Ultrathin edge-sealed electronic-grade glass fiber cloth and preparation method thereof

Abstract

The invention provides ultrathin edge-sealed electronic-grade glass fiber cloth and a preparation method thereof. The ultrathin edge-sealed electronic-grade glass fiber cloth comprises a warp yarn structure and a weft yarn structure, the warp yarn structure comprises main body warp yarns and edge sealing warp yarns arranged on the two sides of the main body warp yarns respectively. The warp yarn structure and the weft yarn structure are interwoven to form the electronic cloth of a plain weave structure, so that the edge sealing warp yarn and the corresponding part of the weft yarn structure form an edge sealing structure, and the main body warp yarn and the rest part of the weft yarn structure form a main body structure; after the edge sealing structure is coated and cured, the thickness of the edge sealing structure is smaller than that of the main body structure; wherein the linear density of the edge sealing warp yarns is smaller than that of the main body warp yarns. The problem that in the prior art, due to the fact that the thickness of the sealing edges on the two sides of the electronic-grade glass fiber cloth is large, the quality is poor is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic cloth weaving, and more particularly, to an ultra-thin edge-sealed electronic glass fiber cloth and a preparation method thereof. Background Art

[0002] As a key material for the manufacture of CCL (copper-clad laminate) and PCB (printed circuit board), with the rapid development of these technologies, the application scope of electronic glass fiber cloth has been gradually expanding, especially in the production of high-frequency high-speed copper-clad laminates and FR-4 copper-clad laminates. In order to meet the demands of the downstream industry for higher efficiency and lower costs, the frequency of using edge-sealed glass fiber cloth has increased significantly. It can effectively prevent edge breakage of materials during processing, reduce waste, and improve overall economic benefits.

[0003] However, in the prior art, the edge-sealing process of electronic glass fiber cloth mainly relies on coating glue on the cloth edge to reinforce the edge and avoid phenomena such as edge cracking and delamination during subsequent manufacturing. Although the thickness of the edge seal can be adjusted by precisely controlling the amount of glue applied, this edge-sealing method essentially makes the thickness of the edge area exceed the planar thickness of the original cloth, resulting in a bulge at the edge-sealed part, affecting the flatness and aesthetics of the product. Even in the manufacture of some precision circuit boards, this additional thickness may lead to the failure of circuit design and increase subsequent production costs. In addition, excessive edge sealing may also cause quality problems, such as the generation of bubbles during the lamination of copper-clad laminates, or increased tool wear due to excessive hardness at the edge during drilling, cutting and other processes. Summary of the Invention

[0004] The main object of the present invention is to provide an ultra-thin edge-sealed electronic glass fiber cloth and a preparation method thereof, so as to solve the problem of poor quality caused by the relatively high edge-sealing thickness on both sides of the electronic glass fiber cloth in the prior art.

[0005] To achieve the above object, according to one aspect of the present invention, there is provided an ultra-thin edge-sealed electronic glass fiber cloth, comprising:

[0006] A warp structure, including a main warp and edge-sealing warps respectively disposed on both sides of the main warp;

[0007] A weft structure, the warp structure and the weft structure are interwoven to form a plain-weave electronic cloth, so that the edge-sealing warps and the corresponding parts on the weft structure form an edge-sealing structure, and the main warp and the remaining parts of the weft structure form a main structure; after coating and curing the edge-sealing structure, the thickness of the edge-sealing structure is less than the thickness of the main structure;

[0008] Wherein, the linear density of the edge-sealing warps is less than the linear density of the main warp.

[0009] Further, the edge-sealing structure includes an edge-sealing part and a to-be-cut part. The edge-sealing part is located between the main warp yarns and the to-be-cut part, so as to obtain a finished cloth with required specifications after cutting the to-be-cut part on the electronic cloth.

[0010] Further, the number of warp yarns N in the edge-sealing part satisfies: N = INT(P×W) ± 4;

[0011] Wherein, P is the warp density of the finished cloth; W is the width of the edge-sealing part; INT is the rounding function.

