A forming device, method and use of auxetic colored fiber

Abstract

The present invention relates to a forming device, method, and use of auxetic colored fibers. The forming device includes a feeding mechanism, an orientation-adjusting and conveying mechanism, an auxetic material feeding mechanism, a mixing mechanism, a spinning mechanism, a cooling mechanism, and a drafting and winding mechanism. The method comprises feeding single-color masterbatches individually through multiple feeding mechanisms, adjusting the fiber orientation via an orientation-adjusting mechanism, thoroughly mixing the masterbatches with the auxetic particles in a mixing mechanism, cooling and forming the fibers through a spinning mechanism and a cooling mechanism under the influence of temperature and pressure, and finally winding the auxetic colored fibers onto guide rollers of a winding mechanism. A characteristic of the present invention is that the color of the auxetic colored fibers can be mixed to obtain different colors based on the different content ratios of the single-color masterbatches. The auxetic colored fibers can be made into fabrics and garments of different colors, as well as functional textiles with negative Poisson's ratio effects, such as those for pressure reduction and shock absorption, and bullet and stab resistance.

Description

Technical Field

[0001] The present invention belongs to the technical field of textile materials and relates to a forming method, a device and a use of an auxetic colored fiber with a negative Poisson's ratio effect. Background Art

[0002] The negative Poisson's ratio is the ratio of the strain of a material in the direction perpendicular to the force to the strain in the direction of the force. When conventional materials are stretched (or compressed), they will shrink (or expand) in the direction perpendicular to the force. Such materials are called positive Poisson's ratio materials. On the contrary, some materials will expand (or shrink) in the direction perpendicular to the force. These materials are called negative Poisson's ratio materials, also known as axial expansion materials. Studies have found that materials with negative Poisson's ratio effects have special properties that traditional materials do not have. Their shear stiffness, fracture toughness, compressive strength, unidirectional curvature, energy absorption capacity, and permeability are all improved compared to traditional materials. These excellent mechanical properties make negative Poisson's ratio materials have potential applications in the automotive industry, personal protection, aerospace, biomedicine, and national defense. Moreover, current research on negative Poisson's ratio structural materials is mostly focused on foam and polymer materials, with less involvement in the field of textile materials, which still has great research potential.

[0003] High quality, high functionality, low energy consumption, and low emissions are the development trends in chemical fiber product technology. Eco-textiles, such as solution-dyed fibers, represent a new trend in consumption and production. Solution-dyed chemical fibers are made from a spinning solution or melt containing a colorant. The solution-dyed industry chain eliminates the dyeing step during processing, reducing resource and energy consumption within the textile industry chain and ensuring high fiber color fastness. In recent years, the solution-dyed fiber market has experienced rapid growth, with an average annual double-digit growth rate.

[0004] By installing an intelligent color matching system in the mixing unit and connecting it to the internet, we can establish an automated color matching and production processing system, improve product production efficiency and enhance the level of intelligence. This intelligent color matching system, based on masterbatch, supports the differentiation and greening of chemical fibers, achieving positive economic and social benefits.

[0005] This patent provides a method, apparatus, and application for producing auxetic colored fibers with high production efficiency and flexible, diverse colored yarn colors. By modifying the traditional melt-spinning process and adding a masterbatch feeding mechanism, an auxetic material feeding mechanism, and a mixing mechanism, the fiber's auxetic properties and color control can be efficiently and accurately achieved. This invention achieves auxetic colored fibers by uniformly mixing multiple masterbatches with auxetic particles in a mixing mechanism, cooling the resulting yarn under cold air, and then winding it onto a bobbin. The innovative features of the auxetic colored fibers produced by this invention lie in the addition of auxetic particles and the precise, flexible control of the yarn color. Auxetic fibers can be used in functional textiles for pressure reduction and shock absorption, bullet and stab protection, medical and clinical applications, and deepwater operations; in personal protective equipment such as protective clothing, bulletproof vests, knee pads, or sheaths; in medical and biological products such as artificial auxetic blood vessels; and in defense and military applications such as nuclear submarines and deepwater exploration equipment. Summary of the Invention

[0006] The present invention aims to provide a method for forming colored fibers with a negative Poisson's ratio effect, as well as a corresponding production apparatus and application. The production apparatus comprises a conventional melt-spinning system and a feeding system for masterbatches and auxetic particles. The masterbatches include a variety of single-color masterbatches fed individually, and the auxetic particles are shaped like concave tetrahedrons. The resulting products are suitable for functional and intelligent textiles, as well as textiles with features such as pressure reduction and shock absorption, and ballistic and stab resistance.

