KR20060023787A - Process for the manufacturing of pvc sheet that are coated with functional polyurethane resin, and building interior sheets made by the same - Google Patents

Abstract

The present invention provides a method of coating a special functional polyurethane color resin on the surface of a polyvinyl chloride (PVC) sheet to produce a product for building materials interior materials that create the texture of natural leather and various colors, antibacterial, flame retardant, and the like. . More specifically, the present invention provides a method for producing a functional polyurethane-PVC sheet, comprising the steps of: i) mixing a polyurethane resin, a pigment and at least one functional additive to prepare a polyurethane resin composition; ; ii) a first application step of first coating and drying the functional color polyurethane resin composition on a release paper; iii) a second application step of second coating and drying the colored polyurethane resin composition again on the primary coated surface; iv) a kneading step of coating and drying the polyurethane adhesive composition on the secondary coated color polyurethane resin film; v) separately mixing and mixing the PVC resin and the functional additives, and rolling and cooling the kneaded blend to produce a functional PVC sheet; vi) bonding the PVC sheet onto the adhesive film obtained in step iv), then cooling and winding onto a roll; And vii) a step of naturally aging the release paper-polyurethane-PVC laminate thus wound up, followed by peeling off the release paper. The functional additives include one or more additives selected from the group consisting of antimicrobial agents, deodorants, flame retardants, fouling agents, tactile modifiers, abrasion resistant agents, and the like, which can be easily bonded to polyurethane resins or polyvinyl chloride resins. One or more of the polyurethane resin composition, the polyurethane resin adhesive, and the PVC resin composition may be combined in various ways depending on the intended use of the final product. Accordingly, the present invention also provides a sheet for building interior materials having good characteristics such as antibacterial, deodorization, flame retardant, stain resistance, texture modification, abrasion resistance, etc. and satisfying the texture and various colors of natural leather.

Polyurethane, Polyvinyl Chloride (PVC) Sheet, Flame Retardant, Antibacterial, Abrasion Resistant, Pollution Resistant, Tactile Modified, Release Paper

Description

Process for the manufacturing of PVC sheet that are coated with functional polyurethane resin, and Building Interior sheets made by the same}             

1 is a manufacturing process diagram of polyurethane-PVC sheet according to the present invention.

Figure 2 schematically shows a polyurethane-PVC sheet laminate prepared according to the production method of the present invention.

Figure 3 is a request test report of the Korea Fire Protection Corporation of the polyurethane-PVC sheet prepared according to the production method of the present invention.

Figure 4 is a photograph showing the flame resistance test results of the polyurethane-PVC sheet prepared according to the production method of the present invention.

5 is an antimicrobial test report of the polyurethane-PVC sheet prepared according to the production method of the present invention.

Figure 6 is a culture photograph showing the antimicrobial test results of the polyurethane-PVC sheet prepared according to the production method of the present invention.

7 is a graph showing the adhesion test results of the polyurethane-PVC sheet prepared according to the production method of the present invention. A) Adhesion of commercially available PVC sheets, B) Medium adhesion of polyurethane coated PVC sheets, C) Final adhesion of polyurethane coated PVC sheets.

8 is a photograph taken comparing the design of the polyurethane-PVC sheet prepared according to the manufacturing method of the present invention and the existing PVC sheet.

The residential environment is changing due to the large-scale supply of housing, redevelopment projects, and construction of new towns. However, the reality is that housing suppliers are indifferent to creating a pleasant and healthy living environment. However, with the recent increase in national income and attention to the residential environment leading to health, new attempts and winds are blowing in the building interior materials industry. In line with this, various functional building interior materials have been released in the market, but few products complement the functional, design and environmental health aspects.

Currently, the commercialized PVC sheet for building materials is a situation that does not meet the various needs of consumers because it supplies products limited to simple wood pattern and two to three colors of the primary color of the wood.

