JPH05212832A - Mark display member - Google Patents

Abstract

PURPOSE:To enhance tear strength and lightweight properties by laminating a support composed of an extruded resin foam sheet to the opposite side surface of double layered synthetic paper consisting of a base material layer composed of a biaxially stretched thermoplastic resin film and a paper like layer composed of a uniaxially stretched thermoplastic resin film containing an inorg. fine powder. CONSTITUTION:A support A with a thickness of 50mum or more composed of an extruded resin foam sheet with foaming magnification of 1.05-10 times is provided. Double-layered synthetic paper with a thickness of 50-500mum consisting of a base material layer B<1> composed of a biaxially stretched thermoplastic resin film having pores and a paper like layer B<2> composed of a uniaxially stretched thermoplastic resin film containing 0.1-65wt.% of an inorg. fine powder is integrally laminated on the single surface of the support A so that the paper like layer B<2> forms the surface to obtain a laminate with a thickness of 100-5000mum. Data to be transmitted is printed or written on the surface of the paper like layer B<2>.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to characters, figures, symbols, etc., which are installed at sites of civil engineering construction and road construction for danger indication, or at indoor and outdoor locations such as in stores or in stores for advertising. The present invention relates to a sheet-shaped marker display that displays characters, figures, symbols, etc., which are excellent in tear strength and lightness.

[0002]

2. Description of the Related Art Conventionally, sheet-like sign display bodies displaying characters, figures, symbols, etc., which are installed at indoor and outdoor locations such as sites of civil engineering and road construction and stores, are vinyl chloride Resin-coated salt white sheet or inorganic fine powder 25 ~
A polyolefin resin unstretched extruded sheet containing 45% by weight or a biaxially stretched microporous film of a thermoplastic resin as a base material layer, and a uniaxially stretched thermoplastic resin film containing inorganic fine powder on the surface of the base material layer. A multi-layer synthetic paper having a paper-like layer (Japanese Patent Application No. 3-159579) is used. As shown in FIG. 2, the vinyl chloride resin lami-white sheet, the inorganic fine powder-containing polyolefin resin unstretched extruded sheet, and the sign display formed from the multilayer synthetic paper are as shown in FIG.
It is used after being perforated and hung with a wire or the like, or as shown in FIG. 3, it is fixed to a wood plywood or the like with nails, thumbtack fasteners, or the like.

[0003]

However, in the marking indicator formed from such a vinyl chloride resin lami-white sheet, the density of the vinyl chloride resin itself constituting the marking indicator is 1.35 g / cm ³ . Because of the large size, the weight per sheet becomes heavy, and it becomes difficult to collectively transport a large number of marker display bodies during the transporting work, and it is necessary to transport the cells in a divided manner many times. Also, in the incineration process after use due to damage or the like, toxic gas, black smoke and irritating odor are generated at the time of combustion, which is not preferable for the environment. In addition, the inorganic fine powder-containing polyolefin resin unstretched extruded sheet is blended with the inorganic fine powder for the purpose of reducing the calorific value at the time of incineration, whereby the density of the sheet is 1.2 to 1.3 g /
It is not preferable because it increases to cm ³ and also becomes heavy during transfer work.

Further, a biaxially stretched microporous film of a thermoplastic resin, which has been improved in printability, lightness, environmental pollution due to incineration, is used as a base material layer, and a heat containing inorganic fine powder on the surface of the base material layer. Multi-layer synthetic paper with a uniaxially stretched film of a plastic resin as a paper-like layer (Japanese Patent Publication Nos. 46-40794 and 50-
29738, Japanese Patent Publication No. 50-28114, Japanese Patent Publication No. 53
-6676, JP-B-52-30390, JP-A-54
-74842, JP-A-56-21830 and JP-A-5-
6-118437, JP-A-56-141339, JP-A-57-149363, JP-A-57-181829.
The sign display formed from a biaxially stretched film has a high mechanical strength because it is used as a base material layer, and the paper-like layer and the base material layer are finely divided mainly by the inorganic fine powder by stretching. It has a large number of voids, is light in weight, and has a crack on the surface of the paper-like layer, so that it is excellent in printability and writability. However, in the marker display formed from this multi-layer synthetic paper, the thermoplastic resin film constituting the multi-layer synthetic paper has a highly crystalline orientation [stretching ratio: length × width = (4 to 8)
X (5 to 12)], the sign display body itself is stopped by a wire, a nail, a thumbtack, etc., and when the sign is shaken by a strong wind or a person pulls the sign display body with a hand or the like. In addition, the tensile stress is due to the orientation direction of the synthetic paper (stretching direction).
Often, the multi-layered synthetic paper will be torn when it coincides with and cannot be reused.

