KR102411160B1 - Elastic sheet with improved anti-slip properties and performance and method for manufacturing the same - Google Patents

Abstract

The present invention relates to an elastic sheet and a method for manufacturing the same, and more particularly, to an elastic sheet for a sports facility and a method for manufacturing the same.
The present invention provides a rubber roll sheet for elastic flooring, comprising a thermoplastic elastomer, an olefinic thermoplastic resin, an oil, and a filler, wherein the filler comprises a high specific gravity filler and a low specific gravity filler.
According to the present invention, a new roll sheet for elastic flooring excellent in physical properties such as elasticity and strength was provided. And, according to the present invention, a new rubber roll sheet for elastic flooring excellent in tensile strength, slip resistance and elongation was provided.

Description

Elastic sheet with improved anti-slip properties and performance and method for manufacturing the same

The present invention relates to an elastic sheet and a method for manufacturing the same, and more particularly, to an elastic sheet for sports facilities and a method for manufacturing the same.

The outdoor sports facilities-elastic packaging specifications (KS F 3888-2) revised by the Industrial Standards Council stipulates the specifications of elastic packaging materials for everyday sports used in sports facilities such as public sports facilities, hiking trails, trails, parks, and schools. The types of elastic packaging materials for daily sports are divided into sheet-type elastic packaging materials, laying-type elastic packaging materials, urethane resin elastic packaging materials on laying, urethane resin elastic packaging materials on sheets, and urethane resin elastic packaging materials.

In addition, the sheet-type elastic packaging material is divided into a rubber powder sheet having a thickness of 5 mm or more and a rubber roll sheet manufactured by kneading a rubber component resin having a thickness of 10 mm or more (refer to KS F 3888-2: 2016). A rubber powder sheet is a product manufactured by putting a chip-type rubber such as polyurethane together with a binder in a plate-shaped mold and dipping. product.

Although these elastic packaging materials have good elasticity in nature, there is a problem in that it is difficult to avoid a decrease in strength due to this, so it is difficult to meet the high performance that combines the rigidity and elasticity required by the track or stadium.

In order to solve this problem, a method of adhering a functional layer on the elastic layer to multilayer it or improving the performance of the elastic layer is mainly used.

In the laying-type packaging material, one or more functional layers, for example, a functional layer, for example, an acrylic layer and/or a urea layer that can impart rigidity, slip properties, color, etc. As in Korean Patent No. 1009479 granted to Blue Garden Co., Ltd., a performance improvement method of installing a polyurethane chip containing heavy charcoal together with a binder is used.

In the case of a rubber sheet, a method of coating a resin with high rigidity on the surface of a rubber sheet manufactured using a mold is mainly used. As an example, Korean Patent No. 10-1996919 issued to Shinchang Urethane Co., Ltd. discloses a method of manufacturing a polyurethane sheet in a mold and demolding it, and then coating a functional polyurea layer.

In the case of a rubber roll sheet, a method of laminating a functional layer on an elastic layer and a method of improving the performance of the elastic layer are used to improve physical properties.

Korean Patent No. 10-1684468 granted to Daejong Co., Ltd. discloses a method of coating a polyurea layer on an elastic layer to improve physical properties. Presenting an elastic-urea composite sheet in which a urea layer is formed on the surface to improve physical properties in the production of elastic sheets manufactured using polyurethane, epoxy, recycled urethane, EPDM, PVC, and waste tires, which are drawn out at a constant speed A method of continuously coating a polyurea solution on a sheet and continuously drying it through a first dryer and a second dryer is disclosed.

In Korean Patent No. 1898716 granted to Plubber, a lower sheet containing synthetic rubber or natural rubber, charcoal, loess, diatomaceous earth and a deodorant, synthetic rubber or natural rubber, charcoal, loess, deodorant and PVC resin A method of vulcanizing the upper sheets to each other using a press is disclosed. It is used for flooring in sports facilities that require elasticity, such as athletics tracks, basketball courts, volleyball courts, and tennis courts, and polyester, sodium silicate, calcium silicate, molybdenum disulfide, and silane coupling agent are added to the lower sheet.

