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  • How to test the mutual color fastness of textile splicing

    How to test the mutual color fastness of textile splicing

    17 Aug, 2022

    Clothes stained during washing or soaking? I believe that everyone is familiar with this situation, and many people should have encountered such embarrassing things. This is due to the mixed washing of dark and light-colored clothes, the fading of dark-colored clothes and dyeing on light-colored clothes, resulting in staining of light-colored clothes, or the mutual staining of dark and light colors on a piece of clothing after washing. In response to this phenomenon, there is a professional name in textiles: splicing and mutual dyeing. Test methods for testing the interdyeing of textiles by splicing, namely the washing method and the soaking method. The washing method The sample is placed in the specified washing solution, mechanically stirred according to the specified bath ratio, time and temperature, then washed and dried, and the staining of the light-colored sample is evaluated with a staining gray card or an instrument. The soaking method The sample is placed in the specified washing solution, and after treatment, it is placed between two flat plates with a specified pressure in the test device. After cleaning and drying, the staining of the light-colored sample is evaluated with Gray scale for color staining or an instrument. Sample preparation: 1. The sample is a ready-made garment. Cut a piece of dark and light-colored fabrics, 4×10cm, and sew them along the short side to form a combined sample. 2. Weigh the sample to the nearest 0.01g. 3. Add detergent according to the sample weight. The sampling and soap solution configuration of the two methods are the same, the only difference is the test equipment and operating procedures. Test Instruments The washing method: Wash Colour Fastness Tester The soaking method: Precision Drying Oven Operating procedure The washing method 1. Put the sample and test solution into the container 2. Put the container into the machine, set the temperature to 40 degrees, and test it for 30 minutes. 3. Take out the sample and rinse it with running water until it is clean. The soaking method 1. Put the sample and test solution into the container, press and move from time to time to completely soak the sample, take out the sample and place it on the Perspiration Tester, and apply a pressure of 5000g. 2. Put the loaded sample into the Precision Drying Oven, the temperature is 37 degrees, for 4 hours, take out the combined sample, and rinse it with running water until it is clean. The test temperature of the washing method is 3°C higher than that of the soaking method. In terms of test time, the washing method requires 30 minutes and the soaking method is 4H. After the test is completed, after rinsing the test, it is necessary to absorb excess water with filter paper and hang it to dry. The samples tested by the two methods are evaluated by Gray scale for color staining. From the test results, the stain level of the soaking method is much more serious than that of the washing method. Color Fastness Test Machines abo...

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  • Knowledge Sharing: Measures to Reduce Pilling

    Knowledge Sharing: Measures to Reduce Pilling

    31 Jul, 2022

    In the process of wearing and using fabrics, different degrees of pilling will occur. So how can we reduce the pilling of our fabrics? Spinning process During the spinning process, the fibers in the twisting triangle area undergo repeated internal and external transfer due to uneven force, causing the head end, tail end or middle part of most fibers to protrude from the yarn body, forming hairiness. In order to reduce the hairiness, the textile mill rationally mixes cotton, optimizes the process, adopts advanced textile technology according to its own conditions, and tries to control the occurrence of hairiness within the scope of its ability. Weaving process The organizational structure of knitted fabrics has a great influence on pilling, and the tight organization is less prone to pilling than the loose organization. Dyeing and finishing process Singeing: Singeing is a great way to reduce hairiness and reduce pilling. Adjustment of technical parameters: After the dyeing and finishing technology is determined, parameters such as bath ratio time can be adjusted appropriately, for example, the bath ratio can be appropriately increased or the technical curve can be improved to shorten the time. Use of auxiliaries: Anti-pilling agents can be added during the bleaching process. The softener is added during the dyeing process to reduce the mixed friction between the yarns and between the fabric and the dyeing machine, and at the same time, it can control the leakage of the fibers from the end of the yarn, thereby reducing the chance of pilling. Hairiness appressing method: The hairiness appressing method is to use mechanical and physical and chemical methods to make the hairiness tightly adhere to the surface of the fabric, so as to reduce feathers and reduce pilling. Specifically, the use of resin auxiliaries or chemical adhesives, through rolling, makes the hairiness lodged and fixed on the surface of the yarn. Through the above methods, the pilling can be improved to a certain extent. Reducing pilling is a systematic project, and it is recommended to take comprehensive measures in the production process of fiber production, spinning, weaving, dyeing and finishing. AVENO related Abrasion and pilling tester: Please click: Abrasion and pilling tester Contact Us Now! Sales Dept Tel: +86 15280858852 Email: sales@avenotester.com Skype: sales@avenotester.com Web: www.avenotester.com

