Hollow warm-keeping fiber

Abstract

The utility model discloses a hollow warm-keeping fiber which comprises a fiber body, a plurality of hollow channels are distributed in the fiber body in the circumferential direction on the cross section perpendicular to the extending direction of the fiber body, and the extending direction of the hollow channels is consistent with the extending direction of the fiber body; and the shape of the hollow channel on the cross section is triangular. The hollow warm-keeping fiber can reduce the deformation degree when being extruded, so that the problem that the warm-keeping effect of the fiber is reduced is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal insulation fibers, in particular to a hollow thermal insulation fiber. Background Art

[0002] Hollow thermal insulation fibers are fibers with hollow channels extending along the length of the fibers. A large amount of static air can be stored in the hollow channels, which can achieve excellent thermal insulation and thermal insulation effects. However, when the existing hollow thermal insulation fibers are squeezed, the internal hollow channels will deform, resulting in a decrease in the hollowness of the fibers, a decrease in the amount of air stored in the fibers, and a decrease in the thermal insulation effect of the fibers. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned defects or problems existing in the background technology and to provide a hollow thermal insulation fiber which can reduce the degree of deformation when squeezed, thereby improving the problem of decreased thermal insulation effect of the fiber.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The first technical solution: a hollow thermal insulation fiber, which includes a fiber body; on a cross section perpendicular to the extension direction of the fiber body, the fiber body is provided with a plurality of hollow channels along the circumferential direction, and the extension direction of the hollow channels is consistent with the extension direction of the fiber body; the shape of the hollow channels on the cross section is a triangle.

[0006] The second technical solution is based on the first technical solution: on the cross section, the hollow channels are arranged circumferentially in a rotationally symmetrical manner.

[0007] The third technical solution is based on the second technical solution: in the cross section, the shape of the hollow channel is an isosceles triangle, and the waist length of the isosceles triangle is greater than the base length.

[0008] The fourth technical solution is based on the third technical solution: on the cross section, the vertex angles of the isosceles triangles formed by each of the hollow channels point to the rotational symmetry center of the hollow channel.

[0009] The fifth technical solution is based on the fourth technical solution: in the fiber body, the number of the hollow channels is 3-7.

[0010] The sixth technical solution is based on the first to fifth technical solutions: an infrared reflection layer is attached to the inner wall of each of the hollow channels.

[0011] The seventh technical solution is based on the sixth technical solution: an infrared reflection layer is attached to the outer wall of the fiber body.

[0012] From the above description of the utility model, it can be seen that compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model provides a hollow thermal insulation fiber, which is provided with a plurality of hollow channels, which are arranged in a circumferential direction, and the cross-sectional shape of the hollow channel is triangular, and the triangular hollow channel has high structural stability. When it is squeezed, the sides of the triangular hollow channel support each other, so that the hollow channel is not easy to deform, and the plurality of hollow channels are arranged in a circumferential direction, so that when the cross-sectional size of the hollow channel is small, it can be ensured that the fiber has a certain hollowness. Therefore, the fiber can have a good thermal insulation effect, and when it is squeezed, the thermal insulation effect will not be reduced too much.

[0014] Among them, the hollow channels are arranged in a rotationally symmetrical manner, which can effectively utilize the space in the fiber cross section, increase the number of hollow channels as much as possible, and improve the hollowness of the fiber.

[0015] In addition, the cross-sectional shape of the hollow channel is set to an isosceles triangle, and the waist of the triangle is longer than the base. The shorter base can make the hollow channel more slender in cross section, and the vertex angle of the isosceles triangle points to the rotational symmetry center of the hollow channel. When squeezed, the base of the hollow channel is first subjected to force. Since the base is shorter, most of the force is borne by the fiber body. While ensuring the same cross-sectional area, the impacted part of the hollow channel is smaller and the degree of deformation is lower.

