KR20100086649A - Floor mat for saltpan and manufacturing method thereof - Google Patents

Abstract

PURPOSE: A saltpans mat and a manufacturing method thereof are provided to prevent the discharge of harmful components including the environment hormone from the mat by manufacturing an upper limb part with a non-toxic material. CONSTITUTION: A saltpans mat to be installed at a saltpan comprises the following: a base layer(10) mainly formed with a polyvinyl chloride resin to prevent the mixing between salt water and foreign materials from the ground; a balance layer(20) attached to the lower side of the base layer; and an upper limb part(30) formed with a polyethylene terephthalate glycol resin. The base layer includes 5~10 parts of stabilizer by weight, and 25~35 parts of plasticizer by weight.

Description

Salt mat for saltpan and manufacturing method

The present invention relates to a salt mat and a method of manufacturing the same, and more particularly, it is possible to stably rest on the bottom surface of the salt crystal crystal paper, but also excellent in the flatness of the surface can be easily made to scrape the salt with a rubber bar to collect The present invention relates to a salt mat and a method of manufacturing the same.

Salt is also commonly referred to as salt, and the chemical name is sodium chloride (NaCl), which is widely used in daily life such as coarse salt and salt salt, and is also used in a large amount in industrial fields such as the production of soda (sodium carbonate).

Salt is a cube with a specific gravity of 2.16. 35.7g at 0 ° C, 35.8g at 20 ° C, and 39.8g at 100 ° C are dissolved in 100g of water.Saturated salt solution does not freeze to -21.2 ° C due to the freezing point drop. For most microorganisms except basophils, they show antiseptic and sterilization at high concentrations, osmotic and dehydrating, determine the osmotic pressure of various somatic cells, enable the movement of body fluids, and dissolve body proteins. In addition to determining its three-dimensional structure, it is an essential body component essential for the maintenance of life, such as generating a potential difference for signal transmission in nerve cells.

Sources of salts include seawater, rock salt, salt lakes, underground functions, and the like, and may be classified into sun salt, rock salt, mechanical salt, recontaminated salt, and processed salt. About two-thirds of the world's salt production comes from rock salt, but the traditional salt in Korea is sun salt.

Natural salt (NaCl 80 ~ 85; Ca 0.2; Mg 0.5 ~ 1.0; SO₄1.0 ~ 1.5; K 0.1 ~ 0.17; Moisture 8 ~ 12) is seawater (sodium chloride (NaCl): 27.21g / kg; magnesium chloride (MgCl₂): 3.81 g / kg; magnesium sulfate (MgSO2): 1.66 g / kg; calcium sulfate (CaSO₄): 1.26 g / kg; calcium carbonate (CaCO₃): 0.12 g / kg; potassium sulfate (K2SO₄): 0.86 g / kg; brominated Magnesium (MgBr₂): 0.08g / ㎏; total: 35.00 ‰ (permill)) is a salt made by introducing seawater by using natural forces such as solar and wind. The salinity of sun salt is generally around 90% and the color is white and transparent, but Korea has a whiteness of about 80 ~ 85% of salinity due to weather conditions.

Determination of sun salt field to collect these salts includes rust generated from the infrastructure for dyeing, debris of thermal insulation cover, sand grains, pests, foreign substances such as plants, in the tidal flats of the shores and reservoirs of tidal flats. Insoluble matter and contaminants of contaminated seawater are mixed in the ground.In order to prevent the foreign substances from mixing with seawater or salt collected for dyeing, a mat made of PVC or the like is used as a floor finishing member. It is used by covering the ground of crystal paper. In other words, the mat is installed on the salt floor and salt is slowly evaporated by using geothermal heat, solar heat, natural wind, etc. coming from the tidal flat, and the prepared salt is collected by using a rubber bar.

However, the conventional mat is simply made of PVC resin, so there is a risk of generating an environmental regulation material, there is a problem that its use is reluctant in recent years.

The present invention is to solve the above problems, the object of the present invention is to provide a salt mat and a method of manufacturing the same to prevent the discharge of environmentally regulated substances while giving a high strength, high elasticity so that the dyeing operation can proceed smoothly will be.

