KR20040037617A - Resin composition for artificial ice skating rink - Google Patents

Abstract

PURPOSE: Provided is a resin composition for an artificial ice skating rink, which reduces the friction on a surface for skating, and shows excellent surface smoothness, durability, low wear resistance and low water absorption. CONSTITUTION: The resin composition for an artificial ice skating rink panel containing a first panel member, a second panel member and a spline member(3) comprises: 97.00-99.50 parts by weight of high molecular weight polyethylene; 0.20-0.80 parts by weight of a hydrophobic component; 0.09-0.65 parts by weight of an UV stabilizer; 0.09-0.20 parts by weight of an anti-oxidant; 0.10-1.20 parts by weight of titanium dioxide; and 0.02-0.15 parts by weight of an anti-static agent. The resin composition has no coloring agents and bleaching agents.

Description

Resin composition for artificial ice skating rink {RESIN COMPOSITION FOR ARTIFICIAL ICE SKATING RINK}

The present invention relates to a resin composition with reduced surface friction that is particularly suitable for artificial ice skating links.

Ice skating is one of the many sports people enjoy in many places. When doing this exercise on natural ice, either an appropriately sized outdoor or indoor link should be provided. The construction and management of outdoor links depends on moody weather and such links cannot be used in warm climates or in warm seasons. Indoor links using natural ice, on the other hand, must be equipped with a centralized cooling system to keep the ice surface at an appropriate temperature and to prevent the ice from melting. Ice skating rinks made of natural ice, whether outdoors or indoors, need to be resurfaced periodically to maintain a smooth ice surface and enough to skate. Such resurfacing typically consists of an expensive self-propelled ice surface retouching device, often referred to as the Zamboni device.

To solve this difficulty, several types of artificial skating links have been proposed previously. For example, U.S. Patent No. 3,771,891 to Nirenski et al teaches an artificial ice skating link consisting of panels of plastic sheeting connected together by integrating a groove formed integrally at the edge of the rectangular panel. The edges are carefully mechanized to ensure precise fit so that when they are joined together, no cracks or bumps are typically created at the joints where the edges of separately adjacent panels are joined together. Moreover, in U.S. Patent No. 3,771,891 to Nirensky et al., A grid of steel straps operating along the bottom of a link where the panels are held together by opposing pairs of channel members held on the outer surface of the link assembly and fixed under pressure of the channel members. Describes stretching together. In terms of the equipment and labor required in the installation process, it is desirable to eliminate the need for external tightening and fastening means when assembling artificial ice skating links.

Toshio, U.S. Patent No. 4,169,688, teaches an artificial ice skating link floor, in one embodiment wherein a plurality of plastic plates are provided with edge channels and common inserts such as metal or synthetic resin are opposed to each other. It is fed into the panel channel, and then the inside diameter must be drawn through the plate, the fixing pin is inserted into the insert, and the pin head is cut to make the plate surface smooth and even. However, the need for such fixing pins makes the assembly or disassembly of the skating link more complicated and more labor intensive. In the second embodiment of Tosio's U.S. Pat. No. 4,619,688, the plate is disposed on a layer of cushioning material, and then the plate is connected using an U-shaped, T-shaped or tapered shaped insert or alternatively an mechanical hook-like inter An adhesive tape should be placed under the plate seam where no lock occurs between the channel and the insert. The use of a cushioning layer in the second embodiment of Tosio's' 688 patent is costly and labor intensive, and also requires complex three-dimensional shapes for the inserts and complementary channel shapes at the plate edges, leading to manufacturing costs and complexity. This increases and is expensive and laborious when using other adhesive tapes in the plate seam.

Moreover, the interlock design used in one of the Tosio designs (see FIGS. 9A-B) can crack, break and bend in complex shaped connecting splines. The ice skating link material expands and contracts and the force exerted by the skater must be absorbed by the ice skating flooring. That is, the inconsistency of expansion and contraction between the various parts in the assembly is not limited to buckling, but also to any small plastic part used for connecting splines that tend to absorb stress from adjacent large plastic panel weights. Problems such as breakage and / or warpage problems can be caused. Thus, the Tosio patent can expect that complex shapes or small plastic parts proposed to be suitable for interlocking patterns increase the risk of assembly failure. In a third embodiment of Tosio's 688 patent, the plates are reassembled on a cushion layer and the edges of the plates are melted or heat bonded together. Such heat bonding requires special equipment and results in a permanently integrated link structure that is difficult to disassemble later if necessary or desired.

