KR102113126B1 - Wallpaper with buffer - Google Patents

Abstract

The present invention relates to a wallpaper containing a buffer, and more specifically, the base material of the conventional wallpaper is a wallpaper due to the calcium carbonate when it contains calcium carbonate as a filler in order to improve physical properties, thereby causing skin disease upon contact. Since there is a possibility of causing, it relates to a wallpaper containing a buffer that can lower the pH of the wallpaper and prevent a pH change that may occur after the wallpaper is installed.

Description

Wallpaper with buffer {Wallpaper with buffer}

The present invention relates to a wallpaper containing a buffer, and more specifically, the base material of the conventional wallpaper is a wallpaper due to the calcium carbonate when it contains calcium carbonate as a filler in order to improve physical properties, thereby causing skin disease upon contact. Since there is a possibility of causing, it relates to a wallpaper containing a buffer that can lower the pH of the wallpaper and prevent a pH change that may occur after the wallpaper is installed.

Decorative products, such as wallpaper, are usually used to protect adherend surfaces, such as wall surfaces, and to impart decorative effects. The general wallpaper was manufactured in a form that laminated a PVC layer on paper, and gave various designs through printing and embossing treatment on the surface of the PVC layer.

Conventionally, the base material of wallpaper may include calcium carbonate, titanium dioxide, clay, kaolin, magnesium carbonate, zinc oxide or silicon oxide as a filler to improve physical properties.

In this case, when calcium carbonate is included as a filler, the price is cheap and the mechanical properties are excellent, but the wallpaper becomes basic and may cause skin diseases when contacted. Basic properties when replacing the calcium carbonate with other raw materials There were disadvantages of lowering and higher costs.

Prior art literature related to conventional wallpaper is Korean Patent Registration No. 10-0886068.

KR 10-0886068 B (Announcement date: February 26, 2009)

The present invention has been devised to solve the above-mentioned problems, and when the base material of the wallpaper contains calcium carbonate as a filler, the wallpaper becomes basic and prevents the possibility of skin diseases that may occur upon contact, and occurs after wallpaper construction. In order to prevent possible pH change, the object is to provide a wallpaper containing a buffer whose pH is neutralized by impregnating the substrate with a solution containing a buffer or by coating with a solution containing a buffer.

In order to achieve the above object, the present invention provides a wallpaper comprising a substrate having a pH of 6.5-7.5.

The wallpaper according to the present invention has the effect of having a neutralized pH without significant process changes by impregnating the substrate with a solution containing a buffer or by coating the substrate with a solution containing a buffer.

In addition, the wallpaper of the present invention has an effect of preventing a pH change that may occur after the wallpaper construction by including a buffer.

The wallpaper according to the present invention has an effect that is less likely to cause skin diseases due to the neutralized pH.

The present invention relates to wallpaper comprising a substrate having a pH of 6.5-7.5.

The substrate may be paper or nonwoven.

The paper may be made of a composition containing 70-90% by weight of cellulose, 5-25% by weight of calcium carbonate and 0.5-10% by weight of moisture, or 75-90% by weight of cellulose, 5-20% by weight of calcium carbonate, and It may be made of a composition containing 1-8% by weight of moisture.

The nonwoven fabric may be made of a composition comprising 60-80% by weight of cellulose, 10-30% by weight of polyester fiber, 3-10% by weight of calcium carbonate, and 1-10% by weight of moisture, or 65-80% by weight of cellulose %, 10-25% by weight of polyester fiber, 5-10% by weight of calcium carbonate and 1-8% by weight of moisture.

When the cellulose content in the paper and non-woven fabric is less than the above range, the water absorption power and wet strength decrease, and when it exceeds the above range, the strength decreases, so it is preferable to use within the above range.

Further, when the content of calcium carbonate in the paper and non-woven fabric is less than the above range, mechanical properties such as strength are deteriorated, and when it exceeds the above range, it is preferable to use it within the above range because it becomes hard due to lack of flexibility.

In addition, when the polyester fiber content in the nonwoven fabric is less than the above range, it becomes hard due to lack of flexibility, and when it exceeds the above range, the content of calcium carbonate is relatively small and mechanical properties such as strength are lowered, so it is preferable to use it within the above range. .

The substrate may be impregnated or coated in a solution containing a buffer.

The buffer is a material capable of buffering in the vicinity of weakly acidic, neutral and weakly basic, and it is preferable to use a chemical that is harmless to the human body, and may include an organic acid and its conjugate base, inorganic acid and its conjugate base or hydrates thereof. .