[0016] Providing an infrared reflection layer on the outer wall of the fiber body and the inner wall of the hollow channel can further enhance the warmth retention effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the cross-sectional structure of an embodiment of the hollow thermal insulation fiber provided by the utility model;

[0019] Figure 2 A schematic diagram of the vertical cross-section structure of an embodiment of the hollow thermal insulation fiber provided by the utility model;

[0020] Figure 3 This is a schematic cross-sectional view of an embodiment of the hollow thermal insulation fiber provided by the utility model before and after being squeezed.

[0021] Description of main reference numerals:

[0022] Hollow channel 1; fiber body 2; channel combination 3; unextruded channel 4; extruded channel 5. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0025] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the specific protection scope of the utility model.

[0026] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0027] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0028] Embodiment 1 of the utility model provides a hollow thermal insulation fiber, which includes a fiber body 2, a plurality of hollow channels 1 are arranged in the fiber body 2, and an infrared reflection layer is attached to the inner wall of the hollow channel 1, thereby obtaining the hollow thermal insulation fiber.

[0029] Specifically, refer to Figure 1, which shows that in a cross section perpendicular to the extension direction of the fiber body 2, the fiber body 2 is provided with a plurality of hollow channels 1 along the circumferential direction, the extension direction of each hollow channel 1 is consistent with the extension direction of the fiber body 2, and the shape of each hollow channel 1 in the cross section is a triangle.

[0030] Specifically, refer to Figure 2 , which shows the structure of the fiber body 2, and from Figure 2 It can be seen that the fiber body 2 is a cylindrical filament with a certain length, and its cross-section is circular, so it defines a circumferential direction. At the same time, the length direction of the fiber body 2 defines an axial direction, and the center position of the fiber body 2 on the cross-section forms the axial part of the fiber body 2.

[0031] A plurality of hollow channels 1 are arranged circumferentially on the fiber body 2, and these hollow channels 1 cooperate to form a channel combination 3. The hollow channels 1 in the channel combination 3 extend along the length direction of the fiber body 2, and the length of these hollow channels 1 is consistent with the length of the fiber body 2, so openings can be formed at both ends of the fiber body 2, and air can enter the hollow channels 1 from these openings. Since the cross section of the fiber body 2 is circular, the arrangement of multiple hollow channels 1 in the circumferential direction can be understood as the arrangement of these hollow channels 1 in sequence along the circumferential edge of the fiber body 2. Moreover, the shape of these hollow channels 1 in the cross section is triangular. The triangular hollow channel 1 has a high structural stability. When it is squeezed, the sides of the triangular hollow channel 1 support each other, so that the hollow channel 1 is not easy to deform, and the plurality of hollow channels 1 are arranged in the circumferential direction. When the cross-sectional size of the hollow channel 1 is small, the fiber can be guaranteed to have a certain hollowness, thereby, the fiber can have a good warming effect, and when squeezed, it will not cause the warming effect to drop too much.

[0032] Preferably, in the cross section of the fiber body 2, the hollow channels 1 are arranged circumferentially in a rotationally symmetrical manner. Figure 1 The rotational symmetry center of the hollow channels 1 is the center of the circle formed by the fiber body 2. In this embodiment, the number of the hollow channels 1 is 6, and the 6 hollow channels 1 are evenly arranged in the circumferential direction, so the central angle between the centers of the triangular shapes corresponding to the adjacent hollow channels 1 is 60 degrees. By arranging in a rotationally symmetrical manner, the space of the fiber body 2 on the cross section can be more effectively utilized, the number of the hollow channels 1 can be increased as much as possible, and the hollowness of the fiber can be increased.

[0033] Of course, in other embodiments, the number of hollow channels 1 can also be set to other numbers, such as 4, 5, 7, etc., but the number range of hollow channels 1 in a fiber body 2 should be between 3-7 to ensure that there are a sufficient number of hollow channels 1, while not affecting the strength of the fiber itself due to too many hollow channels 1.

