Glue suction cup

Abstract

A glue dripping suction cup comprises: a soft glue disc body, a glue dripping polymer disc formed on the upper surface of the soft glue disc body, and a hard glue fixing nail injection-molded on the lower surface of the soft glue disc body, wherein the soft glue disc body is injection-molded by TPU or PVC material, and a coupling agent is pre-coated on its surface to enhance the bonding force with the glue dripping layer; the glue dripping polymer disc is made of a composite material of modified acrylic resin and a tackifier, wherein the modified acrylic resin accounts for 60-75wt% of the composite material, and the tackifier accounts for 25-40wt%, and the composite material forms a high-toughness glue layer with a tensile strength of ≥8MPa and a peel strength of ≥15N / cm after curing; the hard glue fixing nail is injection-molded by polypropylene (PP) or acrylonitrile-butadiene-styrene copolymer (ABS), and its surface roughness Ra is 1.6-3.2μm to enhance the mechanical bonding with the soft glue disc body.

Description

Technical Field

[0001] The invention relates to a suction cup device for fixing objects, in particular to a glue dripping suction cup. Background Art

[0002] As we all know, in all aspects of daily life, people use suction cup products that use the vacuum adsorption principle as auxiliary fixing products. For example, the suction cup hook that works on the vacuum adsorption principle is used to adsorb and fix itself on a smooth, clean and flat surface such as a wall, so as to achieve the function of hooking items. Another example is the in-vehicle electronic product bracket that uses the vacuum adsorption principle. The bracket is firmly adsorbed on, for example, the front windshield or rear windshield of the car through the vacuum suction cup, thereby achieving a fast and convenient bracket installation without damaging the glass, and then indirectly various consumer electronic products such as mobile phones, tablets or driving recorders can be fixed on the bracket, making it convenient for users to use such electronic products.

[0003] Among the many products based on the vacuum adsorption principle mentioned above, the glue suction cup is often used in daily life, which is widely used in the automotive and furniture industries. The main structure of the glue suction cup is to pour the self-adhesive material on the soft glue disc body, which has strong bonding performance after drying and curing. After matching with the shell structure, it can have good adhesion performance on flat contact surfaces such as glass, tiles, leather grain, wood grain, etc., thus forming a strong bonding and fixing ability.

[0004] The existing glue suckers mostly use PU (polyurethane) material as the glue raw material. Although it has a certain degree of adhesion, it has the following defects:

[0005] 1. Insufficient bonding performance: It is easy to fall off on smooth surfaces such as glass and tiles due to external forces or environmental changes (such as temperature fluctuations);

[0006] 2. Process limitations: The traditional glue dripping process uses cold material direct pouring without preheating, resulting in poor material fluidity and low bonding strength with the soft rubber disc;

[0007] 3. Limited compatibility: Existing epoxy materials are only suitable for specific types of soft rubber discs (such as TPU or PVC), and the scope of application is narrow.

[0008] In summary, the adhesive force of the prior art glue suction cup itself is insufficient, and it is easy for the performance of the self-adhesive material to deteriorate over time and due to long-term chemical corrosion during long-term use, eventually leading to poor adhesive force, causing the glue suction cup and the items placed on it to fall off.

[0009] Therefore, it is necessary to provide an improved glue-dropping suction cup to overcome the above-mentioned shortcomings of the prior art and greatly improve the bonding ability and service life of the self-adhesive sticker on the glue-dropping suction cup. Summary of the invention

[0010] The purpose of the present invention is to solve the above problems and provide a glue dripping suction cup.

[0011] To meet the purpose of the present invention, the present invention adopts the following technical solutions:

[0012] A glue sucker, comprising: a soft glue disc body, a glue polymer disc formed on the upper surface of the soft glue disc body, and a hard glue fixing nail injection-molded on the lower surface of the soft glue disc body, wherein the soft glue disc body is injection-molded by TPU or PVC material, and a coupling agent is pre-coated on its surface to enhance the bonding force with the glue layer;

[0013] The dripping polymer disc is made of a composite material of modified acrylic resin and a tackifier, wherein the modified acrylic resin accounts for 60-75wt% of the composite material, and the tackifier accounts for 25-40wt%. After the composite material is cured, a high-toughness adhesive layer with a tensile strength of ≥8MPa and a peel strength of ≥15N / cm is formed; the hard glue fixing pin is injection molded by polypropylene (PP) or acrylonitrile-butadiene-styrene copolymer (ABS), and its surface roughness Ra is 1.6-3.2μm, so as to enhance the mechanical bonding with the soft glue disc body.

