Edge-coated glass fiber cloth and prepreg using the same

Abstract

The application relates to an edge sealing glass fiber cloth and a prepreg using the same, which comprises a main body part and an edge sealing part connected with each other, the main body part comprises first warp yarns, and the edge sealing part comprises second warp yarns; the outer diameter size of the second warp yarns is 10%-40% smaller than that of the first warp yarns, wherein 40% is not included; by reasonably controlling the reduction ratio of the outer diameter of the warp yarns of the edge sealing part and the outer diameter of the warp yarns of the main body part, the edge sealing thickness can be effectively reduced, the glass fiber cloth edge can be prevented from being out of yarn, and the problem that the glass fiber cloth is broken due to the thin edge sealing can be avoided.

Description

Technical Field

[0001] This application relates to the field of fiberglass cloth technology, and in particular to a sealing fiberglass cloth and a prepreg using the same. Background Technology

[0002] Fiberglass cloth, also known as glass fiber cloth, is a type of fabric woven from glass fibers. It typically possesses properties such as high temperature resistance, corrosion resistance, and electrical insulation. Based on whether it contains fibrous edges, fiberglass cloth currently sold on the market can be divided into fibrous-edged fiberglass cloth and edge-sealed fiberglass cloth. Fiberglass cloth with fibrous edges tends to carry away more material when attaching other materials, resulting in material waste. Furthermore, the fibrous edges have weak binding force, and if they break off and fall into the attached material during downstream production, they can cause contamination. Therefore, the market demand for edge-sealed fiberglass cloth has been increasing year by year.

[0003] However, due to the relatively thick edges of the fiberglass sealing cloth, edge bursting is prone to occur during winding. When laminating thin copper plates with thicker surfaces, the excessive thickness of the adhesive sheet on both sides can easily cause wrinkles on the plate edges, affecting product quality. To solve these problems, the industry has reduced the thickness of the adhesive used for sealing the fiberglass cloth, but the effect is poor, and excessively thin adhesive can easily cause fraying, affecting the appearance of the adhesive sheet and clogging the adhesive groove.

[0004] Another prior art, CN201770821U, discloses a glass fiber cloth with fine edge yarns on a warp beam. It is mainly woven from warp and weft yarns. The diameter of the fine warp yarns at the outermost edge of the glass fiber cloth is between two-fifths and three-fifths of the diameter of the other warp yarns. Although this design creates a glass fiber cloth with thin edges and thick middle, the edge thickness is too thin and it is not suitable for use in the copper clad laminate manufacturing field. There is a problem of cloth breakage during dip-coating and pulling, which hinders production.

[0005] Therefore, there is an urgent need for a solution that can reduce the thickness of the edge sealing while avoiding fabric breakage, glue channel blockage, or thin edge sealing. Utility Model Content

[0006] To address the aforementioned problems, this application provides an edge-sealing fiberglass cloth, comprising a main body and an edge-sealing part connected to each other, wherein the main body includes a first warp yarn and the edge-sealing part includes a second warp yarn;

[0007] The outer diameter of the second warp yarn is 10%-40% smaller than that of the first warp yarn, excluding 40%.

[0008] Furthermore, the main body portion has a first thickness, and the edge sealing portion has a second thickness, wherein the first thickness is 0.002mm-0.010mm greater than the second thickness.

[0009] Furthermore, the first warp yarn includes a first filament numbered in the first number of yarns, and the second warp yarn includes a second filament numbered in the second number of yarns;

[0010] When the number of first yarns is equal to the number of second yarns, the outer diameter of the second yarn is 10%-40% smaller than the outer diameter of the first yarn, excluding 40%.

[0011] When the outer diameter of the first yarn is equal to the outer diameter of the second yarn, the number of yarns in the second yarn is 10%-40% smaller than the number of yarns in the first yarn, excluding 40%.

[0012] Furthermore, the edge-sealing fiberglass cloth also includes a slurry layer that simultaneously covers the main body and the edge-sealing portion, and the thickness of the slurry layer is consistent from the main body to the edge-sealing portion.

