KR102563027B1 - Surface-reinforced hpm waterproof sheet and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a surface-reinforced HPM (High Pressure Melamine) waterproof sheet and a manufacturing method thereof.
The surface-reinforced HPM waterproof sheet according to one embodiment of the technical idea of the present invention includes phenolic resin impregnated kraft paper, a waterproof board positioned on the phenolic resin impregnated kraft paper, a printing paper layer positioned on the waterproof board, and the printing It includes a transparent paper layer located on the paper layer, and the phenolic resin-impregnated kraft paper is impregnated with 45 to 55% by mass of phenolic resin based on the mass of the kraft paper, and then dried in an oven at a temperature of 150 to 160 ° C. for 3 to 5 minutes can be manufactured.
With the above configuration, the method for manufacturing a surface-reinforced HPM (High Pressure Melamine) waterproof sheet according to various embodiments of the technical idea of the present invention can prevent numerical deformation such as shrinkage and expansion due to heat or moisture, as well as It is possible to manufacture HPM (High Pressure Melamine) waterproof sheet with improved resistance to external impact by enhancing physical properties such as abrasion resistance, impact resistance, and scratch resistance.

Description

Surface-reinforced HPM waterproof sheet and its manufacturing method {SURFACE-REINFORCED HPM WATERPROOF SHEET AND MANUFACTURING METHOD THEREOF}

The present invention relates to a surface-reinforced HPM (High Pressure Melamine) waterproof sheet and a method for manufacturing the same, and more specifically, it can prevent numerical deformation such as shrinkage and expansion caused by heat or moisture, as well as have abrasion resistance, impact resistance, resistance It relates to a surface-reinforced HPM (High Pressure Melamine) waterproof sheet with improved resistance to external impact due to enhanced physical properties such as scratch resistance and a manufacturing method thereof.

Floorboard (flooring) refers to a material used for living room floors in apartments and detached houses, or indoor floors in offices and schools. The demand for phosphorus lumber is on the rise.

In general, it is common to decorate the interior by plastering the interior with a general type of flooring to decorate the concrete surface of the interior floor of various buildings. In order to make the entire space have a natural wood texture, a construction that expresses the wood texture of wood as it is is becoming common by attaching a separate floorboard to the indoor floor.

However, this type of construction method according to the prior art is constructed by attaching floorboards manufactured by a general manufacturing method to the indoor floor of various buildings, and there is no significant difference between the products at the beginning of the construction state, but the temperature change in the room Water resistance and heat resistance are weak, construction methods are difficult, and there are many aspects that are very insufficient to express the natural wood texture like wood.

In addition, conventional indoor flooring materials of various buildings undergo many changes such as contraction and expansion according to changes in indoor temperature and humidity according to seasonal changes such as summer and winter, and accordingly, the relationship between indoor flooring materials and the floor surface There was a problem that bending, twisting, and lifting of floor materials frequently occurred due to poor adhesive strength.

Domestic Patent No. 10-1441345 (registered on September 11, 2014) Domestic Patent Publication No. 10-2017-0043218 (published on April 21, 2017) Domestic Patent Publication No. 10-2011-0128110 (published on November 28, 2011)

The problem to be solved by the present invention is to prevent numerical deformation such as shrinkage and expansion due to heat or moisture, as well as to enhance physical properties such as abrasion resistance, impact resistance, and scratch resistance, so that the resistance to external impact is improved. It is to provide HPM (High Pressure Melamine) waterproof sheet and its manufacturing method.

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

In one embodiment of the technical idea of the present invention, a surface-reinforced HPM waterproof sheet is disclosed.

The surface-reinforced HPM waterproof sheet includes phenolic resin-impregnated kraft paper, a waterproof board positioned on the phenolic resin-impregnated kraft paper, a printed paper layer positioned on the waterproof board, and a transparent paper layer positioned on the printed paper layer, The phenolic resin-impregnated kraft paper may be prepared by impregnating the kraft paper with 45 to 55% by mass of a phenolic resin based on the mass of the kraft paper, and then drying the kraft paper in an oven at a temperature of 150 to 160 ° C. for 3 to 5 minutes.

In addition, in another embodiment of the technical idea of the present invention, a method for manufacturing a surface-reinforced HPM waterproof sheet is disclosed.

In the manufacturing method of the surface-reinforced HPM waterproof sheet, phenolic resin-impregnated kraft paper, waterproof board, printed paper layer and transparent paper layer are prepared, and the phenolic resin-impregnated kraft paper, waterproof board, printed paper layer and transparent paper layer are laminated, and then heat Pressing and molding, and cooling and drying the heat-compressed phenolic resin-impregnated kraft paper, waterproof board, printed paper layer, and transparent paper layer to prepare an HPM waterproof sheet, but the phenolic resin-impregnated kraft paper is phenolic resin relative to the mass of the kraft paper It is prepared by impregnating with 45 to 55% by mass and then drying in an oven at a temperature of 150 to 160 ° C for 3 to 5 minutes, the waterproof board is formed to a thickness of 0.5 to 1.5 mm, and the printing paper layer is melamine resin or polyvinyl fluoride. Polyvinylidene Fluoride (Polyvinylidene Fluoride) resin and dimethyl acetamide (dimethyl acetamide) are mixed in a weight ratio of 8: 1: 1 to form resin-impregnated printing paper, and the weight of the paper in the printing paper may be 50 to 150 gsm.

