A seat leather lower high-elasticity shape-retaining composite fabric

Abstract

This invention discloses a high-elasticity shape-retaining composite fabric for use under leather seats, relating to the technical field of soft and reinforcing shape-retaining lining fabrics for automotive seat leather. The fabric is woven with two-needle plain binding (connecting the warp and weft yarns) using GB1:21 / 01 or 10 / 12, and two paired comb sections using GB2:000 / 000 / 111 / 000 and GB3:111 / 000 / 000 / 000. Both the warp and weft yarns are alternately combined using fine denier high-elasticity polyester DTY (low F number) and conventional coarse denier low-elasticity high F number polyester yarns. This invention overcomes the shortcomings of existing technologies, effectively improving the high elasticity, fluffiness, and softness of the fabric, and further enhancing its dimensional shape recovery and stability. It also increases the leather's strength and prevents bulging and wrinkling after lamination with leather.

Description

Technical Field

[0001] This invention relates to the field of processing technology for soft, reinforced, and shape-retaining lining fabrics under automotive seat leather, and particularly to a high-elasticity, shape-retaining composite fabric for use under seat leather. Background Technology

[0002] Seats are crucial safety and comfort components inside a car, and generally the most valuable single item among automotive interior parts. Passenger car seats primarily consist of a cover, foam padding, frame, structural components, drive components, and electric and pneumatic systems. The cover refers to the fabric and its composite layers on top of the foam padding on the seat frame. It is the visible and tactile surface of the seat, and its softness, texture, and perceived comfort and functionality are important indicators of the quality of the car's interior.

[0003] The outer fabric is the most important and upscale part of the seat cover. It is divided into three grades according to value and grade: genuine leather (such as Napa leather) and microfiber leather (such as Alcantara suede) are high-end fabrics, which have a good feel when sitting and are close to human skin or animal fur; the next grade is imitation leather (such as PU, PVC leather) or microfiber fabrics such as suede and peach skin that have been finished to obtain imitation leather (such as PU, PVC leather) or brushed and napped products, which are characterized by imitating natural fur and are mid-range fabrics; ordinary woven fabrics are low-end fabrics. Although they were once very popular, they are now used less and less in the seats of domestic cars priced above 100,000 yuan.

[0004] Genuine leather used in car seats is made from animal epidermal cells and collagen fibers through tanning. Cowhide, especially the top-grain leather of young bulls, is considered the best due to its density, durability, natural texture, and pleasant feel. However, the quality varies between different parts of the leather, and it exhibits anisotropy (different stress and strain). Microfiber leather is made by needle-punching and reinforcing multiple layers of microfiber nonwoven fabric (usually island-island fiber nonwoven fabric), followed by weight reduction (fiber opening), drying, impregnation with PU emulsion at high temperature, and then finishing processes such as dyeing, shaping, and brushing. Because the fibers in the nonwoven fabric are mostly oriented along their length, it also exhibits significant anisotropy in mechanical properties (generally higher warp strength and lower elastic elongation). With the increasing prevalence of heating, ventilation, massage, and multi-directional adjustment functions in high-end cars, perforated leather is more common in luxury seats. Perforation disrupts the cohesion between some fibers, inevitably reducing the leather's stress resistance and resilience, leading to a deterioration in feel and bulging after prolonged repeated use.

[0005] To address the aforementioned issues, most manufacturers now opt to place a 3D fabric layer between the leather cover and the internal foam layer of the seat, and then sew the leather cover to the 3D fabric layer and the foam layer together. Theoretically, this can solve the problem of deteriorated leather feel. However, in actual use, after the leather fabric has been subjected to several periods of high stress (sitting pressure), the total accumulated residual elongation deformation is inconsistent with the subsequent 3D fabric (or perforated foam layer), causing excess leather and 3D fabric to separate, bubble, and bulge.

