Down jacket with antibacterial, anti-mite and anti-static functions and preparation method

Abstract

The present application relates to the technical field of clothing fabric modification, and relates to a down jacket with antibacterial, anti-mite and antistatic functions and a preparation method. The down jacket comprises an outer layer fabric, an inner layer fabric and a down filling layer interposed between the outer layer fabric and the inner layer fabric. The outer layer fabric is a composite functional fabric, the composite functional fabric comprises an outer surface layer, an inner functional layer containing functional fibers and a conductive network combined with the inner functional layer. The functional fibers comprise modified regenerated cellulose fibers and low-melting-point polyester core-sheath fibers. The modified regenerated cellulose fibers have plant composite essential oil microcapsules fixed therein. The plant composite essential oil conductive network is formed by periodically arranged conductive core-spun yarns. The composite functional fabric has a melting point adhesion node composed of a skin layer melting solidification of the low-melting-point polyester core-sheath fibers. The present application takes into account the fabric structure stability and wearing comfort, and improves the comprehensive performance of the down jacket in terms of antibacterial, anti-mite, antistatic and anti-piercing.

Description

Technical Field

[0001] This invention relates to the technical field of clothing fabric modification, specifically to a down jacket with antibacterial, anti-mite, and antistatic functions, and its preparation method. Background Technology

[0002] Current down jackets typically use natural duck or goose down as the main filling material, which is lightweight and provides excellent warmth. Because down itself contains a certain amount of fat and protein, it easily comes into contact with and absorbs human skin flakes, sweat, and dust during long-term wear, storage, and handling. When the storage environment has high humidity or is not adequately cleaned and maintained, it easily provides conditions for bacterial growth and mite reproduction, leading to problems such as unpleasant odors, decreased hygiene, and skin itching.

[0003] As products evolve towards multifunctionality, the market demands down jacket fabrics that simultaneously provide features such as down-proofness, breathability, antibacterial properties, mite resistance, and antistatic properties. Especially in the dry winter environment, fabric friction easily generates static electricity, causing clothing to stick to the skin and feel uncomfortable, and also attracting airborne dust, affecting cleanliness. Therefore, improving the overall performance of fabrics without sacrificing softness and breathability is a crucial direction for current market research and development.

[0004] Existing technologies for preparing antibacterial and anti-mite textiles are mainly divided into surface finishing methods and embedded functional fiber methods. The former is simple in process, but the functional components are easily lost during washing and repeated friction, resulting in insufficient retention. The latter has relatively better functional durability, but it faces problems such as difficulty in dispersing active ingredients during spinning and susceptibility to heat damage. Moreover, relying on a single functional fiber makes it difficult to achieve a comprehensive balance between down-proofness, antistatic properties, and softness required for down jackets.

[0005] For down jacket applications, CN115923276B discloses a mite-proof down jacket fabric and its processing method. The fabric includes an inner layer and an outer layer heat-pressed onto the inner layer. The outer layer is a plain weave fabric made of cotton fiber, modified viscose fiber, and polylactic acid fiber. The modified viscose fiber is obtained by adding camel thorn alkaline essential oil and a thickener to a viscose system, followed by heating, stirring, ultrasonic dispersion, defoaming, and wet spinning. The resulting fabric is then heat-pressed and shaped before being laminated with the inner layer. This technology utilizes camel thorn alkaline essential oil to impart certain mite-proof and antibacterial properties to the fabric, and the shrinkage or bonding effect of polylactic acid fiber during the heat-pressing process reduces the yarn gaps, thereby improving the fabric's mite-proof and down-proof effects. However, plant active ingredients such as alkaline essential oils from camel thorn usually have a certain degree of volatility and heat sensitivity. For durable clothing such as down jackets that need to be used for a long time and stored repeatedly, it is difficult to fully take into account the fixation efficiency, sustained release stability and subsequent processing adaptability of active ingredients by simply directly mixing them.

[0006] For example, CN217993710U discloses a down jacket fabric with antistatic, heat-generating, and antibacterial functions. This fabric forms a composite functional layer by interweaving graphene fibers and nylon fibers to achieve antistatic, heat-generating, and antibacterial properties. While this approach can provide some antistatic effect, the cost of functional materials like graphene is relatively high. On the other hand, directly incorporating conductive materials such as carbon black conductive short fibers or stainless steel short fibers may cause problems such as darker yarn color, difficulty in dyeing light colors, uneven yarn consistency, increased fuzz, or a stiffer hand feel.

[0007] In terms of down-proofing and fabric densification, existing technologies typically reduce the porosity between yarns through hot pressing, coating, high-temperature setting, or a high proportion of heat-shrinkable fibers. For functional fabrics containing plant-based active ingredients or microcapsule structures, excessively high temperatures or intense hot pressing can adversely affect the stability of the active ingredients. Therefore, there is a certain contradiction between the structural densification required for down-proofing and the fabric's softness, breathability, and the stability of functional ingredients.

[0008] In summary, existing technologies still struggle to simultaneously achieve stable and sustained release of plant-based active ingredients, concealed construction of conductive networks, and a soft and dense fabric structure while maintaining controllable costs and compatibility with existing equipment. Therefore, there is an urgent need in this field for a composite functional fabric for down jackets that can systematically address these contradictions and comprehensively improve antibacterial, anti-mite, antistatic, and down-proof properties. Summary of the Invention

[0009] Therefore, this invention provides a composite functional fabric technology solution suitable for down jackets, which enables plant composite essential oil microcapsules to be stably fixed in regenerated cellulose fibers. At the same time, low-melting-point polyester core fibers form melting point bonding nodes, and a conductive network is constructed with periodically arranged conductive core-spun yarns. Thus, while taking into account the stability of the fabric structure, wearing comfort and processing feasibility, the overall performance of down jackets in terms of antibacterial, anti-mite, antistatic and down-proof properties is improved.

[0010] To achieve the above objectives, the present invention provides the following technical solution:

[0011] A down jacket with antibacterial, anti-mite and antistatic functions, comprising an outer fabric, an inner fabric, and a down filling layer sandwiched between the outer fabric and the inner fabric.

[0012] The outer fabric is a composite functional fabric, which includes at least an outer layer, an inner functional layer containing functional fibers, and a conductive network combined with the inner functional layer. The conductive network is disposed between the outer layer and the inner functional layer.

[0013] The functional fibers include modified regenerated cellulose fibers and low-melting-point polyester core-sheath fibers, with plant-based composite essential oil microcapsules immobilized in the modified regenerated cellulose fibers.

[0014] The plant-based compound essential oil microcapsules are formed by encapsulating plant-based compound essential oils with β-cyclodextrin, including camel thorn alkaline essential oil and clove oil.

[0015] The conductive network is formed by periodically arranged conductive core-spun yarns, which include a conductive filament core layer and a fiber outer layer covering the conductive filament core layer.

[0016] The composite functional fabric has melt point bonding nodes formed by the molten solidified sheath of low melting point polyester core fibers. The melt point bonding nodes are distributed between modified regenerated cellulose fibers, between conductive core yarns and adjacent yarns, and at the pore edges between yarns, and keep the modified regenerated cellulose fibers and conductive core yarns in the predetermined structure position of the composite functional fabric.

[0017] The down filling layer is made of duck or goose down that has undergone antibacterial treatment, anti-mite treatment, or a combination of antibacterial and anti-mite treatment.

