High comfort seat cushion filling and process for its production

Abstract

The application relates to the technical field of household soft cushion production, and discloses a high-comfort cushion filling and a production process thereof, which sequentially comprises a spring support bottom layer, a high-density sponge base layer, a medium-rebound sponge transition layer and a partitioned filling surface layer from the bottom to the top. A velvet silk silk skin layer is sewn on the inner side of the cushion fabric and is coated on the outer side of the partitioned filling surface layer. The spring support bottom layer comprises a plurality of back-arch springs with a wire diameter of 4 mm and an arch height of 6 cm. The high-comfort cushion filling can greatly improve the sitting comfort, the support hardness gradually decreases from the bottom to the top, a continuous and smooth hardness gradient curve is formed, the softness gradually increases, the bottom is strongly supported to avoid collapse, the surface layer is softly wrapped, the human body curve is fitted, and long-time sitting is not easy to cause fatigue.

Description

Technical Field

[0001] This invention relates to the field of home cushion manufacturing technology, and in particular to a high-comfort cushion filling material and its manufacturing process. Background Technology

[0002] With the continuous improvement of home living quality and office health needs, seat cushions, as a core functional component of seating products, have seen their comfort, durability, and health aspects become key indicators for consumers. Currently, most seat cushions on the market use single-layer sponge, pure springs, or loose feather filling structures, which have significant drawbacks. Single-sponge cushions are prone to permanent collapse under long-term pressure, their resilience decays quickly, and their surface softness is insufficient, resulting in poor wrapping comfort. Pure spring cushions provide excessive support, feel too hard, and have poor body conformity, easily causing a feeling of pressure after prolonged sitting. Cushions filled with loose feathers are prone to material displacement, clumping, and localized depressions, providing insufficient support, and the uniformity of filling during the production process is difficult to control. Existing multi-layer composite cushions are mostly simple layers with poor matching of hardness and resilience among layers, unreasonable support gradients, and non-standard bonding and fixing processes between layers, which can easily lead to problems such as delamination and structural deformation.

[0003] In summary, existing seat cushion filling technologies have consistently failed to simultaneously address the five core requirements of strong support, high fit, fatigue resistance, anti-displacement, and low pollution. Problems such as unreasonable support gradient design, poor interlayer structural stability, easy displacement of filling materials, and low standardization of production processes have become key technical bottlenecks restricting the upgrading of high-comfort seat cushion products. Therefore, those skilled in the art have provided a high-comfort seat cushion filling and its production process to solve the problems mentioned in the background art. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies, such as difficulty in balancing support and softness of seat cushion fillings, easy displacement of filling materials, easy failure of interlayer structures, and insufficient seating comfort. This invention provides a high-comfort seat cushion filling and its manufacturing process, which achieves a seating effect of strong support at the bottom layer, a smooth transition in the middle layer, and a soft and conforming surface layer through a multi-layer gradient composite structure. At the same time, standardized processes ensure product consistency and structural stability.

[0005] To achieve the above objectives, the present invention provides a high-comfort seat cushion filling and its manufacturing process, comprising, from bottom to top, a spring support bottom layer, a high-density sponge base layer, a medium-resilience sponge transition layer, and a partitioned filling surface layer. A skin-friendly fleece layer is sewn onto the inner side of the seat cushion fabric and covers the outer side of the partitioned filling surface layer. The spring support bottom layer includes multiple rear arch springs with a wire diameter of 4mm and an arch height of 6cm. The springs are arranged horizontally at 8cm intervals. Two paper-wrapped positioning steel wires with a diameter of 3mm are threaded through the middle of each spring, and each end of the spring is bent by 6cm. A 5cm wide latex elastic band is provided on each of the longitudinal sides of the spring layer, and a 5cm wide cross elastic band is provided on each of the sides of the seat. The top surface of the spring layer is covered with a protective mesh cloth. The high-density sponge base layer is a 9cm thick powder-free polyurethane sponge with a density of 35kg / m³. 3 Indentation hardness 110N, springback rate 55%; The intermediate-resilience sponge transition layer is a 2cm thick, high-resilience, powder-free polyurethane sponge with a density of 25kg / m³. 3 Indentation hardness 45N, springback rate 58%; The partitioned filling layer consists of several independently sealed feather bags arranged in a matrix. The internal dimensions of each feather bag are 40cm×40cm×6cm, and each bag is filled with 100g of mixed filling material. The mixed filling material is composed of 70% 15D down fibers and 30% 4-6cm white goose feathers by mass. A 6cm wide edge of feather fabric is reserved around the feather bag and is bonded and fixed to the underlying sponge. The skin-friendly velvet layer has a weight of 120g / m². 2 Needle-punched velvet is sewn onto the inside of the seat cushion fabric.