[0006] To further address the aforementioned issues, a layer of reinforcing fabric is bonded to the underside of the leather surface using hot melt adhesive before being sewn to a 3D fabric or sponge layer. This improves the feel of the leather surface to some extent, but since the primary function of the reinforcing fabric is to strengthen the leather, bonding it will actually make the leather stiffer. Therefore, the improvement in feel is still limited compared to the leather itself. Furthermore, even if the reinforcing fabric is a regular polyester DTY woven elastic interlining, it will worsen the stiffness of the leather. Even if a stiff, inelastic woven interlining helps the leather bear stress, with a service life of over ten years and countless repeated fatigue stresses, the accumulated plastic deformation after the leather and reinforcing fabric are combined will quickly cause the composite size to grow out. This excess plastic deformation has nowhere to go but bulges and bubbles. Therefore, even with this improved structural solution, the anti-bulging effect and the improvement in feel are limited, necessitating the search for other structures and methods. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a high-elasticity, shape-retaining composite fabric for seat leather, which can effectively improve the fabric's high elasticity, fluffiness, and softness, and further enhance its dimensional shape recovery and stability. It can maintain the leather's properties after being laminated with leather, preventing bulging and wrinkling.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A high-elasticity, shape-retaining composite fabric for seat leather underlayment, wherein the high-elasticity, shape-retaining composite fabric under seat leather underlayment is obtained by processing a biaxial warp-knitted fabric with warp and weft interlining. The biaxial warp-knitted fabric with warp and weft interlining includes GB1 being a 12 / 10 or 21 / 01 two-needle plain binding yarn to connect the warp and weft interlining yarns, and the warp interlining consists of two guide bars, GB2 and GB3; GB1 is woven from fine denier polyester DTY; the weave pattern used in the GB2 guide bar is the warp interlining yarn. The pattern disc is 000 / 000 / 111 / 000, and GB2 is woven with high-elasticity, low-F-count fine fiber material; the pattern disc used in the GB3 comb bar is the warp-inserted pattern disc 111 / 000 / 000 / 000, and GB3 is woven with conventional polyester coarse denier, low-elasticity, high-F-count fiber material; the weft yarns of the warp-inserted, weft-inserted biaxial warp-knitted structure are high-elasticity, low-F-count fine fiber material and conventional polyester coarse denier, low-elasticity, high-F-count fiber material, with the two types of weft yarns arranged alternately.

[0010] Preferably, the high-elasticity, low-F-count fine fiber material includes any one or more of PBT, PTT, PBT+PET blended T800, and PTT+PET blended T400, and the yarn fineness is from 50D / 24F to 100D / 48F.

[0011] Preferably, the conventional polyester coarse denier low elastic high F-number fiber material includes conventional polyester PET DTY 75-300D / 144-576f.

[0012] Preferably, the processing of the biaxial warp-knitted fabric includes the following steps:

[0013] (1) Fabric pre-shrinking;

[0014] (2) After pre-shrinking the greige fabric, it is washed or dyed by overflow.

[0015] (3) After washing or dyeing, the greige fabric is opened and dehydrated;

[0016] (4) Fabric shaping treatment.

[0017] Preferably, in step (1), the pre-shrinking of the fabric is performed by using a steaming machine.

[0018] Preferably, in step (4), water-repellent silicone oil 15-20g / l + antistatic agent 0.8g / l + glacial acetic acid 0.5g / l is used as a setting agent and the setting is carried out at a temperature of 175-180℃ and a speed of 45-50m / min.

[0019] Preferably, the high-elasticity shape-retaining composite fabric and the seat leather are bonded together by applying hot melt adhesive to the weft yarn surface of the high-elasticity shape-retaining composite fabric, sprinkling Co-PA powder, blowing and sucking the powder, and then heating and curing the coating points in an oven. Finally, the high-elasticity shape-retaining composite fabric and the car seat leather or microfiber leather are heat-pressed together.

[0020] Compared with the prior art, the present invention provides a high-elasticity shape-retaining composite fabric under seat leather, which has the following beneficial effects:

[0021] 1. This invention uses GB1:21 / 01 or 10 / 12 two-needle warp flat binding (connecting the warp and weft yarns), GB2:000 / 000 / 111 / 000, and GB3:111 / 000 / 000 / 000. The two paired guide bars change from the conventional 000 number track to 111 number on the 1 / 4 stitch. The result is a reduction in the binding yarn's constraint on the warp yarns, allowing for changes in weave structure such as... Figure 1 As shown, its two needle positions are not bound by coils, which increases the freedom of expansion and contraction, making the product fluffier, softer and more elastic.