[0014] Preferably, the tackifier is a mixture of hydrogenated rosin glycerol ester and terpene resin, and the mixing mass ratio of the two is 1:1-1:3.

[0015] Preferably, the coupling agent is silane coupling agent KH-550 or KH-560, and the coating thickness is 10-50 μm.

[0016] Preferably, the dripping polymer disk is prepared by the following steps:

[0017] First, the modified acrylic resin and the tackifier are mixed, preheated to a specific temperature and kept warm for a certain period of time to form a homogeneous glue solution; and

[0018] Secondly, the homogeneous glue liquid is poured onto the top of the soft glue disc body, and dried and cured at 80° C. for 30 minutes to form a dripping glue polymer disc with uniform thickness.

[0019] Preferably, a boss is formed on the lower surface of the soft plastic disc body, and the hard plastic fixing pin is overmolded inside the boss.

[0020] Further preferably, the hard plastic fixing nail includes a flange and a column formed at the bottom of the flange; the flange is overmolded in the boss.

[0021] Further preferably, the flange is provided with a plurality of openings axially. Preferably, the plurality of openings are evenly distributed along the circumference of the flange; the apertures between the plurality of openings are 2-5 mm, and the total area of ​​the openings accounts for 20-40% of the surface area of ​​the flange.

[0022] Preferably, the bottom of the Farah plate forms a reinforcing platform, and the bottom of the reinforcing platform forms the column.

[0023] Preferably, an axial hole is formed at the end of the cylinder; and an arc-shaped surface is formed at the end of the cylinder.

[0024] Preferably, the specific temperature is 60-80° C., and the certain time is 25-35 minutes.

[0025] Compared with the prior art, the advantages of the present invention are as follows:

[0026] First, in the glue sucker provided by the present invention, the glue polymer disc formed on the upper surface of the soft glue disc body adopts the industry's first glue raw material, whose main component is a composite material of modified acrylic resin and tackifier. After curing, this material forms a high-toughness glue layer, which has a stronger molecular bonding force with the contact surface, and the bonding performance is improved by more than 30% compared with the PU material of the prior art.

[0027] Secondly, in the preparation process of the glue suction cup of the present invention, the raw materials are preheated before the glue is poured (temperature range 60°C-80°C, time 5-10 minutes) to improve the fluidity of the material, enhance its wettability with the soft glue disc body, reduce interface bubbles, and thus improve the overall structural strength.

[0028] Finally, the glue suction cup of the present invention has certain compatibility optimizations. For example, the new glue material is compatible with a variety of soft glue discs (including but not limited to TPU, PVC, silicone, etc.), thereby expanding the application scenarios of the product.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description, which will become obvious from the following description, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0031] Figure 1 The figure is a three-dimensional diagram of a glue-dropping suction cup according to an embodiment of the present invention.

[0032] Figure 2 for Figure 1 Exploded perspective view of the glue suction cup shown. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and cannot be interpreted as limiting the present invention.

[0034] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0035] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as herein.

[0036] According to one embodiment of the present invention, Figure 1-2 A glue suction cup 100 includes: a soft glue disc body 20, a glue polymer disc 10 formed on the upper surface 22 of the soft glue disc body 20, and a hard glue fixing pin 30 injection-molded on the lower surface 24 of the soft glue disc body 20.

[0037] In the above embodiment, the soft plastic disc body 20 is preferably made of TPU or PVC material by injection molding, and a coupling agent is pre-coated on its surface to enhance the bonding force with the dripping glue layer.

[0038] In addition, in one embodiment, the dripping polymer disc 10 is made of a composite material of modified acrylic resin and a tackifier, wherein the modified acrylic resin accounts for 60-75wt% of the composite material, and the tackifier accounts for 25-40wt%, and the composite material forms a high-toughness adhesive layer with a tensile strength ≥8MPa and a peel strength ≥15N / cm after curing; the hard glue fixing pin is injection molded by polypropylene (PP) or acrylonitrile-butadiene-styrene copolymer (ABS), and its surface roughness Ra is 1.6-3.2μm, so as to enhance the mechanical bonding with the soft glue disc body.

[0039] Preferably, the tackifier is a mixture of hydrogenated rosin glycerol ester and terpene resin, and the mixing mass ratio of the two is 1:1-1:3. The tackifier formed by the mixture in this ratio range has good bonding strength, so that the bonding becomes firm.

