A down jacket with double-layer down-locking structure

Abstract

The present invention relates to a down jacket with a double-layer down-locking structure. A second down is filled between a primary down-locking layer and a secondary down-locking layer. When the second down is processed, a part of the second down enters the interior of an arc-shaped groove and fills the interior space of the arc-shaped groove. At this time, the second down is sealed in the interior of the arc-shaped groove, and the grasping fiber is located at the opening of the arc-shaped groove, which can effectively ensure the uniformity of the thermal insulation of the primary down-locking layer. At the same time, by imitating the "fixing posture of dandelion seeds", the root of the primary down is adhered to the interior of the air vents, and the down fibers of the primary down are stuck in the interior of the cracked part. The primary down cross-distributed and evenly located in the cracked part will form a "protective layer" with a down-shaped mesh structure at the secondary down-locking layer. On the one hand, the primary down located in the diamond-shaped liner is not easy to pass through the "protective layer", which has the effect of preventing down from drilling.

Description

Technical Field

[0001] The invention belongs to the technical field of down jackets, and in particular relates to a down jacket with a double-layer down-locking structure. Background Art

[0002] Down jackets are jackets filled with down, with a large and rounded shape. Down jackets are usually made of duck down, with some small feathers mixed in. The duck down is cleaned, sterilized at high temperature, and then filled into clothes to become down jackets. Down jackets have the best warmth retention. They are mostly worn by people in cold regions and are also commonly used by polar expedition personnel.

[0003] Down is a mixture of "feather" and "down". Feather is the hair piece, which plays a supporting role in down and allows the down to rebound quickly; while down is the down bud, which is the essence and value of down. Down bud is a three-dimensional sphere, consisting of a down core and many radiating down fibers, similar to dandelions. Down fibers are composed of thousands of tiny scales, each of which is hollow. There are many diamond nodes on each down fiber, which are full of stagnant air. At the same time, a large amount of air is fixed between the down fibers and the down buds. This is the secret of why down is so warm.

[0004] The existing down jackets use double-layer fabrics to seal the down in the liner. However, due to the need to meet the air permeability of the down jacket, the holes in the fabric will increase. At the same time, when the double-layer fabric is sewn by a sewing machine, holes will appear at the seams of the double-layer fabric. As the air in the liner circulates, the down is easy to float out through the holes, resulting in a significant reduction in the down content in the liner. At the same time, as the down jacket is squeezed and washed, the down is unevenly distributed in the liner, resulting in poor local warmth retention of the down jacket. In addition, the down jacket has poor ductility and is prone to scratches, which causes the fabric of the down jacket to be damaged and the down to float out. Summary of the invention

[0005] The purpose of the present invention is to provide a down jacket with a double-layer down-locking structure in order to solve the above-mentioned problem.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] A down jacket with a double-layer down-locking structure, comprising an inner fabric and an outer fabric, wherein a rhombus-shaped liner is formed between the inner fabric and the outer fabric by hot pressing, and four groups of rhombus-shaped cavities are formed on the rhombus-shaped liner by cross stitching, and first down is arranged in each of the four groups of rhombus-shaped cavities;

[0008] The rhombus has good deformability and is formed into a rhombus liner through hot pressing. When the fabric is pulled, the rhombus liner can easily extend along its diagonal direction. It has good tensile resistance and can effectively prevent external pulling from causing damage to the rhombus liner and causing the first down inside the rhombus liner to overflow, thereby making the overall fabric of the down jacket and the rhombus liner have good ductility.

[0009] The inner fabric and the outer fabric have the same structure, and the outer fabric includes a surface layer, an extension layer, a heat preservation layer, a primary down lock layer and a secondary down lock layer from the outside to the inside, wherein a second down is arranged between the primary down lock layer and the secondary down lock layer, and an arc-shaped groove is formed on one side surface close to the connection side of the primary down lock layer and the secondary down lock layer, and a gripping fiber is arranged at the opening of the arc-shaped groove;

[0010] By filling the second down between the primary lock down layer and the secondary lock down layer, when the second down is processed, a part of the second down enters the interior of the arc-shaped groove and fills the internal space of the arc-shaped groove. At this time, the second down is sealed inside the arc-shaped groove, and the grasping fiber is located at the opening of the arc-shaped groove. On the one hand, it can effectively prevent the second down from overflowing from the arc-shaped groove, causing uneven thermal insulation of the primary lock down layer. On the other hand, the grasping fiber is provided in several groups at the opening of the arc-shaped groove, and all of them are claw-shaped and face the center of the arc-shaped groove. It can be seen that during the processing of the entire fabric, the second down can be evenly grasped and attached to the inner surface of the first lock down layer, which is convenient for the integrity of the entire fabric processing. On the other hand, the root of the down is easy to adhere to the grasping fiber, which is convenient for the root of the down to be firmly locked on the primary lock down layer.

