JPH11277694A - Decorative sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the weatherability of a decorative sheet without the design effect or mechanical characteristics thereof. SOLUTION: A decorative sheet contains at least one layer of a polyolefinic film comprising a compsn. prepared by adding 0.1-0.6 pts.wt. hindered amide type light stabilizer to 100 pts.wt. polyolefin resin and having a haze value of 20-50% and an internal haze value of 4.0% or less. For example, this layer is used as the coating film layer 3 of the decorative sheet fundamentally comprising a base material film layer 1, a printing layer 2 and the coating film layer 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a decorative sheet using a polyolefin film, and more particularly to a polyolefin decorative sheet excellent in weather resistance.

[0002]

2. Description of the Related Art Conventionally, decorative sheets have been used in a large number of members for housing interiors and the like, and these are formed of a polyvinyl chloride film for reasons of workability, weather resistance, stain resistance and the like.

[0003] However, since it is suspected that this polyvinyl chloride generates hydrogen chloride gas and dioxin when incinerated, a decorative sheet which has little effect on the environment when discarded has been desired. Therefore, the present inventors have already proposed a decorative sheet using a polyolefin-based film having little effect on the environment, in place of a conventional decorative sheet formed of a polyvinyl chloride film (Japanese Patent Application No. 9-82677). .

[0004] However, the decorative sheet has mechanical properties, secondary workability, etc., which are comparable to those of a conventional polyvinyl chloride decorative sheet, but there is still room for improvement in weather resistance. Was. Further, a method of improving the weather resistance by adding a weathering agent such as an ultraviolet absorber or a light stabilizer to the film is known.However, when this method is used, the weather resistance is reduced when the amount of the weathering agent is small. Insufficient properties, and when the amount of the weathering agent added is large, there is a problem that the function as a decorative sheet is deteriorated, such as causing a decrease in physical properties of the film or bleeding out of the weathering agent on the film surface. I was

Further, as a method of improving weather resistance, a method of adding inorganic fine particles such as titanium oxide to suppress the transmittance of ultraviolet rays is also known, but using this method reduces the internal haze of the film. However, in the case of a decorative sheet, there is a problem that it is difficult to see through the color and the printed pattern of the base film, and the design property is deteriorated.

[0006]

Accordingly, there is a need for a decorative sheet having improved weather resistance without deteriorating the characteristics of the decorative sheet such as design.

[0007]

Means for Solving the Problems The present inventors have intensively studied to solve the above problems. As a result, the above-mentioned problem has been solved by using a polyolefin-based film composed of a polyolefin-based resin and a light stabilizer and having a haze value or the like in a specific range as a constituent layer of a decorative sheet.

That is, the present invention relates to a polyolefin resin 10
0 parts by weight, 0.1 to 0.6 parts by weight of a light stabilizer, and has a haze value of 25% to 50% and an internal haze value of 4.0.
% Or less as a constituent layer.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As the polyolefin resin used in the present invention, known polyolefins can be used without limitation. To be more specific, propylene homopolymer, ethylene-propylene copolymer, ethylene-propylene-butene copolymer, polypropylene-based polymer such as propylene-α-olefin copolymer, high-density polyethylene, low-density polyethylene, Linear low density polyethylene, ethylene-
Examples include polyethylene-based polymers such as α-olefin copolymers, butene homopolymers, and polybutene-based polymers such as butene-α-olefin copolymers, and the polymers are modified with maleic anhydride or the like. May be. Examples of the α-olefin include 1-butene, 1-pentene, 1-hexene, 1-heptene, and 4-methyl-1pentene. These polymers may be used as a mixture of two or more.

The melt flow rate (hereinafter referred to as MFR) of the polyolefin resin is 0.1 to 30 g / 10 minutes (230 ° C.), more preferably 0.5 to 15 g / 10, in consideration of film forming properties. It is preferably in the range of minutes (230 ° C.).