In addition, there is a problem with the building interior materials, and the damage caused by microorganisms to the diet, housing, clothing industry products by the microorganisms is a serious level. Microorganisms such as bacteria and fungi are not only very diverse, but are widely distributed in nature such as soil, air, and water, and can grow and grow at any time when growth conditions are met. In particular, recently, the problem of infection in the hospital by various resistant bacteria (MRSA, VRSA, VRE), bed sores caused by antibiotic-resistant Pseudomonas aeruginosa infection, pathogenic Escherichia coli O-157, vibrio, salmonella, canopybacter and yellow staphylococcus Food poisoning caused by aureus, pneumonia caused by Legionella that grows in cooling water in a cooling tower installed on a building roof, pediatric asthma caused by mold spores in houses, accidents caused by microbial contamination in the manufacturing line of medicines and foods, industrial There are many problems caused by harmful microorganisms such as deterioration due to contamination of products, houses, wood, cosmetics, and the like. Therefore, microbial research to prevent human diseases and animals and plants caused by microorganisms has been conducted for a long time, but it is recognized that the damage caused by microorganisms is serious in fiber, plastic, paper, wood, metal, glass, etc. Countermeasures are urgent and research on these is being actively conducted.

The main causes of human injury in building fires are due to complex phenomena such as smoke exposure and asphyxiation and poisoning. The smoke consists of tiny particles suspended in the air that contain toxic gases from the product of the combustion process. The generation of these combustion gases depends on the space-controlled and fuel-controlled fires, but when the interior materials or furniture are burned in an enclosed room, when the oxygen concentration in the room is below the limit oxygen level, natural combustion occurs. Sometimes. Accordingly, research on building interior materials for flame retardant that does not contain toxic gas and induces inertness is actively conducted.

In Korea Patent Publication No. 2001-0029008, the process is simple and the peelability of the release paper for PVC is increased, and the pattern of the artificial leather is not limited to the release paper pattern, and the wear-resistant artificial fabric can arbitrarily form any pattern regardless of the release paper pattern. Manufacturing method of leather, more specifically, polyurethane (PU) sol compounding process, polyvinyl chloride (PVC) sol compounding process, foaming process of coating a polyurethane resin and PVC resin on foamed PVC release paper and foaming, before embossing Disclosed is a method for producing a polyurethane / polyvinyl chloride artificial leather, including a pretreatment process for adjusting color and gloss, an embossing process for preforming an intermediate product to form a pattern on the product, and a post-treatment process for controlling printed patterns and tactile feel. Doing. The feature of this patent application is to provide artificial leather with abrasion resistance and various design, and there is no mention or suggestion about artificial leather having antibacterial, deodorizing, flameproofing, and fouling resistance characteristics of the present invention.

Accordingly, the present invention is a method for producing a polyolefin-PVC sheet that creates various colors of natural leather texture and special functionalities such as antibacterial and flame retardant, which are known to have no application in domestic and foreign architectural interior materials. The functional additive is mixed with at least one of the polyurethane resin, polyurethane resin adhesive and PVC resin composition, and has excellent properties such as antibacterial and flame retardant of the final artificial leather, and according to the working process of the present invention, It aims at providing the manufacturing method which is excellent in adhesiveness and also excellent in release paper peelability.                         

The necessity of antimicrobial properties for building interior materials, which is one of the objects of the present invention, has long emerged as a major issue in the human living environment. Areas in contact with the body, such as bedding and furniture used by humans, are prone to breeding of various microorganisms to create an unpleasant environment such as discoloration and odor generation. This is because various organic substances are produced by various microorganisms on the skin in secretions such as sweat. These microorganisms decompose various organic matters contained in time and sweat to form ammonia, isogil acetic acid, vinegar acid, and the like, causing odors. These microorganisms can also cause infectious diseases, discoloration contamination of fibers, and the like. Therefore, as a way to solve many of these problems can be fundamentally improved by giving antimicrobial to the fiber or interior materials.

Accordingly, the present invention provides a method for producing a product for building interior materials by coating a special functional polyurethane color resin on the surface of the PVC sheet and transferring various patterns of the release paper (R / P) to create a texture and various colors of natural leather. do.

Currently, commercialized PVC sheet for interior materials for building materials does not satisfy various needs of consumers due to supplying products limited to simple wood patterns and two or three colors of primary colors of wood. In this regard, the present applicant has developed a functional building interior sheet that can express a variety of patterns and colors using a polyurethane resin and a release paper (R / P) including a special function, and a manufacturing method that compensates for the problems of the prior art. We have supplied various functional design products (special functions such as flame resistance, pollution resistance, and durability) that consumers want.

