Cotton fiber polyester fiber composite hot melt sheeting, method of making and quilt

Abstract

The application provides a polyester fiber composite hot melt batting, a preparation method thereof and a quilt. The preparation method comprises the following steps: S1. mixing diacid, dihydric alcohol and antimony trioxide, and performing esterification reaction in a protective gas atmosphere, dehydration, adding trimethyl phosphate, and performing polycondensation reaction; the diacid comprises terephthalic acid, isophthalic acid and adipic acid, and the dihydric alcohol comprises diethylene glycol and ethylene glycol; the melt is extruded, cooled, and cut into pieces; the modified polyester piece is vacuum dried and then melt-spun and stretched; S2. the modified polyester fiber is made into a fiber web together with polyester fiber and cotton fiber; S3. three layers of the fiber web are stacked and hot-pressed, and the molten modified polyester fiber bonds the three layers of the fiber web together to form a batting. The batting is safe and environmentally friendly, and the problem of environmental pollution caused by the use of adhesive in the preparation process of the synthetic batting in the prior art is avoided.

Description

Technical Field

[0001] This application relates to the field of textile technology, and in particular to cotton fiber and polyester fiber composite hot melt wadding, its preparation method and quilt. Background Technology

[0002] The wadding is the core filling material of a quilt, directly determining its warmth, fluffiness, skin-friendliness, and lifespan. The material of the wadding has gradually shifted from natural fibers such as cotton and linen to synthetic fibers.

[0003] Based on their material, flocculent flakes can be divided into the following types: (1) Natural fiber wadding: This type of wadding uses cotton, wool, and silk as the main raw materials. It is formed by combing into a web and laying it into shape. It has advantages such as being skin-friendly and natural and environmentally friendly. However, cotton fiber wadding is heavy and has poor resilience after being compacted. It is easy to harden and become stiff after use, and its warmth retention is greatly reduced. Wool wadding is prone to insect infestation and mildew. Some people may experience odor allergies. It is also more expensive. Silk wadding has low strength, is brittle and easily breaks. It has poor washability and is difficult to meet the needs of long-term use.

[0004] (2) Synthetic fiber wadding: This type of wadding is usually made of polyester fiber or polypropylene fiber as the main raw material to form a fiber web. Several layers of fiber web are bonded together with adhesives to form wadding. This type of wadding is low in cost and does not easily clump. However, traditional solvent-based adhesives contain volatile harmful organic compounds such as formaldehyde and benzene series, which will continue to be released slowly over a long period of time after bonding and curing. This will not only cause odor residue, but also affect indoor air quality and pose a potential threat to human health. Although some water-based adhesives reduce the emission of volatile harmful organic compounds, they still need to add stabilizers and other additives, which poses a risk of residual trace amounts of harmful substances. Summary of the Invention

[0005] This application provides a cotton fiber-polyester fiber composite hot melt wadding sheet, its preparation method, and a quilt to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the technical solution of this application is as follows: This application provides a method for preparing a cotton fiber-polyester fiber composite hot-melt wadding sheet, comprising the following steps: S1. Mix diacid, diol and antimony trioxide to obtain a mixture, and carry out esterification reaction in a protective gas atmosphere, dehydrate, add trimethyl phosphate, and carry out polycondensation reaction to obtain a melt; The dicarboxylic acid includes terephthalic acid, isophthalic acid and adipic acid, and the diol includes diethylene glycol and ethylene glycol; The melt is extruded, cooled, and sliced ​​to obtain modified polyester chips; The modified polyester chips were vacuum dried, then melt-spun and stretched to obtain modified polyester fibers. S2. The modified polyester fiber is combined with polyester fiber and cotton fiber to form a fiber web; S3. The three layers of the fiber web are stacked and hot-pressed. The molten modified polyester fiber bonds the three layers of the fiber web together to form the cotton fiber-polyester fiber composite hot-melt wadding.

[0007] In one embodiment of this application, step S1 satisfies at least one of the following requirements (1)-(4): (1) The molar ratio of terephthalic acid, isophthalic acid and adipic acid is 1-4:5-8:0.5-1.5, preferably 2-4:5-7:0.8-1.5; (2) The molar ratio of diethylene glycol to ethylene glycol is 0.5-1.5:3-5, preferably 0.8-1.5:3.5-5; (3) The molar ratio of the dicarboxylic acid to the diol is 1.2-1.3:1, preferably 1.25-1.3:1; (4) The antimony trioxide accounts for 0.05%-0.07% of the total mass of the dicarboxylic acid and diol, preferably 0.06%-0.07%.