[0006] Furthermore, the rear arch spring is made of carbon spring steel wire; the protective mesh fabric is a polyester fiber filament mesh fabric.

[0007] Furthermore, the latex elastic band has a composite woven structure of natural latex and polyester fiber.

[0008] Furthermore, the high-density sponge base layer and the spring support bottom layer, the medium-resilience sponge transition layer and the high-density sponge base layer, and the partitioned filling surface layer and the medium-resilience sponge transition layer are all bonded together with solvent-based environmentally friendly polyurethane adhesive.

[0009] Furthermore, the high-density sponge base layer has vertically arranged ventilation holes in a matrix.

[0010] A manufacturing process for a high-comfort seat cushion filling material, the manufacturing process specifically including the following steps: Step 1: Preparation of the spring support bottom layer; After cold bending and forming the arched spring, arrange and thread the positioning steel wire, tension and install the elastic band, cover and fix with mesh cloth to obtain the semi-finished spring bottom layer; Step 2: Sponge layer cutting and pre-composite; cut two specifications of powder-free sponge separately, apply glue precisely, and then stack and press them together to obtain a double-layer sponge composite layer; Step 3: Preparation of the partitioned filling surface; cut and sew the one-piece feather bag, mix and prepare the filling material, fill with down in a measured amount, seal and shape to obtain the partitioned filling surface; Step 4: Preparation of the partitioned filling surface; cut and sew the one-piece feather bag, mix and prepare the filling material, fill with down in a measured amount, seal and shape to obtain the partitioned filling surface; Step 5: Fabric lamination and finished product shaping; sew the fleece velvet inside the fabric, insert the filling core, seal and finish, and obtain the finished product after inspection.

[0011] Furthermore, step 1 specifically includes: Step 101: Cold bend 4mm carbon steel wire into a rear arch spring with an arch height of 6cm, bend each end by 6cm, and temper and shape it after holding at 300℃ for 20 minutes. Step 102: Arrange the springs in parallel with an 8cm center-to-center spacing, thread two 3mm paper-wrapped positioning steel wires through them and fix them in series, adjust the spacing to be even, and then fasten the end buckle. Step 103: Fix 5cm wide latex elastic bands on both sides of the spring frame in the longitudinal direction, and install 5cm wide latex elastic bands on both sides of the seat body in a cross arrangement, with the elastic bands maintaining a 15% pre-stretch rate; Step 104: Lay the tensioned protective mesh fabric flat on the top surface of the spring frame and fix it with nails around the perimeter, with a nail spacing of 10cm.

[0012] Furthermore, in step 2, an automatic glue spraying machine is used to control the glue application rate to 0.1 g / ㎡, and after lamination, the layers are pressed together at room temperature under a pressure of 0.02 MPa for 3-5 minutes.

[0013] Furthermore, in step 3, a fully automatic quantitative down filling machine is used to fill each cell quantitatively, with a filling deviation of ≤±2g. The filling material is weighed at a mass ratio of 7:3 and then fed into a vertical mixer to be stirred for 6 minutes to achieve a fluffiness of ≥600FP after mixing. The stitch length of the feather bag is 8 stitches / cm, and down-proof stitching is used.