[0011] In addition, by filling the second down between the primary lock down layer and the secondary lock down layer, the warmth retention of the overall inner and outer fabrics is increased. On the other hand, since there are gaps between the second downs, the air permeability is also excellent. Furthermore, corresponding to the above-mentioned extension layer, when the extension layer is pulled, the second downs are interlaced with each other and sealed in the primary lock down layer and the secondary lock down layer, so it has good ductility. At the same time, according to the elastic restoration of the extension layer and the second down, it is easy to quickly restore.

[0012] At the same time, in connection with the preparation method of the down jacket described below, in the following S5, heat expansion powder is mixed and added to the composite lock down fabric, and the composite fabric with heat expansion and cold contraction is formed by stirring, dehydrating, and air suction drying. When the primary lock down layer is heated and expanded, the attached fibers are in an open state. At this time, the second down in the arc-shaped groove will expand in a natural state. At this time, the overall thickness of the inner layer fabric and the outer layer fabric is enhanced. While keeping warm, it is convenient for the user to generate a small amount of heat in the cold, that is, to avoid a small amount of heat loss. At the same time, when the second down expands, the gap between the second down will increase, so that the air permeability will be greatly enhanced.

[0013] The secondary down locking layer is provided with ventilation holes inside, arc-shaped recessed parts are provided at the ends of the ventilation holes, and a plurality of groups of split parts for the down fibers of the primary down to pass through are provided inside the arc-shaped recessed parts.

[0014] Among them, the primary down is freely arranged inside the rhombus liner, and by imitating the "fixed situation of dandelion seeds", the roots of the primary down are adhered to the inside of the air vents, and the down fibers of the primary down are stuck inside the cracked part. The primary down that is cross-distributed and evenly located in the cracked part will form a "protective layer" with a down-shaped mesh structure at the secondary down-locking layer. On the one hand, the primary down located in the rhombus liner is not easy to pass through the "protective layer", which has the effect of preventing down from drilling. On the other hand, when the down jacket is washed, rubbed and externally dried, the "protective layer" itself has good rubbing resistance, and the friction between the primary down in the inner layer and the "protective layer" is small, so that during the drying process of the down jacket, the "protective layer" is easy to quickly restore its fluffiness. At the same time, the primary down in the inner layer is evenly distributed on the inner side of the "protective layer" and quickly becomes fluffy, which can effectively prevent the primary down of the down jacket from being evenly distributed in the rhombus cavity.

[0015] When the secondary down-locking layer shrinks when it is cold, on the one hand, the cross-section of the vent holes shrinks, reducing the heat loss. At the same time, the cross-section of the gap in the cracked part of the vent holes is reduced, making it easier to lock the primary down firmly inside the cracked part, greatly improving the warmth retention.

[0016] It should be noted here that the primary down on the "protective layer" alternates with the primary down set in the inner layer. If the primary down in the ventilation hole is detached from the ventilation hole due to force majeure, the primary down in the diamond-shaped liner will fill the empty ventilation holes one after another, so that the warmth retention of the down jacket is always in good condition when it is used, which greatly extends the service life of the down jacket.

[0017] As a further optimization scheme of the present invention, in terms of mass percentage: the surface layer includes 30-45% nylon and 55-70% spandex, and the inner surface of the surface layer is provided with first wrinkles.

[0018] As a further optimization scheme of the present invention, in terms of mass percentage: the stretch layer is woven from 75-80% polyurethane elastic fibers and 20-25% elastic rubber, and second wrinkles are formed on the surface of the stretch layer.

[0019] As a further optimization scheme of the present invention, in terms of mass percentage: the thermal insulation layer is blended from 65-75% wool and 25-35% acrylic fibers, and a third fold is formed on the outer surface of the thermal insulation layer.

[0020] As a further optimization scheme of the present invention, calculated by mass percentage: the primary velvet locking layer includes 35-45% thermal expansion powder, 45-60% polyester fiber fabric, 2-5% composite glue and 3-5% stabilizer, and the secondary velvet locking layer includes 30-40% thermal expansion powder, 55-60% polyester fiber fabric, 2-5% composite glue and 3-5% stabilizer.

