KR200339696Y1 - Environmental friendly wallpaper - Google Patents

Abstract

The present invention is an environmentally friendly aqueous solution prepared from a liquid inorganic filler, an aqueous foaming agent of isobutane or normal pentane, a binder composed of an acrylic resin and styrene-butadiene latex, a pulp powder, an anti-sticking agent, and / or a wallpaper coating made of a far infrared ray emitting material. The present invention relates to a wallpaper, and provides an environmentally friendly aqueous wallpaper that can express the texture and formability similar to that of a PVC wallpaper even by manufacturing the wallpaper by coating the coating on a base paper.

Description

Eco friendly wallpaper {Environmental friendly wallpaper}

The present invention relates to an eco-friendly wallpaper. More specifically, the present invention relates to a wallpaper manufactured by using a wallpaper coating agent having improved physical properties by using a liquid inorganic filler and a binder composed of an acrylic resin and a styrene-butadiene latex mixture.

Wallpapers are classified into paper wallpaper, synthetic wallpaper, and textile wallpaper depending on the material, but not only products that are themselves synthetic resins such as silk wallpaper and foam wallpaper, but also paper wallpaper are synthetic chemicals used in printing inks and varnishes, Toxic substances, etc., may be volatilized and volatilized in the synthetic pool used for papering. These toxic gases can cause loss of motivation, headaches, dizziness and insomnia, asthma, and hypersensitivity to other stimuli. Therefore, efforts have recently been made to develop eco-friendly wallpaper that minimizes the generation of such toxic substances.

Particularly, foam wall paper among synthetic resin wall paper is widely used due to heat insulation, heat insulation, and sound insulation. However, since it is impossible to emboss, it is produced by adding it to the original paper by a roll screen method, and as a general PVC (polyvinyl chloride) wallpaper It does not give the texture and formability.

Since PVC is a hard material, it is commercialized after increasing flexibility and elasticity by using a phthalic acid plasticizer (DOP, etc.) or adipic acid plasticizer. However, plasticizers used at this time have been identified as endocrine disorders that cause liver and kidney disorders and reproductive malformations at home and abroad. Therefore, PVC wallpaper has good texture and formability, but its use is expected to decrease gradually due to problems caused by plasticizers.

In addition, PVC wallpaper is treated as a slitting waste in the edge of the wallpaper production process, causing environmental pollution by incineration of the waste, landfill, and because the wallpaper manufacturing process proceeds at high temperature It is uneconomical in that it requires fuel collection and requires a dust collector which must collect plasticizer during operation.

Accordingly, the present inventors have attempted to make embossable wallpaper, which is similar in texture and formability to PVC wallpaper but is economical and harmless to the human body by manufacturing wallpaper using environmentally friendly materials. However, the aqueous coating has a lower fluidity than the conventional PVC coating, there is a problem of poor foaming and formability, to overcome these disadvantages, the present inventors have a liquid inorganic filler and a binder composed of acrylic resin and styrene-butadiene latex Was used. Therefore, the wallpaper according to the present invention is a liquid inorganic filler and a binder composed of acrylic resin and styrene-butadiene latex, isobutane or normal pentane-based water-based foaming agent, cellulose-based pulp powder which is a hardness increasing agent, anti-sticking agent and far-infrared radiation coating agent The coating agent prepared by mixing the additives is used.

It is an object of the present invention to provide a wallpaper coated with a suitable coating agent so as to manufacture an environmentally friendly water-based wallpaper that is less harmful while using an existing PVC wallpaper production line.

Another object of the present invention is to provide an environmentally friendly wallpaper that has good texture and formability, such as PVC wallpaper, but is simple in manufacturing and less harmful to the human body.

Another object of the present invention is to improve the disadvantage that the powder inorganic material for the manufacture of wallpaper causes a sudden increase in the viscosity of a large amount of dust and the wallpaper coating agent, so that it is not possible to obtain a uniform dispersion when the coating agent is injected due to the decrease in dispersion and entanglement of the sol state. It is to provide a wallpaper coated with a coating prepared using a filler.

Another object of the present invention is to coat with a coating agent prepared by adding a binder mixed with acrylic resin and styrene-butadiene in order to reduce the degree of foaming, reduce the primary drying time and thereby reduce the cost, reduce the residual adhesiveness and improve moldability To provide a wallpaper.