In No. 10-2014-0068610 filed by Kolon Glotech Co., Ltd., a thermoplastic elastomer (TPE) is extruded and foamed at a temperature of 150 to 250 ° C through a plate nozzle, molded into an extruded foam sheet, and then rolled and annealed. to start Thermoplastic elastomer (TPE) includes ThermoPlastic-Olefin (TPO), ThermoPlastic-Styrene (TPS), ThermoPlastic-Urethan (TPU), ThermoPlastic-PolyEster-Elastomer (ThermoPlastic-PolyEster-Elastomer). TPEE), and ThermoPlastic-PolyAmide (TPA). However, Korean Patent No. 10-1397590, granted to Kolon Glotech Co., Ltd., due to low slip resistance, discloses a method of separately extruding a sheet having high spike resistance, and then laminating it with a lower sheet.

An object to be solved in the present invention is to provide a new rubber roll sheet for elastic flooring excellent in tensile strength, slip resistance and elongation.

An object to be solved in the present invention is to provide a method for manufacturing a new rubber roll sheet for elastic flooring excellent in tensile strength, slip resistance and elongation.

Terms

In the present invention, the term 'high specific gravity filler' means a filler having a specific gravity of 0.5 or more greater than that of water, for example, a specific gravity of 2.0 or more, preferably 2.5 or more, for example, a filler having a specific gravity of 2.0 to 4.0. have.

In the present invention, the term 'low specific gravity filler' means a filler that is 0.1 or more smaller than water, for example, has a specific gravity of 0.9 or less, preferably 0.8 or less, for example, 0.2 to 0.75.

content of the invention

The present invention provides a rubber roll sheet for elastic flooring, comprising a thermoplastic elastomer, an olefinic thermoplastic resin, an oil, and a filler, wherein the filler comprises a high specific gravity filler and a low specific gravity filler.

The present invention in one aspect,

10 to 50% by weight of a thermoplastic elastomer, 10 to 50% by weight of an olefinic thermoplastic resin, 5 to 50% by weight of a filler, and 10 to 50% by weight of an oil, the filler comprising a high specific gravity filler and a low specific gravity filler Provided is a composition for manufacturing a rubber roll sheet for an elastic flooring material.

In another aspect, the present invention

10 to 50% by weight of a thermoplastic elastomer, 10 to 50% by weight of an olefinic thermoplastic resin, 5 to 50% by weight of a filler, and 10 to 50% by weight of an oil, the filler comprising a high specific gravity filler and a low specific gravity filler Provided is a method for manufacturing a rubber roll sheet for an elastic flooring material, characterized in that the composition for manufacturing an elastic flooring material is extruded.

In another aspect, the present invention

It provides an elastic floor surface comprising a rubber roll sheet for elastic flooring, comprising a thermoplastic elastomer, an olefin-based thermoplastic resin, oil, and a filler, wherein the filler comprises a high specific gravity filler and a low specific gravity filler.

In another aspect, the present invention

It provides a rubber roll sheet for an elastic flooring material, including a thermoplastic elastomer, an olefinic thermoplastic resin, an oil, and a filler, and having a specific gravity of 1.0 to 1.2.

Although not limited in theory, the combination of a low specific gravity filler and a high specific gravity filler is an imbalance in physical properties such as a decrease in tensile strength as a high specific gravity filler heavier than a resin is not evenly dispersed between layers during the manufacturing process and settles when a high specific gravity filler is used alone will prevent this from happening. In addition, the high specific gravity filler and the low specific gravity filler include the filler particles absorbing a lot of oil and the filler particles absorbing less oil because the absorption amount of oil, that is, the oil absorption amount of the filler is different. This can be formed to improve the slip resistance.

In the present invention, the thermoplastic elastomer may be made of a thermoplastic resin and at least a part of a rubber component that is dynamically vulcanized and dispersed in the thermoplastic resin.

In the practice of the present invention, the rubber component constituting the thermoplastic elastomer may be ethylene-propylene rubber, ethylene-propylene-diene rubber, natural rubber, butyl rubber, or p-alkylstyrene rubber, and the thermoplastic elastomer constituting the thermoplastic elastomer The resin may be selected from polyethylene, polypropylene, and ethylene-propylene copolymers.