[0012] Further, the warp density P of the finished cloth satisfies: P = 20 - 75 yarns / inch; and / or,

[0013] The width W of the edge-sealing part satisfies: W = 1mm - 10mm.

[0014] Further, the number of warp yarns X in the edge-sealing warp satisfies: X = INT(P×Q) ± 6;

[0015] Wherein, Q is the coating width on the electronic cloth; INT is the rounding function; X ≥ N.

[0016] Further, the following relationship is satisfied among the width W of the edge-sealing part, the width K of the to-be-cut part, and the coating width Q on the electronic cloth: Q = W + K; wherein, Q = (1.5 - 5)W.

[0017] Further, the following relationship is satisfied between the linear density T of the edge-sealing warp and the linear density H of the main warp: T = (0.5 - 0.9)H; and / or,

[0018] The following relationship is satisfied between the cured thickness C1 and the uncured thickness C2 on the electronic cloth: C1 = (0.75 - 1)C2.

[0019] According to another aspect of the present invention, a preparation method of an ultra-thin edge-sealing electronic-grade glass fiber cloth is provided, which is applicable to the ultra-thin edge-sealing electronic-grade glass fiber cloth mentioned above. The preparation method includes:

[0020] Obtaining a warp structure and a weft structure; performing a first pretreatment on the warp structure and weaving it with the weft structure through a loom to obtain an electronic cloth with a plain weave structure; performing a second pretreatment on the electronic cloth, and coating and curing the edge-sealing structure on the electronic cloth; cutting off the to-be-cut part of the edge-sealing structure after coating and curing to obtain a finished cloth.

[0021] Further, performing the first pretreatment on the warp structure includes:

[0022] Sequentially performing warping, sizing, winding, warping together, and winding up on the warp structure.

[0023] Further, performing the second pretreatment on the electronic cloth includes:

[0024] The electronic cloth is successively subjected to a first desizing treatment, a second desizing treatment, a surface chemical treatment, and a fiber opening treatment.

[0025] Furthermore, the edge sealing structure on the electronic cloth is coated and cured, including:

[0026] The edge sealing structures on both sides of the electronic cloth after the fiber opening treatment are successively coated with glue and heat-cured;

[0027] Among them, the glue used in the glue coating process is PU glue or epoxy resin glue; and / or, the temperature used in the heat curing process is 50°C to 200°C.

[0028] Applying the technical solution of the present invention, an electronic-grade glass fiber cloth with an ultra-thin edge sealing is provided, including a warp structure and a weft structure; the warp structure includes a main warp and edge-sealing warps respectively arranged on both sides of the main warp; the warp structure and the weft structure are interwoven to form a plain weave structure of the electronic cloth, so that the edge-sealing warps and the corresponding parts on the weft structure form an edge-sealing structure, and the main warp and the remaining parts of the weft structure form a main structure; after the edge-sealing structure is coated and cured, the thickness of the edge-sealing structure is less than the thickness of the main structure; among them, the linear density of the edge-sealing warps is less than the linear density of the main warp.

[0029] By replacing the main warps on both sides of the warp structure with edge-sealing warps with a smaller linear density, when the edge-sealing warps and the weft structure are interwoven to form an edge-sealing structure and are coated and cured in subsequent processes, the thickness of the edge-sealing structure is thinner than that of the main part. Even after glue coating and edge sealing, a lower thickness can be maintained, effectively improving the quality problems such as the edge bulge and edge bursting of the electronic cloth caused by too thick edge sealing and the copper wrinkle at the edge of the copper-clad laminate. Furthermore, the problem of poor quality caused by the relatively high edge-sealing thickness on both sides of the electronic-grade glass fiber cloth in the prior art is solved. Moreover, the improved edge-sealing structure not only reduces the edge-sealing thickness, but also optimizes the uniformity and overall quality of the cloth surface, and can also ensure good strength performance, effectively meeting the high-quality requirements of customers. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The schematic diagrams in the specification, which form a part of this application, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0031] Figure 1 The schematic structural diagram of the electronic cloth provided by the embodiment of the ultra-thin edge-sealing electronic-grade glass fiber cloth according to the present invention is shown;

[0032] Figure 2 The schematic structural diagram of the finished cloth provided by the embodiment of the ultra-thin edge-sealing electronic-grade glass fiber cloth according to the present invention is shown;

[0033] Figure 3 The structural schematic diagram of the warp structure provided by an embodiment of the ultra-thin edge-sealed electronic-grade glass fiber cloth according to the present invention is shown;

[0034] Figure 4 The structural schematic diagram of the weft structure provided by an embodiment of the ultra-thin edge-sealed electronic-grade glass fiber cloth according to the present invention is shown.

