KR101630413B1 - Manufacturing method of coating agent treated fiber wallpaper for prevent release formaldehyde - Google Patents

Abstract

According to the present invention, fiber wallpaper is produced by using a fiber material such as a fiber raw yarn or a fabric cloth. Formaldehyde generated from an adhesive used during the production of the fiber wallpaper is prevented from released, and high quality environmentally-friendly processed fiber wallpaper having an excellent insulation effect is produced. A production process thereof is simplified, so reduction in costs and enhancement of productivity may be expected. As a means to solve such a problem, according to the present invention, wallpaper is obtained by performing side grafting on a fiber material such as raw yarns made of various materials or cloths, and a urea mixture is coated on the outer surface of the wallpaper. Then, during a drying process, a condensation reaction is performed on formaldehyde remaining on the wallpaper, so the formaldehyde is substituted by urea-formaldehyde which is a thermosetting resin. Accordingly, formaldehyde may be prevented from being released. In addition, an insulation function is provided by means of a nano-mixed powder consisting of nano-metal oxide and nano-silica, and a dew condensation preventing function may be imparted.

Description

Technical Field [0001] The present invention relates to a method for manufacturing a coated fiber wallpaper in which a coating agent is treated to prevent the release of formaldehyde,

The present invention relates to a process for producing a fiber wallpaper using a fiber material such as a fiber yarn or a woven fabric to prevent the release of formaldehyde generated from the adhesive used in the production of the fiber wallpaper and to produce an eco- And at the same time, it is possible to expect cost reduction and productivity improvement by simplifying the manufacturing process.

Generally, wallpaper is used as a method of attaching wallpaper to a cement wall surface treated with plaster. It absorbs moisture generated from the wall surface, and is widely used for the purpose of keeping warm, soundproofing and interior.

Since the wallpaper is made of an adhesive mainly composed of PVC synthetic resin during the manufacturing process, plasticizers, stabilizers and the like are added together with an organic solvent harmful to the human body, so chemicals such as formaldehyde, which are harmful to the human body, It is widely recognized that this problem is sick house syndrome.

Thus, a number of techniques are being provided to prevent the release of harmful substances such as formaldehyde, which are released from wallpaper.

Considering the prior art for preventing the emission of harmful substances emitted from wallpaper, Japanese Patent Laid-Open No. 10-0732174 entitled " Method for producing wallpaper coated with a biomaterial and a wallpaper produced thereby "(patent document 1) 10-1167527 "Functional wallpaper" (Patent Document 2) and Japanese Patent No. 10-1224038 "High functional natural synthetic wall finishing composition" (Patent Document 3).

In the case of manufacturing the wallpaper, it is considered that when the weight ratio of citric acid: phytoncide is 2: 2, the weight ratio of methanol: pine tree is 40:60 to 60:40, : 1 to prepare an additive to control the addition of the coating agent; coating the backside of the wallpaper with the coating agent at 8 to 12 g / m < 2 > and attaching the paper; and drying the coated wallpaper with hot air, Ability to decompose harmful substances such as formaldehyde and antimicrobial activity.

When examining the technical contents of Patent Document 2, pretreatment and cationization of the dyes are carried out through pretreatment of a bath and a cationizing agent composition in which water, a nonionic scouring agent and a cationizing agent are formed at a certain ratio, and water, mineral salts, The dyed dyed dyes are dyed through a saline composition composed of a certain ratio of anionic acrylic binder and nonionic silicone softener selected from fatty acid emulsions, anionic dispersants, anionic high temperature type acrylic binders and anionic low temperature type acrylic binders, And is provided on the surface of the earthing ground so as to provide a functional wallpaper which is beneficial to the human body due to the far-infrared radiation effect.

