CN-122011957-A - High-adhesion glue spreading plate and preparation method thereof

Abstract

The application relates to the field of glue plates, and particularly discloses a high-adhesion glue plate and a preparation method thereof; the application relates to a high-adhesion rubberized plate, which comprises a substrate, a first adhesive layer and a second adhesive layer, wherein the first adhesive layer comprises, by weight, 70-90 parts of aqueous latex, 0.5-1.5 parts of a dispersing agent, 0.5-1 part of a defoaming agent, 0.5-1 part of a preservative, 5-8 parts of a tackifier, 10-30 parts of water and 5-8 parts of lithium silicate.

Inventors

• GUO JINWANG
• JIANG XUEWEN
• SHEN LONGBIN
• WANG LEI
• Zhao Hanzhe
• WANG NING

Assignees

• 浙江华普新材股份有限公司

Dates

Publication Date

20260512

Application Date

20260314

Claims (10)

1. 1. The high-adhesion rubberized plate is characterized by comprising a substrate, a first adhesive layer and a second adhesive layer, wherein the first adhesive layer comprises, by weight, 70-90 parts of aqueous latex, 0.5-1.5 parts of a dispersing agent, 0.5-1 part of a defoaming agent, 0.5-1 part of a preservative, 5-8 parts of a tackifier, 10-30 parts of water and 5-8 parts of lithium silicate.
2. 2. The high adhesion coated board of claim 1, wherein the second glue layer comprises, by weight, 70-90 parts of aqueous latex, 5-20 parts of water, 3-5 parts of film forming aids, and 0.3-0.5 parts of cellulose ether.
3. 3. The high adhesion coated board of claim 2, wherein the tackifier is a rosin resin.
4. 4. The high adhesion coated board of claim 2, wherein the film forming aid is dodecanol ester.
5. 5. The high-adhesion coated board according to claim 2, wherein the aqueous latex is a composite of styrene-acrylic emulsion and neoprene latex, and the mass ratio of the styrene-acrylic emulsion to the neoprene latex is 1 (0.5-1).
6. 6. The high-adhesion coated board according to claim 5, wherein the lithium silicate is used for modifying the aqueous latex in advance, and the method comprises the specific steps of mixing sodium methyl silicate, lithium silicate and water in advance, stirring uniformly to obtain a silicate solution, adding a silane coupling agent, mixing uniformly to obtain silicate sol, mixing the silicate sol with the aqueous latex uniformly, and stirring uniformly to complete the modification of the aqueous latex by the lithium silicate.
7. 7. The high adhesion coated board of claim 5, wherein the mass ratio of methyl sodium silicate, lithium silicate, silane coupling agent and water is (1-2) 6 (0.5-1) 15-20.
8. 8. A method for preparing a high adhesion coated board according to any one of claims 1 to 7, comprising the specific steps of: s1, uncoiling and preprocessing, namely uncoiling a steel coil and preprocessing, wherein the preprocessing comprises electrolytic degreasing and chemical degreasing to obtain preprocessed strip steel; s2, coating a primer on the surface of the pretreated strip steel, wherein the primer is one of an epoxy primer and a polyurethane primer; s3, coating a first adhesive layer, namely mixing water-based latex, a dispersing agent, a defoaming agent, a preservative, a tackifier, water and lithium silicate, and coating the mixture on the surface of the pretreated strip steel to form a first adhesive layer to obtain a primary finished product; S4, pre-curing the first adhesive layer, namely pre-curing the primary finished product through a first oven to obtain a gel-state semi-finished product, wherein the MEK of the gel-state semi-finished product is more than 1 and less than or equal to 25; S5, secondary coating pretreatment, namely rolling and packaging the gel-state semi-finished product, and then carrying out crosslinking treatment on the gel-state semi-finished product to obtain a crosslinked product; S6, coating a second adhesive layer on the surface of the crosslinked product to obtain a preform; and S7, curing the second adhesive layer, namely drying and curing the preform through a second oven to obtain the high-adhesion rubberized plate.
9. 9. The method for producing a high adhesion coated board according to claim 8, wherein in the step S4, the pre-curing temperature is 70 to 105 ℃ and the pre-curing time is 30 to 70S.
10. 10. The method for producing a high adhesion coated steel sheet according to claim 8, wherein in the step S1, the running speed of the strip steel is 65-100m/min.

