Foshan inner wall coatings and adhesive quality inspection 5 batches of adhesive is not qualified

First, the basic situation
This comparative test, Foshan City Consumer Council staff as consumers in Foshan City, each
paint
building materials market, distribution center randomly purchased 25
built-in wall paint
samples and 20 adhesive samples, commissioned Foshan City Quality Measurement Supervision and Testing Center testing. The inner wall coating is tested according to the requirements of GB18582-2008 "Limits of harmful substances in interior decoration material interior wall coatings" for volatile organic compounds (VOCs), free formaldehyde, soluble heavy metals lead, cadmium, chromium, mercury, benzene, toluene, ethylbenzene, xylene and 4 harmful substances limits. Adhesives in accordance with GB18582-2008 "interior decoration materials in the adhesive limit of harmful substances" standard requirements, free formaldehyde, stupid, toluene and xylene, total volatile organic matter, dichloromethane, 1,2-dichloroethylene, 1,1,2-tachloroethylene, the total amount of harmful substances and other environmental protection indicators.
The test results (only responsible for samples): 25 internal wall coating samples all meet the standard requirements, 8 woodworking rubber adhesive (solvent-based) samples of 4 samples are not up to standard, 2 SBS adhesive samples are in line with the standard requirements, 10 polyethylene ethylene polyester emulsion wood adhesive (water-based type) samples have 1 sample is not up to standard.
, the analysis of test indicators and comparison
(i) inner wall coating
This comparative test 25 internal wall paint samples of the inspection items all meet the standard requirements. The pollution of the inner wall coating mainly comes from the harmful substances contained in its composition, and through the inspection we can see that the sum of benzene, toluene, ethyl benzene, xylene and soluble heavy metals lead, cadmium, chromium and mercury are basically below the detection limit of the method. The main pollution is actually volatile organic compounds and free formaldehyde from interior paint products. GB18582 is only an entry threshold for products, from the sample test data, the value of samples that meet the standard requirements are very different, because the standard requirements of the value from below the detection limit to close to the standard requirements there are great differences. The specific comparison is as follows:
1, volatile organic compounds (VOC)
VOC concentration on the human body can be divided into three types: first, odor and sensory, including sensory stimulation, feeling dry; Morbid, irritating the eye mucous membranes, nasal mucous membranes, respiratory tract and skin, VOC is easily passed through blood-brain disorders, which can lead to inhibition of the central nervous system, causing headaches, fatigue, drowsiness and discomfort; This test, 25 samples of VOC indicators are in line with the standard requirements, but the data vary greatly, such as: Foshan South China Sea District Danfu Hongdi color decorative materials factory and other 4 enterprises VOC detection indicators are less than 2 (g/L), and Bauhinia Paint (Shanghai) Co., Ltd. and other 4 enterprises to detect VOC data to meet the standard requirements of the highest value of 120 (g/L). See Table 1 for details.
Table 1: Volatile Organic Compounds (VOC) Data Comparison Table
2, Free Formaldehyde
Free Formaldehyde has a strong stimulating effect on human mucous membranes and skin, acute formaldehyde poisoning can lead to tears , runny nose, cough and other symptoms, and cause respiratory diseases, chronic inhalation of low concentrations of formaldehyde can lead to persistent headache, weakness, insomnia, skin long-term exposure to formaldehyde will lead to dermatitis, allergies will also occur measles, the International Cancer Institute listed formaldehyde as a suspected carcinogen. In this trial, free formaldehyde testing was carried out on 25 samples, the lowest of which was 16 (mg/kg) and the highest was 78 (mg/kg). See Table 2 for details.
