Method for improving warp-wise quality of low-dielectric glass fiber cloth

Abstract

The invention provides a method for improving the warp-wise quality of low-dielectric glass fiber cloth, which comprises the following steps of: backward movement of a straight reed: backward movement of the straight reed in front of a hairiness detector of a sizing machine by 10-30cm, and adjustment to a position 4-6cm away from a yarn pressing rod; the static electricity eliminator is installed at the position of an original straight reed, the working distance of the static electricity eliminator is adjusted to be 1 cm to 3 cm, and the static electricity neutralization strength is set; and optimizing process parameters, namely adjusting the creel tension, the sizing speed, the mud jacking pressure, the drying wheel temperature and the coiling speed of the sizing machine so as to reduce the warp defects and improve the yarn consistency. By adding the synergistic effect of the electrostatic eliminator and the backward movement of the straight reed, the problem of yarn winding caused by electrostatic adsorption or hairiness is remarkably reduced, so that the yarns are arranged more orderly, and the uniformity of finished cloth is improved. The method is not only suitable for production of low-dielectric glass fiber cloth, but also can be expanded to production processes of other high-performance fiber materials so as to realize dual control of hairiness and static electricity.

Description

Technical Field

[0001] The invention relates to the technical field of electronic-grade glass fiber cloth production, and in particular to a method for improving the warp quality of low-dielectric glass fiber cloth. Background Art

[0002] With the continuous advancement and development of science and technology, the demand for high-performance materials continues to increase. Low-dielectric glass fiber cloth is a key material. This material not only inherits the advantages of glass fiber such as insulation, heat resistance, corrosion resistance and high strength, but also has lower dielectric constant and dielectric loss, as well as lower density, wide bandwidth, high wave transmittance and other characteristics, making it particularly widely used in the electronic information industry. However, in the production process of low-dielectric glass fiber cloth, the problem of warp defects has always plagued manufacturers, affecting product quality and performance. Among them, excessive warp hairiness and static electricity problems are important factors leading to warp defects, which seriously affect the reliability and stability of low-dielectric cloth for 5G. Summary of the invention

[0003] The purpose of the present invention is to provide a method for improving the warp quality of low dielectric glass fiber cloth. By changing the production conditions of the sizing machine and adding equipment, the machine can effectively reduce the number of downtimes due to hairiness, eliminate static electricity, ensure the warp yarn sequence, and improve product quality.

[0004] According to one object of the present invention, the present invention provides a method for improving the warp quality of low dielectric glass fiber cloth, comprising the following steps:

[0005] Move the straight reed backward: Move the straight reed in front of the hairiness detector of the sizing machine backward by 10cm-30cm and adjust it to a position 4cm-6cm away from the yarn pressing rod;

[0006] Add static eliminator: install static eliminator at the original reed position, adjust its working distance to 1cm-3cm, and set the static neutralization intensity;

[0007] Optimize process parameters: adjust the sizing machine’s creel tension, sizing speed, squeezing pressure, dryer wheel temperature, and take-up speed to reduce warp defects and improve yarn consistency.

[0008] Furthermore, the distance that the straight reed moves backward is 20 cm, and the distance between the straight reed and the yarn pressing rod is preferably 5 cm.

[0009] Furthermore, the static neutralization strength of the static eliminator is set to 75%-85% according to the yarn material, and the working distance is preferably 1.5 cm.

[0010] Furthermore, the creel tension of the sizing machine is adjusted to 90%-95% of the original set value to ensure the tension balance of the yarn running.

[0011] Furthermore, the sizing speed is adjusted to 80%-85% of the original speed to ensure that the sizing agent is evenly attached to the yarn surface and reduce warp defects.

[0012] Furthermore, the installation position of the static eliminator is coordinated with the backward position of the straight reed so as to fully neutralize the static electricity before the hairiness detection and improve the arrangement stability of the yarn.

[0013] Furthermore, the slurry pressing process parameters include a slurry pressing pressure which is preferably 90%-95% of the original value to ensure the uniformity and consistency of the slurry on the yarn surface.

[0014] Furthermore, the temperature of the drying wheel is optimized and adjusted according to the yarn material and production requirements, preferably in the range of 80°C-100°C, so as to achieve rapid drying of the yarn and avoid thermal damage.

[0015] Furthermore, the static eliminator adopts a non-contact neutralization method to avoid direct contact with the yarn and causing mechanical damage to the yarn.

[0016] Furthermore, the running speed of the yarn during the sizing process is controlled to be 20-40 m / min to balance the sizing efficiency and the yarn quality.

[0017] Furthermore, during the operation of the sizing machine, the tension changes of the yarn are dynamically monitored, and the tension is adjusted in real time through an automatic adjustment device to further improve the yarn quality.

[0018] The technical solution of the present invention significantly reduces the yarn entanglement problem caused by static adsorption or hairiness by adding the synergistic effect of the static eliminator and the backward movement of the straight reed, so that the yarn arrangement is more neat and the uniformity of the finished cloth is improved. This method is not only suitable for the production of low-dielectric glass fiber cloth, but can also be extended to the production process of other high-performance fiber materials to achieve dual control of hairiness and static electricity.