Description

High-adhesion glue spreading plate and preparation method thereof Technical Field The application relates to the field of glue spreading plates, in particular to a high-adhesion glue spreading plate and a preparation method thereof. Background The color coated steel plate is one kind of anticorrosion, light and beautiful steel plate material, and is produced through surface treatment, degreasing, passivation, etc. of cold rolled steel plate or galvanized steel plate, coating paint and high temperature curing. The color coated steel plate has very wide application, and has been used in replacing spraying plate in building, indoor building, household appliance, etc. and has ever expanding application. With the continuous improvement of the requirements of the market on the material performance and the function, a coated steel plate (hereinafter referred to as a rubberized plate) which adopts an adhesive to replace the traditional paint appears. The glued board realizes the requirements of lamination, sealing or other functions through an extremely thin glue layer, usually 1-4 mu m, but in actual production and application, the process and the structural characteristics of the glued board also bring new technical challenges: The glue spreading plate adopts a discontinuous production mode. The term "discontinuous production" refers to a process flow that is divided into two distinct separate stages, a first stage of coating and curing of a first glue layer, subsequent winding, packaging and even transportation, and a second stage of crosslinking or other surface treatment, and further coating and curing of a second glue layer. The sectional production mode is essentially different from the continuous primer-curing-finishing-curing integrated process of the traditional color-coated plate. Because the first adhesive layer is always in a complete curing state after primary curing, the surface activity is reduced, and the coating of the second adhesive layer needs to be subjected to intermediate links such as rolling, transportation, storage and the like, obvious physical and time intervals exist between the two layers of adhesive. The interval causes that the two layers of glue are difficult to form sufficient chemical bonding and physical permeation, the interlayer adhesive force is obviously reduced, layering phenomenon is easy to occur in subsequent processing or use, and the integrity and the reliability of the whole structure are affected. Therefore, how to overcome the problem of the decrease of the interlayer adhesion in the discontinuous production has become a key problem to be broken through in the technical development of the glue spreading plate. Disclosure of Invention In order to solve the problem of the adhesive layer of the existing rubberized plate, the application provides a high-adhesion rubberized plate and a preparation method thereof. In a first aspect, the application provides a high-adhesion rubberized plate, which adopts the following technical scheme: The high-adhesion rubberized plate comprises a substrate, a first adhesive layer and a second adhesive layer, wherein the first adhesive layer comprises, by weight, 70-90 parts of aqueous latex, 0.5-1.5 parts of a dispersing agent, 0.5-1 part of a defoaming agent, 0.5-1 part of a preservative, 5-8 parts of a tackifier, 10-30 parts of water and 5-8 parts of lithium silicate. Through adopting above-mentioned technical scheme, adopt aqueous latex and lithium silicate to combine together, can take place chemical reaction with the base plate surface, form firm silicon-oxygen-metal bond, produce extremely strong chemical adhesion that surpasses physical adsorption far away, simultaneously, impel the first glue film structure that forms and second glue film can have better wetting power and cohesion, reduce the layering phenomenon of glue film. The lithium silicate can enhance the surface hardness and scratch resistance of the adhesive layer, effectively prevent the penetration of moisture and corrosive media, and improve the stability of the adhesive layer. The adhesion promoter and the aqueous latex are combined to improve the initial adhesion of the adhesive layer, enhance the wettability of the aqueous latex to the substrate, rapidly reduce the surface tension of the colloid, promote the colloid to spread on the surface of an adherend more easily, generate rapid holding power and improve the adhesive force between the adhesive layer and the substrate. In the first glue layer system, the water-based latex provides a flexible framework, lithium silicate is used as an inorganic reinforcing phase, and the water-based latex and the inorganic reinforcing phase are hybridized to form a composite glue film, so that the glue layer has high cohesive strength, heat resistance and durability. The first adhesive layer can form a high-binding-force link with the substrate through the chemical bonding action of lithium silicate, and an adhesion structure with