Nonwoven fabric with cross structure, weaving mechanism, weaving system and weaving method

Abstract

The present invention relates to a non-woven fabric with a cross structure, a weaving mechanism, a weaving system, and a weaving method, and belongs to the field of textile technology. The weaving mechanism includes: a spinning unit, a fiber receiving unit, and a non-woven fabric winding unit. The fiber receiving unit can rotate around its own central axis, and the spinning unit is arranged on one side of the fiber receiving unit and can reciprocate along the direction of the fiber receiving unit's rotation axis. The fiber receiving unit rotates around its own central axis to achieve fiber drafting and orientation, thereby improving the fiber tensile strength and elongation at break. The spinning unit reciprocates along the direction of the fiber receiving unit's rotation axis to form a tightly connected cross structure in the non-woven fabric, thereby improving the tensile strength of the non-woven fabric and improving the problems of poor fiber orientation and low strength of the non-woven fabric existing in existing melt-blown and spunbond non-woven fabrics.

Description

Technical Field

[0001] The present invention relates to the field of textile technology, and in particular to a non-woven fabric with a cross structure, a textile mechanism, a textile system and a textile method. Background Art

[0002] Compared with the traditional weaving process (whether it is short-filament spinning and weaving or long-filament weaving), the non-woven fabric preparation process has the advantages of relatively simple procedures, short process flow, and low hardware equipment investment. At the same time, it reduces the use of various oils in the traditional weaving process, has little environmental pollution, low cost, and is suitable for large-scale production.

[0003] There are many production processes for non-woven fabrics, which can be divided into two main categories. The first category is direct fiber web formation, such as meltblowing, spunbond, air-spinning, centrifugal spinning, and flash steaming. The second category is to first produce short fibers, which are then combed into a web. According to different web-fixing methods, it can be further divided into needle punching, hydroentanglement, hot rolling, hot air, etc.

[0004] The first type is that the spinning speed during the fiber production process is very fast, reaching hundreds or even thousands of meters per minute, and the fiber receiver (drum or mesh curtain, etc.) cannot move so fast to receive the ejected fibers, resulting in the fibers being randomly arranged without orientation, and even curled and piled up without straightening, resulting in low strength utilization. Specifically, Figure 1a-Figure 1c A typical spinning method in the prior art is disclosed: the fiber receiving unit 02 receives the new yarn produced by the spinning unit 01 and moves forward to form a spiral yarn 001 on the surface; the spinning unit 01 reciprocates perpendicular to the fiber receiving unit 02, and the spiral yarns are randomly stacked and distributed; the spinning unit 01 is provided with multiple spinnerets 003, and the spiral yarns formed by each spinneret are randomly stacked and distributed.

[0005] The second type, short fibers, undergo stretching during the production process, which orients the molecular chains within the fibers and increases fiber strength. At the same time, the short fibers undergo carding and cross-lamination, resulting in fully oriented fibers and a relatively higher strength nonwoven fabric. However, this process is lengthy and costly, as the fibers are packaged at the fiber factory and then transported to the nonwovens factory. The process involves unpacking, opening, loosening, carding, laying, and fixing the webs, and various oils must be used in each step of the production process.

[0006] Therefore, the first type of process has high production efficiency and low cost, but the non-woven fabric performance is not ideal; while the second type of process has relatively high mechanical properties of the non-woven fabric, but the cost is high. The market urgently needs to improve the performance of existing non-woven fabrics and improve the non-woven fabric process. Summary of the Invention

[0007] In view of the above analysis, the present invention aims to provide a non-woven fabric, a textile structure, a textile system and a textile method with a cross structure, so as to solve one of the problems existing in the prior art of non-woven fabric preparation, such as poor fiber orientation, low strength of the formed non-woven fabric and high cost.

[0008] The purpose of the present invention is mainly achieved through the following technical solutions:

[0009] A spinning mechanism, comprising: a spinning unit, a fiber receiving unit;

[0010] The fiber receiving unit can rotate around its own central axis, and the spinning unit is arranged on one side of the fiber receiving unit and can reciprocate in a direction parallel to the rotating axis of the fiber receiving unit.

[0011] Preferably, the spinning unit is an airflow-assisted solution spinning unit, a melt-blowing spinning unit, a melt-filament spinning unit, or a solution or melt electrospinning unit.

[0012] A textile system, the textile system further comprising: a non-woven fabric receiving unit; the non-woven fabric receiving unit comprising: a bracket, a non-woven fabric traction roller and a non-woven fabric winding roller;

[0013] The bracket is coaxially arranged with the fiber receiving unit, one end of the fiber receiving unit is suspended and fixed, and the other end is coaxially locked with the bracket in a non-contact manner, and can rotate coaxially and at the same speed as the bracket;

[0014] The non-woven fabric winding roller is arranged on a side where the fiber receiving unit is connected to the bracket. The central axis of the non-woven fabric winding roller is fixed to the bracket and can rotate relative to its central axis.

[0015] Preferably, the fiber receiving unit is connected to the bracket by magnetic force, and the end portion of the fiber receiving unit on the side connected to the bracket enters the interior of the bracket, so that the fiber receiving unit and the bracket rotate coaxially without contact.

[0016] Preferably, a second magnetic structure is provided on one side of the fiber receiving unit connected to the bracket; the second magnetic structure forms an annular magnetic field surrounding the fiber receiving unit.

[0017] Preferably, the bracket is provided with a first magnetic structure in the circumferential direction on a side connected to the fiber receiving unit.

[0018] Preferably, the first magnetic structure and the second magnetic structure are axial synchronous magnetic coupling structures.

[0019] A weaving method for a cross-structured fabric, comprising:

[0020] A non-woven fabric with a cross structure is prepared based on a fiber receiving unit which can rotate circumferentially around its own central axis and a spinning unit whose rotating shaft moves back and forth.