In one embodiment of the present invention, the thermoplastic elastomer may be prepared by blending polyolefin and IPDM rubber to form pellets, and then dynamically vulcanizing the pellets with a phenol resin. During dynamic vulcanization, conventional additives such as a crosslinking activator, a crosslinking aid, a processing oil, and an antioxidant may be mixed and vulcanized. For its manufacturing method, reference may be made to manufacturing a thermoplastic elastomer by dynamically vulcanizing IPDM rubber and a polyolefin-based resin with a phenolic resin among the manufacturing methods of Korean Patent No. 0738282. In addition, in the practice of the present invention, the thermoplastic elastomer can be purchased and used commercially, and can be purchased and used from companies such as Kumho Polychem, LG Chemical, and Lotte Chemical.

In the present invention, the thermoplastic elastomer may be used in an amount of 10 to 50% by weight, preferably 15 to 40% by weight, more preferably 20 to 30% by weight. When the content of the thermoplastic elastomer is more than the above range, there is a problem in that the rigidity is lowered and the price is expensive. When the content of the thermoplastic elastomer is less than the above range, the elasticity of the sheet is lowered.

In the present invention, the thermoplastic polyolefin mainly imparts weather resistance and heat resistance to the elastic roll sheet, and as an auxiliary component that imparts moldability when molding into a sheet form, known polyolefin resins can be used without limitation, preferably commercially available. In consideration of price and availability, it may be polyethylene or polypropylene, and more preferably low-density polyethylene. The low density polyethylene preferably has a density in the range of 0.92 to 0.94, and a melt index of about 1 to 6 based on ASTM D1238 (g/10 min).

In the present invention, the thermoplastic olefin-based resin may be used in an amount of 10 to 50% by weight, preferably 15 to 40% by weight, more preferably 20 to 30% by weight. When the content of the thermoplastic olefin-based resin is greater than the above range, the rubber elasticity of the sheet is lowered and impact strength is lowered, and when the content of the thermoplastic olefin-based resin is less than the above range, the rigidity of the sheet is reduced.

In the present invention, the oil is used as a processing aid during sheet extrusion, and is used to preserve the rubber elasticity of the sheet after processing. In the practice of the present invention, the oil may be a process oil or a paraffin oil.

In the present invention, the oil may be used in the range of 10 to 50% by weight, preferably in the range of 15 to 45% by weight, more preferably in the range of 20 to 40% by weight. When the content of the oil is more than the above range, elasticity and rigidity of the sheet may be reduced, and if the content of the oil is less than the above range, it is difficult to extrude the sheet into the form of a sheet.

In the present invention, the filler including the high specific gravity filler and the low specific gravity filler is used to induce fine irregularities on the surface to increase the slip resistance, and to prevent an imbalance in physical properties due to the subsidence of the filler.

In the present invention, the filler may be used in the range of 5 to 35% by weight in the sheet, preferably in the range of 20 to 30% by weight. If the content of the filler is lower than the above range, the elasticity of the sheet becomes excessively strong, and if the content of the filler is higher than the above range, the sheet may be excessively hardened and break during continuous extrusion processing of the sheet.

In the present invention, the filler comprises 50% by weight or more, preferably 60% by weight or more, even more preferably 70% by weight, even more preferably 80% by weight or more of the high specific gravity filler and the low specific gravity filler, and , for example, may include 90% by weight, 95% by weight, or 100% by weight. In the practice of the present invention, the filler is less than 50% by weight, more preferably less than 40% by weight, even more preferably less than 30% by weight, even more preferably the filler having a specific gravity greater than 0.9 and less than 1.5. It may contain less than 20% by weight, for example, 10% by weight, 5% by weight or 0% by weight may be used, and as long as the physical properties of the rubber roll sheet are not reduced, conventional fillers can be used without limitation in the type. .

In the present invention, the high specific gravity filler is used to meet the physical properties of the outdoor sports facility-elastic packaging material specification by reinforcing the rigidity of the elastic sheet, and may preferably be an inorganic filler. The high specific gravity filler may be 10 to 80% by weight, preferably 20 to 70% by weight, more preferably 30 to 60% by weight in the content of the filler.

