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12-30 

What is the difference between TPE material and TPR material?

With the increasing popularity of thermoplastic elastomers, people will increasingly come into contact with such materials as thermoplastic elastomers. Because this type of material contains a variety of different varieties and properties of elastomer materials. Among these thermoplastic elastomer materials, users are generally exposed to the two concepts of TPE and TPR. Both TPE and TPR belong to SBC styrene thermoplastic elastomer polymer blend modified alloy elastomer materials, so many users are concerned about TPE and TPR. The difference between TPR is rather vague, I don't know how to distinguish it. In order to solve this question, I will introduce the difference between the two in detail: 　　 1. Appearance and feel 　　 TPE matte surface absorbs light, low brightness, and smooth touch. TPR shiny surface is reflective, high brightness, rubber elasticity to the touch, and not as smooth as TPE. 　　2, substrate 　　 In the elastomer industry, the thermoplastic elastomer modified on the basis of SEBS is generally called TPE, and the thermoplastic elastomer modified on the basis of SBS is called TPR. TPR has better elasticity than TPE. TPE has a saturated molecular structure, and its aging resistance, yellowing resistance, temperature resistance and corrosion resistance are better than TPR. 　　3, processing temperature 　　 Usually TPR can be processed thermoplastically at about 150°C, while TPE needs to be processed thermoplastically at about 180°C. Of course, it also depends on their molecular weight. If the molecular weight is high, the processing temperature is also higher. 　　 4. Burning and smell 　　 TPE burns to produce lighter smoke with an aromatic smell. The smoke produced by TPR combustion is thicker and darker (because SEBS is hydrotreated by SBS, it has high hydrogen content, burns without heavy smoke, and has a small taste.) 　　 5. Chemical properties SEBS is a hydrogenated product of SBS, and its chemical stability, aging resistance, UV resistance, hydrolysis resistance and temperature resistance are better than SBS. Therefore, TPE synthesized with SEBS as the base material is more chemical than TPR synthesized with SBS as the base material. Stability, aging resistance and UV resistance are also better. It needs to be pointed out that some places may be called habitual reasons. The styrene elastomer modified materials TPE and TPR are both called TPR, while ignoring the difference between the SEBS and SBS base materials. 　　6, SEBS performance and application 　　SEBS is the use of hydrogenation to saturate aliphatic double bonds in order to expand the scope of product application. Saturated thermoplastic elastomer SEBS has better weather resistance and heat aging resistance than SBS because the soft segment is saturated olefinic structure, and its physical properties are stronger than SBS, so its application range is wider in production. High-end automobiles, medical equipment materials, toys, wires and cables, etc. SEBS material is non-toxic, will not cause allergies, mutations and rejection to human tissues, has good air tightness, temperature resistance, and aging resistance. It can be directly sterilized by high-temperature cooking and ultraviolet rays, so it can be used as a basic material for medical devices, such Surgical sets, surgical gowns, infusion tubes, tourniquets, blood separators, rubber plugs, etc.

12-30 

Investigation and analysis of the current situation of market supply and demand in the resin matrix composite industry from 2020 to 2024

In recent years, the Chinese government has successively issued a series of favorable policies to promote the development of the wind power industry, and has achieved good results. The newly installed capacity has ranked first in the world for ten consecutive years. As a new material with excellent mechanical properties, carbon fiber not only has the inherent characteristics of carbon material, but also has the soft and processability of textile fiber. It is a new generation of reinforcing fiber, and its composite material performance is also at a higher level. As a subdivision of carbon fiber composite materials, resin-based composite materials have the advantages of low density, light weight, high strength, high modulus, fatigue resistance, long life, low thermal expansion coefficient, and good chemical corrosion resistance. The product application range The most extensive, mainly concentrated in many high-tech fields such as wind power blades, aerospace, automobiles, rail transit, electronic appliances and so on. Carbon fiber composite material is a structural material made of carbon fiber and resin, metal, ceramic and other matrix composites. According to the different matrix, it can be subdivided into resin-based carbon fiber composite material, ceramic carbon fiber composite material, metal carbon fiber composite material, concrete and other carbon fiber composite materials. material. In 2019, the global carbon fiber composite material industry market size exceeded 21 billion U.S. dollars, of which the resin-based carbon fiber composite material market size was approximately 17.23 billion U.S. dollars, occupying the largest market share of the carbon fiber composite material industry, close to 80%. According to the "In-depth Investigation and Analysis Report on the Market Supply and Demand of the Resin Matrix Composites Industry and Industry Operation Indicators for 2020-2024" issued by the New Sijie Industry Research Center, in recent years, with the continuous development of downstream industries such as wind power, aerospace, and automobiles , The application demand of resin-based carbon fiber composite materials has been continuously expanded. From the perspective of demand, from 83,000 tons in 2014 to 2019, the global demand for resin-based carbon fiber composite materials reached about 161,000 tons, with an average annual compound growth rate of approximately 14.2%. Among them, wind power blades and aerospace application demand accounted for the largest proportion, with 41,000 tons and 35,000 tons respectively, which together accounted for more than 45.0% of the total output. From the perspective of downstream applications, taking wind power blades as an example, as countries around the world pay more and more attention to issues such as energy security, ecological environment, and climate change, the development of the wind power industry has become a universal consensus on promoting energy transformation and development and coping with global climate change. And act in concert. Of course, our country is no exception. In recent years, the Chinese government has successively issued a series of favorable policies to promote the development of the wind power industry, and has achieved good results. The newly installed capacity has ranked first in the world for ten consecutive years. Wind turbine blades are necessary equipment for wind turbine operation. With the rapid development of my country's wind power industry, its market development potential is huge. As the main raw material of wind turbine blades, resin-based carbon fiber composite materials are expected to achieve rapid development under this background. Industry analysts from Xinsijie said that in recent years, resin-based composite materials have been widely used in the market due to their advantages of low density, light weight, high strength, high modulus, fatigue resistance, and good chemical corrosion resistance. Mainly concentrated in wind power blade manufacturing, aerospace, automobile manufacturing and other fields. With the continuous and stable development of these downstream industries, the application demand for resin-based carbon fiber composite materials continues to expand, and the future development space is broad.

