CN112140684B

CN112140684B - Breathable fiber fabric preparation device and preparation method thereof

Info

Publication number: CN112140684B
Application number: CN202010975629.3A
Authority: CN
Inventors: 张水法; 许峰; 许诚
Original assignee: Shenzhen Tonganna Children Bedding Co ltd
Current assignee: Shenzhen Anzhen Technology Co ltd
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2022-07-19
Anticipated expiration: 2040-09-16
Also published as: WO2022057587A1; CN112140684A

Abstract

The invention discloses a device and a method for preparing a breathable fiber fabric, wherein the device comprises the following steps: the fiber spinning device comprises a forming table and an operating table, wherein a plurality of movable shafts are arranged on the forming table, a plurality of shaping modules are arranged on the movable shafts, a fiber to be formed is arranged between every two adjacent movable shafts, the fiber to be formed is connected with a reel and a first clamp through the fiber to be formed, a plurality of sprayers are correspondingly arranged on each fiber to be formed vertically, grooves are formed in the shaping modules, and heating devices are arranged in the movable shafts; every first anchor clamps all correspond on the operation panel and be provided with the second anchor clamps, through the shaping fibre link up first anchor clamps with the second anchor clamps all are provided with the quench device on first anchor clamps and the second anchor clamps, and the interval is provided with a plurality of base cloths on the operation panel, and every shaping fibrous top all corresponds and is provided with a plurality of ultrasonic bonding heads. The device provided by the invention can realize integrated flow process of shaping, spraying and bonding, and prepare the fabric with good air permeability and moisture absorption.

Description

Preparation device and preparation method of breathable fiber fabric

Technical Field

The invention relates to the technical field of fabric preparation or the technical field of fiber fabrics, in particular to a device and a method for preparing a breathable fiber fabric.

Background

With the continuous development of science and technology, textile fabrics meeting different requirements of people are in a large number to meet the requirements of consumers, and the fabrics play an increasingly important role in the daily life of people as materials for making clothes. The popular fabrics in the market are as follows: cotton cloth, hemp cloth, silk, leather, chemical fiber, modal, etc. The characteristics of these fabrics are different due to different manufacturing methods or materials, for example: the chemical fiber is soft, smooth and comfortable, but has poor hygroscopicity and air permeability; the cotton cloth is soft and close to the skin, has better moisture absorption and air permeability, but is easy to shrink and wrinkle and is not wear-resistant.

The existing clothes mostly adopt single common fabrics, and the high-humidity and high-temperature areas of the human body are mainly distributed at the parts such as the back scapula, the front chest, the armpit and the like; the single common fabric does not have moisture absorption and air permeability, most of the fabric is hot when being worn, a human body is easy to stick under a motion state, the wet feeling and the sticky feeling of wearing are strong, and even the fabric is large in area and moist, so that the whole wearing comfort is poor.

The existing fabric preparation can not finish the processes of fabric shaping, spraying and bonding simultaneously by one set of equipment, and the produced fabric has poor quality. Therefore, it is required to provide a device for preparing breathable fiber fabric, which can realize integrated flow process of shaping, spraying and bonding, is suitable for large-scale industrial production, can increase the gap between the fabric and the skin surface when the prepared fiber fabric meets sweat, and has the performances of good breathability and strong hygroscopicity.

Disclosure of Invention

The invention overcomes the defects of the prior art and provides a device and a method for preparing a breathable fiber fabric.

In order to achieve the purpose, the invention adopts the technical scheme that: a breathable fiber fabric preparation device comprises: a forming table and an operating table, which are characterized in that,

the forming table is provided with a plurality of movable shafts, a plurality of forming modules are arranged on the movable shafts, a fiber to be formed is arranged between every two adjacent movable shafts, the fiber to be formed is connected with the reel and the first clamp through the fiber to be formed, a plurality of sprayers are correspondingly arranged on each fiber to be formed vertically, a groove is formed in each forming module, and a heating device is arranged in each movable shaft;

every first anchor clamps are in all correspond on the operation panel and be provided with the second anchor clamps, link up through the shaping fibre first anchor clamps with the second anchor clamps, first anchor clamps with all be provided with the quench device on the second anchor clamps, the interval is provided with a plurality of base cloths on the operation panel, every the fibrous top of shaping all corresponds and is provided with a plurality of ultrasonic bonding heads.