In the practice of the present invention, the high specific gravity filler may be talc. The talc has a high specific gravity and a low hardness (hardness) of about 1.0, and is used to prevent excessive elasticity degradation due to a high specific gravity filler, and may be commercially purchased and used. The particle size may be 100 μm or less, preferably 50 μm or less, and more preferably about 10 μm.

In the present invention, the low specific gravity filler is used for the anti-slip and anti-slip properties of the high specific gravity filler, and also can be used to prevent workability deterioration due to the heavy weight of the sheet. The low specific gravity filler may be 10 to 80% by weight, preferably 20 to 60% by weight, more preferably 25 to 40% by weight in the content of the filler. In the practice of the present invention, the low specific gravity filler may be a hollow filler made of silica, glass, perlite, and the like.

In the present invention, the filler has a high specific gravity and a low specific gravity, so that some of the fillers have a high specific specific gravity and the external specific gravity is a low specific gravity filler so as to reduce the separation phenomenon due to the difference in specific gravity between the high specific gravity filler and the low specific gravity filler. desirable.

In the practice of the present invention, the true specific gravity is high, and the apparent specific gravity is low specific gravity filler may be heavy coal. The heavy carbon acts as a reinforcing agent to increase the strength of the elastic roll sheet, and in consideration of compatibility with other components, processability, and moldability, the particle size is 100 μm or less, preferably 50 μm or less, and more preferably about 10 μm can be used. The ground calcium carbonate used in the present invention is preferably a commercial product provided in a purified form of marble, limestone, calcite, and clam shells in consideration of economic feasibility.

In a preferred embodiment of the present invention, in the high specific gravity filler, the ratio of heavy carbon and talc in the high specific gravity filler may be a weight ratio of 9:1 to 1:9.

In the present invention, the filler is preferably used in the range of 5 to 50 weight %, preferably 10 to 40 parts by weight, and more preferably 15 to 30 parts by weight in the thermoplastic elastomer. When the content of the filler is higher than the above range, the hardness may be excessively high and elasticity may be reduced. When the content of the filler is lower than the above range, the reinforcement effect of strength may be low.

In the present invention, the rubber roll sheet may further include a pigment.

In one embodiment of the present invention, the rubber roll sheet may be manufactured in a single layer, and may be extruded in a color or natural.

In one embodiment of the present invention, the rubber roll sheet may be extruded into a multi-layered rubber roll sheet. The lower portion of the multi-layer rubber roll sheet may further include an environmentally friendly component such as dry coffee grounds powder, and preferably may be used in an amount of 5 to 20 parts by weight based on 100 parts by weight of the rubber roll sheet composition.

In the practice of the present invention, when the rubber roll sheet composition is extruded as a single layer, it is molded to a width of 70 cm or more and a thickness of 10 mm or more while passing after and between rollers with an extruder having a T-die attached to the front end, and then cooled It may be wound in the form of a roll, and the roll may be 30 m or more, for example 50 m or more, 100 m or more.

In the practice of the present invention, when the rubber roll sheet composition is extruded in multiple layers, 10-50 wt% of a thermoplastic elastomer, 10-50 wt% of an olefinic thermoplastic resin, 5-50 wt% of a filler, and 10-50 wt% of an oil Is made of, the filler is a composition for producing an elastic flooring material comprising a high specific gravity filler and a low specific gravity filler is added to an auxiliary extruder, and 10 to 50% by weight of a thermoplastic elastomer and 10 to 50% by weight of an olefinic thermoplastic resin, and a filler 5 to It consists of 50% by weight and 10-50% by weight of oil, and the filler is mixed with 100 parts by weight of a composition for manufacturing an elastic flooring material containing a high specific gravity filler and a low specific gravity filler, and 5 to 20 parts by weight of the peeling residue powder is added to the main extruder. , it can be co-extruded so that the thickness of the upper layer is 5 to 10%.

During co-extrusion, a T-die is attached to the front end, and the extrudate passing through the T-die is passed between rollers and molded to a width of 70 cm or more and a thickness of 10 mm or more, and then cooled and wound in a roll form. may be 30 m or more, for example, 50 m or more, or 100 m or more.

