Creep-resistant double-sided tape and flexible folding mobile phone using same

Abstract

The utility model discloses a creep-resistant double-sided adhesive tape and a flexible folding mobile phone using the same, and belongs to the field of adhesive tapes. The double-sided adhesive tape comprises a base material and adhesive layers arranged on the two sides of the base material, the base material is made of fluorine-containing polymer materials or thermoplastic polyester elastomers or ultra-high molecular weight polyethylene, the base material is of a film-shaped structure with the thickness ranging from 0.005 mm to 0.020 mm, the adhesive layers are made of double-sided adhesive or non-setting adhesive materials, the adhesive layer on each side is of a film-shaped structure with the thickness ranging from 0.001 mm to 0.01 mm, and the adhesive layers on the two sides of the base material are of a film-shaped structure with the thickness ranging from 0.001 mm to 0.01 mm. The total thickness of the adhesive layers on the two sides ranges from 0.002 mm to 0.02 mm, and the adhesive layers are matched with the base material in an adhesive mode. According to the utility model, the double-sided adhesive tape is manufactured by adhering the double-sided adhesive tape with smaller thickness to the surfaces of the two sides of the ultra-thin fluorine-containing polymer or the thermoplastic polyester elastomer or the ultra-high molecular weight polyethylene or coating the ultra-thin non-setting adhesive, so that the problem that the double-sided adhesive tape in the prior art cannot meet the thinning requirement and the physical and mechanical property requirement at the same time is solved.

Description

Technical Field

[0001] The utility model belongs to the field of adhesive tapes, in particular to an anti-creep double-sided adhesive tape and a flexible folding mobile phone using the same. Background Art

[0002] The hinge and screen support plate of the flexible folding screen mobile phone are movable parts. In daily use, the bending, opening and closing of the mobile phone will cause abnormal noises due to slight collisions between other parts passing through or crossing the hinge, such as the abnormal noise caused by the collision of the graphene heat sink and the FPC. Therefore, it is necessary to fix the two originally independent components of the graphene heat sink and FPC into a whole to improve this abnormal noise. This anti-creep double-sided tape needs to have physical and mechanical properties such as resistance to bending creep and high tensile strength, and at the same time meet the requirements of thin mobile phones.

[0003] The traditional double-sided tapes on the market mainly include polyester (PET) and polyimide (PI) tapes. Both polyester (PET) and polyimide (PI) tapes are composed of a substrate, double-sided adhesive layers and a release film, wherein the double-sided adhesive layers are made by coating glue on the surface of the substrate layer. The substrate thickness of polyester (PET) and polyimide (PI) is relatively small, so that the total thickness of the substrate and the adhesive layer is about 0.003~0.04mm. Although the thickness can meet the requirements of thinness, the physical and mechanical properties of polyester (PET) and polyimide (PI) materials cannot meet the use requirements. Utility Model Content

[0004] Purpose of the utility model: to provide a creep-resistant double-sided tape and a flexible folding mobile phone using the same, by means of a precision small bonding device or a precision coating device to bond a double-sided tape with a smaller thickness or to coat an ultra-thin self-adhesive adhesive on both sides of an ultra-thin fluorinated polymer or thermoplastic polyester elastomer or ultra-high molecular weight polyethylene substrate to produce a double-sided tape, thereby solving the problem that the double-sided tape of the prior art cannot simultaneously meet the requirements of thinness and physical and mechanical properties.

[0005] The technical solution of the utility model is as follows: in a first aspect, an anti-creep double-sided adhesive tape comprises: a substrate, and adhesive layers arranged on both sides of the substrate.

[0006] The substrate is a fluorine-containing polymer material or a thermoplastic polyester elastomer or an ultra-high molecular weight polyethylene, and the substrate is a film-like structure with a thickness between 0.005 and 0.02 mm.