In a preferred embodiment of the invention, the cross section of the groove is semi-elliptical, and the groove is parallel to the fiber to be formed.

In a preferred embodiment of the present invention, the first coating nozzle and the second coating nozzle, which are respectively disposed above and below the fiber to be formed, respectively contain a hydrophilic coating material and a hydrophobic coating material.

In a preferred embodiment of the present invention, a plurality of limiting columns are further disposed between adjacent movable shafts.

In a preferred embodiment of the present invention, a plurality of marking nozzles are regularly distributed in the sprayer above the fiber to be molded.

In a preferred embodiment of the present invention, a cutter is further disposed on the first clamp.

In a preferred embodiment of the invention, the shaping modules on adjacent movable shafts are arranged in a regularly staggered manner.

In a preferred embodiment of the present invention, the movable shaft and the first clamp move simultaneously by the same distance.

In a preferred embodiment of the present invention, the setting temperature of the heating device in the movable shaft is set to 150 to 210 ℃, and the heating time is 30 to 40 seconds.

The invention provides a preparation method of a breathable fiber fabric preparation device, which is characterized by comprising the following steps of:

s1, after the fiber to be formed in the reel is stretched straight by the clamp, the adjacent movable shaft moves, the fiber to be formed with a circular section is extruded in the forming module, and the fiber to be formed with an oval section is subjected to heat forming;

s2, spraying hydrophilic paint and hydrophobic paint on the surface of each fiber to be molded according to a rule by a first coating nozzle and a second coating nozzle which are correspondingly arranged above and below each fiber to be molded; spraying a marking spray material by a sprayer above the fiber to be molded through a marking nozzle to obtain a molded fiber;

and S3, after the formed fiber is cooled, the formed fiber is attached to the base cloth by the first clamp and the second clamp, and the formed fiber is bonded with the base cloth by the ultrasonic bonding head at the spraying position of the formed fiber spraying mark.

In a preferred embodiment of the present invention, in S2, the arc surfaces of the two shaped fibers corresponding to the major axes of the elliptical cross-sections are sprayed with a hydrophobic coating on the arc surface close to the base fabric, and a hydrophilic coating on the other arc surface, and the hydrophilic coatings, the hydrophobic coatings and the marked spray are regularly sprayed.

In a preferred embodiment of the present invention, after S3, the prepared fabric can be placed on a detection table by ultrasonic quality inspection, an ultrasonic probe is used to transmit a pulse wave to the surface of the fabric, and the bonding rate of the fibers formed on the surface of the fabric is detected according to the condition of the reflected wave, wherein the bonding rate is 100% for qualified fabric, otherwise, the fabric is unqualified fabric.

The invention also provides a breathable fiber fabric, which is characterized in that: the base cloth is provided with a plurality of forming fibers distributed in parallel, the forming fibers are connected with the base cloth in an adhesion mode, the forming fibers are oval cylinders, the core part of each forming fiber is further provided with salt-sensitive hydrogel, and hydrophilic paint and hydrophobic paint are regularly sprayed on the surface of each forming fiber.

In a preferred embodiment of the present invention, the skin is made of PE, and the material has a low melting point and a certain moisture absorption.

In a preferred embodiment of the present invention, the base fabric may be one or both of a bamboo fiber fabric and a modal fabric with high moisture conductivity.

The invention solves the defects in the background technology, and has the following beneficial effects:

according to the device for preparing the breathable fiber fabric, provided by the invention, the rapid shaping of the fiber to be shaped is realized through the heat shaping treatment of the shaping mold, the hydrophilic coating, the hydrophobic coating and the marking coating are sprayed on the surface of the fiber to be shaped according to a certain rule, the fiber and the base cloth are bonded and shaped in an ultrasonic bonding mode, the base cloth is arranged on the operation table, and one working cycle is completed after each bonding, so that the integrated flow process is realized, and the production process is simplified.