Light stabilizers used in the present invention include ultraviolet absorbers such as benzotriazole, benzophenone, cyanoacrylate and salicylate, light stabilizers such as hindered amine, and inorganic ultraviolet such as titanium and ceramics. Known materials such as absorbents can be used without any limitation. Among them, hindered amine light stabilizers are preferred. To be more specific, screw (2, 2,
6,6-tetramethyl-4-piperidyl) sebacate,
Dimethyl succinate-1- (2-hydroxyethyl) -4
-Hydroxy-2,2,6,6-tetramethylpiperidine polycondensate, 2- (3,5-di-t-butyl-4-hydroxybenzyl) -2-n-butylmalonate bis (1,2 , 2,6,6, -pentamethyl-4-piperidyl) and the like. Among them, considering the effect of improving weather resistance, etc., bis (2,2,6,6-tetramethyl-4-
Piperidyl) sebacate is particularly preferred.

In the present invention, the addition amount of the light stabilizer is 0.1 to 0.6 with respect to 100 parts by weight of the polyolefin resin in consideration of the effect of weather resistance and that the function as a decorative sheet is not reduced. Parts by weight, more preferably 0.1 to 0.5 parts by weight, even more preferably 0.2 to 0.5 parts by weight. If the addition amount of the light stabilizer is less than 0.1 part by weight, even if the haze value and the internal haze value of the polyolefin film are within the ranges specified in the present invention, the effect of improving the weather resistance is unfavorably small. On the other hand, when the amount of the light stabilizer is more than 0.6 parts by weight, the light stabilizer bleeds out to the surface of the polyolefin-based film, which is not preferable because the design of the decorative sheet is deteriorated.

The haze value of the polyolefin film in the present invention needs to be 20 to 50% in consideration of the amount of the light stabilizer added and the design properties as a decorative sheet, more preferably 22 to 38%. More preferably, 2
5 to 36%. If the haze value of the polyolefin-based film is lower than 20%, even if the amount of the light stabilizer is within the range specified in the present invention, the effect of improving the weather resistance is unfavorably reduced, and the transparency and gloss are also increased. Therefore, when a decorative sheet is formed using the polyolefin-based film, it is not preferable because a high-grade feeling and a design property are reduced.

On the other hand, if the haze value of the polyolefin film is higher than 50%, the transparency of the pattern of the decorative sheet, that is, the color of the base film or the transparency of the printed layer is deteriorated, and the design property is undesirably reduced. .

Further, the internal haze value of the polyolefin-based film in the present invention is considered as a decorative sheet, taking into consideration the function of seeing through a printed pattern of a base film and the like.
0% or less, and preferably 3.0% or less.
%, More preferably 2.0% or less. If the internal haze value of the polyolefin-based film is higher than 4.0%, it becomes difficult to see through a printed pattern or the like of the base film, and the design property is undesirably reduced.

In the present invention, the term "internal haze" refers to haze only in the inside of the film excluding the influence of light scattering due to unevenness on the surface of the film (ratio between diffuse transmittance and total light transmittance only in the inside of the film). It is.

The method for setting the haze value and the internal haze value in the ranges specified in the present invention includes, for example, a method of mixing incompatible polyolefin resins to lower the transparency, and a method of adding an inorganic substance to the polyolefin resin. A method of lowering the transparency, a method of mechanically lowering the surface smoothness using an embossing roll may be used, and among them, in consideration of controlling the haze value and the internal haze value, incompatible A method in which polyolefin resins are mixed with each other to reduce the transparency is preferable.

The above-mentioned incompatible polyolefin-based resin may be appropriately selected from the above-mentioned polyolefin-based resins. Among them, considering heat resistance, film-forming properties and the like,
It is preferable to use a polypropylene-based polymer and high-density polyethylene.

Specific examples of the above-mentioned polypropylene polymer include a propylene homopolymer having an mmmm pentad fraction of 0.80 to 0.97 by 13 C-NMR, and an ethylene-propylene polymer having an ethylene content of 0.5 to 15 mol%. Propylene random copolymer, ethylene-propylene-butene random copolymer having ethylene content and 1-butene content of 1 to 10 mol%, α-olefin having 4 to 8 carbon atoms, 1 to 1
A propylene-α-olefin random copolymer containing 0 mol% or a mixture of two or more of these polymers is exemplified.

The mixing ratio between the polypropylene polymer and the high-density polyethylene may be appropriately adjusted so as to obtain the haze value and the internal haze value specified in the present invention. For example, the mixing ratio of the high-density polyethylene is adjusted to 5 to 30%. do it. By setting the mixing ratio of the high-density polyethylene within the above range, the haze value and the internal haze value specified in the present invention can be easily obtained.

