月: 2023年7月

What Is a Phthalate Resin Coating?

Phthalate Resin Coating is a highly durable coating.

Another name for Phthalate Resin Coating is Alkyd Resin, and this coating is composed of two main components: phthalic acid and polyalcohols. The choice of polyalcohols, polybasic acids, and denaturants yields resins with widely differing properties, making it possible to create a wide variety of paints for different fields of use.

Uses of Phthalate Resin Coatings

The distinctive properties of this paint are its high weather resistance and the fact that it does not discolor or deteriorate over long periods of time. It also has excellent chemical resistance, minimizing damage caused by chemicals and acidic substances.

Taking advantage of such points, it is mainly used for buildings, vehicles, ships, and machinery.

1. Exterior Walls and Roofs of Buildings

Phthalate Resin Coating is also commonly used on the exterior of buildings. Because of their durability and weather resistance, they do not discolor or deteriorate over long periods of time. In addition, the paint’s wide variety of colors and finishes help maintain the building’s appearance.

2. Vehicles

Phthalate Resin Coating is also used in the painting of vehicles such as automobiles and railcars. The paint’s curing reaction improves durability and abrasion resistance, thereby protecting the vehicle’s appearance. In addition, the paint’s color choices and gloss can be adjusted to achieve unique designs and finishes.

3. Marine Vessels

Phthalate Resin Coatings are also suitable for marine vessels that need to withstand the marine environment. They provide protection from seawater and UV rays and improve the durability of the hull. They are also resistant to sea breezes and chemicals, thus preserving the appearance of ships for a long period of time.

4. Protection of Metal Surfaces

Tartaric acid resin coatings are also effective in protecting metal surfaces. Metal is vulnerable to oxidation and corrosion, but Phthalate Resin Coating can protect metal surfaces and increase their durability.

5. Plastic Products

Phthalate Resin Coating is also ideal for plastic products. Plastics have low durability and abrasion resistance and require protection by paint. Phthalate Resin Coatings adhere to plastic surfaces and provide excellent protection.

The versatility of paint finishes also makes it possible to give plastic products an aesthetically pleasing appearance.

Principle of Phthalate Resin Coatings

The hydroxyl group of a polyhydric alcohol reacts with the carboxyl group of an acid to form a phthalate resin through a condensation reaction in which water molecules are separated. Phthalate resins have a limited range of solubility in solvents. Phthalate resins react with oxygen and harden, making them easy to adhere to painted surfaces.

Because the condensation reaction proceeds rapidly, active groups tend to remain, and they are generally used as modified resins. The most commonly used type is a dry oil-modified resin. Natural-drying Phthalate Resin Coating is composed mainly of long-oil phthalate resin, which is oxidized and polymerized by a drying agent to form a coating film.

The unsaturated double bonds of the fatty acids are extremely active and are oxidized by oxygen in the air through the catalytic action of the drying agent, producing peroxides. The principle is that this peroxide eventually decomposes and polymerizes into a network, forming an insoluble paint film.

Similarly, when a dry oil-modified resin with a relatively short oil length is used as the main ingredient, a small amount of melamine or urea resin is added to accelerate curing to produce a fast-drying, high-hardness paint.

Characteristics of Phthalate Resin Coating

The characteristic property of this paint is its high weather resistance, which means that it will not discolor or deteriorate over a long period of time. They also have excellent chemical resistance, minimizing damage caused by chemicals and acidic substances.

In addition, Phthalate Resin Coating has excellent abrasion resistance, making it resistant to physical friction and mechanical stress and allowing it to withstand long-term use. Other benefits of Phthalate Resin Coating include not only durability and protection, but also excellent aesthetic results. Available in a variety of colors and finishes, they offer unique sheen and texture.

What Is a Centrifugal Pump?

A centrifugal pump is a type of centrifugal application pump that uses the centrifugal force of the blades.

There are other types of centrifugal force-applied pumps, such as turbine pumps, borehole pumps, and centrifugal pumps.
All of these pumps are designed to impart energy to a fluid (water or other liquid) by moving the flow of water in a circumferential direction by the central shell of the blades due to pressure changes caused by the centrifugal force of the blades while the impeller is rotating at a high speed in the water.

Principle of Centrifugal Pumps

A centrifugal pump uses a vane shape, also called an impeller, based on a spiral involute curve to convert pressure inside a spiral case into energy, which is then extruded from the discharge port, generally by the fluid itself, such as water, due to the velocity imparted to its impeller. .

