CN115932226A - Testing device and testing method for bundling property of spandex fiber for sanitary material - Google Patents
Testing device and testing method for bundling property of spandex fiber for sanitary material Download PDFInfo
- Publication number
- CN115932226A CN115932226A CN202211560623.5A CN202211560623A CN115932226A CN 115932226 A CN115932226 A CN 115932226A CN 202211560623 A CN202211560623 A CN 202211560623A CN 115932226 A CN115932226 A CN 115932226A
- Authority
- CN
- China
- Prior art keywords
- spandex
- roller
- testing
- drafting
- yarn
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Landscapes
- Treatment Of Fiber Materials (AREA)
Abstract
The invention provides a testing device and a testing method for bundling property of spandex fibers for a sanitary material. The testing device comprises a spandex OETOT unwinding device, a yarn guide hook, a pre-drafting device, a friction device, an overfeed drafting device, image detection equipment and a yarn suction device; the pre-drafting device comprises a feeding roller and an output roller 1; the overfeed drafting device comprises an output roller 1 and an output roller 2. The stretched spandex yarn is rubbed with the concave friction wheel at a certain angle, a certain speed difference is set for the pre-drafting device and the overfeeding drafting device, and the branching and yarn breaking conditions on the surface of the spandex yarn are observed through image detection equipment, so that the bundling property of the spandex yarn is judged. Compared with a static bundling property test, the test method can better meet the actual friction condition of dynamic stretching movement of the spandex yarn in the production and weaving processes.
Description
Technical Field
The invention relates to a testing device and a testing method for fiber bundling property, in particular to a testing device and a testing method for spandex fiber bundling property for a sanitary material.
Background
Spandex fibers, known by the academic name "polyurethane fibers," are also known as "polyurethane elastic fibers. The denier of the spandex fiber for the sanitary material is generally more than 420D, the number of monofilament holes exceeds 40, and the cross section of the fiber mainly has a circular shape, an oval shape, a peanut shape and the like. The fibers are false twisted during the spinning process to enable the porous monofilaments to contact with each other, be adhered and finally be embraced into tows. In the subsequent physical detection, the strand needs to be evaluated for the indexes such as bundling property, stretchability, unwinding tension, creep property, solvent residual rate, oil content, boiling shrinkage rate, sanitary requirement and the like, and the indexes are used as the standard for determining whether the product is qualified.
The spandex fiber for the sanitary material is mainly suitable for paper diapers, pull-up pants, waist-surrounding pants and the like. With the change of consumption concept, the usage amount of paper diaper products is increased year by year, and the demand of using spandex fiber as an elastic material of sanitary products is increased. Because the performances of antibiosis, environmental protection and the like have special range requirements, the polymer formula, spinning production and weaving on a machine are all different from the common polyurethane fiber.
The prior spandex fiber for the sanitary material has some problems. The spandex filaments are not woven into the diaper, but drafted in a bare filament form by an OETOT unwinding method, and are directly bonded to the nonwoven fabric substrate by hot melt adhesive. The mutual adhesiveness of the bare wires and the hot melt adhesive directly influences the elasticity of the paper diaper. If the adhesiveness is good, the position of the spandex filament is fixed, and the stretching isotropy among a plurality of spandex filaments is good; if the adhesiveness is poor, the position of the spandex filament slides, the spandex filament is easily peeled from the non-woven fabric substrate, and the stretch elasticity is insufficient. Considering that the spandex filaments are easy to adhere to each other in the long-term package storage process to cause unsmooth unwinding, an oiling agent is coated on the surfaces of the spandex filaments in the processing process, and the oiling agent can weaken the viscosity of an adhesive, so that the using amount of the oiling agent needs to be limited in the production process of the spandex fibers for the sanitary materials.
Some spandex fiber manufacturers for sanitary materials can add lubricants to polymers to reduce unsmooth unwinding caused by the reduction of the amount of spandex oil, such as powder auxiliaries like magnesium stearate, magnesium palmitate, titanium oxide, cellulose esters and the like. The auxiliary agent is uniformly dispersed on the surface of the spandex filament to form hill-like 'particle points', so that the contact area between the filament and a friction interface is smaller, and the friction of the spandex filament in high-speed motion is reduced. In addition, some manufacturers improve the elastic modulus of spandex and increase the tensile stress by changing the polymerization formula, so that the shape of the spandex is stable in the high-speed movement process. And too low stress can cause the shape of the strand silk to be easy to deform and tend to be flat, so that the contact area with an interface is increased, friction is increased, and the production stability is not facilitated.