The rubber roll sheet of the present invention may be unrolled, cut to an appropriate length in the field, and installed on a base layer to form an elastic bottom surface, and may be attached to the elastic bottom surface using an adhesive.

In the present invention, since the rubber roll sheet for elastic flooring has a short length of 30 m or more and a long length of 100 m or more, when the specific gravity becomes heavy, the total weight increases rapidly and the workability decreases. . Therefore, in order to prevent this, the total specific gravity is preferably in the range of 1.0 to 1.5, preferably in the range of 1.1 to 1.3.

According to the present invention, a new roll sheet for elastic flooring excellent in physical properties such as elasticity and strength was provided. And according to the present invention, a new rubber roll sheet for elastic flooring excellent in tensile strength, slip resistance and elongation was provided.

In addition, according to the present invention, a new method for manufacturing a rubber roll sheet for elastic flooring excellent in tensile strength, slip resistance and elongation is provided.

1 is a view showing a cross section of a rubber roll sheet for elastic flooring according to the present invention.
Figure 2 shows a cross-sectional TEM of Example 1 of the rubber roll sheet for elastic flooring according to the present invention.
Figure 3 shows a cross-sectional TEM of Comparative Example 1 of the rubber roll sheet for elastic flooring according to the present invention.
Figure 4 shows a cross-sectional TEM of Comparative Example 2 of the rubber roll sheet for elastic flooring according to the present invention.
5 shows sample photos of Example 1 (left), Comparative Example 1 (middle), and Comparative Example 2 (right) of the rubber roll sheet for elastic flooring according to the present invention.

Hereinafter, the present invention will be described in detail through examples. It should be noted that the following examples are not intended to limit the present invention, but to illustrate the present invention.

Example 1.

Thermoplastic elastomer with black color

The thermoplastic elastomer was according to the embodiment of Patent No. 7038282 of Kumho Petrochemical. EPDM rubber 176 (containing 75 phr oil), block polypropylem 40, processing oil 75, filler (clay) 40, zinc oxide 3, steeryl chloride 1, stearyl acid 1, oxide The inhibitor 0.5 and carbon black 1 were mixed to make a primary raw material, which was put into a Brabender mixer and blended for 3 minutes while controlling the temperature from 180° C. to 200° C. to make pellets.

The prepared pellets were subjected to a dynamic vulcanization reaction of secondary processing oil 15 and crosslinking agent (phenolic resin) 5 in a twin-screw extruder based on 100 phr of IPDM rubber to prepare pellet products. At this time, the secondary processing oil was added between the twin-screw extruder and blended until the oil was completely mixed with the composition and extruded again in the form of pellets.

The EPDM rubber is a product containing 75 phr of oil, has a specific gravity of 0.87 g/cm3, contains 45 parts by weight of ethylidene norbornene and 71 parts by weight of ethylene, and has a Mooney Viscosity of ML1+8 (120). ℃) at 62 (Kumho Polychem Co., Ltd. KEP-980) was used. Block polypropylene (Samsung Atopina Co., Ltd. BJ-100) was used as the polypropylene resin, the medium-viscosity polypropylene resin had MI=25, and the low-viscosity polypropylene resin was used as a standard product with MI=60. Halogenated phenolic resin and non-halogenated phenolic resin can be used as the phenolic resin, but in the present invention, a non-halogenated phenolic resin (product name: SP-1045) and a metal halide (stenier chloride) are used as a crosslinking activator.

Composition for sheet extrusion

The black color thermoplastic elastomer, linear low-density polyethylene (Hanwha Total 422F), process oil, heavy carbon, talc, and hollow filler ((Ju Seo-kyung CTM, MSD-1000 (effective specific gravity 0.75), coffee grounds dry powder (East-Seo) Food average particle diameter of 50 microns) was prepared by mixing using a super mixer according to the composition in Table 1.

Measurement of physical properties

A specimen for measuring physical properties was prepared using the composition for the upper sheet, and the physical properties were measured using this. The results are shown in Table 2.

In addition, the sheet specimen was cut to 30 cm x 30 cm x 10 mm (thickness) to measure the sliding properties of the surface. The results are shown in Table 2.