[0014] The present invention has the following beneficial effects: 1. The present invention proposes a high-comfort seat cushion filling material and its manufacturing process. Its structure can greatly improve the comfort of sitting. The support hardness gradually decreases from bottom to top, forming a continuous and smooth hardness gradient curve. The softness gradually increases, which not only ensures strong bottom support to prevent collapse, but also achieves soft wrapping on the surface, conforming to the curve of the human body, and making it less tiring to sit for a long time.

[0015] 2. This invention proposes a high-comfort seat cushion filling material and its production process, which features zoned filling, stable structure, and optimized material ratio. It uses individually compartmented feather bags for quantitative filling, completely solving the problems of loose feather displacement and clumping. The feather fabric edges are reserved around the perimeter and bonded to the underlying sponge, resulting in a sturdy overall structure that does not deform over long-term use. Furthermore, the surface layer uses a mixture of down and white goose feathers in a 7:3 ratio, balancing the fluffiness and softness of the down with the resilience and support of the goose feathers, providing a delicate touch and long-lasting elasticity. The sponge layer uses a powder-free and environmentally friendly material that is healthy and odorless.

[0016] 3. The present invention proposes a high-comfort seat cushion filling material and its production process, which has a high degree of standardization, with clear and quantified parameters for each process. The spring spacing, adhesive application amount, and filling amount are all precisely controlled, resulting in good product consistency. The interlayer bonding process is standardized, with moderate bonding strength that does not damage the performance of the sponge and fabric, and a high finished product qualification rate. The production process quantifies and standardizes all key process parameters, from the arch height and spacing of the spring molding to the adhesive application amount, pressing pressure, and pressing time of the sponge composite, and the filling amount of each cell in the down filling, all with clear numerical standards, eliminating the reliance on workers' operational experience. Attached Figure Description

[0017] Figure 1 This is a flowchart illustrating the production process of a high-comfort seat cushion filling material proposed in this invention. Detailed Implementation

[0018] The technical solutions of the specific embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: This invention provides a specific embodiment: a high-comfort seat cushion filling material, which has an overall rectangular block structure. From bottom to top, it consists of a spring support bottom layer, a high-density sponge base layer, a medium-resilience sponge transition layer, and a partitioned filling surface layer. The inner side of the seat cushion fabric is sewn with a skin-friendly fleece layer, which completely covers the outer side of the partitioned filling surface layer. The layers are fixedly connected by an environmentally friendly adhesive layer to form an integrated gradient support structure. The detailed technical features of each layer structure are as follows: Spring supports the bottom layer; The spring support layer is the core load-bearing layer of the entire seat cushion, providing basic rigid support and high resilience. It consists of four parts: a rear arch spring array, paper-wrapped positioning steel wire, latex elastic band, and protective mesh fabric. The rear arch springs are made of high-quality No. 70 carbon spring steel wire with a wire diameter of 4mm. They are cold-bent into an upward arched structure with a forming arch height of 6cm. Both ends of the spring are bent inward by 6cm to form a horizontal fixed section. The rear arch springs undergo low-temperature tempering treatment at 280-320℃ to eliminate internal stress and improve fatigue life. Multiple rear arch springs are arranged parallel and equidistantly along the transverse direction of the seat cushion, with a center-to-center distance of 8cm between adjacent springs. Depending on the width of the seat cushion, 8-15 springs can be installed. The paper-wrapped positioning steel wire has a diameter of 3mm and is covered with an insulating paper layer. Two wires are set and run parallel to each other along the longitudinal direction of the seat cushion in the middle of all the rear arch springs, connecting all the rear arch springs into an integral frame, restricting the lateral displacement of the springs and improving the overall structural stability. The latex elastic band is made of natural latex and polyester fiber composite weaving, with a width of 5cm, a tensile elongation of ≥200%, and a resilience of ≥90%. Two of them are fixed along the longitudinal direction to the front and rear sides of the spring frame, and the other two are arranged diagonally to the left and right sides of the spring frame, forming an all-round elastic tension structure, improving the edge support performance and anti-tilt capability of the seat cushion. The protective mesh fabric is woven from polyester fiber filaments with a weight of 80g / ㎡ and a mesh size of 10×10. It is laid flat to cover the top surface of the rear arch spring array, and the mesh fabric is bound and fixed to the edges of the spring frame. The mesh fabric serves two purposes: firstly, it acts as an insulator to prevent the upper sponge from directly contacting the metal spring and being worn or punctured; secondly, it disperses the local stress of the spring, allowing the supporting force to be transmitted upward more evenly, while also providing a certain degree of buffering and noise reduction.

