News_News_Xinxiang Xinxing Special Fabric Co., LTD.

06/08/2021

The Chairman of the Council for the Promotion of International Trade visited Xinxing for investigation and research

On the afternoon of June 2, Xu Jianjun, a member of the party group of the Municipal Council for the Promotion of International Trade and a four-level investigator, led a team to visit Xinxiang Xinxing Special Fabric Co., Ltd., a member company of the Research Association.

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The Chairman of the Council for the Promotion of International Trade visited Xinxing for investigation and research

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04/23/2020

CP flame retardant knowledge

CP is the abbreviation of PYROVATEX, Huntsman’s brand Pyrovatex CP New, a pure cotton flame-retardant treatment technology, is a patent of Ciba Fine Chemicals (Ciba) of Switzerland. The principle is to use Pyrovatex CP New's patented flame-retardant chemical additives and its process technology to treat cotton fiber fabrics, which greatly shortens the time of continuous combustion and smoldering, and quickly self-extinguishes, and has flame-retardant properties. The fabric treated with Pyrovatex CP New flame-retardant treatment technology has good washing resistance. Generally speaking, the flame-retardant index is still within the standard required value after washing 50 times. Huntsman, the company that makes PYROVATEX, claims that it has been used to process more than 100 million square meters of fabric since its inception in the 1960s.

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11/25/2019

C6 water repellent and C8 water repellent, how should we choose?

With the requirements of the working environment for fabrics and the development of society, waterproofing agent was born, which brings us a lot of convenience and protection. In the pursuit of perfect performance, the transformation from fluorine-free water repellent to superior fluorine-based C8 water repellent, now the performance of C8 water repellent is becoming more and more perfect. But when the performance has just been perfect, it has to change to the fluorine-based short carbon chain C6, which has a slightly poorer waterproof performance. Why is this?

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C6 water repellent and C8 water repellent, how should we choose?

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06/05/2019

Special forces in fabric——flame retardant fabric

Generally, the flame-retardant fabrics we imagine do not burn in everyone's impression. In fact, it is not. Flame-retardant fabrics do not catch fire, but they are not easy to be ignited. The burning rate is slow or it goes out immediately after leaving the flame. There are many corresponding flame retardant standards in the world, such as: EN470-1, EN531, EN532, NFPA2112, NFPA70E, etc. Flame retardant fabrics are divided into fiber flame retardant and post-finish flame retardant. Post-finish flame retardant is divided into one-time and durable flame retardant. Fiber flame-retardant, also called permanent flame-retardant fabric, is the work done in the early stage of the entire fabric-making process. The flame-retardant fiber is mainly used to woven into grey cloth. The flame-retardant effect is permanent and can be maintained for more than 50 washing times. , Any good washing effect, especially the flame-retardant yarn used in polypropylene (polyacrylic, commonly known as acrylic), will curl and carbonize when exposed to fire, and will go out when the fire source leaves. Produces a second fire, it is usually used for clothing fabrics. Disposable flame retardant fabrics are ordinary fabrics that are treated with flame retardants in the later dyeing and finishing. Its biggest disadvantage is that the flame retardant effect disappears or significantly declines after washing. Usually we use it in some occasions where the number of washing times is less, such as Hotel curtains, etc. Durable flame-retardant fabrics usually adopt the "proban" production process. The flame retardant used is a durable finishing flame retardant for cotton fiber and its blended fabric. Its main feature is the use of this After this kind of flame retardant is produced and finished, the fabric can have good flame retardant ability within 50 times of washing. Flame-retardant cloth is not a cloth that people say that it does not catch fire. After a special process, it can prevent the spread of flame and automatically extinguish within a certain period of time. Therefore, the basis for judging the flame retardant properties of fabrics is usually based on the burning rate of fabrics. That is, the flame-retardant finished fabric is in contact with the flame for a certain period of time according to the prescribed method, and then the flame is removed, and the time for the fabric to continue to burn with flame and flameless combustion, and the degree of damage to the fabric, etc. are measured. The shorter the flame burning time and the flameless burning time, the lower the degree of damage, which means that the flame retardant performance of the fabric is better; on the contrary, the flame retardant performance of the fabric is poor. There are currently two main types of flame retardant fabrics ① Finishing flame-retardant fabrics, such as pure cotton, polyester cotton, etc.; flame-retardant fabric finishing is mainly to perform surface treatment on the fabric during the textile finishing process, so that the fabric has flame-retardant properties, and the fabric is flame-retardant finishing The process is simple, the investment is small, the effect is effective, and it is suitable for developing new products. ②Intrinsically flame-retardant fabrics, such as aramid, acrylic cotton, DuPont Kevlar, Nomex, Australia PR97, etc. There is not much difference in the initial flame-retardant properties of the three, but after washing, the flame-retardant properties of the disposable flame-retardant fabric disappear completely.