Still another object of the present invention is to provide an environmentally friendly wallpaper that has good texture and formability, such as PVC wallpaper, but is simple in manufacturing process and less harmful to human body.

1 is a general process diagram for producing a foam wallpaper.

2 is a cross-sectional view of the wallpaper according to the present invention.

10: base layer 20: coating agent coating layer 30: printing layer

The present invention relates to a wallpaper coated with an aqueous coating agent that improves fluidity, foamability, and moldability by using a liquid inorganic filler and a binder composed of an acrylic resin and styrene-butadiene latex. More specifically, the present invention is coated with a liquid inorganic filler, an isobutane or normal pentane-based aqueous foaming agent, a binder composed of acrylic resin and styrene-butadiene latex, pulp powder, anti-sticking agent, and / or a coating agent composed of far-infrared radiation material. Provide wallpaper.

In the present invention, a suitable coating agent is manufactured to manufacture an environmentally friendly environmentally friendly aqueous wallpaper using a conventional PVC wallpaper production line.

Hereinafter, the components of the coating agent according to the present invention will be described in more detail.

Inorganic filler

In the present invention, an inorganic filler (inorganic substance) having good light resistance and heat resistance, less generation of toxic gases during combustion, and flame retardancy is used. Inorganic fillers include calcium carbonate, kaolin, silica, talc and the like, and the most preferred inorganic filler is heavy calcium carbonate. Inorganic fillers are generally used in powder form until now, but it is difficult to evenly disperse the blowing agent when using powdered inorganic materials. In order to disperse the inorganic filler, it is necessary to disperse high-speed rotation, which makes it easy to wear expensive equipment and short life. There is also a downside in economics. In order to solve this problem and to improve the texture and formability, and to supplement the roughness of the base paper, the present invention uses a liquid inorganic material that serves as a filler.

It is preferable to use the liquid inorganic filler in an aqueous solution of 50 to 90%.

Liquid inorganic fillers have a disadvantage in that even when powdered inorganic fillers are used, a large amount of dust is generated and a sudden increase in viscosity of the sol (walling coating solution) (50000 cPs or more) results in poor dispersion and entanglement of the sol state. It can be improved.

The content of the liquid inorganic filler is 30 to 60% by weight based on the total weight of the coating agent. When the inorganic filler is added in less than 30% by weight, it prevents the non-uniform side of the base paper and does not function properly as a filler to improve the gelling of the product, resulting in non-uniformity of the gelling surface layer and the foamed surface and unevenness of the foaming degree, Reduce the stiffness of the product. On the other hand, when added to 60% by weight or more due to the excessive inorganic substances, low dispersion, viscosity unevenness, and cracking of the resin after gelling and foaming due to the sol compounding worsens the physical properties of the product.

bookbinder

The binder is used by mixing an acrylic resin and styrene-butadiene latex (SB Latex). The binder according to the present invention is used 30 to 50% by weight based on the total weight of the coating agent, the mixing ratio of the two components is most preferably 6: 1 to 12: 1 by weight.

If the weight ratio of the component is less than 6: 1, there is a problem that can not give the maximum formability during embossing due to the high elasticity of styrene-butadiene latex. On the other hand, when the weight ratio of the components exceeds 12: 1, since the relatively relatively high acrylic resin is contained, the advantages of styrene-butadiene latex is halved there is a problem that can not obtain the physical properties to be obtained in the present invention.

The wallpaper treated with the coating agent according to the present invention by adding the binder has a product surface hardness and scratchability similar to that of the existing PVC wallpaper.

The styrene-butadiene latex may be replaced with a polymer selected from urethane-based resin, EVA (ethylene-vinyl acetate copolymer), or ABS (acrylonitrile-butadiene-styrene copolymer) used as a general binder.

In general, binders are selected by the glass transition temperature (Tg) which is not a problem in the two main processes (gelling process and foaming process) in the production of wallpaper, and is injected according to the characteristics of the synthetic resin.

If the Tg is too low, it remains sticky, causing contamination of the guide roll during the work, and rewinding the gelling product after the gelling work during off-line work that requires separate gelling and foaming, and blocking during transport and loading. Sticking to each other's sides and tearing them).

