Sewing device for down jacket processing

Abstract

The invention relates to the technical field of cloth sewing devices, in particular to a sewing device for down jacket processing, which comprises a support, a sliding frame, outer-layer cloth, inner-layer cloth and a clamping piece, hardened coatings are arranged at the two ends of the inner-layer cloth in the second direction, and when the end part of the inner-layer cloth in the second direction is sewn on the outer-layer cloth, the hardened coatings are arranged on the outer-layer cloth. The inner-layer cloth provided with the hardened coating abuts against the outer-layer cloth, the probability that down overflows outwards through needle holes is reduced, in addition, the multiple pieces of inner-layer cloth are arranged between the two pieces of outer-layer cloth, the space between the two pieces of outer-layer cloth is divided into the multiple relatively-isolated independent cavities, and it is achieved that the sewing area is still filled with the down, so that the sewing efficiency is improved. The heat loss rate of the sewing area is reduced, and the comfort of wearing the down jacket is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cloth sewing devices, and in particular to a sewing device used for processing down jackets. Background Art

[0002] In the field of modern textiles and clothing, down products have always occupied an important position due to their excellent thermal insulation performance. As a natural protein fiber, down has the characteristics of low density, high fluffiness, and low thermal conductivity. The warmth retention of down per unit volume is 2.5 times that of wool and 3 times that of cotton. Down jackets achieve efficient thermal insulation through the static air layer between the down fibers. In the processing of existing down jackets, the fabrics need to be sewn. In the traditional sewing process, the micropores formed by the machine needle piercing the fabric become channels for the down to overflow. At the same time, the sewing seams are repeatedly rubbed, causing fiber damage, which increases the down drilling rate and causes the down drilling phenomenon in down jackets. In the existing sewing process, in order to prevent the down from agglomerating, the fabric is generally divided into several independent areas. However, this process results in no down filling in the sewing area, and the heat loss rate in the sewing area increases, affecting the comfort of wearing. Summary of the invention

[0003] The invention provides a sewing device for processing down jackets, so as to solve the problem that down jackets sewn by the existing down jacket sewing device have low comfort.

[0004] The present invention discloses a sewing device for processing down jackets using the following technical solution: A sewing device for processing down jackets comprises a bracket, a sliding rack, an outer layer of cloth, an inner layer of cloth and a clamping piece.

[0005] A storage table is provided on the bracket, and a guide rail is provided on the storage table, and the guide rail extends along a first direction; a sewing machine is provided on the storage table, and the sewing machine has a needle and a shuttle, and the needle reciprocates along a second direction, and the second direction is perpendicular to and coplanar with the first direction, and the shuttle is rotatably arranged on the storage table, and the shuttle and the needle are coaxially arranged; the sliding frame is slidably arranged along the guide rail; two outer layer fabrics are provided, and the two outer layer fabrics are arranged at intervals; the inner layer fabric and the outer layer fabric have the same length in the first direction, and the length of the inner layer fabric in the second direction is greater than the spacing between the two outer layer fabrics; hardened coatings are provided at both ends of the inner layer fabric in the second direction; the clamping piece is used to clamp the end of the inner layer fabric in the second direction and the outer layer fabric on the sliding frame.

[0006] Furthermore, the inner layer of fabric is bent in the second direction and then attached to the outer layer of fabric, and the needle passes through one layer of the outer layer of fabric and two layers of the inner layer of fabric when sewing the outer layer of fabric and the inner layer of fabric.

[0007] Furthermore, the inner layer fabric is bent in the second direction and then attached to the outer layer fabric, and an end portion of the inner layer fabric in the second direction is in contact with the outer layer fabric.

[0008] Furthermore, two sewing machines are arranged on the bracket, the two sewing machines are fixedly connected, the needles of the two sewing machines are coaxially arranged, and the two needles simultaneously sew the inner layer of fabric with the outer layer of fabric at both ends in the second direction.

