Production process of down-proof down jacket

Abstract

The application discloses a production process of a down-proof down jacket, and relates to the technical field of down jacket production, which comprises the following process steps in sequence: step 1: fabric pretreatment, nylon fabric with a warp density and weft density of no less than 1200 roots / 10 cm is selected as a surface layer and an inner layer; step 2: preparation of warm-keeping flake, an anti-static fiber blended surface layer, a hollow temperature-locking elastic core layer and a high-density dense protective bottom layer are prepared in sequence; step 3: part cutting and pretreatment, each fabric is cut according to a design size to obtain each part of the down jacket; step 4: preparation of a strip-shaped adhesive area and compounding of the surface layer and the inner layer; step 5: filling and forming; and step 6: sewing of a separation seam and splicing of parts; the application adopts a hot-melt adhesive strip-shaped adhesive area to form an interlaced limiting grid through hot pressing compounding, reduces sewing needle holes and prevents down from leaking; the down-filling cavity is divided into small cavities that are interconnected, down movement is limited and air permeability is retained; and the down-proof and wind-proof performance is strengthened in cooperation with a multi-layer composite flake and a customized fabric weaving process.

Description

Technical Field

[0001] This invention relates to the field of down jacket production and processing technology, and more specifically to a down jacket production process that prevents down leakage. Background Technology

[0002] Down jackets, as the mainstream winter clothing, rely primarily on the loft and sealing of the down filling for their warmth. Down leakage is a core pain point limiting the quality of down jackets. Most traditional down jackets use nylon fabric with a one-piece, full-compartment down filling structure, using stitching to separate the filling compartments. During manufacturing, this stitching leaves numerous needle holes, allowing the soft down to easily leak out. Furthermore, traditional manufacturing processes lack an effective structure to hold the filling layer in place, causing the down to clump and shift within the compartments. Repeated washing and bending during daily activities further enlarge the needle holes at the seams, exacerbating the down leakage problem. Summary of the Invention

[0003] The purpose of this invention is to provide a manufacturing process for down jackets that prevent down leakage, in order to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0005] A manufacturing process for down jackets that prevent down leakage includes the following steps performed sequentially:

[0006] Step 1: Fabric pretreatment. Select high-density nylon fabric with a warp and weft density of no less than 1200 threads / 10cm as the outer and inner layers. Select thermal insulation wadding, elastic fabric, mercerized velvet fabric, and polyester lining as functional fabrics. Wash, dehydrate, shape, and treat all fabrics in sequence.

[0007] Step 2: Preparation of thermal insulation wadding. The antistatic fiber blended surface layer, the hollow heat-locking elastic core layer, and the high-density dense protective bottom layer are prepared in sequence. The three layers are then bonded together using a hot-melt point bonding process from the outside to the inside.

[0008] Step 3: Component cutting and pre-treatment. Cut each fabric according to the design size to obtain each component of the down jacket. Mark the filling area and the position of the dividing seam. Perform overlocking on all components.

[0009] Step 4: Preparation of strip adhesive areas and lamination with the surface layer and inner layer. Mark the strip adhesive areas with tilted layers and opposite directions of adjacent layers in the down filling area of ​​the surface layer. After applying hot melt adhesive, hot press it with the inner layer fabric to form an interlaced limiting grid.

[0010] Step 5: Filling and shaping: Fill each wadding filling area with insulating wadding and each down filling area with down. After filling, tidy up and replenish the filling.

[0011] Step 6: Sewing the dividing seams and splicing the parts. Sew the dividing seams, splice the elastic fabric area, mercerized velvet insulation layer, and hand pockets, and then splice the whole thing together. Cover the splice with hot melt adhesive strips and heat-press to seal the needle holes.

[0012] In step 1, the fabric is washed at a water temperature of 30-35℃ for 15-20 minutes; the dehydration and setting process is carried out at a low speed of 500-600 r / min for 5-8 minutes, and the setting temperature is 100-110℃ for 8-10 minutes; the antistatic treatment is carried out by spraying an antistatic agent at a dosage of 10-15 g / m², and then air-drying naturally after spraying.

