In the mid-1990s, China introduced the GB50207-94 national standard titled "Technical Specifications for Roofing Engineering," which clearly outlined quality requirements, construction methods, and acceptance criteria for various types of waterproof coatings. This standard played a significant role in improving the industry. However, there is still no mandatory regulation specifically targeting waterproof coatings, leading to a confusing market that requires more oversight.
When it comes to home renovation, especially in kitchens and bathrooms, waterproofing is an essential step. Unfortunately, none of the ten mandatory national standards address the restrictions on harmful substances in waterproof coatings. As a result, stricter management is needed during the home decoration process.
Some homeowners have reported strong odors in their bathrooms and kitchens. Upon testing, it was discovered that these pollutants mainly came from waterproof coatings, and the contamination proved difficult to eliminate.
Currently, two main types of waterproof materials are available in the market:
One type is polyurethane waterproof coating. These materials are typically made from polyurethane and coal tar. The volatile gases released are highly toxic and hard to remove. Due to these dangers, they were banned in China in 2000. However, some products still on the market use asphalt instead of coal tar. Even so, they are often diluted with organic solvents like toluene or xylene, which can still introduce harmful elements.
The other major category is polymer cement-based waterproof coatings. These consist of a water-based polymer emulsion mixed with high-quality cement and various additives. By combining the flexibility of polymers with the rigidity of cement, these coatings offer excellent impermeability and long-term stability.
They are easy to apply, cost-effective, quick to install, and non-toxic, making them environmentally friendly. As a result, polymer cement-based coatings have become the most popular choice in the waterproofing market.
Experts warn that some renovation companies and homeowners mistakenly believe that the area treated for waterproofing is small and that the presence of cement and ceramic tiles reduces the risk of pollution. In reality, the waterproof layer must be applied to a certain thickness to function properly, which means a larger amount of material is used. If this material contains harmful substances, it can lead to long-term indoor air pollution.
To control pollution from waterproof coatings in home decoration, the focus should be on using safe and eco-friendly materials. Products such as acrylate waterproof coatings and tar-free polyurethane materials have been proven to be non-toxic and odorless, making them ideal choices for indoor environments.
Consumers should purchase materials from reputable suppliers and hire qualified renovation companies. Any area prone to water exposure, such as kitchens and bathrooms, should be properly waterproofed. Waterproofing is not just about aesthetics; it directly affects the health of the household. As a hidden project, its impact only becomes visible after years of use.
If the waterproof coating contains toxic substances, it can become a silent threat inside the home. Therefore, choosing the right waterproofing materials is crucial and should never be overlooked.
Butterfly Valve
Butterfly valves are commonly used in piping systems to control and regulate flow and speed.
The use of butterfly valve is also relatively simple, easy to operate. And butterfly valve is widely used in all walks of life, is an important control fluid system equipment.
, for air conditioning system: A butterfly valve can control the flow of air conditioning pump and piping system to adjust the temperature of the air conditioning system, so that the air conditioning system can work more efficiently.
2, for water treatment: butterfly valve can be used for water treatment process, can effectively control and adjust the flow of water pipe, carefully adjust the appropriate quality of water.
3, used for power system: butterfly valve can also be used for power system, can effectively control and adjust the flow of water and pressure in the power system, to ensure the normal operation of the power system.
4, used for heating system: butterfly valve can also be used for heating system, can control the flow of hot water piping system and adjust the temperature of the heating system, in order to meet the temperature requirements of the house.
In general, the use of butterfly valves is very wide, from air conditioning systems to water treatment, from power systems to heating systems, a variety of industries can benefit from the use of butterfly valves. Moreover, butterfly valve structure is simple, easy to maintain, for enterprises is also an affordable choice.
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