Down-like material, method for preparing down-like material from orange slice type composite fiber and textile

Abstract

The invention belongs to the technical field of textiles, and particularly discloses a down-like material, a method for preparing the down-like material through orange slice type composite fibers and a textile. The down-like material comprises a down core and curled down branches which are connected with the down core and radially dispersed along one side of the down core, and the length of the down branches is 10-50 mm; the down core is made of at least two polymers, the down branches are made of polymers, and the down-like material is made of at least two polymers. The down-like material is prepared by curling and cold and hot cutting orange slice type composite fibers to obtain first short fibers or first short fiber bundles and then splitting and drying, or by performing cold and hot cutting on the orange slice type composite fibers to obtain second short fibers or second short fiber bundles and then rubbing, splitting and drying the second short fibers or the second short fiber bundles. The down-like material disclosed by the invention is similar to natural down in structure, has good rebound resilience and can be used for filling clothes, quilt cores and pillow cores; and the preparation method is simple, the production efficiency is high, and continuous large-scale production can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of textiles, in particular to a down-like material, a method for preparing the down-like material by using orange segment type composite fibers, and textiles. Background Art

[0002] Down is the fluff that grows on the abdomen of geese and ducks and presents the shape of reed flowers. It is mainly composed of down core, feather shaft and ultra-fine short down. It is the natural fiber with the best thermal insulation performance known so far. However, natural down is scarce and expensive. It is of great significance to develop artificial down based on the appearance, feel, specific gravity, fluffiness, resilience, etc. of natural down. At present, the development of imitation down materials is mainly concentrated in two aspects: the development of imitation down fibers and imitation down fiber aggregates. Imitation down fibers are mainly developed through special-shaped fibers, composite fibers, or other new fiber forms to develop fiber materials with excellent thermal insulation performance. Imitation down fiber aggregates refer to the use of existing fibers, through the carding and web method, the filament bundle cutting method, the melt-blowing method and the fibrillation treatment method to process various fiber raw materials into imitation down materials with similar shapes and properties to natural down. Among them, patents CN116456853A, CN113897777A, CN113021722A, CN118683142A, CN118029009A, CN111705369A, etc. proposed different preparation methods of down-like fibers. Although hollow, curling, adding aerogel and other methods can achieve down-like and warm effects, there are still problems such as high fiber fineness affecting the warming effect, difficulty in industrial production, and environmentally unfriendly processing. Summary of the invention

[0003] In view of the shortcomings of the prior art mentioned above, the purpose of the present invention is to provide a down-like material, a method for preparing the down-like material through orange-peel-type composite fibers, and a textile. The down-like material adopts purely physical and green processing means, is developed through structural design based on fine denier fibers, is similar in structure to natural down, has good resilience, and its preparation method has high production efficiency and can achieve continuous large-scale production.

[0004] To achieve the above-mentioned purpose and other related purposes, the present invention provides a down-like material, comprising a down core, and down branches connected to the down core and radially dispersed and curled along one side of the down core, wherein the length of the down branches is 10 to 50 mm; the down core material comprises at least two polymers, the down branch material is a polymer, and the down-like material comprises at least two down branches made of polymer materials.

[0005] Furthermore, the fineness of the pile branches is 0.031D to 0.375D.

[0006] Furthermore, 80% to 90% of the down branches in the imitation down material have a curling rate of 10% to 30%.

[0007] Furthermore, in the straightened state, the velvet core has a width of 0.5 to 2 mm and a length of 1 to 30 mm.

[0008] Furthermore, the polymer is selected from at least two of polyester (PET), polyamide 6 (PA6), polypropylene (PP) or polyethylene (PE).

[0009] Furthermore, the velvet core is formed by curing after thermal bonding of orange-peg type composite fibers or orange-peg type composite fiber bundles, and the velvet branches are formed by dispersing after opening the curled orange-peg type composite fibers or orange-peg type composite fiber bundles, or the velvet branches are formed by dispersing after opening the orange-peg type composite fiber balls or orange-peg type composite fiber bundle balls, and the orange-peg type composite fiber balls or orange-peg type composite fiber bundle balls are made of orange-peg type composite fibers or orange-peg type composite fiber bundles after rubbing.