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Special forces in fabric——flame retardant fabric

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06/05/2019

Several questions about ATPV value

ASTM F1506 (Standard performance specification for textile materials used in protective clothing worn by electrical workers exposed to instantaneous arcs and related thermal hazards) ASTM F1506 has developed performance specifications for flame-retardant textile materials used in clothing for electrical workers exposed to instantaneous arcs and other thermal hazards. The relevant requirements of ASTM F1506 protection include vertical combustion method ASTM D6413 (new material after washing) and arc rating. In addition, the standard requires that the fabric is not easy to be ignited or can contain combustion and extinguish itself after being ignited. The flame retardant performance is tested by the FTM5903.1 vertical burning method (the maximum length of damage after being exposed to the flame for 2 seconds is about 15 cm). The arc rating is assessed by ATPV value or EBT value after passing ASTMF1959 test. NFPA70E electrical safety requirements standard in working environment: The latest version of the NFPA70E standard published by the National Fire Protection Association in 2004 contains all aspects of safe electrical rules in the working environment of various industries. NFPA70E recommends that in the case of arc generation, arc protection and flame-retardant personal equipment must meet the performance standards of ASTMF1506, ASTMF1891 and ASTMF2178 when used, and the revised version requires companies to conduct arc hazard analysis in advance to determine arcs. Safety boundaries. The standard is set in order to protect employees within the arc safety limits, and protect employees by using protective clothing with the ATPV value of the corresponding hazard risk classification. The unit of ATPV value is cal/cm2, which represents the arc thermal protection value, which is used to reflect the maximum protection performance of arc protection materials, especially arc protection clothing. NFPA70E sets safe electricity standards for workers working near live equipment, regulates and designs necessary steps to prevent serious injuries caused by arc accidents. According to NFPA70E regulations, every person working within the arc safety limit (the energy released within this range is greater than 1.2cal/cm2) must be competent and wear appropriate flame-retardant arc-proof clothing. NFPA70E divides the hazard risk classification into 0~4 levels to represent different hazard levels. The minimum risk level is the burn caused by the energy of 4cal/cm2 from the arc explosion, which is the hazard classification of NFPA70E. In order to be adequately protected in the event of an arc explosion, workers must wear thermal protective clothing with an ATPV certified by NFPA not less than Grade 4. Another important rating of arc protective clothing is the HAF rating. HAF stands for thermal attenuation coefficient, which represents the size of the fabric to prevent heat. ASTMF1891 standard specification for arc-proof and flame-retardant raincoats: This standard applies to flame-retardant and waterproof materials for raincoats. Flame-retardant coatings or laminated fabrics can be used to produce clothing. Its flame retardancy is measured by ASTMD-6413 vertical combustion method, ATPV value also needs to be recorded. Measure 5 times by ASTMF1959 arc thermal performance test method and select the smallest ATPV value to record. What is an arc Arc injury generally refers to the arc thermal burn caused by the huge arc heat generated by electricity when the air is ionized when the human body is not in contact with current. Other electrical injuries are often caused by Destructive damage to internal and external human tissues caused when the human body is directly exposed to power current. Under normal circumstances, what people know more about is accidental electric shock. In fact, the more dangerous thing in the power industry is the hidden arc damage. The arc hazard is often different from other electrical injuries. It is often negligible and difficult to avoid without contact. Incidental arc event is defined as a non-subjective and unexpected accident. Compared with deflagration, occasional arc accidents are more common. Arc accidents are very rapid. Because safety devices such as circuit breakers are automatically triggered when an accident occurs, the arc duration is often less than 1 second. The total energy produced by the arc may be more than 3 to 4 times that of a serious deflagration accident. This high energy intensity acts on a small area of the skin in a short period of time and may have a fatal impact on nearby workers. Another significant difference is that deflagration is visible to the naked eye, because smoke is produced during deflagration, half of its heat energy is transferred by convection (flame), and half is transferred by radiation. As for the heat formed by the arc, more than 90% is radiant heat, which means that even if the arc does not produce flames or produces a small amount of flames, it wil

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05/24/2019

Do you know common sense about dyeing?