[0018] The present invention is further configured such that: the inner functional layer is a woven structure or a knitted structure, and the yarn in the inner functional layer includes a blended yarn containing modified regenerated cellulose fiber and low melting point polyester core fiber.

[0019] The present invention is further configured such that: the fiber component in the inner functional layer comprises, by mass percentage:

[0020] 20–50 wt% of the modified regenerated cellulose fiber;

[0021] 30–60 wt% of at least one of cotton fiber and unmodified regenerated cellulose fiber;

[0022] 10–30 wt% of the aforementioned low-melting-point polyester core-sheath fiber;

[0023] The sum of the mass percentages of the above fiber components is 100 wt%.

[0024] The present invention is further configured such that the content of the plant compound essential oil microcapsules in the modified regenerated cellulose fiber is 3–15 wt% of the dry weight of the modified regenerated cellulose fiber;

[0025] In the plant compound essential oil microcapsules, the mass ratio of β-cyclodextrin to plant compound essential oil is 2:1–6:1;

[0026] In the plant compound essential oil, the mass ratio of camel thorn alkaline essential oil to clove oil is 2:1–3:1.

[0027] The present invention is further configured such that the low-melting-point polyester core-sheath fiber is a core-sheath structure short fiber;

[0028] The core layer of the low-melting-point polyester core-sheath fiber is polyethylene terephthalate with a melting point of not less than 230°C, and the sheath layer is modified polyester with a melting point of 110–140°C.

[0029] The present invention is further configured such that the melt point adhesive node is formed by the following thermal densification treatment:

[0030] Preheat and relax the composite functional fabric at 100–110℃.

[0031] It is then hot-pressed through hot press rollers at a temperature of 135–145℃ and a linear pressure of 0.3–0.5 MPa;

[0032] Then cool and set at 20–25℃;

[0033] After thermal densification, the sheath of the low-melting-point polyester core-sheath fiber undergoes selective melting, while the core layer of the low-melting-point polyester core-sheath fiber maintains its fiber support shape and forms melting point adhesion points at fiber intersections, yarn pores, and contact areas between conductive core-spun yarns and adjacent yarns.

[0034] The present invention is further configured such that: the conductive filament core layer is selected from at least one of carbon black composite conductive filament, metal conductive filament, and conductive polymer coated filament;

[0035] The linear density of the conductive filament core layer is 20–50 dtex;

[0036] The conductive filament core layer has a mass percentage of 2–10 wt% in the conductive core-spun yarn.

[0037] The present invention is further configured such that the conductive core-spun yarn is arranged periodically along the warp and weft directions or both the warp and weft directions;

[0038] The conductive core-spun yarns are arranged such that one conductive core-spun yarn is placed every 3-10 yarns.

[0039] The yarn includes at least one of natural fiber yarn, regenerated cellulose fiber yarn, synthetic fiber yarn, and blended yarn containing modified regenerated cellulose fiber and / or low-melting-point polyester core fiber.

[0040] The present invention is further configured such that: the outer fabric and / or the inner fabric also include at least one of chitosan, quaternary ammonium salt antibacterial agent and hydrophilic antistatic agent fixed by post-treatment;

[0041] The finishing process includes padding, pre-drying, and curing.

[0042] A method for preparing a down jacket with antibacterial, anti-mite, and antistatic functions includes the following steps:

[0043] S1. Camel thorn alkaline essential oil and clove oil are mixed to obtain plant compound essential oil. β-cyclodextrin is dissolved in an aqueous ethanol solution to form a host solution. The plant compound essential oil is added to the host solution at 40–60°C and an inclusion reaction is carried out under stirring or ultrasonic conditions. After cooling crystallization, solid-liquid separation, washing, drying and pulverizing, plant compound essential oil microcapsules are obtained.

[0044] S2. Add plant compound essential oil microcapsules to a mature viscose solution, and then disperse, degas and wet spin to obtain modified regenerated cellulose fibers containing plant compound essential oil microcapsules.

[0045] S3. The modified regenerated cellulose fiber, low melting point polyester core fiber, cotton fiber and / or unmodified regenerated cellulose fiber are mixed and spun to obtain a blended yarn, and the conductive filament is used as the core layer and the conductive filament is covered with a fiber outer layer to obtain a conductive core-spun yarn.

[0046] S4. Prepare a composite functional fabric using the blended yarn and the conductive core-spun yarn, such that the conductive core-spun yarn is periodically arranged in the composite functional fabric to form a conductive network.

[0047] S5. In the temperature range above the melting point of the sheath of the low-melting-point polyester core fiber and below the melting point of the core layer, the composite functional fabric is subjected to hot pressing and cooling treatment, so that the sheath of the low-melting-point polyester core fiber melts and solidifies, and melt point adhesive nodes are formed between the modified regenerated cellulose fibers, between the conductive core yarn and adjacent yarns, and at the pore edges between the yarns, to obtain the outer fabric.

[0048] S6. Duck or goose down that has undergone antibacterial treatment, anti-mite treatment, or a combination of antibacterial and anti-mite treatment is used as the down filling layer. The outer fabric, down filling layer, and inner fabric are cut and then sewn, laminated, or a combination of sewing and lamination to produce a down jacket.

[0049] Compared with the shortcomings of the prior art, the beneficial effects of the present invention are as follows:

[0050] This invention combines alkaline camel thorn oil and clove oil to form a plant-based composite essential oil. The composite essential oil is then encapsulated with β-cyclodextrin to create plant-based composite essential oil microcapsules, which are subsequently fixed into modified regenerated cellulose fibers. Compared to directly applying plant essential oils to the fabric surface or incorporating them into the spinning system, this invention reduces the loss of plant active ingredients during spinning, heat treatment, washing, and wear friction, thus improving the longevity of the antibacterial and anti-mite functions of down jacket fabrics.

[0051] This invention introduces low-melting-point polyester core-sheath fibers into the inner functional layer. During thermal densification, the sheath of these fibers selectively melts, while the core layer maintains its fiber support structure. After cooling and solidification, melt-bonded nodes are formed at fiber intersections, yarn gaps, and the contact areas between conductive core-spun yarns and adjacent yarns. This structure allows for appropriate adjustment of fabric porosity, reducing the risk of down feathers escaping through yarn gaps, while avoiding problems such as fabric stiffness and reduced breathability caused by integral coatings or excessive hot pressing.

[0052] A conductive network is formed by periodically arranging conductive core-spun yarns, with conductive filaments located in the yarn core and covered by an outer fiber sheath. This structure reduces the adverse effects of direct exposure of conductive materials on the fabric's appearance, feel, and dyeing properties. Simultaneously, the melting point bonding nodes formed by the low-melting-point polyester core-sheath fibers stabilize the structure of the conductive core-spun yarns within the composite functional fabric, reducing the risk of loosening or discontinuity of the conductive pathways during washing, rubbing, and long-term wear, thereby improving the retention of antistatic properties. Attached Figure Description

[0053] Figure 1 This is a cross-sectional schematic diagram of the composite functional fabric of the present invention;

[0054] Figure 2 This is a schematic diagram of the organizational structure of the internal functional layers of the present invention;

[0055] Figure 3 This is a schematic diagram of the melting point adhesion node of the present invention;

[0056] Figure 4 The diagram shows three morphologies of the melting point adhesion of the inner functional layer.

