CN113478847B - Vertical face bonding process with controllable glue containing amount - Google Patents

Vertical face bonding process with controllable glue containing amount Download PDF

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Publication number
CN113478847B
CN113478847B CN202110645439.XA CN202110645439A CN113478847B CN 113478847 B CN113478847 B CN 113478847B CN 202110645439 A CN202110645439 A CN 202110645439A CN 113478847 B CN113478847 B CN 113478847B
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bonding
parts
adhesive
cushion layer
bonded
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CN113478847A (en
Inventor
杨小牛
许靖磊
赵晓礼
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Huangpu Institute of Materials
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Huangpu Institute of Materials
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
    • B29C65/523—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive by dipping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/022—Mechanical pre-treatments, e.g. reshaping
    • B29C66/0222—Mechanical pre-treatments, e.g. reshaping without removal of material, e.g. cleaning by air blowing or using brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/022—Mechanical pre-treatments, e.g. reshaping
    • B29C66/0224—Mechanical pre-treatments, e.g. reshaping with removal of material
    • B29C66/02245—Abrading, e.g. grinding, sanding, sandblasting or scraping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the articles
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
    • C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

The invention belongs to the technical field of bonding processes, and particularly relates to a facade bonding process with controllable glue containing amount, which comprises the following steps of: s1: cleaning and drying the bonding surfaces of the bonding object and the bonded object arranged in a vertical plane; s2: placing the structural cushion layer into presoaked glue for dipping treatment, and spreading the dipped structural cushion layer on the bonding surface of the bonding object or the bonded object; s3: bonding the bonding surfaces of the bonded object and the bonded object with the two surfaces of the structural cushion layer respectively, and pressurizing and curing the bonded object, the structural cushion layer and the bonded object to obtain the bonded object. The invention fully utilizes the adsorption effect of the structural cushion layer on the adhesive to realize the control of the adhesive capacity, thereby being convenient for precisely controlling the specification and the thickness of the adhesive piece and being beneficial to improving the performances of the adhesive piece such as tensile shear strength, peel strength and the like; the vertical face bonding process is also suitable for plane bonding, and can meet the requirements of different working conditions.

Description

Vertical face bonding process with controllable glue containing amount
Technical Field
The invention belongs to the technical field of bonding processes, and particularly relates to a facade bonding process with controllable glue containing amount.
Background
Because the bonding strength of the bonding piece is directly affected by the thickness of the adhesive layer, and the thickness of the adhesive layer depends on the adhesive containing amount of the bonding piece, if the adhesive containing amount cannot be controlled, uneven thickness of the adhesive layer is easy to occur at different positions of the bonding piece, so that the bonding strength of the bonding piece is reduced, and the service life of the bonding piece is greatly shortened.
In order to make the bonding thickness or the adhesive holding amount within a controllable range, three methods are currently adopted: (1) Placing a strip-shaped or gasket-shaped cushion layer with a certain thickness between an adhesive and an adhered object, taking out after solidification or taking out before initial solidification, wherein the method easily causes uneven adhesive layers, concentrated internal stress of the adhesive, and the adhesive is most likely to cause the problems of interface detachment or fatigue and the like; if the cushion layer is not taken out, the bonding area is sacrificed, and the actual bonding strength is still greatly reduced. (2) Adopting a mechanical tool to attach the adhesive substance and the adhered substance by applying external force, and controlling the adhesive quantity by controlling the attaching degree; however, the method requires the adhesive piece to have a certain size, the external force applied by the tool is accurate and uniform, and the practical application is extremely inconvenient. (3) The method is only suitable for adhesive with larger viscosity, has a narrower application range and still can cause uneven adhesive distribution although the thickness of the adhesive layer can be effectively controlled by adding the thickness control filler between the adhesive and the adhered object. The greatest disadvantage of the above modes is that: aiming at the control of bonding thickness or glue containing amount in plane bonding, once the vertical face bonding is needed under actual working conditions, particularly when the adhesive with very low viscosity is used, the method can not inhibit the self-flowing of the adhesive, the glue amount of the adhesive is easily lost, and the thickness of the glue layer is uneven, so that the final bonding effect is influenced.
