Multifunctional multilayer structure composite flocculus and preparation method thereof

Abstract

The invention discloses a multifunctional multilayer structure composite flocculus and a preparation method thereof, and relates to the field of spinning. A multifunctional composite flocculus with a multi-layer structure comprises a surface flocculus located on the outer side and a middle flocculus located in the middle. The surface flocculus is composed of superfine fibers and is subjected to glue spraying and lustring to serve as a cover, and the fiber fineness is 0.5-1.5 D; the middle-layer flocculus is made of coarse denier three-dimensional crimped hollow fibers, and the fiber fineness is 5D-8D. The air permeability of the multifunctional multilayer structure composite flocculus reaches up to 1100 mm / s, the filling power reaches up to 75 cm / m < 3 >, and the recovery rate reaches 97% or above.

Description

Technical Field

[0001] The invention relates to the field of textiles, in particular to a composite flake. Background Art

[0002] At present, the commonly used thermal insulation materials on the market mainly include down, wool and cashmere, cotton, hollow / porous fibers, and ultrafine fibers. Among them, down, wool and cashmere are natural fibers with good thermal insulation but are expensive. Among them, hollow / porous fibers and ultrafine fibers have a certain thermal insulation effect, but the thermal insulation and comfort performance need to be further improved. The existing thermal insulation flakes have a relatively simple structure, which has certain limitations on the performance of the various properties of the flakes. Summary of the invention

[0003] The object of the present invention is to provide a multifunctional multi-layer composite flake to solve the above problems.

[0004] The present invention also aims to provide a method for preparing a multifunctional multilayer composite flake to prepare the multifunctional multilayer composite flake.

[0005] A multifunctional multi-layer composite flake, characterized in that it comprises a surface flake located on the outside and a middle flake located in the middle; the surface flake is composed of ultrafine fibers and is glue-sprayed and hot-polished to make a cover, and the fiber fineness is 0.5D-1.5D; the middle flake is made of coarse denier three-dimensional curled hollow fibers, and the fiber fineness is 5D-8D.

[0006] Preferably, the fibers of the surface flakes are one or more of superfine polyester fibers, lyocell fibers, functional viscose fibers, nylon fibers, and protein-based polyvinyl alcohol fibers.

[0007] Preferably, the fibers of the middle layer flakes are one or a combination of functional polyester fibers, acrylic fibers, lyocell fibers, functional viscose fibers, nylon fibers, and protein-based polyvinyl alcohol fibers.

[0008] Preferably, it also includes a sub-middle layer flakes sandwiched between the surface layer flakes and the middle layer flakes, the sub-middle layer flakes are made of a combination of three-dimensional curled hollow fibers and two-dimensional curled fibers, and the fiber fineness is 2D-5D.

[0009] More preferably, the fiber of the secondary middle layer flakes is one or a combination of functional polyester fiber, acrylic fiber, lyocell fiber, functional viscose fiber, nylon fiber, protein polyvinyl alcohol fiber and the like.

[0010] Preferably, the fibers of each flake layer contain low-melting-point fibers, and the flake layers are thermally melted and connected by the low-melting-point fibers.

[0011] Preferably, the amount of adhesive sprayed on the surface of the surface floccules is 5-20 g / m 2 .

[0012] As a preferred preparation method of a multifunctional multilayer structure composite flake, it is characterized by comprising the following steps: 0.8D*38mm silicon-free ultrafine polyester fiber, 1.2D*38mm lyocell fiber, and 2D*51mm low-melting point fiber are mixed and opened evenly, and then combed to obtain an upper surface flake and a lower surface flake; 3D*64mm three-dimensional curled hollow antibacterial polyester fiber, 2D*38mm two-dimensional moisture absorption and perspiration polyester fiber, 3D*51mm two-dimensional special-shaped acrylic fiber, and 2D*51mm low The melting point fiber is mixed and opened evenly, and then combed to obtain the sub-middle layer flakes; 6D*64 three-dimensional curled hollow far-infrared polyester fiber, 3D*64 two-dimensional silicon-free polyester fiber, and 2D*51mm low melting point fiber are mixed and opened evenly, and then combed to obtain the middle layer flakes; the flake structure has 5 layers, which are the lower surface flakes, the sub-middle layer flakes, the middle layer flakes, the sub-middle layer flakes, and the upper surface layer flakes in order from bottom to top. Finally, the five layers of flakes are gathered and superimposed to form a multifunctional multi-layer composite flake, which is 20g / m 2 After spraying glue, it is shaped in an oven, ironed, and then trimmed and packaged.

