A glue-free bonding heterogeneous material and a preparation method thereof

Abstract

The application discloses a glue-free adhering heterogeneous material and a preparation method thereof. The glue-free adhering heterogeneous material comprises a first heterogeneous material, a second heterogeneous material and a binding material, and various materials are connected through glue-free adhering. The preparation method comprises the following steps: conveying and extruding the first heterogeneous material, the second heterogeneous material and the first surface and the second surface of the binding material through a pressing equipment, so that the first heterogeneous material, the binding material and the second heterogeneous material are combined, and the first heterogeneous material, the binding material and the second heterogeneous material are connected and adhered through the foaming force generated by foaming physical and / or chemical reaction. The glue-free adhering technology is adopted, so that the environmental protection problem is solved, and the application approach of the product is improved.

Description

Technical Field

[0001] This application relates to the field of materials technology, and in particular to an adhesive-free bonding heterogeneous material and its preparation method. Background Technology

[0002] Due to the need for product diversity, single-material rubber foam products are gradually failing to meet market demands. Utilizing foam materials with different composite materials can enhance the aesthetics of products and make them more acceptable to consumers, thus becoming a direction that industry players are currently striving to develop.

[0003] However, in the existing technology, to attach materials with different physical properties to the surface of foamed materials such as rubber, an adhesive or bonding agent must be applied to the surface of the rubber sheet before it is sent into the vulcanizing foaming box of the vulcanizing molding machine. Then, materials with different physical properties are placed on the rubber sheet and sent into the vulcanizing foaming box together to foam it into foamed products with different physical properties.

[0004] The adhesives used in this type of bonded material make the bonding process more complex, and choosing the right adhesive is crucial to ensuring good bond strength and durability. An improper choice may lead to bonding failure or poor performance.

[0005] This method of bonding using adhesives or bonding agents pollutes both the air and water. Besides causing environmental problems, the manufacturing process is overly complex, requires a large amount of manual labor, is time-consuming, and is prone to material waste, making it less than ideal. Summary of the Invention

[0006] To address the aforementioned technical problems, this application discloses a glue-free method for bonding heterogeneous materials and its preparation method. This enhances the aesthetics of foamed products and expands their applications.

[0007] To achieve the above-mentioned objective, this application provides a method for preparing adhesive-free bonded heterogeneous materials, the method comprising the following steps:

[0008] A first foreign material, a second foreign material, and a bonding material are provided. The bonding material can be bonded to the first foreign material and the second foreign material by compression force and foaming force. The bonding material includes a first surface and a second surface.

[0009] When the first foreign material, the second foreign material, and the bonding material are conveyed and extruded by the pressing equipment, the first foreign material comes into contact with the first surface, and the second foreign material comes into contact with the second surface;

[0010] When the first foreign material comes into contact with the first surface, the first foreign material and the first surface are bonded together by the foaming force generated by the foaming physical and / or chemical reaction.

[0011] When the second foreign material comes into contact with the second surface, the second foreign material and the second surface are bonded together by the foaming force generated by the foaming physical and / or chemical reaction.

[0012] When the first foreign material and the second foreign material come into contact, the first foreign material and the second foreign material are bonded together by the foaming force generated by the physical and / or chemical reaction of foaming.

[0013] Preferably, the pressing equipment includes one of a roller-type foaming roller press, a track-type foaming roller press, and a platen-type foaming hot press.

[0014] Preferably, the pressing device includes rollers, tracks, and pressure plates, and the surfaces of any one of the rollers, tracks, and pressure plates have symmetrically fitted concave and convex surfaces.

[0015] Preferably, the first foreign material and the second foreign material are bonded together, and the first foreign material and the second foreign material have a contact area when bonded together. The contact area ratio is controlled by one or more of the following forces: pressing force, foaming force, vulcanization bridging force and material rebound force.

[0016] Preferably, the ratio of the contact area between the first foreign material and the first foreign material is 0% to 100%.

[0017] Preferably, the ratio of the contact area between the first foreign material and the first foreign material is 0%, 20% to 50%, or 60% to 100%.

[0018] Preferably, the first and second materials comprise foamed materials with different properties, the foamed materials comprising one or more of natural rubber, polyurethane, polystyrene, and polyolefin, and the bonding material comprises a braided material having braided pores.

