KR102146563B1 - PVC sheet And Preparing method thereof - Google Patents

Abstract

The present invention relates to a PVC sheet that can be used as an indoor finishing material and a method of manufacturing the same. More particularly, the present invention contains a PVC resin, a plasticizer, a stabilizer, a colorant, Al_2O_3 and Cu, and thus is resistant to friction, is resistant to scratches, and has excellent antibacterial activity against microorganisms and harmful bacteria. The PVC sheet of the present invention is particularly suitable as a finishing material for doors or windows of public institutions such as schools, where students with high activity and not fully formed immunity are the main users.

Description

PVC sheet having excellent abrasion resistance and antibacterial and deodorizing function, and manufacturing method thereof {PVC sheet And Preparing method thereof}

The present invention relates to a PVC sheet used as a finishing material for window frames, doors, walls, floors, etc. indoors and outdoors.

When processed wood is used for indoor or outdoor window frames, doors, or walls, polyvinyl chloride (PVC) sheets with wood grain printed as a finishing material are used as a finishing material to increase durability and give a solid wood feel. PVC sheet is used for various purposes such as finishing material, flooring material, wallpaper, etc. because it is inexpensive and convenient to use, but it is weak against water, heat, and friction, so its durability is low, and there is a problem that scratches are easily generated due to its thin surface.

In particular, public institutions such as schools have a large number of users, and the shoes racks, doors, and windows installed in schools are the main users, so they wear out more easily than ordinary homes and offices, reducing the replacement cycle and causing harmful bacteria to occur in scratched areas. As a result, children, students, and the elderly with weak immunity are exposed to danger.

In order to solve this problem, Korean Utility Model No. 20-0304659 introduces silver nanoparticles into a PVC sheet, and a technology for coating a solution in which silver nanoparticles having a particle diameter of 1-10 nm is dispersed on a PVC sheet is disclosed. have. However, in the aforementioned patent, silver nanoparticles are expensive, so they may cause an increase in the cost of the PVC sheet, and the interaction with the PVC resin is not strong, so mechanical properties are deteriorated, durability is weak, and abrasion resistance and scratch resistance are also insufficient.

It is to provide a PVC sheet that does not wear easily even with frequent friction, has excellent durability, scratch resistance, and strength, inhibits the growth of microorganisms and has excellent inert ability.

The PVC sheet usable as an indoor finishing material according to an aspect of the present invention includes a PVC resin, a plasticizer, a stabilizer, a colorant, Al ₂ O ₃ and Cu.

Based on 100 parts by weight of the PVC resin, Al ₂ O ₃ contains 12 to 18 parts by weight, Cu 12 to 18 parts by weight, 15 to 25 parts by weight of a plasticizer, 3 to 6 parts by weight of a stabilizer, and 0.1 to 2 parts by weight of a colorant.

The manufacturing method of the PVC sheet of the present invention is to obtain a PVC composition by putting PVC resin, plasticizer, stabilizer, colorant, Al ₂ O ₃ and Cu into a stirrer and stirring at 1000 to 1500 rpm for 3 to 15 minutes at 90 to 120 °C. Stirring step, the primary cooling step of cooling the obtained PVC composition to 30 ~ 50 ℃, melting step of melting the cooled PVC composition by heating it to 150 ~ 200 ℃, uniformly by stirring the melted PVC composition at 140 ~ 160 ℃ The first kneading step, the second kneading step in which the first kneaded PVC composition is stirred at 150 to 170°C, and the second kneading step in which the second kneaded PVC composition is filtered through a mesh net to remove impurities, The molding step of forming a PVC sheet by rolling and stretching the removed PVC composition, the embossing step of forming a pattern by passing the formed PVC sheet through an embossing device after drying, and the second cooling the PVC sheet that has passed through the embossing device at room temperature. And a cooling step.

The PVC sheet of the present invention has antimicrobial activity against microorganisms and harmful bacteria by adding plasticizers, stabilizers, colorants, Al ₂ O ₃ and Cu to the PVC resin, so as to withstand friction, scratch resistance, and antibacterial activity.

