KR100641687B1 - Multilayer board for sports installation and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a plate for sports facilities and a method for manufacturing the same, and the plate for sports facilities according to the present invention is made of polypropylene and an intermediate layer formed by selecting any one of wood flour or rice husk powder in a predetermined amount, and polypropylene. The surface layer fused on both sides of the intermediate layer, the plate for sports facilities according to the present invention and the method of manufacturing the same when used in fences, such as skateboards and flooring, hockey field, ice sheet case, etc. Impact resistance, shrinkage resistance, and bending workability is superior to plastic sheeting, so it is effective to have safety, competition performance and appearance suitable for use in various sports facilities.

Description

Multilayer board for sports facilities and manufacturing method thereof

1 is a perspective view showing a half pipe which is one of the ramps of the skate park made of a multilayer board material for sports facilities according to the present invention.

Figure 2 is a cross-sectional view showing a multi-layer board for sports facilities according to the present invention.

3 is a process chart showing a method of manufacturing a multilayer board for sports facilities according to the present invention.

** Description of the symbols for the main parts of the drawings **

100 ... half pipe

110 ... support frame

120 ... panel

The present invention relates to a multilayer board for sports facilities and a method of manufacturing the same, and more particularly, to a multilayer board that can be used in fences and the like, such as things in the skate park and floors, hockey field, ice sheet case and the like and a method of manufacturing the same.

So-called inline skating was born in Europe in the middle of the 18th century. It was popularized in 1985. In-line skating at this time was enough to stimulate the curiosity of many people with cutting-edge materials and mass production, and it could be enjoyed wherever people could actually walk, and it would be a great help to strengthen basic physical strength. I was able to get the spotlight.

In the United States, where the country is currently dominating, students are using classroom transfers or short-distance transportation. Young women are also enjoying in-line aerobics. In-line skate associations were established in the United States in 1991, and have already been a pilot at the Olympics.

As the research of inline skating has increased rapidly in Korea, more and more people are trying to enjoy it in depth, and now local governments can skate on skateboards and BMX (stunt bikes) together with inline skating to make it safer and more professional. Park and inline skating hockey are competitively created.

As the plate used in the composition of such a skate park, conventionally, a plywood or a plastic to which plastic or reinforcing agent used for industrial building materials is added is used.

However, in the case of plywood, the surface is easily damaged by repeated impact, friction, and moisture, which hinders the performance of performance and causes injury to the user.

And in case of plastic, it is manufactured without considering economic performance or appearance on the surface of the plate when manufacturing for reasons of physical properties or economics of industrial materials. Therefore, harmful materials such as glass fibers are exposed to the surface to protect the user's body. In addition, there is a disadvantage in that it is also necessary to solve the problems caused by long-term exposure in the outdoors, and appropriate flexibility for the construction, but without considering this point, the coefficient of linear expansion or the material that cannot absorb the expansion state by itself when fixed When used, the deformation occurs easily according to the temperature change, and there is a problem of damaging the framework and the fixing mechanism of the facility by the force at the time of expansion and contraction.

The present invention is to solve the above-mentioned problems, the object of the present invention is used in fences, such as skateboards and floors of the skate park, hockey field, ice sheet, etc. is formed in a triple structure impact resistance, shrinkage resistance, bending While providing processability, the outer layer is intended to provide a sports facility plate and a method of manufacturing the same having excellent safety, competitive performance appearance, and the like for sports facilities.

Method for producing a plate for sports facilities according to the present invention for achieving the above object is an intermediate layer formed by selecting any one of the wood flour or chaff meal with polypropylene in a predetermined amount; It is made of polypropylene and has a surface layer fused to both sides of the intermediate layer.

And preferably, the intermediate layer includes glass fibers, CaO, adhesive resin, may be further included by selecting any one of paraffin and wax.

Also preferably the intermediate layer is 50 to 60 parts by weight of the polypropylene, 15 to 32 parts by weight of the wood flour or chaff powder, 10 to 13 parts by weight of the glass fiber, 3 to 5 parts by weight of the CaO 3, the adhesive resin 3 to 5 By weight, 2-3 parts by weight of the paraffin or wax.

And preferably, the surface layer includes an inorganic material and an additive. The additive consists of a UV stabilizer and a pigment, and thus the surface layer is 40 to 80 parts by weight of the polypropylene, 20 to 60 parts by weight of the inorganic material, 2 to 3 parts by weight of the pigment, and 2.5 to 3.5 parts of the UV stabilizer. (2500-3500 PPM).