If the Tg is too high, the embossing due to the cured film layer may cause poor patterning or cracking of the finished product. For this reason, it is important to select an appropriate Tg value of the binder.

When the acrylic resin having a Tg of -50 to -30 ° C is used alone, the resin cracking phenomenon and the degree of foaming required during the foaming operation are good, but due to the low Tg of the resin, Geling operation) The drying speed is slow and sticky due to acrylic resin remains on the gelling surface.

When using an acrylic resin with a Tg of -25 to 10 ° C alone, the drying speed is high and the adhesiveness is good during the gelling operation, but the resin film burst occurs, and the foaming degree required during the foaming operation is -50 ~. The acrylic resin at -30 ° C was lower than when used alone.

Therefore, in the present invention, a mixture of acrylic resin and styrene-butadiene latex is used to manufacture a product which improves the degree of foaming, shortens the first drying time and thereby reduces the cost, reduces residual adhesiveness, and improves the foam surface and embossing. do.

In this case, it is possible to prepare a coating that can exhibit a texture and formability similar to that of PVC wallpaper than when two or more kinds of acrylic resins having different glass transition temperatures are mixed. Acrylic resins include all binders commonly used in the manufacture of wallpaper coatings, which are well known to those skilled in the art.

Styrene-butadiene latex, a component of the binder, has the property that styrene gloss the gelling surface layer, butadiene provides excellent flexibility, adhesion and elasticity. Due to these properties, it speeds up the drying speed during sol-gel work for wallpaper production, reduces the sticking and cracking of the resinous surface layer and foaming surface, which is a problem in general processes, and foaming work. It has a high foaming degree and has a uniform foam surface, and can realize the maximum moldability in the embossing process.

Water-based blowing agents

As the aqueous blowing agent, isobutane, normalpentane, or a mixture thereof is used, and even dispersion in the sol state of the isobutane or the normal foaming agent of the aqueous foaming agent is necessary to obtain an even foamed surface of the wallpaper. If it is not evenly dispersed, it is impossible to obtain even sides in the first drying (gelling) and the second drying (foaming).

In the present invention, isobutane, normal pentane, or a mixture thereof is used as a blowing agent in order to select a blowing agent meeting the drying temperature required for the production of wallpaper, and an acrylonitrile copolymer is produced so that chlorine gas (Cl ₂ ) is not generated during combustion. It is possible to use a microcapsule form composed of the outer shell of the family.

The content of the aqueous blowing agent is 1 to 6% by weight, based on the total weight of the coating. If the aqueous blowing agent is added in less than 1% by weight, the desired degree of foaming cannot be obtained, and if it exceeds 6% by weight, non-uniformity of the foam surface due to high foaming is caused, which is uneconomical.

Pulp powder

In the present invention, by using the cellulose-based pulp powder increases the hardness of the product and gives room humidity control function.

The content of pulp powder is 1 to 4% by weight based on the total coating weight.

Pulp powder has a strong affinity with water to increase the swelling of the fiber by water, thereby improving the flexibility of the fiber and thus the inter-fiber bonding. It also functions to prevent the deformation of the gelling surface layer by increasing the bonding between fibers during gelling drying.

If the pulp powder content is added below 1% by weight, the desired hardness cannot be obtained, and when it is added above 4% by weight, the efficiency is lowered.

Adhesive

In order to reduce the surface adhesion (stickiness) of the wallpaper product produced by the coating as much as possible to impart releasability, an anti-sticking agent is added. The anti-sticking agent prevents contamination of the guide roll during production of the product due to the stickiness of the coating liquid.

Anti-sticking agents include those commonly used in the manufacture of wallpaper coating liquid, silicone or butyl acrylate (BA) acrylic copolymer is most used.

The content of the anti-sticking agent is 0.5 to 2% by weight based on the total coating weight.

Far Infrared Radiation

In the present invention, it is possible to add a far infrared ray emitting material as needed. Far infrared radiation materials include jade, ocher, illite, elvan, germanium, charcoal powder, or mixtures thereof.

The far-infrared radiation material is a material that has already been verified as a far-infrared radiation material through various research literatures. The addition of such far-infrared radiation to the wallpaper coating (sol) can help the human health by emitting far-infrared radiation in the interior space.

