Equipment and process for preparing hydrophilic polyester fiber with porous structure

Abstract

The invention discloses equipment and a process for preparing hydrophilic polyester fibers with a porous structure, the equipment comprises a rack, two symmetrical cloth feeding roller racks are fixed at the front end part of the rack, and a cloth feeding roller is rotatably mounted between the two cloth feeding roller racks; the number of the calendaring and thinning mechanisms is two, and the calendaring and thinning mechanisms are the pre-thinning pressing mechanism and the thinning pressing mechanism respectively. A modification mechanism is arranged in the device, through the sensing relation between a second sensor and a first sensor, the multi-point type base injection procedure on the surface of gray fabric in a point contact mode is automatically achieved, more carboxyl hydrophilic groups can be introduced into different positions of polyester fibers, and therefore the hydrophilicity of the fiber surface is remarkably improved, and the fabric quality is improved. The hydrophilic groups can form hydrogen bonds with water molecules, so that the fiber can absorb and maintain moisture more easily, the original problem of poor hygroscopicity of the polyester fiber is effectively improved, and particularly, sweat can be quickly absorbed in a humid environment or when a human body sweats.

Description

Technical Field

[0001] The present invention specifically relates to the technical field of polyester fiber production, in particular to a device and a process for preparing hydrophilic polyester fibers with a porous structure. Background Art

[0002] Traditional polyester fibers have defects such as poor hydrophilicity and insufficient moisture absorption and breathability, which make them uncomfortable to wear. Especially during exercise and in hot environments, the sweat produced by the human body is difficult to absorb and dissipate quickly, which can easily make people feel stuffy, sticky and other discomforts. Therefore, chemical modification or physical treatment methods are used to interrupt and reorganize the groups on the surface of polyester fibers to produce hydrophilic groups. Among them, the chemical modification method has certain health hazards to the human body. Therefore, the physical treatment method has been widely used in clothing, bedding and other fields.

[0003] However, the polyester fiber production equipment currently using physical treatment methods still has the following problems: During the plasma treatment process, due to the possible unevenness in the generation and distribution of plasma, as well as the influence of factors such as the placement and movement of polyester fibers during the treatment process, it is easy to cause uneven treatment of the fiber surface, which may cause the amount of hydrophilic groups introduced on the fiber surface to deviate too much, thereby affecting the overall hydrophilicity of the fiber and the stability of its performance, and quality problems are very likely to occur during subsequent processing and use. Summary of the invention

[0004] To this end, the present invention proposes a device and process for preparing hydrophilic polyester fibers with a porous structure to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a device for preparing hydrophilic polyester fibers with a porous structure, comprising:

[0006] The frame has two symmetrical cloth-laying roller frames fixed at its front end, and a cloth-laying roller is rotatably mounted between the two cloth-laying roller frames;

[0007] Calendering and thinning mechanisms, which are provided with two, namely, a pre-thinning pressing mechanism and a thinning pressing mechanism, and both are fixed on the frame, and the pre-thinning pressing mechanism and the thinning pressing mechanism are sequentially arranged behind the cloth placing roller, and the pre-thinning pressing mechanism and the thinning pressing mechanism can successively perform calendering and thinning processes on the polyester fiber grey cloth;

[0008] And a modification mechanism, which is fixed on the frame and located between the pre-thinning pressing mechanism and the thinning pressing mechanism, can perform a hydrophilic modification process on the polyester fiber grey cloth after the first calendering and thinning process.

[0009] Further, preferably, the modification mechanism comprises:

[0010] A generating chamber, in which a plurality of gas ports connected to the gas injection mechanism are arranged;

[0011] A sprocket conveying mechanism is fixed in the generating chamber, and a plurality of base injection assemblies are equidistantly installed on the transmission chain of the sprocket conveying mechanism, and the base injection assemblies can inject base into the surface of the polyester fiber grey cloth;

[0012] There are four guide rollers, two of which are close to each other and are respectively arranged on the front and rear sides of the sprocket conveying mechanism, and each two adjacent guide rollers are rotatably mounted on an upper roller frame and a lower roller frame fixed in the generating chamber;

[0013] And two collision seats are provided and both are fixed above the sprocket type conveying mechanism.

