跳至主要内容

博文

目前显示的是 十二月, 2024的博文

Analysis of the test method for water permeability of protective clothing

  The thermal protection performance of protective clothing is a key test item for many protective clothing. Since people wear such clothing to work in dangerous environments, such as fire scenes or rescue moments and other high-temperature working environments, protective clothing must ensure the safety of the human body, so a reasonable evaluation of the thermal protection performance of protective clothing must be made. Here, Standard Group (Hong Kong) Co., Ltd. uses experimental methods to describe the necessity of such experiments. Subject content and scope of application This standard specifies the performance requirements and test methods for ordinary protective clothing for firefighters. This standard applies to ordinary protective clothing used by firefighters and does not apply to other protective clothing such as thermal insulation clothing and fire-avoiding clothing. Reference standards GB 250 Grey scale for evaluating discoloration GB 3918 Fabric tear strength test met...

chemical properties of benzyl chloride

  Benzyl chloride , also known as benzyl chloride or α-chlorotoluene, possesses distinct chemical properties. Here is a detailed overview of its chemical properties in English: Chemical Properties of Benzyl Chloride Physical State and Appearance : Benzyl chloride is a colorless to slightly yellow transparent liquid. It has a strong, pungent, and irritating odor. Molecular Formula and Structure : Molecular formula: C7H7Cl Molecular weight: 126.59 (or 126.583, depending on the precision) It is a compound formed when one hydrogen atom of benzene is replaced by a chloromethyl group. Solubility : It is insoluble in water. It is miscible with most organic solvents such as ethanol, chloroform, and ether. Physical Constants : Density: 1.10 g/cm³ (at 25°C) Melting point: -39°C Boiling point: 179°C Flashpoint: 67°C (closed cup) Refractive index: 36.01 (molar) Molar volume: 117.1 cm³/mol Surface tension: 33.8 dyne/cm Polarizability: 14.27 (10^-24 cm³) Chemical Reactivity : Benzyl chloride is ...

Uses of Benzyl Chloride

  Benzyl chloride , also known as benzyl chloride or α-chlorotoluene, serves as an important organic intermediate with a wide range of applications and functions. Here is a detailed overview of its uses and roles in English: Uses of Benzyl Chloride As a Raw Material in Manufacturing : Benzyl chloride is widely used in the production of dyes, perfumes, pharmaceuticals, synthetic tannins, and synthetic resins. It is a crucial raw material for synthesizing benzaldehyde, benzyl benzoate, benzylamine, phenylacetonitrile, and other compounds. In the Pesticide Industry : Benzyl chloride can be directly used to synthesize organic phosphorus fungicides such as benzothiazole and isobenzothiazole. It also serves as an important raw material for synthesizing intermediates like phenylacetonitrile, benzoyl chloride, and m-phenoxybenzaldehyde. In the Pharmaceutical Industry : Benzyl chloride is used in the synthesis of various pharmaceuticals, including benzyl penicillin and other benzyl-containi...

Wool Wax: An Introduction and Its Production Process

  Wool wax , a high-melting-point hard wax separated from USP lanolin, possesses a complex composition primarily consisting of esters formed from higher fatty acids (including hydroxy acids) and higher monohydric alcohols, along with free fatty acids, free fatty alcohols, and hydrocarbons. This unique material finds extensive applications across various industries, notably in the cosmetics sector and beyond. Applications in the Cosmetics Industry : In the realm of cosmetics, wool wax serves as an excellent alternative to or partial substitute for USP-grade lanolin in products such as face creams, lotions, lipsticks, and lip balms. Its superior stability and compatibility ensure enhanced performance in these formulations. Moreover, wool wax's emulsifying properties, stability, and ability to inhibit the crystallization of other waxy substances make it an invaluable addition in numerous industrial applications. Production Process of Wool Wax : The typical method for producing wool wa...