The reduction of the usage amount of the oil agent on the surface of the spandex yarn can lead to the yarn surface to be unsmooth, the dynamic friction between the yarn and a porcelain piece, metal, a guide roller and the like in the process of weaving the upper machine is increased, the unwinding speed on the yarn weaving machine is as high as kilometers per minute, and the high-speed unwinding is easier to cause the problems of spandex yarn splitting, yarn breakage, bundle loosening and the like, so that production equipment is stopped, and raw material waste is caused.
The tests of the tensile property, the creep property and the like of the spandex fiber for the sanitary material can visually reflect the application level of the spandex filament in the paper diaper. And the performance of the spandex yarn in the weaving process can be directly reflected by the tests of the bundling property and the unwinding tension property. At present, relevant product testing standards exist in the testing items of stretching, creeping, unwinding tension and the like, and the bundling property is not evaluated by relevant testing equipment and methods.
The technical standard FZ/T50039-2018, namely the method for testing the cohesion performance of spandex filaments, provides that the cohesion performance is indirectly represented by a force value required by stripping a single spandex filament from a spandex filament bundle. The higher the force value is, the better the cohesion between the filaments is, and the better the bundling property is. But this method is more suitable for fine denier spandex filament with less holes. For the spandex fiber for the sanitary ware with more holes, the error of the process of stripping a single spandex filament is larger, and the position of the stripped single spandex filament in a tow cannot be ensured. If the stripped single spandex filament is positioned on the surface of the filament bundle, the single spandex filament is easier to strip; if it is in the center of the tow, it requires a large force to peel it. The test data will deviate depending on the position of the individual spandex filaments being stripped. In the existing testing method, the bundling property is testing data of spandex yarn under a static state, which is different from the high-speed motion state of spandex in large-scale production.
Disclosure of Invention
In order to solve the problems, the invention provides a testing device and a testing method for the bundling property of spandex fibers for a sanitary material, which can effectively detect the bundling property of the spandex fibers for the sanitary material, provide effective reference for the application of the spandex fibers in the sanitary material, save the manual operation cost and realize industrial automation.
In the invention, the denier of the spandex fiber for the sanitary material is generally more than 420D, the number of monofilament holes exceeds 40, and the cross section of the fiber mainly has a circular shape, an oval shape, a peanut shape and the like. The fibers are false twisted during the spinning process to enable the porous monofilaments to contact with each other, be adhered and finally be embraced into tows.
In the invention, the bundling property of the spandex fiber for the sanitary material means that spandex monofilaments can be separated from a main body strand or the monofilaments can be broken when the spandex fiber is rubbed by parts such as a porcelain piece, a knitting needle, a guide wire hook, a roller and the like in the processing and weaving process, so that the bundling property of the spandex fiber is adopted to represent the mutual cohesion and adhesion degree of the monofilaments of the porous spandex fiber.
In the invention, in order to express the proper conditions under different conditions, spandex fibers, spandex yarns, spandex filament bundles and spandex yarn lines are the same concept; monofilament refers to one of the spandex filament bundles.
The utility model provides a defend material with testing arrangement of spandex fibre bundling nature which characterized in that: the device comprises a spandex OETOT unwinding device, a yarn guide hook, a pre-drafting device, a friction device, an overfeed drafting device, image detection equipment and a yarn suction device;
the pre-drafting device comprises a feeding roller and an output roller 1;
the overfeed drafting device comprises an output roller 1 and an output roller 2.
Optionally, the spandex OETOT (over-end take-off tension) unwinding device includes a test stand and a shaft stand. The spandex silk cake is arranged on the shaft bracket. The spandex spinning cake for the sanitary material has larger mass, and the number of the shaft brackets is more than or equal to 1, so that the spandex spinning cake to be tested can be placed on the shaft brackets. The OETOT unwinding device ensures that the spandex filament is drawn out in an over-end axial unwinding manner. The OETOT unwinding device is small in size, shutdown times can be reduced, and cost is saved. Preferably, the height of the test rack should be between 1.5m and 1.7 m.
