跳至主要内容

博文

目前显示的是 九月, 2019的博文

Steps of testing colorfastness to crocking

Colorfastness to rubbing or crocking is a basic testing procedure of a garments or fabric. Crocking fastness takes the staining degree of white fabric as grading principle, 5 grades in total. The higher the value, the better the crocking fastness.After producing fabric it is badly need to take a test of crocking. Crocking is like rubbing a period of time with a minimum cycle. So here we are showing you how to do colorfastness to crocking. Colorfastness to rubbing or crocking is nothing but a combination of dry and wet rubbing test.   There are basically two steps in colorfastness to rubbing or crocking. In basic procedure we generally follow the following steps:   Colorfastness to rubbing or crocking in dry fabric is the first steps of rubbing test. In textile manufacturing process it is called dry rubbing test.First one object (fabric or garments) should have to select which needs to test with crocking meter.   Crockmeter is a testing machine by which colorfastness...

Limiting Oxygen Index

       OXYGEN INDEX TESTER is a widely used, but frequently misinterpreted test which provides a single figure related to ignitability.The high temperature oxygen index tester is designed and de-veloped according to ISO4589-3 (Elevated-temperature test) and British Naval Engi-neering Standard NES 715. Based on the general intelligent oxygen index instrument ,the high temperature oxygen index tester adds a electric-heating device at the position of the combustion cylinder to preheat the mixed gas and test the ignition temperature of the different materials at a certain oxygen concentration.      Limiting Oxygen Index (LOI) is the per cent concentration of oxygen at which a small specimen will only just burn downwards in a candle like manner. The test is probably the most well-known of the standard fire tests. The apparatus holds a small specimen of material which is clamped vertically in a tube in an atmosphere where the relative concentration of o...

What Is A Cone Calorimeter

      Cone Calorimeter has been produced to meet all existing Standards (including ISO 5660, ASTM E1354, ASTM E1474, ASTM E1740, ASTM F1550, ASTM D6113, CAN ULC 135 and BS 476 Part 15) and can also be purchased in modular form so that those laboratories with particular interests such as heat release, mass loss, smoke production, etc. It can initially purchase the sections they require and later add further instrumentation into the same cabinets in order to complete a full specification instrument. This is just one of the advantages of the Cone Calorimeter.      The Cone is a fire testing tool based on the principle that the amount of heat released from a burning sample is directly related to the amount of oxygen consumed during the combustion. The amount of heat a material generates is directly aligned with the severity of a fire, such as fire growth rate. In order to access the material flammability it is exposed to an external radiant heat source. ...

Two Standards For Gloves Cut Testing

     Two standards are used to evaluate the cut protection levels of gloves. The American National Standards Institute/International Safety Equipment Association (ANSI/ISEA) 105 "American National Standard for Hand Protection" is the U.S. standard for glove testing.          The European standard – EN388 "Protective Gloves against Mechanical Risks" – is the European Union (EU) standard for glove testing and it also is referenced globally. Both ANSI/ISEA 105 and EN388 are used to test gloves for mechanical risks such as abrasion, cut, tear and puncture, with cut ratings generating the most interest amongst glove users.       EN 388-2016 uses different level groupings and references two different cut test methods in the revised standard. The use of the second test is dependent upon the results of the first. The first test uses the coupe test and a rotating blade under a fixed weight is moved back and forth on the surface...

Spray Rating Tester For Measuring The Water Resistant Efficiency

        Water repellency is an important property of textile fabrics to measure the efficiency of water resistant/repellant finishing applied on textiles.Spray Rating Tester is the appropriate equipment to test the property spraying a specified volume of distilled water is sprayed on a Test specimen, which has been mounted on a ring and placed at an angle of 45°, so that the center of the specimen is 150mm below the spray nozzle. The Spray rating is determined by comparing the appearance of the specimen with AATCC Spray Test Rating Chart.        Spray Rating Tester  is not intended to predict waterproofness, since it does not measure the penetration of water through fabric. It is designed to determine the surface wetting resistance of any fabrics, which may or may not have been given a water-repellent finish.The instrument comprises a stainless steel framework, incorporating a funnel. The spray nozzle is mounted on the neck of th...

