A double-layer flame-retardant fabric and a preparation method thereof

Abstract

The application provides a double-layer flame-retardant fabric and a preparation method thereof. The flame-retardant fabric comprises a connecting belt, a flame-retardant layer and a wear-resistant layer. The preparation method mainly comprises the following steps: step one, generating flame-retardant polyester yarn by using flame-retardant polyester chips; step two, soaking the flame-retardant polyester yarn in a flame retardant to form flame-retardant threads; step three, weaving the flame-retardant threads and the wear-resistant layer raw materials; step four, coating the fabric with a flame retardant; and step five, connecting the wear-resistant layer and the flame-retardant layer through a weaving strip and then performing a subsequent sewing process. In the preparation method of the double-layer flame-retardant fabric, the flame-retardant polyester yarn is soaked in the flame retardant to form flame-retardant threads, and then the flame-retardant threads and the wear-resistant layer are woven to form a fabric material. After that, the flame-retardant fabric and the wear-resistant layer are coated with the flame retardant again, so that the flame-retardant effect is further improved. The interlayer is arranged between the flame-retardant fabric and the wear-resistant layer, so that the maintenance time of the high-efficiency flame-retardant effect of the flame retardant is prolonged.

Description

Technical Field

[0001] The invention relates to the field of flame-retardant fabrics, in particular to a double-layer flame-retardant fabric and a preparation method thereof. Background Art

[0002] Flame-retardant fabrics are materials that have flame-retardant properties, such as fabrics made of aramid, acrylic, etc. Another type is made of cotton, polyester, etc., with a layer of flame-retardant coating added to achieve the flame-retardant effect. Flame-retardant fabrics themselves have extremely strong flame-retardant properties and can be used in interior decoration materials, protective clothing, industrial textiles and other fields.

[0003] In the existing technology, after spinning is completed, the surface of the fabric is coated with a flame retardant to provide a flame retardant effect. However, since the flame retardant is exposed to the outside, it will fall off after being rubbed, reducing its flame retardant performance and making it difficult to maintain a high flame retardant effect for a long time. On the other hand, when sewing the flame retardant fabric, the sewing thread used cannot achieve the same flame retardant ability as the fabric part, so it is easy for the sewing thread part to break after encountering an open flame. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a double-layer flame-retardant fabric and a preparation method thereof to solve the problems raised in the above-mentioned background technology. The present invention is coated with a double layer of flame retardant, and the flame retardant is partially hidden inside the interlayer, which delays the detachment of the flame retardant, and blocks the sewing thread part through the built-in connecting belt, reducing the probability of the sewing thread part being disconnected.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solution: a double-layer flame-retardant fabric, including a flame-retardant fabric body, the flame-retardant fabric body including a connecting belt, a flame-retardant layer and a wear-resistant layer, the flame-retardant layer is mainly composed of a flame-retardant polyester silk fabric, the wear-resistant layer is mainly composed of acrylic fiber, the connecting belt is arranged in the middle position between the flame-retardant layer and the wear-resistant layer, and an interlayer is arranged between the flame-retardant layer and the wear-resistant layer, a plurality of connecting belts are provided, and the intervals between each connecting belt are the same.

[0006] Furthermore, the inner sides of the acrylic fiber and the flame-retardant polyester yarn are coated with a flame retardant, and the edges of the flame-retardant layer and the wear-resistant layer are sealed by sewing.

[0007] Furthermore, the flame retardant is an inorganic flame retardant material such as magnesium hydroxide, and the top and bottom of the connecting belt are sewn together with the flame retardant layer and the wear-resistant layer respectively.

[0008] Furthermore, the connecting belt includes a textile strip and an elastic belt, the elastic belt is arranged in the middle position of the two textile strips, a gap is provided between two adjacent connecting belts, and the surface of the textile strip is respectively connected to the flame retardant layer and the wear-resistant layer as a whole through the first sewing thread.

[0009] Furthermore, a thickening layer is provided on the top of the connecting belt, and both sides of the thickening layer are fixedly connected to the textile strip parts on the two adjacent connecting belts, and the double-layer flame-retardant fabric body part is connected by a second sewing thread.

[0010] Furthermore, the second sewing thread passes through the inside of the gap, and the second sewing thread is partially blocked by the thickening layer.