Optionally, the number of the godets is at least 2. The thread guide hooks are arranged between the shaft frame and the feeding roller and between the feeding roller and the friction device. The function of the yarn guide hook is to stabilize the spandex yarn and prevent the spandex yarn from shaking, so that the test result is more accurate.
Optionally, the friction device comprises 3 concave friction wheels, which are placed in a triangle, and their positional relationship is not limited. The larger the friction wrap angle formed by the spandex yarn and the 3 concave friction wheels is, the larger the contact area with the 3 concave friction wheels is.
The friction wrap angle is increased, the contact area of the spandex yarn and the friction wheel is increased, the friction resistance of the spandex yarn is increased, and the spandex yarn is easy to split and break, so that the spandex yarn with small denier is not suitable for spandex yarns with large denier. And the friction wrap angle is reduced, so that the spandex yarn with smaller denier is more suitable. The concave friction wheel is designed to be movable, and is used for meeting the requirement of spandex fibers for the sanitary ware with different deniers.
The concave friction wheels are driven.
The groove width range of the concave friction wheel is 4-8mm, the diameter range is 10-20mm, and the column diameter is 6-10mm.
The concave friction wheel is made of ceramic, metal, rubber, abrasive cloth and the like.
The bundling property of the stretched spandex yarn is judged according to the branching and yarn breaking conditions on the surface of the spandex yarn after the stretched spandex yarn is rubbed with the concave friction wheel at a certain angle and speed. The larger the friction wrap angle between the spandex yarn and the concave friction wheel is, the larger the friction force borne by the yarn is, and the yarn is easier to grind.
Optionally, the feeding roller comprises two auxiliary rollers and a drafting roller, and the feeding roller and the auxiliary roller and the feeding roller and the drafting roller are respectively arranged in a triangle. The auxiliary roller and the drafting roller are consistent in size and material, and the drafting roller can effectively reduce the shake of the spandex filament in the stretching movement, prevent the spandex filament from slipping and ensure the stability of the output speed of the spandex filament; the feeding roller can ensure the feeding speed and the tension of the strand silk to be uniform.
Optionally, the delivery roller 1 includes two auxiliary rollers and a drafting roller, and is placed in a triangle, and is the delivery roller 1-auxiliary roller and the delivery roller 1-drafting roller respectively. Wherein the auxiliary roller is the same with the draft roller material, and the diameter of draft roller is 2 times of auxiliary roller diameter, and aim at improves spandex silk functioning speed homogeneous stability, reduces the strand silk risk of skidding.
Optionally, the delivery roller 2 includes two auxiliary rollers and a drafting roller, and is placed in a triangle, and the delivery roller 2-auxiliary roller and the delivery roller 2-drafting roller are respectively provided. The auxiliary roller and the drafting roller are made of the same material, and the diameter of the drafting roller is 2 times of that of the auxiliary roller.
Optionally, the size and material of the output roller 2 are the same as those of the output roller 1.
Optionally, the spandex filaments are wound for a plurality of circles respectively when passing through the feeding roller-drafting roller, the output roller 1-drafting roller and the output roller 2-drafting roller, and the number of circles is not less than 5, so that the speed of the spandex filaments when passing through the devices is stable, and the accuracy of a test result is ensured.
Optionally, the feeding roller, the output roller 1 and the output roller 2 are made of stainless steel and are plated with chrome on the surface.
Optionally, the image detection device includes a CCD camera, a transmission line, and computer detection software.
The optical magnification range of the CCD camera is 50-200 times. The pixel range is 30-100 ten thousand. The distance between the CCD camera screen and the spandex silk is 5-10cm.
The CCD is a charge coupled device (charge coupled device) for short, which can convert light into electric charge and store and transfer the electric charge, and can also take out the stored electric charge to change the voltage, so it is an ideal CCD camera element.
Optionally, the silk suction device comprises compressed air and a silk suction cavity, and the silk suction cavity is used for storing the finished silk strips.
The control equipment of the testing device is a PLC control system, and parameters such as the roller speed, the testing length and the like of each device can be set. The manual operation cost is saved, and the industrial automation is favorably realized.