Low friction composite structural elements for artificial ice skating links are also described in US Pat. No. 5,387,343, invented by the presently mentioned inventors. Generally, conventional designs and structures have included panels each formed as a stack of thin polyolefin plastic layers (eg, 4-7 mm) bonded to both sides of a thick central wood core part. These composite panels were assembled with the channel and spline arrangement using plastic splines embedded in channels formed by the wood cores of adjacent panels. Compared with the prior art, the production of adhesives and relatively thin plastic surface layers used in the lamination process associated with the invention have been consistently improved over the prior design.

However, a problem associated with the conventional wood core base design of US Pat. No. 5,387,343 is that it cannot exist in an outdoor skating environment. In other words, it has been found that exposure to water, high humidity and other sources of moisture causes unwanted expansion of the wood cores in the composite. They also found that continued exposure to water caused mold and eventually caused the wood to rot. Water damage to the wood core components of our prior design ultimately made the panel assembly unstable and inadequate for ice skating. Another problem associated with conventional plastic wood composite panel structures is incompatibility due to mismatches in the expansion and contraction behavior of the two different laminate materials involved. Wood expands and contracts at a slower rate than plastics (eg polyethylene), so that thin (4-7mm) plastic surface sheets are peeled from the wood core regardless of the use of adhesive. Due to such peeling of the thin plastic sheet, the surface becomes rugged and it becomes difficult to skate.

Accordingly, there is a need to address the prior art problems of buckling, peeling and / or water damage issues to provide an improved artificial ice skating surface that is easier and less expensive to manufacture, install, and manage.

On the other hand, the resin composition for artificial ice skating links known so far has some problems in the smoothness of its surface when manufactured through extrusion, and when manufactured as a panel, the difference in the thickness of the panel joint portion exceeds the allowable speed Skatering can cause safety problems, and when used outdoors for a long time, the surface becomes rough, which sometimes causes durability problems, such as preventing smooth sliding of the skate and making comfortable skating difficult. This is considered to be due to the incompatibility of the components in the composition when producing the resin composition.

Also, when skating, experienced skaters feel very sensitive to the texture of the link surface. Especially, the composition ratio is very important in determining the texture of the link surface. It is a factor. However, conventional resin compositions for skate links have a somewhat rough surface that is not enough for skilled skaters to concentrate on speedy skating, and therefore, an important problem has been to increase surface lubricity.

Problems in the art are solved with the improved resin composition for artificial ice skating links of the present invention. The resin composition for the synthetic ice skating rink of the present invention is well suited for outdoor application and is irrelevant to water exposure. In addition, after servicing the link, the panel assembly neither buckles nor has a surface layer where the core layer can curl, delaminate or break. Thus, ice skating links constructed in accordance with the teachings of the present invention are more permanent and stable than conventional designs.

And the resin composition of this invention can satisfy performance conditions, such as permanentness suitable for skating, stability, low abrasion, low water absorption, low surface friction, and high surface maintainability.

In one embodiment, the artificial ice skating rink using the resin composition of the present invention consists of a plurality of panels for providing an ice skating surface. Each panel is arranged with an elongated channel having a longitudinal axis and a transverse axis. An elongated spline is provided for slidingly inserted into the lateral channel along the transverse axis of the channel and slidingly engaged with the spline to receive in the channel of the other panel when subjected to lateral forces. In this way a separate panel is fully supported by the spline for relative motion along the transverse axis of its respective channel. To achieve this, the panels and splines used in the present invention are specially fabricated to ensure accurate dimensional tolerances.