[0022] 2. In this invention, both the warp and weft yarns are made of fine denier high-elastic polyester DTY with a low F count and conventional polyester coarse denier low-elasticity yarn with a high F count, used alternately (the warp yarns are GB2 / GB3, each using different varieties, creating a fabric texture effect with alternating layers). This is further enhanced by fine denier polyester DTY warp plain weave binding yarns, which strengthens the high elasticity, fluffiness, softness, high dimensional recovery, and high stability of the base fabric in the above-mentioned special warp and weft knitted products.

[0023] 3. The design of the lining fabric for composite leather seats needs to consider its high elasticity and high recovery properties to ensure that the leather can return to its original shape after being deformed under stress after lamination. However, if the elastic coefficient K value of the high-elasticity lining fabric is too high, even with good elasticity, it will excessively change the feel of the leather. If the leather's supple and elastic feel becomes stiffer, it will also reduce the leather's premium feel. Therefore, the lining fabric needs to have both good elasticity and good loft and soft, full characteristics. It is difficult to achieve both simultaneously with just one type of DTY material. Therefore, the present invention uses a mixture of ultra-high elasticity low-F-count fine yarn and coarse denier ultra-fine high-F-count low-elasticity polyester yarn, which is a good solution. Combining this coarse and fine yarn mixture, and the high elasticity low-F-count and fine denier high-F-count mixture, through subsequent shrinkage, expansion, dyeing, and shaping processes, grooves and other textured structures can be formed on both sides of the lining fabric. This helps maintain the breathability of the perforated leather surface after lamination, thus maintaining the air-absorbing, breathable, and cooling function inside the seat in summer.

[0024] 4. In this invention, GB2 is a special high-elastic DTY material with a low F number fine yarn, and GB3 is a common low-elasticity coarse yarn with a very high F number. The weft yarn is also a combination of two different materials with different styles and properties, so that the performance characteristics of the warp and weft are similar. The binding yarn is changed from traditional polyester FDY to fine denier polyester DTY, which can better enhance the elasticity of the knitted structure in all directions and the ability of the structure to recover its appearance after the removal of external force. In this way, the base fabric after appropriate pre-shrinking, swelling, dyeing and finishing has both a very good fluffy and soft hand feel and a good elastic recovery ability (high elastic deformation ability, but not very high elastic coefficient, so the composite will not change the original performance grade of the leather too much). The combination of warp and weft yarns with large differences in thickness and F number will form raised grooves on the appearance of the base fabric. The coarse yarn with a high F number will form soft bulges on both sides of the fabric, and the fine denier high-elastic yarn with a low F number will lie low between the coarse yarns to form more breathable channels.

[0025] 5. The present invention can effectively bond the high-elasticity shape-retaining composite fabric with the leather layer by applying hot melt adhesive to the weft yarn on one side, which is beneficial to maintaining the feel of the composite. On the other side of the high-elasticity shape-retaining composite fabric, hard dots are set, which can form a soft and embedded state with the micropores on the surface of the support layer when the seat cover is installed, forming a certain mechanical interlocking force to prevent the leather layer from peeling and bubbling off from the support layer, achieving the purpose of light bonding without significantly affecting the feel and stress of the leather layer. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the high-elasticity shape-retaining composite fabric of the present invention;

[0027] Figure 2 A schematic diagram of the structure of traditional warp-knitted fabrics with interlocking warp and weft threads;

[0028] Figure 3 This is a photograph of the thin and light product W5T70-0402D hot melt adhesive double-dot coated weft yarn surface prepared in Example 1 of the present invention. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0031] Example 1:

[0032] The manufacturing process for the slim and lightweight W5T70-0402D product is as follows:

[0033] (1) Fabric weaving method and process:

[0034] Karl Mayer 24-needle three-comb full-width warp knitting machine RS or HKS model 162-inch double width.