The bundling property testing method of the spandex fiber bundling property testing device for the toilet articles is characterized by comprising the following steps of:
(1) Placing spandex cakes for the sanitary ware to be detected on a shaft bracket;
(2) The spandex filaments sequentially pass through a yarn guide hook, a feeding roller, a friction device, a delivery roller 1, an image detection device and a delivery roller 2, and finally are sucked into a filament sucking device;
(3) The speeds of a feeding roller, a delivery roller 1 and a delivery roller 2 are set on a control device;
(4) Opening a CCD camera and computer detection software, and starting testing;
(5) The tester observes and records the times of the yarn bifurcation and the yarn breakage through the computer detection software.
In the testing method, the spandex filament cake to be tested is required to be placed in a tension-free state at 20 ℃ and 65% temperature and humidity environment for standing for 24 hours, and the surface layer yarn with the weight of 1-2g is stripped, so that the stability of the environment and the stability of the spandex filament to be tested are ensured, and the testing result is more accurate.
Optionally, the denier of the spandex for the sanitary ware is not less than 420D, and the number of the monofilament holes exceeds 40.
Optionally, the speed range of the feeding roller is 5-10m/min. If the speed is too fast, the branching and breaking of the strand silk are not easy to observe by the tester through the image detection equipment.
Optionally, the speed of the output roller 1 is 2-4 times of the speed of the feeding roller to ensure the stretched state of the strand silk, that is, the strand silk is in a pre-drafting state at this time.
The speed of the output roller 1 is higher than that of the feeding roller, so that the spandex filament bundle is in a stretching state, and the speed ratio of the output roller 1 to the feeding roller is the pre-drafting multiple of the spandex filament. The pre-drafted spandex filament is in a stretched and tensioned state, which is to improve the friction force between the spandex filament and the friction roller. The larger the pre-draft multiple of the spandex filament is, the larger the filament stretching tension is, and the larger the friction resistance is, the more easily the bifurcation and the filament breakage occur.
Optionally, the speed of the output roller 2 is 0.8-1 times of the speed of the output roller 1, so as to ensure the loose state of the filament, that is, the filament is in an overfeed drafting state at this time.
The speed of the output roller 2 is less than that of the output roller 1, at the moment, the spandex filament is in an overfeed drafting state, namely a loose state, and the ratio of the speed of the output roller 2 to the speed of the output roller 1 is an overfeed drafting multiple. If the monofilament is separated or broken from the spandex filament bundle, the split or broken filament can be more easily distinguished in a relaxed state.
Optionally, the number of times of testing each spandex spinning cake is more than or equal to 5, and finally, the accuracy of the testing result is ensured by averaging.
In the testing method, the length of the spandex filament to be tested is more than or equal to 10m, the accuracy of the testing result cannot be ensured if the length is too short, and the longer the length is, the longer the testing time is, and the time is wasted.
In the test method, the test time is related to the length of the spandex filament to be tested and the speed of the feeding roller.
Has the beneficial effects that:
when the device and the method are used for testing the bundling performance of the spandex filaments, the pre-drafting multiple and the overfeeding drafting multiple of the spandex filaments and the friction wrap angle formed by the spandex filaments and the 3 concave friction wheels influence the test result. The larger the pre-drafting multiple of the spandex filament is, the smaller the quality in unit length is, the larger the yarn tension is, the larger the friction resistance is, and the yarn splitting and breaking are more likely to occur. The larger the friction wrap angle between the spandex yarn and the 3 concave friction wheels is, the larger the friction force borne by the yarn is, and the more easily the yarn is sanded. The overfeed draft multiple of the spandex is between 0.8 and 1, and if the overfeed draft multiple is too large or too small, the situation that testers observe the branching and yarn breaking of yarn strips is not facilitated.
The stretched spandex filaments are rubbed with the concave friction wheel at a certain angle, a certain speed difference is set for the pre-drafting device and the overfeeding drafting device, and the branching and filament breaking conditions on the surfaces of the spandex filaments are observed through image detection equipment, so that the bundling property of the spandex filaments is judged. Compared with a static bundling property test, the test method can better meet the actual friction condition of dynamic stretching movement of the spandex yarn in the production and weaving processes.