[0021] As a further optimization solution of the present invention, the thermal expansion powder is made of epoxy resin, and the stabilizer is rubber.

[0022] As a further optimization solution of the present invention, the grasping fibers are provided in a plurality of groups at the opening of the arc-shaped groove, and the grasping fibers are made of polyester fibers.

[0023] As a further optimization scheme of the present invention, the preparation method of the down jacket with a double-layer down-locking structure comprises:

[0024] S1. According to the proportion, nylon and spandex are woven into a surface layer through a multi-arm faucet loom, and polyurethane elastic fiber is used as weft yarn and elastic rubber is used as warp yarn; after the polyurethane elastic fiber is sized, it is woven with high density to form an extension layer, and then wool is used as filament yarn and acrylic fiber is used as short fiber, and a shuttle loom is used to interlace to form a thermal insulation layer;

[0025] S2, placing the above-formed stretch layer between the surface layer and the thermal insulation layer, and stacking them to form a composite fabric, using an embroidery machine to quilt the composite fabric along its surface, and then using a creasing machine to creasing the composite fabric at high temperature, so that the elastic rubber in the stretch layer shrinks and sets, and forms a second fold on the surface of the stretch layer, and then forms the stretch fabric;

[0026] S3, taking the above-mentioned stretch fabric, and laying the polyester fiber fabric on the inner surface of the stretch fabric, selecting a steel plate with raised points on the surface, heating the steel plate with a hot press, and hot pressing the steel plate on the polyester fiber fabric, cooling for 20-30 minutes to form an arc-shaped groove, and then using an awl to pick open the polyester fiber at the opening of the arc-shaped groove to form a grasping fiber, and through the above-mentioned process, a layer of lock velvet fabric is formed;

[0027] S4, taking the above-mentioned layer of lock velvet fabric and the secondary lock velvet layer, and using a sewing machine to form a plurality of pockets with cavities, using a filling machine to flush the second down into the pockets, and using a punching machine to continuously pressurize for 1-1.5 hours to form a composite lock velvet fabric;

[0028] S5, taking the composite lock velvet fabric and placing it in a mixing barrel, and adding a certain amount of water, thermal expansion powder, composite glue and stabilizer into the mixing barrel, heating and mixing for 20-30 minutes, and forming an overall fabric, dehydrating the overall fabric, air-drying it, and artificially shaping it to form the outer fabric;

[0029] S6. Take the outer layer fabric and the inner layer fabric and sew them into a diamond-shaped liner using a sewing machine, sew them on the diamond-shaped liner through cross stitches to form four groups of diamond-shaped cavities, and flush the first down into the four groups of diamond-shaped cavities to finally form the down jacket.

[0030] As a further optimization scheme of the present invention, in S3, the heating temperature range of the hot press is within the range of 85-200°C, and the pressing time range of the hot press is within the range of 1-1.5h.

[0031] As a further optimization scheme of the present invention, in S5, the heating temperature range in the stirring barrel is 90-100°C.

[0032] The beneficial effects of the present invention are: the down jacket with a double-layer down-locking structure,

[0033] (1) A diamond-shaped liner is provided. When the fabric is pulled, the diamond-shaped liner is easily extended along its diagonal direction. The diamond-shaped liner has good anti-pulling property and can effectively prevent external pulling from causing damage to the diamond-shaped liner and causing the first down inside the diamond-shaped liner to overflow. Thus, the overall fabric of the down jacket and the diamond-shaped liner have good ductility.

[0034] By filling the second down between the primary lock down layer and the secondary lock down layer, when the second down is processed, a part of the second down enters the interior of the arc-shaped groove and fills the internal space of the arc-shaped groove. At this time, the second down is sealed inside the arc-shaped groove, and the grasping fiber is located at the opening of the arc-shaped groove. On the one hand, it can effectively prevent the second down from overflowing from the arc-shaped groove, causing uneven thermal insulation of the primary lock down layer. On the other hand, the grasping fiber is provided in several groups at the opening of the arc-shaped groove, and all of them are claw-shaped and face the center of the arc-shaped groove. It can be seen that during the processing of the entire fabric, the second down can be evenly grasped and attached to the inner surface of the first lock down layer, which is convenient for the integrity of the entire fabric processing. On the other hand, the root of the down is easy to adhere to the grasping fiber, which is convenient for the root of the down to be firmly locked on the primary lock down layer.

