Low-temperature high-strength yarn and preparation method thereof

Abstract

The invention relates to the field of yarn preparation, in particular to low-temperature high-strength yarn and a preparation method thereof. The preparation method of the low-temperature high-strength yarn comprises the following steps: step 1, increasing the surface temperature of a low-temperature material serving as an inner core, winding the low-temperature material serving as the inner core through a winding structure, and slowly and continuously increasing the surface temperature value of the low-temperature material, the temperature value of the surface of the heated low-temperature material is greater than the initial temperature value of the surface of the low-temperature material before winding; and 2, the surface of the inner core is wrapped with a wrapping layer, the slice material wrapping the surface of the low-temperature material is melted and wraps the outer surface of the low-temperature material in an extrusion mode, the low-temperature high-strength yarn is formed after wrapping, and the melting point of the slice material is larger than that of the low-temperature material. By optimizing the preparation method of the low-temperature high-strength yarn, the yarn with the melting point of the inner core smaller than the melting point of the coating layer can be prepared, the physical and chemical properties of yarn fibers cannot be damaged, and normal yarn output during preparation can be guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of yarn preparation, and in particular to a low-temperature high-strength yarn and a preparation method thereof. Background Art

[0002] The yarns produced by the traditional yarn preparation method have a yarn structure in which the inside is high-temperature yarn and the outside is low-temperature yarn, that is, the melting point of the external material is lower than that of the internal material. The preparation method using the traditional yarn preparation method is not suitable for preparing yarns with a yarn structure of low-temperature yarn inside and high-temperature yarn outside. For example, the melting point of ultra-high molecular weight polyethylene coated on the outer layer is about 130°C. When the traditional yarn preparation method is used for preparation, it is found that during the coating process of ultra-high molecular weight polyethylene, the ultra-high molecular weight polyethylene is easy to melt directly, and the coating work cannot be completed very quickly, so it is impossible to produce yarns with low-temperature yarn inside and high-temperature yarn outside. Summary of the invention

[0003] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description and other drawings of the description.

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a low-temperature high-strength yarn and a preparation method thereof.

[0005] To achieve the above purpose, the technical solution of the present invention is:

[0006] In a first aspect, the present invention provides a method for preparing a low-temperature high-strength yarn, comprising the following steps:

[0007] Step 1: Raise the surface temperature of the low-temperature material as the inner core, firstly wind the low-temperature material as the inner core through the winding structure, slowly and continuously raise the surface temperature of the low-temperature material, and the temperature of the surface of the low-temperature material after heating is greater than the initial temperature of the surface of the low-temperature material before winding;

[0008] Step 2: Wrap a coating layer on the surface of the inner core, melt the sliced ​​material covering the surface of the low-temperature material, and extrude it to cover the outer surface of the low-temperature material. After wrapping, output it to form a low-temperature high-strength yarn. The melting point of the sliced ​​material is greater than the melting point of the low-temperature material.

[0009] In some embodiments, the low temperature material is a low temperature yarn or a low temperature monofilament.

[0010] In some embodiments, the slice material is polyester elastic, polyvinyl chloride, polypropylene, thermoplastic polyurethane elastomer or nylon.

[0011] In some embodiments, the step three is also included: winding after oiling, the low-temperature high-strength yarn is simultaneously oiled after extrusion, and then the low-temperature high-strength yarn is wound.

[0012] In a second aspect, the present invention provides a low-temperature high-strength yarn, which is prepared by the method for preparing the low-temperature high-strength yarn in the first invention.

[0013] In some embodiments, the low temperature high strength yarn includes an inner core and a covering layer.

[0014] In some embodiments, the inner core is a low temperature yarn or a low temperature monofilament.

[0015] In some embodiments, the covering layer is a polyester elastic layer, a polyvinyl chloride layer, a polypropylene layer, a thermoplastic polyurethane elastomer layer, or a nylon layer.

[0016] In some embodiments, the melting point of the core is less than the melting point of the cladding.

[0017] In some embodiments, the low temperature high strength yarn is a sheath-core structure.

[0018] By adopting the above technical solution, the beneficial effects of the present invention are:

[0019] 1. The present invention optimizes the preparation method of low-temperature high-strength yarn, so that the yarn with the inner core melting point lower than the melting point of the coating layer can be produced, which will not destroy the physical and chemical properties of the yarn fiber and can ensure normal silk output during preparation.