Details of other embodiments are included in the detailed description.

The method for manufacturing a surface-reinforced HPM (High Pressure Melamine) waterproof sheet according to various embodiments of the technical idea of the present invention can prevent numerical deformation such as shrinkage and expansion caused by heat or moisture, and also has abrasion resistance, impact resistance, It is possible to manufacture HPM (High Pressure Melamine) waterproof sheet with improved resistance to external impact by enhancing physical properties such as scratch resistance.

It will be fully understood that various embodiments of the technical idea of the present invention can provide various effects not specifically mentioned.

1 is a cross-sectional view schematically showing a cross-section of a surface-reinforced HPM waterproof sheet according to one embodiment of the technical idea of the present invention.
Figure 2 is a photograph showing an example of the upper side of the surface-reinforced HPM waterproof sheet manufactured according to one embodiment of the technical idea of the present invention.
3 is a photograph showing an example of the lower side of the surface-reinforced HPM waterproof sheet manufactured according to an embodiment of the technical idea of the present invention.

The advantages and features of the present invention, and how to achieve them, will become clear with reference to the detailed description of the embodiments below. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content will be thorough and complete and the spirit of the present invention will be sufficiently conveyed to those skilled in the art.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with the meanings in the context of the related art, and unless explicitly defined in this application, they should not be interpreted in ideal or excessively formal meanings. don't

Hereinafter, a preferred embodiment of a surface-reinforced HPM waterproof sheet according to an embodiment of the technical idea of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view schematically showing a cross section of a surface-reinforced HPM waterproof sheet according to an embodiment of the technical idea of the present invention, and FIG. 2 is a surface-reinforced HPM manufactured according to an embodiment of the technical idea of the present invention. It is a photograph showing an example of the upper side of the waterproof sheet, and FIG. 3 is a photograph showing an example of the lower side of the surface-reinforced HPM waterproof sheet manufactured according to an embodiment of the technical idea of the present invention.

1 to 3, the surface-reinforced HPM (High Pressure Melamine) waterproof sheet 10 according to one embodiment of the technical idea of the present invention includes a phenolic resin impregnated kraft paper 100, the phenolic resin impregnated kraft paper It includes a waterproof board 200 positioned on 100, a printed paper layer 300 positioned on the waterproof board 200, and a transparent paper layer 400 positioned on the printed paper layer 300.

The phenolic resin-impregnated kraft paper 100 according to one embodiment of the technical idea of the present invention, the waterproof board 200 positioned on the phenolic resin-impregnated kraft paper 100, and positioned on the waterproof board 200 The printing paper layer 300 and the HPM (High Pressure Melamine) waterproof sheet 10 including the printing paper layer 300 may be formed to a thickness of 1.0 to 2.0 mm.

In addition, the HPM (High Pressure Melamine) waterproof sheet 10 including the phenol resin impregnated kraft paper 100, the waterproof board 200, the printed paper layer 300 and the transparent paper layer 400 according to the present invention is the phenol It can be used by attaching PVC to the lower part of the resin-impregnated kraft paper 100 or by attaching it to plywood.

In addition, according to the present invention, HPM (High Pressure Melamine) waterproof sheet (10 ) can be attached to the floor surface or attached to the wall, and the technical idea of the present invention can be applied to various fields other than the floor surface or wall, for convenience of description and clarity of the technical idea of the present invention. A detailed description of various fields of use of the HPM (High Pressure Melamine) waterproof sheet 10 according to the present invention will be omitted.

The phenolic resin-impregnated kraft paper 100 is manufactured by impregnating kraft paper with a phenolic resin. to 55% by mass and then dried in an oven at a temperature of 150 to 160° C. for 3 to 5 minutes.

Since the kraft paper is tougher than general paper, the stiffness of the HPM (High Pressure Melamine) waterproof sheet 10 manufactured including the kraft paper may be further improved.

In addition, the phenolic resin is a material with excellent balance in terms of mechanical strength, heat resistance, dimensional accuracy, and cost, and for this reason, the phenolic resin is widely used as a molding material in various fields.

Among them, phenolic resin is an organic material that has excellent heat resistance and combustion resistance, so it is widely used to manufacture electric and electronic parts having complex shapes of fine sizes by extrusion and injection thermoforming processes.

These phenolic resin molding materials are said to be the only plastics that are safe against flames because they generate little harmful gas during combustion, do not soften at high temperatures and do not lose strength, and have a remarkably high residual carbonization rate even when exposed to high temperatures for a long period of time. Because it is visible, the strength deterioration is small compared to other plastics.

In addition, the phenolic resin molding material is superior in lightness, rust prevention, and corrosion resistance compared to metal, and its application is gradually expanding, such as interior and exterior materials for public construction, tunnels, mine materials, and vehicle materials, which are areas where polyester glass-reinforced plastics cannot respond. It is becoming.

The phenolic resin may impart adhesiveness. For example, the phenolic resin is prepared by ① reacting phenol and formaldehyde to prepare a reactant, ② vacuum-dehydrating the reactant, and ③ the vacuum-dehydrated reactant. It may be prepared by including the step of curing by adding a phenol-oil compound to.