The thickness of the polyolefin film used in the present invention is not particularly limited. However, in consideration of the performance as a decorative sheet when processed into a decorative sheet, it is 20 to 20.
It is preferably 200 μm, more preferably 40 μm.
It is preferable that it is from μm to 150 μm. If the thickness of the film is less than 20 μm, the embossing cannot be performed when processing the film into a decorative sheet. On the other hand, if the thickness of the film is more than 200 μm, the processability when processing into a decorative sheet is undesirably reduced.

The polyolefin-based film may be a single-layer film or a multilayer film. However, when the haze value and the internal haze value are controlled within the ranges specified in the present invention, and the film properties and weather resistance are taken into consideration, the film is a multilayer film. Is preferred.

The layer structure of the multilayer film may be appropriately adjusted so that the haze value and the internal haze value fall within the ranges specified in the present invention. Among them, both outer layers contain the above-mentioned polypropylene polymer and high-density polyethylene. It is preferable that the film is a three-layer film in which a polyolefin-based film layer having a cloudy feeling and a polyolefin-based film layer formed of a polypropylene-based polymer in the middle layer.

In the case of the above three-layer film, in consideration of the weather resistance and the internal haze value, the outer layers preferably have a thickness of 2% to 15%, more preferably 5% to 10%, based on the total thickness of the film. %.

When both outer layers are thinner than 2%, it is difficult to control the haze value and the internal haze value of the polyolefin film within the ranges specified in the present invention, which is not preferable. On the other hand, if both outer layers are thicker than 15%, the haze value and the internal haze value are undesirably higher than the ranges specified in the present invention.

As a typical method for producing the above-mentioned polyolefin-based film, for example, a powder or a pellet comprising incompatible polyolefin-based resins and a light stabilizer is melt-extruded, and cooled and solidified on a cooling roll. A method of forming a film may be used.

In the case of a multilayer film, a co-extrusion method,
A known method such as an extrusion lamination method, a dry lamination method, or an in-line lamination method may be used. To specifically exemplify the case of the above-mentioned three-layer film, using a co-extrusion method, a polyolefin resin to which a light stabilizer is added to the middle layer, and a polyolefin resin incompatible with both outer layers and a light stabilizer. A method in which a resin powder or pellet is melt-extruded, cooled and solidified on a cooling roll to form a film.

The polyolefin-based film may be a non-stretched film or a uniaxially or biaxially stretched film. Considering the workability of the decorative sheet and the secondary workability of attaching the decorative sheet to a substrate such as plywood, the mechanical properties of the polyolefin-based film are such that the tensile modulus at 23 ° C. Direction (hereinafter referred to as MD direction) and a direction perpendicular to the film flow direction (hereinafter referred to as T).
It is preferable that the tensile elongation is 3 to 2000 MPa in both the MD and TD directions.
It is preferably 0 to 500%, and more preferably a film having no yield point in at least one direction.

In order to satisfy such mechanical properties, the polyolefin-based film is preferably biaxially stretched, and more preferably, the area stretching ratio is 1.
The draw ratio of the film in the flow direction and the direction perpendicular to the flow direction is 1.1 to 7 times, and the ratio of the draw ratio in the flow direction to the draw ratio in the direction perpendicular to the flow direction (flow direction draw ratio / Stretch ratio in the direction perpendicular to the flow direction) is 0.3 to
It is preferable that the film is biaxially stretched so as to be 3.
When the area stretching ratio is 1.1 times or less, since the polyolefin-based film constituting the decorative sheet in the present invention has a tensile yield point, when the decorative sheet is secondarily processed into a complicated shape, the decorative sheet is It is not preferable because it partially expands locally and impairs the design. Further, when the area magnification is 30 times or more, since the polyolefin-based film constituting the decorative sheet of the present invention has a large tensile stress, it is possible to sufficiently shape the decorative sheet when performing secondary processing into a complicated shape. It is not preferable because it cannot be done.

The structure of the decorative sheet of the present invention is not particularly limited as long as the structure contains the polyolefin film as a constituent layer.

