A glue curing method with improved thermal penetration

Abstract

The present invention relates to the technical field of glue curing, and discloses a glue curing method with improved thermal penetration, comprising the following steps: (1) first, applying special glue to an area to be coated, and then laminating; (2) pre-illuminating the article after laminating with the special glue with an ultraviolet lamp, wherein the pre-illumination time does not exceed 15 seconds; (3) performing intermittent microwave drying after the ultraviolet lamp pre-illumination treatment; the present invention mainly accelerates the complete curing efficiency of the glue by improving the thermal penetration of the glue, and can greatly improve the hardness and peel strength of the glue after curing, thereby showing excellent adhesive performance.

Description

Technical Field

[0001] The invention relates to the technical field of glue curing, in particular to a glue curing method for improving thermal penetration. Background Art

[0002] Glue is an intermediate that connects two materials. It mostly appears in the form of water and belongs to the category of fine chemicals. There are many types of glue, which are mainly classified by adhesive, physical form, hardening method and adherend material. Common ones include instant glue, epoxy resin adhesive, anaerobic glue, UV glue, etc. The emergence of glue provides another possibility for the connection between objects. In addition, the glue has high bonding cleanliness, the finished product is relatively neat and beautiful, and no structure is added. Therefore, the glue bonding connection method is widely used.

[0003] There are many ways to cure glue, the most commonly used ones are natural curing and heat curing. However, natural curing takes a very long time to fully cure. Moreover, if the glued objects are easily touched before it is fully cured, the glued objects will separate due to insufficient bonding strength, which will cause the bonding to fail and require re-bonding, which is time-consuming and labor-intensive.

[0004] Based on this, we proposed a glue curing method that improves thermal penetration, hoping to solve the shortcomings of the existing technology. Summary of the Invention

[0005] (1) Technical problems solved

[0006] In view of the deficiencies of the prior art, the present invention provides a glue curing method with improved thermal penetration.

[0007] (2) Technical solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0009] A glue curing method for improving thermal penetration includes the following steps:

[0010] (1) First, apply the special glue to the area to be coated, and then adhere;

[0011] (2) Pre-illumination treatment of the items after the special glue is applied with ultraviolet light;

[0012] The pre-illumination time shall not exceed 15s;

[0013] (3) After pre-illumination with ultraviolet light, the product is subjected to intermittent microwave drying.

[0014] As a further technical solution, the coating amount of the special glue in step (1) is 100-150g / m 2.

[0015] As a further technical solution, the special glue comprises the following ingredients by weight: 57-68 parts of acrylic adhesive, 5-6 parts of nanofiller, 0.3-0.5 parts of nano photocatalyst, 1-1.5 parts of sodium dodecylbenzoate sulfonate, and 20-30 parts of solvent.

[0016] As a further technical solution: the nanofiller is nano-silicon dioxide.

[0017] As a further technical solution: the method for preparing the nano-photocatalyst is:

[0018] First, ferric chloride and zinc sulfate were added to deionized water, the temperature was adjusted to 70-75°C, and the mixture was stirred for 10 minutes. Then, the pH of the system was adjusted to 10.5, and the mixture was stirred for 2 hours. The mixture was then centrifuged at high speed, allowed to stand for 1 hour, and filtered to obtain a reactant.

[0019] The reaction mixture was added to anhydrous ethanol, subjected to ultrasonic treatment for 15 minutes, filtered, dried, heated to 650° C., kept warm for 3 hours, and cooled to room temperature to obtain a nano-photocatalyst.

[0020] As a further technical solution, the molar ratio of the ferric chloride to the zinc sulfate is 1:5-6;

[0021] The mixing mass ratio of the zinc sulfate and deionized water is 1:10;

[0022] The pH system was adjusted by using a sodium hydroxide solution with a mass fraction of 10%.

[0023] As a further technical solution: the solvent is water.

[0024] As a further technical solution: the ultraviolet lamp adopts a 1000W mercury lamp.

[0025] As a further technical solution: the intermittent microwave drying process is:

[0026] First, use 30W microwave to treat for 1 minute, then rest for 30 seconds, then use 40W microwave to treat for 3 minutes, rest for 30 seconds, and then use 60W microwave to treat for 3 minutes.

