JP6094191B2 - Polyolefin decorative sheet with antistatic function - Google Patents

Description

  The present invention relates to a decorative sheet to be bonded to the surface in order to improve the design and durability of natural wood, plywood, laminated wood, aluminum material, steel plate material, stone material, inorganic material, asphalt, concrete, etc. The present invention relates to a polyolefin-based decorative sheet having an antistatic function, which is used on the surface of indoor flooring.

  The decorative sheet is bonded to various base materials in order to impart design properties. Initially, a decorative sheet made of paper or polyvinyl chloride resin was mainly manufactured and used. However, with the recent increase in interest in environmental problems, decorative sheets made of polyvinyl chloride resin have been avoided, and in place of them, those based on polyolefin resins have been used favorably.

  Various problems have been pointed out at the time of switching from a polyvinyl chloride resin to a polyolefin resin for a decorative sheet, but many of them have been solved by the maturity of technology. However, it has been difficult to impart performance equivalent to that of a decorative sheet made of a polyolefin resin to a decorative sheet made of a polyolefin resin in a part related to electrostatic charging and a part related to flame retardancy. Therefore, for example, with regard to the former electrostatic charge, it becomes easy to charge static electricity on the surface of the decorative sheet, especially in the winter when the humidity is low. For example, dust easily collects or accumulates at the edges or gaps. There is a problem that it is difficult to remove dust. In addition, when used for the surface layer of flooring, indoor doors, joinery, etc., the static electricity is likely to be discharged (sparked), and the living space becomes uncomfortable.

  The high chargeability of polyolefin resin is a part derived from its material, and fundamental countermeasures are difficult, but the type in which surfactant is sprayed on the surface layer, the type in which conductive material is added to the resin, and polyether A type in which a polymer type antistatic agent such as an ester-amide type is added (for example, see Patent Document 1) has been proposed.

  However, it is difficult to maintain the effect over a long period of time, for example, with a surfactant spraying type, and if a conductive material is added or a polymer type is effective without adding a considerable amount of conductive material. Since it is not expressed, there is a problem that the influence on the mechanical properties and the like of the polyolefin resin is increased and the optical properties such as transparency are affected. Moreover, as a problem common to all, all must be approach to the outermost layer, and when the above measure was applied to the intermediate layer, the effect of preventing charging was hardly seen. For this reason, the prescription using conventional antistatic agents makes it difficult to maintain the antistatic effect over a long period of time, and the antistatic material has a considerable effect on the physical properties of the decorative sheet, leading to performance degradation. There was a problem, such as being loose.

Japanese Patent No. 4863748

  The object of the present invention is to provide the effect of preventing charging as described above to the polyolefin resin decorative sheet, thereby reducing the charging property derived from the polyolefin resin material, for example, the flooring surface layer. Even when used for decoration, it is effective as a decorative sheet while suppressing the accumulation of static electricity-derived dust in the cadence and gaps, and also preventing static electricity-derived sparks. It is to set the specifications of the polyolefin-based decorative sheet having an antistatic function so that the performance, particularly the adhesion of the surface protective layer after being subjected to environmental load is maintained.

The present invention solves this problem, that is, the invention according to claim 1 is a polyolefin-based decorative sheet having at least one polyolefin-based resin layer and a surface protective layer, wherein at least one of the polyolefin-based resin layers. In one layer, a semipolar organic compound having one atomic group represented by the following chemical formula 1 in the molecule and at least one linear saturated hydrocarbon having 11 to 22 carbon atoms, and chemical formulas 7, 8 , and 9 be added a basic organic compound and formed of a composition obtained by mixing an antistatic agent represented by either of, not by adding an antistatic agent prior Symbol surface protective layer,
The polyolefin-based resin layer to which the antistatic agent is added is made of a polypropylene resin having a heat of fusion measured by differential scanning calorimetric measurement of 70 to 170 J / g,
A polyolefin-based decorative sheet having an antistatic function , wherein the addition amount of the antistatic agent is 0.1 to 5.0 parts by weight with respect to 100 parts by weight of the polypropylene resin in the polyolefin-based resin layer. It is.

The invention according to its second aspect, wherein the thickness of the surface protective layer is 3 to 30 .mu.m, a polyolefin-based decorative sheet having an antistatic function according to claim 1.

The invention according to claim 3 is that the polyolefin resin layer is laminated by coextrusion of two or more layers, and at least one of them is a polyolefin resin layer to which the antistatic agent is added. The polyolefin decorative sheet having an antistatic function according to claim 1 or 2 , characterized in that it is a feature.

