3D printing down feather fabric and preparation method thereof

Abstract

The application discloses a kind of 3D printing down feather fabric and preparation method, its preparation method includes: S1, the inside of bottom layer fabric and the inside of surface layer fabric are sanding treatment;S2, after hot melting base resin, first anchor point is printed in the inside of bottom layer fabric by 3D printing nozzle according to preset horizontal and vertical interval, and the down feather filling space is formed between each first anchor point, and the coordinate position of first anchor point is recorded;S3, in down feather filling space, lay down feather layer;S4, after hot melting elastic resin, it is sprayed on down feather layer by 3D printing nozzle, and form elastic lock down feather layer;S5, repeat S3 and S4, complete the laying of preset number of down feather layer;S6, second anchor point is printed in the coordinate position of first anchor point, after spraying base resin on the inside of surface layer fabric, cover on second anchor point, press together and solidification treatment.The application prevents down feather by printing anchor point, on the other hand, reliable combination of surface layer fabric and bottom layer fabric is realized by anchor point, and the binding force between fabric is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fabric preparation, and in particular to a 3D printed down fabric and a preparation method thereof. Background Art

[0002] With the development and maturity of 3D printing technology, printing fabrics with 3D printers has become a new way of preparing fabrics.

[0003] Specifically, 3D printing involves printing an intermediate fabric layer on a base layer, then laminating the top layer onto the printed layer to complete the fabric. This method, for down fabrics, results in poor interlayer bonding, prone to down scattering, and difficulty ensuring even down distribution during the production process. Therefore, there is still room for improvement. Summary of the Invention

[0004] One of the purposes of the present invention is to provide a method for preparing 3D printed down fabrics, so as to at least to some extent solve the defects of 3D printed down fabrics such as poor interlayer bonding and easy down running.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A method for preparing 3D printed down fabric, comprising:

[0007] S1. performing sanding treatment on the inner side of the bottom layer fabric and the inner side of the surface layer fabric respectively;

[0008] S2. After hot-melting the base resin, first anchor points are printed on the inner side of the bottom fabric at preset horizontal and vertical intervals using a 3D printing nozzle, forming down-filled spaces between the first anchor points, and recording the coordinate positions of the first anchor points;

[0009] S3, laying a down layer in the down filling space according to a preset down thickness;

[0010] S4, hot-melting the elastic resin and spraying it on the down layer through a 3D printing nozzle according to a preset pattern to form an elastic down-locking layer;

[0011] S5, repeating steps S3 and S4 to complete laying of a preset number of down layers, with the elastic down-locking layer sprayed on the last down layer;

[0012] S6. After hot-melting the base resin, print the second anchor point at the coordinate position of the first anchor point through a 3D printing nozzle. After spraying the base resin on the inner side of the surface fabric, cover the second anchor point, press into shape, and cure.

[0013] Further, the total height of the first anchor point and the second anchor point is equal to the total thickness of the down of the finished fabric, and the height of the first anchor point is greater than 3 / 4 of the total height.

[0014] Further, in S2, when printing the first anchor point, a pull thread is formed between adjacent first anchor points; in S6, when printing the second anchor point, a pull thread is formed between adjacent second anchor points.

[0015] Further, the base resin is subjected to a moisture treatment.

[0016] Further, the spider web structures are distributed at intervals, and adjacent spider web structures are arranged in a staggered manner.

[0017] Further, adjacent elastic lock down layers are arranged in a staggered manner.

[0018] Further, the curing treatment includes a preheating treatment and ultraviolet light curing.

[0019] Further, the base resin is an APAO modified polypropylene resin.

[0020] Further, the elastic resin is a PA resin.

[0021] The second object of the present application is to provide a 3D printed down fabric.

[0022] To achieve the above object, the present application adopts the following technical solutions:

[0023] A 3D printed down fabric includes a bottom layer fabric, a plurality of down layers, a plurality of elastic lock down layers, and a surface layer fabric, the plurality of down layers and the plurality of elastic lock down layers are arranged in a staggered manner, and are formed by the method as described above.

[0024] Further, the bottom layer fabric and the surface layer fabric are polyester.

[0025] After adopting the above technical solutions, the present application has the following advantages compared with the background art:

[0026] 1. The present application prints anchor points, which on the one hand forms a filling space for down to prevent down from running, and on the other hand realizes reliable combination of the surface layer fabric and the bottom layer fabric through the anchor points, thereby improving the bonding force between the fabrics;

[0027] 2. The present application forms a pull thread between adjacent anchor points when printing the anchor points, which further prevents down from running and falling out of the surface layer fabric and the bottom layer fabric; at the same time, the connection between the layers is realized through the pull thread structure or the elastic lock down layer; the down of the present application adopts the strategy of laying a small amount of down at a time and multiple times, and the elastic lock down layer is arranged on each layer of down to ensure uniform distribution of the down;

[0028] 3. The present invention disposes the adjacent elastic locking fleece layers in a staggered manner, thereby further improving the fleece locking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the fabric preparation process of the present invention;

[0030] Figure 2 This is a schematic diagram of the fabric structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the elastic locking fleece layer of the present invention;

[0032] Figure 4 For Figure 3 Schematic diagram of the adjacent stretch lock fleece layers shown;

[0033] Figure 5 Schematic diagram of the superposition of adjacent elastic lock fleece layers.