[0014] Furthermore, preferably, the conveying speed of the sprocket conveying mechanism is always the same as the conveying speed of the polyester fiber grey cloth.

[0015] Further, as a preference, the injection base assembly is composed of an injection base, a second sensor fixed on the injection base, a plurality of push-pull cylinders, a slider, and a plasma kit, wherein a plurality of slide cavities are equidistantly arranged in the injection base, each of the slide cavities is matched with a slider, and each of the sliders is driven by a push-pull cylinder fixed on the top of the injection base, and a plasma kit is fixed on the front and rear ends of each slider;

[0016] When the distance between the second sensor and the first sensor fixed in the collision seat reaches a set sensing value, a command is issued to the push-pull cylinder to drive each plasma kit to perform a base injection action.

[0017] Further, preferably, the plasma kit comprises:

[0018] A cylinder shell, which is fixedly connected to the sliding hole of the injection base, and a partition is arranged inside the cylinder shell;

[0019] A sliding post, one end of which is fixedly connected to the sliding block, and the other end of which passes through the sliding hole and then extends into the cylinder shell;

[0020] A connecting column, one end of which is fixedly connected to the sliding column, and the other end of which passes through the partition in the cylinder shell and is then fixedly connected to the plasma generator;

[0021] A guide ring, which is fixed in the cylinder shell and is matched and slidably connected with the connecting column;

[0022] and a spring, which is arranged between the guide ring and a spring ring fixed on the connecting column and is wound around the connecting column.

[0023] Furthermore, as a preference, a first winding roller and a second winding roller arranged diagonally are rotatably installed in the generating chamber and near the input port;

[0024] A third winding roller is rotatably mounted in the generating chamber and near the output port.

[0025] Further, as a preference, the pre-thinning pressing mechanism and the thinning pressing mechanism have the same structure, wherein the thinning pressing mechanism comprises:

[0026] Two side plates are provided and symmetrically fixed on the frame, a slide groove is provided on the top of each side plate, an adjustable bearing seat is matched and slidably connected in each slide groove, and each adjustable bearing seat is driven by a support cylinder fixed on the top plate;

[0027] A heating roller 1, which is rotatably mounted between the two adjustable bearing seats, and the end of the heating roller 1 is driven by a motor 3 fixed on the adjustable bearing seat;

[0028] and a heating roller 2, of which two are provided, the two heating rollers 2 are symmetrically arranged relative to the heating roller 1, and are rotatably installed between the side plates;

[0029] Wherein, a gear is fixedly installed at the end of each heating roller, and a toothed chain is connected between the two gears;

[0030] A small synchronous wheel 2 is also fixed to the end of any one of the heating and pressing rollers 2. The small synchronous wheel 2 is connected to the large synchronous wheel 2 by a belt 2 transmission, and the large synchronous wheel 2 is fixed to the driving end of the motor 2.

[0031] Further, preferably, the distance between the heating roller 1 and the heating roller 2 in the pre-thinning mechanism is greater than the distance between the heating roller 1 and the heating roller 2 in the thinning mechanism.

[0032] Further, as a preference, a small synchronous wheel 1 is fixed to the end of the cloth placing roller, the small synchronous wheel 1 is connected to the large synchronous wheel 1 by a belt transmission, and the large synchronous wheel 1 is fixed to the driving end of the motor 1.