The PVC sheet of the present invention contains 12 to 18 parts by weight of Al ₂ O _{3 based} on 100 parts by weight of the PVC resin, so that the abrasion resistance and scratch resistance of the PVC sheet are improved and the flexibility is excellent.

The PVC sheet of the present invention contains 12 to 18 parts by weight of Cu based on 100 parts by weight of the PVC resin, so that it has antibacterial activity comparable to that of silver particles, and the antibacterial activity can be maintained even at high temperatures and high humidity.

By including 15 to 25 parts by weight of a plasticizer, 3 to 6 parts by weight of a stabilizer, and 0.1 to 2 parts by weight of a colorant based on 100 parts by weight of the PVC resin, the processability of the PVC resin is improved. can do.

A stirring step to obtain a PVC composition by adding PVC resin, plasticizer, stabilizer, colorant, Al ₂ O ₃ and Cu to a stirrer and stirring at 1000 to 1500 rpm for 3 to 15 minutes at 90 to 120 ℃, the PVC composition obtained from 30 to The first cooling step of cooling to 50 ℃, the melting step of melting the cooled PVC composition by heating it to 150 ~ 200 ℃, the first kneading step of homogenizing the molten PVC composition by stirring at 140 ~ 160 ℃, the first kneading The secondary kneading step in which the resulting PVC composition is stirred at 150 ~ 170 ℃ uniformly, the impurity removal step in which impurities are removed by filtering the secondary-kneaded PVC composition through a mesh network, and the PVC composition from which the impurities have been removed is rolled and stretched. Abrasion resistance and scratch resistance by including a molding step of forming a PVC sheet, an embossing step of forming a pattern by passing the formed PVC sheet through an embossing device after drying, and a secondary cooling step of cooling the PVC sheet that has passed through the embossing device at room temperature. It is possible to manufacture a PVC sheet with excellent properties and excellent antibacterial activity.

1 is a 600-fold enlarged photograph of a PVC sheet manufactured according to an aspect of the present invention.
2 is a flow chart of a method of manufacturing a PVC sheet according to an aspect of the present invention.

The present invention described below relates to a PVC sheet used as a finishing material for window frames, doors, walls, floors, etc. indoors and outdoors.

The PVC sheet according to the present invention contains a plasticizer, a stabilizer, a colorant, and Al ₂ O ₃ and Cu based on a PVC resin. Hereinafter, a composition consisting of a PVC resin, a plasticizer, a stabilizer, a colorant, and Al ₂ O ₃ and Cu is simply referred to as a “PVC composition”.

PVC resin is a thermoplastic plastic made of polyvinyl chloride and is one of the five general-purpose resins, and its usage is increasing every year due to its wide availability, excellent durability, and low price. However, there is a weak disadvantage in heat, and when it is pyrolyzed above 200 ℃, it releases HCl, a harmful substance. In the present invention, the PVC resin is subjected to high temperature and high pressure in the process of processing into a sheet and undergoes melting, so be careful not to be thermally decomposed.

The PVC resin used in the present invention preferably has a polymerization degree of 800 to 1200. If the degree of polymerization is less than 800, physical properties such as water resistance, acid resistance, and alkali resistance are lowered, and if the degree of polymerization is more than 1200, there is a problem that the processability is deteriorated. Therefore, the degree of polymerization is controlled by paying attention to the range suggested in the present invention.

Plasticizers are added to improve the processability of the PVC resin and to impart flexibility and elasticity so that the PVC resin can be processed below the decomposition point and molded into a sheet form. The plasticizer contained in the PVC sheet of the present invention is suitable as a general-purpose plasticizer and an eco-friendly plasticizer is preferable in consideration of price and physical properties. Examples of such plasticizers are DOTP (Dioctyl Terephthalate), DPHP (Di PropylHeptyl Phthalate), ESBO (epoxidized soybean oil; epoxidized soybean). oil). Since DOTP does not contain phthalate, it is not toxic, has excellent thermal stability, and is soluble in most organic solvents, so it is suitable for increasing the plasticity of the PVC resin according to the present invention that undergoes a printing process. ESBO is an epoxy plasticizer that has high compatibility with PVC resin and is derived from soybean oil and is also eco-friendly.