[0035] Wherein, the above-mentioned drawings include the following reference numerals:

[0036] 1, electronic cloth; 2, finished cloth; 10, warp structure; 11, main warp; 12, edge-sealing warp; 20, weft structure; 30, edge-sealing structure; 31, edge-sealing part; 32, part to be cut; 40, main structure. Detailed implementation manners

[0037] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0038] In order to solve the problem that the edge-sealing thickness on both sides of the electronic-grade glass fiber cloth in the prior art is relatively high, resulting in poor quality. The present invention provides an ultra-thin edge-sealed electronic-grade glass fiber cloth and a preparation method thereof.

[0039] Please refer to Figures 1 to 4 As shown, in one aspect of applying the technical solution of the present invention, an ultra-thin edge-sealed electronic-grade glass fiber cloth is provided, which includes a warp structure 10 and a weft structure 20; the warp structure 10 includes a main warp 11 and edge-sealing warps 12 respectively arranged on both sides of the main warp 11; the warp structure 10 and the weft structure 20 are interwoven to form an electronic cloth 1 with a plain weave structure, so that the edge-sealing warps 12 and the corresponding parts on the weft structure 20 form an edge-sealing structure 30, and the main warp 11 and the remaining parts of the weft structure 20 form a main structure 40; after coating and curing the edge-sealing structure 30, the thickness of the edge-sealing structure 30 is less than the thickness of the main structure 40; wherein, the linear density of the edge-sealing warps 12 is less than the linear density of the main warp 11.

[0040] By replacing the main warp yarns 11 on both sides of the warp structure 10 with hemming warp yarns 12 of a smaller linear density, when the hemming warp yarns 12 are interwoven with the weft structure 20 to form a hemming structure 30 and are coated and cured in subsequent processes, the thickness of the hemming structure 30 is thinner than that of the main body part. Even after glue coating and hemming, it can maintain a low thickness, effectively improving the quality problems such as the hemming bulge and edge bursting of the electronic cloth 1 caused by excessive hemming thickness and the copper wrinkles at the edges of the copper-clad laminate. Furthermore, it solves the problem of poor quality caused by the higher hemming thickness on both sides of the electronic-grade glass fiber cloth in the prior art. Moreover, the improved hemming structure 30 not only reduces the hemming thickness, but also optimizes the uniformity and overall quality of the cloth surface, and can also ensure good strength performance, effectively guaranteeing the high-quality requirements of customers.

[0041] As Figure 1 and Figure 2 shown, the hemming structure 30 includes a hemming part 31 and a to-be-cut part 32. The hemming part 31 is located between the main warp yarns 11 and the to-be-cut part 32, so that after cutting the to-be-cut part 32 on the electronic cloth 1, a finished cloth 2 of the required specification can be obtained.

[0042] Since the hemming part 31 is located between the main warp yarns 11 and the to-be-cut part 32, and the warp density of the hemming part 31 is lower than that of the main warp yarns 11, it can maintain a low thickness after the hemming structure 30 is coated and cured. And according to the required width of the hemming structure 30, by cutting off the to-be-cut part 32, it is ensured that the hemming width and thickness of the final finished cloth 2 exactly meet the design requirements, avoiding edge bulge or unevenness caused by excessive coating thickness, and improving the surface accuracy and visual flatness of the finished cloth 2.