[0057] Outer layer 1, inner functional layer 3, conductive network 2, ordinary yarn 24, conductive core-spun yarn 25, conductive filament 251, fiber outer sheath 252, melting point bonding node 45, inter-yarn pores 46. Detailed Implementation

[0058] Reference Figures 1 to 4 The embodiments of the present invention will be further described below.

[0059] Example 1: This example provides a down jacket with antibacterial, anti-mite, and antistatic functions, comprising an outer fabric, an inner fabric, and a down filling layer sandwiched between the outer and inner fabrics. The outer fabric is a composite functional fabric, comprising an outer outer layer, an inner functional layer, and a conductive network bonded to the inner functional layer; the inner functional layer contains modified regenerated cellulose fibers, cotton fibers, and low-melting-point polyester core-sheath fibers; the conductive network is formed by periodically arranged conductive core-spun yarns.

[0060] S1. Preparation of plant compound essential oil microcapsules:

[0061] Camel thorn alkaline essential oil and clove oil were mixed at a mass ratio of 2.5:1 and stirred at room temperature for 25 minutes to fully mix the two plant active components, thus obtaining a plant compound essential oil.

[0062] β-Cyclodextrin was added to a 50% (v / v) aqueous ethanol solution and stirred at 45°C to dissolve, forming a β-cyclodextrin host solution. The plant-based essential oil was then slowly added dropwise to the β-cyclodextrin host solution at a mass ratio of 4:1 (β-cyclodextrin to plant-based essential oil). The system temperature was maintained at 45°C during the addition process, and stirring was continuous to allow the plant-based essential oil to gradually form an inclusion complex with the β-cyclodextrin.

[0063] After the addition was complete, the reaction was stirred at 45°C for 2 hours. Subsequently, the reaction system was ultrasonically dispersed for 12 minutes to reduce the local aggregation of the plant compound essential oils in the system. After ultrasonic treatment, stirring was continued for 30 minutes. Then, the reaction system was cooled to 10°C and allowed to stand for crystallization for 8 hours to allow the inclusion products to precipitate.

[0064] After crystallization, the reaction system was subjected to solid-liquid separation, the solid product was collected, and washed with a small amount of low-temperature aqueous ethanol to remove unencapsulated free plant essential oils and surface impurities. The washed solid product was vacuum dried to constant weight below 45°C, then pulverized and sieved to obtain plant essential oil microcapsules.

[0065] The resulting plant-based compound essential oil microcapsules were formed by encapsulating plant-based compound essential oils with β-cyclodextrin and were used for subsequent preparation of modified regenerated cellulose fibers.

[0066] S2. Preparation of modified regenerated cellulose fibers:

[0067] Use the matured viscose solution as the spinning base solution. Add the plant compound essential oil microcapsules obtained in step S1 to the matured viscose solution, with the amount of plant compound essential oil microcapsules added calculated as 8 wt% of the dry weight of regenerated cellulose in the viscose solution.

[0068] During the addition process, the temperature of the viscose system was controlled to be no higher than 25℃, and a low-shear stirring method was used to ensure that the plant compound essential oil microcapsules were uniformly dispersed in the viscose solution. To reduce the impact of air bubbles on fiber continuity during spinning, the dispersed viscose system was subjected to vacuum degassing treatment to obtain a viscose spinning solution containing plant compound essential oil microcapsules.

[0069] The viscose spinning solution was wet-spun into fibers. After spinning, the fibers were drawn, washed, oiled, dried, and cut to obtain modified regenerated cellulose short fibers containing plant compound essential oil microcapsules.

[0070] In this embodiment, the length of the modified regenerated cellulose short fiber can be controlled to a short fiber specification suitable for processing by the cotton spinning system, so that it can be blended with cotton fiber and low-melting-point polyester core fiber.

[0071] S3. Preparation of blended yarns and conductive core-spun yarns:

[0072] Take the modified regenerated cellulose short fiber, cotton fiber and low melting point polyester core fiber obtained in step S2, and mix them in a mass percentage of 35:45:20 to obtain the mixed fiber for the inner functional layer.

[0073] The low-melting-point polyester core-sheath fiber is a short fiber with a core-sheath structure. Its core layer is polyethylene terephthalate with a melting point of not less than 230°C, while the sheath layer is modified polyester with a melting point of 125°C. This core-sheath structure allows the low-melting-point polyester core-sheath fiber to selectively melt the sheath layer during subsequent thermal densification, while the core layer maintains the basic support structure of the fiber.

[0074] The above-mentioned mixed fibers are sequentially processed through opening, mixing, carding, drawing, roving and spinning to obtain blended yarn for inner functional layers.

[0075] A conductive filament is used as the core layer. The conductive filament is a carbon black composite conductive filament with a linear density of 35 dtex. A mixed fiber containing the modified regenerated cellulose short fiber, cotton fiber, and low-melting-point polyester core-sheath fiber is used as the fiber outer layer. On a ring spinning machine or core-spun yarn spinning equipment, the conductive filament is fed into the spinning triangle area at a predetermined tension, so that the fiber outer layer covers the conductive filament, thus producing a conductive core-spun yarn.

[0076] In this embodiment, the conductive filament core layer accounts for 5 wt% of the conductive core-spun yarn by mass. The conductive filament core layer is located at the center of the yarn, and the fiber outer sheath is located on the outside of the conductive filament core layer to reduce the impact of exposed conductive material on the appearance and feel of the fabric.

[0077] S4. Preparation of composite functional fabric greige:

[0078] A composite functional fabric is woven from outer layer yarn, inner functional layer blended yarn, and conductive core-spun yarn obtained in step S3.

[0079] In this embodiment, the outer layer is formed using conventional down jacket outer layer polyester filament to provide appearance support and basic windproof performance; the inner functional layer is formed using the blended yarn obtained in step S3, so that modified regenerated cellulose fiber and low melting point polyester core fiber are distributed in the inner functional layer.

[0080] The conductive core-spun yarns are arranged periodically along the weft direction and embedded in the inner functional layer at a ratio of one conductive core-spun yarn every six ordinary yarns, forming a conductive network in the composite functional fabric. The ordinary yarns are the blended yarns for the inner functional layer obtained in step S3.

[0081] During the weaving process, the conductive core-spun yarn is kept in a stable organizational relationship with the adjacent ordinary yarn and is bonded to the inner functional layer so that the position of the conductive core-spun yarn can be further stabilized by the sheath melt solidification of the low-melting-point polyester core-sheath fiber in the subsequent heat densification treatment.

[0082] S5. Thermal densification treatment: The composite functional fabric greige obtained in step S4 is preheated and relaxed at 105°C to make the yarn tension inside the fabric more uniform and reduce the dimensional fluctuations in the subsequent hot pressing process.

[0083] After preheating, the composite functional fabric is fed into a hot press roller and hot-pressed at 140°C and 0.4 MPa linear pressure. This hot-pressing temperature is higher than the melting point of the sheath layer of the low-melting-point polyester core-sheath fiber but lower than the melting point of the core layer, causing selective melting of the sheath layer while the core layer retains its fiber support structure.

[0084] During the hot pressing process, the molten sheath of the low-melting-point polyester core-sheath fibers migrates and spreads at fiber intersections, yarn pores, and in the contact area between the conductive core-spun yarn and adjacent yarns. The hot-pressed fabric is then cooled and set at 22°C, allowing the molten sheath to solidify and form melt-bonded nodes.