[0020] High-density sponge base layer; A high-density sponge base layer is laid on top of the mesh fabric of the spring support base layer, serving as a secondary load-bearing layer to further disperse the supporting force and cushion the hard feel of the spring. This high-density sponge base layer is a monolithically molded, powder-free polyurethane sponge, prepared using an MDI environmentally friendly foaming system. No talc, calcium carbonate, or other powder fillers are added during the production process to avoid dust release during use. The sponge is 9cm thick and has a bulk density of 35kg / m³. 3 The indentation hardness is 110N, the resilience rate is 55%, and the compression set is ≤3%. The bottom surface of the high-density sponge base layer is bonded and fixed to the underlying mesh cloth and spring frame through the first adhesive layer, and the top surface is bonded to the medium-resilience sponge transition layer through the second adhesive layer.

[0021] Medium-resilience sponge transition layer; A medium-resilience sponge transition layer is laminated onto the top surface of the high-density sponge base layer. This layer serves as a gradient transition between the hard support and the soft surface, ensuring a smooth transition in hardness and preventing abrupt changes in texture. It also further enhances pressure dispersion. This medium-resilience sponge transition layer is made of high-resilience powder-free polyurethane sponge, also using a powder-free, environmentally friendly formula, with a thickness of 2cm and a bulk density of 25kg / m³. 3 It has an indentation hardness of 45N and a rebound rate of 58%, exhibiting superior slow rebound characteristics and fit. By setting this 2cm thick transition layer, the seat cushion support hardness gradually transitions from 110N at the bottom to a soft state at the surface, forming a continuous hardness gradient curve. When the human body sits down, the touch is soft, and the support gradually increases during the sinking process. There is neither a feeling of touching the bottom nor a feeling of floating, and the sitting experience is significantly improved.

[0022] Fill the surface with partitions; The partitioned filling layer is laid on top of the medium-resilience sponge transition layer and serves as the direct contact layer of the seat cushion, providing a soft, enveloping feel and a snug fit. It consists of several independently sealed feather bags arranged in a matrix. The feather bags are made of high-density down-proof polyester fabric with a down-proof coating, making them breathable and leak-proof. The internal dimensions of a single feather bag are 40cm × 40cm × 6cm. Depending on the overall size of the seat cushion, N × M independent bags can be set up in an equidistant matrix arrangement. Each feather bag is filled with 100g of mixed filler, which, by weight percentage, consists of 70% 15D three-dimensional hollow crimped siliconized down fibers and 30% 4-6cm washed white goose feathers. The 15D down fibers have a three-dimensional hollow crimped structure and a siliconized surface, resulting in high loft, good resilience, and resistance to clumping, primarily providing a soft and fluffy feel. The 4-6cm white goose feathers are high-quality goose feathers that have undergone washing, degreasing, disinfection, and drying. Their soft and elastic shafts provide structural support and lasting resilience, preventing the down fibers from losing loft under prolonged pressure. The two are mixed in a 7:3 ratio, balancing ultimate softness with structural stability, resulting in a delicate feel and long-lasting support. Each feather bag has a 6cm wide edge of feather fabric around its perimeter. Adjacent feather bags are connected as a whole by the feather fabric edge, which is then fully bonded to the underlying medium-resilience sponge transition layer through a third adhesive layer. This ensures that the entire section of filling surface is firmly bonded to the underlying sponge layer, preventing overall displacement. Each feather bag is a fully sealed structure, and the opening is sewn sealed after filling to ensure that the internal filling material will not move or shift within the bag, fundamentally solving the problems of displacement and clumping in bulk filling.