[0007] A forming device for extrude colored fibers comprises at least three groups of feeding mechanisms and orientation adjustment and conveying mechanisms connected in series, each group of feeding mechanisms consisting of several hoppers and metering pumps to achieve quantitative and uniform conveying of single masterbatch; the three groups of orientation adjustment and conveying mechanisms and extrude particle feeding mechanisms are commonly connected to one end of a mixing mechanism, the other end of the mixing mechanism is connected to one end of a spinning mechanism, the other end of the spinning mechanism is connected to a drafting and winding mechanism, and a spinneret cooling mechanism is arranged on the periphery of the spinning mechanism.

[0008] Preferably, each group of feeding mechanisms of the present invention includes a plurality of independent single-color masterbatch feeding hoppers.

[0009] Preferably, the monochromatic masterbatch of the present invention comprises at least one of red masterbatch, yellow masterbatch, blue masterbatch, black masterbatch, white masterbatch, gray masterbatch, cyan masterbatch, and green masterbatch.

[0010] Preferably, the monochromatic masterbatch of the present invention is a thermoplastic polymer, including at least one of polyester, polypropylene, nylon and aramid.

[0011] Preferably, the auxetic particle feeding mechanism of the present invention is connected to the mixing mechanism via a pipeline, and the auxetic particles fed by the auxetic particle feeding mechanism are concave icosahedrons or concave hexahedrons.

[0012] Preferably, the spinneret cooling mechanism of the present invention is used to spray cold air or cold water to cool and form the fibers sprayed out by the spinneret; the spinneret has spinneret holes of different shapes for spinning, and the spinneret holes are at least one of circular, triangular, C-shaped, skin-core, trilobal, and ribbon types.

[0013] Preferably, the drawing and winding mechanism of the present invention is used to draw and wind the extruded colored fibers obtained by the spinning mechanism; the winding mechanism is used to quickly wind the extruded colored fibers, so as to evenly wind the extruded colored fibers on the guide roller of the winding mechanism.

[0014] Preferably, the auxetic colored fiber added with auxetic particles of the present invention has a negative Poisson's ratio effect; the color selection of the auxetic colored fiber is achieved by controlling the feeding ratio of the single color masterbatch in the hopper.

[0015] A method for forming an auxetic colored fiber is carried out according to the following steps:

[0016] (1) Each feeding mechanism consists of a hopper and a metering pump. Each single-color masterbatch is fed separately by the hopper to achieve quantitative and uniform delivery of the masterbatch. According to the needs of design and production, the metering pump is controlled by the color matching system software to adjust the mass ratio of the single-color masterbatch in each hopper to obtain the required fiber color. The single-color masterbatch enters the corresponding orientation adjustment and delivery mechanism through the pipeline;

[0017] (2) The orientation adjustment conveying mechanism realizes the shear flow of the polymer molecular chain through the built-in caliber pipe. The orientation adjustment conveying mechanism contains a temperature and magnetic field control device. When the melt stream passes through the orientation adjustment conveying mechanism, the orientation degree of the fiber macromolecules in the melt stream is adjusted under the control of temperature and magnetic field;

[0018] (3) The auxetic particles fed by the auxetic material feeding mechanism and the polymer raw materials delivered by the feeding mechanism are evenly mixed in the mixing mechanism. The mixing mechanism is divided into multiple mixing compartments and is equipped with a temperature control device to achieve sufficient mixing of the polymer melt stream and the auxetic particles;

[0019] (4) The uniformly mixed polymer melt containing auxetic particles passes through the spinneret cooling mechanism and is ejected from the spinneret, where it is cooled into auxetic colored silk fibers under the action of temperature and pressure, where the temperature and pressure are respectively achieved by cooling air and a coagulation bath;

[0020] (5) After the fiber is cooled and formed, it is stretched and wound in a drawing and winding mechanism. The colored silk fibers are pre-stretched by the guide rollers and are evenly stretched and thinned. Finally, they are evenly wound on the guide rollers of the winding mechanism.

[0021] A use of an auxetic colored fiber, which has a good negative Poisson's ratio effect and flexible and changeable colored yarn color control, is used as a fiber for preparing clothing fabrics, home textiles, and industrial textiles; or is used in textiles with pressure reduction, shock absorption, bulletproof and stab-proof functions.

[0022] Compared with the prior art, the technical solution of the present invention has the following innovative features and beneficial effects:

[0023] (1) The present invention provides an intelligent color matching system to obtain fibers of various colors, establishes an automated color matching and production processing system, improves product production efficiency, and enhances the intelligent level of color matching. The intelligent color matching system based on single-color masterbatch supports the differentiation of chemical fibers, improves the level of greening, and can achieve good economic and social benefits.