The Design of Glove cutting Resistance Testing Machine

Two standards are used to evaluate the cut protection levels of gloves. The American National Standards Institute/International Safety Equipment Association (ANSI/ISEA) 105 "American National Standard for Hand Protection" is the U.S. standard for glove testing. The European standard – EN388 "Protective Gloves against Mechanical Risks" – is the European Union (EU) standard for glove testing and it also is referenced globally. Both ANSI/ISEA 105 and EN388 are used to test gloves for mechanical risks such as abrasion, cut, tear and puncture, with cut ratings generating the most interest amongst glove users.  EN 388-2016 uses different level groupings and references two different cut test methods in the revised standard. The use of the second test is dependent upon the results of the first. The first test uses the coupe test and a rotating blade under a fixed weight is moved back and forth on the surface of the glove until cut-through. The results are then compared t...

Study on Footwear Bending Tester

      Footwear is clamped to the machine at the toe end by using the appropriate toe clamp from one of five pairs supplied. The heel end is secured to the flexing bar. A predetermining counter is fitted and once the appropriate number of flexes has been registered, the machine will stop so that the shoe can be inspected. The moving parts of the machine are covered by a hinged guard which is fitted with the latest safety device to prevent access while the machine is still in use.  The machine is robust and non-corrosive materials are used in the relative components required.. A similar machine is available for testing high leg boots where water depth can be increased to cover the whole forepart of the footwear, highest to the metal ring area.Details available on request.    The  Footwear Bending Tester  is supplied in both single or twin station models and the operation simulates the flexing of footwear during wear. The angle of flex is adju...

What is the Aim Of Glow Wire Tester?

     For electrotechnical products, IEC 60695 indicates that the risk of fire is present in any electrical circuit which is energized. With regard to this risk, the objective of component circuit and equipment design, and of the choice of material, is to reduce the likelihood of fire, even in the event of foreseeable abnormal use, malfunction or failure. The practical aim is to prevent ignition due to the electrically energized part but, if ignition and fire occur, to control the fire, preferably within the bounds of the enclosure of the electrotechnical product. The best method for testing electro technical products with regard to fire hazard is to duplicate exactly the conditions occurring in practice.The best instument for Glow Wire Test is glow wire testing instrument  In most instances, this is not possible. Accordingly, for practical reasons, the testing of l products with regard to fire hazard is best conducted by simulating as closely as possible the actu...

Safe Design Of Melt Flow Tester

Melt Flow Testers are specifically designed for easy and accurate measuring of the Melt Flow Rate (MFR) and the Melt Volume Rate (MVR). Melt Flow Testers has been designed to determine the melt flow index property of thermoplastics. Any other attempt to use this instrument in any fashion other than its intended use may expose the instrument or the operator to dangerous. Sturdy design includes housing for temperature and steel test cylinder, which is heated by a precision dual zone, insulated and jacked in a columniform housing. A tool rack is provided for convenient access to frequently used operating tools. The Basic Unit Of Melt Flow indexer consists of Temperature Measure Element, Temperature Control System, Automatic Cut-off System, Automatic Timing system, the Control Panel, the Pull Handle and the Tool Rack. Temperature Measure Element:A platinum RTD probe senses the cylinder temperature, sending the temperature signals to the temperature controller, which regulates the...

UL 94 Vertical Combustion Tester for grouping the material

UL94 horizontal and vertical combustion tester is designed to simulate the early firing situation of electronic and electrical products in order to evaluate the firing hazard through this simulation technology.When all of the flame test data has been gathered, it’s used to group the tested material into one of three specific material classes: 94V-0, 94V-1, or 94V-2. Below you’ll find the requirements for each classification. UL94V-0:Following either or both of the controlled flame applications, samples may not sustain burning combustion for longer than 10 seconds.Total flaming combustion time for 5 samples (counting both controlled-flame applications) may not exceed 50 seconds.None of the samples may be burned up to the mounting clamp by either flaming or glowing combustion.None of the samples may drip flaming particles that result in the ignition of the surgical cotton below them.Following the removal of the second controlled flame, samples may not exhibit glowing combustion for m...

Textile Burst Tester For Fabric Materials

The Textile Burst Tester is designed for measuring the bursting strength of fabric materials subjected to an increasing hydrostatic pressure. This pressure is applied to a circular region of the specimen via an elastic diaphragm. The specimen is firmly held round the edge of this circular region by a pneumatic clamping device. When the pressure is applied, the specimen deforms together with the diaphragm. The bursting strength corresponds to the maximum pressure  supported by the specimen before failure. Identical, in the principle to the multi-directional tensile test, Ball Burst Method for Fabrics, this measurement is independent from the cutting direction of the sample (machine or cross) since the failure naturally occurs in the least resistance direction. The rubber diaphragms with specific thickness and shore hardness must have a bulge versus pressure pattern within the tolerance of the standards related to the type of material tested. Auto Bursting Strength Tester ,...