[0034] Description of reference numerals:

[0035] 100, bottom fabric; 110, first anchor point; 120, second anchor point; 130, brushed;

[0036] 200, down layer;

[0037] 300, elastic lock fleece layer; 310, spider web structure;

[0038] 400, surface fabric. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, it should be noted that:

[0040] The terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element of the present invention must have a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0041] When an element is referred to as being “fixed to,” “disposed on,” or “provided on” another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0042] Unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0043] Example 1

[0044] Please refer to Figure 1 and Figure 2 As shown, the present invention discloses a method for preparing 3D printed down fabric, which includes:

[0045] S1, performing a sanding treatment on the inner side of the bottom layer fabric 100 and the inner side of the surface layer fabric 400 respectively;

[0046] S2. After hot-melting the base resin, first anchor points 110 are printed on the inner side of the bottom fabric 100 at preset horizontal and vertical intervals using a 3D printing nozzle. Down-filled spaces are formed between the first anchor points 110 , and the coordinate positions of the first anchor points 110 are recorded.

[0047] S3, laying a down layer 200 in the down filling space according to a preset down thickness;

[0048] S4, hot-melting the elastic resin and spraying it onto the down layer 200 through a 3D printing nozzle according to a preset pattern to form an elastic down-locking layer 300;

[0049] S5, repeating steps S3 and S4 to complete laying of a preset number of down layers 200, and spraying the elastic locking down layer 300 on the last down layer 200;

[0050] S6. After hot-melting the base resin, print the second anchor point 120 on the first anchor point 110 through a 3D printing nozzle. After spraying the base resin on the inner side of the surface fabric 400, cover the second anchor point 120 and press it.

[0051] Specifically, in S2, the APAO modified polypropylene resin is used as the base resin to print the first anchor points 110 on the inner side of the bottom layer fabric 100 (before printing the first anchor points 110, a layer of base resin can be sprayed on the inner side of the bottom layer fabric 100 in mist form). The first anchor points 110 are arranged in a dot array. The density of the first anchor points 110 should not be too high, otherwise the fabric will become hard and the space for filling the down will be reduced. The density of the first anchor points 110 should also not be too low, otherwise the function of the first anchor points 110 as the anchor points for interlayer bonding and down locking will be weakened. In an alternative embodiment, the distance between the first anchor points 110 is 8-20 mm, and the diameter of the first anchor points 110 is 1-3 mm.

[0052] The total height of the first anchor points 110 and the second anchor points 120 is equal to the total thickness of the down of the finished fabric. It is easy to understand that the total thickness of the down of the finished fabric described herein is not the total thickness of the down when it is laid, but the down is in a fluffy state when it is laid, and it is shaped into the final finished fabric after the fabric is pressed together. Therefore, the total thickness of the down of the finished fabric is less than the total thickness of the down when it is laid. In order to make the first anchor points 110 play a role in locking the down during the laying of the down, the height of the first anchor points 110 should be greater than 3 / 4 of the total height.

[0053] In order to improve the down locking effect of the first anchor points 110, in S2, when the first anchor points 110 are printed, a filament 130 is formed between adjacent first anchor points 110.

[0054] The filament 130 is a printing defect that may occur in 3D printing and should be avoided during printing. The present application promotes the occurrence of this defect to make use of the filament 130 generated by the nozzle walking between the first anchor points 110 to make the down tightly cling to the three-dimensional grid formed by the filament 130, better fixing the down and preventing the down from running. In the present application, the filament 130 is promoted by humidifying the base resin, i.e. placing the base resin in a humidifying box with a humidity of 60-80% for 1-2 days.

[0055] Since the down is light, the laying of the down needs to be carried out multiple times, and an appropriate amount of down is laid each time, and then the down is locked through the mesh structure formed by the elastic down locking layer 300. Please refer to Figure 3-Figure 5 In the present embodiment, the elastic down locking layer 300 includes a plurality of spider web structures 310, and adjacent spider web structures 310 are connected by a plurality of spider web lines.

[0056] In a multi-layer down structure, to prevent the fabric from becoming stiff due to the dense elastic down layers 300 in each layer, the elastic down layers 300 of the present application utilize spaced spider web structures 310. Adjacent elastic down layers 300 are staggered, effectively locking the down while reducing the density of the elastic down layers 300. Preferably, the spider web threads between adjacent spider web structures 310 are interwoven at locations corresponding to the spider web structures 310 in adjacent elastic down layers 300.