[0035] GB1: Flower Plate 211 / 011 Full Wear PES DTY Low Elasticity 30D / 24F

[0036] GB2: Flower Pattern 000 / 000 / 111 / 000 Full Wear PBT DTY High Elasticity 55D / 24F

[0037] GB3: Flower Plate 111 / 000 / 000 / 000 Full Penetration PES DTY Low Elasticity 75D / 288F

[0038] Weft yarns: PBT DTY high elastic 55D / 24F and PES DTY low elastic 75D / 288F, the two weft yarns are arranged alternately, with a weft density of 14.5 threads / cm on the machine;

[0039] (2) Process flow of pretreatment and dyeing and finishing of greige fabric:

[0040] ①ST steaming machine pre-shrinking process:

[0041] Vehicle speed 20m / min, steam inlet pressure 0.4-0.5kg / cm² 2 The heat transfer oil temperature is set to 230℃, and the temperature range inside the steam chamber is 125-130℃; the pre-shrinkage ratio 1 is -16%, the pre-shrinkage ratio 2 is -5%, and the fabric width is 150±5cm. (The purpose of pre-shrinking is to release the residual internal stress within or between the DTY yarn molecules under tensionless or low-tension conditions in the steam, causing the originally straight fibers to shrink and bend longitudinally. This shrinkage and expansion of the yarn leads to the shrinkage of the fabric width and longitudinal direction, forming fabric elasticity. At the same time, it increases the yarn density of the fabric surface, prevents snagging and abrasion during operation in the overflow tank, and ensures that the yarn shrinks in place and the fabric surface has good final elasticity.)

[0042] ② Overflow washing: After raising the water temperature to 80℃ in the overflow tank, put the steamed and pre-shrunken white fabric into the tank, add 1.5g / l of degreasing agent and 1g / l of sodium carbonate in the tank and dissolve and dilute with soft water. After the addition is completed, raise the temperature to 120℃ at a rate of 1.5-2℃ / min, then keep it at that temperature for 30 minutes, and then lower the temperature to 70℃ at a rate of 1.5℃ / min to drain the water. Then add warm water (reuse clean hot water) and neutralize and wash for 15 minutes at 50℃ with 0.8g / l of glacial acetic acid. After draining the water, add cold water and wash for 10 minutes without draining the fabric. The residual clean water in the tank can be used for the next overflow washing. (The purpose of this white overflow wash is to further release the residual internal stress during the stretching and elastication of the yarn fibers through full heat shrinkage in high-temperature hot water, so that the yarn can shrink and swell more fully, transforming the potential elasticity of the yarn into full elasticity and soft hand feel of the fabric. At the same time, it washes away surfactants and dirt such as oils on the fabric surface, stabilizes the effect of water-repellent agents and softeners during the setting process, and makes the subsequent coating effect more stable.)

[0043] ③ The washed fabric in the overflow tank undergoes a dewatering process after being opened up;

[0044] ④ After the fabric has been opened and dehydrated, it needs to be set. The setting formula is: 15-20g / l of water-repellent silicone oil + 0.8g / l of antistatic agent + 0.5g / l of glacial acetic acid; setting temperature: 175-180℃, machine speed: 45-50m / min. (The purpose of setting is to dry the fabric surface. At high temperatures, the polymers in the polyester fiber base fabric recrystallize to release internal stress, and the molecules rearrange themselves. Then, cooling and crystallization fix the fiber morphology and dimensional stability of the base fabric. Simultaneously, the addition of water-repellent agents and softeners in the setting machine's grinding groove lays the foundation for the performance and soft, stable feel of the coated product.)

[0045] Key parameters of the base fabric after setting: dyeing and finishing yield 72.5%, machine width 152cm, warp and weft density: 12.8 x 20 threads / cm, base fabric weight per square meter: 70 ± 0.5 g / m² 2 ; Water repellency 70-80.