Method for producing a plate for sports facilities according to the present invention for achieving the above object is an intermediate layer compounding step of selecting any one of polypropylene and wood flour or chaff powder in a predetermined amount; A surface layer compounding step of separately compounding a surface layer of polypropylene; An extrusion step of separately extruding the surface layer composition and the intermediate layer composition which have undergone the surface layer compounding step and the intermediate layer compounding step, through a die, into a three-layered plate; It consists of a molding step of molding while passing through the roller up and down of the plate member of the three-layer structure that passed through the extrusion step.

Preferably, the intermediate layer composition to be blended in the intermediate layer blending step includes glass fibers, CaO, adhesive resin, and further preferably the intermediate layer composition is 50 to 60 parts by weight of the polypropylene, 15 to 32 parts by weight of the wood flour or chaff powder 10 to 13 parts by weight of the glass fiber, 3 to 5 parts by weight of CaO, 3 to 5 parts by weight of the adhesive resin, and 2 to 3 parts by weight of the paraffin or wax.

In the surface layer compounding step, the surface layer composition includes an inorganic material and an additive, and the additive includes a UV stabilizer and a pigment.

The surface layer composition is composed of 40 to 80 parts by weight of the polypropylene, 20 to 60 parts by weight of the inorganic material, 2-3 parts by weight of the pigment, 2.5 to 3.5 parts by weight of the UV stabilizer (2500 to 3500PPM).

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the drawings.

The plate for sports facilities according to the present invention is used for fences and the like of the skate park and the floor, hockey field, ice sheet, etc. As an example of the use, the half pipe 100 is one of the skate parks as shown in FIG. 1. ) The structure of the half pipe 100 is composed of a plurality of support frames 110 and the plate member 120 of the present invention bent to the upper side of the support frame 110.

The configuration of the plate for sports facilities 120 of the present invention is made of a three-layer structure as shown in FIG. Looking at the configuration, the intermediate layer 121 formed by selecting any one of wood flour or chaff powder together with polypropylene and blending it in a predetermined amount, and the upper and lower surfaces of the intermediate layer 121 is made of polypropylene, so that both surfaces of the intermediate layer 121 It is a surface layer 122 fused to it. By adding various additives and materials here, a greater material effect can be exerted.

In more detail, the basic composition of the intermediate layer 121 and the surface layer 122 is composed of polypropylene. Alternatively, polyolefin resins may be used. However, in the present invention, polypropylene resin having a relatively low coefficient of linear expansion is used in the present invention due to the characteristics of the use of the plate which shrinks and expands due to severe temperature difference outdoors. It is appropriate to use block PP for extrusion for proper flexibility.

And the wood flour or chaff powder constituting the intermediate layer 121 has a good workability, such as wood in cutting, nailing in addition to the cost saving effect by the reduction of specific gravity. In addition, when the use ratio is increased, the linear expansion coefficient is reduced by 30 to 40 parts more than the polypropylene alone, thereby reducing the contraction and expansion force of the fixed plate. However, if it is added in excess of 40 parts, there is a disadvantage in that the flowability during extrusion and the workability decrease due to volatile components, and also impact, tensile strength is lowered.

Therefore, in order to solve the problem of increasing the content and to secure a more improved plate, it is preferable to include the glass fiber, CaO, adhesive resin separately in the intermediate layer.

Glass fiber improves impact strength, flexural modulus, and tensile strength, and reduces the coefficient of linear expansion by 1/3 by using wood fiber or rice husks than glass fiber alone. There is. However, glass powders are harmful in their work. Therefore, it is preferable to use in the form of pellets compounded with the polypropylene resin.

And CaO ameliorates problems caused by moisture in wood flour or chaff. In other words, the moisture contained in wood flour or rice husk may cause problems such as bubbles, surface defects and warping in the plate.By using CaO, moisture contained in wood flour or chaff powder can be easily removed. No work or process for removal is necessary, and the problem of reabsorbing moisture in the air after drying can be solved.

Next, the adhesive resin is intended to increase physical properties. The component of the adhesive resin is a modified propylene obtained by graft polymerization of maleic anhydride, which is a hydrophilic functional group, to a polypropylene resin to increase the interfacial adhesion between the reinforcing agent and the resin to increase physical properties. Let's do it.

