Waterproof coatings are favored in many fields because of their excellent protective properties. According to the author's understanding, there are many kinds of waterproof coatings in the market, such as two-component polymer waterproof coating, one-component polyurethane waterproof coating and so on. However, how to choose high-quality waterproof coatings is believed to be a problem for many consumers. In fact, according to the nature of the points, the market in the sale of waterproof paint can be divided into four types, their performance is different, but also have their own advantages and disadvantages.
Nippon Paint ( Western Chemicals )
Hard mortar: waterproof effect on the back surface of the coating
Hard mortar, also known as rigid mortar: The ratio of emulsion to mortar is 1:4. After the brushing, the coating is not required. It can be directly tiled, which is more convenient. After curing, it forms a cement block and does not cause water seepage. Its back surface has good waterproof effect and is its biggest advantage. The disadvantage is that this kind of mortar has high hardness and is easy to crack with the deformation of the base layer, so it is generally used for waterproofing the back surface. Price: 200-300 yuan / barrel, a bucket of 18 kg, brush 10-13 square meters.
Flexible mortar: Cracking does not affect the waterproof effect
Flexible mortar: The ratio of emulsion to mortar is 5:4, and it is flexible. Even if the base layer deforms and cracks, it will not affect the waterproof effect. It is mostly used on the surface of water, such as wall surface and ground surface, but it cannot be used on the back surface of the top surface. If waterproof is not done well, there is water penetration and it is easy to make water seepage. Price: 300-500 yuan / barrel, a bucket of 18 kg. There is also a type of silicone-based waterproof coating in flexible mortar, which belongs to high-grade flexible mortar. The elastic tension and flexibility are good, but the price is 600 yuan/barrel, which is relatively expensive and very rare on the market.
Acrylate: Long-term soaking does not affect function
Acrylates: pure liquids, ready to use. Water-based, can be melted in water, it is easy to combine with the gap in the ground to form a strong waterproof layer, waterproof effect is better than flexible mortar. After brushing, it is necessary to perform surface treatment such as pulling or sanding to increase the friction and make it easier to tiling. Due to its excellent waterproofing effect, flexible mortars and acrylates are more suitable for long-term immersion in water. Price: 300-500 yuan / barrel, a bucket of 18 kg.
One-component polyurethane: flexible indoor and outdoor use
One-component polyurethane: Both indoor and outdoor use, brushing is very thick, about 3 mm or so, and the elastic tension is more than 300%, very elastic, cracking of any substrate will not make it crack, waterproof effect is best. Although the safety performance control is among the environmental protection requirements, the odor of such a waterproof coating is relatively large and it is difficult for most people to accept, and the environmental performance of very few brands is not up to the standard. Polyurethanes are colloidal and are very thick. The use of scrapers during construction is laborious and complicated. After brushing the paint, it is necessary to perform surface treatment, pull the hair or lift sand to increase the friction, and easy to tiling. Price: 500 yuan / barrel, a bucket of 18 kg.
Waterproof coating knowledge: different in nature and different
In waterproof coatings, the difference between "one-component" and "two-component" is that the mortars are all two-component polymers, that is, the emulsion and the mortar are mixed; the acrylate and the polyurethane are not mixed with the mortar. Single component.
In addition, the drying speed of these paints is affected by the weather, and the drying speed is slower in a cool-climate climate, but the climate has no effect on the waterproof effect. In general, mortars have a drying cycle of 24 hours and acrylics and polyurethanes have a drying cycle of 24-48 hours.
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What about the AC Cooling Fan? Where are they to use?
Let's keep understanding
AC motor is used to achieve the exchange of mechanical energy and AC power of machinery.
Due to the tremendous development of AC power systems, AC motors have become the most commonly used motors.
Compared with the direct current motor, the alternating current motor does not have a commutator (see commutation of the direct current motor), so the structure is simple, the manufacture is convenient, the structure is firm and the motor with high speed, high voltage, high current and large capacity can be easily made. AC motor power range, ranging from a few watts to several hundred thousand kilowatts, or even millions of kilowatts. In the early 1980s, the largest turbine generator reached 1.5 million kilowatts. The AC motor was invented by a Serbian American scientist Nikola Tesla
AC, referred to as AC. also known as "alternating current", referred to as "exchange." Generally refers to the size and direction of the cyclical changes over time voltage or current. Its most basic form is a sinusoidal current.Hippolyte Pixii created the first AC motor based on the principle of Michael Faraday by Michael Faraday in 1832
Ac Cooling Fan side table
side
voltage
bearing
line materials
current
weight(g)
remark
6030
110V/220V
sleeve/ball
QA
normal
145
8025
110V/221V
sleeve/ball
QA
normal
240
8038
110V/222V
sleeve/ball
QA
normal
290
9225
110V/223V
sleeve/ball
QA
normal
280
9238
110V/224V
sleeve/ball
QA
normal
340
11025
110V/225V
sleeve/ball
QA
normal
300
12025
110V/226V
sleeve/ball
QA
normal
320
12038
110V/227V
sleeve/ball
QA/CCA
normal
530
CCA old-ball
13538
110V/228V
sleeve/ball
QA
normal
570
15050
110V/220V/380V
sleeve/ball
QA/CCA
normal
800
17238
110V/220V/381V
sleeve/ball
QA
normal
760
17251
110V/220V/382V
sleeve/ball
QA/CCA
normal
800
17255
110V/220V/383V
sleeve/ball
QA
normal
850
18060
110V/220V/384V
sleeve/ball
QA/CCA
normal
950
20060
110V/220V/385V
sleeve/ball
QA/CCA
normal
1540
22060
110V/220V/386V
sleeve/ball
QA/CCA
normal
1540
22580
110V/220V/387V
sleeve/ball
QA
normal
2140
25489
110V/220V/388V
sleeve/ball
QA
normal
1900
30030
110V/220V/389V
sleeve/ball
QA
normal
2900
DY-2
110V/228V
sleeve/ball
QA
normal
1000
As shown 12038 AC Cooling fan
It can be used for ventilating or enhancing the heat dissipation in metallurgy, chemical industry, light industry, foodstuff, medical equipment, machinery equipment and civil buildings, etc. If the case is removed, it can also be used as a free fan, The pipes are installed in series in order to increase the pressure in the pipes.
Axial fan features:
Small axial fans: low power consumption, fast cooling, low noise, energy saving and environmental protection. Because of its small size and more extensive use.
Ac Fan,Ac Mini Alloy Fan,Ac Induction Motor Fan,High Efficiency Ac Fan
Shenzhen Fu Sheng Electric Co., LTD. , http://www.fushengfan.com