Technical advantages of paper clip scratch tester

  As a device specially used to evaluate the wear resistance and scratch resistance of material surfaces, paper clip scratch tester plays an important role in materials science, manufacturing and consumer products. Shanghai Qianshi Precision Electromechanical Technology Co., Ltd. was established in 2012. It focuses on the research, development, design and production of textile testing instruments, and provides textile testing instruments and services for academic research units and testing institutions. Shanghai Qianshi is one of the most competitive and R&D textile testing instrument manufacturers in China. The R&D team is composed of a group of experienced engineers. We are committed to serving customers wholeheartedly and striving to promote technological innovation of textile testing instruments. Working principle: The basic working principle is to conduct quantitative and qualitative tests on the surface of materials by simulating the scratching conditions that may be ...

The application areas of Chinese lacquer wax

  Chinese Lacquer Wax , a versatile substance derived from the seeds of the lacquer tree, plays a pivotal role in numerous fields, showcasing its unique properties and diverse applications. Arts and Crafts Preservation In the realm of arts and crafts, Chinese Lacquer Wax serves as a crucial ingredient in the production of lacquerware, adding an artistic flair and distinct texture to furniture, stationery, and other crafts. Its ability to resist water, oil, and wear makes it an ideal protective layer for preserving the integrity and beauty of these items against environmental degradation. Medical Applications Within the medical domain, Chinese Lacquer Wax finds application in traditional medicine, particularly in the formulation of plaster medications, facilitating enhanced skin penetration and efficacy of the active ingredients. Modern medical research also explores its potential in drug carrier systems and sustained-release formulations, leveraging its stability and efficacy-enhan...

How to make Chinese lacquer wax?

  Chinese lacquer wax , also known as wood wax, is a vegetable fat derived from the fruits of the lacquer tree (Toxicodendron verniciflua Stokes.). It boasts unique properties and a myriad of applications. As a hydrophobic substance insoluble in water, it belongs to the category of authentic plant waxes. With a high melting point, it remains solid at room temperature, exhibiting a delicate texture, excellent penetration, adhesive tenacity, and a smooth feel. In terms of usage, lacquer wax serves as a nourishing agent for furniture, protecting its surface, isolating it from dirt, and keeping the base material clean. It can penetrate the tiny pores on the wood's surface, allowing the wood to breathe naturally and maintaining its natural elasticity, thereby preventing cracking. Furthermore, the protective film formed by lacquer wax has a glossy and warm appearance, enhancing the wood's surface hardness and brightness, while preserving its luminous color. In Yunnan's Nujiang re...

How to operate the Schober abrasion tester

  The Schober abrasion tester uses a rotating wear method to test the appearance changes of fabric samples after friction or wear tests. It is mostly used for automotive interior material testing. During the test, the friction component applies friction to the rotating sample in the tangential direction to measure the wear resistance of the sample. Shanghai Qianshi Precision Electromechanical Technology Co., Ltd. was established in 2012. It focuses on the research and development, design, and production of textile testing instruments, and provides textile testing instruments and services for academic research units and testing institutions. Shanghai Qianshi is currently one of the most competitive and R&D-capable textile testing instrument manufacturers in China. The R&D team is composed of a group of experienced engineers. We are committed to serving customers wholeheartedly and striving to promote technological innovation in textile testing instruments. According to ...

Technical features of stone impact test machine

  In the field of modern engineering, the durability and stability of materials are becoming increasingly important. Especially in the construction, road construction, and mining industries, the detection of wear resistance and impact resistance is undoubtedly an important part of ensuring the safety and quality of the project. As a modern technology enterprise integrating R&D, manufacturing, sales, training, and service, Standard Group (Hong Kong) Co., Ltd. is committed to delivering more testing instruments to the market, providing testing instruments for textiles, leather, combustion, automotive interior and exterior trim, material environmental climate aging, etc., and non-standard customization is also acceptable. Before purchase, targeted tests can be carried out according to customer requirements to ensure that the purchased instruments are suitable. In transportation construction, mining, and construction sites, the impact resistance detection of materials has become an...