According to the invention, the shaping modules on the adjacent movable shafts are arranged in a staggered manner according to a rule, so that when the fiber to be shaped is extruded in a moving manner, the fiber to be shaped can be shaped into a wave shape; each shaping module is also provided with a groove, the cross section of the groove is in a semi-ellipse shape, the groove is arranged in parallel with the fiber to be shaped, when the adjacent movable shafts move, the two shaping modules with semi-ellipse cross sections are combined to form an elliptical cavity, the fiber to be shaped is extruded and is heated and shaped.

In the invention, sprayers are arranged above and below the fiber to be molded, a first coating nozzle and a second coating nozzle are respectively arranged according to a certain rule, a plurality of marking nozzles are also distributed in the sprayers above the fiber to be molded according to the rule, the arc surfaces of two molded fibers corresponding to the long axis of the elliptical cross section are sprayed with hydrophobic coatings, the other arc surface is sprayed with hydrophilic coatings, and the hydrophilic coatings, the hydrophobic coatings and the marking spray material between the hydrophobic coatings are sprayed according to the rule.

According to the invention, the movable shaft is internally provided with a heating device, the first clamp and the second clamp are both provided with quenching devices, and the fiber to be formed is heated to the required temperature and then cooled so as to complete the process from relaxation and reformation to new-form shaping, so that the formed fiber has certain directionality.

According to the invention, the plurality of limiting columns are arranged between the adjacent movable shafts, so that when the shaping modules extrude the fiber to be formed mutually, the parallel fit of the groove of the positioning module and the fiber to be formed is ensured, and the deformation of the oval section of the fiber to be formed and the abrasion of the groove caused by too short distance between the adjacent movable shafts are prevented.

According to the breathable fiber fabric provided by the invention, the salt-sensitive hydrogel in the core layer of the formed fiber absorbs moisture and sweat to generate swelling reaction, and the hydrophilic coating and the hydrophobic coating on the formed fiber are matched to cause uneven stress on the cross section, so that the formed fiber is bent and tilted, the distance between the fabric and the skin is increased, the breathability of the fabric is improved, and the salt-sensitive hydrogel absorbs moisture and sweat has certain water retention; the fabric is light and thin in texture, smooth in hand feeling, not easy to stick to the body when a human body is in a motion state, low in moisture and stickiness of the fabric, and good in overall wearing comfort.

The breathable fiber fabric provided by the invention is comfortable to wear, good in breathability and strong in hygroscopicity, and is particularly suitable for products such as sports clothes and sports protectors, which are in direct contact with skin. In addition, can also combine human sweat gland to distribute and set up this surface fabric, when sweating like the human motion, human high humidity and high temperature area mainly distribute in positions such as back shoulder blade, preceding chest and armpit, set up this surface fabric at these positions, other positions set up the bamboo fibre surface fabric of high moisture conductivity or the strong modal surface fabric of thermal resistance, can make the human body not sultry under motion state, the moist sense of dress is lower with glutinous body sense, the comfort of whole dress is better.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts;

FIG. 1 is a perspective block diagram of a preferred embodiment of the present invention;

FIG. 2 is a perspective view of a forming table of a preferred embodiment of the present invention;

FIG. 3 is a front view of a forming station of a preferred embodiment of the present invention;

FIG. 4 is a partial perspective view of a forming table of the preferred embodiment of the present invention;

FIG. 5 is a perspective view of a movable shaft according to a preferred embodiment of the present invention;

FIG. 6 is a perspective view of the movable shaft of the preferred embodiment of the present invention;

FIG. 7 is a perspective block diagram of the console of the preferred embodiment of the present invention;

FIG. 8 is a perspective view of a formed fiber of the preferred embodiment of the present invention;

in the figure: 100. a forming table; 110. a movable shaft; 111. a heating device; 120. a shaping module; 121. a groove; 130. fiber to be formed; 140. a reel; 150. a first clamp; 151. a cutter; 160. a sprayer; 161. A marking nozzle; 162. a first coating nozzle; 163. a second coating nozzle; 170. a limiting column;

200. an operation table; 210. a second clamp; 211. a quenching device; 220. an ultrasonic bonding head; 230. a base cloth;

300. forming fibers; 310. a hydrophilic coating; 320. a hydrophobic coating.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the scope of the present application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art through specific cases.