[0034] Reference Figure 1 In this embodiment, on the cross section of the fiber body 2, the shape of the hollow channel 1 is an isosceles triangle, and the waist length of the isosceles triangle is greater than the base length, and the vertex angles of the isosceles triangles all point to the rotational symmetry center of the hollow channel 1. Specifically, referring to Figure 1 , the triangle formed by the hollow channel 1 on the cross section of the fiber body 2 is an isosceles triangle, with its base facing the outside of the fiber body 2 and its vertex pointing to the rotational symmetry center of the hollow channel 1. The cross-sectional shape of the hollow channel 1 is set to an isosceles triangle, and the waist of the triangle is longer than the base. The shorter base can make the hollow channel 1 more slender in the cross section, and the vertex of the isosceles triangle points to the rotational symmetry center of the hollow channel 1. When squeezed, the base of the hollow channel 1 is first subjected to force. Since the base is shorter, most of the force is borne by the fiber body 2. While ensuring the same cross-sectional area, the impacted part of the hollow channel 1 is smaller and the degree of deformation is lower.

[0035] In addition, in this embodiment, an infrared reflection layer is also attached to the inner wall of the hollow channel 1, and the infrared reflection layer is formed by the attachment of infrared reflection gel. In this embodiment, the infrared reflection gel is obtained by hydrolysis and polycondensation of fibrous nanosilver, a metal coupling agent containing an amide group and a silicon element, and an alkoxide compound.

[0036] The present embodiment also provides a method for preparing the above-mentioned hollow thermal insulation fiber, which includes the following steps: spinning a resin raw material through a spinneret to obtain a fiber body 2; on a cross section perpendicular to the extension direction of the fiber body 2, the fiber body 2 is provided with a plurality of hollow channels 1 along the circumferential direction, and the extension direction of the hollow channels 1 is consistent with the extension direction of the fiber body 2; the shape of the hollow channels 1 on the cross section is triangular; cutting and surface active finishing of the fiber body 2 is performed to obtain a pretreated fiber body 2; placing the pretreated fiber body 2 vertically so that the bottom of the fiber body 2 is immersed in the infrared reflective gel material, using the capillary effect to absorb the infrared reflective gel material into the hollow channel 1, and heating the infrared reflective gel material to adhere to the inner wall of the hollow channel 1, so as to obtain a fiber with an infrared reflective layer. Furthermore, after obtaining the fiber with an infrared reflective layer, it is also placed in deionized water for multiple washings and then dried to obtain the final hollow thermal insulation fiber.

[0037] Specifically, the spinneret is provided with a preset number of spinnerets with triangular holes pointing to the fiber axis, through which the fiber body 2 having a plurality of hollow channels 1 in the cross section is obtained by spinning. The resin material used for spinning can be selected according to actual conditions, such as polyester, nylon, etc., and polyester is selected in this embodiment.

[0038] The fiber body 2 is then cut to obtain short fibers with a length of 35 mm to 80 mm, which is the short fiber length of the optimal spinning process. The twisting effect compresses the fiber body 2, which can improve the strength and warmth retention of the fiber body 2.

[0039] Afterwards, the cut fiber body 2 is pretreated, that is, surface active treatment is performed to improve the interface affinity between the outer surface of the fiber body 2 and the inner wall of the hollow channel 1, so as to facilitate the subsequent attachment of the infrared reflective gel.

[0040] Afterwards, the pretreated fiber body 2 is placed vertically, so that the bottom of the fiber body 2 is immersed in the infrared reflective gel material, and the infrared reflective gel is sucked into the inner wall of the hollow channel 1 by the capillary effect, and then the fiber body 2 is placed in a high temperature environment so that the infrared reflective gel material adheres to the inner wall of the hollow channel 1. The temperature of the high temperature environment here can be specifically 125 degrees Celsius to 150 degrees Celsius. Of course, the fiber body 2 can also be placed in the infrared reflective gel material afterwards, and the infrared reflective gel material is attached to the outer surface of the fiber body 2 by heating to improve the overall warmth retention effect of the fiber.

