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Posts tagged with “Textile Testing Manhattan”

Vartest’s Outstanding Achievements and Service Recognized by AATCC

Adam Varley, Vartest’s Technical Director & COO was honored to be the recipient of the TCR Service Reward “In Recognition for His Service to AATCC Research Committees”. On Thursday, April 3rd 2014, Adam attended a luncheon at the Crowne Plaza Resort in Asheville, North Carolina, and was presented with this award for “his contribution toward the development of the AATCC Fiber ID Technical Supplement and the continuous updating of AATCC Test Methods 20 and 20A.”

AdamsAward

TB 117-2013: The New Flammability Standard For Upholstered Furniture

Attending the CPSC’s Upholstered Furniture Fire Safety Technology Meeting on April 25th, 2013, where Californian flammability standard TB 117 was a major topic of discussion, provided Vartest with an opportunity to interact in person with stakeholders in the area of upholstered furniture safety, where an important new method, TB 117-2013, is about to come into effect. Video links to details of the meeting are below:

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Part 1
http://www.cpsc.gov/en/Newsroom/Multimedia/?vid=64490

Part 2
http://www.cpsc.gov/en/Newsroom/Multimedia/?vid=64506

Part 3
http://www.cpsc.gov/en/Newsroom/Multimedia/?vid=64503

Part 4
http://www.cpsc.gov/en/Newsroom/Multimedia/?vid=64502

This new standard will be effective on January 1, 2014 and will become mandatory on January 1, 2015. TB 117-2013 is published by the Bureau of Electronic and Appliance Repair, Home Furnishings and Thermal Insulation November 22, 2013.

Current strong interest in reducing levels of flame retardants used in home furnishings have resulted in the adoption of a new standard focusing on cigarette smoldering rather than open flame as the challenge. To pass the new test, both smolder-resistant cover fabrics and barrier fabrics placed under the upholstery fabric are commonly used technologies. This new test method, TB117-2013, is the first activity in this particular area of flammability testing in forty years. It is another example of a consensus-based furniture flammability test that helps keep consumers safe.

Vartest conducts a variety of flammability testing on fabrics, garments, furniture, rigid materials, and more. We anticipate serving the needs of our clients as consensus standard test methods and product performance specifications continue to evolve.

Vartest Reaccredited By A2LA

Vartest is proud to announce our reaccreditation under the American Association for Laboratory Accreditation (A2LA). This marks our laboratory’s eighth year of accreditation.

According to A2LA’s own documentation, “A2LA is the leading US laboratory accreditation body with almost 2,000 laboratories accredited in accordance with the international standard ISO/IEC 17025:2005, about 50% of the total number of 17025 accreditations granted by all other US laboratory accreditation bodies.” Organizations eligible for A2LA recognition (defined by A2LA as “CAB”s, or “Conformity Assessment Bodies”) must pass a thorough evaluation process to determine the quality of their equipment, staff, and performance.

By passing this evaluation, Vartest has demonstrated excellence in the following qualities as defined by A2LA:

• Capability
• Responsibility
• Scientific approach
• Objectivity
• Impartiality
• Measurement traceability
• Reproducibility
• Transparency

Additionally, Vartest’s scope for fabric and textile testing now includes the following test methods:

• ISO 811
• ISO 14184-1,2
• JIS L 1041

We at Vartest extend our sincere thanks to A2LA for their recognition, and will continue to serve our clients with our diverse and ever-growing range of test procedures.

Vartest Accredited to Test For Phthalates Under CPSIA:

Vartest has obtained A2LA accreditation to test for phthalates under the Consumer Product and Safety Improvement Act (CPSIA). This test (designation CPSC-CH-C1001-09.3) provides an excellent complement to Vartest’s lead and heavy metal detection testing services, allowing our laboratory to ensure full safety compliance for a range of materials and products.

Three-dimensional model of a Di (2-ethylhexyl) phthalate, or DEHP, one of the most common phthalates in use.

 

Phthalates are compounds of phthalic acid widely used as plasticizers, chemical compounds which increase the strength and malleability of plastics. Found in or on the majority of plastic or polymeric products worldwide, including toys, textiles, garments, and upholstery, phthalates and plasticizers in general are produced and used by the millions of tons per annum. However, phthalates’ weak chemical bond to the plastics in which they are used (specifically, the lack of a covalent bond) allows them to be relatively easily released into the environment when the plastics age. This process has been associated with certain detrimental effects to the environment, resulting in phthalates’ regulation under CPSIA as of February 10, 2009.

Structural Diagram of DEHP Phthalate

 

Vartest tests for phthalates using the Standard Operating Procedure supplementary to CPSC-CH-1001-09.3, dissolving the sample in a solution of HPLC-grade tetrahydrofuran (THF), precipitating sample polymers with HPLC-grade hexanes, and filtering the solution through a .45μm polytetrafluoroethylene (PTFE) filter. The filtered solution is then subjected to gas chromatography and mass spectrometry (GCMS) to isolate and identify the resultant phthalates. Samples are monitored using both full scan mode and selected ion monitoring (SIM), and our machinery runs a quality control sample each day. Products tested include fabric adhesives, coatings, print applications, children’s products, plastic components of various garments, and other end use items.