More specifically, the present invention provides a method of producing a functional polyurethane-PVC sheet in a first aspect, comprising: i) mixing a polyurethane resin, a pigment and at least one functional additive to prepare a polyurethane resin composition; ; ii) a first application step of first coating and drying the functional color polyurethane resin composition on a release paper; iii) a second application step of second coating and drying the colored polyurethane resin composition again on the primary coated surface; iv) a kneading step of coating and drying the polyurethane adhesive composition on the secondary coated color polyurethane resin film; v) separately mixing and mixing the PVC resin and the functional additives, and rolling and cooling the kneaded blend to produce a functional PVC sheet; vi) bonding the PVC sheet onto the adhesive film obtained in step iv), then cooling and winding onto a roll; And vii) a step of naturally aging the release paper-polyurethane-PVC laminate thus wound up, followed by peeling off the release paper.

As a preferred embodiment of this embodiment, the functional additive is one selected from the group consisting of antimicrobial agents, deodorants, flame retardants, stain-resistant agents, tactile modifiers, abrasion-resisting agents, and the like, which can be easily combined with polyurethane resins or polyvinyl chloride resins. Or more or more additives, and may be mixed in one or more of a polyurethane resin composition, a polyurethane resin adhesive, and a PVC resin composition depending on the intended use of the final product.

Thus, the term "functional" mentioned in the production method of the present invention includes, but is not limited to, antibacterial, deodorant, flame retardant, pollution, tactile modification, wear resistance, design.

In a preferred embodiment of this embodiment, the antimicrobial agent that can be easily combined with the polyurethane resin or PVC resin include charcoal, loess, ultrafine silver, ultrafine anion and the like, and a deodorant that can be easily combined with the polyurethane resin or PVC resin. Examples of the ceramics include silver and silver. Flame retardants that can be easily combined with polyurethane resins or PVC resins include bromine-based, chlorine-based, iodine-based, fluorine-based, and phosphorus and halogen-containing products, and can be easily combined with polyurethane resins or PVC resins. Zero uses a lot of silicon, and there are more than 100 kinds of varieties, mainly from Shin-Etsu and Toshiba. Especially for polyurethane, TSE-350, ORKF-1600, etc. are used. Tactile modifiers that can be easily combined with polyurethane resins or PVC resins include petroleum, natural animal or vegetable, synthetic waxes, and abrasion resistant agents that can be easily combined with polyurethane resins or PVC resins. , Wax and the like.

Such additives may be liquid or micronized in any form in the powder phase, or may be easily mixed with the polyurethane resin or PVC resin through the use of binding aids such as stabilizers, emulsifiers, suspending agents, solvents and the like.

Looking specifically, the treatment of various additives to the polyurethane resin or PVC resin can be carried out based on the production method of antimicrobial fiber products known in the art. For example, the method for producing the antibacterial fiber product can be broadly divided into a yarn improvement method (pretreatment method) and post-treatment method. In the pretreatment method, there is a method of copolymerizing the antimicrobial compound in the polymerization step of the synthetic fiber, a method of blending the antimicrobial compound during spinning. As a post-treatment method, a method of imparting an antimicrobial compound at the time of twisting, a method of imparting an antimicrobial compound at the time of dyeing in the real state, or adding a crosslinking agent or the like to the fiber in the final finishing process such as dyeing or processing in a textile state. There are a method of fixing and giving.

1) Pretreatment Method

Representative examples of the pretreatment method include the production of nylon and polyester fibers incorporating a silver-based inorganic antibacterial agent in powder form. Specifically, in the case of polyester, the antimicrobial-incorporated polyester chip is prepared in a master batch by incorporating a silver-based inorganic antimicrobial agent during the polymerization of the fiber, and the antimicrobial polyester fiber is manufactured using the chip.

The characteristic of the yarn modification type is that washing durability is excellent because the antimicrobial agent is incorporated into the fiber, but it takes time to produce the antimicrobial effect as compared to the post processing type.

In addition, there are examples in which antimicrobial substances such as chitosan, which are known to have antimicrobial properties, are mixed in the production of acrylic fibers and rayon, or quaternary ammonium salts are incorporated into rayon fibers to produce antimicrobial fibers.

2) Post-treatment method

As a method of imparting antimicrobial performance to the fiber by the post-treatment method, ① coating the antimicrobial agent on the fiber by spraying ② dipping the salt solution in the liquid to which the antimicrobial agent is added, such as dyeing process ③ antimicrobial agent There is a pad method or a coating method for padding the liquid containing. Antimicrobial and deodorized textile products are generally processed to the final stage of the post-dyeing process, sometimes after the finished product is processed with a processing agent.

