Polyimide nanofiber composite flocculus with multilayer structure

Abstract

The utility model discloses a polyimide nanofiber composite flocculus with a multilayer structure, which comprises a first fiber flocculus layer, a second fiber flocculus layer and a third fiber flocculus layer, and the first fiber flocculus layer and the third fiber flocculus layer are made of polyimide nanofibers. The first fiber flocculus layer and the third fiber flocculus layer are distributed on the upper layer and the lower layer of the flocculus, the second fiber flocculus layer is arranged between the first fiber flocculus layer and the third fiber flocculus layer, and the thickness of the second fiber flocculus layer is larger than that of the first fiber flocculus layer. And the thickness of the second fiber flocculus layer is greater than that of the third fiber flocculus layer. The flocculus is composed of a multi-layer flocculus composite structure, air flowing can be hindered, the composite flocculus can store a large amount of still air, the heat insulation and heat preservation effects are excellent, the flocculus is light, thin and comfortable, meanwhile, the composite flocculus has the advantages of being good in mildew resistance, bacterium resistance, flame retardance, far infrared rays and the like, the cost is controllable, and large-scale popularization is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of fiber flakes, in particular to a multi-layered polyimide nanofiber composite flake. Background Art

[0002] In recent years, science and technology have developed rapidly, people's quality of life has been greatly improved, and the choice of home textile products has tended to be more diversified and functional products. Wadding refers to a sheet made of plant fiber, animal fiber or chemical fiber for warmth, heat insulation or shockproofing with a fluffy structure. In the field of thermal insulation materials for textiles, wadding, as a loose filling material, has the advantages of light weight and warmth retention.

[0003] However, due to the large pore size of this type of fiber flakes, when there is wind and the temperature difference between the inside and outside is large, air flow may easily cause heat loss, thereby reducing its thermal insulation. The thickness of the flakes needs to be increased to improve its thermal insulation. If the thickness of the flakes is too thick, the finished product may be bulky, which does not meet people's demand for light, thin and comfortable thermal insulation flakes. Therefore, the market urgently needs to develop a multi-layer polyimide nanofiber composite flake to help people solve the existing problems. Utility Model Content

[0004] The purpose of the utility model is to provide a multi-layer polyimide nanofiber composite flake to solve the problem that the fiber flake proposed in the above background technology has a large pore size, which easily causes air flow and heat loss when there is wind and a large temperature difference between the inside and the outside, thereby reducing its warmth retention.

[0005] To achieve the above objectives, the utility model provides the following technical solutions: a multi-layered polyimide nanofiber composite flake, comprising a first fiber flake layer, a second fiber flake layer and a third fiber flake layer, wherein the first fiber flake layer and the third fiber flake layer are made of polyimide nanofibers.

[0006] Preferably, the first fiber flake layer and the third fiber flake layer are distributed in the upper and lower layers of the flakes, the second fiber flake layer is arranged between the first fiber flake layer and the third fiber flake layer, the thickness of the second fiber flake layer is greater than the thickness of the first fiber flake layer, and the thickness of the second fiber flake layer is greater than the thickness of the third fiber flake layer.

[0007] Preferably, the first fiber flake layer and the third fiber flake layer have a surface density of 10-50 g / m² and a thickness of 2-20 mm.

[0008] Preferably, the second fiber flake layer is made of one or more of plant fiber, animal fiber, and chemical fiber, and the surface density of the second fiber flake layer is 30-200 g / m² and the thickness is 10-100 mm.

[0009] Preferably, the surface density ratios of the first fiber flake layer, the third fiber flake layer and the second fiber flake layer are all 1:3-20, and the thickness ratios are all 1:5-50.

[0010] Preferably, the composite bonding process of the first fiber flake layer, the second fiber flake layer and the third fiber flake layer is one or more of spraying composite, rolling composite, hot melt adhesive powdering and hot melt adhesive dot composite.