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  • Daily maintenance of laboratory equipment

    Daily maintenance of laboratory equipment

    13 May, 2022

    In order to the accuracy of experimental data and the normal operation of experimental instruments, the daily maintenance of laboratory instruments is of great significance. The laboratory should formulate a reasonable maintenance plan according to the use conditions of different instruments. A reasonable maintenance plan can improve the accuracy and functionality of laboratory testing equipment, reduce the failure rate, improve the use rate and prolong the service life of equipment. Laboratory equipment managers should be familiar with the working principle of each instrument and understand the functionality and working mode of each component of each instrument and equipment, so as to formulate maintenance contents for the functional components of the instrument. Generally, the common maintenance contents are as follows: 1. Check the appearance and operation of functional components 2. Cleaning 3. Add lubricating oil, antirust oil, etc 4. Replace consumables / accessories General principles for selecting maintenance intervals and times Equipment maintenance is aimed at all the instruments in the laboratory: 1. Determine the frequency of the cycle according to the working principle of the instrument and the frequency of use; 2. Appropriately relax or shorten the maintenance cycle according to the harsh environment of the equipment; 3. Cooperate with the equipment period inspection. Generally speaking, equipment maintenance should be arranged before each equipment period inspection to ensure that the equipment is in the best condition during the period inspection. The routine maintenance of general equipment can be controlled at about twice a year. Under special circumstances or special equipment, flexible maintenance shall be carried out according to the specific actual situation: 1. The equipment with periodic replacement of consumables shall flexibly grasp the cycle according to the specific replacement cycle; 2. For the equipment working in the unavoidable harsh environment, the maintenance times shall be appropriately increased according to the actual situation without affecting the test; 3. It is recommended to arrange a maintenance before the equipment is checked during the period; 4. For equipment with high frequency of use, the number of maintenance shall be appropriately increased. Routine maintenance of common laboratory testing instruments 1. ICI Pilling and Snagging Tester Regularly wipe the surface of the cork liner with a trace amount of methanol, clean the roller box before and after the test, check whether the cork liner falls off and whether there are sharp objects on the surface, and regularly clean the exposed parts of the rotating shaft and bearings to prevent fiber residues and yarn residues. On the bearing, the rotation of the roller box is stuck and the rotation speed is abnormal. After confirming that there is no residue on the rotating shaft and the bearing, add lubricating oil. More about AVENO AG05 ICI Pilling and Snagg...