In the present invention, any method may be used for forming a decorative sheet using the polyolefin-based film. For example, as shown in FIG. 1, after applying a printing layer 2 for printing a woodgrain or the like on a colored polyolefin-based film constituting the base film layer 1,
The substrate film layer 1 and the coating film layer 3 made of the polyolefin film of the present invention are bonded together by a method such as hot lamination or dry lamination with an adhesive, and the surface of the coating film layer 3 is embossed with a conduit. Further, a method of applying a surface protective layer 5 such as urethane on the surface may be used.

Considering the feature that the polyolefin-based film layer has a function of improving the weather resistance, the above-mentioned coated film layer 3 made of the polyolefin-based film is, as shown in FIG. Layer 2
Are preferred. In addition, the upper side mentioned here means the side opposite to the base material side when the decorative sheet is attached to the base material such as plywood.

As shown in FIG. 1, in the decorative sheet of the present invention, in addition to the above basic structure, other known structures are employed without any particular limitation. For example, a wiping coating 4 and a surface protection layer 5 can be provided. To illustrate a typical method of such wiping coating, for example, a coating film is bonded to the printing layer of a base film layer having a printing layer such as woodgrain on the surface thereof by hot lamination or dry lamination, and the like. There is a method in which a conduit is embossed on the surface, and a colored ink is inserted into the conduit portion and then wiped off. The surface protective layer is formed by coating a transparent member such as urethane or polyolefin by a known method.

The structure of the decorative sheet of the present invention does not have any problem even if it does not have the base film layer shown in FIG. In that case, there is no problem even if printing is performed on one side of the coating film layer.

The decorative sheet thus formed is used for known applications without any particular limitation. For example, plywood, steel plate, aluminum plate, particle board, MDF (medium fiber board), inorganic board (eg, gypsum board), concrete wall, resin board, foam, heat insulator, and hybrids and mixtures thereof It is pasted on a support such as the above via an adhesive to form a decorative plate. Examples of the method of sticking to the support include flat sticking, lapping, V-cut, and vacuum forming methods. For flat sticking, hand sticking, press sticking, roller sticking, sticking by roller press Matching etc. can be raised. In addition, there is no problem if it is attached to the base material by using any other method.

The application of the decorative plate is not particularly limited, and home appliances and furniture products such as TV cabinets, stereo speaker boxes, video cabinets, various storage furniture, unit furniture, doors, door frames, window frames, rims, Housing members such as baseboards, opening frames, etc., furniture members such as kitchens, storage furniture doors, etc.
It can be suitably used for applications such as flooring materials, ceiling materials, wallpaper and other building materials, automotive interior materials, home appliances, stationery, office supplies and the like.

[0037]

EXAMPLES The present invention will be described below with reference to examples and comparative examples, but the present invention is not limited to these examples. In the following Examples and Comparative Examples, the polypropylene resins used as film raw materials are as shown in Table 2.

The measuring methods used in the following Examples and Comparative Examples were implemented by the following methods.

(1) Pentad fraction (mmmm value) and copolymer composition Measured under the following conditions using JNM-GSX-270 (13C-nuclear resonance frequency 67.8 MHz) manufactured by JEOL Ltd.

Measurement mode: 1H-complete decoupling Pulse width: 7.0 microseconds (C45 degrees) Pulse repetition time: 3 seconds Integration frequency: 10,000 times Solvent: Mixed solvent of ortho-dichlorobenzene / deuterated benzene (90/10 Sample concentration: 120 mg / 2.5 ml Solvent Measurement temperature: 120 ° C. In this case, the mmmm pentad fraction is 13C-NMR.
It was determined by measuring the splitting peak in the methyl group region of the spectrum. Also, the assignment of the peak in the methyl group region is
A. Zambelli et al [Macromol
ecules 13, 267 (1980)].

(2) MFR Measured according to JIS K7210.

(3) Haze value Measured according to JIS K7105.

(4) Internal Haze Value In order to prevent scattering of light due to unevenness on the film surface, liquid paraffin was applied to both sides of the film so as to fill the unevenness, and the haze value was measured according to JIS K7105.

(5) Evaluation of weather resistance Using EYE SUPER UV TESTER (manufactured by Iwasaki Electric Co., Ltd., SUV-F1), UV irradiation was performed under the following conditions, and the tensile strength of the decorative sheet before and after irradiation was measured. The weather resistance was evaluated as in 1.