[0043] Designed in this way, it allows the manufacturer to flexibly adjust the linear density, number of roots of the hemming warp yarns 12 and the width of the to-be-cut part 32 according to the specific specification requirements of the finished cloth 2, so as to achieve precise control of the hemming width and thickness. Overall, it helps to optimize the production process, reduce unnecessary material waste and improve production efficiency, especially performing well in mass production and quality control.

[0044] It should be noted that after the electronic cloth 1 is produced, it is necessary to coat and cure the hemming structure 30 at the edge, and then cut off the to-be-cut part 32 according to the required hemming width to obtain the finished cloth 2 of the required specification. Because there is a cut-off part, it needs to be considered during yarn arrangement. Both the cut-off part and the reserved part (i.e., the warp yarns of the hemming part 31 and the to-be-cut part 32) are made into ultra-thin hemming warp yarns 12, so that the obtained hemming part 31 is the required result; and regardless of the cloth type, as long as it is a hemming cloth, the linear density of the yarn used for the hemming part 31 is smaller than that of the main yarn, so as to achieve precise control of the width and thickness of the hemming structure 30, help to optimize the production process, reduce unnecessary material waste and improve production efficiency, while the warp yarns arranged in the conventional production of the current industry are all of one variety.

[0045] Specifically, the number of warp yarns N in the edge-sealing part 31 satisfies: N = INT(P×W) ± 4;

[0046] wherein, P is the warp density of the finished cloth 2; W is the width of the edge-sealing part 31; and INT is the rounding function.

[0047] Preferably, the number of warp yarns N in the edge-sealing part 31 satisfies: N = INT(P×W) ± 2.

[0048] In this embodiment, both the warp density P of the finished cloth 2 and the width W of the edge-sealing part 31 can be selected differently according to the requirements of finished cloths 2 of different specifications.

[0049] Preferably, the warp density P of the finished cloth 2 satisfies: P = 20 - 75 threads / inch; the width W of the edge-sealing part 31 satisfies: W = 1 mm - 10 mm.

[0050] Specifically, the number of warp yarns X of the edge-sealing warp 12 satisfies: X = INT(P×Q) ± 6;

[0051] wherein, Q is the coating width on the electronic cloth 1; INT is the rounding function; and X ≥ N.

[0052] Specifically, the following relationship is satisfied among the width W of the edge-sealing part 31, the width K of the to-be-cut part 32, and the coating width Q on the electronic cloth 1: Q = W + K; wherein, Q = (1.5 - 5)W.

[0053] It should be noted that during yarn arrangement, in order to conveniently obtain the final required edge-sealing width, the edge-sealing warp 12 is reserved according to the coating width (the coating width is actually selected according to the requirements of finished cloths 2 of different specifications. For example, if the required width of the single-sided edge-sealing part 31 is 4 mm, then the manufacturer needs to reserve at least 10 mm to obtain a width of 4 mm through cutting, so W = 4, K = 6, Q = 10, and yarn arrangement should be carried out according to the coating width during yarn arrangement to ensure that the width of the edge-sealing part 31 of the final obtained finished cloth 2 is the required one), and the final finished cloth 2 can be obtained by cutting off the redundant to-be-cut part 32 on the electronic cloth 1.

[0054] Specifically, the following relationship is satisfied between the linear density T of the edge-sealing warp 12 and the linear density H of the main body warp 11: T = (0.5 - 0.9)H.

[0055] Specifically, the following relationship is satisfied between the cured thickness C1 and the uncured thickness C2 on the electronic cloth 1: C1 = (0.75 - 1)C2.

[0056] On the other hand, applying the technical solution of the present invention, there is provided a method for preparing an electronic-grade glass fiber cloth with an ultra-thin edge sealing, which is applicable to the above-mentioned electronic-grade glass fiber cloth with an ultra-thin edge sealing. The preparation method includes:

[0057] Obtain the warp structure 10 and the weft structure 20; perform a first pretreatment on the warp structure 10 and weave it with the weft structure 20 through a loom to obtain an electronic cloth 1 with a plain weave structure; perform a second pretreatment on the electronic cloth 1, and coat and cure the edge sealing structure 30 on the electronic cloth 1; cut off the to-be-cut part 32 of the edge sealing structure 30 after coating and curing to obtain the finished cloth 2.