table 2: Free formaldehyde data comparison table
3, soluble heavy metals lead, cadmium, chromium, mercury and benzene, toluene, ethyl benzene, xylene sum
soluble heavy metals: can cause serious physiological damage and cause a variety of diseases. Excessive lead can interfere with the synthesis of iron hemolyte affecting the central nervous system, digestive system and reproductive system in children more harmful can affect the growth and development of children and intellectual development. Long-term inhalation of cadmium dust can damage kidney or lung function. Long-term skin exposure to chromium compounds can cause contact dermatitis or eczema. Chronic mercury poisoning mainly affects the central nervous system and so on. Benzene, toluene, ethylbenzene, xylene sum: too much personal absorption will be poisoned, inhibit the central nervous system, make people lose consciousness, and produce anesthesia phenomenon, initially cause excitement, drowsiness, headache, dizziness, fatigue, loss of appetite, loss of consciousness and so on. In this experiment, 25 samples of these two indicators are stable performance, the data are more uniform, but the price difference is large. Table 3
: Table 3 of the comparison table for the sum of soluble heavy metals lead and benzene, toluene, ethylbenzene and xylene in interior wall coatings table
Table 3: Table 3 for the sum of lead and benzene, toluene, ethylbenzene and xylene in interior wall coatings
(ii) Adhesives
This comparative test purchased 20 home decoration carpentry commonly used adhesive samples, of which neoprene adhesive (solvent-based) samples for 8 samples, SBS adhesive samples for 2, polyethylene acetate emulsion adhesive (water-based type) samples 10. In accordance with the national standard GB18582-2008 "interior decoration materials adhesive limit" environmental protection requirements for testing, the result is: 4 neoprene adhesive samples do not meet the requirements, 1 polyethylene ester emulsion wood adhesive samples do not meet the requirements, other samples are in line with the standard requirements. The specific data comparison is as follows:
1, neoprene adhesive
neoprene adhesive 8 samples of 4 samples do not meet the standard requirements, respectively: Guangzhou Dayyou Decorative Materials Industry Co., Ltd. production of Daya brand samples of dichloromethane, 1 2-DCH, 1,1,2-Tachloroethylene, TCB and total volatile organic matter 2 indicators do not meet; 2 indicators of dichloromethane, 1,2-dichloroethylene, 1,1,2-troploroethylene total and total volatile organic matter do not meet; The total index of dichloromethane, 1,2-dichloroethylene, 1,1,2-troploroethylene and troponyl chloride for brand samples did not meet, and the total volatile organic compound index for the production of Nantes samples by Dixon Coatings Co., Ltd. did not meet. This test only compared 5 indices of 4 samples that met the standard requirements, and the samples that did not meet the requirements were not compared.
(1) Free formaldehyde comparison:
Free formaldehyde vs.
(2) Benzene Comparison:
benzene comparison
(3) Toluene-toluene comparison:
Toluene-toluene comparison
The best performance of the toluene-toluene index of neoprene adhesive samples was that Hengao Adhesive Co., Ltd. produced Baide brand, only 0.4 (g/kg), Jiangmen Eyuan Bio-Chemical Engineering Co., Ltd. produced samples of 189 (g/kg), close to the highest limit of the standard. See table below:
(4) Total dichloromethane, 1,2-dichloroethylene, 1,1,2-troploroethylene, TCVin Total:
Dichloromethane, 1,2-Dichloroethylene, 1,1,2-Tchloroethylene Total Comparison of
(5) total volatile organic matter comparison:
total volatile organic matter comparison
2, SBS adhesive
SBS adhesive a total of 2 samples are in line with the standard requirements, from the test data, Guangzhou Jiang Chemical Co., Ltd. production of a river brand are better than Jiangmen billion source bio-chemical engineering Co., Ltd. production of samples. See the table below:
SBS adhesive
3, polyethylene acetate adhesive
polyethylene acetate adhesive purchased a total of 10 samples, including Guangzhou Panyu Zinan chemical plant production of Weiwen brand samples of free formaldehyde indicators do not meet the standard requirements, others are in line with the standard requirements. The following is a comparison of 4 indicators from 9 samples that meet the requirements.
(1) Free formaldehyde comparison
free formaldehyde indicator detection, 9 samples meet the standard requirements, but the difference in test data is quite large, the best performance is Guangdong Longma Chemical Co., Ltd. production of Longma brand, index is only 0.01 (g/kg), and Guangzhou Panyu Zinan chemical plant produced a sample of 0.99 (g/kg), very close to the highest limit of the standard. See table below:
free formaldehyde vs.
(2) total volatile organic matter comparison
total volatile organic matter index detection, 9 sample data that meet the standard performance is relatively close. See table below:
Total Volatile Organics vs.