[0009] Furthermore, the sliding frame is provided with an adjustment groove in the middle of the second direction, and the inner layer of fabric can enter the adjustment groove in the middle of the second direction. The sliding frame is provided with an adjustment member, and the adjustment member can adjust the amount of the inner layer of fabric entering the adjustment groove according to the required spacing between the two outer layers of fabric.

[0010] Furthermore, the adjusting member includes an adjusting plate and an adjusting screw, the adjusting groove extends along the first direction, the adjusting plate can be inserted into the adjusting groove, the length of the adjusting plate in the first direction is greater than the length of the inner layer of fabric in the first direction; the adjusting screw is rotatably connected to the adjusting plate, and the adjusting screw is threadedly connected to the sliding frame.

[0011] Further, the clamping member includes a clamping plate and a fastening screw, the clamping plate extends along the first direction, the clamping plate and the sliding frame have the same length in the first direction, and the fastening screw is used to fix the clamping plate on the sliding frame.

[0012] Furthermore, the clamping plate is provided with a needle threading groove, and the needle can sew the outer layer of fabric and the inner layer of fabric through the needle threading groove.

[0013] Furthermore, the hardened coating provided on both ends of the inner layer of fabric in the second direction is an anti-down drilling coating.

[0014] Furthermore, the anti-drilling coating is made of high-density polyurethane material.

[0015] The beneficial effects of the present invention are as follows: a sewing device for processing down jackets of the present invention comprises a bracket, a sliding frame, an outer layer of fabric, an inner layer of fabric and a clamping piece. When processing and sewing down jackets, the sliding frame is moved to the end of the guide rail, and the needle is aligned with the end of the sliding frame. The clamping piece is used to clamp the end of the inner layer of fabric in the second direction and the outer layer of fabric on the sliding frame, and then the sewing machine is started, the sewing machine drives the needle to reciprocate in the second direction, and then the sliding frame is pushed to move slowly on the guide rail, thereby realizing the sewing of the inner layer of fabric and the outer layer of fabric. Sewing of the outer layer of fabric; by providing a hardened coating at both ends of the inner layer of fabric in the second direction, when the ends of the inner layer of fabric in the second direction are sewn onto the outer layer of fabric, the inner layer of fabric provided with the hardened coating abuts against the outer layer of fabric, thereby reducing the probability of down overflowing through the pinholes; in addition, multiple inner layers of fabric are provided between the two outer layers of fabric, the two outer layers of fabric are divided into multiple relatively isolated independent chambers, and down filling is still present in the sewing area, thereby reducing the heat loss rate in the sewing area, thereby improving the comfort of wearing the down jacket. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic structural diagram of a sewing device for down jacket processing provided by an embodiment of the present invention; Figure 2 for Figure 1 A partial enlarged view of the middle A; Figure 3 A side view of a sewing device for processing down jackets provided by an embodiment of the present invention; Figure 4 for Figure 3 A partial enlarged view of point B in the middle; Figure 5 A partial cross-sectional view of a sewing device for processing down jackets provided by an embodiment of the present invention; Figure 6 A state diagram of different bending modes of the inner layer fabric in a sewing device for down jacket processing provided by an embodiment of the present invention.

[0018] In the figure: 110, storage table; 130, guide rail; 140, sewing machine; 141, needle; 142, shuttle; 150, sliding frame; 160, outer layer of fabric; 170, inner layer of fabric; 210, adjustment plate; 220, adjustment screw; 230, clamping plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0021] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0022] like Figures 1 to 6 As shown, an embodiment of the present invention provides a sewing device for processing down jackets, which includes a bracket, a sliding frame 150, an outer layer of fabric 160, an inner layer of fabric 170 and a clamping member.

