Rubber vulcanized or thermoplastic- Accelerated aging and heat resistance tests- Air oven method 1. Principle: Test pieces are subjected to high temperature and at atmospheric pressure, after which specified properties are measured and compared with those of unaged test pieces.The physical properties concerned in the service application should be used to determine the degree of deterioration but, in the absence of any indication of these properties, it is recommended that tensile strength, stress at intermediate elongation, elongation at break and hardness be measured. 1.1 Accelerated ageing by heating in air In this method, with the low oxygen concentration, the oxygen can’t fully diffuse into the rubber to keep oxidation synchronous, even if the oxidation rate is fast. Therefore, when a sample of the thickness specified in the standard test methods is suitable for using in this method, it may give erroneous results for the rubber with poorly aging resistance. 1.2  Heat resistance test In this test method, the test pieces are subjected to the same temperature as they would experience in service in the stipulated time, then test the appropriate properties and compare with unaged pieces. 2.Apparatus: 2.1 Aging Oven which shall be fulfilled below requirement: Equipped with forced air circulation device, air flow rate 0.5m/s～1.5m/s, the min. Surface area of test piece shall be against airflow to avoid the rate of airflow be interfered. The oven shall be of such a size that the total volume of the test pieces does not exceed 10% of the free space in the oven. Provision shall be made for suspending test pieces so that they are at least 10mm from each other and, at least 50mm the sides of the oven. The temperature of the oven shall be controlled so that the temperature of the test pieces is kept within the tolerances of the specified test temperature; A temperature sensor shall be placed inside to record the actual ageing temperature. No copper or copper alloys shall be used in the onstruction of the heating chamber. Provision shall be made for a slow flow of air through the oven of not less than three and not more than then air changer per hour. Before entering the aging chamber, the air should be heated to within the tolerances of the test temperature specified by the aging oven. The Eligible GESTER Machine: GT-KD01 Aging Oven The other apparatus for rubber properties measurement above mentioned: GT-K01 Universal Testing Machine GT-KD09-LX-A Shore A Durometer 2. Test pieces The test pieces preparation should follow GB/T 9865.1 It is recommended that the accelerated ageing or heat resistance test carries our on the test pieces conditioned as per GB/T 2941, and no on the completed products or sample sheet. The aged test piece will no be required for mechanical, chemical or heat treatment. The number of specimens before and after aging is usually measured in five and should not be less than three. Only test pieces of similar size shall be comp...

Have you ever think about your chair is safety enough? Reports of various safety issues with chair products have become commonplace in recent years. This also effect customers when they are purchasing the furniture, not only concern about the price but also focus on the quality and safety factors, It is understood that the developed countries like the United States and European countries that attach great importance to the detection of furniture. A high-quality furniture product is produced after passing several procedures (many comprehensive tests). Test Standards such as BIFMA X5.1—2017 , EN 1728. So, what’s the role of furniture testing equipment in the company? What kind of test equipment does the manufacturer or the enterprise needed to check the qualified safety of the products? What kind of test that chairs need to do? Generally detected from the following points: Functional test: (using BIFMA X5.1-2017 as an example) 1. Chair seat impact static pressure test. 2. Chair backrest thrust test. 3. Chair armrest pressure test (10 degree pressure test). 4. Repeat the stress test on the front edge of the chair. 5. The chair arm pulls and pulls down the test. 6. Chair stability test 7. Chair caster fatigue test, etc. Performance evaluation:After passing the above test, evaluates the performance of the chair. Security test: 1. The material of the chair is the same as that on the user's manual or quality assurance. 2. The material of the chair is harmful to the human body. 3. When the chair is worn, there is no possibility of scratching or scraping the user. 4. Is it safe to sit in a chair? for example, when sitting only in the front part of the chair, the chair will not lose its balance and so on. 5. Whether the chair is stable when people sit or step on the chair, ie they do not shake. The above is only a brief list for the aspects of a chair that need to be tested. So, what kind of testing equipment that manufacturers are needed for chair test? Here are the brief description of the specific machine for your reference. Chair Armrest Durability Testing Machine: Tests the strength and durability of the armrests, seats or other components by simulating the load on the seat during daily use. Chair Seating and Back Testing Machine: Test the strength and durability of the seat and backrest by simulating the daily use load of the seat. Caster and Base Durability Testing Machine: For use with casters or chair base seats with casters and castors to assess the ability of the castor, chair frame, or seat to withstand the fatigue stress and the ability to move the chair back and forth. Backrest and tilt mechanism durability testing machine: The first test is to assess the chair's ability to withstand fatigue stress and backrest backrest wear. The second test assesses the ability of the tilt mechanism to withstand repeated fatigue due to fatigue and wear. In this way, companies can detect unqualified products based on testing instruments, analyze quality probl...