[0007] The adhesive layer is made of double-sided adhesive or self-adhesive water. The adhesive layer on each side is a film-like structure with a thickness between 0.001 and 0.01 mm. The total thickness of the adhesive layers on both sides is between 0.002 and 0.02 mm.

[0008] The adhesive layer is bonded and matched with the base material.

[0009] In a further embodiment of the first aspect, the anti-creep double-sided tape further includes: a backing layer, which is disposed on one side of the substrate to provide support for the substrate so that the thickness of the substrate and the adhesive layer can be lower.

[0010] In a further embodiment of the first aspect, the anti-creep double-sided tape also includes: two layers of release films, each layer of the release film is bonded to the side of each adhesive layer away from the substrate, providing support for the substrate so that the thickness of the substrate and the adhesive layer can be lower.

[0011] In a further embodiment of the first aspect, the fluorine-containing polymer material is PTFE, PFA, ETFE, FEP, PCTFF, ECTFF, PVDF or PVF.

[0012] In a further embodiment of the first aspect, the thermoplastic polyester elastomer material is TPEE material.

[0013] In a further embodiment of the first aspect, the ultra-high molecular weight polyethylene material is UHMWPE material.

[0014] In a further embodiment of the first aspect, the double-sided tape or self-adhesive tape is made of acrylic glue or silicone glue.

[0015] In the second aspect, a flexible folding mobile phone includes: a mobile phone back cover, a decorative strip, a hinge, a mobile phone middle frame, a first double-sided tape, a graphene heat sink, a second double-sided tape, an FPC, a screen support sheet and a flexible OLED screen.

[0016] The first double-sided tape and / or the second double-sided tape is the base material and adhesive layer of the anti-creep double-sided tape described in any one of the first aspects.

[0017] The decorative strip is connected to the rotating shaft, the mobile phone middle frame is connected to the mobile phone back cover, the rotating shaft is connected to the mobile phone middle frame, and the mobile phone middle frame, the first double-sided tape, the graphene heat sink, the second double-sided tape, the FPC, the screen support sheet and the flexible OLED screen are connected in sequence.

[0018] In a further embodiment of the second aspect, the flexible folding mobile phone also includes: a rotating shaft pressure strip, both ends of which are fixedly connected to the rotating shaft.

[0019] The beneficial effects of the utility model are as follows: the application uses a precision small laminating device or a precision coating device to bond a double-sided adhesive with a small thickness or apply an ultra-thin self-adhesive water on the double-sided surfaces of an ultra-thin fluorinated polymer or thermoplastic polyester elastomer or ultra-high molecular weight polyethylene substrate to make a double-sided tape. Compared with the weak physical and mechanical properties of the traditional polyester (PET) and polyimide (PI) double-sided tapes, this product greatly improves the physical and mechanical properties while meeting the thinning requirements. The total thickness of the substrate and the double-sided adhesive layer of this product can reach between 0.007 and 0.04 mm, which greatly improves the physical and mechanical properties of creep resistance and tensile strength compared to the existing polyester (PET) and polyimide (PI) double-sided tapes, so that the double-sided tape can meet the physical and mechanical performance requirements of flexible folding mobile phones and meet the thinning requirements of the tape, solving the problem that the existing double-sided tape cannot meet the thinning requirements and physical and mechanical performance requirements at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural frame diagram of a finished product of the double-sided adhesive tape of the utility model.

[0021] Figure 2 It is a schematic diagram of an embodiment of the double-sided adhesive tape of the utility model when the substrate layer is used to set the first adhesive layer.

[0022] Figure 3 It is a schematic diagram of an embodiment of the double-sided adhesive tape of the utility model when a release film is used to set a second adhesive layer.

[0023] Figure 4 It is a structural frame diagram of an embodiment of the utility model in which two double-sided adhesive tapes are used on a folding mobile phone that does not pass through a rotating shaft pressure strip.

[0024] Figure 5 The utility model is a structural schematic diagram of an embodiment in which two double-sided adhesive tapes are used on a folding mobile phone that does not pass through a rotating shaft pressure strip, and the mobile phone is in a folded state.

