KR20110130229A - Eco-friendly floor sheet for salt plant - Google Patents

Abstract

PURPOSE: An environment-friendly floor sheet for a saltpan is provided to prevent harm to an enviroment by preventing the exhaustion of a phthalate compound which is harmful to a human body. CONSTITUTION: An upper layer(10) and an underlying layer(20) are spread under the floor of a saltpan and are attached. The upper layer is manufactured by including a polyethylene PET(Polyethylene Terephthalate) or a PETG(Polyethylene Terephthalate Glycol) resin. The specific gravity of the upper layer is 1.20-1.35. The working temperature of the upper layer is 230-265°C. The underlying layer is made of a TPU(Thermo Plastics Poly-Urethane) resin or a TPO(Thermo Plastics Poly-Olefin) resin with reinforced ductility.

Description

Eco-Friendly Salt Flat Plate {ECO-FRIENDLY FLOOR SHEET FOR SALT PLANT}

The present invention relates to an eco-friendly salt plate, more specifically, superior to PVC salt plate and can not only prevent harmful problems by releasing phthalate compounds harmful to human body, as well as significantly improved durability than olefin series salt plate. It is related to the eco-friendly salt field plate which can naturally block the phenomenon of wave, slip, seating, durability, sun salt quality, production, and harmfulness of salt salt plate, because of the superior upper layer blackness.

Salt is widely known as a seasoning that is used for seasoning function in general foods because its main ingredient is sodium chloride, and is used for various purposes such as food storage and raw material of chemical industry.

In order to manufacture these salts, seawater, rock salt, and hydride are used as basic raw materials, and according to the source of manufacture, it is divided into sun salt, rock salt, processed salt, etc., and the largest proportion of salt production is rock salt or in Korea. Traditionally, sun salt has been widely produced.

Solar salt refers to the raw coarse, semi-transparent hexagonal salt made by introducing seawater into the salt reservoir, and evaporating harmful components along with moisture by wind and sunlight. It is widely produced on the big west and south coasts.

Domestic salt salt in Korea consists mainly of reservoir, evaporation and crystallization. At high tide, the hydrology is opened to evaporate from the evaporation to make concentrated brine and send it to crystallization to get salt crystals.

The decisive point of the Sunil Salt Field includes rust generated from the infrastructure for dyeing, debris of thermal cover, sand grains, pests, foreign substances such as plants, insoluble matters from coastal tidal flats and reservoir tidal flats and polluted seawater. In order to prevent mixing into the ground, the ground of the crystal paper is covered with a floor finishing member such as plastic sheet, tile, or pottery.

When the seawater supplied to the floor finishing member of the salt field is evaporated by solar heat and wind to precipitate salt crystals, the surface of the floor finishing member is scratched and stained using a rubber rag, and the flatness of the floor finishing member should be excellent. Precipitation of the salt can be made evenly, and the friction with the rubber can be minimized, so that the dyeing can be made smoothly.

Tiles and pottery used as floor finishing materials have excellent flatness, but they are easily broken due to their high impact resistance and abrasion resistance, and it takes considerable time and labor cost to replace the broken tiles. The salt field floor which was made is used.

PVC floorboard widely used in the crystallization of salt field is a plastic material widely used in life because of its low price and excellent chemical resistance. PVC products add a large amount of plasticizers (primarily phthalate compounds) to improve their elasticity and adhesion, which are presumably endocrine disruptors. In most countries of Europe and Korea, food hygiene law instruments and container packaging prohibit the use of DOP in the manufacture of food utensils and container packaging according to the standard, and DEHA as well as DEHA should not be used in the manufacture of wraps.

At present, there are few discussions on the adequacy and non-compliance of PVC materials. As the Salt Management Act was transferred to the Ministry of Food, Agriculture, Forestry and Fisheries in March 2009, there will be inventory of facility specifications including salt field cardboard. Therefore, although there are no regulations on DOP, etc. in the finished product standard for sea salt, there is a concern that the chemical salts may be included in the salt produced in the PVC flooring material for salt. There is a situation.

On the other hand, in the case of general PVC salt plate, when the upper and lower layers are laminated due to the wrong temperature condition, when the salt plate is installed in the salt battery, the additives move to the surface of the plate. The surface of the ledge is roughened so that the rubber sheet is hardly pushed and adversely affects the durability of the ledge. In this way, the appearance of the rug on the salt plate has a bad effect on the quality, yield, workability of the salt, and durability of the plate.