[0011] Preferably, mesh sheets are arranged on the inner sides of the first fiber flake layer and the third fiber flake layer, the mesh sheets are arranged as a mesh structure, and the mesh wires of the mesh sheets are made of one of plant fiber yarns, animal fiber yarns or chemical fiber yarns.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model adopts polyimide nanofiber material in the fiber flakes. Among many materials, polyimide is known as the organic polymer material with the highest comprehensive performance. It has the characteristics of high and low temperature resistance, flame retardancy, light weight, warmth retention, antibacterial, far infrared, etc. Its fiber is a good basic material for preparing flakes, and the nanofiber has the characteristics of small diameter, small pore size, high specific surface area, high porosity, good flexibility and three-dimensional grid-like porous structure. It can hinder the flow of air and store a large amount of still air. It has obvious application advantages in the field of warmth retention and can effectively improve the warmth retention ability.

[0014] The utility model arranges the first fiber flake layer, the second fiber flake layer and the third fiber flake layer so that the flakes are composed of a multi-layer flake composite structure. The polyimide nanofiber flake layers distributed in the upper and lower layers can hinder the flow of air, so that the composite flakes can store a large amount of still air, with excellent heat insulation and warmth retention effects, making the flakes light, thin and comfortable.

[0015] After the composite floccules are composited with the polyimide nanofiber floccules layer, the utility model not only gives the composite floccules good mildew resistance, antibacterial, flame retardant, far infrared and other characteristics, but also has controllable costs, is easy to promote on a large scale, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a partial cross-sectional front view of a multi-layered polyimide nanofiber composite flake of the utility model;

[0017] Figure 2 The utility model is a schematic diagram of the decomposition of a multi-layer structure polyimide nanofiber composite flake.

[0018] In the figure: 1, first fiber flake layer; 2, second fiber flake layer; 3, third fiber flake layer; 4, mesh. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Embodiment 1

[0021] See also Figure 1-2 The utility model provides an embodiment: a multi-layer structure polyimide nanofiber composite flocculent, comprising a first fiber flocculent layer 1, a second fiber flocculent layer 2 and a third fiber flocculent layer 3, the first fiber flocculent layer 1 and the third fiber flocculent layer 3 are made of polyimide nanofibers, the first fiber flocculent layer 1 and the third fiber flocculent layer 3 are distributed in the upper and lower layers of the flocculent, the second fiber flocculent layer 2 is arranged between the first fiber flocculent layer 1 and the third fiber flocculent layer 3, the thickness of the second fiber flocculent layer 2 is greater than the thickness of the first fiber flocculent layer 1, the thickness of the second fiber flocculent layer 2 is greater than the thickness of the third fiber flocculent layer 3, the thickness of the first fiber flocculent layer 1 and the thickness of the third fiber flocculent layer 3 can be the same or different.

[0022] Polyimide nanofiber is an existing material, and the preparation process can refer to CN101603213A. Polyimide is known as the organic polymer material with the highest comprehensive performance. It has the characteristics of high and low temperature resistance, flame retardancy, light weight, warmth preservation, antibacterial, far infrared, etc., and nanofiber has the characteristics of small diameter, small pore size, high specific surface area, high porosity, good flexibility and three-dimensional grid-like porous structure, which can hinder the flow of air and store a large amount of still air, so that the composite flakes composed of the composite structure, wherein the polyimide nanofiber flake layers distributed in the upper and lower layers can hinder the flow of air, so that the composite flakes can store a large amount of still air, and the heat insulation and warmth preservation effect is excellent, and the flakes are light and comfortable. It also has good mildew resistance, antibacterial, far infrared, etc., and the cost is controllable, easy to promote on a large scale, and good practicality.

[0023] Furthermore, the surface density of the first fiber flake layer 1 and the third fiber flake layer 3 is 15 g / m2, and the thickness is 2-20 mm.

[0024] Furthermore, the second fiber flake layer 2 is made of polyester fiber, and the surface density of the second fiber flake layer 2 is 100g / m² and the thickness is 10-100mm.

[0025] Furthermore, the surface density ratios of the first fiber batt layer 1 , the third fiber batt layer 3 , and the second fiber batt layer 2 are all 1:3-20, and the thickness ratios are all 1:5-50.

[0026] Furthermore, the composite bonding process of the first fiber flake layer 1, the second fiber flake layer 2 and the third fiber flake layer 3 is one or more of spray bonding, roller bonding, hot melt adhesive powdering and hot melt adhesive dot bonding, and the composite bonding process is an existing process method.

