Concerning the comfort and safety, the focus on performance of footwear slip resistance is becoming more and more stressed nowadays. This essay, based on the domestic and abroad researches, put emphasis on the main factors which influence the footwear slip resistance. Together with the testing machine and testing method to assess the performance of footwear slip resistance, it also gives some suggestions on how to improve the the test method and how to perfect the slip resistance. 1.The influencing factors The performance of slip resistance is one of the most important physical project which involved in the sole material quality and wearing safety & health & comfort property. In recent years, European Union and the relevant organizations in the United States are extremely concerned about the potential damage that caused by the failure of slip resistance performance. Many shoes which sells on the market has been recalled because of the unqualified slip resistance performance, mainly related to children’s shoes, plastic shoes and other shoes. 2.Description on Performance of Slip Resistance When walking, the foot (shoes) will pause for a moment on the ground where it landed. There is a coefficient of static friction (SCOF) between the sole and the road. If the SCOF is too small, the foot will slide on the ground, there will be a dynamic friction coefficient (DCOF) between the sole and the ground. If the value of DCOF is enough to prevent this kind of sliding of the shoes, the probability of slipping or falling will not occur or the occurrence is small, so safe walking requires the shoes to be subjected to the traction force which is not greater than the friction force it receives. According to Newton's second law, when the pressure is constant, the frictional force of the shoe depends on the friction coefficient. Therefore, the friction coefficient becomes the evaluation standard for the anti-slip performance. 3.Test Method for Footwear Slip Resistance There are many test methods for friction coefficient, and the shoe slip resistance tester is also various. According to the test principle of friction coefficient, the anti-slip performance method can be divided into horizontal bottom plate oblique thrust method, horizontal bottom plate drag method, tilt angle test method and Pendulum measurement method 4 categories. 3.1 Principle and Measuring Method of Horizontal Floor Oblique Thrust Method 3.1.1 James slip resistance tester The test method for the James anti-slip performance tester is specified in ASTM F489-96 "Testing Methods for Using James Machines" and ASTM D2047-99 "Test Method for Measuring Static Friction Coefficient of Floor Surfaces Using Brighteners with James Machines". As a hinge strut slip tester, the James machine applies a constant vertical pressure on the flat tested specimen and then gradually increases the lateral thrust until it is slipped. At this time, the lateral force is the measured sliding static friction and its ra...

Why the high heels are not stable and cause the fall down? As a consumer, when choose shoes, if unqualified steel shanks will greatly reduce the comfort degree and safety factor of leather shoes.  What is the shoe steel Shank? The footwear steel shank is a shoe (boot) made of a metal material. Most male/female shoes have a steel shank that is placed between the outsole and the insole at the center of the foot. We can't directly see the shoe steel shank from the outside, but it plays an important role in the quality of leather shoes, especially medium and high-heeled shoes. Shank Type:  1.By users: men's shoes shank, women's shoes shank, children (big children) shoes shank; 2.By steel shank shape: I-shaped shank, Y-shaped shank, L-shaped shank (L type is used for women's high heels, the back part is bent downward to form the short side embedded in the bottom of the molding), as shown below: The Importance for steel shank The steel shank is one of the main force-receiving parts of the shoe, which plays an important role in maintaining the curvature and stability of the sole by connecting the heel and the forefoot in the sole. The shoe shank determines whether the shoes are stable on the feet. It not only needs to have enough strength and rigidity to support the appearance of the leather shoes, but also needs a certain flexibility to meet the comfort of wearing. The shank is too soft, the heel will be forward/backward or left/right skewed when walking, making the overall shape of the shoes very ugly, wearing unstable, lame, long time, will make the waist, legs and feet I feel tired. If the steel shanks are too hard, it will cause uncomfortableness. In the case of instability of gait, the heel is easily broken by external impact. When wearing it, it feels slippery underfooting and fits the feet imperfectly, and may even cause injury. In a word, the safety of shoes depends on the quality of steel shanks. For the quality of steel hooked heart, the relevant testing standards have been introduced in China, GB/T 28011-2011 "Steel shanks of shoes" standard. Although the mandatory standard has been changed to recommendation standard, its role in improving the safety of shoes still exists. Technical Requirements for Main Projects of Steel Hooked Heart of Footwear. The quality of GB/T 28011-2011 "Steel Shanks of Footwear" is divided into external quality and internal quality. External quality includes sign, appearance, length, width and thickness. The internal quality includes longitudinal stiffness, fatigue resistance, hardness and bending performance, among which longitudinal stiffness, fatigue resistance, hardness and bending performance are important safety indicators. How to know if the steel shanks is up to standard? Please choose GESTER Footwear Testing Equipments to test for your steel shanks or other shoes prodcuts. 1, Steel shanks hardness test - Automatic Digital Rockwell Hardness Tester GT-HRS...