[0046] (3) Coated composite microfiber leather:

[0047] ① First, coat the reverse side (lining side) to form the hard dots required for interlocking: Select a conventional double-dot primer polyacrylate primer with a solids content of 22-28%. Then, use a CP19 circular screen with a pore size of 0.45mm and a wall thickness of 0.17-0.2mm to apply thermosetting polyacrylate hard dots using a dot coating process. After coating, heat, dry, cure, and cool to form hard dots with a diameter of 0.35-0.45mm and a coating weight of 3-4g / m². 2 Then flip it over and apply dotted hot melt adhesive to the second side using a double-dot coating machine;

[0048] ② Apply hot melt adhesive to the weft yarn side using a rotary screen (CP40). The base slurry is a polyacrylate emulsion, grade 760. Apply Co-PA powder (containing at least 50% low-temperature Co-PA powder, the remainder being medium-temperature copolyamide hot melt adhesive powder). After blowing and suction, the coating is heated and cured in an oven, then cooled and wound up. The total coating weight is 10-12 g / m². 2 The ratio of solid to powder base paste is 7:3. After applying the adhesive, the finished product is as follows: Figure 3 As shown;

[0049] ③ Composite microfiber leather:

[0050] After coating, the finished width is 150-152cm, and the total weight per square meter is 84-87g / m². 2 The thickness is 0.36-0.38mm; after three tensile tests in both the warp and weft directions, the residual deformation rate after removing external force is less than 1.5% after the tensile rate is 10%. This is similar to the microfiber leather used in car seats at 120℃ for 15 seconds at 1.5kg / cm². 2 Pressed under pressure and cooled, the peel strength was measured to be >10N / 5CM. The composite sample had a soft and textured feel.

[0051] Example 2:

[0052] The specific manufacturing process for the medium-thickness product W5T96-0402D is as follows:

[0053] (1) Fabric weaving method and process:

[0054] Karl Mayer 24-needle three-comb full-width warp knitting machine RS or HKS model 162-inch double width.

[0055] GB1: Flower Plate 211 / 011 Full Wear PES DTY Low Elasticity 30D / 24F

[0056] GB2: Flower Pattern 000 / 000 / 111 / 000 Full Wear T400 DTY High Elastic 75D / 36F

[0057] GB3: Flower Plate 111 / 000 / 000 / 000 Full Wear PES DTY Low Elasticity 150D / 288F

[0058] Weft yarns: T400 DTY high elastic 75D / 36F and PES DTY low elastic 150D / 288F, arranged alternately. Weft density on the loom: 13.3 weft threads / cm.

[0059] (2) Process flow of pretreatment and dyeing and finishing of greige fabric (the specific process is the same as in Example 1 above); Key parameters of the base fabric after setting: dyeing and finishing yield 73.5%, width after finishing 152cm, warp and weft density: 12.8x18 threads / cm, base fabric weight per square meter: 96±2g / m 2 ; Water repellency 70-80.

[0060] (3) Coated composite microfiber leather:

[0061] Steps ① and ② are the same as in Example 1;

[0062] ③ The finished width after coating is 150-152cm, and the total weight per square meter is 110-114g / m². 2 The thickness is approximately 0.44-0.46mm. After three tensile tests in both the warp and weft directions, with an elongation rate of 10%, the residual deformation rate after removing external force is below 1.2%. It is comparable to automotive seat microfiber leather tested at 120℃ for 15 seconds at 1.5kg / cm². 2 Pressed under pressure and cooled, the peel strength was measured to be >10N / 5CM. The composite sample had a soft and textured feel.

[0063] Example 3:

[0064] The manufacturing process for the heavier-duty product W5T11-0402D is as follows:

[0065] (1) Fabric weaving method and process: Karl Mayer 24 needle three comb full width weft-inserted warp knitting machine RS or HKS model 162 inches double width.

[0066] GB1: Flower Plate 211 / 011 Full Wear PES DTY Low Elasticity 50D / 48F

[0067] GB2: Flower Pattern 000 / 000 / 111 / 000 Full Wear T400 DTY High Elastic 75D / 36F

[0068] GB3: Flower Plate 111 / 000 / 000 / 000 Full Wear PES DTY Low Elasticity 150D / 288F

[0069] Weft yarns: T400 DTY high elastic 75D / 36F and PES DTY low elastic 150D / 288F, the two weft yarns are arranged alternately, with a weft density of 13 threads / cm on the machine.

