Filament high-strength polyester sewing thread processing method

Abstract

The invention relates to the technical field of filament high-strength polyester sewing thread processing, and discloses a filament high-strength polyester sewing thread processing method, which comprises the following steps: threading, positioning and guiding filaments and fiber bundles, fixing the filaments and the fiber bundles, doubling and drafting, doubling and mixing, intermittently twisting, heating and shaping, uniformly dyeing and ventilating and drying. Through the processing method, the strength of the sewing thread can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of filament high-strength polyester sewing thread processing, and specifically relates to a filament high-strength polyester sewing thread processing method. Background Art

[0002] Polyester sewing thread is made of synthetic plastic fiber made of polyester. It has the advantages of high strength, good wear resistance, low shrinkage, good moisture absorption and heat resistance, corrosion resistance, not easy to mildew and rot, and will not be eaten by insects. These characteristics make polyester sewing thread widely used in the sewing of cotton fabrics, chemical fibers and blended fabrics. With the advancement of polyester fiber supporting equipment technology and the continuous optimization of polyester technology, the production efficiency of polyester sewing thread is also gradually improving, meeting the needs of the textile industry. Although polyester sewing thread already has many advantages, its strength still needs to be further improved in practical applications. As consumers' requirements for clothing quality and appearance continue to increase, the quality requirements for sewing threads are also constantly increasing. Improving the strength of polyester sewing thread can meet consumers' demand for high-quality clothing and enhance the market competitiveness of products. In addition, in certain specific application scenarios, such as footwear, professional clothing, leather furniture, etc., polyester sewing thread needs to withstand greater tension and pressure. Increasing the strength can ensure the stability and durability of the sewing thread in these application scenarios, reduce thread breakage and thread changes, and improve sewing efficiency.

[0003] Therefore, we propose a method for processing filament high-strength polyester sewing thread. Summary of the invention

[0004] The purpose of the present invention is to provide a method for processing filament high-strength polyester sewing thread in order to improve the strength of the sewing thread.

[0005] The technical solution adopted by the present invention is as follows: A method for processing filament high-strength polyester sewing thread, the processing method comprising the following steps: S1: The threading positioning guide of the filaments and fiber bundles is used to first determine the threading path and position of the filaments and fiber bundles using a guide device or a positioning fixture. Then the filaments and fiber bundles pass through the predetermined holes, guide wheels and fixtures one by one. During the threading process, the tension of the filaments and fiber bundles needs to be kept moderate to avoid excessive stretching or relaxation; S2: Fixing of filaments and fiber bundles. After threading, the filaments and fiber bundles are fixed with clamping devices or adhesives to prevent them from moving or shifting during subsequent processing. It is also necessary to check whether the filaments and fiber bundles are threaded according to the predetermined path and position, whether they are firmly fixed, and whether there are any abnormalities or defects. S3: Drawing and drawing, combining multiple filaments or fiber bundles together so that the thick and thin segments of different strips can be randomly overlapped, improving the unevenness of the long segments of the fiber assembly and improving the overall uniformity. Then, the roller drawing mechanical device is used to draw and thin the combined filaments or fiber bundles so that the fibers can be parallel and straightened, and the fiber bundles are separated into single fibers to improve the straightening and parallelism of the fibers. S4: Blending and mixing. Through multiple merging of the merging equipment, fibers with different properties are fully mixed to prevent "color difference" and ensure uniform mixing of the number of fibers on the yarn cross section. S5: intermittent twisting, placing the filaments and fiber bundles that have been wired together in the twisting device, and starting the device to twist. During the twisting process, the filaments and fiber bundles will be subjected to circumferential twisting loads, so that the fibers are entangled and tightly combined, and the twisting speed, torque value and twisting angle are well controlled. After the twisting reaches a certain degree, it is necessary to temporarily stop the twisting, and allow the filaments and fiber bundles to release stress to a certain extent, and then repeat the above twisting and releasing steps to form an intermittent twisting process. Through multiple twisting and releasing, the combination between the filaments and fiber bundles will be tighter, and the arrangement of the fibers will be more orderly; S6: Heating and setting. The intermittently twisted fiber is placed in a heat setting machine for heating, and the heating temperature and heating time are controlled to ensure that the fiber can be heated evenly and achieve the desired heat setting effect. While heating, the fiber is stretched to achieve the desired size and shape. After stretching, the fiber is immediately cooled to reduce its temperature to below the glass transition temperature of the fiber, thereby fixing its shape and size to form a sewing thread; S7: Even dyeing: put the shaped sewing thread into the dye solution, make sure the thread is completely immersed in the dye, and stir gently during the dyeing process to ensure that the dye is evenly distributed; S8: Ventilation and drying: Place the dyed sewing thread in a well-ventilated place to dry, avoid direct sunlight exposure to prevent the color of the thread from fading or deteriorating. During the drying process, you can gently wring out excess water, but avoid rubbing it hard to avoid damaging the texture of the thread.

