KR102436619B1 - Eco-friendly foaming wallpaper and method for preparing the same - Google Patents

Abstract

The present invention relates to an eco-friendly foamed wallpaper and a method for manufacturing the same, and more particularly, at least one olefin resin selected from the group consisting of a polyolefin elastomer (POE) resin, a thermoplastic polyurethane (TPU) resin, and an ethylene vinyl acetate (EVA) resin, and 100 parts by weight of a base resin containing PLA resin; 30 to 150 parts by weight of an inorganic filler; fluorine-based or polyalkylene glycol-based processing aids; And it relates to an eco-friendly foamed wallpaper comprising a resin foam layer formed including a compatibilizer, and a method for manufacturing the same.
According to the present invention, the effect of providing an eco-friendly foamed wallpaper and a method for manufacturing the same, which contain plant-derived components, which has high eco-friendliness and carbon dioxide reduction effects, water resistance, flexibility, and printability of equal or greater, and greatly improved processability, foaming quality and workability there is

Description

Eco-friendly foamed wallpaper and manufacturing method thereof

The present invention relates to an eco-friendly wallpaper and a method for manufacturing the same, and more particularly, it contains plant-derived components, which has a high eco-friendliness and carbon dioxide reduction effect, while water resistance, flexibility and printability are equal or higher, and processability, foaming quality and workability are significantly higher. It relates to an improved eco-friendly foamed wallpaper and a manufacturing method thereof.

Conventional PVC wallpaper is a wallpaper in which PVC resin is coated on paper, which has a smooth surface texture like silk and is the most popular wallpaper.

However, these PVC wallpapers emit environmentally harmful substances such as CO ₂ and are not easily decomposed in the natural environment even when discarded, so they are far from eco-friendly, which is a recent trend.

There have been attempts such as applying bio-resin to develop eco-friendly wallpaper, but bio-resin has strong hydrophilic properties, so foaming quality and processability are poor during foaming. There was a problem in that water resistance, flexibility and workability were deteriorated due to unstable shrinkage rate.

In addition, when the wallpaper is installed during the winter season, the wallpaper is hardened, making it difficult to install, and the surface of the wallpaper is not flat, resulting in poor printability.

Therefore, there is a need to develop a wallpaper that is environmentally friendly and has improved foaming quality, processability, water resistance, flexibility, workability, and printability.

Korean Patent Registration No. 10-0467775

In order to solve the problems of the prior art as described above, the present invention contains plant-derived components, which has a large effect on eco-friendliness and carbon dioxide reduction, while water resistance, flexibility and printability are equal or higher, and processability, foaming quality and constructability are greatly improved. An object of the present invention is to provide a wallpaper and a method for manufacturing the same.

The above and other objects of the present invention can all be achieved by the present invention described below.

In order to achieve the above object, the present invention provides a base layer; Polyolefin Elastomer (POE) resin, TPU (Thermoplastic polyurethane) resin and EVA (Ethylene vinyl acetate) resin foam layer formed including a base resin comprising at least one olefin resin and PLA resin selected from the group consisting of; And it provides a foamed wallpaper comprising a printed layer.

The foaming layer is preferably a fluorine-based or polyalkylene glycol-based processing aid in the base resin; and a compatibilizer.

The present invention preferably includes 100 parts by weight of a base resin comprising at least one olefin resin and PLA resin selected from the group consisting of POE (Polyolefin Elastomer) resin, TPU (Thermoplastic polyurethane) resin, and EVA (Ethylene vinyl acetate) resin; 30 to 150 parts by weight of an inorganic filler; fluorine-based or polyalkylene glycol-based processing aids; and a resin foam layer formed including a compatibilizer.

In addition, the present invention preferably includes 100 parts by weight of a base resin comprising 65 to 85% by weight of an olefin resin and 15 to 35% by weight of a bio resin; 30 to 120 parts by weight of an inorganic filler; 0.1 to 9 parts by weight of a fluorine-based or polyalkylene glycol-based processing aid; And it can provide a foamed wallpaper comprising a resin foam layer formed by including 0.1 to 5 parts by weight of a compatibilizer.

The base resin preferably contains 65 to 80% by weight of the olefin resin and 20 to 35% by weight of the bioresin, more preferably 70 to 80% by weight of the olefin resin and 20 to 30% by weight of the bioresin, further Preferably, it contains 70 to 75% by weight of an olefin resin and 25 to 30% by weight of a bio-resin.

The resin foam layer may preferably contain 0.1 to 5% by weight of a lubricant, more preferably 0.5 to 3% by weight, still more preferably 0.5 to 2% by weight, even more preferably 0.5 to 1.5% by weight can be

The lubricant may preferably be a fatty acid-based lubricant, more preferably a saturated fatty acid having 12 to 24 carbon atoms, more preferably a saturated fatty acid having 12 to 20 carbon atoms, and even more preferably a saturated fatty acid having 16 to 20 carbon atoms. , Specific examples include stearic acid, lauric acid, and the like, and a preferred example is stearic acid.

The olefin resin may preferably be at least one selected from the group consisting of a polyolefin elastomer (POE) resin, a thermoplastic polyurethane (TPU) resin, and an ethylene vinyl acetate (EVA) resin, and more preferably a polyolefin elastomer (POE) resin. .