[0013] In step 2, the antistatic fiber blended surface layer is woven from a mixture of polyester fiber and long-lasting conductive staple fiber at a mass ratio of 95:5, with a warp density of 300-320 threads / 10cm and a weft density of 280-300 threads / 10cm; the hollow heat-locking elastic core layer is formed by three-dimensional crimped hollow polyester staple fiber web-punching, with a web thickness of 8-10mm and a needle-punching density of 200-220 needles / cm²; the high-density dense protective bottom layer is made of 0.8-1.0dtex ultrafine polyester fiber needle-punched, with a needle-punching density of 250-280 needles / cm²; the three-layer composite hot-pressing temperature is 120-130℃, the pressure is 0.3-0.5MPa, the time is 30-50s, and the bonding point spacing is 1.5-2.0cm.

[0014] In step 3, the overlock stitch has a stitch length of 12-14 stitches / 3cm and a width of 0.5-0.8cm; the cutting size of the cooling layer matches the back of the hand area after the hand is inserted; and the cutting size of the elastic fabric area matches the splicing areas on both sides and inside the sleeves of the down jacket.

[0015] In step 4, firstly, multiple layers of inclined and staggered strip adhesive positions are laid in the down filling area, and then the surface layer and inner layer are aligned and laminated together by hot pressing. Through the staggered strip adhesive structure, the original large overall cavity of the down is divided into several interconnected independent small cavities, which restricts the large-scale sliding and movement of the down, while not blocking the air circulation between the cavities.

[0016] When the surface layer and inner layer are hot-pressed together, a molding mold with matching strip adhesive direction is used to align and press the entire structure. The hot melt adhesive is constrained by the pre-set strip cavity of the mold, so that the width, length and arrangement of each strip adhesive area after molding are kept uniform.

[0017] In step 4, the spacing between strip adhesive areas is 3-4 cm, and the width of a single strip is 0.8-1.0 cm; the hot melt adhesive is a low-temperature polyurethane hot melt adhesive with a coating thickness of 0.1-0.15 mm; the hot pressing temperature is 100-120℃, the pressure is 90-150 N, and the speed is 0.04-0.10 m / s, and the hot pressing is followed by natural cooling to room temperature.

[0018] In step 5, the filling density of the thermal insulation wadding is 200-220g / m², and the down is selected with a fill power ≥700FP and a filling density of 250-280g / m². The filling opening is sealed with sealant and sewn tightly with a stitch spacing of 11-13 stitches / 3cm.

[0019] The dividing seams have a stitch spacing of 11-13 stitches / 3cm, and the thread is high-strength nylon thread with a diameter of 0.2-0.3mm; the elastic fabric area is spliced ​​using double-needle close stitching with a stitch spacing of 12-14 stitches / 3cm; the mercerized velvet insulation layer uses blind stitching with a stitch spacing of 13-15 stitches / 3cm; the overall splicing is double-needle close stitching with a stitch spacing of 11-13 stitches / 3cm, and the hot pressing temperature at the splicing point is 110-120℃, the pressure is 120-150N, and the speed is 0.04-0.07m / s.

[0020] The outer layer, inner layer fabric, antistatic fiber blended surface layer, elastic fabric area, and high-density protective bottom layer are each made using corresponding comb-pile padding yarn weaving processes.

[0021] The outer and inner layers of fabric are woven with double comb bars. The padding yarn number of the front comb bar is 1-0 / 1-2 / / , and the padding yarn number of the back comb bar is 2-3 / 1-0 / / . The padding yarn density is controlled at 28-32 threads / 10cm.

[0022] The antistatic fiber blended surface layer is woven with double comb bars. The padding yarn number of the front comb bar is 1-2 / 2-1 / / , and the padding yarn number of the back comb bar is 0-1 / 1-0 / / . The padding yarn tension is controlled at 30-35cN.

[0023] The high-density, dense protective base layer is woven with three combs. The front comb padding yarn number is 1-0 / 0-1 / / , the middle comb padding yarn number is 2-3 / 3-2 / / , and the rear comb padding yarn number is 1-2 / 2-1 / / .

