CROHMIQ FAQ

 

 


 

What is CROHMIQ® brand fabric?

  • CROHMIQ fabric is a patented, woven polypropylene static protective Type D fabric used in the manufacture of ungrounded bulk bags or FIBC (Flexible Intermediate Bulk Container) for use in flammable gas, vapor and dust atmospheres. FIBC's constructed of CROHMIQ fabric provide static protection by dissipating the static charge buildup on the FIBC and by limiting the energy of discharges to prevent an ignition of the flammable environment.
  • CROHMIQ static protective FIBC's are used by Fortune 500 companies and others in a wide range of applications where flammable gas or vapor such as ethylene, toluene or methane or flammable dust such as corn starch, resins, and fertilizers are present.
  • CROHMIQ FIBC's have an outstanding safety record with an estimated 10 million FIBC's used since 1995.

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Why is CROHMIQ unique?

  • Special patented static dissipative yarns in the fabric dissipate the static charge by corona discharge.
  • The use of CROHMIQ static protective FIBC's eliminates the need for operators to ground the FIBC prior to filling or emptying. The static dissipative performance is provided by the fabric and does not require special FIBC construction methods. The static dissipative property does not deteriorate over the life of the FIBC and maintains its protective properties through multiple refurbishment cycles.

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What is a Type C FIBC?

  • Type C FIBC's use a conductive surface or network to conduct the static charge from the surface of the FIBC to a ground. These FIBC's provide safe and effective static protection only if they are well constructed and properly grounded. All conductive elements within the Type C FIBC must be interconnected to the grounding tab which in turn must be grounded during filling and emptying of the FIBC.

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What is a Type D FIBC?

  • Type D FIBC's do not require grounding to provide safe, effective protection from hazardous static discharges. The fabric has antistatic properties that dissipate the static charges safely to prevent small sparks and potentially explosive discharges. LINQ® Industrial invented Type D technology and was awarded its first patent in 1995. In 2007 Linq's Crohmiq business was acquired by Texene LLC, www.texene.com. CENELEC created the Type D FIBC classification after LINQ introduced its revolutionary CROHMIQ technology.

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Why is a Type D FIBC preferable to a Type C FIBC?

  • According to industry experts, a leading cause of industrial accidents involving FIBC's is a Type C FIBC with a broken or missing ground connection. Isolated Type C FIBC's are extremely dangerous because they can produce energetic sparks that can easily ignite flammable gas and vapor and most flammable dust atmospheres. The proper grounding of Type C FIBC's are prone to human error. FIBC's made of CROHMIQ static protective Type D FIBC fabric have no special construction requirements and do not require grounding.

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How are static hazards identified?

  • The potential static hazards at the locations where FIBC's are filled and emptied are dependent on the type and form of the product conveyed, the material handling system during filling or emptying, the flammable environment, and the safety procedures in use. Just as an FIBC has a 5:1 or 6:1 safe working load, the FIBC should have a level of safety on static protection. An evaluation of the materials used, machinery, and processes is required to determine the static discharge hazard.

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What are CENELEC and the IEC?

  • CENELEC, the European Committee for Electrotechnical Standardization, was created in 1973 and is a non-profit technical organization composed of the National Electrotechnical Committees of 23 European countries.
  • The IEC (International Electrotechnical Commission) was founded in 1906 in St. Louis, Missouri, and is presently comprised of 40 countries including the U.S.A. Its stated purpose is to establish standards for a wide variety of electrical products to encourage international trade.

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How are Type D FIBC's tested?

  • Charging rate (current), Minimum Ignition Energy (MIE) of the flammable material, and relative humidity are the critical test parameters to establish performance.
  • There are two test methods currently used.
  • The method that closely simulates industrial handling of powders uses a test apparatus that fills and empties a FIBC with polypropylene pellets under controlled environmental conditions. A flammable gas probe is used to measure the ignition hazard of the static discharges from the FIBC using gas mixtures of different MIE. This method is being incorporated in proposed test standard 61340-4-4 by the IEC. An alternate method uses corona spray charging of the internal surface of an empty FIBC together with charge transfer measurements to determine the ignition hazard. This method has not yet been correlated to actual industrial applications and conditions.

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What testing has been done on CROHMIQ?

  • CROHMIQ FIBC's have been successfully tested using both methods since 1995 by leading test laboratories, customers, and even competitors under a wide variety of test conditions. Texene maintains a state of the art testing facility as part of its ongoing commitment to safety, research, and new product development.

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Can a CROHMIQ FIBC be reused?

  • CROHMIQ static protective FIBC's have been refurbished with wet and dry cleaning processes and reused by customers. A properly designed program for refurbishment including safety testing may allow multiple reuses of a CROHMIQ FIBC.

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How do you evaluate a Type D FIBC?

  • When purchasing Type D FIBC for your application, it is important to understand the nature of the static hazard and the level of safety required to protect your employees and customers. The FIBC is just one element of an electrostatically safe and effective material handling system. Look carefully at the test method, the MIE, and the charging rates used, to determine safe performance level.

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Where are CROHMIQ FIBC's purchased?

  • Texene is proud to offer CROHMIQ fabric to a global network of FIBC Suppliers like us here at JumboSack. We can design, produce, and deliver FIBC's made of CROHMIQ static protective Type D FIBC fabric to your specifications anywhere in the world. CROHMIQ fabric is available in two colors, CROHMIQ blue™ and CROHMIQ white™.Return to Top


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