Manufacturing method of metal hook-and-loop fastener used in specific high-temperature environment and corrosion environment

Abstract

The invention discloses a manufacturing method of a metal magic tape used in a specific high-temperature environment and a corrosion environment. The manufacturing method comprises the following steps: S1, preparing an initial composite wire raw material; s2, reducing and drawing; s3, twisting is carried out; s4, performing high-temperature shaping and soft annealing; s5, electrochemical separation; s6, preparing a semi-finished product of a blank belt of the metal magic tape; and S7, preparing a finished product of the metal magic tape. The metal magic tape (magic tape) is prepared by proportionally interweaving synthetic metal and 316L main body materials through warp yarns, weft yarns and surface yarns, can resist high temperature of over 1000 DEG C, has the characteristics of permanent flame-retardant function, high temperature resistance and corrosion resistance, can continuously and normally work, meets the ultra-high-temperature use requirement, can be quickly buckled and fixed without welding, and has the advantages of simple structure, low cost and the like. And quick disassembly can be realized.

Description

Technical Field

[0001] This invention belongs to the field of hook and loop fastener (Vessel fastener) production technology, specifically relating to a method for manufacturing metal hook and loop fasteners used in specific high-temperature and corrosive environments. Background Technology

[0002] Hook and loop fasteners, also known as Velcro or snap fasteners (they make a squeaking sound when pulled, functioning like buttons), have a male and female side. Currently, the main types of hook and loop fasteners (Velcro) are as follows: 1. Flame-retardant hook and loop fasteners made of polyester filament or nylon filament or a combination of polyester filament will melt when exposed to an open flame, accompanied by black smoke and a pungent smell; they will soften at 180°C and melt at 260°C, failing to meet the requirements for temperature resistance and corrosion resistance.

[0003] 2. Aramid hook and loop fasteners: Due to manufacturing limitations, aramid yarn is used in aramid hook and loop fasteners, and its temperature resistance is only around 260℃. It will automatically carbonize above 500℃. Therefore, it cannot be used in higher temperature environments.

[0004] 3. Existing PPS long-filament hook and loop fasteners have insufficient temperature resistance. At around 180℃, the adhesive coating is still present, and the high temperature will cause them to catch fire and carbonize. They cannot be used in ultra-high temperature environments.

[0005] Therefore, it is of great significance to develop hook and loop fasteners (Vessel fasteners) that are of higher quality and can withstand higher temperatures and corrosive environments. Summary of the Invention

[0006] To solve the above-mentioned technical problems, this invention provides a method for manufacturing metal hook and loop fasteners that are resistant to high temperatures and corrosion and can be used in specific high-temperature and corrosive environments.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a method for manufacturing metal hook and loop fasteners for use in specific high-temperature and corrosive environments, comprising the following steps: S1. Initial preparation of raw materials for composite wire; S2, diameter reduction drawing; S3, twisting; S4. High-temperature setting and soft annealing; S5, electrochemical separation; S6. Preparation of semi-finished metal hook and loop fastener blanks; S7. Produce the finished metal hook and loop fastener.

[0008] Further, the specific process of step S1 is as follows: First, prepare metal wires, embed the metal wires into the base material and bundle them into a bundle, and then encapsulate them to obtain the initial composite wire; the base material is the material applied to each metal wire for the wire bundle pulling process, including copper, iron, copper alloy or iron alloy.

[0009] Furthermore, the specific process of step S2 is as follows: the initial composite wire is drawn using the wire harness drawing method to obtain the finished composite wire with the required wire diameter.

[0010] Furthermore, the specific process of step S3 is as follows: the finished composite wire obtained in step S2 is twisted.

[0011] Furthermore, the specific process of step S4 is as follows: the finished composite wire after twisting in step S3 is heated at high temperature to set its shape; through a process of heating to a specific temperature and holding it at that temperature followed by slow cooling, i.e., soft annealing, the metal wire obtains a soft (low hardness, high plasticity) microstructure to improve its ductility and flexibility.

[0012] Furthermore, the specific process of step S5 is as follows: the finished composite wire after high-temperature setting in step S4 is separated by an electrochemical separation method to obtain metal fiber strand raw material, which is then made into filaments. The first type is filaments with a linear density of 700D-900D, the second type is filaments with a linear density of 800D-1000D, and the third type is filaments with a linear density of 300D-400D. The raw material is synthetic metal, 316L main material, and the single fiber breaking strength of the filament is ≥19N.

[0013] Further, the specific process of step S6 is as follows: the three specifications of filaments obtained in step S5 are used as warp yarns, weft yarns and face yarns respectively; among them, filaments with a linear density of 700D-900D are used as warp yarns, filaments with a linear density of 800D-1000D are used as weft yarns, and filaments with a linear density of 300-400D are used as face yarns. The warp yarns, weft yarns and face yarns are woven in a ribbon loom to weave semi-finished metal hook and loop fastener blanks with hook and loop surfaces respectively.