[0085] After thermal densification, the melting point bonding nodes are composed of the molten solidified sheath of low-melting-point polyester core fibers and are distributed between modified regenerated cellulose fibers, between conductive core yarns and adjacent yarns, and at the edges of the gaps between yarns. This keeps the modified regenerated cellulose fibers and conductive core yarns in the predetermined structure of the composite functional fabric, resulting in the outer fabric.

[0086] Meltpoint bonding points refer to discrete connection points formed when the sheath of low-melting-point polyester core-sheath fibers softens or melts during thermodensification and solidifies after cooling and setting. Low-melting-point polyester core-sheath fibers consist of a core layer and a low-melting-point sheath layer covering the core layer. The core layer maintains its fiber support structure at the thermodensification temperature, while the sheath layer softens or selectively melts at the same temperature. During the thermodensification process, the composite functional fabric is subjected to the heat and linear pressure of hot rollers. The sheath layer of the low-melting-point polyester core-sheath fibers locally spreads and wets at fiber intersections, contact points between conductive core-spun yarns and adjacent yarns, and at the edges of gaps between yarns. Subsequently, during cooling and setting, the softened or melted sheath layer re-solidifies, forming multiple point-like, bridging, or edge-filling meltpoint bonding points. Meltpoint bonding points are not a continuous film covering the fabric surface, but rather multiple locally distributed discrete nodes. This node can locally fix the modified regenerated cellulose fibers and conductive core-spun yarns without completely sealing the gaps between the yarns, and also locally stabilize the edges of the gaps between the yarns. This helps to improve the structural stability, conductive network stability and down-proof performance of the composite functional fabric, while preserving the softness and breathability of the fabric as much as possible.

[0087] S6. Down jacket forming: Duck down that has undergone antibacterial and anti-mite composite treatment is used as the down filling material and filled into the lining fabric to form a down filling layer. The antibacterial and anti-mite composite treatment can be achieved using washing, impurity removal, sterilization, anti-mite finishing, and drying processes commonly used in the down industry.

[0088] The outer fabric, down filling layer, and inner fabric obtained in step S5 are cut according to the down jacket pattern. After cutting, the garment structure is formed by sewing, and the down filling layer is fixed between the outer fabric and the inner fabric to obtain a down jacket with antibacterial, anti-mite, and antistatic functions, which is Sample 1.

[0089] In this embodiment, plant-based composite essential oil microcapsules are immobilized within modified regenerated cellulose fibers, conductive core-spun yarns are periodically arranged to form a conductive network, and low-melting-point polyester core-sheath fibers are heat-densified to form melting point bonding nodes. These structures collectively constitute the composite functional structure of the outer fabric, providing the down jacket with antibacterial, anti-mite, antistatic, and down-proof functionalities.

[0090] Example 2: This example provides another down jacket with antibacterial, anti-mite, and antistatic functions. The basic structure of this example is the same as that of Example 1, both including an outer fabric, an inner fabric, and a down filling layer sandwiched between the outer and inner fabrics; the outer fabric is a composite functional fabric, which includes an outer layer, an inner functional layer, and a conductive network combined with the inner functional layer.

[0091] In this embodiment, the general processes of spinning, weaving, hot pressing and sewing that are the same as in Example 1 will not be repeated. The main focus is on the raw material ratios and process conditions that are different from those in Example 1.

[0092] S1. Preparation of plant compound essential oil microcapsules: Camel thorn alkaline essential oil and clove oil were mixed at a mass ratio of 2:1 and stirred at room temperature for 20 min to obtain plant compound essential oil.

[0093] β-Cyclodextrin was added to a 50% (v / v) aqueous ethanol solution and stirred at 40°C to dissolve, forming a β-cyclodextrin host solution. The plant-based essential oil was then slowly added to the β-cyclodextrin host solution at a mass ratio of 2:1 (β-cyclodextrin to plant-based essential oil).

[0094] During the dropwise addition, the system temperature was maintained at 40℃, and the mixture was continuously stirred to ensure full contact between the plant-based essential oils and β-cyclodextrin, forming an inclusion complex. After the dropwise addition was complete, the reaction was stirred for another 2 hours, followed by ultrasonic dispersion for 10 minutes. The reaction system was then cooled to 8℃ and allowed to stand for crystallization for 8 hours.

[0095] After crystallization, the reaction system was subjected to solid-liquid separation, the solid product was collected, washed with low-temperature aqueous ethanol, and then vacuum dried to constant weight at below 45°C. After pulverization and sieving, plant compound essential oil microcapsules were obtained.

[0096] The plant-based essential oil microcapsules obtained in this step are formed by encapsulating plant-based essential oils with β-cyclodextrin and are used for subsequent addition to the aging viscose solution.

[0097] S2. Preparation of modified regenerated cellulose fiber: Take the aging viscose solution as the spinning base liquid, add the plant composite essential oil microcapsules obtained in step S1 to the aging viscose solution, and add the plant composite essential oil microcapsules according to 3 wt% of the dry weight of regenerated cellulose in the viscose solution.

[0098] During the addition process, the temperature of the viscose system was controlled to not exceed 25°C, and a low-shear stirring method was used to disperse the plant compound essential oil microcapsules in the viscose solution. After dispersion, vacuum degassing was performed to obtain a viscose spinning solution containing plant compound essential oil microcapsules.

[0099] Modified regenerated cellulose short fibers containing plant compound essential oil microcapsules are obtained by wet spinning of viscose spinning solution, followed by stretching, washing, oiling, drying and cutting.

[0100] S3. Preparation of blended yarn and conductive core-spun yarn: Take the modified regenerated cellulose short fiber, cotton fiber and low melting point polyester core fiber obtained in step S2 and mix them in a mass percentage of 20:60:20 to obtain the blended fiber for the inner functional layer.

[0101] Among them, the low-melting-point polyester core-sheath fiber is a short fiber with a core-sheath structure. Its core layer is polyethylene terephthalate with a melting point of not less than 230°C; the sheath layer is modified polyester with a melting point of 110°C. This core-sheath structure allows the sheath layer to selectively melt during subsequent thermal densification treatment, while the core layer maintains its fiber support structure.

[0102] The above-mentioned mixed fibers are processed through opening, mixing, carding, drawing, roving and spinning to obtain blended yarn for inner functional layers.

[0103] A conductive filament is used as the core layer. The conductive filament is a carbon black composite conductive filament with a linear density of 20 dtex. A mixed fiber containing the modified regenerated cellulose short fiber, cotton fiber, and low-melting-point polyester core-sheath fiber is used as the fiber outer layer. The fiber outer layer is used to coat the conductive filament on a core-spun yarn spinning machine to obtain a conductive core-spun yarn.

[0104] In this embodiment, the mass percentage of the conductive filament core layer in the conductive core-spun yarn is 2 wt%.

[0105] S4. Preparation of composite functional fabric: The composite functional fabric is woven from the outer layer yarn, the inner functional layer blended yarn and the conductive core-spun yarn obtained in step S3.

[0106] In this embodiment, the outer layer is formed of polyester filament; the inner functional layer is formed of the blended yarn obtained in step S3; the conductive core-spun yarn is arranged periodically along the weft direction and embedded in the inner functional layer in such a way that one conductive core-spun yarn is set every 10 ordinary yarns, so that the conductive core-spun yarn forms a conductive network in the composite functional fabric.