The present invention also relates to an eco-friendly highly functional fiber wallpaper composition capable of reducing the harmful substances emitted from wallpaper by examining the technical contents of Patent Document 3, wherein 30 to 35 parts by weight of phytoncide powder, 10 to 15 parts by weight of vegetable pine needle liquid extract, To obtain an eco-friendly highly functional fibrous wallpaper composition comprising 12 to 17 parts by weight of a natural zeolite powder, 5 to 10 parts by weight of an antimicrobial agent, 5 to 10 parts by weight of an anion-generating tourmaline mineral, 3 parts by weight of sodium silicate and 3 parts by weight of potassium silicate, To the fiber wallpaper.

The inventors of the present invention have studied the technical contents of the above Patent Documents 1 to 3 and have found that it is possible to apply environmentally friendly wallpaper by applying a coating agent composed of various compositions on the outer surface of a wallpaper to reduce harmful substances emitted from the adhesive used in the production of wallpaper, The manufacturing process is complicated and various compositions have to be mixed at a specific ratio, resulting in difficulty in operation and an increase in cost.

Korean Patent No. 10-0732174 entitled " Method of manufacturing wallpaper coated with a bio material and wallpaper produced thereby " Korean Patent No. 10-1167527 "Functional wallpaper" Korean Patent No. 10-1224038 "High Functional Natural Synthetic Wall Finishing Composition" Korean Patent Publication No. 10-2015-0137316 entitled " Process for the production of coated wallpaper treated with a coating agent for preventing the release of formaldehyde "

The present invention has been made to overcome the above-mentioned disadvantages of the prior art and to reduce the release of formaldehyde generated from the adhesive used in the production of fiber wallpaper, to produce an environmentally friendly fiber wallpaper with excellent heat insulation effect, In the future.

The problems to be solved by the present invention are not limited to those mentioned above, and other problems to be solved can be clearly understood by those skilled in the art from the following description.

As a means for solving the problems of the present invention as described above, a method for producing a processed fiber wallpaper in which a coating agent for preventing the formaldehyde emission is treated according to the present invention is characterized in that a fiber material 30 is taken out from a creel 11 The wallpaper 20 wound around the wallpaper supply roller 26 is taken out and the immersion roller 23 in the adhesive tank 21 constituted on one side of the first drying cylinder 41 is taken out The wallpaper 20 and the fibrous material 30 are bonded to each other in the first drying cylinder 41 so that the adhesive agent 22 is applied to the wallpaper 20, The wallpaper 20 and the fibrous material 30 are wound around the take-up roller 46 by drying the second drying cylinder 42 and the third drying cylinder 43 and drying the wall- (40), and the fiber wallpaper (40) is installed on the draw-out portion (60) formed in the coating apparatus, so that the fiber wallpaper (40) The fibrous wallpaper 40 drawn out to the coating portion 70 is passed through the dipping roller 73 constituted in the coating tank 71 so as to be coated on the outer surface of the fibrous wallpaper 40, And then the fibrous wallpaper 40 is drawn out to the drying section 80 while the first drying cylinder 72 is applied to the drying section 80 81 and the second drying is carried out in the second and third drying cylinders 82 and 83 so that the formaldehyde contained in the adhesive agent and the elements contained in the coating agent 72 undergo condensation reaction to form urea formaldehyde resin So that the urea formaldehyde resin is thermally cured while passing through the fourth drying cylinder 84 and the fiber wallpaper 40 is wound on the winding roller 91 of the winding section 90, 3 to 5 parts by weight of urea powder per 100 parts by weight of the binder; And 3 to 5 parts by weight of a nano-mixed powder, wherein the nano-mixed powder comprises nano-metal oxide and nano-silica, wherein the nano-metal oxide is formed as a core and the nanosilica having a mesoporous structure Shell structure which forms a surrounding shell.