The bio-resin may preferably be PLA (Poly Lactic Acid).

The inorganic filler may be preferably 30 to 120 parts by weight.

The inorganic filler may preferably be calcium carbonate, titanium dioxide or a mixture thereof, more preferably a mixture of calcium carbonate and titanium dioxide,

The inorganic filler may preferably contain calcium carbonate and titanium dioxide in a weight ratio of 2:1 to 10:1, more preferably 3:1 to 9:1 by weight, still more preferably 4:1 to 8 It is a weight ratio of :1.

The fluorine-based processing aid may be preferably a polytetrafluoroethylene (PTFE) resin.

The fluorine-based processing aid may be preferably 0.5 to 8 parts by weight, more preferably 1 to 7 parts by weight, more preferably 2 to 6 parts by weight, and most preferably 3 to 5 parts by weight.

The polyalkylene glycol-based processing aid may preferably be a polyalkylene glycol-alkyl (meth)acrylate copolymer.

The polyalkylene glycol-based processing aid may be preferably 0.1 to 5 parts by weight, more preferably 0.1 to 3 parts by weight, more preferably 0.5 to 2 parts by weight, even more preferably 0.6 to 1.5 parts by weight. , most preferably 0.6 to 1.0 parts by weight.

The compatibilizer may be preferably a glycidyl (meth)acrylate-based compatibilizer, and more preferably an ethylene-glycidyl (meth)acrylate copolymer, glycidyl (meth)acrylate-ethylene-octene. copolymer, ethylene-n-butylacrylate-glycidyl (meth)acrylate copolymer, ethylene-methylacrylate-glycidyl (meth)acrylate copolymer and styrene glycidyl (meth)acrylate copolymer at least one selected from the group consisting of, more preferably a glycidyl methacrylate-based compatibilizer, and more preferably an ethylene-glycidyl methacrylate copolymer, glycidyl methacrylate-ethylene- selected from the group consisting of octene copolymers, ethylene-n-butylacrylate-glycidyl methacrylate copolymers, ethylene-methylacrylate-glycidyl methacrylate copolymers and styrene glycidyl methacrylate copolymers. more than one

In the present description, (meth)acrylate is used as a term referring to both methacrylate and acrylate.

The resin foam layer may not include a PVC resin, and more preferably, the foamed wallpaper of the present invention is a PVC _- free foamed wallpaper that does not contain a PVC resin. And it has a more eco-friendly advantage by excluding PVC resin, which is not easily decomposed in a natural environment, even when discarded.

The resin foam layer may preferably have a foaming ratio of 180% or more, more preferably 220% or more, more preferably 230% or more, and most preferably 240% or more, and specifically, 180 to 300%, preferably An example is 220 to 280%, a more preferable example is 230 to 260%, and a more preferable example is 240 to 250%.

The foamed wallpaper may include a base layer, a resin foaming layer, and a printed layer in sequence.

The base layer preferably contains at least 75% by weight of pulp, cellulose, or a mixture thereof; and 25% by weight or less of PET fibers, more preferably 85 to 100% by weight of pulp, cellulose, or a mixture thereof; and 0 to 15% by weight of PET fibers, more preferably 90 to 100% by weight of pulp, cellulose, or a mixture thereof; and 0 to 10% by weight of PET fibers, specific examples of which include 75 to 90% by weight of pulp, cellulose, or a mixture thereof; and 10 to 25% by weight of PET fibers.

The base layer may be preferably imitation paper, non-woven fabric or cotton fabric, more preferably non-woven fabric.

The base layer may preferably have an immersion shrinkage rate of 2% or less, more preferably 1.5% or less, and still more preferably 1% or less, calculated by Equation 1 below.

[Equation 1]

Immersion shrinkage = [(length of base layer before immersion - length of base layer after immersion)/length of base layer before immersion] X 100

Specifically, the immersion shrinkage rate can be measured after immersing the specimen and removing the water immediately after taking it out under conditions of a specimen size of 200 x 200 mm, water as an immersion liquid, immersion time of 1 hour, and immersion temperature at room temperature (20 to 23 ° C). Preferably, it can be calculated as an average value by measuring at least three times.

The foamed wallpaper is preferably measured under the conditions of a specimen size of 200 x 200 mm, water as an immersion liquid, immersion time of 1 hour, and immersion temperature at room temperature, and the immersion shrinkage rate of the base layer is the immersion shrinkage rate calculated by Equation 1 above. It may be 80 to 120% of the immersion shrinkage of the layer. Here, the meaning that the immersion shrinkage ratio of the base layer is 80 to 120% of the immersion shrinkage ratio of the foam layer means that it is calculated as “(immersion shrinkage ratio of the foam layer/immersion shrinkage ratio of the base layer) X 100”.

The foamed wallpaper may include at least one selected from the group consisting of an adhesive layer, a second base layer and a partially foamed layer, wherein the adhesive layer is located under the base layer, and the second base layer is It is located under the adhesive layer, and finally, the partially foamed layer may be located on the printed layer.

