Aramid fibers born in the late 1960s , initially as space development and an important strategic material which is not secret show, added a lot of mystery. After the Cold War , as a high-tech Kevlar fiber material used in a large number of civilian areas , gradually revealing the true color of Lushan .
Kevlar stands for " Xinke aramid fabrics , is a new type of special-purpose synthetic materials. Because of long-chain polymer molecules constituting the fibers containing amide groups , and therefore , like nylon , polyamide fibers belong . But the difference is that the nylon polymer macromolecules constituting the amide group is connected to an aliphatic chain , an aromatic polyamide fiber and an amide group is connected to an aromatic ring or an aromatic ring derivatives, such fibers so that collectively the aromatic polyamide fibers , aramid referred .
Since the aromatic group-substituted aliphatic group of flexible and reduced rigidity of the molecular chain are reflected in terms of fiber properties , heat resistance , and initial modulus were increased significantly , so the aromatic polyamide fiber is an organic fiber temperature the main categories. One of the most practical value species are the two molecular chains arranged in jagged aramid fiber , aramid fiber 1313 is our life ; First, the molecular chains are arranged linearly para-aramid fiber , our life is Kevlar 1414. Both similar chemical structure , but the performance difference is great , different application fields : aramid 1313 for its excellent heat insulation, a high-quality functional fiber , Kevlar and metallic make an excellent 1414 in high-performance fiber core occupies an important position .
2014年1月23日星期四
2014年1月17日星期五
New features of composite flame retardant fabrics
The use of PTFE plastic resin into the hole feature biaxial stretching method using microporous film made . The membrane surface per square centimeter can reach more than one billion micropores , each pore diameter ( 0.1 -0.5 Jing Jing ) than the diameter of the water molecule (20 -100 Jing Jing ) hundreds of times smaller than water vapor molecules ( 0.0003 Jing -0.0004 Jing ) take on a thousand times , so that water vapor through , but not by water droplets , microporous structure can be achieved using this excellent waterproof and breathable functions ; addition, because of the extremely tiny holes arranged in longitudinal and flexural no specifications , so wind impermeable , which in turn has a windproof and warm characteristics. Xinke flame retardant fabric finishing by special production technology can effectively prevent the spread of flames , while protecting the original performance fabric to meet international GB8965-98 " fire retardant protective clothing " requirement , and can reach the EU "EN470, EN470-1, EN533, EN531, BS5852 " and other standards, adopted by the EC , the U.S., Britain fire-retardant fabric a product request. The fabric has good resistance to washing , odorless , non-toxic , safe for humans and breathable , soft and comfortable to wear . Applied to clothing, metallurgy , machinery, timber industry , fire and other industries , can be used as upholstery and so on. After the compound with other fabrics are widely used in military clothing, medical garments , casual wear , fire , anti-virus , flooding and other special operations protective clothing , outdoor sports clothing , shoes, hats , gloves and other accessories as well as sleeping bags, tents, rain gear and other materials.
2014年1月14日星期二
Bulletproof high-tech special fiber, aramid fiber fire
Aramid fiber was born in the late 1960 s, initially as the development of material and important strategic goods and materials and the secret is not, added a lot of mystery. After the end of the cold war, aramid as high technical content of the fiber material used in civilian areas, it gradually shows lushan really amused.
Aramid fiber is the full name of aromatic polyamide fiber (English name Aramidfibers), is a kind of new type of special purpose synthetic materials. Because of fiber polymer long-chain molecules contain amide group, so like nylon, both belong to the class of polyamide fiber. But the difference is that constitute a nylon polymer macromolecule chain is connected amide group in fat, and aromatic polyamide fiber is connected amide group in aromatic ring or the derivatives of aromatic ring, so this kind of fiber are collectively referred to as aromatic polyamide fiber and Xinke aramid fabrics for short.