[0035] In addition, by filling the second down between the primary lock down layer and the secondary lock down layer, the warmth retention of the overall inner and outer fabrics is increased. On the other hand, since there are gaps between the second downs, the air permeability is also excellent. Furthermore, corresponding to the above-mentioned extension layer, when the extension layer is pulled, the second downs are interlaced with each other and sealed in the primary lock down layer and the secondary lock down layer, so it has good ductility. At the same time, according to the elastic restoration of the extension layer and the second down, it is easy to quickly restore.

[0036] (2) At the same time, in connection with the preparation method of the down jacket described below, in the following S5, heat expansion powder is mixed and added to the composite lock down fabric, and the composite fabric with heat expansion and cold contraction is formed by stirring, dehydrating, and air suction drying. When the primary lock down layer expands due to heat, the attached fibers are in an open state. At this time, the second down in the arc-shaped groove will expand in a natural state. At this time, the overall thickness of the inner layer fabric and the outer layer fabric is enhanced. While keeping warm, it is convenient for the user to generate a small amount of heat in the cold, that is, to avoid a small amount of heat loss. At the same time, when the second down expands, the gaps between the second down will increase, so that the air permeability will be greatly enhanced.

[0037] By imitating the "fixing situation of dandelion seeds", the roots of the primary down are adhered to the inside of the air vents, and the down fibers of the primary down are stuck inside the cracked part. The primary down that is cross-distributed and evenly located in the cracked part will form a "protective layer" with a down-shaped mesh structure at the secondary down-locking layer. On the one hand, the primary down located in the diamond-shaped liner is not easy to pass through the "protective layer", which has the effect of preventing down from drilling. On the other hand, when the down jacket is washed, rubbed and externally dried, the "protective layer" itself has good rubbing resistance, and the friction between the primary down in the inner layer and the "protective layer" is small, so that during the drying process of the down jacket, the "protective layer" is easy to quickly restore its fluffiness. At the same time, the primary down in the inner layer is evenly distributed on the inner side of the "protective layer" and quickly becomes fluffy, which can effectively prevent the primary down of the down jacket from being evenly distributed in the diamond-shaped cavity.

[0038] When the secondary down-locking layer shrinks when it is cold, on the one hand, the cross-section of the vent holes shrinks, reducing the heat loss. At the same time, the cross-section of the gap in the cracked part of the vent holes is reduced, making it easier to lock the primary down firmly inside the cracked part, greatly improving the warmth retention.

[0039] (3) It should be noted that the primary down on the "protective layer" and the primary down on the inner layer are alternately placed. If the primary down in the ventilation hole is separated from the ventilation hole due to force majeure, the primary down in the diamond-shaped liner will be filled in the vacant ventilation hole. This ensures that the warmth retention of the down jacket is always in good condition when it is used, greatly extending the service life of the down jacket.

[0040] (4) Furthermore, by providing a secondary lock velvet layer and a primary lock velvet layer, the secondary lock velvet layer and the primary lock velvet layer are made of the same material, the difference lies in the content of the thermal expansion powder, and the content of the thermal expansion powder in the secondary lock velvet layer is lower than that in the primary lock velvet layer. Therefore, the expansion deformation of the secondary lock velvet layer is smaller than that of the primary lock velvet layer. The secondary lock velvet layer matches the ductility layer and has good ductility. The degree of ductility is gradient, thereby avoiding damage to the fabric caused by pulling.

[0041] Since there is a difference in deformation between the secondary lock down layer and the primary lock down layer, a certain amount of relative sliding distance will occur between the secondary lock down layer and the primary lock down layer, and at this time, the second down will be rubbed between the secondary lock down layer and the primary lock down layer, so that the second down will expand rapidly, and the warmth retention will be good. Moreover, the expanded second down will have a firmer contact with the attached fiber, and the tear resistance will be good.

[0042] At the same time, due to the ventilation holes in the secondary down locking layer, when the secondary down locking layer expands when heated and contracts when cooled, the cross-sectional deformation of the ventilation holes is small. Therefore, while ensuring breathability, it can effectively prevent the primary down from passing through the ventilation holes, avoiding the phenomenon of down drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of a partial cross-sectional structure of a down jacket of the present invention;

[0044] Figure 2 It is a schematic diagram of the main cross-sectional structure of the diamond-shaped inner container of the present invention;

[0045] Figure 3 It is a schematic diagram of the front cross-sectional structure of the rhombus inner liner of the present invention;

[0046] Figure 4 This is a schematic diagram of the main structure of the rhombus-shaped inner liner arrangement of the present invention;

[0047] Figure 5 It is a schematic side cross-sectional structure diagram of the inner layer fabric and the outer layer fabric of the present invention being connected;

[0048] Figure 6 It is a schematic diagram of the internal cross-sectional structure of the outer fabric of the present invention;

[0049] Figure 7 The present invention Figure 6 Enlarged structural diagram at A in the middle.

