Bionic velvet flower, method for preparing bionic velvet flower based on orange petal-shaped composite fiber and textile

Abstract

The invention belongs to the technical field of textiles, and particularly discloses a bionic velvet flower, a method for preparing the bionic velvet flower based on orange petal-shaped composite fibers and a textile. The bionic velvet flower comprises a velvet core and velvet branches which are connected with the velvet core and are radially dispersed along the two sides of the velvet core, and the length of the velvet branches is 10-30mm; the velvet core is made of at least two polymers, the velvet branches are made of polymers, and the bionic velvet flower is made of at least two polymers. The bionic velvet is prepared by the following steps: performing heat setting on orange petal-shaped composite fibers, heating, bonding, cutting to prepare short fiber bundles or short fibers with two free ends and a single bonding point in the middle, splitting, and performing spray drying. The structure of the bionic velvet flower is similar to that of natural velvet flower, and the bionic velvet flower 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 bionic velvet cluster, a method for preparing the bionic velvet cluster based on orange segment-shaped composite fibers, and textiles. Background Art

[0002] In recent years, with the technological innovation of textile materials and the growing demand of consumers for environmentally friendly and high-performance materials, down-like filling fibers have received widespread attention as a high-quality down substitute. This type of material has been widely used in clothing, home textiles, outdoor products and other fields due to its good fluffiness, lightness and thermal insulation performance. Down-like filling fibers can not only avoid the use of animal down, but also achieve certain properties that exceed natural down in terms of characteristics. However, the existing preparation process of down-like filling fibers still has many limitations, which restricts its further popularization in the market. At present, the development of down-like materials is mainly concentrated in two aspects: the development of down-like fibers and down-like fiber aggregates. Down-like fibers are mainly developed through special-shaped fibers, composite fibers, or other new fiber forms to develop fiber materials with excellent thermal insulation properties. Down-like fiber aggregates refer to the use of existing fibers to process various fiber raw materials into down-like materials with similar morphology and performance to natural down through carding, filament bundle cutting, melt-blowing and fibrillation treatment. 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 bionic velvet cluster, a method for preparing bionic velvet clusters based on orange-peel-shaped composite fibers, and textiles. The bionic velvet clusters are produced using purely physical and green processing methods and are developed through structural design based on fine-denier fibers. The structure is similar to that of natural velvet clusters, and the preparation method thereof has high production efficiency and can realize continuous large-scale production.

[0004] To achieve the above-mentioned purpose and other related purposes, the present invention provides a bionic velvet cluster, including a velvet core, and velvet branches connected to the velvet core and radially dispersed along both sides of the velvet core, wherein the length of the velvet branches is 10 to 30 mm; the velvet core material includes at least two polymers, the velvet branch material is a polymer, and the bionic velvet cluster includes at least two types of polymer materials.

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

[0006] Furthermore, in the straightened state, the velvet core has a width of 0.5 to 5 mm and a length of 1 to 30 mm.

[0007] Furthermore, the polymer is selected from at least two of polyester (PET), polyamide 6 (PA6), polypropylene (PP) or polyethylene (PE).

[0008] Furthermore, the velvet core is formed by curing the pie-shaped composite fibers or pie-shaped composite fiber bundles after thermal bonding, and the velvet branches are formed by dispersing the pie-shaped composite fibers or pie-shaped composite fiber bundles after fiber opening.

[0009] The present invention also provides a method for preparing bionic velvet based on orange-segment-shaped composite fibers, comprising the following steps:

[0010] (1) heat setting the orange-peel-shaped composite fiber;

[0011] (2) heating a local area of ​​the pie-shaped composite fiber bundle or the pie-shaped composite fiber after heat setting so that the fibers in the local area are thermally bonded to each other, and then solidified to form a single bonding point or a plurality of bonding points spaced apart along the length direction of the pie-shaped composite fiber, and cutting from both sides of the bonding point to form a short fiber bundle or short fiber with free ends and a single bonding point in the middle;

[0012] The pie-shaped composite fiber bundle is composed of a plurality of heat-set pie-shaped composite fibers.