December 24-25, 2018, all members of GESTER went to the Putian Jiulong Valley National Forest Park in Fujian Province for a two-day expansion training. This expansion training aims to train the team, enhance trust, promote team communication, enhance teamwork. It also encourages everyone to take responsibility, trust each other, challenge themselves. This expansion training helped to enhance the team's desire to advance and cohesiveness, and helped to create a united, passionate, excellent business team with strength and ability. After arriving in the Jiulong Valley, we first randomly divided into four teams (Commando team, Nine Dragons Team, Musou Team, Invincible Team), and each team elected a captain to facilitate the organization of the event. With the active participation of each team, 4 teams have successfully completed and show the design of the team name, team call and team logo within the specified time, and also have promised their own punishment once lost the game. On the first day of the event, four teams participated in the four training programs:Take water from a limited area; Build a device with some tubes to blow the balloon;Move the tower with puzzle; Have all members cross a small window.Each team completed the training well and shared their feelings of success and failure in training. The training also helped the team to fully understand the management awareness of team trust, effective communication, rational organization, leadership, execution and teamwork. In the "Life and Death Grid" game, there is a net made by ropes hanging between two trees, and there is only one small grid on the net. Everyone is required to go through the grid one by one, and no part of the body (including hair, clothes) can touch the net, otherwise it will cause "electric shock." As long as one person cause "electric shock", the whole team fails, and those who passed previously must return. This is a very tough and difficult game and one of the most educational projects. At first everyone was eager to try, but the facts found that individuals alone could not pass. Under the arrangement of the captain, we tried to help few members cross first. The process was very difficult, several times of the "electric shock" happened and we had to restart again and again. With effective teamwork and patience, some members had crossed the grid without “electric shock". With their help in other side of the grid, more and more members had crossed and we finally finished the game.  Although we won the game as a team, the work of every member was important and they were responsible for the results and the final performance. Mistakes in any member can lead to “electric shock” and lead the team to failure. When we were helping member crossing the grid, each one should pay attention to the actions of other members and be kindly reminded once they were making mistake. Through this activity, we realized that the details determine success or failure. The success of one m...

We received an email in December from the customer who wanted to visit us. The customer is AFRICAN BAMBOO from Ethiopia. In December 26, 2018.We picked up Dominique and Nils at 9:00 am and go to the office to discuss the required machine.The customer said our products are abundant and varied.An hour later, we go to the factory, visited the GT-C52 Temperature and Humidity Chamber, GT-K01 Universal Testing Machine (Dual Column), GT-D10 Drying Oven and other machines.Customers are most interested in the tension machine. And the sample has been brought and they informed us of the standard they need to do.After the technician confirmed, we can do these and need to customize grips. In lunch time, Dominique and Nils expressed that was satisfied with this visiting.Looked forward to the next visit. GESTER believe that the quality is the soul of an enterprise,therefore,we always put quality as the first consideration.