[0010] The present invention also provides a method for preparing a down-like material by using orange segment type composite fibers, comprising the following steps:

[0011] The pie-shaped composite fiber or the pie-shaped composite fiber bundle is made into a curled pie-shaped composite fiber or the pie-shaped composite fiber bundle; the curled pie-shaped composite fiber or the pie-shaped composite fiber bundle is cold-cut and hot-cut to obtain a first short fiber or a first short fiber bundle, wherein one end of the first short fiber or the first short fiber bundle is free and curled, and the other end is thermally bonded together;

[0012] The pie-shaped composite fiber or the pie-shaped composite fiber bundle is cold cut and hot cut to obtain the second short fiber or the second short fiber bundle, wherein one end of the second short fiber or the second short fiber bundle is free and the other end is thermally bonded together; the second short fiber or the second short fiber bundle is balled to obtain a short fiber ball or a short fiber bundle ball, wherein one end of the short fiber ball or the short fiber bundle ball is free and curled and the other end is thermally bonded together;

[0013] The first short fibers, the first short fiber bundles, the short fiber balls and / or the short fiber bundle balls are opened and dried to obtain the down-like material;

[0014] The pie-shaped composite fiber bundle is composed of a plurality of pie-shaped composite fibers.

[0015] Furthermore, the pie-shaped composite fiber is selected from at least one of polyester / polyamide 6 (PET / PA6) composite filaments, polypropylene / polyamide 6 (PP / PA6) composite filaments, and polypropylene / polyethylene (PE / PP) composite filaments.

[0016] Furthermore, the fineness of the pie-shaped composite fiber is 1D to 3D.

[0017] Furthermore, the fineness of the pie-shaped composite fiber bundle is 50D to 500D.

[0018] Furthermore, the curling rate of the curled pie-shaped composite fibers, pie-shaped composite fiber bundles, first short fibers and / or first short fiber bundles is 10% to 30%.

[0019] Furthermore, the curling rate of the imitation down material is 10% to 30%.

[0020] Furthermore, the length of the first short fibers, the first short fiber bundles, the second short fibers and / or the second short fiber bundles is 1 to 5 cm.

[0021] Furthermore, the cold cutting and hot cutting method is alternating cold and hot cutting.

[0022] Furthermore, the temperature of the cold knife used in cold cutting is the ambient temperature, and the temperature of the hot knife used in hot cutting is 150°C to 300°C.

[0023] Furthermore, the steam flash explosion method is used for fiber opening.

[0024] Furthermore, the conditions for opening the fibers by the steam flash explosion method include: an opening temperature of 150° C. to 220° C., an opening pressure of 0.5 MPa to 3 MPa, and an opening time of 30 s to 180 s.

[0025] Furthermore, the drying method is hot air drying, preferably dynamic drying under hot air.

[0026] Furthermore, the drying temperature is 40°C to 60°C.

[0027] The present invention also provides a textile product, comprising a filler, wherein the filler comprises the imitation down material as described above and / or the imitation down material made according to the method as described above.

[0028] As described above, the down-like material, the method for preparing the down-like material by using the orange segment type composite fiber and the textile of the present invention have the following beneficial effects:

[0029] The fiber form of the down-like material provided by the present invention is a fine denier / ultra-fine denier fiber aggregate, which has a larger specific surface area than conventional down-like fibers; at the same time, its aggregation mode with one end free and the other end fixed can better play the advantage of large specific surface area in storing still air, and also has better resilience, and is more similar to natural down in structure.

[0030] The down-like material provided by the present invention is prepared based on orange segment type composite fibers, and the preparation method thereof is a purely physical processing means, does not require any chemicals, is green and environmentally friendly, is simple to operate, has high production efficiency, and is easy to industrialize. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1Shown is a real picture of the imitation down material in an embodiment of the present invention.

[0032] Description of the accompanying drawings: velvet core 1, velvet branches 2. DETAILED DESCRIPTION

[0033] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0034] In the present invention, unless otherwise specified, the term "plurality" means two or more.