[0058] In this way, through the first pretreatment of the warp structure 10 in the early stage, it is ensured that the edge sealing warp 12 and the main body warp 11 are arranged according to a predetermined linear density difference, so as to form an electronic cloth 1 with a plain weave structure with an ultra-thin edge sealing during the weaving process. The second pretreatment and the coating and curing treatment ensure that the edge sealing part 31 can be evenly coated with glue and maintain the required thickness and strength after curing, which can effectively improve the applicability and reliability of the electronic cloth 1 in the subsequent production of electronic products.

[0059] By cutting off the to-be-cut part 32 of the edge sealing structure 30, it can be ensured that the edge sealing width of the final finished cloth 2 completely meets the design requirements. Among them, when arranging the warp yarns of the to-be-cut part 32 is reserved before coating and curing, and finally when obtaining the finished cloth 2, the final width of the edge sealing structure 30 can be flexibly adjusted by cutting to obtain an edge sealing width and thickness that meet the specification requirements, which not only improves the dimensional accuracy of the finished cloth 2, but also reduces material waste and processing costs during the production process.

[0060] Specifically, the first pretreatment of the warp structure 10 includes: arranging the warp yarns, sizing, winding, warping and taking-up of the warp structure 10 in sequence.

[0061] First, the main body warp 11 and the edge sealing warp 12 are arranged according to a certain order and density. Then sizing is performed, that is, a layer of sizing agent is applied to the warp structure 10 to increase its strength and wear resistance and reduce frictional damage during weaving. Specific sizing agents may be used for glass fibers, such as starch or chemical sizing agents, which need to be heat-resistant or have better adhesion. Next is winding, winding the sized warp structure 10 into a warp beam to prepare for subsequent warping. Then is warping, combining multiple warp beams into a loom beam with the total number of warp yarns meeting the requirements to increase the number of warp yarns, so as to weave a wider cloth or a denser structure. Finally is taking-up, winding the warped warp yarns onto the loom beam to prepare for subsequent weaving with the weft structure 20.

[0062] Specifically, the second pretreatment of the electronic cloth 1 includes: performing a first desizing treatment, a second desizing treatment, a surface chemical treatment and a fibrillating treatment on the electronic cloth 1 in sequence.

[0063] Pre-desizing treatment is to preliminarily remove the sizing agent and surface impurities remaining on the electronic cloth 1 during the weaving process, preparing for subsequent high-temperature desizing. Thermal desizing treatment is to completely decompose and remove the sizing agent residues carbonized at high temperature (such as PVA, acrylate, etc.), avoiding volatilization pollution during subsequent high-temperature applications. Surface chemical treatment is to enhance the interfacial bonding force between the fiber and the resin matrix through a coupling agent or coating, improving the performance of the composite material. Fiber opening treatment is to disperse the monofilaments in the fiber bundle, improving the surface uniformity of the cloth and resin wettability. Among them, pre-desizing and thermal desizing involve different temperatures and treatment methods, surface chemical treatment involves coatings or coupling agents, and fiber opening treatment is to disperse the fibers and improve the uniformity of the cloth.

[0064] Specifically, coating and curing the edge sealing structure 30 on the electronic cloth 1 includes: sequentially coating glue and thermally baking and curing the edge sealing structures 30 on both sides of the electronic cloth 1 after fiber opening treatment.

[0065] After coating glue on the edge sealing structures 30 on both sides and curing by thermal baking, the glue can uniformly penetrate between the fibers and cure, forming a stable protective layer, significantly enhancing the durability of the edge sealing structure 30. Moreover, the heat treatment during the curing process can also promote the chemical reaction between the glue and the fibers, further improving the mechanical strength of the edge sealing area and ensuring that the edge of the electronic cloth 1 will not be easily damaged during subsequent processing or use.

[0066] In this embodiment, the glue used in the glue coating process is PU glue or epoxy resin glue.

