Non-metallic materials are necessary for the body of swimming pool heat pumps, such as the upper cover of swimming pool heat pumps. Some manufacturers use ABS, but INVERPAC swimming pool heat pumps use ASA materials. The market price of ASA is much higher than ABS, the appearance of ABS and ASA are very similar, why does INVERPAC use ASA for swimming pool heat pumps?
Let's compare and study the two materials first:
Advantages: ABS has excellent comprehensive properties, excellent impact strength, good low-temperature performance, and little strength degradation at low temperatures. Wear resistance: ABS has very good wear resistance. Although it cannot be used as a self-lubricating material, it can be used as a medium-load bearing due to its good dimensional stability. Creep resistance: depending on the variety, ultra-high-impact ABS products can withstand a load of 7Mpa without changing the size.
Disadvantages: The heat distortion temperature is low, but the heat-resistant ABS can reach 115°C, and the embrittlement temperature is -7°C. It is combustible. The combustion level of general ABS is only HB, and its weather resistance is poor. When using ABS as surface material, problems such as fading, deformation, and brittleness will occur in a short time. The service life is not guaranteed. Once the fire source is in contact, it will not have a flame retardant effect. So if your swimming pool heat pump uses ABS as the material of the body shell, after a period of time, the pool heat pump shell will become old, faded, deformed, and even cracked in the stressed parts, which will seriously affect the operation of the pool heat pump and even its efficiency, stability and safety.
ASA resin is a graft copolymer of acrylic rubber body with acrylonitrile and styrene. Compared with ABS, the weather resistance has essentially changed due to the introduction of acrylic rubber without a double bond instead of butadiene rubber. It is about 10 times higher than ABS; the fire rating is B1, which is a flame-retardant material, and other mechanical properties, processing properties, electrical insulation, and chemical resistance are also better than ABS material.
Due to the special structure and composition of ASA resin, it does not require surface protection such as spray painting, electroplating, etc. Whether its impact resistance, weather resistance or high-temperature resistance, ASA has much better performance than ABS, and it can be used directly outdoors, and can be exposed to ultraviolet rays for a long time, and it will maintain the stability of its color and mechanical properties under severe conditions such as dampness, humidity, heat, and cold. When exposed to sunlight for 9-15 months, the impact strength and elongation are almost unchanged, and the color is almost unchanged. So it looks like a good choice for our pool heat pump, as the pool heat pump is usually installed outdoor.
In addition, ASA engineering resin has a wide range of applications in the fields of construction and sanitary ware, automobiles and motorcycles, electrical and electronic engineering, outdoor equipment and sports equipment.
INVERPAC pool heat pump hopes to be a long-term, stable and efficient product, so at the beginning of the selection of materials, priority is given to using better materials. If you have a swimming pool, it’s suggested to learn about INVERPAC pool heat pump before making a decision.