Due to the booming sales of downstream refrigerators, solar water heaters and other industries, cyclopentane and HCFC-141B, the two types of conventional foaming agents appear to be in short supply. And HFC-245FA, HFC-365MFC these two types of relatively high-end foaming agent markets also began to start in the high demand and energy-saving environment.
There are four main reasons for the situation of short supply.
First, due to the policy requirements, chemical enterprises have stopped production for a period of time and carried out repairs, and the capacity is insufficient. Second, there was not enough supply due to the influence of upstream producers. Third, influenced by the experience of previous years, the market demand of downstream industries such as refrigerators and solar water heaters was not predicted enough, resulting in insufficient production enterprises to start work. Fourth, influenced by national policies and other factors, the downstream industry market demand is strong.
There are only two major domestic suppliers of cyclopentane. In addition, there are three or four foreign companies producing cyclopentane. However, the problem of shortage of supply also still exists.
The market sales of HCFC-141B, another conventional foaming agent, are also relatively prosperous. As a transitional foaming agent, HCFC-141B cannot avoid being replaced eventually.
HCFC-141B has more application industries. Among them, the solar water heater industry is the major application area. In addition, there are also a few small and medium-sized refrigerator enterprises using HCFC-141b as a foaming agent in their products. There is also a part used for cleaning and pipe foaming and other applications.
In addition, as some countries have banned the production of HCFC-141B, demand in the export market is also high. Industry analysts believe that China’s domestic total supply of HCFC-141B is more than 100,000 tons, and the market demand is relatively strong.
Compared with previous years, the enterprises have paid much more attention to HFC-365MFC this year.
Some enterprises have jointly developed the technology for the use of HFC-365MFC in refrigerator products. Since the Chinese government is actively promoting the development of energy-efficient products, Chinese home appliance, and solar energy enterprises are paying close attention to HFC-365MFC and other foaming agent hybrid foaming technologies.
HFC-365MFC can be used as an alternative foaming agent in household appliances and solar water heaters because it does not destroy the ozone layer.
Compared with cyclopentane, HFC-365MFC has better thermal insulation performance, which can improve the thermal insulation performance of the hard foam system. So as to improve the energy saving index of refrigerator and freezer.
It is understood that HFC-365MFC can be mixed with a certain proportion of cyclopentane and HFC-245FA to obtain low-density thermal insulation products, heat preservation, and energy-saving performance is higher than HCFC-141B and cyclopentane.
At present, the popularization problem of HFC-245FA in the Chinese market should be that the price is too high. After adopting the mixed foaming technology, the cost of foaming agent rises by one time.
As early as two or three years ago, there are solar water heater companies in the product using HFC-245FA full foaming technology. But the technology did not catch on. To adopt this technology, it is necessary to add a premixed device, which requires a one-time investment of about 700,000 ~1 million yuan, which is acceptable to the enterprise.
But HFC-245FA is about three times more expensive than HCFC-141B. Procurement is not easy either. Therefore, only a small number of high-end products or export products adopt HFC-245FA. Although this technology has better insulation performance, the cost is high. Hfc-245fa also has a certain greenhouse gas effect, so it is not the final alternative solution.
The recently developed all-water foaming technology can meet these two specificity requirements. It is now being commonly tried in some solar water heater manufacturers. Compared with the traditional foaming technology, the biggest highlight of all-water foaming technology is to use of water as the foaming agent. This can replace HCFC-141B. the ODP value and GWP value are 0. so the pollution of the atmospheric ozone layer is 0. there is also no greenhouse gas effect.
The technical attack overcomes the shortcomings of brittle foam and is easy to shrink. And it has achieved a breakthrough in the low density and low thermal conductivity of all-water foamed polyurethane. However, at present, the insulation layer made by all-water foaming technology is still thicker and can only be used for solar water heater foaming, and cannot be directly applied to refrigerator and freezer products.
And some enterprises believe that the use of phenolic foam should be vigorously promoted in solar water heaters. Solar water heater tank to be exposed to the outdoor environment for a long time to use. The use of polyurethane foam layer will shrink after a long period of high temperature, affecting the insulation performance. And phenolic foam has good heat resistance characteristics. In -196 ℃ to 180 ℃ (allowed instantaneous temperature of 250 ℃) range can be used. Have good thermal stability. And the phenolic foam is the same as polyurethane foam material with a high closed cell rate. The thermal conductivity of phenolic foam is generally 0.02~0.04W/m-K, which is comparable to that of polyurethane.
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