[0013] As another preferred method for preparing a multifunctional multilayer structure composite flake, it is characterized in that it includes the following steps: 1.2D*38mm ultrafine special-shaped polyester fiber, 1.0D*38mm milk protein viscose fiber, and 2D*51mm low-melting point fiber are mixed and opened evenly, and then combed to obtain an upper surface flake and a lower surface flake; 3D*64mm three-dimensional curled hollow deodorizing polyester fiber, 2.5D*51mm two-dimensional energy storage heating polyester fiber, and 2D*51mm low-melting point fiber are mixed and opened After being evenly mixed, the sub-middle layer flakes are obtained by combing; 7D*64 three-dimensional curled hexagonal high hollow polyester fiber, 5D*64 two-dimensional formaldehyde-free polyester fiber, and 2D*51mm low melting point fiber are mixed and loosened evenly, and then the middle layer flakes are obtained by combing; the flake structure has 6 layers, which are lower surface flakes, sub-middle layer flakes, middle layer flakes, middle layer flakes, sub-middle layer flakes, and upper surface layer flakes in order from bottom to top. Finally, the six layers of flakes are gathered and superimposed to form a multifunctional multi-layer composite flake, which is 15g / m 2 After spraying glue, it is shaped in an oven, ironed, and then trimmed and packaged.

[0014] As another preferred preparation method of multifunctional multilayer structure composite floccules, it is characterized by comprising the following steps: 1.0D*38mm ultrafine special-shaped nylon fiber, 0.8D*38mm moisture wicking polyester fiber, and 2D*51mm low-melting point fiber are mixed and opened evenly, and then combed to obtain upper surface floccules and lower surface floccules; 3D*64 three-dimensional curled straight acrylic fiber, 2.5D*64 two-dimensional antibacterial and anti-mite polyester fiber, and 2D*51mm low-melting point fiber are mixed and opened evenly, and then combed to obtain middle layer floccules; the floccules structure has 3 layers, which are lower surface floccules, middle layer floccules, and upper surface floccules in order from bottom to top. Finally, the three layers of floccules are converged and superimposed to form a multifunctional multilayer structure composite floccules, which is 25g / m 2 After spraying glue, it is shaped in an oven, ironed, and then trimmed and packaged.

[0015] Beneficial effects:

[0016] The multifunctional multi-layer composite flakes of the present invention are designed with multi-layer and different structures by using fiber materials of different coarseness and fineness. The middle layer is fluffy so that a large amount of still air can be stored inside the flakes. The fine fibers of the upper and lower layers can prevent the still air in the middle layer from flowing out, thereby conserving heat.

[0017] The multifunctional multi-layered composite flakes of the present invention adopt a layered design of fiber materials with different functions, and can provide a multifunctional composite flakes.

[0018] According to the test, the air permeability of the multifunctional multilayer composite flocculent sheet of the present invention is as high as 1100 mm / s and the bulkiness is as high as 75 cm / m 3 The recovery rate is over 97%. The thickness of the same gram weight flakes is nearly 20% higher than that of conventional flakes, and the Cro value of the same gram weight flakes is nearly 20% higher than that of conventional flakes. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below.