[0024] The elastic fabric area is woven with double comb bars. The padding yarn number of the front comb bar is 1-0 / 2-3 / / , and the padding yarn number of the back comb bar is 3-2 / 0-1 / / . The tension of the spandex padding yarn is controlled at 25-30cN.

[0025] The beneficial effects of this invention are as follows:

[0026] This invention uses hot melt adhesive strips to form an interlaced limiting grid, reducing sewing needle holes and preventing down leakage; it divides the filling cavity into interconnected small cavities, restricting down movement while maintaining breathability; and it combines multi-layer composite wadding with customized fabric weaving technology to enhance down-blocking and windproof performance. Attached Figure Description

[0027] Figure 1 This is the front view of the present invention;

[0028] Figure 2 This is a rear view of the present invention;

[0029] Figure 3 This is a structural diagram of the down jacket itself;

[0030] Figure 4 This is a schematic diagram of the structure of a hand pocket;

[0031] Figure 5 This is a schematic diagram of a partial structure;

[0032] Figure 6 This is a schematic diagram of the structure of the thermal insulation wadding.

[0033] Reference numerals: 1. Down jacket body; 2. Outer layer; 3. Filling layer; 4. Inner layer; 5. Collar wadding filling area; 6. First dividing seam; 7. Front wadding filling area; 8. Front down filling area; 9. Sleeve down filling area; 10. Second dividing seam; 11. Back down filling area; 12. Back wadding filling area; 13. Third dividing seam; 14. Strip adhesive area; 15. Antistatic fiber blended outer layer; 16. Hollow heat-locking elastic core layer; 17. High-density dense protective bottom layer; 18. Hand pockets; 19. Inner fabric layer; 20. Cooling layer; 21. Invisible zipper; 22. Elastic fabric area; 23. Mercerized fleece insulation layer. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0036] Example 1

[0037] like Figures 1 to 6 As shown, this embodiment provides a manufacturing process for down jackets that prevent down leakage, comprising the following sequential process steps:

[0038] Step 1: Fabric pretreatment. Select high-density nylon fabric with a warp and weft density of no less than 1200 threads / 10cm as the outer layer 2 and inner layer 4. Select thermal insulation wadding material, elastic fabric, mercerized velvet fabric, and polyester lining as functional fabrics. Wash, dehydrate and shape, and treat all fabrics in sequence.

[0039] Step 2: Preparation of thermal insulation wadding. The antistatic fiber blended surface layer 15, the hollow heat-locking elastic core layer 16, and the high-density dense protective bottom layer 17 are prepared in sequence. The three layers are then bonded together using a hot-melt point bonding process from the outside to the inside.

[0040] Step 3: Component cutting and pre-treatment. Cut each fabric according to the design size to obtain each component of the down jacket. Mark the filling area and the position of the dividing seam. Perform overlocking on all components.

[0041] Step 4: Preparation of strip adhesive area 14 and its composite with surface layer 2 and inner layer 4. In the down filling area of ​​surface layer 2, strip adhesive areas 14 with layered tilt and adjacent layers in opposite directions are marked. After applying hot melt adhesive, they are hot-pressed with the fabric of inner layer 4 to form an interlaced limiting grid.

[0042] Step 5: Filling and shaping: Fill each wadding filling area with insulating wadding and each down filling area with down. After filling, tidy up and replenish the filling.

[0043] Step 6: Sewing the dividing seams and splicing the components. Sew the dividing seams, splice the elastic fabric area 22, the mercerized velvet insulation layer 23, and the hand pocket 18, and then splice the whole thing together. Cover the splice with hot melt adhesive strips and heat-press to seal the needle holes.

[0044] In step 1, the fabric is washed at a water temperature of 30-35℃ for 15-20 minutes; the dehydration and setting process is carried out at a low speed of 500-600 r / min for 5-8 minutes, and the setting temperature is 100-110℃ for 8-10 minutes; the antistatic treatment is carried out by spraying an antistatic agent at a dosage of 10-15 g / m², and then air-drying naturally after spraying.