Microcrystalline wax application areas

  Microcrystalline wax , as a versatile material, plays a pivotal role across numerous industries. Below are the primary sectors where microcrystalline wax finds significant application: 1. Cosmetics Industry Microcrystalline wax, renowned for its excellent gloss and stability, is extensively utilized in cosmetics. It serves as a foundational component in products such as foundations, lipsticks, and eye shadows, lending them a smooth texture and long-lasting effect. Furthermore, it adjusts the viscosity and consistency of cosmetics, enhancing their spreadability and comfort. 2. Food Packaging Industry Microcrystalline wax boasts exceptional moisture resistance and preservation properties, making it indispensable in the food packaging sector. It can be formulated into food packaging films for products like frozen foods, candies, and chocolates. The heat-sealing and tear-resistant capabilities of microcrystalline wax ensure packaging integrity and safeguard food from moisture and det...

Preparation method of microcrystalline wax

  Microcrystalline wax is a petroleum product obtained through the refining and processing of petroleum. It has high hardness and gloss and is widely used in coatings, inks, candles, and other fields. The following are several main methods for making microcrystalline wax: 1. Conventional production method Raw material preparation: The main raw material of microcrystalline wax is paraffin, which is a by-product of petroleum. The paraffin raw material is extracted from petroleum and then processed into blocks to facilitate the subsequent production process. Heating and melting: Put the paraffin block into a special melting tank, pass a heat source for heating, and gradually melt the paraffin. The heating temperature should be moderate to avoid excessive deterioration of the paraffin. Stirring evenly: Add a certain proportion of additives to the melted paraffin. These additives can be adjusted according to the needs of the product, such as increasing brightness, waterproofing, and ot...

Field of action of benzoyl chloride

  Benzoyl chloride has a wide range of applications across various industries due to its unique chemical properties. Here are some of the key areas where benzoyl chloride is used: Organic Synthesis : Benzoyl chloride serves as an important acylating agent in organic synthesis. It can react with various compounds to form esters, amides, and other derivatives. It is also used as a raw material for synthesizing peroxides, such as benzoyl peroxide, which is widely used as a polymerization initiator, catalyst, self-condensing agent, and crosslinking agent in the production of plastics, polyester, epoxy resins, and acrylic resins. Pharmaceutical Industry : Benzoyl chloride is a key intermediate in the production of pharmaceuticals. It can be used to synthesize benzodiazepines, such as diazepam and estazolam, which are commonly used as tranquilizers and hypnotics. It is also used to produce other drugs and pesticides. Dye and Pigment Industry : Benzoyl chloride is used as an intermediate...

Chemical properties of benzoyl chloride

  Benzoyl chloride , also known as benzoyl chloride or chlorobenzoyl, is an organic compound with the chemical formula C7H5ClO. Here are its key chemical properties: Physical State and Solubility : Benzoyl chloride is a colorless, fuming liquid. It is soluble in ethers, chloroform, benzene, and carbon disulfide. Stability : Benzoyl chloride is stable under normal conditions. However, it should be avoided from contact with strong oxidants, strong bases, alcohols, and water, as it may react dangerously with these substances, producing hazardous decomposition products such as hydrogen chloride and phosgene. Reactivity : It can undergo various chemical reactions due to the presence of the acyl chloride group (-COCl). For example, it can undergo nucleophilic substitution reactions with alcohols, amines, and other nucleophiles to form esters, amides, and other derivatives. Flammability : Benzoyl chloride is a flammable liquid. It has a flash point of 72.2°C and a spontaneous ignition tem...