[0006] In a preferred embodiment of the invention, the clamping device is a binding belt.

[0007] In a preferred embodiment of the invention, the number of filaments and fiber bundles in the parallel yarn is 6 to 8.

[0008] In a preferred embodiment of the invention, the combining device is a drawing frame.

[0009] In a preferred embodiment of the invention, the twisting speed is 0.1 to 100 degrees / minute, the torque value is 4.0 to 7.5 N·m, and the twisting angle is ±180 degrees.

[0010] In a preferred embodiment of the invention, the filaments are polyester filaments, and the fiber bundles are cotton fiber bundles.

[0011] In a preferred embodiment of the invention, the heating and setting temperature is 180-210° C., and the heating time is 20-30 seconds.

[0012] In a preferred embodiment of the invention, the cooling method is any one of cold air, cold water or natural cooling.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, the filaments and fiber bundles are positioned, guided and fixed to avoid displacement or dislocation of the fibers in subsequent processing, thereby ensuring the uniformity and consistency of the sewing thread. Then, the strands are drawn out and thinned by parallel yarn drawing to make the fibers parallel and straight, and the fiber bundles are separated into single fibers, thereby improving the fineness and uniformity of the sewing thread and enhancing the cohesion between the fibers, thereby improving the strength of the sewing thread.

[0014] 2. In the present invention, the yarn blending can evenly mix fibers of different properties or colors, so that the sewing thread has better color and performance, makes up for the shortcomings of a single fiber, and improves the strength of the sewing thread. Then, intermittent torsion is used to increase the twist and elasticity of the sewing thread, making it more wear-resistant and break-resistant during use, and making the surface of the sewing thread smoother, reducing friction with the fabric, thereby improving the strength and quality of the sewing thread.

[0015] 3. In the present invention, the internal stress accumulated in the fabric is eliminated through heat setting treatment, so that the size and shape of the fabric are stabilized and it is not easy to produce creases that are difficult to remove, thereby improving the dimensional stability of the sewing thread during processing and use. During the heat setting process, the fiber molecular chains are reoriented and arranged, making the fiber structure tighter, thereby improving the strength of the sewing thread. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a processing flow chart of the filament high-strength polyester sewing thread. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The following will be combined Figure 1 A method for processing a filament high-strength polyester sewing thread according to an embodiment of the present invention is described in detail. Example

