Technical article

Definition of UP resin

Unsaturated polyester resin (called Unsaturated Polyester Resin: UP resin) is a type of thermosetting resin that contains unsaturated polybasic acids such as Maleic Anhydride (MA), or Fumaric Acid (FA) etc. To this, it combines Phthalic Anhydride (PA), Isophthalic Acid (IPA), Telephthalic Acid (TPA), and Het Acid. It is a liquid resin dissolved in a polymerizable monomer in which polyhydric alcohols such as, Propylene Glycol (PG), Ethylene Glycol (EG), Diethylene Glycol (DEG), Dipropylene Glycol (DPG), Neopentyl Glycol (NPG), Bisphenol-A and unsaturated alkyd obtained by esterification at high temperature.

UP resin manufacturing process

Definition of air pump

What is BLOWER?

It is a device that extracts air (bubble) by compressing it with low or high pressure using the power of electric energy, and is mainly used in aquariums (live fish, ornamental fish, interior), septic tanks, medical devices, and other device industries. Currently, the largest market in Korea is for septic tanks and as the market for medical devices gradually increases, the use of electric bubble generators is also expected to increase.

Septic tanks are largely divided into aerobic septic tanks Air pump internal structure and operation principle that breaks down contaminants by aerobic microorganisms and anaerobic septic tanks that decomposes contaminants by anaerobic microorganisms, according to the types of microorganisms that decompose contaminants. Most electric bubble generators are used in aerobic septic tanks.

Most electric bubble generators are used in aerobic septic tanks.

* Aerobe: microorganisms that grow using dissolved oxygen in water
* Anaerobe: microorganisms that can grow without air

Drawings internal structure and Function principle

Drawings internal structure and Function principle

The diaphragm is bound to both ends of the mover (fixed magnetic force), an electromagnet is fixed at the center to generate a variable magnetic force.
Due to the generated variable magnetic force, the mover is operated, and in conjunction with it, the diaphragm of both sides creates a volume change in its internal space to suck and discharge external air.

Type of air pump

The types of brows are divided into the following methods: pumping, diaphragm, piston, root, and ring.

The basic operation is AC 220V, using the characteristics of AC power, and commonly using an electromagnetic method using a transformer and a magnet.
(permanent magnet or ordinary magnet)


Pumping method blower

It uses rubber-made parts called pum-ping rubber, and because it has little air volume or pressure, it can be used mainly for aquariums (live fish, ornamental fish, interior) and medical devices (nebulizers, agricultural suction machines).


Diaphragm method blower

Because the discharged air volume and air pressure are considerably higher than the pumping method, this type of blower is used as device parts for large aquariums, contact aeration type septic tanks, machinery, etc.


Piston type blower

This is a method of generating comp-ressed air using an electronic type, a piston, and a spring. The noise is low, but the price is a bit expensive.


Root method blower

Rotors with two cocoon-shaped cross sections on two balanced shafts are installed, maintaining a small gap between the inner and inner rotors of a long circular cable. These rotors are volume change-type blowers that send a certain amount of air enclosed in the casing and rotor from the suction side to the discharge side by rotating at equal speed in opposite directions. There are two- and three-winged rotor types, and three-wing type with less noise and vibration is used.


Ring type blower

As the impeller rotates, the air absorbed is pushed out to the discharge port by the centrifugal force of the vane. It is mainly used where a large amount is required, such as the root method.


Rotary type blower

The rotor in the eccentric state has its wings installed in the axial direction, and the wings are pushed out by the centrifugal force coming from the rotation of the rotor, and the pushed out wings are pushed back by the wind that is directed to one side. Always pay attention to the lubricant.