[0020] A multifunctional multilayer composite flake, comprising a surface flake and an intermediate flake. The entire flake is preferably made of 3-7 layers. Among them, the surface flake is located on the outside. The surface flake is composed of ultrafine fibers and is sprayed with glue and hot-polished to make a cover. The fiber fineness of the surface flake is 0.5D-1.5D. The ultrafine fibers include but are not limited to one or more of ultrafine polyester fibers, lyocell fibers, functional viscose fibers, nylon fibers, protein polyvinyl alcohol fibers, etc. The fibers of the surface layer are soft and skin-friendly, and are highly comfortable. The surface layer is divided into an upper surface layer and a lower surface layer according to different positions. Among them, the intermediate layer is located in the middle. The intermediate layer flake is made of coarse denier three-dimensional curled hollow fibers. The fiber fineness of the intermediate layer flake is 5D-8D. Coarse denier three-dimensional curled hollow fibers include but are not limited to one or more combinations of various functional polyester fibers, acrylic fibers, lyocell fibers, functional viscose fibers, nylon fibers, protein polyvinyl alcohol fibers, etc. Functions include but are not limited to one or a combination of antibacterial and anti-mite, deodorization, formaldehyde removal, far infrared, moisture absorption and heating, energy storage and heating, aromatherapy and sleep aid, etc. The middle layer flakes can have multiple layers, and the materials or functions of each middle layer flakes can be arbitrarily matched.

[0021] A multifunctional multi-layer composite flake may also include a sub-middle layer flake. The sub-middle layer flake is sandwiched between the surface layer flake and the middle layer flake. The sub-middle layer flake is made of a combination of three-dimensional curled hollow fibers and two-dimensional curled fibers. The fiber fineness of the sub-middle layer is 2D-5D. The fibers of the sub-middle layer flake include but are not limited to one or several combinations of various functional polyester fibers, acrylic fibers, lyocell fibers, functional viscose fibers, nylon fibers, protein polyvinyl alcohol fibers, etc. The functions include but are not limited to one or several combinations of antibacterial and anti-mite, deodorization, formaldehyde removal, far infrared, moisture absorption and heat generation, energy storage and heat generation, and aromatic sleep-aiding functions. The sub-middle layer can have multiple layers, and the materials or functions of each sub-middle layer can be arbitrarily matched.

[0022] The preparation method of the multifunctional multi-layer composite flakes comprises the following steps:

[0023] Step 1, opening and mixing: According to the functional design, coarse and fine matching, and the number of layers, the fiber raw materials are screened and evenly mixed and opened by different opening and mixing machines, and then transported to different carding machines. Preferably, low melting point fibers should be added to the flakes. According to the actual product performance requirements, the addition ratio of different layers is 8-25%.

[0024] Step 2: Combing into a web: Different carding machines comb fibers of different proportions and stack them into a web to form a single-layer flake.

[0025] Step 3, flake stacking and molding: different single-layer flakes are gathered and stacked together to form a multi-layer composite flake at one time.

[0026] Step 4, drying and shaping: the multi-layer composite flakes enter the oven, spray glue to shape, iron, trim and pack into rolls. Preferably, according to the actual product performance requirements, the surface glue spraying amount of the surface flakes is 5-20g / m 2 .

[0027] Example 1

[0028] 0.8D*38mm non-silicon ultrafine polyester fiber, 1.2D*38mm lyocell fiber, and 2D*51mm low-melting-point fiber are mixed and loosened evenly, and then combed to obtain upper surface flakes and lower surface flakes. The mass percentages of non-silicon ultrafine polyester fiber, lyocell fiber, and low-melting-point fiber are 60:20:20.

[0029] 3D*64mm three-dimensional curled hollow antibacterial polyester fiber, 2D*38mm two-dimensional moisture wicking polyester fiber, 3D*51mm two-dimensional shaped acrylic fiber, and 2D*51mm low melting point fiber are mixed and opened evenly, and then combed to obtain a secondary middle layer flake. Among them, the mass percentage of the three-dimensional curled hollow antibacterial polyester fiber, the two-dimensional moisture wicking polyester fiber, the two-dimensional shaped acrylic fiber, and the low melting point fiber is 50:20:20:10.