In the textile industry, in order to ensure the ultimate quality, some equipment is usually used for inspection, such as whether it will be wear-resistant, etc., among which the prominent pilling problem. GESTER Instrument Equipment Co., Ltd. briefly introduces four kinds of textile pilling test normal method. Pilling box method: It is mostly used for balling test with wool fabric or wool-like fabric.Overview of the method: The sample is mounted on a cork cylinder liners and it is optionally turned in a wooden box with a constant rotational speed and cork lining. In the absence of agreement or regulation, it is recommended that the woolen fabric be turned 7200 rolls (i.e. 2 hours) and the worsted fabric inverted 14400 rolls (i.e. 4 hours). The test completes the visual description of fluffing and/or pilling performance. Instruments used: Pilling Box, ICI Pilling and Snagging Tester GT-C18 Random Tumble Method: Method Overview: Take three specimens from each laboratory unit. Take the specimens evenly spaced across the width of the laboratory sample or from three different panels in a garment. Specimens should be staggered in such a manner that no two specimens contain the same yarns. Avoid areas with wrinkles and other distortions. Using the random tumble-up pilling box was subjected to random tumble friction for 30 minutes in a cylindrical test chamber covered with a cork liner and filled with a small amount of grey short-lived cotton. The visual evaluation of the pilling performance was made under the specified light source conditions. Instrument used: Random Tumble Pilling Testing Equipment GT-C19A Compass track method: Method Overview: According to the prescribed method and test parameters, nylon brushes and fabric abrasives or only fabric abrasives are used to frictionally pill the specimens. Take a circular specimen with a diameter of 113mm and the test surface is mounted outward on the chuck. The grinding table is a test method of two materials. The fabric is rubbed with a nylon brush and tested with a standard fabric. After the test is completed, a visual description of the pilling performance is evaluated under the specified light source conditions.Instrument used: Surface Fuzzing and Pilling Tester GT-C16 Martindale Method: Method Overview: Under the specified pressure, the circular sample rubs against the same fabric or standard wool fabric abrasive with the path of the Lisa Ru graphic, and the sample can rotate freely around a central axis perpendicular to the sample plane. After the prescribed friction stage, ratings are visually described.Instrument used: Martindale Abrasion and Pilling Tester GT-C13B At present, there are four types of conventional pilling and snagging test methods for textiles.If you want to know more, get quotes and catalogues, please contact us：info@gester-instruments.com

The US Taber Abrasion Resistance Tester (ASTM D3884 Abrasion Resistance of Textile Fabrics ) is used to interpret the wear resistance of metals, coatings, plate surfaces, coating materials, textiles, leather, and rubber, etc. The first step, Calibrating wheels. A: Rubber-base Wheels Calibration (eg. CS-10, CS-10F, CS-17) (1) A new set of rubber-base wheels must be refaced twice for 50 cycles; (2) If the used wheel is less than 1000 cycles before use, refaced 25 cycles or 50 cycles (recommended refaced 25 cycles); if it is greater than or equal to 1000 cycles, pre-refaced 50 cycles. (3) For every 1000 cycles of the wheel during the test, 25 or 50 rotations must be refaced.   B: Vitrified-based wheels Calibration ( eg. H-10, H-18, H-22, H-38) Not need to refacing unless the surface of the wheel is are marred or chipped; every 300 cycles, clean particles using an air hose durinf the test. Sampling: 150mm*150mm, 5 pieces (actual sampling 100cm²), for samples with width less than 125mm, the entire width for samples is used. The second part of the United States Taber Abrasion Tester, the specific operation: 1.Set the appropriate grinding wheel and load as required. Grind the fabric to a specific end point and record the final number of revolutions; the end point may include Pass/Fail criteria, such as: loss in breaking strength, yarn breakage, coating/gloss/gloss loss, appearance of pilling and other changes; if the customer Have their own requirements, according to customer requirements as the end. 2.Recording the number of sample rotations and take the average of 5 samples. End point judgment: Woven fabrics: break a single line Non-woven: Frayed at least 0.5mm in diameter Knitted fabric: 1 yarn broken, forming a hole Fleece: Flue finish references: 2007 and previous versions: Grinding wheel: CS-10 Load:> 240g/m2, 500g/rev ≤ 240g/m2, 250g/rev 2009 Edition According to use table ASTM D3884: Test of Friction Wheels and Heavy Hammer Loads, 2009 Edition Type of fabric Grinding wheel Load (g) Textile fabrics ≥100g/m2<240g/m2(medium) CS-10 500 Textile Fabrics <100g/m2 (Lightweight) CS-10 250 Fleece CS-10 500 Coated fabric H-18 1000 Automotive Fabric CS-10 1000 Decorative fabric H-18 500 Textile Fabrics (Other) H-18 1000 Non-woven fabric H-10 (Temporarily absent) 250 Automotive Leather CS-10 1000 Dyed Leather CS-10 500 Other durable leather H-18 1000 Car carpet CS-10 1000 Carpet (wide) H-18 500 US Taber Abrasion Tester Principle: An "X" type of friction is created by the rotation of a pair of friction wheels.