[0013] Furthermore, the edge-sealing fiberglass cloth also includes a coupling agent covering the outside of the slurry layer, and the thickness of the coupling agent is consistent from the main body to the edge-sealing part.

[0014] Furthermore, the edge sealing portion has a first width, which ranges from 0.1mm to 10mm.

[0015] Furthermore, the edge-sealing fiberglass cloth includes weft yarns threaded through the first warp yarns and the second warp yarns, and the diameter of the weft yarns is the same from the main body portion to the edge-sealing portion.

[0016] Furthermore, the density of the edge-sealing fiberglass cloth is a×b, where a is the number of the first warp and / or the second warp per unit inch, and the value of a ranges from 30 to 120; b is the number of weft yarns per unit inch, and the value of b ranges from 10 to 120.

[0017] This application also provides a semi-cured sheet, including the aforementioned edge-sealing fiberglass cloth.

[0018] This application relates to a fiberglass sealing cloth and a prepreg using the same, comprising a main body and a sealing portion connected to each other. The main body includes a first warp yarn, and the sealing portion includes a second warp yarn. The outer diameter of the second warp yarn is 10%-40% smaller than that of the first warp yarn, excluding 40%. By reasonably controlling the reduction ratio between the outer diameter of the sealing portion warp yarn and the outer diameter of the main body warp yarn, the sealing thickness can be effectively reduced, which can both prevent the fiberglass cloth from fraying at the edge and avoid the problem of fiberglass cloth breaking due to a thin sealing edge. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall fiberglass cloth used in this application;

[0020] Figure 2 This is a cross-sectional view of the first embodiment of this application;

[0021] Figure 3 This is a cross-sectional view of the second embodiment of this application.

[0022] Explanation of reference numerals in the attached figures

[0023] 1. Edge sealing fiberglass cloth; 11. Main body; 12. Edge sealing part; 20. Weft yarn; 21. First warp yarn; 22. Second warp yarn. Detailed Implementation

[0024] To gain a more detailed understanding of the features and technical content of the embodiments disclosed herein, the following description is provided in conjunction with the accompanying drawings. Figure 1-3 The implementation of the embodiments of this disclosure is described in detail. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, various details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other instances, well-known structures and apparatuses may be simplified in their depiction to simplify the drawings.

[0025] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0026] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0027] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0028] Unless otherwise stated, the term "multiple" means two or more.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0030] To provide a better understanding of the purpose, structure, features, and functions of this application, detailed descriptions are provided below with reference to specific embodiments.

[0031] To address the aforementioned issues, this application provides a sealing fiberglass cloth 1, comprising a main body portion 11 and a sealing portion 12 connected to each other. The main body portion 11 includes a first warp yarn 21, and the sealing portion 12 includes a second warp yarn 22.

[0032] The outer diameter of the second warp yarn 22 is 10%-40% smaller than the outer diameter of the first warp yarn 21, excluding 40%.

[0033] The edge-sealing fiberglass cloth 1 is woven from multiple sets of weft yarns 20 and multiple sets of warp yarns. The edge-sealing fiberglass cloth 1 includes a main body 11 and an edge-sealing part 12 disposed in the edge area of ​​the main body 11. The edge-sealing part 12 is an extension of the main body 11 and protects the edge of the main body 11.

[0034] The main body 11 of the edge-sealing fiberglass cloth 1 is woven from multiple sets of first warp yarns 21 and multiple sets of weft yarns 20. The first warp yarns 21 have a larger diameter than the second warp yarns 22, and therefore have a certain strength. They interweave with the weft yarns 20 to form a stable and strong main body 11, ensuring the overall stability and durability of the edge-sealing fiberglass cloth 1.

[0035] The edge sealing portion 12 of the edge sealing fiberglass cloth 1 is located in the edge area of ​​the edge sealing fiberglass cloth 1, and is provided on the outer edge of the main body portion 11 and is closely connected to the main body portion 11.

[0036] The edge sealing part 12 is woven from multiple sets of second warp yarns 22 and multiple sets of weft yarns 20. The outer diameter of the second warp yarns 22 is 10%-40% smaller than the outer diameter of the first warp yarns 21 provided in the main body part 11, so that the edge sealing part 12 can effectively reduce its thickness while maintaining sufficient strength, excluding 40%.

