JPS58171949A - Vinyl chloride coated steel plate using aluminum zinc alloy plated steel plate as substrate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rounded vinyl-coated steel sheet using an aluminum-zinc alloy plated steel sheet as a substrate.

Conventionally, aluminum-zinc alloy coated steel sheets in which an aluminum-zinc alloy plating layer is formed on a steel sheet (1) have been manufactured by the zinc-aluminum coated products disclosed in Japanese Patent Publication No. 46-7161 and the Kla Nine corrosion-resistant aluminum-zinc coatings and their manufacturing method,
As is known from ε, a treatment method for iron stracid by hot-dip coating disclosed in Japanese Patent Publication No. 54-8335, it is known that the corrosion resistance is more than twice as high as that of galvanized iron sheets. On the other hand, vinyl chloride resin coatings are extremely resistant to corrosion, such as those applied to steel plates or galvanized iron plates, but they are highly resistant to UV rays and heat from the sun, as well as from rain water and dust.
It is said that deterioration is accelerated. Therefore, in order to improve this drawback, coatings on exterior PVC steel sheets used for roofs and walls of building pots, etc. are coated with dibasic phosphite lII, organotin, and valium to prevent heat and ultraviolet deterioration. Stabilizers such as zinc-based and organic phosphite-based stabilizers, extender pigments such as Titashi White (TiO), and coloring pigments are added to vinyl chloride resin paste and diisodecyl phthalate (DID).
p) Mixed with a phthalic acid-based possifier such as S9 octal phthalate (DOP)) m! It is coated with + and baked. On the other hand, aluminum and aluminum-zinc alloy coated steel sheets have excellent corrosion resistance and are used as exterior building materials. If you use a vinyl chloride coated plate with a vinyl resin layer (7) formed on it, sunlight will pass through the vinyl chloride resin layer (7) more heavily than the incident and reflected sunlight, which will accelerate deterioration and the aluminum and vinyl chloride coating. This type of coated metal sheet was not commercialized due to problems such as peeling from the adhesive layer surface due to insufficient cohesive force of the adhesive interface layer due to the difference in thermal expansion of In the case of aluminum, aluminum has a strong influence and reflects infrared and ultraviolet rays, so aluminum-zinc alloy-plated steel sheets are not suitable as substrates for PVC resin-coated steel sheets. A tin alloy plated steel plate) has been used as the substrate.

The present invention has been devised in view of the above points, and is a highly durable aluminium-zinc alloy plated steel plate as a substrate, and a polyvinyl chloride (mM) plated steel plate having excellent weather and corrosion resistance.
K provides a vinyl chloride-coated steel sheet using an aluminum-zinc alloy coated steel sheet as a substrate that can maintain durability for over 20 years.

In the present invention, an aluminum-zinc alloy plating layer is formed on a steel plate, a chemical conversion treatment is applied to the aluminum-zinc alloy plating layer, and a glass fiber #!
Alternatively, it is a vinyl chloride coated steel sheet using an aluminum zinc alloy plated steel sheet as a substrate, which is characterized by forming a vinyl chloride resin coating layer mixed with inorganic fibers such as carbon fibers and aluminum powder or aluminum foil pieces. The present invention will be specifically explained in detail below. In the figure, il+ is a steel plate, and this steel plate (1) K has an aluminum-zinc alloy plating layer (2) formed thereon, and is a so-called aluminum-zinc alloy plated steel plate. The aluminum-zinc alloy plating layer (2) of this aluminum-zinc alloy-plated steel sheet is treated with a chromic acid-based chemical conversion treatment agent to form a chemical conversion treatment layer (3), and the calcium chromate layer (3) is formed on top of the aluminum-zinc alloy plating layer (2). and chromic acid salt 0.
An adhesive layer (4) is formed by applying and baking an acrylic, epoxy, or acrylic parphenol adhesive containing rust-preventing pigments such as 7thium alone or in a mixture. ) on top diameter 5~22μ, length 10~500
Glass fiber treated with silane coupling agent fi)
and #; Particle size 1 to 13 treated with stearic acid pretanate
0μ aluminum powder or #-i5μ or less aluminum foil strips (6) mixed in a range of 3 to 40%, respectively, and painted with the above-mentioned various stabilizers, color-retaining pigments, plasticizers, and lithium paint mixed with vinyl resin. A baked coating (7) is formed. This coating film may be embossed while heated with a predetermined zero-roll, or it may be formed into a sheet-like coating film by rotating the coating roll. On the surface of this 9mH transparent or colored ultraviolet blocking methyl methacrylate resin lθ~100μ thick film (8
) may be heat fused. Here, the aluminum-zinc alloy plating layer is, for example, [A/ 55% by weight, Zn 43-4
The alloy layer has a St content of 1.6% by weight, but the composition is not necessarily limited thereto.