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

The invention will now be described in further detail with reference to the drawings, which are simplified schematic drawings illustrating only the basic structure of the invention in a schematic manner, and examples, which therefore show only the constituents relevant to the invention.

As shown in fig. 1 and 2, a device for preparing a breathable fiber fabric includes: the forming table 100 and the operation table 200, wherein the forming table 100 is provided with a plurality of movable shafts 110, the movable shafts 110 are provided with a plurality of shaping modules 120, and the shaping modules 120 on the adjacent movable shafts 110 are arranged in a staggered manner according to a rule, so that the movable shafts 110 can shape the fiber 130 to be formed into a wave shape when the movable shafts 110 move to extrude the fiber 130 to be formed.

As shown in fig. 2, 3 and 4, a fiber 130 to be formed is disposed between adjacent movable shafts 110, a reel 140 and a first clamp 150 are connected by the fiber 130 to be formed, each fiber 130 to be formed is provided with a plurality of sprayers 160 correspondingly up and down in the vertical direction, and a first coating nozzle 162 and a second coating nozzle 163 respectively provided with a hydrophilic coating and a hydrophobic coating are respectively included. A plurality of marking nozzles 161 are regularly distributed in the sprayer 160 above the fiber 130 to be formed, and the marked part of the fiber 130 to be formed is the part needing to be bonded.

It should be noted that, in the present invention, the sprayers 160 are respectively disposed above and below the fiber 130 to be molded, and the first coating nozzle 162 and the second coating nozzle 163 are respectively disposed according to a certain rule, a plurality of marking nozzles 161 are further regularly distributed in the sprayer 160 above the fiber 130 to be molded, the arc surfaces of the two molded fibers 300 corresponding to the major axis of the elliptical cross section, wherein the arc surface close to the base fabric 230 is sprayed with the hydrophobic coating, the other arc surface is sprayed with the hydrophilic coating 310, and the plurality of hydrophilic coatings 310, the plurality of hydrophobic coatings 320, and one marking spray therebetween are regularly sprayed.

As shown in fig. 5, each of the sizing modules 120 is further provided with a groove, the cross section of the groove is a semi-ellipse, the groove is arranged in parallel with the fiber 130 to be formed, when the adjacent movable shafts 110 move, the two sizing modules 120 with semi-ellipse cross sections are combined to form an elliptical cavity, the fiber 130 to be formed is extruded, and heat-sizing is performed. And a plurality of spacing posts arranged between the adjacent movable shafts 110 can ensure that the grooves of the positioning modules are in parallel fit with the fibers 130 to be formed when the shaping modules 120 extrude the fibers 130 to be formed mutually, and prevent the elliptical cross sections of the fibers 130 to be formed from deforming and abrasion of the grooves due to too close distance between the adjacent movable shafts 110.

As shown in FIG. 6, a heating device 111 is disposed in the movable shaft 110, and the setting temperature of the heating device 111 in the movable shaft 110 is set to be 150-210 ℃, and the heating time is 30-40 seconds. The heating process of the setting module 120 by the heating means extrudes the fiber 130 to be formed, which has a circular cross section, in the setting module 120, and heat-sets the fiber into a fiber having an elliptical cross section.

As shown in fig. 7, the first clamp 150 is further provided with a cutter 151, and the cutter 151 cuts the formed fiber 300 on the first clamp 150 once every time the bonding work is completed. Every first anchor clamps 150 all corresponds on the operation panel and is provided with second anchor clamps 210, links up first anchor clamps 150 and second anchor clamps 210 through shaping fibre 300, all is provided with quench device 211 on first anchor clamps 150 and the second anchor clamps 210, and the interval is provided with a plurality of base cloths 230 on the operation panel, and every top of shaping fibre 300 all corresponds and is provided with a plurality of ultrasonic bonding heads 220.