[0045] In step 2, the antistatic fiber blended surface layer 15 is woven from a mixture of polyester fiber and long-lasting conductive staple fiber at a mass ratio of 95:5, with a warp density of 300-320 threads / 10cm and a weft density of 280-300 threads / 10cm; the hollow heat-locking elastic core layer 16 is formed by three-dimensional needle punching of hollow three-dimensional crimped polyester staple fiber, with a web thickness of 8-10mm and a needle punching density of 200-220 needles / cm²; the high-density dense protective bottom layer 17 is made of 0.8-1.0dtex ultrafine polyester fiber needle punching, with a needle punching density of 250-280 needles / cm²; the three-layer composite hot pressing temperature is 120-130℃, the pressure is 0.3-0.5MPa, the time is 30-50s, and the bonding point spacing is 1.5-2.0cm.

[0046] In step 3, the overlock stitch has a stitch length of 12-14 stitches / 3cm and a width of 0.5-0.8cm; the cutting size of the cooling layer 20 matches the back of the hand area after the hand is inserted; and the cutting size of the elastic fabric area 22 matches the splicing areas on both sides and the inside of the sleeves of the down jacket body 1.

[0047] In step 4, firstly, multiple layers of inclined and staggered strip adhesive positions are laid in the down filling area, and then the surface layer 2 and the inner layer 4 are aligned and laminated and hot-pressed together. Through the staggered strip adhesive structure, the original large cavity of the down is divided into several interconnected independent small cavities, which restricts the large-scale sliding and movement of the down, while not blocking the air circulation between the cavities.

[0048] When the surface layer 2 and the inner layer 4 are hot-pressed together, a molding mold with matching strip adhesive direction is used to align and press the entire structure. The hot melt adhesive is constrained by the pre-set strip cavity of the molding mold, so that the width, length and arrangement of each strip adhesive area 14 after molding are kept uniform.

[0049] In step 4, the spacing between strip adhesive areas 14 is 3-4 cm, and the width of a single strip is 0.8-1.0 cm; the hot melt adhesive is a low-temperature polyurethane hot melt adhesive with a coating thickness of 0.1-0.15 mm; the hot pressing temperature is 100-120℃, the pressure is 90-150 N, and the speed is 0.04-0.10 m / s, and the hot pressing is followed by natural cooling to room temperature.

[0050] In step 5, the filling density of the thermal insulation wadding is 200-220g / m², and the down is selected with a fill power ≥700FP and a filling density of 250-280g / m². The filling opening is sealed with sealant and sewn tightly with a stitch spacing of 11-13 stitches / 3cm.

[0051] The dividing seam has a stitch spacing of 11-13 stitches / 3cm, and the thread is high-strength nylon thread with a diameter of 0.2-0.3mm; the elastic fabric area 22 is spliced ​​using double-needle close stitching with a stitch spacing of 12-14 stitches / 3cm; the mercerized velvet insulation layer 23 uses blind stitching with a stitch spacing of 13-15 stitches / 3cm; the overall splicing is double-needle close stitching with a stitch spacing of 11-13 stitches / 3cm, and the hot pressing temperature at the splicing point is 110-120℃, the pressure is 120-150N, and the speed is 0.04-0.07m / s.

[0052] The outer layer 2, inner layer 4 fabric, antistatic fiber blended surface layer 15, elastic fabric area 22, and high-density protective bottom layer 17 are respectively made using corresponding comb-pile pad yarn weaving processes.

[0053] The outer layer 2 and inner layer 4 fabrics are woven with double comb bars. The padding yarn number of the front comb bar is 1-0 / 1-2 / / , and the padding yarn number of the back comb bar is 2-3 / 1-0 / / . The padding yarn density is controlled at 28-32 threads / 10cm.

[0054] The antistatic fiber blended surface layer 15 is woven with double comb bars. The front comb bar padding yarn number is 1-2 / 2-1 / / , and the rear comb bar padding yarn number is 0-1 / 1-0 / / . The padding yarn tension is controlled at 30-35 cN.

[0055] The high-density, dense protective base layer 17 is woven with three combs. The front comb padding yarn number is 1-0 / 0-1 / / , the middle comb padding yarn number is 2-3 / 3-2 / / , and the rear comb padding yarn number is 1-2 / 2-1 / / .