[0019] Preferably, the first and second foreign materials comprise different braided materials having braided pores, and the bonding material comprises a foamed material comprising one or more of natural rubber, polyurethane, polystyrene, and polyolefin.

[0020] Preferably, the weaving material includes one or more of cotton, polyester fiber, and nylon fiber.

[0021] Preferably, when the first foreign material, the second foreign material, and the bonding material are bonded together, the first foreign material and the second foreign material form several pseudo-bonded parts between the weave gaps. An air nozzle is provided in the pressing device to introduce gas into the pseudo-bonded parts and support the pseudo-bonded parts to form an air cushion.

[0022] On the other hand, this application also provides a non-adhesive bonding heterogeneous material, which is prepared by the above-described preparation method.

[0023] Based on the above technical solution, this application has the following beneficial effects:

[0024] This application connects materials with different physical properties using adhesive-free bonding (i.e., bonding without adhesive), which can greatly simplify the manufacturing process, eliminate the use of adhesives to avoid the generation of toxic substances, avoid the potential risk of adhesive pollution, solve environmental problems, reduce labor costs and material waste, and help improve economic efficiency. Attached Figure Description

[0025] To more clearly illustrate the adhesive-free bonding heterogeneous materials and their preparation method described in this application, the accompanying drawings required for the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional view of the laminated product of the present invention.

[0027] Figure 2 This is an exploded view of the bonding of dissimilar foamed materials and a woven material according to the present invention.

[0028] Figure 3 This is a schematic diagram of the bonding operation using a roller-type foaming roll press according to the present invention.

[0029] Figure 4 This is a schematic diagram of the bonding operation using a pressure plate type foaming hot press according to the present invention.

[0030] Figure 5 This is a schematic diagram of the bonding operation using a tracked foaming roller press according to the present invention.

[0031] Figure 6 This is a schematic diagram of the roller-type foaming roll press of the present invention, which performs bonding operations on concave and convex surfaces.

[0032] Figure 7 This is a schematic diagram of the platen-type foaming hot press of the present invention, which performs bonding operations using concave and convex surfaces.

[0033] Figure 8 This is a schematic diagram of the tracked foaming roller press of the present invention, which performs bonding operations on uneven surfaces.

[0034] Figure 9 This is a schematic diagram of the roller-type foaming roll press of the present invention performing pressure bonding operations.

[0035] Figure 10 This is a schematic diagram of the pressure bonding operation performed by the pressure plate type foaming hot press of the present invention.

[0036] Figure 11 This is a schematic diagram of the pressure bonding operation performed by the tracked foaming roller press of the present invention.

[0037] Figure 12 This is an exploded view of the foam material bonding when the bonding material of this invention is a woven material.

[0038] Figure 13 This invention relates to a cross-sectional view showing that different foamed materials are bonded to a woven material and form a plurality of pseudo-adhesive areas.

[0039] Figure 14 This is a schematic diagram of the present invention, which uses an air nozzle to introduce air and support the pseudo-adhesive parts to form a plurality of air cushions.

[0040] Figure 15 This is an exploded view of the bonding of different woven materials and foamed materials according to the present invention.

[0041] Figure 16 This is a schematic diagram of the present invention, which uses a roller-type foaming press to bond different woven materials and foamed materials.

[0042] Figure 17 This is a schematic diagram of the roller-type foaming rolling press of the present invention, which uses concave and convex surfaces to bond different woven materials and foaming materials.

[0043] in:

[0044] 10: First dissimilar material; 20: Second dissimilar material; 30: Bonding material; 31: First surface; 32: Second surface; 33: Weave gap; 40: Pressing equipment; 41: Uneven surface; 50: Pseudo-adhesive part; 51: Air nozzle; 52: Air cushion body; 60: Bonding part. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0046] As used herein, "an embodiment" or "an embodiment" refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this application. The invention will be more readily understood by referring to the following detailed description of preferred embodiments and included examples. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In case of conflict, the definitions in this specification shall prevail.

