JPH10278187A - Cosmetic material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cosmetic material having a harmful formaldehyde trapping performance with respect to a substrate bonded by an adhesive or an adhesive such as a urea-based adhesive for bonding to the substrate. Is to provide. SOLUTION: A decorative material is provided in which a sheet hardly allowing formaldehyde to permeate is laminated on one surface of a base material and a formaldehyde capturing layer is laminated on the other surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative material used for various kinds of furniture, building interior materials and the like, and more particularly to a decorative material for preventing formaldehyde emission from a base material.

[0002]

2. Description of the Related Art Conventionally, as this kind of decorative material, a printed sheet obtained by using a paper or a synthetic resin sheet as a base sheet and performing printing thereon is used as it is, and is used by being bonded to the surface of the base material. ing. However, there are many base materials to which the decorative sheet is attached, in which a formaldehyde-emitting material is used. For example, an adhesive for forming a wood plywood, a wood fiber board, a particle board, or the like, a resin constituting the FRP, or a resin constituting the resin base material itself uses a formaldehyde-emitting substance such as a urea resin. . Therefore, when a printing sheet is stuck on such a base material as it is, formaldehyde is emitted into a room or the like.

Therefore, for these substrates, measures such as using a resin containing no formaldehyde, such as vinyl acetate resin, and adding a formaldehyde scavenger composed of an organic amino compound to the resin are taken. But,
Formaldehyde-free resins have weak adhesion,
In the case of plywood, there is a problem that the adhesive strength between the layers is insufficient (particularly, the initial adhesive strength is weak), and in the case of particle board, wood fiber plate, and FRP, the physical properties such as strength are changed. The use of formaldehyde scavenger added to the adhesive increases the price and
There was a problem that the physical properties of the finished product might change. Further, when an adhesive such as a urea-based adhesive is used as an adhesive for attaching a decorative sheet to a decorative plate, there is also a problem that formaldehyde may be released from the adhesive.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a substrate bonded by an adhesive or a urea for bonding to a substrate. An object of the present invention is to provide a cosmetic material having a function of trapping harmful formaldehyde with respect to an adhesive using a system or the like.

[0005]

In order to achieve the above object, according to the present invention, a sheet which is hardly permeated with formaldehyde is laminated on one surface of a substrate, and a formaldehyde trapping layer is laminated on the other surface. The decorative material is characterized in that the decorative processing layer is laminated on at least one surface of the base material. With this configuration, formaldehyde generated from the base material or an adhesive used for attaching the sheet to the base material is prevented from releasing formaldehyde on one surface by a sheet that does not easily transmit formaldehyde, and It is trapped and adsorbed by the formaldehyde trapping agent contained in the formaldehyde trapping layer laminated on the surface, so that formaldehyde is not released from the surface side, so that the irritating odor due to formaldehyde is extremely reduced. . In addition, since the decoration treatment layer is provided on the surface of the base material, it becomes a decorative material having excellent design properties.

Further, since the formaldehyde-trapping layer is formed on at least one surface of the base sheet, it is easy to form the formaldehyde-trapping layer on the base material, and thus, formaldehyde can be reliably trapped and adsorbed. be able to.

[0007] Further, when the base sheet is a sheet hardly permeating formaldehyde, the formaldehyde trapping layer is formed on the base material side of the base sheet. By doing so, formaldehyde generated from the base material is prevented from being released to the outside by a sheet that is difficult to transmit formaldehyde, and the formaldehyde trapping layer is provided on the base material side of the sheet that does not easily transmit formaldehyde. The trapping and adsorption of the generated formaldehyde becomes more reliable, and the emission to the outside is extremely reduced.

Further, by forming the base sheet into a laminated sheet formed by bonding two paper-based sheets through an extrusion coat layer of a thermoplastic synthetic resin, a formaldehyde trapping layer can be easily formed, and the two-sided sheet is bonded. Also, the formaldehyde can be firmly bonded to the surface to be bonded through this sheet, and the extruded coat layer of the thermoplastic synthetic resin is difficult to transmit formaldehyde. This makes it easier to be trapped and adsorbed, and the emission to the outside is further reduced.