[0056] The elastic fabric section 22 is woven with double comb bars. The front comb bar padding yarn number is 1-0 / 2-3 / / , and the rear comb bar padding yarn number is 3-2 / 0-1 / / . The tension of the spandex padding yarn is controlled at 25-30cN.

[0057] A down jacket that prevents down leakage includes a down jacket body 1, which comprises, from the outside to the inside, a surface layer 2, a filling layer 3 and an inner layer 4.

[0058] The collar of the filling layer 3 is provided with a collar wadding filling area 5;

[0059] The front side of the down jacket body 1 is provided with a first dividing seam 6, which divides the front side of the filling layer 3 into a front wadding filling area 7 and a front down filling area 8.

[0060] The sleeve of the filling layer 3 is provided with a down filling area 9;

[0061] The back of the down jacket is provided with a second dividing seam 10 to divide the back of the filling layer 3 into a back down filling area 11 and a back wadding filling area 12;

[0062] A third dividing seam 13 is provided between the front wadding filling area 7 and the rear down filling area 11 of the down jacket body 1;

[0063] The collar wadding filling area 5, the front wadding filling area 7, and the rear wadding filling area 12 are used to fill with thermal insulation wadding.

[0064] The front down filling area 8, the sleeve down filling area 9, and the rear down filling area 11 are used for filling with down;

[0065] Strip adhesive areas 14 are provided on the front down filling area 8, the sleeve down filling area 9, and the back down filling area 11. These strip adhesive areas 14 separate and fix the down, preventing it from clumping, shifting, or leaking. The seams between the front and back sides, collar, and sleeves of the down jacket body 1 are all sewn together to ensure the overall structural strength of the garment, reduce seam gaps, and lower the risk of down leakage. The strip adhesive areas 14 are formed by hot-melt adhesive coating and hot-pressing, bonding the outer layer 2 and inner layer 4 at corresponding positions to separate and fix the down, preventing it from clumping, shifting, or leaking. Both the outer layer 2 and the inner layer 4 are made of nylon.

[0066] The strip adhesive areas 14 are arranged in layers from top to bottom, with each layer of strip adhesive areas 14 being inclined. The inclination directions of adjacent layers of strip adhesive areas 14 are opposite, with one layer inclined to the lower left and the other to the lower right. Through the structure of multiple layers of staggered and oppositely inclined strip adhesive areas 14, an interlaced limiting grid is formed, which can bind the down at multiple points, preventing the down from gathering locally, moving up and down, and piling up irregularly. At the same time, the staggered and oblique arrangement can disperse the tensile stress of the fabric, making it less prone to cracking and delamination during wear and activity, further improving the effect of preventing down leakage and displacement, while taking into account both structural stability and wearing softness.

[0067] The insulating wadding adopts a three-layer composite integrated structure, which includes an antistatic fiber blended surface layer 15, a hollow heat-locking elastic core layer 16, and a high-density dense protective bottom layer 17 from the outside to the inside. The antistatic fiber blended surface layer 15, the hollow heat-locking elastic core layer 16, and the high-density dense protective bottom layer 17 are connected by an integral hot-melt point-like adhesive. The antistatic fiber blended outer layer 15 is made of polyester matrix blended with long-lasting conductive short fibers, which can discharge static electricity in real time and prevent static electricity from attracting down and sticking to the seams; the hollow heat-locking elastic core layer 16 is hollow three-dimensional crimped polyester short fiber three-dimensional web needle punching, with strong resilience and toughness, not easy to collapse under pressure, and seals in still air inside, providing long-lasting heat lock and cold protection, while being lightweight and not heavy on the body; the high-density dense protective bottom layer 17 is a high-count, high-density ultra-fine polyester needle punched dense layer, with tightly arranged fibers and small and uniform pores, which has excellent windproof and cold insulation performance, effectively preventing external cold wind from penetrating into the interior of the garment; the three-layer structure is molded in one piece, which is not easy to clump, not easy to delaminate, and is water-resistant and anti-aging, which not only stably releases antistatic performance, but also improves the zoned warmth retention effect.