[0067] The coatings formed after curing of PU glue and epoxy resin glue usually have high hardness and wear resistance, which can enhance the physical strength of the edge sealing part 31 of the electronic cloth 1, reduce wear and damage, and extend the service life. Epoxy resin glue has excellent electrical insulation performance, enabling it to provide additional electrical safety guarantee for the final electronic products in the edge sealing treatment of electronic-grade glass fiber cloth. Therefore, choosing PU glue or epoxy resin glue for coating and curing the edge sealing structure 30 can significantly improve the edge sealing quality and overall performance of the electronic-grade glass fiber cloth, while considering environmental protection and cost-effectiveness.

[0068] In this embodiment, the temperature used in the thermal baking and curing process is 50°C to 200°C; specifically, it can be 50°C, 100°C, 150°C, 180°C, and 200°C.

[0069] Within the curing temperature range, selecting a higher temperature (such as 150°C, 180°C, 200°C) can significantly accelerate the curing reaction of PU glue or epoxy resin glue, shorten the curing time, and improve production efficiency. By adjusting the temperature, the manufacturer can control the quality and speed of glue curing. A lower temperature (such as 50°C, 100°C) results in a milder curing process, which is suitable for specific applications that require a longer time to ensure uniform curing, helping to avoid problems such as surface blistering and uneven internal curing caused by too fast curing. An appropriate curing temperature can ensure the formation of chemical bonds between the glue and the fiberglass cloth, stabilize the edge sealing structure 30, increase its mechanical strength and durability. It helps the electronic cloth 1 to maintain good shape and performance during subsequent processing and reduces the risk of edge damage.

[0070] Comparative example:

[0071] A traditional 7628 electronic cloth 1, the warp structure 10 uses the main warp 11 uniformly, without the ultra-thin edge-sealing warp 12. The linear density H of the main warp 11 is 68.9 tex, the warp density is 44 threads / inch, and the edge-sealing width W on one side is 4 mm.

[0072] Example 1:

[0073] An ultra-thin edge-sealed electronic-grade fiberglass cloth, the cloth type is 7628, the linear density H of the main warp 11 is 68.9 tex, the linear density T of the ultra-thin edge-sealing warp 12 is 60 tex, the warp density is 44 threads / inch, the edge-sealing width W on one side is 8 mm, and the number of ultra-thin edge-sealing warp 12 used on one side is 16.

[0074] Example 2:

[0075] An ultra-thin edge-sealed electronic-grade fiberglass cloth, the cloth type is 7628, the linear density H of the main warp 11 is 68.9 tex, the linear density T of the ultra-thin edge-sealing warp 12 is 38 tex, the warp density is 44 threads / inch, the edge-sealing width W on one side is 2 mm, and the number of ultra-thin edge-sealing warp 12 used on one side is 2.

[0076] Example 3:

[0077] An ultra-thin edge-sealed electronic-grade fiberglass cloth, the cloth type is 7628, the linear density H of the main warp 11 is 74.6 tex, the linear density T of the ultra-thin edge-sealing warp 12 is 55 tex, the warp density is 41 threads / inch, the edge-sealing width W on one side is 3 mm, and the number of ultra-thin edge-sealing warp 12 used on one side is 6.

[0078] Example 4:

[0079] An electronic-grade fiberglass cloth with an ultra-thin edge seal, the cloth type is 3340, the linear density H of the main warp yarn 11 is 70.2 tex, the linear density T of the ultra-thin edge-sealing warp yarn 12 is 48 tex, the warp density is 22 threads per inch, the edge-sealing width W on one side is 5 mm, and the number of ultra-thin edge-sealing warp yarns 12 used on one side is 6.

[0080] Example 5:

[0081] An electronic-grade fiberglass cloth with an ultra-thin edge seal, the cloth type is 1506, the linear density H of the main warp yarn 11 is 44.9 tex, the linear density T of the ultra-thin edge-sealing warp yarn 12 is 32 tex, the warp density is 47 threads per inch, the edge-sealing width W on one side is 4 mm, and the number of ultra-thin edge-sealing warp yarns 12 used on one side is 8.