The invention according to claim 4 is characterized in that the polyolefin resin layer is laminated by coextrusion of three layers, and an intermediate layer thereof is a polyolefin resin layer formed by adding the antistatic agent. A polyolefin-based decorative sheet having an antistatic function according to claim 1 or 2 .

The invention according to the claim 5, wherein said basic organic compound and a semi-polar organic compound, the proportion of each additive amount is 2: 1 to 1: characterized in der Rukoto within 2 range, claims 5. A polyolefin-based decorative sheet having an antistatic function according to any one of 1 to 4 .

  According to the first aspect of the present invention, the antistatic agent having the specific structure shown in the first aspect is added to the polyolefin resin layer without adding the antistatic agent to the surface protective layer. As a result, an antistatic effect is exhibited. The mechanism of this effect is that the semipolar organic compound is the donor and the basic organic compound is the acceptor, and the ion conduction mechanism works by the Coulomb force between them, and the static electricity charged on the outermost layer is added to the antistatic agent. It is because it leaks to the layer which was done. And since the antistatic agent is not added to the surface protective layer, the surface physical properties of the decorative sheet are not adversely affected. By using the polyolefin-based decorative sheet having the antistatic function of the present invention on the floor material surface, it is possible to prevent dust adsorption and to generate sparks under the living environment (static electricity generated by friction between the floor material and the back of the slippers of indoor shoes). Discharge) and the like can be prevented and suppressed.

In addition, since the polyolefin resin of the polyolefin resin layer is the above polypropylene resin, compared with the case where other polyolefin resin such as polyethylene is used, the decrease in interfacial lamination adhesion due to bleed out of the antistatic agent, and It is possible to suppress a reduction in the effect due to precipitation of the antistatic agent. This is because the high crystallinity of the polypropylene resin suppresses the mobility of the antistatic agent.
Furthermore, by limiting the addition amount of the antistatic agent, it is possible to improve the design as a decorative sheet by maintaining the antistatic function and making the polyolefin resin layer sufficiently transparent Become.

According to the second aspect of the present invention, by limiting the layer thickness of the surface protective layer, it is possible to maintain the surface physical properties as a decorative sheet while maintaining the antistatic function.

According to the present invention, the polyolefin resin layer to which an antistatic agent is added is laminated by coextrusion according to the invention described in claims 3 and 4 , thereby minimizing the decrease in interfacial lamination adhesion due to bleedout of the antistatic agent. It becomes possible to limit to the limit.

According to the present invention, the semipolar organic compound and the basic organic compound used as an antistatic agent can be put into practical use as long as the ratio of the respective addition amounts is in the range of 2: 1 to 1: 2. Can exhibit a typical antistatic function.

It is explanatory drawing which shows the structure of the cross section of one Example of the laminated body for flooring surfaces of this invention.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows a cross-sectional structure of an example of a polyolefin-based decorative sheet having an antistatic function of the present invention. It consists of the laminated body of the base material sheet 1, the pattern pattern layer 2, the polyolefin resin layer 3 (31, 32), and the surface protective layer 4.

  As the base material sheet 1, a conventionally known material can be used as long as it is made of a material and a thickness suitable for providing the pattern bag-like layer 2 described later. Although it does not specifically limit, what consists of polyolefin resin instead of polyvinyl chloride resin is preferable. It is preferable to color appropriately in order to provide concealability to the base on which the decorative sheet is bonded. The thickness is preferably about 50 to 100 μm in view of concealing property, handling property, economy and the like.

  The pattern-like layer 2 is suitably provided for the purpose of improving design properties or imparting concealability. The material of the pattern layer 2 is not particularly limited, but a colorant such as a dye or pigment or an extender pigment is added to an acrylic, olefin, ester, urethane, vinyl acetate, or other binder. Further, those obtained by arbitrarily adding plasticizers, stabilizers, waxes, greases, drying agents, curing agents, thickeners, dispersants, fillers and the like are suitably used. Prepare a coating solution prepared by sufficiently kneading the above materials with a solvent, diluent, etc., and use a known printing method such as gravure printing, intaglio printing, flexographic printing, silk printing, electrostatic printing, inkjet printing, or spraying or brushing. It can provide by laminating | stacking by the well-known coating method using etc. The pattern pattern layer 2 may be printed on the polyolefin resin layer 3 side, which will be described later, or on the base sheet 1 side. In addition, a method of providing a primer coat layer (not shown) as needed is also preferably used for the purpose of improving the adhesion of the ink and improving the concealing property.