[0023] Fleece-like, skin-friendly layer; The soft, skin-friendly fleece layer is sewn and fixed to the inner surface of the cushion fabric, covering the outer layer of the partitioned filling along with the overall fabric. This enhances the softness and fullness of the fabric, preventing friction and noise from direct contact between the fabric and the feather pouch. It also provides further cushioning and a more comfortable feel when sitting down. The fleece layer is a needle-punched non-woven fabric with a weight of 120g / m². 2 Made of polyester fiber, it is lightweight, soft, breathable and warm. It is evenly sewn onto the inside of the fabric using a flat stitching process, without any protrusions or wrinkles.

[0024] Example 2: like Figure 1 As shown, this embodiment provides a manufacturing process for a high-comfort seat cushion filling, including the following steps: Step 1: Preparation of the spring support base layer; Cold bending of springs: 4mm carbon spring steel wire is fed into a fully automatic spring forming machine and bent into a rear arch spring with an arch height of 6cm according to preset parameters. Both ends are bent straight for 6cm. After forming, the spring is sent to a tempering furnace for low-temperature tempering to eliminate the internal stress of forming. After natural cooling, it is ready for use. Spring arrangement and wire threading: Arrange the tempered rear arch springs in parallel on the tooling fixture with a center spacing of 8cm, keeping the arch height direction consistent; thread two 3mm paper-wrapped positioning steel wires into the positioning holes in the middle of all springs in sequence along the longitudinal direction, and after adjusting the spring spacing to be uniform, fasten the wire ends to form a spring frame. Elastic band tensioning installation: A 5cm wide latex elastic band is nailed to the front and rear sides of the spring frame, and the elastic band maintains a constant pre-tension rate; a 5cm wide latex elastic band is installed on the left and right sides of the spring frame, respectively, to form lateral elastic support. Mesh fabric covering and fixing: Cut polyester mesh fabric to the same size, lay it flat to cover the top surface of the spring frame, stretch it flat, and fix it to the edge of the spring frame with staples around the perimeter to ensure that the mesh fabric is taut and not loose, thus obtaining the semi-finished bottom layer of the spring support.

[0025] Step 2: Cutting and pre-compositing the sponge layer; Sponge cutting: A fully automatic sponge cutting machine is used to cut high-density sponge blocks and high-resilience sponge blocks into sheets of the corresponding sizes; after cutting, the edge burrs are removed to ensure that the dimensional deviation is within the allowable range; Precise glue application: An automatic glue spraying machine is used to evenly spray solvent-based environmentally friendly polyurethane glue onto the top surface of the high-density sponge sheet. The flow rate is controlled to ensure that the amount of glue applied is accurate to 0.1g / ㎡, and the spraying is uniform with no missed spots or glue accumulation. Overlapping and pressing: Align the medium-resilience sponge transition layer and place it on the adhesive surface of the high-density sponge, ensuring that the four sides are aligned and there is no misalignment; then put it into a cold press and press it at room temperature under constant pressure for 3-5 minutes to allow the adhesive to fully cure and bond, resulting in a double-layer sponge composite layer; after pressing, take it out and let it stand to release internal stress.