Further, when the base sheet is formed of a paper-based sheet that easily permeates formaldehyde, it is easy to apply and form an ink or the like containing a formaldehyde scavenger on the front and back surfaces thereof, and further has a gas permeability. It is also possible to reduce the emission of formaldehyde from the cleave surface of the base material, etc., and to decorate the formaldehyde-trapping layer with an ink containing a formaldehyde-trapping agent on the outer surface of the decorative material. Thus, it is possible to reduce the emission of formaldehyde to the outside together with the decorative effect without being formed.

A formaldehyde scavenger may be contained in the base material side of the sheet hardly penetrating the formaldehyde or a primer layer provided as necessary on the base sheet, or the primer layer may be a formaldehyde scavenging layer. Formaldehyde can be adsorbed without forming a separate formaldehyde-trapping layer, and by separating it from the formaldehyde-trapping layer, the probability of being adsorbed increases and the emission to the outside is reduced. It is.

[0011] Further, by laminating the formaldehyde-permeable sheet or the formaldehyde-trapping layer on the lip surface of the decorative material described above, volatilization of formaldehyde from the lip surface is not transmitted or trapped. To prevent the emission of formaldehyde to the outside.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the cosmetic material of the present invention will be described.
This will be described with reference to FIGS. FIG. 1 is a sectional view schematically showing the structure of a decorative material 10 according to the first embodiment of the present invention. The decorative material 10 has a configuration in which a decorative sheet 6 having a decorative treatment layer 6 provided on the upper surface of a sheet 3 which is difficult to transmit formaldehyde through the adhesive layer 5 is laminated on the surface of the base material 2 and a formaldehyde capturing layer 4 is laminated on the back surface. Formaldehyde generated from the base material or the adhesive used for attaching the sheet to the base material is blocked from being released from the front side of the base material by the sheet 3 that is difficult to transmit formaldehyde, and from the back side. Since it is trapped and adsorbed by the formaldehyde trapping agent contained in the formaldehyde trapping layer 4, it is not released to the outside, so that the irritating odor due to formaldehyde is extremely reduced.

The base material 2 on which the decorative sheet made of the sheet 3 hardly allowing formaldehyde to permeate on the front side (upper side) and the formaldehyde trapping layer 4 on the back side (lower side) of the present invention is made of a formaldehyde-dispersing resin between the layers. There are wood plywood (including so-called glulam) used as an adhesive, particle board or wood fiber board (MDF, etc.) using formaldehyde-emitting resin as a binder.
In the present invention, formaldehyde-emitting resin alone,
A compound obtained by kneading or impregnating a formaldehyde-dispersing resin with a fibrous material (FRP in a broad sense) or the like can also be used.

Examples of the formaldehyde-dispersing resin include a phenol resin obtained by condensation polymerization of phenol (phenyl carbonate) and formaldehyde, and urea (or urea / formaldehyde) obtained by polymerization of urea and formaldehyde.
There are aminoalkyd resins, melamine resins, and the like obtained by adding melamine resins, urea resins, guanamine resins, and the like to resins and alkyd resins. It is believed that the presence of formaldehyde in the resinous material is mainly due to the following reasons. That is, (1) when the resin remains as an unreacted product,
(2) If it remains as released during the curing reaction (heating and pressurizing), (3) if it remains as captured by materials other than resin (wood, paper, etc.), (4) Due to the aging of the resin It is considered that it decomposes, etc., and then emits formaldehyde gas at the time of use, thereby giving off an irritating odor of formalin.