[0037] When the outer diameter of the second warp 22 of the edge sealing portion 12 is 40% or more smaller than the outer diameter of the first warp 21 of the main body portion 11 of the edge sealing fiberglass cloth 1, the excessive thickness difference between the main body portion and the edge sealing portion will cause uneven stress distribution when the edge sealing portion is subjected to external force. After impregnation, the edge sealing portion 12 will experience local stress concentration, and the edge sealing fiberglass cloth 1 will break.

[0038] By controlling the reduction ratio of the outer diameter of the second warp 22 to the outer diameter of the first warp 21 of the edge sealing part 12 to within 40%, it can be ensured that the edge sealing part 12 maintains sufficient thickness while forming a good transition and connection with the main body part 11. This makes the overall structure of the edge sealing fiberglass cloth 1 more uniform and stable after impregnation, effectively preventing the edge sealing fiberglass cloth 1 from breaking and improving the overall performance and service life of the edge sealing fiberglass cloth 1.

[0039] See Table 1, which is a comparison table of different percentages where the outer diameter of the second warp 22 is smaller than that of the first warp 21.

[0040] Table 1: Comparison Table of Different Percentages in the Outer Diameter of the Second Warp Yarn Compared to the First Warp Yarn

[0041]

[0042] As shown in Table 1, in this embodiment, the outer diameter of the second warp 22 of the edge sealing portion 12 is 25% smaller than that of the first warp 21, resulting in a 0.006mm reduction in the thickness of the edge sealing portion 12 compared to the thickness of the main body portion 11, which is within a reasonable range. In the comparative example, the outer diameter of the second warp 22 of the edge sealing portion 12 is 45% smaller than that of the first warp 21, resulting in a 0.012mm reduction in the thickness of the edge sealing portion 12 compared to the thickness of the main body portion 11, which is a significant reduction and may lead to breakage of the edge sealing fiberglass cloth 1 after impregnation.

[0043] Therefore, in actual production, the outer diameter of the second warp 22 of the edge sealing part 12 is adjusted according to specific requirements to ensure that the thickness of the edge sealing part is uniform and does not affect the overall strength of the edge sealing fiberglass cloth 1.

[0044] This application solves the problem of edge bursting that easily occurs during the winding of traditional edge sealing by setting the outer diameter of the second warp 22 to be 10%-40% smaller than the outer diameter of the first warp 21, as well as the problem of edge wrinkling that may occur when pressing thin copper thick plates. The 40% difference is not included in this application.

[0045] The main body 11 has a first thickness, and the edge sealing part 12 has a second thickness, wherein the first thickness is 0.002mm-0.010mm greater than the second thickness.

[0046] The first warp yarn 21 includes a first yarn filament with a first number of yarns, and the second warp yarn 22 includes a second yarn filament with a second number of yarns.

[0047] Each of the first warp yarns 21 in the main body 11 is composed of a fixed number of first yarns arranged closely together. The first yarns of the first number have a uniform outer diameter. The first number is denoted as n1, and the diameter of the first yarn is denoted as d1.

[0048] Each second warp yarn 22 of the edge sealing part 12 is composed of a fixed number of second yarns arranged closely together. The second yarns of the second number have a uniform outer diameter. The second number is denoted as n2, and the diameter of the second yarn is denoted as d2.

[0049] In the first embodiment, when the number of first yarns n1 and the number of second yarns n2 are equal, the outer diameter d2 of the second yarn is 10%-40% smaller than the outer diameter d1 of the first yarn, excluding 40%. It can be understood that when n1=n2, the range of d2 is [(1-0.4)×d1,(1-0.1)×d1], that is, the range of d2 is [0.6d1,0.9d1].

[0050] Preferably, when the number of first yarns n1 is equal to the number of second yarns n2, the outer diameter d2 of the second yarn is 20%-30% smaller than the outer diameter d1 of the first yarn. Specifically, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, or 30% can be selected as needed.