[0021] A one-step direct fiber cross-web forming method includes the above-mentioned weaving method of the non-woven fabric with a cross structure, and further includes:

[0022] The bracket and the fiber receiving unit rotate concentrically around the central axis;

[0023] The non-woven fabric is unloaded and wound from the fiber receiving roller through the traction of the non-woven fabric traction roller.

[0024] A non-woven fabric with a cross structure is prepared by the above method, wherein the non-woven fabric comprises a cross structure.

[0025] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0026] (1) The present invention provides a high linear velocity on the surface of the receiving roller through the high-speed rotation of the fiber receiving unit, thereby providing a stretching effect on the nascent fibers ejected from the micropores of the spinning unit, so that the microscopic molecular chains in the fibers are oriented and stretched, thereby improving the strength and elongation at break of the fibers, which is beneficial to improving the mechanical properties of non-woven fabric products.

[0027] (2) The present invention not only orients the microscopic molecular chains inside the fibers through stretching, but also straightens the fibers macroscopically, and no longer piles up disorderly or even curls up; at the same time, the ordering and orientation greatly improve the strength conversion rate of the fibers, thereby improving the mechanical properties of the non-woven fabric products.

[0028] (3) The present invention controls parameters such as the spinneret extrusion speed and the distance between the spinneret unit and the fiber receiving unit surface through process adjustment, thereby ensuring that the nascent fibers are not completely solidified when attached to the fiber receiving unit surface and have a certain viscosity, ensuring that the upper and lower layers of fibers can adhere to each other at the cross-contact points, playing the role of fixing the network and improving the strength of the non-woven fabric product.

[0029] (4) The present invention provides a spinning unit with reciprocating motion and a fiber receiving unit with axial rotational motion. The combination of these two motions allows the fibers to be arranged in the fabric to form a winding angle. A cross structure is formed between the upper and lower fiber layers. At the same time, under the traction of the nonwoven fabric traction roller, the nonwoven fabric is stretched longitudinally, and its winding angle is correspondingly expanded, thereby reducing the anisotropy of the mechanical properties of the nonwoven fabric. In other words, the mechanical uniformity of the nonwoven fabric product is improved.

[0030] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages may become obvious from the description or be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like parts throughout the drawings.

[0032] Figure 1a-Figure 1c It is a schematic diagram of the silk-forming process in the prior art;

[0033] Figure 2 Schematic diagram of single filament formation on the surface of the fiber receiving unit when the spinning unit is stationary in one embodiment of the present invention;

[0034] Figure 3 Schematic diagram of the surface of the fiber receiving unit when the spinning unit periodically oscillates in one embodiment of the present invention;

[0035] Figure 4a Schematic diagram of an electrospinning process in one embodiment of the present invention;

[0036] Figure 4b A schematic diagram of a melt-blown spinning process in one embodiment of the present invention;

[0037] Figure 4c Schematic diagram of the spunbond spinning process in one embodiment of the present invention;

[0038] Figure 5 This is a front view of a textile system in one embodiment of the process of the present invention;

[0039] Figure 6 A side view of a one-step weaving system in accordance with one embodiment of the process of the present invention is shown;

[0040] Figure 7 A top view of a textile system in one embodiment of the process of the present invention;

[0041] Figure 8 for Figure 6 Partial enlarged view;

[0042] Figure 9 for Figure 8 Schematic diagram of the top view of the axial magnetic coupling structure.

[0043] Reference numerals:

[0044] A single filament is formed into a yarn 001 on the surface of the fiber receiving unit, another single filament is formed into a yarn 001' on the surface of the fiber receiving unit, a cross structure 002, and a spinning nozzle 003;

[0045] Spinning unit 01, fiber receiving unit 02, non-woven fabric receiving unit 03;

[0046] Support 301, non-woven fabric pulling roller 302, non-woven fabric winding roller 303;

[0047] First power unit 02a, second power unit 04a, fourth power unit 05a;

[0048] The first magnetic structure 0301 and the second magnetic structure 0201. DETAILED DESCRIPTION

[0049] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0050] In one aspect, the present invention discloses a weaving mechanism, such as Figure 5-Figure 7 As shown, it includes: a spinning unit 01, a fiber receiving unit 02;

[0051] The fiber receiving unit 02 can rotate around its own central axis. The spinning unit 01 is arranged on one side of the fiber receiving unit 02 and can reciprocate in a direction parallel to the rotation axis of the fiber receiving unit 02.

[0052] Preferably, the fiber receiving unit 02 is cylindrical and can rotate around its own central axis.

[0053] When implementing, if Figure 2 As shown, the original fiber produced by the spinning unit 01 is attached to the side of the fiber receiving unit 02. While the spinning unit 01 is spinning, the side of the fiber receiving unit 02 rotates relative to its own central axis, and the filaments are formed radially along the fiber receiving unit 02 and radially attached to the side of the fiber receiving unit 02. At the same time, under the action of the side rotation of the fiber receiving unit 02, the filaments on the fiber receiving unit 02 are pulled to achieve orientation; at the same time, the spinning unit 01 spins, and the filaments are formed axially along the fiber receiving unit 02, and the filaments are axially attached to the side of the fiber receiving unit 02; at the same time, under the action of the radial rotation of the fiber receiving unit 02, the filaments are radially attached to the side of the fiber receiving unit 02, and oriented nearly straight filaments are formed on the side of the fiber receiving unit 02.

[0054] As the spinning unit 01 reciprocates, the filaments extend from one end face of the fiber receiving unit 02 to the other end face, and then turn back as the spinning unit 01 reciprocates. Figure 3 As shown, the monofilaments form wavy filament fibers.