[0019] The present invention allows the yarn to be fully combed by moving the straight reed backward, reduces the number of downtimes due to hairiness, and improves the operating efficiency of the equipment. The use of the static eliminator effectively neutralizes the static electricity on the yarn, avoids yarn entanglement and adsorption, and improves the stability of the yarn sequence arrangement. After optimizing the process parameters, the consistency and stability of yarn production are greatly improved, warp defects are significantly reduced, and the quality of the finished product is higher. The method of the present invention is applicable to various sizing machines and low-dielectric cloth production equipment, and has wide applicability and promotion prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of an embodiment of the present invention; DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than 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.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" 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 limiting the present invention.

[0024] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Example 1

[0026] like Figure 1 As shown,

[0027] A method for improving the warp quality of low dielectric glass fiber cloth, comprising the following steps:

[0028] 1. Move the straight reed in front of the hairiness detector of the sizing machine backward

[0029] In the textile process, the quality of the yarn directly affects the quality of the final product. Yarn hairiness is an important quality standard. Excessive hairiness not only affects the appearance and quality of the fabric, but may also cause breakage and weaving difficulties in subsequent processing. The hairiness detector of the sizing machine can monitor the hairiness on the yarn surface in real time. Through accurate counting and classification, it helps operators to adjust process parameters in time and reduce the generation of hairiness.

[0030] Move the reed in front of the hairiness detector of the sizing machine backwards by 10cm-30cm from the hairiness detector. A distance of 4cm-6cm from the yarn pressing rod can give the yarn more space to comb and adjust before passing through the hairiness detector, thus reducing the generation of hairiness. At the same time, the backward-moved reed can better guide the yarn, avoiding confusion and entanglement of the yarn when entering the hairiness detector, thereby reducing the number of false stops and hairiness stops.

[0031] 2. Add static eliminator

[0032] During the weaving process, yarns are prone to static electricity due to friction, which will cause adsorption and entanglement between yarns, affecting the uniformity and strength of the yarns. Using an electrostatic eliminator can effectively neutralize the static electricity on the yarns, reduce the adsorption between yarns, ensure the uniformity of the yarn sequence in the yarn sizing trough, and better wrap the original yarn with slurry, thereby improving the quality of the yarn. In addition, the electrostatic eliminator can also reduce yarn breakage caused by static electricity and further improve production efficiency. Therefore, an electrostatic eliminator is added to the position where the straight reed was originally placed. The electrostatic eliminator can effectively eliminate static electricity on the yarn and prevent static electricity from interfering with the arrangement and movement of the yarn. By eliminating static electricity, the stability of the yarn sequence in the yarn sizing trough can be guaranteed, the yarn adsorption caused by static electricity can be reduced, and the uniformity of sizing on the yarn can be better guaranteed.

[0033] 3. Optimize production parameters

[0034] Adjust the process parameters of the sizing machine, such as the tension of the creel, sizing speed, sizing, drying wheel, winding and other tensions to adapt to the back movement of the straight reed and the addition of the static eliminator. The optimized parameters can ensure the stability and consistency of the yarn during the production process and further reduce the occurrence of warp defects.

[0035] Adjust the parameters of the static eliminator, such as static elimination intensity, working distance warp 1cm-3cm, etc., to achieve the best static elimination effect.

[0036] The present invention can effectively reduce the number of hairiness shutdowns, reduce erroneous shutdowns, ensure yarn sequence, and improve quality and production efficiency.

[0037] Embodiment 2: Implementation steps of straight reed backward movement

[0038] Move the straight reed in front of the hairiness detector of the sizing machine backwards by 20 cm and adjust it to a position 5 cm away from the yarn pressing rod. The experiment shows that:

[0039] After the straight reed is moved backward, the combing effect of the yarn in front of the hairiness detector is significantly enhanced, the number of hairiness shutdowns is reduced by about 50%, and the equipment erroneous shutdowns caused by yarn hairiness are greatly reduced.

[0040] Example 3: Installation and commissioning of static eliminator

[0041] Install the static eliminator at the original reed position, adjust its working distance to 2cm, and set the static elimination intensity suitable for glass fiber yarn. The experimental results show:

[0042] The static eliminator neutralizes the static electricity on the yarn surface, significantly reducing yarn adsorption and entanglement, reducing warp defects by about 40%, and making the yarn arrangement more uniform.

[0043] Example 4: Process parameter optimization

[0044] According to the backward movement of the straight reed and the addition of the static eliminator, the parameters of the sizing machine are optimized as follows:

[0045] Creel tension: Adjust to 90%-95% of the original set value to ensure that the yarn runs under balanced tension.

[0046] Sizing speed: Appropriately reduce the speed to 80%-85% of the original value to ensure that the sizing agent is evenly attached to the yarn surface.

