Special-shaped bio-based 2, 5-furandicarboxylic acid polyester fiber

Abstract

The utility model discloses a special-shaped bio-based 2, 5 furandicarboxylic acid polyester fiber, which comprises a PEF fiber main body, a special-shaped cavity is arranged in the middle of the PEF fiber main body, and the special-shaped cavity comprises a first cavity arranged in a straight line shape and two second cavities symmetrically arranged in the middle of the first cavity. The second cavity is of an arc-shaped structure and is arranged in an outwards-sunken mode. Through the innovative section design, the elasticity, the mechanical property, the hygroscopicity and the anti-pilling property of the fiber are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical fibers, in particular to a special-shaped bio-based 2,5-furandicarboxylic acid polyester fiber. Background Art

[0002] As environmental protection becomes increasingly popular, bio-based materials are becoming a research hotspot. 2,5-Furandicarboxylic acid, as an important bio-based raw material, shows promising application prospects in the preparation of polyester materials. However, current bio-based polyethylene 2,5-furandicarboxylate (PEF) fibers still have some deficiencies in mechanical properties and spinnability, which limits their widespread application in the textile field.

[0003] The cross-sectional shape of a fiber is closely related to its properties. By modifying the cross-sectional shape of a fiber, desired properties can be imparted to the fiber, thereby improving its overall performance and enhancing its applicability. Therefore, developing a PEF fiber with a special cross-sectional shape and a special internal cavity to improve its mechanical properties and hygroscopicity has important practical significance and application value. Summary of the Invention

[0004] In order to solve certain technical problems existing in the prior art, the purpose of this application is to provide a special-shaped bio-based 2,5-furandicarboxylic acid polyester fiber, which improves the elasticity, mechanical properties, moisture absorption and anti-pilling properties of the fiber through innovative cross-sectional design.

[0005] To solve the above existing technical problems, this application adopts the following technical solutions:

[0006] A special-shaped bio-based 2,5-furandicarboxylic acid polyester fiber includes a PEF fiber body, a special-shaped cavity is provided in the middle of the PEF fiber body, the special-shaped cavity includes a first cavity arranged in an "I" shape, two second cavities symmetrically arranged in the middle of the first cavity, and the second cavity is an arc-shaped structure and is concave outward.

[0007] Preferably, the cross section of the PEF fiber body is circular, and the side surface of the PEF fiber body is provided with a plurality of grooves which are arranged parallel to each other and have inwardly concave cross sections.

[0008] Preferably, the groove is a V-shaped structure, and the V-shaped bottom of the groove faces the center of the PEF fiber body.

[0009] Preferably, a third cavity is transversely provided at one end of the first cavity, and the first cavity and the third cavity are arranged in a "T" shape.

[0010] Preferably, third cavities are transversely provided at both ends of the first cavity, and the first cavity and the two third cavities are arranged in an "H" shape.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The cross-section of the PEF fiber is a circular structure with multiple V-shaped grooves uniformly formed inward from the circumference. This increases its specific surface area compared to circular fibers, improving moisture absorption and dyeability. These V-shaped grooves create capillaries on the fiber surface, enhancing moisture absorption and permeability while also increasing pilling resistance and abrasion resistance. The fiber itself also has a shaped cavity structure with a symmetrical semi-arc-shaped second cavity at its center, which increases its elasticity and improves the PEF fiber's inherent mechanical properties, resulting in higher strength, softness, and fluffiness. PEF fiber is also environmentally friendly and biodegradable, reducing environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a cross-sectional view of the overall structure of the utility model;

[0014] Figure 2 This is a cross-sectional view of a T-shaped cavity in the present invention;

[0015] Figure 3 This is a cross-sectional view of the H-shaped cavity in the present invention;

[0016] In the figure: 1, PEF fiber body; 2, special-shaped cavity; 3, second cavity; 4, first cavity; 5, groove; 6, third cavity. DETAILED DESCRIPTION

[0017] Below, the present application is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0018] In the description of this application, it should be understood that the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0019] The terms "first," "second," and the like in this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0020] Example 1:

[0021] like Figure 1 As shown, a special-shaped bio-based 2,5-furandicarboxylic acid polyester fiber includes a PEF fiber body 1, and a special-shaped cavity 2 is provided in the middle of the PEF fiber body 1. The special-shaped cavity 2 includes a first cavity 4 arranged in an "I" shape, and two second cavities 3 symmetrically arranged in the middle of the first cavity 4. The second cavity 3 is an arc-shaped structure and is concave outward.