Disclosure of Invention
Aiming at the problems in the background technology, the invention aims to provide the facade bonding process with controllable glue containing amount, which can realize controllable glue containing amount in the facade bonding process and has important significance for improving the performance of bonding pieces and prolonging the service life of the bonding pieces.
Based on the above purpose, the technical scheme provided by the invention is as follows:
in a first aspect, the invention provides a facade bonding process with controllable glue containing amount, which comprises the following steps:
s1: cleaning and drying the bonding surfaces of the bonding object and the bonded object arranged in a vertical plane;
s2: placing the structural cushion layer into presoaked glue for dipping treatment, and spreading the dipped structural cushion layer on the bonding surface of the bonding object or the bonded object;
s3: bonding the bonding surfaces of the bonded object and the bonded object with the two surfaces of the structural cushion layer respectively, and pressurizing and curing the bonded object, the structural cushion layer and the bonded object to obtain the bonded object.
In the step S1, cleaning the bonding surface of the bonded object and the bonded object by using a cleaning agent to remove dust and grease on the surface, and then drying by adopting a plurality of means of natural airing or low-temperature and high-temperature drying according to the self property of the cleaning agent; preferably, volatile organic solvents such as acetone, ethanol or a mixture thereof are used as cleaning agents, and natural drying or low-temperature drying is adopted after cleaning, so that the surfaces of the adhesive and the adhered objects are kept clean and dry.
Mechanically or manually polishing the cleaned and dried bonding surface of the bonding object and the bonding object, wherein the mesh number of the sand paper is 60-150, slightly polishing to avoid damaging or destroying the bonding object or the bonding object matrix, cleaning the bonding surface again according to the cleaning method after polishing, and keeping the bonding surface dry.
The invention adopts a layer of structural cushion layer arranged between an adhesive and an adhered object which are arranged in a vertical plane, and carries out presoaking treatment on the structural cushion layer, and the adhesive surface of the adhesive, the structural cushion layer after the presoaking treatment and the adhesive surface of the adhered object are sequentially attached, pressed and cured to prepare the adhesive. The invention adopts the structure cushion layer arranged between the adhered object and the adhered object, fully utilizes the adsorption effect of the structure cushion layer on the adhesive, and realizes the control of the glue containing amount, thereby being convenient for precisely controlling the specification and the thickness of the adhered piece and being beneficial to improving the performances of the adhered piece, such as tensile shear strength, peel strength and the like; the vertical face bonding process is also suitable for plane bonding, and can meet the requirements of different working conditions.
When there are a plurality of groups of adhesive members, the adhesive treatment of the plurality of groups of adhesive members can be performed sequentially according to a method in which the adhesive, the structural cushion, the adhesive, etc. are alternately arranged in order. When a plurality of groups of vertical faces are needed to be bonded and accurate positioning is needed, the limiting tool is adopted to limit the positions of the bonded objects.
Further, the adhesive and the adhered object are vulcanized diene elastomer or cured polyurethane; wherein the diene elastomer is natural rubber, synthetic polyisoprene, isoprene/butadiene copolymer, isoprene/styrene copolymer, or butadiene/styrene/isoprene copolymer.
Further, the prepreg is an adhesive or an adhesive added with an adhesive aid, a curing agent or a reinforcing filler.
Wherein, the reinforcing filler can be carbon black and/or silica. The adhesive can be the existing commercially available adhesive, is also suitable for the commercially available adhesive with good fluidity, and can also adopt three adhesives with the following formula.