[0005]

[Means for Solving the Problems]

[Summary of the Invention] As a result of intensive studies conducted by the present inventors in view of the above problems, a biaxially stretched thermoplastic film having microporosity was used as a base material layer (B ¹ ), and an inorganic fine powder was used as an inorganic fine powder. 1-6
The paper-like layer of a multi-layer synthetic paper (B), which comprises a uniaxially stretched film of a thermoplastic resin contained in a proportion of 5% by weight as a paper-like layer (B ² ).
By attaching a support (A) made of an extruded resin foam sheet having a wall thickness of 250 μm or more and an expansion ratio of 1.05 to 10 times to the surface opposite to (B ² ), tear strength and light weight are improved. The present invention has been completed based on the finding that an excellent labeled display material can be obtained. That is, the sign display of the present invention is a support having a wall thickness of 50 μm or more made of an extruded resin foam sheet having an expansion ratio of 1.05 to 10 times.
A biaxially stretched thermoplastic film having microporosity is used as a base material layer (B ¹ ) on at least one surface of (A), and an inorganic fine powder is used as a base material.
A uniaxially stretched film of a thermoplastic resin contained in a proportion of 1 to 65% by weight is used as a paper-like layer (B ² ) and has a wall thickness of 50 to 500 μm.
The multi-layered synthetic paper (B) having a thickness of 100 to 5,000 is integrally laminated so that the paper-like layer (B ² ) forms a surface.
The laminated body has a thickness of μm, and is characterized in that information to be transmitted is printed or written on the surface of the paper-like layer (B ² ).

[Detailed Description of the Invention] [I] Marked Display As shown in FIG. 1, the labeled display 1 of the present invention comprises a support (A) made of an extruded resin foam sheet, and at least one surface thereof is microporous. Base layer of biaxially stretched thermoplastic film having 4
(B ¹ ) and a uniaxially stretched thermoplastic resin containing an inorganic fine powder on a surface of a laminated body 2 obtained by bonding a multi-layer synthetic paper (B) consisting of a paper-like layer (B ² ). Basically, the information 3 to be transmitted is displayed by printing or writing.

[II] Structure of Laminated Body (1) Layer Structure (a) Support (A) The extruded resin foam sheet used as the support (A) which constitutes the marker display 1 of the present invention is a thermoplastic resin. Are obtained by extrusion foam molding a resin composition containing a known chemical foaming agent or physical foaming agent. Materials The thermoplastic resin used for the foamed sheet is an olefin resin such as low-density, medium-density or high-density polyethylene, polypropylene, ethylene / propylene copolymer, ethylene or propylene / other α-olefin copolymer. , Polystyrene, acrylonitrile / styrene copolymer, styrene resin such as acrylonitrile / butadiene / styrene resin, polyethylene terephthalate, polyamide and the like. Examples of the chemical foaming agent used for the foam sheet include azodicarbonamide, azobisisobutyronitrile, diazoaminobenzene, N,
N'-dinitrosopentamethylenetetramine, N, N '
-Dimethyl-N, N'-dinitroterephthalamide, benzenesulfonyl hydrazide, p-toluenestyrenesulfonyl hydrazide, p, p'-oxybisbenzenesulfonyl hydrazide, sodium bicarbonate, sodium citrate and the like can be mentioned. Examples of the physical foaming agent include propane, butane, pentane, dichlorodifluoromethane, dichloromonofluoromethane, trichloromonofluoromethane and the like. Also,
These foaming agents may be used in combination with a foaming aid, a cross-linking agent and a nucleating agent that are commonly used, and the foam may be cross-linked.