[0035] The character " / " indicates that the objects before and after are in an "and" or "or" relationship. For example, A / B means: A and B, or, A or B.

[0036] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0037] Please refer to Figure 1 In one embodiment of the present invention, there is provided a down-like material, comprising a down core 1, and down branches 2 connected to the down core 1 and radially dispersed and curled along one side of the down core 1, wherein the length of the down branches 2 is 10 to 50 mm; the down core 1 is made of at least two polymers, the down branches 2 are made of polymers, and the down-like material comprises at least two types of down branches 2 made of polymer materials. The fiber form of the down-like material provided by the present invention is a fine denier / ultra-fine denier fiber aggregate with a large specific surface area. The aggregate mode with one end free and the other end fixed can better play the advantage of a large specific surface area in storing still air, and also has better resilience, and is more similar to natural down in structure.

[0038] In some embodiments, the fineness of the down branches 2 is 0.031D-0.375D, and the fiber morphology of the imitation down material is a fine denier / ultra-fine denier fiber aggregate, which has a larger specific surface area than conventional imitation down fiber, which is beneficial to improving its warmth retention.

[0039] In some embodiments, 80% to 90% of the down branches 2 in the down-like material have a curling rate of 10% to 30%. Most of the down branches 2 in the down-like material of the present invention are curled, which can make it have better resilience and is more similar to natural down in structure.

[0040] In some embodiments, in the straightened state, the width of the down core 1 is 0.5 to 2 mm, and the length is 1 to 30 mm. The width and length of the down core 1 will affect the structural characteristics, structural stability and warmth retention of the down-like material. If the width and length of the down core 1 are too small, the structural stability of the down-like material will be poor, it will be easy to loosen, and the warmth retention will be poor; if the width and length of the down core 1 are too large, the down core 1 will be too large, resulting in the structure of the down-like material being different from that of natural down, and poor warmth retention.

[0041] In some embodiments, the polymer is selected from at least two of polyester (PET), polyamide 6 (PA6), polypropylene (PP) or polyethylene (PE), but is not limited thereto.

[0042] In some embodiments, the velvet core 1 is formed by curing after thermal bonding of orange-peel type composite fibers or orange-peel type composite fiber bundles, and the velvet branches 2 are formed by dispersion after the curled orange-peel type composite fibers or orange-peel type composite fiber bundles are opened, or the velvet branches 2 are formed by dispersion after the orange-peel type composite fiber balls or orange-peel type composite fiber bundle balls are opened, and the orange-peel type composite fiber balls or orange-peel type composite fiber bundle balls are made of orange-peel type composite fibers or orange-peel type composite fiber bundles after rubbing. There are many thermal bonding methods, such as hot melt bonding, hot rolling bonding and ultrasonic bonding, etc., the purpose of which is to melt and bond the fibers together by heating. In a specific embodiment, the thermal bonding method is hot cutting, that is, cutting with a hot knife, the temperature of the hot knife is greater than or equal to the melting point of the fiber, which will cause the fiber to soften and melt during the cutting process, thereby bonding the fibers together.

[0043] Another embodiment of the present invention provides a method for preparing a down-like material by using orange segment type composite fibers, comprising the following steps:

[0044] The pie-shaped composite fiber or the pie-shaped composite fiber bundle is made into a curled pie-shaped composite fiber or the pie-shaped composite fiber bundle; the curled pie-shaped composite fiber or the pie-shaped composite fiber bundle is cold-cut and hot-cut to obtain a first short fiber or a first short fiber bundle, wherein one end of the first short fiber or the first short fiber bundle is free and curled, and the other end is thermally bonded together;

[0045] The pie-shaped composite fiber or the pie-shaped composite fiber bundle is cold cut and hot cut to obtain the second short fiber or the second short fiber bundle, wherein one end of the second short fiber or the second short fiber bundle is free and the other end is thermally bonded together; the second short fiber or the second short fiber bundle is balled to obtain a short fiber ball or a short fiber bundle ball, wherein one end of the short fiber ball or the short fiber bundle ball is free and curled and the other end is thermally bonded together;

[0046] The first short fibers, the first short fiber bundles, the short fiber balls and / or the short fiber bundle balls are opened and dried to obtain the down-like material;

[0047] The pie-shaped composite fiber bundle is composed of a plurality of pie-shaped composite fibers.

