JP2006281452A - Antistatic laminate sheet and molded product thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the generation of wear powder that contaminates a packaged object such as an electronic component, to have excellent impact resistance, mechanical strength and rigidity, to be easily formed by vacuum forming or the like, and to conduct after secondary forming. An antistatic laminate sheet having good followability and a molded product formed by molding the same are provided.
A surface layer (A) containing a rubber-modified styrene resin (a1) as a main component and containing a polyolefin (a2), a polyether antistatic agent (a3) and a styrene elastomer (a4) is a rubber. An antistatic laminate sheet characterized by being laminated on at least one side of a base material layer (B) made of a modified methacrylstyrene resin, and a molded product obtained by molding the sheet.
[Selection figure] None

Description

  The present invention has an antistatic property that is less affected by humidity, has excellent durability, and is suitable for an electronic component packaging material that has excellent wear resistance, impact resistance, mechanical strength, rigidity, moldability, and the like. The present invention relates to a preventive sheet and a molded product thereof.

  Styrenic resins are used in a wide range of fields, including food packaging, because they are inexpensive and have excellent secondary processability. However, they have a high surface resistance and are easily charged, which may cause dust and other damage to the appearance. In particular, the electronic parts packaging material has drawbacks such as causing an electrostatic failure. For this reason, conventionally, a method of kneading a surfactant, carbon black or the like into these styrene resins, or a method of applying a conductive paint has been taken.

  However, the surfactant is inferior in sustainability of the antistatic performance, and has a drawback that the performance is deteriorated by washing with water or friction. On the other hand, when carbon black is kneaded, electronic parts are contaminated due to carbon detachment, and when conductive paint is applied, the coating film on the sheet surface is stretched at the time of molding, resulting in a significant decrease in conductive performance. .

  Therefore, as a method of imparting continuous antistatic performance without causing electronic component contamination and molding performance degradation, for example, a sheet in which a resin layer in which a polyether ester antistatic agent is blended with a styrene resin is laminated. It has been proposed (see, for example, Patent Document 1).

  Such a technique is effective for providing continuous antistatic performance, but since styrene resins are inferior in wear resistance, for example, when an electronic component vibrates on a tray, the base styrene resin Wearing powder is generated by shaving itself and becomes a source of contamination of electronic components.

  On the other hand, since the propylene-based resin sheet has an elastic recovery force on the surface and high wear resistance, the contamination of electronic components due to generation of wear powder is extremely small. However, the heat shrinkage is large, the dimensional stability is inferior, and the rigidity is low. For example, the heat shrinkage is not suitable for a tray for automatic conveyance by a robot.

  In order to suppress such defects of the propylene-based resin, a polymer-type antistatic agent is blended with the olefin resin in a base material layer composed of at least one resin selected from styrene-based resins and olefin-based resins. A sheet in which surface layers are laminated has been proposed (see, for example, Patent Document 2). However, when a styrene resin is used for the base material layer in order to increase the rigidity, the interlaminar adhesion with the surface layer made of the olefin resin is lowered. Moreover, when an olefin resin is mix | blended with a base material layer, it has the fault that the rigidity and dimensional stability of a lamination sheet fall.

  Moreover, a resin composition in which polyether ester amide and polyolefin are blended with a styrenic resin is known as a composition that can be expected to have a similar effect with different purposes (see, for example, Patent Document 3). However, since the use ratio of the olefin resin in the composition is high, its rigidity and dimensional stability are still not sufficient.

JP 2001-88251 A JP 2004-90609 A Japanese Patent Laid-Open No. 5-78535

  The problem to be solved by the present invention is that there is little generation of wear powder that contaminates a packaged article such as an electronic component, excellent impact resistance, mechanical strength and rigidity, and secondary molding by vacuum molding or the like is easy. Another object of the present invention is to provide an antistatic laminate sheet having good conductivity following secondary molding and a molded product formed by molding this antistatic laminate sheet.

  As a result of intensive investigations to achieve the above-mentioned problems, the present inventors have made a rubber-modified styrene resin as a main component, a surface layer composed of a polyolefin, a polyether antistatic agent, and a styrene elastomer. By laminating on the surface of at least one side of the base material layer made of modified methacrylstyrene resin, there is little generation of wear powder that contaminates the packaged object such as electronic parts, and it has excellent impact resistance, mechanical strength and rigidity, And it discovered that the secondary shaping | molding by vacuum forming etc. was easy and the electroconductive followability after secondary shaping | molding was favorable, and came to complete this invention.

  That is, in the present invention, the surface layer (A) containing the rubber-modified styrene resin (a1) as a main component and containing the polyolefin (a2), the polyether antistatic agent (a3), and the styrene elastomer (a4) is provided. The base layer (B) made of rubber-modified methacryl styrene resin is laminated on at least one side of the base layer (B), and is obtained by molding the antistatic laminate sheet. The molded product characterized by the above is provided.

  The antistatic laminate sheet of the present invention has less generation of wear powder, is excellent in impact resistance, mechanical strength and rigidity, is easy to perform secondary molding, and has good conductivity followability after molding. It is useful as a packaging article.