[0041] Afterwards, the fiber body 2 to which the infrared reflection layer has been attached can be washed with deionized water and dried, and after repeated multiple times, the infrared reflection layer can be further solidified on the fiber body 2, thereby obtaining a hollow thermal insulation fiber.

[0042] By means of the capillary effect, the infrared reflective gel is absorbed into the fiber body 2, and an infrared reflective layer can be provided on the inner wall of the hollow channel 1, which can further enhance the warming effect. This method can also conveniently attach the infrared reflective gel to the inner wall of the hollow channel 1. Moreover, by providing the infrared reflective layer on the inner wall of the hollow channel 1, it is possible to avoid the infrared reflective layer from falling off due to scratching when provided on the outer surface of the fiber body 2, thereby extending the duration of the warming effect of the fiber.

[0043] Reference Figure 3 , which is a microscopic enlarged picture of the actual product of the hollow thermal insulation fiber, Figure 3 The left figure shows the hollow thermal insulation fiber when it is not squeezed, wherein the hollow channel 1 when it is not squeezed is the unsqueezed channel 4, and its shape is basically Figure 1 The shape shown; Figure 3The right side figure shows the hollow thermal insulation fiber when it is squeezed, wherein the hollow channel 1 when squeezed is the squeezed channel 5, and its shape is different from that of the hollow channel 1. Figure 1 The shape shown is slightly deformed, but the relatively complete hollow channel 1 can still be maintained, and the hollowness of the fiber decreases to a low degree. The above-mentioned extrusion of the hollow thermal insulation fiber refers to applying a certain pressure on the symmetrical sides of the hollow thermal insulation fiber, and the pressure ranges from 5N to 10N.

[0044] Depend on Figure 3 It can be seen that the hollow thermal insulation fiber provided in this embodiment can still maintain a good shape when squeezed by a certain range of forces, and can avoid the hollowness of the hollow thermal insulation fiber from decreasing too much. It should be noted that the hollowness referred to here refers to the space occupied by the hollow channel 1 inside the cylindrical structure relative to the volume of the outer wall of the fiber body 2. When squeezed, the hollow channel 1 in the fiber will be compressed, resulting in a reduction in the occupied space, which in turn leads to a decrease in hollowness. Only by improving the structural stability of the hollow channel 1 can the color shell ensure that the fiber can still have a high hollowness when squeezed.

[0045] The description of the above specification and embodiments is used to explain the protection scope of the utility model, but does not constitute a limitation on the protection scope of the utility model. Through the enlightenment of the utility model or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent replacements or other improvements to the embodiments of the utility model or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the utility model.

Claims

1. A hollow thermal insulation fiber, characterized in that: comprising a fiber body (2); On a cross section perpendicular to the extension direction of the fiber body (2), the fiber body (2) is provided with a plurality of hollow channels (1) along the circumferential direction, and the extension direction of the hollow channels (1) is consistent with the extension direction of the fiber body (2); The shape of the hollow channel (1) in the cross section is triangular.

2. A hollow thermal insulation fiber as claimed in claim 1, characterized in that: In the cross section, the hollow channels (1) are arranged circumferentially in a rotationally symmetrical manner.

3. A hollow thermal insulation fiber as claimed in claim 2, characterized in that: In the cross section, the shape of the hollow channel (1) is an isosceles triangle, and the waist length of the isosceles triangle is greater than the base length.

4. The hollow thermal insulation fiber according to claim 3, characterized in that: In the cross section, the vertex angles of the isosceles triangles formed by each of the hollow channels (1) point to the rotational symmetry center of the hollow channel (1).

5. The hollow thermal insulation fiber according to claim 4, characterized in that: In the fiber body (2), the number of the hollow channels (1) is 3-7.

6. A hollow thermal insulation fiber according to any one of claims 1 to 5, characterized in that: An infrared reflection layer is attached to the inner wall of each hollow channel (1).

7. The hollow thermal insulation fiber according to claim 6, characterized in that: An infrared reflection layer is attached to the outer wall of the fiber body (2).

Images