The first adhesive is a modified acrylic adhesive, and specifically comprises the following components in parts by mass: 50 parts of methyl methacrylate, 50 parts of ethyl methacrylate, 10 parts of methacrylic acid, 35 parts of a rubber latex extracting solution, 70 parts of ABS resin, 20 parts of dicumyl peroxide and 5 parts of dimethylaniline.
The second adhesive consists of the following raw materials in parts by mass: 40 parts of methyl methacrylate, 50 parts of ethyl methacrylate, 15 parts of methacrylic acid, 35 parts of rubber latex extract, 72 parts of ABS resin, 25 parts of dicumyl peroxide, 10 parts of dimethylaniline, 5 parts of white carbon black and 10 parts of polydimethylsiloxane.
The third adhesive is cyanoacrylate adhesive, and consists of the following raw materials in parts by mass: 94 parts by mass of ethyl cyanoacrylate, 3 parts by mass of dichloroethane, 25 parts by mass of formaldehyde, 10 parts by mass of dibutyl phthalate, 2 parts by mass of p-toluenesulfonic acid, 0.08 part by mass of hydroquinone, 3 parts by mass of polymethyl methacrylate and 0.05 part by mass of benzoyl peroxide.
The pre-impregnation treatment of the structural backing with the above-mentioned adhesive may be performed by any known manner known in the art and spraying the adhesive onto the adhesive surface or by applying a uniform glue to the adhesive surface with a brush or spatula.
Further, the structural cushion layer is a thin-layer cotton, gauze fabric or nylon filter screen; the thickness of the structural backing layer is preferably 0.05 to 1.00mm.
The structural cushion layer comprises but is not limited to the thin cotton, gauze fabric or nylon filter screen, can adsorb quantitative presoaked glue on the premise of ensuring the bonding strength, ensures that the adhesive adsorbed by the structural cushion layer and the wetting property of the bonding surface are both suitable for the vertical surface bonding process, and ensures that the bonding surface between the adhesive and the bonded object can be uniformly filled with the adhesive in the vertical surface state. The more preferable structural cushion layer can mutually react with the presoaked glue in the complete curing process, and the formed chemical bond enhances the bonding adhesive layer, so that the peeling strength between the bonding object and the bonded object is improved.
Further, the pore diameters of the gauze fabric and the nylon filter screen are uniform, wherein the pore diameter of the gauze fabric is 0.15-2 mm; the aperture of the nylon filter screen is 80-100 meshes.
When thin cotton with the thickness of 0.05-1.00 mm is used as an adsorbable porous structure cushion layer, the tensile shear strength at normal temperature is 2.0-2.8 MPa according to the samples prepared by the methods specified in GB/T7124-2008 and GB/T33334-2016. The test piece prepared according to the method specified in GB/T2791-1995 has a peel strength at normal temperature of 16-25 KN/m and a peel strength at high temperature of 11KN/m.
When the gauze fabric with the aperture size of 0.15-2 mm is used as the absorptive mesh structure cushion layer, the normal temperature tensile shear strength is about 2.2-3.0 MPa according to the samples prepared by GB/T7124-2008 and GB/T33334-2016. The test sample prepared according to GB/T2791-1995 has a normal temperature peel strength of 15-28 KN/m and a high temperature peel strength of 13KN/m.
When the nylon filter screen with 80-100 meshes is used as a structural cushion layer, the normal-temperature tensile shear strength of the samples prepared according to GB/T7124-2008 and GB/T33334-2016 is between 2.5 and 3.1 MPa. The test sample prepared according to GB/T2791-1995 has a normal temperature peel strength of 18-32 KN/m and a high temperature peel strength of 14KN/m.
Further, the pressure applied to the adhesive, the structural cushion and the adhered in the step S3 is 0.01MPa to 0.02MPa, and the pressure is maintained for 10 min to 30min.