According to the method for producing a processed fiber wallpaper treated with a coating agent for preventing formaldehyde emission according to the present invention having the above-described structure, a fiber wallpaper is produced using a fiber material such as a fiber yarn or a fabric, It is possible to manufacture high quality and environmentally friendly processed fiber wallpaper with excellent heat insulation effect and prevent the release of formaldehyde generated from the adhesive used, and to prevent the release of formaldehyde, which can be expected to reduce costs and improve productivity by simplifying the manufacturing process The present invention can provide a method for producing a processed fiber wallpaper in which the treated fiber wallpaper is treated.

The effects attained by the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a device for manufacturing a wallpaper of the present invention.
Fig. 2 is an enlarged view of the adhesive tank portion of Fig. 1; Fig.
Fig. 3 is a device for coating and drying an urea mixture on a fiber wallpaper produced through the apparatus of Fig. 1; Fig.
Fig. 4 is an enlarged view of the coating tank portion in Fig. 3; Fig.
5 is a conceptual view showing a configuration for replacing a dipping roller and a pressing roller with a padding roller;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the following description. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Accordingly, it is to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like numbers refer to like elements throughout.

The present invention utilizes the basic configuration of Korean Patent Application No. 10-2015-0137316, which is a prior application of the applicant of the present invention, as a part of the prior art document, 0137316. Therefore, some of the technical structures of the present invention described below are partially duplicated in the structure disclosed in Korean Patent Laid-Open No. 10-2015-0137316, and the features will be described separately.

The present invention is characterized in that there is a characteristic difference in the components constituting the 'coating agent', the 'drying step' of the coating agent, and the coating method of the adhesive or the coating agent disclosed in Korean Patent Publication No. 10-2015-0137316. And the improved portion constitutes the main essential structural features of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic structural view of an apparatus for producing a fiber wallpaper 40 by joining a wallpaper 20 and a fiber material 30 to fabricate the fiber wallpaper 40 to be provided in the present invention, The present invention is directed to a device for manufacturing a fiber wallpaper 40 by coating an urea mixture on the outer surface of a fiber wallpaper 40 manufactured through a device of the present invention. A fibrous wallpaper 40 is obtained by bonding a fibrous material 30 such as a fabric fabric with an adhesive 22 to coat the outer surface of the fibrous wallpaper 40 with a coating agent 72 composed of an urea mixture, (40) in which formaldehyde is not released.

A manufacturing apparatus for the fiber wall paper 40 will be described.

A first density body 31 and a second density body 32 are provided in front of the creel 11 and a second density body 32 is provided on the rear side of the second density body 32, The second drying cylinder 42 and the third drying cylinder 43 are arranged side by side and the winding roller 46 and the wallpaper supply roller 26 are installed behind the third drying cylinder 43. [

An adhesive tank 21 filled with an adhesive 22 is provided at one side of the first drying cylinder 41. A dipping roller 23 is installed in the adhesive tank 21 and a pressing roller 24 Install it.

A manufacturing process of the fiber wallpaper 40 using the apparatus will be described.

A fiber material 30 made of a yarn is drawn out from a bobbin or a cylinder provided in the creel 11 and then passed through the first density body 31 and the second density body 32 to form a first drying cylinder 41 .

The wallpaper 20 wound around the wallpaper supply roller 26 is guided to the dipping roller 23 provided in the adhesive tank 21 via the guide roller 27 to apply the adhesive 22 to the wallpaper 20 And the wallpaper 20 to which the adhesive 22 is applied passes through the upper pressing roller 24 so that the excessively adsorbed adhesive 22 is squeezed and removed.

The wallpaper 20 passed through the pressing roller 24 is a fiber yarn drawn out from the creel 11 while being pulled out to the first drying cylinder 41 and kept at a constant density by the second density body 32, The fibrous material 30 is bonded to the surface of the wallpaper 20 at a constant density.

The wallpaper 20 may be provided with various colors and patterns, and the fiber yarns constituting the fiber material 30 may be made of materials having various thicknesses and colors.