[0026] Step 3: Partition filling surface preparation; Feather fabric cutting and sewing: Cut high-density downproof polyester fabric, cut and sew it according to the design size to make a matrix of connected feather bags. Each bag has an internal space of the corresponding size, and a 6cm wide feather fabric edge is reserved on all four sides. A down filling opening is reserved at one end of the bag. Downproof thread is used for sewing, and the stitch density is controlled to prevent down leakage. Filler material mixing: Weigh 15D three-dimensional hollow crimped siliconized velvet and 4-6cm washed white goose feathers at a mass ratio of 7:3, and put them into a vertical mixer to mix them thoroughly and evenly. Quantitative filling: A fully automatic quantitative filling machine is used, with the filling amount per cell set to 100g. Mixed filling material is then added to each feather bag sequentially. During the filling process, the filling air pressure is controlled to ensure uniform filling and prevent local clumping or deflation. Sealing and shaping: After all the down filling is completed, check that the filling amount deviation of each cell is within the acceptable range, and then use an industrial sewing machine to sew and seal all the down filling openings; tidy up the shape of the feather bag to make the fullness of each cell uniform, and obtain the partitioned filling surface layer.

[0027] Step 4: Multi-layer integral assembly; Bonding the bottom layer to the sponge layer: Apply environmentally friendly adhesive evenly to the mesh fabric surface of the spring support bottom layer using a glue sprayer, with an application rate of 0.1g / ㎡; place the high-density sponge side of the sponge composite layer downwards on the spring bottom layer, and gently press the surface to ensure full contact; then send it into a cold press to press and ensure a firm bond. Bonding the surface layer to the sponge layer: Apply environmentally friendly adhesive evenly to the top surface of the medium-resilience sponge transition layer at a rate of 0.1 g / m²; Lay the feather fabric edge of the partitioned filling surface layer flat and aligned with the sponge surface so that the feather fabric edge is fully in contact with the sponge surface; Roll the surface with a pressure roller to remove air bubbles, and let it stand at room temperature to allow the adhesive to cure; Check that there are no curling edges or delamination, and you will get the filling core. Step 5: Fabric lamination and finished product shaping; Fleece stitching: Cut 120g / ㎡ fleece according to the unfolded size of the cushion fabric, and use a flat stitching process to evenly sew the fleece onto the inner side of the fabric to ensure that the fleece is flat, wrinkle-free, and does not shift. Fitting and finishing: Fit the assembled filling core into the sewn fabric cover, and tidy up the four corners and four edges to ensure that the fabric and filling fit together fully without bulges or skewing. Sealing inspection: Sew up the opening of the fabric, clean the surface threads and dust; conduct appearance and size inspection, and if qualified, it is the finished seat cushion filling.

[0028] The following points should be noted in this article: 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0029] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing specific embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-comfort seat cushion filling, comprising, from bottom to top, a spring-supported bottom layer, a high-density sponge base layer, a medium-resilience sponge transition layer, and a partitioned filling surface layer, wherein a skin-friendly fleece layer is sewn onto the inner side of the seat cushion fabric and covers the outer side of the partitioned filling surface layer, characterized in that: The spring support bottom layer includes multiple rear arch springs with a wire diameter of 4mm and an arch height of 6cm. The springs are arranged horizontally at 8cm intervals. Two paper-wrapped positioning steel wires with a diameter of 3mm are inserted in the middle of each spring. The ends of the springs are bent by 6cm. A 5cm wide latex elastic band is provided on each side of the spring layer in the longitudinal direction. A 5cm wide cross elastic band is provided on each side of the seat. The top surface of the spring layer is covered with a protective mesh cloth. The high-density sponge base layer is a 9cm thick powder-free polyurethane sponge with a density of 35kg / m³. 3 Indentation hardness 110N, springback rate 55%; The intermediate-resilience sponge transition layer is a 2cm thick, high-resilience, powder-free polyurethane sponge with a density of 25kg / m³. 3 Indentation hardness 45N, springback rate 58%; The partitioned filling layer consists of several independently sealed feather bags arranged in a matrix. The internal dimensions of each feather bag are 40cm×40cm×6cm, and each bag is filled with 100g of mixed filling material. The mixed filling material is composed of 70% 15D down fibers and 30% 4-6cm white goose feathers by mass. A 6cm wide edge of feather fabric is reserved around the feather bag and is bonded and fixed to the underlying sponge. The skin-friendly velvet layer has a weight of 120g / m². 2 Needle-punched velvet is sewn onto the inside of the seat cushion fabric.