[0055] The fiber receiving unit is preferably machined with a closed bottom and perforated plates on the sides, with a diameter of 1-5 mm and a spacing of 2-20 mm. The drive shaft is machined to be hollow and connected to the vacuum system to accelerate the adhesion of the raw fibers ejected from the spinneret 01 to the sides of 02. The hollow shaft is also connected to the motor via a chain plate.

[0056] Furthermore, after the fiber receiving unit 02 rotates one circle, a single filament 001 on the surface of the fiber receiving unit and another single filament 001' on the surface of the fiber receiving unit form a cross structure 002, thereby forming a fabric with a cross structure on the side of the fiber receiving unit 02.

[0057] Specifically, the spinning unit 01 may be an airflow-assisted solution spinning unit, a melt-blowing spinning unit, a melt-filament spinning unit, or a solution or melt electrostatic spinning unit.

[0058] A specific implementation method, such as Figure 4a As shown, the spinning unit 01 can be an electrostatic spinning unit that realizes horizontal spinning under the action of an electric field.

[0059] A specific implementation method, such as Figure 4b As shown, the spinning unit 01 can be a melt-blown spinning unit that realizes horizontal spinning under the action of airflow.

[0060] A specific implementation method, such as Figure 4c As shown, the spinning unit 01 can be a spunbond spinning unit that realizes vertical spinning under the action of gravity.

[0061] During implementation, the fiber precursors produced by the spinning unit 01 are attached to the outer side of the fiber receiving unit 02, and are pulled to form oriented fiber precursors under the rotation of the fiber receiving unit 02; at the same time, due to the reciprocating motion of the spinning unit 01, the fiber precursors and the fiber receiving unit 02 rotate for one or more weeks and then the fiber precursors are bonded to form a single-layer or multi-layer cross structure.

[0062] It should be noted that by controlling the temperature, the fiber strands on the surface of the fiber receiving unit 02 are not completely cooled, and the fiber strands have good adhesion, so that the fiber strands formed on the surface of the fiber receiving unit 02 at different times are cross-bonded, thereby forming a good fabric with a cross structure.

[0063] Compared with the prior art, the present invention realizes the orientation of the fibers produced by the spinning unit through the radial rotation of the fiber receiving unit, thereby improving the tensile strength and elongation at break of the fibers and making them less likely to break when subjected to external force; further, a tightly connected cross structure is formed in the fabric through the reciprocating motion of the spinning unit in the axial direction of the fiber receiving unit, thereby further improving the tensile strength and tear resistance in both the transverse and longitudinal directions and improving the anisotropic ability.

[0064] Compared with the existing technology, the present invention not only orients the microscopic molecular chains inside the fibers through fiber stretching, but also straightens the fibers macroscopically, and no longer piles up disorderly or even curls up; at the same time, the strength conversion rate of the fibers is greatly improved, thereby improving the mechanical properties of non-woven products.

[0065] About the cross structure angle α

[0066] The angle α in the cross structure satisfies: α=2arctan(w / v), where v is the reciprocating motion speed of the spinning unit 01, w is the rotational linear speed of the fiber receiving unit 02, and v satisfies v=W / 0.5T1, where W is the reciprocating motion width of the spinning unit 01 or the width of the side filament forming area of ​​the fiber receiving unit 02.

[0067] It is understood that the direction and magnitude of the resultant velocity are related to the component velocity. The angle between the resultant velocity of the yarn-forming motion and the axial direction of the fiber receiving unit 02 is arctan(w / v) or π-arctan(w / v), which is then used to calculate the angle α between the two intersecting fiber lines in the intersecting structure. It should be noted that when arctan(w / v) is greater than 90 degrees, α is taken as π-arctan(w / v).

[0068] It is understandable that the different crossing angles of the cross structure in the fabric have a significant impact on the tear strength of the fabric at different angles: the tear resistance is strongest in the direction parallel to the fiber arrangement, and the tear resistance is weakest in the direction perpendicular to the fiber arrangement. By setting a cross structure, the anisotropy of the tear strength of the fabric can be improved.

[0069] Compared with the prior art, the present invention controls the reciprocating motion speed of the spinning unit 01 and the rotational linear speed of the fiber receiving unit 02 to prepare fabrics 06 with different crossing angles, thereby adjusting the mechanical properties of the fabric (such as shear strength and tear strength at different angles) to meet different needs; similar to the textile fabric with a warp and weft structure in the prior art, the tear resistance at all angles can be relatively balanced, overcoming the defect of poor tear resistance in all directions of existing non-woven fabrics.

[0070] Preferably, if Figure 3 As shown in the figure, when the fabric is not subjected to the traction force when unloading, the initial cross angle of the cross structure is 3 to 7 degrees; it can be understood that, on the one hand, the specific range of the cross angle of the cross structure cannot be given due to problems such as the rotation speed of the winding roller and the surface roughness of the fiber receiving unit; on the other hand, while the fabric is being formed in the fiber receiving unit, it needs to be pulled by the non-woven fabric traction roller to complete the unloading and thus realize continuous production. When the non-woven fabric is subjected to the traction force of unloading, the shape of the cross structure changes and the cross angle increases.

[0071] In another aspect, the present invention discloses a method for weaving a fabric having a cross structure, comprising:

[0072] A non-woven fabric with a cross structure is prepared based on a fiber receiving unit which can rotate circumferentially around its own central axis and a spinning unit whose rotating shaft moves back and forth.

[0073] Specifically, the method of textile forming includes:

[0074] Directional stretching of fibers: The fiber strands produced by the spinning unit are attached to the fiber receiving unit and are pulled, oriented, and formed as the fiber receiving unit rotates radially.