The amount of far-infrared radiation added is preferably 6% by weight or less based on the total weight of the coating liquid.

If the far-infrared radiation material exceeds 6% by weight, the unit price of the product increases and there is a difficulty in dispersing the coating liquid due to the excessive input of the powder.

Other additives

In addition to the above components, surfactants, wetting agents, brighteners, dispersants, antifoaming agents, thickeners, and / or pH adjusting agents which can be generally added in the preparation of wallpaper coating solution may be further added. Specific components and contents of each additive can be easily determined by those skilled in the art. Generally, the additive is added in the range of 0.02 to 3% by weight, based on the total coating weight.

Surfactants are used to improve sol fluidity and surface layer gel phenomena. The amount of the surfactant added is preferably 0.05 to 0.25% by weight based on the total weight of the coating liquid. When the surfactant is added more than 0.25% by weight, a large amount of bubbles are generated in the sol, and the surface layer of the product is not uniform during the first drying (gelling) and the second drying (foaming) process. Can not get

In addition, when manufacturing a wallpaper using a coating agent, the comma cotta method is most commonly used when applying a high viscosity coating solution among the various coating methods for the gelling operation. A wetting agent is used to evenly coat the base paper. The preferred amount of wetting agent is 0.5 to 2% by weight, based on the weight of the coating liquid.

In addition, the brightener is used to prevent the whiteness of the product when the product is finished

And titanium dioxide is generally used. The preferred amount of brightener is 0.5 to 3% by weight based on the weight of the coating liquid.

Alcohol

The alcohol may be further added for reasons of improving the lubricity of the gelling surface layer and the fluidity of the sol in the compounding. Suitable alcohol content is 5% by weight or less based on total coating weight. As alcohol, lower alcohols having 5 or less carbon atoms are used, of which methanol or ethanol is most preferred.

In one embodiment of the present invention, the coating agent is 30 to 60% by weight of liquid calcium carbonate, 30 to 50% by weight of a binder (acrylic resin, styrene-butadiene latex), 1 to 6% by weight of an aqueous foaming agent consisting of isobutane and normalpentane, pulp Powder 1 to 4% by weight, 0.5 to 2% by weight of anti-sticking agent, 6% by weight or less of far-infrared radiation substance, 0.5 to 3% by weight of brightener, 0.5 to 2% by weight of wetting agent, 0.05 to 0.25% by weight of surfactant, 0.1 to 0.5 dispersant Weight percent, antifoaming agent 0.1-0.5 weight percent, and alcohol 2 weight percent.

On the other hand, the final viscosity of the coating agent (sol) is most suitable to uniform the gelling surface layer and the foamed surface during the gelling and foaming process in the wallpaper coating formulation is 2000 ~ 3000cPs, the thickness and the best foaming surface of the most suitable gelling layer in the above viscosity range Foaming degree can be obtained.

The coating solution prepared as described above may be coated and dried on a common wallpaper paper to produce an environmentally friendly aqueous wallpaper.

For the production of wallpaper, the coating amount of the coating agent on the base paper is preferably 150 to 300 dry g / m ² , the coating thickness is most preferably 0.3 ~ 0.6mm (wet).

The oil-based coating agent for PVC wallpaper becomes soft at high temperature after the foaming process, so that the pattern is easily formed even at low pressure. However, the water-based coating agent according to the present invention has a relatively low foaming rate and less voids in the coating layer than the foaming agent used in PVC wallpaper. Because of the low pressure (10kg / cm ² or less) when embossing has a problem that the pattern is easily restored. Therefore, in order to have embossing similar to PVC wallpaper using the water-based foaming agent according to the present invention, the engraving roll (patterning roll) is set to a high pressure (10 kg / cm ² or more) and a high back roll is used. It is good to choose.

The wallpaper manufacturing process follows the general manufacturing process of coating, drying and molding the coating on a base paper. A general wallpaper manufacturing process is disclosed in FIG.

A cross-sectional view of the wallpaper completed according to the invention is disclosed in FIG. 2.

On the base paper layer 10 of the wallpaper, a coating layer 20 coated with a coating agent prepared according to the present invention is obtained, and a printing layer 30 is formed by a printing process after gelling drying.