[0057] Similarly, in S6, when printing the second anchor points 120, wire drawing 130 is formed between adjacent second anchor points 120. The base resin thereof adopts the base resin that has been subjected to moisture treatment in S2.

[0058] The purpose of printing the second anchor point 120 is to ensure that after the multiple layers of down are laid and the elastic lock down layer 300 is printed, the first anchor point 110 is covered by these layers (basically, the height of the first anchor point 110 is higher than the thickness of these layers, and the surface of the first anchor point 110 will also be covered by these layers). Therefore, in order to ensure that the surface fabric 400 and the bottom fabric 100 are reliably bonded, the second anchor point 120 is printed according to the coordinate position of the first anchor point 110 recorded in S2. Then, after spraying the base resin on the inside of the surface fabric 400, it is covered on the second anchor point 120 and pressed to obtain the fabric. In this way, the second anchor point 120 will press the position covered by the first anchor point 110, and at the same time, the second anchor point 120 can be tightly bonded to the surface fabric 400, improving the bonding strength.

[0059] In this application, the curing process includes preheating and UV curing to ensure the stability of the fabric structure, and preheating to remove internal stress and improve the curing effect.

[0060] The preheating temperature is 40°C-55°C. Electric heating or air heating can be used. The preheating temperature and time should be determined according to the material characteristics. The printed down fabric is placed in the curing equipment to ensure that the fabric is evenly exposed to ultraviolet radiation. The ultraviolet radiation promotes the curing and bonding of the interlayer resin.

[0061] In this application, the base resin is preferably APAO modified polypropylene resin, which is non-toxic and odorless, and is not easy to become brittle, so that the printed fabric has a certain strength and toughness while maintaining flexibility, and it has good substrate adhesion and is well compatible with polyester fabrics to achieve bonding.

[0062] In the present application, the elastic resin is preferably PA resin (polyamide), which has good flexibility and elasticity and can lock the down layer 200 .

[0063] Example 2

[0064] Please refer to Figure 2As shown, a 3D printed down fabric comprises a base fabric 100, a plurality of down layers 200, a plurality of elastic lock down layers 300 and a surface fabric 400. The plurality of down layers 200 and the plurality of elastic lock down layers 300 are arranged alternately and are formed by the method of Example 1.

[0065] In this embodiment, the bottom layer fabric and the surface layer fabric are polyester.

[0066] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A method for preparing 3D printed down fabric, characterized in that: include: S1. performing sanding treatment on the inner side of the bottom layer fabric and the inner side of the surface layer fabric respectively; S2. After hot-melting the base resin, first anchor points are printed on the inner side of the bottom fabric at preset horizontal and vertical intervals using a 3D printing nozzle, forming down-filled spaces between the first anchor points, and recording the coordinate positions of the first anchor points; S3, laying a down layer in the down filling space according to a preset down thickness; S4, hot-melting the elastic resin and spraying it on the down layer through a 3D printing nozzle according to a preset pattern to form an elastic down-locking layer; S5, repeating steps S3 and S4 to complete laying of a preset number of down layers, with the elastic down-locking layer sprayed on the last down layer; S6. After hot-melting the base resin, print the second anchor point at the coordinate position of the first anchor point through a 3D printing nozzle. After spraying the base resin on the inner side of the surface fabric, cover the second anchor point, press into shape, and cure.

2. The method for preparing a 3D printed down fabric according to claim 1, wherein: The total height of the first anchor point and the second anchor point is equal to the total thickness of the down of the finished fabric, and the height of the first anchor point is greater than 3 / 4 of the total height.

3. The method for preparing a 3D printed down fabric according to claim 1, wherein: In S2, when printing the first anchor points, a wire drawing is formed between adjacent first anchor points; in S6, when printing the second anchor points, a wire drawing is formed between adjacent second anchor points.

4. The method for preparing a 3D printed down fabric according to claim 3, wherein: In S2 and S6, the base resin is subjected to a moisture treatment.

5. The method for preparing 3D printed down fabric according to claim 1, wherein: In S4, the elastic locking fleece layer includes a plurality of spider web structures.

6. The method for preparing 3D printed down fabric according to claim 5, characterized in that: The spider web structures are distributed at intervals, and adjacent spider web structures are staggered.

7. The method for preparing a 3D printed down fabric according to claim 6, wherein: The curing process includes preheating and UV light curing.

8. The method for preparing 3D printed down fabric according to claim 1, wherein: The base resin is APAO modified polypropylene resin; the elastic resin is PA resin.

9. A 3D printed down fabric, characterized by: The invention comprises a bottom layer fabric, a plurality of down layers, a plurality of elastic lock down layers and a surface layer fabric, wherein the plurality of down layers and the plurality of elastic lock down layers are arranged in an alternating manner and are formed by the method according to any one of claims 1 to 8.

10. The 3D printed down fabric according to claim 9, characterized in that: The bottom layer fabric and the surface layer fabric are polyester.

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