At this time, in order to improve the durability of the antimicrobial agent, a method of fixing the antimicrobial component to the fiber surface by using a synthetic resin capable of crosslinking a reactive resin and a fiber or forming a film is often used.

Method by means of reactive resin

This process is a method of treating an antimicrobial agent on the surface of the fiber and then crosslinking the antimicrobial component with the fiber and at the same time heat-fixing the antimicrobial agent on the fiber surface through the mediation of the reactive resin.

Aqueous solution of quaternary ammoniumated chitosan and film-forming reactive resin was treated on nylon or polyester fabric by spraying, padding or coating method and heat-treated at 130 ~ 180 ℃ Open and purify.

Adsorption immobilization of antimicrobial agent on the fiber surface

This process uses chemical reactions to immobilize and fix the antimicrobial agent on the fiber surface. The antimicrobial agent eluted from the fiber surface has an antimicrobial effect.

How to use organosilicon quaternary ammonium salt

In this process, the organosilicon-based quaternary ammonium salt is covalently bonded to the hydroxyl group and trimethoxyl group on the cotton fiber surface to fix the antimicrobial agent on the fiber surface and to coat the fiber surface with the organosilicon film.

For example, organosilicon-based quaternary ammonium salts are treated on the surface of cotton fibers by a dipping method or a padding method, followed by drying at 80 to 120 ° C. to remove water or methanol. By this operation, the antimicrobial component is undispersed in water and trimethyl group is decomposed to covalently bond the fiber surface and the enzyme atom of the antimicrobial component, and the reactive resin of organosilicon is graft polymerized to form a very strong thin film and the antimicrobial agent is heat-set. do.

The antimicrobial agent used in the antibacterial and deodorized fiber is used in the antimicrobial processed fiber, such as organometallic, guanisine, halosiallyl urea, phenol, fatty acid ester, natural (chitosan, hinokichiol, etc.). As the organic antimicrobial agent, the quaternary ammonium salt-based antimicrobial agent occupies the overwhelming position, and the use of the organosilicon-based quaternary ammonium salt is prominent.

Brief description of the quaternary ammonium salt-based antimicrobial agent has a structure in which four hydrocarbons are bonded to a nitrogen atom in terms of chemical structure. Of these, ospan (benzalcholium chloride) used as a disinfectant in water washing is a representative example of the organosilicon-based quaternary ammonium salts that are frequently used for textiles, such as 3-trimethoxyylpropyldimethyloctadecyl ammonium chloride. Can be.

There are two antimicrobial mechanisms of quaternary ammonium salts, one of which is the physical destruction of the cell membrane. The cation of the ammonium molecule binds to the anion site on the bacterial surface and physically destroys the cell membrane by hydrophobic interaction. The other is the action of inhibiting metabolic function (growth) by inhibiting the enzyme in the cell by the strong adsorption reaction of the quaternary ammonium salt due to the bacterium's metabolic function inhibition.

Fixing method by sputtering

Sputtering has been used to form thin films since Grove discovered in 1852. The sputtering method includes a direct current bipolar sputtering method, a high frequency sputtering method, a magnetron sputtering method, and a reactive sputtering method. In this process, polyester is washed with a taffeta cloth with a neutral detergent and dried, and then the sample is placed in a drum in the chamber of the magnetron sputtering apparatus, and the pressure is first reduced to 1x10-3 Pa in the vacuum apparatus, followed by filling with argon gas. While adjusting to a predetermined pressure while discharging a DC current at a voltage of 100 to 1000 V for 30 minutes, impurities adhering to the target (silver, copper, titanium) surface are removed. Subsequently, the drum is sputtered for a predetermined time (12 to 20 seconds) while circulating coolant at 18 ° C. to suppress the temperature rise of the target by setting the rotation speed to 10 rpm.

Therefore, those skilled in the art will be able to arbitrarily select and apply a method for easily mixing the functional additives with the polyurethane resin or the PVC resin of the present invention among such known antibacterial treatment methods.

The polyurethane resin composition thus prepared was then first coated on a release paper using a roll coater or the like, dried at a temperature of 100 to 120 ° C., and then secondarily coated in the same manner as described above. To dry.