The foamed wallpaper is preferably a wallpaper specimen with a width of 1,060 mm, 10 to 50 g/m2 of wallpaper paste (starch material) is applied to the wallpaper substrate, aged for 1 hour, and then installed by attaching it to the wall. The shrinkage ratio calculated by the following Equation 3 may be 2% or less, more preferably 0.1 to 2%, and more preferably 0.5 to 1%.

[Equation 3]

Wallpaper shrinkage rate = [(Wallpaper width before installation - wallpaper width after installation)/Wallpaper length before installation] X 100

In addition, the present invention preferably includes at least one olefin resin and PLA resin selected from the group consisting of POE (Polyolefin Elastomer) resin, TPU (Thermoplastic polyurethane) resin, and EVA (Ethylene vinyl acetate) resin Base resin: Inorganic filler ; fluorine-based processing aids; compatibilizer; and 0.5 to 10 parts by weight of a chemical foaming agent and foaming at a foaming ratio of 180% or more to prepare a resin foaming layer.

In addition, the present invention is preferably POE (Polyolefin Elastomer) resin, TPU (Thermoplastic polyurethane) resin, and EVA (Ethylene vinyl acetate) resin 100 parts by weight of a base resin comprising at least one olefin resin and PLA resin selected from the group consisting of ; 30 to 150 parts by weight of an inorganic filler; fluorine-based processing aids; compatibilizer; and 0.5 to 10 parts by weight of a chemical foaming agent and foaming at a foaming ratio of 180% or more to prepare a resin foaming layer.

In addition, the present invention preferably includes 100 parts by weight of a base resin comprising 65 to 85% by weight of an olefin resin and 15 to 35% by weight of a bio resin; 30 to 120 parts by weight of an inorganic filler; 0.1 to 9 parts by weight of a fluorine-based or polyalkylene glycol-based processing aid; 0.1 to 5 parts by weight of compatibilizer; and 0.5 to 10 parts by weight of a chemical foaming agent and foaming at a foaming ratio of 180% or more to prepare a resin foaming layer.

According to the present invention, the effect of providing an eco-friendly foamed wallpaper and a manufacturing method thereof with plant-derived components containing plant-derived components and having a large effect on eco-friendliness and carbon dioxide reduction, water resistance, flexibility and printability of equal or greater, and with greatly improved processability, foaming quality and workability have.

1 is an exploded cross-sectional view schematically showing a wallpaper including a conventional PVC foam layer.
2 is an exploded cross-sectional view schematically illustrating a wallpaper including a conventional natural resin layer.
3 is an exploded cross-sectional view schematically showing a wallpaper including a natural resin foam layer of the present invention.

Hereinafter, the wallpaper of the present substrate and a manufacturing method thereof will be described in detail.

The present inventors commercialize the glycidyl methacrylate-based base resin in a foamed wallpaper including a base layer, a natural resin foam layer and a printed layer, and the natural resin foam layer in a base resin containing a bio resin and an olefin resin in a predetermined weight ratio. In the case of manufacturing by including a certain amount of acrylic modified polytetrafluoroethylene (PTFE), eco-friendliness and carbon dioxide reduction effects are large, and processability, foaming quality, water resistance, flexibility, workability and printability, which were not previously solved, are greatly improved. It was confirmed that the foamed wallpaper was manufactured, and based on this, the present invention was completed.

In another preferred example, the wallpaper of the present invention includes a base layer, a natural resin foaming layer, and a printed layer, wherein the natural resin foaming layer contains a bio-resin and an olefin resin in a weight ratio of 15:85 to 30:70. 100 parts by weight of the base resin; 1 to 5 parts by weight of a glycidyl methacrylate-based compatibilizer; And characterized in that it consists of a foaming composition comprising 2 to 9 parts by weight of acrylic modified polytetrafluoroethylene (PTFE), and in this case, plant-derived components are contained so that the eco-friendliness and carbon dioxide reduction effect are large while water resistance, flexibility and printing It has the effect of significantly improving the properties of the same or higher, and the workability, foaming quality and workability are greatly improved.

Hereinafter, the wallpaper of the present invention will be described in detail for each configuration.

base layer

The base layer of the present invention may be located at the bottom of the wallpaper, for example, and may be attached to the wall through an adhesive.

The base layer may be preferably 100% pulp, or pulp containing 10 to 30% by weight of PET fibers.

The base layer may be, for example, imitation paper, non-woven fabric or cotton fabric, and more preferably, non-woven fabric.

The imitation paper is a Western-style paper with strong, tough and glossy quality mainly used as printing paper, and it is not particularly limited if it is imitation paper commonly used in the technical field to which the present invention belongs within the limit that satisfies the definition of the present invention.

The nonwoven fabric may refer to a fabric shape in which fibers are combined with each other by chemical action, mechanical action, or heat treatment with appropriate moisture, the fiber aggregate without a weaving process such as spinning, weaving, or knitting, for example.

The base sheet may have, for example, a basis weight of 50 to 200 g/m ² , and has excellent workability within this range.

Natural resin foam layer

The natural resin foam layer of the present invention may be positioned on the base layer, for example.

