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  • Simple Troubleshooting Of Tensile Testing Machine
    Simple Troubleshooting Of Tensile Testing Machine November 16, 2021
    Users in the use of universal material testing machine, sometimes there will be some failures.  If the user can deal with the failure in time, it can improve the work efficiency of the enterprise, which is especially important when the project is on schedule. So Gester provides users with some common troubleshooting methods, hoping to help everyone. Solution to the failure of material tensile testing machine: 1. The power supply has electricity but the tensile testing machine can not move up and down. Check whether the power supply voltage of the access material tension tester is normal, check whether the upper and lower limit is in the appropriate position, etc. 2. After the tensile testing machine is online, a prompt box appears indicating overload. Check whether the on-line selection sensor is selected correctly, whether the sensor has been hit by accident, whether the communication line of the tensile testing machine has fallen off, check whether the calibration value has been manually changed, etc. 3. Plug it in and use it for a while, and suddenly there is no reaction. Check whether there is any problem with the wiring, whether the socket is plugged in, or the cable is almost cut off by a mouse, and check whether the power supply voltage connected to the tensile tester is normal. Universal Tensile Strength Tester (Dual Column), developed and produced by Gester Instruments, with high precision, the most perfect function, the most stable performance, cost-effective advantages. Tensile strength equipment Application: This Universal Tensile Strength Tester is designed for conduct tensile, compression, bending, shearing, bonding strength, peeling, tearing and other tests for rubber, plastic, leather, metal, nylon line, fabric, paper, aviation, packaging, construction, petrifaction, electrician, vehicle and other materials. universal testing machine is a basic equipment of quality control, receiving inspection, physical test, mechanics research, material development. Universal material testing machine Standards: ISO13934-1, 13934-2, 13935-1, 13935-2, 13936-1, 13936-2, 13936-3, 13937-2, 13937-3, 13937-4, 1421, 2411, 2062, 4674-1, 5082, 9073.3, 9073.4, 9073.18 ASTM D 434, D751, D885 , D1683, D2256, D2261, D2724, D2731, D3787, D4034, D4964, D5034, D5035, D5587, D5733, D5735 . BS 2543, 2576, 3320, 3424, 4303 , 4304, M&S P11, P12, P13, P14 JIS L1096
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  • Influencing Factors In The Hydrostatic Pressure Test Of Fabrics
    Influencing Factors In The Hydrostatic Pressure Test Of Fabrics November 10, 2021
    1. What is the Hydrostatic pressure test Hydrostatic pressure test (also called impermeability test) is one of the important indicators of waterproof and moisture-permeable fabrics. Hydrostatic pressure refers to the resistance encountered when water passes through the fabric. Under standard atmospheric pressure conditions, the fabric is subjected to continuously rising water pressure until water drops leak out from the back of the fabric. At this time, the measured water pressure is the hydrostatic pressure. The greater the hydrostatic pressure that the fabric can withstand, the better the water resistance or leakage resistance. 2. The principle of hydrostatic test of fabric: Through three test methods: dynamic test, static test and program, the test sample is fixed on the test area specified by the standard. The air pressure control puts the air pressure of 0-5bar into a built-in water tank filled with distilled water. A test head is connected to the water tank. After the test starts, the test pressure starts to be automatically controlled. 3. The influencing factors in the fabric water pressure test: (1) tightness of fabric yarn. The gap between yarns will directly affect the water pressure resistance. The closer the general fabric structure, the better its water seepage resistance. (2) the size of the aperture of the coating film. The larger the pore diameter of the membrane, the worse the hydrostatic pressure resistance of the coated fabric. (3) The size of contact Angle 0. When 0 > 90. , the fabric is water-repellent, and the water pressure resistance of the fabric increases with the increase of 0. (4) Coating thickness. The coating is too thin, the coating agent is not easy to continuously film on the surface, and the water pressure resistance of the coating fabric is reduced; The coating is thick and the water pressure resistance of the fabric is improved. (5) thickness of fabric. The thicker the fabric, the greater the wet resistance, the greater the water pressure value. (6) The thickness of yarn. For tight fabrics with good moisture absorption, yarn radius is reduced due to capillary effect. It can improve the impermeability of fabric. (7) the performance of warp and weft yarns. Under the action of water pressure, warp and weft yarns with good elasticity are easy to stretch, which leads to the formation of gaps between adjacent warp and weft yarns, and water droplets are easy to penetrate through, which reduces the water pressure resistance of the fabric. (8) Coating quality. The whole cloth is required to be uniform and has a certain fastness. The better the coating quality, the better the seepage resistance. (9) elasticity of fabric. Elastic fabric, water resistance also has a certain impact (10) The location of the sample and the flatness of the sample also affect the data in the test process. 4. Test standards AATCC 127 Option 2, ISO 811, ISO 1420, GB/T4744 FZT01004, DIN53886, JIS L1092, EN20811, EN 13726-3 The ab...