[0024] (2) The present invention has a wide range of applications. The colored fibers of the present invention have a good negative Poisson's ratio effect and flexible and variable colored yarn color control, which can meet the current chemical fiber enterprises' growing demand for chemical fiber colors. The colored fibers with a negative Poisson's ratio effect have good energy absorption, drug release capacity, and hydraulic stability, and can be used in functional textiles such as decompression and shock absorption, bulletproof and stab-proof, medical clinical, and deep-water operations; protective clothing, bulletproof vests, knee pads or sheaths, and other human protective equipment; medical and biological products such as artificial tensile blood vessels; nuclear submarines, deep-water detection equipment, and other fields.

[0025] (3) The present invention imparts a negative Poisson's ratio effect to fibers by adding concave tetrahedral and hexahedral auxetic particles. Auxetic materials exhibit improved shear stiffness, fracture toughness, compressive strength, isotropic curvature, energy absorption capacity, and permeability compared to traditional materials, resulting in a wide range of applications. Currently, research on negative Poisson's ratio structural materials is primarily focused on foams and polymers, with limited involvement in the field of textile materials, which still holds great research potential.

[0026] (4) The present invention represents a new trend in textile consumption and production, using solution-dyed fibers. The solution-dyed industry chain omits the dyeing step during processing, reducing resource and energy consumption in the textile industry chain. Furthermore, the fibers exhibit high color fastness, representing the current trend of high-quality, high-performance, low-energy, and low-emission development in the textile industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of a forming device for axially expanding colored fibers according to the present invention.

[0028] Figure 2 It is a structural schematic diagram of the orientation adjustment mechanism of the present invention.

[0029] Figure 3It is a schematic cross-sectional view of the auxetic colored fiber of the present invention. DETAILED DESCRIPTION

[0030] Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiments are only used to illustrate the present invention and are not used in limiting the scope of the present invention.In addition, should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall equally within the scope limited by the appended claims of the application.

[0031] The embodiments of this patent all utilize a method and apparatus for forming auxetic colored fibers. The forming apparatus comprises a conventional melt-spinning system and a masterbatch and auxetic particle feeding system. The masterbatch types include a variety of single-color masterbatches fed separately, and the auxetic particles are shaped like concave icosahedrons, concave hexahedrons, and other shapes. The auxetic colored fibers can be used to make auxetic fabrics and related functional materials. The resulting products are suitable for use in smart textiles and defense and military applications.

[0032] like Figure 1 As shown, a forming device for auxetic colored fibers comprises a feeding mechanism, an orientation-adjusting and conveying mechanism, an auxetic material feeding mechanism, a mixing mechanism, a spinning mechanism, a cooling mechanism, and a drawing and winding mechanism. The feeding mechanism comprises a hopper and a metering pump, and realizes quantitative and uniform delivery of masterbatches; the orientation-adjusting and conveying mechanism realizes shear flow of polymer molecular chains through a built-in aperture pipe; the auxetic material feeding mechanism is used to feed auxetic particles and the polymer raw material conveyed by the feeding mechanism, and the auxetic particles are mixed uniformly in the mixing mechanism, and then spun and cooled by the spinning mechanism, and finally drawn and wound by the drawing and winding mechanism.

[0033] The feeding mechanism of the present invention can be provided with multiple independent feeding mechanisms as needed, each feeding mechanism realizes the independent feeding of single-color masterbatch respectively, and the mass ratio of single-color masterbatch supplied by each feeding mechanism is delivered according to the color matching system software; the single-color masterbatch delivered by the multiple feeding mechanisms can be mixed to realize the color requirement of the colored fiber spinning liquid; the single-color masterbatch is fed into the hopper of the feeding mechanism in a certain proportion according to the color requirement to realize the flexible control of the fiber color, and enters the orientation adjustment conveying mechanism through the pipeline to adjust the orientation degree, such as Figure 2 As shown, the mixing mechanism is fully mixed with the auxetic particles fed through the auxetic material feeding mechanism.

[0034] Monochrome masterbatches of different colors include red masterbatch, yellow masterbatch, blue masterbatch, black masterbatch, white masterbatch, gray masterbatch, cyan masterbatch, and green masterbatch.

[0035] The auxetic particle feeding mechanism is connected to the mixing mechanism through a pipeline. The auxetic particles fed by the auxetic particle feeding mechanism are concave icosahedrons, concave hexahedrons, etc.