[0075] The fiber precursors cross to form a cross structure: based on the rotation of the fiber receiving unit and the reciprocating motion of the spinneret unit parallel to the rotating shaft of the fiber receiving unit, the original fiber precursors and the newly generated fiber precursors at the same position on the surface of the fiber receiving unit form a cross structure.

[0076] Specifically, the cross-structure formed by the cross-fiber filaments includes:

[0077] The cross structure angle α is adjusted based on the reciprocating speed of the spinning unit and the rotational linear speed of the fiber receiving unit.

[0078] Specifically, adjusting the intersection angle α of the cross structure formed by the intersection of the fiber filaments includes:

[0079] Adjust the ratio of the rotational linear velocity w of the fiber receiving unit 02 to the reciprocating motion velocity v of the spinning unit 01 so that the angle α in the cross structure changes, and α satisfies: α = 2arctan(w / v); v satisfies: v = W / 0.5T1, where W is the reciprocating motion width of the spinning unit or the width of the side silk-forming area of ​​the fiber receiving unit.

[0080] Specifically, w can be selected from 6.67 to 26.67 m / s, within which the stability of the equipment and the good matching of each step can be achieved.

[0081] Preferably, the initial crossing angle of the crossing structure is 3 to 7 degrees.

[0082] Specifically, the spinning unit has a spinning amount of 0.5 ml / h to 5 ml / h, and a melt flow rate of 300 g / 10 min to 1200 g / 10 min.

[0083] On the other hand, the present invention discloses a textile system, comprising: a spinning unit 01, a fiber receiving unit 02;

[0084] The fiber receiving unit 02 can rotate around its own central axis, and the spinning unit 01 is arranged on one side of the fiber receiving unit 02 and can reciprocate parallel to the rotating axis of the fiber receiving unit 02.

[0085] Preferably, the fiber receiving unit 02 is cylindrical and can rotate around its own central axis.

[0086] During the implementation, the original fiber produced by the spinning unit 01 is attached to the side of the fiber receiving unit 02. While the spinning unit 01 is spinning, the side of the fiber receiving unit 02 rotates relative to its own central axis, and the filaments are formed along the rotation direction of the side of the fiber receiving unit 02 and attached to the side of the fiber receiving unit 02 in the rotation direction. At the same time, under the action of the side rotation of the fiber receiving unit 02, the spindles on the fiber receiving unit 02 are pulled to achieve orientation. Figure 2 As shown, oriented filament fibers are formed.

[0087] Furthermore, if Figure 3 As shown, under the reciprocating motion of the spinning unit 01, the filament extends from one end face of the fiber receiving unit 02 to the other end face, and then turns back as the spinning unit 01 changes direction during the reciprocating motion. After the filament fiber rotates one circle with the fiber receiving unit 02, a single filament 001 on the surface of the fiber receiving unit and another single filament 001' on the surface of the fiber receiving unit form a cross structure 002 on the surface of the fiber receiving unit, and then a fabric with a cross structure is formed on the side of the fiber receiving unit 02.

[0088] For example, Figure 1a-Figure 1c As shown, in the conventional meltblown process, a single filament 001 on the surface of the fiber receiving unit and another single filament 001' on the surface of the fiber receiving unit are disorderly stacked or even curled on the side of the fiber receiving unit 02; and as shown in FIG. Figure 2 As shown in the present invention, the fiber receiving unit 02 rotates at high speed so that a single filament 001 on the surface of the fiber receiving unit and another single filament 001 ′ on the surface of the fiber receiving unit are orderly and oriented.

[0089] Specifically, the spinning unit 01 may be a solution spinning unit, a melt-blowing spinning unit, a melt-filament spinning unit, or a solution or melt electrostatic spinning unit.

[0090] During implementation, the fiber precursors produced by the spinning unit 01 are attached to the outer side of the fiber receiving unit 02, and are pulled to form oriented fiber precursors under the rotation of the fiber receiving unit 02; at the same time, due to the reciprocating motion of the spinning unit 01, the fiber precursors and the fiber receiving unit 02 rotate for one or more weeks and then the fiber precursors are bonded to form a single-layer or multi-layer cross structure.

[0091] It should be noted that by controlling the temperature, the fiber strands on the surface of the fiber receiving unit 02 are not completely cooled, and the fiber strands have good adhesion, so that the fiber strands formed on the surface of the fiber receiving unit 02 at different times are cross-bonded, thereby forming a good fabric with a cross structure.

[0092] Compared with the prior art, the present invention realizes the orientation of the fibers produced by the spinning unit by rotating the fiber receiving unit around its own central axis, thereby improving the tensile strength and elongation at break of the fibers and making them less likely to break when subjected to external force; further, a tightly connected cross structure is formed in the fabric by the reciprocating motion of the spinning unit in the axis of rotation of the fiber receiving unit, thereby further improving the tensile strength and tear resistance in both the transverse and longitudinal directions.

[0093] Specifically, the textile system also includes a nonwoven receiving unit 03, which includes a bracket 301, a nonwoven traction roller 302, and a nonwoven take-up roller 303. The nonwoven receiving unit is located at the lower end of the fiber receiving unit. The nonwoven receiving unit 03 is fixed to an external device via a bearing at the bottom of the bracket 301 and can rotate coaxially with the fiber receiving unit 02.

[0094] A feasible implementation method is as follows: Figure 6-Figure 7 As shown, the bracket 301 is coaxially arranged with the fiber receiving unit 02; one end of the fiber receiving unit 02 is suspended and fixed, and is coaxially locked with the bracket 301 in a non-contact manner, and can rotate coaxially with the bracket 301;

[0095] The non-woven fabric winding roller 303 is arranged on the side where the fiber receiving unit 02 is connected to the bracket 301. The central axis of the non-woven fabric winding roller 303 is fixed to the bracket 301 and can rotate relative to its own central axis.