Due to the aromatic base to replace the fat base, molecular chain rigidity increase with the decrease of the flexible, reflected in the fiber performance, and its heat resistance and initial modulus were significantly increased, so the aromatic polyamide fiber is the main categories of organic high temperature resistant fibers. One of the most practical value of varieties has two, one is the molecular chain arrangement is serrated between aramid fiber and the life of aramid 1313; Molecular chain arrangement is a straight line shaped para aramid fiber, for aramid 1414 of life in our country. Both chemical structure similar, but the performance difference is very big, a variety of applications: aramid 1313 for its excellent high temperature resistant insulation to become high quality functional fiber, aramid 1414 excellent metal features make it occupies the important core status in the high performance fibers.
Aramid fiber is the full name of aromatic polyamide fiber (English name Aramidfibers), is a kind of new type of special purpose synthetic materials. Because of fiber polymer long-chain molecules contain amide group, so like nylon, both belong to the class of polyamide fiber. But the difference is that constitute a nylon polymer macromolecule chain is connected amide group in fat, and aromatic polyamide fiber is connected amide group in aromatic ring or the derivatives of aromatic ring, so this kind of fiber are collectively referred to as aromatic polyamide fiber and Xinke aramid fabrics for short.
Due to the aromatic base to replace the fat base, molecular chain rigidity increase with the decrease of the flexible, reflected in the fiber performance, and its heat resistance and initial modulus were significantly increased, so the aromatic polyamide fiber is the main categories of organic high temperature resistant fibers. One of the most practical value of varieties has two, one is the molecular chain arrangement is serrated between aramid fiber and the life of aramid 1313; Molecular chain arrangement is a straight line shaped para aramid fiber, for aramid 1414 of life in our country. Both chemical structure similar, but the performance difference is very big, a variety of applications: aramid 1313 for its excellent high temperature resistant insulation to become high quality functional fiber, aramid 1414 excellent metal features make it occupies the important core status in the high performance fibers.
2014年1月9日星期四
Share the flame retardant fabric washing matters needing attention
1，
when catharsis, fire retardant fabric, under the appropriate water
temperature 30 ℃, clothing with neutral soap or per kg excluding enzyme
detergent 1 g, bath ratio is not greater than 1:40, using light washing
method, avoid excessive friction caused by esd performance degradation.
2， subject to the sun to dry after washing, flame retardant fabrics, or
natural dry after 150 ℃ high temperature pressing for 2 minutes, can
also be used in the 150 ℃ drying used more than 4 minutes.
3, flame retardant fabrics need to dry, ventilated, avoid mechanical or chemical injury.
2014年1月3日星期五
The development of aramid flame retardant fabric
We select and use the aramid fabrics, flame retardant viscose fiber, the comprehensive features of the aramid fiber, flame retardant viscose blended (aromatic/viscose 65/35, 50/50), weaving and dyeing finishing technology research, established from raw material to the spinning, weaving, bleaching, and a series of soft finishing production technology, and through one of the key technology research, developed a durable flame retardant properties of aramid fiber series products, has obtained the good effect. Most of domestic flame retardant textiles for pure polyester or cotton finishing products, widespread feel hard, defects such as low strength, meet the fire melt dripping, set the durability, serviceability, and comprehensive performance in one of the most dependent on imports of high-grade durable flame retardant textiles. In order to develop high quality flame retardant products in domestic and alternative imports,
Raw materials and product performance:
1. Raw material performance
Flame retardant viscose is a kind of cellulose fiber containing silicate. With cellulose as the main body, is formed within the macromolecular silicate molecular network and a large number of chemical combined water. Its physical and mechanical properties and is similar to ordinary viscose fiber, not only the wet absorption gas easy dyeing, and acid and alkali resistant bug eat by moth; Compared with other flame retardant fiber, low cost, no pollution, can be processed into a variety of textiles. And through natural biodegradable become mixed soil organic and inorganic. Under the condition of burning carbonization into non-toxic SIO2. Fiber performance indicators such as table 1. Aramid (NOMEX) as part of the aromatic polyamide fiber, for benzol m-phenylene diamine two between fibers. Excellent heat resistant performance; Good flame retardant performance and chemical resistance; Has a good mechanical performance, high fracture strength, elongation, soft, high temperature softening, not melting, carbide, only when burning smoke concentration is low, and low calorific value, washing, after repeated washing flame retardant performance is good, have better dimension stability and serviceability.