[0036] The cooling mechanism can spray cold air or cold water to cool and shape the fibers sprayed by the spinning mechanism; the spinning mechanism has spinning holes of different shapes, which are used for spinning under certain production conditions. The spinning holes are circular, triangular, C-shaped, skin-core type, trilobal type, and ribbon type.

[0037] The drawing and winding mechanism can draw and wind the fibers, and the drawing can stretch and thin the fibers and improve their orientation; the winding mechanism can achieve rapid winding of the fibers, and achieve uniform winding of the expanded colored fibers on the guide rollers of the winding mechanism.

[0038] like Figure 3 As shown, the auxetic colored fibers obtained by using the forming device of the present invention have a negative Poisson's ratio effect due to the addition of auxetic particles such as concave icosahedrons and concave hexahedrons; the auxetic colored fibers are prepared into auxetic colored fibers of different colors and categories according to different usage and production requirements, and their color selection is achieved by controlling the feeding ratio of single-color masterbatch in the feeding mechanism.

[0039] The monochromatic masterbatch is a thermoplastic polymer, including polyester, polypropylene, nylon and aramid.

[0040] A method for forming an auxetic colored fiber is carried out according to the following steps:

[0041] (1) The feeding mechanism consists of a hopper and a metering pump. Each single-color masterbatch is fed separately to achieve quantitative and uniform delivery of the masterbatch. According to the needs of design and production, the color matching system software adjusts the mass ratio of the single-color masterbatch in each feeding barrel to obtain the required fiber color. The single-color masterbatch enters the corresponding orientation adjustment and delivery mechanism through the pipeline;

[0042] (2) The orientation adjustment conveying mechanism realizes the shear flow of the polymer molecular chain through the built-in caliber pipe. The orientation adjustment conveying mechanism contains a temperature and magnetic field control device. When the melt stream passes through the orientation adjustment conveying mechanism, the orientation degree of the fiber macromolecules in the melt stream can be adjusted under the control of temperature and magnetic field, so that the orientation degree of the fiber macromolecules is maximized, which is beneficial to the subsequent melt spinning process;

[0043] (3) The auxetic particles fed by the auxetic material feeding mechanism and the polymer raw materials delivered by the feeding mechanism are evenly mixed in the mixing mechanism. The mixing mechanism is divided into multiple mixing compartments and is equipped with a temperature control device to achieve sufficient mixing of the polymer melt stream and the auxetic particles;

[0044] (4) The uniformly mixed polymer melt containing auxetic particles flows into the spinneret cooling mechanism, is ejected from the spinneret, and is cooled into auxetic colored silk fibers under the action of temperature and pressure. The temperature and pressure can be achieved by cooling air and coagulation bath respectively.

[0045] (5) After the fiber is cooled and formed, it is stretched and wound in a drawing and winding mechanism. The colored silk fibers are pre-stretched by the guide rollers and are evenly stretched and thinned. Finally, they are evenly wound on the guide rollers of the winding mechanism.

[0046] The colored flexi-extension fibers of the present invention have a good negative Poisson's ratio effect and flexible and variable colored yarn color control, which can meet the current chemical fiber enterprises' growing demand for color of chemical fibers. In addition, the colored fibers with a negative Poisson's ratio effect have good energy absorption, drug release capacity, and hydraulic stability, and can be applied to functional textiles such as pressure reduction and shock absorption, bulletproof and stab-proof, medical clinical, and deep-water operations; protective clothing, bulletproof vests, knee pads or sheaths, and other human protective equipment; medical and biological products such as artificial flexi-extension blood vessels; nuclear submarines, water detection equipment, and other fields.

[0047] The present invention relates to a method for forming auxetic colored fibers, which is used to prepare fibers and fabrics of various colors having a negative Poisson's ratio effect, and specifically involves the following five embodiments: Embodiment 1: pink auxetic polyester fiber; Embodiment 2: red auxetic polyester fiber; Embodiment 3: green high-strength bulletproof auxetic polyester fiber; Embodiment 4: white auxetic polypropylene fiber; and Embodiment 5: yellow auxetic nylon fiber.

[0048] Table 1

[0049]

[0050]

[0051] As shown in Table 1 above, corresponding parameters are set for the components involved in the five embodiments, including (1) various production process conditions of the feeding mechanism (color, heating temperature, extrusion speed, material); (2) the shape and size of the expanded particles; (3) relevant process parameters of the spinneret mechanism (spinneret hole shape, spinneret hole diameter, spinneret speed, cooling source of the cooling mechanism); (4) the stretching speed and winding speed of the stretching and winding mechanism.