[0033] The present invention also provides a process for preparing a hydrophilic polyester fiber having a porous structure, which comprises the following steps:

[0034] Step 1: Wind the spun polyester fiber grey cloth on the cloth-releasing roller, and then release part of the grey cloth to pass through the pre-thinning pressing mechanism, the modifying mechanism and the thinning pressing mechanism in sequence until it is connected to the winding mechanism;

[0035] Step 2: Pre-thinning and pressing;

[0036] Specifically, the two heating rollers 2 rotate clockwise synchronously, and the heating roller 1 rotates counterclockwise synchronously, so that the heating roller 1 and the two heating rollers 2 perform two calendering and pre-film reduction processes on the grey cloth;

[0037] Step 3: hydrophilic modification treatment;

[0038] Specifically, a gas containing carboxyl groups is filled into the generating chamber. When the push-pull cylinder drives the plasma generator to move to contact the surface of the grey cloth, the chemical bonds on the surface of the grey cloth will be interrupted by the highly active particles generated by the plasma generator, generating free radical sites, thereby introducing carboxyl hydrophilic groups on the surface of the grey cloth.

[0039] Step 4: Thinning and pressing treatment;

[0040] The specific process is the same as the above steps, that is, the grey cloth is subjected to two calendering processes and then the film reduction process, and then the finished cloth is rolled up.

[0041] The present invention adopts the above technology and has the following beneficial effects compared with the existing technology: a modification mechanism is provided in the device of the present invention, and the moving end of the push-pull cylinder is automatically driven to perform a telescopic action through the inductive relationship between the second sensor and the first sensor, and then the plasma generator is driven to move out of the cylinder shell through the sliding column, so that the plasma generator and the polyester fiber are fully contacted and reacted, so as to introduce the carboxyl hydrophilic group in the gas, and in this way, a multi-point base injection process is realized on the surface of the grey cloth by a point-contact method, and more carboxyl hydrophilic groups can be introduced at different positions of the polyester fiber, thereby significantly improving the hydrophilicity of the fiber surface. These hydrophilic groups can form hydrogen bonds with water molecules, making it easier for the fiber to absorb and retain moisture, effectively improving the original poor hygroscopicity of the polyester fiber, especially in a humid environment or when the human body sweats, it can quickly absorb sweat. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic diagram of the structure of a device for preparing hydrophilic polyester fibers with a porous structure;

[0043] Figure 2 A schematic diagram of the structure of a thinning and pressing mechanism in a device for preparing hydrophilic polyester fibers with a porous structure;

[0044] Figure 3 A schematic diagram of the internal structure of a modification mechanism in a device for preparing hydrophilic polyester fibers with a porous structure;

[0045] Figure 4 The schematic diagram of the installation of the base injection component in the equipment for preparing the hydrophilic polyester fiber with porous structure;

[0046] Figure 5A schematic diagram of the internal structure of a base injection component in a device for preparing hydrophilic polyester fibers with a porous structure;

[0047] Figure 6 for Figure 5 A magnified schematic diagram of part A;

[0048] Figure 7 This is a schematic diagram of the working state of a device for preparing hydrophilic polyester fibers with a porous structure.

[0049] In the figure: 1, thinning and pressing mechanism; 2, modification mechanism; 3, pre-thinning and pressing mechanism; 4, cloth-releasing roller; 5, cloth-releasing roller frame; 6, motor 1; 7, motor 2; 8, frame; 101, adjustable bearing seat; 102, top plate; 103, support cylinder; 104, heating and pressing roller 1; 105, side plate; 106, heating and pressing roller 2; 107, gear; 108, tooth chain; 109, motor 3; 201, second winding roller; 202, input port; 203, first winding roller; 204, Upper roller frame; 205, collision seat; 206, third winding roller; 207, output port; 208, guide roller; 209, lower roller frame; 210, sprocket conveying mechanism; 211, injection base assembly; 212, plasma generator; 213, push-pull cylinder; 214, second sensor; 215, injection base; 216, slider; 217, slide cavity; 218, slide column; 219, cylinder shell; 220, spring; 221, connecting column; 222, guide ring; 223, spring ring. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] Example: Please refer to the attached Figure 1-7 The present invention provides a technical solution: a device for preparing hydrophilic polyester fibers with a porous structure, comprising:

[0052] The frame 8 has two symmetrical cloth placing roller frames 5 fixed at its front end, and a cloth placing roller 4 is rotatably mounted between the two cloth placing roller frames 5;

[0053] There are two calendering and thinning mechanisms, namely a pre-thinning pressing mechanism 3 and a thinning pressing mechanism 1, both of which are fixed on a frame 8, and the pre-thinning pressing mechanism 3 and the thinning pressing mechanism 1 are sequentially arranged behind the cloth placing roller 5, and the pre-thinning pressing mechanism 3 and the thinning pressing mechanism 1 can successively perform calendering and thinning processes on the polyester fiber grey cloth;

[0054] And the modification mechanism 2 is fixed on the frame 8 and is located between the pre-thinning mechanism 3 and the thinning mechanism 1. The modification mechanism 2 can perform a hydrophilic modification process on the polyester fiber grey cloth after the first calendering and thinning process.

[0055] In this embodiment, the modification mechanism 2 includes:

[0056] A generating chamber, in which a plurality of gas ports connected to the gas injection mechanism are arranged;

[0057] A sprocket conveying mechanism 210 is fixed in the generating chamber, and a plurality of base injection components 211 are equidistantly installed on the transmission chain of the sprocket conveying mechanism 210, and the base injection components 211 can inject base into the surface of the polyester fiber grey cloth;

[0058] Specifically, the polyester fiber is treated with plasma technology to introduce carboxyl hydrophilic groups on the fiber surface, which can cause physical and chemical changes on the fiber surface, generate active species such as free radicals and ions, and these active species react with the surrounding gas to introduce carboxyl hydrophilic groups on the fiber surface, thereby improving the hydrophilicity of the fiber;

[0059] There are four guide rollers 208, two of which are located on the front and rear sides of the sprocket conveying mechanism 210, and two adjacent guide rollers 208 are respectively installed, and each two adjacent guide rollers 208 are rotatably mounted on the upper roller frame 204 and the lower roller frame 209 fixed in the generating chamber;

[0060] And two collision seats 205 are provided and both are fixed above the sprocket type conveying mechanism 210.

[0061] In this embodiment, the conveying speed of the sprocket conveying mechanism 210 is always kept the same as the conveying speed of the polyester fiber grey cloth, so as to avoid the base injection assembly 211 from scratching the surface of the grey cloth.

[0062] In this embodiment, the injection base assembly 211 is composed of an injection base 215, a second sensor 214 fixed on the injection base 215, a plurality of push-pull cylinders 213, a slider 216, and a plasma kit, wherein a plurality of slide cavities 217 are equidistantly arranged in the injection base 215, each slide cavity 217 is matched with a slider 216, and each slider 216 is driven by a push-pull cylinder 213 fixed on the top of the injection base 215, and a plasma kit is fixed at the front and rear ends of each slider 216;

[0063] When the distance between the second sensor 214 and the first sensor fixed in the collision seat 205 reaches the set sensing value, a command is issued to the push-pull cylinder 213 to drive each plasma kit to perform a base injection action;

[0064] It should be noted that, if two collision seats 205 are provided, the base injection is performed twice on the grey cloth to ensure the success rate of the base injection.

[0065] In this embodiment, the plasma kit includes:

[0066] The cylinder shell 219 is fixedly connected to the sliding hole of the injection base 215, and a partition is arranged inside the cylinder shell 219;

[0067] A sliding post 218, one end of which is fixedly connected to the slider 216, and the other end of the sliding post 218 passes through the sliding hole and then extends into the cylinder shell 219;

[0068] A connecting column 221, one end of which is fixedly connected to the sliding column 218, and the other end of which passes through the partition in the cylinder shell 219 and is then fixedly connected to the plasma generator 212;

[0069] A guide ring 222 is fixed in the cylinder shell 219, and the guide ring 222 is matched and slidably connected with the connecting column 221;