[0022] The PEF fiber body 1 is made of a polyester material produced by the polymerization reaction of bio-based 2,5-furandicarboxylic acid and ethylene glycol. It has excellent environmental performance and is biodegradable, helping to reduce environmental pollution. A special-shaped cavity 2 is provided within the PEF fiber body 1. The main body of the special-shaped cavity 2 has a first cavity 4 in the shape of a straight line, and two arc-shaped structures are symmetrically arranged in the middle of the first cavity 4, forming a second cavity 3 that is recessed outward. This cavity design can effectively increase the elasticity of the fiber, improving the mechanical properties of the PEF fiber, making it stronger, softer, and more fluffy.

[0023] As a further improvement, the cross section of the PEF fiber body 1 is circular, and the side surface of the PEF fiber body 1 is provided with a plurality of grooves 5 which are arranged parallel to each other and have inwardly concave cross sections.

[0024] By forming a plurality of mutually parallel and inwardly recessed grooves 5 on the outer side of the circular PEF fiber body 1, not only the specific surface area of ​​the fiber is increased, but also the moisture absorption and dyeing properties are improved.

[0025] As a further improvement, the groove 5 is a V-shaped structure, and the V-shaped bottom of the groove 5 faces the center of the PEF fiber body 1.

[0026] When the grooves 5 are V-shaped and their bottoms are all positioned toward the center of the PEF fiber body 1, they do not affect the deformation resistance of the outer surface of the PEF fiber body 1, while also enhancing the strength of the PEF fiber body 1. Multiple V-shaped grooves 5 can form capillaries on the fiber surface, improving moisture absorption and permeability while also increasing pilling resistance and abrasion resistance, further enhancing moisture absorption and permeability, as well as pilling resistance and abrasion resistance.

[0027] Example 2:

[0028] On the basis of Example 1, it is further improved as follows: Figure 2 As shown, a third cavity 6 is transversely provided at one end of the first cavity 4 , and the first cavity 4 and the third cavity 6 are arranged in a “T” shape.

[0029] Compared with the "I"-shaped special-shaped cavity 2, the T-shaped special-shaped cavity structure has more uniform elasticity and can ensure a certain density, which can not only improve the shortcomings of PEF fiber in mechanical properties and make it stronger, but also further improve its softness and fluffiness.

[0030] Example 3:

[0031] On the basis of Example 1 or Example 2, it is further improved as follows: Figure 3 As shown, third cavities 6 are transversely provided at both ends of the first cavity 4 , and the first cavity 4 and the two third cavities 6 are arranged in an “H” shape.

[0032] Compared with the "I"-shaped and "T"-shaped special-shaped cavities 2, the special-shaped cavity 2 adopts the "H"-shaped structure design, which can more effectively increase the elasticity of the fiber, improve the shortcomings of the mechanical properties of the PEF fiber itself, and improve the shortcomings of the mechanical properties of the PEF fiber itself, making it stronger, softer and more fluffier.

[0033] In the actual production process, the number, depth and width of the V-shaped grooves 5, as well as the shape and size of the special-shaped hole structure can be adjusted as needed to obtain PEF fibers with different performance characteristics.

[0034] The above-mentioned embodiments are only preferred embodiments of the present application and cannot be used to limit the scope of protection of the present application. Any non-substantial changes and replacements made by technicians in this field based on the present application shall fall within the scope of protection required by the present application.

Claims

1. A special-shaped bio-based 2,5-furandicarboxylic acid polyester fiber, characterized by: The invention comprises a PEF fiber body (1), wherein a special-shaped cavity (2) is provided in the middle of the PEF fiber body (1), wherein the special-shaped cavity (2) comprises a first cavity (4) arranged in a straight line shape, and two second cavities (3) symmetrically arranged in the middle of the first cavity (4), wherein the second cavity (3) is arranged in an arc-shaped structure and is concave outward.

2. The heteromorphic bio-based 2,5-furandicarboxylic acid polyester fiber according to claim 1, characterized in that: The cross section of the PEF fiber body (1) is circular, and the side surface of the PEF fiber body (1) is provided with a plurality of grooves (5) arranged parallel to each other and having inwardly concave cross sections.

3. The heteromorphic bio-based 2,5-furandicarboxylic acid polyester fiber according to claim 2, characterized in that: The groove (5) is a V-shaped structure, and the V-shaped bottom of the groove (5) is oriented toward the center of the PEF fiber body (1).

4. The heteromorphic bio-based 2,5-furandicarboxylic acid polyester fiber according to claim 1, characterized in that: A third cavity (6) is transversely disposed at one end of the first cavity (4), and the first cavity (4) and the third cavity (6) are arranged in a "T" shape.

5. The heteromorphic bio-based 2,5-furandicarboxylic acid polyester fiber according to any one of claims 1 to 4, characterized in that: A third cavity (6) is transversely provided at both ends of the first cavity (4), and the first cavity (4) and the two third cavities (6) are arranged in an "H" shape.

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