Irradiation intensity 80 mW / cm ² Layer temperature 85 ° C. Irradiation time 50 hr

[0046]

[Table 1]

(6) Tensile strength The sample was cut into strips having a width of 10 mm, and the measurement length was set to 40 mm.
And attached to a tensile tester at a tensile speed of 300 mm /
The strength at the time of tensile breaking in min was measured.

Example 1 To 100 parts by weight of resin A shown in Table 2, 0.3 parts by weight of bis (2,2,6,6-tetramethyl-4-piperidyl) separate as light stabilizer C was added and melted. The kneaded product was used as a middle layer component of the polypropylene film.

In 90 parts by weight of the resin B shown in Table 2, a density of 0.96 g / cm 3 and an MFR of 1.0 g / 10 min (1
(90 ° C.) 10 parts by weight of a high-density polyethylene D and 0.3 parts by weight of a light stabilizer C were added and melt-kneaded to obtain the components for both outer layers. This middle layer component and both outer layer components are 2
Melt extrusion at 260 ° C. using a seed three-layer T-die extruder,
Cool on a casting roll at 40 ° C, thickness 80μ
m of the coated polyolefin-based film was obtained. At this time,
The coated polyolefin film has a middle layer thickness of 64μ,
The thickness of each outer layer was 8 μm.

The haze value and internal haze value of the obtained coated polyolefin film were as shown in Table 3.

Further, 0.3 parts by weight of the light stabilizer C was added to 100 parts by weight of the resin A shown in Table 2, and the mixture was melt-extruded at 260 ° C. using a T-die extruder, cooled on a casting roll at 40 ° C. A base polyolefin-based film having a thickness of 80 μm was obtained. A wood grain pattern was printed on the surface of the base polyolefin film to obtain a base film.

A coated polyolefin film was dry-laminated on one side of the base polyolefin film using an acrylic adhesive to form a decorative sheet.

The resulting decorative sheet was adhered to a substrate with the coated polyolefin-based film facing the surface, and the tensile strength before and after the irradiation of ultraviolet rays was measured, and the weather resistance was evaluated as shown in Table 1. In addition, the surface state of the decorative sheet after irradiation with ultraviolet rays was also evaluated. Table 3 shows the results.

Example 2 A coated polyolefin film was obtained in the same manner as in Example 1 except that the amount of the light stabilizer C contained in the coated polyolefin film shown in Example 1 was changed to 0.6 parts by weight. . The haze value and internal haze value of the obtained coated polyolefin film were measured and are shown in Table 3. Further, in the same manner as in Example 1, a decorative sheet was obtained using the obtained coated polyolefin-based film.

The obtained decorative sheet was evaluated for weather resistance in the same manner as in Example 1, and the results are shown in Table 3.

Example 3 The components constituting the middle layer and both components constituting the outer layer of the coated polyolefin-based film shown in Example 1 were melt-extruded at 260 ° C. using a two-type and three-layer T-die extruder, and cast on a 40 ° C. casting roll. To obtain a 1200 μm thick casting sheet. After the sheet was preheated by a heating roll at 135 ° C., it was stretched 3.0 times in the MD direction. Then 14
After stretching 5.0 times in the TD direction in a transverse stretching machine heated to 5 ° C, the film was relaxed 5% in the transverse direction at 150 ° C in a heat setting zone to obtain a coated polyolefin-based film. The thickness of the resulting coated polyolefin-based film was 80 μm, of which the middle layer was 64 μm and both outer layers were 8 μm each.
Met. The haze value and internal haze value of the obtained coated polyolefin film were measured and are shown in Table 3.

Further, in the same manner as in Example 1, a decorative sheet was prepared using the obtained coated polyolefin-based film.

The obtained decorative sheet was evaluated for weather resistance in the same manner as in Example 1, and the results are shown in Table 3.

Example 4 The amount of high-density polyethylene D contained in both outer layer components of the coated polyolefin-based film shown in Example 3 was 30
Except for using parts by weight, a coated polyolefin-based film was obtained in the same manner as in Example 3. The thickness of the obtained coated polyolefin-based film was 80 μm, and the breakdown was 64 μm for the intermediate layer and 8 μm for both outer layers. The haze value and internal haze value of the obtained coated polyolefin film were measured and are shown in Table 3. Further, in the same manner as in Example 1, a decorative sheet was obtained using the obtained coated polyolefin-based film.