Foaming The extruded resin foam sheet of the support (A) has a foaming ratio of 1.05 to 10 times, preferably 1.05 to 5 times. Suitably, the minor axis of the bubble diameter is 10 to 300 μ
m, preferably 10-200 μm, major axis 30-500
The closed cell ratio having the closed fine cells of μm, preferably 30 to 300 μm is 20% or more, preferably 65.
~ 100% extruded resin foam sheet. When the expansion ratio is lower than 1.05 times, the weight saving is not sufficiently satisfied. On the other hand, when the expansion ratio exceeds 10 times, the strength of the foam sheet becomes insufficient, the holding force of the pushpin 6 is weak, and the pushpin 6 that has stopped the marker display 1 comes off with the passage of time or the marker display 1 is removed. Wire 7 moored
When the composite synthetic paper (B) is torn by an external force such as a strong wind, the foam sheet in contact with is weak in pit tearing force, and the force against this is not sufficient and the marker support 1 is torn.

Thickness The thickness of the extruded resin foam sheet that is the support (A) is 50 μm.
m or more, particularly 250 to 3,000 μm, preferably 30 when the marker support 1 is used as a thumbtack 6 on a wooden frame 8 or the like.
0 to 600 μm, 25 when moored with wire 7
0 to 4,900 μm, preferably 300 to 3,000 μm
m is used.

(B) Multi-layered synthetic paper (B) Layer structure (structure) Multi-layered synthetic paper attached to the foamed sheet of the above-mentioned support (A)
(B) is a biaxially stretched thermoplastic resin film having micropores 4 as a base material layer (B ¹ ), and contains inorganic fine powder 4a in a proportion of 0.1 to 65% by weight on one side or both sides thereof. A uniaxially stretched film of a thermoplastic resin is laminated as a paper-like layer (B ² ). The multilayered synthetic paper (B) is thus the base layer (B ¹⁾ to the paper-like layer be (B ²⁾ those of the laminated two-layer structure, also, the base material layer (B ¹⁾ Even if it has a three-layer structure (Patent Publication No. 46-40794) in which ^two paper-like layers (B2) and (B2 ^' ) of a thermoplastic resin uniaxially stretched film are laminated on the front and back sides of Jo layer ^{(B 2), (B 2} ') and the base layer (B ¹⁾ and synthetic paper having a three-layer-seventh layer of other resin film layer (B ³⁾ present between the (Japanese 50-29738 No. 57-149
No. 363, Japanese Patent Publication No. 56-126155, Japanese Patent Publication No. 57-
No. 181829), or the back surface is a base material layer of propylene / ethylene copolymer, ethylene / (meth) acrylic acid copolymer metal salt (Na, Li, Zn, K), chlorinated polyethylene, or the like. It may be a synthetic paper having three or more layers to which a heat seal layer formed of a resin having a melting point lower than that of the resin constituting (B ¹ ) is attached. Such multi-layer synthetic paper
(B) is the aforementioned Japanese Examined Patent Publication No. 46-40794 and Japanese Unexamined Patent Publication No.
No. 149363, JP-A No. 57-181829, and the like are known, and specifically,
At Oji Yuka Synthetic Paper Co., Ltd., "Yupo FPG, KPK, SG
It is already sold under the product name of "G".

Substrate layer (B ¹ ): Biaxial stretching heat having micropores
Plastic film As the base material layer (B ¹ ) used in the multilayer synthetic paper (B) of the marker display 1 of the present invention, as shown in FIG. 1, the inorganic fine powder 4a is 5 to 45% by weight, preferably A thermoplastic resin film containing 10 to 30 wt% is 3.5 to 10 times in the longitudinal direction at a temperature lower than the melting point of the resin, preferably 4 to 7
It is a stretched resin film having a large number of fine rugby ball-shaped pores (voids) 4 inside the film obtained by stretching it in the transverse direction 3.5 to 20 times, preferably 4 to 12 times.

Paper-like layer (B ² ) and paper-like layer (B ^{2 '} ): Uniaxial stretching
Resin film Paper-like layer (B ² ) and paper-like layer laminated on the base material layer (B ¹ )
(B ^{2 '),} the base layer from 0.5 to 65 wt% of an inorganic fine powder 4a on one side or both sides of (B ^1), preferably 8 to 55 wt%
A uniaxially stretched film obtained by stretching the contained thermoplastic resin film in the machine direction 3.5 to 20 times, preferably 4 to 12 times at a temperature lower than the melting point of the resin, and having an inorganic fine powder content of 5% by weight. In the above cases, the uniaxially stretched resin microporous film has a large number of fine elongated pores (voids) 4 inside the film, and has cracks on the film surface, and is excellent in printability and writability. Is. The length of the pores 4 is approximately the particle size of the inorganic fine powder 4a × the draw ratio.