The phenolic resins can be broadly divided into two general categories, novolaks and resols, which are generally characterized by having insufficient formaldehyde, wherein the ratio of formaldehyde to phenolic groups is less than 1. am.

The resole resin is generally characterized by being rich in formaldehyde, and the ratio of formaldehyde resin to phenol groups is greater than 1.

Both the novolaks and resols may incorporate a variety of phenolic compounds, alone or in combination, including but not limited to phenols, resorcinols, bisphenols, floglucinols, cresols, alkyl phenols, phenyl ethers, tannins and lignins. . Similarly, other aldehydes, including but not limited to acetaldehyde, propionaldehyde, cyclohexanedicarboxaldehyde, benzaldehyde, furfural, and other aryl or heterocyclic aldehydes, may fully or partially substitute formaldehyde.

The novolac resin can generally be cured (crosslinked, cured) through the use of formaldehyde, a formaldehyde-donating curing agent compound, or a formaldehyde equivalent compound. Hexa-methylenetetramine (hexa) and paraformaldehyde can often be used to cure novolak resins.

In addition to the source of formaldehyde, heat and the presence of a catalyst can often be used to increase the rate and extent of curing, the catalyst comprising calcium hydroxide, sodium hydroxide, potassium hydroxide, calcium oxide, magnesium oxide, or combinations thereof. inorganic bases; Lewis acids including zinc chloride, zinc acetate, or combinations thereof; or amines including triethylamine.

In step ① of preparing a reactant by reacting phenol with formaldehyde, the molar ratio of the formaldehyde to the phenol may be 0.8 to 1.2, and more specifically preferably 0.9 to 1.1. At this time, when the molar ratio of the formaldehyde to the phenol is less than 0.8, strength and adhesion may be weak, and when it exceeds 1.2, there is a problem of poor compatibility.

In this case, the formaldehyde may include paraformaldehyde. When phenol and paraformaldehyde are reacted, the molar ratio of the paraformaldehyde to the phenol is preferably 1.5 to 2.5.

The ① step of preparing a reactant by reacting phenol with formaldehyde may be performed for 1 to 3 hours at a temperature range of 110 to 130 ° C., and the step of ① preparing a reactant by reacting phenol and formaldehyde is a catalyst The reaction may proceed in the presence, for example, as the catalyst, any one or more catalysts selected from the group consisting of NaOH, Ba(OH) ₂ , Ca(OH) ₂ , Mg(OH) ₂ and KOH may be used.

In addition, the ② step of vacuum dehydrating the reactants is preferably performed at a temperature of 130 to 170 ° C. for 150 to 250 seconds (sec). When the vacuum dehydration of the reactants is performed within the above range, condensation water and By adjusting the molecular weight of the material containing the foreign matter together with the dehydration process, a phenolic resin with excellent physical properties can be prepared.

In addition, in the ③ step of curing by adding a phenol-oil compound to the vacuum-dehydrated reactant, the weight ratio of the phenol-oil compound to the reactant may be 0.2 to 0.8, and the weight ratio of the phenol-oil compound to the reactant is If it is less than 0.2, a problem of stability may occur due to the formation of macromolecules, and if it exceeds 0.8, a problem of deterioration of physical properties of the phenolic resin may occur.

At this time, the weight ratio of the oil in the phenol-oil compound is preferably 0.7 to 0.8, and when the content of the oil in the phenol-oil compound is within the above range, an active chemical reaction can occur during curing.

For example, the oil in the phenol-oil compound may include a fatty acid having a conjugated double bond. When the oil is an oil having a conjugated double bond, the ③ vacuum dehydrated reactant The step of curing by adding a phenol-oil compound is preferably performed at a temperature of 160 to 180° C. for 100 to 150 seconds (sec).

The waterproof board 200 is located on the phenolic resin-impregnated kraft paper 100, and improves adhesion between the phenolic resin-impregnated kraft paper 100 and the printing paper layer 300, and at the same time has excellent waterproof, flame retardant and flame retardant properties It is safe against fire and can strengthen the physical properties of the board itself. The waterproof board 200 may be formed to a thickness of 0.5 to 1.5 mm.

In the present invention, the waterproof board 200 is Methylene Diphenyl Diisocyanate (MDI), ethylene-vinyl acetate copolymer (EVA), plasticizer, rosin ester, polysiloxane, silicone compound, aluminum oxide and methylenebischloroaniline (MOCA).

In addition, the waterproof board 200 includes 80 to 120 parts by weight of Methylene Diphenyl Diisocyanate (MDI), 10 to 30 parts by weight of Ethylene-Vinyl Acetate Copolymer (EVA), and a plasticizer 3 to 7 parts by weight, 2 to 6 parts by weight of rosin ester, 1 to 3 parts by weight of polysiloxane, 0.1 to 1 part by weight of silicone compound, 0.1 to 1 part by weight of aluminum oxide and 10 to 20 parts by weight of methylenebischloroaniline (MOCA) It can be prepared by mixing in a ratio.

The methylene diphenyl diisocyanate (MDI) may have excellent chemical properties such as water resistance, chemical resistance, and salt water resistance, and excellent mechanical properties such as abrasion resistance and impact resistance, and excellent adhesive strength and waterproofness.