The formaldehyde-impermeable sheet 3 used in the decorative sheet used in the present invention is made of polyethylene film, polypropylene film, polyvinyl chloride film, polyethylene terephthalate film, polycarbonate film, acrylic resin film, nylon film, polystyrene film. , Ethylene-vinyl acetate copolymer film, ethylene-vinyl alcohol copolymer film, polyester, synthetic resin fiber such as vinylon, plastic film such as ionomer,
A single layer or a laminated structure of two or more layers such as a metal foil or sheet of iron, aluminum, copper or the like is selected and used depending on the application. In the case where the decorative layer is applied by printing, the thermoplastic film such as a polypropylene film, a polyvinyl chloride film, a polyethylene terephthalate film, or the like is used in consideration of good ink adhesion, high strength, and ease of molding. A resin film and a composite paper in which two thin papers, such as thin paper, inter-sheet reinforced paper, and mixed paper, are bonded via an extrusion coat layer of a thermoplastic synthetic resin such as a polyethylene resin, are preferably used. The decorative processing layer 6 is printed and used.

The formaldehyde trapping layer 4 is made of nitrified cotton / alkyd, cellulose, vinyl chloride, vinyl chloride-
Solvents such as vinyl acetate, acrylic, ester, urethane, etc., and emulsion type vehicles are arbitrarily mixed with a formaldehyde trapping substance and additives, etc., and are kneaded. It can be formed by applying or impregnating a sheet that is difficult to make or a base sheet described later.

A typical formaldehyde-scavenging substance that can be used in the present invention is an organic amino compound, which reacts easily with formaldehyde, and its product does not dissociate formaldehyde. For example, urea, ethylene urea, propylene urea, 5-hydroxypropylene urea, 5-methoxy propylene urea, 5-methyl propylene urea, parabanic acid (glyoxal monourein), 4,5-dimethoxy ethylene urea, pyrrolidine , Piperidine, morpholine,
Examples thereof include amines such as dicyandiamide, 2-hydrazobenzothiazole or derivatives thereof, amides, and imides. Further, ammonium hydroxide may be added as needed. Further, the formaldehyde trapping substance may be supported on an inorganic powder such as silica, talc, clay, activated carbon, zeolite, and sepiolite.

This cosmetic material 10 has formaldehyde impermeability on one side and formaldehyde trapping property on the other side, so that formaldehyde is prevented from being released from the front and back surfaces. Since the side surfaces of the decorative material 10 are not subjected to formaldehyde trapping treatment, formaldehyde can be released from here, but the area of the side surfaces is smaller than that of the front and back surfaces, the release of formaldehyde is small, and the speed is low. Therefore, most of the formaldehyde is trapped by the formaldehyde scavenger distributed over a large area, and only a small amount of formaldehyde is emitted to the outside world.

FIG. 2 schematically shows a sectional structure of a decorative material 20 according to a second embodiment of the present invention. Hereinafter, the same reference numerals as those of the already described components are used, and duplicate description will be omitted. The makeup material 20 of the present embodiment is different from the makeup material 10 of the first embodiment in the configuration of the formaldehyde trapping layer 4. The formaldehyde trapping sheet 4a of the decorative material 20 has a formaldehyde trapping layer 41 formed on at least one surface of a paper-based sheet 42, and is adhered so that the formaldehyde trapping layer 41 faces the base material side. Formaldehyde generated from the substrate can be more effectively captured. Although not shown, since the base sheet is made of a paper-based sheet that easily permeates formaldehyde, the formaldehyde capturing layer 41 may be provided on the front (outer) side of the paper-based sheet 42 or on both sides. It may be provided.

The paper-based sheet 42 is, for example, paper such as tissue paper, bleached kraft paper, titanium paper, paperboard, or gypsum board paper. In particular, tissue paper weighing 20 to 80 g / m ² is used.
It is preferably used because it is not only inexpensive but also excellent in the suitability for coating a resin solution containing a formaldehyde scavenger and excellent in air permeability.

FIG. 3 schematically shows a sectional structure of a decorative material 30 according to a third embodiment of the present invention. Cosmetic material 30 of the present embodiment
Is different from the decorative material 20 of the second embodiment in the configuration of the formaldehyde capturing sheet 4b. The formaldehyde-trapping sheet 4b of the decorative material 30 has a formaldehyde-trapping layer 4
1 and the formaldehyde trapping layer 41
Base material 2 of sheet 3 which is difficult to transmit formaldehyde
Formed on the side. Formaldehyde generated from the base material 2 is prevented from being released to the outside by the sheet 3 that does not easily transmit formaldehyde, and the formaldehyde capturing layer 41 is provided on the base material 2 side of the sheet 3 that does not easily transmit formaldehyde. Thus, the probability that formaldehyde generated is trapped is increased, and the emission to the surface is extremely reduced.