[0047] For the terms defined below, unless a different definition is given elsewhere in the claims or this specification, these definitions shall apply. All numerical values, whether explicitly indicated or not, are defined herein as being modified by the term "about." The term "about" generally refers to a range of numerical values ​​that a person skilled in the art would consider equivalent to the stated values ​​to produce substantially the same properties, functions, results, etc. A range of numerical values ​​indicated by a low value and a high value is defined as including all numerical values ​​included within that range and all subranges included within that range.

[0048] Although the numerical ranges and parameters illustrating the broad scope of the invention are approximate, the values ​​listed in the specific examples are reported as precisely as possible. However, any numerical value inherently contains some error that is necessarily caused by the standard deviation found in their respective test measurements.

[0049] When a numerical range is disclosed herein, the range is considered continuous and includes the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Furthermore, when the range refers to an integer, it includes every integer between the minimum and maximum values ​​of the range. Additionally, when multiple ranges are provided to describe a feature or characteristic, the ranges may be combined. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges to which they are included. For example, a specified range from “1 to 10” should be considered to include any and all subranges between the minimum value 1 and the maximum value 10. Exemplary subranges of the range 1 to 10 include, but are not limited to, 1 to 6.1, 3.5 to 7.8, 5.5 to 10, etc.

[0050] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application 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 so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0051] Before providing a further detailed description of the embodiments of this application, the nouns and terms involved in the embodiments of this application will be explained, and the nouns and terms involved in the embodiments of this application shall be interpreted as follows.

[0052] Foaming force refers to the physical and / or chemical reaction forces generated during the foaming reaction of foamed materials.

[0053] In the rubber industry, "vulcanization" and "crosslinking" are synonyms. The purpose of vulcanization crosslinking is to give the rubber compound excellent properties such as high strength, high elasticity, high wear resistance, and corrosion resistance, eliminate permanent deformation, and enable the rubber to quickly and completely return to its original shape after deformation.

[0054] Material rebound force refers to the rebound force generated by the foam material when the pressing equipment is conveying and extruding the foam material.

[0055] The following describes a method for preparing adhesive-free bonded heterogeneous materials according to embodiments of this application. The preparation method may include the following steps:

[0056] S1: Provide a first foreign material, a second foreign material, and a bonding material, wherein the bonding material can be bonded to the first foreign material and the second foreign material by compression force and foaming force, and the bonding material includes a first surface and a second surface;

[0057] S2: The first foreign material, the second foreign material, and the bonding material are conveyed and extruded by the pressing equipment, the first foreign material abuts against the first surface, and the second foreign material abuts against the second surface;

[0058] S3: When the first foreign material comes into contact with the first surface, the first foreign material and the first surface are bonded together by the foaming force generated by the foaming physical and / or chemical reaction.

[0059] S4: When the second foreign material comes into contact with the second surface, the second foreign material and the second surface are bonded together by the foaming force generated by the foaming physical and / or chemical reaction;

[0060] S5: When the first foreign material, the second foreign material and the bonding material are brought into contact, the first foreign material and the second foreign material are bonded together by the foaming force generated by the physical and / or chemical reaction of foaming.

[0061] In some embodiments, such as Figure 1-3As shown, a first foreign material 10 and a second foreign material 20 are prepared, as well as a bonding material 30 that can be bonded to the first foreign material 10 and the second foreign material 20 respectively by compression force and foaming force. The first foreign material 10 and the second foreign material 20 are foamed materials with different physical properties. The foamed material is selected from any one of the elastomers such as natural rubber (NR), polyurethane (PU), polystyrene (PS), and polyolefin (such as PE, PP, etc.). The bonding material 30 is a woven material with woven pores 33. Specifically, it can be selected from any woven fabric or woven sheet such as cotton, polyester fiber, and nylon fiber.

[0062] The first and second dissimilar materials 10 and 20 are bonded to the bonding material 30 using a pressing device 40. The bonding material 30 has a first surface 31 and a second surface 32. Through the conveying and extrusion of the pressing device 40, the first dissimilar material 10 and the second dissimilar material 20 are respectively brought into contact with the first surface 31 and the second surface 32 of the bonding material 30. Utilizing the foaming force generated by the physical and chemical reactions of the first dissimilar materials 10 and 20, they are bonded to the first surface 31 and the second surface 32 of the woven sheet material bonding material 30 without adhesive, thereby achieving the purpose of bonding the first and second dissimilar materials of different materials without adhesive.