12-30 

Lightweight super sound insulation material won the "Popular Science" automobile category best innovation award

A few days ago, Nissan China’s official website announced that its newly developed lightweight super sound insulation material won the “Popular Science” (“New Era of Science and Technology”) automotive category Best Innovation Award, which is a new lightweight super sound insulation material. 　　 In January this year, Nissan Motor displayed a new lightweight super sound insulation material at the 2020 International Consumer Electronics Show. Officially, this new material can not only improve the quietness of the car, but also help improve fuel economy. 　　According to the introduction, the material is composed of a combination of crystal structure and plastic film, which can effectively control air vibration and reduce the transmission of broadband noise (500-1200Hz) generated by vehicles on roads and engine operation. At present, most of the sound insulation materials in this frequency band are made of heavy rubber. 　　Nissan stated that the optimization of the weight of the new super sound-insulating material enables the weight to be reduced by 75% compared with traditional sound-insulating materials without changing the sound insulation effect. 　　 It is worth mentioning that the production cost of the new super sound insulation material is almost the same as that of the traditional sound insulation material, and it is even more competitive. Therefore, the material is also suitable for vehicles subject to cost or net weight restrictions. 　　 In addition, Nissan's new super sound insulation material can also make the body lighter, which in turn will help improve energy efficiency and economy and reduce the vehicle's environmental impact. The quiet cabin can make driving more comfortable and improve driving experience. Author: Chen Chi Source: Express Technology

12-30 

Drexel University found a new application of MXene material, which can shield 99% of radiation

This month, the four-year-old Havana syndrome finally has a reasonable explanation. A new report issued by the National Academy of Sciences stated that a series of mysterious neurological diseases previously reported may be caused by directed microwave energy. 　　 Microwave radiation usually refers to electromagnetic waves with a frequency of 300 to 300,000 MHz and a wavelength of less than 1 m. It is a physical source of pollution and is not easy to detect. 　　 More than a certain amount of microwave radiation can cause harm to the human body. The specific impact is mainly on the central nervous system, which may cause headaches, dizziness, sleep problems, memory loss and so on. In addition, it will also affect the cardiovascular system and reproductive system. 　　 Microwave radiation is very widespread in life, and there is a small amount of microwave radiation in mobile phones, microwave ovens, and routers. However, since the value is extremely small, there is no need to worry about having too much impact on the body. 　　 Recently, in response to microwave radiation, scientists have developed a special fabric called "Faraday fabric", which can block almost all electromagnetic waves. 　　 This research result comes from Drexel University (Drexel University) and has been published in "Carbon" magazine. 　　 The key component of this fabric is a material called MXene, which helps protect wearable devices from interference and protect people from potentially dangerous radiation. 　　 MXenes is a conductive two-dimensional material, which has attracted more and more attention due to its application in sprayable antennas, conductive clay and fast charging battery electrodes. 　　 A few months ago, the Drexel University team described a special MXene material-titanium carbonitride (titanium carbonitride) excellent electromagnetic shielding performance. 　　 Titanium carbonitride is not only very thin (only a few atoms thick), but it absorbs signals instead of reflecting them, so it blocks electromagnetic waves in the process. 　　 In the new study, researchers have discovered a new application of MXene shielding, namely the production of fabrics that shield electromagnetic waves. They immersed a cotton and linen sample in the MXene solution and found that it could eventually block more than 99.9% of the signal. 　　 After careful observation, it seems that MXene material can stick to the fabric fibers very well due to the charge of the material. The team said that this can be made into a durable coating that does not require other pre-treatment or post-treatment processes like other conductive materials. 　　 In the long-term effectiveness test, these fabrics proved to show good performance. After two years of storage under normal conditions, the shielding effect of the sample has only a relatively small drop, between 8% and 13%. 　　Usually, electromagnetic radiation protection clothing uses a loop formed by metal fibers in the clothing to generate an induced current, and the induced current generates a reverse electromagnetic field for shielding. The metal fiber material can reflect electromagnetic waves, that is, when the aperture of the metal mesh is smaller than 1/4 of the wavelength of the electromagnetic wave, the electromagnetic wave cannot pass through the metal mesh. This achievement provides a better choice for current electromagnetic interference shielding materials. MXene coated fabrics not only surpass the performance of commercial metal coated fabrics, but they can be sustainably produced through aqueous solutions in the form of coatings without additional processing. Or chemical additives. The team said that these shielding fabrics can be used to protect wearable electronic products from interference without adding too much volume to them, and can also be used for those who need to venture into places with dangerous high electromagnetic fields or those who may be exposed. Personnel under strong microwave radiation make protective clothing.