An important feature of the artificial skating link using the resin composition of the present invention is that only adjacent panels can be attached to at least one other panel without the use of separate adhesive bonds or mechanical attachment means, machinery or measuring instruments. It can be assembled together into a stable assembly for skating using only channel and spline connections. Thus, the present invention assembles the assembly panel into a stable and integrated structure suitable for skating in all aspects by using adhesive tapes, glues, adhesives, heat adhesives, attachment pins, nails or projections (in whole or in part), straps, and the like. And the need for reinforcement is eliminated. The invention also uses interlocking means of complex three-dimensional shapes, such as T- or U-shapes and tends to bend, plastic aging effects and breakage and eliminate the need to connect more fragile adjacent panels.

Another important feature of the artificial skating link using the resin composition of the present invention is that the assembly panel is positioned such that the major surface of the bottom of the panel is in direct physical contact with a floor substrate that does not require any intervening cushion (eg foam) layers. will be. This aspect of the invention reduces the number of assembly components and accessories required to install the skating links. Another advantage of the present invention is that the skating link of the present invention provides a stable skating surface even without wood parts or components and the absence of wood parts is more suitable for outdoor use where improper exposure to water and / or humidity may be involved. To produce. Skating links using the resin composition of the present invention also provide a skating pleasure comparable to that of natural ice without causing excessive wear to the edges of the skate blades.

Moreover, the link panel component used in this artificial ice skating link is a uniform single slab that is not laminated or combined with wood or the like. Taking advantage of this, in another embodiment of the present invention, plastic panels can be loaded with relatively large amounts of lubricant during its manufacture and extrusion process because no laminated or wood components are needed or used in the assembly. The panel surface inherently has improved lubricity due to such a high level of lubrication in use. Higher loading levels of lubricants impart higher sliding factors to the panel and reduce the need for periodic repackaging with external sliding aids such as silicone oil. This effectively reduces the downtime associated with the skating link using the resin composition of the present invention.

As will be appreciated, the artificial ice skating rink using the resin composition of the present invention represents a significant improvement in the art.

1 is a plan view showing an assembled section of a skating link panel in a skating link using the resin composition of the present invention.

FIG. 2A is a cross-sectional view illustrating a junction section between panels in an artificial skating link assembly process according to the AA ′ section of FIG. 1 according to a skating link using the resin composition of the present invention. FIG.

FIG. 2B is a cross-sectional view showing the bonding section between the assembled panels of the artificial skating link according to the AA ′ section of FIG. 1 according to the skating link using the resin composition of the present invention. FIG.

The present invention provides a panel comprising: first panel means for providing an ice skating surface, on which an elongated first channel having a longitudinal axis and a transverse axis is arranged; Second panel means for providing an ice skating surface having a second channel having a longitudinal axis and a transverse axis; And slidingly inserted into the first channel along the transverse axis of the first channel in the first side direction and sliding in the second channel when the second panel means is slidably engaged with the spline to receive the force in the lateral direction. A resin composition for an artificial skating link panel, wherein the first panel means and the second panel means are entirely supported by the spline means with respect to relative movement along the transverse axis. The composition is 97.00 to 99.50 parts by weight of high molecular weight polyethylene, 0.20 to 0.80 parts by weight of hydrophobic component, 0.09 to 0.65 parts by weight of UV stabilizer, 0.09 to 0.20 parts by weight of antioxidant, 0.10 to 1.20 parts by weight of titanium dioxide and antistatic A resin composition comprising from 0.02 to 0.15 parts by weight of a component, provided that other colorants Does not relate to an optical bleaching agent).

The synthetic resin polymer used as the primary component of the resin composition of the present invention is polyethylene such as high molecular weight polyethylene (HMWPE) or high density polyethylene (HDPE). The polyethylene is preferably an ultrahigh molecular weight polyethylene having a viscosity based molecular weight (M ₀ ) of about 250,000 to 2,000,000.

Particularly suitable polyethylenes are high molecular weight polyethylenes (HMWPE), such as the 5100 series of high molecular weight polyethylenes, available from various sources such as General Electric, often referred to as "HMWPE 5100". Similar polyethylenes are also available under the trade name PAXON BA5O-100 from Allied and under the trade name MARLEX HXM 50100 from Phillips. Other polyethylene resins may also be used, such as DuPont ELTREX B5920 High Density Polyethylene.