In the present invention, the movable shaft 110 is provided with a heating device 111, and the first clamp 150 and the second clamp 210 are provided with a quenching device 211, so that the fiber 130 to be formed is subjected to a process from relaxation, reforming to a new shape setting by heating to a desired temperature and then cooling.

s1, after the fiber 130 to be formed in the reel is straightened by the clamp, the adjacent movable shaft moves, the fiber to be formed with a circular section is extruded in the forming module, and the fiber to be formed is heat-formed into a fiber with an oval section;

s2, spraying hydrophilic paint and hydrophobic paint on the surface of each fiber to be formed according to a rule by a first coating nozzle and a second coating nozzle which are correspondingly arranged above and below each fiber to be formed; spraying a marking spray material by a sprayer above the fiber to be formed through a marking nozzle to obtain a formed fiber;

In S2, the arc surfaces of the two shaped fibers corresponding to the major axes of the elliptical cross-sections are sprayed with a hydrophobic coating on the arc surface close to the base fabric, and a hydrophilic coating is sprayed on the other arc surface, and the hydrophilic coatings, the hydrophobic coatings and the one marking spray therebetween are regularly sprayed.

After S3, the prepared fabric can be placed on a detection table through ultrasonic quality detection, an ultrasonic probe is used for transmitting pulse waves to the surface of the fabric, the bonding rate of the forming fibers on the surface of the fabric is detected according to the condition of reflected waves, the bonding rate is 100% and is qualified fabric, otherwise, the bonding rate is unqualified fabric.

As shown in fig. 8, between the bonds, the arcuate surface on one side of the formed fiber is coated with a coating and the arcuate surface on the other side is free of coating sites; wherein the arc surface adhered with the base cloth is coated with hydrophobic paint, and the other arc surface is coated with hydrophilic paint.

The invention also provides a breathable fiber fabric, which is characterized in that: the base cloth is provided with a plurality of forming fibers which are distributed in parallel, the forming fibers are connected with the base cloth in an adhesive mode, the forming fibers are oval cylinders, salt-sensitive hydrogel is further arranged at the core of the forming fibers, and hydrophilic coating and hydrophobic coating are regularly sprayed on the surface of the forming fibers. According to the breathable fiber fabric provided by the invention, the salt-sensitive hydrogel in the core layer of the formed fiber absorbs moisture and sweat to perform a swelling reaction, and the hydrophilic coating and the hydrophobic coating on the formed fiber are matched to cause the stress cloth on the cross section to be uniform, so that the formed fiber is bent and tilted, the distance between the fabric and the skin is increased, the breathability of the fabric is improved, and the salt-sensitive hydrogel absorbs moisture and sweat also has a certain water retention property; the base fabric can adopt one or two of bamboo fiber fabric or modal fabric with high moisture conductivity. The fabric is light and thin in texture, smooth in hand feeling, not easy to stick to the body when a human body is in a motion state, low in moisture and stickiness of the fabric, and good in overall wearing comfort.

When the invention is used, the preparation method of the device for preparing the breathable fiber fabric comprises the following steps: s1, after straightening the fiber to be formed in the reel by the clamp, moving the adjacent moving shaft, extruding the fiber to be formed with a circular section in the forming module, and heat-forming the fiber with an elliptical section; s2, spraying hydrophilic paint and hydrophobic paint on the surface of each fiber to be molded according to a rule by a first coating nozzle and a second coating nozzle which are correspondingly arranged above and below each fiber to be molded, wherein the long axis of the elliptical cross section of the arc-shaped surfaces of the two molded fibers corresponds to the long axis of the elliptical cross section, the hydrophobic paint is sprayed on the arc-shaped surface close to the base cloth, the hydrophilic paint is sprayed on the other arc-shaped surface, and the hydrophilic paint, the hydrophobic paint and the mark spray material between the hydrophilic paint and the hydrophobic paint are sprayed according to a rule; spraying a marking spray material by a sprayer above the fiber to be molded through a marking nozzle to obtain a molded fiber; and S3, after the formed fiber is cooled, the formed fiber is attached to the base cloth by the first clamp and the second clamp, and the formed fiber is bonded with the base cloth by the ultrasonic bonding head at the spraying position of the formed fiber spraying mark.