The pressure applied to the adhesive, the structural cushion layer and the adhered material is related to the adhesive, the structural cushion layer and the adhered material to a certain extent, the preferable curing pressure is 0.01-0.02 MPa under the selected material, the pressure maintaining time is 10-30 min, and the adhesive can be prepared under the curing pressure and the pressure maintaining action time, so that the adhesive containing amount is controllable, and the adhesive has better peeling strength and tensile shear strength.
In a second aspect, the application of the controllable adhesive-containing amount vertical face bonding process in bonding of spokes and tread of a non-pneumatic tire is provided.
In a third aspect, the present invention provides an adhesive article made by the foregoing bonding process, the adhesive article comprising an adhesive article, an adherend, and a structural backing layer disposed between the adhesive article and the adherend; the adhesive and the adhered object in the adhesive piece are vulcanized diene elastomer or cured polyurethane; the diene elastomer is natural rubber, synthetic polyisoprene, isoprene/butadiene copolymer, isoprene/styrene copolymer, or butadiene/styrene/isoprene copolymer; the structural cushion layer is used for bonding an adhesive and an adhered object after being subjected to presoaked; the structural cushion layer is a thin cotton, gauze fabric or nylon filter screen; the thickness of the structural cushion layer is 0.05-1.00 mm.
In a fourth aspect, the present invention provides a prepreg for use in the above-described fagade bonding process, the prepreg being an adhesive or an adhesive with an adhesive aid, a curing agent or a reinforcing filler, wherein the reinforcing filler is selected from carbon black and/or silica. The adhesive can be the existing commercially available adhesive and is also suitable for the commercially available adhesive with good fluidity.
Further, the prepreg is any one of the following three adhesives;
the first adhesive is a modified acrylic adhesive, and specifically comprises the following components in parts by mass: 50 parts of methyl methacrylate, 50 parts of ethyl methacrylate, 10 parts of methacrylic acid, 35 parts of rubber latex extract, 70 parts of ABS resin, 20 parts of dicumyl peroxide and 5 parts of dimethylaniline;
the second adhesive consists of the following raw materials in parts by mass: 40 parts of methyl methacrylate, 50 parts of ethyl methacrylate, 15 parts of methacrylic acid, 35 parts of rubber latex extract, 72 parts of ABS resin, 25 parts of dicumyl peroxide, 10 parts of dimethylaniline, 5 parts of white carbon black and 10 parts of polydimethylsiloxane;
the third adhesive is cyanoacrylate adhesive, and consists of the following raw materials in parts by mass: 94 parts by mass of ethyl cyanoacrylate, 3 parts by mass of dichloroethane, 25 parts by mass of formaldehyde, 10 parts by mass of dibutyl phthalate, 2 parts by mass of p-toluenesulfonic acid, 0.08 part by mass of hydroquinone, 3 parts by mass of polymethyl methacrylate and 0.05 part by mass of benzoyl peroxide.
Compared with the prior art, the invention has the following beneficial effects:
the invention adopts the structure cushion layer prepreg to treat, utilizes the adsorption effect of the structure cushion layer with a net-shaped or hole-shaped structure on the adhesive, realizes the control of the adhesive containing amount by controlling the thickness of the structure cushion layer, and carries out pressurizing, solidifying and bonding on the adhesive and the adhered object by the structure cushion layer after the dipping treatment, thereby being beneficial to improving the uniform distribution of the adhesive liquid between the adhesive and the adhered object and enhancing the bonding performance of the adhesive; the bonding process is not only suitable for plane bonding, but also particularly suitable for vertical surface bonding, can meet the requirements of different working conditions, and has extremely high popularization and application values.
Detailed Description
For a better description of the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to the following specific examples. It will be appreciated by persons skilled in the art that the specific embodiments described herein are for purposes of illustration only and are not intended to be limiting.
The test methods used in the examples are conventional methods unless otherwise specified; the materials, reagents and the like used, unless otherwise specified, are all commercially available.