[0048] The imitation down material provided by the present invention is prepared based on orange peel type composite fibers, wherein the fibers at the hot knife cut end are melted and bonded by heat to form a down core 1 of the imitation down material, and the free ends (i.e., the cold knife cut ends) of the first short fibers, the first short fiber bundles, the short fiber balls and / or the short fiber bundle balls are opened and dried to form down branches 2 of the imitation down material; the preparation method provided by the present invention is a purely physical processing method, does not require any chemicals, is green and environmentally friendly, is simple to operate, and is easy to industrialize.

[0049] In some embodiments, the pie-shaped composite fiber is selected from at least one of polyester / polyamide 6 (PET / PA6) composite filaments, polypropylene / polyamide 6 (PP / PA6) composite filaments, or polypropylene / polyethylene (PE / PP) composite filaments, but is not limited thereto.

[0050] In some embodiments, the pie-shaped composite fiber has 8, 16 or 32 pie segments, but is not limited thereto; the structure of the pie-shaped composite fiber may be, for example, solid pie segments, hollow pie segments, etc.

[0051] In some embodiments, the pie-shaped composite fiber has a fineness of 1D to 3D.

[0052] In some embodiments, the pie-shaped composite fiber bundle includes at least 2 pie-shaped composite fibers. Preferably, the pie-shaped composite fiber bundle is composed of 15 to 500 pie-shaped composite fibers. Multiple pie-shaped composite fibers can be laid flat and assembled into a bundle, or bundled together into a bundle.

[0053] In some embodiments, the fineness of the pie-shaped composite fiber bundle is 50D to 500D.

[0054] In some embodiments, the curled pie-shaped composite fibers, pie-shaped composite fiber bundles, first staple fibers and / or first staple fiber bundles have a curling rate of 10% to 30%, and can be curled using a crimping machine.

[0055] In some embodiments, the curl rate of the imitation down material is 10% to 30%.

[0056] In some embodiments, the length of the first staple fiber, the first staple fiber bundle, the second staple fiber and / or the second staple fiber bundle is 1 to 5 cm.

[0057] In some embodiments, the cold cutting and hot cutting methods are cold and hot alternating cutting, that is, cold cutting and hot cutting are performed in sequence, the orange segment type composite fiber or orange segment type composite fiber bundle is continuously fed into the cutting machine, and the cold knife and the hot knife are alternately cut to achieve continuous production. At the same time, by adjusting the feeding speed or the rotation speed of the cutting knife, the length of the short fiber / short fiber bundle can be controlled. Among them, the temperature of the cold knife used in cold cutting is, for example, the ambient temperature, and the temperature of the hot knife used in hot cutting is, for example, 150°C to 300°C.

[0058] In some embodiments, the fiber opening is performed by steam flash explosion. For example, the fiber opening equipment may be a steam flash explosion machine, and the fiber opening conditions include: the fiber opening temperature is 150° C. to 220° C., the fiber opening pressure is 0.5 MPa to 3 MPa, and the fiber opening time is 30 s to 180 s.

[0059] In some embodiments, the drying method is hot air drying, preferably dynamic drying under hot air, the drying temperature is, for example, 40° C. to 60° C., and the drying time is, for example, 0.5 to 1 minute.

[0060] Another embodiment of the present invention provides a textile, including a filler, wherein the filler includes the imitation down material as described above and / or the imitation down material made according to the method as described above. Exemplarily, the textile includes but is not limited to a quilt, a quilt core, a pillow, a pillow core, a garment, and the like.

[0061] The following specific examples are given to illustrate the present invention in detail. It should also be understood that the following examples are only used to specifically illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the above content of the present invention belong to the scope of protection of the present invention. The specific process parameters and the like in the following examples are also only examples within a suitable range, that is, those skilled in the art can make a selection within a suitable range according to the description herein, and are not limited to the specific values ​​​​exemplified below.

