First, waterproof material toughness
Waterproof materials are often used in concealed decoration projects, and it is often difficult for consumers to visually see their quality problems. For this reason, waterproof materials are often a hidden danger in decoration. Experts said that the purchase of waterproof materials should be comprehensively investigated from the aspects of tensile strength, elongation at break, and water impermeability.
For waterproofing membranes, due to the tight connection between the application and the base layer, the expansion or cracking or deformation of the base layer directly affects or limits the use of the coil. Therefore, the waterproof membrane has a strong adaptability to the base layer. Experts said that when purchasing PVC waterproofing membranes, consumers can gently pull them by hand, and the higher the toughness of the coil, the higher the tensile strength and the higher the elongation, and the better the adaptability to the base layer. .
In addition, the reporter reminded consumers that if you buy waterproof coatings, you must pay attention to its environmental performance. Waterproof coatings are often added with adhesives and colorants in production. The reporter saw in the market that many building materials cities have water-based building waterproof coatings. Smoked environmental protection performance is better, consumers may wish to try.
Second, the adhesive picks environmental protection
Adhesives are a kind of building materials necessary for home decoration. Many building materials themselves also contain adhesives such as plates, paints and coatings. The quality of the adhesive is directly related to the health of the living environment. However, in the inspection of this industrial and commercial bureau, there are five kinds of adhesives that are unqualified. The quality problems are mainly free 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 Industrial and Commercial Bureau, Beijing Baiyin Xinyuan Trading Co., Ltd. produced 2kg of 100-year-old adhesive, the content of benzene was actually 75g/kg, far exceeding the standard value.
Here, the reporter reminds consumers that when buying adhesives, the method of “sniffing†can be used. If the adhesive emits a strong pungent odor, most of the harmful substances are exceeded.
Third, the artificial board to see the amount of formaldehyde released
The harmful substances in the plate are mainly formaldehyde, and the formaldehyde in the plate exceeds the standard, which may cause the human body to produce abnormal olfactory, abnormal lung function, abnormal liver function and abnormal immune function. Long-term exposure to low-dose formaldehyde also has great harm to human health. In this test, the quality problems of the wood-based panels are all out of the formaldehyde standard.
"GB18580-2001 indoor decoration decoration materials artificial board and its products in the formaldehyde release limit" clearly stipulates that the product "should indicate the formaldehyde emission limit mark of the product". The standard specified limit marks are “E0†and “E1†and can be used directly indoors; the mark “E2†must be treated by the finish before being allowed to be used indoors.
Fourth, strengthen the floor to pick wear resistance
Laminate flooring is increasingly favored by home furnishing people. However, consumers may not know that in addition to whether the amount of formaldehyde released exceeds the standard, the purchase of laminate flooring is more important to see its wear resistance.
In this laminate flooring inspection, a total of 9 samples failed, and the problem was concentrated on the surface wear resistance number. According to the National Quality Standard for Wood Flooring, the surface wear resistance of the wood flooring household qualified products should be above 6,000 rpm. However, many products have very low wear resistance on the surface, and the nominal “Ou Tai†gold walnut floor wear resistance is only 140 rpm, which seriously affects the service life of the floor.
According to the relevant person in the test center, the main reason for this situation is that the manufacturer used inferior impregnated paper in pursuit of low cost in the production process.
Fifth, the toilet to check the depth of the water seal
In 2006, the quality shadow of the toilet has not been dispersed, and the quality test of the Trade and Industry Bureau has made it full of haze. The reporter learned from the test results of the Industry and Commerce Bureau that in this test, the quality problem of the toilet was mainly due to insufficient water seal depth.
Experts said that the depth of the water seal is not enough, which will reduce the odor resistance of the toilet. This is because the exhaust gas in the waterway will escape through the unqualified water seal, which is prone to environmental pollution and is harmful to human health. Experts told reporters that the water seal of the toilet should be more than 50mm.
In addition, the reporter reminded consumers that when buying a toilet, you must look for the "section" wordmark, and the section "water" is the festival "money"!
Sixth, latex paint check ratio
When buying latex paint, consumers know that they should pay attention to their environmental performance, but they may ignore their contrast ratio. As everyone knows, the contrast ratio is directly related to the hiding ability of the latex paint, and the hiding ability is directly linked to the beautification of the wall. It is understood that in this sample, the safety performance is basically qualified, but the contrast ratio is poor.
Experts said that the contrast ratio of latex paint should be no 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 fine cracks and mildew on the wall. Experts explained that in general, latex paint should have a brush wash resistance of 1000 times. However, some of the tests did not reach 20 times.
The reporter learned in the market that few consumers pay attention to the scrub resistance of latex paint. In fact, while paying attention to the environmental performance of latex paint, you should also pay attention to the contrast ratio and scrub resistance index of latex paint.
Seven, water nozzle to check water-saving performance
The faucet is most closely related to the lives of ordinary people. Everyone likes to say, "Water is the source of life." However, unqualified water nozzles often cause "the source of life" to be wasted. In the inspection of the Trade and Industry Bureau, a total of 38 samples were unqualified, and the traffic was too large, causing consumers to spend a lot of money.
The test center told the reporter that according to the local standards of Beijing, the flow rate of the faucet should be no more than 0.15L/s under the dynamic pressure of 0.1 MPa. However, the reporter learned from the website of the Municipal Administration for Industry and Commerce that the nominal “double-issue†faucet reached 0.286L/s, which is close to twice the standard value.
Experts also told reporters that because the flow rate of the faucet is difficult to see with the naked eye, it is necessary to issue a quality inspection report at the time of purchase.
In addition, the reporter saw a new type of water-saving faucet in the market that adopts vertical sealing and automatic closing technology. The faucet has 20 seconds of automatic closing, anti-drip and other functions, and the water saving rate is as high as 20%-50%. At present, all major building materials cities and building materials supermarkets have such faucets for sale.
Eight, wood paint to detect harmful substances
Wood lacquer is one of the “invisible killers†of the indoor environment. Excessive amounts of benzene and lead are often present in paints. Benzene has been identified as a carcinogen by the World Health Organization; lead may affect the body's nervous, hematopoietic, and digestive systems.
The standard value of soluble lead in wood lacquer shall not exceed 90 mg/kg, and the benzene content shall not exceed 0.5%.
Here, experts remind consumers that many miscellaneous paints on the market falsify Chinese environmental protection signs, and consumers are often confused. Therefore, we must look for big brands when purchasing, and we will have certain quality assurance when purchasing in the big building materials market.
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