On the other hand, in order to provide a flame-retardant wallpaper, by mixing 20-30 parts by weight of inorganic aluminum hydroxide to 100 parts by weight of the coating agent according to the present invention is coated on a flame-retardant base paper. The specific process is the same as the eco-friendly aqueous wallpaper of the present invention.

Through the following examples, the present invention will be described in more detail.

The following examples are intended to illustrate the present invention, thereby the scope of the invention

Is not limited.

Example

Example 1

40 g of a binder prepared by mixing 80 g of an aqueous 80% calcium carbonate solution, 36 g of acrylic resin (Tg -50 ° C, BA acrylic copolymer), and 4 g of styrene-butadiene latex (Tg 2-4 ° C), 5 g of isobutane and normal pentane aqueous foaming agent To prepare a coating agent, 1 g of pulp powder (J.RETTENMAIEA SOHNE, AROBO CELL BE600 / 30PU), and 1 g of an anti-sticking agent (Daedeok polymer, butyl acrylate (BA) acrylic copolymer) were mixed.

Example 2

40 g of a binder prepared by mixing 80 g of an aqueous 80% calcium carbonate solution, 36 g of acrylic resin (Tg -50 ° C, BA acrylic copolymer), and 4 g of styrene-butadiene latex (Tg 2-4 ° C), 5 g of isobutane and normal pentane aqueous foaming agent , Pulp powder 2g (J.RETTENMAIEA SOHNE product, AROBO CELL BE600 / 30PU), Anti-sticking agent (Daedeok polymer product, Butyl acrylate (BA) acrylic copolymer) 1g, Oxygen 4g (Myeongjin Mining), Whitening agent (titanium dioxide: DuPont, plastic pigment) 3g, wetting agent (ethylene glycol) 1g, surfactant (EFKA, EFKA-3580, polysiloxane) 0.1g, dispersant (BYK, BYK-154, ammonium salt of acrylate copolymer) 0.2 g, and an antifoaming agent (EFKA, EFKA-2526, Emulsion of organic polymer organic metal-compounds) were mixed to prepare a coating agent.

Example 3

A coating agent was prepared in the same manner as in Example 2, except that an acrylic resin having a Tg of −20 ° C. was used as the acrylic resin of the binder.

Comparative Example 1-2

In the case of using liquid calcium carbonate, a coating agent was prepared using powdered calcium carbonate in order to show better dispersibility than powdered calcium carbonate and to confirm that the gelling and foaming surfaces were good. In Comparative Examples 1 and 2, except that 40g of powdered calcium carbonate and 10g of water were separately added, coating agents were prepared according to Examples 2 and 3, respectively.

Comparative Example 3-6

In the case of using acrylic resin and styrene-butadiene latex as binders, only acrylic resin was used in Comparative Examples 3 and 4 in order to confirm that cracking and stickiness of the coated surface was reduced and moldability was improved compared to using acrylic resin alone. Used as. Except this, a coating agent was prepared in the same manner as in Example 2. In Comparative Examples 5 and 6, in order to confirm the effect when the blending ratio of the acrylic resin and the styrene-butadiene latex in the binder exceeds the proper range (6: 1 to 12: 1), the weight ratio of the two components is 3: 1 ( A coating agent was prepared according to Example 2, except that the mixture was used in Comparative Example 5) or 19: 1 (Comparative Example 6).

The compounding quantity of the binder component in each Example and the comparative example is shown in Table 1.

The coating solution blended according to Examples 1 to 3 and Comparative Examples 1 to 6 was coated on a raw paper in a comma coater and then subjected to a first drying (gelling) operation. At this time, the coating amount was 200 dry g / ㎡, the coating thickness was 0.5mm wet. After that, the desired pattern was printed, and the wallpaper was obtained through foaming and pressing.

The physical properties of the produced wallpaper were measured and shown in Table 1 below.

The degree of foaming was calculated as follows.

Foaming degree = (thickness of coating layer after foaming) ÷ (thickness of coating layer after gelling)

In addition, the prepared wallpaper was observed to measure the cracking, stickiness, gelling and foaming surface state, embossability.