[0070] and a spring 220, which is disposed between a guide ring 222 and a spring ring 223 fixed on a connecting post 221, and is wound around the connecting post 221;

[0071] Specifically, when the distance between the second sensor 214 and the first sensor reaches the set sensing value, the moving end of the push-pull cylinder 213 performs a telescopic action, and drives the plasma generator to move out of the cylinder shell 219 through the sliding column 218, and then makes the plasma generator fully contact and react with the polyester fiber to facilitate the introduction of carboxyl hydrophilic groups in the gas. In this way, a multi-point base injection process is implemented on the surface of the grey cloth by a point-contact method. More carboxyl hydrophilic groups can be introduced at different positions of the polyester fiber, thereby significantly improving the hydrophilicity of the fiber surface. These hydrophilic groups can form hydrogen bonds with water molecules, making it easier for the fiber to absorb and retain moisture, effectively improving the original poor hygroscopicity of the polyester fiber, especially in a humid environment or when the human body sweats, it can quickly absorb sweat.

[0072] In this embodiment, a first winding roller 203 and a second winding roller 201 arranged diagonally are rotatably installed in the generating chamber and near the input port 202;

[0073] A third winding roller 206 is rotatably mounted in the generating chamber and near the output port 207 .

[0074] In this embodiment, the pre-thinning pressing mechanism 3 and the thinning pressing mechanism 1 have the same structure, wherein the thinning pressing mechanism 1 comprises:

[0075] Two side plates 105 are provided and symmetrically fixed on the frame 8. A slide groove is provided on the top of each side plate 105. An adjustable bearing seat 101 is matched and slidably connected in each slide groove. Each adjustable bearing seat 101 is driven by a support cylinder 103 fixed on the top plate 102.

[0076] A heating roller 104 is rotatably mounted between two adjustable bearing seats 101, and the end of the heating roller 104 is driven by a motor 3 109 fixed on the adjustable bearing seats 101;

[0077] and heating roller 2 106, of which two are provided, the two heating rollers 106 are symmetrically arranged relative to the heating roller 1 104, and are rotatably installed between the side plates 105;

[0078] Among them, a gear 107 is fixedly installed at the end of each heating roller 106, and a toothed chain 108 is connected between the two gears 107;

[0079] A small synchronous wheel 2 is also fixed to the end of any heating and pressing roller 2 106 . The small synchronous wheel 2 is connected to the large synchronous wheel 2 by a belt 2 transmission, and the large synchronous wheel 2 is fixed to the driving end of the motor 2 7 .

[0080] In this embodiment, the distance between the heating roller 1 104 and the heating roller 2 106 in the pre-thinning mechanism 3 is greater than the distance between the heating roller 1 104 and the heating roller 2 106 in the thinning mechanism 1 .

[0081] In this embodiment, a small synchronous wheel 1 is fixed to the end of the cloth placing roller 4, and the small synchronous wheel 1 is connected to the large synchronous wheel 1 by a belt transmission, and the large synchronous wheel 1 is fixed on the driving end of the motor 1 6.

[0082] The present invention also provides a process for preparing a hydrophilic polyester fiber having a porous structure, which comprises the following steps:

[0083] Step 1: Wind the spun polyester fiber grey cloth on the cloth-releasing roller 4, and then release part of the grey cloth to pass through the pre-thinning pressing mechanism 3, the modifying mechanism 2 and the thinning pressing mechanism 1 in sequence until it is connected to the winding mechanism;

[0084] Step 2: Pre-thinning treatment;

[0085] Specifically, the two heated rollers 106 rotate clockwise synchronously, and the heated roller 104 rotates counterclockwise synchronously, so that the heated roller 104 and the two heated rollers 106 perform two calendering and pre-film reduction processes on the grey cloth;

[0086] Step 3: hydrophilic modification treatment;

[0087] Specifically, a gas containing carboxyl groups is filled into the generating chamber. When the push-pull cylinder 213 drives the plasma generator 212 to move to contact the surface of the grey cloth, the chemical bonds on the surface of the grey cloth will be interrupted by the highly active particles generated by the plasma generator 212, generating free radical sites, thereby introducing carboxyl hydrophilic groups on the surface of the grey cloth;

[0088] Step 4: Thinning and pressing treatment;

[0089] The specific process is the same as the above step 2, in which the grey cloth is subjected to two calendering processes and then film reduction processes, and then the finished cloth is rolled up.