A centrifugal pump, also called a volute pump because its body is volute-shaped, has a casing (volute chamber) around the rotating impeller, and the velocity of water leaving the impeller is gradually decelerated and converted into pressure as it passes through the volute chamber.

The advantages of centrifugal pumps are that they are small, suitable for high-speed rotation, can be used for a wide range of discharges and heads, and the discharges are continuous and uniform.

Other features include fewer breakdowns, easier handling, and better performance during operation compared to other pumps.

What Is a Pallet Washer?

A pallet washer is a machine that washes pallets. Used pallets may be dirty, moldy, or contaminated with foreign matter, and pallets need to be washed to avoid exposing loaded cargo to an unsanitary environment.

Pallet washers are machines that, once loaded and installed, strip, wash, centrifugally de-water, dry, and stack pallets. Various types exist depending on the shape and type of pallets to be cleaned.

Uses of Pallet Washers

Once stacked pallets are installed in the washing machine, the pallets are first washed entirely using the low-pressure, high-water-volume method while the rotating brush removes dirt from the entire pallet.

After washing is complete, the pallets are rotated at high speed, and centrifugal force is used to remove water. Finally, high-temperature air blow is applied, the remaining water is drained off, dried, and the process is completed.

There are various types of equipment available, ranging from simple equipment that performs only washing to large-scale equipment that can perform the total process, from washing to drying.

Equipment is selected according to needs, such as equipment installation space and pallet size.

Principle of Pallet Washers

Pallets, an important material handling equipment in the logistics industry, used to be mostly made of wood, but wooden pallets had no concept of washing, often exposing the loaded cargo to unsanitary conditions. This problem is particularly serious at production sites in the garment, food, and electronics industries, where keeping pallets clean has become more important, and pallets have been replaced by plastic and steel pallets that can be cleaned and sterilized.

However, plastic pallets also accumulate dirt if they are used continuously. Pallet washing is a labor-intensive manual process, and some stains cannot be removed by hand. Pallet washing machines automatically perform all processes from washing to dehydration and drying to improve the efficiency of pallet washing.

The size, shape, and type of pallets that can be cleaned, as well as the cleaning efficiency, vary depending on the type of machine. Compact washing machines that take up little installation space can process dozens of pallets per hour, while larger machines can process hundreds of pallets per hour.

What Is High Visibility Safety Clothing?

High visibility safety clothing is a type of work clothing that improves the visual recognition of the wearer’s presence by the surrounding environment and allows the wearer to work safely.

The purpose is to make the wearer’s presence conspicuous to vehicle drivers and machine operators in any light under the front lights of vehicles, heavy machinery, construction equipment, etc., in dangerous places and situations where the wearer is likely to be overlooked by others, such as in bright or dark places, thereby enabling safe work at construction sites and work sites.

Uses of High Visibility Safety Clothing

High visibility safety clothing is used in a variety of workplaces where recognition from the surrounding environment is required.

Principle of High Visibility Safety Clothing

The most important element of high visibility safety clothing is high visibility materials (fluorescent fabrics and retroreflective materials) that can be seen from all directions in 360 degrees.

Fluorescent fabrics used in this safety clothing are mainly limited to fluorescent red, yellow, and orange colors that are highly effective in alerting people to their surroundings, such as red and yellow.

Fluorescent colors are colors that emit wavelengths longer than those absorbed by the color, making them appear more vivid than ordinary colors.

Retro-reflective materials are materials that have the property that light incident from one direction is reflected in the same direction after being irradiated on the surface.

Retro-reflective materials are mainly made of micro glass bead coated or prismatic materials.

Both of these materials utilize the refractive properties of light, and the principle is that incoming light is refracted repeatedly within the processed material and reflected in the same direction from which the light has traveled.

In addition, the design of the safety clothing itself is an extremely important factor in promoting work safety, rather than simply using these materials in a haphazard manner.

What Is an Electro-Pneumatic Regulator?

Electro-Pneumatic Regulator is a device that controls air pressure by means of electrical signals.

They are used in manufacturing facilities where air pressure must be flexibly changed by electrical signals or other means to enable more precise mass production. Most Electro-Pneumatic Regulators control pressure using a pressure regulating valve operated by a coil.

The method of control is feedback control using pressure sensors and input values. Many products are compatible with IoT network platforms, making their adoption suitable for factory automation.

Uses for Electro-Pneumatic Regulators

Pneumatic regulators are used in automotive, home appliance, chemical, food, precision instrument, and pharmaceutical plants. Uses include adjusting output for painting and soldering, precision mixing with air, and removing impurities.