[0008] In one embodiment of this application, step S1 satisfies at least one of the following requirements (5)-(8): (5) During the esterification reaction, the temperature is 230℃-240℃, preferably 235℃-240℃; the pressure is 0.1MPa-0.15MPa, preferably 0.12MPa-0.15MPa; (6) During the polycondensation reaction, the temperature is 260℃-270℃, preferably 265℃-270℃; (7) The trimethyl phosphate accounts for 0.02%-0.04% of the total mass of the diacid and diol, preferably 0.03%-0.04%; (8) The vacuum drying temperature is 90℃-95℃, preferably 92℃-95℃; the vacuum drying time is 20h-30h, preferably 24h-30h; In one embodiment of this application, step S1 satisfies at least one of the following requirements (9)-(11): (9) In the melt spinning process, the temperature of the first zone is 115℃-120℃, preferably 117℃-120℃; the temperature of the second zone is 125℃-130℃, preferably 127℃-130℃; and the temperature of the third zone is 140℃-150℃, preferably 145℃-150℃. (10) During the melt spinning process, the spinning speed is 800m / min-1000m / min, preferably 850m / min-1000m / min; (11) During the stretching process, the temperature is 80℃-90℃, preferably 84℃-90℃; the speed is 600m / min-700m / min, preferably 650m / min-700m / min; and the stretching ratio is 2.5 times-3 times, preferably 2.7 times-3 times.

[0009] In one embodiment of this application, step S2 satisfies at least one of the following requirements (12)-(14): (12) In the fiber web, the modified polyester fiber has a mass percentage content of 10%-30%, preferably 15%-30%; (13) In the fiber web, the mass percentage of cotton fiber is 15%-50%, preferably 20%-50%; (14) The areal density of the fiber web is 50 g / m². 2 -80g / m 2 Preferably 60g / m 2 -80g / m 2 .

[0010] In one embodiment of this application, in step S2, the modified polyester fiber is pretreated and then made into a fiber web. The pretreatment includes: immersing the modified polyester fiber in an ethanol solution containing an aminosilane coupling agent and washing it.

[0011] In one embodiment of this application, step S2 satisfies at least one of the following requirements (15)-(17): (15) The mass ratio of the modified polyester fiber to the ethanol solution is 1:10-15, preferably 1:12-15; (16) The mass ratio of the aminosilane coupling agent to the modified polyester fiber is 0.08-0.15:100, preferably 0.09-0.15:100; (17) The soaking time is 2h-4h, preferably 2.5h-4h.

[0012] In one embodiment of this application, in step S3, the temperature of the hot pressing is 120℃-125℃, preferably 122℃-125℃; the duration of the hot pressing is 30s-45s, preferably 35s-45s.

[0013] This application also provides a cotton fiber-polyester fiber composite hot melt wadding sheet prepared according to the method described above.

[0014] This application also provides a quilt, which includes a cotton fiber-polyester fiber composite hot melt wadding as described above.

[0015] The beneficial effects of this application are: In this application, during the polyester synthesis process, modified monomers isophthalic acid, adipic acid, and diethylene glycol are added. Isophthalic acid, adipic acid, and diethylene glycol can disrupt the regularity of the polyester molecular chains, reduce crystal integrity, and lower the melting point of the polyester fibers, resulting in low-melting-point polyester fibers (i.e., modified polyester fibers). The modified polyester fibers are then combined with polyester fibers and cotton fibers to form a fiber web. During hot pressing, the modified polyester fibers melt, while the other fibers remain unmelted. The molten modified polyester fibers act as an adhesive, bonding the multiple layers of the fiber web together to form flocs. In other words, this application utilizes the low melting point of the modified polyester fibers, causing them to melt during hot pressing. The molten modified polyester fibers then bond the three layers of fiber web together to form flocs, thus avoiding the environmentally unfriendly problems caused by the use of adhesives in the preparation of synthetic flocs in existing technologies.