The ethylene-vinyl acetate copolymer (EVA) is a polymer obtained by copolymerizing ethylene and vinyl acetate monomers, and means a polymer resin commonly referred to as EVA. When the content of vinyl acetate monomer is low, the normal Like low-density polyethylene, it has excellent impact resistance and stress cracking resistance, and when the content of vinyl acetate is high, it has improved adhesiveness, so it can be used as a raw material for adhesives or hot melts.

The ethylene-vinyl acetate copolymer (EVA) is a copolymer resin of ethylene and vinyl acetate, and has excellent properties such as transparency, flexibility, and low-temperature brittleness, and is a very environmentally friendly resin. For example, , It is preferable to use the ethylene-vinyl acetate copolymer having a melt index of 400, a vinyl acetate content of 28%, and a glass transition temperature of -28.6°C.

The plasticizer may be mixed with Methylene Diphenyl Diisocyanate (MDI), Ethylene-Vinyl Acetate Copolymer (EVA), etc. to impart flexibility and adhesiveness. For example, As the plasticizer, one or more selected from the group consisting of sorbitol, ethylene glycol, glycerin, glycerin diacetate, and pentaerythritol may be used.

The rosin ester is an amorphous oligomer having a molecular weight of hundreds to thousands, and is a liquid or solid thermoplastic resin at room temperature. It can lower melt viscosity to improve workability, improve adhesion initial wettability, and improve adhesion with surface finishing materials or plate materials. .

For example, the rosin ester may be at least one selected from the group consisting of a terpene resin having a softening point of 75 to 100° C., a terpene phenol resin, an aromatic modified terpene resin, an alkylphenol resin, and a rosin modified phenol resin.

The polysiloxane can impart excellent water repellency and water repellency durability to the surface of the HPM waterproof sheet 10 including the waterproof board 200 by providing excellent water repellency.

The polysiloxane may be represented by the following [Formula 1].

[Formula 1]

In [Formula 1], R ⁴ is each independently a hydrogen atom, a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C6 to C30 aromatic organic group, an acrylate organic group, an epoxy organic group, or any of these combination, X is a hydrogen atom, a hydrogen sulfide group, a substituted or unsubstituted C1 to C10 alkyl group, an acrylate organic group, an epoxy organic group, or a combination thereof, and n is a weight average molecular weight (Mw) of polysiloxane of 1,000 g /mol to 100,000 g/mol is an integer greater than or equal to 1.

For example, the polysiloxane may include dimethylpolysiloxane and organopolysiloxane, and the dimethylpolysiloxane and organopolysiloxane may be used in combination such that the ratio is 4:6 to 6:4.

The silicone compound may be represented by the formula -R ₂ Si-O-SiR ₂ - (where R=CH ₃ ), and the silicone compound has unique flexibility, chemical resistance, UV resistance, flame retardancy, environmental friendliness, non-toxicity, It has solubility and stability in a wide temperature range. These properties are being applied as high-tech materials for sealants, gaskets, rubber molding, and heat dissipation.

In the present invention, the silicon compound is activated in case of fire, and the activated silicon can cause a chain reaction to form a stabilized silicon network, which is a barrier between heat sources. It plays a role to block the heat supplied from the secondary heat source and prevent the inflow of oxygen.

Since the aluminum oxide causes an endothermic reaction when a fire occurs, it serves to reduce the temperature rise and suppress the movement of combustion, thereby improving heat resistance.

In addition, the aluminum oxide may be represented by the chemical formula Al ₂ (OH) ₃ , and the aluminum oxide generates non-flammable moisture and metal oxide as a product of a combustion reaction, thereby blocking contact with oxygen, which is the cause of combustion, to achieve HPM waterproofing It is possible to further improve the fire resistance of the sheet 10, and it has excellent stability due to low toxic gas and low fumes during combustion.

The methylenebischloroaniline (MOCA) controls the adhesiveness and curing speed of Methylene Diphenyl Diisocyanate (MDI) and Ethylene-Vinyl Acetate Copolymer (EVA) used as the main material. can act as a curing agent.

The printing paper layer 300 is located on the waterproof board 200 and is a resin in which melamine resin, polyvinylidene fluoride (PVDF) resin, and dimethyl acetamide are mixed in a weight ratio of 8:1:1. It may be formed of impregnated printing paper. The printing paper is a sheet on which various patterns or patterns are formed on PVC or paper fabric, and may mean a sheet on which various patterns or patterns such as natural patterns and mosaic patterns are formed. Preferably, the weight of paper in the printing paper may be 50 to 150 gsm.

In addition, the melamine resin can coat the surface of the printing paper and provide adhesive strength to the printing paper at the same time. Since the melamine resin forms a colorless and transparent film when cured, adhesion of decorative veneers in manufacturing floorboards and furniture members, low-pressure melamine (LPM: low-pressure melamine) or low-pressure laminate (LPL: low pressure laminate), high-pressure melamine (HPM: high pressure melamine) or high-pressure laminate (HPL: high pressure laminate), such as overlay paper, patterned paper, or backing paper It is widely used in manufacturing. The film or coating formed by curing the melamine resin has water resistance, heat resistance, and chemical resistance, and is colorless and transparent in itself, rich in gloss and hard, so it is widely used in floorboards, roof boards, interior wall materials, and furniture materials.