When selecting an Electro-Pneumatic Regulator, consideration should be given to the range of pressures and flow rates supported, the amount of power used, and durability.

1. Adjustment of Paint Spray Jet Volume

The Electro-Pneumatic Regulator is used to control the optimum air volume of the spray paint gun to adjust the paint spray output in the coating process of automobile exteriors.

2. Solder Supply

Electro-Pneumatic Regulators are also used to supply solder in the manufacturing process of substrates. Fluid dispensing can be controlled.

3. Air Supply

Electro-Pneumatic Regulators can control the flow of air. Therefore, they are used, for example, to supply air in the mixing process with air in food factories.

Principle of Electro-Pneumatic Regulators

Electro-Pneumatic Regulator consists of a container with inlet and outlet ports, a pressure regulator valve operated by a coil, a pressure sensor, and a control panel. The pressure sensor is attached to the outlet and connected to the control panel.

The pressure is controlled by the valve, which is operated by the magnetic field connected to the coil and moves according to the amount of current. By opening and closing the valve, the pressure is varied by adjusting the amount of air discharged. During operation, air drawn in from the inlet port passes through the pressure regulating valve and is discharged from the outlet port.

At that time, the pressure is measured by the pressure sensor at the outlet and sent to the control panel. The pressure sensor calculates the difference between the pressure value sent from the pressure sensor and the input value sent from the outside as an electrical signal.

The amount of air to be discharged is calculated for that difference, and the discharge volume is adjusted by opening and closing the valve.

Other Information on Electro-Pneumatic Regulator

1. Dead Zone

Electro-Pneumatic Regulator can control solenoid valves by PWM control, and the flow rate through the solenoid valve increases as duty increases.

However, there is a blind zone, a region where the duty cycle is low and the flow rate does not flow, which is affected by the supply pressure and tends to decrease as the supply pressure increases. This phenomenon occurs because air tends to leak out of the valve seat as the supply pressure increases.

2. Feedback Control

One of the issues with Electro-Pneumatic Regulators is the change in dead zone due to actuator deterioration and supply pressure conditions. This problem causes steady-state deviation (the amount by which the control pressure does not reach the target value).

One means of eliminating steady-state deviation is to use a CPU mounted on an internal control board to vary the compensation component as a pseudo input signal. Since the conventional control loop configuration is maintained, controllability can be easily maintained. 

3. Precautions for Use

Before piping, the inside of the piping must be thoroughly flushed (compressed air blown off). Contamination of chips, rust, etc. may cause malfunction.

Electro-Pneumatic Regulators use precision equipment inside, so the compressed air must be clean and free of solids. Otherwise, durability and operating characteristics will be adversely affected.

What Is an Electric Valve?

An electric valve is a machine used to regulate the flow of air or liquid by holding back or channeling it.

The valve is mainly operated by applying an electric current and opening and closing the valve with the electric signal.

Using an ON and OFF switch, the valve is operated by an electric circuit.

By pressing the switch, the motor inside rotates to open and close the valve.

A similar machine is called a solenoid valve. This type of valve is not much different from electric valves in terms of application, but the principle of operation is different.

Solenoid valves have an internal coil that opens and closes the valve by magnetic force.

Solenoid valves open and close in a linear motion, whereas electric valves are opened and closed by the rotational motion of the motor.

Uses of Electric Valves

Electric valves are used where liquid is flowing. For example, electric valves are used in rocket engines.

In rocket engines, oxygen and hydrogen are mixed to cause an explosion, and the propulsive force is used as the driving force to move the rocket.

Electric valves are used to finely adjust the amounts of oxygen and hydrogen.

They are also used in more familiar applications. They are used in a wide variety of things, such as automatic lubrication systems for baths and automatic water supply systems for home use.

These are manufactured in such a way that the electric valves do not open and close by a switch but automatically open and close by a timer based on time.

Depending on the type of electric valves, they can be used not only for liquid control but also for air conditioning, steam control, and many other applications.

Moreover, because they are airtight and safe, they are used not only in industrial machinery but also in medical and other industries.

Principle of Electric Valves

Electric valves are used in various industries.They are used in rockets, for example, so they may seem like very complicated machines. However, once you understand how it works, you can make a simple valve by yourself.

If it is possible to make one by yourself, it can be very useful for water supply in the home, etc., because it can control the liquid.
If it is possible to make one, it may be very useful in the home, for example, in the water supply system.