Example 1
The embodiment provides a facade bonding process with controllable glue containing amount, and materials adopted in the bonding process comprise a bonding object, a bonded object, an adhesive and a structural cushion layer, wherein the bonding object takes vulcanized natural rubber as an example, and the bonded object takes the vulcanized natural rubber as an example.
The adhesive-containing quantity controllable vertical face adhesive bonding process comprises the following bonding steps:
s1: and (3) cleaning the bonding surface of the vulcanized natural rubber by using industrial alcohol or acetone as a cleaning agent, and then drying the bonding surface of the vulcanized natural rubber at a low temperature of 50 ℃ for 5 min.
S2: mechanically polishing the bonding surface of the vulcanized natural rubber by using 80-mesh sand paper for 6 rounds, then cleaning the bonding surface again by using acetone, drying for 5min at 50 ℃, and keeping the bonding surface dry; and the non-bonding surface of the vulcanized natural rubber is treated by using the shielding adhesive tape, so that the glue solution is prevented from flowing to the non-bonding surface in the bonding process to influence the appearance.
S3: preparation of an adhesive: in this embodiment, the modified acrylic adhesive is used as an example for vertical surface adhesion, and the modified acrylic adhesive is composed of the following raw materials in parts by mass: 50 parts of methyl methacrylate, 50 parts of ethyl methacrylate, 10 parts of methacrylic acid, 35 parts of a rubber latex extracting solution, 70 parts of ABS resin, 20 parts of dicumyl peroxide and 5 parts of dimethylaniline.
Or the modified acrylic adhesive is composed of the following raw materials in parts by mass: 40 parts of methyl methacrylate, 50 parts of ethyl methacrylate, 15 parts of methacrylic acid, 35 parts of rubber latex extract, 72 parts of ABS resin, 25 parts of dicumyl peroxide, 10 parts of dimethylaniline, 5 parts of white carbon black and 10 parts of polydimethylsiloxane.
S4: pre-soaking the absorptive mesh/hole-shaped structure cushion layer by using the adhesive, and spreading the absorptive mesh/hole-shaped structure cushion layer on the bonding surface of vulcanized natural rubber; the adhesive may be uniformly applied to the bonding surface of the vulcanized natural rubber by any known means such as spraying or brushing with a brush or spatula.
When the bonding pieces are only one or more groups, the bonding pieces can be sequentially and vertically bonded, namely the bonding surfaces of two pieces of vulcanized natural rubber are mutually bonded, the bonding pieces are fixed under the pressure of 0.01-0.02 MPa, the pressure is maintained for 10-30 min, then the adhesive is sprayed on the dust-free cloth to remove the overflowed adhesive at the bonding gap, the overflowed adhesive is extremely small, and the adhesive can be removed by spraying the adhesive, so that the attractiveness of the bonding pieces is maintained.
When a plurality of groups of bonding pieces are needed to be bonded in the vertical plane and positioned accurately, the position of the bonding part is limited by adopting a limiting tool, then the pressure of 0.01 MPa-0.02 MPa is applied mechanically uniformly, the pressure is maintained for 10-30 min, and then the glue releasing agent is sprayed on the dust-free cloth to remove the glue overflowing from the bonding gap.
In this example, when thin cotton having a thickness of 0.05 to 1.00mm and a bonding area (25 mm. Times.70 mm) as the adsorbable porous structure pad layer was used, the room temperature tensile shear strength was 2.0 to 2.8MPa according to the samples prepared in GB/T7124-2008 and GB/T33334-2016. The test sample prepared according to GB/T2791-1995 has a peel strength at normal temperature of 16-21 KN/m and a peel strength at high temperature of 11KN/m.
In this embodiment, when the absorbent mesh pad is a gauze fabric, the gauze fabric is required to have a uniform pore size, a pore size of 0.15 to 2mm, preferably 2mm by 2mm, more preferably 0.15mm by 0.15mm, and a tolerance of ±0.02mm, and a room temperature tensile shear strength of 2.2 to 3.0MPa according to the test sample prepared in GB/T7124-2008 and GB/T33334-2016. The test sample prepared according to GB/T2791-1995 has a normal temperature peel strength of 15-23 KN/m and a high temperature peel strength of 13KN/m.