Binder content (g) Bursting Sticky Geling and Foam Surface Condition Embossing Geling drying time (100 ℃, sec) Firing degree A ²⁾ B ³⁾ C ⁴⁾ Example One 36 4 O O O O 85 2.3 2 36 4 O O O O 80 2.4 3 36 4 △ O O O 70 2.0 Comparative Example 1 ¹⁾ 36 4 O O X O 80 2.4 2 ¹⁾ 36 4 △ O X O 70 2.0 3 40 O X O O 120 2.2 4 40 X O O △ 80 1.8 5 30 10 O O O X 70 2.5 6 38 2 O X O O 90 2.2

O: Good △: Medium X: Poor

1) Powdered calcium carbonate added

2) A: Acrylic resin with Tg of -50 ~ -30 ℃

3) B: acrylic resin with Tg of -25 ~ 10 ℃

4) C: Styrene-butadiene latex having a Tg of 2 to 4 ° C.

In the case of using a binder having a high Tg, the drying time is shortened and the stickiness is less during the gelling operation. However, the film bursts and the degree of foaming becomes low. On the other hand, when a low Tg binder is used, there is less membrane bursting and foaming is good, but stickiness and drying time are relatively increased. In order to compensate for this, in the present invention, styrene-butadiene latex is mixed with the acrylic resin binder, and thus the overall film bursting, foaming degree, drying time, and stickiness properties are advantageous. The degree of foaming is an indicator of patterned three-dimensional effect during embossing. When only acrylic resin having a high glass transition temperature (Tg) is used as the binder, as in the case of Comparative Example 4, the degree of foaming was 1.8 and thus the desired three-dimensional feeling could not be expressed. .

On the other hand, even when the two kinds of binders used in the case of mixing in the optimum ratio range (Examples 1 to 3) it was confirmed that the embossing formation is better or less sticky than the case of Comparative Examples 5 to 6.

Even when the same binder is used, when the powder-type inorganic filler is used, the foaming agent is not evenly dispersed, and thus the foamed surface is not good (Comparative Examples 1 and 2).

According to the above results, it is preferable to use a liquid calcium carbonate according to the present invention, and to use a binder in which styrene-butadiene latex is mixed with the acrylic resin binder in order to achieve the best effect in accordance with the physical properties for producing excellent wallpaper. I could confirm it.

The present invention has the effect of providing an environmentally friendly water-based wallpaper with little risk while using the existing PVC wallpaper production line. This effect uses a liquid inorganic material to improve the disadvantage that the powder inorganic material for wallpaper production causes a sudden increase in the viscosity of a large amount of dust and wallpaper coating agent, resulting in uneven dispersion during sol state dispersion and entanglement. It is obtained by adding a binder mixed with acrylic resin and styrene-butadiene latex in order to reduce the foaming degree, the primary drying time and thereby reduce the cost, reduce the remaining adhesiveness, and improve the moldability. Therefore, the coating agent prepared according to the present invention, like the PVC wallpaper, the texture and formability is good, but the manufacturing process is simple, and provides an environmentally friendly wallpaper with less harm to the human body.

Claims (8)

A wallpaper prepared by applying a coating agent comprising a liquid inorganic filler and a binder composed of an acrylic resin and styrene-butadiene latex to a wallpaper paper, drying and molding. Liquid inorganic fillers; A binder composed of an acrylic resin and styrene-butadiene latex; Aqueous foaming agents selected from isobutane, normalpentane, or mixtures thereof; Pulp powder; And a wallpaper produced by applying a coating agent consisting of an anti-sticking agent to a base paper for wallpaper, drying and molding. The wallpaper of claim 1 or 2, wherein the coating further comprises a far-infrared radiation material selected from jade, loess, illite, elvan, germanium, charcoal powder, or mixtures thereof. The wallpaper of claim 1 or 2, wherein the coating further comprises one or two or more of a surfactant, wetting agent, brightener, dispersant, antifoaming agent, thickener, or pH adjusting agent. The wallpaper of claim 1 or 2, wherein the inorganic filler is an aqueous calcium carbonate solution of 50 to 90%. The wallpaper of claim 1 or 2, wherein the binder is a mixture of acrylic resin and styrene-butadiene latex in a weight ratio of 6: 1 to 12: 1. The wallpaper of claim 1 or 2, wherein the final viscosity of the coating agent is 2000-3000 cPs. The wallpaper according to claim 1 or 2, wherein the coating amount is 150 to 300 dry g / m ² .