  The material of the polyolefin resin layer 3 (31, 32) in the present invention is not particularly limited as long as it is a polyolefin material composed of carbon and oxygen, but it is resistant to scratching and bleeding out of additives. For comprehensive evaluation including ease and even economic efficiency, it is particularly desirable to use polypropylene materials, and those using highly crystalline resins such as homopolypropylene have predetermined mechanical properties and latent heat of fusion shown below. It is still desirable to set a numerical range of.

  As an index indicating the degree of crystallinity of the polypropylene resin, the amount of heat necessary for melting the crystal, so-called heat of fusion, is preferably used. When the latent heat of fusion is 70 J / g or less, sufficient crystal components are not generated and there are many non-crystal components, so that antistatic agent bleeding tends to occur somewhat. If it is 170 J / g or more, it cannot be a normal polypropylene resin, but if it becomes temporary, since there are too few non-crystalline parts, it will be unevenly distributed in the non-crystalline part with a small amount of additives. The problem is likely to occur.

  In order to improve the design and texture of the decorative sheet, the surface of the polyolefin resin layer 3 may be provided with various uneven patterns such as wood grain, satin, and abstract pattern.

  At least one of the polyolefin-based resin layers 3 (31, 32) includes at least one atomic group represented by the above chemical formula 1 and a linear saturated hydrocarbon having 11 to 22 carbon atoms in the molecule. An antistatic agent comprising a composition obtained by mixing a semipolar organic compound having a basic organic compound represented by Chemical Formula 2 in the molecule is added. In the figure, for convenience, the polyolefin resin layer 3 is described as being composed of two layers of a polyolefin resin layer 31 and a polyolefin resin layer 32, but it may be a single layer or a multilayer of three or more layers. Good.

  In the present invention, the antipolar organic compound having at least one atomic group represented by Chemical Formula 1 and one straight chain saturated hydrocarbon having 11 to 22 carbon atoms in the molecule is specifically represented by the following chemical formula. 3, Chemical Formula 4, Chemical Formula 5, and the like. Chemical formula 6 used in a comparative example described later is not preferable because the number of carbon atoms of the linear saturated hydrocarbon is less than 11.

  Specific examples of the basic organic compound represented by the chemical formula 2 in the present invention include the following chemical formula 7, chemical formula 8, chemical formula 9, and the like. Chemical formula 10 used in a comparative example described later is not preferable because the number of carbon atoms of the linear saturated hydrocarbon is less than 11.

  The polyolefin resin layer to which the antistatic agent is added may be all polyolefin resin layers or only a part of them. As a method of making a polyolefin resin layer into a laminate of a plurality of layers, lamination by a coextrusion method cannot form a clear interface between the layers, and thus it can be efficiently produced. In particular, if the antistatic agent is added only to the intermediate layer in a three-layer structure, problems such as a decrease in adhesion strength due to bleeding of the additive component and peeling hardly occur, which is desirable.

  The semipolar organic compound and the basic organic compound used as an antistatic agent in the present invention do not exhibit an effect when they are added alone. Both must be present in a paired state. The semipolar organic compound and the basic organic compound exhibit the maximum effect when the same number exists. However, in practice, it is almost impossible to make the number completely the same, and if the ratio of the addition amount is in the range of 2: 1 to 1: 2, the effect can be practically expressed.

  The appropriate amount of the antistatic agent added is preferably in the range of 0.1 to 5.0 parts by weight with respect to 100 parts by weight of the polyolefin resin. When the addition amount is less than 0.1 parts by weight, the antistatic effect cannot be expected. When the addition amount is 5.0 parts by weight or more, the improvement effect of the antistatic effect cannot be obtained even if the addition amount is increased, and the transparency This is not preferable because it causes a decrease in temperature, a bleed out with time, and an influence on the mechanical properties of the polyolefin resin.

  The thickness of the surface protective layer 4 in the present invention is desirably as thin as possible in order to efficiently exhibit the antistatic function, but scratch resistance, weather resistance, abrasion resistance, etc., which are the effects of the surface protective layer, etc. In view of the provision of the above, it is desirable to provide a certain thickness or more. On the other hand, when the thickness exceeds a certain level, it becomes difficult to cause leakage of static electricity charged on the surface layer, and thus the antistatic effect is not sufficiently exhibited. Considering these balances, it is desirable that the thickness of the surface protective layer be in the range of 3 to 30 μm.