The organic acid is, for example, citric acid, acetic acid, 2- [N-morpholino] -ethanesulfonic acid (MES), 2-ethane Sulfonic acid (piperazine-N, N-bis (2-ethanesulfonic acid) (PIPES), 2-((tris (hydroxymethyl) methyl) amino) ethanesulfonic acid (2-((tris (hydroxymethyl) methyl) amino) ethanesulfonic acid) (TES), N- (2-hydroxyethyl) -piperazine-N '-(2-ethanesulfonic acid) (N- (2-hydroxyethyl) piperazine-N'-(2-ethanesulfonic acid)) (HEPES), N, N-bis (2-hydroxyethyl) -2-aminoethanesulfonic acid (BES), 3-morpholinopropane It may be at least one member selected from the group consisting of 3-morpholinopropane-1-sulfonic acid (MOPS), histidine and cacodylate.

More specifically, the citric acid is about pH 2.1-7.4, acetic acid is about pH 3.8-5.8, 2- [N-morpholino] -ethanesulfonic acid (MES) is about pH 5.5-6.7, 2-ethanesulfonic acid (PIPES ) Is about pH 6.1-7.5, 2-((tris (hydroxymethyl) methyl) amino) ethanesulfonic acid (TES) is about pH 6.8-8.2, N- (2-hydroxyethyl) -piperazine-N ' -(2-ethanesulfonic acid) (HEPES) is about pH 6.8-8.2, N, N-bis (2-hydroxyethyl) -2-aminoethanesulfonic acid (BES) is about pH 6.4-7.8, 3-mor Polynopropane-1-sulfonic acid (MOPS) can buffer in the range of about pH 6.5-7.9, histidine about pH 5.5-6.5 and cacodylic acid about pH 5.0-7.4.

The inorganic acid may be, for example, one or more selected from the group consisting of phosphoric acid, carbonic acid, and boric acid.

More specifically, the phosphoric acid is about pH 5.8-8.0, carbonate is about pH 6.0-8.0 And boric acid may buffer in the range of about pH 8.5-10.

The base salt of the organic acid and the inorganic acid may be the sodium salt, potassium salt or ammonium salt of the base salt.

In the present invention, preferably, the structure does not change even at a processing temperature of 200-240 ° C., does not generate a fire and does not smell, and at the same time, it is preferable to use an inorganic acid that prevents discoloration, and more preferably, it does not evaporate like moisture. It is preferable to use a buffer, which is an inorganic acid in a solid form remaining in the wallpaper.

The buffer may be included in the solution in 1-20% by weight, preferably 1-10% by weight. If it is less than the above range, the buffering effect is insignificant, and if it exceeds the above range, the cost of the wallpaper increases and the buffering effect decreases due to the increase in viscosity of the solution, so it is preferable to use it within the above range.

The solution may further include a natural binder, and may be, for example, one or more selected from the group consisting of starch, natural rubber latex, and rosin.

The natural binder may be in the form of water dispersion, and may be included in a solution of 5-40% by weight, more preferably 5-30% by weight. If less than the above range, the water retention of the solution decreases, and if it exceeds the above range, the viscosity of the solution increases, so the stability of the viscosity decreases during storage, so it is preferable to use it within the above range.

The solution may further include water, and the water may be included in the solution at 10-60% by weight, preferably 15-60% by weight. If it is less than the above range, the cohesive strength and adhesion of the solution are improved, but the state of impregnation or coated substrate surface is not appropriate, and if it exceeds the above range, the adhesive strength of the composition is lowered and the substrate is dried and dust is dried after a relatively small amount of binder material is used. Since occurrence and cracking are severe, it is preferable to use within the above range.

In addition, the solution may further include at least one selected from the group consisting of dispersants, antifoaming agents, coupling agents, viscosity modifiers, antibacterial agents, lubricants, slip agents, matting agents, and organic pigments as common additives used as additives. In addition, the content of the additive can be used within the content range that does not affect the physical properties of the wallpaper.

The pH of the solution prepared as above may be 4-6.

The wallpaper of the present invention impregnates the base material of the wallpaper with the prepared solution or coats the base material of the wallpaper with the prepared solution, and then sequentially forms a PVC foam layer or a non-foaming layer, a printing layer and a surface treatment layer on the base material And embossed silk wallpaper, or impregnated with paper as the base material of the wallpaper in the prepared solution or laminating several sheets of paper coated with the base material of the wallpaper with the prepared solution and forming a printed layer thereon, then embossing It may be a laminated wallpaper with a pattern.