Denim clothes is favored by consumers due to its casual, washable and wear-resistant features, and has become the only clothing product that has been popular for more than 100 years except suits. But jean also has a disadvantage that is poor color fastness. The quality is a little bit worse and jeans often wash and fade like this. Today, GESTER will show you how to test the fastness of denim clothes to soap washing and how to prevent them from fading. Test the color fastness of denim clothing to soap washing Standard: ISO105 water color fastness test Instrument: Washing color fastness tester, steel ball (diameter 6mm), color matching cabinet Reagent : (1) Soap: moisture content not more than 5%. According to the dry mass, it should meet the following requirements: free alkali (Na2CO3) 0.3%; Free base (NaOH) 0.1%; Total fat content 850g/kg;Iodine value 50; No fluorescent whitening agent. (2)Anhydrous sodium carbonate (analytically pure). (3)Soap:① methods of A 40 ℃, 5 g/L liquid soap; ②methods of C 60 ℃, 5 g/L liquid soap to add 2 g/L anhydrous sodium carbonate mixture. Sample: 4 *10 cm cowboy sample Standard: a standard single fiber affixed lining or affixed lining Test steps: according to the sample ISO105 textile color fastness test with one or two pieces of affixed lining fabric stitch together. Then put it into the soap. At the prescribed time and temperature. The first wash, rinse thoroughly and dry, with grey sample card to evaluate the sample color and lining fabric color. Cut the sample into 4cm x 10cm according to the standard and sew on the lining. Place the sewn sample and washing solution in a stainless steel container and wash for 30min. After washing and drying, use the color assessment cabinet for grading. GESTER is a leading and outstanding company that manufactures and supplies all kinds of textile testing equipment.Our machines comply with ISO, ASTM, AATCC, BS, EN, DIN, JIS and other requirements.With the development of economic globalization, only strict control of textile quality can make enterprises stand out from the market competition.We strive to exceed customer expectations and constantly develop new technologies.

On a business trip, it is essential to travel with a suitable suitcase. But when you want to buy a good suitcase, you will find that there are a variety of suitcases in the world, dazzling and dazzling. There are three categories for the classification of travel bags according to the standard. 1. According to the variety is divided into: (1) travel hard box; (2) travel soft box; (3) travel bag 2. According to the material, it is divided into: (1) leather as the surface layer material; (2) artificial leather/synthetic leather as the surface layer material; (3) recycled leather as the surface layer material; (4) fabric as the surface layer material (5) Metal as the surface layer material (6) Plastic as the surface layer material (7) Using a variety of fabrics as the surface layer material (mixed fabric material) (8) Other surface layer materials Other materials Travel bags 3. According to the type: (1) vertical (2) horizontal Not only the categories, but also the size, style, function, etc. You have to consider, is it tired? In the end, maybe you want a durable suitcase, so what kind of suitcase is durable? A durable suitcase is sure to withstand the long-term test of its unevenness. There is an effective test standard to test the travel performance of the travel bag. It is the luggage walking test method. Luggage walking test method. It has two test methods, the test principle is: Method A: Load the specified load in the sample, and use the friction between the test roller of the roller walking test machine and the sample wheel to collide with each other, impact shock and wear on the sample, and simulate the use of the bag when walking. The condition is used for continuous walking test to test the quality of the sample wheel, axle, wheel frame, tie rod and box, and calculate the wear amount of the wheel. Method B: loading an appropriate amount of load in the sample, using the belt of the conveyor belt type walking test machine to travel the abrasive cloth, the test bump and the sample wheel between the friction and impact of each other, impact shock and wear on the sample, simulation luggage The running condition during walking is used for continuous walking test, and the sample walking wheel, axle, wheel frame, tie rod and box body are inspected, and the wear amount of the wheel is calculated. These two methods are to simulate the use of luggage when walking for continuous walking test. All in all, under certain conditions, the longer a suitcase can “walk” continuously on uneven roads, and the appearance of the suitcase is not abnormal, the smaller the wear of the wheel, the stronger its durability. The above test can be tested using a GESTER Luggage Caster Mileage Tester.GESTER Instrument Equipment Co., Ltd. is a high-tech enterprise engaged in the research and development and production of high-precision physical testing instruments. It provides integrated laboratory testing solutions for children's products, textiles, shoes, furniture, bags an...