  The material of the surface protective layer 4 in the present invention is not limited, but a material obtained by crosslinking and curing a (meth) acrylate material with an isocyanate curing agent, or crosslinking and curing using ultraviolet irradiation, electron beam irradiation, or the like. If used, the hard and tough surface protective layer 4 is obtained, which is preferable. As the (meth) acrylate-based material, for example, when it is desired to impart appropriate flexibility and improve handling properties, a urethane (meth) acrylate material or the like is also preferably used. For example, in the case of crosslinking using an isocyanate curing agent, a hydroxyl group is added to the (meth) acrylate resin in order to react with isocyanate, and in the case of reaction using ultraviolet irradiation, a photopolymerization initiator is appropriately added. Is done. In the case of curing using an electron beam, a special additive is not necessarily required if it is a (meth) acrylate resin. However, in order to advance crosslinking more efficiently, it is preferable to add a crosslinking aid. Used. The molecular weight of the (meth) acrylate material is not particularly limited, and monomers, oligomers, prepolymers and the like can be arbitrarily selected. It is also possible to use a mixture of a plurality of these.

  If an acrylic resin is used as a main raw material for the surface protective layer 4, it will have higher weather resistance than the original, but the addition of an ultraviolet absorber and a radical scavenger is suitably used for further performance. As organic UV absorbers, there are benzotriazoles, benzophenones, benzoates, hydroxyphenyltriazines, etc., as well as inorganic UV-blocking agents, organic UV Used as an additive that acts like an absorbent. As the radical scavenger, those having a specific structure among hindered phenols and hindered amines have an effect of detoxifying the growth of free radicals that are caused by photoexcitation and cause material deterioration. In particular, the hindered amine-based radical scavenger has the characteristics that the effect is large and the effect lasts for a long period of time. Therefore, by adding an appropriate amount, the weather resistance is not impaired without impairing the performance as the surface protective layer 4. Performance can be imparted. In addition, since an ultraviolet absorber has the characteristics in an absorption wavelength range etc. according to the structure, multiple types of combined use is also performed suitably and a synergistic effect can be anticipated sometimes. Similarly, radical scavengers are sometimes suitable for use in combination of a plurality of types.

  There is no restriction | limiting in the lamination | stacking method of the surface protection layer 4, For example, if the raw material is a liquid, what is necessary is just to laminate | stack using a well-known coating method. Further, the surface protective layer 4 may be formed in multiple layers for the purpose of imparting functionality or improving the surface state. Of course, the same material may be laminated in a plurality of times.

  In addition to the ultraviolet absorber and the radical scavenger described above, various additives are appropriately added to the surface protective layer 4 in order to impart further functionality. For example, antibacterial agents, antifouling agents, matting agents, antisettling agents, waxes, flame retardants, various pigments, various dyes, heat shields, organic fillers, inorganic fillers, and the like are preferably used. When isocyanate crosslinking is selected as the crosslinking method of the surface protective layer 4, addition of a curing agent is essential, and when ultraviolet crosslinking is selected, addition of a photopolymerization initiator is essential. In addition, although a well-known thing may be used for an isocyanate hardening | curing agent, it is desirable to select suitably from the thing of a non-yellowing type or a non-yellowing type considering the use use.

  Further, various inorganic materials are preferably added for the purpose of reinforcing the hardness of the surface protective layer 4. In particular, when hollow glass beads are added, resistance to scratches is improved to make the surface hard, and further, cushioning properties are exerted against pressing wounds to make the surface harder, making it difficult to be damaged. .

  The polyolefin-based decorative sheet having the antistatic function of the present invention obtained as described above is bonded to a wood material, asphalt, concrete, a metal material, an inorganic material, etc., and has high designability / durability / slip resistance. Etc., and a flooring material having an excellent antistatic function can be obtained. Since it has an excellent antistatic function, static electricity does not exist on the surface for a long period of time, and it is difficult for dust to collect at the joint of the flooring material, and the accumulated dust can be removed by simple cleaning. In addition, it is possible to prevent electrostatic discharge of charged static electricity particularly in winter when the humidity is low.

<Examples 1-7>
85 parts by weight of random polypropylene resin (Prime Polypro_S235WC: manufactured by Prime Polymer Co., Ltd.), 10 parts by weight of low density polyethylene resin (Novatech LD_LC600A: manufactured by Nippon Polyethylene Co., Ltd.), titanium oxide (CR-60: manufactured by Ishihara Sangyo Co., Ltd.) ) Was kneaded using an extruder at a ratio of 5 parts by weight, and film formation was performed at a thickness of 70 μm using a T-die film forming machine to prepare a substrate sheet 1.