Here, for example, an antibacterial agent and a tactile modifier may be added to the polyurethane resin composition used for the primary coating as a functional additive, and a flame retardant and an antiwear agent may be added to the secondary coating to form different functional coatings.

In addition, the polyurethane resin primary coating may be applied with a release paper such that the total thickness is 0.02 mm and the secondary coating may be applied with 0.04 mm.

The polyurethane adhesive composition is roll-coated and applied onto the polyolefin resin film thus coated, and subsequently dried at a temperature of about 120 to 125 ° C. At this time, the polyurethane adhesive composition may contain a two-component polyurethane resin, a crosslinking agent, a crosslinking accelerator, a solvent, and a functional additive. As a crosslinking agent, polyisocyanate is preferable, and dibutyltin dichloride is preferable as a crosslinking promoter. Examples of the solvent include methyl ethyl ketone and dimethyl formamide, with methyl ethyl ketone being preferred.

In the bonding step of applying the adhesive, the adhesive may be formed into a film having a thickness of about 0.04 mm on the color polyurethane resin appropriately dried in the applying step.

The PVC resin sheet is separately mixed by mixing PVC resin, pigment and functional additive in a mixer at about 80 to 90 ° C., followed by secondary kneading and rolling the kneaded blend through a calender through a conveyor through a high temperature roll, and then After cooling, it is manufactured and wound in a winder in a certain amount, about 800 to 1000 times. At this time, the temperature of the high temperature roll is preferably about 190 to 200 ℃. The manufacturing process chart of such a PVC sheet was typically shown in FIG.

Thus wound PVC sheet is bonded on the polyurethane resin film to which the adhesive is applied while moving through a heating roll, and then the bonded release paper-polyurethane resin-PVC resin laminate is sequentially moved in the moving direction and the cooling roll is removed. Product smoothness can be maintained. The provision of the PVC sheet through the heating roll here prevents the overlapping phenomenon that occurs when the PVC sheet is bonded to the polyurethane film.

The laminate is then wound up and naturally aged at room temperature for about 48 hours and then peeled off with release paper to give a multifunctional polyurethane-PVC resin sheet. Natural aging of the laminate at room temperature completely solved the problem that the product is soft and does not peel off at high temperature aging.

As described above, according to the present invention, an improved PVC treatment, PVC sheet lamination process, and the like are improved in functionality (e.g., sanitary (antibacterial or deodorant), flame retardant, durability, tactile improvement, fouling resistance, adhesion). Leather can be obtained.

Accordingly, the present invention provides, in a second aspect, a functional polyurethane-PVC sheet produced by the above-described manufacturing method. The lamination distribution of this polyurethane-PVC sheet is shown schematically in FIG. 2. Such functional PVC artificial leather can be used in a variety of applications such as building interior materials, clothing and similar products.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention should not be considered as limited to these Examples.

Example 1

Multifunctional Polyurethane Coating Manufacturing

First, the first polyurethane resin composition as shown in Table 1 below to form a film on the release paper using a roll coater, and then sequentially moved in the release paper pattern direction through a dryer maintained at 100 to 120 ℃ dried I was. Then, the second polyurethane resin composition as shown in Table 2 below was dried once after forming a film in the same manner as above.

ingredient Content (parts by weight) Polyurethane resin 100 Dimethylformamide 10 Methyl ethyl ketone 60 Pigment 15 Antimicrobial 5 Tactile wax 3

ingredient Content (parts by weight) Polyurethane resin 100 Dimethylformamide 10 Methyl ethyl ketone 60 Pigment 15 resist 10 silicon 2

Example 2

Preparation of Flame Retardant PVC Sheet

The PVC sheet flame retardant composition of Table 3 was added to a supermixer and stirred at a temperature of about 80 to 90 ° C., followed by second kneading, and the kneaded PCV sheet blend was heated through a calender through a roll at a temperature of about 190 to 200 ° C. Rolling produced a PVC sheet. The sheet was cooled through a cooling roll and wound around 800 to 1000 m to obtain a flameproof PVC sheet.

