Soft FFC membrane material with high transmission speed

Abstract

The utility model discloses a flexible FFC membrane material with fast transmission speed, which is used for an FFC cable for high-frequency signal transmission and comprises a base material, a first insulating adhesive layer, an aluminum foil layer, a second insulating adhesive layer, a foaming layer, a third insulating adhesive layer and a release film layer which are sequentially stacked and arranged, the foaming layer is a foaming PE film layer or a foaming PP film layer; the dielectric constant Dk of the FFC membrane material is 2.2 to 2.3, and the loss factor Df of the FFC membrane material is 0.00309 to 0.00351. Compared with the prior art, the flexible FFC film material with the high transmission speed has the advantages that the dielectric constant and the loss factor are small, compared with an FFC wire with the dielectric constant larger than that of the prior art, the flexible FFC film material has the better electric signal transmission speed, the foaming layer can bring better flexibility to the flexible FFC film material with the high transmission speed, and the flexible FFC film material cannot rebound after being bent.

Description

TECHNICAL FIELD

[0001] The utility model relates to FFC wire rod technical field especially relates to a soft and transmission speed fast FFC film material. BACKGROUND

[0002] The prior art FFC wire rod adopts the structure of PET + aluminum foil + PET + pressure sensitive adhesive, and a glue layer is compounded between the PET and the aluminum foil.

[0003] The prior art FFC wire rod has good electrical signal transmission speed, but poor softness, and will rebound when bending, and will break when the bending degree is slightly large. UTILITY MODEL CONTENT

[0004] In view of the above problems, the utility model aims at providing a soft and transmission speed fast FFC film material to solve the problems that the FFC wire rod rebounds when bending and is easy to break.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A soft and transmission speed fast FFC film material is used for the FFC cable for high-frequency signal transmission, which comprises a base material, a first insulating adhesive layer, an aluminum foil layer, a second insulating adhesive layer, a foaming layer, a third insulating adhesive layer and a release film layer arranged in sequence.

[0007] The foaming layer is a foaming PE film layer or a foaming PP film layer.

[0008] The dielectric constant Dk of the FFC film material is 2.2-2.3, and the loss factor Df is 0.00309-0.00351.

[0009] Preferably, the material of the base material is PET.

[0010] And the thickness of the base material is 6 μm.

[0011] Specifically, the first insulating adhesive layer, the second insulating adhesive layer and the third insulating adhesive layer are all modified polyolefin resin coatings.

[0012] Preferably, the thicknesses of the first insulating adhesive layer, the second insulating adhesive layer and the third insulating adhesive layer increase in sequence, and are 3-5 μm, 5-7 μm and 10-40 μm respectively.

[0013] Preferably, the thickness of the aluminum foil layer is 7-20 μm.

[0014] Preferably, the release force of the release film layer is 50-100 g.

[0015] The beneficial effects of the above technical scheme of the utility model are: the FFC film material which is soft and fast in transmission speed, the first insulating adhesive layer, the second insulating adhesive layer and the third insulating adhesive layer have good insulating properties, the dielectric constant and the loss factor are both small, the telecommunication signal transmission speed can be improved, the foaming layer can also bring better softness without breaking, and the foaming layer also will not rebound after being bent. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a cross-sectional structure schematic diagram of one embodiment of the FFC film material which is soft and fast in transmission speed of the utility model;

[0017] Among them: base material 1;First insulating adhesive layer 2;Aluminum foil layer 3;Second insulating adhesive layer 4;Foaming layer 5;Third insulating adhesive layer 6;Release film layer 7. DETAILED DESCRIPTION

[0018] The technical scheme of the utility model is further illustrated by the specific embodiments. Figure 1 The technical scheme of the utility model is further illustrated by the specific embodiments.

[0019] The drawings are only used for example description, and can not be understood as the limitation of the patent; in order to better illustrate the embodiment, some components of the drawings can be omitted, enlarged or reduced, and the size of the actual product is not represented;For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings can be omitted.

[0020] A kind of FFC film material which is soft and fast in transmission speed, for the FFC cable of high-frequency signal transmission, including base material 1, first insulating adhesive layer 2, aluminum foil layer 3, second insulating adhesive layer 4, foaming layer 5, third insulating adhesive layer 6 and release film layer 7 in turn layer arrangement;

[0021] The foaming layer 5 is foamed PE film layer or foamed PP film layer;

[0022] The dielectric constant Dk of the FFC film material is 2.2-2.3, and the loss factor Df is 0.00309-0.00351.