[0090] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for preparing hydrophilic polyester fibers having a porous structure, characterized in that: It includes: A frame (8) having two symmetrical cloth placing roller frames (5) fixed at its front end, and a cloth placing roller (4) rotatably mounted between the two cloth placing roller frames (5); Two calendering and thinning mechanisms are provided, namely a pre-thinning pressing mechanism (3) and a thinning pressing mechanism (1), and both are fixed on the frame (8), and the pre-thinning pressing mechanism (3) and the thinning pressing mechanism (1) are arranged in sequence behind the cloth placing roller (5), and the pre-thinning pressing mechanism (3) and the thinning pressing mechanism (1) can successively perform calendering and thinning processes on the polyester fiber grey cloth; and a modification mechanism (2), which is fixed on the frame (8) and is located between the pre-thinning mechanism (3) and the thinning mechanism (1), wherein the modification mechanism (2) is capable of performing a hydrophilic modification process on the polyester fiber grey cloth after the first calendering and thinning process.

2. The device for preparing hydrophilic polyester fiber with porous structure according to claim 1, characterized in that: The modification mechanism (2) comprises: A generating chamber, in which a plurality of gas ports connected to the gas injection mechanism are arranged; A sprocket conveying mechanism (210) is fixed in the generating chamber, a plurality of base injection assemblies (211) are equidistantly mounted on a transmission chain of the sprocket conveying mechanism (210), and the base injection assemblies (211) are capable of performing base injection on the surface of the polyester fiber grey cloth; There are four guide rollers (208), two of which are close to each other and are respectively arranged on the front and rear sides of the sprocket conveying mechanism (210), and each of the two adjacent guide rollers (208) is rotatably mounted on an upper roller frame (204) and a lower roller frame (209) fixed in the generating chamber; And two collision seats (205) are provided and both are fixed above the sprocket type conveying mechanism (210).

3. The device for preparing hydrophilic polyester fiber with porous structure according to claim 2, characterized in that: The conveying speed of the sprocket type conveying mechanism (210) is always kept the same as the conveying speed of the polyester fiber grey cloth.

4. The device for preparing hydrophilic polyester fiber with porous structure according to claim 3, characterized in that: The injection base assembly (211) is composed of an injection base (215), a second sensor (214) fixed on the injection base (215), a plurality of push-pull cylinders (213), a slider (216), and a plasma kit, wherein a plurality of slide cavities (217) are equidistantly arranged in the injection base (215), a slider (216) is matched in each slide cavity (217), and each slider (216) is driven by a push-pull cylinder (213) fixed on the top of the injection base (215), and a plasma kit is fixed to the front and rear ends of each slider (216); When the distance between the second sensor (214) and the first sensor fixed in the collision seat (205) reaches a set sensing value, a command is issued to the push-pull cylinder (213) to drive each plasma kit to perform a base injection action.

5. The device for preparing hydrophilic polyester fiber with porous structure according to claim 4, characterized in that: The plasma kit includes: A cylinder shell (219) is fixedly connected to the sliding hole of the injection base (215), and a partition is provided inside the cylinder shell (219); A sliding column (218), one end of which is fixedly connected to the sliding block (216), and the other end of the sliding column (218) passes through the sliding hole and then extends into the cylindrical shell (219); A connecting column (221), one end of which is fixedly connected to the sliding column (218), and the other end of which passes through the partition in the cylindrical shell (219) and is then fixedly connected to the plasma generator (212); A guide ring (222) is fixed in the cylindrical shell (219), and the guide ring (222) is matched and slidably connected with the connecting column (221); and a spring (220), which is arranged between the guide ring (222) and a spring ring (223) fixed on the connecting column (221), and is wound around the connecting column (221).