[0070] (2) The pretreatment and dyeing and finishing process of the greige fabric is the same as that in Example 1 above: Key parameters of the base fabric after setting: dyeing and finishing yield 72%, machine width 152cm, warp and weft density: 12.8x18 threads / cm, base fabric weight per square meter: 115±3g / m 2 ; Water repellency 70-80.

[0071] (3) Coated composite microfiber leather:

[0072] Steps ① and ② are the same as in Example 1;

[0073] ③ After coating, the finished product width is 150-152cm, the total weight per square meter is 130-135g / m2, and the thickness is approximately 0.50-0.53. After three tensile tests in both the warp and weft directions, with an elongation rate of 10%, the residual deformation rate after removing external force is below 1.5%; similar to that of a car seat (200g / m2). 2 At 120℃, for 15 seconds, 1.5 kg / cm² 2 Pressed under pressure and cooled, the peel strength was measured to be >10N / 5CM. The composite sample had a soft and textured feel.

[0074] Example 4:

[0075] The specific manufacturing process for the heavy-duty W5T16-0402D is as follows:

[0076] (1) Fabric weaving method and process: Karl Mayer 24 needle three comb full width weft-inserted warp knitting machine RS or HKS model 162 inches double width.

[0077] GB1: Flower Plate 211 / 011 Full Wear PES DTY Low Elasticity 50D / 48F

[0078] GB2: Flower Pattern 000 / 000 / 111 / 000 Full Wear T400 DTY High Elastic 75D / 36F

[0079] GB3: Flower Plate 111 / 000 / 000 / 000 Full Wear PES DTY Low Elasticity 300D / 576F

[0080] Weft yarns: T400 DTY high elastic 75D / 36F and PES DTY low elastic 300D / 576F, the two weft yarns are arranged alternately; the weft density on the loom is 12.5 threads / cm.

[0081] (2) The pretreatment and dyeing and finishing process of the greige fabric is the same as that in Example 1 above: Key parameters of the base fabric after setting: dyeing and finishing yield 73.5%, machine width 152cm, warp and weft density: 12.8x17 threads / cm, base fabric weight per square meter: 160±3g / m 2 ; Water repellency 70-80.

[0082] (3) Coated composite microfiber leather:

[0083] Steps ① and ② are the same as in Example 1;

[0084] ③ The finished product width after coating is 150-152cm, the total weight per square meter is 175-180g / m2, and the thickness is approximately 0.55-0.60mm. After three tensile tests in both the warp and weft directions, with an elongation rate of 10%, the residual deformation rate after removing external force is below 1.2%. This is comparable to genuine leather or microfiber leather for car seats at 120°C for 15 seconds at 1.5kg / cm². 2 Pressed under pressure and cooled, the peel strength was measured to be >10N / 5CM. The composite sample had a soft and textured feel.

[0085] Detection:

[0086] 1. Comparison of fabric structure:

[0087] The fabric structure of the high-elasticity shape-retaining composite fabric under the seat leather of the present invention ( Figure 1 ) and traditional warp-weft knitted fabric structure ( Figure 2 For comparison:

[0088] Traditional warp-knitted fabrics with interlocking warp and weft yarns consist of a single-strand biaxial warp knitting structure: GB1: 12 / 10 or 21 / 01 two-needle plain warp yarns, one or two comb-type interlocking warp yarns: GB2: 00 / 00, GB3: 0 / 00, and then full-width weft interlocking between the loops and extension lines of each plain warp structure. However, if this structure is used for the composite lining under the aforementioned seat leather, it will hinder the full expansion of the interlocking warp yarns' DTY fibers because the interlocking warp yarns will be pressed down by the extension lines of each plain warp structure, which is not conducive to the shrinkage and expansion of the interlocking warp yarns, resulting in a relatively flat fabric.