[0027] Multilayer structure of polyimide nanofiber composite flakes:

[0028] The structure is a sandwich structure. The polyimide nanofiber flake layers distributed in the upper and lower layers are composed of 15g / m² polyimide nanofibers, and the middle fiber flake layer is composed of 100g / m² polyester fibers.

[0029] Weaving method of polyimide nanofiber composite flakes:

[0030] (1) Combing the fibers into flakes and laying them flat, and then stacking them horizontally and vertically;

[0031] (2) The outer fiber layer is polyimide nanofiber, a polyester fiber layer is added between the two polyimide nanofiber layers, and the three fiber layers are composited by cross-laying;

[0032] (3) The fiber layers are bonded and fixed by spraying a water-based adhesive to obtain a multi-layer composite flake.

[0033] After testing, the composite flake surface density is 130.5g / m² and the Krogh value is 4.3 m2·K / W.

[0034] Furthermore, meshes 4 are provided on the inner sides of the first fiber flake layer 1 and the third fiber flake layer 3. The meshes 4 are provided as a mesh structure. The mesh wires of the meshes 4 are made of one of plant fiber yarns, animal fiber yarns or chemical fiber yarns. The mesh wires of the meshes 4 are made of existing materials.

[0035] By setting the mesh 4, a dividing line is created between the first fiber flake layer 1, the third fiber flake layer 3 and the second fiber flake layer 2, so that the thicknesses of different fiber flake layers can be identified, which is beneficial for people to identify the internal structure and convenient for detecting the thickness ratio between different fiber flake layers when composite flakes are formed. In addition, the setting of the mesh 4 can form a reinforced mesh structure in the composite flakes, thereby increasing the structural strength of the composite flakes and facilitating the stable use of the composite flakes.

[0036] Embodiment 2

[0037] See also Figure 1-2The utility model provides an embodiment: a multi-layer structure polyimide nanofiber composite flocculent, comprising a first fiber flocculent layer 1, a second fiber flocculent layer 2 and a third fiber flocculent layer 3, the first fiber flocculent layer 1 and the third fiber flocculent layer 3 are made of polyimide nanofibers, the first fiber flocculent layer 1 and the third fiber flocculent layer 3 are distributed in the upper and lower layers of the flocculent, the second fiber flocculent layer 2 is arranged between the first fiber flocculent layer 1 and the third fiber flocculent layer 3, the thickness of the second fiber flocculent layer 2 is greater than the thickness of the first fiber flocculent layer 1, the thickness of the second fiber flocculent layer 2 is greater than the thickness of the third fiber flocculent layer 3, the thickness of the first fiber flocculent layer 1 and the thickness of the third fiber flocculent layer 3 can be the same or different.

[0038] Polyimide nanofiber is an existing material, and the preparation process can refer to CN101603213A. Polyimide is known as the organic polymer material with the highest comprehensive performance. It has the characteristics of high and low temperature resistance, flame retardancy, light weight, warmth preservation, antibacterial, far infrared, etc., and nanofiber has the characteristics of small diameter, small pore size, high specific surface area, high porosity, good flexibility and three-dimensional grid-like porous structure, which can hinder the flow of air and store a large amount of still air, so that the composite flakes composed of the composite structure, wherein the polyimide nanofiber flake layers distributed in the upper and lower layers can hinder the flow of air, so that the composite flakes can store a large amount of still air, and the heat insulation and warmth preservation effect is excellent, and the flakes are light and comfortable. It also has good mildew resistance, antibacterial, far infrared, etc., and the cost is controllable, easy to promote on a large scale, and good practicality.

[0039] Furthermore, the surface density of the first fiber flake layer 1 and the third fiber flake layer 3 is 15 g / m2, and the thickness is 2-20 mm.

[0040] Furthermore, the second fiber flake layer 2 is made of a blend of polyimide fiber and polyester fiber, and the surface density of the second fiber flake layer 2 is 60g / m² and the thickness is 10-100mm.

[0041] Furthermore, the surface density ratios of the first fiber batt layer 1 , the third fiber batt layer 3 , and the second fiber batt layer 2 are all 1:3-20, and the thickness ratios are all 1:5-50.