2. Product performance
Products with soft handle, good volume resistance, drapability, wet absorption capability and high strength, wear resistance, good smooth finish and color fastness, as well as in case of fire don't melt drip excellent features, such as carbide to satisfy the requirement of the flame retardant fabric clothing, middle and high quality.
Raw materials and product performance:
1. Raw material performance
Flame retardant viscose is a kind of cellulose fiber containing silicate. With cellulose as the main body, is formed within the macromolecular silicate molecular network and a large number of chemical combined water. Its physical and mechanical properties and is similar to ordinary viscose fiber, not only the wet absorption gas easy dyeing, and acid and alkali resistant bug eat by moth; Compared with other flame retardant fiber, low cost, no pollution, can be processed into a variety of textiles. And through natural biodegradable become mixed soil organic and inorganic. Under the condition of burning carbonization into non-toxic SIO2. Fiber performance indicators such as table 1. Aramid (NOMEX) as part of the aromatic polyamide fiber, for benzol m-phenylene diamine two between fibers. Excellent heat resistant performance; Good flame retardant performance and chemical resistance; Has a good mechanical performance, high fracture strength, elongation, soft, high temperature softening, not melting, carbide, only when burning smoke concentration is low, and low calorific value, washing, after repeated washing flame retardant performance is good, have better dimension stability and serviceability.
2. Product performance
Products with soft handle, good volume resistance, drapability, wet absorption capability and high strength, wear resistance, good smooth finish and color fastness, as well as in case of fire don't melt drip excellent features, such as carbide to satisfy the requirement of the flame retardant fabric clothing, middle and high quality.
2013年12月27日星期五
Flame retardant protective clothing
At present the most commonly used in domestic oilfields are generally made of pure cotton overalls, antistatic fabric, the flame retardant treatment of cotton or polyester smock. Ordinary cotton overalls with daily clothing, can not play a role of explosion prevention and protection. Anti-static clothing can be triggered by electric spark explosion prevention effect, and the flame retardant processing pure cotton or polyester smock has certain protective effect to the deflagration, but these two kinds of antistatic and flame retardant performance clothing will over washing or wear abrasion is abate, once deflagration flame will aggravate degree of burns.
At present, the foreign petroleum and petrochemical enterprises, such as exxonmobil, BP, shell, etc., are using NomexR flame retardant in tooling as a daily work clothes. Developed by du pont NomexRIIIA fabrics containing NomexR, KevlarR fiber antistatic fiber and P - 140. NomexR unique molecular structure gives the NomexR IIIA fabric flame retardant, the nature of excellent thermal protective, P - 140 to make the fabric with antistatic performance, the nature of these performance would not be weakened due to wash or wear. Therefore, in the past 40 years of practice, dupont TM NomexR IIIA fabrics are widely used in petrochemical industry, proved very effective for protection.
Some petroleum and petrochemical enterprises in our country are also introduce the foreign advanced experience in safety management and products, including overseas advanced protective material. Cnooc has long been in the field of overseas use of NomexR fabric flame retardant protective clothing, and last year began to use in its domestic refineries. China's oil in overseas oil field using the NomexR fabric flame retardant protective clothing. Tarim oilfield for the first time in 2007 will have international protection standard of dupont TM NomexR fabrics made of flame retardant protective clothing as a uniform, replaced the previous cotton overalls.
Due to the protective performance of clothing in addition to fabric choice is affected by various factors, such as garment design, use of accessories, including stitches, zipper, reflective tape and so on. Design aspects should be covered the surface of the skin as often as possible, such as not using turndown collar design, etc., in order to enhance the security of garments' integral, the flame retardant and recommended suture, zippers, so as to avoid clothing when meeting deflagration combustion break the whole garment due to attachment, cause the wearer directly exposed to protection of the flame and don't.
In addition, flame resistant clothing also need to pay attention to some details, such as to choose suitable size and slightly loose protective clothing, size is too small will greatly affect the wearing comfort, and affect the operation of flexibility; Don't open collar while wearing protective clothing, for example, don't roll up your sleeves, protective clothing clean oil to deal with, and so on, to ensure that the protective clothing can play the role of the best.