In order to solve the above problems, the base layer based on the PVC resin to block the mixing between seawater and foreign matter in the ground; A balance layer based on PVC resin bonded to the lower side of the base layer; There is provided a salt mat including an upper layer of PETG resin provided on the upper side of the base layer.

The above-described salt mat is a base layer forming step of pulverizing the PVC resin to powder and then blended and extruded with a stabilizer and a plasticizer; A balance layer forming step of pulverizing and pulverizing the PVC resin and blending and extruding it with a stabilizer, a plasticizer, and bicarbonate; Laminating step of adhering the base layer and the balance layer; A cooling step of cooling the bonded base layer and the balance layer; It is prepared by a manufacturing method comprising the upper layer forming step of forming a PETG resin layer on the upper side of the base layer.

According to the present invention, by manufacturing the upper limbs from a non-toxic material, harmful substances such as environmental hormones are not discharged, and thus salts suitable as raw material salts of food materials can be salted.

In addition, by smoothly finishing the surface to further reduce the friction with the rubber and salt crystals, the precipitation of salt can be made even, and the friction with the rubber can be minimized can be made smoothly.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the salt toner mat according to the present invention.

As shown in FIG. 1, the salt mat of the present invention includes a base layer 10, a balance layer 20 attached to a lower side of the base layer 10, and an upper limb layer 30 attached to an upper side of the base layer. It includes.

The base layer 10 is a material capable of blocking foreign matters from seawater and the ground, for example, polyvinyl chloride (PVC) resin which is advantageous in applicability and economical efficiency among synthetic resin materials. The base layer 10 is manufactured in the form of a strip having a flat top surface and a long thin cross-sectional shape, and has a relatively black color to effectively absorb solar heat.

The base layer 10 is a plasticizer, a stabilizer and a filler are added to the PVC resin. At this time, 5-15 weight part of stabilizers, 25-35 weight part of plasticizers, and 10-20 weight part of heavy coals are added with respect to 100 weight part of PVC base materials.

PVC resins, even homopolymers, vary in properties depending on their molecular weight. The polymerization is carried out using a peroxide and an azo acid catalyst, but also polymerization by irradiation of light and alpha rays. There are two types of polymerization methods: emulsification polymerization and suspension polymerization. The heat of polymerization is dispersed by dispersing vinyl chloride in water.

The polymer is markedly low in crystallinity, decomposed by light and heat, and colored yellow or brown, and deteriorates in its gaseous properties. For this reason, it is necessary to mix | blend a stabilizer. That is, since the PVC resin has a similar processing temperature and thermal decomposition temperature, thermal decomposition mainly on the dehydrochlorination reaction proceeds at the time of processing, coloring by double bond, etc. occurs, and the appearance of the product may be damaged. In addition, the damaged part of the polymer is deteriorated by the action of light and oxygen when using the product, and lowers the durability of the product. Thus, stabilizers are used for the purpose of preventing damage to the PVC resin during processing to improve processability and to prevent degradation of the product. Stabilizers have many actions such as neutralization of the generated hydrochloric acid, inhibition of degradation by substitution with weakly bound chlorine, and prevention of formation of long chain polyene chromophores by trapping of the generated radicals. Stabilizers include Pb (lead), Ba-Cd (barium-cadmium), Ba-Zn (barium-zinc) and Ca-Zn (calcium-zinc). Instead of Pb (lead) and Cd (cadmium), it is preferable to use Ba-Zn (barium-zinc) or Ca-Zn (calcium-zinc).

In addition, PVC resin alone is relatively hard and brittle, but elasticity can be imparted by adding a plasticizer. That is, in order to improve the flexibility and processability of the polymer, various additives are used. In the case of PVC resin, it is a hard and fragile glassy material at room temperature, but by adding a plasticizer therein, it is easy to mold and reduce the melting temperature and melt viscosity. Becomes Such plasticizers are classified into phthalic acid, epoxy, polyester, and the like by molecular structures according to chemical structures, and phthalic acid-based DOP (di-octyl-phthalate) having excellent compatibility with polyvinyl chloride is preferably applied. Do.