In this embodiment, the adsorbable mesh-structure pad layer is a filter screen or mesh-shaped filter cloth, preferably a nylon filter screen of 100 mesh, more preferably a nylon filter screen of 80 mesh, and the room temperature tensile shear strength is between 2.5 and 3.1MPa according to the test sample prepared by GB/T7124-2008 and GB/T33334-2016. The test sample prepared according to GB/T2791-1995 has a normal temperature peel strength of 18-30 KN/m and a high temperature peel strength of 14KN/m.
In this embodiment, the specific data relationship among the area of the bonding area (25 mm×70 mm), the thickness of the adhesive layer of the bonding area and the amount of the adhesive is related to the middle structural pad layer, and when the structural pad layer is thin cotton, the thickness has an important effect on the bonding performance, so the thickness of the thin cotton is used as a test index; when gauze and nylon filter screen are used as the structural cushion layer, the pore size has an important influence on the final bonding performance in the range of 0.05-1.00 mm of the thickness of the structural cushion layer specified by the invention, so the pore size is used as a test index. In the test, the thickness of the gauze fabric and the nylon filter screen is 0.45mm. The bonding thickness refers to the thickness of the final intermediate bonding layer after complete curing, and the final intermediate bonding layer comprises an adsorbable mesh-structure cushion layer and a mixture of various basic components and/or an intermediate phase generated by in-situ reaction. The thickness of the adhesive layer is judged by the size of an actual sample, meanwhile, the adhesive is directly brushed on the bonding surface of the vulcanized natural rubber to perform equal pressure treatment and the like without adding any structural cushion layer, and specific test parameters and test results are shown in table 1, which show that the invention can realize the control of the thickness of the adhesive layer by adding the structural cushion layer treated by the prepreg between the adhesive and the adhered object, thereby being convenient for accurately controlling the specification and the thickness of the adhesive, and compared with the mode of bonding without adding the structural cushion layer, the invention adopts the structure cushion layer between the adhesive and the adhered object to help to improve the performances of the adhesive, such as tensile shear strength, peel strength and the like.
TABLE 1 bonding area parameters and bonding element Performance index for unstructured backing/different structured backing
Example 2
The embodiment provides a controllable sol amount vertical face bonding process, wherein materials adopted in the bonding process comprise an adhesive-vulcanized natural rubber, an adherend-cured PPDI type polyurethane and an adhesive layer. The vertical face bonding process provided by the embodiment is suitable for bonding the spoke and the tread of the non-pneumatic tire.
The elevation bonding step with controllable glue containing amount in the embodiment is as follows:
s1: and (3) cleaning the bonding surface of the vulcanized natural rubber and the cured polyurethane by using industrial alcohol or acetone as a cleaning agent, and then drying the bonding surface at 50 ℃ for 5 min.
S2: and mechanically polishing the bonding surface of the vulcanized natural rubber and the cured polyurethane by adopting 80-mesh sand paper for 6 rounds, then cleaning the bonding surface of the vulcanized natural rubber and the cured polyurethane again by using acetone, drying for 5 minutes again at 50 ℃, and keeping the drying of the bonding surface. If necessary, the non-bonding surface of the vulcanized natural rubber and the cured polyurethane can be treated by using a masking tape, so that the glue solution is prevented from flowing to the non-bonding surface in the bonding process to influence the appearance.
S3: preparation of an adhesive: in the embodiment, the cyanoacrylate adhesive is taken as an example for vertical surface bonding, and the cyanoacrylate adhesive comprises the following raw materials in parts by mass: 94 parts by mass of ethyl cyanoacrylate, 3 parts by mass of dichloroethane, 25 parts by mass of formaldehyde, 10 parts by mass of dibutyl phthalate, 2 parts by mass of p-toluenesulfonic acid, 0.08 part by mass of hydroquinone, 3 parts by mass of polymethyl methacrylate and 0.05 part by mass of benzoyl peroxide.