[0068] The down jacket body 1 has two symmetrical hand pockets 18 on the front side. The hand pockets 18 are made of inner layer 4 fabric and cooling layer 20. The opening of the hand pockets 18 is sewn to the down jacket body 1. The cooling layer 20 corresponds to the back of the hand after the hand is inserted to solve the problem of the hand coming into contact with the cold fabric.

[0069] The cooling layer 20 is made of polyester mercerized velvet fabric;

[0070] The inner lining is made of polyester fabric.

[0071] The hand pocket 18 has a concealed zipper 21 at its opening.

[0072] Elastic fabric areas 22 are sewn together on both sides of the down jacket body 1 and on the inner side of the sleeves. The elastic fabric areas 22 are woven from a blend of polyester and spandex. Outdoors, the arms are frequently in motion, and the inner side of the sleeves and the sides of the down jacket body 1 are in frequent contact. The elastic fabric areas 22 have good elasticity relative to the down jacket body 1, making it easy for the contact areas to move.

[0073] The down jacket body 1 has a mercerized fleece insulation layer 23 sewn onto the inside of the collar. The mercerized fleece fabric is soft and skin-friendly, fits the neck comfortably without causing discomfort, and provides a close and snug fit, reducing the entry of cold air and improving the warmth and fit around the neck.

Claims

1. A manufacturing process for down jackets that prevent down leakage, characterized in that, It includes the following process steps performed sequentially: Step 1: Fabric pretreatment. Select high-density nylon fabric with a warp and weft density of no less than 1200 threads / 10cm as the outer and inner layers. Select thermal insulation wadding, elastic fabric, mercerized velvet fabric, and polyester lining as functional fabrics. Wash, dehydrate, shape, and treat all fabrics in sequence. Step 2: Preparation of thermal insulation wadding. The antistatic fiber blended surface layer, the hollow heat-locking elastic core layer, and the high-density dense protective bottom layer are prepared in sequence. The three layers are then bonded together using a hot-melt point bonding process from the outside to the inside. Step 3: Component cutting and pre-treatment. Cut each fabric according to the design size to obtain each component of the down jacket. Mark the filling area and the position of the dividing seam. Perform overlocking on all components. Step 4: Preparation of strip adhesive areas and lamination with the surface layer and inner layer. Mark the strip adhesive areas with tilted layers and opposite directions of adjacent layers in the down filling area of ​​the surface layer. After applying hot melt adhesive, hot press it with the inner layer fabric to form an interlaced limiting grid. Step 5: Filling and shaping: Fill each wadding filling area with insulating wadding and each down filling area with down. After filling, tidy up and replenish the filling. Step 6: Sewing the dividing seams and splicing the parts. Sew the dividing seams, splice the elastic fabric area, mercerized velvet insulation layer, and hand pockets, and then splice the whole thing together. Cover the splice with hot melt adhesive strips and heat-press to seal the needle holes.

2. The manufacturing process for down-proof jackets according to claim 1, characterized in that, In step 1, the fabric is washed at a water temperature of 30-35℃ for 15-20 minutes; the dehydration and setting process is carried out at a low speed of 500-600 r / min for 5-8 minutes, and the setting temperature is 100-110℃ for 8-10 minutes; the antistatic treatment is carried out by spraying an antistatic agent at a dosage of 10-15 g / m², and then air-drying naturally after spraying.

3. The manufacturing process for down-proof jackets according to claim 1, characterized in that, In step 2, the antistatic fiber blended surface layer is woven from a mixture of polyester fiber and long-lasting conductive staple fiber at a mass ratio of 95:5, with a warp density of 300-320 threads / 10cm and a weft density of 280-300 threads / 10cm; the hollow heat-locking elastic core layer is formed by three-dimensional crimped hollow polyester staple fiber web-punching, with a web thickness of 8-10mm and a needle-punching density of 200-220 needles / cm²; the high-density dense protective bottom layer is made of 0.8-1.0dtex ultrafine polyester fiber needle-punched, with a needle-punching density of 250-280 needles / cm²; the three-layer composite hot-pressing temperature is 120-130℃, the pressure is 0.3-0.5MPa, the time is 30-50s, and the bonding point spacing is 1.5-2.0cm.