The pre-drafting of the strand silk is in a stretching and tensioning state, which is beneficial to improving the friction force between the strand silk and the concave friction wheel; overfeed draft is a state in which a yarn bundle is relaxed, and if a monofilament is separated or broken from the yarn bundle, the split or broken yarn is more easily distinguished in the relaxed state. The 'tight one-loose' drafting state effectively improves the judgment force of the strand silk bundling property.
The image detection equipment can clearly observe slight bifurcation and broken filament changes on the surface of the spandex filament, and the accuracy rate of human eye judgment is improved.
The speeds of the feeding roller, the output roller 1 and the output roller 2 and the test length of the strand silk are all controlled and recorded by a PLC, so that the manual operation cost is saved, and the industrial automation is favorably realized.
Drawings
Fig. 1 is a schematic structural view of a spandex fiber bundling property testing device for a sanitary material of the invention.
Description of reference numerals:
the device comprises a shaft bracket 100, a test frame 101, a spandex spinning cake A102, a godet 1-103, a feeding roller-auxiliary roller 104, a feeding roller-drafting roller 105, a godet 2-106, a concave friction wheel 107, a delivery roller 1-auxiliary roller 108, a delivery roller 1-drafting roller 109, an image detection device 110, a delivery roller 2-auxiliary roller 111, a delivery roller 2-drafting roller 112, a yarn suction device 113 and a yarn strip 114.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be further clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. In the interest of clarity and conciseness, not all features of an actual implementation are described in the specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made to achieve the developers' specific goals.
It is also noted that elements and features depicted in one drawing or one embodiment of the invention may be combined with elements and features depicted in one or more other drawings or embodiments to avoid obscuring the invention with unnecessary detail, and that only the structures of the apparatus that are germane to the solution according to the invention are depicted in the drawings and the description, and some structures have been omitted to highlight the features that represent important parts of the apparatus in order to more clearly illustrate the structure of the apparatus according to the invention.
Example 1
The invention relates to a device for testing the bundling property of spandex fibers for guards, which has a schematic structural diagram as shown in figure 1.
A testing device for bundling property of spandex fibers for sanitary materials comprises a spandex OETOT unwinding device, a yarn guide hook, a pre-drafting device, a friction device, an overfeed drafting device, image detection equipment and a yarn suction device. The relative positions of the pre-drafting device, the friction device, the overfeeding drafting device, the image detection equipment and the silk suction device are sequentially arranged from top to bottom.
The spandex OETOT unwinding device comprises a shaft bracket 100 and a test bracket 101; the silk guide hooks 1-103 are arranged between the shaft bracket 100 and the feeding roller; the pre-drafting device comprises a feeding roller and an output roller 1, the feeding roller consists of 2 feeding rollers-auxiliary rollers 104 and a feeding roller-drafting roller 105, the roller materials and the diameters are the same, and the rollers are arranged in a triangle shape; the friction device consists of 3 concave friction wheels 107, the friction wheels are made of the same material and have the same diameter and are arranged in a triangle shape, the friction wrap angle formed by the spandex yarn and the 3 concave friction wheels 107 is 90-180-90 degrees, and the concave friction wheels 107 are driven; the silk guide hooks 2-106 are arranged between the feeding roller and the friction device; the overfeed drafting device comprises an output roller 1 and an output roller 2, wherein the output roller 1 consists of two output rollers 1-an auxiliary roller 108 and an output roller 1-a drafting roller 109, the rollers are made of the same material, and the diameter of the output roller 1-the drafting roller 109 is 2 times of that of the output roller 1-the auxiliary roller 108 and is arranged in a triangle; the output roller 2 consists of two output rollers 2-an auxiliary roller 111 and one output roller 2-a drafting roller 112, and is arranged in a triangle shape, and the material and the diameter of the output roller 2 and the output roller 1 are the same; the image detection device 110 comprises a CCD camera, a transmission line and computer detection software, wherein the CCD camera is produced by Beijing Jiaheng from image technology Limited company and has the model number of OK-AC1361 colorful CCD area array camera; the silk suction device 113 comprises compressed air and a silk suction cavity for storing the finished silk strips.