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  • Yarn twist knowledge

    Yarn twist knowledge

    17 Jan, 2022

    Yarn: it is the general term of yarn and thread. And has a strong continuous strip, including single yarns and strands. Single yarn: Processed by the short fibers, making the short fibers or wires along the axial direction and twisted. Ply yarn: it is made of two or more single yarns combined and twisted. Its strength and wear resistance are better than that of single yarn. At the same time, ply yarn can also be combined and twisted in a certain way to obtain compound twisted ply yarn. What is twisting? If one end of the strip is held, the other end is rotated, and the yarn can be formed, which is called twisted. For short fibers, the twisted is the necessary means of making the fiber strip as a yarn. It is generally necessary to condense the fibers into a fibrous strip before twisting, and the outer fibers of the fibers are extruded into the inner layer. Thereby, the strip is obtained in the longitudinal direction of the fibers. For long silk yarns and strands, twisted can form a tight structure that is not easily damaged by lateral force, and twisting can also form a variant wire and a fancy line. How many of the twisted and twisted direction not only affect the hand feel and appearance of the fabric, but also affect the intrinsic quality of the fabric. After the strip is twisted, the outer fibers produce a tilted helical roll back, the fiber torsional deformation, the gauze is tightly bored, and the structural form and mechanical physical properties of the fiber collective are changed. (As shown below) When there is an encirclement angle, the fiber has centripetal pressure on the yarn. The greater the encirclement angle, the greater the centripetal pressure. Due to the existence of centripetal pressure, the outer fiber is extruded to the inner layer, which increases the compactness of the yarn and the friction between the fibers, thus changing the structural form and physical and mechanical properties of the yarn, which is the essence of twisting yarn. Evaluation of yarn twist: Twist direction / twist / twist coefficient / twist shrinkage Twist direction: indicates the direction of twisting Twist direction refers to the inclined direction of the fiber in the single yarn or the single yarn in the strand after the yarn is twisted. It is divided into Z-twist and S-twist. After twisting, the twisting direction of yarn tends from the lower right corner to the upper left corner, and the inclined direction is consistent with the middle of "s", which is called s twisting or smooth twisting; The twist direction of yarn tends from the lower left corner to the upper right corner, and the tilt direction is consistent with the middle of "Z", which is called Z twist or backhand twist. Generally, Z-twist is used for single yarn and S-twist is used for ply yarn. The twist direction of the ply yarn is expressed according to the twist direction successively twisted. For example, the twist direction of single yarn with Z twist, initial twist with S twist and com...

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  • Test method for Pilling Resistance of fabrics

    Test method for Pilling Resistance of fabrics

    07 Jan, 2022

    Rationally and objectively evaluate the resistance of the fabric to promote the development and production of textiles to actively promote the role. There are many test methods for Pilling Resistance of fabrics, mainly simulated during daily life and actual wear and washing process, due to continuous friction, Thus, the phenomenon of the surface of the fabric appears, and thus the test method is designed. different target markets have different tests. Methods, such as US standards, European standards, China Standards, and customer standards, usually select appropriate test methods based on export, product types or buyers. The commonly used methods include ICI Pilling Box method, Martindale Pilling method, Random Tumble method, Elastic gasket method, Circular Locus Pilling method.It should be noted that the pilling test is not only limited to the above test. and now there are many customer requirements to rating directly through the hairpin of the fabric after washing, and the customer chooses to use the post-washing sample. Various pilling test methods to assess the resistance of the fabric against the promoting pilling performance. ICI Pilling Box method The test principle is three pieces of square samples that are sized by a square specimen of sizes from the weft to the weft, each of which are sewn into a tubular shape, and the front faces are separately set on the polyurethane moisture tube. Within a cork box, the test chamber is flipped by the number of 3600 revolutions per hour, and the sample is taken out in the rating box and the fabric is compared to the fabric, and the first level is the worst. The 5th is best, when the result is between the two adjacent two levels, I evaluate half. Common test standards include ISO 12945-1, GB / T 4802.3, IWS TM 152. This method mainly simulates the fabric itself with its own uninterrupted friction, and the fans of the fabric and other pharmaceutically fangs. This test method can be applied to all types of fabrics, but the main domestic market or export to the European market is using this method to test the pilling performance. AVENO related products: AG05 ICI Pilling and Snagging Tester Martindale Pilling method The test principle is to take three pairs of circular samples from the fabric, which are loaded in the upper and lower clamping devices. Under the slight pressure, the sample itself rubs each other, and rubbed by the Lissajous, after a certain number of revolutions, Samples are compared with the original or standard samples of the rating box, and the the worst level 1, level 5 is the best, and when the results are interposed between two adjacent two levels, it can be evaluated as half level. This method is applicable to all types of fabrics, but it is more applied to woven fabrics. It mainly simulates the pilling condition after frequent friction between fabrics. AVENO related products: AG04 Martindale Abrasion and Pilling Tester Random Tumble method The experimental principle is to take ...