[0096] During implementation, the bracket 301 rotates coaxially with the fiber receiving unit 02, and the fabric on the side where the fiber receiving unit 02 is connected to the bracket 301 is separated from the fiber receiving unit 02 under the rotation and traction of the non-woven fabric winding roller 303, and the fabric is wound up on the non-woven fabric winding roller 303.

[0097] Preferably, the fiber receiving unit 02 is connected to the bracket 301 by magnetic force, and the end portion of the fiber receiving unit 02 on the side connected to the bracket 301 enters the inside of the bracket 301, so that the fiber receiving unit 02 and the bracket 301 rotate coaxially without contact.

[0098] Preferably, the fiber receiving unit 02 and the bracket 301 rotate at the same angular velocity, and the two are relatively stationary under the action of the magnetic field.

[0099] During implementation, the fiber receiving unit 02 is relatively stable relative to the bracket 301 under the action of magnetic force without contact, thereby realizing a coaxial connection between the fiber receiving unit 02 and the bracket 301; at the same time, the fabric on the side where the fiber receiving unit 02 is connected to the bracket 301 can be evenly detached along the circumference of the fiber receiving unit 02 under the traction of the non-woven fabric winding roller 303 without contacting the bracket 301.

[0100] Compared with the existing technology, the fiber receiving unit 02 and the non-woven fabric winding roller bracket 301 are coaxially connected through magnetic force, which avoids the interference of the physical connection on the fabric entering the bracket 301 and being wound by the non-woven fabric winding roller 303; at the same time, the magnetic coaxial connection realizes the stability of the rotation of the fiber receiving unit 02 and the bracket 301 around their own central axis.

[0101] It should be noted that rotation requires at least two fixed support points on the rotating shaft to achieve stable rotation; a single fixed support point will cause violent shaking of the rotation on the side away from the fixed support point; the magnetic coaxial connection between the fiber receiving unit 02 and the bracket 301 can achieve coaxial and stable rotation of the two.

[0102] Specifically, if Figure 8-Figure 9 As shown, a second magnetic structure 0201 is provided on one side of the fiber receiving unit 02 connected to the bracket 301 ; the second magnetic structure 0201 forms a circular magnetic field around the fiber receiving unit 02 .

[0103] During implementation, when the fiber receiving unit 02 rotates, the annular magnetic field drives the bracket 301 to rotate in the same direction.

[0104] Specifically, the bracket 301 is circumferentially provided with a first magnetic structure 0301 on the side connected to the fiber receiving unit 02 ; the first magnetic structure 0301 is affected by the magnetic field provided by the second magnetic structure 0201 , so that the bracket 301 rotates as the fiber receiving unit 02 rotates.

[0105] Preferably, the first magnetic structure 0301 and the second magnetic structure 0201 are axially synchronized magnetic coupling structures. One end of the fiber receiving unit 02 is suspended and connected to the motor, while the other end forms a magnetic coupler with the nonwoven fabric winding roller. The second magnetic structure 0201 is the active end of the magnetic coupler, while the first magnetic structure 0301 is the passive end.

[0106] Preferably, if Figure 8-Figure 9 As shown, the active end and the driven end of the magnetic coupler are provided with adjacent magnetic pole blocks arranged in an annular manner with opposite magnetic field directions. There are multiple magnetic pole blocks to form an annular magnetic field.

[0107] Specifically, the pole piece is made of paramagnetic material, electromagnetic material or permanent magnet material.

[0108] About the cross structure angle α

[0109] When the winding cycle T3 of the non-woven fabric winding roller 303 is much larger than the rotation cycle T2 of the fiber receiving unit 02, the influence of the winding of the non-woven fabric winding roller 303 on the cross structure can be ignored, and the angle α in the cross structure satisfies: α = 2arctan(w / v), where v is the reciprocating motion speed of the spinning unit 01, w is the rotational linear speed of the fiber receiving unit 02, and v satisfies v = W / 0.5T1, and W is the reciprocating motion width of the spinning unit 01 or the width of the side filament forming area of ​​the fiber receiving unit 02.

[0110] It is understood that the direction and magnitude of the resultant velocity are related to the component velocity. The angle between the resultant velocity of the yarn-forming motion and the axial direction of the fiber receiving unit 02 is arctan(w / v) or π-arctan(w / v), which is then used to calculate the angle α between the two intersecting fiber lines in the intersecting structure. It should be noted that when arctan(w / v) is greater than 90 degrees, α is taken as π-arctan(w / v).

[0111] It is understandable that the different crossing angles of the cross structure in the fabric have a significant impact on the tear strength of the fabric at different angles: the tear resistance in the parallel fiber direction is the weakest, and the tear resistance in the perpendicular fiber direction is the strongest. By setting a cross structure, the tear resistance of the fabric at various angles can be improved, making it more balanced.

[0112] Compared with the prior art, the present invention controls the reciprocating motion speed of the spinning unit 01 and the rotational linear speed of the fiber receiving unit 02 to prepare fabrics 06 with different crossing angles, thereby adjusting the mechanical properties of the fabric (such as shear strength and tear strength at different angles) to meet different needs; similar to the textile fabric with a warp and weft structure in the prior art, the tear resistance at all angles can be relatively balanced, overcoming the defect of poor tear resistance in all directions of existing non-woven fabrics.

[0113] Specifically, the crossing angle of the crossing structure is 3 to 7 degrees.

[0114] During implementation, the auxiliary material drawing method in this field can be used to first pull out the fabric on the fiber receiving unit 02 at the bottom end of the fiber receiving unit 02 until the fabric fits the side wall of the non-woven fabric winding roller 303; then, under the action of the rotation of the non-woven fabric winding roller 303 itself, the fabric is wound up and traction is provided for the fabric on the fiber receiving unit 02.