[0023] A storage table 110 is arranged on the bracket, and the bracket can be placed on the ground or external equipment. The storage table 110 is always in a horizontal state. A guide rail 130 is fixedly arranged on the storage table 110, and the guide rail 130 extends along a first direction. In this embodiment, the first direction is a front-back direction. A sewing machine 140 is fixedly arranged on the storage table 110. The sewing machine 140 has a needle 141 and a shuttle 142. The needle 141 on the sewing machine 140 can reciprocate along a second direction. In this embodiment, the second direction is a left-right direction. The second direction is coplanar and perpendicular to the first direction. The shuttle 142 is coaxially arranged with the needle 141. The shuttle 142 is rotatably arranged on the storage table 110, and the shuttle 142 can be quickly removed from the storage table 110. The shuttle 142 is wound with sewing thread, and the shuttle 142 can cooperate with the sewing thread on the needle 141 to achieve sewing of the cloth.

[0024] The sliding frame 150 is slidably arranged along the guide rail 130 . In the initial state, the sliding frame 150 is at the end of the guide rail 130 , and the needle 141 corresponds to one end of the sliding frame 150 . The staff can push the sliding frame 150 to slide slowly on the guide rail 130 .

[0025] The outer layer fabric 160 has a width direction and a length direction. The width direction of the outer layer fabric 160 is arranged in the front-to-back direction, and the length direction of the outer layer fabric 160 is arranged in the up-down direction. Two outer layer fabrics 160 are provided, and the two outer layer fabrics 160 are arranged at intervals. The spacing direction of the two outer layer fabrics 160 is the left-right direction, and the spacing distance between the two outer layer fabrics 160 is determined by the filling amount.

[0026] The inner layer fabric 170 has a width direction and a length direction. The width direction of the inner layer fabric 170 is arranged as the front-to-back direction, and the length direction of the inner layer fabric 170 is arranged as the left-to-right direction. The inner layer fabric 170 and the outer layer fabric 160 have the same length in the front-to-back direction, and the length of the inner layer fabric 170 in the left-to-right direction is greater than the distance between the two outer layer fabrics 160. In the process of sewing the down jacket, the ends of the inner layer fabric 170 in the left-to-right direction are sewn with the outer layer fabric 160, and the sewing path is sewn along the front-to-back direction. By setting the length of the inner layer fabric 170 in the left-to-right direction, it is ensured that when the inner layer fabric 170 and the outer layer fabric 160 are sewn together, the inner layer fabric 170 will not affect the distance between the two outer layer fabrics 160. Furthermore, both ends of the inner layer fabric 170 in the second direction are provided with hardened coatings, and the hardened coatings are provided at the ends of the inner layer fabric 170 in the left and right directions. When the inner layer fabric 170 and the outer layer fabric 160 are sewn together, the position where the inner layer fabric 170 is provided with the hardened coating is the sewing position, and the inner layer fabric 170 provided with the hardened coating abuts against the outer layer fabric 160, thereby reducing the probability of down overflowing through the pinhole. In addition, multiple inner layer fabrics 170 are provided between the two outer layer fabrics 160, and the two outer layer fabrics 160 are separated into multiple relatively isolated independent chambers, and the sewing area between the inner layer fabric 170 and the outer layer fabric 160 still has down filling, thereby reducing the heat loss rate in the sewing area.

[0027] The clamping member is used to clamp the end of the inner layer fabric 170 in the second direction and the outer layer fabric 160 on the sliding frame 150. When the inner layer fabric 170 and the outer layer fabric 160 are sewn, the clamping member clamps the inner layer fabric 170 and the outer layer fabric 160, moves the sliding frame 150 to the end of the guide rail 130, and aligns the needle 141 with the end of the sliding frame 150, and then starts the sewing machine 140, which drives the needle 141 to reciprocate in the left and right directions. Subsequently, the staff pushes the sliding frame 150 to move slowly on the guide rail 130, thereby realizing the sewing of the inner layer fabric 170 and the outer layer fabric 160.