As a plasticizer used in the present invention, DOTP and ESBO can be mixed and used. The mixed plasticizer of DOTP and ESBO maintains flexibility and elasticity in the PVC composition, which may reduce processability by including Al ₂ O ₃ and Cu in the present invention, thereby facilitating handling during processing. The content ratio of DOTP and ESBO is 9 to 1, but it may vary depending on working temperature and humidity or other factors.

The content of the plasticizer contained in the PVC sheet of the present invention is preferably 15 to 25 parts by weight based on 100 parts by weight of the PVC resin. If the content of the plasticizer is less than 15 parts by weight, the PVC resin lacks flexibility, so the defect rate increases during the rolling and stretching process, and it is difficult to adjust to the desired sheet thickness.If it exceeds 25 parts by weight, it is a manufacturing step performed at high temperatures such as a kneading process or melting process Since harmful substances may be released, the content of the plasticizer is designed in consideration of the range suggested in the present invention.

The stabilizer removes HCl generated as the PVC resin is heated to suppress thermal decomposition of the PVC resin, thereby facilitating processing and protecting the manufactured PVC sheet from heat. In the present invention, Ba-Zn-based stabilizers are used as thermal stabilizers, and examples thereof include Bz 184T and Bp 276S. The content of the stabilizer contained in the PVC sheet of the present invention is preferably 3 to 6 parts by weight based on 100 parts by weight of the PVC resin, and if the content is less than 3 parts by weight, HCl generated in the manufacturing process is not completely removed and It can be released and pose a hazard and pyrolysis of the PVC resin can occur. If the content of the stabilizer is more than 6 parts by weight based on 100 parts by weight of the PVC resin, some of the stabilizer sinks and the PVC composition is not uniformly mixed, and there is a problem that some of the stabilizer burns when the PVC composition is melted.

The colorant is added to prevent discoloration or fading of the PVC sheet, and to give it a color to give it a sense of beauty or to correct the color when forming a pattern on the surface of the PVC sheet. In the present invention, a pigment is used as a colorant to express color and to form a wooden pattern on the surface of the PVC sheet. The content of the colorant contained in the PVC sheet of the present invention is preferably 5 to 10 parts by weight based on 100 parts by weight of the PVC resin, and if the content is less than 5 parts by weight, it is difficult to express the desired color, and if it exceeds 10 parts by weight, the color Since clumping occurs, it is difficult to express a desired color or pattern, and light resistance may be deteriorated. Therefore, the content of the colorant is designed in consideration of the range suggested in the present invention.

In general, a sheet made of PVC resin is light and allows detailed printing to create a high-quality atmosphere for the cost, so it is often used as a finishing material, but has a short replacement cycle because it is weak in durability and is easily torn and scratched. In the present invention, it is characterized by introducing Al ₂ O ₃ in order to improve the scratch resistance and durability of the PVC sheet.

Al ₂ O ₃ is also known as alumina, and is an oxide-based fine ceramics with excellent abrasion resistance, heat resistance, and chemical resistance with the highest hardness after diamond. In the present invention, Al ₂ O ₃ is added to the PVC resin to make the PVC resin surface structure of the PVC sheet dense, so that it does not wear out and has resistance to frequent friction.

In the present invention, Al ₂ O ₃ is added in an amount of 12 to 18 parts by weight based on 100 parts by weight of the PVC resin. If Al ₂ O ₃ is less than 12 parts by weight per 100 parts by weight of PVC resin, the abrasion resistance and scratch resistance of the PVC sheet are insufficient, and if it exceeds 18 parts by weight, the flexibility of the PVC sheet becomes insufficient, resulting in angled base material, bends or irregularities. Since it is not easy to attach to these many base materials and is not significantly different from the effect of increasing wear resistance than when 18 parts by weight is added, the range suggested by the present invention should be noted.

