JPH07137205A - Decorative sheet - Google Patents

Abstract

PURPOSE:To provide a decorative sheet for construction interior material with plural layers, of the calorific value at the time of combustion is suppressed, and which does not generate a toxic gas at the time of combustion and is superior in safety, has a picture pattern of high design property, is superior in high processability such as V cut, etc., and can be manufactured by the same processes as the manufacture of a conventional decorative sheet for which a vinyl chloride sheet is used. CONSTITUTION:A flexible polyester film 3 consisting of a copolymer polyester, of which a difference between the cold crystalization temperature and glass transition temperature is 60 deg.C or less, and which has a quasi-crystalization melting peak temeprature being at the cold crystalization temperature or higher and at the melting point or lower, and of which the tensile Young's mudulus is 0.1-50kg/mm<2> is laminated by heat-bonding on a fire-resistant resin layer 1 on which a picture patern print layer 2 is provided, and which contains 60-250 pts.wt. of magnesium hydroxide based on 100 pts.wt. of a polyolefine resin. Then, an embossing is applied on the surface of the flexible polyester film to form embossed depressed parts 4. In addition, an ink 5 is filled in the embossed depressed parts 4 by wiping, and then, a gloss-adjusting layer 6 is provided for the decorative sheet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative sheet using a flexible polyester film which is attached to various furnitures, building interior materials, etc. for the purpose of decoration or surface protection.

[0002]

2. Description of the Related Art Conventionally, a base sheet used for this type of decorative sheet is required to have a flexibility capable of fitting and adhering to the surface shape of an adherend to which the decorative sheet is adhered. It A vinyl chloride film is used as a base sheet for a decorative sheet having such material suitability. In addition to the above-mentioned flexibility, this vinyl chloride film has excellent suitability for other materials, that is, workability such as embossing, coloring, and adhesiveness. However, since this vinyl chloride film contains halogen group elements, it produces a toxic gas when burned, which is not preferable for safety. When adhered to the substrate, the plasticizer migrates to the adhesive layer and causes adhesion failure. In addition, thermal dimensional stability is poor, and elongation and shrinkage due to heat occur, which causes wrinkles and the like.

On the other hand, as a material for overcoming such drawbacks of the vinyl chloride film, there is a polyester film having flexibility and heat sealability. Since the flexible polyester film is only a transparent film, it is printed. When used as a base material for coating, even if a colored concealing solid layer is provided, the concealing property is inferior, and it is limited to expressing a highly designed design pattern. Also, since it is a single-layer decorative sheet, it has high processability such as V-cut. It is inferior to

Therefore, the present inventors applied for Japanese Patent Application No. 5-183283 as a decorative sheet for solving the above drawbacks. Although the above-mentioned various problems have been solved by such a constitution, as a new problem, when the base material layer is a polyolefin resin, the calorific value at the time of combustion is large, and there is a problem that it is not suitable for use as an interior finishing material.

[0005]

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 suppress the amount of heat generated during combustion as a building interior material and to improve safety. A multi-layered decorative sheet produced by the same process as the production of a conventional decorative sheet using a vinyl chloride sheet, which has an excellent and highly designed pattern and is also excellent in high processability such as embossing and V-cut. To provide.

[0006]

In order to achieve the above object, the decorative sheet of the present invention comprises a copolyester having a difference between the cold crystallization temperature and the glass transition temperature of 60 ° C. or less, and has a cold crystallization temperature. A flexible polyester film having a quasicrystal melting peak temperature of not lower than the melting point and having a tensile Young's modulus of 0.1 to 50 kg / mm ^2, a pattern printing layer, and a flame-retardant resin layer are laminated in this order. It is a feature.

The flame-retardant resin layer contains 60 to 250 magnesium hydroxide based on 100 parts by weight of the polyolefin resin.
It is characterized in that it is composed of parts by weight.

The flexible polyester film is characterized in that the surface of the flexible polyester film is embossed to form embossed recesses, the ink is filled in the embossed recesses by wiping, and then a gloss adjusting layer is provided. is there.

[0009]

The cosmetic sheet of the present invention has a constitution in which a flame-retardant resin layer is laminated on a flexible polyester film, so that the calorific value at the time of combustion is suppressed, and a toxic halogen group gas is generated. A decorative sheet that does not occur and is excellent in designability and post-processability and that is almost the same as the conventional doubling wiping decorative sheet using a vinyl chloride film can be manufactured under the same equipment and conditions.

Further, the flame-retardant resin layer has a composition in which magnesium hydroxide is contained in the polyolefin resin layer, and the content is 60 to 250 parts by weight of magnesium hydroxide based on 100 parts by weight of the polyolefin resin. By doing so, the amount of heat generated during combustion can be suppressed.

[0011]

EXAMPLES Examples will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a decorative sheet showing the laminated structure of the first embodiment, FIG. 2 is the laminated structure of the second embodiment, and FIG. 3 is the laminated structure of the third embodiment.