Void Multilayer synthetic paper used in the marker display 1 of the present invention
The porosity of (B) is 10 to 60 calculated by the following formula.
%, Preferably 15 to 50%, is lightweight (density 0.68 to 1.1 g / cm ³ ), easy to insert a strong pushpin 6 and easy to punch. It becomes synthetic paper. ρ ₀ : Density of film before stretching ρ: Density of film after stretching

[0014] The Material thermoplastic resin The thermoplastic resin, a propylene homopolymer,
Propylene resin such as propylene / ethylene copolymer, propylene / ethylene / butene-1 copolymer, propylene / butene-1 copolymer, propylene / 4-methylpentene-1 copolymer, linear low density polyethylene, High density polyethylene, ethylene-propylene copolymer, ethylene-butene-1 copolymer, ethylene-4-methylpentene-1 copolymer and other ethylene resins, polyethylene terephthalate, nylon-6, nylon-6,6, Polyamide resin such as nylon-6,10, nylon-6,12,
Examples thereof include polystyrene. Inorganic fine powder As the inorganic fine powder 4a, heavy calcium carbonate,
Examples thereof include calcined clay, palm curite, titanium oxide, barium oxide, silica stone, talc, mica, diatomaceous earth, and the like, and these inorganic fine powders 4a generally have a particle size of 0.0.
Those having a thickness of 3 to 15 μm, preferably 0.1 to 5 μm are used.

Thickness The thickness of the base material layer (B ¹ ) in the multilayer synthetic paper (B) is generally 20 to 500 μm, preferably 50 to 200 μm, and the paper-like layer (B ² ) and the paper-like layer The thickness of the layer (B ^{2 ′} ) is generally 0.5 to 100 μm, preferably 0.5 to 50 μm.
μm. The thickness of the whole multi-layer synthetic paper (B) is generally 50 to 500 μm, preferably 50 to 300 μm.
Is. Moreover, the thickness of the base material layer (B ¹ ) preferably occupies 40 to 99%, particularly preferably 50 to 80% of the total thickness of the multilayer synthetic paper (B). The thickness of the composite synthetic paper (B) of the above-mentioned indicator 1 varies depending on the purpose and application, but when the thickness of the foamed sheet of the support (A) is less than 50 μm, the unevenness of the foamed sheet becomes rough and the surface smoothness is reduced. When the multi-layer synthetic paper (B) has a wall thickness of less than 30 μm, the surface smoothness of the foamed sheet causes unevenness on the surface of the multi-layer synthetic paper (B) even after being heat-welded together. Since it remains, the surface appearance and printability may be impaired. Therefore, in order to obtain a good surface appearance, the thickness of the foam sheet of the support (A) is 50 μm or more, and the thickness of the multi-layer synthetic paper (B) is 50 μm.
It is preferable that the thickness of the laminated body 2 is not less than 100 m and is 100 μm or more.

(C) Adhesion In order to laminate the multi-layer synthetic paper (B) on the support (A), at least the support (A) is formed so that the paper-like layer (B ² ) forms a surface. It is integrated by sticking on one side. The laminate thus obtained has a wall thickness of 100 to
It is 5,000 μm, preferably 300 to 3,000 μm. Sticking method There are various sticking methods, but, for example, the following methods (1) to (4) are preferable. A resin composition comprising a resin for the support (A) and a foaming agent is melt-kneaded in an extruder, and the heat is utilized while the foamed sheet having fine closed cells extruded from a slit die is still in a molten state. Then, a thermal lamination method in which the multilayer synthetic paper (B) is pressure-welded to at least one surface of the foamed sheet from a metal roll or a rubber roll. There is a method of bonding the foamed sheet of the support (A) and the multilayer synthetic paper (B) with a hot melt adhesive or a solvent type adhesive. At this time, a known adhesive hot melt adhesive layer is provided on the upper layer of the foamed sheet of the support (A) by a coextrusion method, or
A multilayer synthetic paper (B) provided with a hot melt adhesive may be used.