In the present invention, the melamine resin-impregnated printing paper may be prepared by impregnating the printing paper using a conventional melamine resin known in the art. For clarity, a detailed description thereof will be omitted.

In addition, the polyvinylidene fluoride (PVDF) resin has excellent mechanical strength and chemical resistance, and is used as a piping material of a chemical plant, a storage tank, or a lining material for the inner surface of a reaction vessel. In addition, since the polyvinylidene fluoride resin has excellent weather resistance, it is also used as a surface protection film for base materials such as plastic plates and metal plates for interior and exterior of various buildings and automobiles, and as an insulating material for parts of electrical and electronic devices.

In this case, the polyvinylidene fluoride resin may be a known polyvinylidene fluoride resin having a molecular weight of 300,000 to 500,000 g/mol.

The dimethyl acetamide may be a solvent used to dissolve the polyvinylidene fluoride resin.

The transparent paper layer 400 may be formed on the printing paper layer 300 to improve durability and to protect the printing paper layer 300. The transparent paper layer 400 is made of melamine resin, PLA resin, A mixed resin impregnated non-stretched polypropylene (CPP: Casting PolyPropylene) film in which a phthalate-based plasticizer, an acrylic copolymer, and a lubricant are mixed in a weight ratio of 5:2:1:1:1 may be used.

The PLA resin is a thermoplastic polyester of lactide or lactic acid, and may be prepared by, for example, polymerizing lactic acid produced by fermenting starch extracted from corn, potato, etc. The PLA resin emits significantly less environmentally harmful substances such as CO ₂ during use or disposal than petroleum-based materials such as polyvinyl chloride (PVC), and is environmentally friendly because it can be easily decomposed in the natural environment even when discarded. have

The non-phthalate-based plasticizer is an environmentally friendly plasticizer, and softens the PLA resin to increase thermoplasticity, thereby facilitating molding at high temperatures. For example, Acetyl tributyl citrate (ATBC) may be used as the non-phthalate plasticizer.

The acrylic copolymer can be used as a melt strength enhancer. The PLA resin itself has weak melt strength or heat resistance, and the acrylic copolymer compensates for these disadvantages of the PLA resin to improve the melt strength. In addition, calendering and press processing can also be made possible.

The lubricant may be added to prevent the resin from adhering to the press during processing of the melamine resin or the PLA resin, such as a press. For example, the lubricant includes a saturated higher fatty acid having 18 carbon atoms. Phosphorus stearic acid can be used.

The non-stretched polypropylene (CPP: Casting PolyPropylene) film may be a known non-stretched polypropylene (CPP: Casting PolyPropylene) film having a thickness of 0.02 to 0.06 mm. For example, the known non-stretched polypropylene film is usually composed of 38-42wt% of Linear Low Density Polyethylene (LLDPE) resin, 16-24wt% of homogenius polypropylene resin, and 38-42wt% of calcium carbonate (CaCO ₃ ).

Since the configuration of the non-stretched polypropylene (CPP: Casting PolyPropylene) film is a known technology, a detailed description of the non-stretched polypropylene (CPP: Casting PolyPropylene) film is given for convenience of description and clarity of the technical idea of the present invention. to omit

Hereinafter, with reference to the accompanying drawings, a method for manufacturing a surface-reinforced HPM waterproof sheet according to an embodiment of the technical idea of the present invention will be described in more detail with a preferred embodiment.

In order to manufacture the surface-reinforced HPM waterproof sheet 10 according to an embodiment of the technical idea of the present invention, first, phenolic resin impregnated kraft paper 100, waterproof board 200, printed paper layer 300 and transparent paper layer (400) can be prepared.

The phenolic resin-impregnated kraft paper 100 is manufactured by impregnating kraft paper with a phenolic resin. to 55% by mass and then dried in an oven at a temperature of 150 to 160° C. for 3 to 5 minutes.

The waterproof board 200 contains 80 to 120 parts by weight of Methylene Diphenyl Diisocyanate (MDI), 10 to 30 parts by weight of an Ethylene-Vinyl Acetate Copolymer (EVA), and 3 to 7 plasticizers. 2 to 6 parts by weight of rosin ester, 1 to 3 parts by weight of polysiloxane, 0.1 to 1 part by weight of silicone compound, 0.1 to 1 part by weight of aluminum oxide, and 10 to 20 parts by weight of methylenebischloroaniline (MOCA) mixed in a weight ratio can be manufactured.

The printing paper layer 300 may be formed of resin-impregnated printing paper in which melamine resin, polyvinylidene fluoride (PVDF) resin, and dimethyl acetamide are mixed in a weight ratio of 8:1:1.

The transparent paper layer 400 is a mixed resin impregnated non-stretched polypropylene (CPP) in which melamine resin, PLA resin, non-phthalate plasticizer, acrylic copolymer and lubricant are mixed in a weight ratio of 5: 2: 1: 1: 1 : Casting Polypropylene) film can be used.

Next, the phenolic resin-impregnated kraft paper 100, the waterproof board 200, the printed paper layer 300, and the transparent paper layer 400 may be laminated and thermally compressed to form.