[0027] (3) Beneficial effects

[0028] Compared with the prior art, the present invention provides a glue curing method that improves thermal penetration and has the following beneficial effects:

[0029] The present invention mainly accelerates the complete curing efficiency of the glue by improving the thermal penetration of the glue, and can greatly improve the hardness and peel strength of the glue after curing, thereby showing excellent adhesive performance.

[0030] The present invention introduces nano-photocatalysts into special glue. When pre-illuminated by ultraviolet lamps, a photocatalytic effect occurs, which prompts catalytic changes in the internal structure of the glue and forms slight cross-linking. In addition, nano-silica fillers form fulcrums, which provide multiple complex channels for heat transfer. Combined with intermittent microwave drying, water molecules begin to vibrate under the action of microwaves. Due to the friction between the vibrations of molecules, frictional heat is generated, which leads to a continuous rise in temperature. The temperature is then transmitted to various places through the transmission channel, which can greatly promote the cross-linking and polymerization of various acrylate monomers to form macromolecular chains, prompting the entire glue to change from liquid to solid and exhibit extremely strong viscosity. The water in the glue evaporates quickly, the curing speed is greatly increased, the hardness of the cured glue is significantly increased, and the peel strength is greatly enhanced. DETAILED DESCRIPTION

[0031] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Example 1

[0033] A glue curing method for improving thermal penetration includes the following steps:

[0034] (1) First, apply the special glue to the area to be coated, and then laminate; the amount of special glue applied is 120g / m 2 The special glue is made of the following ingredients by weight: 57 parts of acrylic adhesive, 5 parts of nanofiller, 0.3 parts of nanophotocatalyst, 1 part of sodium sulfonate dodecylbenzoate, and 20 parts of water; the nanofiller is nanosilica; the preparation method of the nanophotocatalyst is:

[0035] First, ferric chloride and zinc sulfate were added to deionized water, respectively, and the temperature was adjusted to 70°C, and the mixture was stirred for 10 minutes. Then, the pH of the system was adjusted to 10.5, and the mixture was stirred for 2 hours. The mixture was then subjected to high-speed centrifugation, allowed to stand for 1 hour, and filtered to obtain the reactant.

[0036] The reaction mixture was added to anhydrous ethanol, ultrasonically treated for 15 minutes, filtered, dried, and then heated to 650°C for 3 hours and cooled to room temperature to obtain a nano-photocatalyst; the molar ratio of ferric chloride to zinc sulfate was 1:5;

[0037] The mixing mass ratio of the zinc sulfate and deionized water is 1:10;

[0038] The pH system was adjusted by using a sodium hydroxide solution with a mass fraction of 10%.

[0039] (2) Pre-illumination treatment of the items after the special glue is applied with ultraviolet light;

[0040] The pre-illumination time is 8s;

[0041] (3) After the pre-illumination treatment with ultraviolet light, the intermittent microwave drying treatment is performed; the intermittent microwave drying treatment is as follows:

[0042] First, use 30W microwave to treat for 1 minute, then rest for 30 seconds, then use 40W microwave to treat for 3 minutes, rest for 30 seconds, and then use 60W microwave to treat for 3 minutes.

[0043] Example 2

[0044] A glue curing method for improving thermal penetration includes the following steps:

[0045] (1) First, apply the special glue to the area to be coated, and then laminate; the amount of special glue applied is 120g / m 2 The special glue comprises the following ingredients by weight: 62 parts of acrylic adhesive, 5.5 parts of nanofiller, 0.35 parts of nanophotocatalyst, 1.2 parts of sodium sulfonate dodecylbenzoate, and 25 parts of water; the nanofiller is nanosilica; the preparation method of the nanophotocatalyst is as follows:

[0046] First, ferric chloride and zinc sulfate were added to deionized water, the temperature was adjusted to 72°C, and the mixture was stirred for 10 minutes. Then, the pH of the system was adjusted to 10.5, and the mixture was stirred for 2 hours. The mixture was then centrifuged at high speed, allowed to stand for 1 hour, and filtered to obtain the reactant.