In the present invention, copper (Cu) is added to the PVC resin to impart antibacterial properties to the PVC sheet. Among metal particles having antibacterial activity, silver (Ag) particles are known to have excellent activity. However, silver particles are quite expensive to apply to PVC sheets, which considers economics first, and are easily deteriorated due to ion migration (or atomic migration) in a high temperature and high humidity environment, and have strong oxidizing power and can oxidize other metals around them.

By introducing Cu, the PVC sheet of the present invention has antibacterial properties comparable to silver particles, does not deteriorate even in high temperature and high humidity environments, maintains antibacterial properties, and does not react with Al ₂ O ₃ , so the abrasion resistance, scratch resistance, and durability of the PVC sheet decrease. Does not affect

In the present invention, Cu is added in an amount of 12 to 18 parts by weight based on 100 parts by weight of the PVC resin. If Cu is less than 12 parts by weight based on 100 parts by weight of the PVC resin, it is difficult to completely block harmful bacteria and microorganisms in contact with the surface of the PVC sheet, and it is difficult to inhibit the growth of harmful bacteria and microorganisms in the scratched portion of the PVC sheet. If the Cu content exceeds 18 parts by weight based on 100 parts by weight of the PVC resin, the weight of the PVC sheet increases, and after being attached to the base material, it may flow down due to the weight or fall from the base material. In addition, since it is not significantly different from the antimicrobial activity effect than the case of adding 18 parts by weight, it should be noted the range presented in the present invention.

1 is a 600 times enlarged photograph of the PVC sheet manufactured in an embodiment of the present invention. Referring to FIG. 1, it can be seen that white crystals of Al ₂ O ₃ and yellow Cu particles are uniformly dispersed in the sheet.

Figure 2 is a flow chart showing a method of manufacturing a PVC sheet according to an embodiment of the present invention. Referring to Figure 2, the manufacturing method of the PVC sheet according to this embodiment is as follows.

In the stirring step (11), PVC resin, plasticizer, stabilizer, colorant, Al ₂ O ₃ and Cu are added to a stirrer and stirred at 90 to 120° C. for 3 to 15 minutes at 1000 to 1500 rpm to form a PVC composition. Preferably, the mixture is stirred at 1200 rpm for 5 to 10 minutes at 95 to 110 °C. At this time, the stirrer uses Super Mixa.

The temperature of the obtained PVC composition is about 100 °C, and in the first cooling step (12), the PVC composition obtained from the super mix is discharged to a cooling mixer, and is first cooled to 30-50 °C. At this time, in order to maintain the uniformity of the PVC composition, it can be cooled while stirring at a speed of 400 to 600 rpm.

In the melting step (13), the first cooled PVC composition is transferred to an extruder and heated to a temperature of 150 to 200 °C to melt.

In the first kneading step (14), the molten PVC composition is first kneaded while stirring at 140 to 160 °C in a mixing roll in order to make the melted PVC composition uniform.

In the second kneading step (15), the firstly kneaded PVC composition is transferred to a warming roll, and the mixture is secondarily kneaded while stirring at 140 to 160°C.

In the impurity removing step (16), impurities such as metal powder or foreign matter are filtered out from the PVC composition secondly kneaded with a mesh net.

In the forming step 17, the PVC composition from which impurities have been removed is rolled at 170° C. or higher by passing through a calendar roll to form a sheet. At this time, the rolled sheet is stretched to adjust the desired thickness and width.

In the embossing step 18, the molded PVC sheet is dried and passed through an embossing device to apply a pressure of 10 to 30 bar to apply a pattern. At this time, the pattern can be coated with a tree ring pattern to give the PVC sheet an atmosphere similar to that of solid wood.

The temperature of the PVC sheet that has passed through the embossing device is 100° C. or higher, but undergoes a secondary cooling step 19 to facilitate winding for storage and transportation.

Hereinafter, the present invention will be described in more detail through Examples, Comparative Examples and Test Examples.

The PVC sheet according to an embodiment of the present invention uses p-1000 as a PVC resin, DOTP (dioctyl terephthalate), ESBO (epoxidized soybean oil) as a plasticizer, Bz 184T, Bp 276S, and a pigment as a stabilizer. I did. In addition, Al ₂ O ₃ and Cu in powder form were prepared.