[0011] A method for preparing a double-layer flame-retardant fabric, which is used to prepare the flame-retardant fabric body as described above, mainly includes the following steps: step 1, using flame-retardant polyester chips to generate flame-retardant polyester yarn; step 2, soaking the flame-retardant polyester yarn in a flame retardant to form a flame-retardant yarn; step 3, using the flame-retardant defense line and the wear-resistant layer raw materials for weaving processing; step 4, coating the fabric portion with a flame retardant; step 5, connecting the wear-resistant layer and the flame-retardant layer through a textile strip, and performing a subsequent sewing process.

[0012] Furthermore, in step three, the wear-resistant layer uses acrylic fiber as a raw material, and the acrylic fiber does not need to be soaked in a flame retardant before being woven.

[0013] Furthermore, the flame retardant is evenly coated on the inner area where the flame retardant layer and the wear-resistant layer face each other through a coating device, each layer of the flame retardant fabric body is composed of a single layer of flame retardant layer and a wear-resistant layer, and the double-layer flame retardant fabric body is sewn by using a second sewing thread to penetrate into the interior of the top layer of the flame retardant fabric body interlayer.

[0014] Beneficial effects of the present invention:

[0015] 1. In the preparation method of the double-layer flame-retardant fabric, the flame-retardant polyester yarn is immersed in the flame retardant to form the flame-retardant yarn. After the fabric material is woven, the flame retardant is coated on the surface of the flame-retardant fabric and the wear-resistant layer again, thereby further improving the flame retardant effect of the flame retardant and ensuring that the flame retardant can be evenly penetrated into any position of the two fabrics.

[0016] 2. The double-layer flame-retardant fabric is provided with an interlayer between the flame-retardant fabric and the wear-resistant layer, and the side coated with the flame retardant is facing the inside of the interlayer. Therefore, when the textile is subsequently completed, the flame retardant can be prevented from being exposed to the outside for a long time, which may cause the flame retardant to be detached due to friction, thereby extending the adhesion time of the flame retardant and the maintenance time of the high-efficiency flame retardancy.

[0017] 3. The double-layer flame-retardant fabric connects the flame-retardant layer and the wear-resistant layer through a connecting belt, and each two connecting belts are arranged in opposite directions to each other. Therefore, when the flame-retardant fabric is subsequently overlapped and sewn, the second sewing thread part can be hidden by the gap between the two connecting belts, and the outermost flame-retardant layer and the second sewing thread part of the thickened layer are used to block it, reducing the probability of sewing thread breakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the appearance of a double-layer flame-retardant fabric of the present invention;

[0019] Figure 2 This is a side sectional view of a double-layer flame-retardant fabric of the present invention;

[0020] Figure 3 This is a schematic structural diagram of a connecting belt portion of a double-layer flame-retardant fabric according to the present invention;

[0021] Figure 4 This is a side sectional view of a double-layer flame-retardant fabric of the present invention being sewn;

[0022] Figure 5 This is a flow chart of a method for preparing a double-layer flame-retardant fabric according to the present invention;

[0023] In the figure: 1. wear-resistant layer; 2. flame-retardant layer; 3. connecting belt; 4. acrylic fiber; 5. flame-retardant polyester yarn; 6. interlayer; 7. flame retardant; 8. textile strip; 9. elastic belt; 10. first sewing thread; 11. gap; 12. thickening layer; 13. second sewing thread. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] See also Figures 1 to 5The present invention provides a technical solution: a double-layer flame-retardant fabric, including a flame-retardant fabric body, the flame-retardant fabric body including a connecting belt 3, a flame-retardant layer 2 and a wear-resistant layer 1, the flame-retardant layer 2 is mainly composed of a flame-retardant polyester yarn 5 textile, and the wear-resistant layer 1 is mainly composed of an acrylic fiber 4, the connecting belt 3 is arranged in the middle position between the flame-retardant layer 2 and the wear-resistant layer 1, and an interlayer 6 is arranged between the flame-retardant layer 2 and the wear-resistant layer 1, a plurality of connecting belts 3 are provided, and the intervals between each connecting belt 3 are the same, the double-layer flame-retardant fabric connects the flame-retardant layer 2 and the wear-resistant layer 1 through the inner connecting belt 3, and an interlayer 6 is arranged on the inner side of the flame-retardant layer 2 and the wear-resistant layer 1, the inner sides of the two flame-retardant layers 2 and the wear-resistant layer 1 are coated with a flame retardant 7, the flame-retardant layer 2 is exposed to the outside when in use, and the flame-retardant layer 2 and the double-layer flame retardant 7 inside the interlayer 6 are used to achieve a flame-retardant effect, wherein the flame-retardant layer 2 is woven with the flame-retardant polyester yarn 5, and the wear-resistant layer 1 is woven with the acrylic fiber 4.