[0047] The reaction mixture was added to anhydrous ethanol, ultrasonically treated for 15 minutes, filtered, dried, and then heated to 650°C for 3 hours and cooled to room temperature to obtain a nano-photocatalyst; the molar ratio of ferric chloride to zinc sulfate was 1:5.2;

[0048] The mixing mass ratio of the zinc sulfate and deionized water is 1:10;

[0049] The pH system was adjusted by using a sodium hydroxide solution with a mass fraction of 10%.

[0050] (2) Pre-illumination treatment of the items after the special glue is applied with ultraviolet light;

[0051] The pre-illumination time is 10s;

[0052] (3) After the pre-illumination treatment with ultraviolet light, the intermittent microwave drying treatment is performed; the intermittent microwave drying treatment is as follows:

[0053] First, use 30W microwave to treat for 1 minute, then rest for 30 seconds, then use 40W microwave to treat for 3 minutes, rest for 30 seconds, and then use 60W microwave to treat for 3 minutes.

[0054] Example 3

[0055] A glue curing method for improving thermal penetration includes the following steps:

[0056] (1) First, apply the special glue to the area to be coated, and then laminate; the amount of special glue applied is 120g / m 2 The special glue comprises the following ingredients by weight: 63 parts of acrylic adhesive, 5.2 parts of nanofiller, 0.4 parts of nanophotocatalyst, 1.2 parts of sodium dodecylbenzoate sulfonate, and 25 parts of water; the nanofiller is nanosilica; the preparation method of the nanophotocatalyst is as follows:

[0057] First, ferric chloride and zinc sulfate were added to deionized water, the temperature was adjusted to 73°C, and the mixture was stirred for 10 minutes. Then, the pH of the system was adjusted to 10.5, and the mixture was stirred for 2 hours. The mixture was then centrifuged at high speed, allowed to stand for 1 hour, and filtered to obtain the reactant.

[0058] The reaction mixture was added to anhydrous ethanol, ultrasonically treated for 15 minutes, filtered, dried, and then heated to 650°C for 3 hours and cooled to room temperature to obtain a nano-photocatalyst; the molar ratio of ferric chloride to zinc sulfate was 1:5.5;

[0059] The mixing mass ratio of the zinc sulfate and deionized water is 1:10;

[0060] The pH system was adjusted by using a sodium hydroxide solution with a mass fraction of 10%.

[0061] (2) Pre-illumination treatment of the items after the special glue is applied with ultraviolet light;

[0062] The pre-illumination time is 10s;

[0063] (3) After the pre-illumination treatment with ultraviolet light, the intermittent microwave drying treatment is performed; the intermittent microwave drying treatment is as follows:

[0064] First, use 30W microwave to treat for 1 minute, then rest for 30 seconds, then use 40W microwave to treat for 3 minutes, rest for 30 seconds, and then use 60W microwave to treat for 3 minutes.

[0065] Example 4

[0066] A glue curing method for improving thermal penetration includes the following steps:

[0067] (1) First, apply the special glue to the area to be coated, and then laminate; the amount of special glue applied is 120g / m 2 The special glue is made of the following ingredients by weight: 68 parts of acrylic adhesive, 6 parts of nanofiller, 0.5 parts of nanophotocatalyst, 1.5 parts of sodium sulfonate dodecylbenzoate, and 30 parts of water; the nanofiller is nanosilica; the preparation method of the nanophotocatalyst is:

[0068] First, ferric chloride and zinc sulfate were added to deionized water, respectively, and the temperature was adjusted to 75°C, and the mixture was stirred for 10 minutes. Then, the pH of the system was adjusted to 10.5, and the mixture was stirred for 2 hours. The mixture was then centrifuged at high speed, allowed to stand for 1 hour, and filtered to obtain the reactant.

[0069] The reaction mixture was added to anhydrous ethanol, ultrasonically treated for 15 minutes, filtered, dried, and then heated to 650°C for 3 hours and cooled to room temperature to obtain a nano-photocatalyst; the molar ratio of ferric chloride to zinc sulfate was 1:6;

[0070] The mixing mass ratio of the zinc sulfate and deionized water is 1:10;

[0071] The pH system was adjusted by using a sodium hydroxide solution with a mass fraction of 10%.