S4: pre-impregnating the adsorbable mesh/porous structure mat with the adhesive and then spreading it on the bonding surface of the vulcanized natural rubber; the adhesive may be applied uniformly to the bonding surface of the vulcanized natural rubber by any known means such as spraying or brushing with a brush or spatula.
When the bonding pieces are only one or more groups, the bonding pieces can be sequentially and vertically bonded, bonding surfaces of the vulcanized natural rubber and the polyurethane are mutually bonded, the bonding pieces are fixed under the pressure of 0.01-0.02 MPa, the pressure is maintained for 10-30 min, then the adhesive is sprayed on the dust-free cloth to remove the overflowed adhesive at the bonding gap, the overflowed adhesive is extremely small, and the adhesive can be removed by spraying the adhesive, so that the attractiveness of the bonding pieces is maintained.
When a plurality of groups of bonding pieces are needed to be bonded in the vertical plane and positioned accurately, the position of the bonding part is limited by adopting a limiting tool, then the pressure of 0.01 MPa-0.02 MPa is applied mechanically uniformly, the pressure is maintained for 10-30 min, and then the glue releasing agent is sprayed on the dust-free cloth to remove the glue overflowing from the bonding gap.
In this example, when thin cotton having a thickness of 0.05 to 1.00mm and a bonding area equal to or greater than 25mm (70 mm) was used as the adsorbable porous structure pad layer, the room temperature tensile shear strength was 2.2 to 2.6MPa according to the samples prepared in GB/T7124-2008 and GB/T33334-2016. The test sample prepared according to GB/T2790-1995 has a normal temperature peel strength of 18-25 KN/m and a high temperature peel strength of 12KN/m.
In this embodiment, when the absorbent mesh-like structure pad layer is a gauze fabric, the gauze fabric is required to have a uniform pore diameter, preferably a pore size of 2mm x 2mm, more preferably 0.15mm x 0.15mm, and a tolerance of ±0.02mm, and the room temperature tensile shear strength is between 2.3 and 2.7MPa according to the samples prepared in GB/T7124-2008 and GB/T33334-2016. The test sample prepared according to GB/T2790-1995 has a normal temperature peel strength of 16-28 KN/m and a high temperature peel strength of 13KN/m.
In this embodiment, the adsorbable mesh-structure pad layer is a filter screen or mesh-shaped filter cloth, preferably a nylon filter screen of 150 mesh, more preferably a nylon filter screen of 100 mesh, and the room temperature tensile shear strength is between 2.5 and 3.0MPa according to the test sample prepared by GB/T7124-2008 and GB/T33334-2016. The test sample prepared according to GB/T2790-1995 has a normal temperature peel strength of 28-32 KN/m and a high temperature peel strength of 14KN/m.
In this embodiment, specific data relationship among the area of the bonding area (25 mm by 70 mm), the thickness of the adhesive layer of the bonding area and the amount of the adhesive is related to the middle structural cushion layer, meanwhile, the adhesive is directly brushed on the bonding surface of the vulcanized natural rubber to perform equal pressure treatment and the like without adding any structural cushion layer, specific test parameters and test results are shown in table 2, and meanwhile, the results in table 1 are combined, so that under the same structural cushion layer specification condition, the difference between the thickness of the adhesive layer and the amount of the adhesive is small, which indicates that the invention can realize the control of the thickness of the adhesive layer by adding the structural cushion layer of the prepreg between the bonded object and the bonded object, thereby being convenient for precisely controlling the specification and the thickness of the bonded object.
Table 2 bonding area parameters and performance indices of bonding elements corresponding to different structural mats
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present invention.