[0019] Reference Figure 1 , a method for processing filament high-strength polyester sewing thread, the processing method steps are: firstly thread the filaments and fiber bundles through a positioning guide, use a guide device or a positioning fixture to first determine the threading path and position of the filaments and fiber bundles, and then the filaments and fiber bundles pass through the predetermined holes, guide wheels and fixtures one by one. During the threading process, it is necessary to maintain moderate tension of the filaments and fiber bundles to avoid excessive stretching or relaxation; the filaments are polyester filaments, and the fiber bundles are cotton fiber bundles. Then the filaments and fiber bundles are fixed. After the threading is completed, the filaments and fiber bundles are fixed by a clamping device or an adhesive to prevent them from moving or deviating during subsequent processing. The clamping device is a binding tape, and it is checked whether the filaments and fiber bundles are threaded according to the predetermined path and position, whether they are firmly fixed, and whether there are any abnormalities or defects.‌ ‌; Finally, the yarn drawing is performed to combine multiple filaments or fiber bundles together so that the thick and thin segments of different strips can be randomly overlapped, thereby improving the unevenness of the long segments of the fiber aggregate and improving the overall uniformity. The combined filaments or fiber bundles are then stretched and thinned by a roller stretching mechanism to make the fibers parallel and straight, and the fiber bundles are separated into single fibers, thereby improving the straightening and parallelism of the fibers. Specifically, the filaments and fiber bundles are positioned, guided and fixed to avoid displacement or misalignment of the fibers in subsequent processing, thereby ensuring the uniformity and consistency of the sewing thread. The slivers are then stretched and thinned by yarn drawing to make the fibers parallel and straight, and the fiber bundles are separated into single fibers, thereby improving the fineness and uniformity of the sewing thread and enhancing the cohesion between the fibers, thereby improving the strength of the sewing thread.

[0020] Reference Figure 1, the number of filaments and fiber bundles during the yarn drawing is 6 to 8, and the fibers with different properties are fully mixed through multiple drawing of the drawing equipment, which is a drawing frame, to prevent "color difference" and ensure uniform mixing of the number of fibers on the yarn cross section; then intermittent twisting, the drawn filaments and fiber bundles are placed in the twisting equipment, and the equipment is started to twist. During the twisting process, the filaments and fiber bundles will be subjected to circumferential twisting loads, so that the fibers are entangled with each other and tightly combined, and the twisting speed, torque value and twisting angle are controlled. After the twisting reaches a certain degree, the twisting needs to be temporarily stopped, and the filaments and fiber bundles are allowed to release stress to a certain extent, and then the above twisting and release are repeated. The steps of releasing the yarn are performed to form an intermittent twisting process. Through multiple twisting and releasing, the combination of the filaments and the fiber bundles will be tighter, and the arrangement of the fibers will be more orderly. The twisting speed is 0.1 to 100 degrees / minute, the torque value is 4.0 to 7.5 N·m, and the twisting angle is ±180 degrees. Specifically, the yarn mixing can evenly mix fibers of different properties or colors, so that the sewing thread has better color and performance, makes up for the shortcomings of a single fiber, and improves the strength of the sewing thread. Then, intermittent twisting is used to increase the twist and elasticity of the sewing thread, making it more wear-resistant and fracture-resistant during use, and making the surface of the sewing thread smoother, reducing friction with the fabric, thereby improving the strength and quality of the sewing thread.