6. The device for preparing hydrophilic polyester fiber with porous structure according to claim 5, characterized in that: A first winding roller (203) and a second winding roller (201) arranged diagonally are rotatably installed in the generating chamber and near the input port (202); A third winding roller (206) is rotatably mounted in the generating chamber and near the output port (207).

7. The device for preparing hydrophilic polyester fiber with porous structure according to claim 1, characterized in that: The pre-thinning pressing mechanism (3) and the thinning pressing mechanism (1) have the same structure, wherein the thinning pressing mechanism (1) comprises: Two side plates (105) are provided and symmetrically fixed on the frame (8); a slide groove is provided on the top of each side plate (105); an adjustable bearing seat (101) is slidably connected in each slide groove; and each adjustable bearing seat (101) is driven by a support cylinder (103) fixed on the top plate (102); A heating pressure roller (104) is rotatably mounted between the two adjustable bearing seats (101), and an end of the heating pressure roller (104) is driven by a motor (109) fixed on the adjustable bearing seats (101); and a second heating roller (106), of which two are provided, the two second heating rollers (106) being symmetrically arranged relative to the first heating roller (104) and rotatably mounted between the side plates (105); Wherein, a gear (107) is fixedly mounted on the end of each heating and pressing roller (106), and a toothed chain (108) is transmission-connected between the two gears (107); A small synchronous wheel 2 is also fixed to the end of any one of the heating rollers 2 (106), the small synchronous wheel 2 is connected to the large synchronous wheel 2 by a belt transmission, and the large synchronous wheel 2 is fixed to the driving end of the motor 2 (7).

8. The device for preparing hydrophilic polyester fiber with porous structure according to claim 7, characterized in that: The distance between the first heating roller (104) and the second heating roller (106) in the pre-thinning mechanism (3) is greater than the distance between the first heating roller (104) and the second heating roller (106) in the thinning mechanism (1).

9. The device for preparing hydrophilic polyester fiber with porous structure according to claim 1, characterized in that: A small synchronous wheel 1 is fixed to the end of the cloth placing roller (4), the small synchronous wheel 1 is connected to a large synchronous wheel 1 by a belt transmission, and the large synchronous wheel 1 is fixed to the driving end of a motor 1 (6).

10. A process for preparing hydrophilic polyester fiber with a porous structure, characterized in that: It includes the following steps: Step 1: Winding the spun polyester fiber grey fabric onto a fabric feeding roller (4), then feeding a portion of the grey fabric through a pre-thinning press mechanism (3), a modification mechanism (2), and a thinning press mechanism (1) in sequence until it is connected to a winding mechanism; Step 2: Pre-thinning treatment; Specifically, the two heated pressing rollers 2 (106) rotate clockwise synchronously, and the heated pressing roller 1 (104) rotates counterclockwise synchronously, so that the heated pressing roller 1 (104) and the two heated pressing rollers 2 (106) perform two calendering and pre-film reduction processes on the grey cloth; Step 3: hydrophilic modification treatment; Specifically, a gas containing carboxyl groups is filled into the generating chamber, and when the push-pull cylinder (213) drives the plasma generator (212) to move to contact the surface of the grey cloth, the chemical bonds on the surface of the grey cloth are interrupted by the highly active particles generated by the plasma generator (212), generating free radical sites, thereby introducing carboxyl hydrophilic groups on the surface of the grey cloth; Step 4: Thinning and pressing treatment; The specific process is the same as the above step 2, in which the grey cloth is subjected to two calendering steps and then film reduction steps, and then the finished cloth is rolled up.

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