[0026] In this embodiment, the inner sides of the acrylic fiber 4 and the flame retardant polyester yarn 5 are coated with a flame retardant 7, and the edges of the flame retardant layer 2 and the wear-resistant layer 1 are sealed after sewing. The flame retardant 7 is made of an inorganic flame retardant 7 material such as magnesium hydroxide. The top and bottom of the connecting belt 3 are sewn together with the flame retardant layer 2 and the wear-resistant layer 1 respectively. An interlayer 6 is provided between the flame retardant fabric and the wear-resistant layer 1, and the side coated with the flame retardant 7 is facing the inside of the interlayer 6. Therefore, when the textile is subsequently completed and used, it can avoid the flame retardant 7 being exposed to the outside for a long time, causing the flame retardant 7 to be detached due to friction. The situation is improved, which prolongs the adhesion time of the flame retardant 7 and the maintenance time of the high-efficiency flame retardancy. Specifically, magnesium hydroxide is used as the flame retardant 7, and it is coated on the inner side of the flame retardant layer 2 and the wear-resistant layer 1 to achieve the subsequent flame retardant effect. When encountering an open flame, magnesium hydroxide releases bound water when it is thermally decomposed, and absorbs a large amount of latent heat to reduce the surface temperature of the synthetic material it is filled with in the flame, which has the effect of inhibiting the decomposition of the polymer and cooling the generated combustible gas, and the flame retardant 7 is shielded and protected by the interlayer 6 to avoid the situation where the flame retardant 7 is detached due to friction for a long time.

[0027] The connecting band 3 includes a textile strip 8 and an elastic band 9 arranged in the middle position of the two textile strips 8, a gap 11 is arranged between the two adjacent connecting bands 3, the surface of the textile strip 8 is connected as a whole with the flame-retardant layer 2 and the wear-resistant layer 1 through the first sewing thread 10, the top of the connecting band 3 is provided with a thickened layer 12, and the two sides of the thickened layer 12 are respectively fixedly connected with the textile strips 8 on the two adjacent connecting bands 3, the double-layer flame-retardant fabric body part is connected through the second sewing thread 13, the second sewing thread 13 passes from the inside of the gap 11, and the second sewing thread 13 is partially blocked by the thickened layer 12, the flame-retardant layer 2 and the wear-resistant layer 1 are connected through the connecting band 3, and every two connecting bands 3 are reversely arranged, so that when the flame-retardant fabric is subsequently overlapped and sewn, the second sewing thread 13 part can be hidden through the gap 11 between the two connecting bands 3, the second sewing thread 13 part is shielded by the outermost flame-retardant layer 2 and the thickened layer 12, the probability of breaking of the sewing thread is reduced, the inner flame-retardant agent 7 part is supported by the connecting band 3, frequent friction between the two sides of the flame-retardant agent 7 is avoided, the service life of the flame-retardant agent 7 is further prolonged, and the thickened layer 12 on the two connecting bands 3 can be used to shield the second sewing thread 13 part when the multi-layer double-layer flame-retardant fabric is subsequently sewn and connected from the bottom of each layer of double-layer flame-retardant fabric, so that the second sewing thread 13 can be prevented from passing out of the surface of the topmost double-layer flame-retardant fabric, and the protection function of the second sewing thread 13 part is realized.

[0028] The embodiment provides a double-layer flame-retardant fabric preparation method, which is used for preparing the flame-retardant fabric body as described above, and mainly includes the following steps: step one, generating flame-retardant polyester chips to generate flame-retardant polyester threads 5; step two, soaking the flame-retardant polyester threads 5 in a flame-retardant agent 7 to form flame-retardant threads; step three, weaving the flame-retardant threads and the wear-resistant layer 1 raw materials; step four, coating the fabric part with the flame-retardant agent 7; and step five, connecting the wear-resistant layer 1 and the flame-retardant layer 2 through the textile strip 8 and performing a subsequent sewing process, wherein the connecting band 3 is provided with an elastic band 9, so that the interlayer 6 part between the flame-retardant layer 2 and the wear-resistant layer 1 can be expanded by reversely pulling the flame-retardant layer 2 and the wear-resistant layer 1, a certain elasticity is provided, and the subsequent second sewing thread 13 is facilitated to pass through and be sewn.