[0115] Preferably, a cooling device is provided on the side where the bracket 301 is connected to the fiber receiving unit 02 .

[0116] During implementation, the cooling device adjusts the temperature to promote the cooling of the fabric at that location, so that the fabric can be separated from the fiber receiving unit 02 under the traction of the non-woven fabric winding roller 303 after cooling and forming.

[0117] Preferably, a desorption device is provided on the side of the cooling device close to the fiber receiving unit 02 .

[0118] During implementation, the desorption device can take measures such as heating and vacuuming to promote the volatilization and removal of residual spinning solvent in the fabric.

[0119] Preferably, in order to cooperate with the desorption device to remove the spinning solvent, through holes are provided on both end surfaces of the fiber receiving unit 02, so that the central axis and the desorption device can be vacuumed.

[0120] Specifically, a first power device 02a is provided on a side of the fiber receiving unit 02 away from the bracket 301 to provide power for the fiber receiving unit 02 to rotate around its own central axis.

[0121] Specifically, if Figure 5-Figure 6 As shown, the textile system also includes a non-woven fabric pulling roller 302, which is fixed inside the bracket 301 and can rotate circumferentially around its own central axis; the non-woven fabric pulling roller 302 is arranged between the fiber receiving unit 02 and the non-woven fabric winding roller 303, and includes two rollers arranged parallel to the axis of its own rotating shaft.

[0122] During implementation, the two rollers are controlled to rotate in opposite directions, the fabric on one end face of the fiber receiving unit 02 connected to the bracket 301 is guided, the hollow cylindrical fabric is introduced into the gap between the two rollers and pressed into a double-layer fabric, and the double-layer fabric is wound up by the non-woven fabric winding roller 303; by controlling the reverse rotation speed of the two rollers, more precise control of the detachment speed of the fabric on the fiber receiving unit 02 can be achieved.

[0123] Specifically, if Figure 5-Figure 6 As shown, the textile system further includes a second power device 04a and a fourth power device 05a;

[0124] The second power device 04a is matched with two non-woven fabric traction rollers 302. The two non-woven fabric traction rollers 302 rotate in opposite directions under the action of the second power device 04a. The cloth 06 moves through the non-woven fabric traction rollers 302 to the non-woven fabric winding roller 303 under the drive of the traction rollers.

[0125] The fourth power device 05a is provided at one end of the non-woven fabric winding roller 303 to provide power for the rotation of the non-woven fabric winding roller 303 .

[0126] In another aspect, the present invention discloses a method for weaving a fabric having a cross structure, comprising:

[0127] A non-woven fabric with a cross structure is prepared based on a fiber receiving unit which can rotate circumferentially around its own central axis and a spinning unit whose rotating shaft moves back and forth.

[0128] Specifically, the method of textile forming includes:

[0129] Directional stretching of fibers: The fiber strands produced by the spinning unit are attached to the fiber receiving unit, and as the fiber receiving unit rotates around its own central axis, they are pulled, oriented, and formed.

[0130] The fiber precursors cross to form a cross structure: based on the rotation of the fiber receiving unit and the reciprocating motion of the spinneret unit parallel to the rotating shaft of the fiber receiving unit, the original fiber precursors and the newly generated fiber precursors at the same position on the surface of the fiber receiving unit form a cross structure.

[0131] Specifically, the cross-structure formed by the cross-fiber filaments includes:

[0132] The cross structure angle α is adjusted based on the reciprocating speed of the spinning unit and the rotational linear speed of the fiber receiving unit.

[0133] Specifically, adjusting the intersection angle α of the cross structure formed by the intersection of the fiber filaments includes:

[0134] Adjust the ratio of the rotational linear velocity w of the fiber receiving unit 02 to the reciprocating motion velocity v of the spinning unit 01 so that the angle α in the cross structure changes, and α satisfies: α = 2arctan(w / v); v satisfies: v = W / 0.5T1, where W is the reciprocating motion width of the spinning unit or the width of the side silk-forming area of ​​the fiber receiving unit.

[0135] Specifically, w can be selected from 6.67 to 26.67 m / s, within which the stability of the equipment and the good matching of each step can be achieved.

[0136] Specifically, the initial crossing angle of the cross structure is 3 to 7 degrees; it can be understood that, on the one hand, the specific range of the crossing angle of the cross structure cannot be given due to issues such as the rotation speed of the winding roller and the surface roughness of the fiber receiving unit; on the other hand, while the fabric is being formed in the fiber receiving unit, it needs to be pulled by the non-woven fabric traction roller to complete the unloading and thus realize continuous production. When the non-woven fabric is subjected to the unloading traction force, the shape of the cross structure changes and the crossing angle increases.

[0137] It can be understood that by adjusting the process and controlling parameters such as the spinneret extrusion speed and the distance between the spinneret unit and the fiber receiving unit surface, it is ensured that the nascent fibers are not completely solidified when attached to the fiber receiving unit surface and have a certain viscosity, ensuring that the upper and lower layers of fibers can bond to each other at the cross-contact points, playing the role of fixing the network and improving the strength of the non-woven fabric products.

[0138] Specifically, the spinning unit has a spinning amount of 0.5 ml / h to 5 ml / h, and a melt flow rate of 300 g / 10 min to 1200 g / 10 min.

[0139] On the other hand, the present invention discloses a one-step textile forming method, which, in addition to the above textile method, also includes:

[0140] The bracket and the fiber receiving unit rotate concentrically around the central axis;

[0141] The nonwoven fabric is unloaded and reeled from the fiber receiving unit.

[0142] Specifically, the support and the fiber receiving unit rotate concentrically around the central axis at the same speed.