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  • Calibration procedure Of ROSS Flexing Tester

    Calibration procedure Of ROSS Flexing Tester

    17 Nov, 2021

    1. Calibration items: angle (90°), speed (60~100±5 times/min) 2. Correction equipment: angle gauge, electronic stopwatch 3. Calibration period: one year 4. Calibration steps: a) Angle correction method of Ross Flex Resistance Testing Machine: i. First adjust the machine in a horizontal state. ii. Turn the motor belt by hand or press the STOP and START keys to adjust the horizontal position of the movable end fixture, place the angle gauge on the movable fixture, and the angle gauge indication should be 0°. Continue to rotate the belt or press the STOP and START keys to move the maximum swing angle of the end fixture is 90° to observe whether it matches the value indicated by the angle gauge. b) Speed correction method of SATRA TM60 Ross Flex Tester: i. Start the POWER button on the control panel, reset the "PV" column to zero, and set the number of times in the "SV" column (the number of times that the correction speed is exceeded). ii. Press the START button to start the machine, and at the same time let the electronic stopwatch start timing. iii. When the electronic stopwatch reaches 1 minute to stop timing, press the STOP machine to stop at the same time, and observe whether the 1 minute time is consistent with the standard speed. More about ROSS Flexing Tester please click: https://www.avenotester.com/ross-flexing-tester-af23_p88.html Contact Us Now! Sales Dept Tel: +86 15280858852 Email: sales@avenotester.com Skype: sales@avenotester.com Web: www.avenotester.com

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  • Device installation of Fabric Appearance Assessment System

    Device installation of Fabric Appearance Assessment System

    04 Oct, 2021

    1. Install two uprights Locate the Fabric Appearance Meassure Board base and two uprights, and lock the screws on both sides of the base. 2. Install the lamp holder Locate the top frame with the lamp holder, and lock the screws on both sides. 3. Installation panel Locate the panel against the top of the Fabric Appearance Meassure Board, align the holes on both sides, and insert the screws. 4. Install the panel support rod Find two corresponding holes on the two uprights of the instrument frame, and install the sample support frame. More about Fabric Appearance Assessment System please click: https://www.avenotester.com/fabric-appearance-assessment-system-ag47_p261.html Contact Us Now! Sales Dept Tel: +86 15280858852 Email: sales@avenotester.com Skype: sales@avenotester.com Web: www.avenotester.com

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  • Commonly used fiber names and abbreviations for chemical fiber filaments must be collected!

    Commonly used fiber names and abbreviations for chemical fiber filaments must be collected!

    01 May, 2021

    There are many abbreviations of names in textile fabrics. The following are commonly used fiber names and chemical fiber filament abbreviations, which can be collected and used: Main varieties of chemical fiber PTT Polytrimethylene terephthalate fiber Elastic polyester PET Polyethylene terephthalate fiber Polyester fiber (also expressed as PES) PBT Polybutylene terephthalate fiber PA Polyamide fiber nylon (nylon) PAN Polyacrylonitrile fiber acrylic artificial wool PE Polyethylene fiber PVA Polyvinyl Alcohol Fiber Vinylon (also expressed as PVAL) PP Polypropylene fiber polypropylene fiber PVDC Polyvinylidene chloride PVC Polyvinyl chloride fiber, chlorinated fiber (also expressed as CLF) PU Polyurethane fiber spandex (also indicated by EL) PTFE Polytetrafluoroethylene fiber fluorine fiber PI Polyimide fiber CF Carbon fiber (commonly known as graphite fiber) R Viscose fiber A Acetate fiber Chemical fiber long and short yarn name F Filament S Short wire M Monofilament UDY Undrawn yarn LOY Low speed spinning MOY Medium speed spinning POY High-speed spinning, pre-oriented yarn HOY Super High Speed Spinning FOY Fully oriented yarn FDY Full stretch yarn (spinning one-step spinning) USY Ultra high speed spinning SDY Spinning (silk) drawing (stretching) silk DY Stretched yarn TY Textured wire DW Stretched winding yarn ATY Air textured yarn DTY Stretch textured yarn SDTY Spinning drawn textured yarn BCF Bulked (deformed) filament HDIY Heavy denier industrial yarn LDIY Light denier industrial yarn NOY (NSY) Free sizing HWM High wet modulus fiber WD Stretch warping (warp beam) WDS Stretch warping sizing (warp beam) PLA Polylactate fiber (corn starch fiber) Links to AVENO textile testing equipment: https://www.avenotester.com/textile-test-equipment_c1 Contact Us Now! Sales Dept Tel: +86 15280858852 Email: sales@avenotester.com Skype: sales@avenotester.com Web: www.avenotester.com