An isocyanate curing agent was added to gravure ink (XS-756; manufactured by DIC Graphics Co., Ltd.), and a coating solution was prepared by adjusting the viscosity with a methyl ethyl ketone solvent. On one side of the base sheet 1 produced as described above, The pattern layer 2 was printed using a gravure printing method. On the other side of the base sheet 1, a gravure ink with a pigment component removed is prepared, and an appropriate amount of silica added is applied using a gravure coater to a coating amount of 1 g / m ² (dry). I painted it with my aim. Thereafter, curing was performed in an oven at 40 ° C. for 3 days.

An isocyanate curing agent is added to an anchor coating agent (Takelac_A3210: manufactured by Mitsui Chemicals, Inc.) on the side of the substrate sheet 1 after curing on which the pattern layer 2 is provided, and the solid content is reduced to 25% with an ethyl acetate solvent. After diluting to the extent that it is coated with the aim of a coating amount of 1 g / m ² (dry) using a bar coater, a polypropylene resin blended as shown in Table 1 below using a T-die type 3 layer co-extrusion laminator Was coextruded. After that, corona treatment is performed, and as the surface protective layer 4, a hexamethylene diisocyanate curing agent and methyl ethyl ketone as a diluent solvent are appropriately added to an acrylate coating agent (UC Clear_W480E: manufactured by DIC Graphics Co., Ltd.), and a bar coater is used. The coating amount was applied so that it was within the range of 6 ± 1 g / m ² (dry). Thereafter, curing was performed in an oven at 40 ° C. for 3 days. Thus, the polyolefin type decorative sheet having the antistatic function of Examples 1 to 7 was produced.

<Examples 8 to 13>
As shown in Table 2, Examples 8 to 13 were carried out in the same manner as in Example 1 except that the thickness of the surface protective layer 4 was changed by changing the number of the bar coater or increasing the number of times of repeated coating. A polyolefin-based decorative sheet having an antistatic function was prepared.

<Comparative Examples 1-2>
Instead of the formulation shown in Example 1 of Table 1, cosmetic sheets of Comparative Examples 1 and 2 were prepared by using the formulation shown in the Comparative Example of Table 3.

<Performance evaluation>
The decorative sheets of Examples and Comparative Examples thus prepared were bonded to a plywood substrate via an aqueous emulsion adhesive (Rikabond BA-10L: manufactured by Chuo Rika Kogyo Co., Ltd.) to prepare a decorative board. . The physical properties of the produced floor surface material were evaluated as follows, and the superiority or inferiority of the performance was confirmed.

<Surface resistance measurement>
About each decorative board using an Example and a comparative example, the surface resistance was measured in the environment of temperature 25 degreeC humidity 60% using the surface resistance meter (ST-4: manufactured by Simco Japan Co., Ltd.). .

<Measurement of electrostatic charge on the surface>
For each decorative board using Examples and Comparative Examples, a charge master system (electrostatic charging device comprising a DC high voltage generator ECM-20 (Lite) manufactured by Simco Japan Co., Ltd. and an HDR charging applicator) is forcibly used. The charged state was caused and the surface potential was measured over time using an electrostatic meter (FMX-003: manufactured by Simco Japan Co., Ltd.), and the time until the charged potential decreased from 10 kV to 5 kV was measured. . In addition, this measurement was performed in the state of the sheet | seat before bonding on a plywood base material.

<Adhesion of surface protective layer>
Each of the decorative panels of Examples and Comparative Examples, 25 ° C. (room temperature) × 192 hours, 60 ° C. × 192 hours heating, 80 ° C. × 192 hours heating, 80 ° C. 2 hours and −20 ° C. 2 hours, 100 cycles each After the exposure test was performed after being placed in the environment, a cellophane tape peel test was performed to confirm the peeled state of the surface protective layer. The results are shown in Table 4.

As is apparent from Table 4, it can be seen that the polyolefin-based decorative sheet having the antistatic function of the example of the present invention has a shorter time for the charging potential to be lowered than the decorative sheet of Comparative Example 1. This can be said to be an effect of the antistatic agent added to the polyolefin. Incidentally, the value of the surface resistance, which is an index indicating the ease of charging the surface, was high enough that no difference was found in all of the examples and comparative examples. This is because the antistatic agent is not added to the outermost layer in the polyolefin-based decorative sheet having the antistatic function as well as the comparative example. That is, it is considered that the polyolefin-based decorative sheet having the antistatic function of the example is charged immediately after being forcibly charged, but thereafter, the charged charge is leaked inside the sheet. The time during which the charging potential is lowered is considered to be an index indicating the rate at which the charged charge leaks inside. Moreover, from the comparison between the results of Example 3 and the results of Comparative Example 2, the adhesion of the top coat is greatly improved by the effect of using the basic organic compound represented by the structure of the present invention, in particular, Chemical Formula 7 . I understand that. This is presumably because the basic organic compound represented by Chemical Formula 7 of the present invention is difficult to bleed out due to entanglement with the polypropylene resin.