[0025] Figure 6 It is a structural frame diagram of an embodiment of the utility model in which two double-sided adhesive tapes are used on a folding mobile phone passing through a rotating shaft pressure strip.

[0026] Figure 7 The utility model is a structural schematic diagram of an embodiment in which two double-sided adhesive tapes are used on a folding mobile phone passing through a rotating shaft pressure strip, and the mobile phone is in a folded state.

[0027] The reference numerals shown in the figure are: mobile phone back cover 1, decorative strip 2, hinge 3, mobile phone middle frame 4, first double-sided tape 5, graphene heat sink 6, second double-sided tape 7, FPC 8, screen support sheet 9, flexible OLED screen 10, hinge strip 11, substrate 701, adhesive layer 702, release film 703, and backing layer 704. DETAILED DESCRIPTION

[0028] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0029] The present application discloses a creep-resistant double-sided tape and a flexible folding mobile phone using the same. The double-sided tape is produced by bonding double-sided tape of relatively small thickness or coating ultra-thin self-adhesive glue on both sides of an ultra-thin fluorinated polymer or thermoplastic polyester elastomer or ultra-high molecular weight polyethylene substrate through a small precision bonding device or a precision coating device, thereby solving the problem that the double-sided tape of the prior art cannot simultaneously meet the requirements of thinness and physical and mechanical properties.

[0030] In the first embodiment, the anti-creep double-sided tape includes: a substrate 701 , and adhesive layers 702 disposed on both sides of the substrate 701 .

[0031] The substrate 701 is a fluorine-containing polymer material or a thermoplastic polyester elastomer or an ultra-high molecular weight polyethylene, and the substrate 701 is a film structure with a thickness between 0.005 and 0.020 mm.

[0032] The adhesive layer 702 is made of double-sided adhesive or self-adhesive adhesive. The adhesive layer 702 on each side is a film-like structure with a thickness between 0.001 and 0.01 mm. The total thickness of the adhesive layers 702 on both sides is between 0.002 and 0.02 mm.

[0033] The adhesive layer 702 is bonded to the substrate 701 .

[0034] The adhesive layer 702 is bonded to the substrate 701 so that the combination of substrate 701 and adhesive layer 702 of different thicknesses can make the total thickness of the substrate 701 and the adhesive layer 702 between 0.007 and 0.04 mm, preferably between 0.007 and 0.02 mm.

[0035] The substrate 701 and the adhesive layer 702 are combined to form double-sided tapes with different specifications such as thickness of 0.007mm, 0.008mm, 0.009mm, 0.010mm, 0.011mm, 0.012mm, 0.013mm, 0.014mm, 0.015mm, 0.016mm, 0.017mm, 0.018mm, 0.019mm, and 0.020mm.

[0036] In this embodiment, the double-sided tape further includes: a substrate layer 704 disposed on one side of the substrate 701 .

[0037] In this embodiment, the double-sided tape further includes: two layers of release films 703 , each layer of release film 703 is respectively bonded to a side of each adhesive layer 702 away from the substrate 701 .

[0038] The backing layer 704 and the release film 703 can provide support for the substrate 701 during the production process of the double-sided tape, so that the thickness of the substrate 701 can be reduced to between 0.005 and 0.01 mm, and the thickness of the adhesive layer 702 on each side can be reduced to between 0.001 and 0.002 mm.

[0039] like Figure 1 The finished double-sided tape has release films 703 bonded to the double-sided adhesive layers 702 before use, which can also prevent the adhesive layers 702 of the double-sided tape from being contaminated during transportation.

[0040] In this embodiment, the fluorine-containing polymer material is PTFE, PFA, ETFE, FEP, PCTFF, ECTFF, PVDF or PVF.

[0041] In this embodiment, the thermoplastic polyester elastomer material is TPEE material.

