KR102141518B1 - Double-extrusion synthetic wood deck panel with excellent slip resistance - Google Patents

Abstract

The present invention relates to a synthetic wood deck material having excellent slip resistance, including a core portion and a skin portion, wherein the core portion includes 10-200 parts by weight of wood powder, 1-50 parts by weight of a filler and 1-10 parts by weight of a binder, based on 100 parts by weight of an olefinic resin, and the skin portion includes 1-20 parts by weight of wood powder, 1-20 parts by weight of a filler, 0.1-5.0 wt% of a crosslinking agent, 1-100 parts by weight of a styrenic thermoplastic elastomer or EPDM/PP resin, 1-15 parts by weight of an adhesion enhancer, 1-5 parts by weight of a UV stabilizer and 1-5 parts by weight of a binder, based on 100 parts by weight of an olefinic resin. The double-extruded synthetic wood deck material uses a conventional synthetic wood material for the most part, while using a thermoplastic elastomer having excellent slip resistance only in the skin portion, and thus realizes excellent slip resistance on the surface and can save the cost by at least 40% as compared to the conventional anti-slip deck panel. Meanwhile, according to the present invention, an adhesion enhancer is used, while the core portion and the skin portion have different compositions, and thus separation of the core portion and the skin portion from each other can be prevented and a synthetic wood deck panel having excellent weathering resistance can be provided.

Description

Double-extrusion synthetic wood deck panel with excellent slip resistance

The present invention relates to a synthetic wood deck panel excellent in slip resistance produced by double extrusion, and more specifically, the core part is made of a conventional synthetic wood composition such as polyolefin resin and wood powder and filler, but the skin part has a large slip resistance. It relates to a double-extrusion synthetic wood deck panel to which a thermoplastic elastomer is applied.

Recently, there is a continuous demand for light civil engineering and construction materials with high strength. Accordingly, an extruded product called Wood Plastic Composite (hereinafter referred to as WPC), which is manufactured by mixing wood and plastic having a surface texture and pattern similar to natural wood, is in the spotlight.

The WPC is mainly produced by melt-extruding wood powder and various additives in various thermoplastic resins such as polyethylene and polypropylene. WPC has several advantages such as excellent processability of plastic, beautiful appearance of wood, and high strength, low price, and variety of application fields compared to the case of conventional wood or plastic single materials, and has recently been used in various places such as exterior tech and fences. .

Deck materials for trails and hiking trails, which have been widely used in recent years, are designed to prevent slip accidents because many people step on them. In particular, the outdoor deck installed on the beach, the trails and trails of hiking trails are highly moist or have many elements that can cause slippage, such as rain and snow, so the anti-skid function is most important, thus forming an uneven pattern on the surface of synthetic wood. It has been given a non-slip function by making a groove or forming a groove in the longitudinal direction.

Conventionally, in order to prevent slipping, an uneven pattern is formed on the surface of a synthetic wood or a groove is formed in a lengthwise direction to impart anti-slip function, but this surface processing method has an anti-slip effect at the beginning of installation, but many people step on it. As it passes, the surface quickly wears and loses its anti-slip function, causing a problem.

Patent registration number 10-1855362 Patent registration number 10-1107057

The present invention is to solve the above problems, and in the synthetic wood deck material that is double extruded into the core part and the skin part, it comprises a styrene-based thermoplastic elastomer or EPDM (Ethylene Propylene Diene Monomer Rubber)/PP resin only in the skin part to make it slip. It is to provide an outdoor synthetic wood decking agent with excellent weatherability by improving the peel strength of the core and skin parts by applying an adhesive improving agent to maximize the bonding strength of the core and skin parts while maximizing resistance.

In order to achieve the above object, the present invention is composed of a core part and a skin part, and the core part is 10 to 200 parts by weight of wood powder, 1 to 50 parts by weight of filler, and 1 to 10 parts by weight of binder with respect to 100 parts by weight of olefin resin. Contains, skin parts 1 to 20 parts by weight of wood powder, 1 to 20 parts by weight of filler, 0.1 to 5.0 parts by weight of crosslinking agent, 1 to 100 parts by weight of styrene-based thermoplastic elastomer or EPDM/PP resin, adhesion to 100 parts by weight of olefin resin It provides a double-extrusion synthetic wood decking material having excellent slip resistance, characterized in that it comprises 1 to 15 parts by weight of a sex improving agent, 1 to 5 parts by weight of a UV stabilizer and 1 to 5 parts by weight of a binder.

The core portion provides a double-extrusion synthetic wood decking material having excellent slip resistance, further comprising 1 to 10 parts by weight of an adhesive improving agent.