In particular, the plasticizer added to improve the elasticity of PVC products bleeds into the upper layer as time passes, displacing the disgusting odor of chemicals (plasticizers), not only salt plates but also salt, which degrades the taste of food. .

In addition, natural salts are salt crystals are precipitated as the seawater supplied to the salt field plate is purified and evaporated by solar heat and wind. In the case of the conventional PVC salt plate, the plate is often convex when the external temperature rises above 20 ° C. The phenomenon of so-called wave (phenomena) and dimensional deformation occurs, and the crystallization process is interrupted due to the stagnation of the seawater, resulting in the precipitation of nigari salt (small salt crystals and tasteless crystals) in which the salt quality is remarkably degraded. Salt production is also significantly reduced due to the precipitation of nigari salt. In addition, when the wave phenomenon occurs, the flatness of the salt flat plate is remarkably decreased, so that the dyeing is not smoothly performed, and the frictional index with the rubber bar is high, and the life of the salt flat plate is reduced by impact resistance and abrasion resistance.

As the problems of PVC salt plate is emerging as mentioned above, olefin-based plastics known to have excellent chemical resistance, and are widely used as eco-friendly materials such as packaging materials and food containers as in Korea Patent Registration No. 10-0921445. Development of eco-friendly salt field flooring of materials is being made.

However, in the case of olefin-based plastic salt plates, soft segments (Rubber: EPDM, SBS, SEBS, etc.) are blended with Hard Segment (olefin: PE and PP resin) to reinforce durability (scratch and mar). It has a disadvantage in that, in terms of durability (scratch and Mar), the resilience is poor compared to PVC products, and the durability is slightly weak.

In addition, olefin-based (PE and PP resin) resin is a crystalline resin, and thermal deformation (shrinkage and expansion) due to heat deformation is severely generated in midsummer, which causes a problem of significantly lowering production efficiency during dyeing. Thermal deformation (shrinkage) by inserting reinforcement layers [glass fiber, PE, PP, polyester, nylon, cotton, polyester cotton (T / C), polyester rayon (T / R), silk, hemp, etc.] between the sheets of the sheet And expansion) has been applied to reduce the resin deformation, but the cost is increased due to the reinforcing layer.

In addition, in the case of the olefin resin salt plate, the blackness (associated with salt output) is lower than that of the existing PVC plate due to the property of glossiness (transparency) which is a characteristic of the crystalline resin.

The present invention was conceived by recognizing the problems with the conventional salt plate as described above, the object of the present invention is superior to the PVC salt plate and can not block harmful problems inherently as it does not discharge phthalate compounds harmful to human body olefin Its durability is remarkably improved and its upper layer blackness is higher than the salt-based floor plate, which can increase the production of natural salts, and it can fundamentally block the wave phenomenon, slip property, durability, durability, the quality of natural salt, yield, and harmfulness of the salt plate. It is to provide eco-friendly salt plate.

In order to achieve the above object, the eco-friendly salt plate according to the present invention, in the salt plate of the upper layer and the ground layer laminated on the bottom of the salt field, the upper layer is manufactured by containing a PET resin or PETG resin, The underlying layer is characterized in that it is made of ductile reinforced TPU (Thermo Plastics PolyUrethane) resin or TPO (Thermo Plastics Poly Olefin) resin.

In addition, the eco-friendly salt plate according to the invention, the upper limb layer is characterized in that the PET resin or PETG 87 ~ 94% by weight, carbon black 6 ~ 12% by weight, additives: 0 to 1% by weight is formulated.

In addition, the eco-friendly salt plate according to the present invention, the upper layer has a specific gravity of 1.20 ~ 1.35, characterized in that the processing temperature of the upper layer is 230 ~ 265 ℃.

In addition, the environmentally friendly salt plate according to the present invention, the TPU (Thermo Plastics PolyUrethane) resin is TPU 50-95% by weight, Rubber-based resin 40-60% by weight, inorganic filler 30-60% by weight, carbon black 0.5-3.0% %, Lubricant 1.0-3.0% by weight, additives 0.5-6.0% by weight is prepared, the rubber-based resin is SBS (Styrene butadiene styrene), SEBS (Styrene Ethlene Buthylene Styrene), EPDM (Ethylene Propylene Di-Monomer, EPR At least one selected from (Ethyle Propylene Rubber) is a mixed resin, and the TPO (Thermo Plastics Poly Olefin) resin is 30-50% by weight of Olefin-based resin, 25-40% by weight of Rubber-based resin, and 25 ~ inorganic filler. 70% by weight, carbon black 1.0-4.0% by weight, lubricant 1.0-3.0% by weight, additives 0.5-6.0% by weight are prepared, the Olefin-based resin is PE or PP resin, the rubber-based resin is SBS (Styrene) butadiene styrene), SEBS (Styrene Ethlene Buthylene Styrene), EPDM (Ethylene Propylene Di-Monomer, EPR (Ethyle) At least one selected from propylene rubber) is a mixed resin.