In the present invention, after laminating the phenolic resin-impregnated kraft paper 100, the waterproof board 200, the printing paper layer 300, and the transparent paper layer 400, and then pressurizing at a constant pressure using a hot press, heat It can be compression molded, for example, after stacking and positioning the phenolic resin impregnated kraft paper 100, waterproof board 200, printing paper layer 300 and transparent paper layer 400 in order, at a temperature of 120 to 150 ° C. The phenolic resin-impregnated kraft paper 100, the waterproof board 200, the printing paper layer 300 and the transparent paper layer 400 are thermally compressed by pressing at a pressure of 10 to 20 kgf / m ² at a press hot plate temperature for 20 to 60 minutes can be bonded.

On the other hand, in one embodiment of the technical idea of the present invention, the phenol resin-impregnated kraft paper 100, waterproof board 200, printed paper layer 300, and transparent paper layer 400 are laminated and then thermally compressed and molded to form a waterproof sheet Manufacturing is described as an example, but in another embodiment of the technical idea of the present invention, the phenolic resin impregnated kraft paper 100, the waterproof board 200, the printed paper layer 300 and the transparent paper layer 400 are laminated. Then, it may be manufactured into a low pressure melamine (LPM) waterproof sheet by pressing at a pressure of 15 to 60 psi at a press hot plate temperature of 180 to 200 ° C.

Subsequently, the HPM waterproof sheet 10 may be manufactured by cooling and drying the thermally compressed phenolic resin impregnated kraft paper 100, the waterproof board 200, the printed paper layer 300, and the transparent paper layer 400.

For example, in the present invention, the HPM waterproof sheet 10 includes the thermally compressed phenolic resin impregnated kraft paper 100, the waterproof board 200, the printed paper layer 300 and the transparent paper layer 400 of 50 to 150 mm. After loading by thickness, it may be prepared by cooling and drying in a drying room at 15 to 25 ° C.

Hereinafter, an example of a surface-reinforced HPM waterproof sheet according to an embodiment of the technical idea of the present invention will be described in more detail with reference to the accompanying drawings.

<Example 1>

First, kraft paper impregnated with phenolic resin, waterproof board, printing paper layer and transparent paper layer were prepared.

At this time, the phenolic resin-impregnated kraft paper was prepared by impregnating kraft paper with a phenolic resin. Specifically, the phenolic resin-impregnated kraft paper was impregnated with 50% by mass of phenolic resin based on the mass of the kraft paper, and then heated at 155 ° C. It was prepared by drying in an oven for 4 minutes.

In addition, the waterproof board includes 100 parts by weight of Methylene Diphenyl Diisocyanate (MDI), 20 parts by weight of an Ethylene-Vinyl Acetate Copolymer (EVA), 5 parts by weight of a plasticizer, and 4 parts by weight of a rosin ester. Part, 2 parts by weight of polysiloxane, 0.5 part by weight of silicone compound, 0.5 part by weight of aluminum oxide and 15 parts by weight of methylenebischloroaniline (MOCA) were mixed in a weight ratio to prepare a thickness of 1.0 mm.

In addition, the printing paper layer is formed of resin-impregnated printing paper in which melamine resin, polyvinylidene fluoride (PVDF) resin, and dimethyl acetamide are mixed in a weight ratio of 8:1:1, and the printing paper has a weight This 100 gsm paper was used for printing on which a certain pattern was formed.

In addition, the transparent paper layer is a mixed resin impregnated non-stretched polypropylene (CPP: Casting PolyPropylene) film was used, and the non-stretched polypropylene film contained 40wt% of Linear Low Density Polyethylene (LLDPE) resin, 20wt% of homogenius polypropylene resin, and 40wt% of calcium carbonate (CaCO ₃ ) by weight. It was prepared by mixing in a ratio.

Next, the phenolic resin impregnated kraft paper, waterproof board, printed paper layer, and transparent paper layer are sequentially laminated and placed, and then pressurized for 40 minutes at a pressure of 15 kgf / m ² at a press hot plate temperature of 135 ° C. The phenolic resin impregnated kraft paper The paper, waterproof board, printing paper layer and transparent paper layer were bonded by thermal compression.

Subsequently, the thermally compressed phenolic resin impregnated kraft paper, waterproof board, printed paper layer, and transparent paper layer were cooled and dried in a drying room at 20° C. to prepare an HPM waterproof sheet having a thickness of 1.4 mm.

<Example 2>

An HPM waterproof sheet was manufactured in the same manner as in Example 1. In Example 2, the waterproof board was made of 110 parts by weight of Methylene Diphenyl Diisocyanate (MDI), ethylene-vinyl acetate copolymer (Ethylene-Vinyl Acetate Copolymer ; EVA) 15 parts by weight, plasticizer 6 parts by weight, rosin ester 3 parts by weight, polysiloxane 2.5 parts by weight, silicone compound 0.2 parts by weight, aluminum oxide 0.8 parts by weight and methylenebischloroaniline (MOCA) 11 parts by weight mixed in a weight ratio manufactured.