In addition to these, additives may be included in the intermediate layer 121. The additives optionally include paraffin or wax, which serve to further improve the uniformity of the mixing of wood flour or chaff powder in the compounding and extrusion process. That is, when a small amount of paraffin or wax is added, the fluidity is increased, so that the compounding and extrusion process is more easily performed, and the content of wood flour or chaff powder can be easily increased.

When all the additives were included, the weight ratio of the intermediate layer 121 was 50 to 60 parts by weight of polypropylene, 15 to 32 parts by weight of wood flour or chaff, 10 to 13 parts by weight of glass fiber, 3 to 5 parts by weight of CaO, and adhesive resin. Most preferably, it is composed of 3-5 parts by weight, 2-3 parts by weight of paraffin or wax.

The surface layer 122 is made of a material that is fused back and forth to the surface of the intermediate layer 121 by coextrusion to provide durability and surface performance, appearance and stability as a sports facility. In addition, it is easy to process the surface layer 122 using the same polypropylene as the intermediate layer for fusion with the intermediate layer 121, and other additives may be included. The additive of the surface layer 122 includes an inorganic material and other additives.

The inorganic material is composed of inorganic fillers such as talc, and mixing them reduces the surface gloss, which causes glare to be suitable for sports facilities, increases the surface frictional force, and reduces the coefficient of linear expansion of polypropylene. And glass fibers can be used separately to supplement the properties, but UV stabilizers can be used so that the glass fibers are not emitted to the surface by oxidation by ultraviolet rays. At this time, UV stabilizers may be used in combination with 1 to 2 parts by weight based on the weight of the glass fiber.

Subsequently other UV additives and pigments may be used. UV stabilizers are used to prevent oxidation and discoloration of the outer surface when the plate is exposed outdoors for more than two years, and the pigment is added in an appropriate amount to produce a color of the plate suitable for the purpose.

The surface layer containing such an additive is preferably composed of 40 to 80 parts by weight of polypropylene, 20 to 60 parts by weight of inorganic material, 2-3 parts by weight of pigment, and 2.5 to 3.5 parts by weight (2500 to 3500 PPM) of UV stabilizer.

Hereinafter, a method for manufacturing a plate for a sports facility according to the present invention configured as described above will be described.

Method for producing a plate for sports facilities according to the present invention, as shown in Figure 3, the intermediate layer compounding step (S10) of selecting any one of polypropylene and wood flour or chaff powder in a predetermined amount and a surface layer of polypropylene The surface layer compounding step (S20) to be separately blended, the surface layer composition and the intermediate layer compounding step after the intermediate layer compounding step and separately extruded step (S30) and extruding the extrusion into a three-layer plate through a die It consists of a molding step (S40) for molding while passing through the roller upper and lower of the three-layer structure.

Each step will be described below.

Intermediate layer compounding step (S10) may include glass fibers, CaO, adhesive resin as described in the above-described configuration in addition to polypropylene and wood flour or chaff powder, the content ratio thereof is 50 to 60 parts by weight of polypropylene, wood flour or 15 to 32 parts by weight of chaff, 10 to 13 parts by weight of glass fiber, 3 to 5 parts by weight of CaO, 3 to 5 parts by weight of adhesive resin, and 2 to 3 parts by weight of paraffin or wax. Since wood flour or chaff powder and CaO are in the form of powder, it is preferable to use polypropylene in the form of powder so that resins and them are not mixed unevenly. And when the glass fiber is added in the form of powder, it is harmful to the human body of the worker, so it is added to the blender in the form of pellets and blended.

In addition to the polypropylene, the surface layer compounding step (S20) may further include an inorganic material and an additive material as described in the above-described configuration, and the surface layer composition may include 40 to 80 parts by weight of polypropylene and 20 to 60 inorganic materials. It consists of parts by weight, 2-3 parts by weight of pigment, 2.5-3.5 parts by weight of UV stabilizer (2500-3500 PPM), and put into the compounding machine in the form of pellets mastered for uniformity in appearance Enough mixing is allowed to extrude onto a uniform surface.

Next, the extrusion step (S30) requires two extruders for the surface layer and the intermediate layer in order to obtain a three-layer structure of the plate, using a co-extrusion T-die (T-die). And the temperature of the extruder is preferably working at 160 ℃-190 ℃ to prevent carbonization of wood flour or chaff powder, and the temperature of the die is preferably made of 180 ℃-200 ℃.