[0063] In some embodiments of this application, the pressing equipment 40 is one of the following: a roller-type foaming roller press, a track-type foaming roller press, and a plate-type foaming hot press.

[0064] like Figure 3-5 The pressing force of the pressing device 40 is adjusted to control the contact area ratio of the first foreign material 10 and the second foreign material 20 when they are bonded together. As shown in the enlarged view in Figure 3, the pressing force of the pressing device 40 only bonds the first foreign material 10 and the second foreign material 20 to the first surface 31 and the second surface 32 of the bonding material 30. The first foreign material 10 and the second foreign material 20 will not pass through the woven holes of the bonding material 30 due to pressing. The first foreign material 10 and the second foreign material 20 do not contact each other and form a 0% contact area.

[0065] In some embodiments, in addition to adjusting the pressing force, the above-mentioned adhesive-free bonding operation can also control the contact area ratio when the first and second dissimilar materials are bonded by foaming reaction, vulcanization bridging force, and material rebound force.

[0066] like Figure 6-8As shown, in some embodiments, the rollers, tracks, and pressure plate surfaces of the pressing device 40 have symmetrically fitted concave and convex surfaces 41, and the contact area ratio of the first foreign material 10 and the second foreign material 20 when they are bonded is controlled by the concave and convex surfaces 41. As shown in the partial enlarged view in Figure 6, the first foreign material 10 and the second foreign material 20 are pressed towards the bonding material 30 by the concave and convex surfaces 41, so that the first foreign material 10 and the second foreign material 20 can partially contact each other through the weave gaps of the bonding material 30, so that the first foreign material 10 and the second foreign material 20 can not only bond to the first surface 31 and the second surface 32 of the bonding material 30, but also partially contact each other to form a contact area of ​​at least 20% to 50%, while having the effect of the first foreign material 10 and the second foreign material 20 covering the woven fibers of the bonding material 30.

[0067] In some embodiments, such as Figure 9-11 As shown, during the planar pressing operation, the pressing equipment 40 increases the pressing force, causing the first dissimilar material 10 and the second dissimilar material 20 to be squeezed through the woven pores of the bonding material 30. As shown in the enlarged view in Figure 9, the first dissimilar material 10 and the second dissimilar material 20 can contact each other through the woven pores of the bonding material 30, allowing them to adhere to the first surface 31 and the second surface 32 of the bonding material 30. Furthermore, they can contact each other to form a contact area of ​​60% to 100%, simultaneously achieving the effect of the first dissimilar material 10 and the second dissimilar material 20 encapsulating the woven fibers of the bonding material 30. This helps to improve the bonding strength of the first dissimilar material 10 and the second dissimilar material 20 without adhesive bonding, thereby enhancing the overall stability of the material.

[0068] In some embodiments, such as Figure 12-14 As shown, when the first foreign material 10 and the second foreign material 20 are attached to the first surface 31 and the second surface 32 of the bonding material 30, they can contact each other through the woven pores 33 of the bonding material to form a plurality of pseudo-adhesive parts 50. Then, the first foreign material 10 or the second foreign material 20 is provided with an air nozzle 51 at the pressing equipment to introduce gas into the pseudo-adhesive parts 50. The gas is conducted through the fiber pores of the woven mesh to each pseudo-adhesive part 50, further supporting the pseudo-adhesive parts 50 to form a plurality of air cushions 52.

[0069] In some embodiments, such as Figure 15 , 16As shown, the first dissimilar material 10 and the second dissimilar material 20 are woven fabrics or sheets, selected from any woven material such as cotton, polyester fiber, or nylon fiber. The bonding material 30 is any elastomer such as natural rubber (NR), polyurethane (PU), polystyrene (PS), or polyolefin (such as PE or PP). When the bonding operation is carried out by the pressing equipment 40, the first dissimilar material 10 and the second dissimilar material 20 are conveyed and squeezed and then come into contact with the first surface 31 and the second surface 32 of the bonding material 30, respectively. Then, the foaming force generated by the foaming physical and chemical reaction of the bonding material 30 is used to bond the first dissimilar material 10 and the second dissimilar material 20 of the woven body material without glue. In this way, the first dissimilar material 10 and the second dissimilar material 20 with different materials are bonded together in a glueless manner.