Hot Melt Adhesives Hot melt adhesives include low density polyethylene, linear low density polyethylene, ethylene / vinyl acetate copolymer (preferably ethylene / vinyl acetate copolymer having a vinyl acetate content of 12% by weight or less). ), Ethylene / acrylic acid copolymer (preferably ethylene / acrylic acid copolymer having an ethylene content of 65 to 94% by weight), ethylene / methacrylic acid alkyl ester copolymer, ionomer (of ethylene / acrylic acid copolymer) Examples thereof include metal salts, metal salts of ethylene / methacrylic acid copolymers), ethylene / propylene copolymers, ethylene / propylene / butene-1 copolymers, and vinyl chloride / vinyl acetate copolymers.

Solvent Type Adhesive As the solvent type adhesive, polyether polyol,
Examples thereof include polyisocyanate adhesives and polyester / polyol / polyisocyanate adhesives.
The thickness of such an adhesive layer is generally 1 to 30 μm, preferably 1 to 20 μm. Specifically, the coating type adhesive is 1 to 20 g / m ² , preferably 2 to 6
It is applied in an amount of g / m ² . The hot melt type adhesive is melt extrusion laminated and has a thickness of 6 to 30 μm, preferably 8
It is heat-sealed to a thickness of ˜20 μm.

(2) Thickness of Laminated Body The thickness of the laminated body 2 constituting the marker support 1 is the same as that of the support (A).
Is the total thickness of the extruded resin foamed sheet and the multilayer synthetic paper (B), and is therefore 100 μm or more, in particular, the marker support 1 is used as a thumbtack 6 on a wooden frame 8 or the like. Sometimes 250-3,000 μm, preferably 300-600
μm, 250 to 4,9 when moored with wire 7.
Those having a diameter of 00 μm, preferably 300 to 3,000 μm are used.

[III] Information On the surface of the paper-like layer (B ² ), information 3 to be transmitted is printed by offset printing, gravure printing or the like, or is written with ink, paint, pencil, etc. Form body 1.

[0021]

EXAMPLES Examples and comparative examples of the present invention will be given below.
The present invention will be specifically described. [I] Evaluation The physical properties in the following Examples and Comparative Examples were evaluated by the methods described below. (1) Tear strength It was measured according to JIS-P8116 using an Elmendorf tear strength tester manufactured by Tozai Seiki Co., Ltd. (2) Taber stiffness It was measured according to JIS-8125 using a Taber type stiffener tester manufactured by Kumagai Riki Kogyo Co., Ltd. (3) Surface appearance The surface of the display sheet was visually inspected and judged according to the following criteria. ◯: No problem in practical use. Δ: There are some problems in practical use. X: Not practical (4) Thumbtack / Nail Suitability Each sheet for display was attached to a wooden plywood bulletin board by a thumbtack or nail and pulled downward with a hand, and the degree of tearing was judged by the way of tearing and the feel of the hand. ◯: No problem in practical use. Δ: There are some problems in practical use. X: Not practical

(5) Offset printing property Offset printing ink "TSP" manufactured by Toyo Ink Mfg. Co., Ltd.
-400 "(trade name) and an offset four-color printing machine manufactured by Komori Printing Co., Ltd., and four colors (black, blue, red, yellow) on the surface side.
Flat plate offset printing was performed, and the ink transferability and ink adhesion were evaluated by the following methods. Transferability of Ink The halftone dot portion of each color was magnified with a magnifying glass (30 times), and the halftone dot reproducibility was visually determined. Halftone dot reproducibility: 100 to 75% Good (○) 75 to 50% Slightly bad (△) 50 to 0% Bad (x) Ink adhesion Nichiban Co., Ltd. adhesive tape "Cellotape" (trade name)
Was strongly adhered to the printed surface and quickly peeled off along the printed surface, and the degree of ink detachment from the paper surface was visually judged. Ink residue rate: 100 to 95% Good (○) 95 to 80% Slightly bad (△) 80 to 0% Poor (x) (6) Pencil writing performance Characters are written with a HB pencil manufactured by Colin Co., Ltd. and visually judged. did. ◯: No problem in practical use. Δ: There are some problems in practical use. X: Not practical

(7) Expansion ratio The expansion ratio of the support foam sheet was calculated by the following calculation method. (8) Length of bubble diameter The support foam sheet was cut to a thickness of 20 μm in the cross-sectional direction with a microtome manufactured by Elma Co., Ltd., and its minor and major diameters were measured using a stereo microscope manufactured by Nikon Co., Ltd. (with scale). The length was measured.

