Flame-retardant high-candidate-resistance reinforcing plate for FFC (Flexible Flat Cable) wire rod

Abstract

The utility model discloses a flame-retardant high-weather-resistance reinforcing plate for an FFC wire rod. The flame-retardant high-weather-resistance reinforcing plate comprises a base film layer, a flame-retardant adhesive layer, an electromagnetic shielding layer and a high-adhesion high-weather-resistance layer, the base film layer, the electromagnetic shielding layer and the high-adhesion and high-weather-resistance layer are sequentially stacked from top to bottom; the number of the flame-retardant adhesive layers is at least two, one flame-retardant adhesive layer is located between the base film layer and the electromagnetic shielding layer, and the other flame-retardant adhesive layer is located between the electromagnetic shielding layer and the high-adhesion and high-weather-resistance layer. And the high-adhesion and high-weather-resistance layer is formed by coating a polyester modified acrylic resin solution. The flame-retardant high-weather-resistance reinforcing plate for the FFC wire rod provided by the utility model not only has flame retardance, but also has high weather resistance, so as to meet the application requirements in a high-temperature and high-humidity environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to FFC wire rod technical field especially, it is a kind of high weatherability reinforcing plate with flame retardance for FFC wire rod. BACKGROUND

[0002] FFC (Flexible Flat Cable) is a new type of data cable made by hot-pressing with hot melt adhesive film and extremely thin tinned flat copper wire on base material through automatic roll pressing compound machine, which has the characteristics of softness, small size, light weight and high wire harness integration, and is widely used not only in traditional fields such as printers, plotters and copiers, but also in emerging fields such as notebook computers, plotters and automobiles.

[0003] The reinforcing plate is designed to be placed at the end of the FFC (Flexible Flat Cable) wire rod, which usually includes a base film layer and an adhesive layer, and is tightly bonded to the FFC wire rod through its adhesive layer to ensure the stability of the FFC wire rod installation and reliable connection between the FFC wire rod and the electrical components. However, in actual application, the FFC wire rod is usually used in high temperature and high humidity environment, and the moisture in the above harsh environment can invade the adhesive layer, gradually weakening the interfacial bonding force between the adhesive layer and the FFC wire rod, resulting in a decrease in the bonding strength between the reinforcing plate and the FFC wire rod. At the same time, the above harsh environment also easily accelerates the oxidation and decomposition of the adhesive layer, resulting in further decrease in the bonding strength between the reinforcing plate and the FFC wire rod. The combined effect of the above two aspects makes the bonding between the reinforcing plate and the FFC wire rod weak, increasing the risk of the reinforcing plate falling off, resulting in the reinforcing plate easily losing its intended function. In addition, due to its structural characteristics, the existing reinforcing plate also has limited flame retardancy, which cannot meet the requirements of places with high flame retardancy requirements.

[0004] In view of the above problems existing in the reinforcing plate industry, it is imperative to develop a reinforcing plate with both flame retardancy and high weather resistance to meet the application requirements in high temperature and high humidity environment. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a high weatherability reinforcing plate with flame retardancy for FFC wire rod, which has both flame retardancy and high weather resistance to meet the application requirements in high temperature and high humidity environment and overcome the shortcomings in the prior art.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A high weatherability reinforcing plate with flame retardancy for FFC wire rod, comprising a base film layer, a flame-retardant adhesive layer, an electromagnetic shielding layer and a high-adhesion high-weather-resistance layer; the base film layer, the electromagnetic shielding layer and the high-adhesion high-weather-resistance layer are sequentially stacked from top to bottom;

[0008] The number of the fire-retardant adhesive layers is at least two, and one of the fire-retardant adhesive layers is located between the base film layer and the electromagnetic shielding layer, and the other of the fire-retardant adhesive layers is located between the electromagnetic shielding layer and the high-adhesion high-weather-resistance layer.

[0009] The high-adhesion high-weather-resistance layer is coated by using a polyester modified acrylic resin solution.

[0010] Further, the thickness of the high-adhesion high-weather-resistance layer is 25-45 microns.

[0011] Further, the thickness of the base film layer is 100-150 microns.

[0012] Further, the thickness of the fire-retardant adhesive layer 2 is 1-3 microns.