The spandex cake a102 to be measured is placed on the creel 100, and the threadline 114 passes through the godets 1 to 103 and then bypasses the feed roller-assist roller 104 and the feed roller-draft roller 105 of the feed roller device. The positions of the godets 1-103 are in the same line with the upper surfaces of the shaft frame 100 and the two feed rollers-auxiliary rollers 104. The diameter of the feed roller-sub roller 104 and the feed roller-draft roller 105 was 4cm. After passing through the godet 2-106, the strand silk which bypasses the feeding roller-auxiliary roller 104 bypasses 3 concave friction wheels of the friction device, the groove width of the concave friction wheels is 4mm, the diameter of the concave friction wheels is 10mm, the column diameter of the concave friction wheels is 6mm, and the strand silk is made of metal. The positions of the godets 2 to 106 are in the same line with the right surface of the feed roller-assist roller 104 and the right surface of the concave friction wheel 107. The filament drawn by the concave friction wheel 107 passes around the delivery roller 1-auxiliary roller 108 and the delivery roller 1-drafting roller 109, the diameter of the delivery roller 1-auxiliary roller 108 is 4cm, and the diameter of the delivery roller 1-drafting roller 109 is 8cm. The filament yarn output from the delivery roller 1-the auxiliary roller 108 passes through the image detection device 110, and then bypasses the delivery roller 2-the auxiliary roller 111 and the delivery roller 2-the draft roller 112, the diameter of the delivery roller 2-the auxiliary roller 111 is 4cm, and the diameter of the delivery roller 2-the draft roller 112 is 8cm. The filament bundle is finally sucked into the filament sucking device 113.
Example 2
The embodiment relates to a method for testing the bundling property of spandex fibers for guards, which adopts the testing device in the embodiment 1 to test the bundling property of the spandex fibers. The method comprises the following specific steps:
(1) Taking a spandex filament cake A102 for a sanitary material to be detected, placing the spandex filament cake A102 in a tension-free state at 20 ℃ and 65%, stripping surface layer filaments with the weight of 1-2g, and then placing the spandex filament cake A102 on a shaft bracket 100; spandex cake a102 was heavy denier yarn with a denier of 560D.
(2) The silk strips 114 sequentially pass through a silk guide hook 1-103, a feeding roller-auxiliary roller 104, a feeding roller-drafting roller 105, a silk guide hook 2-106, 3 concave friction wheels 107, an output roller 1-auxiliary roller 108, an output roller 1-drafting roller 109, an image detection device 110, an output roller 2-auxiliary roller 111 and an output roller 2-drafting roller 112, and finally the silk strips 114 are sucked into a silk suction device 113;
(3) Setting the speeds of a feeding roller, a delivery roller 1 and a delivery roller 2 on control equipment to be 5m/min, 15m/min and 12m/min respectively;
(4) Opening a CCD camera and computer detection software, adjusting the position of a screen of the CCD camera and the relative position of the spandex filament to enable the distance between the screen of the camera and the spandex filament to be 5cm, and then starting testing;
(5) A tester observes a real-time image in computer detection software, records the times of bifurcation and broken silk of a silk strip within 20m of length, and tests a spandex spinning cake A for 10 times, wherein the times are A1, A2, A3, A4, A5, A6, A7, A8, A9 and A10 respectively; then, the same method was used to test spandex cakes B, which were heavy denier yarn with a denier of 560D, for 10 tests, B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, respectively, and the final data were counted as shown in table 1.
TABLE 1 test results of spandex spinning cake bundling property
In the step (2), the friction wrap angle formed by the filament strips 114 and the 3 concave friction wheels 107 is 90-180-90 degrees, the wrap angle is set to enable the contact area between the filament strips 114 and the concave friction wheels 117 to be larger, and the higher the friction force borne by the filaments is, the more easily the filaments are sanded.
In the step (2), the filament 114 is wound by 10 circles when passing through the feeding roller-drawing roller 105, the output roller 1-drawing roller 109 and the output roller 2-drawing roller 112, so that the speed of the filament 114 is uniform and stable when passing through the pre-drawing device and the overfeeding drawing device, and the accuracy of the test result is ensured.
In the step (2), the silk guide hooks 1-103 and the silk guide hooks 2-106 have the functions of stabilizing the silk strips and avoiding shaking.