[0016] In this application, pretreatment introduces amino groups into the modified polyester fibers. These amino groups can form hydrogen bonds with the hydroxyl groups in the cotton fibers, improving the bonding force between the molten modified polyester fibers and the cotton fibers, thereby enhancing the strength of the wadding. Furthermore, the introduction of the polar amino groups improves the affinity between the molten modified polyester fibers and the cotton fibers, avoiding interfacial defects caused by poor affinity between the polyester and cotton fibers, thus further enhancing the strength of the wadding. Detailed Implementation

[0017] The technical solution of this application will be clearly and completely described below with reference to the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] One embodiment of this application provides a method for preparing a cotton fiber-polyester fiber composite hot-melt wadding sheet, comprising the following steps: S1. Mix diacid, diol and antimony trioxide to obtain a mixture, and carry out esterification reaction in a protective gas atmosphere, dehydrate, add trimethyl phosphate, and carry out polycondensation reaction to obtain a melt; Dicarboxylic acids include terephthalic acid, isophthalic acid, and adipic acid; diols include diethylene glycol and ethylene glycol. The melt is extruded, cooled, and sliced ​​to obtain modified polyester chips; Modified polyester chips are obtained by vacuum drying, melt spinning, and stretching. S2. Modified polyester fibers are combined with polyester fibers and cotton fibers to form a fiber web; S3. Stack the three-layer fiber web and hot-press it. The molten modified polyester fiber will bond the three-layer fiber web together to form a cotton fiber-polyester fiber composite hot melt flocculent sheet.

[0019] In this application, during the polyester synthesis process, modified monomers isophthalic acid, adipic acid, and diethylene glycol are added. Isophthalic acid, adipic acid, and diethylene glycol can disrupt the regularity of the polyester molecular chains, reduce crystal integrity, and lower the melting point of the polyester fibers, resulting in low-melting-point polyester fibers (i.e., modified polyester fibers). The modified polyester fibers are then combined with polyester fibers and cotton fibers to form a fiber web. During hot pressing, the modified polyester fibers melt, while the other fibers remain unmelted. The molten modified polyester fibers act as an adhesive, bonding the multiple layers of the fiber web together to form flocs. In other words, this application utilizes the low melting point of the modified polyester fibers, causing them to melt during hot pressing. The molten modified polyester fibers then bond the three layers of the fiber web together to form flocs, thus avoiding the environmentally unfriendly problems caused by the use of adhesives in the preparation of synthetic flocs in existing technologies.

[0020] In one embodiment of this application, in step S1, the molar ratio of diacid to diol is 1.2-1.3:1, preferably 1.25-1.3:1. The molar ratio of terephthalic acid, isophthalic acid, and adipic acid is 1-4:5-8:0.5-1.5, preferably 2-4:5-7:0.8-1.5. The molar ratio of diethylene glycol to ethylene glycol is 0.5-1.5:3-5, preferably 0.8-1.5:3.5-5. The molar ratio of diacid to diol is 1.2-1.3:1, preferably 1.25-1.3:1. Antimony trioxide accounts for 0.05%-0.07% of the total mass of diacid and diol, preferably 0.06%-0.07%, in other words, based on the total mass of diacid and diol, the mass of antimony trioxide is 0.05%-0.07%. During the esterification reaction, the temperature is 230℃-240℃, preferably 235℃-240℃; the pressure is 0.1MPa-0.15MPa, preferably 0.12MPa-0.15MPa. During the polycondensation reaction, the temperature is 260℃-270℃, preferably 265℃-270℃. Trimethyl phosphate accounts for 0.02%-0.04% of the total mass of the diacid and diol, preferably 0.03%-0.04%. In other words, based on the total mass of the diacid and diol, the mass of trimethyl phosphate is 0.02%-0.04%. The vacuum drying temperature is 90℃-95℃, preferably 92℃-95℃; the vacuum drying time is 20h-30h, preferably 24h-30h. During melt spinning, the temperature in zone one is 115℃-120℃, preferably 117℃-120℃; the temperature in zone two is 125℃-130℃, preferably 127℃-130℃; and the temperature in zone three is 140℃-150℃, preferably 145℃-150℃. The spinning speed is 800m / min-1000m / min, preferably 850m / min-1000m / min. During stretching, the temperature is 80℃-90℃, preferably 84℃-90℃; the speed is 600m / min-700m / min, preferably 650m / min-700m / min; and the stretching ratio is 2.5 times-3 times, preferably 2.7 times-3 times. Protective gases can include, for example, nitrogen, argon, and helium.

[0021] In one embodiment of this application, in step S2, the modified polyester fiber in the fiber web has a mass percentage content of 10%-30%, preferably 15%-30%; the cotton fiber has a mass percentage content of 15%-50%, preferably 20%-50%. The areal density of the fiber web is 50 g / m². 2 -80g / m 2 Preferably 60g / m 2 -80g / m 2 .