[0013] Further, the thickness of the electromagnetic shielding layer is 9-20 microns.

[0014] Further, an adhesion-increasing layer is further included, and the adhesion-increasing layer is attached to the bottom of the base film layer.

[0015] Further, the thickness of the adhesion-increasing layer is 1-2 microns.

[0016] Further, a release film layer is further included, and the release film layer is located at the bottom of the high-adhesion high-weather-resistance layer.

[0017] Further, the thickness of the release film layer is 1-2 microns.

[0018] Further, the base film layer is an aramid film, and the material of the electromagnetic shielding layer is an aluminum foil.

[0019] The technical scheme provided by the utility model can have the following beneficial effects:

[0020] 1. The number of the fire-retardant adhesive layers is at least two, and the fire-retardant adhesive layers are respectively located between the base film layer and the electromagnetic shielding layer and between the electromagnetic shielding layer and the high-adhesion high-weather-resistance layer. The double fire-retardant barriers formed by the two fire-retardant adhesive layers effectively improve the overall fire-retardant performance of the reinforcing plate. In addition, the fire-retardant adhesive layers tightly connect the base film layer and the electromagnetic shielding layer and the electromagnetic shielding layer and the high-adhesion high-weather-resistance layer together, which is beneficial to enhancing the overall structural stability of the reinforcing plate and improving the mechanical properties such as tensile resistance and tear resistance.

[0021] 2, the high adhesion and high weather resistance layer is coated by a polyester modified acrylic resin solution, the polyester modified acrylic resin has high adhesion of polyester resin and high temperature resistance and high humidity resistance of acrylic resin, the high adhesion and high weather resistance layer coated by the polyester modified acrylic resin solution has high adhesion, high temperature resistance and high humidity resistance.The above-mentioned properties of the high adhesion and high weather resistance layer not only enable it to be firmly adhered to the flame-retardant adhesive layer, ensure the integrity and stability of the reinforcing plate, but also increase the weather resistance such as high temperature resistance and high humidity resistance of the reinforcing plate, so that the reinforcing plate can meet the use requirements even if it is used in a high temperature and high humidity environment. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic diagram of a high weather resistance reinforcing plate for FFC wire with flame retardance.

[0023] Among them: base film layer 1, flame-retardant adhesive layer 2, electromagnetic shielding layer 3, high adhesion and high weather resistance layer 4, tackifying layer 5, release film layer 6. DETAILED DESCRIPTION

[0024] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0025] The technical scheme provides a high weather resistance reinforcing plate for FFC wire with flame retardance, comprising a base film layer 1, a flame-retardant adhesive layer 2, an electromagnetic shielding layer 3 and a high adhesion and high weather resistance layer 4; the base film layer 1, the electromagnetic shielding layer 3 and the high adhesion and high weather resistance layer 4 are sequentially stacked from top to bottom;

[0026] The number of the flame-retardant adhesive layer 2 is at least two, and one of the flame-retardant adhesive layers 2 is located between the base film layer 1 and the electromagnetic shielding layer 3, and the other of the flame-retardant adhesive layers 2 is located between the electromagnetic shielding layer 3 and the high adhesion and high weather resistance layer 4;

[0027] The high adhesion and high weather resistance layer 4 is coated by a polyester modified acrylic resin solution.

[0028] In order to make the reinforcing plate have both flame retardance and high weather resistance, and meet the application requirements in a high temperature and high humidity environment, the technical scheme provides a high weather resistance reinforcing plate for FFC wire with flame retardance, comprising a base film layer 1, a flame-retardant adhesive layer 2, an electromagnetic shielding layer 3 and a high adhesion and high weather resistance layer 4. Among them, the base film layer 1 not only has flexibility and high strength for enhancing the stability of the overall structure, but also has excellent high temperature resistance, high humidity resistance and flame retardance, ensuring the weather resistance and flame retardance of the reinforcing plate.