Claims (4)

1. The vertical face bonding process with controllable glue containing amount is characterized by comprising the following steps of:
s1: cleaning and drying the bonding surfaces of the bonding object and the bonded object arranged in a vertical plane;
s2: placing the structural cushion layer into presoaked glue for dipping treatment, and spreading the dipped structural cushion layer on the bonding surface of the bonding object or the bonded object;
s3: bonding the bonding surfaces of the bonded object and the bonded object with two surfaces of the structural cushion layer respectively, and pressurizing and curing the bonded object, the structural cushion layer and the bonded object to obtain a bonding piece;
the adhesive and the adhered object are vulcanized diene elastomer or cured polyurethane;
the structural cushion layer is a thin cotton, gauze fabric or nylon filter screen; the thickness of the structural cushion layer is 0.05-1.00 mm; the pore diameters of the gauze fabric and the nylon filter screen are uniform, wherein the pore diameter of the gauze fabric is 0.15-2 mm; the aperture of the nylon filter screen is 80-100 meshes;
the pressure applied to the adhesive, the structural cushion layer and the adhered object in the step S3 is 0.01 MPa-0.02 MPa, and the pressure is maintained for 10-30 min;
the prepreg is an adhesive added with a curing agent or a reinforcing filler;
the prepreg is any one of the following three adhesives;
the first adhesive is a modified acrylic adhesive, and specifically comprises the following components in parts by mass: 50 parts of methyl methacrylate, 50 parts of ethyl methacrylate, 10 parts of methacrylic acid, 35 parts of rubber latex extract, 70 parts of ABS resin, 20 parts of dicumyl peroxide and 5 parts of dimethylaniline;
the second adhesive consists of the following raw materials in parts by mass: 40 parts of methyl methacrylate, 50 parts of ethyl methacrylate, 15 parts of methacrylic acid, 35 parts of rubber latex extract, 72 parts of ABS resin, 25 parts of dicumyl peroxide, 10 parts of dimethylaniline, 5 parts of white carbon black and 10 parts of polydimethylsiloxane;
the third adhesive is cyanoacrylate adhesive, and consists of the following raw materials in parts by mass: 94 parts by weight of ethyl cyanoacrylate, 3 parts by weight of dichloroethane, 25 parts by weight of formaldehyde, 10 parts by weight of dibutyl phthalate, 2 parts by weight of p-toluenesulfonic acid, 0.08 part by weight of hydroquinone, 3 parts by weight of polymethyl methacrylate and 0.05 part by weight of benzoyl peroxide;
the structural cushion layer can mutually react with the prepreg in the complete curing process, and the formed chemical bond enhances the bonding adhesive layer, so that the peeling strength between the bonding object and the bonded object is improved.
2. The fagade bonding process according to claim 1, wherein the diene elastomer is natural rubber, synthetic polyisoprene, isoprene/butadiene copolymer, isoprene/styrene copolymer, or butadiene/styrene/isoprene copolymer.
3. Use of the bonding process according to any one of claims 1 to 2 for bonding spokes of a non-pneumatic tire to a tread.
4. The bonding element prepared by the bonding process according to any one of claims 1 to 2, wherein the bonding element comprises an object to be bonded, and a structural mat layer laid between the object to be bonded and the object to be bonded; the adhesive and the adhered object in the adhesive piece are vulcanized diene elastomer or cured polyurethane; the diene elastomer is natural rubber, synthetic polyisoprene, isoprene/butadiene copolymer, isoprene/styrene copolymer, or butadiene/styrene/isoprene copolymer; the structural cushion layer is used for bonding an adhesive and an adhered object after being subjected to presoaked; the structural cushion layer is a thin cotton, gauze fabric or nylon filter screen; the thickness of the structural cushion layer is 0.05-1.00 mm; the pore diameters of the gauze fabric and the nylon filter screen are uniform, wherein the pore diameter of the gauze fabric is 0.15-2 mm; the aperture of the nylon filter screen is 80-100 meshes.
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