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  • Common problems and cause analysis of color fastness to rubbing

    Common problems and cause analysis of color fastness to rubbing

    12 Apr, 2021

    The color fastness to rubbing is the most basic evaluation index for the color fastness of textile products. The main problems of SME products in terms of color fastness to rubbing are: 1. The color fastness to wet rubbing of medium and dark cotton, linen and their blended products is mostly below 2-3, which is lower than the requirements of general standards. 2. The color fastness to dry rubbing of some dark, thin and fuzzing products containing wool is much lower than that of wet rubbing. 3. The color fastness to dry rubbing of some rough or raised fabrics, including paint dyeing and printing products, does not meet the minimum requirements of the standard. 1.1 Color fastness to wet rubbing Direct dyes are used for the dyeing of cellulose fibers, and the color fastness to wet rubbing and the color fastness to washing are not ideal. Causes: The affinity of direct dyes to cellulose is mainly based on dipole attraction and dispersion. The combination of this adsorption is not strong, especially in the wet state, the hydrogen bond may be stronger. Insoluble azo dyes dye cellulose fiber products, and their color fastness to rubbing is not ideal. Causes: Factors Affecting the Color Fastness of Reactive Dyes to Wet Rubbing 1. The structure and characteristics of reactive dyes themselves 2. The properties of cellulose fabrics 3. Pre-treatment effect, cloth surface damage and smooth surface 4. Dyeing process and the effect of soaping after dyeing 5. The effect of fixing treatment after dyeing the fabric 6. The effect of dyeing fabric finishing and the effect of cellulose fiber degradation Fiber fabrics dyed with reactive dyes will cause color transfer in the wet rubbing fastness test. major factor: The water-soluble dye fades the original color and stains the rubbing cloth during rubbing. Part of the dyed fiber breaks when rubbed, forming tiny colored fiber particles, causing staining. The color fastness to wet rubbing of fabrics dyed with reactive dyes is closely related to the depth of dyeing. Among them, the supersaturation of the dye is the most important factor. How to effectively improve the color fastness to wet rubbing of fabrics? Proper pre-treatment of cellulose fiber before dyeing, such as mercerizing, singeing, cellulase finishing, desizing and scouring, bleaching, washing, and drying, can improve the surface finish and hair effect of the fabric, and reduce friction resistance. , Reduce floating color. 1.2 Color fastness to dry rubbing: Some specific fabrics (lightweight fabrics, rough surface or sanded fabrics, raised fabrics) do not meet the standard requirements. Lightweight fabrics fail to meet the requirements for dry friction resistance. Causes: Because the fabric structure is relatively loose, during dry friction, the sample will partly slip with the movement of the friction head under the action of pressure and friction, which increases the friction resistance and improves the friction efficiency. The color fastness to dry rubbing of...