[0107] Ordinary yarn is a blended yarn for the inner functional layer. It can also be made of natural fiber yarn, regenerated cellulose fiber yarn, synthetic fiber yarn, or yarn containing modified regenerated cellulose fiber and low melting point polyester core fiber, depending on the fabric structure requirements.

[0108] S5. Heat densification treatment: The composite functional fabric greige obtained in step S4 is preheated and relaxed at 100°C to make the yarn tension inside the fabric tend to be uniform.

[0109] After preheating, the composite functional fabric is fed into a hot press roller and hot-pressed at 135°C and 0.3 MPa linear pressure. This hot-pressing temperature is higher than the melting point of the sheath layer of the low-melting-point polyester core-sheath fiber but lower than the melting point of the core layer, causing selective melting of the sheath layer of the low-melting-point polyester core-sheath fiber.

[0110] During hot pressing, the molten sheath of the low-melting-point polyester core-sheath fibers is distributed at fiber intersections, yarn pores, and the contact area between the conductive core-spun yarn and adjacent yarns. After hot pressing, the fabric is cooled and set at 20°C to solidify the molten sheath, forming melt-bonded joints, thus obtaining the outer fabric layer.

[0111] The melting point bonding joint is composed of the melt-cured sheath of low-melting-point polyester core-sheath fibers, and keeps the modified regenerated cellulose fibers and conductive core-spun yarns in the predetermined organizational position of the composite functional fabric.

[0112] S6. Down jacket forming: Antibacterial treated duck down is used as the down filling material and filled into the lining fabric to form a down filling layer. The outer fabric, down filling layer and inner fabric obtained in step S5 are cut according to the down jacket pattern and then sewn together to form the down jacket, which is sample 2.

[0113] In this embodiment, plant-based composite essential oil microcapsules are fixed in modified regenerated cellulose fibers, conductive core-spun yarns are periodically arranged to form a conductive network, and low-melting-point polyester core-sheath fibers are heat-densified to form melting point adhesive nodes. The above structures together constitute the composite functional structure of the outer fabric.

[0114] Example 3:

[0115] This embodiment provides another down jacket with antibacterial, anti-mite, and antistatic functions. The basic structure of this embodiment is the same as that of Embodiment 1, both including an outer fabric, an inner fabric, and a down filling layer sandwiched between the outer and inner fabrics; the outer fabric is a composite functional fabric, which includes an outer outer layer, an inner functional layer, and a conductive network combined with the inner functional layer.

[0116] In this embodiment, the basic process steps that are the same as those in Example 1 will not be repeated. The main focus is on the raw material ratio, yarn structure, and thermal densification conditions that are different from those in Example 1.

[0117] S1. Preparation of plant compound essential oil microcapsules:

[0118] Camel thorn alkaline essential oil and clove oil were mixed at a mass ratio of 3:1 and stirred at room temperature for 30 minutes to obtain a plant compound essential oil.

[0119] β-Cyclodextrin was added to a 50% (v / v) aqueous ethanol solution and stirred at 60°C to dissolve, forming a β-cyclodextrin host solution. The plant-based essential oil was then slowly added to the β-cyclodextrin host solution at a mass ratio of 6:1 (β-cyclodextrin to plant-based essential oil).

[0120] During the dropwise addition, the system temperature was maintained at 60℃, and continuous stirring was performed to ensure full contact between the plant-based essential oils and β-cyclodextrin. After the dropwise addition was complete, the reaction was stirred for another 2 hours, followed by ultrasonic dispersion for 15 minutes to improve the homogeneity of the inclusion system. Subsequently, the reaction system was cooled to 15℃ and allowed to crystallize for 8 hours.

[0121] After crystallization, the reaction system was subjected to solid-liquid separation, the solid product was collected, washed with low-temperature aqueous ethanol, dried under vacuum at below 50°C to constant weight, and then pulverized and sieved to obtain plant compound essential oil microcapsules.

[0122] The resulting plant-based compound essential oil microcapsules were formed by encapsulating plant-based compound essential oils with β-cyclodextrin and were used for subsequent preparation of modified regenerated cellulose fibers.

[0123] S2. Preparation of modified regenerated cellulose fiber: Take the aging viscose solution as the spinning base liquid, and add the plant composite essential oil microcapsules obtained in step S1 to the aging viscose solution in batches. The amount of plant composite essential oil microcapsules added is calculated as 15 wt% of the dry weight of regenerated cellulose in the viscose solution.

[0124] Because the amount of plant-based essential oil microcapsules added in this embodiment is relatively high, the temperature of the viscose system is controlled to be no higher than 25°C during the addition process, and the low-shear stirring time is extended to ensure that the plant-based essential oil microcapsules are uniformly dispersed in the viscose solution. After dispersion, the viscose system is subjected to vacuum degassing treatment to obtain a viscose spinning solution containing plant-based essential oil microcapsules.

[0125] Modified regenerated cellulose short fibers containing plant compound essential oil microcapsules are obtained by wet spinning of viscose spinning solution, followed by stretching, washing, oiling, drying and cutting.

[0126] S3. Preparation of blended yarn and conductive core-spun yarn: Take the modified regenerated cellulose short fiber, cotton fiber and low melting point polyester core fiber obtained in step S2 and mix them in a mass percentage of 40:30:30 to obtain the blended fiber for the inner functional layer.

[0127] The low-melting-point polyester core-sheath fiber is a short fiber with a core-sheath structure. Its core layer is polyethylene terephthalate with a melting point of not less than 230°C, and the sheath layer is modified polyester with a melting point of 140°C. This core-sheath structure allows the low-melting-point polyester core-sheath fiber to form a melt-cured sheath during subsequent thermal densification treatment, while maintaining the fiber support morphology of the core layer.

[0128] The above-mentioned mixed fibers are processed through opening, mixing, carding, drawing, roving and spinning to obtain blended yarn for inner functional layers.

[0129] A conductive filament is used as the core layer, and the conductive filament is coated with a conductive polymer with a linear density of 50 dtex. A mixed fiber containing modified regenerated cellulose short fibers, cotton fibers, and low-melting-point polyester core-sheath fibers is used as the fiber outer layer. The conductive filament is fed into the spinning triangle area of ​​a core-spun yarn spinning machine, so that the fiber outer layer coats the conductive filament, thus producing a conductive core-spun yarn.

[0130] In this embodiment, the conductive filament core layer accounts for 10 wt% of the conductive core-spun yarn. The conductive filament core layer is located at the center of the conductive core-spun yarn, and the fiber outer sheath covers the outside of the conductive filament core layer to reduce the direct impact of the conductive material on the appearance of the fabric.

[0131] S4. Preparation of composite functional fabric: The composite functional fabric is woven from the outer layer yarn, the inner functional layer blended yarn and the conductive core-spun yarn obtained in step S3.

[0132] In this embodiment, the outer layer is formed of polyester filament; the inner functional layer is formed of the blended yarn obtained in step S3. The conductive core-spun yarn is periodically arranged in both the warp and weft directions, and is embedded in the inner functional layer at a ratio of one conductive core-spun yarn every three ordinary yarns, so that the conductive core-spun yarn forms a conductive network in the composite functional fabric.

[0133] Ordinary yarns use blended yarns for the inner functional layer. Depending on the fabric structure requirements, ordinary yarns can also be made of natural fiber yarns, regenerated cellulose fiber yarns, synthetic fiber yarns, or yarns containing modified regenerated cellulose fibers and low-melting-point polyester core-sheath fibers.