The wallpaper 20 and the fibrous material 30 in the first drying cylinder 41 are firmly bonded and dried while passing through the second drying cylinder 42 and the third drying cylinder 43, The wall paper 20 is wound on the winding roller 46 to complete the manufacture of the fiber wallpaper 40.

The fabric material 30 to be bonded to one side of the wallpaper 20 in the course of manufacturing the fiber wallpaper 40 may be a fabric fabric other than a fiber fabric.

When a fabric material is used as the fabric material 30, a roller (not shown) wound with a fabric material is installed at the position of the crease 11, and the fabric material is taken out to the first drying cylinder 41 , And to be joined to the wallpaper 20 supplied to one side.

Therefore, in manufacturing the fiber wallpaper 40, the fiber material 30 to be bonded to one side of the wallpaper 20 may be a fiber yarn or a fabric material.

A coating apparatus for coating a coating agent 70 made of an urea resin mixture on the outer surface of the fiber wallpaper 40 manufactured as described above will be described.

3, the coating apparatus includes a draw portion 60, a coating portion 70, a drying portion 80, and a winding portion 90. The drawing portion 60 is formed of a fiber wallpaper Up roller 62 on which the roller 40 is wound.

The coating section 70 fills the coating agent tank 72 with a urea mixture in the coating tank 71 and the dipping roller 73 and the pressing roller 71 are installed in the coating tank 71.

In the present invention, the coating material 72 composed of the urea mixture is composed of urea powder and nano-mixed powder, and more specifically, 3 to 5 parts by weight of urea powder per 100 parts by weight of the binder; And 3 to 5 parts by weight of a nano-mixed powder.

The elemental powder provides the function of removing formaldehyde. That is, the formaldehyde of the adhesive used in the production of the fiber wallpaper 40 is subjected to a condensation reaction with the urea powder to be replaced with urea formaldehyde resin and removed. The amount of the urea powder is preferably 3 to 5 parts by weight based on 100 parts by weight of the binder. When the amount of the urea powder is less than 3 parts by weight, formaldehyde contained in the fiber wallpaper 40 adhesive is not sufficiently reacted (condensation reaction) If the amount of the urea powder exceeds 5 parts by weight, the urea powder which does not react due to excessive use of the urea powder remains in the form of particles.

The nano-mixed powder is composed of a nano-metal oxide and nano-silica, the nano-metal oxide provides the heat insulation performance, the nano silica reduces the thermal conductivity to maximize the heat insulation effect, and the durability of the coating layer itself is improved.

The nano-mixed powder may provide a function of heat insulation and may also provide functions such as prevention of condensation. More specifically, the nano-mixed powder may include at least one of antimony-doped tin oxide (ATO), indium tin oxide (ITO), aluminum zinc oxide (AZO), cesium tungsten oxide : CTO), and further comprising nanosilica, wherein the nano-metal oxide is formed as a core and the outer portion is formed as a mesoporous structure. And more preferably a core-shell structure in which nano silica forms a shell surrounding it. In the case where the nano-metal oxide and the nanosilica are made of a core-shell structure, the effect of heat insulation and dew condensation prevention can be maximized and improved.

The amount of the nano-mixed powder is preferably 3 to 5 parts by weight based on 100 parts by weight of the binder. When the amount of the nano-mixed powder is less than 3 parts by weight, the effect of preventing significant heat insulation and dew condensation can not be obtained. The increase in the effect is insignificant, while the adhesion and durability are rapidly decreased.

Generally, methods for preparing core-shell structure particles include imprinting method, associate phase seperation, coaxial electrospraying, aerosol-assisted self- However, in the present invention, the nano-mixed powder of the core-shell structure may be prepared by a self-assembly method using an aerosol.

Specifically, the self-assembly method using the aerosol uses tetraethyl orthosilicate and methyltriethoxysilane as precursors of nanosilica, cetyltrimethylammonium bromide as a surfactant, tin oxide as a nano metal oxide, and a mixture of ethylene and water as a solvent Solution, and then aerosol droplets are made using a spraying device, and these are dried and calcined to remove the surfactant.