12-30 

2020-2024 China antibacterial material market feasibility study report

Organic antibacterial materials have become the mainstream antibacterial materials on the market due to their wide range of sources, long use and development time, mature technology, convenient processing, strong sterilization power, fast sterilization rate, wide antibacterial range, and low price. 　　 Antibacterial material refers to a new type of functional material that has the function of killing or inhibiting microorganisms. It can be used in many fields such as medical treatment, household products, household appliances, food packaging, plastic film, sanitary ceramics, and architectural coatings. 　　 Antibacterial materials can be divided into three categories: natural antibacterial materials, organic antibacterial materials and inorganic antibacterial materials. Natural antibacterial materials include plant-derived antibacterial materials (such as terpenoids and their derivatives, alkaloids, steroids, saponins, lignans, amino acids, etc.), animal-derived antibacterial materials (such as sugars, amino acids, and peptides) Etc.) and microorganism-derived antibacterial materials (such as antibiotics); organic antibacterial materials include quaternary phosphorus salts, quaternary ammonium salts, phenolic alcohol esters, biguanides, imidazoles, etc.; inorganic antibacterial materials may contain metal ions (metal or metal Oxide) type and photocatalytic metal oxide type antibacterial materials. Different types of antibacterial materials have different application fields due to their different properties, costs, and degrees of industrialization. For example, natural antibacterial materials are used in food packaging, microorganism-derived antibacterial materials are used in pharmaceutical manufacturing, and organic antibacterial materials can be used in food packaging and In many fields such as pharmaceutical packaging, water treatment, and coatings, inorganic antibacterial materials have application potential in biomedicine, sewage treatment, and food packaging. Among them, organic antibacterial materials have become the mainstream antibacterial materials on the market due to their wide range of sources, long use and development time, mature technology, convenient processing, strong sterilization power, fast sterilization rate, wide antibacterial range, and low price. 　　 In recent years, the global and Chinese antibacterial material markets have shown rapid growth. According to the "2020-2024 China Antibacterial Material Market Feasibility Study Report" released by Synopsys, the global antibacterial material market is mainly distributed in the United States, Europe and Asia, China, Japan and South Korea. The average annual growth rate in the past five years has been 10% or more. The factors that promote the rapid development of the antimicrobial material market are as follows: First, with the continuous development of the economy, people's income levels have been greatly improved, and social awareness has also changed, and they pay more attention to their own health; second, globalization The advancement of human resources and the convenience of social transportation have made the cancellation of humans more and more frequent, which also created opportunities for the spread of diseases, resulting in an increase in infectious diseases, epidemics, etc., with greater and greater impact. Therefore, governments and people of various countries have , Hygiene and safe living environment is paying more and more attention to promote the development of antibacterial materials; again, scholars, companies and other research on antibacterial materials have never stopped, which has led to the progress of antibacterial material technology, and the thermal stability, durability, Security has been improved to better meet the needs of downstream users. 　　Industry analysts from Xinsijie said that the continuous advancement of various researches not only improves the performance of antibacterial materials, but also makes the application range of antibacterial materials wider and wider, and the future market prospects for antibacterial materials are broad.

12-30 

Futures stand at 3700, and the steel index (Myspic) continues to rise this week

This week, the Myspic composite index reported 143.91 points, up 0.53% from the previous week. Among them, the Long Products Index reported 159.84 points, an increase of 0.68% from the previous week. The market price of construction steel rose slightly this week. The average price of threaded HRB400 (20mm) in 25 major markets across the country was 3860 yuan/ton, an increase of 38 yuan/ton from last week. 　　 The flat steel index this week was 128.67 points, up 0.36% from last week. Among them, the hot coil price index rose 0.37% from last week, and the plate price index fell 0.10% from last week. The national hot-rolled coil market rose slightly this week. The average price of 4.75mm hot-rolled coils in 24 major markets across the country was 3,935 yuan/ton, an increase of 5 yuan/ton from last week. The market price of 20mm plate dropped slightly. The average price of 20mm plate in 24 major markets across the country was 3,965 yuan/ton, down 5 yuan/ton from last week.