[0013] (3) The short fiber bundles or short fibers are opened and spray-dried to obtain bionic velvet.

[0014] Furthermore, the orange-segment-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.

[0015] Furthermore, the fineness of the pie-shaped composite fiber is 1D to 3D.

[0016] Furthermore, the fineness of the pie-shaped composite fiber bundle is 50D to 500D.

[0017] Furthermore, in the step (1), the heat setting temperature is 130° C. to 180° C., and the heat setting time is 0.5 min to 3 min.

[0018] Furthermore, in step (2), the spacing between the multiple bonding points is 20 to 60 mm.

[0019] Furthermore, in step (2), the length of the short fiber bundle or the short fiber is 20 to 60 mm.

[0020] Furthermore, in step (2), the plurality of bonding points are spaced equidistantly from each other.

[0021] Furthermore, in the step (2), ultrasonic welding is used to heat the local area of ​​the pie-shaped composite fiber bundle or the pie-shaped composite fiber after heat setting, so that the fibers in the local area are thermally bonded to each other.

[0022] Furthermore, the ultrasonic welding frequency is 20 kHz to 40 kHz, and the ultrasonic welding pressure is 0.2 MPa to 0.5 MPa.

[0023] Furthermore, in the step (3), air flow separation method is used for fiber opening.

[0024] Furthermore, the conditions for fiber opening by air flow separation method include: fiber opening flow rate of 60m / s to 200m / s, fiber opening pressure of 0.2MPa to 1.0MPa, and fiber opening time of 30s to 180s.

[0025] Furthermore, in step (3), the spray drying method is drying under spraying and hot air, preferably tumble drying under spraying and hot air.

[0026] Furthermore, in the step (3), the spray liquid used in the spray drying contains an auxiliary agent, and the auxiliary agent includes an antistatic agent.

[0027] Furthermore, in step (3), the drying temperature is 50°C to 185°C.

[0028] The present invention also provides a textile, comprising a filler, wherein the filler comprises the bionic pile as described above and / or the bionic pile made according to the method as described above.

[0029] As described above, the bionic velvet, the method for preparing the bionic velvet based on the orange segment-shaped composite fiber and the textile of the present invention have the following beneficial effects:

[0030] The fiber morphology of the bionic down provided by the present invention is a fluffy fiber aggregate with a micron structure, which has a larger specific surface area than conventional down-like fibers; at the same time, its assembly mode with free ends and fixed middle points can better play the advantage of large specific surface area in storing still air, and is more similar to natural down in structure.

[0031] The bionic velvet provided by the invention is prepared based on orange-segment-shaped composite fibers. The preparation method is a purely physical processing method, 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

[0032] Figure 1 Shown is a schematic diagram of the preparation process of the bionic velvet flowers in an embodiment of the present invention.

[0033] Description of the reference numerals: pie-shaped composite fiber 1, bonding point 2, short fiber 3. DETAILED DESCRIPTION

[0034] 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.

[0035] In the present invention, unless otherwise specified, the term "plurality" means two or more.

[0036] 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.

[0037] 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.

[0038] One embodiment of the present invention provides a bionic down cluster, including a down core, and down branches connected to the down core and radially dispersed along both sides of the down core, the down branches are 10 to 30 mm long; the down core material includes at least two polymers, the down branches are polymers, and the bionic down cluster includes at least two polymer down branches. The fiber form of the bionic down cluster provided by the present invention is a fluffy fiber aggregate with a large specific surface area. The aggregation mode with free ends and fixed middle points can better play the advantage of large specific surface area in storing still air, and is more similar to natural down in structure.

[0039] In some embodiments, the fineness of the velvet branches is 0.031D to 0.375D, and the fiber morphology of the bionic velvet clusters is a fluffy fiber aggregate with a micron structure, which has a larger specific surface area than conventional bionic velvet cluster fibers, thereby improving its warmth retention.