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  • What is the Box Compression Test (BCT)
    What is the Box Compression Test (BCT) November 02, 2021
    Box Compression Test (BCT) Strength Estimates the BCT of a regular slotted container (RSC) for a moment with flutes positioned vertically. (Note that BCT is not stacking strength, which is the maximum load a box can handle throughout the distribution cycle.) Box Compression Test (BCT)=k1∗ECT×h∗Z−−−−√Reference Mckee formula (simplified version) Where:k1=a constant value of 5.87h= Corrugated FiberBoard (CFB) thickness (inches) Z= box perimeter (inches) = 2(L+W) A BCT test stands for Box Compression Test and this is used to test the compressive strength of a box. This lab is maintained under strict conditions,the boxes tested during a BCT test are placed between two steel plates, and they push with an increasing pressure to each other. At one moment the box crashes and this is the moment you know your BCT value. Factors affecting the test : 1. Moisture in the box and in the environment 2. Handling of the box before the test 3. Flutes in the corrugated board 4. BCT test De Jong Packaging 5. Is the box printed or plain 6. Factors affecting the test 7. Construction of the box 8. Contents of the box 9. Size of the box GESTER Box Compression Strength Tester GT-N02B Type Compression Testing Machine with multi-function and high precision is designed to test the compressive strength of standard size corrugated box, or packages and containers made of other material with a compressive strength smaller than 100kN. With advanced mechanical structure of a pair of threaded shafts &guide pillars and imported motor for control, the testing machine has the following salient features: good parallelism, reliable measure precision and high return speed. Carton Compression Test Standards: ISO2872, ISO2874, ASTM D642, TAPPI T804 Feature Box Compression Tester (Computer Model) is capable of various functions for all parameters in standards, Such as parametric test, display, memory, statistics and print function; data processing function to gain the statistical result of all parameters directly; and automatic reset and fault diagnosis function and easy operation.
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  • About Several Methods Are Used To Measure Tear Strength
    About Several Methods Are Used To Measure Tear Strength October 16, 2021
    Tear strength A fabric tears when it is snagged by a sharp object and the immediate small puncture is converted into a long rip by what may be a very small extra effort. It is the most common type of strength failure of fabrics in end use. For garment items, such as outdoor clothing, overalls and uniforms, the tearing strength test is a very important quantity. Importance of tear strength test on fabrics: The tear strength is the resistance of fabric against tearing. The tear strength is vital for the textiles, bulletproof jackets, worker jeans, tents, apparel, sacks, and industrial applications. If the tear strength is high, means punctures in the fabrics do not propagate easily. The tear strength is vital in the industrial textiles as heavy duty work is performed. Several methods are used to measure tear strength, e.g. Tongue Test Trapezoid Test Elmendorf Test A. Tongue Tearing Strength of Fabrics In this test method, a cut is made in a rectangular specimen, which starts a tear. By cutting the material, two “tongues” are formed. A reference line is drawn to indicate the point to tear. One tongue is placed in the upper jaw and one tongue is placed in the lower jaw. As the test is run, the jaws move apart and the fabric tears along the pre-cut segment. B. Trapezoid Test The trapezoid tear method is a test that produces tension along a reasonably defined course such that the tear propagates across the width of the specimen. The trapezoid tearing strength for woven fabrics is determined primarily by the properties of the yarns that are gripped in the clamps. In nonwoven fabrics, because the individual fibers are more or less randomly oriented and capable of some reorientation in the direction of the applied load, the maximum trapezoid tearing strength is reached when the resistance to further reorientation is greater than the force required to rupture one or more fibers simultaneously. Elmendorf Tear Strength The Elmendorf tear tester determines the tearing strength by measuring the work done in tearing through a fixed length of the test specimen. It consists of a sector pendulum pivoted on anti-friction ball bearings on a vertical bracket fixed on a rigid metallic base. The test principle is fairly simple; the pendulum is lifted up to certain height. When released, the pendulum will have a certain potential energy, at the bottom of the swing the pendulum tears the specimen and the pendulum loses the energy used to tear the sample.