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latest news

How to test the mutual color fastness of textile splicing
How to test the mutual color fastness of textile splicingAug 17, 2022

How to test the mutual color fastness of textile splicing

Clothes stained during washing or soaking? I believe that everyone is familiar with this situation, and many people should have encountered such embarrassing things. This is due to the mixed washing of dark and light-colored clothes, the fading of dark-colored clothes and dyeing on light-colored clothes, resulting in staining of light-colored clothes, or the mutual staining of dark and light colors on a piece of clothing after washing. In response to this phenomenon, there is a professional name in textiles: splicing and mutual dyeing. Test methods for testing the interdyeing of textiles by splicing, namely the washing method and the soaking method. The washing method The sample is placed in the specified washing solution, mechanically stirred according to the specified bath ratio, time and temperature, then washed and dried, and the staining of the light-colored sample is evaluated with a staining gray card or an instrument. The soaking method The sample is placed in the specified washing solution, and after treatment, it is placed between two flat plates with a specified pressure in the test device. After cleaning and drying, the staining of the light-colored sample is evaluated with Gray scale for color staining or an instrument. Sample preparation: 1. The sample is a ready-made garment. Cut a piece of dark and light-colored fabrics, 4×10cm, and sew them along the short side to form a combined sample. 2. Weigh the sample to the nearest 0.01g. 3. Add detergent according to the sample weight. The sampling and soap solution configuration of the two methods are the same, the only difference is the test equipment and operating procedures. Test Instruments The washing method: Wash Colour Fastness Tester The soaking method: Precision Drying Oven Operating procedure The washing method 1. Put the sample and test solution into the container 2. Put the container into the machine, set the temperature to 40 degrees, and test it for 30 minutes. 3. Take out the sample and rinse it with running water until it is clean. The soaking method 1. Put the sample and test solution into the container, press and move from time to time to completely soak the sample, take out the sample and place it on the Perspiration Tester, and apply a pressure of 5000g. 2. Put the loaded sample into the Precision Drying Oven, the temperature is 37 degrees, for 4 hours, take out the combined sample, and rinse it with running water until it is clean. The test temperature of the washing method is 3°C higher than that of the soaking method. In terms of test time, the washing method requires 30 minutes and the soaking method is 4H. After the test is completed, after rinsing the test, it is necessary to absorb excess water with filter paper and hang it to dry. The samples tested by the two methods are evaluated by Gray scale for color staining. From the test results, the stain level of the soaking method is much more serious than that of the washing method. Color Fastness Test Machines abo...

Knowledge Sharing: Measures to Reduce Pilling
Knowledge Sharing: Measures to Reduce PillingJul 31, 2022

Knowledge Sharing: Measures to Reduce Pilling

In the process of wearing and using fabrics, different degrees of pilling will occur. So how can we reduce the pilling of our fabrics? Spinning process During the spinning process, the fibers in the twisting triangle area undergo repeated internal and external transfer due to uneven force, causing the head end, tail end or middle part of most fibers to protrude from the yarn body, forming hairiness. In order to reduce the hairiness, the textile mill rationally mixes cotton, optimizes the process, adopts advanced textile technology according to its own conditions, and tries to control the occurrence of hairiness within the scope of its ability. Weaving process The organizational structure of knitted fabrics has a great influence on pilling, and the tight organization is less prone to pilling than the loose organization. Dyeing and finishing process Singeing: Singeing is a great way to reduce hairiness and reduce pilling. Adjustment of technical parameters: After the dyeing and finishing technology is determined, parameters such as bath ratio time can be adjusted appropriately, for example, the bath ratio can be appropriately increased or the technical curve can be improved to shorten the time. Use of auxiliaries: Anti-pilling agents can be added during the bleaching process. The softener is added during the dyeing process to reduce the mixed friction between the yarns and between the fabric and the dyeing machine, and at the same time, it can control the leakage of the fibers from the end of the yarn, thereby reducing the chance of pilling. Hairiness appressing method: The hairiness appressing method is to use mechanical and physical and chemical methods to make the hairiness tightly adhere to the surface of the fabric, so as to reduce feathers and reduce pilling. Specifically, the use of resin auxiliaries or chemical adhesives, through rolling, makes the hairiness lodged and fixed on the surface of the yarn. Through the above methods, the pilling can be improved to a certain extent. Reducing pilling is a systematic project, and it is recommended to take comprehensive measures in the production process of fiber production, spinning, weaving, dyeing and finishing. AVENO related Abrasion and pilling tester: Please click: Abrasion and pilling tester Contact Us Now! Sales Dept Tel: +86 15280858852 Email: sales@avenotester.com Skype: sales@avenotester.com Web: www.avenotester.com