[0014] Furthermore, step S7 specifically includes the following sub-steps: S7-1. Clean and degrease the semi-finished metal hook and loop fastener blanks on the hook side and the rough side. S7-2. After completing step S7-1, apply coating and shape, then dry and shape at 100-160℃. S7-3. After step S7-2 is completed, the hook-faced strip is cut into hooks with openings; the rough-faced strip is packaged directly after shaping. S7-4. After step S7-3, the product undergoes a second heat treatment at 400-1000℃ for 2-5 hours. Finally, it is cooled to complete the final metal hook and loop fastener product.

[0015] Furthermore, in step S6, the rough surface height of the semi-finished metal hook and loop fastener blank is 1.8-2.6mm, the hook surface height is 1.5-2.4mm, the peel strength is ≥3N / CM, and the tensile strength is ≥16N / CM².

[0016] By adopting the above technical solution, compared with the prior art, the present invention has the following technical effects: This invention utilizes synthetic metal and 316L stainless steel as the main material, interwoven with warp, weft, and face yarns in a specific ratio to create a metal hook and loop fastener (Velcro). It withstands temperatures exceeding 1000 degrees Celsius, possesses permanent flame-retardant properties, and exhibits high-temperature and corrosion resistance, allowing for continuous normal operation and meeting ultra-high-temperature usage requirements. This invention can be applied to nuclear power equipment assembly, nuclear power facility insulation components, aircraft engine assembly, steam turbine insulation, rapid assembly and fixing in corrosive environments, and rapid assembly and fixing in thermal pipelines and petrochemical insulation applications requiring temperatures exceeding 400 degrees Celsius. It allows for quick fastening and disassembly without welding. Detailed Implementation

[0017] The following examples provide a further detailed description of the implementation methods of the present invention.

[0018] The present invention provides a method for manufacturing metal hook and loop fasteners for use in specific high-temperature and corrosive environments, comprising the following steps: S1. Initial preparation of raw materials for composite wire; S2, diameter reduction drawing; S3, twisting; S4. High-temperature setting and soft annealing; S5, electrochemical separation; S6. Preparation of semi-finished metal hook and loop fastener blanks; S7. Produce the finished metal hook and loop fastener.

[0019] The specific process of step S1 is as follows: First, prepare metal wires, embed the metal wires into the base material and bundle them into a bundle, and then encapsulate them to obtain the initial composite wire; the base material is the material applied to each metal wire for the wire bundle pulling process, including copper, iron, copper alloy or iron alloy.

[0020] The specific process of step S2 is as follows: the initial composite wire is drawn using the wire harness drawing method to obtain the finished composite wire with the required wire diameter.

[0021] The specific process of step S3 is as follows: Twist the finished composite wire obtained in step S2.

[0022] The specific process of step S4 is as follows: the finished composite wire after twisting in step S3 is heated at high temperature to set its shape; through the process of heating to a specific temperature and holding it at that temperature and then slowly cooling it, i.e. soft annealing, the metal wire obtains a soft (low hardness, high plasticity) structure to improve its ductility and flexibility.

[0023] The specific process of step S5 is as follows: The finished composite wire after high-temperature setting in step S4 is separated by an electrochemical separation method to obtain metal fiber strand raw material, which is then made into filaments. The first type is filament with a linear density of 700D-900D, the second type is filament with a linear density of 800D-1000D, and the third type is filament with a linear density of 300D-400D. The raw material is synthetic metal, 316L main material, and the single fiber breaking strength of the filament is ≥19N.

[0024] The specific process of step S6 is as follows: The three specifications of filaments obtained in step S5 are used as warp yarns, weft yarns and face yarns respectively; among them, filaments with a linear density of 700D-900D are used as warp yarns, filaments with a linear density of 800D-1000D are used as weft yarns, and filaments with a linear density of 300-400D are used as face yarns. The warp yarns, weft yarns and face yarns are woven in a ribbon loom to produce semi-finished metal hook and loop fastener blanks with hook and loop surfaces respectively.

[0025] Step S7 specifically includes the following sub-steps: S7-1. Clean and degrease the semi-finished metal hook and loop fastener blanks on the hook side and the rough side. S7-2. After completing step S7-1, apply coating and shape, then dry and shape at 100-160℃. S7-3. After step S7-2 is completed, the hook-faced strip is cut into hooks with openings; the rough-faced strip is packaged directly after shaping. S7-4. After step S7-3, the product undergoes a second heat treatment at 400-1000℃ for 2-5 hours. Finally, it is cooled to complete the final metal hook and loop fastener product.

