wear by 30% to 80%, save fuel by more than 2%, but also help the safe driving of the vehicle due to the reduction of the friction coefficient between the wheel flange and the rail side.

There are many ways of rail lubrication: artificial oiling trolleys, track pulley, ground rail lubricators, vehicle-mounted lubrication devices, etc. Lubricants used in the lubrication devices include three types: lubricating oil, grease and solid lubricating stick. 

MoS2 is a good solid lubricant. The low friction and easy cleavage are intrinsic to the material and a result of its crystal structure. Its formed solid lubricating film lubricates sacrificially by transferring lubricant between the two mating surfaces, which helps to reduce wear and coefficient of friction, and can withstand an average load of 108Pa or more to prevent the lubricating film from breaking and causing seizure. For example, the thickness of 2.5μm molybdenum disulfide film can withstand pressures above 2800MPa.

If you have any inquiry of molybdenum disulfide, please feel free to contact us:

Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

TZM Hot Runner Nozzle Is the Best Solution for Plastics Industry

Hot runner system is a molten plastic conveying unit used with an injection mould, bringing the molten plastic from the barrel of an injection molding machine into the cavities of the mould under high pressure, and then cooling and solidifying to obtain various products of plastics industry. With its advantages of fast production speed, high efficiency, diverse product shapes and precise dimensions, hot runner system enables the implementation of a very broad range of applications.

The nozzle, as a very important component of the system, can be heated to ensure the plastic maintains the temperature continuously through the mold. Many plastic products would require very high precise processing temperatures. If the temperature is too high, the material may be damaged; if the temperature is too low, the product will harden and cannot flow optimally into the mold. Therefore, the heat transfer in the hot runner nozzle is very important.

In conventional metals such as steel, the thermal conductivity is insufficient. Although copper has a high thermal conductivity, it cannot withstand the abrasion of plastics. TZM (Titanium-Zirconium-Molybdenum) has an extremely high thermal conductivity of 140W/mK, and has excellent temperature and corrosion resistance and processing mechanical properties. It can meet the requirements of long-term use of hot runners at high temperatures. Moreover, with their large variety of melt-channel diameters, nozzle lengths and gate geometries, the TZM nozzles can produce various kinds and shapes of plastic products. 

In addition, TZM is easier to machine than titanium. If a particularly high level of material hardness is required, we can further harden TZM after machining. Therefore, the TZM material is the most suitable material for making hot runner nozzle. 

The advantages of TZM hot runner nozzle:

1. Uniform temperature management

2. Optimal thermal separation

3. Easy installation and security against leaks

4. Outstanding insulation in the front nozzle area

5. Applications up to a process temperature of 450°C

6. Up to 50% energy saving

If you have any inquiry of TZM rod, please feel free to contact us:

Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.