In the present invention, the vinyl chloride resin coating layer is mixed with aluminum powder or aluminum foil pieces and glass fibers, so ultraviolet rays and infrared rays that try to penetrate from the surface of the vinyl chloride resin coating layer are absorbed by the aluminum. As shown by the arrows in Figure 2, the powder and aluminum foil strips are reflected off the surface of the vinyl chloride resin coating layer and do not penetrate further into the interior, resulting in the aluminum-zinc alloy plating layer formed on the steel plate. Ultraviolet rays and infrared rays do not reach the area. Therefore, the temperature of the coating film is prevented from increasing, and the deterioration of the vinyl chloride resin due to heat does not proceed.Also, ultraviolet rays pass through the vinyl chloride resin coating layer and accelerate the deterioration, and furthermore, after passing through the vinyl chloride resin coating layer, There is no fear that ultraviolet rays will be reflected by the aluminum-zinc alloy plating layer and deteriorate the vinyl chloride resin coating layer again during eating. Next, the fibers mixed in the vinyl chloride resin coating layer can prevent the coating from cracking or peeling from the adhesive layer due to expansion and contraction of the vinyl chloride resin coating layer due to solar heat and temperature. Good results have been obtained due to increased strength and wear resistance. Furthermore, this coating film has a water permeability of 20~
30% lower Ic<<
The plating layer of the board is more durable, the performance is more than twice that of galvanized iron sheets, the durability of the coating film is improved, and the overall durability including the board is more than 20 years, which is different from conventional products. It becomes a product that can be maintained.

Next, examples of the present invention will be described.

〔Example〕

55% aluminum zinc alloy plated steel plate with plate thickness 0-5m1m (plating area 150 FHD plating thickness 20μ on one side)
) Nippon Bar Co., Ltd.'s glue 0m acid-based chemical conversion treatment liquid Bondesilite 1310 is applied to the aluminum zinc alloy plating layer of
treated with 10% of acrylic phenolic adhesive on top of it.
0 parts by weight of rust preventive pigments, 0 tons of acid, 20
Mix 10 parts by weight of calcium chromate with 9 parts by weight, apply 9 f/nf and bake at 200°C, and then apply glass fiber (diameter 13μ, length 100μ, the rate of mixing into the paint is 100% by weight of the paint). 15 parts by weight) and aluminum powder (with a particle size of 5 microns) in the paint at a mixing rate of 100 parts by weight.
A vinyl chloride paint mixed with 20 parts by weight) was applied and baked at 250 f/- to give a film thickness of 200 μm, thereby forming a chloride-coated steel plate using an aluminum-zinc alloy plated steel plate as a substrate.

[Comparative example]

Galvanized iron plate with a thickness of 0.5m/m (zinc area 305y/nf
The plating (thickness 20μ on one side) was treated with a zinc phosphate chemical conversion treatment solution, an acrylic phenol adhesive was applied and baked on top of that, and a standard exterior vinyl chloride paint was applied and baked to a film thickness of 200μ to create a comparative example. I got something.

The performances of the examples of the present invention and the comparative examples are shown in Table 1 below.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing the reflection of ultraviolet rays and infrared rays on the vinyl chloride resin mm layer when a vinyl chloride m film layer is formed on an aluminum galvanized steel sheet, and Figure 2 is the reflection of ultraviolet rays and infrared rays in the present invention. Explanatory diagram showing the situation, 11N3
The figure is an explanatory diagram of another embodiment of the present invention, in which (1) is a steel plate, (2) is an aluminum zinc alloy plating layer, (S) is a chemical conversion treatment layer, (4) is an adhesive layer, and tal is a glass fiber,
(@) is aluminum powder, and (7) is a vinyl chloride resin layer. Agent Patent Attorney Ishi 1) Choshichi

Claims (1)

[Claims] +1+ An aluminum-zinc alloy plating layer is formed on a steel plate, a chemical conversion treatment is performed on the aluminum-zinc alloy plating layer, and inorganic fibers such as F15 fibers or longitudinal fibers are placed on top of this through an adhesive layer containing a rust-preventing pigment. A rounded vinyl-coated steel sheet using an aluminum-zinc alloy plated steel sheet as a substrate, characterized in that aluminum powder is mixed with aluminum foil pieces to form a rounded vinyl resin coating layer.