The zipper fatigue tester is used for the reciprocating testing of various zippers by continuously testing back and forth. It aims to test the distance between zippers, loose or connector failure, nap, wear, etc. The zipper fatigue testing machine was used to test the zipper's load pulling. Its principle is the tester of zipper under the action of transverse and longitudinal tension.To test if the zipper can bear the specified number of reciprocating pulling operations. During the test.The zipper's puller is driven at the programmable speed for 30 movements per minute up to the specified number of times.The reciprocating stroke is 75mm; The width of the transverse clamping device is 25mm, the total weight of the longitudinal clamping device is 0.28 ~ 0.34kg, and the distance between the two clamping devices is 6.35mm. Standard： CNS -1083 , BS 3084 , QB/T2171 Application： This test method is suitable for all kinds of zippers. Conditions： Room temperature(23±2℃) Size of sample： One zipper(length≥200mm) Parameter requirements：   1. Speed：30times/min   2. Stroke：75mm   3. Angel of opening and closing：Opening 30°;Closing 60°; Zipper Fatigue Tester Procedure：   1. Switch on the power.Adjust the knob so that the tension clamp device is at a lower position, at the same time the lower indicator light is on.   2. Select the appropriate thickness of the positioning plate to be fixed on the zipper pull head, and fix the zipper pull head under the pressure plate to lock and fix. 3.Firstly fixed the end of zipper(lower end) at point A of the upper clip. Then fixed the head of zipper at two longitudinal clip points D and E. of the upper clip   4. Loosen the upper pincer slightly, pull the end of the zipper upward to make the vertical clamping device G horizontal line parallel to the horizontal plate, then lock the upper pincer A.   5. Loosen the two transverse clips B and C, let the cloth tape at both sides of the zipper fit into B and C fixtures, clamping, and the clamping port is about 5mm from the tooth foot.   6. Adjust the tension of Adjust the tension of the longitudinal and lateral spring balance separately according to the standard.   7. Setting the test times and press the start button to start test。   8. Remove the sample after the number of arrival stops automatically.Observe the degree of sample damage.

Casters testing of Office chair Only High quality swivel chair can withstand three test QB/T2280-2016 Abrasion and Fatigue Test—Standard QB/T2280-2016 Under the load of 113kg, record a reciprocating cycle as one time and do reciprocating motion of the stroke.at least 762mm. whole course of one reciprocating cycle motion for 762mm stroke is more than 1.5m. The test of crossed obstacles for two thousand times and doing reciprocating cycles 98,000 times under obstacle-free conditions, totally 100,000 times for reciprocating motion of 762mm stroke, are equivalent to carrying 113kg of heavy objects and trudged more than 150 kilometers, but five casters of chair without any damage! Impact Test-Standard QB/T2280-2016 Adjust the caster to the most vulnerable state and throwing 120kg sandbag to seat surface from the height of 152mm for 2 times. Then reduce the impact weight to 57kg, impact height to 30mm,repeated impact for 100,000 times. The casters are still very strong under 100,000 times impact test! Drop Test-Standard QB/T2280-2016 Lift the chair to a height of 200mm, the angle between the chair legs and the ground is 10±2°, then doing free fall for 10 times but the leg of the chair must not have any damage or defects for using. GESTER offers a number of furniture testing equipment to perform safety tests for office furniture, mattresses, suitcases as well as indoor/outdoor desks and chairs, thus evaluating their stability, durability, tensile strength, drop resistance, impact resistance, mechanical structure and other properties.