[0042] Furthermore, the composite bonding process of the first fiber flake layer 1, the second fiber flake layer 2 and the third fiber flake layer 3 is one or more of spray bonding, roller bonding, hot melt adhesive powdering and hot melt adhesive dot bonding, and the composite bonding process is an existing process method.

[0043] Multilayer structure of polyimide nanofiber composite flakes:

[0044] The structure is a sandwich structure. The polyimide nanofiber flake layers distributed in the upper and lower layers are composed of 15g / m² polyimide nanofibers, and the middle fiber flake layer is composed of 60g / m² polyester fibers.

[0045] Weaving method of polyimide nanofiber composite flakes:

[0046] (4) Combing the fibers into flakes and laying them flat, and stacking them horizontally and vertically;

[0047] (5) The outer fiber layer is polyimide nanofiber, a polyester fiber layer is added between the two polyimide nanofiber layers, and the three fiber layers are composited by cross-laying;

[0048] The fiber layers are bonded and fixed by spraying a water-based adhesive to obtain a multi-layer composite flake.

[0049] After testing, the composite flake surface density is 90.3g / m² and the Krogh value is 3.1 m2·K / W.

[0050] Furthermore, meshes 4 are provided on the inner sides of the first fiber flake layer 1 and the third fiber flake layer 3. The meshes 4 are provided as a mesh structure. The mesh wires of the meshes 4 are made of one of plant fiber yarns, animal fiber yarns or chemical fiber yarns. The mesh wires of the meshes 4 are made of existing materials.

[0051] By setting the mesh 4, a dividing line is created between the first fiber flake layer 1, the third fiber flake layer 3 and the second fiber flake layer 2, so that the thicknesses of different fiber flake layers can be identified, which is beneficial for people to identify the internal structure and convenient for detecting the thickness ratio between different fiber flake layers when composite flakes are formed. In addition, the setting of the mesh 4 can form a reinforced mesh structure in the composite flakes, thereby increasing the structural strength of the composite flakes and facilitating the stable use of the composite flakes.

[0052] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A multi-layered polyimide nanofiber composite flake, characterized in that: It comprises a first fiber flake layer (1), a second fiber flake layer (2) and a third fiber flake layer (3), wherein the first fiber flake layer (1) and the third fiber flake layer (3) are made of polyimide nanofibers.

2. The multi-layered polyimide nanofiber composite flake according to claim 1, characterized in that: The first fiber flake layer (1) and the third fiber flake layer (3) are distributed in the upper and lower layers of the flakes, and the second fiber flake layer (2) is arranged between the first fiber flake layer (1) and the third fiber flake layer (3). The thickness of the second fiber flake layer (2) is greater than the thickness of the first fiber flake layer (1), and the thickness of the second fiber flake layer (2) is greater than the thickness of the third fiber flake layer (3).

3. The multi-layered polyimide nanofiber composite flake according to claim 1, characterized in that: The first fiber flake layer (1) and the third fiber flake layer (3) have a surface density of 10-50 g / m² and a thickness of 2-20 mm.

4. The multi-layered polyimide nanofiber composite flake according to claim 1, characterized in that: The second fiber flake layer (2) is made of one or more of plant fiber, animal fiber, and chemical fiber, and the surface density of the second fiber flake layer (2) is 30-200 g / m² and the thickness is 10-100 mm.

5. The multi-layered polyimide nanofiber composite flake according to claim 1, characterized in that: The surface density ratios of the first fiber flake layer (1), the third fiber flake layer (3) and the second fiber flake layer (2) are all 1:3-20, and the thickness ratios are all 1:5-50.

6. The multi-layered polyimide nanofiber composite flake according to claim 1, characterized in that: The composite bonding process of the first fiber flake layer (1), the second fiber flake layer (2) and the third fiber flake layer (3) is one or more of spraying composite, rolling composite, hot melt adhesive powdering and hot melt adhesive dot composite.

7. The multi-layered polyimide nanofiber composite flake according to claim 1, characterized in that: A mesh sheet (4) is provided on the inner side of each of the first fiber flake layer (1) and the third fiber flake layer (3); the mesh sheet (4) is provided as a mesh structure; and the mesh wire of the mesh sheet (4) is made of one of plant fiber yarns, animal fiber yarns or chemical fiber yarns.

Images