[0050] In the figure: 1. Inner fabric; 2. Outer fabric; 21. Surface layer; 22. Extension layer; 23. Insulation layer; 24. Primary down lock layer; 25. Secondary down lock layer; 26. Arc-shaped groove; 27. Grasping fiber; 28. Breathable hole; 29. ​​Cracked part; 3. Diamond-shaped liner; 4. First down; 5. Diamond-shaped cavity. DETAILED DESCRIPTION

[0051] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0052] Example 1

[0053] like Figure 1-2 As shown, a down jacket with a double-layer down-locking structure comprises an inner fabric 1 and an outer fabric 2, a rhombus-shaped liner 3 is formed between the inner fabric 1 and the outer fabric 2 by hot pressing, four groups of rhombus-shaped cavities 5 are formed on the rhombus-shaped liner 3 by cross-sewing, and first down 4 is arranged in each of the four groups of rhombus-shaped cavities 5;

[0054] like Figure 2-4 As shown, the rhombus has good deformability, and after hot pressing, a rhombus-shaped liner 3 is formed. Figure 3 When pulled in the X direction, the diamond liner 3 is easily extended along its diagonal direction. At this time, the X direction can be extended, and the Y direction is compressed, which is convenient for the overall deformation of the diamond liner 3. It has good tensile resistance and can effectively prevent external pulling from causing damage to the diamond liner 3 and causing the first down 5 inside the diamond liner 3 to overflow, so that the overall fabric of the down jacket and the diamond liner 3 have good ductility.

[0055] like Figure 6 As shown, the inner fabric 1 and the outer fabric 2 have the same structure, and the outer fabric 2 includes a surface layer 21, an extension layer 22, a heat preservation layer 23, a primary down lock layer 24 and a secondary down lock layer 25 from the outside to the inside, wherein a second down 6 is provided between the primary down lock layer 24 and the secondary down lock layer 25, and an arc groove 26 is formed on one side surface close to the connection side of the primary down lock layer 24 and the secondary down lock layer 25, and a grasping fiber 27 is provided at the opening of the arc groove 26;

[0056] By filling the first lock down layer 24 and the second lock down layer 25 with the second down 6, a part of the second down 6 enters the arc-shaped groove 26 during processing and fills the inner space of the arc-shaped groove 26. At this time, the second down 6 is sealed inside the arc-shaped groove 26, and the grasping fiber 27 is located at the opening of the arc-shaped groove 26. On the one hand, it can effectively prevent the second down 6 from overflowing from the arc-shaped groove 26 and causing uneven heat preservation of the first lock down layer 24. On the other hand, the grasping fiber 27 is provided with several groups at the opening of the arc-shaped groove 26, and all of them are claw-shaped and face the center of the arc-shaped groove 26. It can be seen that during the processing of the whole fabric, the second down 6 can be evenly grasped and attached to the inner surface of the first lock down layer 24, which is convenient for the integrity of the whole fabric processing. On the other hand, the root of the down is easy to adhere to the grasping fiber 27, which is convenient for the root of the down to be firmly locked on the first lock down layer 24.

[0057] In addition, by filling the second down 6 between the primary lock down layer 24 and the secondary lock down layer 25, the warmth retention of the overall inner fabric 1 and the outer fabric 2 is increased. On the other hand, since there are gaps between the second down 6, the air permeability is also excellent. Furthermore, corresponding to the above-mentioned extension layer 22, when the extension layer 22 is pulled, the second down 6 is interlaced with each other and sealed in the primary lock down layer 24 and the secondary lock down layer 25, so it has good ductility. At the same time, according to the elastic restoration of the extension layer 22 and the second down 6, it is easy to quickly restore.