Example 3

Manufacture of polyurethane-PVC sheet with antibacterial, flame retardant, tactile and durable properties

After applying the polyurethane adhesive composition shown in Table 3 on the polyurethane resin film coated on the release paper prepared as in Example 1 and subsequently dried at a temperature of 120 to 125 ℃. Then, the PVC sheet obtained in Example 2, which is a base paper, was bonded onto the adhesive film, and the laminated sheet was passed through a cooling roll while moving in the same moving direction as the PVC sheet, then wound up and wound at room temperature for 48 hours. Aged. The release paper was then peeled off to obtain the polyurethane-PVC sheet of the present invention.

ingredient Content (parts by weight) 2-component polyurethane resin 100 Polyisocyanate 12 Dibutyl Dichloride 12 Methyl ethyl ketone 25 toluene 25 resist 20

Example 4

Flame retardancy test on multifunctional polyurethane-PVC sheet prepared according to Example 3

Fire retardant performance test was commissioned to Korea Fire Protection Corporation. Flame-proof specimens were wallpaper D / W, City Brown, City Black, Joy prepared in the same manner as in Example 3, except that the pattern of the additive pigment and the release paper was used differently. Four were used and the test was run over three experiments for each sample. As a result of flame retardant test, the remaining flame time and remaining time of all four samples were satisfied with 0 seconds which is better than the standard within 3 seconds and within 5 seconds. Coal screening area also satisfies all of the standard value within 30cm2 within the average of 25cm2. The carbonization length was also satisfied with the average of all four samples within 7.0cm, and the results of the overall flame retardancy test showed not only satisfactory domestic standards but also excellent flame retardancy. The average value of the test results for each sample is shown in Table 4 (Required Test Report of Korea Fire Protection Corporation-Figure 3). In addition, each specimen at the beginning and the completion of the flame test was photographed and shown in FIG.

Test Items standard Test result D / W City brown City black joy Afterglow time Within 3 seconds 0.0sec 0.0sec 0.0sec 0.0sec Remaining time Within 5 seconds 0.0sec 0.0sec 0.0sec 0.0sec Ammunition Within 30㎠ 24.3 23.2 25.1 22.4 Carbonization length Within 20㎠ 6.0 6.0 5.8 5.5

Example 5

Antimicrobial Test on Multifunctional Polyurethane-PVC Sheet Prepared According to Example 3

In this antimicrobial test, City Brown and City Black, two of four samples that were commissioned by Korea Fire Protection Corporation for the flame retardancy test in Example 4, were examined by the Korea Consumption Science Research Center. . The antimicrobial test was performed using Staphylococcus aureus and Escherichia coli to determine the bacteriostatic reduction rate for these two microorganisms. Humans do not have to worry about this bacteria, but it resides on human skin, so when the skin, which is a human's defense, is destroyed, it causes infections. It is characterized by strong infectivity, which has been solved by the development of penicillin antibiotics. It has been shown to be resistant to antibiotic abuse, and it is MRSA (Methicillin-Resistant Staphylococcus Aureus). This bacterium is very common and is present in many hospitals in Korea, as well as in developed countries such as the United States and Japan, and is known to be concentrated in the intensive care unit using antibiotics.

Antimicrobial testing was performed based on shake flask method (SHAKE FLASK METHOD-KS M 0146-2003). Staphylococcus aureus and E. coli suspension diluted in phosphate buffer solution (pH 7.0 ± 0.2) at concentrations of 1.3x105 and 1.5x105, respectively, were applied to 60 cm2 specimens, incubated for 24 hours in a constant temperature incubator at a shaking speed of 120 rpm. The bacteriostatic reduction rate was calculated by counting. As a control specimen, a conventional PVC sheet was used, which was treated in the same manner as the antimicrobial test for the specimen of the present invention. The test results are shown in Table 5 below.

Test species Staphylococcus aureus Escherichia coli City black City brown City black City brown Bacterial concentration (CFU / ml) 1.3 x 10 ^{5 1.5} x 10 ⁵ Ma 1.3 x 10 ^{5 1.5} x 10 ⁵ Mb 5.5 x 10 ⁶ 6.7 x 10 ⁶ Mc <10 <10 <10 <10 Growth rate (F) 42 times 45 times Nonionic surfactant TWEEN 80 (0.05%) Bacteriostatic reduction rate (%) 99.9% 99.9% 99.9% 99.9%

The bacteriostatic reduction rate (%) is a value calculated as follows.