The styrene-based thermoplastic elastomer (stylenic thermoplastic elastomer) is a styrene-ethylene-ethylene-propylene-styrene copolymer (SEEPS) provides a double extrusion synthetic wood decking material having excellent slip resistance.

The adhesive improving agent is urethane dimethacrylate (UDMA), dipentaerythritol pentaacrylate monophosphate (PENTA), 2-hydroxyethyl methacrylate (2-hydroxyethyl methacrylate, HEMA) Provided is a double extruded synthetic wood decking material having excellent sliding resistance, which is one of the selected ones.

The skin portion provides a double-extrusion synthetic wood decking material having excellent sliding resistance, characterized in that the thickness is 0.8 to 1.4 mm.

The double-extrusion synthetic wood decking material according to the present invention exhibits excellent sliding resistance on the surface by applying a thermoplastic elastomer having excellent sliding resistance only to the skin portion while using most of the existing general synthetic wooden materials for the core portion, while the existing sliding resistance decking material is exhibited. Compared to this, it has the effect of reducing the cost by more than 40%.

On the other hand, by varying the composition of the core portion and the skin portion, by applying an adhesive improving agent to prevent peeling of the core portion and the skin portion can be produced a synthetic wood deck material having excellent weather resistance.

By containing the components necessary for the composition of the existing synthetic wood in the core layer, it is possible to exert excellent functionality according to various functional ingredients added to the skin part while having the same physical properties as the existing synthetic wood panels.

1 is a prototype form of a double-extrusion synthetic wood decking material according to the present invention.

The present invention is composed of a core portion and a skin portion, the core portion comprises 10 to 200 parts by weight of wood powder, 1 to 50 parts by weight of a filler and 1 to 10 parts by weight of a binder with respect to 100 parts by weight of the olefin resin, and the skin part 100 of the olefin resin 1-20 parts by weight of wood powder, 1-20 parts by weight of filler, 0.1-5.0 parts by weight of crosslinking agent, 1-100 parts by weight of styrene-based thermoplastic elastomer or EPDM/PP resin, 1-15 parts by weight of adhesive improving agent, ultraviolet light It relates to a double-extrusion synthetic wood decking material having excellent slip resistance, characterized in that it comprises 1 to 5 parts by weight of the stabilizer and 1 to 5 parts by weight of the binder.

First, the composition of the double-extrusion synthetic wood decking material having excellent slip resistance according to the present invention is as follows.

The double-extrusion synthetic wood decking material of the present invention is composed of a core portion and a skin portion, and the thickness of the skin portion is 0.8 to 1.4 mm, and is double-extruded in a form surrounding the core portion.

The core portion is made of a composition formed by mixing an olefin resin, wood powder, filler, and binder, and may further include an adhesive improving agent.

The olefin-based resin in the core part may be polypropylene (PP) and polyethylene (PE) and copolymers thereof or a mixture thereof, preferably polypropylene (PP) or high density polyethylene (HDPE), low density polyethylene (LDPE) can be used by mixing a resin selected from. The olefin-based resin is to make the deck material to be made rigid, and to have a weather resistance by reducing the linear expansion coefficient.

The core portion includes wood flour, which is one of organic fillers, and may be wood flour, wood pellet, wood fiber, or stakes. Can. The wood powder contains 10 to 200 parts by weight based on 100 parts by weight of the olefinic resin in the core.

The filler may be talc, calcium carbonate, wollastonite, kaolinite, talc or mica, preferably talc, calcium carbonate, and contains 1 to 50 parts by weight based on 100 parts by weight of the olefin resin. Fillers are used to improve mechanical strength and dimensional stability.

The binder may be a silane resin or maleic anhydride modified resin, preferably maleic anhydride modified resin. The binder is used to prevent degradation of strength of products due to olefin resins, styrene-based thermoplastic elastomers or EPDM/PP resins and organic fillers used in large amounts, and to impart elasticity and strength to natural wood levels. The binder is 1 to 10 parts by weight based on 100 parts by weight of the olefin resin.

The skin part is composed of an olefin-based resin, wood powder, filler, cross-linking agent, styrene-based thermoplastic elastomer or EPDM/PP resin, adhesion improving agent, ultraviolet stabilizer, and binder.

As the olefin-based resin in the skin part, the same type of resin as the olefin-based resin in the core part may be applied, and other olefin-based resins may be applied according to the function required for the skin part.