In fact, understanding of flame retardant protective abroad also experienced a process of gradual changes. As is known to all, F1 (F1) race is a deflagration occurred more than petroleum and petrochemical industry. In the early create F1 grand prix drivers on choose match clothes mainly is more comfortable and beautiful. In 1976, three drivers' world championship winner nicky's reach in newberg lindsay way in the car after a fire accident, F1 CheTan began to attach importance to the safety of the clothes. In the past 30 years, F1 driver's uniform for flame retardant, anti high temperature also got continuous development of this purpose.
With the development of national economy, the sound and the health of the legal system and protection consciousness is growing, especially in petroleum and petrochemical enterprises of international cooperation and exchanges, to enhance safety consciousness, flame retardant protection in China's petroleum and petrochemical enterprises will be further promoted.
At present, the foreign petroleum and petrochemical enterprises, such as exxonmobil, BP, shell, etc., are using NomexR flame retardant in tooling as a daily work clothes. Developed by du pont NomexRIIIA fabrics containing NomexR, KevlarR fiber antistatic fiber and P - 140. NomexR unique molecular structure gives the NomexR IIIA fabric flame retardant, the nature of excellent thermal protective, P - 140 to make the fabric with antistatic performance, the nature of these performance would not be weakened due to wash or wear. Therefore, in the past 40 years of practice, dupont TM NomexR IIIA fabrics are widely used in petrochemical industry, proved very effective for protection.
Some petroleum and petrochemical enterprises in our country are also introduce the foreign advanced experience in safety management and products, including overseas advanced protective material. Cnooc has long been in the field of overseas use of NomexR fabric flame retardant protective clothing, and last year began to use in its domestic refineries. China's oil in overseas oil field using the NomexR fabric flame retardant protective clothing. Tarim oilfield for the first time in 2007 will have international protection standard of dupont TM NomexR fabrics made of flame retardant protective clothing as a uniform, replaced the previous cotton overalls.
Due to the protective performance of clothing in addition to fabric choice is affected by various factors, such as garment design, use of accessories, including stitches, zipper, reflective tape and so on. Design aspects should be covered the surface of the skin as often as possible, such as not using turndown collar design, etc., in order to enhance the security of garments' integral, the flame retardant and recommended suture, zippers, so as to avoid clothing when meeting deflagration combustion break the whole garment due to attachment, cause the wearer directly exposed to protection of the flame and don't.
In addition, flame resistant clothing also need to pay attention to some details, such as to choose suitable size and slightly loose protective clothing, size is too small will greatly affect the wearing comfort, and affect the operation of flexibility; Don't open collar while wearing protective clothing, for example, don't roll up your sleeves, protective clothing clean oil to deal with, and so on, to ensure that the protective clothing can play the role of the best.
In fact, understanding of flame retardant protective abroad also experienced a process of gradual changes. As is known to all, F1 (F1) race is a deflagration occurred more than petroleum and petrochemical industry. In the early create F1 grand prix drivers on choose match clothes mainly is more comfortable and beautiful. In 1976, three drivers' world championship winner nicky's reach in newberg lindsay way in the car after a fire accident, F1 CheTan began to attach importance to the safety of the clothes. In the past 30 years, F1 driver's uniform for flame retardant, anti high temperature also got continuous development of this purpose.
With the development of national economy, the sound and the health of the legal system and protection consciousness is growing, especially in petroleum and petrochemical enterprises of international cooperation and exchanges, to enhance safety consciousness, flame retardant protection in China's petroleum and petrochemical enterprises will be further promoted.
2013年12月20日星期五
Flame retardant performance testing methods
On the current international smoldering performance test methods for flame retardant fabric has a lot of, such as China GB, British BS, Canada CGSB, German DIN, American FS, French ANF SNV, Switzerland, Japan JIS, Swedish SIS and internationally recognized standards such as ISO, a set of your own test standards and methods. And varieties of different categories of textile products or finished products, there are different testing methods, such as ordinary textiles (including all kinds of bedding), clothing textiles, including children's pajamas, overalls and flame retardant protective clothing, etc.), decorative, including curtain, curtain, tent cloth, etc.), ground covers (carpet, etc.), and the train, automobile, ship in textile products, etc. Test method can be divided into three categories, vertical test method, test method and tilt (45 °, 30 °) test method, with vertical test demands higher level test is low. The following will GB 8965 compare with other standards.