[0089] The high-elasticity shape-retaining composite fabric under the seat leather of this invention changes the two warp yarn patterns GB2 / GB3 with different elastic shrinkage rates from the commonly used 00 / 00 to GB2: 000 / 000 / 111 / 000 and GB3: 111 / 000 / 000 / 000. Each of them is not bound by binding yarn in the relative position of the two weft yarns, which means that they can shrink and expand more freely and fully in this free position with less obstruction.

[0090] 2. Composite microfiber leather

[0091] Two types of interlining fabrics were selected, characterized by good stress resistance, good elastic recovery, and stable structure, resulting in a fluffy and soft interlining: biaxial warp-knitted interlinings W5110-04D and W7T64-05D, serving as the control group. The products obtained in Examples 1 and 3 were used as the experimental group for performance comparison. The composite microfiber leather used was 200g / m², 0.55mm thick, with an original hand feel softness level of 3, warp / weft tensile strength of approximately 6N / 4N at 6% elongation, residual deformation of approximately 1.6% and 1.8%, and air permeability level of 5 after perforation. The products of the control and experimental groups were composited with microfiber leather according to the method described in Example 1, and then the products were tested. The specific test results are shown in the table below.

[0092]

[0093] Among them: the feel is rated from hard to soft, from 1 to 6; the air resistance is rated from opaque to non-resistant, from 0 to 10.

[0094] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A seat leather under high elastic shape-retention composite fabric, characterized by: The high-elasticity and shape-retaining composite fabric under the seat leather is obtained by processing a biaxial warp-knitted fabric with warp and weft weft. The biaxial warp-knitted fabric with warp and weft weft weft includes setting GB1 as 12 / 10 or 21 / 01 two-needle plain binding yarn to connect the warp and weft yarns. The warp weft consists of two guide bars, GB2 and GB3. GB1 is woven from fine denier polyester DTY; The GB2 comb uses a weave pattern disc of warp yarn 000 / 000 / 111 / 000, and GB2 is woven with high-elasticity, low-F-count fine fiber material; The GB3 comb uses a weave pattern disc of warp yarn 111 / 000 / 000 / 000, and the GB3 is woven from conventional polyester coarse denier low elastic super high F number fiber material; The weft yarns of the biaxial warp-knitted structure with warp and weft are high-elastic low-F-number fine fiber material and conventional polyester coarse-denier low-elastic ultra-high-F-number fiber material, with the two types of weft yarns arranged alternately. The high-elasticity low-F-number fine fiber material includes any one or more of PBT, PTT, T800 blended with PBT+PET chips and T400 blended with PTT+PET chips, and the yarn fineness is from 50D / 24F to 100D / 48F. The conventional polyester coarse denier low elastic high F-number fiber material includes conventional polyester PET DTY 75-300D / 144-576f.

2. A seat leather lower high elastic shape-retaining composite fabric according to claim 1, characterized in that, The processing of the biaxial warp-knitted fabric with warp and weft lining includes the following steps: (1) Fabric pre-shrinking; (2) After pre-shrinking the greige fabric, it is washed or dyed by overflow. (3) After washing or dyeing, the greige fabric is opened and dehydrated; (4) Fabric shaping treatment.

3. The high-elasticity, shape-retaining composite fabric under the seat leather according to claim 2, characterized in that, In step (1), the pre-shrinking of the fabric is carried out by using a steaming machine.

4. A seat leather lower high elastic shape-retaining composite fabric according to claim 2, characterized in that, In step (4), water-repellent silicone oil 15-20g / L + antistatic agent 0.8g / L + glacial acetic acid 0.5g / L are used as a setting agent and the setting is carried out at a temperature of 175-180℃ and a speed of 45-50m / min.

5. A seat leather lower high elastic shape-retaining composite fabric according to claim 1, characterized in that, The high-elasticity shape-retaining composite fabric and seat leather are bonded together as follows: hot melt adhesive is applied to the weft yarn side of one side of the high-elasticity shape-retaining composite fabric, Co-PA powder is sprinkled on it, and after the powder is blown and sucked, it is heated and cured in an oven. Then, the high-elasticity shape-retaining composite fabric is heat-pressed and bonded with the car seat leather or microfiber leather, and hard dots are applied to the other side of the high-elasticity shape-retaining composite fabric.

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