[0026] In step S6, the rough surface height of the semi-finished metal hook and loop fastener blank is 1.8-2.6mm, the hook surface height is 1.5-2.4mm, the peel strength is ≥3N / CM, and the tensile strength is ≥16N / CM².

[0027] The finished metal hook and loop fasteners were tested for tensile strength and peel strength using conventional methods. The results are shown in the table below:

[0028] The above embodiments illustrate the basic principles and features of the present invention, but are merely preferred embodiments and are not limited to these embodiments. Those skilled in the art, inspired by this patent, can make many modifications and improvements without departing from the spirit and scope of the claims, all of which fall within the scope of protection of the present invention. Therefore, the scope of this patent and its protection should be determined by the appended claims.

Claims

1. A method for manufacturing metal hook and loop fasteners for use in specific high-temperature and corrosive environments, characterized in that: Includes the following steps: S1. Initial preparation of raw materials for composite wire; S2, diameter reduction drawing; S3, twisting; S4. High-temperature setting and soft annealing; S5, electrochemical separation; S6. Preparation of semi-finished metal hook and loop fastener blanks; S7. Produce the finished metal hook and loop fastener.

2. The method for manufacturing metal hook and loop fasteners for use in specific high-temperature and corrosive environments according to claim 1, characterized in that: The specific process of step S1 is as follows: First, prepare metal wires, embed the metal wires into the base material and bundle them into a bundle, and then encapsulate them to obtain the initial composite wire; the base material is the material applied to each metal wire for the wire bundle pulling process, including copper, iron, copper alloy or iron alloy.

3. The method for manufacturing metal hook and loop fasteners for use in specific high-temperature and corrosive environments according to claim 2, characterized in that: The specific process of step S2 is as follows: the initial composite wire is drawn using the wire harness drawing method to obtain the finished composite wire with the required wire diameter.

4. The method for manufacturing metal hook and loop fasteners for use in specific high-temperature and corrosive environments according to claim 3, characterized in that: The specific process of step S3 is as follows: Twist the finished composite wire obtained in step S2.

5. The method for manufacturing metal hook and loop fasteners for use in specific high-temperature and corrosive environments according to claim 4, characterized in that: The specific process of step S4 is as follows: the finished composite wire after twisting in step S3 is heated at high temperature to set its shape; through the process of heating to a specific temperature and holding it at that temperature and then slowly cooling it, i.e. soft annealing, the metal wire obtains a soft (low hardness, high plasticity) structure to improve its ductility and flexibility.

6. The method for manufacturing metal hook and loop fasteners for use in specific high-temperature and corrosive environments according to claim 5, characterized in that: The specific process of step S5 is as follows: The finished composite wire after high-temperature setting in step S4 is separated by an electrochemical separation method to obtain metal fiber strand raw material, which is then made into filaments. The first type is filament with a linear density of 700D-900D, the second type is filament with a linear density of 800D-1000D, and the third type is filament with a linear density of 300D-400D. The raw material is synthetic metal, 316L main material, and the single fiber breaking strength of the filament is ≥19N.

7. The method for manufacturing metal hook and loop fasteners for use in specific high-temperature and corrosive environments according to claim 6, characterized in that: The specific process of step S6 is as follows: The three specifications of filaments obtained in step S5 are used as warp yarns, weft yarns and face yarns respectively; among them, filaments with a linear density of 700D-900D are used as warp yarns, filaments with a linear density of 800D-1000D are used as weft yarns, and filaments with a linear density of 300-400D are used as face yarns. The warp yarns, weft yarns and face yarns are woven in a ribbon loom to produce semi-finished metal hook and loop fastener blanks with hook and loop surfaces respectively.

8. The method for manufacturing metal hook and loop fasteners for use in specific high-temperature and corrosive environments according to claim 7, characterized in that: Step S7 specifically includes the following sub-steps: S7-1. Clean and degrease the semi-finished metal hook and loop fastener blanks on the hook side and the rough side. S7-2. After completing step S7-1, apply coating and shape, then dry and shape at 100-160℃. S7-3. After step S7-2 is completed, the hook-faced strip is cut into hooks with openings; the rough-faced strip is packaged directly after shaping. S7-4. After step S7-3, the product undergoes a second heat treatment at 400-1000℃ for 2-5 hours. Finally, it is cooled to complete the final metal hook and loop fastener product.

9. The method for manufacturing metal hook and loop fasteners for use in specific high-temperature and corrosive environments according to claim 7, characterized in that: In step S6, the rough surface height of the semi-finished metal hook and loop fastener blank is 1.8-2.6mm, the hook surface height is 1.5-2.4mm, the peel strength is ≥3N / CM, and the tensile strength is ≥16N / CM².

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