[0030] 6D*64 three-dimensional curled hollow far-infrared polyester fiber, 3D*64 two-dimensional silicon-free polyester fiber, and 2D*51mm low-melting point fiber are mixed and opened evenly, and then combed to obtain the middle layer flakes. Among them, the mass percentage of three-dimensional curled hollow far-infrared polyester fiber, two-dimensional silicon-free polyester fiber, and low-melting point fiber is 70:20:10.

[0031] There are 2 layers of sub-middle layer flakes, and the flake structure has 5 layers in total. From bottom to top, they are lower surface flakes, sub-middle layer flakes, middle layer flakes, sub-middle layer flakes, and upper surface layer flakes. Finally, the five layers of flakes converge and overlap to form a multifunctional multi-layer composite flake, which is 20g / m 2 After spraying glue, it is shaped in an oven, ironed, and then trimmed and packaged.

[0032] Flake performance test

[0033] Test 1, antibacterial performance test, the test results are shown in Table 1 below:

[0034]

[0035] Test 2, 300g / m 2 The flakes were tested for thermal insulation performance and other indicators. The test results are shown in Table 2 below:

[0036]

[0037] Example 2

[0038] 1.2D*38mm ultra-fine special-shaped polyester fiber, 1.0D*38mm milk protein viscose fiber, and 2D*51mm low-melting point fiber are mixed and loosened evenly, and then combed to obtain upper surface flakes and lower surface flakes. Among them, the mass percentages of ultra-fine special-shaped polyester fiber, milk protein viscose fiber, and low-melting point fiber are 50:25:25.

[0039] 3D*64mm three-dimensional curled hollow deodorizing polyester fiber, 2.5D*51mm two-dimensional energy storage heating polyester fiber, and 2D*51mm low melting point fiber are mixed and loosened evenly, and then combed to obtain a secondary middle layer flake. Among them, the mass percentage of the three-dimensional curled hollow deodorizing polyester fiber, the two-dimensional energy storage heating polyester fiber, and the low melting point fiber is 50:40:10.

[0040] 7D*64 three-dimensional curled hexagonal high-middle hollow polyester fiber, 5D*64 two-dimensional formaldehyde-removing polyester fiber, and 2D*51mm low-melting point fiber are mixed and opened evenly, and then combed to obtain an intermediate layer of flakes. Among them, the mass percentage of the three-dimensional curled hexagonal high-middle hollow polyester fiber, the two-dimensional formaldehyde-removing polyester fiber, and the low-melting point fiber is 50:40:10.

[0041] The middle layer is combed for 2 layers, and the flake structure has 6 layers in total. From bottom to top, they are the lower surface flake, the middle layer flake, the middle layer flake, the middle layer flake, the middle layer flake, the middle layer flake, and the upper surface flake. Finally, the six layers of flakes are gathered and laid together to form a multifunctional multi-layer composite flake, which is 15g / m 2 After spraying glue, it is shaped in an oven, ironed, and then trimmed and packaged.

[0042] Flake performance test

[0043] Test 1: Deodorization performance test. The test results are shown in Table 3 below:

[0044]

[0045] Test 2, 400g / m 2 The flakes were tested for thermal insulation performance and other indicators. The test results are shown in Table 4 below:

[0046]

[0047] Example 3

[0048] 1.0D*38mm ultrafine shaped nylon fiber, 0.8D*38mm moisture wicking polyester fiber, and 2D*51mm low melting point fiber are mixed and loosened evenly, and then combed to obtain upper surface flakes and lower surface flakes. Among them, the mass percentages of ultrafine shaped nylon fiber, moisture wicking polyester fiber, and low melting point fiber are 40:25:25.

[0049] 3D*64 three-dimensional curled straight acrylic fiber, 2.5D*64 two-dimensional antibacterial and anti-mite polyester fiber, and 2D*51mm low-melting point fiber are mixed and opened evenly, and then combed to obtain the middle layer flakes. Among them, the mass percentage of the three-dimensional curled straight acrylic fiber, the two-dimensional antibacterial and anti-mite polyester fiber, and the low-melting point fiber is 50:40:10.