In addition, the eco-friendly salt plate according to the invention, the specific gravity of the TPU resin and TPO resin is 1.3 ~ 1.8, the processing temperature of the TPU resin is 150 ~ 190 ℃, the processing temperature of the TPO resin is characterized in that the 180 ~ 200 ℃. It is done.

In addition, the eco-friendly salt plate according to the invention, the upper layer and the base layer 20 is characterized in that it is laminated at a processing temperature of 120 ~ 160 ℃.

According to the above configuration, the eco-friendly salt plate according to the present invention is superior to the PVC salt plate, and does not discharge harmful phthalate compounds to the body, thereby preventing harmful effects at the source as well as significantly improving durability than the olefin series salt plate. The superior blackness of the upper layer can increase the production of sun salt, and has the advantage of blocking the wave phenomenon, slip property, stability, durability, sun salt quality, yield, and harmfulness problems of salt plate.

1 is a cross-sectional view showing the structure of an eco-friendly salt field jangpan according to an embodiment of the present invention

Hereinafter, with reference to the drawings and the embodiment will be described in more detail the eco-friendly salt plate according to the present invention.

1 is a cross-sectional view showing the structure of an eco-friendly salt field jangpan according to an embodiment of the present invention.

Referring to FIG. 1, the eco-friendly salt field floor board according to an embodiment of the present invention is a salt-free bottom member for being installed on the ground of the salt crystal ground to prevent foreign matters from the crystal ground from being mixed in seawater or salt. It consists of (10) and the underlayer (20).

<Top layer preparation>

The upper layer 10 is made of polyethylene terephthalate (PET) resin or polyethylene terephthalate glycol (PETG) resin. The PET (A-PET) resin is a polyester resin obtained by polycondensing terephthal and terephthal and ethylene glycol. In addition, the PETG (G-PET) resin is an amorphous polyester resin obtained by adding CHDM (Cyclohexanedimethanol) to the PET resin. PETG resin prevents the crystallization of the resin compared to the A-PET resin to improve the blackness and adhesion of the salt field of the present invention, as well as excellent processability, impact resistance, chemical resistance and the like.

The upper limb layer is prepared by mixing 87-94% by weight of PET resin or PETG resin, 6-12% by weight of carbon black, and additives: 0-1% by weight, preferably 90% by weight of PET resin or PETG resin, carbon black 10 Formulated in weight percent.

The upper limb layer 10 made of PET resin or PETG resin has a specific gravity of 1.20 to 1.35 and a processing temperature of 230 to 265 ° C.

Meanwhile, the upper limb layer 10 made of the PET resin or the PETG resin is manufactured to a thickness of 50 to 200 μm at a processing temperature of 230 to 265 ° C. with a PET resin or a PETG resin by a T-Die method.

On the other hand, according to the present invention for the comparison with the upper resin layer (10) made of PET resin or PETG resin, the upper layer was prepared by the impact-resistant Acryl-based resin and PC resin, respectively, in the case of the impact-resistant Acryl-based resin PMMA ( Poly Methyl Meth Acrylate, Pellet) Resistant to 60 ~ 80 wt% resin Acryl Rubber [MMA (Methyl Meth Acrylate): 70 ~ 90 wt%, BA (Buthyl Acrylate): 5 ~ 25 wt%, SM (Slylene Monomer): 10 ~ 30% by weight, MA (Methyl Acrylate): 1-7% by weight] 20-40% by weight of Compound'G, carbon black: 1-3% by weight, lubricant: 0.2% by weight, heat stabilizer: 0.5% by weight, additive It is manufactured by mixing 0.3% by weight.

In the case of the PC (Poly Carbonate) resin, PC resin: 95% by weight, carbon black: 1-3% by weight, lubricant: 0.2% by weight, heat stabilizer: 0.5% by weight, additives: 0.3% by weight It is done.