[0040] In addition, the coupling agent is silane coupling agent KH-550 or KH-560, and the coating thickness is 10-50 μm.

[0041] Meanwhile, in the above embodiment, the dripping polymerizing disc 10 is preferably prepared by the following steps:

[0042] First, the modified acrylic resin and the tackifier are mixed, preheated to 70° C. and kept warm for 8 minutes to form a homogeneous glue solution; and

[0043] Secondly, the homogeneous glue liquid is poured onto the top of the soft glue disc body 20, and dried and cured at 80°C for 30 minutes to form a drip glue polymer disc 10 with uniform thickness.

[0044] Although in the above embodiment, the preheating temperature is 70° C., in other embodiments, it can be within a certain temperature range, such as 60-80° C., and the insulation time can also be within a certain range, such as 25-35 minutes.

[0045] In addition, in this embodiment, the hard plastic fixing nail 30 is used as a shell structural member to be fixed to an external structure such as a mobile electronic device that needs to be supported or held, such as a mobile phone, a tablet or a driving recorder.

[0046] Preferably, a boss 26 is formed on the lower surface 24 of the soft plastic disc body 20, and the hard plastic fixing nail 30 is overmolded in the boss 26. Through this overmolding process, the top structure of the hard plastic fixing nail 30 is covered by the boss 26, thereby enhancing the connection reliability between the soft plastic disc body 20 and the hard plastic fixing nail 30.

[0047] Further preferably, the hard plastic fixing nail 30 includes a flange 32 and a column 36 formed at the bottom of the flange 32; the flange 32 is overmolded in the boss 26. After the Farah disc 32 is overmolded in the boss 26, the combination between the hard plastic fixing nail 30 and the soft plastic disc body 20 becomes more firm, so that the structure of the entire glue sucker 100 is more stable, and the fixing of the electronic device is also more stable.

[0048] Optionally, the flange 32 is provided with a plurality of openings 322 evenly distributed along its circumferential direction. By providing the openings 322, a larger contact area can be formed between the flange 32 and the boss 26, thereby further enhancing the connection reliability between the two. The apertures of the plurality of openings 322 are 2-5 mm, and the total area of ​​the openings accounts for 20-40% of the surface area of ​​the flange.

[0049] Preferably, in order to increase the structural strength of the entire hard plastic fixing nail 30 , a reinforcing platform 34 is formed at the bottom of the Farah disc 32 , and the bottom of the reinforcing platform 34 forms the column 36 .

[0050] Preferably, in order to achieve the flexibility of use of the entire glue suction cup 100, for example, to allow the glue suction cup 100 to rotate at an appropriate angle in space to adjust the posture of the held electronic device, an axial hole 362 can be formed at the end of the column 36 to rotate with the rest of the external structure.

[0051] In addition, in order to ensure the smoothness of the above-mentioned rotation and reduce the rotation resistance, the end of the column 36 forms an arc surface 364.

[0052] When using the glue sucker of the present invention, the user first selects a suitable installation surface, such as the front and rear windshields of the car, or a flat and smooth wall indoors, and then tightly fits the glue polymer disc 10 on the glass or wall, and fixes the entire glue sucker on it with the strong bonding effect of the glue polymer disc 10 itself, and further enhances the bonding force between the glue polymer disc 10 and the wall or glass with the vacuum adsorption principle, so that the glue sucker is firmly and stably adsorbed for a long time. Then the user can clamp an electronic device such as a mobile phone, a tablet or a driving recorder on the glue sucker.

[0053] The advantages of the glue dripping sucker of the present invention are as follows:

[0054] Significantly improved bonding performance: By optimizing the material formula, the suction cup has stronger adhesion on smooth surfaces such as glass and tiles, and the risk of falling off is reduced by more than 50%;

[0055] Process innovation: The preheating process solves the problem of insufficient bonding caused by cold material infusion and improves product yield;

[0056] Wide applicability: compatible with a variety of soft rubber substrates to meet the needs of different industries.

[0057] In the composite material of the dripping polymer disc, the modified acrylic resin is preferably methyl methacrylate-butyl acrylate copolymer (MMA-BA), and its glass transition temperature (Tg) is -20°C to 10°C, which gives the adhesive layer excellent low-temperature toughness. The tackifier adopts a composite system of hydrogenated rosin glycerol ester and terpene resin. The synergistic effect of the two can improve the adhesion of the adhesive layer to polar surfaces (such as glass, ceramics) and non-polar surfaces (such as PP, ABS). According to the test, the 180° peel strength of the adhesive layer at 25°C reaches 18.5N / cm, which is 50% higher than that of traditional PU materials (12.3N / cm).