The neck portion of the skin portion is as described in the core portion. Specifically, it may be wood flour, wood pellet, wood fiber, or a stake, and may be used by mixing two or more. The content is 1 to 20 parts by weight based on 100 parts by weight of the olefin resin applied to the skin. The content of wood powder in the skin part is intended to promote the natural texture and strength of the surface of the deck material, and if the content of wood powder is less than 1 part by weight, the natural texture, etc. is insignificant. The surface characteristics of the skin part may be deteriorated.

The filler of the skin part may be talc, calcium carbonate, wollastonite, kaolinite, talc or mica in the same manner as the core part, preferably talc, calcium carbonate, and 100 parts by weight of the olefin resin of the skin part 1 It contains ~20 parts by weight.

The skin portion contains 0.1 to 5.0 parts by weight based on 100 parts by weight of the olefin resin. Dicumyl peroxide or benzoyl peroxide is used as a cross-linking agent, and the cross-linking agent is used to improve heat resistance. If it does, due to too fast crosslinking and a large amount of crosslinking, a gel is formed and sufficient crosslinking is not achieved, making it difficult to control the working time.

The skin part contains 1 to 100 parts by weight of a styrene-based thermoplastic elastomer or EPDM/PP resin to improve slip resistance. Styrene-based thermoplastic elastomers are styrene-ethylene/butadiene-styrene polymer (SEBS), styrene-butadiene-styrene polymer (SBS), styrene-ethylene/propylene-styrene copolymer (SEPS), styrene-ethylene-ethylene -Propylene-styrene copolymer (SEEPS) or styrene-isoprene-styrene copolymer (SIS). More preferably, it is most preferable to apply a styrene-ethylene-ethylene-propylene-styrene copolymer (SEEPS) for the anti-slip effect.

EPDM/PP resin refers to a thermoplastic dynamic crosslinking product (TPV) that is a thermoplastic crosslinked product formed by blending a thermoplastic polypropylene (PP) and an ethylene propylene diene (EPDM) monomer. As a representative PP/EPDM resin TPV manufacturer, it is produced in Korea's Lotte Chemical, Kumho Petrochemical, Hwaseung, and Hyundai IP. By applying the thermoplastic elastomer to the skin portion, heat resistance, durability, and high friction characteristics can be secured, thereby exhibiting the anti-slip function of the deck material to be manufactured.

The skin part contains 1 to 15 parts by weight based on 100 parts by weight of the olefin resin in the skin part. The adhesive improving agent is for improving the adhesion between the core layer and the skin layer to prevent the adhesive interface from being easily peeled off. Adhesion improvers are selected from urethane dimethacrylate (UDMA), dipentaerythritol pentaacrylate monophosphate (PENTA), and 2-hydroxyethyl methacrylate (HEMA). Use any one or more.

When the adhesive improving agent is applied in less than 1 part by weight, the effect of improving the adhesion is negligible, and when it exceeds 15 parts by weight, the effect of improving the adhesion does not increase significantly. It is understood that such an adhesive improving agent acts on the interface between the material of the core portion and the skin portion to increase the interfacial bonding force by acting a bonding force between functional groups.

The adhesive improving agent may be included only in the skin portion, but the adhesive improving agent in the core portion may be included in 1 to 10 parts by weight based on 100 parts by weight of the olefin resin of the core portion. In this case, when the adhesive improving agent is simultaneously included in the core portion and the skin portion, the adhesive improving agent is firmly bonded at the interface between the core portion and the skin portion, so that the effect of enhancing the peel strength can be large.

The ultraviolet stabilizer included in the skin part is one or more of salicylate-based, benzophenone-based, benzotriazole-based, cyanoacrylate-based, benzoate-based, triazine-based and amine-based ultraviolet stabilizers. The ultraviolet stabilizer is used to prevent deterioration by ultraviolet light (UV), which has a function of absorbing and/or blocking ultraviolet light, and 1 to 5 parts by weight based on 100 parts by weight of the olefin resin.

Similar to the core portion, the skin portion may include 1 to 5 parts by weight of a binder. The binder is used to prevent the degradation of the strength of the product due to the olefin resin, styrene-based plastic elastomer, and organic filler, which are used in large quantities, and to impart elasticity and strength of natural wood.

Pigments may be added to the skin part for the feel of wood, and may further include a lubricant, an antibacterial agent, an antioxidant, a flame retardant, an anti-aging agent, etc., which is a functional component selected according to the use of the synthetic wood decking material. .