Polyethylene of the present invention is used in 97.00 to 99.50 parts by weight, if used less than that may cause problems in the durability and stability of the panel, if used in excess of it may inhibit the use of other additives may reduce the slip of the link surface, etc. .

The resin composition of the present invention contains a small amount of additives and auxiliaries. First, it further contains a hydrophobic component. This hydrophobic component can be, for example, a fatty acid ester of an alkaline earth metal or a fatty acid selected from calcium stearate, calcium palmitate, magnesium stearate, magnesium palmate, stearic acid and palmitic acid. Preferably the hydrophobic component is calcium stearate. Such hydrophobic components are multifunctional aids and are also used as release agents to facilitate the manufacture of flat panels, for example by extrusion processes. These hydrophobic components also tend to impart an inherent degree of lubrication to the surface of the panel. Other conventional hydrophobic components can also be used for the extruded plastic.

In the resin composition of the present invention, the hydrophobic component may include 0.20 to 0.80 parts by weight. When the hydrophobic component is less than this, the smoothness or lubricity of the panel may be lowered, and in many cases, the compatibility of the resin composition may be reduced. The content of the hydrophobic component as described above of the present invention is significantly increased compared with the conventional resin composition, which can increase the sliding and lubricity of the surface of the ice skating link.

The resin composition of the present invention may further include at least one ultraviolet stabilizer. Ultraviolet light stabilizers are for example 2-alkyl- (2-hydroxyphenyl) -2H-benzotriazole, benzophenone triazine, phosphonate, resorcinol monobenzoate, bis (2,2,6, 6-tetramethyl-4-piperidinyl) sebacate (TINUVIN 770), 2- (2 "-hydroxy-3 ', 5'-di-tert-amylphenyl) benzotriazole (TINUVIN 328), TINUVIN 111FDL , TINUVIN 327, TINUVIN 328, TINUVIN 622 and TINUVIN 783, SIASORB UV531, SIASORB 3346, and UVASORB HA88 (from 3-V Chem) TINUVIN is a trade name of Ciba-Geigy. It is included in an amount of 0.09-0.65 parts by weight in consideration of UV stabilization effect and economic efficiency.

The resin composition of the present invention may further include at least one heat stabilizer. The heat stabilizer can be selected from, for example, WESTON 618-HT (Borg-Warner), WESTON HPM-12 and TLPE. The component may be contained in 0.05-0.15 parts by weight in consideration of the physical properties of the composition.

The resin composition of the present invention may further include an antioxidant. Antioxidants include, for example, butylhydroxytoluene, butylated hydroxyanisole, and octodecyl 3,5-di-tert-butyl-4-hydroxyhydrocinnamate (IRGONOX 1076, IRGANOX B225, from Ciba-Geigy, And commercially available as DOVERNOX 76). Preferably the antioxidant is butylhydroxy-toluene or octodecyl 3,5-di-tert-butyl-4-hydroxyhydrocinnamate. In the present invention, the antioxidant is included in an amount of 0.09-0.20 parts by weight, in consideration of the antioxidant effect and economics.

The resin composition of the present invention may further include titanium dioxide (eg, RCL-4, RCL-9 and RCL-11) as a medicament for making the surface of the polymer layer appear uniformly white. In the present invention, titanium dioxide is included in an amount of 0.10 to 1.20 parts by weight in view of its effect and economical efficiency.

The resin composition of the present invention may further include an antistatic component selected from glycerol, glyceryl monooleate, glyceryl monostearate, other glycerol esters, ethyl monostearate and glycerides. Preferably the antistatic component is glycerol or glycerol esters. Glycerol and glycerides also serve to provide inherent lubricity to the panels and their surfaces. ATMER 129 ANTI-STAT is a trade name for a useful antistatic agent. The component may be included in an amount of 0.02-0.15 parts by weight in consideration of its effects, economics and physical properties of the composition.