The natural resin foaming layer preferably includes 100 parts by weight of a base resin comprising a bio-resin and an olefin resin in a weight ratio of 15:85 to 30:70; 1 to 5 parts by weight of a glycidyl methacrylate-based compatibilizer; and 2 to 9 parts by weight of acrylic-modified polytetrafluoroethylene (PTFE) as a processing aid; in this case, eco-friendliness and carbon dioxide reduction effect are large, and water resistance, flexibility, workability and printability There is an improvement advantage.

The base resin includes, for example, a bio-resin and an olefin resin in a weight ratio of 15:85 to 30:70, preferably 20:80 to 30:70, and more preferably 15:75 to 30:70 by weight. Within this range, there is an advantage of minimizing embossing that occurs during distribution of the finished wallpaper, realizing excellent embossing restoration power, and improving the workability in winter.

As a specific example, when the olefin resin is included in an amount of less than 65% by weight based on 100 parts by weight of the base resin, the embossed during distribution of the finished wallpaper due to the high hardness bioresin may cause problems in appearance and difficulties in winter construction. , If it contains more than 85% by weight, there may be a problem that the embossing is not stamped during the manufacturing process due to the high elasticity of the olefin resin.

The bio-resin is, for example, PLA (Poly Lactic Acid) resin, Starch, Bio-PE (Bio-Polyethylene) resin, Bio-TPU (Bio-Thermoplastic Polyurethane) resin, cellulose, chitin, PHA resin, PVA resin, It may be at least one selected from the group consisting of PBS resin, PBAT resin and PCL resin, preferably PLA (Poly Lactic Acid) resin, Bio-PE (Bio-Polyethylene) resin and Bio-TPU (Bio-Thermoplastic Polyurethane) resin It is at least one selected from the group consisting _of There is an eco-friendly advantage that can be easily decomposed under the environment.

The PLA resin may be, for example, a thermoplastic polyester of lactic acid or lactide.

The starch may be, for example, raw starch such as corn starch, wheat starch, or rice starch, or processed starch such as acetic acid esterified starch, methyl etherified starch, or amylose.

The Bio-PE resin may be prepared by, for example, extracting ethanol from sugar cane.

The Bio-TPU resin may be prepared by, for example, extracting a polyol from sugar cane.

The olefin resin may be, for example, at least one selected from the group consisting of POE (Polyolefin Elastomer) resin, TPU (Thermoplastic polyurethane) and EVA resin (Ethylene vinyl acetate), and in this case, the impact strength and flexibility at low temperature are excellent. have.

The glycidyl methacrylate-based compatibilizer may be included, for example, in an amount of 1 to 5 parts by weight, preferably 1 to 3 parts by weight, based on 100 parts by weight of the base resin, and between the bio-resin and the olefin resin within the above range. It has the advantage of excellent processability and mechanical properties by improving the compatibility by the surface active action.

The acrylic-modified polytetrafluoroethylene (PTFE) may be included, for example, in an amount of 2 to 9 parts by weight, preferably 2 to 7 parts by weight, more preferably 3 to 5 parts by weight, based on 100 parts by weight of the base resin. , there is an effect excellent in workability within this range.

The acrylic modification is not particularly limited in the case of acrylic modification as commonly defined in the technical field to which the present invention belongs, and a specific example is that the terminal of the polytetrafluoroethylene is modified with acrylic, or an acrylate monomer is added to polytetrafluoroethylene. may mean that is grafted.

The polyalkylene glycol-based processing aid may be, for example, a polyalkylene glycol-based processing aid commonly used in the technical field to which the present invention belongs, preferably a polyalkylene glycol-alkyl (meth)acrylate copolymer. may be, and in this case, there is an excellent effect of processability.

The polyalkylene glycol may be preferably polyethylene glycol, polypropylene glycol, or a mixture thereof, more preferably polypropylene glycol, and in this case, excellent processability is obtained.

The alkyl (meth) acrylate is preferably an alkyl (meth) acrylate having 1 to 10 carbon atoms in the alkyl group, more preferably a (meth) acrylate having 4 to 10 carbon atoms in the alkyl group, still more preferably 4 carbon atoms in the alkyl group. to 8 alkyl (meth)acrylates.

Specific examples of the alkyl (meth) acrylate include butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, octyl (meth) acrylate, 2-ethylhexyl ( It may be at least one selected from the group consisting of meth) acrylate, nonyl (meth) acrylate, isononyl (meth) acrylate, and decyl (meth) acrylate, and preferred examples include butyl acrylate, 2-ethylhexyl (meth)acrylate or a mixture thereof, and a more preferred example is a mixture of butyl acrylate and 2-ethylhexyl (meth)acrylate, and in this case, excellent processability is obtained.

In the present description, (meth)acrylate is used in the sense of including both acrylate and methacrylate.

The polyalkylene glycol-based processing aid may be preferably 0.1 to 5 parts by weight, more preferably 0.1 to 3 parts by weight, more preferably 0.5 to 2 parts by weight, even more preferably 0.6 to 1.5 parts by weight. , most preferably 0.6 to 1.0 parts by weight.

The foaming composition may further include one or more selected from the group consisting of a plasticizer, a filler, a crosslinking agent, an antioxidant, and a lubricant within a non-overlapping range, for example.

The natural resin foam layer has a foaming ratio of 230% or more in a preferred example, and 240% or more in a more preferred example, and the embossing performance and recovery performance are improved within this range.