(3) Benzene and toluene and xylene
benzene and toluene xylene two indicators testing, 9 eligible sample data performance is stable and basically consistent, consumers can choose according to demand. See table below: Comparison of
benzene and toluene with xylene
4, analysis and detection indicators of adhesive substandard items interpretation
(1) 4 of the 8 carpentry neoprene adhesive samples purchased are not To meet the standards, respectively, the label is: Diyi Coatings Co. , Ltd. production of Nantes brand, Foshan Shunde District, North Yizhen Qijiang Coatings Co. , Ltd. production of Qijiang brand, Dongguan City Shanli polymer materials research Co. , Ltd. production of Sanshanli brand, Guangzhou Dayi decorative materials Industry Co. , Ltd. production of Dayi brand. Among them, the total amount of dichloromethane, 1,2-dichloroethylene, 1,1,2-troploroethylene exceeded the standard of 3 samples, the total volatile organic matter exceeded the standard of 3 samples. Labeled as Guangzhou Dayo Decorative Materials Industry Co., Ltd. production of Daya brand chlorpyrine-type high-performance structural all-round glue 1,2-dichloroethylene content of more than 190g/kg, resulting in dichloromethane, 1,2-dichloroethylene, 1,1,2-troploroethylene, tranyl chloroethylene total close to the standard requirements of 40 times, the total volatile organic matter of 740g/L, but also significantly higher than the national standard ≤700g/L. National standards stipulate that halogenated hydrocarbons such as dichloromethane, 1,2-dichloroethylene, 1,1,2-troploroethylene and other halogenated hydrocarbons cannot be used as solvents, and that the total amount of dichloromethane, 1,2-dichloroethylene, 1,1,2-troploroethylene, and troploroethylene brought in by other raw materials cannot exceed 5g/kg. Guangzhou Dayo Decorative Materials Industry Co. , Ltd. production of neodybic high-performance structural adhesive is obviously the production of the use of DCH as one of the main solvents. In the poor ventilation workshop using high-content halogenated hydrocarbon adhesives, high concentrations of 1,2- dachloroethane steam is inhaled in large quantities, will lead to acute poisoning, the general human air concentration of 0.3 to 0.6g/m3 2-3h can occur poisoning, concentration of 16.8g/m3 is life-threatening. Long-term inhalation of low concentrations of dichloromethane or dichloroethane can have dizziness, headache, fatigue, sleep disorders and other neurodebilitation syndrome, but also appetite loss, nausea, vomiting and other digestive tract symptoms, and can have gastrointestinal or respiratory bleeding and toxic liver disease performance of patients can also see muscle and eye tremors.
(2) free formaldehyde too high products during use formaldehyde will gradually spread to the air, resulting in environmental pollution. People in life after exposure will cause a variety of diseases, such as bronchitis, such as long-term exposure, resulting in malignant tumors. This comparative test found that the standard called Guangzhou Panyu Zinan chemical plant production of Weiwen brand white latex free formaldehyde exceeded the standard.
(3) Volatile organic compounds (VOCs) in adhesives include organic solvents in solvent-based adhesives, free formaldehyde in trialdehyde, and organic additives, curing agents and plasticizers used in adhesives. Volatile organic compounds (VOCs) are high on the one hand because enterprises use more dense solvents such as halogenated hydrocarbons, on the other hand, production enterprises do not design formulations according to product standards, stealing materials between products with low solid content.
(4) benzene is a carcinogen that has been widely recognized internationally, the adhesive samples in this trial did not find that the production enterprises use pure benzene as a solvent, benzene content brought in by other raw materials is not exceeded.
3. Consumption recommendations
The general selection principle of interior wall coating for home decoration is good decoration and environmental protection, appropriate protective effect and reasonable durability and economy, and the choice of adhesive focuses on environmental protection and durability.
(a) environmental protection is very important for home decoration materials. Odor is an intuitive method of judgment, home decoration materials should try to choose low odor or odorless. In addition, interior wall coating products can pass the JC/T1074-2008 "indoor air purification function coating material purification performance" or HJ2537-2014 "environmental mark product technical requirements
water-based paint
" standard testing requirements, adhesive can pass HJ/T220-2005 "environmental mark product technical requirements adhesive" standard testing requirements to indicate that the product's environmental protection is more secure.
(ii) the decorative nature of the interior wall paint is the most fundamental goal of use. Decorative including color, texture, gloss and other content, with people for home decoration requirements to further improve, green environmental protection, low-carbon life has become the mainstream of the times. At the same time, the development direction of the building interior wall coating is tending to high-end, not only requires good scrub resistance, fluidity, brushing, etc. , but also on the visual effects of the paint itself to put forward higher requirements, including luster to complete bright light, semi-gloss, bright, color to be elegant and soft, texture to be delicate and so on.
(iii) the protective effect and durability of the inner wall coating are reflected by the washability. Wash-resistant brushing is one of the basis for dividing product quality grades of GB/T9756-2009, and the price difference between different products of the same brand is also due to the wide difference in product grade and performance. Users can purchase based on their own needs and budget. To learn more about its performance, you can ask the dealer to produce a quality certificate.
(4) Home decoration materials should be as much as possible to understand the relevant information, the choice of quality, environmental protection has been recognized by the state and consumer trust brands, in general, these brands of enterprises larger scale, relatively strict management, there is a better quality assurance system.
(v) home decoration materials to choose packaging to identify a full range of products. In the packaging barrel should have trademarks, manufacturer name address and telephone, production date, net content (or capacity), implementation standards (including quality grade), shelf life, certificate of conformity and other more important marks.