[0023] As Figure 1As shown, the FFC film material which is soft and fast in transmission speed has the aluminum foil layer 3 as a shielding layer, so that the FFC wire material has the anti-electromagnetic interference performance; the first insulating adhesive layer 2 is used for bonding the base material 1 and the aluminum foil layer 3; the FFC film material which is soft and fast in transmission speed and comprises the first insulating adhesive layer 2, the second insulating adhesive layer 4 and the third insulating adhesive layer 6 has good insulation performance; the dielectric constant and the loss factor of the FFC film material which is soft and fast in transmission speed are both small, compared with the FFC wire material with the dielectric constant greater than 3 in the prior art, the FFC film material which is soft and fast in transmission speed has better electric signal transmission speed, and the foaming layer 5 can bring better softness to the FFC film material which is soft and fast in transmission speed, and the FFC film material which is soft and fast in transmission speed will not rebound after being bent.

[0024] Preferably, the material of the base material 1 is PET.

[0025] Preferably, the thickness of the base material 1 is 6 μm.

[0026] The base material 1 with the thickness of 6 μm has better softness and good tensile strength.

[0027] Specifically, the first insulating adhesive layer 2, the second insulating adhesive layer 4 and the third insulating adhesive layer 6 are all modified polyolefin resin coating layers.

[0028] The first insulating adhesive layer 2, the second insulating adhesive layer 4 and the third insulating adhesive layer 6 which are modified polyolefin resin coating layers not only have good heat-resistant adhesive force, but also can improve the bending resistance and tear resistance of the FFC film material which is soft and fast in transmission speed.

[0029] Preferably, the thicknesses of the first insulating adhesive layer 2, the second insulating adhesive layer 4 and the third insulating adhesive layer 6 increase in turn, and are respectively 3-5 μm, 5-7 μm and 10-40 μm.

[0030] The three insulating adhesive layers can ensure that the tensile strength of the FFC film material which is soft and fast in transmission speed is greater than 80 MPa, so that the copper wire in the FFC wire material can not pierce the aluminum foil layer 3 in the use process, thereby preventing the anti-electromagnetic interference performance of the FFC wire material using the FFC film material which is soft and fast in transmission speed from being invalid.

[0031] Preferably, the thickness of the aluminum foil layer 3 is 7-20 μm.

[0032] The thickness of the aluminum foil layer 3 is 7-20 μm, which has relatively low cost and can guarantee the shielding effect of the FFC film material which is soft and fast in transmission speed.

[0033] Preferably, the release force of the release film layer 7 is 50-100 g.

[0034] If the release force is too high, the third insulating layer 6 coated on the release film will be difficult to peel off and will deform during peeling; conversely, if the release force is too low, the third insulating layer 6 will easily detach during baking. Therefore, a release force of 50-100 grams is more suitable.

[0035] In summary, such as Figure 1 The embodiment of the present invention shown has a soft and fast-transmitting FFC film material. The first insulating layer 2, the second insulating layer 4, and the third insulating layer 6 have good insulation properties, and the dielectric constant and loss factor are relatively small, which can improve the transmission speed of electrical signals. The foaming layer 5 can also bring better flexibility and will not break, and will not bounce back after bending.

[0036] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A flexible and high transmission speed FFC film material for a FFC cable for high frequency signal transmission, characterized in that, The base material, the first insulating adhesive layer, the aluminum foil layer, the second insulating adhesive layer, the foaming layer, the third insulating adhesive layer and the release film layer are arranged in sequence. The foaming layer is a foaming PE film layer or a foaming PP film layer. The dielectric constant Dk of the FFC film material is 2.2-2.3, and the loss factor Df is 0.00309-0.00351.

2. The flexible and high-speed transmission FFC film according to claim 1, characterized by, The material of the base material is PET. The thickness of the base material is 6μm.

3. The flexible and high-speed transmission FFC film according to claim 1, characterized by, The first insulating adhesive layer, the second insulating adhesive layer and the third insulating adhesive layer are all modified polyolefin resin coating layers.

4. The flexible and high-speed transmission FFC film according to claim 3, characterized by The thicknesses of the first insulating adhesive layer, the second insulating adhesive layer and the third insulating adhesive layer increase in sequence, and are 3-5μm, 5-7μm and 10-40μm respectively.

5. The flexible and high transmission speed FFC film according to claim 1, wherein The thickness of the aluminum foil layer is 7-20μm.

6. The flexible and high transmission speed FFC film according to claim 1, wherein The release force of the release film layer is 50-100g.

Images