Next, the forming step (S40) is carried out in the process of passing through the roller to rotate to engage both surfaces of the extruded sheet for the precise thickness and surface state of the plate extruded from the die. Therefore, while passing through the roller, the plate has a constant thickness and surface condition, where it is advantageous in terms of physical properties and productivity to rotate the roller at a speed faster than the die extrusion speed within the range in which the plate extruded from the die is not broken. In order to stabilize the dimensional stability of the sheet, the slow cooled plate should be cut after 24 hours.

The plate for sports facilities according to the present invention developed as described above was manufactured and tested by the Korea Research Institute of Chemical Technology, wherein the plate produced for the experiment was made of 1.5 mm thick surface layer, the composition ratio of 50 parts by weight of polypropylene, talc 47 It was set as the weight part and 3 parts of pigment / UV stabilizer (UV stabilizer 3000PPM). The intermediate worm was 9mm thick with 52 parts by weight of polypropylene, 28 parts by weight of chaff, 28 parts by weight of glass fiber, 5 parts by weight of CaO, 3 parts by weight of adhesive resin, and 2 parts by paraffin. -Test analysis results obtained after producing 12mm plate by die are shown in Table 1 below.

TABLE 1

Plates for sports facilities and manufacturing method according to the present invention as described above, when used in fences, such as skateboards and flooring, hockey field, ice sheet case, etc. compared to conventional plywood or plastic sheeting impact resistance, shrinkage resistance, bending Since the processability is better, it has the effect of having safety, competition performance and appearance suitable for use in various sports facilities.

Claims (13)

In the board for sports facilities, An interlayer formed by selecting any one of wood flour or chaff powder together with polypropylene in a predetermined amount, including glass fiber, CaO, and an adhesive resin, and selecting any one of paraffin and wax; A plate for sports facilities comprising polypropylene and having a surface layer fused to both surfaces of the intermediate layer. delete delete According to claim 1, wherein the intermediate layer is 50 to 60 parts by weight of the polypropylene, 15 to 32 parts by weight of the wood flour or chaff powder, 10 to 13 parts by weight of the glass fiber, 3 to 5 parts by weight of CaO, the adhesive resin 3 to 5 parts by weight of the paraffin or wax 2-3 parts by weight of the sports equipment, characterized in that the composition. The plate of claim 1, wherein the surface layer contains an inorganic material and an additive. 6. The plate of claim 5, wherein the additive includes a UV stabilizer and a pigment. According to claim 6, wherein the surface layer is 40 to 80 parts by weight of the polypropylene, 20 to 60 parts by weight of the inorganic material, 2 to 3 parts by weight of the pigment, 2.5 to 3.5 parts by weight of the UV stabilizer (2500 to 3500PPM) Plate for sports facilities, characterized in that the composition. In the manufacturing method of the board material for sports facilities, An intermediate layer blending step of selecting and blending any one of polypropylene and wood flour or chaff powder with any one of glass fiber, CaO, adhesive resin, paraffin and wax; A surface layer compounding step of separately compounding a surface layer of polypropylene; An extrusion step of separately extruding the surface layer composition and the intermediate layer composition which have undergone the surface layer compounding step and the intermediate layer compounding step, through a die, into a three-layered plate; The method of manufacturing a plate for a sports facility, characterized in that the molding step of molding while passing through the roller upper and lower of the three-layer structure of the three-layer structure through the extrusion step. delete According to claim 8, The interlayer composition is 50 to 60 parts by weight of the polypropylene, 15 to 32 parts by weight of the wood flour or chaff powder, 10 to 13 parts by weight of the glass fiber, 3 to 5 parts by weight of CaO, the adhesive 3 to 5 parts by weight of resin, the paraffin or a wax manufacturing method of a plate for sports facilities, characterized in that 2-3 parts by weight of the wax. The method of claim 8, wherein in the surface layer compounding step, the surface layer composition comprises an inorganic material and an additive. The method of claim 11, wherein the additive comprises a UV stabilizer and a pigment. The method of claim 12, wherein the surface layer composition is 40 to 80 parts by weight of the polypropylene, 20 to 60 parts by weight of the inorganic material, 2-3 parts by weight of the pigment, 2.5 to 3.5 parts by weight of the UV stabilizer (2500 to 3500PPM) Method for producing a plate for sports facilities, characterized in that the composition.

Images