[0020] 2. When the inner core of the yarn prepared by the preparation method of the present invention is a monofilament, the wire diameter is more stable and the roundness is higher after coating, and the weaving effect is good; when the inner core is a finished low-temperature yarn, the coating integrity is high, the yarn strength is high, and the weaving effect is good.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

[0022] Undoubtedly, these and other objects of the present invention will become more apparent after the following detailed description of the preferred embodiment described with reference to various figures and drawings.

[0023] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, one or several preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation of the present invention.

[0025] In the drawings, the same reference numerals are used for the same components and the drawings are schematic and not necessarily drawn to scale.

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only one or several embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on such drawings without paying creative work.

[0027] Figure 1 This is a simplified flow chart of the method for preparing low-temperature high-strength yarn in Example 1 of the present invention;

[0028] Figure 2 This is a simplified flow chart of the method for preparing low-temperature high-strength yarn in Example 2 of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the low-temperature high-strength yarn in Example 3 of the present invention.

[0030] Explanation of main reference numerals: 1. inner core; 2. coating layer. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but are not used to limit the present invention.

[0032] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through a transition structure, but are connected to form a whole through a connecting structure. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0035] According to some embodiments of the present invention, the present invention provides a method for preparing a low-temperature high-strength yarn, comprising the following steps:

[0036] Step 1: Raise the surface temperature of the low-temperature material as the inner core 1, firstly wind the low-temperature material as the inner core 1 through the winding structure, slowly and continuously raise the surface temperature of the low-temperature material, and the temperature of the surface of the low-temperature material after heating is greater than the initial temperature of the surface of the low-temperature material before winding;

[0037] Step 2: Wrap the coating layer 2 on the surface of the inner core 1, melt the sliced ​​material covering the surface of the low-temperature material, and extrude it to cover the outer surface of the low-temperature material. After wrapping, output it to form a low-temperature high-strength yarn. The melting point of the sliced ​​material is greater than the melting point of the low-temperature material.

[0038] According to some embodiments of the present invention, optionally, the low-temperature material is a low-temperature yarn or a low-temperature monofilament.

[0039] According to some embodiments of the present invention, optionally, the slice material is polyester elastic, polyvinyl chloride, polypropylene, thermoplastic polyurethane elastomer or nylon.

[0040] According to some embodiments of the present invention, optionally, step three is further included: winding after oiling, the low-temperature high-strength yarn is simultaneously oiled after extrusion, and then the low-temperature high-strength yarn is wound.

[0041] According to some embodiments of the present invention, the present invention provides a low-temperature high-strength yarn, which is prepared by the above-mentioned method for preparing the low-temperature high-strength yarn.

[0042] According to some embodiments of the present invention, optionally, the low-temperature high-strength yarn includes an inner core 1 and a covering layer 2 .

[0043] According to some embodiments of the present invention, optionally, the inner core 1 is a low-temperature yarn or a low-temperature monofilament.

[0044] According to some embodiments of the present invention, optionally, the covering layer 2 is a polyester elastic layer, a polyvinyl chloride layer, a polypropylene layer, a thermoplastic polyurethane elastomer layer or a nylon layer.

[0045] According to some embodiments of the present invention, optionally, the melting point of the inner core 1 is lower than the melting point of the cladding layer 2 .

[0046] According to some embodiments of the present invention, optionally, the low-temperature high-strength yarn is a sheath-core structure.

[0047] Example 1

[0048] Reference Figure 1 This embodiment provides a method for preparing a low-temperature high-strength yarn, comprising the following steps:

[0049] Step 1: Raise the surface temperature of the low-temperature material as the inner core 1, firstly wind the low-temperature material as the inner core 1 through the winding structure, slowly and continuously raise the surface temperature of the low-temperature material, and the temperature of the surface of the low-temperature material after heating is greater than the initial temperature of the surface of the low-temperature material before winding;

[0050] Step 2: Wrap the coating layer 2 on the surface of the inner core 1, melt the sliced ​​material covering the surface of the low-temperature material, and extrude it to cover the outer surface of the low-temperature material. After wrapping, output it to form a low-temperature high-strength yarn. The melting point of the sliced ​​material is greater than the melting point of the low-temperature material.

[0051] The low temperature material is low temperature yarn or low temperature monofilament.

[0052] The slice material is polyester elastomer, polyvinyl chloride, polypropylene, thermoplastic polyurethane elastomer or nylon.