Example 1

100 g of p-1000, 18 g of DOTP, 2 g of ESBO, 3 g of Bz 184T, 0.3 g of Bp 276S, 6 g of pigment, 15 g of Al ₂ O ₃ and 15 g of Cu were added to a stirrer and stirred at 1200 rpm for 10 minutes to form a composition. At this time, the temperature of the composition was 100 ℃ and cooled to 40 ℃ by flowing cooling water. After heating the composition until it melted, it was transferred to a mixing roll and stirred at 150° C. for 10 minutes and 160° C. for 10 minutes to make the composition uniform. The composition was filtered through a mesh and passed through a calendar at 170° C. to prepare a PVC sheet in the form of a sheet.

Example 2

It was prepared in the same manner as in Example 1, but 18 g of Al ₂ O ₃ and 15 g of Cu were added.

Example 3

It was prepared in the same manner as in Example 1, but 15 g of Al ₂ O ₃ and 17.8 g of Cu were added.

Comparative Example 1

It was prepared in the same manner as in Example 1, but 15 g of Cu was added.

Comparative Example 2

It was prepared in the same manner as in Example 1, but 11.6 g of Al ₂ O ₃ and 15 g of Cu were added.

Comparative Example 3

It was prepared in the same manner as in Example 1, but Al ₂ O ₃ 25g and Cu 15g were added.

Comparative Example 4

It was prepared in the same manner as in Example 1, but 15 g of Al ₂ O ₃ was added.

Comparative Example 5

It was prepared in the same manner as in Example 1, but 15 g of Al ₂ O ₃ and 10.5 g of Cu were added.

Comparative Example 6

It was prepared in the same manner as in Example 1, but 15 g of Al ₂ O ₃ and 24.8 g of Cu were added.

Comparative Example 7

It was prepared in the same manner as in Example 1, but 15 g of Al ₂ O _{3 and} 15 g of Ag were added.

Each of the components and contents used in the Examples and Comparative Examples prepared as described above are summarized in Table 1 below.

Ingredients (g) Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 PVC 100 100 100 100 100 100 100 100 100 100 DOTP 18 18 18 18 18 18 18 18 18 18 ESBO 2 2 2 2 2 2 2 2 2 2 Bz 184T 3 3 3 3 3 3 3 3 3 3 Bp 276S 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 Pigment 6 6 6 6 6 6 6 6 6 6 Al ₂ O ₃ 15 18 15 - 11.6 25 15 15 15 15 Cu 15 15 17.8 15 15 15 - 10.5 24.8 - Ag - - - - - - - - - 15

Test Example 1

In Test Example 1, abrasion resistance, tensile strength, tear strength and elongation tests were performed for Examples 1 to 3 and Comparative Examples 1 to 7, and the results are disclosed in Table 2.

The wear resistance was measured by the ASTM D 1630 method, the tensile strength was measured by the ASTM D412 method, the tear strength was measured by the ASTM D624 method, and the elongation was measured by the ASTM D412 method (specimen size: horizontal and Each 15 cm in length, temperature at the test site: 19 ℃, humidity: 60%).

Wear resistance
(NBS, %) The tensile strength
(kg/㎠) Tear strength
(kg/cm) Elongation
(%) Example 1 870 89.5 46 310 Example 2 920 95 50.2 332 Example 3 878 96 54 330 Comparative Example 1 120 35 18 180 Comparative Example 2 180 50.2 26.7 192 Comparative Example 3 924 98 43 317 Comparative Example 4 680 78 39 306 Comparative Example 5 720 86.8 43.4 296 Comparative Example 6 905 92 48 308 Comparative Example 7 712 94 48.8 310