[0050] The flake structure has 3 layers. From bottom to top, they are the lower surface flake, the middle layer flake, and the upper surface flake. Finally, the three layers of flakes are gathered and laid together to form a multifunctional multi-layer composite flake, which is 25g / m 2 After spraying glue, it is shaped in an oven, ironed, and then trimmed and packaged.

[0051] Flake performance test

[0052] Test 1: Suction and exhaust performance test. The test results are shown in Table 5 below:

[0053]

[0054] Test 2, 100g / m 2 The flakes were tested for antibacterial and anti-mite performance, and the test results are shown in Table 6 below:

[0055]

[0056] Test 3, for 100g / m 2 The flakes were tested for cooling performance and other indicators. The test results are shown in Table 7 below:

[0057]

[0058] When part of the fibers are colored, the flakes formed by the colored fibers can be placed inside, that is, as the middle layer flakes or the sub-middle layer flakes, so as to prevent the fibers from being colored and affecting the appearance.

[0059] In order to make each flake layer more closely bonded, the outer surface of the single-layer flake can be burred, such as by grinding. Thus, the burrs are used to increase the bonding strength between the two layers of flakes. In step 4, the oven is heated to make the low-melting point fiber hot-melt, so that the two layers of flakes are hot-melted and bonded, and the multi-layer composite flakes are pressed to make the two layers of flakes bond better. It is also possible that in step 3, after obtaining the multi-layer composite flakes, the multi-layer composite flakes are needle-punched, that is, the multi-layer composite flakes are pierced by a sharp object to form multiple micropores on the multi-layer composite flakes. During the piercing process, the sharp object will force part of the fibers in one layer of flakes to enter another layer of flakes, so that the two layers of flakes are better bonded. The formed microporous structure can effectively remove the air in the flakes during the drying process and improve the deformation of the flakes. The formed microporous structure can allow glue to enter during the glue spraying process, so that the overall appearance consistency of the multi-layer composite flakes is better and the glue surface is smoother. In addition, the glue entering the micropores can increase the connection strength between the glue layer and the surface flakes, and close the micropores to ensure the warmth retention of the multi-layer composite flakes. The micropores are preferably arranged in a matrix shape, and the distance between two adjacent micropores is 70cm-100cm. The micropores can be through holes or non-through holes. In the case of non-through holes, they can be pierced on both sides. That is, pierce from the upper surface flakes to the lower surface flakes, pierce the middle layer flakes, and form upper micropores. Pierce from the lower surface flakes to the upper surface flakes, pierce the middle layer flakes, and form lower micropores. The upper micropores and the lower micropores are not directly opposite.

[0060] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A multifunctional multi-layer composite flake, characterized in that: It includes a surface flake located on the outside and a middle flake located in the middle; The surface floccules are made of ultra-fine fibers and are glue-sprayed and hot-polished to form a cover, and the fiber fineness is 0.5D-1.5D; The middle layer flakes are made of coarse denier three-dimensional curled hollow fibers, and the fiber fineness is 5D-8D.

2. The multifunctional multi-layer composite flake according to claim 1, characterized in that: The fibers of the surface floccules are one or more of superfine polyester fibers, lyocell fibers, functional viscose fibers, nylon fibers, and protein-based polyvinyl alcohol fibers.

3. The multifunctional multi-layer composite flake according to claim 1, characterized in that: The fibers of the middle layer floccules are one or a combination of functional polyester fibers, acrylic fibers, lyocell fibers, functional viscose fibers, nylon fibers, and protein-based polyvinyl alcohol fibers.

4. The multifunctional multi-layer composite flake according to claim 1, characterized in that: It also includes a sub-middle layer flakes sandwiched between the surface layer flakes and the middle layer flakes. The sub-middle layer flakes are made of a combination of three-dimensional curled hollow fibers and two-dimensional curled fibers, and the fiber fineness is 2D-5D.

5. The multifunctional multi-layer composite flake according to claim 4, characterized in that: The fiber of the secondary middle layer flakes is one or a combination of functional polyester fiber, acrylic fiber, lyocell fiber, functional viscose fiber, nylon fiber, protein polyvinyl alcohol fiber and the like.