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  • What to Know About Age Ovens
    What to Know About Age Ovens October 09, 2021
    What to Know About Age Ovens There is a specific kind of industrial oven known as an aging oven.  This type of oven is used in the development and testing of certain products in order to simulate what would happen to the item over time.  Age ovens heat up plastic and rubber products, artificially aging them to simulate what would happen over years of use. Many industries also use age ovens to test and finish aluminum parts. Age ovens are essential to many industries. How Age Ovens Work All industrial ovens need good air flow from the supply duct to the return duct. Otherwise, your oven won’t heat evenly. If you’re testing products to see how they’ll age, this will affect future product development. The plastic or rubber product is baked in the special aging oven. The heat reacts with the chemicals that make up the material of the item and creates the same conditions as the natural wear and tear of age, but in a much shorter period.  This artificial aging helps the designer of the product learn how the product will react over time to age and use, which will help the designer make modifications and needed improvements.   GESTER can with you find the perfect age oven for your needs. Aging ovens are available in various sizes and models, depending on the products and industry they are used for. The temperature, size, and design of the oven depends on its intended use. This Aging Oven is used for testing the changes in characteristics of plastics, rubber, leather, fabrics before and after heating.  The specimen is checked to see its discoloration, split, shrinkage, extension, residualratio, etc. so as to determine the aging characterstics.
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  • What Is The Textile Burst Strength Test
    What Is The Textile Burst Strength Test September 28, 2021
    Textile burst strength test The bursting strength of the fabric refers to the phenomenon that when the fabric is partially subjected to an external force perpendicular to its plane, it expands and ruptures, which is called the bursting strength of the fabric. Commonly used bursting strength test methods are: hydraulic method, Pneumatic method, and steel ball method. Hydraulic method The test principle of the hydraulic method is to clamp a certain area of the sample on an extendable diaphragm, and apply liquid pressure under the diaphragm. Then increase the volume of the liquid at a constant speed to expand the diaphragm and the sample until the sample ruptures, and the bursting strength and bursting expansion are measured. Commonly used hydraulic bursting strength tester is GESTER Bursting Strength Tester GT-C12A, Standards: ISO 13938.1, FZ/T 60019, FZ/T 01030, ASTM D3786, BS 4768, WOOLMARK TM 29, WSP 30.1, JIS L 1018.6. 17. Pneumatic method The test principle of the Pneumatic method is: clamp the sample on an extensible diaphragm, and apply gas pressure under the diaphragm. Then, increase the gas volume at a constant speed to expand the diaphragm and the sample until the sample ruptures, and the bursting strength and bursting expansion are measured. Commonly used pneumatic fabric bursting strength tester is GESTER Pneumatic Bursting Strength Tester GT-C12B, standards: FZ/T60019, ISO2960, ASTM D3786, M&S P27, JIS L-1096, ISO 13938-2. Steel ball method The testing principle of the steel ball method is: The sample of a certain area is clamped in the ring sample fixed on the base, the round spherical push rod at a constant moving speed vertically against the sample, so that the sample deformation until the rupture, measured breaking strength. GESTER Ball Burst Strength Tester GT-C02-2, standard: ASTM D 3787, EN 12332-1, FZ/T 01030, FZ/T 60019, GB/T 19976.