[0058] At the same time, in connection with the preparation method of the down jacket described below, in the following S5, heat expansion powder is mixed and added to the composite lock down fabric, and the composite fabric with heat expansion and cold contraction is formed by stirring, dehydrating, and air suction drying. When the primary lock down layer 24 is heated and expanded, the grasping fiber 27 is in an open state. At this time, the second down 6 in the arc-shaped groove 26 will expand in a natural state. At this time, the overall thickness of the inner layer fabric 1 and the outer layer fabric 2 is enhanced. While keeping warm, it is convenient for the user to generate a small amount of heat in the cold, that is, to avoid a small amount of heat loss. At the same time, when the second down 6 expands, the gap between the second down 6 will increase, so that the air permeability will be greatly enhanced;

[0059] like Figure 7 As shown, the secondary down locking layer 25 is provided with air holes 28 inside, the ends of the air holes 28 are provided with arc-shaped recessed portions, and the inside of the arc-shaped recessed portions are provided with a plurality of groups of split portions 29 for the down fibers of the primary down 4 to pass through.

[0060] like Figure 5As shown, the primary down 4 is freely arranged inside the rhombus liner 3, and the root of the primary down 4 is adhered to the inside of the air vent 28 by imitating the "fixed situation of dandelion seeds", and the down fibers of the primary down 4 are stuck inside the cracked part 29. The primary down 4 cross-distributed and evenly located in the cracked part 29 will form a "protective layer" with a velvet mesh structure at the secondary lock down layer 25. On the one hand, the primary down 4 located in the rhombus liner 3 is not easy to pass through the "protective layer", which has the effect of preventing down from drilling. On the other hand, when the down jacket is washed, rubbed and externally dried, the "protective layer" itself has good rubbing resistance, and the friction between the primary down 4 in the inner layer and the "protective layer" is small, so that the "protective layer" is easy to quickly restore the fluffyness during the drying process of the down jacket. At the same time, the primary down 4 in the inner layer is evenly distributed on the inner side of the "protective layer" and quickly becomes fluffy, which can effectively prevent the primary down 4 of the down jacket from being evenly distributed in the rhombus cavity 5.

[0061] When the secondary down-locking layer 25 contracts when exposed to cold, on the one hand, the hole cross-section of the vent 28 contracts, reducing the heat loss. At the same time, the gap cross-section in the crack 29 in the vent 28 is reduced, making it easier to lock the primary down 4 firmly inside the crack 29, greatly improving the warmth retention.

[0062] It should be noted here that the primary down 4 on the "protective layer" and the primary down 4 set in the inner layer are alternated. The primary down 4 located in the ventilation hole 28 is rubbed, dragged, and stepped on due to force majeure, causing the primary down 4 to detach from the ventilation hole 28. At this time, the primary down 4 located in the diamond-shaped liner 3 will be successively filled in the empty ventilation holes 28, so that the warmth retention of the down jacket is always in good condition when it is used, which greatly extends the service life of the down jacket.

[0063] By mass percentage: the surface layer 21 includes 45% nylon and 55% spandex, and the inner surface of the surface layer 21 is provided with first wrinkles.

[0064] By mass percentage: the extension layer 22 is woven from 80% polyurethane elastic fibers and 20% elastic rubber, and second wrinkles are formed on the surface of the extension layer 22 .

[0065] By mass percentage: the thermal insulation layer 23 is blended from 75% wool and 25% acrylic fibers, and a third fold is formed on the outer surface of the thermal insulation layer 23 .

[0066] Calculated by mass percentage: the primary velvet lock layer 24 includes 45% thermal expansion powder, 50% polyester fiber fabric, 2% composite glue and 3% stabilizer, or includes 40% thermal expansion powder, 55% polyester fiber fabric, 2% composite glue and 3% stabilizer, and the secondary velvet lock layer 25 includes 38% thermal expansion powder, 55% polyester fiber fabric, 4% composite glue and 3% stabilizer, or includes 30% thermal expansion powder, 60% polyester fiber fabric, 5% composite glue and 5% stabilizer.

[0067] Among them, the secondary lock velvet layer 25 and the primary lock velvet layer 24 are made of the same material, and the difference lies in the content of the thermal expansion powder. The content of the thermal expansion powder in the secondary lock velvet layer 25 is lower than that in the primary lock velvet layer 24. Therefore, the expansion deformation of the secondary lock velvet layer 25 is smaller than that of the primary lock velvet layer 24. The secondary lock velvet layer 25 matches the extension layer 22 and has good ductility. The degree of ductility is gradient, thereby avoiding damage to the fabric due to pulling.