The drying unit 80 includes a first drying cylinder 81, a second drying cylinder 82, a third drying cylinder 83 and a fourth drying cylinder 84. Guide rollers 66 are installed in the drying cylinders, Respectively.

The winding portion 90 is provided with a winding roller 91, and then the processed fiber wallpaper 100 processed by the winding roller 91 is wound.

The process of coating the element mixture of the fiber wallpaper 40 using the apparatus will be described.

The fiber wallpaper 40 is pulled out from the drawing roller 62 provided on the drawing portion 60 so that the guide roller 66 is supplied to the coating portion 70 via light.

The fibrous wallpaper 40 drawn to the coating portion 70 is coated on the outer surface of the fibrous wallpaper 40 with a coating agent 72 composed of urea mixture passing through the dipping roller 73 provided in the coating tank 71, The excess coating agent 72 is squeezed and removed.

The fibrous wallpaper 40 on which the coating agent 72 is applied to the surface of the surface of the fibrous wallpaper 40 passing through the pressing roller 74 is fed to the first to fourth drying cylinders at a speed of 10 m per minute via the guide roller 66, And the formaldehyde reacts with the coating agent 72 made of polyvinylidene fluoride.

The reaction process of the coating agent 72 coated on the fibrous wallpaper 40 passing through the first to fourth drying cylinders will be described below. When the preliminary drying is performed in the first drying cylinder 81, The coating agent of the mixture becomes semi-dry and the formaldehyde of the adhesive agent used in manufacturing the fiber wallpaper 40 and the elements added to the coating agent 72 through the second and third cylinders 82 and 83 are condensed To replace the urea formaldehyde resin.

In this state, the urea formaldehyde resin is thermally cured by passing again through the fourth drying cylinder 84 to solidify the shape, thus inhibiting the release of the formaldehyde contained in the adhesive.

The coating agent 72 coated on the outer surface of the fiber wallpaper 40 passes through the first through fourth drying cylinders and is thermally cured while being replaced with urea formaldehyde resin. Roller 91 to prevent the release of formaldehyde to be provided in the present invention, the production of the coated fiber wall paper 100 treated with the coating agent is completed.

The drying temperature in the first drying cylinder is preferably 80 to 90 ° C, and the drying temperature in the second to fourth drying cylinders is preferably 105 to 115 ° C (about 110 ° C). By setting the drying temperature in the first drying cylinder to 80 to 90 ° C and lowering the drying temperature in the second to fourth drying cylinders (about 110 ° C), the nanomixing powder is partially semi-dried and stabilized, This is because the powder is uniformly dispersed in the coating layer so that the heat insulating performance can be exerted more effectively and smoothly.

In the present invention, as shown in FIG. 5, by replacing the dipping rollers 23 and 73 and the pressing rollers 24 and 73 with a padding roller in applying the adhesive 22 or the coating agent 72 Can be configured.

That is, in the step of applying the adhesive 22 or the coating agent 72 to the wallpaper, the application amount can be adjusted by changing and replacing the dipping rollers 23 and 73 with padding type rollers, It is more preferable that the rollers 24 and 74 are not used.

Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the scope of the present invention is not limited by the following examples.