[0042] In this embodiment, the ultra-high molecular weight polyethylene material is UHMWPE material.

[0043] In this embodiment, the double-sided adhesive or the self-adhesive adhesive is made of acrylic adhesive or silicone adhesive.

[0044] Working principle: When making a double-sided tape, firstly, a fluorine-containing polymer or a thermoplastic polyester elastomer or an ultra-high molecular weight polyethylene material is made into a film-like substrate 701 of a predetermined thickness.

[0045] Then the material of the substrate layer 704 is attached to one side of the substrate 701. The substrate layer 704 can be disposed on one side of the substrate 701 after undergoing an easy-to-attach surface treatment such as sodium naphthalene treatment or plasma treatment and / or coating or gluing. Depending on the design requirements, the easy-to-attach surface treatment may not be performed.

[0046] The double-sided adhesive material is made into a film-like adhesive layer 702 of a predetermined thickness, and then the substrate 701 is subjected to a surface treatment for easy adhesion such as sodium naphthalene treatment or plasma treatment. Depending on the design requirements, the surface treatment for easy adhesion may not be performed. Then, a precision small bonding device is used to make the double-sided adhesive material adhesive layer 702 be able to adhere to the substrate 701. Figure 2 As shown, the first adhesive layer 702 is formed on the side of the ultra-thin fluorine-containing polymer or thermoplastic polyester elastomer or ultra-high molecular weight polyethylene material substrate 701 away from the substrate layer 704. In this process, the substrate layer 704 provides support for the substrate 701.

[0047] Alternatively, the adhesive water is precisely coated on the substrate 701 which has been subjected to the easy-to-attach surface treatment such as naphthalene sodium treatment or plasma treatment by using the adhesive coating equipment. Depending on the design requirements, the easy-to-attach surface treatment may not be performed, so that the adhesive water layer 702 can be as Figure 2 As shown, a first adhesive layer 702 is formed on one side of an ultra-thin fluorine-containing polymer or thermoplastic polyester elastomer or ultra-high molecular weight polyethylene material substrate 701 , and during this process, the substrate layer 704 provides support for the substrate 701 .

[0048] After the first adhesive layer 702 is provided on one side of the substrate 701, the release film 703 is attached to the side of the adhesive layer 702 away from the substrate 701, and then the backing layer 704 is torn off, and the release film 703 is used as the backing layer, and then a precision small laminating device or a precision coating device such as Figure 3 As shown, a thin double-sided adhesive or ultra-thin adhesive is applied to the side of the substrate 701 away from the release film 703 to form a second adhesive layer 702, and then a second release film 703 is attached to the newly attached adhesive layer 702 to form a Figure 1 The finished double-sided tape shown is Figure 3 In this process, the release film 703 and the backing layer 704 have the same function of providing support for the substrate 701 so that the thickness of the substrate 701 and the adhesive layer 702 can be reduced.

[0049] The release film 703 is bonded to the double-sided adhesive layer 702 before use, so that the adhesive layer 702 of the double-sided adhesive tape will not be contaminated during transportation.

[0050] The release film 703 can be separated from the substrate 701 before use, so the thickness of the backing layer 704 will not affect the total thickness of the substrate 701 and the adhesive layer 702 of the product, so that the total thickness of the substrate 701 and the adhesive layer 702 of the product is greatly reduced, and the total thickness of the substrate 701 and the double-sided adhesive layer 702 can reach between 0.007 and 0.04 mm.

[0051] In the second embodiment, the release film 703 and the substrate layer 704 are removed from the first embodiment, and only the double-sided tape of the adhesive layer 702 and the substrate 701 is retained for use on a flexible folding mobile phone.

[0052] like Figure 4 and 5 The flexible folding mobile phone shown includes: a mobile phone back cover 1, a decorative strip 2, a hinge 3, a mobile phone middle frame 4, a first double-sided tape 5, a graphene heat sink 6, a second double-sided tape 7, an FPC 8, a screen support sheet 9 and a flexible OLED screen 10.