[0143] Specifically, the textile raw material can be selected from any one of polypropylene, polyester, nylon, viscose fiber, acrylic fiber, polyethylene fiber, and chloroprene fiber; the fiber generation process can be carried out with the help of solution spinning, melt blowing spinning or electrospinning process, and with the help of solution spinning unit, melt blowing spinning unit or electrospinning unit as spinning unit, fiber filaments can be easily generated on the surface of the fiber receiving unit.

[0144] Specifically, under the traction action of the fabric, the rotational linear speed of the non-woven fabric traction roller 302 is the same as the rotational linear speed of the speed-controlled winding roller and the collection linear speed of the non-woven fabric winding roller 303, which is less than w, where w is the rotational linear speed of the fiber receiving unit.

[0145] It can be understood that when the collection linear speed of the non-woven fabric winding roller 303 is greater than w, there is a risk that the fiber filaments after the fiber receiving unit rotates one circle will not cross with the fiber filaments at the same position before the rotation, that is, the axial coordinate of the crest position of the wavy filament fibers generated after the fiber receiving unit rotates one circle is lower than the axial coordinate of the trough position of the wavy filament fibers before the fiber receiving unit rotates one circle, thereby showing that the filament fibers in adjacent phases before and after the fiber receiving unit rotates one circle do not cross at all, and the fabric cannot form a cross structure.

[0146] Preferably, the collection linear speed of the nonwoven fabric winding roller is less than 0.001w.

[0147] The present invention discloses a non-woven fabric with a cross structure, which is prepared by the above method. The non-woven fabric comprises a cross structure, and the initial cross angle is 3° to 7°.

[0148] Specifically, the reciprocating speed v of the spinning unit, the rotation linear speed of the fiber receiving unit and the traction linear speed w of the speed-controlled winding roller are adjusted according to the above method to achieve a change in the cross structure angle in the finished fabric between 3° and 7°.

[0149] In order to better illustrate the advancements of the present invention, the following examples and comparative examples are further provided:

[0150] Example 1

[0151] This embodiment specifically discloses a textile system and a one-step textile forming method, using a meltblowing spinning nozzle as an example of a spinning unit to prepare a short fiber non-woven fabric.

[0152] The raw material is PP specially made for Y1500 meltblown cloth.

[0153] The diameter of the nozzle of the spinning unit in the fiber receiving unit is 25 mm, the spinning amount of the spinning unit is 1.5 ml / h, and the melt flow rate is 950 g / 10 min.

[0154] w is taken as 26m / s, the collection line speed is 50mm / min, the theoretical design surface fabric thickness of the fiber receiving unit is 1mm, the theoretical design cross structure angle is 7°, and the thickness of the double-layer fabric collected by the non-woven fabric winding roller is 2mm.

[0155] The measurement showed that the longitudinal tensile strength of the fabric was 0.085 MPa, and the transverse tensile strength was 0.084 MPa; the longitudinal elongation at break was 193%; and the transverse elongation at break was 182%.

[0156] It should be noted that the transverse and longitudinal directions of the fabric described in the present invention are defined based on the state of the fabric after being wound by the non-woven fabric winding roller. The transverse direction is the direction of the fabric curling along the non-woven fabric winding roller, and the longitudinal direction is the direction parallel to the rotating axis of the non-woven fabric winding roller.

[0157] Example 2

[0158] This embodiment specifically discloses a textile system and a one-step textile forming method, using a meltblowing spinning nozzle as an example of a spinning unit to prepare a short fiber non-woven fabric.

[0159] The raw material is PP specially made for Y1500 meltblown cloth.

[0160] The diameter of the nozzle of the spinning unit in the fiber receiving unit is 25 mm, the spinning amount of the spinning unit is 0.5 ml / h, and the melt flow rate is 400 g / 10 min.

[0161] w is taken as 7m / s; the collection line speed is 30mm / min, the theoretical design surface fabric thickness of the fiber receiving unit is 0.5mm, the theoretical design cross structure angle is about 5°, and the thickness of the double-layer fabric collected by the non-woven fabric winding roller is 1.0mm.

[0162] After measurement, the longitudinal tensile strength of the fabric was 0.074 MPa, the transverse tensile strength was 0.081 MPa; the longitudinal elongation at break was 187%; and the transverse elongation at break was 174%.

[0163] Example 3

[0164] This embodiment specifically discloses a textile system and a one-step textile forming method, using a meltblowing spinning nozzle as an example of a spinning unit to prepare a short fiber non-woven fabric.

[0165] The raw material is PP specially made for Y1500 meltblown cloth.

[0166] The diameter of the nozzle of the spinning unit in the fiber receiving unit is 25 mm, the spinning amount of the spinning unit is 5 ml / h, and the melt flow rate is 1200 g / 10 min.

[0167] w is taken as 20m / s; the collection line speed is 100mm / min, the theoretical design surface fabric thickness of the fiber receiving unit is 0.45mm, the theoretical design cross structure angle is about 3°, and the thickness of the double-layer fabric collected by the non-woven fabric winding roller is 0.9mm.

[0168] The measurement showed that the longitudinal tensile strength of the fabric was 0.078 MPa, and the transverse tensile strength was 0.072 MPa; the longitudinal elongation at break was 171%; and the transverse elongation at break was 168%.

[0169] Example 4

[0170] This embodiment specifically discloses a textile system and a one-step textile forming method, using a solution spinning nozzle as an example of a spinning unit. The spinning unit has a spinning rate of 5 ml / h and uses commercially available spinning-grade PET as the spinning raw material to produce a short fiber nonwoven fabric. The remaining procedures are the same as in Example 1.

[0171] The measurement showed that the longitudinal tensile strength of the fabric was 0.125 MPa, and the transverse tensile strength was 0.114 MPa; the longitudinal elongation at break was 120.1%; and the transverse elongation at break was 118.2%.