Take standard GB 8965 is China's national flame retardant. This standard is applicable to industrial furnaces, metal hot working, welding, chemical, oil and other places, engaged in open fires or send out sparks or operating in the vicinity of molten metal, and the combustible matter and angry dangerous places to work by use of flame retardant protective clothing. The reference to the same name in 1988 with the similar international standards and issued standard of industrial flame retardant clothing, and made the detailed rules for the following aspects: the overall performance of flame resistant clothing fabrics, and suture of the flame retardant properties, mechanical properties, flame retardant protective clothing structure design, processing production, product packaging tags and transport, inspection method, etc. Fabric of the flame retardant performance testing methods of GB/T 5455, the test method is similar to the EN 532 is on the surface of the material that vertically ignition 10 s, then according to the test parameters to continue burning time, smoldering combustion time and the length of the damaged fabric can be divided into three levels. Arrangement of the flame retardant fabric, of secondary for qualified, level for excellent product. Test the fabric after 50 times of washing, shall not be less than 3, found in the test for nonconforming products are melting shrinkage phenomenon.
Standard test methods, instruments and equipment to manufacture, demanding conditions, strict operation complicated. Test results can be expressed in the laboratory under the condition of relative safety, flame retardant have good repeatability, but the results can not represent the actual fire, under the condition of risk and the combustion situation. Over the years, the domestic import or design a variety of flame retardant test equipment, test and a variety of conditions, for these standard method, to obtain the good reproducibility, test condition is the key. One of the biggest influence on data was (1) the fabric and the temperature and humidity of the air; (2) the flame size and temperature; (3) all round ventilation (test case), etc.; (4) the sample size and the relative position of a fire. Experiment also found that a variety of standard test method, due to the different requirements and conditions, the results often have difference, sometimes the results of a standard method is better, but for another method, the result is bad or very poor. Various standard test methods, therefore, can only explain in a regulation under the experimental conditions, the burning of fire, heat, or said security, can not explain in the actual fire danger in fire or burning.
Take standard GB 8965 is China's national flame retardant. This standard is applicable to industrial furnaces, metal hot working, welding, chemical, oil and other places, engaged in open fires or send out sparks or operating in the vicinity of molten metal, and the combustible matter and angry dangerous places to work by use of flame retardant protective clothing. The reference to the same name in 1988 with the similar international standards and issued standard of industrial flame retardant clothing, and made the detailed rules for the following aspects: the overall performance of flame resistant clothing fabrics, and suture of the flame retardant properties, mechanical properties, flame retardant protective clothing structure design, processing production, product packaging tags and transport, inspection method, etc. Fabric of the flame retardant performance testing methods of GB/T 5455, the test method is similar to the EN 532 is on the surface of the material that vertically ignition 10 s, then according to the test parameters to continue burning time, smoldering combustion time and the length of the damaged fabric can be divided into three levels. Arrangement of the flame retardant fabric, of secondary for qualified, level for excellent product. Test the fabric after 50 times of washing, shall not be less than 3, found in the test for nonconforming products are melting shrinkage phenomenon.
Standard test methods, instruments and equipment to manufacture, demanding conditions, strict operation complicated. Test results can be expressed in the laboratory under the condition of relative safety, flame retardant have good repeatability, but the results can not represent the actual fire, under the condition of risk and the combustion situation. Over the years, the domestic import or design a variety of flame retardant test equipment, test and a variety of conditions, for these standard method, to obtain the good reproducibility, test condition is the key. One of the biggest influence on data was (1) the fabric and the temperature and humidity of the air; (2) the flame size and temperature; (3) all round ventilation (test case), etc.; (4) the sample size and the relative position of a fire. Experiment also found that a variety of standard test method, due to the different requirements and conditions, the results often have difference, sometimes the results of a standard method is better, but for another method, the result is bad or very poor. Various standard test methods, therefore, can only explain in a regulation under the experimental conditions, the burning of fire, heat, or said security, can not explain in the actual fire danger in fire or burning.
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