[II] Experimental Example Example 1 Production of multi-layer synthetic paper (B) (1) 81 wt% of polypropylene (melting point about 164-167 ° C.) having a melt flow rate (MFR) of 0.8 g / 10 min. , High-density polyethylene 3% by weight and average particle size 1.5
The composition (A) in which 16% by weight of calcium carbonate (μm) was mixed was kneaded by an extruder set at a temperature of 270 ° C., extruded into a sheet, and further cooled by a cooling device to obtain an unstretched sheet. It was And this sheet 150
After being heated again to a temperature of ° C, it was stretched 5 times in the machine direction to obtain a 5 times machine-stretched film. (2) Polypropylene having a MFR of 0.4 g / 10 min (melting point: about 164-167 ° C.) 54% by weight, and an average particle size of 1.5 μ
The composition (B) mixed with m of calcium carbonate (46% by weight) was kneaded in another extruder, and then extruded into a sheet by a die, which was obtained in the step (1) above. After cooling the double longitudinally stretched film to a temperature of 60 ° C.,
It is heated again to a temperature of about 175 ° C., stretched 7.5 times in the transverse direction using a tenter, annealed at a temperature of 165 ° C., cooled to a temperature of 60 ° C., and the ears are slit. Three-layer structure (uniaxial stretching / biaxial stretching / uniaxial stretching) wall thickness 50 μm (B / A / B = 12 μm / 26 μm / 12μ
A multi-layer synthetic paper (B) consisting of the laminated film (m) with a porosity of 33% was obtained. Table 1 shows the physical properties of this multilayer synthetic paper.

Application of hot melt adhesive or solvent type adhesive
Cloth After corona discharge treatment on the surface of this three-layer laminated film,
0.05 g / m ² solid solution on both surfaces of coating solution
It was coated and dried so as to have a wall thickness of about 0.1 μm, and wound up. The composition of the coating agent aqueous solution was as follows. (a) Mitsubishi Yuka Co., Ltd. aqueous solution polyacrylic antistatic polymer "ST-1100"

[0026]

[Chemical 1]

100 g by weight (b) Epichlorohydrin adduct of water-soluble polyamine polyamide (Kymene 557 manufactured by Dick Hercules Co., Ltd.)
H ”): 25 parts by weight

Printing Multilayer synthetic paper coated with such an adhesive (wall thickness 50.1
.mu.m) on the surface of which the pattern shown in FIG.

Production of Foamed Sheet (A) Propylene / ethylene block copolymer (MFR 0.5
g / 10 minutes "Mitsubishi Polypro EC9") 100 parts by weight,
3.5 parts by weight of a 1: 1 mixture of monosodium citrate and sodium hydrogen carbonate was added as a chemical foaming agent, melt-kneaded with an extruder having a diameter of 65 mm, and then extruded at 210 ° C. through a slit die having a width of 750 mm to foam. Sheet (A) was obtained.

Manufacture of Marking Indicator While the foamed sheet (A) extruded from the slit die is still in a softened state, the multilayer synthetic paper (B) is thermally laminated to obtain a multilayer synthetic paper layer ( Wall thickness 5
0.1 μm) / Propylene / ethylene block copolymer foam layer (wall thickness: 250 μm, closed cell ratio: 82%, cell diameter: 120 to 200 μm in extrusion direction, 8 in perpendicular direction)
A labeled indicator having a physical property shown in Table 1 (thickness: 300.1 μm) having a foaming ratio of 0 to 130 μm and 1.5 times) was obtained.

Example 2 A multilayer synthetic paper (B) was thermally laminated on both front and back surfaces of the foamed sheet (A) obtained in “Production of foamed sheet (A)” in Example 1 to carry out multilayer synthesis. Paper (B) layer (wall thickness 50.
1 μm) / Propylene / ethylene block copolymer foam layer (wall thickness 250 μm, expansion ratio 1.5 times) / multi-layer synthetic paper (B) layer (wall thickness 50.1 μm) In the same manner as in Example 1, a labeled display having physical properties shown in Table 1 (thickness: 350.2 μm) was obtained.

Comparative Example 1 An example except that the multi-layered synthetic paper (B) obtained by "Production of multi-layered synthetic paper (B)" of Example 1 was used as a sign display (wall thickness 50.1 μm). The same procedure as in 1 was performed. The results are shown in Table 2.

