Whether we want to develop adhesives or buy adhesives, we usually see that some adhesives will have ROHS certification, NFS certification, as well as the thermal conductivity of adhesives, thermal conductivity, etc., what do these represent? Meet them with siway below!
What is ROHS?
ROHS is a mandatory standard developed by the European Union legislation, its full name is the Directive on the Restriction of Hazardous Substances in electronic and electrical equipment. The standard will be officially implemented on July 1, 2006, mainly used to regulate the material and process standards of electronic and electrical products, so that it is more conducive to human health and environmental protection. The purpose of the standard is to eliminate lead, mercury, cadmium, hexvalent chromium, polybrominated biphenyls and polybrominated biphenyl ethers in motor and electronic products, and focus on the content of lead should not exceed 1%.
What is NSF? What is FDA? What's the difference between them?
1. NSF is the English abbreviation of the National Health Foundation of the United States, which is a non-profit third party organization. It is based on the national standards of the United States, through the development of standards, testing and verification, certificate management and audit documents, education and training, research and other means to ensure and supervise products and technologies related to public health and the environment.
2. Regarding NSF certification, the National Health Foundation (NSF) is not a government agency, but a non-profit private service organization. Its purpose is to improve the quality of life of the public health. The NSF is composed of public health and hygiene experts, including government agencies, universities, industry and consumer groups. Its work focuses on setting development and management standards for all products that have an impact on hygiene, public health, etc. NSF has a comprehensive laboratory that tests all products tested for compliance with inspection standards. All voluntarily participating manufacturers that pass the NSF inspection can attach the NSF label on the product and the literature about the product to show assurance.
3, NSF certified companies, that is, NSF companies, such as home appliances, medicine, food, health, education and so on. The product is related to the equivalent category. The United States Food and Drug Administration (FDA) is one of the executive agencies established by the United States government within the Department of Health and Human Services (DHHS) and the Department of Public Health (PHS). NSF certification body is a non-profit third party international certification organization, has a history of 50 years, mainly engaged in public health and safety and health standards and food product certification work, many of its industry standards are widely respected in the world, and in the United States is regarded as the standard. It is a more authoritative industry standard than the FDA certification of the US Food and Drug Administration.
What is SGS? What is the relationship between SGS and ROHS?
SGS is the abbreviation of Societe Generale de Surveillance S.A., translated as "General Notary Firm". Founded in 1887, it is currently the world's largest and oldest private third-party multinational company engaged in product quality and technical appraisal.Headquartered in Geneva, it has 251 branches around the world. ROHS is the EU directive, SGS can do testing product certification and system certification according to the ROHS Directive. But in fact, not only SGS report is recognized, there are other third-party testing agencies, such as ITS and so on.
What are thermal conductivity?
Thermal conductivity refers to under stable heat transfer conditions, 1m thick material, the temperature difference on both sides of the surface is 1 degree (K,°C), in 1 hour, through the area of 1 square meters of heat transfer, the unit is watt/meter · degree (W/(m·K), where K can be replaced by ℃).
Thermal conductivity is related to the composition structure, density, moisture content, temperature and other factors of the material. Materials with amorphous structure and low density have low thermal conductivity. When the moisture content and temperature of the material are low, the thermal conductivity is small.
What is RTV?
RTV is the abbreviation of "Room Temperature Vulcanized Silicone Rubber" in English, called "room temperature vulcanized silicone rubber" or "room temperature cured silicone rubber", that is, this silicone rubber can be cured at room temperature conditions (synthetic insulators are high temperature vulcanized silicone rubber). RTV antifouling flashover coating has been widely welcomed by power system users for its strong anti-fouling flashover ability, maintenance-free and simple coating process, and has been rapidly developed.
What is UL? What grades does UL have?
UL is short for Underwriter Laboratories Ins. UL Combustion Grade: Flammability The UL94 grade is the most widely used flammability standard for plastic materials. It is used to evaluate the ability of a material to die after being ignited. According to the burning speed, burning time, drip resistance and whether the drop is burning can have a variety of evaluation methods. Many values can be obtained for each material under test depending on color or thickness. When the material of a product is selected, its UL grade should meet the flame retardant grade of plastic parts from HB, V-2,V-1 to V-0: HB: the lowest flame retardant grade in the UL94 standard. For samples 3 to 13 mm thick, the combustion rate is less than 40 mm per minute; For samples less than 3 mm thick, the burning rate is less than 70 mm per minute; Or extinguish in front of the 100 mm sign.
V-2: After two 10-second combustion tests on the sample, the flame can be extinguished in 60 seconds, and some combustibles can fall.
V-1: After two 10-second combustion tests on the sample, the flame can be extinguished in 60 seconds, and no combustibles can fall.
V-0: After two 10-second combustion tests on the sample, the flame can be extinguished in 30 seconds, and no combustibles can fall.
These are the common knowledge points about adhesives shared by siway, Shanghai Siway Building Materials Co., Limited was founded in 1984, At present, it has ISO9001:2015 international quality system certification and ISO14001 environmental system management certification and other certifications.
Post time: Jan-10-2024