[0028] The present invention discloses a sewing device for processing down jackets. When processing and sewing down jackets, the sliding frame 150 is moved to the end of the guide rail 130, and the needle 141 is aligned with the end of the sliding frame 150. The end of the inner layer fabric 170 in the second direction and the outer layer fabric 160 are clamped on the sliding frame 150 using a clamping member. Then, the sewing machine 140 is started, and the sewing machine 140 drives the needle 141 to reciprocate in the second direction, and then the sliding frame 150 is pushed to move slowly on the guide rail 130, so as to achieve sewing of the inner layer fabric 170 and the outer layer fabric 160. By providing hardened coatings at both ends of the inner layer fabric 170 in the second direction, when the end of the inner layer fabric 170 in the second direction is sewn onto the outer layer fabric 160, the inner layer fabric 170 provided with the hardened coating abuts against the outer layer fabric 160, thereby reducing the probability of down overflowing out through the pinholes. In addition, multiple inner layer fabrics 170 are provided between the two outer layer fabrics 160, and the two outer layer fabrics 160 are divided into multiple relatively isolated independent chambers, and down filling is still present in the sewing area, thereby reducing the heat loss rate in the sewing area, thereby improving the comfort of wearing the down jacket.

[0029] In one of the embodiments, the inner fabric 170 is bent in the second direction and then attached to the outer fabric 160. When the needle 141 sews the outer fabric 160 and the inner fabric 170, it passes through one layer of the outer fabric 160 and two layers of the inner fabric 170. Specifically, when sewing the outer fabric 160 and the inner fabric 170, in order to reduce the probability of down overflowing through the needle hole, the ends of the inner fabric 170 in the left and right directions are folded. When the down escapes through the needle hole, the down needs to pass through the needle holes of three layers of fabric, which increases the resistance of the down to escape outward, thereby reducing the probability of the down overflowing outward through the needle hole.

[0030] In one of the embodiments, the inner fabric 170 is bent in the second direction and then fits against the outer fabric 160, and the end of the inner fabric 170 in the second direction is in a state of abutting against the outer fabric 160. Specifically, when the inner fabric 170 and the outer fabric 160 are sewn, since the inner fabric 170 is provided with a hardening coating at the end in the left and right directions, the hardness of the inner fabric 170 coated with the hardening coating is higher than the hardness of the outer fabric 160, and the hardness of the inner fabric 170 not coated with the hardening coating is the same as the hardness of the outer fabric 160. When the end of the inner fabric 170 is bent, it is ensured that the end of the inner fabric 170 in the left and right directions directly fits against the outer fabric 160. Under the action of the hardness coating, the end of the inner fabric 170 in the left and right directions is tightly fitted against the outer fabric 160, thereby reducing the probability of down passing through the gap between the inner fabric 170 and the outer fabric 160.

[0031] In one embodiment, the inner layer fabric 170 is bent in the second direction and then attached to the outer layer fabric 160, and the end of the inner layer fabric 170 in the second direction is in contact with the inner layer fabric 170. Figure 6 In the above state, after the inner layer fabric 170 is bent, the ends of the inner layer fabric 170 in the left and right directions are in a state of being in contact with itself. At this time, when sewing the inner layer fabric 170 and the outer layer fabric 160, the needle 141 still passes through one layer of the outer layer fabric 160 and two layers of the inner layer fabric 170. In one of the embodiments, in order to improve the stability of the sewing machine 140 when sewing the inner layer of fabric 170 and the outer layer of fabric 160, two sewing machines 140 are arranged on the bracket, the two sewing machines 140 are fixedly connected, the needles 141 of the two sewing machines 140 are arranged at intervals on the left and right, and the needles 141 of the two sewing machines 140 are in a coaxial state. When sewing the inner layer of fabric 170 and the outer layer of fabric 160, the two sewing machines 140 are started at the same time, and the two needles 141 sew the inner layer of fabric 170 and the two outer layers of fabric 160 at the same time. When the two sewing machines 140 are started, the vibrations of the two sewing machines 140 are balanced with each other, so that the inner layer of fabric 170 and the outer layer of fabric 160 are in a stable state when sewing.