[0070] Specifically, in addition to adjusting the pressing force, the above-mentioned adhesive-free bonding operation can also control the contact area ratio of the first and second dissimilar materials during bonding by using forces such as foaming force, vulcanization bridging force, and material rebound force.

[0071] In some embodiments, such as Figure 17 As shown, when the first foreign material 10, the second foreign material 20, and the bonding material 30 are bonded together by a pressing device 40 with a concave-convex surface 41, the concave-convex surface 41 presses the first foreign material 10 and the second foreign material 20 further toward the bonding material 30, so that the first foreign material 10 and the second foreign material 20 can partially compress the bonding material 30 and gradually come together. Utilizing the porosity characteristics of the woven material of the first foreign material 10 and the second foreign material 20, the first foreign material 10 and the second foreign material 20 penetrate into the bonding material 30, further making the first foreign material 10 and the second foreign material 20 partially contact each other to form a plurality of bonding parts 60 similar to the effect of dotting, so that the first foreign material 10 and the second foreign material 20 can be bonded to the first surface 31 and the second surface 32 of the bonding material 30, and can have at least 5% material bonding area through partial contact. At the same time, the bonding material 30 penetrates into the woven fibers of the first foreign material 10 and the second foreign material 20, which helps to improve the bonding strength.

[0072] The above-disclosed embodiments are merely preferred embodiments of this application. It should be noted that any modifications made by those skilled in the art to the specific implementation methods of this application do not depart from the scope of the claims. Accordingly, the scope of the claims of this application is not limited to the aforementioned specific embodiments.

Claims

1. A method for preparing adhesive-free bonded heterogeneous materials, characterized in that, The method includes the following steps: A first foreign material, a second foreign material, and a bonding material are provided. The bonding material can be bonded to the first foreign material and the second foreign material by compression force and foaming force. The bonding material includes a first surface and a second surface. The first foreign material, the second foreign material, and the bonding material are conveyed and extruded by a pressing device, wherein the first foreign material is in contact with the first surface, and the second foreign material is in contact with the second surface; When the first foreign material comes into contact with the first surface, the first foreign material and the first surface are bonded together by the foaming force generated by the foaming physical and / or chemical reaction. When the second foreign material comes into contact with the second surface, the second foreign material and the second surface are bonded together by the foaming force generated by the foaming physical and / or chemical reaction. When the first foreign material and the second foreign material are brought into contact, the first foreign material and the second foreign material are bonded together by the foaming force generated by the foaming physical and / or chemical reaction. The first and second materials comprise foamed materials with different properties, the foamed materials comprising one or more of natural rubber, polyurethane, polystyrene, and polyolefin, and the bonding material comprising a braided material having braided pores; When the first foreign material, the second foreign material and the bonding material are bonded together, the first foreign material and the second foreign material form several pseudo-bonded parts between the weave gaps. An air nozzle is provided in the pressing equipment to introduce gas into the pseudo-bonded parts and support the pseudo-bonded parts to form an air cushion. The pressing equipment includes rollers, tracks, and pressure plates, and the surfaces of any one of the rollers, tracks, and pressure plates have symmetrically fitted concave and convex surfaces.

2. The preparation method according to claim 1, characterized in that, The pressing equipment includes one of a roller-type foaming roller press, a tracked foaming roller press, and a platen-type foaming hot press.

3. The preparation method according to claim 1, characterized in that, The first foreign material is bonded to the second foreign material, and the first foreign material and the second foreign material have a contact area when bonded. The contact area ratio is controlled by one or more of the following forces: pressing force, foaming force, vulcanization bridging force and material rebound force.

4. The preparation method according to claim 1, characterized in that, The contact area ratio between the first foreign material and the second foreign material is 0% to 100%.

5. The preparation method according to claim 1, characterized in that, The first and second materials comprise different foaming materials, which include one or more of natural rubber, polyurethane, polystyrene, and polyolefins.

6. The preparation method according to claim 1 or claim 5, characterized in that, The weaving material includes one or more of cotton, polyester fiber, and nylon fiber.

7. A method for bonding heterogeneous materials without adhesive, characterized in that, The adhesive-free bonding heterogeneous material is prepared by the preparation method described in any one of claims 1 to 6.

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