[0134] S5. Heat densification treatment: The composite functional fabric greige obtained in step S4 is preheated and relaxed at 110°C to make the yarn tension inside the fabric tend to be uniform.

[0135] After preheating, the composite functional fabric is fed into a hot press roller and hot-pressed at 145°C and 0.5 MPa linear pressure. This hot-pressing temperature is higher than the melting point of the sheath of the low-melting-point polyester core-sheath fiber but lower than the melting point of the core layer, causing selective melting of the sheath of the low-melting-point polyester core-sheath fiber while the core layer maintains its fiber support shape.

[0136] During the hot pressing process, the molten sheath of the low-melting-point polyester core-sheath fibers is distributed at fiber intersections, yarn pores, and the contact area between the conductive core-spun yarn and adjacent yarns. After hot pressing, the fabric is cooled and set at 25°C to solidify the molten sheath, forming melt-bonded joints, thus obtaining the outer fabric layer.

[0137] The melting point bonding nodes are composed of the melt-cured sheath of low-melting-point polyester core fibers and are distributed between modified regenerated cellulose fibers, between conductive core-spun yarns and adjacent yarns, and at the edges of the gaps between yarns, so that the modified regenerated cellulose fibers and conductive core-spun yarns are kept in the predetermined organizational position of the composite functional fabric.

[0138] S6. Down jacket forming: Use mite-proofed goose down as the down filling material and fill it into the lining fabric to form a down filling layer. After cutting the outer fabric, down filling layer and inner fabric obtained in step S5 according to the down jacket pattern, the down jacket is made by sewing and bonding to obtain sample 3.

[0139] In this embodiment, plant-based composite essential oil microcapsules are fixed within modified regenerated cellulose fibers. Conductive core-spun yarns are periodically arranged along both the warp and weft directions to form a conductive network. Low-melting-point polyester core-sheath fibers are heat-densified to form melting point bonding nodes. These structures collectively constitute the composite functional structure of the outer fabric.

[0140] Comparative Example 1: This comparative example provides a down jacket, whose basic structure and preparation method are basically the same as those in Example 1. The difference is that this comparative example does not use β-cyclodextrin to encapsulate the plant compound essential oil, but instead directly adds the plant compound essential oil to the aging adhesive solution.

[0141] Specifically, camel thorn alkaline essential oil and clove oil were mixed at a mass ratio of 2.5:1 and stirred at room temperature for 25 minutes to obtain a plant compound essential oil. Subsequently, without performing β-cyclodextrin inclusion reaction, cooling crystallization, solid-liquid separation, drying, and pulverization, the plant compound essential oil was directly added to a aging viscose solution.

[0142] The amount of plant-based compound essential oil added was calculated as 8 wt% of the dry weight of regenerated cellulose in the viscose solution. During the addition process, the temperature of the viscose system was controlled to not exceed 25°C, and low-shear stirring was used to disperse the plant-based compound essential oil in the viscose solution. After dispersion, the viscose system was vacuum degassed to obtain a viscose spinning solution containing the plant-based compound essential oil.

[0143] Modified regenerated cellulose short fibers containing plant compound essential oils are obtained by wet spinning of viscose spinning solution, followed by stretching, washing, oiling, drying and cutting.

[0144] Subsequently, referring to the method of Example 1, the modified regenerated cellulose short fiber, cotton fiber and low melting point polyester core fiber were mixed in a mass percentage of 35:45:20, and then spun, conductive core-spun yarn was prepared, composite functional fabric was woven, heat densification treatment was performed and down jacket was formed to obtain the down jacket of this comparative example, which is sample 4.

[0145] Comparative Example 1 was used to compare with Example 1 to investigate the retention of plant-based compound essential oils without β-cyclodextrin inclusion during spinning, heat treatment, and washing processes, and its effect on the persistence of their antibacterial and anti-mite properties.

[0146] Comparative Example 2: This comparative example provides a down jacket, whose basic structure and preparation method are basically the same as those in Example 1. The difference is that the plant essential oil microcapsules in this comparative example contain only camel thorn alkaline essential oil and do not contain clove oil.

[0147] Specifically, β-cyclodextrin was added to a 50% (v / v) aqueous ethanol solution and stirred at 45°C to dissolve, forming a β-cyclodextrin host solution. Camel thorn basic essential oil was then slowly added dropwise to the β-cyclodextrin host solution at a mass ratio of 4:1 (β-cyclodextrin to camel thorn basic essential oil). During the addition process, the system temperature was controlled at 45°C, and stirring was continuous to allow the camel thorn basic essential oil and β-cyclodextrin to form an inclusion complex.

[0148] After the addition was complete, the reaction mixture was stirred at 45°C for 2 h; then ultrasonically dispersed for 12 min, followed by stirring for another 30 min. The reaction system was then cooled to 10°C and allowed to crystallize for 8 h. After crystallization, the reaction system was subjected to solid-liquid separation, the solid product was collected, and washed with a small amount of low-temperature aqueous ethanol. The washed solid product was vacuum dried to constant weight below 45°C, then pulverized and sieved to obtain camel thorn alkaline essential oil microcapsules.

[0149] The obtained camel thorn alkaline essential oil microcapsules were added to a aging viscose solution, with the amount added calculated as 8 wt% of the dry weight of regenerated cellulose in the viscose solution. After dispersion, degassing, wet spinning, drawing, washing, oiling, drying, and cutting, modified regenerated cellulose short fibers containing camel thorn alkaline essential oil microcapsules were obtained.

[0150] Subsequently, following the method of Example 1, modified regenerated cellulose short fibers, cotton fibers, and low-melting-point polyester core fibers were mixed in a mass percentage ratio of 35:45:20, and blended yarns, conductive core-spun yarns, composite functional fabric greige fabrics, and outer fabrics were further prepared to obtain a down jacket, resulting in sample 5.

[0151] Comparative Example 2 was used to compare with Example 1 to examine the effects of using only camel thorn alkaline essential oil versus using a combination of camel thorn alkaline essential oil and clove oil on antibacterial and anti-mite properties when the microcapsule encapsulation method was the same.

[0152] Comparative Example 3: This comparative example provides a down jacket, whose basic structure and preparation method are basically the same as those of Example 1. The difference is that ordinary polyester staple fiber is used in this comparative example to replace the low melting point polyester core fiber in Example 1.

[0153] Specifically, plant-based composite essential oil microcapsules were prepared according to the method of Example 1, and the plant-based composite essential oil microcapsules were added to a aging viscose solution, dispersed, degassed, and wet-spun to obtain modified regenerated cellulose short fibers containing plant-based composite essential oil microcapsules.

[0154] Subsequently, the modified regenerated cellulose staple fiber, cotton fiber, and ordinary polyester staple fiber were mixed in a mass percentage ratio of 35:45:20 to obtain a mixed fiber for the inner functional layer. The ordinary polyester staple fiber is a non-core-sheath structure polyethylene terephthalate staple fiber, which does not have a selectively meltable low-melting-point sheath layer under the hot-pressing temperature conditions of Example 1.

[0155] The above-mentioned mixed fibers are processed through opening, mixing, carding, drawing, roving, and spinning to obtain a blended yarn for the inner functional layer. A conductive core-spun yarn is prepared according to the method of Example 1, and the blended yarn, conductive core-spun yarn, and outer layer yarn are woven into a composite functional fabric.