As can be seen from these figures, as the constitution of the decorative sheet, as shown in FIG. 1, a pattern printing layer 2 and a flexible polyester film 3 are sequentially provided on the upper surface of the flame-retardant resin layer 1, or 2, a pattern printing layer 2 and a flexible polyester film 3 are sequentially provided on the upper surface of the flame-retardant resin layer 1, and a recess 4 is formed on the surface of the flexible polyester film 3 by embossing. As shown in FIG. 5, there is a configuration in which the embossed concave portion 4 on the surface of the flexible polyester film 3 is filled with the wiping ink 5 and then the gloss adjusting layer 6 is provided.

Flame-retardant resin layer 1 as a base material for a decorative sheet
Is a polyolefin resin such as low density, high density polyethylene, linear low density polyethylene, polypropylene, polybutene, propylene-ethylene copolymer, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, The flame-retardant resin layer 1 preferably has a thickness of 50 to 150 μm in view of post-processability such as V-cutting and lapping, material cost, etc. .

The flame retardant added to the flame-retardant resin layer 1 does not contain a halogen compound and does not generate a toxic gas during combustion, such as magnesium hydroxide, aluminum hydroxide, zinc borate, hydrotalcite, It is a metal hydrate such as dawsonite alone or as a mixture, and magnesium hydroxide is most suitable from the viewpoint of the surface smoothness of the resin sheet and the adhesion to the pattern ink.

Magnesium hydroxide has a dispersibility with a resin,
In order to improve compatibility, higher fatty acids, higher alcohols,
Those subjected to surface treatment with paraffin, silane coupling agent, etc. are preferable. The blending amount is 60 parts by weight or more, preferably 60 to 250 parts by weight, based on 100 parts by weight of the resin content. If the amount is less than 60 parts by weight, the suppression of the amount of heat generated during combustion is insufficient.

The pattern printing layer 2 includes, for example, wood grain, stone grain,
The surface pattern, texture, abstract pattern, etc. of natural leather are printed, and any known vehicle can be used as an ink vehicle for providing an arbitrary pattern. In particular, magnesium hydroxide is 100% by weight of the polyolefin resin. 10 to the department
For a resin sheet containing 0 part by weight or more, vinyl acetate is used.
By using an acrylic ink, good adhesiveness and heat adhesiveness can be obtained without applying a primer layer.

The flexible polyester film 3 is made of a copolyester having a difference between the cold crystallization temperature and the glass transition temperature of 60 ° C. or less, has a quasi-crystal melting peak temperature of the cold crystallization temperature or more and the melting point or less, and is stretched. Young's modulus is 0.1
It is made of a polyester film of 50 kg / mm ² and has a breaking elongation higher than that of the soft vinyl chloride resin, a melting point and a Young's modulus higher than that of the soft vinyl chloride resin and lower than that of the polyester resin, and a humidity expansion coefficient and It is characterized by comprising a flexible polyester film having a coefficient of thermal expansion smaller than that of the soft vinyl chloride resin and containing neither a plasticizer nor a halogen group element.

As an example of the material for forming the polyester film, a copolyester resin having the following composition is preferably used. That is, as the soft segment forming this film, polyoxyalkylene glycol such as polyethylene glycol and polytetramethylene glycol, or HOOC- such as poly ε-caprolactone, azelaic acid, sebacic acid, dodecanedioic acid and dimer acid. [CH _2] fatty dicarboxylic acids and aliphatic _n -COOH and / or aliphatic polyesters composed of alicyclic diols are preferably used.

Further, as the hard segment forming this film, aromatic and / or alicyclic such as ethylene terephthalate, butylene terephthalate, cyclohexane dimethylene terephthalate, cyclohexane dimethylene cyclohexane dicarboxylate, butylene 2,6 naphthalene dicarboxylate, etc. It is preferably formed from at least one selected from group ester units.

Further, it is preferable that the alcohol component contains a 1,4 butanediol residue from the viewpoint of solvent resistance, and the 1,4 butanediol residue occupying the whole alcohol component forming the copolyester should be contained. It is preferably 40 mol% or more and 65 mol% or less.

Next, the flexible polyester film 3 is superposed on the surface of the flame-retardant resin layer 1 and is passed through a heat roll pressed against each other to be heat-sealed to produce one composite sheet. By applying pressure while heating, the flexible polyester film 3 is fused to the surface of the flame-retardant resin layer 1 on which the pattern printing layer 2 is formed to form one decorative sheet. If a conduit embossing roll is used as the doubling heat roll in the previous step, doubling and embossing can be performed simultaneously. Then, the steps such as doubling and embossing can be performed under the same conditions as for a normal polyvinyl chloride film.