[0068] Since there is a difference in deformation between the secondary lock down layer 25 and the primary lock down layer 24, a certain amount of relative sliding distance will occur between the secondary lock down layer 25 and the primary lock down layer 24, and at this time, the second down 6 will be rubbed between the secondary lock down layer 25 and the primary lock down layer 24, so that the second down 6 will expand rapidly, and the warmth retention is good. Moreover, the expanded second down 6 is more firmly in contact with the grasping fiber 27, and the tear resistance is good.

[0069] At the same time, since the secondary down locking layer 25 has the air holes 28, when the secondary down locking layer 25 expands when heated and contracts when cooled, the cross-sectional deformation of the air holes 28 is small. Therefore, while ensuring ventilation, it can effectively prevent the primary down 4 from passing through the air holes 28, avoiding the phenomenon of down drilling.

[0070] Thermal expansion powder is made of epoxy resin and stabilized by rubber.

[0071] A plurality of groups of grabbing fibers 27 are provided at the opening of the arc-shaped groove 26 , and the grabbing fibers 27 are made of polyester fibers.

[0072] The preparation method of the down jacket with a double-layer down-locking structure comprises:

[0073] S1. According to the proportion, nylon and spandex are woven into a surface layer 21 through a multi-arm loom, and polyurethane elastic fiber is used as weft yarn and elastic rubber is used as warp yarn; after the polyurethane elastic fiber is sized, it is woven with high density to form an extension layer 22, and then wool is used as filament yarn and acrylic fiber is used as short fiber, and a shuttle loom is used to interlace to form a thermal insulation layer 23;

[0074] S2, placing the above-formed extension layer 22 between the surface layer 21 and the thermal insulation layer 23, and stacking them to form a composite fabric, using an embroidery machine to quilt the composite fabric along its surface, and then using a creasing machine to creasing the composite fabric at high temperature, so that the elastic rubber in the extension layer 22 shrinks and sets, and a second fold is formed on the surface of the extension layer 22, and the extension fabric is formed;

[0075] S3, take the above-mentioned stretch fabric, and lay the polyester fiber fabric flat on the inner surface of the stretch fabric, select a steel plate with raised points on the surface, use a hot press to heat the steel plate, the heating temperature of the hot press is 110°C, the pressing time of the hot press is 1h, and the steel plate is hot pressed on the polyester fiber fabric, after cooling for 20 minutes, an arc groove 26 is formed, and then the polyester fiber at the opening of the arc groove 26 is picked up with an awl, and the grasping fiber 27 is formed, and after the above process, a layer of lock velvet fabric is formed;

[0076] S4, taking the above-mentioned layer of lock velvet fabric and the secondary lock velvet layer 25, and using a sewing machine to form a plurality of pockets with cavities, using a filling machine to flush the second down 6 into the pockets, and using a punching machine to continuously pressurize for 1-1.5 hours to form a composite lock velvet fabric;

[0077] S5, taking the composite lock velvet fabric and placing it in a mixing barrel, and adding a certain amount of water, thermal expansion powder, composite glue and stabilizer into the mixing barrel, heating and mixing for 20 minutes, the heating temperature in the mixing barrel is 90° C., and forming an overall fabric, dehydrating the overall fabric, air-drying it, and artificially shaping it to form an outer layer fabric 2;

[0078] S6. Take the outer fabric 2 and the inner fabric 1 and use a sewing machine to sew them into a diamond-shaped liner 3, sew them on the diamond-shaped liner 3 through cross stitches to form four groups of diamond-shaped cavities 5, and punch the first down 4 into the four groups of diamond-shaped cavities 5 to finally form a down jacket.