<Examples 14 to 17>
As shown in Table 5, polyolefin-type decorative sheets having antistatic functions of Examples 14 to 17 were prepared in the same manner as Example 1 except that antistatic agents B to E were added instead of the antistatic agent A. did.

<Comparative Examples 3-4>
In addition to adding antistatic agents F to G instead of antistatic agent A, the antistatic agent was added in the same manner as in Example 3, so that the decorative sheets of Comparative Examples 3 to 4 as shown in Table 6 were used. Was made.

<Performance evaluation>
About the decorative sheet of Examples 14-17 and Comparative Examples 3-4, the surface resistance measurement and the measurement of the amount of electrostatic charge of the surface were performed by the same method as the above. The results are shown in Table 7. In the decorative sheets of Comparative Example 3 and Comparative Example 4 having only linear saturated hydrocarbons having 10 or less carbon atoms, the adhesiveness of the surface protective layer is reduced. This is presumably because there was a problem in the compatibility between the antistatic agent and the polypropylene resin, and bleed out and segregated at the interface with the topcoat layer.
Thus, from Examples 1 to 13 and Examples 14 to 17, and Comparative Examples 1 and 2 and Comparative Examples 3 and 4, the structure of the present invention, particularly the semipolar organic compound represented by Chemical Formula 1 in the molecule It can be seen that the adhesion of the top coat is greatly improved by the effect of using an antistatic agent comprising a composition in which a basic organic compound represented by Chemical Formula 2 is mixed in the molecule. This is presumably because the semipolar organic compound and the basic organic compound of the present invention are difficult to bleed out due to the entanglement with the polypropylene resin.

  Since the polyolefin-based decorative sheet having an antistatic function of the present invention does not use any vinyl chloride, there is no concern about environmental problems. Furthermore, since an antistatic function is provided, it is possible to obtain effects such as being hard to get dust, easy to sweep off the attached dust, and not feeling uncomfortable due to static sparks.

DESCRIPTION OF SYMBOLS 1 ... Base material sheet 2 ... Pattern pattern layer 3 (31, 32) ... Polyolefin-type resin layer 4 ... Surface protective layer

Claims (5)

In a polyolefin-based decorative sheet having at least one polyolefin-based resin layer and a surface protective layer, at least one of the polyolefin-based resin layers includes one atomic group represented by the following chemical formula 1 in the molecule and carbon. It consists of a composition in which a semipolar organic compound having at least one linear saturated hydrocarbon of formulas 11 to 22 and a basic organic compound represented by any one of chemical formulas 7, 8, and 9 are mixed. the antistatic agent will be added, not by adding an antistatic agent prior Symbol surface protective layer,
The polyolefin-based resin layer to which the antistatic agent is added is made of a polypropylene resin having a heat of fusion measured by differential scanning calorimetric measurement of 70 to 170 J / g,
A polyolefin-based decorative sheet having an antistatic function , wherein the addition amount of the antistatic agent is 0.1 to 5.0 parts by weight with respect to 100 parts by weight of the polypropylene resin in the polyolefin-based resin layer. .



The polyolefin-based decorative sheet having an antistatic function according to claim 1 , wherein the surface protective layer has a thickness of 3 to 30 μm. Wherein the polyolefin resin layer is laminated by co-extrusion of two or more layers, a polyolefin resin layer at least one layer formed by adding the antistatic agent of which, according to claim 1 or 2 A polyolefin-based decorative sheet having an antistatic function as described in 1. 3. The polyolefin resin layer according to claim 1 or 2 , wherein the polyolefin resin layer is laminated by coextrusion of three layers, and an intermediate layer thereof is a polyolefin resin layer formed by adding the antistatic agent. Polyolefin-based decorative sheet having antistatic function. The charging according to any one of claims 1 to 4, wherein a ratio of each of the semipolar organic compound and the basic organic compound is within a range of 2: 1 to 1: 2. Polyolefin-based decorative sheet having a prevention function.