In the double-extrusion synthetic wood decking material having excellent slip resistance according to the present invention, each component constituting the core is manufactured in a pellet form using a primary extruder, and the core of the synthetic wood decking material is manufactured using a secondary extruder. The core portion to be formed is first molded. Synthetic wooden decking material may be manufactured by extruding and molding the skin portion using each composition of the skin portion on the surface of the core portion thus manufactured. The skin part is manufactured to surround at least one side of any one side of the core part as shown in FIG. 1. The method of manufacturing a synthetic wood decking material by double extrusion is according to known equipment and methods, so a detailed description is omitted.

The core portion may be manufactured to have a thickness of 10 mm to 50 mm depending on the purpose or use of the synthetic wood decking material, and may have a thickness of 0.8 to 1.4 mm, but is not limited thereto.

Hereinafter, specific examples and comparative examples according to the present invention will be described. The following examples are provided by way of example only to help understanding of the present invention, and the technical scope of the present invention is not limited thereby.

[ Example 1 to 4]

After forming the core portion with the components and contents as shown in Table 1 below (primary extrusion), the entire surface of the core portion was formed with a thickness of 1.1 mm and covered with the skin (secondary extrusion), as shown in FIG. 1. It was made of a synthetic wood decking material (length 2.4m, width 140mm, thickness 22mm). At this time, as shown in Table 1 below, the components and contents constituting the core portion and the skin portion were changed according to each example.

The filler was talc, the crosslinking agent was benzoyl peroxide, the ultraviolet stabilizer was benzotriazole, the adhesion improving agent was urethane dimethacrylate (UDMA), and the binder was maleic anhydride modified resin in an amount according to Table 1.

[ Comparative example ]

A synthetic wood deck material was prepared in the same way as usual, and the thermoplastic elastomer of the skin part was replaced with ethylene propylene dien rubber (EPDM), no adhesive improving agent was used, and the content of the binder was different. It is the same as Example 1 except the point.

[Table 1]

Hereinafter, Table 2 shows the measurement results of the slip resistance and peel strength of the double-extruded synthetic wood decks of Examples 1 to 4 and Comparative Examples prepared by the above method.

<Measurement method>

1. The interlayer peel force was applied at a speed of about 150 mm/min using an adhesive strength meter, and the interlayer peel strength (kgf/15 mm) between the core portion and the skin portion was measured at a 180 degree peel angle.

2. Slip resistance (BPN) was measured by the KS F 2375 method.

The interlayer peeling force was high when the adhesive improving agent was applied to the skin portion, and the peeling force increased as the content increased, and was highest in Example 4 in which the adhesive improving agent was applied to the core portion and the skin portion together. appear.

Also, the higher the slip resistance, the better the value, which was higher when styrene-ethylene-ethylene-propylene-styrene copolymer (SEEPS) was used as the thermoplastic elastomer in the skin part, and styrene-ethylene was used rather than EPDM. -When ethylene-propylene-styrene copolymer (SEEPS) was applied alone, the slip resistance was excellently measured.

The embodiments described above are illustrative in all respects and should be understood as non-limiting, and the scope of the present invention is indicated by the following claims rather than the above detailed description, from the meaning and scope of the claims and equivalent concepts thereof. It should be construed that any resulting altered or modified form is included within the scope of the present invention.

Claims (5)

It consists of a core part and a skin part,
The core part contains 10 to 200 parts by weight of wood flour, 1 to 50 parts by weight of the filler, 1 to 10 parts by weight of the binder, and 1 to 10 parts by weight of the adhesive improving agent relative to 100 parts by weight of the olefin resin,
The skin part is 1 to 20 parts by weight of the wood powder, 1 to 20 parts by weight of the filler, 0.1 to 5.0 parts by weight of the crosslinking agent, 1 to 100 parts by weight of the styrene-based thermoplastic elastomer or EPDM/PP resin, and the adhesion improving agent 1 to 100 parts by weight of the olefin resin. A double-extrusion synthetic wood decking material having excellent sliding resistance, comprising ~15 parts by weight, 1 to 5 parts by weight of a UV stabilizer and 1 to 5 parts by weight of a binder. delete According to claim 1,
The styrene-based thermoplastic elastomer is a styrene-ethylene-ethylene-propylene-styrene copolymer (SEEPS) double extruded synthetic wood decking material having excellent sliding resistance. According to claim 1,
The adhesive improving agent is a urethane dimethacrylate (UDMA), dipentaerythritol pentaacrylate monophosphate (PENTA), 2-hydroxyethyl methacrylate (2-hydroxyethyl methacrylate, HEMA) Double extruded synthetic wood decking material having excellent sliding resistance, characterized in that at least one selected. According to claim 1,
Double extruded synthetic wood decking material having excellent sliding resistance, characterized in that the thickness of the skin portion is 0.8 to 1.4 mm.

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