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  • About Gester C13 Martindale Fabric Abrasion Tester Series
    About Gester C13 Martindale Fabric Abrasion Tester Series July 08, 2021
    What is the Martindale Fabric Abrasion Tester  The abrasion resistance of textiles refers to the wear resistance between fabrics or between fabrics and other substances during repeated friction.  The Martindale Abrasion Tester is widely used for testing the abrasion resistance of clothing and household textiles, decorative fabrics and furniture. Introduce C13 Series from Application, Standards A. Martindale GT-C13 For Testing The Abrasion And Pilling 1. Appication The Martindale GT-C13 For Testing The Abrasion And Pilling is the standard method of determining the wear resistance of textiles or leather and the resistance to pilling. Samples are rubbed against known abradents at low pressures and in continuously changing directions and the amount of abrasion or pilling is compared against standard parameters. Adaptable to test a wide range of applications including textiles, socks, leather, coated upholstery, carpets, wood and shirt collars.  2. Standards Abrasion: GB/T 21196.2, GB/T 13775, ISO 12947, ASTM D4966, IWS TM 112, M﹠S P19, Next 18, SN 198529, TWC 112, JIS L1096 ( ISO17076-2 ball plate method ,optional) Pilling: GB/T 4802.2, ISO12945-2, ASTM D4970, IWS TM 196, M﹠S P17, Next TM26, SN 198525 B. Martindale Abrasion And Pilling Tester GT-C13B 1. Application The martindale abrasion and pilling tester is used to determine the abrasion and pilling resistance of all kinds of textile structures. Samples are rubbed against known abrade at low pressures and in continuously changing directions and the amount of abrasion or pilling is compared against standard parameters. 2. Standards Abrasion: GB/T 21196.2, GB/T 13775, ISO 12947, ASTM D4966, IWS TM 112, M﹠S P19, Next 18, SN 198529, TWC 112, JIS L1096 ( ISO17076-2 ball plate method ,optional) Pilling: GB/T 4802.2, ISO12945-2, ASTM D4970, IWS TM 196, M﹠S P17, Next TM26, SN 198525 C. Martindale Fabric Abrasion Tester 1. Application Martindale Fabric Abrasion Tester is used to determine the abrasion and pilling resistance of all kinds of textile structures. Samples are rubbed against known abradents at low pressures and in continuously changing directions and the amount of abrasion or pilling is compared against standard parameters.  2. Standards Abrasion: GB/T 21196.2, GB/T 13775, ISO 12947, ASTM D4966, IWS TM 112, M﹠S P19, Next 18, SN 198529, TWC 112, JIS L1096 Pilling: GB/T 4802.2, ISO12945-2, ASTM D4970, IWS TM 196, M﹠S P17, Next TM26, SN 198525 Gester Fabric testing instruments with more than 20 years of research development and technology accumulation, has become the key technology to improve quality and productivity in textile industry.
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  • What is the Hydrostatic Head Tester In Fabric
    What is the Hydrostatic Head Tester In Fabric June 28, 2021
    What is the Hydrostatic Head Tester In Fabric   A. What is Hydrostatic Head?    Hydrostatic Head is a way of measuring how waterproof a fabric is. The resulting measurement in millimetres relates to how high a column of water standing on the fabric would need to be before the water would penetrate the fabric. For the best fabrics results can be as high as 30,000mm, i.e. 30 metres high, before it would penetrate the fabric.    B. Hydrostatic Pressure   The Hydrostatic Pressure test evaluates a material’s resistance to water penetration. The test is done using a machine that replicates the downward pressure that a water column of such height would create. The machine increases the pressure of water that is pushed against the fabric until water is visible on the other side. The required level of pressure used to force water through the fabric is then converted into a measurement of how high the water column would have been. This provides the result of the Hydrostatic Head test in millimetres.    C. WHAT IS A HYDROSTATIC HEAD TESTER? A Hydrostatic Head Tester is a measuring device used to measure the water penetration resistance of fabrics and seams. It provides quick and accurate results. Digital Hydrostatic Head Tester is used to testing the waterproof properties of fabrics through waterproofing work such as canvas, coated fabrics, hood fabric, tarpaulin, rain-proof fabrics and geotextile.    D.The Feature Of High Pressure-Servo Hydrostatic Pressure Test Equipment 1. The pressure using dynamic feedback regulation effectively prevent pressure overshoot.  2. Japan Panasonic servo motor and drive system, 16-bit A/D conversion. 3. Hydrostatic head tester -whole machine with aluminum alloy structure. 4. Sensor protection: automatic overload protection ( automatic switching of multi-sensor range). Hydrostatic Head Tester Touch-Screen display with English menu. Internally installed water tank design and original water pressure balance system makes the rate of rise stable and exact.    E. The hydrostatic head test standard AATCC 127 Option 2, ISO 811, ISO 1420, GB/T4744, FZT01004 , DIN53886 , JIS L1092, EN20811, EN 13726-3
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