After impregnation the substrate to the solution may include starch per unit formed on the dried base area (m ²⁾ 1-15g, more preferably, per unit area (m ²⁾ 1-10g. If it is less than the above range, the mechanical properties such as the strength of the substrate and the surface texture decrease, and if it exceeds the above range, it is preferable to use within the above range because the substrate becomes hard due to insufficient flexibility.

The wallpaper according to the present invention has the effect of having a neutralized pH without significant process changes by impregnating the substrate with a solution containing a buffer or by coating the substrate with a solution containing a buffer.

In addition, the wallpaper of the present invention has an effect of preventing a pH change that may occur after the wallpaper construction by including a buffer.

The wallpaper according to the present invention has an effect that is less likely to cause skin diseases due to the neutralized pH.

In the following, preferred embodiments are provided to help the understanding of the present invention, but the following examples are merely illustrative of the present invention, and it is apparent to those skilled in the art that various changes and modifications are possible within the scope and technical scope of the present invention. It is natural that such changes and modifications fall within the scope of the appended claims.

<Example>

1. Solution Preparation

A solution to impregnate the paper as the base material of the wallpaper was prepared using the composition and content shown in Table 1 below.

(Weight g) Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Buffer (Sodium Phosphate, Youngjin Co., Ltd.) 10 - - - Hydrochloric acid (5% HCL) - - 10 - Benzenesulfonic acid - - 10 Natural binder (starch) 30 30 30 30 water 55 55 55 55 Dispersant 3 3 3 3 Antifoam 2 2 2 2

2. Wallpaper production

Example 2

After impregnating the paper containing 80% by weight of cellulose and 20% by weight of calcium carbonate in the solution of Example 1 prepared above, the starch content was 3 g / m ² after drying at 115 ° C. using a drying device chamber. Phosphorus paper was wound up.

After that, after forming a PVC foam layer, a printing layer, and a surface treatment layer, an embossed pattern was applied to produce a silk wallpaper embossed.

Comparative Example 4

After impregnating the paper containing 80% by weight of cellulose and 20% by weight of calcium carbonate in the solution of Comparative Example 1 prepared above, the starch content was 3 g / m ² after drying at 115 ° C. using a drying device chamber. Phosphorus paper was wound up.

After that, after forming a PVC foam layer, a printing layer, and a surface treatment layer, an embossed pattern was applied to produce a silk wallpaper embossed.

Comparative Example 5

After impregnating the paper containing 80% by weight of cellulose and 20% by weight of calcium carbonate as the base material of the comparative example 2 solution prepared above, after drying at 115 ° C. using a drying device chamber, the starch content is 3 g / m ² Phosphorus paper was wound up.

After that, after forming a PVC foam layer, a printing layer, and a surface treatment layer, an embossed pattern was applied to produce a silk wallpaper embossed.

Comparative Example 6

After impregnating a paper containing 80% by weight of cellulose and 20% by weight of calcium carbonate as a base material for the comparative example 3 solution prepared above, the starch content was 3 g / m ² after drying at 115 ° C. using a drying device chamber. Phosphorus paper was wound up.

After that, after forming a PVC foam layer, a printing layer, and a surface treatment layer, an embossed pattern was applied to produce a silk wallpaper embossed.

<Experimental Example>

1.Measurement of pH of substrate (paper) and finished product (wallpaper)

The pH of the substrate (paper) of the wallpaper impregnated with the solutions of Example 1 and Comparative Examples 1-2 prepared above was measured, and the wallpaper of Example 2 and Comparative Example 4-5 including the impregnated substrate (finished product) ) And the results are shown in Table 2 below.

Example 2 Comparative Example 4 Comparative Example 5 Substrate (paper) pH 7 9 7 Wallpaper (finished product) pH 7 9 7

As shown in Table 2 above, the wallpaper of Example 2 and the finished product wallpaper have a neutralized pH (pH 7) due to impregnation in a solution containing an inorganic acid buffer (sodium phosphate), whereas the wallpaper of Comparative Example 4 The base material and wallpaper did not contain acid and showed basicity. In addition, it was confirmed that the base material of the wallpaper of Comparative Example 5 impregnated with a solution containing a strong acid, hydrochloric acid, has a neutralized pH (pH 7), and the wallpaper also has a neutralized pH (pH 7).

2. Measurement of pH change of the finished product (wallpaper) over time

The wallpaper of Example 2 and Comparative Example 4-5 prepared above were measured on the wall surface and the pH after 6 months of time was measured, and the results are shown in Table 3 below.