In the step (2), the diameters of the delivery roller 1-auxiliary roller 108, the delivery roller 1-drafting roller 109, the delivery roller 2-auxiliary roller 111 and the delivery roller 2-drafting roller 112 are respectively 4cm, 8cm, 4cm and 8cm. The diameter of the drafting roller is 2 times of that of the auxiliary roller, so that the uniform stability of the running speed of the spandex filament is improved, and the slip risk of the strand silk is reduced.
In the step (3), the speed of the output roller 1 is 3 times of that of the feeding roller, namely, the strand silk is stretched by 3 times when passing through the feeding roller and the output roller 1, the strand silk is in a stretching and tensioning state, the tension of the strand silk is higher, the born friction resistance is also higher, and the bifurcation and the broken silk are more likely to occur. The speed of the output roller 2 is 0.8 times of the speed of the output roller 1, the strand silk is in a loose state, and testers can clearly observe fine branching and broken silk changes on the surface of the spandex silk through the image detection equipment 110, so that the judgment accuracy is improved. The 'one tight one loose' drafting state effectively improves the judgment force of the strand silk bundling property.
In the step (5), 10 spandex spinning cakes are taken for parallel test, so that the reliability of the test result can be ensured, and the influence caused by accidental factors can be avoided.
The frequency of the occurrence of bifurcation and broken filament of the filament in the length of 20m is recorded by the testing method, and the speed of the feeding roller is 5m/min, so that the time required for completing the test is 4min.
As can be seen from Table 1, the total number of the branching and the broken yarn of the spandex cake A is 25 to 45, the total number of the branching and the broken yarn of the spandex cake B is 10 to 20, and the smaller the number of the branching and the broken yarn of the spandex yarn is, the better the bundling property of the sample is. According to market application feedback data of the samples A and B, the sample B has good performance in the subsequent production practice, and can meet the requirements of high efficiency and high speed in the production of sanitary products. Therefore, by using the testing device and the testing method, the bundling property of the coarse denier spandex used for the sanitary material can be effectively tested, and data support is provided for market application of the sanitary material spandex.
According to the testing method, the stretched spandex yarn is rubbed with the concave friction wheel at a certain angle, a certain speed difference is set for the pre-drafting device and the overfeeding drafting device, and the branching and yarn breaking conditions on the surface of the spandex yarn are observed through image detection equipment, so that the bundling property of the spandex yarn is judged, and data support is provided for market application of sanitary spandex. Compared with a static bundling property test, the test method can better meet the actual friction condition of dynamic stretching movement of the spandex yarn in the production and weaving process.
Claims (10)
1. The utility model provides a defend material with testing arrangement of spandex fibre bundling nature which characterized in that: the device comprises a spandex OETOT unwinding device, a yarn guide hook, a pre-drafting device, a friction device, an overfeeding drafting device, image detection equipment and a yarn suction device;
the pre-drafting device comprises a feeding roller and an output roller 1;
the overfeed drafting device comprises an output roller 1 and an output roller 2.
2. The device for testing the bundling property of the spandex fiber for the toilet articles according to claim 1, wherein: the friction device comprises 3 concave friction wheels which are arranged in a triangular shape.
3. The device for testing the bundling property of the spandex fiber for the toilet articles according to claim 1, wherein: the feeding roller comprises two auxiliary rollers and a drafting roller which are arranged in a triangle.
4. The device for testing the bundling property of the spandex fiber for the toilet articles according to claim 1, wherein: the output roller 1 comprises two auxiliary rollers and a drafting roller and is placed in a triangular shape.
5. The device for testing the bundling property of the spandex fiber for the toilet articles according to claim 1, wherein: the output roller 2 comprises two auxiliary rollers and a drafting roller and is placed in a triangular shape.
6. The device for testing the bundling property of the spandex fiber for the toilet articles according to claim 1, wherein: the image detection device comprises a CCD camera, a transmission line and computer detection software.
7. A testing method for bundling property of spandex fiber for a sanitary material is characterized by comprising the following steps:
(1) Placing spandex cakes for the sanitary ware to be detected on a shaft bracket;
(2) The spandex filaments sequentially pass through a yarn guide hook, a feeding roller, a friction device, a delivery roller 1, an image detection device and a delivery roller 2, and finally are sucked into a filament sucking device;
(3) Setting the speeds of a feeding roller, an output roller 1 and an output roller 2 on a control device;
(4) Opening a CCD camera and computer detection software, and starting testing;
(5) The tester observes and records the times of the branching and the broken silk of the silk strips through the computer detection software.