[0072] (2) Pre-illumination treatment of the items after the special glue is applied with ultraviolet light;

[0073] The pre-illumination time is 12s;

[0074] (3) After the pre-illumination treatment with ultraviolet light, the intermittent microwave drying treatment is performed; the intermittent microwave drying treatment is as follows:

[0075] First, use 30W microwave to treat for 1 minute, then rest for 30 seconds, then use 40W microwave to treat for 3 minutes, rest for 30 seconds, and then use 60W microwave to treat for 3 minutes.

[0076] Comparative Example 1:

[0077] The difference from Example 1 is that no nano-photocatalyst is added to the special adhesive, and the rest of the technical solutions remain unchanged.

[0078] Comparative Example 2:

[0079] The difference from Example 1 is that no ultraviolet lamp pre-illumination treatment is performed, and the other technical solutions remain unchanged.

[0080] Comparative Example 3

[0081] Different from Example 1, a constant 30W microwave treatment was adopted, the total time was the same, and the other technical solutions remained unchanged.

[0082] test:

[0083] hardness

[0084] According to GB / T 532-1999, the hardness of the cured glue is tested at 20°C using a Shore A hardness tester:

[0085] After curing the samples of the embodiment and the comparative example, the following tests were performed:

[0086] Table 1

[0087] Shore A hardness Example 1 93 Example 2 91 Example 3 93 Example 4 90 Comparative Example 1 72 Comparative Example 2 73 Comparative Example 3 82

[0088] As can be seen from Table 1, the hardness of the glue of the present invention after curing is significantly improved.

[0089] 180° peel strength

[0090] The two glass plates were bonded with the glue of the embodiment and the comparative example and cured. The tensile strength was measured using a tensile testing machine according to GB / T2790-1995 at a temperature of 25°C and a tensile rate of 100 mm / min. The numerical value is expressed as N / 25 mm:

[0091] Table 2

[0092]

[0093]

[0094] It can be seen from Table 2 that the peel strength after curing by the curing method of the present invention is greatly improved.

[0095] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A glue curing method for improving thermal penetration, characterized in that: The following steps are involved: (1) First, a special glue is applied to the area to be coated, and then the adhesive is laminated. The special glue comprises the following components by weight: 57-68 parts of acrylic adhesive, 5-6 parts of nanofiller, 0.3-0.5 parts of nano photocatalyst, 1-1.5 parts of sodium dodecylbenzoate sulfonate, and 20-30 parts of solvent; The nano photocatalyst preparation method comprises the following steps: first, ferric chloride and zinc sulfate are added to deionized water respectively, the temperature is adjusted to 70-75°C, the mixture is kept warm and stirred for 10 minutes, the pH of the system is adjusted to 10.5, the mixture is kept warm and stirred for 2 hours, high-speed centrifugation is performed, the mixture is allowed to stand for 1 hour, and the mixture is filtered to obtain a reactant; the reaction mixture is added to anhydrous ethanol, ultrasonically treated for 15 minutes, filtered, dried, heated to 650°C, kept warm for 3 hours, and cooled to room temperature to obtain a nano photocatalyst; (2) Pre-irradiate the items after applying the special glue with ultraviolet light; The pre-illumination time shall not exceed 15s; (3) After pre-irradiation with ultraviolet light, the product is subjected to intermittent microwave drying; The intermittent microwave drying process is as follows: first, for the first minute, use 30W microwaves for treatment, then pause for 30 seconds, then use 40W microwaves for treatment for 3 minutes, pause for 30 seconds, and then use 60W microwaves for treatment for 3 minutes.

2. A glue curing method for improving thermal penetration according to claim 1, characterized in that: The coating amount of the special glue described in step (1) is 100-150g / m².

3. The glue curing method for improving thermal penetration according to claim 1, characterized in that: The nano filler is nano silicon dioxide.

4. The glue curing method for improving thermal penetration according to claim 1, characterized in that: The molar ratio of ferric chloride to zinc sulfate is 1:5-6; The mixing mass ratio of the zinc sulfate and deionized water is 1:10; The pH system was adjusted using a 10% by mass sodium hydroxide solution.

5. The glue curing method for improving thermal penetration according to claim 1, characterized in that: The solvent is water.

6. The glue curing method for improving thermal penetration according to claim 1, characterized in that: The ultraviolet lamp adopts a 1000W mercury lamp.

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