[0079] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A down jacket with a double-layer down-locking structure, characterized in that: It comprises an inner fabric (1) and an outer fabric (2), wherein a rhombus-shaped inner liner (3) is formed between the inner fabric (1) and the outer fabric (2) by heat pressing, and four groups of rhombus-shaped cavities (5) are formed on the rhombus-shaped inner liner (3) by cross stitching, and first down (4) is arranged in each of the four groups of rhombus-shaped cavities (5); The inner fabric (1) and the outer fabric (2) have the same structure. The outer fabric (2) comprises, from the outside to the inside, a surface layer (21), an extension layer (22), a heat-insulating layer (23), a primary down-locking layer (24), and a secondary down-locking layer (25). A second down (6) is provided between the primary down-locking layer (24) and the secondary down-locking layer (25). An arc-shaped groove (26) is formed on a side surface close to the connection side between the primary down-locking layer (24) and the secondary down-locking layer (25). A gripping fiber (27) is provided at the opening of the arc-shaped groove (26). The secondary down locking layer (25) is provided with a ventilation hole (28) at the end of the ventilation hole (28), and the arc-shaped recessed portion is provided inside the arc-shaped recessed portion, and a plurality of groups of split portions (29) are provided inside the arc-shaped recessed portion for the down fibers of the primary down (4) to pass through; In terms of mass percentage: the surface layer (21) comprises 30-45% nylon and 55-70% spandex, and the inner surface of the surface layer (21) is provided with first wrinkles; In terms of mass percentage: the stretch layer (22) is woven from 75-80% polyurethane elastic fibers and 20-25% elastic rubber, and second wrinkles are formed on the surface of the stretch layer (22); In terms of mass percentage, the thermal insulation layer (23) is formed by blending 65-75% wool and 25-35% acrylic fibers, and a third fold is formed on the outer surface of the thermal insulation layer (23).

2. A down jacket with a double-layer down-locking structure according to claim 1, characterized in that: In terms of mass percentage, the primary velvet-locking layer (24) comprises 35-45% of thermal expansion powder, 45-60% of polyester fiber fabric, 2-5% of composite glue and 3-5% of stabilizer, and the secondary velvet-locking layer (25) comprises 30-40% of thermal expansion powder, 55-60% of polyester fiber fabric, 2-5% of composite glue and 3-5% of stabilizer.

3. A down jacket with a double-layer down-locking structure according to claim 2, characterized in that: The thermal expansion powder is made of epoxy resin, and the stabilizer is rubber.

4. The down jacket with a double-layer down-locking structure according to claim 1, characterized in that: A plurality of groups of the grasping fibers (27) are provided at the opening of the arc-shaped groove (26), and the grasping fibers (27) are made of polyester fibers.

5. A method for preparing a down jacket with a double-layer down-locking structure as claimed in any one of claims 1 to 4, characterized in that: The production method includes: S1, weaving nylon and spandex into a surface layer (21) in proportion, and using polyurethane elastic fiber as weft yarn and elastic rubber as warp yarn; sizing the polyurethane elastic fiber, and weaving it at a high density to form an extension layer (22), and then using wool as filament yarn and acrylic fiber as short fiber to interlace and form a thermal insulation layer (23); S2, placing the stretch layer (22) formed above between the surface layer (21) and the thermal insulation layer (23), and stacking them to form a composite fabric, quilting the composite fabric along its surface, and then high-temperature wrinkling the composite fabric to shrink and shape the elastic rubber in the stretch layer (22), and form a second wrinkle on the surface of the stretch layer (22), and form the stretch fabric; S3, taking the above-mentioned stretch fabric, and laying the polyester fiber fabric flat on the inner surface of the stretch fabric, selecting a steel plate with raised points on the surface, heating the steel plate, and hot pressing the steel plate on the polyester fiber fabric, after cooling for 20-30 minutes, forming an arc groove (26), and then picking up the polyester fiber at the opening of the arc groove (26) to form a grasping fiber (27), and after the above-mentioned process processing, forming a layer of lock velvet fabric; S4, taking the above-mentioned layer of lock down fabric and the secondary lock down layer (25), making a plurality of pockets with cavities, and then flushing the second down (6) into the pockets, and continuously applying pressure for 1-1.5 hours, and forming a composite lock down fabric; S5, placing the composite lock fleece fabric in a mixing barrel, adding a certain amount of water, heat expansion powder, composite glue and stabilizer into the mixing barrel, heating and mixing for 20-30 minutes, and forming an overall fabric, dehydrating the overall fabric, air-drying it, and shaping it to form the outer layer fabric (2); S6. Take the outer fabric (2) and the inner fabric (1) mentioned above, make a rhombus-shaped liner (3), and form four groups of rhombus-shaped cavities (5) on the rhombus-shaped liner (3) through cross-sewing, and inject the first down (4) into the four groups of rhombus-shaped cavities (5), and finally form the down jacket.

6. The method for preparing a down jacket with a double-layer down-locking structure according to claim 5, characterized in that: In S3, the heating temperature of the steel plate is in the range of 85-200°C, and the pressing time of the steel plate is in the range of 1-1.5h.

7. The method for preparing a down jacket with a double-layer down-locking structure according to claim 5, characterized in that: In S5, the heating temperature in the stirring barrel ranges from 90 to 100°C.

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