8. The method for testing the bundling property of the spandex fibers for sanitary materials according to claim 7, wherein the method comprises the following steps: the speed of the output roller 1 is 2-4 times of that of the feeding roller.
9. The method for testing the bundling property of the spandex fiber for a sanitary material according to claim 7, wherein: the speed of the output roller 2 is 0.8-1 times of the speed of the output roller 1.
10. The method for testing the bundling property of the spandex fibers for sanitary materials according to claim 7, wherein the method comprises the following steps: the denier of the spandex for the sanitary material is more than or equal to 420D, and the number of the monofilament holes exceeds 40.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211560623.5A CN115932226A (en) | 2022-12-07 | 2022-12-07 | Testing device and testing method for bundling property of spandex fiber for sanitary material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211560623.5A CN115932226A (en) | 2022-12-07 | 2022-12-07 | Testing device and testing method for bundling property of spandex fiber for sanitary material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115932226A true CN115932226A (en) | 2023-04-07 |
Family
ID=86700295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211560623.5A Pending CN115932226A (en) | 2022-12-07 | 2022-12-07 | Testing device and testing method for bundling property of spandex fiber for sanitary material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115932226A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118090586A (en) * | 2024-04-24 | 2024-05-28 | 东华大学 | Internal friction force boundary test method for twisted sliver |
-
2022
- 2022-12-07 CN CN202211560623.5A patent/CN115932226A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118090586A (en) * | 2024-04-24 | 2024-05-28 | 东华大学 | Internal friction force boundary test method for twisted sliver |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Levitt et al. | Effect of electrospinning processing variables on polyacrylonitrile nanoyarns | |
| CA1036437A (en) | Product and process for making a wrapped yarn | |
| CN105316818B (en) | Spinning machine, Yarn spinning method and spinning | |
| CN115932226A (en) | Testing device and testing method for bundling property of spandex fiber for sanitary material | |
| US8316629B2 (en) | Polytetrafluoroethylene real twist yarn and method of producing the same | |
| BRPI0518081B1 (en) | elastic fiber of crosslinked polymer olefins and use of one or more inorganic fillers to improve the dynamic coefficient of friction of elastic fibers of crosslinked olefin polymers | |
| CN109594163B (en) | Production method of graphene chinlon and cotton blended yarn | |
| Zhou et al. | Strip twisted electrospun nanofiber yarns: Structural effects on tensile properties | |
| US6294252B1 (en) | Precursor fiber bundle for production of a carbon fiber bundle, a process for producing the precursor fiber bundle, a carbon fiber bundle, and a process for producing the carbon fiber bundle | |
| Lin et al. | Mechanical properties of highly elastic complex yarns with spandex made by a novel rotor twister | |
| JP2007521403A (en) | Staple fiber and manufacturing method thereof | |
| US20090183487A1 (en) | Staple yarn manufacturing process | |
| CN103510217B (en) | The irregular detection method of periodicity of fibre machinery and fibre machinery | |
| EP1769107A2 (en) | Cellulose acetate tow and method of making same | |
| US6495254B1 (en) | Poly(trimethylene terephthalate) fiber | |
| CN202945473U (en) | Yarn twist stability testing device | |
| CN102384911B (en) | Device and method for detecting hollowness and core exposure yarn defect of elastic core-spun yarn | |
| Kim et al. | Detection of wrapping defects by a machine vision and its application to evaluate the wrapping quality of the ring core spun yarn | |
| EP3227481A1 (en) | Method and device for automatically monitoring the quality of tubes on spinning and twisting spindles | |
| CN101627153B (en) | Polyester fiber, and fabric comprising the same | |
| JP4018968B2 (en) | Method for producing extra fine polyester false twisted yarn | |
| CN218822271U (en) | Testing arrangement of synthetic fiber fibre number | |
| CN202189020U (en) | Device for detecting hollow core and exposed core yarn faults of elastic covering yarns | |
| CN114481394B (en) | Production device and process method of plied yarn for surface unwinding | |
| CN207047448U (en) | A kind of weaving drawing frame |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |