JPH11152941A - Woody pattern plastic fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contrive improvement of weatherability and durability and lightweight by making a support and a furring strip hollow and forming the three layers of a wood grain pattern layer and a transparent resin layer on a resin base material layer in each side wall in a plastic fence attaching the support on right and left both the ends of a panel and the furring strip on the upper and lower ends. SOLUTION: A wood pattern fence 1 is constituted of each member of at least a panel 2, a support 3 and a furring strip 4, and their members are hollow. The side wall of each member forms a wood pattern layer comprising a foamed resin on a resin base material layer and a transparent resin layer as a surface material. A rectangular column, a circular column, a triangular column, a polygonal column or the like may be employed for the shape of the support 3, a leg part 9 is provided on the lower end of the support 3 to make an installation type or the lower end of the support 3 may be directly buried in the ground, and may be used to be executed on a block wall. Preferably resin for the base material layer of each member is hard synthetic plastic. Thus, improvement of weatherability and durability and lightweight can be contrived.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wood-like plastic fence having a natural woody tone that can be used for decoration, partitioning, partitioning, enclosing, events and the like indoors or outdoors (hereinafter simply referred to as a wood-like fence).

[0002]

2. Description of the Related Art Conventionally, wood-like fences are made of a metal fence made of steel, aluminum, stainless steel, or the like, on which a wood-like paint is applied or a wood-like sheet is adhered. It is known to mix wood flour to give a woody feel. In addition, those using natural wood are also known.

[0003]

In the above-mentioned conventional wooden fence made of metal, the surface coating is peeled off due to abrasion or scratches on the surface, or the sheet on the surface is damaged, and the metal base layer is exposed. Rust is generated in places, making it unsightly. When used outdoors, wood mixed with wood flour produces a woody material that absorbs moisture and reduces its strength, and when exposed to ultraviolet light, it fades and changes color tone, Was bad. In addition, wooden fence using natural wood,
Due to the high water absorption, poor weather resistance and easy corrosion
There was a problem with durability. In addition, since the connection between the woods was performed using metal nails, screws, adhesives, or the like, corrosion of the metal parts and peeling of the bonded parts were observed.
In addition, wooden fences constructed from real wood were heavy and inconvenient to carry.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a lightweight wood-like fence excellent in weather resistance and durability.

[0005]

Means for Solving the Problems The inventor of the present invention has conducted trial production and studies to solve the above-mentioned problems, and as a result, formed a resin substrate layer having a hollow structure, and formed a wood-like resin layer of a foamed resin thereon. Completed the present invention by providing a wood grain pattern layer to reduce the weight, and further developing a good woody fence with weather resistance, durability and strength by providing a surface layer made of a transparent resin layer on the wood grain pattern layer It led to.

The woody fence of the present invention is a plastic fence in which a panel is provided on both left and right ends of a panel, and a body edge is attached to upper and lower ends. The panel, the pillar and the body edge are hollow, and each side wall is made of a resin base. At least three layers formed of a wood pattern layer made of a foamed resin and a transparent resin layer in this order on the material layer.
Consists of layers.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; FIG. 1 is a perspective view showing a woody fence of the present invention, and FIG. 2 is a cross-sectional view of members constituting the woody fence of the present invention, taking a pillar as an example.
FIG. 4 is a partially enlarged perspective view cut along an arrow AA plane perpendicular to the length direction. The woody fence 1 of the present invention is composed of at least each of a panel 2, a column 3, and a body edge 4. Each of these members has a hollow structure, and the side wall of each member is formed on a resin base material layer (hereinafter, simply referred to as a base material layer) 5.
A grain pattern layer 7 made of a foamed resin and having a grain pattern 6 and a transparent resin layer 8 as a surface material are formed.

The pillar 3 has a square pillar shown in FIG. 2, a circular pillar, a triangular pillar, a polygonal pillar, or the like.
Can be appropriately selected and used according to the design. Further, as shown in FIG. 1, the woody fence 1 of the present invention is provided with a hollow leg 9 at the lower end of the support 3 to make the woody fence 1 a stationary type, or the lower end of the support 3 is grounded. May be directly buried in the wall, or the lower end portion of the column 3 may be constructed on a block wall, or may be fixed with a wooden fence block or the like.

As the resin for the base material layer of each member constituting the woody fence, hard and rigid plastics are particularly preferable, such as polyvinyl chloride resin, polystyrene resin, ABS resin, and acrylic resin. Is exemplified. In addition, a modifier,
Additives such as stabilizers, pigments, fillers, and lubricants are added as needed. It is preferable to select a color close to the color of the resin of the wood pattern layer.

As the resin for the grain pattern layer, the above-mentioned thermoplastic resins are used, and any of the same or different resins can be used as long as they are compatible with the resin for the base material layer. The resin for the wood grain pattern layer is mixed with the pellets as the seed material for the wood grain pattern with the pellets as the ground material,
It is prepared by heating and kneading. The base material pellets are prepared by adding a foaming agent to a selected resin and foaming it with low foaming. As foaming agents, for example, azobisformamide (AZC),
Examples thereof include sodium bicarbonate, ammonium carbonate, and the like, to which an auxiliary resin component, a stabilizer, a lubricant, a pigment, and the like are appropriately added. The amount of the foaming agent is 0.2 to 3.0
% By weight, low foaming and density of 0.4-0.9 g /
range cm ^3, preferably to a density in the range of 0.6 ~0.9 g / cm ^3. If the density is less than 0.4 g / cm ³ , the strength will be weak,
On the other hand, if it exceeds 0.9 g / cm ³ , the wooden texture is unfavorably deteriorated.

In order to obtain a woody feeling closer to that of natural wood, wood powder may be mixed with the resin for the grain pattern layer. In the woody fence of the present invention, since the transparent resin layer is formed on the wood grain pattern layer, the weather resistance does not deteriorate due to the absorption of moisture by the wood flour.

[0012] Seed pellets with a wood grain pattern are mixed with several kinds of pellets of a darker or lighter color than the resin for the base material to form a seed material, and this is mixed with the resin for the base material by about 1 to 10%. A resin for the wood pattern layer is prepared. It is preferable that the mixing amount of the seed material is determined by actually performing molding and checking the pattern. It is desirable that the degree of polymerization of the seed resin is higher than the degree of polymerization of the base material resin. This is because, when the degree of polymerization of the resin of the seed material forming the grain pattern is smaller than the degree of polymerization of the resin for the base material, when kneading to form the wood pattern, the color of the base material is assimilated to a single color. May not be able to add a grain pattern.

Examples of the resin as the transparent resin layer include transparent resins such as a polyvinyl chloride resin and an acrylic resin, and those having good adhesion to the grain pattern layer are preferable. The transparent resin layer is formed by co-extrusion or coating on the wood pattern layer. Depending on the type of resin of the grain pattern layer, an ultraviolet absorber such as benzoate ester, benzophenone type, benzotriazole type or acrylonitrile type may be used in an amount of 0.1 to 1.0 wt. It is more preferable to mix in the range of parts.

When the transparent resin layer is formed by coating, it can be formed by roll coating, dip coating, or the like. Examples of the material include transparent resins of acrylic, urethane, fluorine, and silicone resins. However, as in the case of the co-extrusion molding, it is preferable to use one having good adhesion to the grain pattern layer. In addition, depending on the resin of the grain pattern layer, it is preferable to add the same UV absorber as in the case of co-extrusion at the same mixing ratio in order to improve the weather resistance of the transparent resin layer.

The glossiness of the transparent resin layer is important for bringing the woody fence closer to the natural woody one. By adjusting the surface glossiness within the range of 5 to 50%, preferably 10 to 40%. It is closer to the wood texture of natural wood. Outside this range, the texture of the surface of the natural wood cannot be obtained, giving a sense of incongruity. In addition, the measurement of the surface glossiness is performed by using a measuring device:
Using GMX-202 (Murakami Color Research Laboratory, product name)
The measurement was performed at a standard light irradiation angle of 60 degrees based on the specular gloss measurement method (JIS Z8748).

As a method of adjusting the specular gloss of the surface of the transparent resin layer, a matting material can be blended into the transparent resin material. Matting materials include silica, calcium carbonate, glass beads, organic polyethylene and the like,
The particle size and blending amount are arbitrarily set so as to obtain a target specular glossiness. In particular, the particle size is 0.001 to 25.
More preferably, it is in the range of 0 μm and the amount is in the range of 3 to 20 parts by weight based on 100 parts by weight of the transparent resin.

Although the strength of the side wall of the member constituting the woody fence depends on the type of the constituent resin, the Izod impact value and the flexural modulus have a strength equivalent to that of a hard resin. For example, when formed of a vinyl chloride resin, the Izod impact value was 3.6 kgf · cm / cm 2 and the flexural modulus was 200 kgf / mm ² or more, and the strength of the base material layer was maintained. In addition,
The measurement of the Izod impact value is based on the Izod impact test method JIS K7110 for hard plastics. The flexural modulus is measured according to the plastic bending property test method JIS K7171.

To manufacture the woody fence of the present invention,
First, a base material layer is formed using a usual extruder, and the grain pattern layer is formed by co-extrusion with the base material layer. The transparent resin layer is formed by coextrusion with the base material layer and the grain pattern layer, or by coating. At this time, the kneading degree of the resin for the base layer is increased by using a twin-screw extruder, depending on the resin used, so that the resin has strength. The resin pellets for the woodgrain pattern layer to be co-extruded are mixed together with a single-screw extruder, because if the degree of kneading is increased, the pellets of the ground material and the pellets of the seed material are mixed too well to be monochromatic. It is preferable to make the degree of polymerization of the resin of the material larger than the degree of polymerization of the resin of the base material so as to make it difficult to mix.

Each resin is co-extruded under ordinary extrusion conditions to form a hollow woody panel, column, rim, and the like. Each member taken out of the mold after molding is quickly cooled and sized by vacuum sizing or the like, and then is taken out by a caterpillar take-off machine or the like, and cut into a certain size to produce panels, columns, and rims. . Each member such as a panel, a column, a rim, and the like manufactured in this manner are thereafter
Secondary processing is performed in which holes for inserting the body edge are provided on the columns, and holes for inserting the panel are provided on the body edge, and assembled as shown in FIG. In addition, as shown in FIG. 1, a leg may be provided at the lower end of the support to be a stationary type, a part of the support may be embedded and fixed, or the support may be constructed on a block wall. In addition, it can be fixed and used with a fence block or the like.

As described above, the woody fence of the present invention has an excellent wood grain pattern and a woody feel, each member is hollow, and each layer constituting the side wall is formed of a plastic material.
Lightweight and convenient to carry. Moreover, since the surface layer is formed of a transparent resin layer, it has excellent weather resistance and durability, and the weather resistance and durability can be further increased by appropriately selecting the type of transparent resin to be used and the thickness of the layer. . Furthermore, it is easy to process and does not require metal nails, screws or adhesives for assembly.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The woody fence of the present invention will be described in more detail based on embodiments. First, a resin for the base material layer was prepared by adding 100 parts by weight of a polyvinyl chloride resin having a polymerization degree of 1000, 5 parts by weight of an impact modifier, and further adding a stabilizer, a filler, a lubricant, a pigment, and the like. Resin pellets were used.

The resin for the base material of the grain pattern layer includes a polymerization degree
Base material pellets prepared by adding 80 parts by weight of 800 polyvinyl chloride resin, 10 parts by weight of an auxiliary resin component (acrylic resin), 0.4 parts by weight of a foaming agent, and further adding a stabilizer, a lubricant, a pigment, and the like. As seed materials for imparting a wood grain pattern to the wood grain pattern layer, two kinds of seed material pellets having a higher degree of polymerization than that of the base material resin and having a darker color than the ground material were prepared. The resin as the wood grain pattern layer is obtained by adding about 3% by weight of this seed material pellet to the previously prepared ground material pellet and kneading with heating. At this time, the density of the grain pattern layer was 0.75 g / cm ³ . The resin for the transparent resin layer was a pellet composed of 93 parts by weight of a transparent acrylic resin, 0.8 parts by weight of wax, 6 parts by weight of silica, and 0.2 parts by weight of an ultraviolet absorber.

In the production of each member constituting the woody fence of the present invention, first, the pellets for the base material layer are supplied to a biaxial extruder of different directions, and the base material pellets of the grain pattern layer are supplied to the uniaxial extruder. And 3% by weight of seed material pellets,
The pellets for the transparent resin layer are supplied to the shaft extruder and co-extruded into a mold cavity having a predetermined shape, and the inside is hollow,
A support, a rim, a panel, and the like formed of a base material layer, a grain pattern layer, and a transparent resin layer were formed in order from the hollow side wall. Then, immediately after cooling and sizing by vacuum sizing or the like, it was taken out by a caterpillar take-off machine or the like and cut into a predetermined size.

The side wall strength of this molded product is such that the Izod impact value is 15 to 20 kgf · cm / cm, and the flexural modulus is 260 to 300 kgf / mm ^2.
And had extremely high strength. The surface glossiness of the molded product was 20%, which was very close to the actual wood texture. Next, the molded panel, strut, and body edge members
Assembling by drilling using NC router, Fig. 1
A wood-like fence with high weather resistance having a woody tone and a woody feeling like this was produced.

[0025]

The woody fence of the present invention has a wood grain pattern,
The glossiness can be freely adjusted to give a good woody pattern and wood texture, and it is lightweight and convenient to carry. further,
High weather resistance was obtained by the transparent resin layer provided on the surface layer, and a woody feeling closer to that of natural wood was obtained by using the pellets as the base material and the seed material for the grain pattern layer.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a woody fence of the present invention.

FIG. 2 is a partially enlarged perspective view of a pillar constituting the woody fence of the present invention, which is cut along an arrow AA plane perpendicularly to the length direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Wood-like fence 2 ... Panel 3 ... Strut 4 ... Trunk edge 5 ... Base material layer 6 ... Wood grain pattern 7 ... Wood grain pattern layer 8 ... Transparent resin layer 9 ... Leg part

Claims (1)

[Claims] 1. A plastic fence having columns at both left and right ends and columns at its upper and lower ends, wherein said panel, columns and trunk are hollow, and each side wall is foamed sequentially on a resin base material layer. A wood-like plastic fence comprising at least three layers formed of a wood grain pattern layer made of resin and a transparent resin layer.