Here, the specific gravity of the impact resistant acryl resin is 1.15 to 1.20, and the specific gravity of the PC resin is 1.18 to 1.22. Processing temperature is 220 ~ 260 ℃ for Acryl resin for impact resistance and 260 ~ 285 ℃ for PC resin.

Acryl-based resin is a PMMA (Poly Methyl Meth Acrylate, Pellet state) resin produced by film alone, the impact strength is not good, so even after a slight external impact, the crack is easily generated in the film can not be used as a saltproof flooring Acryl for impact Rubber [MMA (Methyl Meth Acrylate): 70 to 90% by weight, BA (Buthyl Acrylate): 5 to 25% by weight, SM (Slylene Monomer): 10 to 30% by weight, MA (Methyl Acrylate): 1 to 7% by weight] It is used as the upper layer of salt-filled sheet by blending to improve impact resistance of film.

Meanwhile, the upper limb layer 10 made of an acryl-based resin for impact resistance is an acryl-based resin for impact resistance by a T-Die method, which is manufactured to a thickness of 50 to 200 μm at a processing temperature of 220 to 260 ° C., and made of PC resin. The upper limb layer 10 is made of a PC resin by a T-Die method to a thickness of 50 to 200 μm at a processing temperature of 260 to 285 ° C.

<Base layer production>

The base layer 20 is made of TPU (Thermo Plastics PolyUrethane) resin or TPO (Thermo Plastics Poly Olefin) resin with ductility.

The TPU (Thermo Plastics PolyUrethane) resin is TPU 50 ~ 95% by weight, Rubber-based resin (SBS (Styrene butadiene styrene), SEBS (Styrene Ethlene Buthylene Styrene), EPDM (Ethylene Propylene Di-Monomer, EPR (Ethyle Propylene Rubber) any One or two or more resins] 40 to 60% by weight, inorganic filler 30 to 60% by weight, carbon black: 0.5 to 3.0% by weight, lubricant: 1.0 to 3.0% by weight, and additives: 0.5 to 6.0% by weight Are manufactured.

In addition, the TPO (Thermo Plastics Poly Olefin) resin is Olefin-based resin (PE or PP resin): 30-50% by weight, Rubber series [SBS (Styrene butadiene styrene), SEBS (Styrene Ethlene Buthylene Styrene), EPDM (Ethylene) Propylene Di-Monomer, EPR (Ethyle Propylene Rubber), or resin mixed with two or more]: 25 to 40% by weight, inorganic filler: 25 to 70% by weight, carbon black: 1.0 to 4.0% by weight, lubricant: 1.0 -3.0 weight% and an additive: 0.5-6.0 weight% are mix | blended and manufactured.

Here, the specific gravity of the TPU resin and the TPO resin reinforced with the ductility of the base layer 20 is 1.3 to 1.8.

The processing temperature is 150 ~ 190 ℃ for TPU resin with ductility and 180 ~ 200 ℃ for TPO resin.

Here, TPO (Thermo Plastic Olefin) is also called TPE (Thermo Plastic Elastomer), and uses PE (Poly Ethylene) or PP (poly Propylene), which is an Olefin-based resin that shows moldability and plastic properties in materials, and is elastic And rubber series (Styrene butadiene styrene (SBS), Styrene Ethlene Buthylene Styrene (SEBS), Ethylene Propylene Di-Monomer, EPDM (Ethylene Propylene Rubber) or two or more resins) Segment refers to a material that has elasticity and flexibility of rubber at room temperature and exhibits processability such as thermoplastic resin at high temperature.

More granularly, products that have undergone a dynamic crosslinking process may be distinguished by the term TPE or TPV (Thermo Plastic Vulcanizes).

The TPE material is manufactured using a reactive extrusion technique called Dynamic Vulcanized, and is made by selectively crosslinking rubber using a crosslinking agent in a molten state in an extruder.

TPE manufactured in this way does not require a vulcanization process, has high productivity, and can be recycled, compared to vulcanized rubber, and has a light weight, weather resistance, thermal integrity, and mechanical properties, and its field of application is rapidly increasing.

Inorganic fillers may be used in the form of needle-shaped inorganic particles having an average particle diameter of 10 μm or less, or talc, barium sulfate, calcium carbonate, or olastonite having an average particle size of 7 μm or less, but having an average particle diameter of 7 μm. It is preferable to use the following talc and calcium carbonate olastonite. These inorganic fillers contain acicular silica and other inorganic filler components in the range of 5 to 65% by weight in the total resin composition in a weight ratio of 100 to 10: 0 to 90.