[0062] Example 1

[0063] This embodiment provides a down-like material, and the preparation method thereof is as follows:

[0064] 400D / 144F, 2 roots of 16 pieces of PET / PA6 orange-segment composite filaments with a fiber diameter of 1.2D were selected and assembled into bundles. They were processed into orange-segment composite filament bundles with a curling rate of 25% on a crimping machine, and continuously fed with alternating hot and cold cutting knives, wherein the cold knife temperature was the ambient temperature and the hot knife temperature was 220°C. By adjusting the feeding speed, a short fiber bundle with a length of 1 cm, one end bonded (hot knife cutting end), and the other end free (cold knife cutting end) and curled was obtained; then, the fiber was opened in a steam flash explosion machine at 180°C, 1.6MPa, and 120s to open the short fiber bundle into a fine denier curled fiber bundle with one end fixed and the other end free; finally, dynamic drying was carried out at 50°C for 0.5 minutes to obtain a bionic down material.

[0065] Example 2

[0066] This embodiment provides a down-like material, and the preparation method thereof is as follows:

[0067] 50D, 8 pieces of PP / PA6 orange-segment composite filaments with a fiber diameter of 1.5D were selected and assembled into bundles. They were processed into orange-segment composite filament bundles with a curling rate of 30% on a crimping machine, and continuously fed with alternating hot and cold cutting knives, wherein the cold knife temperature was ambient temperature and the hot knife temperature was 150°C. By adjusting the rotation speed of the cutting knife, a short fiber bundle with a length of 5 cm, one end bonded (hot knife cutting end), and the other end free (cold knife cutting end) and curled was obtained; then, the fiber was opened in a steam flash explosion machine at 220°C, 2.2MPa, and 180s to open the short fiber bundle into a fine denier curled fiber bundle with one end fixed and the other end free; finally, it was dynamically dried at 50°C for 0.5 minutes to obtain a bionic down material.

[0068] Example 3

[0069] This embodiment provides a down-like material, and the preparation method thereof is as follows:

[0070] A 500D, 32-piece PE / PP orange-segment composite filament with a diameter of 1.0D was selected and processed into an orange-segment composite filament with a curling rate of 10% on a crimping machine, and continuously fed with alternating hot and cold cutting knives, wherein the cold knife temperature was the ambient temperature and the hot knife temperature was 150°C. By adjusting the feeding speed, short fibers with a length of 3 cm, one end bonded (hot knife cutting end) and the other end free (cold knife cutting end) and curled were obtained; then, the fibers were opened in a steam flash explosion machine at 180°C, 3.0MPa, and 30s to open the short fibers into fine-denier curly fiber bundles with one end fixed and the other end free; finally, they were dynamically dried at 50°C for 0.5 minutes to obtain the bionic down material.

[0071] Example 4

[0072] This embodiment provides a down-like material, and the preparation method thereof is as follows:

[0073] A 500D, 32-piece PE / PP orange-segment composite filament with a diameter of 1.0D was selected, and alternating hot and cold cutting knives were continuously fed, wherein the cold knife temperature was the ambient temperature and the hot knife temperature was 300°C. By adjusting the feeding speed, short fibers with a length of 3 cm, one end bonded (hot knife cutting end) and the other end free (cold knife cutting end) were obtained; then, short fiber balls with one end bonded, the other end free and a curling rate of 20% were made under the action of a ball rolling machine; subsequently, the fibers were opened in a steam flash explosion machine at 150°C, 0.5MPa, and 150s to open the short fiber balls into fine denier curly fiber bundles with one end fixed and the other end free; finally, dynamic drying was carried out at 50°C for 0.5 minutes to obtain bionic down material.

[0074] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A down-like material, characterized in that: The imitation down material comprises a down core, and down branches connected to the down core and radially dispersed and curled along one side of the down core, wherein the down branches are 10 to 50 mm long; The down core material comprises at least two polymers, the down branches material is a polymer, and the imitation down material comprises at least two down branches made of polymer materials.