FIG. 4 schematically shows a sectional structure of a decorative material 40 according to a fourth embodiment of the present invention. The formaldehyde capturing sheet 4c of the decorative material 40 is a sheet 3 in which the base sheet is hardly permeable to formaldehyde, but in the structure thereof, the paper-based sheets 42 are adhered to both surfaces of the thermoplastic resin layer 43 hardly permeable to formaldehyde. It is different from the decorative material 30 of the third embodiment in that it has a three-layer structure. Formaldehyde trapping layer 41 like cosmetic material 30
Base material 2 of sheet 3 which is difficult to transmit formaldehyde
Formed on the side. By having the paper-based sheet 42 on the surface of the sheet 3 that is less permeable to formaldehyde,
The formaldehyde trapping layer can be easily formed and adhered to the base material, and when the decorative material is laminated on another member, the surface is a paper layer, so that it can be firmly bonded. Further, in the third and fourth embodiments, the front and back surfaces are also configured to have moisture-proof properties, so that the decorative material can be prevented from warping or the like.

Examples of the thermoplastic resin 43 that does not easily transmit formaldehyde include polyethylene, polypropylene,
Polyolefin resins such as ethylene-vinyl acetate copolymer, vinyl chloride resins, polyester resins, polyamide resins and the like can be used. As a method for producing such a three-layered laminate, a paper-based sheet 4 is used.
2 and a thermoplastic resin layer 43 using or not using an adhesive, a method of bonding by heat or the like, two paper-based sheets 42
There is a method in which the layer of the thermoplastic resin layer 43 is melt-extruded and simultaneously laminated by an extrusion lamination method, and a suitable laminating method is selected according to the type of the thermoplastic resin layer 43 used. Here, a molten resin is extruded using a polyethylene resin, and paper-based sheets 42 are laminated on both sides by an extrusion lamination method.

FIG. 5 schematically shows a sectional structure of a decorative material 50 according to a fifth embodiment of the present invention. This cosmetic material 50
Is a paper-based sheet 4d.
2 and decorative treatment layer 6a containing formaldehyde scavenger
Consisting of In this case, it is a decorative material having the decorative processing layers 6 and 6a formed on both sides and having excellent design properties, and can be easily used as a double-sided design member such as a sink door. In addition, by including a formaldehyde scavenger in the decoration treatment layer 6, the effect can be exerted without forming a separate formaldehyde scavenging layer.

Although the first to fifth embodiments have been described, the present invention is not limited to these embodiments.
For example, in the first to fourth embodiments, the decoration treatment layer 6 has been described as being formed on the sheet on the side that does not trap formaldehyde. However, the decoration treatment layer 6 is formed on the formaldehyde trapping layer side, which is the opposite side, and on both sides thereof. In the fifth embodiment, either surface may be used as the front surface or the back surface. Furthermore, although not described in the above embodiment, a sheet that hardly allows formaldehyde to permeate or a sheet on which a formaldehyde capturing layer or a capturing layer thereof is formed may be provided on the lip end of the present decorative material. Formaldehyde released from the base material to the outside is reduced, resulting in a cosmetic material having almost no formaldehyde odor.

Examples of a method of laminating these various substrates 2 include a method of laminating a plate-shaped substrate by pressing with a pressure roller via an adhesive, a method of laminating a surface of a molded substrate and a decorative sheet. So-called vacuum press laminating method in which a decorative sheet is laminated on the surface of a molding substrate by a pressure difference due to vacuum suction from the molding substrate side, or a column, a polygonal column. In the long axis direction of the columnar base material, etc., while the decorative sheet is supplied through an adhesive layer between the base materials, the decorative sheets are sequentially pressure-adhered to a plurality of side surfaces constituting the columnar body by rollers having different directions. So-called lapping method and the like.