[0040] In some embodiments, in the straightened state, the width of the down core is 0.5 to 5 mm, and the length is 1 to 30 mm. The width and length of the down core will affect the structural characteristics, structural stability and warmth retention of the bionic down clusters. If the width and length of the down core are too small, the bionic down clusters will have poor structural stability, be easily loose, and have poor warmth retention; if the width and length of the down core are too large, the down core will be too large, resulting in a bionic down cluster structure that is not similar to 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 is formed by curing after thermal bonding of the pie-shaped composite fiber or the pie-shaped composite fiber bundle, and the velvet branches are formed by dispersing the pie-shaped composite fiber or the pie-shaped composite fiber bundle after fiber opening. 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 ultrasonic welding. Ultrasonic welding uses ultrasonic welding equipment to convert low-frequency current into high-frequency current using a high-frequency converter, which is then converted into high-frequency mechanical vibration (ultrasound) through an electrical energy-mechanical energy converter, and then transmitted to the fiber, so that the molecular movement inside the fiber is intensified and heat energy is released, causing the fiber to soften and melt, thereby bonding the fibers.

[0043] Please refer to Figure 1 Another embodiment of the present invention provides a method for preparing the above-mentioned bionic velvet based on orange-segment-shaped composite fibers, comprising the following steps:

[0044] (1) performing heat setting treatment on the pie-shaped composite fiber 1;

[0045] (2) heating a local area of ​​the pie-shaped composite fiber bundle or the pie-shaped composite fiber 1 after heat setting so that the fibers in the local area are thermally bonded to each other, and then solidified to form a single bonding point 2 or a plurality of bonding points 2 spaced apart along the length direction of the pie-shaped composite fiber 1, and cutting from both sides of the bonding point 2 to form a short fiber bundle or short fiber 3 with free ends and a single bonding point 2 in the middle;

[0046] The pie-shaped composite fiber bundle is composed of a plurality of heat-set pie-shaped composite fibers 1;

[0047] (3) The short fiber bundle or the short fiber 3 is opened and spray-dried to obtain bionic velvet.

[0048] The bionic velvet provided by the present invention is prepared based on orange-segment-shaped composite fibers, wherein the bonding points 2 form the velvet core of the bionic velvet, and the two free ends of the short fiber bundle or the short fiber 3 are opened and spray-dried to form the velvet branches of the bionic velvet; 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 orange-peel 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 pieces, but is not limited thereto; the structure of the pie-shaped composite fiber may be, for example, solid pieces, hollow pieces, 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. A plurality of heat-set 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, in step (1), the heat setting temperature is 130° C. to 180° C., and the heat setting time is 0.5 min to 3 min.

[0055] In some embodiments, in the step (2), the spacing between the multiple bonding points 2 is 20 to 60 mm, and the multiple bonding points 2 are preferably equidistantly spaced. In this case, the short fiber bundles or short fibers 3 can be cut from the center between two adjacent bonding points 2 to make the lengths of the short fiber bundles or short fibers 3 equal, and the lengths of the velvet branches on both sides of the bionic velvet core are also equal; the length of the short fiber bundles or short fibers 3 is 20 to 60 mm. Preferably, the distances between the two ends of the short fiber bundles or short fibers 3 and the middle bonding point 2 are equal, that is, the lengths of the velvet branches on both sides of the velvet core are equal.

[0056] In some embodiments, in step (2), ultrasonic welding is used to heat the local area of ​​the pie-shaped composite fiber bundle or the pie-shaped composite fiber after heat setting treatment, so that the fibers in the local area are thermally bonded to each other. The welding point formed after ultrasonic welding is the bonding point 2, and the width and length of the welding point are the width and length of the bionic velvet core. Exemplarily, the ultrasonic welding frequency is 20kHz to 40kHz, and the ultrasonic welding pressure is 0.2MPa to 0.5MPa; ultrasonic welding can use regular spot welding to make the spacing between two adjacent bonding points 2 equal or have a certain change pattern.

[0057] In some embodiments, in step (3), the fiber opening is performed by airflow separation. Exemplarily, the fiber opening equipment may be a high-speed airflow separator, and the fiber opening conditions include: a fiber opening flow rate of 60 m / s to 200 m / s, a fiber opening pressure of 0.2 MPa to 1.0 MPa, and a fiber opening time of 30 s to 180 s.

