The City Administration for Industry and Commerce joined hands with the National Building Materials Testing Center to provide 11 types of interior decoration for 18 building materials markets, shopping malls, and supermarkets in the city, including waterproof coatings, adhesives, wood-based panels, wooden floors, toilets, faucets, latex paints, and wood paints. The decoration products were tested for quality. In the test, a total of 84 samples failed. Among them, part of the waterproof material quality problem "can not be tolerated"; faucet detection single item has 38 samples failed. So, how to buy green building materials in the end?

Waterproof material pick toughness

Waterproof materials are often used in hidden renovation projects, and consumers often have difficulty visually seeing their quality problems. Because of this, waterproof materials are often hidden in the decoration. Experts said that the purchase of waterproof materials should be comprehensively examined from the aspects of tensile strength, elongation at break, and impermeability.

For waterproofing membranes, due to the tight connection between the application and the base layer, the stretching or cracking or deformation of the base layer directly affects or limits the use of the coil. Therefore, the waterproof membrane must have strong adaptability to the base layer. Experts said that when purchasing PVC waterproofing membranes, consumers can pull it by hand and feel that the higher the toughness of the coil, the higher the tensile strength, the greater the elongation, and the better the adaptability to the base layer. .

In addition, the reporter reminded consumers that if you purchase waterproof coatings, you must pay attention to their environmental performance. Waterproof coatings often include adhesives and colorants in their production. The reporter saw in the market that many building materials cities have water-based architectural waterproof coatings. Smokers have better environmental protection performance and consumers may wish to try.

Adhesive pick green degree

Adhesives are a kind of building materials necessary for home decoration, and many building materials themselves also contain adhesives such as plates, paints, and coatings. The quality of adhesives is directly related to the health of the home environment. However, in this inspection by the Bureau of Industry and Commerce, there were a total of 5 types of adhesives that were unqualified, and their quality problems were mainly due to excessive levels of formaldehyde and benzene.

The reporter learned from the National Building Materials Testing Center that the free formaldehyde content of the adhesive should be less than or equal to 1g/kg, and the benzene content should be less than or equal to 5g/kg. In the recent inspection by the Bureau of Industry and Commerce, Beijing's 100-year-old Xinyuan Trading Co., Ltd. produced a one-year, 2kg-per-barrel adhesive with a benzene content of 75g/kg, far exceeding the standard value.

Here, the reporter reminded consumers that they can use the “nose smell” method when buying adhesives. If the adhesive emits a strong irritating odor, then most of the harmful substances are excessive.

Wood-based board to see the amount of formaldehyde released

The harmful substances in the board are mainly formaldehyde, and the formaldehyde in the board exceeds the standard, which may cause the body to have abnormal olfactory sense, abnormal lung function, abnormal liver function, and abnormal immune function. The long-term exposure to low-dose formaldehyde has great harm to human health. In this test, the quality of wood-based panels was entirely out of the standard for formaldehyde.

"GB18580-2001 interior decoration materials artificial wood and its products in the formaldehyde release limit" clearly stipulates that the product "should be marked with the product of formaldehyde emission limit signs." The standard specifies that the limit signs are “E0” and “E1” and can be used directly in the room; the sign “E2” must be treated after finish to be used indoors.

Laminate flooring pick wear rotation

Reinforced laminate flooring is increasingly favored by homeowners. However, consumers may not know that, in addition to seeing whether the amount of formaldehyde released is higher than the standard for the purchase of laminate flooring, it is more important to look at the wear-resistant rotation.

In this test of laminate flooring, a total of 9 samples failed, and the problem was focused on the surface wear-resistant rotation items. According to the National Quality Standard for Wood Flooring, the number of surface wear-resistant rotations of qualified wood flooring products should be above 6,000 rpm. However, many products have a very low wear-resisting surface, and the nominal “Europe” golden walnut floor wear-resisting rotation is only 140 turns, which seriously affects the service life of the floor.

The relevant person of the test center stated that the main reason causing this kind of situation is because the manufacturer used poor quality impregnated paper in order to pursue low cost during the production process.

Toilet bowl check seal depth

In 2006, the shadow of the quality of toilets has not yet been dispersed, and the quality test of the Bureau of Industry and Commerce has filled it with haze. The reporter learned from the inspection results of the Bureau of Industry and Commerce that the quality of toilets in this test was mainly due to insufficient water seal depth.