[0029] The number of the flame-retardant adhesive layer 2 is at least two, and is respectively located between the base film layer 1 and the electromagnetic shielding layer 3 and between the electromagnetic shielding layer 3 and the high-adhesion high-weather-resistance layer 4. The setting of the two layers of the flame-retardant adhesive layer forms a double flame-retardant barrier, effectively improving the overall flame-retardant performance of the reinforcing plate. In addition, the flame-retardant adhesive layer 2 tightly connects the base film layer 1 and the electromagnetic shielding layer 3 and the electromagnetic shielding layer 3 and the high-adhesion high-weather-resistance layer 4, which is beneficial to enhancing the overall structural stability of the reinforcing plate and improving its mechanical properties such as tensile resistance and tear resistance. It should be noted that the flame-retardant adhesive layer 2 is coated by using the existing conventional flame-retardant polyester adhesive, hard polyurethane flame-retardant adhesive or flame-retardant polyimide resin adhesive on the market.

[0030] The electromagnetic shielding layer 3 can absorb, reflect or offset external electromagnetic waves, prevent interference and radiation of external electromagnetic waves, and meet the use environment with high requirements for electromagnetic shielding performance.

[0031] The high-adhesion high-weather-resistance layer 4 is coated by a polyester modified acrylic resin solution. The polyester modified acrylic resin has high adhesion performance of polyester resin and high temperature resistance and high humidity resistance of acrylic resin, so that the high-adhesion high-weather-resistance layer 4 coated by the polyester modified acrylic resin solution has high adhesion performance, high temperature resistance and high humidity resistance. The above-mentioned performance of the high-adhesion high-weather-resistance layer 4 not only enables it to be firmly adhered to the flame-retardant adhesive layer 2, ensures the integrity and stability of the reinforcing plate, but also increases the weather resistance such as high temperature resistance and high humidity resistance of the reinforcing plate, so that the reinforcing plate can meet the use requirements even if it is used in a high temperature and high humidity environment.

[0032] In addition, the polyester modified acrylic resin also has good chemical corrosion resistance, can resist the erosion of various chemicals (such as acid, alkali and salt, etc.), and is beneficial to prolonging the service life of the high-adhesion high-weather-resistance layer 4 and the entire reinforcing plate. In addition, the high gloss and transparency of the polyester modified acrylic resin endow the high-adhesion high-weather-resistance layer 4 with a bright and high-quality appearance, thereby improving the overall aesthetics of the reinforcing plate.

[0033] It should be noted that the polyester modified acrylic resin solution can be a polyester modified acrylic resin solution of model J-693 produced by Shanghai Kaijin Chemical Co., Ltd., and the specific type is not limited herein.

[0034] Therefore, the base film layer 1, the flame-retardant adhesive layer 2, the electromagnetic shielding layer 3 and the high-adhesion high-weather-resistance layer 4 cooperate with each other in the technical scheme, not only make the reinforcing plate have both flame retardancy and high weather resistance to meet the application requirements in a high temperature and high humidity environment, but also are beneficial to improving the overall aesthetics of the reinforcing plate. In addition, the structure of the reinforcing plate of the technical scheme is relatively simple, which is beneficial to large-scale production.

[0035] Further, the thickness of the high-adhesion high-weatherability layer 4 is 25-45 microns.

[0036] If the thickness of the high-adhesion high-weatherability layer 4 is greater than 45 microns, the stress inside the high-adhesion high-weatherability layer 4 will increase, which may cause cracking, peeling and other adverse phenomena, thereby weakening the overall weatherability. In addition, when the thickness of the high-adhesion high-weatherability layer 4 is too thick, the production cost will increase, but the performance improvement is not significant; if the thickness of the high-adhesion high-weatherability layer 4 is less than 25 microns, the adhesion and weatherability of the high-adhesion high-weatherability layer 4 will decrease. Therefore, the thickness of the high-adhesion high-weatherability layer 4 is preferably 25-45 microns, which is conducive to ensuring the weatherability of the reinforcing plate at a lower cost.

[0037] Further, the thickness of the base film layer 1 is 100-150 microns.

[0038] If the thickness of the base film layer 1 is greater than 150 microns, the hardness of the obtained reinforcing plate is higher, and the thickness of the obtained reinforcing plate increases, which increases the production cost and transportation cost; if the thickness of the base film layer 1 is less than 100 microns, the obtained reinforcing plate is soft and the strength decreases, which is easy to damage during use and affects the service life. Therefore, the thickness of the base film layer 1 is preferably 100-150 microns, so that the hardness of the obtained reinforcing plate is moderate, which is conducive to reducing the transportation cost and production cost on the premise of ensuring the service life.