As a feature of the resin composition of the present invention, there is no other colorant and an optical bleach. Examples of colorants include ultramarine blue 5151, ultramarine violet 5052 and blue dye type 82 known as marine blue, and examples of optical bleaches include coumarin derivatives known as UVITEX OB (Ciba-Geigy) or LEUCOPHOR EGM. . It is believed that in the resin composition for ice skating rink, the exact mechanism of action is not known, but it is believed that the above components, in particular, lower the compatibility between the compositional components, thereby adversely affecting the smoothness of the extrusion surface or the smoothness of the link surface for long-term use. For losing. This technical feature of the present invention is not a theoretically descriptive but rather a conclusion that can be obtained only by actually preparing a polymer blend with various changes in component and component ratio, and experimentally testing the physical properties of each. It takes effort.

The resin composition of the present invention may further include at least one release agent to facilitate the extrusion process and provide an inherent lubricity to the surface of the composite structure. This release agent is in addition to the hydrophobic component. The release agent may be selected from the group consisting of CYTEC 3346, CYTEC 6411, and polyethylene glycol 2000. The present ingredient may be included within the range of 0.01-0.15 parts by weight in consideration of the release efficacy and economical efficiency.

Optionally, other components may be included in the polymer of the composite structure. There are compounds such as chlorides or phosphate ions, or triethylenephosphoramide, which provide fire and / or self-extinguishing. Alternatively, the polymer layer may contain at least one component that provides the structure with erosion resistance, antibacterial or anti-eddy currents. Such components may include isomers of trichlorobenzene, orthodichlorobenzene, 2-pivaloyl-1,3-indadione, benzophenone and tin derivatives. Other additives known in the art can also be used.

Due to the characteristic composition components and composition ratios of the present invention, it is possible to achieve the stability and smoothness of the panel during the extrusion process, and when used in a skating link, excellent lubricity and stable and comfortable skating.

Typically, high molecular weight polyolefin (eg polyethylene) slabs or sheets are extruded with a smooth finish on the top used as the skating surface and a matte finish on the side used as the bottom surface of the panel on the substrate floor or surface.

After assembling the panel with the skating link, the friction reducing component selected from silicone resin and silicone oil can be applied to the exposed surface of the top of the assembled panel. Although the artificial ice skating links of the present invention are assembled and operated without a friction reducing component, it is generally desirable to apply the friction reducing component to the panel to further provide stability and comfort.

Preferably the friction reducing component is a high viscosity silicone oil such as General Electric GE-SF-96-5 silicone oil, Dow Corning 200STC silicone oil and Rhone Poulenc 47V5 silicone oil. These silicone oils are preferably used at about 5 centistokes.

Silicones for skating purposes are typically applied every other day, for example every other day, to preserve and maintain the surface as well as to ensure and maintain a constant sliding factor of 90%. In comparison, wet (natural) ice begins with an initial slide factor of 100% but gradually decreases the slide factor to 85% during the second hour of skating. By the third hour of skating, the slide factor was reduced to 78% or less for natural ice. At this time, natural ice should be resurfaced with a machine. As will be appreciated, the artificial ice skating surface of the present invention is much less demanding than natural ice.

While neither desirable nor necessary, the panels can be reinforced and dimensionally stabilized with initially included reinforcements such as glass fibers added to the extrusion or molding of the panels. In addition, although not required, the link structure of the present invention may optionally be installed on at least 6 mm jute or industrial carpet lines, providing additional elasticity to the surface and automatically flattening slightly uneven substrate surfaces. A foam cushion layer is not needed between the bottom of the assembled panel and the substrate support surface.

The structural description of the ice skating rink using the resin composition of the present invention is as follows.

Panels in which the resin composition of the present invention was used have been shown to preferably do not absorb water when tested by ASTM-D-570. The panel preparations described above meet this criterion. Absorption of water is undesirable, as can result from surface irregularities or cracks, localized expansion due to thermal expansion or contraction due to temperature changes from the absorbed water.

The spline is preferably formed from a permanent synthetic resin product, more preferably from a plastic product useful for making panels such as the panel product described above. The spline is preferably a minor component (e.g., > 90% by weight of spline plastic product). Splines can also be prepared from acrylonitrile butadiene-styrene (ABS) copolymers such as ABS POLY-LAC.