Comparative Example 2 Example 1 was repeated except that the "multi-layer synthetic paper (B)" used in Example 1 was replaced with "Yupo FPG100" (perforation rate 38%) manufactured by Oji Yuka Synthetic Paper Co., Ltd. It carried out similarly to. The results are shown in Table 2.
Shown in.

Comparative Example 3 A multilayer synthetic paper (B) layer (wall thickness 50.1 μm) / propylene was prepared in the same manner as in Example 1 except that the thickness of the propylene / ethylene block copolymer foam layer was 40 μm. -Ethylene block copolymer foam layer (wall thickness 40 μm, foaming ratio 1.5 times) labeled with physical properties shown in Table 2 (wall thickness 90.
1 μm) was obtained.

Example 3 Multilayer synthetic paper (B) layer (wall thickness 50.1 μm) / in the same manner as in Example 2 except that the thickness of the propylene / ethylene block copolymer foam sheet layer was 400 μm. Propylene / ethylene block copolymer foam layer (wall thickness 400μ
m, foaming ratio 1.5 times) / multi-layer synthetic paper (B) layer (thickness 5
0.1 μm) with the physical properties shown in Table 1 (marked with a thickness of 50
0.2 μm) was obtained.

Comparative Example 4 A propylene / ethylene block copolymer foam sheet layer having the physical properties shown in Table 1 (having a wall thickness of 500 μm and an expansion ratio of 1.
After producing 5 times the closed cell ratio (86%), the surface was subjected to corona discharge treatment, and the aqueous coating solution used in Example 1 was applied to both surfaces so that the solid content was 0.05 g / m ² on one side and dried. Then, flat plate offset printing was carried out to obtain a marker display having the physical properties shown in Table 2.

Comparative Example 5 Propylene / ethylene block copolymer (MFR 1.
8 g / 10 min "Mitsubishi Polypro BC8") 100 parts by weight was mixed with 100 parts by weight of talc as an inorganic filler and melt-kneaded at a temperature of 230 ° C with an extruder having a diameter of 90 mm, and then 220 from a slit die having a width of 750 mm. After extruding at a temperature of ℃, to produce an unfoamed inorganic fine powder-containing resin sheet (wall thickness 500 μm) shown in Table 1, the surface was subjected to corona discharge treatment, and then the coating solution used in Example 1 was applied to both front and back surfaces. It was applied and dried so that the solid content would be 0.05 g / m ² on one side, and the pattern shown in FIG. 2 was subjected to flat plate offset printing on the surface to obtain a marker display having the physical properties shown in Table 2.

Comparative Example 6 Production of Multi-layer Synthetic Paper (B) (1) Polypropylene having an MFR of 0.8 g / 10 min was mixed with 12% by weight of calcium carbonate having an average particle size of 1.5 μm (based on the total weight of polypropylene). After mixing and kneading with an extruder set at a temperature of 270 ° C., the mixture was extruded into a sheet and cooled by a cooling device to obtain an unstretched sheet. Then, this sheet was heated again to a temperature of 140 ° C., and then stretched 5 times in the longitudinal direction to obtain a sheet stretched 5 times in the longitudinal direction.

(2) Mixing 49% by weight of polypropylene having an MFR of 4.0 g / 10 min, 5% by weight of maleic acid (modified monomer) -modified polypropylene and 46% by weight of calcium carbonate having an average particle size of 1.5 μm. 270 parts of Composition A prepared above (0.05 parts by weight of the modified monomer per 100 parts by weight of the filler).
What was melt-kneaded by the extruder set to the temperature of ℃,
Composition (B) obtained by mixing 55% by weight of polypropylene having an MFR of 4.0 and 45% by weight of calcium carbonate having an average particle size of 1.5 μm by melt kneading with another extruder set at a temperature of 270 ° C. Were laminated in a die and coextruded on both sides of the longitudinally stretched 5 times sheet obtained in (1) so that the layer containing the modified polypropylene was on the outside. Then, after heating the five-layer laminate to a temperature of 155 ° C.,
It was stretched 7.5 times in the transverse direction to obtain a five-layer laminated film.