Operation specification of Laboratory Wringer
Operation specification of Laboratory WringerJul 26, 2022

Operation specification of Laboratory Wringer

Laboratory Wringer suitable for testing the liquid content of small cloth samples in the textile printing and dyeing and finishing process in the laboratory. 1. Operation steps of Laboratory Padder: 1) Items to be confirmed before operation: Confirm whether the power supply meets the requirements. Whether the water collecting tray is installed and whether the internal residual liquid is poured out. Whether the Lab Wringer (Padder) is stable. 2. Plug in the power plug and connect the power supply. 3. Install a weight of appropriate weight on the weight base. 4. Press the start button to start the Lab Wringer (Padder), and the drum starts to rotate. 5. Place one end of the sample flat at the joint of the two rollers. 6. The roller drives the sample to rotate backward, and at the same time, it removes excess water. 7. After the end of the sample is removed from the rear of the drum, grasp the end of the sample and move with the sample. 8. Take the sample after the sample comes out completely from the rear. 9. Press the stop button to turn off the power and remove the water collected in the water collecting pan. AVENO Machine Recommend: AC31 Laboratory Wringer Contact Us Now! Sales Dept Tel: +86 15280858852 Email: sales@avenotester.com Skype: sales@avenotester.com Web: www.avenotester.com

Classification of woven fabrics
Classification of woven fabricsJun 17, 2022

Classification of woven fabrics

Fabrics are products made of yarn (thread) or fiber, mainly including woven fabrics, knitted fabrics and nonwoven fabrics. Woven fabrics are products made of two groups of mutually perpendicular yarns (threads) interwoven on the loom, such as common plain cloth, gabardine, khaki, satin, etc. The yarn arranged along the length of the fabric is called warp, and the yarn arranged along the width of the fabric is called weft. By changing the raw materials, thickness and organizational structure of the yarn or using different colored yarns to cooperate with each other, different warp and weft yarns are interwoven with each other, and fabrics of different styles and uses can be woven. These fabrics can be divided into clothing fabrics, decorative fabrics and industrial fabrics. A. Classification of woven fabrics for clothing Woven fabrics for clothing are usually classified according to whether the raw material yarn is dyed or not, fabric pattern and width. 1. According to the type of raw materials (1) Pure textile fabrics: The warp and weft yarns are all fabrics made of the same fiber raw material, such as cotton fabrics, linen fabrics, wool fabrics, silk fabrics, etc. (2) Blended fabric: warp and weft yarns are fabrics made of yarns mixed with two or more fibers, such as polyester / cotton fabrics, wool / polyester fabrics, polyester / linen fabrics, wool / polyester / nitrile fabrics and medium length fabrics. (3) Interwoven fabrics: fabrics made of different raw material yarns for warp and weft, such as silk-wool interlacing, cotton and viscose filament interlacing, silk and viscose filament interlacing and other interwoven fabrics. (4) Interlaced fabric: The warp and weft yarns are woven from two or more different raw materials combined with synthetic strands. 2. Classification according to whether the yarn is dyed or not (1) Natural color fabric: the yarn is processed into fabric without bleaching and dyeing, which is directly sold or processed into finished products after dyeing and printing. (2) Yarn dyed fabric: a fabric made of bleached and dyed yarn. 3. Classification by fabric pattern (1) Plain fabrics: fabrics without patterns, such as various plain fabrics, twill fabrics, satin fabrics, etc. (2) Small patterned fabric: the pattern fabric with small area is formed on the fabric through the change of fabric structure, such as various tweeds. (3) Jacquard fabrics: fabrics with a wide range of patterns formed by controlling a single warp, such as floral satin. 4. According to the width of fabric, it can be divided into wide fabric, narrow fabric and belt fabric. B. Classification of decorative woven fabrics Decorative fabrics are available in a wide variety, usually divided by application. (1) Bedding: such as quilt cover, quilt cover, bed sheet, towel quilt, pillow towel, etc. (2) Furniture cloth: such as sofa cover, chair cover, etc. (3) Indoor articles: such as curtain cloth, wall covering, carpet, curtain fabric, etc. (4) Dining room and ...

