JP2001239630A - Laminated structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively reinforce a polyolefin layer having corrosion resistance by a fiber reinforced plastic layer. SOLUTION: The fiber reinforced plastic layer 5 is laminated on the polyolefin layer 1 through chlorinated polyolefin coating layers 2, 3 to reinforce the polyolefin layer 1 by the fiber reinforced plastic layer 5 without heating the same.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated structure useful as a material for, for example, a corrosion-resistant container or a corrosion-resistant pipe.

[0002]

2. Description of the Related Art Conventionally, there has been provided a corrosion-resistant container in which a polypropylene layer having corrosion resistance is provided on the inside and a glass fiber reinforced plastic layer is laminated on the outside in order to reinforce the polypropylene layer having poor mechanical strength. However, there is a problem that the polypropylene layer and the glass fiber reinforced stick layer have poor adhesion, and the delamination strength is not sufficient.

Therefore, for example, a method has been proposed in which the surface of a polypropylene layer is softened by heating with a flame, and then a fiber sheet is pressed thereon, and a glass fiber reinforced plastic layer is laminated on the fiber sheet (Japanese Patent Publication No. H5-5-). 10225
issue).

[0004]

In the above conventional method, the surface of the polypropylene layer is heated and softened by a flame.
There is a problem that the polypropylene layer shrinks during cooling and the molded shape of the polypropylene layer is not stable. Further, since a fiber sheet is required, material costs are increased.

[0005]

According to the present invention, a fiber reinforced plastic layer (5) is provided on a polyolefin layer (1) via a chlorinated polyolefin coating layer (2,3) as a means for solving the above-mentioned conventional problems. Are provided in a laminated structure. Preferably, the polyolefin layer (1) is a polypropylene layer, and the fiber reinforced plastic layer (5) is a glass fiber reinforced plastic layer.

[0006]

[Function] Since chlorinated polyolefin has an affinity for both polyolefin and fiber reinforced plastic, if it is interposed between the polyolefin layer and the fiber reinforced plastic layer, the delamination strength between the polyolefin layer and the fiber reinforced plastic layer will increase. Improve greatly.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to an embodiment shown in FIGS. 1 to 4. (1) is a layer of a polyolefin such as polypropylene or polyethylene, and the surface of the polyolefin layer (1) is formed of toluene. After wiping with a solvent such as the above, a chlorinated polyolefin first coating layer (2) is formed. The chlorinated polyolefin is, for example, chlorinated polypropylene, chlorinated polyethylene or the like, preferably having a chlorine content of 20.
~ 40% by weight.

The chlorinated polyolefin is dissolved in a solvent such as toluene, xylol, ethyl acetate, n-butyl acetate, methyl ethyl ketone, and methyl isobutyl ketone. The solid content of the chlorinated polyolefin solution is usually 20
-40% by weight, the viscosity is 15-40 poise (25 ° C.), and it is diluted to 3-7% by weight, desirably about 4-6% by weight at the time of application, and the polyolefin layer (1) is spray-coated, brush-coated or the like. ) Applied to the surface. The coating amount is usually ^{400g / m 2 ~500g / m 2} .

After the first chlorinated polyolefin coating layer (2) is formed, it is desirably left at room temperature to be dried as completely as possible. Next, the chlorinated polyolefin first coating layer
(2) The above-mentioned chlorinated polyolefin diluent is further applied thereon to form a chlorinated polyolefin second coating layer (3), and while the chlorinated polyolefin second coating layer (3) is in an undried fluid state. The fiber mat (4) is laminated thereon. The fiber mat (4) is made of inorganic fiber such as glass fiber, carbon fiber, ceramic fiber, metal fiber, whisker, polyamide fiber, polyester fiber, acrylic fiber, viscose fiber, acetate fiber, vinyl chloride fiber, vinylidene chloride fiber, etc. A web, a nonwoven fabric, a knitted fabric, or the like of one or more natural fibers such as synthetic fibers, cotton, hemp, and wool;
g / m ² ~450g / m ² of about one is used.

When the fiber mat (4) is laminated while the chlorinated polyolefin second coating layer (3) is in an undried fluid state, the chlorinated polyolefin second coating layer is applied to the fiber mat (4).
(3) penetrates. A similar fiber mat (4) is further laminated on the fiber mat (4), and a plastic precursor such as unsaturated polyester, styrene, diallyl phthalate or the like is applied and impregnated thereon. Examples of the plastic precursor include benzoyl peroxide, methyl ethyl ketone peroxide, cyclohexanone peroxide, t-butyl peroxide, t-butyl peroxybenzoate, t-butyl peroxy-2-ethyl hexanate, and t-butyl peroxypiperate. Polymerization catalysts such as valate, t-butyl peroxy neodecanoate, 3,5,5-trimethylhexanoyl peroxide, lauroyl peroxide and dicumyl peroxide, cumene hydroperoxide, t-butyl hydroperoxide, diisopropyl Polymerization accelerators such as benzene hydroperoxide, 2,2'-azobisisobutyronitrile, 2,2'-azobis-2-methylbutyronitrile, 2,2'-azobis-2,4-dimethylvalero Nitrile, 2,2'-azobis-2-cyclopropylpropionitrile, 2,2 ' -Azobis-4-methoxy-2,4-dimethylvaleronitrile, 1,1'-azobiscyclohexane-1-carbonitrile, 2-phenylazo-4-methoxy-2,4-dimethylvaleronitrile, 2,2'- An oil-soluble polymerization initiator such as an azo-based polymerization initiator such as azobis-N, N'-dimethyleneisobutyramidine is dissolved in an amount of several weight% or less.

After coating and impregnating the plastic precursor,
Further, a similar fiber mat (5A) is laminated thereon, and a plastic precursor is applied and impregnated thereon, and this operation is repeated a predetermined number of times, and a fiber reinforced plastic layer composed of a predetermined layer (5A, 5B, 5C) is formed. Form (5).

In the above embodiment, the first fiber mat (4) is impregnated with the chlorinated polyolefin second coating layer (3), and the chlorinated polyolefin first coating layer (2) is further impregnated with the chlorinated polyolefin second coating layer. Swelling or dissolving with the solvent of the layer (3) and integrating with the chlorinated polyolefin second coating layer (3), a fiber reinforced plastic layer (5) is formed on the fiber mat (4) in such a state. Therefore, the adhesion between the polyolefin layer (1) and the fiber-reinforced plastic layer (5) is greatly improved, and a high delamination strength is obtained.

[0013]

According to the present invention, no heating is required when applying a chlorinated polyolefin to improve the adhesion between the polyolefin layer and the fiber-reinforced plastic layer for reinforcing the polyolefin layer. The molded shape is stably maintained, and can be combined with high accuracy, for example, when combining molded products. The laminated structure of the present invention has good chemical resistance because the polyolefin layer is disposed on the inner side, and the fiber-reinforced plastic layer for reinforcing the polyolefin layer is firmly adhered to the polyolefin layer. , A thin polyolefin layer can be used, and materials can be saved and weight can be reduced. The laminated structure of the present invention is, for example, a food processing tank,
It is applied to the abatement towers such as cooling towers and exhaust gas treatment towers, or to repair these tanks and towers on site.

[Brief description of the drawings]

 1 to 4 show one embodiment of the present invention.

FIG. 1 is a side sectional view showing a state where a chlorinated polyolefin first coating layer (2) is formed on a polyolefin layer (1).

FIG. 2 is a side sectional view showing a state where a second chlorinated polyolefin coating layer (3) is further formed on the chlorinated polyolefin first coating layer (2).

FIG. 3 is a side sectional view showing a state in which a fiber mat (4) is further laminated thereon.

FIG. 4 is a side sectional view of the obtained laminated structure.

[Explanation of symbols]

 1 Polyolefin layer 2 Chlorinated polyolefin first coating layer 3 Chlorinated polyolefin second coating layer 4 Fiber mat 5 Fiber reinforced plastic layer

Claims (2)

[Claims] 1. A laminated structure wherein a fiber reinforced plastic layer is laminated on a polyolefin layer via a chlorinated polyolefin coating layer. 2. The laminated structure according to claim 1, wherein said polyolefin layer is a polypropylene layer, and said fiber reinforced plastic layer is a glass fiber reinforced plastic layer.