Examples 1 to 4 containing heavy charcoal, talc and hollow filler had excellent tensile and elongation properties and excellent anti-slip properties, and Example 5 containing coffee grounds had improved tensile and elongation properties, contrary to expectations, This is a different characteristic than expected, and it is expected that the coffee grounds absorb the oil and increase the compatibility of other ingredients.

division Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 3 thermoplastic elastomer 25 25 25 30 25 25 30 LLDPE 10 10 10 5 10 10 5 process oil 35 35 35 30 35 35 35 heavy charcoal 10 15 10 10 10 30 - talc 10 5 5 10 - - - hollow filler 10 10 15 15 10 - 30 coffee grounds - - - - 10 - - total 100 100 100 100 100 100 100

division Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Seal*1 1.9 1.85 1.93 1.80 1.7 0.9 0.90 Elongation*2 240 235 240 250 250 160 230 Hardness*3 41 42 40 40 43 36 37 Slip property*4 55 40 47 43 47 28 38 Specific gravity*5 1.03 1.03 1.03 1.02 1.04 1.05 0.91

1) Tensile strength KS F 3888-2: 2018: MPa

2) Elongation KS F 3888-2: 2018: %

3) Hardness: KS F 3888-2: 2018: Durometer Durometer Type A

4)Slip properties: Measure properties using KS F 3888-2 tester

5) Specific gravity: KS F 3888-2: 2018; Distilled water temperature 20 ℃, test method: suspending method in water

Example 1. Preparation of multilayer sheet

sheet manufacturing

An elastic roll sheet was extruded using an extruder for multi-layer sheets having a 70 pie main extruder and a 30 pie auxiliary extruder and a T-die attached to the front end. The composition for the lower sheet was added to the main extruder, and the composition for the upper sheet was added to the auxiliary extruder.

1, the upper layer 10 has a natural color at 30% of the thickness, and the lower layer 20 is made of a two-layer sheet having a black color at 70% of the thickness, and has a length of 100 m. It was prepared in the form of a roll. The total thickness was 10 mm, and the width was prepared to be 80 cm.

Claims (7)

Including a thermoplastic elastomer, an olefinic thermoplastic resin, an oil, and a filler,
The filler consists of 10 to 80% by weight of a high specific gravity filler having a specific gravity of 2.0 to 4.0 and 20 to 90% by weight of a low specific gravity filler having a specific gravity of 0.2 to 0.75,
Some of the high specific gravity fillers are fillers having a low surface specific gravity,
The rubber roll sheet has a sliding property of 40 to 55 based on KS F 3888-2,
The rubber roll sheet is a rubber roll sheet for an elastic floor, characterized in that it does not contain a foaming agent. According to claim 1,
A rubber roll sheet for elastic flooring, characterized in that it consists of 10-50 wt% of a thermoplastic elastomer, 10-50 wt% of an olefinic thermoplastic resin, 5-50 wt% of a filler, and 10-50 wt% of an oil. delete delete According to claim 1,
The high specific gravity filler is a rubber roll sheet for elastic flooring, characterized in that heavy carbon and talc are mixed in a weight ratio of 9:1 to 1:9. 6. The method of claim 1 or 5,
The low specific gravity filler is a rubber roll sheet for elastic flooring, characterized in that the hollow filler. an upper layer comprising a thermoplastic elastomer, an olefinic thermoplastic resin, oil, and a filler, wherein the filler includes a high specific gravity filler and a low specific gravity filler; and
It comprises a thermoplastic elastomer, an olefinic thermoplastic resin, oil, a filler, and coffee grounds, wherein the filler includes a lower layer comprising a high specific gravity filler and a low specific gravity filler;
The filler consists of 10 to 80% by weight of a high specific gravity filler having a specific gravity of 2.0 to 4.0 and 20 to 90% by weight of a low specific gravity filler having a specific gravity of 0.2 to 0.75,
Some of the high specific gravity fillers are fillers having a low surface specific gravity,
The rubber roll sheet has a sliding property of 40 to 55 based on KS F 3888-2,
The rubber roll sheet is a multilayer rubber roll sheet for elastic flooring, characterized in that it does not contain a foaming agent.

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