The fibrous material 30 is pulled out from the creel 11 to be drawn out to the drying cylinder 41 and the wallpaper 20 wound around the wallpaper feeding roller 26 is drawn out and is fed to one side of the first drying cylinder 41 The adhesive agent 22 is applied to the wallpaper 20 after passing through the dipping roller 23 in the constructed adhesive tank 21 so as to be drawn out to the first drying cylinder 41, The wallpaper 20 and the fibrous material 30 are joined to each other and dried while passing through the second drying cylinder 42 and the third drying cylinder 43. The wallpaper 20 and the fibrous material 30 And the fibrous wallpaper 40 is provided on the draw-out portion 60 formed in the coating apparatus so that the fibrous wallpaper 40 is wound on the coating portion 70 The fibrous wallpaper 40 drawn out to the coating portion 70 passes through the dipping roller 73 constituted in the coating tank 71 and the coating agent 72 made of an urea mixture is formed on the outer surface of the fibrous wallpaper 40 And then the fibrous wallpaper 40 is drawn out to the drying section 80 while the preliminary drying is performed in the first drying cylinder 81. In this case, Dried and dried in the second and third drying cylinders 82 and 83 to cause the formaldehyde contained in the adhesive and the elements contained in the coating agent 72 to undergo a condensation reaction to be replaced with urea formaldehyde resin, The fiber wall paper 40 is wound around the winding roller 91 of the winding section 90 so that the urea formaldehyde resin is thermally cured while passing through the fourth drying cylinder 84. As a result, .

Here, the coating material 72 composed of the urea mixture may contain 3 to 5 parts by weight of urea powder per 100 parts by weight of the binder; And 3 to 5 parts by weight of a nano-mixed powder. The nano-mixed powder is prepared by a self-assembling method using an aerosol to prepare a nano-mixed powder having a core-shell structure. Antimony-doped tin oxide : ATO) was used, mesoporous nanosilica was used as a shell, and the drying temperature in the first to fourth drying cylinders was about 110 캜.

A processed fiber wallpaper was prepared in the same manner as in Example 1, except that the drying temperature in the first drying cylinder was 80 to 90 ° C and the drying temperature in the second to fourth drying cylinders was set to about 110 ° C.

[Comparative Example 1]

The fibrous material 30 is pulled out from the creel 11 to be drawn out to the drying cylinder 41 and the wallpaper 20 wound around the wallpaper feeding roller 26 is drawn out and is fed to one side of the first drying cylinder 41 The adhesive agent 22 is applied to the wallpaper 20 after passing through the dipping roller 23 in the constructed adhesive tank 21 so as to be drawn out to the first drying cylinder 41, The wallpaper 20 and the fibrous material 30 are joined to each other and dried while passing through the second drying cylinder 42 and the third drying cylinder 43. The wallpaper 20 and the fibrous material 30 Was wound around the take-up roller 46 to obtain a fiber wallpaper 40. That is, as a comparative example according to the first to second embodiments, a general wallpaper not coated with the coating material 72 made of an urea mixture is shown as a comparative example.

[Test Example 1] Formaldehyde removal performance test

Table 1 shows the results of analysis of the formaldehyde emission amount with respect to the wallpaper of Examples 1 to 2 and Comparative Example 1 using a formaldehyde measuring apparatus.

(Unit: ppm) Example 1 Example 2 Comparative Example 1 Formaldehyde Emission 0 0 0.47

[Test Example 2] Insulation performance test

The insulation performance of the wallpaper of Examples 1 to 2 and Comparative Example 1 was tested.

A 45 cm x 20 cm x 45 cm sized closed box was prepared as an experimental apparatus. The wall and ceiling of the box were coated with the wallpaper of Examples 1 to 2 and Comparative Example 1, and the electric floor heating device was installed on the bottom of the box. The latent heat was measured after the electric plate was turned on and the temperature was set at 35 캜. The latent heat was measured after 60 minutes, 120 minutes and 240 minutes after turning off the electric plates after 120 minutes.

(Unit: ℃) division Example 1 Example 2 Comparative Example 1 60 minutes 27 30 23 120 minutes 25 28 22 240 minutes 23 26 21

As can be seen from the above Tables 2 and 3, it can be seen that the treated fiber wallpaper treated with the coating agent for preventing the release of formaldehyde according to the present invention of Examples 1 and 2 is superior in heat insulation performance there was. In particular, it was confirmed that the case of drying the first drying cylinder at a drying temperature of 80 to 90 ° C is more excellent in the heat insulating performance than the case of not drying.