[0047] Static eliminator working parameters: set to static neutralization intensity 75%-85%, working distance 1.5cm.

[0048] After optimization, the consistency and uniformity of the yarn are significantly improved, warp defects are further reduced, and product quality is more stable.

[0049] Experimental data comparison

[0050] The test was compared between the device of the present invention and the device without the device: in this sample, the same sizing machine with the same speed, the same batch of warp yarns, and the same viewing machine were used:

[0051] Large feathers small hairiness Using this device 5 18 This device is not used 12 52

[0052] Experiments show that the present invention can significantly reduce yarn hairiness and warp defects and improve the quality and production efficiency of low-dielectric glass fiber cloth by moving the straight reed backward, adding an electrostatic eliminator and optimizing process parameters.

[0053] The present invention can effectively reduce the number of downtimes due to hairiness, ensure yarn sequence, improve quality and production efficiency, and improve the warp defects of low-dielectric fabrics.

[0054] The invention moves the straight reed in front of the hairiness detector of the sizing machine backwards for a certain distance, so that the yarn can be better combed and adjusted before passing through the hairiness detector, thereby reducing the generation of hairiness and thus reducing the probability of shutdown due to hairiness.

[0055] The invention adds a static eliminator, which can effectively eliminate static electricity on the yarn, avoid static electricity from interfering with the arrangement and movement of the yarn, ensure the stability of the yarn sequence, and reduce the generation of warp defects.

[0056] The present invention optimizes production parameters and adjusts the process parameters of the sizing machine, such as the tension of the creel, sizing speed, sizing, drying wheel, winding and other tensions, to adapt to the back movement of the straight reed and the addition of the static eliminator. The optimized parameters can ensure the stability and consistency of the yarn during the production process and further reduce the generation of warp defects.

[0057] The present invention achieves the best static elimination effect by adjusting the parameters of the static eliminator, such as static elimination intensity, working distance ≤ 1CM, etc.

[0058] The present invention can significantly improve the warp quality of low dielectric cloth for 5G through the above improved method, reduce the occurrence of defects, and improve the reliability and stability of the product. The method of the present invention is applicable to various types of sizing machines and low dielectric cloth production equipment, and has a wide range of application prospects.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for improving the warp quality of low dielectric glass fiber cloth, characterized in that: The following steps are involved: Move the straight reed backward: Move the straight reed in front of the hairiness detector of the sizing machine backward by 10cm-30cm and adjust it to a position 4cm-6cm away from the yarn pressing rod; Add static eliminator: install static eliminator at the original reed position, adjust its working distance to 1cm-3cm, and set the static neutralization intensity; Optimize process parameters: adjust the sizing machine’s creel tension, sizing speed, squeezing pressure, dryer wheel temperature, and take-up speed to reduce warp defects and improve yarn consistency.

2. The method for improving the warp quality of low dielectric glass fiber cloth according to claim 1, characterized in that: The distance that the straight reed moves backward is 20 cm, and the distance between the straight reed and the yarn pressing rod is preferably 5 cm.

3. The method for improving the warp quality of low dielectric glass fiber cloth according to claim 1, characterized in that: The static neutralization strength of the static eliminator is set to 75%-85% according to the yarn material, and the working distance is preferably 1.5 cm.

4. The method for improving the warp quality of low dielectric glass fiber cloth according to claim 1, characterized in that: The yarn frame tension of the sizing machine is adjusted to 90%-95% of the original set value to ensure the tension balance of the yarn running.

5. The method for improving the warp quality of low dielectric glass fiber cloth according to claim 1, characterized in that: The sizing speed is adjusted to 80%-85% of the original speed to ensure that the sizing material is evenly attached to the yarn surface and reduce warp defects.

6. The method for improving the warp quality of low dielectric glass fiber cloth according to claim 1, characterized in that: The installation position of the static eliminator is coordinated with the backward position of the straight reed so as to fully neutralize the static electricity before the hairiness detection and improve the arrangement stability of the yarn.

7. The method for improving the warp quality of low dielectric glass fiber cloth according to claim 1, characterized in that: The slurry pressing process parameters include a slurry pressing pressure which is preferably 90% to 95% of the original value to ensure the uniformity and consistency of the slurry on the yarn surface.

8. The method for improving the warp quality of low dielectric glass fiber cloth according to claim 1, characterized in that: The temperature of the drying wheel is optimized and adjusted according to the yarn material and production requirements, preferably in the range of 80°C-100°C, so as to achieve rapid drying of the yarn and avoid thermal damage.

9. The method for improving the warp quality of low dielectric glass fiber cloth according to claim 1, characterized in that: The static eliminator adopts a non-contact neutralization method to avoid direct contact with the yarn and mechanical damage to the yarn.

10. The method for improving the warp quality of low dielectric glass fiber cloth according to claim 1, characterized in that: The running speed of the yarn during the sizing process is controlled at 20-40 m / min to balance the sizing efficiency and yarn quality.

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