When the mat is manufactured based on PVC resin to be installed in the salt, thermal expansion may occur by solar heat, wherein the filler is to control the degree of thermal expansion of the mat by solar heat.

Filler refers to pulverized powder added to liquids, semi-solids, and solids in order to change the properties of aid and reduce costs. Therefore, the particle structure of the filler generally varies from irregular shapes to spheres and polyhedrons. Fillers may additionally impart any composition or opacity. In the present invention, as a filler, calcium carbonate, in particular, bicarbonate is applied.

Heavy coal is heavy calcium carbonate prepared by pulverizing and classifying high purity crystalline limestone with high whiteness, and is distinguished from chemically made hard coal (hard calcium carbonate).

PVC resin can be used by changing the characteristics according to the amount of reinforcing agent or filler, rather than manufactured alone, these fillers must meet the conditions that the quality must be constant, stable supply and low price. Heavy carbon of several to several tens of micrometers is a filler that satisfies these conditions, and can give a relatively heavy feeling and obtain a product having high resilience. In addition, heavy carbon can be given physical and chemical uses such as improving the heat deformation temperature, preventing shrinkage, high elasticity, and suppressing combustion.

The balance layer 20 provides a balance against external forces such as expansion or contraction by heat during adhesion between the base layer 10 and the upper limb layer 30 to be described later. Is applied. A plasticizer and a stabilizer are added to the balance layer 20, but 5-15 weight part of stabilizers and 25-35 weight part of plasticizers are added with respect to 100 weight part of PVC base materials. Since the stabilizer and the plasticizer added to the balance layer 20 are the same as the base layer 10, detailed description thereof will be omitted.

On the other hand, the filler does not need to be added to the balance layer 20. That is, when the balance layer 20 has a hardness corresponding to the base layer 10, the connection with the salt floor is not airtight and slippery, but the balance layer 20 is relatively relatively lower than the base layer 10. This is because, if manufactured softly, the finished salt toner mat can maintain a stable connection to the ground as a whole.

On the other hand, when the seawater supplied to the upper side of the salt mat is evaporated by solar heat and wind to precipitate salt crystals, the surface of the salt mat is scratched and stained using rubber rags, etc. At this time, the flatness of the salt mat should be excellent. Precipitation can be made evenly, the friction with the rubber can be minimized to prevent scratches and the like can be made smoothly. In addition, when using the salt mat of the present invention based on a PVC resin, there is a risk that environmental regulatory substances may occur, it should be prevented.

Accordingly, the upper layer 30 of the present invention is an environmental hormone-free material in the polymer (polymer) does not have a dangerous manufacturing process and does not generate harmful gases when incinerated, polyethylene terephthalate glycol (PETG: Polyethylene Terephthalate Glycol) meets these conditions.

In addition, the upper surface of the upper limb 30 is preferably further provided with a UV coating surface layer 40 to protect the upper limb layer (30). That is, when the surface layer 40 is formed on the upper surface of the upper limb layer 30, in collecting the salt by scraping the surface of the salt toner mat with rubber, the UV coating compared to the case where only the upper layer 30 of PETG resin exists By the surface layer 40 by the friction with the rubber and salt crystals can be further reduced can be made easier dyeing.

The manufacturing method of the salt toner mat configured as described above will be described with reference to FIG. 2.

The salt mat manufacturing method of the present invention includes a base layer forming step and a balance layer forming step. In addition, a laminating step of adhering the base layer 10 and the balance layer 20 to each other, and a cooling step of cooling the laminated sheet. And, the upper layer forming step of applying a PETG resin on the cooled sheet surface. In addition, the method further includes a surface coating step of forming a UV coating layer on the upper surface of the upper limb layer 30.

On the other hand, the base layer forming step and the balance layer forming step is to add a stabilizer, a plasticizer and / or a filler on the basis of the PVC resin, respectively, because both processes are similar, the base layer forming step will be described as an example.

The base layer forming step includes a process of pulverizing the raw material to a predetermined size, blending various additives into the pulverized raw material, mixing and mixing the raw material and additives appropriately, and extruding the kneaded raw material in the form of a sheet. do.

In the pulverization process, unused or already used but recyclable PVC resin is pulverized into a powder having a size of 1 to 2 cm using a pulverizer.