As described above, according to the present invention having the above-described structure, the formaldehyde component of the adhesive used in the production of the fiber wallpaper is coated with a coating agent composed of an urea mixture and heat-treated to be replaced with urea formaldehyde resin, that is, replaced with a thermosetting resin, When fiber wallpaper is used, the release of formaldehyde is left to provide a high-quality fiber wallpaper that is not harmful to human body, and the nano-mixed powder composed of nano-metal oxide and nano silica provides heat insulation performance And can provide a processed fiber wallpaper capable of imparting functions such as prevention of dew condensation.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken in conjunction with the limitations of the invention, It is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present invention should be construed as including all embodiments falling within the scope of the appended claims.

11: Creil 20: wallpaper
21: Adhesive tank 22: Adhesive
23: dipping roller 24: pressing roller
26: wallpaper supply roller 27: guide roller
30: fiber material 31: first density body
32: second density body 40: fibrous wallpaper
41: first drying cylinder 42: second drying cylinder
43: third drying cylinder 46: winding roller
60: lead portion 61: frame
62: pull-out roller 66: guide roller
70: coating part 71: coating tank
72: coating agent 73: dipping roller
74: pressing roller 80: drying section
81: first drying cylinder 82: second drying cylinder
83: third drying cylinder 84: fourth drying cylinder

Claims (3)

The fibrous material 30 is pulled out from the creel 11 to be drawn out to the drying cylinder 41 and the wallpaper 20 wound around the wallpaper feeding roller 26 is drawn out and is fed to one side of the first drying cylinder 41 The adhesive agent 22 is applied to the wallpaper 20 after passing through the dipping roller 23 in the constructed adhesive tank 21 so as to be drawn out to the first drying cylinder 41, The wallpaper 20 and the fibrous material 30 are joined to each other and dried while passing through the second drying cylinder 42 and the third drying cylinder 43. The wallpaper 20 and the fibrous material 30 And the fibrous wallpaper 40 is provided on the draw-out portion 60 formed in the coating apparatus so that the fibrous wallpaper 40 is wound on the coating portion 70 The fibrous wallpaper 40 drawn out to the coating portion 70 passes through the dipping roller 73 constituted in the coating tank 71 and the coating agent 72 made of an urea mixture is formed on the outer surface of the fibrous wallpaper 40 And then the fibrous wallpaper 40 is drawn out to the drying section 80 while the preliminary drying is performed in the first drying cylinder 81. In this case, Dried and dried in the second and third drying cylinders 82 and 83 to cause the formaldehyde contained in the adhesive and the elements contained in the coating agent 72 to undergo a condensation reaction to be replaced with urea formaldehyde resin, The fourth formaldehyde resin is thermally cured while passing through the fourth drying cylinder 84 so that the fibrous wallpaper 40 is wound on the winding roller 91 of the winding section 90,
The coating material 72 composed of the urea mixture may contain 3 to 5 parts by weight of urea powder per 100 parts by weight of the binder; And 3 to 5 parts by weight of a nano-mixed powder,
The nano-mixed powder is a core-shell structure comprising nano-metal oxide and nano-silica, the nano-metal oxide being formed as a core, and the nanosilica having a mesoporous structure as an outer shell forming a shell Characterized in that a coating agent is applied to prevent the release of formaldehyde. The method according to claim 1,
The nano-mixed powder may include at least one of antimony-doped tin oxide (ATO), indium tin oxide (ITO), aluminum zinc oxide (AZO), cesium tungsten oxide (CTO) And at least one nano-metal oxide selected from the group consisting of nano-silica and nano-silica, and further comprising nano-silica. The method according to claim 1,
Wherein the drying temperature in the first drying cylinder is from 90 to 100 캜 and the drying temperature in the second to fourth drying cylinders is from 105 to 115 캜. Gt;

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