[0039] Further, the thickness of the flame-retardant adhesive layer 2 is 1-3 microns.

[0040] If the thickness of the flame-retardant adhesive layer 2 is less than 1 micron, the flame-retardant performance of the reinforcing plate is affected, and the adhesion stability between the base film layer 1 and the electromagnetic shielding layer 3 is poor, which affects the overall adhesion strength of the reinforcing plate; if the thickness of the flame-retardant adhesive layer 2 is greater than 3 microns, the production cost of the reinforcing plate is easy to increase, and overflow is easy to occur, which causes the flame-retardant adhesive layer 2 to shift. Therefore, the thickness of the flame-retardant adhesive layer 2 is limited to 1-3 microns, which is not only conducive to saving production cost, but also conducive to ensuring the flame-retardant performance and overall adhesion strength of the reinforcing plate.

[0041] Further, the thickness of the electromagnetic shielding layer 3 is 9-20 microns.

[0042] If the thickness of the electromagnetic shielding layer 3 is less than 9 microns, the electromagnetic shielding performance is not enough, which will affect the electromagnetic shielding performance of the reinforcing plate; if the thickness of the electromagnetic shielding layer 3 is greater than 20 microns, the electromagnetic shielding performance of the reinforcing plate does not improve significantly, and the thickness of the reinforcing plate will increase, which is easy to increase the production cost and transportation cost. Therefore, the thickness of the electromagnetic shielding layer 3 is preferably 9-20 microns, which is not only conducive to saving production cost and transportation cost, but also conducive to ensuring the electromagnetic shielding performance of the reinforcing plate.

[0043] Further, the adhesive layer 5 is adhered to the bottom of the base film layer 1.

[0044] By arranging the adhesive layer 5, the adhesion between the base film layer 1 and the flame-retardant adhesive layer 2 on the top of the electromagnetic shielding layer 3 is increased, and the flame-retardant adhesive layer 2 on the top of the electromagnetic shielding layer 3 is prevented from falling off during use, thereby further ensuring the flame retardancy of the product.

[0045] It should be noted that the adhesive layer 5 is coated by using an existing adhesion promoter on the market.

[0046] Further, the thickness of the adhesive layer 5 is 1-2 μm.

[0047] If the thickness of the adhesive layer 5 is <1 μm, the adhesion between the base film layer 1 and the flame-retardant adhesive layer 2 on the top of the electromagnetic shielding layer 3 is not greatly increased, and the contribution to the adhesion between the base film layer 1 and the flame-retardant adhesive layer 2 on the top of the electromagnetic shielding layer 3 is small; if the thickness of the adhesive layer 5 is >2 μm, the adhesion between the base film layer 1 and the flame-retardant adhesive layer 2 on the top of the electromagnetic shielding layer 3 is not greatly improved, and the cost is increased. Therefore, the thickness of the adhesive layer 5 is limited to 1-2 μm in the technical solution, so that the flame-retardant adhesive layer 2 on the top of the electromagnetic shielding layer 3 is well adhered to the base film layer 1 and will not fall off in a high-temperature and high-humidity environment, thereby improving the weather resistance of the reinforcing plate.

[0048] Further, the release film layer 6 is arranged at the bottom of the high-adhesion and high-weather-resistance layer 4.

[0049] The release film layer 6 is used to prevent the high-adhesion and high-weather-resistance layer 4 from being contaminated by the outside and maintain the adhesion performance thereof. It should be noted that the release film layer 6 can be a PE film, a PET film, or the like, and the specific type is not limited herein.

[0050] Further, the thickness of the release film layer 6 is 1-2 μm.

[0051] If the thickness of the release film layer 6 is <1 μm, the thickness is too thin, and the release film layer 6 is prone to slipping or wrinkling during the process of being adhered to the high-adhesion and high-weather-resistance layer 4, thereby affecting the appearance of the product; if the thickness of the release film layer 6 is >2 μm, the thickness is too thick, which leads to an increase in the cost of materials and causes waste of resources. Therefore, the thickness of the release film layer 6 is preferably 1-2 μm in the technical solution, which reduces the production cost on the premise of ensuring the appearance of the product.