[0172] Example 5

[0173] This embodiment specifically discloses a textile system and a one-step textile forming method, using an electrospinning nozzle as an example of a spinning unit. The spinning unit has a spinning rate of 5 ml / h and a spinning-grade viscose fiber as the spinning raw material. The rest is the same as in Example 1.

[0174] The measurement showed that the longitudinal tensile strength of the fabric was 0.064 MPa, and the transverse tensile strength was 0.062 MPa; the longitudinal elongation at break was 120%; and the transverse elongation at break was 113%.

[0175] Comparative Example 1

[0176] This embodiment specifically discloses a textile system and a one-step textile forming method, using a meltblown spinning nozzle as an example of a spinning unit. The fiber receiving unit does not rotate, while the spinning unit reciprocates. The fibers used to form the fabric are not oriented in the fiber receiving unit during formation and do not have a cross structure. The remaining aspects are the same as in Example 1.

[0177] After measurement, the longitudinal tensile strength of the fabric is 0.025MPa, and the transverse tensile strength is 0.023MPa; the longitudinal elongation at break is 59.1%; and the transverse elongation at break is 58.2%.

[0178] Comparative Example 2

[0179] This embodiment specifically discloses a textile system and a one-step textile forming method, using a meltblown spinning nozzle as an example of a spinning unit. The spinning unit does not reciprocate, and the prepared fabric does not have a cross structure. Other aspects are the same as in Example 1.

[0180] After measurement, the longitudinal tensile strength of the fabric was 0.076 MPa, the transverse tensile strength was 0.018 MPa; the longitudinal elongation at break was 172%; and the transverse elongation at break was 48.2%.

[0181] Comparative Example 3

[0182] Commercially available PET raw materials were purchased to prepare long-fiber geotextile nonwovens, corresponding to the standard GB / T 17639-2008.

[0183] After measurement, the longitudinal tensile strength of the fabric is 0.076MPa, and the transverse tensile strength is 0.074MPa; the longitudinal elongation at break is 58.2%; and the transverse elongation at break is 59.1%.

[0184] It can be seen from Examples 1 to 5 that the textile system and textile method of the present invention can be used to form a variety of spinning raw materials and are compatible with various processes such as solution spinning, electrospinning and melt-blown spinning.

[0185] By comparing Example 1 and Comparative Example 1, it can be seen that compared with the ordinary polypropylene melt-blown staple fiber non-woven fabric, the longitudinal tensile strength of Example 1 is increased by 240%, the longitudinal elongation at break is increased by 226%, the transverse tensile strength is increased by 265%, and the transverse elongation at break is increased by 213%.

[0186] By comparing Example 1 and Comparative Example 2, it can be seen that compared with the oriented polypropylene melt-blown staple fiber non-woven fabric without a cross structure, the longitudinal tensile strength of Example 1 is increased by 11.8%, the longitudinal elongation at break is increased by 12.21%, the transverse tensile strength is increased by 366%, and the transverse elongation at break is increased by 277.6%.

[0187] By comparing Example 4 and Comparative Example 3, it can be seen that compared with the ordinary PET melt-blown long fiber non-woven fabric, the longitudinal tensile strength of Example 1 is increased by 64.5%, the longitudinal elongation at break is increased by 106.3%, the transverse tensile strength is increased by 54.1%, and the transverse elongation at break is increased by 100%.

[0188] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the scope of protection of the present invention.

Claims

1. A textile system, characterized in that: include: Spinning unit, fiber receiving unit, non-woven fabric receiving unit; The fiber receiving unit is capable of rotating around its own central axis, and the spinning unit is arranged on one side of the fiber receiving unit and is capable of reciprocating in a direction parallel to the rotating axis of the fiber receiving unit; The non-woven fabric receiving unit includes: a bracket, a non-woven fabric traction roller and a non-woven fabric winding roller; The bracket is coaxially arranged with the fiber receiving unit, one end of the fiber receiving unit is suspended and fixed, and the other end is coaxially locked with the bracket in a non-contact manner and can rotate coaxially with the bracket; The non-woven fabric winding roller is arranged on a side where the fiber receiving unit is connected to the bracket. The central axis of the non-woven fabric winding roller is fixed to the bracket and can rotate relative to its central axis.

2. A textile system according to claim 1, characterized in that: The spinning unit is an airflow-assisted solution spinning unit, a melt-blown spinning unit, a melt-filament spinning unit, or a melt or solution electrostatic spinning unit.

3. A textile system according to claim 2, characterized in that: The fiber receiving unit is connected to the bracket through magnetic force, and the end portion of the fiber receiving unit connected to the bracket enters the inside of the bracket, so that the fiber receiving unit and the bracket rotate coaxially without contact.

4. A textile system according to claim 3, characterized in that: A second magnetic structure is provided on one side of the fiber receiving unit connected to the bracket; the second magnetic structure forms an annular magnetic field surrounding the fiber receiving unit.

5. A textile system according to claim 4, characterized in that: The bracket is provided with a first magnetic structure in the circumferential direction on one side connected to the fiber receiving unit.

6. A textile system according to claim 5, characterized in that: The first magnetic structure and the second magnetic structure are axial synchronous magnetic coupling structures.

7. A one-step textile forming method, characterized in that: The textile system according to any one of claims 1 to 6 comprises: A nonwoven fabric with a cross structure is prepared based on a fiber receiving unit that can rotate circumferentially around its own central axis and a spinning unit that reciprocates along the rotating axis of the fiber receiving unit; The bracket and the fiber receiving unit rotate concentrically around the central axis; The nonwoven fabric is unloaded and reeled from the fiber receiving unit.

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