In the blending process, the balance layer 20 is prepared by blending a stabilizer, a plasticizer and a bicarbonate with the powdered PVC resin to form a base layer, and blending a stabilizer and a plasticizer with the powdered PVC resin. Proceed with preparation to form. At this time, it is preferable to proceed at a temperature of 80 ~ 100 ℃ in order to mix each material smoothly, for this reason, as already mentioned above, the PVC resin proceeds pyrolysis mainly on the dehydrochlorination reaction during processing Therefore, if the process temperature for the formulation is too high, there is a fear that each material is removed, and if the process temperature is too low, the formulation is not good.

In the mixing process, PVC resin and water blended into the hopper of the mixer are added and kneaded at a temperature of 180 to 220 ° C. to obtain a gel state.

In the extrusion process, two to four hollow extrusion rollers 1 are stacked and pressed between the rollers and the heat of steam sent in the rollers 1 during the passage of the gel material in sequence. Pressure is applied to extrude the sheet into a sheet having a predetermined thickness and width.

In the lamination step, the base layer 10 and the balance layer 20 having the same length and width are brought into close contact with each other, and the base layer 10 and the balance layer ( 20) are firmly fixed while being fused together. At this time, if the base layer 10 and the balance layer 20 can be sufficiently combined by the pressing force of the pressing roller, it can be simply implemented by passing the pressing roller, but between the base layer 10 and the balance layer 20 More preferably, the method of thermal fusion bonding the base layer 10 and the balance layer 20 by applying heat to the pressing roller so that the bonding is more firmly performed.

In the cooling step, when the lamination step is performed in a heat fusion method, the integrated compact is cooled by air or water cooling while freezing the connection portion between the heat-sealed base layer 10 and the balance layer 20.

In the upper limb layer forming step, the PETG resin melted and gelled on the surface of the base layer 10 integrally combined with the balance layer 20 through the lamination step is applied by the extrusion die 3 and then the pressing roller 5 Passing through to form an upper layer 30 of a predetermined thickness. Since the cooling process for the solid bonding process of the base layer 10 and the upper layer 30 is further included.

In the surface coating step, using a spray nozzle (4) or the like to form a UV coating film on the upper surface of the upper layer 30 made of PETG resin.

1 is a cross-sectional view showing a salt toner mat according to the present invention.

Figure 2 is a schematic diagram showing a manufacturing process of the salt toner mat according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10; Base layer 20; Balance layer

30; Upper strata 40; Surface layer

Claims (6)

In the salt field mat installed in the salt field crystal paper, A base layer based on polyvinyl chloride resin which prevents mixing between seawater and foreign matter on the ground; A balance layer based on polyvinyl chloride resin adhered to the lower side of the base layer; And a top layer of polyethylene terephthalate glycol resin provided on the base layer. The method according to claim 1, The base layer is a salt mat, characterized in that 5 to 10 parts by weight of stabilizer and 25 to 35 parts by weight of plasticizer are added to 100 parts by weight of polyvinyl chloride resin. The method according to claim 1 or 2, The salt layer is a salt mat, characterized in that 5 to 10 parts by weight of stabilizer, 25 to 35 parts by weight of plasticizer, and 10 to 20 parts by weight of heavy coal are added to 100 parts by weight of polyvinyl chloride resin. The method according to claim 1 or 2, Salt salt mat, characterized in that the upper surface of the upper layer is further provided with a surface layer that is UV coated to protect the upper layer. A base layer forming step of pulverizing and pulverizing the polyvinyl chloride resin, followed by mixing with a stabilizer and a plasticizer to extrude; A balance layer forming step of pulverizing and pulverizing the polyvinyl chloride resin and then blending and extruding it with a stabilizer, a plasticizer, and bicarbonate; Laminating the base layer and the balance layer by thermal fusion; A cooling step of cooling the bonded base layer and the balance layer; Method of manufacturing a salt mat, characterized in that it comprises a top layer forming step of applying a polyethylene terephthalate glycol resin layer in a gel state on top of the base layer. The method according to claim 5, Method of producing a salt mat, further comprising a surface coating step of forming a UV coating layer on the upper surface of the upper layer.

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