[0051] When the number of first yarns n1 is equal to the number of second yarns n2, by controlling the outer diameter d2 of the second yarn to be 10%-40% smaller than the outer diameter d1 of the first yarn, the edge sealing portion 12 can effectively reduce its thickness while maintaining a similar strength to the main body portion 11, excluding the 40%.

[0052] This reduces edge bursting during the winding process of the edge-sealing fiberglass cloth 1, while improving its stability and reliability.

[0053] In the second embodiment, when the outer diameter d1 of the first yarn is equal to the outer diameter d2 of the second yarn, the number of yarns n2 of the second yarn is 10%-40% smaller than the number of yarns n1 of the first yarn, excluding 40%. It can be understood that when d1=d2, the range of n2 is [(1-0.4)×n1,(1-0.1)×n1], that is, the range of n2 is [0.6n1,0.9n1].

[0054] Preferably, when the outer diameter d1 of the first yarn is equal to the outer diameter d2 of the second yarn, the number of yarns n2 of the second yarn is 20%-30% smaller than the number of yarns n1 of the first yarn. Specifically, it can be 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29% or 30% as needed.

[0055] When the outer diameter d1 of the first yarn is equal to the outer diameter d2 of the second yarn, by controlling the number of the second yarn n2 to be 10%-40% smaller than the number of the first yarn n1, the edge sealing part 12 can effectively reduce its thickness while maintaining a similar strength to the main body part 11, excluding the 40%.

[0056] This reduces edge bursting during the winding of the edge-sealing fiberglass cloth 1, while improving the stability and reliability of the edge-sealing fiberglass cloth 1 during the winding process.

[0057] The edge-sealing fiberglass cloth 1 also includes a slurry layer that covers both the main body 11 and the edge-sealing part 12, and the thickness of the slurry layer is consistent from the main body 11 to the edge-sealing part 12.

[0058] The coverage area of ​​the slurry layer extends from the main body 11 of the edge-sealing fiberglass cloth 1 to the edge-sealing portion 12, and the thickness of the slurry layer remains consistent throughout the coverage area. Through precise coating processes and quality control, the consistent thickness of the slurry layer from the main body 11 to the edge-sealing portion 12 ensures that the slurry layer performs the same function and effect on both the main body 11 and the edge-sealing portion 12.

[0059] In this application, the slurry layer covers both the main body 11 and the edge sealing portion 12 of the edge sealing fiberglass cloth 1. During the copper clad laminate manufacturing process, the slurry layer can increase the bonding strength between the edge sealing fiberglass cloth 1 and materials such as resin or metal. At the same time, the slurry layer covers the outer surface of the edge sealing fiberglass cloth 1, which can effectively prevent the damage of the external environment to the edge sealing fiberglass cloth 1 and help extend the service life of the edge sealing fiberglass cloth 1.

[0060] The edge-sealing fiberglass cloth 1 also includes a coupling agent covering the outside of the slurry layer, and the thickness of the coupling agent is consistent from the main body 11 to the edge-sealing part 12.

[0061] A coupling agent is further coated on the outside of the slurry layer, with a consistent thickness across the entire coverage area from the main body 11 to the edge sealing portion 12. This consistent thickness of the coupling agent from the main body 11 to the edge sealing portion 12 is achieved through precise coating processes and quality control, ensuring that the coupling agent performs the same function and effect on both the main body 11 and the edge sealing portion 12.

[0062] The coupling agent covers the outside of the slurry layer and comes into direct contact with the external environment or subsequent processing materials, thereby improving the bonding strength between the edge-sealing fiberglass cloth 1 and other materials.

[0063] The coupling agent is one or a mixture of aminosilane coupling agents, epoxysilane coupling agents, double-bond silane coupling agents, methacrylate-based silane coupling agents, or thiol-based silane coupling agents.