2. The high-comfort seat cushion filling material according to claim 1, characterized in that: The rear arch spring is made of carbon spring steel wire; the protective mesh is made of polyester fiber filament mesh.

3. The high-comfort seat cushion filling material according to claim 1, characterized in that: The latex elastic band has a composite woven structure of natural latex and polyester fiber.

4. The high-comfort seat cushion filling material according to claim 1, characterized in that: The high-density sponge base layer and the spring support bottom layer, the medium-resilience sponge transition layer and the high-density sponge base layer, and the partitioned filling surface layer and the medium-resilience sponge transition layer are all bonded together with solvent-based environmentally friendly polyurethane adhesive.

5. The high-comfort seat cushion filling material according to claim 1, characterized in that: The high-density sponge base layer has vertically arranged ventilation holes in a matrix.

6. A manufacturing process for a high-comfort seat cushion filling as described in any one of claims 1-5, characterized in that: The production process specifically includes the following steps: Step 1: Preparation of the spring support bottom layer; After cold bending and forming the arched spring, arrange and thread the positioning steel wire, tension and install the elastic band, cover and fix with mesh cloth to obtain the semi-finished spring bottom layer; Step 2: Sponge layer cutting and pre-composite; cut two specifications of powder-free sponge separately, apply glue precisely, and then stack and press them together to obtain a double-layer sponge composite layer; Step 3: Preparation of the partitioned filling surface; cut and sew the one-piece feather bag, mix and prepare the filling material, fill with down in a measured amount, seal and shape to obtain the partitioned filling surface; Step 4: Preparation of the partitioned filling surface; cut and sew the one-piece feather bag, mix and prepare the filling material, fill with down in a measured amount, seal and shape to obtain the partitioned filling surface; Step 5: Fabric lamination and finished product shaping; sew the fleece velvet inside the fabric, insert the filling core, seal and finish, and obtain the finished product after inspection.

7. The manufacturing process of a high-comfort seat cushion filling material according to claim 6, characterized in that: Step 1 specifically includes: Step 101: Cold bend 4mm carbon steel wire into a rear arch spring with an arch height of 6cm, bend each end by 6cm, and temper and shape it after holding at 300℃ for 20 minutes. Step 102: Arrange the springs in parallel with an 8cm center-to-center spacing, thread two 3mm paper-wrapped positioning steel wires through them and fix them in series, adjust the spacing to be even, and then fasten the end buckle. Step 103: Fix 5cm wide latex elastic bands on both sides of the spring frame in the longitudinal direction, and install 5cm wide latex elastic bands on both sides of the seat body in a cross arrangement, with the elastic bands maintaining a 15% pre-stretch rate; Step 104: Lay the tensioned protective mesh fabric flat on the top surface of the spring frame and fix it with nails around the perimeter, with a nail spacing of 10cm.

8. The manufacturing process of a high-comfort seat cushion filling material according to claim 6, characterized in that: In step 2, an automatic glue spraying machine is used to control the glue application rate to 0.1 g / ㎡. After lamination, the layers are pressed together at room temperature under a pressure of 0.02 MPa for 3-5 minutes.

9. The manufacturing process of a high-comfort seat cushion filling material according to claim 6, characterized in that: In step 3, a fully automatic quantitative down filling machine is used to fill each cell quantitatively, with a filling deviation of ≤±2g. The filling material is weighed at a mass ratio of 7:3 and then fed into a vertical mixer for 6 minutes to make the fluffiness ≥600FP after mixing. The stitch length of the feather bag is 8 stitches / cm, and down-proof stitching is used.

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