Installation place requirements of UV Accelerated Weathering Tester
Installation place requirements of UV Accelerated Weathering TesterMay 27, 2022

Installation place requirements of UV Accelerated Weathering Tester

In order to facilitate the heat dissipation and maintenance of the cabinet, the place where the UV Accelerated Weathering Tester is installed must meet the following conditions. 1. Keep enough maintenance space between the UV testing equipment and adjacent walls or other equipment after installation; 2.In order to stably play the function and performance of the test equipment, the place where the annual temperature is 15 °C ~ 28 °C and the relative humidity is not more than 85% should be selected; 3. The ambient temperature of the installation site should not change drastically 4.It should be installed on a level ground (the level is determined on the ground when installed); 5. It should be installed in a place without direct sunlight 6.It should be installed in a well-ventilated place 7. It should be installed away from combustibles, explosives and high temperature heat sources 8.It should be installed in places with less dust 9. Install as close as possible to the power supply AVENO Machine Recommend: AG19 UV Accelerated Weathering Tester Contact Us Now! Sales Dept Tel: +86 15280858852 Email: sales@avenotester.com Skype: sales@avenotester.com Web: www.avenotester.com

Daily maintenance of laboratory equipment
Daily maintenance of laboratory equipmentMay 13, 2022

Daily maintenance of laboratory equipment

In order to the accuracy of experimental data and the normal operation of experimental instruments, the daily maintenance of laboratory instruments is of great significance. The laboratory should formulate a reasonable maintenance plan according to the use conditions of different instruments. A reasonable maintenance plan can improve the accuracy and functionality of laboratory testing equipment, reduce the failure rate, improve the use rate and prolong the service life of equipment. Laboratory equipment managers should be familiar with the working principle of each instrument and understand the functionality and working mode of each component of each instrument and equipment, so as to formulate maintenance contents for the functional components of the instrument. Generally, the common maintenance contents are as follows: 1. Check the appearance and operation of functional components 2. Cleaning 3. Add lubricating oil, antirust oil, etc 4. Replace consumables / accessories General principles for selecting maintenance intervals and times Equipment maintenance is aimed at all the instruments in the laboratory: 1. Determine the frequency of the cycle according to the working principle of the instrument and the frequency of use; 2. Appropriately relax or shorten the maintenance cycle according to the harsh environment of the equipment; 3. Cooperate with the equipment period inspection. Generally speaking, equipment maintenance should be arranged before each equipment period inspection to ensure that the equipment is in the best condition during the period inspection. The routine maintenance of general equipment can be controlled at about twice a year. Under special circumstances or special equipment, flexible maintenance shall be carried out according to the specific actual situation: 1. The equipment with periodic replacement of consumables shall flexibly grasp the cycle according to the specific replacement cycle; 2. For the equipment working in the unavoidable harsh environment, the maintenance times shall be appropriately increased according to the actual situation without affecting the test; 3. It is recommended to arrange a maintenance before the equipment is checked during the period; 4. For equipment with high frequency of use, the number of maintenance shall be appropriately increased. Routine maintenance of common laboratory testing instruments 1. ICI Pilling and Snagging Tester Regularly wipe the surface of the cork liner with a trace amount of methanol, clean the roller box before and after the test, check whether the cork liner falls off and whether there are sharp objects on the surface, and regularly clean the exposed parts of the rotating shaft and bearings to prevent fiber residues and yarn residues. On the bearing, the rotation of the roller box is stuck and the rotation speed is abnormal. After confirming that there is no residue on the rotating shaft and the bearing, add lubricating oil. More about AVENO AG05 ICI Pilling and Snagg...

 
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