[0156] Subsequently, the composite functional fabric was preheated and relaxed at 105°C, then hot-pressed through hot rollers at 140°C and 0.4 MPa linear pressure, and finally cooled and set at 22°C to obtain the outer fabric. Because the ordinary polyester staple fibers in this comparative example do not have a low-melting-point sheath, it is difficult to form melt-point adhesive nodes composed of melted and solidified sheath material during the hot-pressing process.

[0157] Finally, the outer fabric, the duck down filling layer treated with antibacterial and anti-mite composite, and the inner fabric were cut and sewn according to the method of Example 1 to obtain a down jacket, which is Sample 6.

[0158] Comparative Example 3 was used to compare with Example 1 to examine the role of low-melting-point polyester core-sheath fibers in forming melting point bonding nodes, stabilizing the position of conductive core-spun yarns, and improving down-proof performance.

[0159] Comparative Example 4: This comparative example provides a down jacket, whose basic structure and preparation method are basically the same as those in Example 1. The difference is that this comparative example does not use periodically arranged conductive core-spun yarns, but instead uses an antistatic finishing method to give the fabric antistatic properties.

[0160] Specifically, plant-based composite essential oil microcapsules were prepared according to the method of Example 1, and the plant-based composite essential oil microcapsules were added to a aging viscose solution, dispersed, degassed, and wet-spun to obtain modified regenerated cellulose short fibers containing plant-based composite essential oil microcapsules.

[0161] Subsequently, modified regenerated cellulose short fibers, cotton fibers, and low-melting-point polyester core fibers are mixed in a mass percentage ratio of 35:45:20, and the blended yarn for the inner functional layer is produced through opening, mixing, carding, drawing, roving, and spinning processes.

[0162] In the fabrication process of composite functional fabric, conductive core-spun yarns are not inserted. Instead, the outer layer yarn and the inner functional layer yarn are blended to form the composite functional fabric. Subsequently, referring to the heat densification treatment conditions of Example 1, the composite functional fabric is preheated and relaxed at 105°C, then hot-pressed at 140°C and 0.4 MPa linear pressure by hot press rollers, and cooled and set at 22°C, so that the sheath of the low-melting-point polyester core-sheath fiber forms a molten solidified product, thus obtaining the outer fabric.

[0163] After heat densification treatment, the resulting outer fabric is impregnated with a finishing liquid containing a hydrophilic antistatic agent. After pre-drying and curing treatment, the antistatic agent is fixed on the surface of the outer fabric and in some yarn gaps, resulting in an antistatic finished outer fabric.

[0164] Finally, the outer fabric, the down filling layer treated with antibacterial and anti-mite composite, and the inner fabric were cut and sewn according to the method of Example 1 to obtain the down jacket of this comparative example, which is sample 7.

[0165] Comparative Example 4 is used to compare with Example 1 to examine the differences between the scheme of periodically arranging conductive core-spun yarns to form a conductive network and the antistatic finishing scheme in terms of antistatic retention after washing, friction and long-term use.

[0166] To verify the overall effectiveness of the technical solution of this invention, performance tests were conducted on the outer fabric samples prepared in Examples 1, 2, and 3, as well as Comparative Examples 1 to 4. Unless otherwise specified, all samples were placed under the same humidity conditioning conditions before testing, and were evaluated according to the same cutting size, the same testing environment, and the same testing procedure to reduce the influence of fabric weight, weave density, moisture content, and cutting direction on the test results.

[0167] To examine functional wash resistance, test points were set before washing and after 20 washes in this embodiment. Washing treatment can be performed according to GB / T 8629-2017 "Home Washing and Drying Procedures for Textile Testing";

[0168] Antibacterial performance testing can be conducted in accordance with GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3: Vibration method". Anti-mite performance testing can be conducted in accordance with GB / T 24253-2009 "Evaluation of anti-mite properties of textiles".

[0169] Antistatic performance testing can be conducted in accordance with GB / T 12703.4-2010 "Evaluation of electrostatic properties of textiles - Part 4: Resistivity".

[0170] The test for down-proof performance can be conducted in accordance with GB / T 12705.2-2024 "Textiles - Test Methods for Down-proof Performance - Part 2: Rotating Box Method".

[0171] Air permeability testing can be conducted in accordance with GB / T 5453-1997 "Textiles - Determination of Air Permeability of Fabrics" to evaluate the effect of heat densification treatment on the air permeability of fabrics.

[0172] To make the table results more intuitive, subsequent data tables will highlight the test results "before washing" and "after 20 washes".

[0173] The test results are shown in Table 1:

[0174]

[0175] As shown in Table 1, samples 1 to 3 maintained good comprehensive antibacterial, anti-mite, antistatic, and down-proof properties after 20 washes, indicating that the plant-based composite essential oil microcapsules, low-melting-point polyester core fiber dot-bonding structure, and conductive core-spun yarn conductive network used in this invention can form a good structural combination. Among them, sample 1 showed a relatively balanced performance in antibacterial, anti-mite, antistatic, down-proof, and breathability; sample 2 had a high breathability, indicating that acceptable comprehensive functions could still be obtained under relatively low functional component dosage and weak thermal densification conditions; sample 3 showed better performance in minimum inhibitory rate of bacteria, mite repellency rate, surface resistivity, and down-proof number, indicating that increasing the content of plant-based composite essential oil microcapsules, the configuration of conductive core-spun yarn, and the intensity of thermal densification is beneficial to enhancing the functional retention and structural density of the fabric, but its breathability is relatively reduced, indicating that the increased fabric densification will have a certain impact on breathability.

[0176] Compared to Sample 1, Sample 1 did not use β-cyclodextrin to encapsulate the plant-based essential oils; instead, the plant-based essential oils were directly added to the viscose system. Sample 1 exhibited certain antibacterial and anti-mite effects before washing, but after 20 washes, the minimum inhibitory rate of bacteria and the mite repellency rate decreased significantly, indicating that the direct blending of plant-based essential oils was prone to loss during washing and friction. This invention encapsulates plant-based essential oils with β-cyclodextrin to form microcapsules and fixes them within modified regenerated cellulose fibers, which is beneficial for improving the retention and wash resistance of plant active ingredients in the fiber system.

[0177] Compared to Sample 1, Sample 2 used only camel thorn alkaline essential oil without adding clove oil. The antibacterial and anti-mite properties of Sample 2 were lower than those of Sample 1 both before and after 20 washes. This indicates that while camel thorn alkaline essential oil alone can provide some functional benefits, its overall antibacterial and anti-mite performance is weaker than that of the combination of camel thorn alkaline essential oil and clove oil. Therefore, using camel thorn alkaline essential oil and clove oil to form a plant-based compound essential oil is beneficial for improving the overall antibacterial and anti-mite effects of down jacket fabrics.

[0178] Compared to Sample 1, Sample 3 uses ordinary polyester staple fiber instead of low-melting-point polyester core fiber. Although Sample 3 still has high air permeability, the number of down fibers escaping before and after washing is significantly higher than that of Samples 1 to 3. This indicates that ordinary polyester staple fiber is difficult to form a stable sheath-melting and solidifying point-bonding structure during heat densification treatment, and cannot effectively regulate the porosity between yarns and stabilize the fabric structure. This invention uses low-melting-point polyester core fiber, which selectively melts and solidifies the sheath during heat densification treatment. This allows for the formation of melt-bonding points at fiber intersections, yarn porosity, and the contact area between conductive core yarns and adjacent yarns, thereby helping to improve the down-proof performance and structural stability of the fabric.