The foaming ratio of the present substrate is a value that can be calculated by comparing the thickness of the foamed layer before foaming and the foamed layer after foaming. Specifically, the thickness of the foamed layer before foaming is measured with a micro gauge (Mitutoyo), and the foamed layer is After foaming by placing it in a Matisse oven at about 200° C. for about 1 minute, the thickness of the foaming layer after foaming is measured with a micro gauge (Mitutoyo), and then it can be calculated using Equation 1 below.

[Equation 1]

Foaming ratio = {[(thickness of foaming layer after foaming - thickness of foaming layer before foaming)/thickness of foaming layer before foaming]+1}X100

The natural resin foam layer may preferably have a flexibility (Stiffness) measured according to the method specified in ISO 243 of 10 or less, as a specific example 5 to 10, more specifically 8 to 10, within this range There is an advantage that seam curling does not occur at all during construction.

The natural resin foam layer preferably has an average diameter of cells of 50 to 200 μm, and has the advantage that the desired effect of the present invention is well expressed within this range.

In the present description, the average diameter of the bubbles means an average value of various diameters that the bubbles may have, and is not particularly limited when measured by a measurement method commonly used in the art to which the present invention pertains.

The plasticizer may be selected within a range that does not overlap with other components, for example, from the group consisting of phthalate-based plasticizers, terephthalate-based plasticizers, benzoate-based plasticizers, citrate-based plasticizers, phosphate-based plasticizers and adipate-based plasticizers. It may be at least one selected type, and may preferably be a non-phthalate-based plasticizer, in which case there is an advantage in that environmental friendliness is improved.

The filler may be selected within a range that does not overlap with other ingredients, for example, wood flour, mica, amorphous silica, talc, zeolite, magnesium carbonate, calcium sulfate, calcium phosphate, magnesium phosphate, aluminum oxide, kaolin, ATH (Alumina) trihydrate) and may be at least one selected from the group consisting of talc, and in this case, it has an economic advantage by reducing the cost.

The crosslinking agent may be, for example, at least one selected from the group consisting of diisocyanate, an epoxy group copolymer, and a hydroxycarboxylic acid compound, but is not limited thereto.

The crosslinking agent is preferably 0.1 to 5 parts by weight based on 100 parts by weight of the base resin, and has an effect of improving tensile strength, heat resistance, etc. within this range.

The antioxidant is preferably 0.1 to 5 parts by weight based on 100 parts by weight of the base resin, and within this range, the base resin is oxidized to prevent deterioration of mechanical properties such as impact resistance.

The antioxidant may be, for example, at least one selected from the group consisting of phenol-based antioxidants, sulfur-based antioxidants and phosphorus-based antioxidants used as antioxidants for plastics, but is not limited thereto.

The lubricant may be, for example, stearic acid.

The lubricant is preferably 0.1 to 8 parts by weight based on 100 parts by weight of the base resin, and within this range, foaming quality and processability are excellent.

The foaming composition may not include, for example, a PVC resin, and in this case, there is an advantage of excellent environmental friendliness and carbon dioxide reduction effect.

As another example, the foaming composition may not include, for example, an acrylic resin, and in this case, there is an advantage of being excellent in environmental friendliness and carbon dioxide reduction effect.

More preferably, the foaming composition may not include both a PVC resin and an acrylic resin, and in this case, there is an advantage of being excellent in environmental friendliness and carbon dioxide reduction effect.

The natural resin foam layer may have a thickness of, for example, 0.2 to 4.0 mm, or 0.2 to 2.0 mm, and when it has a thickness within the above range, there is an advantage in that the surface of the foam layer is uniform and processability is easy.

The natural resin foam layer may include, for example, air bubbles, and the cells may have, for example, an average diameter of 3 to 30 µm, preferably 5 to 28 µm, and the strength and heat resistance of the foam layer within this range. This has excellent advantages.

In the present description, the method for measuring the average diameter of the bubbles is not particularly limited as long as it is a method commonly used in the art to which the present invention pertains.

print layer

The printing layer of the present invention may be located, for example, on the natural resin foam layer, which can impart aesthetics to the wallpaper by forming various printed patterns on the natural resin foam layer.

The printing layer may be printed on the natural resin foam layer as an example, but is not limited thereto. Such printing may be, for example, one or more types of printing selected from the group consisting of transfer printing, gravure printing, screen printing, offset printing, rotary printing, and flexographic printing.

The printing layer may be made of a printing composition including, for example, a water-soluble ink, and the printing composition may include, for example, a plasticizer, a melt strength enhancer, a lubricant, a hydrolysis resistance, calcium carbonate (CaCO ₃ ) and titanium dioxide (TiO ₂ ), etc. It may include one or more selected from the group consisting of.

The plasticizer may be preferably a non-phthalate-based plasticizer.

The melt strength reinforcing agent is not particularly limited if it is a melt strength reinforcing agent commonly used in the technical field to which the present invention pertains.

The lubricant may be preferably a higher fatty acid, and includes all of the fatty acids described above in the resin foaming layer.

The print layer may preferably include a water-soluble ink.