Vartest GCMS Equipment

 

Vartest provides testing for the following phthalates:

  • Di-n-butylphthalate(DnBP) (CAS No. 84-74-2)
  • Benzyl butyl phthalate(BBP) (CAS No. 85-68-7)
  • Di(2-ethylhexyl)phthalate(DEHP) (CAS No. 117-81-7)
  • Di-n-octyl phthalate (DnOP) (CAS No. 117-84-0)
  • Diisononyl phthalate (DINP) (CAS Nos. 28553-12-0, 68515-48-0)
  • Diisodecyl phthalate (DIDP) (CAS Nos. 26761-40-0, 68515-49-1)
  • Di-n-hexyl phthalate (DnHP) (CAS No. 84-75-3)

Vartest offers services under CPSIA testing standards for a diverse clientele, and will continue to expand its testing capabilities.

FAST TURN COLOR ANALYSIS TESTING OF FIBER, YARN, FABRIC, APPAREL AND OTHER END USE ITEMS:

Vartest offers fast turnaround time color analysis testing of fiber, yarn, fabric and end use items from its ISO/IEC 17025 accredited laboratory located in Midtown Manhattan. Spectrophotometers available include Dual Beam Sphere for use in retailer color management programs, 45° Illumination and 0° Viewing for fluorescent samples and Dual Beam Sphere with Near Infra Red capability for military programs. All of them are interfaced with state of the art color management and communication software.

These instruments provide objective, quantitative visual color measurement and assessment as well as shade sorting, shade grouping and banding, tapering, lab dip approval as well as objective rating of colorfastness test results such as crocking, laundering, light, storage and perspiration.

Vartest’s color quality control capability provides an Accredited Third Party backup to retailer, manufacturer and importer color management systems. QTX files can be generated and emailed by Vartest containing digital color information on standards, lab dips, production samples and fabric rolls destined for the cutting table.

 

Color Measurement Proficiency Interlab Results Displayed Electronically

Color Measurement Proficiency Interlab Results Displayed Electronically

 

 

Instrumental color measurement systems are operated by experienced technologists with specialized training in color measurement. The visual acuity of operators is checked using the Farnsworth Munsell color vision test in conjunction with Vartest’s calibrated Macbeth light boxes which are used for visual assessments when needed.

STATISTICAL ANALYSIS AND CONTROL CHARTING OF INSTRON 5569 TENSILE TESTING USING INTERACTIVE VIDEO CAPTURE TO DEVELOP GLOBAL QUALITY CONTROL PROGRAMS

Textile testing of cotton sheeting using the ASTM International D5034-09 Standard Test Method for Breaking Strength and Elongation (Grab Test) demonstrates the ability of the laboratory to characterize and provide corrective actions to manufacturers and importers based on the determination of assignable and common causes within the framework of a quality control program. Common causes of variation are those associated with everyday or typical on target mill performance. Assignable causes causes are those associated with a loss of control in the manufacturing process that can lead to production of products that fail important performance specifications.

The sample used comprised a plain weave square cotton sheeting whose structure is shown below using both reflected light and scanning electron microscopy:

 

Light Micrograph Of Plain Weave Textile Structure

Light Microscopy Micrograph Of Plain Weave Sheeting Fabric

 

 

Plain Weave Textile Structure Of Cotton Yarn

Scanning Electron Microscopy Of Plain Woven Structure

 

Testing was performed on Vartest’s Instron 5569 load frame running Bluehill 3 software with real time video capture as seen in the following image:

 

Video Capture Complements Graphical Force Elongation Curve And Tabular Analysis

Video Capture Provides The Ultimate In Specimen Performance Chracterization

 

A 100 specimen sample taken in the warp direction was tested on Vartest’s Instron 5569 Constant Rate of Extension Load Frame with interactive video capture as seen in following force elongation curves:

 

ASTM D5034 Specimens 1 through 25

Specimens 1 through 25

 

Specimens 26 through 50

Specimens 51 through 75

Specimens 76 through 100

 

Breaking force was exported and plotted as a control chart which revealed specimens 20 and 85 displaying variation attributable to assignable causes:

 

Control Chart For Breaking Force

 

Elongation at break was also exported and plotted as a control chart which revealed specimens 19, 20 and 85 displaying variation attributable to assignable causes.

 

Control Chart For Elongation At Break

 

Investigation of video capture files for these specimens revealed slippage at the jaw due to intentionally induced gradually decreasing low air pressure being introduced into the pneumatic clamps as the cause of excessive variation in specimens 20 and 21:

 

For comparison the break characteristics of Specimen 5 showing only common cause variation is shown in the following video:

 

 

Specimen 85 was revealed to be a filling direction specimen that had been intentionally introduced into the test specimen series. While the breaking force of the filling specimen was about 30% lower than the mean, the elongation at break was about 300% higher than the mean; predominantly due to the high level of filling yarn crimp possessed by the filling specimen as opposed to the relatively low amount of warp yarn crimp possessed by the warp specimens as seen in the following video:

Variation in textile quality can be quantified and managed readily with statistical tools used in conjunction with standard test methods and performance specifications.

Gaussian Sort Of Tested Specimens

 

Assignable causes of variation in textile and apparel quality such as uneven application of water resistant finishes, antibacterial finishes and seam slippage performance can all be analyzed and corrected with the aid of these techniques. Accredited quality assurance laboratories inform and control factory supply chains worldwide.

For more information click here for Instron’s Website.