In the TPO and TPU resin composition for salt splat according to the present invention, the content of the inorganic filler is 5 to 65% by weight of the total composition content. If the content is less than 5% by weight, the stiffness and heat resistance, flatness and seating properties are lowered, and if the content exceeds 65% by weight, calendar formability is lowered and poor adhesion occurs during post-processing.

The additives include 1 to 20% by weight of lubricant, 1 to 10% by weight of heat stabilizer and 1 to 10% by weight of other additives.

The lubricants include hydrocarbon lubricants such as paraffin wax, polyolefin wax, and polypropylene wax obtained by refining crude oil; Fatty acid amide lubricants such as steramid, oliamide, and erucamide; Ester lubricants such as butane stearate, gglycerol mono stearate, glycerin mono oleate, stearyl stearate and montan waxes reacted with montanic acid; Metal salt lubricants of stearic acid; Fatty acid lubricants such as stearic acid and lauryl acid; Or alcohol type lubricants such as cetyl alcohol and stearyl alcohol can be used alone or in combination. Particularly preferred are polyethylene wax produced by polymerization in polyolefin waxes, polypropylene wax polymerized by metallocene technology, and OP wax produced by reacting montanic acid, more preferably polyethylene wax produced by polymerization Montic acid OP wax is mixed and used. Polyethylene waxes and other waxes prepared by the decomposition method tend to increase roll contamination and stickiness with prolonged use. Polypropylene-based waxes prepared by polymerization or decomposition methods other than metallocene technology have excellent heat resistance, but when the viscosity of the wax is high, productivity may be reduced due to difficulty in molding.

The heat stabilizer may be used alone or in combination with a phenolic antioxidant, HALS (hindered amine light stabilizer) antioxidant or amine antioxidant. Preferred phenolic antioxidants include tetrakis [methylene-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] methane, tris (3,4-di-tert) -Butyl-4-hydroxybenzyl) isocylate, 1,3,5-trimethyl 2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene, 1,1 And 3 tris (2-methyl-4-hydroxy-5-tert-butyl-phenol) butane.

The other additives may be used alone or in combination with a metal deactivator, phosphorus or sulfur antioxidants, ultraviolet absorbers and the like. Preferably, a metal deactivator, a phosphorus antioxidant and a sulfur antioxidant are used in combination. In addition, the other additives may further include additives commonly used in the art. For example, it is an anti-inflammatory agent, a neutralizing agent, a nucleating agent, an antistatic agent, a slip agent, etc. They may also be included within the appropriate content ranges commonly used in the art.

In the additives, the lubricant, heat stabilizer, and other additives may be included in amounts of 1 to 20 wt%, 1 to 10 wt%, and 1 to 10 wt%, respectively. If the amount of lubricant is low, it is difficult to mold due to adhesion or roll contamination, and increases adhesion and plate-out with time. When the content of heat stabilizer and other additives is small, the stability decreases in the long-term molding due to the increase of adhesion with time.

The content of the additive is 0.3 to 3.0% by weight of the total composition content. If the content of the additive composition exceeds 3.0% by weight, there is a problem of deterioration in molding stability with time due to plate out of the composition. If the content of the additive composition is less than 0.3% by weight, there is a problem of roll surface contamination and adhesion problems and a decrease in molding stability with time.

The base layer 20 is made of a TPU resin reinforced by ductility or Calender method, 150-190 ° C., and TPO resin reinforced ductility is manufactured to a thickness of 800-1,500 μm at a processing temperature of 180-200 ° C. do.

<Upper layer and lower layer lamination>

The upper limb layer 10 and the lower layer 20 are laminated by a method of thermal lamination or adhesive (adhesion) lamination.

When the upper limb layer 10 is made of PETG resin, the lamination of the upper limb layer 10 and the lower layer 20 is suitable for thermal lamination by thermal fusion, and the processing temperature during thermal lamination is preferably 120 to 160 ° C. .

When the preheating temperature is lower than 120 ° C. when the upper layer 10 and the base layer are heat-sealed, poor adhesion (peeling) of the upper layer 10 and the lower layer 20 occurs, so that cracks may occur due to the interlayer peeling during the construction of the salt floor. In addition, the salt water is introduced between the upper layer (10) and the lower layer (20) due to the interlayer peeling during thermal fusion or adhesive construction on the bottom of the salt field, so that the yield of the natural salt and the quality of the salt are reduced, and the replacement time of the salt field plate is shortened. Have

In addition, when the preheating temperature is higher than 160 ° C., not only the appearance quality is reduced as the upper layer 10 shrinks, but also the waveability occurs in the salt plate where the upper layer 10 and the lower layer 20 are laminated. This falls, causing the problem that the sun salt production and the sun salt quality is degraded.