The printing layer is formed on the top of the foam layer to form a pattern on the surface of the foam layer in various ways such as transfer printing, gravure printing, screen printing, offset printing, rotary printing, or flexographic printing, thereby providing aesthetics to the foamed wallpaper. do

The printed layer may preferably have a thickness of about 0.01 mm to about 0.3 mm, and within this range, there is an advantage in that an appearance and design with excellent aesthetics can be implemented at an appropriate manufacturing cost.

wallpaper

The foam wallpaper may preferably include an adhesive layer under the base layer, or an adhesive layer and a second base layer sequentially.

The foam wallpaper may preferably include a partially foamed layer on the printed layer.

Hereinafter, the foamed wallpaper of the present invention will be described in detail with reference to FIGS. 1 to 3 below.

1 is a conventional wallpaper structure that contains a non-biodegradable PVC foam layer, which is against the environment and generates a lot of carbon dioxide. Although the effect of reducing carbon dioxide and being eco-friendly including the material resin layer was achieved to some extent, there was a problem in that the workability was poor due to the low flexibility and the printability was not good.

The foamed wallpaper of the present invention shown in FIG. 3 includes the natural resin foam layer according to the present invention, and has excellent advantages in terms of eco-friendliness and carbon dioxide reduction, while also having excellent water resistance, flexibility, workability and printability.

Referring to FIG. 3, in the present invention, the base layer is the most basic layer of the sheet, and serves to support the upper resin layer and the printed layer. As the base layer, 100% pulp or pulp containing 10 to 30% by weight of PET fibers is used. Here, 100% pulp, or pulp containing 10 to 30% by weight of PET fiber is not particularly limited as long as it is generally used as a substrate in the technical field to which the present invention belongs, and preferred forms include imitation paper, nonwoven fabric or cotton fabric. However, the present invention is not limited thereto.

The imitation paper is preferably composed of 100% pulp, and the nonwoven fabric is preferably composed of pulp containing 10 to 30% by weight of PET fibers.

The basis weight of the imitation paper, non-woven fabric or cotton fabric constituting the base layer is preferably 80 to 200 g/m ² . If the basis weight of the base layer is less than 80 g/m ² , there is a risk of damage such as tearing of the sheet during construction or use ^. There is a problem that the construction is difficult due to the phenomenon occurring.

In the present description, the method for measuring the basis weight is not particularly limited if it is a measurement method commonly used in the technical field to which the present invention pertains.

In the present invention, the natural resin foaming layer formed on the base layer gives an aesthetic effect to the sheet, and glycidyl in 100 parts by weight of the base resin containing the bio-resin and the olefin resin in a weight ratio of 15:85 to 30:70. 1 to 5 parts by weight of a methacrylate-based compatibilizer and 2 to 9 parts by weight of acrylic-modified polytetrafluoroethylene (PTFE) It has the advantage of being excellent in printability, etc.

Here, the detailed description of the natural resin foam layer is the same as that described above in the foam layer, and thus is omitted in order to avoid inconvenience.

The natural resin foam layer may be formed by a known calendaring method or a T-die extrusion method, but is not limited thereto.

The printing layer formed on the natural resin foam layer may give various patterns and/or colors to the sheet, thereby further improving the aesthetic effect. Here, as a method of forming the print layer, a known printing method such as gravure printing, transfer printing, digital printing, or rotary printing may be used as an example, but is not particularly limited.

The printed layer may be, for example, a photorealistic printing layer or a transfer printing layer, and may be more conveniently provided with an aesthetic effect by using a known photorealistic printing method such as inkjet printing or a transfer method, respectively.

Hereinafter, a method for manufacturing the wallpaper of the present invention will be described. In the description of the method for manufacturing the wallpaper of the present invention, all of the above-described wallpaper may be included.

The manufacturing method of the wallpaper of the present invention includes, for example, 100 parts by weight of a base resin comprising a bio-resin and an olefin resin in a weight ratio of 15:85 to 30:70 on the upper portion of the base layer; 1 to 5 parts by weight of a glycidyl methacrylate-based compatibilizer; 2 to 9 parts by weight of acrylic-modified polytetrafluoroethylene (PTFE) as a processing aid; And coating a foaming composition containing 1 to 10 parts by weight of a foaming agent and then foaming to form a natural resin foaming layer (S1); and forming a printing layer on the natural resin foam layer (S2); in this case, the plant-derived component is contained so that the eco-friendliness and carbon dioxide reduction effect are large, while the water resistance, flexibility and printability are equal to or more , and has the advantage of providing eco-friendly foamed wallpaper with greatly improved processability, foaming quality and constructability.

The blowing agent may be preferably a chemical blowing agent, more preferably azodicarbonamide, p,p'-oxybisbenzenesulfonylhydrazide, p- It may be at least one selected from the group consisting of toluene sulfonyl hydrazide (p-toluene sulfonyl hydrazide) and benzene sulfonyl hydrazide (benzene sulfonyl hydarazide), but is not limited thereto.

The foaming agent may be preferably 1 to 5 parts by weight, preferably 2 to 4 parts by weight, and more preferably 2.5 to 3.5 parts by weight based on 100 parts by weight of the base resin, and within this range, the effect of excellent foaming quality is obtained. have.