[0032] In one embodiment, the sliding frame 150 is provided with an adjustment slot in the middle of the second direction. Specifically, the adjustment slot is set to open upward, the length direction of the adjustment slot is set to the front-to-back direction, and the width direction of the adjustment slot is set to the left-to-right direction. By setting the width of the adjustment slot, it is ensured that the inner layer fabric 170 can enter the adjustment slot in the middle of the left-to-right direction. Further, after the spacing between the two outer layer fabrics 160 is fixed, if it is necessary to increase the filling amount, the length of the inner layer fabric 170 in the left-to-right direction is adaptively adjusted, and the length of the inner layer fabric 170 in the left-to-right direction is increased. In order to ensure that the inner layer fabric 170 and the outer layer fabric 160 are in a flat state during sewing, the inner layer fabric 170 is inserted into the adjustment slot in the middle of the second direction, thereby ensuring that the inner layer fabric 170 is in a straight state. Furthermore, an adjusting member is provided on the sliding frame 150, and the adjusting member can adjust the amount of the inner layer fabric 170 entering the adjusting groove according to the required spacing between the two outer layer fabrics 160. By adjusting the amount of the inner layer fabric 170 entering the adjusting groove, it is ensured that the inner layer fabric 170 is in a straight state during the sewing process of the inner layer fabric 170 and the outer layer fabric 160.

[0033] In one embodiment, the adjusting member includes an adjusting plate 210 and an adjusting screw 220. The length of the adjusting groove is equal to that of the inner layer fabric 170 in the front-to-back direction. The adjusting plate 210 can be inserted into the adjusting groove. The width of the adjusting groove in the left-to-right direction is greater than the thickness of the adjusting plate 210. When the adjusting plate 210 is inserted into the adjusting groove, the adjusting plate 210 can squeeze the middle part of the inner layer fabric 170 in the left-to-right direction into the adjusting groove. The length of the adjusting plate 210 in the front-to-back direction is greater than the length of the inner layer fabric 170 in the front-to-back direction. When the adjusting plate 210 is inserted into the adjusting groove, the front and rear ends of the adjusting plate 210 are located outside the adjusting groove. The adjusting screw 220 is vertically arranged. The adjusting screw 220 is rotatably connected to the end of the adjusting plate 210. The adjusting screw 220 is threadedly connected to the sliding frame 150. When the adjusting screw 220 rotates, the adjusting plate 210 can be gradually inserted into or pulled out of the adjusting groove, thereby adjusting the amount of the inner layer fabric 170 entering the adjusting groove.

[0034] In one embodiment, the clamping member includes a clamping plate 230 and a fastening screw. The length direction of the clamping plate 230 is set to the front-to-back direction. The length of the clamping plate 230 in the front-to-back direction is equal to the length of the sliding frame 150 in the front-to-back direction. The fastening screw is used to fix the clamping plate 230 on the sliding frame 150. When the inner layer fabric 170 and the outer layer fabric 160 are sewn, the inner layer fabric 170 and the outer layer fabric 160 are clamped between the clamping plate 230 and the fixing frame. The outer layer fabric 160 and the inner layer fabric 170 are sewn in a clamped state to reduce the gap between the inner layer fabric 170 and the outer layer fabric 160. In one embodiment, two clamping plates 230 are provided, and the two clamping plates 230 clamp two outer fabrics 160 and inner fabric 170 at the same time, so as to cooperate with two sewing machines 140 to sew the two ends of the two outer fabrics 160 and the inner fabric 170 at the same time. Furthermore, the clamping plate 230 is provided with a needle threading groove, which passes through the two end surfaces of the clamping plate 230 in the left and right directions. When the clamping plate 230 is in a state of clamping the outer fabric 160 and the inner fabric 170, the needle 141 sews the outer fabric 160 and the inner fabric 170 through the needle threading groove.