[0064] Among them, aminosilane coupling agents contain amino functional groups, which can react with the hydroxyl groups on the surface of the edge-sealing fiberglass cloth 1 and the carbonyl groups in the resin to form strong chemical bonds and enhance interfacial adhesion. Epoxysilane coupling agents have highly reactive epoxy groups, are compatible with various resin systems, and achieve interfacial cross-linking through ring-opening reactions, improving the material's heat resistance and mechanical properties. Double-bond silane coupling agents have double-bond structures that can participate in free radical polymerization reactions, forming covalent bonds with the resin to enhance interfacial compatibility, making them suitable for unsaturated resin systems. Methacrylate-based silane coupling agents combine the characteristics of silane coupling agents and methacrylate functional groups, reacting with the surface of the edge-sealing fiberglass cloth 1 and participating in resin polymerization, improving interfacial adhesion and overall material performance. Thiol-based silane coupling agents have thiol groups with strong reducing properties, forming stable complexes with metal ions, suitable for strengthening the bond between metal substrates and edge-sealing fiberglass cloth 1, while also improving the material's corrosion resistance.

[0065] Different coupling agents can be mixed and used according to actual application requirements to achieve synergistic effects and further optimize the overall performance of the edge-sealing fiberglass cloth 1. Aminosilane coupling agents focus more on improving bond strength, while epoxysilane coupling agents focus more on improving heat resistance or chemical corrosion resistance. By rationally selecting and mixing these coupling agents, multifaceted optimization of the performance of the edge-sealing fiberglass cloth 1 can be achieved.

[0066] The edge sealing portion 12 has a first width, which ranges from 0.1mm to 10mm.

[0067] Preferably, the first width is 1mm, 2mm, 3mm, 4mm or 5mm.

[0068] The edge-sealing fiberglass cloth 1 includes weft yarns 20 threaded through the first warp yarn 21 and the second warp yarn 22, and the diameter of the weft yarns 20 is the same from the main body portion 11 to the edge-sealing portion 12.

[0069] Multiple sets of weft yarns 20 of the edge sealing fiberglass cloth 1 are continuously threaded between the first warp yarn 21 of the main body 11 and the second warp yarn 22 of the edge sealing part 12, so that the edge sealing fiberglass cloth 1 forms an uninterrupted fabric structure in the extension direction of the weft yarns 20. At the same time, the weft yarns 20 can evenly disperse the stress between the first warp yarn 21 or the second warp yarn 22 during the threading process, thereby enhancing the overall tear resistance.

[0070] The diameter of the weft yarn 20 in the main body 11 of the edge-sealing fiberglass cloth 1 is the same as the diameter of the weft yarn 20 in the edge-sealing part 12 of the edge-sealing fiberglass cloth 1. This ensures the consistency of the mechanical and thermal properties of the edge-sealing fiberglass cloth 1 in the two different areas of the main body 11 and the edge-sealing part 12. For example, the tensile strength and the coefficient of thermal expansion are consistent, avoiding the impact of local performance differences on the overall uniformity of the edge-sealing fiberglass cloth 1.

[0071] The first warp yarn 21, the second warp yarn 22, and the weft yarn 20 are made of the same material.

[0072] The chemical composition of the first warp yarn 21, the second warp yarn 22 and the weft yarn 20 contains silicon dioxide (SiO2), aluminum oxide (Al2O3), calcium and magnesium oxides (CaO, MgO), alkali metal oxides (Na2O, K2O) and boron oxide (B2O).

[0073] Among them, silicon dioxide (SiO2) is the main component of the edge-sealing fiberglass cloth 1, usually accounting for more than 50%, and silicon dioxide (SiO2) provides the edge-sealing fiberglass cloth 1 with good resistance to acid and alkali corrosion; aluminum oxide (Al2O3) can improve the tensile strength and modulus of the edge-sealing fiberglass cloth 1 and optimize the dielectric properties of the edge-sealing fiberglass cloth 1; calcium and magnesium oxides (CaO, MgO) are used to adjust the coefficient of thermal expansion of the edge-sealing fiberglass cloth 1; alkali metal oxides (Na2O, K2O) improve the fiber drawing efficiency of the edge-sealing fiberglass cloth 1 in the production process; boron oxide (B2O) can reduce the dielectric constant and loss factor of the edge-sealing fiberglass cloth 1, making it suitable for high-frequency communication fields.