The foaming agent may have, for example, a particle diameter of 3 to 40 μm, and has the advantage of forming cells having a uniform diameter within this range.

The foaming may be performed under a temperature of 150 to 250°C, preferably 190 to 230°C, for example, and the foaming quality is excellent within this range.

The natural resin foaming layer forming step (S1) may include, for example, mixing the foaming composition with a plasticizer, and then applying the foaming composition to the base sheet using a knife coater, a roll cutter, or the like.

The natural resin foam layer forming step (S1) may include, for example, drying after the application step.

Hereinafter, preferred examples are presented to help the understanding of the present invention, but the following examples are merely illustrative of the present invention, and it will be apparent to those skilled in the art that various changes and modifications are possible within the scope and spirit of the present invention, It goes without saying that such variations and modifications fall within the scope of the appended claims.

[Example]

Materials used in the following examples are as follows.

A) POE was used as the olefin resin.

B) PLA resin was used as the bio-resin.

C-1) Calcium carbonate was used as an inorganic filler.

C-2) Titanium dioxide was used as an inorganic filler.

D-1) PTFE resin (A3000 manufactured by Mitsubishi Rayon) was used as a fluorine-based processing aid.

D-2) BYK-P 4101 was used as a polyalkylene glycol-based processing aid.

D-3) LG Chem PA828 was used as an acrylic processing aid.

E) Stearic acid was used as a fatty acid-based lubricant.

F) A polyolefin grafted with glycidyl methacrylate (SOG-03 from Fine-Blend) was used as a glycidyl (meth)acrylate-based compatibilizer.

G) Azodicarbonamide (ADCA), a chemical blowing agent, was used as a blowing agent.

Examples 1 to 6 and Comparative Examples 1 to 8

A foaming layer was prepared by foaming the foaming composition according to the components and contents shown in Table 1 at 230°C for 50 seconds.

[Test Example]

The properties of the foam layers prepared in Examples 1 to 6 and Comparative Examples 1 to 8 were measured by the following method, and the results are shown in Table 1 below.

* Foaming ratio: The thickness of the pregelling sheet in the pregelling state before foaming and the thickness of the foamed sheet foamed at 230° C. were measured and then calculated using Equation 2 below. Here, foam seat|seet is distinguished from the base material sheet which forms a base material layer by forming a resin foam layer.

[Equation 2]

Foaming ratio = (foaming sheet thickness / initial pregelling sheet thickness) X 100

* Stiffness: It was measured according to the method specified in ISO 243.

* Processability: When a resin sheet was manufactured with two rolls, the resin did not stick to the roll and a uniform bank was formed, which was evaluated as good.

* Foaming surface properties: When the foamed surface is flat when visually observed when the resin foam layer (sheet) is manufactured under the foaming conditions of 230° C. and 50 seconds, it was evaluated as good.

* Workability: Apply general paper glue to the base material, mature it for about 1 hour, and apply it on the wall. At this time, the constructability evaluation was evaluated as good when curling did not occur at the seam.

parts by weight Example comparative example One 2 3 4 5 6 One 2 3 4 5 6 7 8 A 75 70 75 75 75 75 60 75 75 75 75 75 75 75 B 25 30 25 25 25 25 40 25 25 25 25 25 25 25 C-1 40 40 40 80 40 40 40 40 40 40 40 120 40 5 C-2 10 10 10 10 10 10 10 10 10 10 10 10 10 5 D-1 3 3 5 3 3 0 3 0 0 10 3 3 0.1 3 D-2 0 0 0 0 0 One 0 0 0 0 0 0 0 0 D-3 0 0 0 0 0 0 0 3 0 0 0 0 0 0 E One One One One One One One One One One One One One One F One One One One 3 One One One One One 0 One One One G 3 3 3 3 3 3 3 3 3 3 3 3 3 3 expansion ratio 240 240 240 240 240 240 240 N/A N/A N/A 201 N/A N/A 240 Stiffness 9 10 9 9 9 9 15 N/A N/A N/A N/A N/A N/A 11 machinability Good Good Good Good Good Good Good roll sticking roll sticking Difficulty in forming a bank roll sticking Difficulty in forming a bank roll sticking Part of roll sticking foam surface Good Good Good Good Good Good Good N/A N/A N/A N/A N/A N/A Good constructability Good Good Good Good Good Good seam curling N/A N/A N/A N/A N/A N/A Seam Daily Curling

* N/A means that it is not available because it is difficult to process normally.

As shown in Table 1, the resin foam layer (Examples 1 to 6) according to the present invention has equal or greater flexibility compared to the resin foam layer (Comparative Examples 1 to 8) outside the scope of the present invention, while processability, foaming It was confirmed that both quality and workability were excellent.

Examples 7 and 8

A foamed wallpaper sample was prepared by foaming on the base layer shown in Table 2 under the conditions of 230° C. and 50 seconds to form a resin foam layer. Table 2 shows.

* Shrinkage rate after construction: Apply general paper glue to the wallpaper specimen substrate with a width of 1060 mm, aged for about 1 hour, and then installed on the wall. At this time, the wallpaper paste was composed of starch, and after drying the wallpaper specimen, the wallpaper paste was applied at a solid content of 10 to 30 g/m2 at a room temperature of 20°C or higher. The shrinkage rate was calculated using Equation 3 below after construction.