The large panel size in which the resin composition of the present invention was used provides more stability to the link assembly by weighting each panel. The weight (approximately 70-100 lbs. Per panel) allows the panel to be fixed, to maintain shifting and to allow rough or very acrobatic skating. The assembled panels also provide a smooth surface with no gaps or bumps at the joints of the panels. The assembled structure is very stable in use and the panel is not misaligned by the force exerted by the skater or by the expansion or contraction of the polymeric material. The artificial skating link assembly of the present invention is dimensionally stable in the absence of wood and, in a preferred embodiment, consists essentially of a uniform monolayer connected through a spline. The panel has a uniform cross section defined between two flat surfaces.

The panel is derived from the resin composition of the present invention which is extruded or molded into the basic desired slab size, and is machined to introduce the channel to the panel side.

The spline using the resin composition of the present invention is preferably used as a uniform blend of polyolefin and PVC, strong enough to prevent cracking even if hammered during installation, but not hard enough to damage the polyethylene panel. Splines have also been developed to be flexible enough to occur when panels expand and export, but hard enough to be easily inserted into channels. The spline and channel must be inserted correctly to the appropriate pressure to prevent buckling or separation of the ring assembly together.

In order to match the desired shape to the panel or spline plastic preparation, the resin composition of the present invention, including polymers, fillers, additives, auxiliaries and the like, can be produced in a high capacity double screw extruder. Extruders, dies, and aids (eg, cooling, dimensioning, postforming, pulling, milling, or cutting) select appropriate dimensions and scales to provide a panel that meets the subject matter described herein. Screw extruders can be used to process many plastics such as HDPE. It can be processed by screwless (ram) extrusion for very viscous polymers such as ultra high molecular weight polyethylene (UHMWPE). The panel using the resin composition of the present invention is preferably extruded into a slabstock sheet for subsequent accurate planarization and mechanization into a finished panel having a peripheral side with channels formed by mechanization. The panel layer is typically extruded to a thickness in the range of about 0.8 to 1.2 inches (about 20.3 to 30.5 mm) as it is partly affected by the expected frequency and stringency of use and the desired service life.

It will be described below in detail with reference to the drawings and embodiments.

In FIG. 1, the spline 3 is made from a uniform plastic product. Preferably the spline is formed in more detail as a polyalloy of polyolefin and PVC. The spline 3 is manufactured to a size that fits precisely into each edge channel 30 formed on the opposing side edges of adjacent separate panels. The corner of the spline is preferably slightly inclined or rounded to facilitate insertion into the channel. The spline dimension is 0.187 + 0.003 / -0.000 inch (0.475 + 0.076 / -0.000 cm) thickness Ts in the direction measured parallel to the thickness parameter T of the channel 30 and the transverse axis t1 of the panel 33. It is 1.40 inches (3.56 cm) wide (Ds) in the direction measured parallel to it.

The spline 3 is preferably manufactured to a thickness Ts of 0.001 to 0.003 inches (0.025 to 0.076 mm) thicker than the panel channel thickness T in order to insert seamlessly between the spline 3 and the channel 30. Acceptable tolerances are very slightly larger at the indicated thickness, such as 0.187-0.190 inches (0.475-0.483 cm), but not smaller. The spline thickness Ts is 0.0 to 2.0%, preferably 0.5 to 2.0%, greater than the thickness T of the channel 30. This desirable 'negative clearance', provided between the spline and the 0.187-inch (0.475 cm) channel, allows it to be properly inserted into the channel made of squares inside. Also, the width Ds of the spline 3 is exactly twice the depth D measurement of the channel 30. In this way, the spline 3 is inserted deeply into the adjacent channel of the opposing panel edge.

In addition, in FIG. 1, as a result of the cutting of the channel 30, the stress is relieved from the edge 33 ′ of the panel sheet 33 during the reduction and removal of the material. This was observed to close the channel 30 of the edge 33 'very slightly so that it would grab or clamp the spline 3 when inserted into the channel 30. This generates an insertion pressure between the panel sheet 30 and the spline 3. This proper friction bond connects the sheets properly and seamlessly with each other.