Reduction of bacillus (%) = (Mb-Mc) x400 / Mb

[Wherein Ma: viable cell count immediately after inoculation of control specimen, Mb: viable cell number after 24 hour culture of control specimen, Mc: viable cell number after 24 hour culture of specimen]

As shown in the above table, the specimen of the present invention showed 99.9% bacterial reduction rate against Staphylococcus aureus and Escherichia coli, and thus, it was judged that the antibacterial resistance as a functional building interior material was excellent (see FIG. 6).

Example 6

Adhesion Test of Polyurethane-PVC Sheet Prepared According to Example 3

The adhesion of the artificial leather coated PVC sheet of the present invention was tested by conventional methods in the art, using the existing wallpaper and the PVC sheet as a control. Specifically, the adhesive force was compared by measuring the peeling degree of the specimen while increasing the applied load on the specimen.

As a result, the existing wallpaper or PVC sheet exhibits an adhesive force between about 0.2 and about 0.3 kgf as shown in the graph of FIG. 7A, whereas the polyurethane coated PVC sheet of the present invention is weak at the first (medium test) measurement. 2.0 to about 3 kgf (FIG. 7B), the secondary (final) measurement shows the adhesion of about 4.0 to 4.5 kgf (FIG. 7C), the polyurethane resin-coated PVC sheet is about 13 compared to the conventional PVC sheet It can be seen that it exhibits a very satisfactory adhesion of more than twice.

Example 7

Design test

Polyurethane-PVC sheet prepared according to Example 3 and the existing PVC sheet was photographed to compare the design. The PVC sheet of the present invention showed excellent design (see Figure 8).

As described in detail through the detailed description and examples of the present invention, the functional PVC artificial leather of the present invention is far superior to the conventional PVC sheet in flame retardant, antimicrobial, durability, stain resistance, tactile improvement, design, etc. Thus, it can be used in various ways such as interiors, furniture, sound equipment cases, such as apartments, indoor interiors, special buildings (hospitals, hotels, department stores, etc.).

Claims (10)

A method of making a functional polyurethane-PVC sheet, comprising: i) mixing a polyurethane resin, a pigment and at least one functional additive to prepare a polyurethane resin composition; ; ii) a first application step of first coating and drying the functional color polyurethane resin composition on a release paper; iii) a second application step of second coating and drying the colored polyurethane resin composition again on the primary coated surface; iv) a kneading step of coating and drying the polyurethane adhesive composition on the secondary coated color polyurethane resin film; v) separately mixing and mixing the PVC resin and the functional additives, and rolling and cooling the kneaded blend to produce a functional PVC sheet; vi) bonding the PVC sheet onto the adhesive film obtained in step iv), then cooling and winding onto a roll; And vii) releasing the release paper after naturally aging the release paper-polyurethane-PVC laminate thus wound. The functional additive of claim 1, wherein the functional additive is one or more selected from the group consisting of antimicrobial agents, deodorants, flame retardants, fouling agents, tactile modifiers, antiwear agents, and the like, which can be easily bonded to polyurethane resins or polyvinyl chloride resins. A manufacturing method characterized by including an additive. The method according to claim 1, wherein the functional additive can be added to at least one of the polyurethane resin composition, the polyurethane resin adhesive, and the PVC resin composition in various mixtures according to the intended use of the final product. A sheet for building interior materials which has good antibacterial, deodorant, flame retardant, fouling resistance, tactile modification, abrasion resistance, and design characteristics and creates a texture and various colors of natural leather. The method of claim 1, wherein the antimicrobial agent that can be easily combined with the polyurethane resin is selected from the group consisting of charcoal, loess, ultrafine silver, and ultrafine anions. The method according to claim 1, wherein the deodorant which can be easily combined with the polyurethane resin includes ceramic or silver. The method of claim 1, wherein the flame retardant that can be easily combined with the polyurethane resin is selected from the group consisting of bromine-based, chlorine-based, iodine-based, fluorine-based, and a mixture of phosphorus and halogen components. The method according to claim 1, wherein the fouling resistant agent which can be easily combined with the polyurethane resin is silicone. The method of claim 1, wherein the tactile modifier that can be easily combined with the polyurethane resin includes petroleum, animal, vegetable, and synthetic waxes. The method according to claim 1, wherein the wear resistant agent which can be easily combined with the polyurethane resin includes silicone or wax.

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