[0022] In one embodiment of this application, in step S3, the hot pressing temperature is 120℃-125℃, preferably 122℃-125℃; the hot pressing duration is 30s-45s, preferably 35s-45s.

[0023] In another embodiment of this application, in step S2, the modified polyester fibers are pretreated and then made into a fiber web. The pretreatment includes immersing the modified polyester fibers in an ethanol solution containing an aminosilane coupling agent and washing them. The mass ratio of the modified polyester fibers to the ethanol solution is 1:10-15, preferably 1:12-15. The mass ratio of the aminosilane coupling agent to the modified polyester fibers is 0.08-0.15:100, preferably 0.09-0.15:100. The immersion time is 2h-4h, preferably 2.5h-4h.

[0024] In this application, pretreatment introduces amino groups into the modified polyester fibers. These amino groups can form hydrogen bonds with the hydroxyl groups in the cotton fibers, improving the bonding force between the molten modified polyester fibers and the cotton fibers, thereby enhancing the strength of the wadding. Furthermore, the introduction of the polar amino groups improves the affinity between the molten modified polyester fibers and the cotton fibers, avoiding interfacial defects caused by poor affinity between the polyester and cotton fibers, thus further enhancing the strength of the wadding.

[0025] Another embodiment of this application provides a cotton fiber-polyester fiber composite hot melt wadding sheet prepared according to the method described above.

[0026] Another embodiment of this application also provides a quilt comprising a cotton fiber-polyester fiber composite hot melt wadding as described above.

[0027] Furthermore, the term "and / or" in this application is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0028] Example 1 S1. A mixture of diacid (diacid composed of terephthalic acid, isophthalic acid and adipic acid in a molar ratio of 1:8:1), diol (diol composed of diethylene glycol and ethylene glycol in a molar ratio of 1.5:3) and antimony trioxide, wherein the molar ratio of diacid to diol is 1.2:1 and antimony trioxide accounts for 0.07% of the total mass of diacid and diol, is obtained, and an esterification reaction is carried out in a nitrogen atmosphere at a temperature of 240℃ and a pressure of 0.1MPa; Dehydration, addition of trimethyl phosphate (0.02% of the total mass of the diacid and diol), and polycondensation reaction at 270°C to obtain a melt; The melt is extruded, cooled, and sliced ​​to obtain modified polyester chips; The modified polyester chips were vacuum dried at 95℃ for 20 hours. Subsequently, melt spinning was performed at a temperature of 120℃ in zone one, 130℃ in zone two, and 140℃ in zone three, with a spinning speed of 800m / min. Then, the modified polyester fiber was obtained by stretching it three times at a temperature of 90℃ and a speed of 600m / min. S2. Modified polyester fiber, polyester fiber and cotton fiber are mixed in a mass ratio of 10:40:50 to produce a fiber with an areal density of 50 g / m³. 2 Fiber web; S3. Stack the three-layer fiber web and hot-press it at 125°C for 30 seconds. The molten modified polyester fibers will bond the three-layer fiber web together to form flocculent sheets.

[0029] Example 2 S1. A mixture of diacid (diacid composed of terephthalic acid, isophthalic acid and adipic acid in a molar ratio of 4:5:1), diol (diol composed of diethylene glycol and ethylene glycol in a molar ratio of 0.5:5) and antimony trioxide, wherein the molar ratio of diacid to diol is 1.3:1 and antimony trioxide accounts for 0.05% of the total mass of diacid and diol, is obtained, and an esterification reaction is carried out in a nitrogen atmosphere at a temperature of 230°C and a pressure of 0.15 MPa; Dehydration, addition of trimethyl phosphate (0.04% of the total mass of the diacid and diol), and polycondensation reaction at 260°C to obtain a melt; The melt is extruded, cooled, and sliced ​​to obtain modified polyester chips; The modified polyester chips were vacuum dried at 90℃ for 30 hours. Subsequently, melt spinning was performed at a temperature of 115℃ in zone one, 125℃ in zone two, and 140℃ in zone three, with a spinning speed of 1000m / min. Then, the modified polyester fiber was obtained by stretching it 2.5 times at a temperature of 80℃ and a speed of 700m / min. S2. Modified polyester fiber, polyester fiber and cotton fiber are mixed in a mass ratio of 20:50:30 to produce a fiber with an areal density of 80 g / m³. 2 Fiber web; S3. Stack the three-layer fiber web and hot-press it at 120°C for 45 seconds. The molten modified polyester fibers will bond the three-layer fiber web together to form flocculent sheets.