The large panel sizes used provide more stability for the link by weighting each panel. The weight (about 70-100 lbs. Per panel) allows the panel to be fixed, maintain shifting and allow for rough or very acrobatic skating. The assembled panels also provide a smooth surface with no gaps or bumps at the joints of the panels. The assembled structure is very stable in use and the panel is not misaligned by the force exerted by the skater or by the expansion or contraction of the polymeric material. The artificial skating link is dimensionally stable even in the absence of wood, and in preferred embodiments consists essentially of a uniform monolayer connected through a spline. The panel has a uniform cross section defined between two flat surfaces.

2A and 2B show an embodiment of the way of mechanizing the side edges of panels 10 and 10 'where the inclined or chamfered side edges 40 and 40' are mechanized into panels. . The angle of inclination is chosen so as not to reduce the effective depth of the channels 2 and 2 'so that the spline 3 can fit deeply into each panel to maintain the mechanical connection. This parameter can be determined experimentally if necessary.

While the preferred embodiments of the invention have been described in more detail above, it is intended that many variations and / or variations of the basic inventive concepts apparent to those skilled in the art are within the spirit and scope of the invention as defined in the appended claims. I understand clearly.

Example 1

HMWPE510098.72 Weight%

Calcium Stearate0.25 wt%

Tinuvin111FDL0.50 wt%

Irganox B2 250.10 wt%

Titanium Dioxide (TiO2) 0.33 wt%

Anti-Stat (ATMER129) 0.10 wt%

Example 2

HMWPE510098.400 wt%

Calcium Stearate 0.280 wt%

Tinuvin111FDL0.480 wt%

Irganox B225 0.095 wt%

RCL-4 (C-1701) 0.650 wt%

Anti-Stat (ATMER129) 0.095 wt%

Example 3

HMWPE510098.42 Weight%

Calcium Stearate0.27 wt%

Tinuvin111FDL0.50 wt%

Irganox B2 250.10 wt%

Titanium Dioxide (TiO2) 0.61 wt%

Anti-Stat (ATMER129) 0.10 wt%

Example 4

HMWPE510098.42 Weight%

Calcium Stearate0.31 wt%

Tinuvin111FDL0.50 wt%

Irganox B2 250.10 wt%

Titanium Dioxide (TiO2) 0.72 wt%

Anti-Stat (ATMER129) 0.10 wt%

Comparative Example 1

HMWPE510098.83 Weight%

Calcium Stearate0.10 wt%

Tinuvin111FDL0.50 wt%

Irganox B2 250.10 wt%

Titanium Dioxide (TiO2) 0.33 wt%

Anti-Stat (ATMER129) 0.10 wt%

Optical bleach (UVITEX OB) 0.022 wt%

Blue and purple pigments (marine blue) 0.017 wt%

In the case of the conventional resin composition (comparative example), the smoothness over the entire area is not uniformly maintained during extrusion, so that the thickness difference with the adjacent panel is generated during the joining (comparative example 2.26mm compared to the average of 1.35mm) The skating feeling was not comfortable, and the lack of lubricity caused obstacles to increase the speed, and especially when used outdoors for more than one year, the roughness of the surface was higher than that of the resin compositions of the present invention (Examples 1, 2, 3, and 4). It is very large and shows a problem in durability.

The resin composition of the present invention can be used in a divided panel having a low friction as an ice skating surface. Contrary to conventional ideas and predictions, plastic grooved links using the resin composition of the present invention, which rely only on frictional engagement between flat plastic surfaces of the same plane height with respect to each other, have no rougher surfaces, such as wood, included in the design. If not, the panels remain adequate and complete during ice skating applications, despite being a relatively smooth plastic component. Synthetic ice skating links using the resin composition of the present invention are more efficient than prior art designs because they avoid buckling problems by easier design related to spline and panel frictional engagement without the need for intervening mechanically interlocked parts in three dimensions. Surely excellent.

In addition, conventional ice skates can be used to skate on the surface of the present invention. The surface can simulate the slidability of the natural ice while eliminating the high initial installation costs required when using the natural ice as a skating surface, the excessive energy requirements associated with the management of the natural ice without daily maintenance or cooling.

In addition, the structure using the resin composition of the present invention skates on it more easily than natural ice because of the constant 90% sliding factor and the surface without the actual channel.