[0035] In one embodiment, the hardened coating disposed at both ends of the inner fabric 170 in the second direction is an anti-down drilling coating, which reduces fiber gaps by increasing fabric density or forming a microporous barrier, thereby reducing the probability of down passing through the inner fabric 170. Furthermore, the anti-down drilling coating is made of high-density polyurethane, and in other embodiments, the anti-down drilling coating is made of polyvinyl chloride.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sewing device for down jacket processing, characterized in that: include: A bracket, wherein a storage platform is arranged on the bracket, a guide rail is arranged on the storage platform, and the guide rail extends along a first direction; a sewing machine is arranged on the storage platform, and the sewing machine has a needle and a shuttle, and the needle reciprocates along a second direction, and the second direction is perpendicular to and coplanar with the first direction, and the shuttle is rotatably arranged on the storage platform, and the shuttle and the needle are arranged coaxially; A sliding frame, wherein the sliding frame is slidably arranged along the guide rail; Outer layer fabric, wherein two outer layer fabrics are provided and the two outer layer fabrics are arranged at intervals; An inner layer of fabric, wherein the inner layer of fabric and the outer layer of fabric have the same length in the first direction, and the length of the inner layer of fabric in the second direction is greater than the distance between the two outer layers of fabric; The inner layer of fabric is provided with hardened coatings at both ends in the second direction; A clamping member is used to clamp the end of the inner layer fabric in the second direction and the outer layer fabric on the sliding frame.

2. A sewing device for down jacket processing according to claim 1, characterized in that: The inner layer of fabric is bent in the second direction and then attached to the outer layer of fabric. When the needle sews the outer layer of fabric and the inner layer of fabric, it passes through one layer of the outer layer of fabric and two layers of the inner layer of fabric.

3. A sewing device for down jacket processing according to claim 1, characterized in that: The inner layer fabric is bent in the second direction and then attached to the outer layer fabric, and an end portion of the inner layer fabric in the second direction is in contact with the outer layer fabric.

4. A sewing device for down jacket processing according to claim 1, characterized in that: Two sewing machines are arranged on the bracket, the two sewing machines are fixedly connected, the needles of the two sewing machines are coaxially arranged, and the two needles sew the two ends of the inner layer of fabric in the second direction with the outer layer of fabric at the same time.

5. The sewing device for down jacket processing according to claim 1, characterized in that: The sliding frame is provided with an adjustment groove in the middle of the second direction, and the inner layer of fabric can enter the adjustment groove in the middle of the second direction. The sliding frame is provided with an adjustment member, and the adjustment member can adjust the amount of the inner layer of fabric entering the adjustment groove according to the required spacing between the two outer layers of fabric.

6. A sewing device for down jacket processing according to claim 5, characterized in that: The adjusting member includes an adjusting plate and an adjusting screw, the adjusting groove extends along the first direction, the adjusting plate can be inserted into the adjusting groove, and the length of the adjusting plate in the first direction is greater than the length of the inner layer of fabric in the first direction; the adjusting screw is rotatably connected to the adjusting plate, and the adjusting screw is threadedly connected to the sliding frame.

7. The sewing device for down jacket processing according to claim 1, characterized in that: The clamping member includes a clamping plate and a fastening screw. The clamping plate extends along the first direction. The clamping plate and the sliding frame have the same length in the first direction. The fastening screw is used to fix the clamping plate on the sliding frame.

8. A sewing device for down jacket processing according to claim 7, characterized in that: The clamping plate is provided with a needle threading groove, and the needle can sew the outer layer of fabric and the inner layer of fabric through the needle threading groove.

9. The sewing device for down jacket processing according to claim 1, characterized in that: The hardened coatings provided on both ends of the inner layer of fabric in the second direction are anti-down drilling coatings.

10. A sewing device for down jacket processing according to claim 9, characterized in that: The anti-drilling velvet coating is made of high-density polyurethane material.

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