On the other hand, when the upper limb layer 10 is made of PET resin, the lamination of the upper limb layer 10 and the base layer 20 is laminated with an adhesive, or between the upper limb layer 10 and the lower layer 20, nonwoven fabric, PET Thermally adhesive resins such as PP, PE, nylon, cotton, T / C (Polyester / Cotton), T / R (Polyester / Rayon), silk, and hemp are interposed and laminated with thermal paper.

In addition, the upper layer of the Acryl-based resin and PC resin prepared for comparison with the present invention in which the upper limb layer 10 is formed of the PET resin or PETG resin according to the present invention is thermally laminated by thermal fusion like PETG resin. It is suitable and the processing temperature at the time of thermal lamination is preferably 120 ~ 160 ℃.

Example 1 Preparation of Salt Fragment

Polyvinyl Chloride (PVC) flooring was tested with commercially available PVC floorings (products sold by Chengdu and three revival Hyundai market, each control group 1,2,3). Jangpan was tested with Jangpan (Control Group 4) manufactured and sold by Sehwa Co., Ltd.

Eco-friendly salt plate according to the invention is prepared by mixing the upper limb layer with 90% by weight of PET resin or PETG resin, 10% by weight carbon black.

On the other hand, the sheet of acryl-based resin for comparison with the present invention is 70% by weight of PMMA (Poly Methyl Meth Acrylate, Pellet state) resin, impact resistant Acryl Rubber [MMA (Methyl Meth Acrylate): 75% by weight, BA (Buthyl Acrylate): 9% by weight, SM (Slylene Monomer): 11% by weight, MA (Methyl Acrylate): 5% by weight] 25% by weight, carbon black 3.5% by weight, lubricant 0.3% by weight, thermal stabilizer 0.5% by weight, other additives (antioxidants) ) 0.2 wt% of the product is manufactured and the sheet of PC (Poly Carbonate) resin is 95 wt% of PC resin, 3.5 wt% of carbon black, 0.3 wt% of lubricant, 0.5 wt% of heat stabilizer, and other additives (antioxidant). It is a product manufactured containing 0.2% by weight.

Example 2 Measurement of Natural Salt Production

To the salt of the size of 3.3㎡ was installed in the salt to compare the tiles of the control plates 1, 2, 3 in Example 1 (PVC sheet), Olefin-based eco-friendly plate of the control group 4 and jade jade material with the present invention, The floor was constructed with a floorboard of PET-based resin, which is an eco-friendly salt floorboard according to the present invention. Similarly, the floor was constructed with a floorboard of Acryl-based resin and a floorboard of PC resin. In each test group, 24 L of saline solution was added to 23 degrees of saline, and the next day, 16 L of additional water was added and evaporated, and the salt was collected.

Measure the amount of sun salt produced in each salt field with a scale and collect 500g sun salt, respectively, and measure the particle size as standard testing sieve (Cheonggye Sangsan, Seoul) with 4mm (No. 5) and 2.8mm ( No. 7), the size was separated by checking the size of 2.8mm or less.

As a result, as shown in Table 1 (compared to natural salt production according to crystallized flooring material) and Table 2 (compared to natural salt particle size according to crystallized flooring material), natural salt production was Acryl series resin> PET (PETG) resin = PC Resin> Olefin series resin> PVC resin> Cyanite Tile

As a result of the color difference test, the darker the contrast (the higher the blackness), the higher the amount of sun salt produced, and the PET-based resin sheet according to the present invention was also relatively dark.