Also, because you don't need to cool the surface, you can skate "safe than wet ice", so you have less muscle strain and fatigue than skating on natural wet ice. Primarily teachers can teach at long intervals and watch over students, so students can learn skating from leaders faster and in less time. Conventional steel blade skates can be used on the artificial ice skating surface of the present invention without the need for modification. The downtime required to refinish the skating surface, to manage only the empty surface after the closing time of the link, to clean the surface once or twice a month and to periodically apply the friction reducing component is significantly reduced.

The artificial ice skating link using the resin composition of the present invention is quick and easy to install without the need for piping or cooling when used on the skating surface and can be used for one year and twelve months. Costly, no harmful cooling gases are needed. The composite structure using the resin composition of the present invention is antimicrobial, nonflammable and nontoxic. It can be installed on any rigid substrate surface or flooring and can be installed in a portable or permanent manner.

Links using the resin composition of the present invention can be easily assembled to a stable skating surface without the need for an outer cushion layer or without panel attachment equipment such as glue, nails, pins, straps or adhesive tapes. In addition, the panel using the resin composition of the present invention does not need to be formed with a complicated mechanical interlock structure at the side edges. The skating surface of the invention can also be assembled without the use of wood, glue or laminated composite panels.

In addition, the resin composition of the present invention, when manufactured by extrusion, the difference in the thickness of the panel joints due to the smoothness of the surface is minute, even when used outdoors for a long time, the surface does not become rough to maintain smooth slipping of the skate and comfortable skating To make it possible.

In addition, the resin composition of the present invention can satisfy performance conditions such as permanence suitable for skating, stability, low wear, low water absorption, low surface friction, and high surface maintainability.

The friction reducing structure using the resin composition of the present invention can be used for other applications than skating links that require low friction surfacer with similar advantages.

Claims (7)

First panel means for providing an ice skating surface having an elongated first channel having a longitudinal axis and a transverse axis disposed therein; Second panel means for providing an ice skating surface having a second channel having a longitudinal axis and a transverse axis; And Slidingly inserted into the first channel along the transverse axis of the first channel in the first side direction and slidingly engaged to the second channel when the second panel means is slidably engaged with the spline to receive the force in the lateral direction. A resin composition for a panel for an artificial skating link, wherein said first panel means and said second panel means are entirely supported by said spline means for relative movement along said transverse axis. In The composition is 97.00 to 99.50 parts by weight of high molecular weight polyethylene, 0.20 to 0.80 parts by weight of hydrophobic component, 0.09 to 0.65 parts by weight of UV stabilizer, 0.09 to 0.20 parts by weight of antioxidant, 0.10 to 1.20 parts by weight of titanium dioxide and 0.02 to antistatic component A resin composition comprising 0.15 parts by weight, but does not include other colorants and optical bleaches. 2. The fatty acid ester of claim 1 wherein the hydrophobic component is a fatty acid or an alkaline earth metal selected from the group consisting of calcium stearate, calcium palmitate, magnesium stearate, magnesium palmitate, stearic acid and palmitic acid. Resin composition made into. The resin composition according to claim 2, wherein the hydrophobic component is calcium stearate. The method of claim 1 wherein the ultraviolet light stabilizer is 2-alkyl- (2-hydroxyphenyl) -2H-benzotriazole, benzophenone triazine, phosphonate, resorcinol monobenzoate, bis (2, 2,6,6-tetramethyl-4-piperidinyl) sebacate, 2- (2 "-hydroxy-3 ', 5'-di-tert-amylphenyl) benzotriazole Resin composition made into. The method of claim 1 wherein the antioxidant is selected from the group consisting of butylhydroxytoluene, butylated hydroxyanisole, and octodecyl 3,5-di-tert-butyl-4-hydroxyhydrocinnamate. Resin composition, characterized in that. The resin composition according to claim 1, wherein the antistatic component is selected from the group consisting of glycerol, glyceryl monooleate, glyceryl monostearate, glycerol esters, ethyl monostearate and glycerides. 7. The resin composition according to claim 6, wherein the antistatic component is glycerol or glycerol ester.