[Equation 3]

Wallpaper shrinkage rate = [(Wallpaper width before installation - wallpaper width after installation)/Wallpaper length before installation] X 100

* Workability: After applying general paper glue to the substrate and aging it for about 1 hour, it was applied to the wall. At this time, the constructability evaluation was evaluated as good when curling did not occur at the seam.

Raw material composition Example 7 Example 8 resin foam layer Example 1 Example 1 base layer Non-woven fabric (cellulose 80% by weight, PET fiber 20% by weight, immersion shrinkage less than 1%) Imitation paper (100 wt% cellulose, less than 2% immersion shrinkage) Shrinkage after construction 1060mm → 1067mm 1060mm → 1080mm constructability Good seam curling

As shown in Table 2 above, Example 7 using a nonwoven fabric having an immersion shrinkage of about 1% as a base layer in a resin foam layer according to the present invention compared to Example 8 using a imitation paper having an immersion shrinkage of about 2% as a base layer It was confirmed that it was more advantageous in terms of post-shrinkage rate and workability.

Claims (16)

base layer; resin foam layer; and a printed layer;
The resin foam layer, as an olefin resin, 65 to 85 wt% of a POE (Polyolefin Elastomer) resin and 15 to 35 wt% of a PLA resin 100 parts by weight of a base resin, 30 to 120 parts by weight of an inorganic filler, a fluorine-based processing aid or poly It is formed including an alkylene glycol-based processing aid, and a compatibilizer,
The inorganic filler includes calcium carbonate and titanium dioxide in a weight ratio of 3:1 to 9:1,
The fluorine-based processing aid is polytetrafluoroethylene (PTFE) resin,
The polyalkylene glycol-based processing aid is a polyalkylene glycol-alkyl (meth) acrylate copolymer,
The compatibilizer is a glycidyl (meth)acrylate-based compatibilizer,
The base layer is measured under the conditions of a specimen size of 200 x 200 mm, water as an immersion solution, an immersion time of 1 hour, and an immersion temperature at room temperature (20 to 23° C.), and the following Equation 1
[Equation 1]
Immersion shrinkage = [(length of base layer before immersion - length of base layer after immersion)/length of base layer before immersion] X 100
Characterized in that the immersion shrinkage calculated as 1.5% or less
foam wallpaper. delete delete delete delete delete delete delete The method of claim 1,
The resin foam layer is characterized in that it does not contain a PVC resin
foam wallpaper. The method of claim 1,
The base layer may contain at least 75% by weight of pulp, cellulose, or a mixture thereof; and 25% by weight or less of PET fibers.
foam wallpaper. The method of claim 1,
The base layer is characterized in that it comprises a non-woven fabric
foam wallpaper. delete The method of claim 1,
The foamed wallpaper was measured under the conditions of a specimen size of 200 x 200 mm, water as an immersion liquid, an immersion time of 1 hour, and an immersion temperature at room temperature. characterized in that it is 80 to 120% of the shrinkage
foam wallpaper.
[Equation 1]
Immersion shrinkage = [(length of base layer before immersion - length of base layer after immersion)/length of base layer before immersion] X 100 The method of claim 1,
The foamed wallpaper is characterized in that the shrinkage rate of the wallpaper applied to the wall is 2% or less according to the following Equation 3 after applying a general wallpaper paste to a specimen substrate having a width of 1060 mm and aging it for 1 hour.
foam wallpaper.
[Equation 3]
Wallpaper shrinkage = [(Wallpaper width before installation - wallpaper width after installation)/Wallpaper width before installation] X 100 The method of claim 1,
The foamed wallpaper comprises at least one selected from the group consisting of an adhesive layer, a second base layer, and a partially foamed layer.
foam wallpaper. 100 parts by weight of a base resin comprising 65 to 85% by weight of a polyolefin elastomer (POE) resin and 15 to 35% by weight of a PLA resin as an olefin resin; 30 to 120 parts by weight of an inorganic filler; Fluorine-based processing aids or polyalkylene glycol-based processing aids; compatibilizer; and 0.5 to 10 parts by weight of a chemical foaming agent; and then foaming at a foaming ratio of 180% or more to prepare a resin foam layer (S1), and
Including the step (S2) of forming a printed layer on the upper portion of the resin foam layer,
The inorganic filler includes calcium carbonate and titanium dioxide in a weight ratio of 3:1 to 9:1, the fluorine-based processing aid is a polytetrafluoroethylene (PTFE) resin, and the polyalkylene glycol-based processing aid is a polyalkyl Ren glycol-alkyl (meth) acrylate copolymer, the compatibilizer is a glycidyl (meth) acrylate-based compatibilizer,
The base layer has a specimen size of 200 x 200 mm, water as an immersion solution, immersion time of 1 hour, and immersion temperature at room temperature (20 to 23 ° C) conditions, and the immersion shrinkage rate calculated by the following Equation 1 is 1.5% or less to do
Method for manufacturing foam wallpaper.
[Equation 1]
Immersion shrinkage = [(length of base layer before immersion - length of base layer after immersion)/length of base layer before immersion] X 100

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