[0074] The first warp yarn 21, the second warp yarn 22, and the weft yarn 20 are made of the same material, which can ensure that the edge sealing fiberglass cloth 1 has the same chemical properties as a whole, such as corrosion resistance and coefficient of thermal expansion, and at the same time ensure that the edge sealing fiberglass cloth 1 has consistent mechanical properties as a whole, such as tension control ability and load-bearing capacity.

[0075] The density of the edge-sealing fiberglass cloth is a×b, where a is the number of the first warp and / or the second warp per unit inch, and the value of a ranges from 30 to 120; b is the number of weft yarns per unit inch, and the value of b ranges from 10 to 120.

[0076] The density of edge-sealing fiberglass cloth refers to the product of the total number of warp yarns (a) and the total number of weft yarns (b) within a length and width of one inch.

[0077] Wherein, the value of 'a' ranges from 30 to 120, preferably from 40 to 70. The value of 'b' ranges from 10 to 120, preferably from 30 to 70.

[0078] Taking 'a' as an example, the value of 'a' ranges from 30 to 120. When 'a' is 30, the number of the first and / or second warp yarns per unit inch is relatively small, the warp spacing of the edge-sealing fiberglass cloth is larger, and the fabric surface is relatively loose, giving the edge-sealing fiberglass cloth good breathability and flexibility, making it suitable for some applications where breathability is required and high tensile strength is not necessary. When 'a' is 120, the number of warp yarns per unit inch is larger, the warp spacing is smaller, the fabric surface is denser, and the tensile strength of the edge-sealing fiberglass cloth can be significantly improved.

[0079] When the value of a is in the range of 40-70, the edge-sealing fiberglass cloth achieves a good balance between flexibility and tensile strength, which can meet certain bending and deformation requirements while also possessing certain tensile strength.

[0080] The density of the edge-sealing fiberglass cloth is set according to actual needs, and this application does not impose specific restrictions.

[0081] This application also provides a semi-cured sheet, comprising the aforementioned edge-sealing fiberglass cloth 1 and resin.

[0082] The resin impregnates the edge-sealing fiberglass cloth 1 in solution form and penetrates into the interior of the edge-sealing fiberglass cloth 1, filling the gaps between the first warp yarn 21, the second warp yarn 22 and the weft yarn 20. With the filling and curing of the resin and other process steps, a semi-cured sheet is formed.

[0083] In the prepreg, the edge-sealing fiberglass cloth 1 and the resin can be configured as a laminated structure. Through the interaction between the resin and the edge-sealing fiberglass cloth 1, the resin and the edge-sealing fiberglass cloth 1 are tightly bonded together to form a whole. Depending on the actual application requirements, the prepreg can contain a single layer or a composite structure of multiple layers of edge-sealing fiberglass cloth 1 and resin.

[0084] In practical applications, the composite structure of single-layer edge-sealing fiberglass cloth 1 and resin is suitable for scenarios with relatively low requirements for thickness and performance, and can meet basic functions such as insulation and support. On the other hand, the composite structure of multi-layer edge-sealing fiberglass cloth 1 and resin can achieve more complex performance requirements through the combination of edge-sealing fiberglass cloth 1 and resin between different layers, such as improving mechanical strength, improving electrical performance, and enhancing heat resistance, so as to meet the diverse needs of different fields and application scenarios.

[0085] The resin contains at least one of the following: epoxy resin, maleimide resin, phenolic resin, polyphenylene ether resin, cyanate ester resin, benzoxazine resin, hydrocarbon resin, and active ester compound.

[0086] Among them, epoxy resin has excellent adhesion, chemical corrosion resistance and electrical insulation; maleimide resin has high heat resistance and good mechanical properties; phenolic resin has good heat resistance, flame retardancy and dimensional stability; polyphenylene ether resin and cyanate ester resin have excellent electrical insulation, low dielectric constant and low dielectric loss; benzoxazine resin combines the advantages of epoxy resin and phenolic resin; hydrocarbon resin has good heat resistance, low water absorption and low dielectric constant. Active ester compounds can be used as curing agents for epoxy resin. After reacting with epoxy resin, they can form a cross-linked structure with good heat resistance and electrical properties, improving the overall performance of the prepreg.