(3) After the surface of this five-layer laminated film was subjected to corona discharge treatment, an aqueous solution of the coating agent was applied on both the front and back sides so that the solid content was 0.05 g / m ² on one side, dried, and wound up. .. The composition of the coating agent aqueous solution was as follows. (a) Mitsubishi Yuka Co., Ltd. aqueous solution polyacrylic antistatic polymer "ST-1100"

[0041]

[Chemical 2]

(Including in the molecular chain): 100 parts by weight (b) Epichlorohydrin adduct of water-soluble polyamine polyamide (Kaymen 557 manufactured by Dick Hercules)
H ”): 25 parts by weight The thickness of the film thus obtained is about 250 μm.
It was m.

(4) This five-layer laminated film (wall thickness 250 μ
m) was coated with a polyether / polyol / polyisocyanate adhesive at a rate of 1 g / m ^2, and the ^two 5-layer laminated films were laminated by a dry lamination method to produce a composite sheet with a thickness of 501 μm. .. Flat-plate offset printing was performed on the surface of the 10-layer composite sheet to obtain a marker display having the physical properties shown in Table 2.

Example 4 In Example 1, as the multi-layer synthetic paper, the three-layer synthetic paper "Yupo FPG110" (Okinawa Chemical Co., Ltd.) (thickness 110
μm, perforation rate 33%, density 0.780 g / cm ³ , uniaxial / biaxial / uniaxial structure), and the same procedure as in Example 1 was carried out to obtain a labeled display material having the physical properties shown in Table 1.

[0045]

[Table 1]

[0046]

[Table 2]

[0047]

EFFECT OF THE INVENTION A biaxially stretched thermoplastic film is used as a base material layer.
(B ¹ ) and a thermoplastic resin uniaxially stretched film containing an inorganic fine powder as a paper-like layer (B ² ) on the opposite side of the multi-layer synthetic paper (B), a support made of an extruded resin foam sheet (A ) Is attached to the marker display of the present invention is excellent in tear strength and lightness.
Even if it is fastened with a thumbtack or the like, when the indicator is shaken by wind or when the operator pulls the indicator with his or her hand, the tensile stress and the orientation direction (stretching direction) of the multilayer synthetic paper are Even if the two coincide with each other, the marking display body is not torn and cannot be reused.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a marker display body of the present invention.

FIG. 2 is a perspective view of the marker display of the present invention when it is perforated and used by hanging it on a fence at a construction site with a wire.

FIG. 3 is a perspective view of the sign display body of the present invention, which is used by fixing it to a wood plywood of a vertical signboard with a thumbtack.

[Explanation of symbols]

1 Marking body 2 Laminated body 3 Information to be transmitted by printing or writing 4 Voids Micropores 4a Inorganic fine powder 5 Fine bubbles 6 Thumbtack 7 Wire 8 Wooden frame (A) Support made of extruded resin foam sheet (B ¹ ) Base material layer (B ² ) Paper-like layer (B) Multi-layer synthetic paper (B ² ), (B ^{2 '} ) Paper-like layer (B ³ ) Other resin film layers

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Funato 23, Towada, Kamisu-cho, Kashima-gun, Ibaraki Prefecture Okaka Synthetic Paper Co., Ltd. Kashima Plant (72) Takao Yazaki Yokkaichi, Mie Prefecture Toho-cho No. 1 Mitsubishi Petrochemical Co., Ltd. in Yokkaichi Research Institute (72) Inventor Akihiko Egashira Toho-cho, Yokkaichi-shi, Mie No. 1 Toho-cho in Yokkaichi Research Center (72) Inventor Matsuno Takumi Mie 1 Toho-cho, Yokkaichi-shi, Japan Inside the Yokkaichi Research Institute, Mitsubishi Petrochemical Co., Ltd.

Claims (1)

[Claims] 1. A biaxially stretched thermoplastic film having fine porosity on at least one side of a support (A) having a wall thickness of 50 μm or more and made of an extruded resin foam sheet having a foaming ratio of 1.05 to 10 times as a base material. Layer (B ¹ ) with 0.1-65 inorganic fine powder
A uniaxially stretched film of a thermoplastic resin contained in a weight% ratio is used as a paper-like layer (B ² ), and a multi-layer synthetic paper (B) having a wall thickness of 50 to 500 μm is provided on the surface of the paper-like layer (B ² ). A laminated body having a wall thickness of 100 to 5,000 μm integrally bonded to each other to form a sheet, and information to be transmitted is printed or written on the surface of the paper-like layer (B ² ). A sign display that does.