Claims

1. A method for forming auxetic colored fibers, characterized in that A forming device is used, comprising at least three sets of feeding mechanisms and orientation adjustment and conveying mechanisms connected in series, each set of feeding mechanisms consisting of a plurality of hoppers and metering pumps to achieve quantitative and uniform delivery of single-color masterbatch; the three sets of orientation adjustment and conveying mechanisms and the auxetic particle feeding mechanism are commonly connected to one end of a mixing mechanism, the other end of the mixing mechanism is connected to one end of a spinning mechanism, the other end of the spinning mechanism is connected to a drafting and winding mechanism, and a spinneret cooling mechanism is provided on the periphery of the spinning mechanism; The forming method is carried out according to the following steps: (1) Each feeding mechanism consists of a hopper and a metering pump. Each single-color masterbatch is fed separately by the hopper to achieve quantitative and uniform delivery of the masterbatch. According to the needs of design and production, the metering pump is controlled by the color matching system software to adjust the mass ratio of the single-color masterbatch in each hopper to obtain the required fiber color. The single-color masterbatch enters the corresponding orientation adjustment and delivery mechanism through the pipeline; (2) The orientation adjustment conveying mechanism realizes the shear flow of the polymer molecular chain through the built-in caliber pipe. The orientation adjustment conveying mechanism contains a temperature and magnetic field control device. When the melt stream passes through the orientation adjustment conveying mechanism, the orientation degree of the fiber macromolecules in the melt stream is adjusted under the control of temperature and magnetic field; (3) The auxetic particles fed by the auxetic material feeding mechanism and the polymer raw materials transported by the feeding mechanism are evenly mixed in the mixing mechanism. The mixing mechanism is divided into multiple mixing compartments and is equipped with a temperature control device to achieve sufficient mixing of the polymer melt stream and the auxetic particles. The auxetic particle feeding mechanism is connected to the mixing mechanism through a pipeline. The auxetic particles fed by the auxetic particle feeding mechanism are concave tetrahedrons or concave hexahedrons. (4) The uniformly mixed polymer melt containing auxetic particles passes through the spinneret cooling mechanism and is ejected from the spinneret, where it is cooled into auxetic colored silk fibers under the action of temperature and pressure, where the temperature and pressure are respectively achieved by cooling air and a coagulation bath; (5) After the fiber is cooled and formed, it is stretched and wound in a drawing and winding mechanism. The colored silk fibers are pre-stretched by the guide rollers and are evenly stretched and thinned. Finally, they are evenly wound on the guide rollers of the winding mechanism.

2. The method for forming an auxetic colored fiber according to claim 1, wherein: Each group of feeding mechanisms includes multiple independent single-color masterbatch feeding hoppers.

3. The method for forming an auxetic colored fiber according to claim 2, wherein: The single-color masterbatch includes at least one of a red masterbatch, a yellow masterbatch, a blue masterbatch, a black masterbatch, a white masterbatch, a gray masterbatch, a cyan masterbatch, and a green masterbatch.

4. The method for forming an auxetic colored fiber according to claim 2, wherein: The monochromatic masterbatch is a thermoplastic polymer, including at least one of polyester, polypropylene, nylon and aramid.

5. The method for forming an auxetic colored fiber according to claim 1, wherein: The spinneret cooling mechanism is used to spray cold air or cold water to cool and shape the fibers sprayed by the spinneret; the spinneret has spinneret holes of different shapes for spinning, and the spinneret holes are at least one of circular, triangular, C-shaped, skin-core, trilobal, and ribbon shapes.

6. The method for forming an auxetic colored fiber according to claim 1, wherein: The drafting and winding mechanism is used to draft and wind the extruded colored fibers obtained by the spinning mechanism; the winding mechanism is used to quickly wind the extruded colored fibers, so as to evenly wind the extruded colored fibers on the guide roller of the winding mechanism.

7. The method for forming an auxetic colored fiber according to claim 1, wherein: The auxetic colored fiber added with auxetic particles has a negative Poisson's ratio effect; the color selection of the auxetic colored fiber is achieved by controlling the feeding ratio of the single color masterbatch in the hopper.

8. Use of the auxetic colored fiber obtained by the forming method according to claim 1, characterized in that: The invented auxetic colored fiber has good negative Poisson's ratio effect and flexible and variable colored yarn color control. Used to prepare fibers for clothing fabrics, home textiles, and industrial textiles; or used in textiles with pressure relief, shock absorption, bulletproof and stab-proof functions.

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