[0087] By rationally selecting and combining resin components, prepregs with specific properties can be prepared to meet the needs of different fields such as electronics, electrical engineering, and aerospace for prepreg materials.

[0088] This application relates to a fiberglass sealing cloth 1 and a prepreg using the same, comprising a main body portion 11 and a sealing portion 12 connected to each other. The main body portion 11 includes a first warp 21, and the sealing portion 12 includes a second warp 22. The outer diameter of the second warp 22 is 10%-40% smaller than the outer diameter of the first warp 21, excluding 40%. By reasonably controlling the reduction ratio between the outer diameter of the warp of the sealing portion 12 and the outer diameter of the warp of the main body portion 11, this application can effectively reduce the sealing thickness, thus avoiding edge fraying of the fiberglass sealing cloth 1 and preventing breakage of the fiberglass sealing cloth 1 due to a thinner sealing layer. The uniform thickness of the sealing portion 12 of the fiberglass sealing cloth 1 reduces edge wrinkling when pressing thin copper plates, effectively improving product quality.

[0089] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "specifically," or "optional embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0090] This application has been described with reference to the above-mentioned embodiments; however, the above embodiments are merely examples for implementing this application. It must be noted that the disclosed embodiments do not limit the scope of this application. On the contrary, any modifications and refinements made without departing from the spirit and scope of this application are within the scope of patent protection of this application.

Claims

1. A type of edge-sealing fiberglass cloth, characterized in that, It includes a main body and an edge sealing part that are interconnected. The main body includes a first warp yarn, and the edge sealing part includes a second warp yarn. The outer diameter of the second warp yarn is 10%-40% smaller than that of the first warp yarn, excluding 40%.

2. The edge-sealing fiberglass cloth according to claim 1, characterized in that, The main body has a first thickness, and the edge sealing part has a second thickness, wherein the first thickness is 0.002mm-0.010mm greater than the second thickness.

3. The edge-sealing fiberglass cloth according to claim 1, characterized in that, The first warp yarn includes a first yarn filament in a first number of yarns, and the second warp yarn includes a second yarn filament in a second number of yarns; The first number of yarns is equal to the second number of yarns, and the outer diameter of the second yarn is 10%-40% smaller than the outer diameter of the first yarn, excluding 40%.

4. The edge-sealing fiberglass cloth according to claim 1, characterized in that, The first warp yarn includes a first yarn filament in a first number of yarns, and the second warp yarn includes a second yarn filament in a second number of yarns; The outer diameter of the first yarn is equal to the outer diameter of the second yarn, and the number of yarns in the second yarn is 10%-40% smaller than the number of yarns in the first yarn, excluding 40%.

5. The edge-sealing fiberglass cloth according to claim 1, characterized in that, The edge-sealing fiberglass cloth also includes a slurry layer that covers both the main body and the edge-sealing portion, and the thickness of the slurry layer is consistent from the main body to the edge-sealing portion.

6. The edge-sealing fiberglass cloth according to claim 5, characterized in that, The edge-sealing fiberglass cloth also includes a coupling agent covering the outside of the slurry layer, and the thickness of the coupling agent is consistent from the main body to the edge-sealing part.

7. The edge-sealing fiberglass cloth according to claim 1, characterized in that, The edge sealing portion has a first width, which ranges from 0.1mm to 10mm.

8. The edge-sealing fiberglass cloth according to claim 1, characterized in that, The edge-sealing fiberglass cloth includes weft yarns threaded through the first warp yarn and the second warp yarn, and the diameter of the weft yarns is the same from the main body to the edge-sealing part.

9. The edge-sealing fiberglass cloth according to claim 8, characterized in that, The density of the edge-sealing fiberglass cloth is a×b, where a is the number of the first warp and / or the second warp per unit inch, and the value of a ranges from 30 to 120; b is the number of weft yarns per unit inch, and the value of b ranges from 10 to 120.

10. A semi-cured sheet, characterized in that, Includes the edge-sealing fiberglass cloth as described in any one of claims 1-9.

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