[0053] Example 2

[0054] Reference Figure 2 This embodiment provides a method for preparing a low-temperature high-strength yarn, comprising the following steps:

[0055] Step 1: Raise the surface temperature of the low-temperature material as the inner core 1, firstly wind the low-temperature material as the inner core 1 through the winding structure, slowly and continuously raise the surface temperature of the low-temperature material, and the temperature of the surface of the low-temperature material after heating is greater than the initial temperature of the surface of the low-temperature material before winding;

[0056] Step 2: Wrap the coating layer 2 on the surface of the inner core 1, melt the sliced ​​material covering the surface of the low-temperature material, and coat it on the outer surface of the low-temperature material by extrusion, and output it after wrapping to form a low-temperature high-strength yarn, wherein the melting point of the sliced ​​material is greater than the melting point of the low-temperature material;

[0057] Step 3: Winding after oiling. After the low-temperature high-strength yarn is extruded, it is simultaneously oiled and then wound up.

[0058] The low temperature material is low temperature yarn or low temperature monofilament.

[0059] The slice material is polyester elastomer, polyvinyl chloride, polypropylene, thermoplastic polyurethane elastomer or nylon.

[0060] Example 3

[0061] Reference Figure 3 This embodiment provides a low-temperature high-strength yarn, which is made by the preparation method of the low-temperature high-strength yarn in embodiment 1 or embodiment 2. The low-temperature high-strength yarn includes an inner core 1 and a coating layer 2. The inner core 1 is a low-temperature yarn or a low-temperature monofilament, and the coating layer 2 is a polyester elastic layer, a polyvinyl chloride layer, a polypropylene layer, a thermoplastic polyurethane elastomer layer or a nylon layer. The melting point of the inner core 1 is lower than the melting point of the coating layer 2, and the low-temperature high-strength yarn is a skin-core structure.

[0062] The coating layer 2 may preferably be made of ultra-high molecular weight polyethylene, which has high strength, and is more than four times stronger than polyester yarn. Oiling is to prevent the yarns from sticking to each other.

[0063] It should be understood that the embodiments disclosed in the present invention are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features understood by ordinary technicians in the relevant field. It should also be understood that the terms used herein are only used for the purpose of describing specific embodiments and are not meant to be limiting.

[0064] The "embodiment" mentioned in the specification means that the specific features or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention. Therefore, the phrases or "embodiment" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0065] In addition, the described features or characteristics may be combined in one or more embodiments in any other suitable manner. In the above description, some specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of the embodiments of the present invention. However, those skilled in the relevant art will understand that the present invention can be implemented without one or more of the above specific details or can also be implemented using other methods, components, materials, etc.

Claims

1. A method for preparing low-temperature high-strength yarn, characterized in that: The following steps are involved: Step 1: Raise the surface temperature of the low-temperature material as the inner core, firstly wind the low-temperature material as the inner core through the winding structure, slowly and continuously raise the surface temperature of the low-temperature material, and the temperature of the surface of the low-temperature material after heating is greater than the initial temperature of the surface of the low-temperature material before winding; Step 2: Wrap a coating layer on the surface of the inner core, melt the sliced ​​material covering the surface of the low-temperature material, and extrude it to cover the outer surface of the low-temperature material. After wrapping, output it to form a low-temperature high-strength yarn. The melting point of the sliced ​​material is greater than the melting point of the low-temperature material.

2. The method for preparing low-temperature high-strength yarn according to claim 1, characterized in that: The low-temperature material is low-temperature yarn or low-temperature monofilament.

3. The method for preparing low-temperature high-strength yarn according to claim 1, characterized in that: The slice material is polyester elastic, polyvinyl chloride, polypropylene, thermoplastic polyurethane elastomer or nylon.

4. The method for preparing low-temperature high-strength yarn according to claim 1, characterized in that: The method also includes step three: winding up after oiling, wherein the low-temperature high-strength yarn is simultaneously subjected to oiling after being extruded, and then the low-temperature high-strength yarn is wound up.

5. A low-temperature high-strength yarn, characterized in that: The low-temperature high-strength yarn is made by the preparation method of the low-temperature high-strength yarn according to any one of claims 1 to 4.

6. The low-temperature high-strength yarn according to claim 5, characterized in that: The low-temperature high-strength yarn comprises an inner core and a covering layer.

7. The low-temperature high-strength yarn according to claim 6, characterized in that: The inner core is low-temperature yarn or low-temperature monofilament.

8. The low-temperature high-strength yarn according to claim 6, characterized in that: The coating layer is a polyester elastic layer, a polyvinyl chloride layer, a polypropylene layer, a thermoplastic polyurethane elastomer layer or a nylon layer.

9. The low-temperature high-strength yarn according to claim 6, characterized in that: The melting point of the inner core is lower than the melting point of the cladding layer.

10. The low-temperature high-strength yarn according to claim 6, characterized in that: The low-temperature high-strength yarn is a sheath-core structure.

Images