Color fastness is a type of color fastness, also known as color fastness or color fastness to bleed, which refers to the migration of dye or residual floating color on the fabric, mainly reflecting the fabric after washing or being exposed to rain. The degree of contamination that causes dyes to elute at dyeing sites and shift to white or light-colored base fabrics comes from Japan. It is also called the "big pill method" in the Japanese test method. Color weeping fastness has now become one of the common testing items for Japanese singles. Generally speaking, it is required to reach level 4 or above 4-5, which is mainly manifested in medium and dark colors. It is often associated with color fastness. Good color fastness and good weeping fastness will also be good. The improved color fastness of cotton fabrics can be improved and strengthened from the following major aspects: 1.choose the right dye Because the dyes are often accompanied by a small amount of incomplete dyes in the synthesis, the presence of these dyes will not only affect the color fastness but also affect the other color fastness. Therefore, the color fastness test should be done before use. At the same time, attention should be paid to the use of reactive dyes in which the water-soluble groups in the dye structure are not too high and the directness is intermediate. 2.Pay attention to the impact of water quality The calcium and magnesium ions in the water will form insoluble matter with the dye and adsorb on the surface of the fiber, becoming floating color and hindering the diffusion and penetration of the dye, reducing the color fastness and even affecting the shade and vividness. Therefore, soft water or chelating dispersant must be added. Wait. 3.to strengthen the washing and soaping process The residual alkali salts on the fibers, hydrolysis, and the floating color of the unbound dyes are the key factors affecting the fastness, and high-performance anti-soap soaping agents with excellent properties should be selected, and soaps should be soaped under neutral or weak acid as much as possible. Higher temperatures are used to wash off unbound dyestuffs inside the fabric, but it is also important to note that too high a temperature can cause breakage of bonded dyes, especially under alkaline conditions. 4.using solid color processing The use of excellent cations and reactive fixatives can block the water-soluble groups of the dyes, making the dyes insoluble in the lake and depositing in the fibers, reducing the water solubility of the dyes, while a small amount of hydrolyzed dyes can also participate in the fixation. Cross-linking further increases the binding force with the fiber, thereby effectively improving the wet processing of the dye, the fastness of the color cry, etc., and if necessary, individual deep color shades can also be subjected to a re-fixation process. Of course, in addition to paying attention to the above points, whether the quality of the grey cloth itself...

The colour fastness of textile is meaning the fading degree of dyed or printed fabric that undergo the effect of external factors (including extrusion, friction, washing, rain shower, exposure, light, seawater impregnation, saliva impregnation, water stains, sweat stains, etc.)during the using or process,it is a important index of textile.The product has good colour fastness and it not easy to lose color during processing or using;otherwise it will appear some states like drop or stain and cause a lot of trouble. The most conventional problem of colour fastness of textile as below: 1、Sun fastness is not up to standard: The clothing during the dressing ,the color of the part of clothing that more exposed to sunlight begins shallow or discolored (usually is the back and shoulders), where there is no or less exposure, the color is constant or light. People will not use the product that the color is different in depth. 2、Colour fastness to washing, soaping and dry cleaning is not up to standard:Clothing fading after washing.The silk,wool,cotton clothing is easy to have such problems mostly.   3、Color fastness to friction is not up to standard:Textile during using,there is different fading degree in different part that has different degrees.And the part most easy to fading is jacket, sleeve, elbow, collar, and armpit,also the buttocks and knees of the trousers.      The product has poor color fastness that brings the bad shopping experience for consumer and the bad influence for brand public praise.Due to reduce this negative effect for minimum level,we should launch a strict test about color fastness when the product is finished. GESTER is a company specialized in textile testing equipment,there are some Colour fastness testers from us will introduce for you to strength the color fastness and improve the quality of product ,as below: 1、GT-D07  Colour Fastness & Fabric Washing Fastness Tester 2、GT-D09  Fabric Color Fastness To Perspirometer 3、GT-D02  Environment Xenon Weathering Test Chambers 4、GT-D04  AATCC Electronic Crock Meter

Textile Sample Color Fastness To Rubbing  The whole process of color fastness to rubbing. Principle: This test is designed to determine the degree of color which may be transferred from the surface of a colored fabric to a specify test cloth for rubbing (which could be dry and Wet). Equipment that needed for measurement: 1. Crock Meter GT-D04. 2. Cotton Rubbing Cotton. 3. Grey Scale 4. Stop Watch 5. Color Matching Cabinet GT-D08. Size of Fabric: You will need to have 14 Cm * 5 Cm pieces of textile fabric sample (one warp direction/wale direction and other weft/course direction). Test Procedure of Color Fastness To Rubbing: a)Lock the test specimen (textile sample) onto the base of the crock meter. b)Using the spinal clip, set 5 Cm * 5Cm of the white cotton fabric to the finger of the crock meter. c)Lower the covered finger on the test sample. d)Turn hand crank at the rate of the one turn per second. e)Remove the white rubbing test cloth and e valuate with grey scale. Evaluation In this stage compare the contrast between the treated and untreated white rubbing cloth with grey scale and rated 1 to 5.

Crockmeter rubbing fastness tester, repair the damaged rubbing finger, clip and abrasive paper. Accidental damage to the rubbing finger, spiral clip or abrasive paper should be repaired as follows: neatly renew the abrasive paper; bend the clip further open or shut around a rod slightly smaller in diameter than the crock peg; resurface the finger by movement on an extra piece of fine emery cloth in a manner simulating regular use.