As shown in Table 2, when the Cu content is the same but the Al ₂ O ₃ content is increased in the order of Comparative Example 1, Comparative Example 2, Example 1, Example 2, Comparative Example 3, Al ₂ O ₃ content It can be seen that as this increases, tensile strength, tear strength, and elongation, including wear resistance, generally increase. In the case of Comparative Example 1 that did not contain Al ₂ O ₃ at all, the lowest values were shown in all of the wear resistance, tensile, tear strength, and elongation. Comparing Comparative Example 2 and Example 1, the Al ₂ O ₃ content of Comparative Example 2 and Example 1 was not significantly different, but the increase was found to be large in the remaining items including the wear resistance. From this, it can be seen that even if Al ₂ O ₃ is contained, the abrasion resistance effect is not large if the content is less than 12. In addition, when comparing Example 2 and Comparative Example 3, although Comparative Example 3 had a higher Al ₂ O ₃ content than Example 2, it was found that the degree of increase in the remaining items including the wear resistance was not large. From this, it can be seen that even if the Al ₂ O ₃ content exceeds 18 parts by weight, it is not significantly different from the effect when 18 parts by weight is added. It can be seen that the Al ₂ O ₃ content is preferably 12 to 18 parts by weight based on 100 parts by weight of the PVC resin.

Test Example 2

In Test Example 2, the antibacterial performance against E. coli of Examples 1 to 3 and Comparative Examples 1 to 7 was measured, and the results are shown in Table 3 below.

E. coli E.Coli ATCC 25922 was used as the strain, and as the neutralizing solution, the phosphate buffer solution (pH 7.0 ±2), the sample surface area was 60 ㎠, the number of shaking was 120 rpm, and the reduction rate (%) was [(Mb-Mc) / Ma] X 100 and the increase rate (F) was calculated as Mb / Ma (31.6 times or more) (Ma: number of initial bacteria in the control sample, Mb: number of bacteria in the control sample after 24 hours incubation, Mc: in the test sample after 24 hours incubation Number of bacteria).

Al ₂ O ₃ content (g) Cu content (g) Ag content (g) Antibacterial activity
(%) Example 1 15 15 - 96 Example 2 18 15 - 95 Example 3 15 17.8 - 97 Comparative Example 1 - 15 - 90 Comparative Example 2 11.6 15 - 88 Comparative Example 3 25 15 - 94 Comparative Example 4 15 - - 40 Comparative Example 5 15 10.5 - 52 Comparative Example 6 15 24.8 - 97 Comparative Example 7 15 - 15 92

As shown in Table 3, the Al ₂ O ₃ content is the same, but comparing the order of increasing the Cu content in Comparative Examples 4, 5, 1, 3, and 6, there is no Cu. Comparative Example 4 exhibited remarkably low antibacterial activity. Comparing Comparative Example 5 and Example 1, it was found that the Cu content of Comparative Example 5 and Example 1 was not significantly different, but the antimicrobial activity was significantly increased. From this, it can be seen that even if Cu is contained, the antibacterial activity effect is not large if the Cu content is less than 12. In addition, when comparing Example 3 and Comparative Example 6, it was found that there was no significant difference in antibacterial activity even though Comparative Example 6 had a higher Cu content than Example 3. From this, it can be seen that even if the Cu content exceeds 18 parts by weight, it is not significantly different from the effect when 18 parts by weight is added. It can be seen that the Cu content is preferably 12 to 18 parts by weight based on 100 parts by weight of the PVC resin.

Test Example 3

In Test Example 3, the values of Minimum Inhibitory Concentration (MIC) of Example 1 and Comparative Example 7 were measured to compare the antimicrobial activities of Cu and Ag, and the results are disclosed in Table 4. For comparison of the control group, the MIC value was also measured for Comparative Example 4, and the measurement test was Gutierrez, F. M. et al., 2010. Synthesis, characterization, and evaluation of antimicrobial and cytotoxic effect of silver and titanium nanoparticles. Nanomedicine 6: 681-688 and Kim, K. J. et al. 2009. Antifungal activity and mode of action of silver nano-particles on Candida albicans. Biometals. 22: 235-242.