[0052] Further, the base film layer 1 is an aramid film, and the material of the electromagnetic shielding layer 3 is an aluminum foil.

[0053] The aramid film has excellent high-temperature resistance, high-humidity resistance and flame resistance. Therefore, the base film layer 1 is preferably aramid film, which is beneficial to ensure the flame resistance and weather resistance of the reinforcing plate.

[0054] Further, the aluminum foil can efficiently reflect electromagnetic waves, reduce multiple reflections and leakage of electromagnetic waves in the shielding layer, and improve the shielding performance. In addition, the aluminum foil has the advantages of small density and low cost. Therefore, the material of the electromagnetic shielding layer 3 is preferably aluminum foil, which is not only beneficial to reduce the weight and production cost of the reinforcing plate, but also beneficial to improve the shielding performance.

[0055] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0056] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless otherwise specifically stated. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in proportion to the actual proportions. The techniques, methods and devices known to those skilled in the relevant art can not be discussed in detail, but under appropriate circumstances, the techniques, methods and devices should be considered as part of the authorized specification. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so further discussion is not needed if an item is defined in one drawing.

[0057] In the description of the present application, it should be understood that the orientation words such as "front, rear, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and in the absence of contrary statements, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0058] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical", "horizontal", and derivatives thereof (e.g., "vertical ly", "horizontal ly", etc.) can refer to the relative positions of an apparatus or feature as shown in the drawings, and shall not be construed as limiting the present application to any particular spatial orientation. Furthermore, the terms "first", "second", third", etc. can be used herein to describe various components, but such components should not be limited by these terms. Such terms can be used interchangeably with appropriate spatial terms and / or other descriptive terms to describe the same components.

[0059] In addition, it should be pointed out that the use of the words "first", "second" and the like to describe various components is merely intended to distinguish similar components from each other, and such words do not have special meanings unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

[0060] It should be pointed out that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein.

[0061] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only to explain the principles of the present application, and cannot be interpreted in any way as limiting the scope of protection of the present application. Based on the explanation here, those skilled in the art can think of other specific embodiments of the present application without creative labor, and these embodiments will fall within the scope of protection of the present application.

Claims

1. A high-weather-resistant reinforcing sheet for FFC wire having flame retardancy, characterized by: The base film layer, the electromagnetic shielding layer and the high adhesion and high weather resistance layer are sequentially stacked from top to bottom. The number of the fire-retardant adhesive layers is at least two, one of which is located between the base film layer and the electromagnetic shielding layer, and the other is located between the electromagnetic shielding layer and the high adhesion and high weather resistance layer. The high adhesion and high weather resistance layer is formed by coating a polyester modified acrylic resin solution.

2. The high weather-resistant reinforcing plate for FFC wire with flame retardance according to claim 1, characterized in that: The thickness of the high adhesion and high weather resistance layer is 25-45 μm.

3. The high weather-resistant reinforcing plate for FFC wire with flame retardance according to claim 1, characterized in that: The thickness of the base film layer is 100-150 μm.

4. The high weather-resistant reinforcing plate for FFC wire with flame retardance according to claim 1, characterized in that: The thickness of the fire-retardant adhesive layer is 1-3 μm.

5. The high weather-resistant reinforcing plate for FFC wire with flame retardance according to claim 1, characterized in that: The thickness of the electromagnetic shielding layer is 9-20 μm.

6. The high weather-resistant reinforcing plate for FFC wire with flame retardance according to claim 1, characterized in that: The thickness of the tackiness layer is 1-2 μm.

7. The high weather-resistant reinforcing plate for FFC wire with flame retardance according to claim 6, characterized in that: The thickness of the release film layer is 1-2 μm.

8. The high weather-resistant reinforcing plate for FFC wire with flame retardance according to claim 1, characterized in that: The base film layer is aramid film, and the material of the electromagnetic shielding layer is aluminum foil.

9. The high weather-resistant reinforcing plate for FFC wire with flame retardance according to claim 8, characterized in that: ​ 10. The high weather-resistant reinforcing plate for FFC wire with flame retardance according to claim 1, characterized in that: ​

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