[0029] In this embodiment, in step three, the wear-resistant layer 1 uses acrylic fiber 4 as raw material, and the acrylic fiber 4 does not need to be soaked in the flame retardant 7 before weaving. The flame retardant 7 is evenly coated on the inner area facing the flame retardant layer 2 and the wear-resistant layer 1 by a coating device. Each layer of the flame-retardant fabric body is composed of a single-layer flame-retardant layer 2 and a wear-resistant layer 1, and the double-layer flame-retardant fabric body is sewn by using a second sewing thread 13 to penetrate into the top layer of the flame-retardant fabric body interlayer 6. The flame-retardant polyester yarn 5 is soaked in the flame retardant 7 to form a flame-retardant yarn. After the weaving is completed to form the fabric material, the flame retardant fabric and the wear-resistant layer 1 surface are coated with the flame retardant 7 again, which further improves the flame retardant effect of the flame retardant 7 and ensures that the flame retardant 7 can be evenly penetrated into any position of the two fabrics. The double-layer flame-retardant fabric is subsequently combined and connected using the second sewing thread 13 according to the application environment, and the second sewing thread 13 is always hidden.

[0030] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all points of view, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0031] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A double-layer flame-retardant fabric, comprising a flame-retardant fabric body, characterized in that: The flame-retardant fabric body comprises a connecting belt (3), a flame-retardant layer (2) and a wear-resistant layer (1), wherein the flame-retardant layer (2) is mainly composed of a textile material of flame-retardant polyester yarn (5), and the wear-resistant layer (1) is mainly composed of acrylic fiber (4). The connecting belt (3) is arranged in the middle position between the flame-retardant layer (2) and the wear-resistant layer (1), and an interlayer (6) is arranged between the flame-retardant layer (2) and the wear-resistant layer (1). The connecting belt (3) is provided in plurality, and the intervals between each connecting belt (3) are the same. The connecting belt (3) comprises a textile strip (8) and an elastic belt (9), and the elastic belt (9) is arranged in the middle of two textile strips (8). In terms of position, a gap (11) is provided between two adjacent connecting belts (3), and the surface of the textile strip (8) is connected to the flame retardant layer (2) and the wear-resistant layer (1) as a whole through a first sewing thread (10), and a thickening layer (12) is provided on the top of the connecting belt (3), and both sides of the thickening layer (12) are fixedly connected to the textile strip (8) parts on the two adjacent connecting belts (3), and the double-layer flame retardant fabric body is connected through a second sewing thread (13), and the second sewing thread (13) passes through the inside of the gap (11), and the second sewing thread (13) is partially blocked by the thickening layer (12).

2. The double-layer flame-retardant fabric according to claim 1, characterized in that: The inner sides of the acrylic fiber (4) and the flame-retardant polyester yarn (5) are coated with a flame retardant (7), and the edges of the flame-retardant layer (2) and the wear-resistant layer (1) are sealed by sewing.

3. The double-layer flame-retardant fabric according to claim 2, characterized in that: The flame retardant (7) is made of magnesium hydroxide inorganic flame retardant material, and the top and bottom of the connecting belt (3) are sewn together with the flame retardant layer (2) and the wear-resistant layer (1) respectively to form a whole.

4. A method for preparing a double-layer flame-retardant fabric, characterized in that: The preparation method is used to prepare the flame-retardant fabric body as claimed in claim 1, and mainly comprises the following steps: step 1, using flame-retardant polyester chips to generate flame-retardant polyester yarn (5); step 2, soaking the flame-retardant polyester yarn (5) in a flame retardant (7) to form a flame-retardant yarn; step 3, using the flame-retardant yarn and the raw material of the wear-resistant layer (1) for weaving processing; step 4, coating the fabric part with the flame retardant (7); step 5, connecting the wear-resistant layer (1) and the flame-retardant layer (2) through a textile strip (8), and performing a subsequent sewing process.

5. The method for preparing a double-layer flame-retardant fabric according to claim 4, characterized in that: In step three, the wear-resistant layer (1) uses acrylic fiber (4) as a raw material, and the acrylic fiber (4) does not need to be soaked in a flame retardant (7) before being woven.

6. The method for preparing a double-layer flame-retardant fabric according to claim 4, characterized in that: The flame retardant (7) is evenly coated on the inner area of ​​the flame retardant layer (2) and the wear-resistant layer (1) facing each other by a coating device, and each flame retardant fabric body portion is composed of a single flame retardant layer (2) and a wear-resistant layer (1).

7. The method for preparing a double-layer flame-retardant fabric according to claim 6, characterized in that: The double-layer flame-retardant fabric body is sewn by using a second sewing thread (13) to penetrate into the interior of the flame-retardant fabric body interlayer (6) of the top layer.

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