[0082] Example 6:

[0083] An electronic-grade fiberglass cloth with an ultra-thin edge seal, the cloth type is 2221, the linear density H of the main warp yarn 11 is 22.5 tex, the linear density T of the ultra-thin edge-sealing warp yarn 12 is 18 tex, the warp density is 60 threads per inch, the edge-sealing width W on one side is 4 mm, and the number of ultra-thin edge-sealing warp yarns 12 used on one side is 10.

[0084] Example 7:

[0085] An electronic-grade fiberglass cloth with an ultra-thin edge seal, the cloth type is 1080, the linear density H of the main warp yarn 11 is 11.2 tex, the linear density T of the ultra-thin edge-sealing warp yarn 12 is 8 tex, the warp density is 60 threads per inch, the edge-sealing width W on one side is 4 mm, and the number of ultra-thin edge-sealing warp yarns 12 used on one side is 10.

[0086] It should be noted that the unilateral cutting width described above does not include the width of the selvage of the electronic-grade fiberglass cloth.

[0087] Table 1, Table 2 and Table 3 are the comparisons of various data and effects of the comparative examples and each example, and the comparison results are as follows:

[0088]

[0089]

[0090] Table 1 - Basic Usage Parameter Table - 1

[0091]

[0092] Table 2 - Basic Usage Parameter Table - 2

[0093]

[0094]

[0095] Table 3 - Basic physical property parameters

[0096] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0097] The ultra-thin edge-sealed electronic-grade fiberglass cloth includes a warp structure 10 and a weft structure 20; the warp structure 10 includes a main warp 11 and edge-sealing warps 12 respectively arranged on both sides of the main warp 11; the warp structure 10 and the weft structure 20 are interwoven to form a plain-weave electronic cloth 1, so that the edge-sealing warp 12 and the corresponding part on the weft structure 20 form an edge-sealing structure 30, and the main warp 11 and the remaining part of the weft structure 20 form a main structure 40; after coating and curing the edge-sealing structure 30, the thickness of the edge-sealing structure 30 is less than the thickness of the main structure 40; wherein, the linear density of the edge-sealing warp 12 is less than the linear density of the main warp 11. By replacing the main warps 11 on both sides of the warp structure 10 with edge-sealing warps 12 with a smaller linear density, when the edge-sealing warps 12 are interwoven with the weft structure 20 to form the edge-sealing structure 30 and are coated and cured in subsequent processes, the thickness of the edge-sealing structure 30 is thinner than that of the main part. Even after edge-sealing with glue, it can maintain a low thickness, effectively improving the quality problems such as the edge bulge and edge explosion of the electronic cloth 1 caused by too thick edge-sealing and the copper wrinkle at the edge of the copper-clad laminate, and further solving the problem of poor quality caused by the higher edge-sealing thickness on both sides of the electronic-grade fiberglass cloth in the prior art. Moreover, the improved edge-sealing structure 30 not only reduces the edge-sealing thickness, but also optimizes the surface uniformity and overall quality of the cloth, and can also ensure good strength performance, effectively ensuring the high-quality requirements of customers.

[0098] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0099] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience in description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof is not required in subsequent drawings.

[0100] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc., are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary statements, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention; the orientation terms "inner, outer" refer to the inside and outside relative to the contour of each component itself.

[0101] For the sake of convenience in description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above", etc. may be used here to describe the spatial positional relationships of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0102] In addition, it should be noted that the use of words such as "first", "second", etc. to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above words have no special meanings, and thus should not be construed as limiting the protection scope of the present invention.

[0103] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An ultra-thin edge-sealed electronic grade glass fiber cloth, characterized in that: include: A warp yarn structure (10) comprising main warp yarns (11) and edge-sealing warp yarns (12) respectively arranged on both sides of the main warp yarns (11); A weft yarn structure (20), wherein the warp yarn structure (10) and the weft yarn structure (20) are interwoven to form an electronic cloth (1) with a plain weave structure, so that the edge-sealing warp yarn (12) and the corresponding portion of the weft yarn structure (20) form an edge-sealing structure (30), and the main body warp yarn (11) and the remaining portion of the weft yarn structure (20) form a main body structure (40); after the edge-sealing structure (30) is coated and cured, the thickness of the edge-sealing structure (30) is less than the thickness of the main body structure (40); Wherein, the linear density of the edge-sealing warp yarn (12) is smaller than the linear density of the main warp yarn (11).