In terms of the size of the salt particles, large particles of 4 mm or more were produced in the Acryl-based resin and the PC resin sheet, and the PET-based resin sheet according to the present invention, but most of the sapphire tiles were produced as small particles. there was. In general, since the coarse salt is good commerciality, it can be seen that the salt produced in the salt-only plate of the present invention can produce a natural salt having better commerciality than the conventional PVC plate.

division PVC floorboard
(Control 1, 2, 3) Olefin
(Control 4) Sapphire tile Acryl series board PC board PET (PETG) board Day1
Salinity 23 24ℓ 24ℓ 24ℓ 24ℓ 24ℓ 24ℓ Day
Thickening degree 27 16ℓ 16ℓ 16ℓ 16ℓ 16ℓ 16ℓ output 4.5 kg 4.7 kg 3.0 kg 4.9 kg 4.8 kg 4.8 kg Color difference (business card, ΔE) standard 1.94 - 2.19 2.09 1.80

Crystal size PVC floorboard
(Control 1, 2, 3) Olefin
(Control 4) Sapphire tile Acryl series board PC board PET (PETG) board 4mm or more 1.1 ± 0.1% 1.6 ± 0.0% 0 0.9 ± 0.1 1.0 ± 0.1 1.0 ± 0.1 4 ~ 2.8mm 22.7 ± 3.2% 26.5 ± 0.7% 16.9 ± 3.7% 28.3 ± 0.9 27.6 ± 1.5 27.5 ± 1.5 2.8mm or less 76.3 ± 3.3% 71.9 ± 0.7% 83.2 ± 3.7% 70.5 ± 0.9 71.7 ± 1.1 71.6 ± 1.2 Color difference (business card, E) standard 1.94 - 2.19 2.09 1.80

Example 3 Comparison of Natural Salt Components According to Salt Plates

The amount of Na, Mg, Ca, and K ions in each of the salts of the natural salts prepared in Example 2 was measured.

As a result, as shown in the following Table 3 (sun salt composition analysis according to the crystalline sheet plate material), it was found that there is no significant difference in the components of the sun salt obtained from each plate.

Item PVC floorboard
(Control 1, 2, 3) Olefin
(Control 4) Sapphire tile Acryl series board PC board PET (PETG) sheet Na 32.032 32.024 31.353 30.333 32.457 32.024 Mg 979 1,029 1,103 1,223 1,057 1,320 Ca 244 252 246 255 257 260 K 224 255 251 260 245 262

Example 4 Comparison of Hazards

As a result of analyzing the phthalate compounds (DEHP) harmful to the human body for each of the natural salts prepared in Example 2 of the natural salts, as shown in Table 4 (phthalate dissolution test according to the crystal sheet material) The phthalate compounds were not examined in the eluted test, Olefin-based boards, Acryl-based boards, PC resin boards, and sapphire tiles). (10) It can be seen that during the dyeing process, the plasticizer content of the additive is continuously detected as it wears out.

Item PVC floorboard
(Control 1, 2, 3) Olefin
(Control 4) Sapphire tile Acryl series board PC board PET (PETG) board DEHP
Elution 1 回 0.024 0.000 0.000 0.000 0.000 0.000 2 回 0.033 0.000 0.000 0.000 0.000 0.000 3 回 0.067 0.000 0.000 0.000 0.000 0.000

Example 5 Comparison of Natural Salt Odors in Salt Plates

For the natural salt of the natural salt prepared in Example 2, the intrinsic odor of the salt plate and the inherent smell of the additives added to prepare the salt plate may be transferred to the salt and degrade the taste of food. In the sensory evaluation as a standard test method (MS 300-34) of the odor for the polymer material mainly used as automotive interior materials as well as sensory test as well as the sensory test results, Table 5 (Odor test for crystallized sheet material) As described above, Olefin sheet, Acryl sheet, PC sheet and PET or PETG resin sheet according to the present invention were passed, but the PVC sheet was determined to fail (grade 4). This is because the plasticizer added to improve the elasticity of PVC floorboards bleeds into the upper layer over time, and the disgusting odor of chemicals (plasticizers), not only salt plates but also salts, can be displaced, resulting in deterioration of food taste. It is expected.

In particular, the PET or PETG resin sheet according to the present invention was found to have the best quality in the second grade.

Rating Degree of smell Evaluation standard Odor evaluation result Grade 1 No smell (odorless) pass Grade 2 I don't know what the smell is, but I feel the smell (smell detection) pass PET (PETG) Grade 3 The smell is weakly detected and what the smell is
Known (usually odor) pass Olefin Plate (Control 4)
Acryl series
-PC board Grade 4 Strong smell that can be easily detected
(Strong smell) fail PVC floorboard (controls 1, 2, 3) Grade 5 Very strong smell (extreme smell) fail Grade 6 An unbearable intense smell (an unbearable smell) to feel shortness of breath fail