One.At present, the popular fabrics in the world can be roughly divided into the following categories:1. Cotton dyed fabrics (including yarn cards, straight satin, horizontal satin, plain cloth, thread card, half-line card, pyro, canvas, etc.) 2. Polyester-cotton fabrics (T/C 65/35), the main varieties are the same as cotton 3. Pure polyester fabrics (weaving by water jet and air jet looms) 4. Nylon spinning 5. Polyester and nylon blended 6. Polyester filament and cotton or polyester cotton interwoven 7. Polyester viscose wool type 8. Pure wool fabrics 9. Acrylic fabrics 10. Polypropylene, vinylon, viscose and other fabrics 11. Silk fabric 12. Special fabrics (flame retardant, anti-acid and alkali, oil and water repellent, Teflon, anti-ultraviolet, anti-infrared, coating, anti-static, memory finishing, etc.) Two. dyes are roughly as follows: 1. Shihlin Dyes: (Vat Dyes): Good color fastness, mainly used for dyeing cotton fabrics; 2. Reactive dyes: relatively complete chromatogram, good color fastness, mainly used for dyeing cotton fabrics; 3. Sulfur dyes: mainly used for dyeing cotton fabrics, mainly in black and grass green; 4. Direct dyes: the chromatogram is relatively complete, the dyeing method is simple, but the color fastness is poor; 5. Disperse dyes: good color fastness, complete chromatogram, mainly used for dyeing polyester, nylon spinning, etc., and the amount in the market is large; 6. Acid dyes (acid mordant, acid mordant dyes): mainly used for dyeing silk and nylon; 7. Cationic dyes; used in the dyeing of acrylic fabrics, and can also be used in the dyeing of modified polyester fabrics, with bright colors; 8. Ice dyes (azo dyes): mainly used for dyeing cotton fabrics; 9. Coating: for dyeing and printing fabrics with poor fastness; 10. Fluorescent dye: has a fluorescent effect. three. The shade of fabric color is mainly divided by the amount of dye. 1. The amount of dye below 1% is light color 2. The amount of dye is 1-3% for neutral color 3. The amount of dye more than 3% is dark Four. In the dyeing process, our company mainly comes into contact with disperse, reactive, Shihlin, paint, fluorescent and other dyes. Disperse, reactive, and Shihlin dyes are the most common. For CVC flame-retardant fabrics, a large number of disperse/Shihlin or The dispersion/activation process is carried out. Dispersion/Shilin mainly refers to the dyed dark blue, gray, coffee, and brown; the dispersion/activation is mainly black, orange, orange, scarlet, national flag red, and rose red. The color fastness of Shihlin dyes is good. The color changes before and after flame retardant, but not very large. The color fastness of reactive dyes is also OK, but after a special flame retardant process, the color always changes more or less. Most cotton dyeing is dyed with Shilin or reactive dyes and direct dyes. Shilin dyes are slightly more expensive, reactive dyes are cheaper, and direct dyes are the cheapest. In flame retardant finishing, some additives such as flame retardant, ammonia gas and hydrogen peroxide will change the color of the fabric. The color change of the fabric dyed with Shihlin dye is smaller, but the color change of the fabric dyed with reactive and direct dyes will be larger. , Which direction the specific color changes depends on the type of dyes, performance and auxiliaries used in the dyeing process. Fives. dyeing is generally divided into three types; pad dyeing, jig dyeing, overflow dyeing, and the pre-treatment process is the same. Grey cloth-singeing-desizing-washing-boiling-washing-rinsing (pickling)-mercerizing-drying-dyeing-stenting-flame retardant finishing-stenting-preshrinking-finished product inspection The dyeing batch is generally used for pad dyeing; small batches are generally used for jig dyeing; overflow dyeing is mainly for polyester and polyester cotton fabrics. Polyester dyeing temperature is higher (130℃), and all cotton dyeing is normal temperature dyeing. Six. The main factors that affect the strength of cotton fabrics and polyester-cotton fabrics are as follows: 1. The cooking time is too long or the alkali concentration used during cooking is too high; 2. When bleaching, the amount of bleaching agent is too large or the stacking time is too long; 3. The color of the dyeing is not illuminated, and the strength of the cloth is reduced after the color is stripped and repaired; 4. After finishing the waterproofing agent, etc., the temperature is too high and the time is too long, which causes the strength to drop; 5. When the flame retardant finishes, the oxidation time is too long, and the temperature is too high to cause the strength to drop. Seven. The left, center, and right color difference during dyeing is mainly due to the following reasons: 1. Uneven pad dyeing and dyeing; 2. The pressure of the rollers is uneven on the left, middle, and right during pad dyeing; 3. Caused by different temperatures in the left, middle, a

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