Areas of action of cardanol

 Cashew phenol, also known as cardanol , is a natural organic compound extracted from cashew nut shell oil. It has a wide range of applications due to its unique chemical structure and various biological activities. Here are the main fields of application for cashew phenol: ​​​​​​​ Medicine and Healthcare : Cashew phenol has antioxidant, anti-inflammatory, and antibacterial properties, which can help prevent and alleviate various diseases. It can be used as an antioxidant and anti-inflammatory drug for the treatment of conditions such as arthritis, cardiovascular diseases, diabetes, and cancer. Cashew phenol can also enhance immune system function and improve the body's ability to fight cancer. Cosmetics : Cashew phenol acts as a natural antioxidant and moisturizer in cosmetics. It can help protect the skin from environmental pollution and UV damage and has anti-aging effects. The use of cashew phenol in skincare products can reduce wrinkles, improve skin texture, and delay aging. ...

Extraction method of cardanol

  1. Water Extraction Method Procedure : First, the cashews are crushed into a powder, and then water is used for extraction. The extraction temperature and time can be adjusted according to actual conditions. Characteristics : Simple and cost-effective. The extracted cashew phenol content is moderate, but its active ingredients are well preserved. Organic solvents are not required, minimizing environmental impact. 2. Acid-Base Extraction Method Procedure : Chemical reactions are utilized to extract cashew phenol. The pH of the cashew powder is adjusted using acids or bases, followed by extraction with organic solvents or water. Characteristics : Higher cashew phenol content extraction. Requires the use of acid or base solutions, with waste products needing disposal. Suitable for medium to large-scale production. 3. Supercritical CO2 Extraction Method Procedure : High-pressure supercritical CO2 is used to extract cashew phenol from cashews. In its supercritical state, CO2 has high ...

Thermal radiation melting drop tester experimental parameters

  The hot irradiation melting drop tester is a test for the NFP92-505 and EU95/28/EC standards specified in Appendix 7 of ECE R118 to determine the melting characteristics of the material. The equipment is integrated with electromechanical control, and the outer box cold plate is treated with orange paint. The box has strong acid resistance inside and outside and a long service life. As a modern technology enterprise integrating R&D, manufacturing, sales, training, and service, Shanghai Qianshi Precision Electromechanical Technology Co., Ltd. is committed to delivering more testing instruments to the market, providing testing instruments for textiles, leather, combustion, automotive interior, and exterior trims, material environmental climate aging, etc., and non-standard customization is also acceptable. Targeted tests can be carried out according to customer requirements before purchase to ensure that the purchased instruments are suitable. ☞If you want to consult m...

Production method of shellac wax

  Shellac wax is a natural wax extracted from shellac, which has many uses, such as making shoe polish, car wax, floor wax, etc. Raw Material Preparation The primary raw material for lac wax is derived from lac, a resinous substance secreted by insects (such as the lac bug) that parasitize certain plants. This substance, after collection, processing, and treatment, becomes the raw material for lac wax production. Extraction Methods Solvent Method : During the production of lac sheets using the solvent method, the lac alcohol solution is subjected to freezing treatment to precipitate and separate the lac wax from the solution. This method leverages the property of lac wax having reduced solubility at low temperatures. Soda Ash Method : In the process of producing bleached lac, the property of lac wax being insoluble in soda ash solution is utilized. By adding soda ash solution and heating with stirring, the lac wax is separated from impurities. Subsequent steps such as filtration, ...

The Marvels of Shellac Wax: A Natural Wonder in Modern Applications

  In the vast realm of natural substances, there exists a remarkable product derived from the secretions of certain insects—Shellac Wax, a substance that has captivated scientists, engineers, and artisans for centuries due to its unique properties and versatility. This yellow, hard wax not only holds a rich history but also plays a pivotal role in contemporary industries, blending tradition with modern technology. The Origin of Shellac Wax Shellac wax, often referred to simply as shellac, originates from the resinous secretions of the female lac insect, Kerria lacca, which resides predominantly on certain tree species in India and Southeast Asia. These insects produce a protective lacquer that, once harvested and processed, forms the basis of shellac wax. This natural process makes shellac wax a sustainable yet precious resource. Chemical Composition and Properties Chemically, shellac wax is composed primarily of fatty alcohols and fatty acids, with carbon chains ranging from C28 t...