Example 6 Comparison of Heavy Metals in Salt Plates

A heavy metal test was performed on each of the salt torsion plates used in Example 1 above. Table 6 summarizes the heavy metal test results. As a result of heavy metal dissolution test, all the existing PVC sheet met the heavy metal detection standard, but in the material test, the PVC sheet produced a large amount of lead and cadmium, and in the acryl series sheet, PC sheet and PET or PETG resin sheet according to the present invention, lead and cadmium It did not appear to be detected.

division Item unit Food Code
standard PVC floorboard
(Control 1, 2, 3) Acryl floorboard PC board PET (PETG) sheet Elution heavy metal mg / L 1.0 or less 1.0 or less 1.0 or less 1.0 or less 1.0 or less material
lead mg / Kg
100 or less 111-117 0 0 0 cadmium 100 or less 52-61 0 0 0

Example 7 Abrasion Test of Salt Plates

The abrasion test was performed on each of the salt toner plates used in Example 1 above. Table 7 summarizes the wear test results of the salt crystal sheets. In the abrasion test, the PET or PETG resin sheet according to the present invention obtained the same level of wear resistance as the PC sheet and the Acryl sheet, and the PET or PETG resin sheet according to the present invention was combined with the existing PVC sheet and PC sheet and Acryl sheet. The wear resistance was about 5 times better than that of Olefin sheet.

Specimen Type unit result TEST method Remark Existing PVC floorboard mg / loss 50 ASTM D3884 H-22, 1kg
1000 cycle Olefin Plate 50 PC board 10 Acyl floorboard 10 PET (PETG) sheet 10

The drawings and the ecological salt plate described above are only one embodiment for carrying out the present invention, and should not be construed as limiting the technical spirit of the present invention. The scope of protection of the present invention is defined only by the matters set forth in the claims below, and the embodiments which have been improved and changed without departing from the gist of the present invention will be apparent to those skilled in the art. It will be said to belong to the protection scope of the present invention.

10 upper strata
20 basement layers

Claims (6)

In the salt plate of the upper layer and the lower layer laminated on the bottom of the salt field,
The upper layer is prepared by containing a PET resin or PETG resin,
The base layer is an eco-friendly salt plate, characterized in that made of TPU (Thermo Plastics PolyUrethane) resin or TPO (Thermo Plastics Poly Olefin) resin reinforced ductility. The method of claim 1,
The upper layer is PET resin or PETG 87 ~ 94% by weight, carbon black 6 ~ 12% by weight, additives: 0 ~ 1% by weight of eco-friendly salt-proof board characterized in that it is prepared. The method of claim 2,
The upper layer has a specific gravity of 1.20 to 1.35,
The processing temperature of the upper layer is an environmentally friendly salt plate, characterized in that 230 ~ 265 ℃. The method according to any one of claims 1 to 3,
The TPU (Thermo Plastics PolyUrethane) resin is TPU 50 ~ 95% by weight, Rubber-based resin 40 ~ 60% by weight, inorganic filler 30-60% by weight, carbon black 0.5-3.0% by weight, lubricant 1.0-3.0% by weight, additive 0.5 ~ 6.0% by weight is prepared, wherein the rubber-based resin is at least one selected from SBS (Styrene butadiene styrene), SEBS (Styrene Ethlene Buthylene Styrene), EPDM (Ethylene Propylene Di-Monomer, EPR (Ethyle Propylene Rubber) Mixed resin,
The TPO (Thermo Plastics Poly Olefin) resin is 30 to 50% by weight of Olefin-based resin, 25 to 40% by weight of rubber-based resin, 25 to 70% by weight of inorganic filler, 1.0 to 4.0% by weight of carbon black, 1.0 to 3.0 lubricant It is prepared by mixing the weight%, 0.5 ~ 6.0% by weight of the additive, the Olefin-based resin is PE or PP resin, the rubber-based resin is SBS (Styrene butadiene styrene), SEBS (Styrene Ethlene Buthylene Styrene), EPDM (Ethylene Propylene) At least one selected from among Di-Monomer and EPR (Ethyle Propylene Rubber) is an eco-friendly salt plate. The method of claim 4, wherein
The specific gravity of the TPU resin and TPO resin is 1.3 ~ 1.8,
The processing temperature of the TPU resin is 150 ~ 190 ℃, the processing temperature of the TPO resin is 180 ~ 200 ℃ eco-friendly salt plate. The method of claim 5,
The upper layer and the base layer 20 is an eco-friendly salt plate, characterized in that laminated at a processing temperature of 120 ~ 160 ℃.

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