Next, a paint or ink is used as the wiping ink 5 to be filled in the recesses 4 of the flexible polyester film 3, for example, natural resin or its modified resin, cellulose derivative, polyvinyl chloride resin. ,
A paint or ink is used in which a synthetic resin such as an acrylic resin, a polyester resin, or a polyurethane resin is used as a constituent material of a vehicle, and a coloring pigment, an extender pigment, a plasticizer, or the like is added to the vehicle. The vehicle used is preferably a urethane 2-liquid type. The wiping method may be any conventionally used wiping method such as a doctor blade method or a roll coating method.

The gloss adjusting layer 6 may be colorless transparent, colored transparent, or matte transparent, and is provided to adjust the glossiness of the surface of the decorative sheet. However, it also has a role of surface protection. The gloss adjusting layer 6 is formed by applying a paint using an appropriate vehicle, and the vehicle is one or two of thermosetting resins such as phenol resin, unsaturated polyester resin, epoxy resin and polyurethane resin. The above mixed resins can be used. In the paint forming the gloss adjusting layer 6, an appropriate amount of a matting agent is usually dispersed to give a desired glossiness, and examples of the matting agent include mica, silica, alumina, calcium carbonate, diatomaceous earth, silica sand and shirasu. A balloon or the like is used. As a method for applying the above-mentioned paint, a method such as gravure coating, roll coating, air knife coating, or the like is used.

Example 1 A 100 μm thick flame-retardant polyethylene sheet containing 100 parts by weight of magnesium hydroxide based on 100 parts by weight of low-density polyethylene was provided with a pattern printing layer by gravure printing, and then a thickness of 80 μm. The transparent soft polyester film of No. 1 and the printed pattern side of the flame-retardant polyethylene sheet printed as described above are overlapped, and heating conditions are 170 ° C. and speed is 2
Thermal lamination was performed under the conditions of 0 m / min and a nip pressure of 25 kg / cm ² to produce a decorative sheet for interior of building materials.

Example 2 Under the heat laminating conditions of Example 1, the printed surface of the printed polyethylene film containing magnesium hydroxide and the transparent soft polyester film were press-bonded between an embossing roll and a silicone rubber roll. By heat lamination, a decorative sheet for interior of building material having embossed recesses was obtained.

Example 3 A two-component urethane coloring ink was applied by a roll coating method to a transparent soft polyester film surface having the embossed concave portion formed on the surface thereof, and then applied to a portion other than the concave portion with a doctor blade. The coloring ink present was removed, and the coloring ink was filled in the recesses formed on the surface of the laminated sheet and solidified. Further, a dulling wiping decorative sheet having a high design and high processability was obtained by coating the sheet with a gloss adjusting paint with a gravure coater having a plate depth of 60 μm.

[0027]

Since the cosmetic sheet of the present invention is constructed as described above, since the polymer does not contain a plasticizer unlike the conventional vinyl chloride film, the adhesiveness due to the bleed of the plasticizer is improved. There are no problems such as deterioration or surface contamination, and since no toxic gas is generated during combustion, environmental problems can be eliminated.

By laminating the present decorative sheet on a decorative plate substrate, a highly designed design pattern can be expressed, and a decorative plate excellent in workability such as V-cut and wrapping can be obtained.

Further, since a decorative sheet can be obtained under the same manufacturing method and conditions as for a decorative sheet using vinyl chloride film, there is no need for wasteful capital investment such as addition of new equipment or modification of equipment.

Further, the flame-retardant resin layer has a composition in which magnesium hydroxide is contained in the polyolefin resin layer, and the content is 60 to 250 parts by weight of magnesium hydroxide based on 100 parts by weight of the polyolefin resin. By doing so, the calorific value at the time of combustion is suppressed, and it becomes sufficiently compliant with the standard as a building interior material.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a laminated structure of a decorative sheet according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a laminated structure of a decorative sheet according to a second embodiment of the present invention.

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

[Explanation of symbols]

 1 Flame-retardant resin layer 2 Pattern printing layer 3 Flexible polyester resin 4 Embossed recess 5 Wiping ink 6 Gloss adjusting layer

Claims (3)

[Claims] 1. A copolymerized polyester having a difference between the cold crystallization temperature and the glass transition temperature of 60 ° C. or less, a quasi-crystal melting peak temperature of the cold crystallization temperature or more and the melting point or less, and a tensile Young's modulus of 0.1. A decorative sheet comprising a flexible polyester film of 1 to 50 kg / mm ^2, a pattern printing layer, and a flame-retardant resin layer laminated in this order. 2. The flame-retardant resin layer comprises 60 to 25 magnesium hydroxide based on 100 parts by weight of polyolefin resin.
The decorative sheet according to claim 1, wherein the decorative sheet has a composition containing 0 part by weight. 3. The embossed concave portion is formed by embossing the surface of the flexible polyester film, and the embossed concave portion is filled with ink by wiping, and then a gloss adjusting layer is provided. The decorative sheet according to claim 1.