[0021] Reference Figure 1 , heat setting, place the intermittently twisted fiber in a heat setting machine for heating, and control the heating temperature and heating time to ensure that the fiber can be evenly heated and achieve the desired heat setting effect. While heating, stretch the fiber to achieve the desired size and shape. After stretching, immediately cool the fiber to reduce its temperature below the glass transition temperature of the fiber to fix its shape and size to form a sewing thread; the cooling method is any one of cold air, cold water or natural cooling; uniform dyeing, put the shaped sewing thread into the dye solution, ensure that the thread is completely immersed in the dye, and gently stir during the dyeing process to ensure that the dye is evenly distributed; ventilation and drying Drying: Place the dyed sewing thread in a well-ventilated place to dry, avoid direct sunlight exposure to prevent the color of the thread from fading or deterioration. During the drying process, you can gently wring out excess water, but avoid rubbing it hard to avoid damaging the texture of the thread. The temperature for heating and setting is 180-210°C, and the heating time is 20-30 seconds. Specifically, through heat setting treatment, the internal stress accumulated inside the fabric is eliminated, the size and shape of the fabric are stabilized, and it is not easy to produce difficult-to-remove creases, thereby improving the dimensional stability of the sewing thread during processing and use. During the heat setting process, the fiber molecular chains are reoriented and arranged, making the fiber structure tighter, thereby improving the strength of the sewing thread.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0023] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for processing filament high-strength polyester sewing thread, characterized in that: The processing method steps are: S1: The threading positioning guide of the filaments and fiber bundles is used to first determine the threading path and position of the filaments and fiber bundles using a guide device or a positioning fixture. Then the filaments and fiber bundles pass through the predetermined holes, guide wheels and fixtures one by one. During the threading process, the tension of the filaments and fiber bundles needs to be kept moderate to avoid excessive stretching or relaxation; S2: Fixing of filaments and fiber bundles. After threading, the filaments and fiber bundles are fixed with clamping devices or adhesives to prevent them from moving or shifting during subsequent processing. It is also necessary to check whether the filaments and fiber bundles are threaded according to the predetermined path and position, whether they are firmly fixed, and whether there are any abnormalities or defects. S3: Drawing and drawing, combining multiple filaments or fiber bundles together so that the thick and thin segments of different strips can be randomly overlapped, improving the unevenness of the long segments of the fiber assembly and improving the overall uniformity. Then, the roller drawing mechanical device is used to draw and thin the combined filaments or fiber bundles so that the fibers can be parallel and straightened, and the fiber bundles are separated into single fibers to improve the straightening and parallelism of the fibers. S4: Blending and mixing. Through multiple merging of the merging equipment, fibers with different properties are fully mixed to prevent "color difference" and ensure uniform mixing of the number of fibers on the yarn cross section. S5: intermittent twisting, placing the filaments and fiber bundles that have been wired together in the twisting device, and starting the device to twist. During the twisting process, the filaments and fiber bundles will be subjected to circumferential twisting loads, so that the fibers are entangled and tightly combined, and the twisting speed, torque value and twisting angle are well controlled. After the twisting reaches a certain degree, it is necessary to temporarily stop the twisting, and allow the filaments and fiber bundles to release stress to a certain extent, and then repeat the above twisting and releasing steps to form an intermittent twisting process. Through multiple twisting and releasing, the combination between the filaments and fiber bundles will be tighter, and the arrangement of the fibers will be more orderly; S6: Heating and setting. The intermittently twisted fiber is placed in a heat setting machine for heating, and the heating temperature and heating time are controlled to ensure that the fiber can be heated evenly and achieve the desired heat setting effect. While heating, the fiber is stretched to achieve the desired size and shape. After stretching, the fiber is immediately cooled to reduce its temperature to below the glass transition temperature of the fiber, thereby fixing its shape and size to form a sewing thread; S7: Even dyeing: put the shaped sewing thread into the dye solution, make sure the thread is completely immersed in the dye, and stir gently during the dyeing process to ensure that the dye is evenly distributed; S8: Ventilate and dry. Place the dyed sewing thread in a well-ventilated place to dry. Avoid direct sunlight exposure to prevent the color of the thread from fading or deteriorating. During the drying process, you can gently wring out excess water, but avoid rubbing it hard to avoid damaging the texture of the thread.

2. The method for processing filament high-strength polyester sewing thread according to claim 1, characterized in that: The clamping device is a binding strap.

3. The method for processing a filament high-strength polyester sewing thread according to claim 1, characterized in that: The number of filaments and fiber bundles during the parallel spinning is 6 to 8.

4. A method for processing filament high-strength polyester sewing thread as claimed in claim 1, characterized in that: The combining device is a drawing frame.

5. The method for processing a filament high-strength polyester sewing thread according to claim 1, characterized in that: The twisting speed is 0.1 to 100 degrees / minute, the torque value is 4.0 to 7.5 N·m, and the twisting angle is ±180 degrees.

6. A method for processing filament high-strength polyester sewing thread as claimed in claim 1, characterized in that: The filaments are polyester filaments, and the fiber bundles are cotton fiber bundles.

7. A method for processing filament high-strength polyester sewing thread as claimed in claim 1, characterized in that: The heating temperature is 180-210° C., and the heating time is 20-30 seconds.

8. The method for processing a filament high-strength polyester sewing thread according to claim 1, characterized in that: The cooling method is any one of cold air, cold water or natural cooling.

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