2. The ultra-thin edge-sealed electronic grade glass fiber cloth according to claim 1, characterized in that: The edge sealing structure (30) comprises an edge sealing portion (31) and a portion to be cut (32), wherein the edge sealing portion (31) is located between the main warp yarn (11) and the portion to be cut (32), so that after the portion to be cut (32) on the electronic cloth (1) is cut, a finished cloth (2) of required specifications is obtained.

3. The ultra-thin edge-sealed electronic grade glass fiber cloth according to claim 2, characterized in that: The number N of warp yarns of the edge sealing portion (31) satisfies: N=INT(P×W)±4; Wherein, P is the warp density of the finished fabric (2); W is the width of the edge-sealed portion (31); and INT is a rounding function.

4. The ultra-thin edge-sealed electronic grade glass fiber cloth according to claim 3, characterized in that: The warp density P of the finished fabric (2) satisfies: P = 20 to 75 yarns / inch; and / or, The width W of the edge sealing portion (31) satisfies: W=1 mm to 10 mm.

5. The ultra-thin edge-sealed electronic grade glass fiber cloth according to claim 3, characterized in that: The number X of the edge-sealing warp yarns (12) satisfies: X=INT(P×Q)±6; Wherein, Q is the coating width on the electronic cloth (1); INT is the rounding function; and X≥N.

6. The ultra-thin edge-sealed electronic grade glass fiber cloth according to claim 5, characterized in that: The width W of the edge-sealed portion (31), the width K of the portion to be cut (32), and the coating width Q on the electronic cloth (1) satisfy: Q=W+K; wherein Q=(1.5-5)W.

7. The ultra-thin edge-sealed electronic grade glass fiber cloth according to claim 1, characterized in that: The linear density T of the edge-sealing warp yarn (12) and the linear density H of the main warp yarn (11) satisfy the following relationship: T = (0.5-0.9) H; and / or, The cured thickness C1 and the uncured thickness C2 on the electronic cloth (1) satisfy the following relationship: C1 = (0.75-1) C2.

8. A method for preparing an ultra-thin edge-sealed electronic-grade glass fiber cloth, applicable to the ultra-thin edge-sealed electronic-grade glass fiber cloth according to any one of claims 1 to 7, characterized in that: The preparation method comprises: Obtaining a warp yarn structure (10) and a weft yarn structure (20); Performing a first pretreatment on the warp yarn structure (10) and weaving it with the weft yarn structure (20) through a loom to obtain an electronic cloth (1) with a plain weave structure; Performing a second pretreatment on the electronic cloth (1), and coating and curing the edge sealing structure (30) on the electronic cloth (1); The portion to be cut (32) of the edge sealing structure (30) after coating and curing is cut off to obtain a finished cloth (2).

9. The method for preparing the ultra-thin edge-sealed electronic-grade glass fiber cloth according to claim 8, characterized in that: The first pretreatment of the warp yarn structure (10) comprises: The warp yarn structure (10) is sequentially subjected to the steps of arranging, sizing, winding, warping and taking up.

10. The method for preparing the ultra-thin edge-sealed electronic-grade glass fiber cloth according to claim 8, characterized in that: The second pre-processing of the electronic cloth (1) comprises: The electronic cloth (1) is subjected to a first desizing treatment, a second desizing treatment, a surface chemical treatment and a fiber opening treatment in sequence.

11. The method for preparing the ultra-thin edge-sealed electronic-grade glass fiber cloth according to claim 10, characterized in that: The coating and curing of the edge sealing structure (30) on the electronic cloth (1) comprises: Sequentially applying glue and heat-baking to cure the edge sealing structures (30) on both sides of the electronic cloth (1) after the fiber opening treatment; The glue used in the glue coating process is PU glue or epoxy resin glue; and / or the temperature used in the heat curing process is 50°C to 200°C.

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