6. The multifunctional multilayer composite flake according to any one of claims 1 to 5, characterized in that: The fibers of each flake layer contain low-melting-point fibers, and each flake layer is connected by heat-melting the low-melting-point fibers.

7. The multifunctional multi-layer composite flake according to any one of claims 1 to 5, characterized in that: The surface glue spraying amount of the surface flakes is 5-20g / m 2 .

8. The method for preparing the multifunctional multi-layer composite flake according to any one of claims 1 to 5, characterized in that: The steps include: 0.8D*38mm silicon-free ultrafine polyester fiber, 1.2D*38mm lyocell fiber, and 2D*51mm low-melting-point fiber are mixed and loosened evenly, and then combed to obtain upper surface flakes and lower surface flakes; 3D*64mm three-dimensional curled hollow antibacterial polyester fiber, 2D*38mm two-dimensional moisture absorption and perspiration polyester fiber, 3D*51mm two-dimensional special-shaped acrylic fiber, and 2D*51mm low melting point fiber are mixed and opened evenly, and then combed to obtain a secondary middle layer flake; 6D*64 three-dimensional curled hollow far-infrared polyester fiber, 3D*64 two-dimensional silicon-free polyester fiber, and 2D*51mm low-melting point fiber are mixed and opened evenly, and then combed to obtain a middle layer of flakes; The flake structure has 5 layers, which are the lower surface flake, the second middle flake, the middle flake, the second middle flake, and the upper surface flake from bottom to top. Finally, the five layers of flakes are gathered and laid together to form a multifunctional multi-layer composite flake, which is 20g / m 2 After spraying glue, it is shaped in an oven, ironed, and then trimmed and packaged.

9. The method for preparing the multifunctional multilayer composite flake according to any one of claims 1 to 5, characterized in that: The steps include: 1.2D*38mm ultra-fine special-shaped polyester fiber, 1.0D*38mm milk protein viscose fiber, and 2D*51mm low-melting point fiber are mixed and loosened evenly, and then combed to obtain upper surface flakes and lower surface flakes; 3D*64mm three-dimensional curled hollow deodorizing polyester fiber, 2.5D*51mm two-dimensional energy storage heating polyester fiber, and 2D*51mm low melting point fiber are mixed and opened evenly, and then combed to obtain a secondary middle layer flake; 7D*64 three-dimensional curled hexagonal high-middle hollow polyester fiber, 5D*64 two-dimensional formaldehyde-removing polyester fiber, and 2D*51mm low-melting-point fiber are mixed and opened evenly, and then combed to obtain a middle layer of flakes; The flake structure has 6 layers, which are the lower surface flake, the second middle layer flake, the middle layer flake, the middle layer flake, the second middle layer flake, and the upper surface flake in the order from bottom to top. Finally, the six layers of flakes are gathered and laid together to form a multifunctional multi-layer composite flake, which is 15g / m 2 After spraying glue, it is shaped in an oven, ironed, and then trimmed and packaged.

10. The method for preparing the multifunctional multi-layer composite flake according to any one of claims 1 to 5, characterized in that: The steps include: 1.0D*38mm ultra-fine shaped nylon fiber, 0.8D*38mm moisture wicking polyester fiber, and 2D*51mm low melting point fiber are mixed and loosened evenly, and then combed to obtain upper surface flakes and lower surface flakes; 3D*64 three-dimensional curled straight acrylic fiber, 2.5D*64 two-dimensional antibacterial and anti-mite polyester fiber, and 2D*51mm low melting point fiber are mixed and opened evenly, and then combed to obtain a middle layer of flakes; The flake structure has 3 layers, which are the lower surface flake, the middle layer flake, and the upper surface flake in order from bottom to top. Finally, the three layers of flakes are gathered and superimposed to form a multifunctional multi-layer composite flake, which is 25g / m 2 After spraying glue, it is shaped in an oven, ironed, and then trimmed and packaged.

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