[0179] Compared to sample 1, sample 4 does not use conductive core-spun yarns but instead employs an antistatic finishing process. Sample 4 exhibits some antistatic effect before washing, but its surface resistivity increases significantly after 20 washes. This indicates that relying solely on surface antistatic finishing makes it easy for antistatic components to migrate or detach during washing, leading to a decline in antistatic performance. This invention constructs a conductive network using periodically arranged conductive core-spun yarns and utilizes melting point bonding nodes formed by low-melting-point polyester core-sheath fibers to stabilize the position of the conductive core-spun yarns, thus improving the wash resistance and antistatic properties of the fabric.

[0180] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included within the protection scope of the present invention.

Claims

1. A down jacket with antibacterial, anti-mite, and antistatic functions, characterized in that, The down jacket includes an outer fabric, an inner fabric, and a down filling layer sandwiched between the outer fabric and the inner fabric. The outer fabric is a composite functional fabric, which includes at least an outer surface layer, an inner functional layer containing functional fibers, and a conductive network bonded to the inner functional layer. The conductive network is disposed between the outer surface layer and the inner functional layer. The functional fibers include modified regenerated cellulose fibers and low-melting-point polyester core-sheath fibers, with plant-based composite essential oil microcapsules immobilized in the modified regenerated cellulose fibers. The plant-based compound essential oil microcapsules are formed by encapsulating plant-based compound essential oils with β-cyclodextrin, including camel thorn alkaline essential oil and clove oil. The conductive network is formed by periodically arranged conductive core-spun yarns, which include a conductive filament core layer and a fiber outer layer covering the conductive filament core layer. The composite functional fabric has melt point bonding nodes formed by the solidified sheath of low melting point polyester core fibers. The melt point bonding nodes are distributed between modified regenerated cellulose fibers, between conductive core yarns and adjacent yarns, and at the edges of the pores between yarns, and keep the modified regenerated cellulose fibers and conductive core yarns in the predetermined structure position of the composite functional fabric. The down filling layer is made of duck or goose down that has undergone antibacterial treatment, anti-mite treatment, or a combination of antibacterial and anti-mite treatment.

2. The down jacket according to claim 1, characterized in that, The inner functional layer is a woven or knitted structure, and the yarn in the inner functional layer includes a blended yarn containing modified regenerated cellulose fibers and low-melting-point polyester core fibers.

3. The down jacket according to claim 2, characterized in that, The fiber components in the inner functional layer comprise, by mass percentage: 20–50 wt% modified regenerated cellulose fibers; 30–60 wt% of at least one of cotton fiber and unmodified regenerated cellulose fiber; 10–30 wt% low melting point polyester core-sheath fiber; The sum of the mass percentages of the above fiber components is 100 wt%.

4. The down jacket according to claim 3, characterized in that, The content of the plant compound essential oil microcapsules in the modified regenerated cellulose fiber is 3–15 wt% of the dry weight of the modified regenerated cellulose fiber; In the plant compound essential oil microcapsules, the mass ratio of β-cyclodextrin to plant compound essential oil is 2:1–6:1; In the plant compound essential oil, the mass ratio of camel thorn alkaline essential oil to clove oil is 2:1–3:

1.

5. The down jacket according to claim 4, characterized in that, The low-melting-point polyester core-sheath fiber is a short fiber with a core-sheath structure. The core layer of the low-melting-point polyester core-sheath fiber is polyethylene terephthalate with a melting point of not less than 230°C, and the sheath layer is modified polyester with a melting point of 110–140°C.

6. The down jacket according to claim 5, characterized in that, The melt point bonding node is formed through the following thermal densification treatment: Preheat and relax the composite functional fabric at 100–110℃. It is then hot-pressed through hot press rollers at a temperature of 135–145℃ and a linear pressure of 0.3–0.5 MPa; Then cool and set at 20–25℃; After thermal densification, the sheath of the low-melting-point polyester core-sheath fiber undergoes selective melting, while the core layer of the low-melting-point polyester core-sheath fiber maintains its fiber support shape and forms melting point adhesion points at fiber intersections, yarn pores, and contact areas between conductive core-spun yarns and adjacent yarns.

7. The down jacket according to claim 6, characterized in that, The conductive filament core layer is selected from at least one of carbon black composite conductive filament, metal conductive filament, and conductive polymer coated filament; The linear density of the conductive filament core layer is 20–50 dtex; The conductive filament core layer has a mass percentage of 2–10 wt% in the conductive core-spun yarn.

8. The down jacket according to claim 7, characterized in that, The conductive core-spun yarns are arranged periodically along the warp and weft directions or both the warp and weft directions; The conductive core-spun yarns are arranged such that one conductive core-spun yarn is placed every 3-10 yarns. The yarn includes at least one of natural fiber yarn, regenerated cellulose fiber yarn, synthetic fiber yarn, and blended yarn containing modified regenerated cellulose fiber and / or low-melting-point polyester core fiber.

9. The down jacket according to claim 8, characterized in that, The outer and / or inner fabrics also include at least one of chitosan, quaternary ammonium salt antibacterial agents and hydrophilic antistatic agents fixed by post-treatment. The finishing process includes padding, pre-drying, and curing.

10. A method for preparing a down jacket with antibacterial, anti-mite, and antistatic functions as described in any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Camel thorn alkaline essential oil and clove oil are mixed to obtain plant compound essential oil. β-cyclodextrin is dissolved in an aqueous ethanol solution to form a host solution. The plant compound essential oil is added to the host solution at 40–60°C and an inclusion reaction is carried out under stirring or ultrasonic conditions. After cooling crystallization, solid-liquid separation, washing, drying and pulverizing, plant compound essential oil microcapsules are obtained. S2. Add plant compound essential oil microcapsules to a mature viscose solution, and then disperse, degas and wet spin to obtain modified regenerated cellulose fibers containing plant compound essential oil microcapsules. S3. The modified regenerated cellulose fiber, low melting point polyester core fiber, cotton fiber and / or unmodified regenerated cellulose fiber are mixed and spun to obtain a blended yarn, and the conductive filament is used as the core layer and the conductive filament is covered with a fiber outer layer to obtain a conductive core-spun yarn. S4. Prepare a composite functional fabric using the blended yarn and the conductive core-spun yarn, such that the conductive core-spun yarn is periodically arranged in the composite functional fabric to form a conductive network. S5. In the temperature range above the melting point of the sheath of the low-melting-point polyester core fiber and below the melting point of the core layer, the composite functional fabric is subjected to hot pressing and cooling treatment, so that the sheath of the low-melting-point polyester core fiber melts and solidifies, and melt point adhesive nodes are formed between the modified regenerated cellulose fibers, between the conductive core yarn and adjacent yarns, and at the edges of the interpores between the yarns, to obtain the outer fabric. S6. Duck or goose down that has undergone antibacterial treatment, anti-mite treatment, or a combination of antibacterial and anti-mite treatment is used as the down filling layer. The outer fabric, down filling layer, and inner fabric are cut and then sewn, laminated, or a combination of sewing and lamination to produce a down jacket.

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