<Example 3>

An HPM waterproof sheet was manufactured in the same manner as in Example 1. In Example 3, the waterproof board was made of 90 parts by weight of Methylene Diphenyl Diisocyanate (MDI), ethylene-vinyl acetate copolymer (Ethylene-Vinyl Acetate Copolymer ; EVA) 25 parts by weight, plasticizer 4 parts by weight, rosin ester 5 parts by weight, polysiloxane 1.5 parts by weight, silicone compound 0.9 parts by weight, aluminum oxide 0.3 parts by weight and methylenebischloroaniline (MOCA) 18 parts by weight mixed in a weight ratio manufactured.

<Comparative Example>

First, kraft paper impregnated with phenolic resin, waterproof board, printing paper layer and transparent paper layer were prepared.

At this time, the phenolic resin-impregnated kraft paper was prepared by impregnating kraft paper with a phenolic resin. Specifically, the phenolic resin-impregnated kraft paper was impregnated with 50% by mass of phenolic resin based on the mass of the kraft paper, and then heated at 155 ° C. It was prepared by drying in an oven for 4 minutes.

In addition, the waterproof board was manufactured using only Methylene Diphenyl Diisocyanate (MDI).

In addition, the printing paper layer is formed of resin-impregnated printing paper in which melamine resin, polyvinylidene fluoride (PVDF) resin, and dimethyl acetamide are mixed in a weight ratio of 8:1:1, and the printing paper has a weight This 100 gsm paper was used for printing on which a certain pattern was formed.

In addition, the transparent paper layer used a melamine resin-impregnated non-stretched polypropylene (CPP: Casting PolyPropylene) film, and the non-stretched polypropylene film contained 40 wt% of LLDPE: Linear Low Density Polyethylene (LLDPE) resin and homogeneous polypropylene ( It was prepared by mixing 20wt% of Homogenius Polypropylene) resin and 40wt% of calcium carbonate (CaCO ₃ ) in a weight ratio.

Next, the phenolic resin impregnated kraft paper, waterproof board, printed paper layer, and transparent paper layer are sequentially laminated and placed, and then pressurized for 40 minutes at a pressure of 15 kgf / m ² at a press hot plate temperature of 135 ° C. The phenolic resin impregnated kraft paper The paper, waterproof board, printing paper layer and transparent paper layer were bonded by thermal compression.

Subsequently, the thermally compressed phenolic resin impregnated kraft paper, plywood, printed paper layer, and transparent paper layer were cooled and dried in a drying room at 20° C. to prepare an HPM waterproof sheet having a thickness of 1.4 mm.

1. Observation of bending phenomenon

After attaching the HPM waterproof sheet prepared according to the examples and comparative examples as described above to plywood (6.1 mm thick), the occurrence of bending was observed, and the results are shown in [Table 1] below.

division Whether there is a bending phenomenon Example 1 X Example 2 X Example 3 X comparative example O

As shown in [Table 1], it was confirmed that the bending phenomenon did not occur in the HPM waterproof sheet prepared according to Examples 1 to 3.

2. Wear resistance test

An abrasion resistance test of the HPM waterproof sheet prepared according to Example 1 was performed, and the results are shown in [Table 2].

Test method: KS F 3126 standard, if (initial wear + final wear)/2 = 350 times or more, it is passed

Sample specification: Test by making a test disk with a diameter of 100 mm

Quality standard: Experiment by replacing the wear wheel S-42 with a new wear wheel every 200 revolutions

Test Items wear wheel Test result result note initial wear point final wear point wear resistance S-42 485 times 625 times 555 times pass

Referring to [Table 2], in the abrasion resistance test of the HPM waterproof sheet prepared according to Example 1, the initial abrasion point was 485 times and the final abrasion point was 625 times, and it was confirmed that it showed excellent abrasion resistance characteristics .

3. Dimensional change rate experiment

The dimensional change rate test of the HPM waterproof sheet (1.4 mm) attached to the plywood (6.1 mm) manufactured according to Example 1 was performed, and the results are shown in [Table 3].

Test method: Refer to KS F 3216 decorative wood floor board test, measure length change rate (%) after 24 hours in water at 20℃

Sample size: Maru's ledger size

Test Items Before input (mm) After input (mm) Result (length change rate %) dimensional change rate 800 800.85 0.10625%

Referring to [Table 3], as a result of measuring the length change rate (%) after putting the sample in water at a temperature of 20 ° C for 24 hours, the length change rate was 0.10625%, and the HPM waterproof sheet prepared according to Example 1 was confirmed to be stable in moisture, etc.

4. Absorption thickness expansion rate experiment

The absorption thickness expansion rate test of the HPM waterproof sheet (1.4 mm) attached to the plywood (6.1 mm) manufactured according to Example 1 was performed, and the results are shown in [Table 4].

Test method: Refer to KS F 3216 decorative wood reinforced floor board test, measure thickness change rate (%) by removing moisture after putting it in water at 20 ° C for 24 hours in a constant temperature water bath

Sample size: Maru's ledger size

Quality standard: less than 6%

Test Items Before input (mm) After input (mm) Result (thickness change rate %) dimensional change rate 7.5 7.64 1.866%

Referring to [Table 4], the sample was put in water at a temperature of 20 ° C for 24 hours in a constant temperature water bath, and then the moisture was removed to measure the thickness change rate (%). It was confirmed that the quality standards were satisfied.