[0058] When the hard plastic fixing pin is made of ABS material, its bending modulus is ≥2200MPa, ensuring the rigidity of the supporting structure; the roughness Ra of the surface after sandblasting is 2.4μm, and the overmolding bonding strength with the soft plastic disc body is increased to 4.5MPa (compared with 3.1MPa of the untreated surface).

[0059] Example Data

[0060] Preheating process optimization: When the glue solution was preheated at 70°C for 8 minutes, the interface bubble rate dropped to 0.5% (compared to 3.2% in the non-preheating group), and the bonding strength between the glue layer and the soft rubber disc was increased to 6.8MPa.

[0061] Environmental test: After the glue suction cup is cycled 100 times from -30℃ to 80℃, the bonding strength retention rate is >90% and there is no debonding phenomenon.

[0062] Application Scenario

[0063] This suction cup can be used in car navigation systems (weight ≤ 500g), bathroom shelves (load bearing ≤ 5kg), etc. In the test of the inclined surface of the car windshield, the suction cup continuously adsorbed for 48 hours at a speed of 80km / h without displacement, meeting the requirements of dynamic working conditions.

[0064] Those skilled in the art will appreciate that the various operations, methods, steps, measures, and schemes in the processes discussed in this application may be alternated, altered, combined, or deleted. Further, other steps, measures, and schemes in the various operations, methods, and processes discussed in this application may also be alternated, altered, rearranged, decomposed, combined, or deleted. Further, the steps, measures, and schemes in the prior art that are similar to those disclosed in this application may also be alternated, altered, rearranged, decomposed, combined, or deleted.

[0065] The above description is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A glue sucker, comprising: A soft plastic disc, a dripping plastic polymer disc formed on the upper surface of the soft plastic disc, and a hard plastic fixing pin injection-molded on the lower surface of the soft plastic disc, characterized in that: The soft rubber disc body is injection molded with TPU or PVC material, and a coupling agent is pre-coated on its surface to enhance the bonding force with the drip glue layer; The dripping polymer disc is made of a composite material of modified acrylic resin and tackifier, wherein the modified acrylic resin accounts for 60-75wt% of the composite material, and the tackifier accounts for 25-40wt%. After the composite material is cured, a high-toughness adhesive layer with a tensile strength of ≥8MPa and a peel strength of ≥15N / cm is formed; The hard plastic fixing nail is injection molded from polypropylene (PP) or acrylonitrile-butadiene-styrene copolymer (ABS), and its surface roughness Ra is 1.6-3.2 μm to enhance the mechanical bonding with the soft plastic disc body.

2. The glue sucker according to claim 1, characterized in that: The tackifier is a mixture of hydrogenated rosin glycerol ester and terpene resin, and the mixing mass ratio of the two is 1:1-1:

3.

3. The glue sucker according to claim 1, characterized in that: The coupling agent is silane coupling agent KH-550 or KH-560, and the coating thickness is 10-50 μm.

4. The glue sucker according to claim 1, characterized in that: The dripping polymer disk is prepared by the following steps: First, the modified acrylic resin and the tackifier are mixed, preheated to a specific temperature and kept warm for a certain period of time to form a homogeneous glue solution; and Secondly, the homogeneous glue liquid is poured onto the top of the soft glue disc body, and dried and cured at 80° C. for 30 minutes to form a dripping glue polymer disc with uniform thickness.

5. The glue sucker according to claim 1, characterized in that: A boss is formed on the lower surface of the soft rubber disc body, and the hard rubber fixing nail is overmolded in the boss.

6. The glue sucker according to claim 5, characterized in that: The hard plastic fixing nail includes a flange and a column formed at the bottom of the flange; the flange is overmolded in the boss.

7. The glue sucker according to claim 6, characterized in that: The flange is axially provided with a plurality of openings.

8. The glue sucker according to claim 7, characterized in that: The multiple openings are evenly distributed along the circumference of the flange; the apertures of the multiple openings are 2-5 mm, and the total area of ​​the openings accounts for 20-40% of the surface area of ​​the flange.

9. The glue sucker according to claim 8, characterized in that: The bottom of the Farah disc forms a reinforcing platform, the bottom of the reinforcing platform forms the column; the end of the column forms an axial hole; the end of the column forms an arc surface.

10. The glue sucker according to claim 4, characterized in that: The specific temperature is 60-80° C., and the certain time is 25-35 minutes.

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