[0030] Example 3 S1. A mixture of diacid (diacid composed of terephthalic acid, isophthalic acid and adipic acid in a molar ratio of 3:6.5:0.5), diol (diol composed of diethylene glycol and ethylene glycol in a molar ratio of 1:4) and antimony trioxide, wherein the molar ratio of diacid to diol is 1.25:1, and antimony trioxide accounts for 0.06% of the total mass of diacid and diol, is obtained, and an esterification reaction is carried out in a nitrogen atmosphere at a temperature of 235°C and a pressure of 0.12 MPa; Dehydration, addition of trimethyl phosphate (0.03% of the total mass of the dicarboxylic acid and diol), and polycondensation reaction at 265°C to obtain a melt; The melt is extruded, cooled, and sliced ​​to obtain modified polyester chips; The modified polyester chips were vacuum dried at 92℃ for 24 hours; Subsequently, melt spinning was performed at a temperature of 118℃ in zone one, 127℃ in zone two, and 145℃ in zone three, with a spinning speed of 900m / min. Then, the modified polyester fiber was obtained by stretching it 2.8 times at a temperature of 84℃ and a speed of 650m / min. S2. Modified polyester fiber, polyester fiber and cotton fiber are mixed in a mass ratio of 30:20:50 to produce a fiber with an areal density of 60 g / m³. 2 Fiber web; S3. Stack the three-layer fiber web and hot-press it at 122℃ for 35s. The molten modified polyester fiber will bond the three-layer fiber web together to form flocculent sheets.

[0031] Example 4 Except for the following conditions, flocculent sheets were prepared in the same manner as in Example 3: S2. Add 3-aminopropyltriethoxysilane (i.e., silane coupling agent KH-550) to anhydrous ethanol, stir, and obtain an ethanol solution; The modified polyester fiber was soaked in an ethanol solution for 2 hours. The mass ratio of the modified polyester fiber to the ethanol solution was 1:15, and the mass ratio of 3-aminopropyltriethoxysilane to the modified polyester fiber was 0.08:100. The modified polyester fiber was washed with anhydrous ethanol to obtain pretreated polyester fiber. Pretreated polyester fibers, polyester fibers, and cotton fibers were processed in a mass ratio of 30:20:50 to obtain a surface density of 60 g / m³. 2 Fiber web.

[0032] The difference between this embodiment and Embodiment 3 is that the modified polyester fiber is pretreated and then made into a fiber web.

[0033] Example 5 Except for the following conditions, flocculent sheets were prepared in the same manner as in Example 3: S2. Add 3-aminopropyltriethoxysilane (i.e., silane coupling agent KH-550) to anhydrous ethanol, stir, and obtain an ethanol solution; The modified polyester fiber was soaked in an ethanol solution for 4 hours. The mass ratio of the modified polyester fiber to the ethanol solution was 1:10, and the mass ratio of 3-aminopropyltriethoxysilane to the modified polyester fiber was 0.15:100. The modified polyester fiber was washed with anhydrous ethanol to obtain pretreated polyester fiber. Pretreated polyester fibers, polyester fibers, and cotton fibers were processed in a mass ratio of 30:20:50 to obtain a surface density of 60 g / m³. 2 Fiber web.

[0034] The difference between this embodiment and Embodiment 3 is that the modified polyester fiber is pretreated and then made into a fiber web.

[0035] test The melting points of the modified polyester chips in Examples 1-5 were tested using a melting point apparatus, and the results are shown in Table 1. The content of volatile organic compounds (total volatile organic compounds) in the flocs prepared in Examples 1-5 was tested according to GB / T 24281-2009 Determination of volatile organic compounds in textiles by gas chromatography-mass spectrometry. The results are shown in Table 1. The peel strength of the flocs prepared in Examples 1-5 was tested according to GB / T 2791-1995 Adhesives T Peel Strength Test Method Flexible Materials to Flexible Materials, and the results are shown in Table 1.

[0036] Table 1 Test Results

[0037] As shown in Table 1, no volatile organic compounds were detected in the flocs prepared in Examples 1-5. This result indicates that the flocs of this application are safe and environmentally friendly.

[0038] As shown in Table 1, the peel strength of Examples 4 and 5 is significantly improved compared to Example 3. This result indicates that pretreatment of the modified polyester fibers in this application can improve the strength of the wadding.