2. The down-like material according to claim 1, characterized in that: The fineness of the velvet branches is 0.031D to 0.375D; And / or, 80% to 90% of the down branches in the imitation down material have a curling rate of 10% to 30%; and / or, in the straightened state, the velvet core has a width of 0.5 to 2 mm and a length of 1 to 30 mm; And / or, the polymer is selected from at least two of polyester, polyamide 6, polypropylene or polyethylene.

3. The down-like material according to claim 1 or 2, characterized in that: The velvet core is formed by curing after thermal bonding of the pie-shaped composite fibers or the pie-shaped composite fiber bundles, the velvet branches are formed by dispersing the curled pie-shaped composite fibers or the pie-shaped composite fiber bundles after opening, or the velvet branches are formed by dispersing the pie-shaped composite fiber balls or the pie-shaped composite fiber bundle balls after opening, and the pie-shaped composite fiber balls or the pie-shaped composite fiber bundle balls are made of the pie-shaped composite fibers or the pie-shaped composite fiber bundles after rubbing.

4. A method for preparing a down-like material based on orange segment type composite fibers, characterized in that: The following steps are involved: The pie-shaped composite fiber or the pie-shaped composite fiber bundle is made into a curled pie-shaped composite fiber or the pie-shaped composite fiber bundle; the curled pie-shaped composite fiber or the pie-shaped composite fiber bundle is cold-cut and hot-cut to obtain a first short fiber or a first short fiber bundle, wherein one end of the first short fiber or the first short fiber bundle is free and curled, and the other end is thermally bonded together; The pie-shaped composite fiber or the pie-shaped composite fiber bundle is cold cut and hot cut to obtain the second short fiber or the second short fiber bundle, wherein one end of the second short fiber or the second short fiber bundle is free and the other end is thermally bonded together; the second short fiber or the second short fiber bundle is balled to obtain a short fiber ball or a short fiber bundle ball, wherein one end of the short fiber ball or the short fiber bundle ball is free and curled and the other end is thermally bonded together; The first short fibers, the first short fiber bundles, the short fiber balls and / or the short fiber bundle balls are opened and dried to obtain the down-like material; The pie-shaped composite fiber bundle is composed of a plurality of pie-shaped composite fibers.

5. The method for preparing down-like material based on pie-shaped composite fiber according to claim 4, characterized in that: The pie-shaped composite fiber is selected from at least one of polyester / polyamide 6 composite filaments, polypropylene / polyamide 6 composite filaments, or polypropylene / polyethylene composite filaments; And / or, the fineness of the pie-shaped composite fiber is 1D to 3D; And / or, the fineness of the pie-shaped composite fiber bundle is 50D to 500D.

6. The method for preparing down-like material based on pie-shaped composite fibers according to claim 4 or 5, characterized in that: The curling rate of the curled pie-shaped composite fiber, pie-shaped composite fiber bundle, first short fiber and / or first short fiber bundle is 10% to 30%; And / or, the curl rate of the imitation down material is 10% to 30%; And / or, the length of the first short fibers, the first short fiber bundle, the second short fibers and / or the second short fiber bundle is 1 to 5 cm.

7. The method for preparing down-like material based on pie-shaped composite fibers according to claim 4 or 5, characterized in that: The cold cutting and hot cutting methods are cold and hot cutting alternately; And / or, the temperature of the cold knife used in cold cutting is the ambient temperature, and the temperature of the hot knife used in hot cutting is 150°C to 300°C.

8. The method for preparing down-like material based on pie-shaped composite fibers according to claim 4 or 5, characterized in that: The steam flash explosion method is used for fiber opening; and / or, the drying method is hot air drying; And / or, the drying temperature is 40°C to 60°C.

9. The method for preparing down-like material based on pie-shaped composite fibers according to claim 8, characterized in that: The conditions for opening fibers by steam flash explosion method include: opening temperature of 150°C to 220°C, opening pressure of 0.5MPa to 3MPa, and opening time of 30s to 180s.

10. A textile product, characterized in that: The invention comprises a filler, wherein the filler comprises the imitation down material according to any one of claims 1 to 3 and / or the imitation down material prepared by the method according to any one of claims 4 to 9.

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