The adherends whose surfaces are decorated include decorative materials for building interiors such as walls, floors and ceilings, window frames,
It is used as a surface decoration material for fittings such as doors and handrails, and a surface decoration material for furniture such as a chest of drawers. In that case, if necessary, a surface protective layer made of a transparent resin may be formed on the outermost surface of the decorative material to protect it from wear, water, chemicals, and the like. , A cellulose resin, an acrylic resin, an unsaturated polyester resin, an epoxy resin, a fluororesin and the like. Further, an antibacterial agent, a fungicide, or the like may be added to a layer other than the base material of the present decorative material, so that the decorative material has the required performance.

Example 1 Using a 150 μm-thick colored vinyl chloride film, a woodgrain pattern layer was printed by gravure printing using an ink composed of a vinyl chloride-acrylic resin to obtain a vinyl chloride decorative sheet. The formaldehyde-trapping sheet is formed by using a composite sheet consisting of a weighed 30 g / m ² sheet-reinforced paper / 30 μm polyethylene resin layer / a weighed 30 g / m ² sheet-reinforced paper, and the upper surface of the sheet reinforced tissue is used. 5 Formaldehyde scavenger paint with the following composition
g / m ² (when dried). Formaldehyde scavenger paint composition Resin (casein) 14 parts by weight Formaldehyde scavenger (Rikkenren FC-18-6 manufactured by Miki Riken Co., Ltd.) 14 parts by weight Water 66 parts by weight Methanol 5.5 parts by weight Defoamer 0.5 parts by weight Then, a 2.7 mm MDF plate was prepared as a base material, and the decorative sheet was coated on one side with an ethylene vinyl acetate emulsion type adhesive, and the formaldehyde on the formaldehyde capturing sheet on the other side. Adhesion was performed using an ethylene vinyl acetate emulsion adhesive so that the scavenger layer faced to obtain a decorative material having a formaldehyde scavenger layer.

Example 2 A decorative material having a formaldehyde-trapping layer was obtained in the same manner as in Example 1 except that a sheet-reinforced thin paper weighing 30 g / m ² was used as the base sheet of the formaldehyde-trapping sheet.

Comparative Example 1 Using a colored vinyl chloride film having a thickness of 150 μm, a woodgrain pattern layer was printed by gravure printing using an ink composed of a vinyl chloride-acrylic resin to obtain a vinyl chloride decorative sheet. Next, a 2.7 mm MD as a substrate
An F plate was prepared and adhered to one surface thereof using an ethylene vinyl acetate emulsion adhesive to obtain a decorative material.

Then, 12 pieces of 5 × 15 cm sample pieces were cut out from the above-mentioned decorative material, and the 12 pieces of sample pieces having a diameter of 2 mm were cut out.
Put into a 4 cm desiccator, put 300 ml of distilled water into a petri dish placed at the bottom center of the desiccator,
After standing at 20 ° C. for 24 hours, the amount of formaldehyde absorbed in distilled water was measured by acetylacetone colorimetry. As a result of measuring the formaldehyde concentration in this way, the amount of formaldehyde generated was 1.1 mg / l for the cosmetic material of Example 1, 1.0 mg / l for the cosmetic material of Example 2,
In the cosmetic material of Comparative Example 1, the amount was 3.3 mg / l.

[0032]

As described above, the cosmetic material of the present invention has:
A sheet that hardly transmits formaldehyde through an adhesive layer is laminated on one side of the substrate, and a formaldehyde trapping layer is laminated on the other side, so that the substrate itself or a decorative sheet or the like is laminated on the substrate. Formaldehyde with an extremely strong irritating odor generated from the adhesive used to adhere the product is blocked on the substrate sheet side where formaldehyde is hardly permeated, and captured by the formaldehyde capturing agent on the other formaldehyde capturing layer side Since formaldehyde is adsorbed, formaldehyde is not released from the surface, so that the irritating odor due to formaldehyde is extremely reduced. In addition, a decorative material having excellent design properties can be obtained because the decoration treatment layer is provided on the surface of the base material.