4. The manufacturing process for down-proof jackets according to claim 1, characterized in that, In step 3, the overlock stitch has a stitch length of 12-14 stitches / 3cm and a width of 0.5-0.8cm; the cutting size of the cooling layer matches the back of the hand area after the hand is inserted; and the cutting size of the elastic fabric area matches the splicing areas on both sides and inside the sleeves of the down jacket.

5. The manufacturing process for down-proof jackets according to claim 1, characterized in that, In step 4, firstly, multiple layers of inclined and staggered strip adhesive positions are laid in the down filling area, and then the surface layer and inner layer are aligned and laminated together by hot pressing. Through the staggered strip adhesive structure, the original large overall cavity of the down is divided into several interconnected independent small cavities, which restricts the large-scale sliding and movement of the down, while not blocking the air circulation between the cavities.

6. The manufacturing process for down-proof down jackets according to claim 5, characterized in that, When the surface layer and inner layer are hot-pressed together, a molding mold with matching strip adhesive direction is used to align and press the entire structure. The hot melt adhesive is constrained by the pre-set strip cavity of the mold, so that the width, length and arrangement of each strip adhesive area after molding are kept uniform.

7. The manufacturing process for down-proof jackets according to claim 1, characterized in that, In step 4, the spacing between strip adhesive areas is 3-4 cm, and the width of a single strip is 0.8-1.0 cm; the hot melt adhesive is a low-temperature polyurethane hot melt adhesive with a coating thickness of 0.1-0.15 mm; the hot pressing temperature is 100-120℃, the pressure is 90-150 N, and the speed is 0.04-0.10 m / s, and the hot pressing is followed by natural cooling to room temperature.

8. The manufacturing process for down-proof jackets according to claim 1, characterized in that, In step 5, the filling density of the thermal insulation wadding is 200-220g / m², and the down is selected with a fill power ≥700FP and a filling density of 250-280g / m². The filling opening is sealed with sealant and sewn tightly with a stitch spacing of 11-13 stitches / 3cm.

9. The manufacturing process for down-proof jackets according to claim 1, characterized in that, The dividing seams have a stitch spacing of 11-13 stitches / 3cm, and the thread is high-strength nylon thread with a diameter of 0.2-0.3mm; the elastic fabric area is spliced ​​using double-needle close stitching with a stitch spacing of 12-14 stitches / 3cm; the mercerized velvet insulation layer uses blind stitching with a stitch spacing of 13-15 stitches / 3cm; the overall splicing is double-needle close stitching with a stitch spacing of 11-13 stitches / 3cm, and the hot pressing temperature at the splicing point is 110-120℃, the pressure is 120-150N, and the speed is 0.04-0.07m / s.

10. The manufacturing process for down-proof jackets according to claim 1, characterized in that, The outer layer, inner layer fabric, antistatic fiber blended surface layer, elastic fabric area, and high-density protective bottom layer are each made using corresponding comb-pile padding yarn weaving processes. The outer and inner layers of fabric are woven with double comb bars. The padding yarn number of the front comb bar is 1-0 / 1-2 / / , and the padding yarn number of the back comb bar is 2-3 / 1-0 / / . The padding yarn density is controlled at 28-32 threads / 10cm. The antistatic fiber blended surface layer is woven with double comb bars. The padding yarn number of the front comb bar is 1-2 / 2-1 / / , and the padding yarn number of the back comb bar is 0-1 / 1-0 / / . The padding yarn tension is controlled at 30-35cN. The high-density, dense protective base layer is woven with three combs. The front comb padding yarn number is 1-0 / 0-1 / / , the middle comb padding yarn number is 2-3 / 3-2 / / , and the rear comb padding yarn number is 1-2 / 2-1 / / . The elastic fabric area is woven with double comb bars. The padding yarn number of the front comb bar is 1-0 / 2-3 / / , and the padding yarn number of the back comb bar is 3-2 / 0-1 / / . The tension of the spandex padding yarn is controlled at 25-30cN.

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