The obtained decorative sheet was evaluated for weather resistance in the same manner as in Example 1, and the results are shown in Table 3.

Example 5 A coated polyolefin film was obtained in the same manner as in Example 3 except that the layer structure of the coated polyolefin film shown in Example 4 was changed to 76 μm for the intermediate layer and 2 μm for both outer layers. A film was obtained. The haze value and internal haze value of the obtained coated polyolefin film were measured and are shown in Table 3. Further, in the same manner as in Example 1, a decorative sheet was obtained using the obtained coated polyolefin-based film.

The obtained decorative sheet was evaluated for weather resistance in the same manner as in Example 1, and the results are shown in Table 3.

Comparative Example 1 A coated polyolefin film was obtained in the same manner as in Example 1 except that the amount of the light stabilizer C contained in the coated polyolefin film shown in Example 1 was changed to 0.05 part by weight. Was.

The haze value and internal haze value of the resulting coated polyolefin film were measured and are shown in Table 3. Further, in the same manner as in Example 1, a decorative sheet was obtained using the obtained coated polyolefin-based film.

The obtained decorative sheet was evaluated for weather resistance in the same manner as in Example 1, and the results are shown in Table 3.

Comparative Example 2 A coated polyolefin film was obtained in the same manner as in Example 3, except that the amount of the light stabilizer C contained in the coated polyolefin film shown in Example 3 was changed to 1.2 parts by weight. Was.

The haze value and internal haze value of the resulting coated polyolefin film were measured and are shown in Table 3. Further, in the same manner as in Example 1, a decorative sheet was obtained using the obtained coated polyolefin-based film.

The obtained decorative sheet was evaluated for weather resistance in the same manner as in Example 1, and the results are shown in Table 3.

Comparative Example 3 A coated polyolefin film was prepared in the same manner as in Example 5 except that the amount of the high-density polyethylene D contained in both outer layer components of the coated polyolefin film shown in Example 5 was changed to 50 parts by weight. I got

The haze value and internal haze value of the resulting coated polyolefin film were measured and are shown in Table 3. Further, in the same manner as in Example 1, a decorative sheet was obtained using the obtained coated polyolefin-based film.

The obtained decorative sheet was evaluated for weather resistance in the same manner as in Example 1, and the results are shown in Table 3.

Comparative Example 4 A coated polyolefin-based film was prepared in the same manner as in Example 1 except that the amount of the high-density polyethylene D contained in both outer layer components of the coated polyolefin-based film shown in Example 1 was changed to 2 parts by weight. A film was obtained.

The haze value and internal haze value of the obtained coated polyolefin film were measured and are shown in Table 3. Further, in the same manner as in Example 1, a decorative sheet was obtained using the obtained coated polyolefin-based film.

The obtained decorative sheet was evaluated for weather resistance in the same manner as in Example 1, and the results are shown in Table 3.

[0075]

[Table 2]

[0076]

[Table 3]

[0077]

The present invention provides a decorative sheet comprising a polyolefin film in which a light stabilizer is added in a specific amount and a haze value and an internal haze value are controlled to be in specific ranges. A polyolefin-based decorative sheet having good weather resistance can be obtained without deteriorating the design and mechanical properties of the decorative sheet.

The reason why the above-mentioned weather resistance effect appears is not clear, but is presumed to be due to a synergistic effect between the light blocking effect and the light stabilizer by controlling the haze value and the internal haze value.

Further, by controlling the haze value and the internal haze value so as to be in specific ranges, a matte tone can be obtained, and a high-grade feeling can be given to the decorative sheet.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a typical embodiment of a decorative sheet of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base film 2 Printing layer 3 Coating film 4 Wiping coating 5 Surface protective layer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI C09K 15/30 C09K 15/30

Claims (3)

[Claims] 1. A polyolefin resin comprising 100 parts by weight of a polyolefin resin, 0.1 to 0.6 parts by weight of a light stabilizer and having a haze value of 20 to 50% and an internal haze value of 4.0% or less. A decorative sheet containing a film as a constituent layer. 2. The decorative sheet according to claim 1, wherein the light stabilizer is a hindered amine light stabilizer. 3. A decorative sheet, characterized in that the decorative sheet comprises at least a base film layer and a coating film layer, and the coating film layer is the polyolefin-based film according to claim 1.