[0039] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A method for preparing a cotton fiber-polyester fiber composite hot-melt wadding sheet, characterized in that, The preparation method of the cotton fiber-polyester fiber composite hot melt wadding sheet includes the following steps: S1. Mix diacid, diol and antimony trioxide to obtain a mixture, and carry out esterification reaction in a protective gas atmosphere, dehydrate, add trimethyl phosphate, and carry out polycondensation reaction to obtain a melt; The dicarboxylic acid includes terephthalic acid, isophthalic acid and adipic acid, and the diol includes diethylene glycol and ethylene glycol; The melt is extruded, cooled, and sliced ​​to obtain modified polyester chips; The modified polyester chips were vacuum dried, then melt-spun and stretched to obtain modified polyester fibers. S2. The modified polyester fiber is combined with polyester fiber and cotton fiber to form a fiber web; S3. The three layers of the fiber web are stacked and hot-pressed. The molten modified polyester fiber bonds the three layers of the fiber web together to form the cotton fiber-polyester fiber composite hot-melt wadding.

2. The method for preparing the cotton fiber-polyester fiber composite hot-melt wadding sheet as described in claim 1, characterized in that, Step S1 satisfies at least one of the following requirements (1)-(4): (1) The molar ratio of terephthalic acid, isophthalic acid and adipic acid is 1-4:5-8:0.5-1.5; (2) The molar ratio of diethylene glycol to ethylene glycol is 0.5-1.5:3-5; (3) The molar ratio of the dicarboxylic acid to the diol is 1.2-1.3:1; (4) The antimony trioxide accounts for 0.05%-0.07% of the total mass of the dicarboxylic acid and diol.

3. The method for preparing the cotton fiber-polyester fiber composite hot-melt wadding sheet as described in claim 1, characterized in that, Step S1 satisfies at least one of the following requirements (5)-(8): (5) During the esterification reaction, the temperature is 230℃-240℃ and the pressure is 0.1MPa-0.15MPa; (6) The temperature during the polycondensation reaction is 260℃-270℃; (7) The trimethyl phosphate accounts for 0.02%-0.04% of the total mass of the diacid and diol; (8) The vacuum drying temperature is 90℃-95℃ and the vacuum drying time is 20h-30h.

4. The method for preparing the cotton fiber-polyester fiber composite hot-melt wadding sheet as described in claim 1, characterized in that, Step S1 satisfies at least one of the following requirements (9)-(11): (9) In the melt spinning process described in S1, the temperature of zone one is 115℃-120℃, the temperature of zone two is 125℃-130℃, and the temperature of zone three is 140℃-150℃; (10) During the melt spinning process described in step S1, the spinning speed is 800m / min-1000m / min; (11) During the stretching process described in step S1, the temperature is 80℃-90℃, the speed is 600m / min-700m / min, and the stretching ratio is 2.5 times-3 times.

5. The method for preparing the cotton fiber-polyester fiber composite hot-melt wadding sheet as described in claim 1, characterized in that, Step S2 satisfies at least one of the following requirements (12)-(14): (12) In the fiber web, the modified polyester fiber has a mass percentage content of 10%-30%; (13) In the fiber web, the mass percentage of cotton fiber is 15%-50%; (14) The areal density of the fiber web is 50 g / m². 2 -80g / m 2 .

6. The method for preparing the cotton fiber-polyester fiber composite hot-melt wadding sheet as described in claim 1, characterized in that, In step S2, the modified polyester fiber is pretreated and then made into a fiber web. The pretreatment includes immersing the modified polyester fiber in an ethanol solution containing an aminosilane coupling agent and washing it.

7. The method for preparing the cotton fiber-polyester fiber composite hot-melt wadding sheet as described in claim 6, characterized in that, Step S2 satisfies at least one of the following requirements (15)-(17): (15) The mass ratio of the modified polyester fiber to the ethanol solution is 1:10-15; (16) The mass ratio of the aminosilane coupling agent to the modified polyester fiber is 0.08-0.15:100; (17) The soaking time is 2h-4h.

8. The method for preparing the cotton fiber-polyester fiber composite hot-melt wadding sheet as described in claim 1, characterized in that, In step S3, the hot pressing temperature is 120℃-125℃, and the hot pressing duration is 30s-45s.

9. A cotton fiber-polyester fiber composite hot melt wadding sheet prepared according to any one of claims 1-8.

10. A quilt, characterized in that, The quilt comprises a cotton fiber-polyester fiber composite hot melt wadding as described in claim 9.

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