Experts said that the lack of water seal depth will reduce the deodorant ability of the toilet. This is because the exhaust gas in the water channel will escape through the unqualified water seal, which will easily cause environmental pollution and be harmful to human health. Experts told reporters that the toilet water seal should be more than 50mm.

In addition, the reporter reminded consumers that when buying a toilet, they must look for the “sound” word mark. Festival “water” is the festival “money”!

Latex paint checking ratio

When buying latex paint, consumers all know that they must pay attention to their environmental performance, but they may ignore the contrast ratio. As everyone knows, the contrast ratio is directly related to the covering ability of latex paint, and the hiding power is directly linked to the beautification of the wall. It is understood that in the samples tested this time, the safety performance was basically acceptable, but the contrast ratio was poor.

Experts said that the contrast ratio of latex paint should not be less than 0.90, otherwise its painting function will be greatly reduced. In addition, good quality latex paint can also delay the aging of the wall, such as the subtle cracks in the wall changes, mold and so on. Experts explained that, in general, the paint resistance of latex paint should reach 1000 times. However, some of the tests did not reach 20 times.

The reporter learned from the market that very few consumers are concerned about the scrub resistance of latex paints. In fact, when purchasing latex paints, pay attention to the contrast ratio and the scrub resistance index of latex paints while paying attention to the environmental performance.

Water nozzle check water saving performance

The water spout has the closest connection with the lives of ordinary people. Everyone likes to say, "Water is the source of life." However, unqualified water nozzles often cause a "source of life" to be wasted. In the Industrial and Commercial Bureau's inspection, a total of 38 samples failed, and the flow was too great for consumers to spend a lot of money.

The test center told the reporter that according to Beijing local standards, under a dynamic pressure of 0.1 MPa, the discharge of the spout should not exceed 0.15L/s. However, the reporter learned from the website of the Municipal Bureau of Industry and Commerce that the nominal “double hair” faucet reached 0.286 L/s, which was close to 2 times the standard value.

Experts also told reporters that since the flow of the water spout is difficult to see with the naked eye, it is very necessary to issue a quality inspection report at the time of purchase.

In addition, the reporter saw on the market a new type of water-saving faucet that adopts vertical sealing and automatic closing technology. The faucet has a 20-second automatic shutdown, anti-drip and other functions, water-saving rate of up to 20% -50%. At present, the major building materials city, building materials supermarkets have such taps for sale.

Wood paint inspection pests

Wood lacquer is one of the "invisible killers" of the indoor environment. In the paint often contains excess benzene and lead. Benzene has been identified by the World Health Organization as a carcinogen; lead may affect the body's nerves, hematopoiesis, digestion and other systems.

The soluble lead standard value for wood coatings should not exceed 90 mg/kg, and the benzene content should not exceed 0.5%.

Here, experts remind consumers that many miscellaneous brands of paint on the market are forging Chinese environmental protection signs, and consumers are often confused by them. Therefore, be sure to look for big brands at the time of purchase and purchase them in the big building materials market.

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Prepainted Stainless Steel coil

Why choose prepainted stainless steel?

1. Reduce light pollution: The coating can solve the impact of large-area stainless steel light panels on surrounding buildings.

2. Resolve galvanic corrosion: the surface of stainless steel has dust or foreign metal particles attached to it. Galvanized steel purlin and stainless steel ,in moist air, the condensed water between the two will be connected. As a microbattery (potential difference), it will trigger an electrochemical reaction and accelerate the corrosion and perforation of the contact points. After the stainless steel is coated with an organic coating, it forms insulation and prevents galvanic corrosion.

3. Prevent chemical corrosion: In polluted air (such as the atmosphere containing a large amount of sulfide, carbon oxide, and nitrogen oxide), it will form sulfuric acid, nitric acid, and acetic acid liquid spots in the case of condensed water, which can cause chemical corrosion, especially in coastal areas and In islands, the corrosion performance of chlorinated steel solution on stainless steel is weak, and the annual corrosion rate of austenite in salt water is at least 0.05-0.5mm, and there is a tendency for pitting corrosion and stress corrosion cracking. After the stainless steel is coated, it can isolate the contact of the corrosive medium with the surface of the steel plate.

4. Reflect the individuality of the building: the color or texture of the roof and wall can be customized according to the user's requirements.

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Shandong Wofeng New Material Co., Ltd. , https://www.wofengcoil.com