Further, by laminating the formaldehyde-trapping layer on at least one surface of the base sheet, it is easy to form the formaldehyde-trapping layer on the base sheet surface, and the formaldehyde-trapping layer is reliably trapped and adsorbed. As a result, a cosmetic material having excellent formaldehyde trapping performance can be obtained.

Further, by making the base sheet forming the formaldehyde-trapping sheet a sheet that is less permeable to formaldehyde, trapping and adsorption of formaldehyde generated from the base material can be performed more reliably and easily. By forming the paper-based sheet into a three-layer structure in which the sheet is bonded through an extrusion coat layer of a thermoplastic resin, the adhesiveness of both sides is increased, and the surface bonded through the formaldehyde capturing sheet can be firmly bonded. I can do it. Further, it is possible to obtain a decorative material which can prevent the decorative material itself from warping due to moisture absorption or release from the back surface of the base material.

In addition, by forming the base sheet as a paper-based sheet that easily allows formaldehyde to permeate, it is easy to apply and form an ink or the like containing a formaldehyde scavenger on the front and back surfaces, and since it has air permeability,
It is also possible to reduce the emission of formaldehyde from the cleave surface of the base material, etc., and to decorate the formaldehyde-trapping layer with an ink containing a formaldehyde-trapping agent on the outer surface of the decorative material. Thus, it is possible to reduce the emission of formaldehyde to the outside together with the decorative effect without being formed.

Further, by providing a sheet that does not easily transmit formaldehyde or a sheet on which a formaldehyde trapping layer or a trapping layer is formed, the formaldehyde released from the base material to the outside can be further reduced by providing a formaldehyde-permeable sheet or a sheet formed with the trapping layer on the mouth of the decorative material. Excellent cosmetic material with very little odor.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically illustrating a structure of a decorative material according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view schematically illustrating a structure of a decorative material according to a second embodiment of the present invention.

FIG. 3 is a sectional view schematically showing a structure of a decorative material according to a third embodiment of the present invention.

FIG. 4 is a sectional view schematically showing a structure of a decorative material according to a fourth embodiment of the present invention.

FIG. 5 is a sectional view schematically showing a structure of a decorative material according to a fifth embodiment of the present invention.

[Explanation of symbols]

10, 20, 30, 40, 50 Cosmetic material 2 Base material 3 Formaldehyde-impermeable sheet 4, 41 Formaldehyde-trapping layer 4a, 4b, 4c, 4d Formaldehyde-trapping sheet 42 Paper-based sheet 43 Thermoplastic resin layer 5 Adhesive layer 6 Decoration treatment layer 6a Decoration treatment layer containing formaldehyde scavenger

Claims (8)

[Claims] 1. A decorative material characterized in that a sheet hardly allowing formaldehyde to permeate is laminated on one surface of a base material, and a formaldehyde trapping layer is laminated on the other surface. 2. The decorative material according to claim 1, wherein a decorative treatment layer is laminated on at least one surface of the base material. 3. The decorative material according to claim 1, wherein the formaldehyde trapping layer is formed on at least one surface of the base sheet. 4. The makeup according to claim 3, wherein when the base sheet is made of a sheet that does not easily transmit formaldehyde, the formaldehyde trapping layer is formed on the base sheet side of the base sheet. Wood. 5. The decorative material according to claim 4, wherein said base sheet is a laminated sheet obtained by bonding two paper-based sheets through an extrusion coat layer of a thermoplastic synthetic resin. 6. When the base sheet is made of a paper-based sheet that easily allows formaldehyde to permeate, a decoration treatment layer is provided on a surface of the paper-based sheet opposite to the base material, and the formaldehyde is provided on at least one surface thereof. The decorative material according to claim 3, wherein a trapping layer is formed. 7. A formaldehyde trapping agent is contained in the base material side of the sheet hardly penetrating the formaldehyde or a primer layer provided as necessary on the base sheet, or the primer layer is a formaldehyde trapping layer. The decorative material according to any one of claims 1 to 6, wherein 8. The decorative material according to any one of claims 1 to 7, wherein a sheet or a formaldehyde-trapping layer hardly permeating formaldehyde is laminated on the mouth of the decorative material. Wood.