When the ultrasonic quality inspection device is used, the prepared fabric can be placed on an inspection table through ultrasonic quality inspection, the ultrasonic probe transmits pulse waves to the surface of the fabric, the bonding rate of the forming fibers on the surface of the fabric is inspected according to the condition of reflected waves, the fabric with the bonding rate of 100 percent is qualified, and the fabric with the bonding rate of 100 percent is unqualified. The quality inspection method can detect whether each formed fiber is adhered to the base cloth or not, if not, gaps are inevitably generated to bulge, and unqualified prepared products can be effectively eliminated through ultrasonic or illumination detection.

In addition, when the sweat gland type sports wear is used, the fabric can be arranged by combining with sweat gland distribution of a human body, for example, when the human body sweats during sports, high humidity and high temperature areas of the human body are mainly distributed at the parts such as the back scapula, the front chest, the armpit and the like, the fabric is arranged at the parts, and bamboo fiber fabric with high moisture conductivity or modal fabric with high heat resistance is arranged at other parts, so that the human body is not stuffy under the sports state, the damp feeling and the sticky feeling of wearing are low, and the whole wearing comfort is better.

While the preferred embodiments of the present invention have been described, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A breathable fiber fabric preparation device comprises: a forming table and an operating table, which are characterized in that,

each first clamp is correspondingly provided with a second clamp on the operation table, the first clamp and the second clamp are connected through forming fibers, quenching devices are arranged on the first clamp and the second clamp, a plurality of base cloths are arranged on the operation table at intervals, and a plurality of ultrasonic bonding heads are correspondingly arranged above each forming fiber;

the cross section of the groove is semi-elliptical, and the groove is parallel to the fiber to be molded;

the first coating nozzle and the second coating nozzle which are respectively arranged on the sprayer above and below the fiber to be molded respectively contain hydrophilic paint and hydrophobic paint; a plurality of marking nozzles are regularly distributed in the sprayer above the fiber to be molded, the marking nozzles contain marking spraying materials, and a plurality of hydrophilic coatings, a plurality of hydrophobic coatings and one marking spraying material among the hydrophilic coatings are regularly sprayed;

the shaping modules on the adjacent movable shafts are arranged in a staggered mode according to a rule.

2. The breathable fiber fabric preparation device according to claim 1, wherein: and a plurality of limiting columns are also arranged between the adjacent movable shafts.

3. The apparatus for preparing a breathable fiber fabric according to claim 1, wherein: the first clamp is also provided with a cutter.

4. The preparation method of the breathable fiber fabric preparation device based on any one of claims 1 to 3 is characterized by comprising the following steps of:

s1, after straightening the fiber to be formed in the reel by the first clamp, moving the adjacent moving shaft, extruding the fiber to be formed with a circular section in the forming module, and heat-forming the fiber with an oval section;

s2, spraying hydrophilic paint and hydrophobic paint on the surface of each fiber to be formed according to a rule by a first coating nozzle and a second coating nozzle which are correspondingly arranged above and below each fiber to be formed; spraying a marking spray material by a sprayer above the fiber to be molded through a marking nozzle to obtain a molded fiber; the long axis of the elliptic section of the arc surfaces of the two molding fibers corresponds to, wherein the arc surface close to the base cloth is sprayed with hydrophobic coating, the other arc surface is sprayed with hydrophilic coating, and a plurality of hydrophilic coatings, a plurality of hydrophobic coatings and one marking spraying material among the hydrophilic coatings are sprayed regularly; the surface of the fiber to be molded is made of PE material and has certain hygroscopicity, and the core part of the fiber to be molded is provided with salt-sensitive hydrogel;