Example 2 Comparative Example 4 Comparative Example 5 0 day pH 7 9 7 PH after 6 months 7 9.5 8

As shown in Table 3, the wallpaper of Example 2 has a pH change due to the inclusion of a buffer even if the calcium carbonate in the substrate is dissolved by absorbing moisture released into the wall or moisture in the air over a period of 6 months. On the other hand, the wallpaper of Comparative Example 4 showed a higher pH because the substrate did not contain a buffer.

In addition, Comparative Example 5, which is a wallpaper containing a substrate impregnated in a solution containing hydrochloric acid, has no buffering effect and shows a higher pH over time.

3. Measurement of odor and discoloration of finished products (wallpaper)

The odor and discoloration of the wallpaper of Example 2 and Comparative Example 4-6 prepared above were measured, and the results are shown in Table 4 below.

-The smell was evaluated by smelling it directly.

-Discoloration was evaluated by looking at the color change of the wallpaper after 6 months.

Example 2 Comparative Example 4 Comparative Example 5 Comparative Example 6 smell Does not come out Does not come out male male discoloration Unchanged Unchanged Unchanged Change

As shown in Table 4, the wallpaper of Example 2, the finished product wallpaper containing a substrate impregnated in a solution containing an inorganic acid buffer (sodium phosphate) did not smell and the color did not change, while the wallpaper of Comparative Example 4 Does not smell and does not change color, including the substrate impregnated with a solution containing no acid.

In addition, the wallpaper of Comparative Example 5 has an unpleasant odor, including a substrate impregnated with a solution containing a general strong acid, hydrochloric acid, but was not discolored due to the hydrochloric acid, an inorganic acid, and the wallpaper of Comparative Example 6 was impregnated with a solution containing an organic acid. It was confirmed that it smells unpleasant and changes color as well.

Claims (18)

As a wallpaper containing a substrate with a pH of 6.5-7.5,
The substrate is a paper or non-woven fabric impregnated or coated with a solution containing a buffer. delete According to claim 1,
The paper is a wallpaper made of a composition comprising 70-90% by weight of cellulose, 5-25% by weight of calcium carbonate and 0.5-10% by weight of moisture. According to claim 1,
The non-woven fabric is a wallpaper made of a composition comprising 60-80% by weight of cellulose, 10-30% by weight of polyester fiber, 3-10% by weight of calcium carbonate, and 1-10% by weight of moisture. delete According to claim 1,
The buffering agent is an organic acid and its conjugate base, an inorganic acid and its conjugate base or a hydrate thereof. The method of claim 6,
The organic acid is citric acid, acetic acid, 2- [N-morpholino] -ethanesulfonic acid (MES), 2-ethanesulfonic acid (piperazine) -N, N-bis (2-ethanesulfonic acid) (PIPES), 2-((tris (hydroxymethyl) methyl) amino) ethanesulfonic acid (2-((tris (hydroxymethyl) methyl) amino) ethanesulfonic acid) ( TES), N- (2-hydroxyethyl) -piperazine-N '-(2-ethanesulfonic acid) (N- (2-hydroxyethyl) piperazine-N'-(2-ethanesulfonic acid)) (HEPES), N, N-bis (2-hydroxyethyl) -2-aminoethanesulfonic acid (BES), 3-morpholinopropane-1-sulfur Wallpaper of at least one member selected from the group consisting of 3-morpholinopropane-1-sulfonic acid (MOPS), histidine and cacodylate. The method of claim 6,
The inorganic acid is a wallpaper that is at least one selected from the group consisting of phosphoric acid, carbonic acid and boric acid. The method of claim 6,
The wallpaper base of the organic acid and inorganic acid is a sodium salt, potassium salt or ammonium salt of the conjugate base. According to claim 1,
The buffer is a wallpaper that is contained in 1-20% by weight in the solution. According to claim 1,
The solution is a wallpaper that further comprises at least one natural binder selected from the group consisting of starch, natural rubber latex and pine resin. delete The method of claim 11,
The natural binder is a wallpaper that is included in the solution in 5-40% by weight. According to claim 1,
The solution is wallpaper, which further comprises 10-60% by weight of water. According to claim 1,
The solution is a wallpaper that further comprises at least one additive selected from the group consisting of dispersants, antifoaming agents, coupling agents, viscosity modifiers, antibacterial agents, lubricants, slip agents, matting agents and organic pigments. The method according to any one of claims 1, 3, 4, 6 to 11 or 13 to 15,
The solution is wallpaper that is pH 4-6. According to claim 1,
The wallpaper is a silk wallpaper or a lamination wallpaper. According to claim 1,
The substrate is a wallpaper containing 1-15 g of starch per unit area (m ² ).