5. Smoke density, toxic gas and flame propagation test

Smoke density, toxic gas and flame propagation of the HPM waterproof sheet prepared in Example 1 were measured, and the results are shown in [Table 5] below.

Smoke density and toxic gas measurement methods were performed according to the ISO 5659-2 combustion chamber test method.

item smoke density toxic gas flame propagation 50kw non-flame HCl CO Critic Flux standard < 500ppm < 600ppm < 1450ppm > 7 W/m ² Example 1 312 215 355 9.2

Referring to [Table 5], it was confirmed that the HPM waterproof sheet manufactured according to Example 1 had a stable and excellent effect by reducing the smoke density and toxic gas generated by the combustion of the resin during a fire.

In the above, a preferred embodiment of the present invention has been described with reference to the accompanying drawings, but those skilled in the art to which the present invention pertains may change the technical spirit or essential characteristics of the present invention in other specific forms. It will be appreciated that it can be implemented. Therefore, one embodiment described above should be understood as illustrative in all respects and not limiting.

10; HPM waterproof sheet
100; Phenolic Resin Impregnated Kraft Paper
200; waterproof board
300; printing layer
400; transparent layer

Claims (4)

A phenolic resin-impregnated kraft paper, a waterproof board positioned on the phenolic resin-impregnated kraft paper, a printed paper layer positioned on the waterproof board, and a transparent paper layer positioned on the printed paper layer,
The phenolic resin-impregnated kraft paper is prepared by impregnating kraft paper with 45 to 55% by mass of phenolic resin based on the mass of kraft paper, and then drying in an oven at a temperature of 150 to 160 ° C. for 3 to 5 minutes,
The waterproof board is formed to a thickness of 0.5 to 1.5 mm, and the waterproof board is made of 80 to 120 parts by weight of Methylene Diphenyl Diisocyanate (MDI), ethylene-vinyl acetate copolymer (Ethylene-Vinyl Acetate Copolymer; EVA) 10 to 30 parts by weight, 3 to 7 parts by weight of plasticizer, 2 to 6 parts by weight of rosin ester, 1 to 3 parts by weight of polysiloxane, 0.1 to 1 part by weight of silicone compound, 0.1 to 1 part by weight of aluminum oxide and methylenebischloroaniline (MOCA ) is prepared by mixing in a weight ratio of 10 to 20 parts by weight,
The printing paper layer is formed of resin-impregnated printing paper in which melamine resin, polyvinylidene fluoride resin, and dimethyl acetamide are mixed in a weight ratio of 8:1:1, and the weight of the paper in the printing paper is 50 to 150 gsm,
The transparent paper layer is a mixed resin impregnated non-stretched polypropylene film in which melamine resin, PLA resin, non-phthalate plasticizer, acrylic copolymer and lubricant are mixed in a weight ratio of 5: 2: 1: 1: 1 A surface-reinforced HPM waterproof sheet characterized in that this is used.
delete Prepare phenolic resin impregnated kraft paper, waterproof board, printing paper layer and transparent paper layer,
The phenolic resin-impregnated kraft paper, waterproof board, printing paper layer and transparent paper layer are laminated and molded by thermal compression,
The heat-compressed phenolic resin impregnated kraft paper, waterproof board, printed paper layer, and transparent paper layer are loaded in thickness units of 50 to 150 mm, and then cooled and dried in a drying room at 15 to 25 ° C. to prepare an HPM waterproof sheet,
The phenolic resin-impregnated kraft paper is prepared by impregnating kraft paper with 45 to 55% by mass of phenolic resin based on the mass of kraft paper, and then drying in an oven at a temperature of 150 to 160 ° C. for 3 to 5 minutes,
The waterproof board is formed to a thickness of 0.5 to 1.5 mm, and the waterproof board is made of 80 to 120 parts by weight of Methylene Diphenyl Diisocyanate (MDI), ethylene-vinyl acetate copolymer (Ethylene-Vinyl Acetate Copolymer; EVA) 10 to 30 parts by weight, 3 to 7 parts by weight of plasticizer, 2 to 6 parts by weight of rosin ester, 1 to 3 parts by weight of polysiloxane, 0.1 to 1 part by weight of silicone compound, 0.1 to 1 part by weight of aluminum oxide and methylenebischloroaniline (MOCA ) is prepared by mixing in a weight ratio of 10 to 20 parts by weight,
The printing paper layer is formed of resin-impregnated printing paper in which melamine resin, polyvinylidene fluoride resin, and dimethyl acetamide are mixed in a weight ratio of 8:1:1, and the weight of the paper in the printing paper is 50 to 150 gsm,
The transparent paper layer is a mixed resin impregnated non-stretched polypropylene film in which melamine resin, PLA resin, non-phthalate plasticizer, acrylic copolymer and lubricant are mixed in a weight ratio of 5: 2: 1: 1: 1 is used,
The thermal compression is performed by sequentially stacking and positioning the phenolic resin impregnated kraft paper, waterproof board, printed paper layer, and transparent paper layer, and then at a press hot plate temperature of 120 to 150 ° C. at a pressure of 10 to 20 kgf / m ² for 20 to 60 minutes. Method for producing a surface-reinforced HPM waterproof sheet, characterized in that it is carried out by pressing. delete