[0053] The first double-sided tape 5 and / or the second double-sided tape 7 are the base material 701 and the adhesive layer 702 of the anti-creep double-sided tape described in the first embodiment.

[0054] The decorative strip 2 is connected to the hinge 3, the mobile phone middle frame 4 is connected to the mobile phone back cover 1, the hinge 3 is connected to the mobile phone middle frame 4, the mobile phone middle frame 4, the first double-sided tape 5, the graphene heat sink 6, the second double-sided tape 7, the FPC 8, the screen support sheet 9 and the flexible OLED screen 10 are connected in sequence.

[0055] In a further embodiment, Figure 6 and 7 The flexible foldable mobile phone shown further includes: a rotating shaft pressure strip 11 , both ends of which are fixedly connected to the rotating shaft 3 .

[0056] The graphene heat sink 6 and FPC8 are combined into a whole through the second double-sided tape 7, which eliminates the abnormal noise caused by the collision between the graphene heat sink 6 and FPC8 when the mobile phone is folded and opened, and increases the strength of the graphene heat sink 6 or FPC8, solving the risk of deformation caused by poor bending creep resistance of the existing traditional polyester (PET) and polyimide (PI) double-sided tapes.

[0057] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be interpreted as limiting the present invention itself. Various changes can be made to it in form and detail without departing from the spirit and scope of the present invention defined in the appended claims.

Claims

1. An anti-creep double-sided tape, comprising: A substrate, and adhesive layers disposed on both sides of the substrate; The invention is characterized in that the substrate is a fluorine-containing polymer material or a thermoplastic polyester elastomer or an ultra-high molecular weight polyethylene, and the substrate is a film-like structure with a thickness between 0.005 and 0.02 mm; The adhesive layer is made of double-sided adhesive or self-adhesive water, the adhesive layer on each side is a film-like structure with a thickness between 0.001 and 0.01 mm, and the total thickness of the adhesive layers on both sides is between 0.002 and 0.02 mm; The adhesive layer is bonded and matched with the base material.

2. The anti-creep double-sided tape according to claim 1, characterized in that: Also includes: The substrate layer is disposed on one side of the base material.

3. The anti-creep double-sided tape according to claim 1, characterized in that: Also includes: Two layers of release films, each layer of the release film is respectively bonded to a side of each adhesive layer away from the substrate.

4. The anti-creep double-sided tape according to claim 1, characterized in that: The fluorine-containing polymer material is PTFE, PFA, ETFE, FEP, PCTFF, ECTFF, PVDF or PVF.

5. The anti-creep double-sided tape according to claim 1, characterized in that: The thermoplastic polyester elastomer material is TPEE material.

6. The anti-creep double-sided tape according to claim 1, characterized in that: The ultra high molecular weight polyethylene material is UHMWPE material.

7. The anti-creep double-sided tape according to claim 1, characterized in that: The double-sided adhesive or the self-adhesive adhesive is made of acrylic adhesive or silicone adhesive.

8. A flexible foldable mobile phone, characterized in that: include: Mobile phone back cover, decorative strip, hinge, mobile phone middle frame, first double-sided tape, graphene heat sink, second double-sided tape, FPC, screen support sheet and flexible OLED screen; The first double-sided tape and / or the second double-sided tape are the substrate and adhesive layer of the anti-creep double-sided tape according to any one of claims 1 to 7; The decorative strip is connected to the rotating shaft, the mobile phone middle frame is connected to the mobile phone back cover, the rotating shaft is connected to the mobile phone middle frame, and the mobile phone middle frame, the first double-sided tape, the graphene heat sink, the second double-sided tape, the FPC, the screen support sheet and the flexible OLED screen are connected in sequence.

9. The flexible foldable mobile phone according to claim 8, characterized in that: Also includes: The two ends of the rotating shaft pressure strip are fixedly connected to the rotating shaft.

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