[0058] In some embodiments, in step (3), the spray drying method is drying under spray and hot air, preferably tumble drying under spray and hot air, the drying temperature is, for example, 50°C to 185°C, and the drying time is, for example, 0.5 to 1 minute.

[0059] In some embodiments, in step (3), the spray liquid used for spray drying includes water and an auxiliary agent, wherein the water is, for example, deionized water, purified water, pure water, ultrapure water, tap water, etc., and the mass concentration of the auxiliary agent in the spray liquid is, for example, 0.1% to 5%, and the auxiliary agent includes, but is not limited to, an antistatic agent, etc., and the mass concentration of the antistatic agent in the spray liquid is, for example, 0.1% to 5%, and the antistatic agent includes, but is not limited to, a cationic surfactant, etc., and the cationic surfactant is preferably a quaternary ammonium salt compound, such as didodecyl dimethyl ammonium chloride, didodecyl dimethyl ammonium bromide, etc., and the amount (i.e., mass) of the spray liquid is, for example, 0.1% to 2.0% of the fiber mass.

[0060] Another embodiment of the present invention further provides a textile, including a filler, wherein the filler includes the bionic velvet as described above and / or the bionic velvet 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 bionic velvet flower, and the preparation method thereof is as follows:

[0064] Raw material selection and heat setting: 2 16-piece PET / PA6 orange-segment composite filaments with a fiber diameter of 1.2D were selected. They were set at 130°C for 3 minutes and assembled into bundles.

[0065] Ultrasonic welding: Use ultrasonic welding equipment to regularly spot weld the fiber bundles, with a welding frequency of 30kHz, a welding pressure of 0.2MPa, and a welding interval of 20mm. After welding, cut off from the middle of the two welding points to form a short fiber bundle with a length of 20mm.

[0066] Fiber opening and drying: The short fiber bundles are placed in a high-speed airflow separator, and the airflow velocity is set to 100 m / s, the fiber opening pressure is set to 0.8 MPa, and the fiber opening time is set to 60 seconds. The fibers after fiber opening are then dried in a rotary drying device at a temperature of 120°C for 0.5 minutes, and didodecyl dimethyl ammonium bromide is sprayed and added at a dosage of 0.5% of the fiber weight. Finally, bionic down with good fluffiness and a structure similar to natural down is obtained.

[0067] Example 2

[0068] This embodiment provides a bionic velvet flower, and the preparation method thereof is as follows:

[0069] Raw material selection and heat setting: 8 pieces of PP / PA6 orange-segment composite filaments with a fiber diameter of 1.5D were selected. They were set at 160°C for 1 minute and assembled into bundles.

[0070] Ultrasonic welding: Use ultrasonic welding equipment to regularly spot weld the fiber bundles, with a welding frequency of 40kHz, a welding pressure of 0.4MPa, and a welding interval of 30mm. After welding, cut off the middle of two adjacent welding points to form a short fiber bundle with a length of 30mm.

[0071] Fiber opening and drying: The short fiber bundles are placed in a high-speed airflow separator, and the airflow velocity is set to 120 m / s, the fiber opening pressure is set to 0.2 MPa, and the fiber opening time is set to 90 seconds. The fibers after fiber opening are then dried in a rotary drying device at a temperature of 185°C for 0.5 minutes, and didodecyl dimethyl ammonium bromide is sprayed and added at a dosage of 1.0% of the fiber weight. Finally, bionic down with good fluffiness and a structure similar to natural down is obtained.

[0072] Example 3

[0073] This embodiment provides a bionic velvet flower, and the preparation method thereof is as follows:

[0074] Raw material selection and heat setting: 1 32-piece PE / PP orange-segment composite filament with a diameter of 1.0D was selected.

[0075] Ultrasonic welding: Fixing at 180°C for 0.5 minutes. Use ultrasonic welding equipment to regularly spot weld the filaments, with a welding frequency of 20kHz, a welding pressure of 0.5MPa, and a welding interval of 60mm. After welding, cut from the middle of the two welding points to form short fibers with a length of 60mm.