Example 1
(Cu 15%) Comparative Example 7
(Ag 15%) Comparative Example 4
(Control) Gram positive B. subtilis 1.6 1.7 32 M. bovis 1.1 1.1 0.5 Gram voice A. baumanii 0.38 0.4 .06 E. coli 0.47 0.5 0.5 Fungi A. niger 25.4 25 2 C. albicans 5.5 6.0 0.2

In general, silver (Ag) particles are mainly used as antibacterial agents due to their high antimicrobial activity, but looking at the results in Table 4, in both Example 1 containing copper (Cu) and Comparative Example 7 containing Ag, Gram positive and Gram negative And it showed the effect of suppressing mold. From this, it was found that Example 1 containing Cu has comparable antibacterial activity compared to Comparative Example 7 containing Ag, and for some microorganisms, Example 1 was found to have better antimicrobial activity than Comparative Example 7.

So far, preferred examples, comparative examples, and test examples for the present invention have been described. Although it has been described in detail through Examples, Comparative Examples and Test Examples of the present invention, this is not intended to limit the present invention, but only to prove the present invention. Accordingly, it will be apparent to those of ordinary skill in the art that the scope of the present invention is not limited by these examples according to the gist of the present invention. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

Claims (7)

In the PVC sheet available as an interior finishing material,
Including PVC resin, plasticizer, stabilizer, colorant, Al ₂ O ₃ and Cu,
Al ₂ O ₃ is 12 to 18 parts by weight based on 100 parts by weight of the PVC resin,
Cu is 12 to 18 parts by weight based on 100 parts by weight of the PVC resin,
The PVC sheet
A stirring step to obtain a PVC composition by adding PVC resin, plasticizer, stabilizer, colorant, Al ₂ O ₃ and Cu to a stirrer and stirring at 1000 to 1500 rpm for 3 to 15 minutes at 90 to 120 °C;
The first cooling step of cooling the obtained PVC composition to 30 ~ 50 ℃;
Melting step of melting the cooled PVC composition by heating to 150 ~ 200 ℃;
A first kneading step of uniformly stirring the melted PVC composition at 140 to 160 °C;
A second kneading step of uniformly stirring the first kneaded PVC composition at 150 to 170 °C;
An impurity removal step of removing impurities by filtering the second-kneaded PVC composition through a mesh network;
Forming a PVC sheet by rolling and stretching the PVC composition from which impurities are removed;
An embossing step of forming a pattern by passing the molded PVC sheet through an embossing device after drying;
A secondary cooling step of cooling the PVC sheet passing through the embossing device at room temperature;
PVC sheet, characterized in that produced by the method of manufacturing a PVC sheet comprising a. delete delete The method of claim 1,
PVC sheet, characterized in that the plasticizer 15 to 25 parts by weight, stabilizer 3 to 6 parts by weight, colorant 0.1 to 2 parts by weight based on 100 parts by weight of the PVC resin. In the manufacturing method of PVC sheet usable as an interior finishing material,
A stirring step to obtain a PVC composition by adding a PVC resin, a plasticizer, a stabilizer, a colorant, Al ₂ O ₃ and Cu to a stirrer and stirring at 1000 to 1500 rpm for 3 to 15 minutes at 90 to 120 °C;
The first cooling step of cooling the obtained PVC composition to 30 ~ 50 ℃;
Melting step of melting the cooled PVC composition by heating to 150 ~ 200 ℃;
A first kneading step of uniformly stirring the melted PVC composition at 140 to 160 °C;
A second kneading step of uniformly stirring the first kneaded PVC composition at 150 to 170 °C;
An impurity removal step of removing impurities by filtering the second-kneaded PVC composition through a mesh network;
Forming a PVC sheet by rolling and stretching the PVC composition from which impurities are removed;
An embossing step of forming a pattern by passing the molded PVC sheet through an embossing device after drying;
A secondary cooling step of cooling the PVC sheet passing through the embossing device at room temperature;
Manufacturing method of a PVC sheet comprising a. The method of claim 5,
In the stirring step, Al ₂ O ₃ is 12 to 18 parts by weight based on 100 parts by weight of the PVC resin. The method of claim 5,
In the stirring step, Cu is 12 to 18 parts by weight based on 100 parts by weight of the PVC resin.

Images