[0076] Fiber opening and drying: The short fibers are placed in a high-speed airflow separator, and the airflow velocity is set to 200 m / s, the fiber opening pressure is set to 1.0 MPa, and the fiber opening time is set to 30 seconds. The fibers after fiber opening are then dried in a rotary drying device at a temperature of 120°C for 0.5 minutes, and didodecyl dimethyl ammonium bromide is sprayed and added at a dosage of 2.0% of the fiber weight. Finally, bionic down with good fluffiness and a structure similar to natural down is obtained.

[0077] 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 concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A bionic velvet, characterized in that: The bionic velvet flower comprises a velvet core and velvet branches connected to the velvet core and radially dispersed along both sides of the velvet core, wherein the length of the velvet branches is 10 to 30 mm; The material of the velvet core includes at least two polymers, the material of the velvet branches is a polymer, and the bionic velvet flowers include at least two velvet branches made of polymer materials.

2. The bionic velvet according to claim 1, characterized in that: The fineness of the velvet branches is 0.031D to 0.375D; and / or, in the straightened state, the velvet core has a width of 0.5 to 5 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 bionic velvet according to claim 1 or 2, characterized in that: The velvet core is formed by curing the pie-shaped composite fibers or pie-shaped composite fiber bundles after thermal bonding, and the velvet branches are formed by dispersing the pie-shaped composite fibers or pie-shaped composite fiber bundles after fiber opening.

4. A method for preparing bionic velvet based on orange-segment shaped composite fibers, characterized in that: The following steps are involved: (1) heat setting the orange-peel-shaped composite fiber; (2) heating a local area of ​​the pie-shaped composite fiber bundle or the pie-shaped composite fiber after heat setting so that the fibers in the local area are thermally bonded to each other, and then solidified to form a single bonding point or a plurality of bonding points spaced apart along the length direction of the pie-shaped composite fiber, and cutting from both sides of the bonding point to form a short fiber bundle or short fiber with free ends and a single bonding point in the middle; The pie-shaped composite fiber bundle is composed of a plurality of heat-set pie-shaped composite fibers. (3) The short fiber bundles or short fibers are opened and spray-dried to obtain bionic velvet.

5. The method for preparing bionic velvet based on orange-segment shaped composite fibers according to claim 4, characterized in that: The orange-segment-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 bionic velvet based on orange-segment shaped composite fibers according to claim 4 or 5, characterized in that: In the step (1), the heat setting temperature is 130°C to 180°C, and the heat setting time is 0.5min to 3min; And / or, in step (2), the spacing between the plurality of bonding points is 20 to 60 mm; and / or, in step (2), the length of the short fiber bundle or short fiber is 20 to 60 mm; And / or, in step (2), the plurality of bonding points are spaced equidistantly from each other.

7. The method for preparing bionic velvet based on orange-segment shaped composite fibers according to claim 6, characterized in that: In the step (2), ultrasonic welding is used to heat a local area of ​​the pie-shaped composite fiber bundle or the pie-shaped composite fiber after heat setting, so that the fibers in the local area are thermally bonded to each other; And / or, in the step (3), air flow separation method is used for fiber opening.

8. The method for preparing bionic velvet based on orange-segment shaped composite fibers according to claim 7, characterized in that: The ultrasonic welding frequency is 20kHz~40kHz, and the ultrasonic welding pressure is 0.2MPa~0.5MPa; And / or, the conditions for fiber opening by air flow separation method include: fiber opening flow rate of 60m / s to 200m / s, fiber opening pressure of 0.2MPa to 1.0MPa, and fiber opening time of 30s to 180s.

9. The method for preparing bionic velvet based on orange-segment shaped composite fibers according to claim 4, characterized in that: In the step (3), the spray drying method is to dry under spraying and hot air; And / or, in step (3), the spray liquid used in the spray drying contains an auxiliary agent; And / or, in step (3), the drying temperature is 50°C to 185°C.

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

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