  Hereinafter, the present invention will be described in detail. The surface layer (A) of the antistatic laminate sheet in the present invention comprises a rubber-modified styrene resin (a1) as a main component, a polyolefin (a2), a polyether antistatic agent (a3), and a styrene elastomer (a4). It contains. The rubber-modified styrene resin (a1) used here is a rubber-modified styrene graft polymer obtained by grafting a styrene monomer to a rubber-like polymer. Specific examples include high-impact polystyrene (HIPS), and two or more types having different compositions and blending ratios can be used in combination.

  Examples of the styrene monomer constituting the rubber-modified styrene resin (a1) include styrene, α-methylstyrene, methylstyrene, ethylstyrene, t-butylstyrene, bromostyrene, chlorostyrene, and the like. Although the above may be used in combination, styrene is particularly preferable from the viewpoint of excellent reactivity with the rubber-like polymer.

  Moreover, you may use the other monomer copolymerizable with the styrene-type monomer which comprises rubber-modified styrene-type resin (a1) as needed. Examples of the other copolymerizable monomer include (meth) acrylic acid ester, (meth) acrylic acid, acrylonitrile, maleic anhydride, phenylmaleimide and the like. The other copolymerizable monomers may be used alone or in combination of two or more.

  On the other hand, as the rubber-like polymer to be grafted with the styrene monomer, natural rubber, synthetic rubber or the like can be used, and a homodiene polymer such as butadiene, isoprene, 1,3-pentadiene, or each of these. Block copolymer of component and styrene monomer, ethylene-propylene copolymer elastomer, ethylene-propylene-diene copolymer, ethylene-vinyl acetate copolymer elastomer, (meth) acrylic acid alkyl ester copolymer Among them, elastomers and the like can be mentioned. Among them, a diene rubber-like polymer typified by a copolymer of butadiene and a styrene monomer is preferable in terms of excellent reactivity and compatibility with the styrene monomer.

  The melt flow rate of the rubber-modified styrenic resin (a1) is not particularly limited, but is preferably 0.1 to 15 g / min (200 ° C., 49.0 N) because of excellent extrusion film forming properties.

  On the other hand, the polyolefin used in the present invention is not particularly limited. Specifically, a homopolymer of propylene, propylene, and ethylene, butene-1,3-methylbutene-1,3-methylpentene-1 , 4-methylpentene-1 and other α-olefin copolymers, propylene and other copolymerizable unsaturated monomers, and the like. More specifically, a propylene-ethylene block copolymer, a propylene-ethylene random copolymer, a propylene-ethylene-diene compound copolymer, and the like can be given. You may use these individually or in combination of 2 or more types. Among these, since a sheet having good extrusion film formability and excellent wear resistance can be obtained, the main component may be a propylene homopolymer, a propylene-ethylene random copolymer, or a propylene-ethylene block copolymer. preferable. Moreover, when cold resistance is required, it is preferable to mix low density polyethylene with the propylene polymer.

  The melt flow rate of the polyolefin (a2) is not particularly limited, but is preferably 0.1 to 15 g / min (230 ° C., 21.2 N) because of excellent extrusion film forming properties, and further, the appearance is good. It is more preferably 0.1 to 10 g / min since a sheet is obtained.

  The polyether-based antistatic agent (a3) is not particularly limited, but a sheet having excellent compatibility with the polyolefin (a2), excellent mechanical strength, and excellent surface smoothness and antistatic performance can be obtained. A block copolymer of a polyolefin block and a polyether block is preferred.

  Examples of the olefin monomer constituting the polyolefin block include ethylene, propylene, 1-butene and the like. Of these olefins, a polyolefin block containing at least one selected from ethylene and propylene is preferred.

Examples of the monomer constituting the polyether block of the polyether antistatic agent include alkylene oxides, and C _2-4 alkylene oxides such as ethylene oxide and propylene oxide are particularly preferable.

  The polyolefin block and the polyether block are bonded via an ester bond, an amide bond, an ether bond, a urethane bond, an imide bond, or the like. These bonds can be introduced, for example, by modifying the polyolefin with a modifier to introduce active hydrogen atoms, and then addition polymerization of a hydrophilic monomer such as alkylene oxide. Examples of such a modifier include unsaturated carboxylic acid or its anhydride, lactam, aminocarboxylic acid, oxygen, ozone, hydroxylamine, diamine, and the like.

  In order to prevent a decrease in strength when the rubber-modified styrene resin (a1), polyolefin (a2), and polyether antistatic agent (a3) are mixed, the surface layer (A) has a styrene elastomer (as a compatibilizer). It is preferable to add a4). As the styrene elastomer (a4), block type styrene elastomer such as block copolymer of styrene monomer and diene monomer and hydrogenated product thereof, or block copolymer elastomer of styrene and olefin Is mentioned. In particular, hydrogenated styrene butadiene block copolymer (SEBS), hydrogenated styrene isoprene block copolymer (SEPS), and the like are preferably used because they are excellent in improving the mechanical properties. In these styrene elastomers, part or all of the styrene block may be a styrene derivative such as methylstyrene, or a carboxyl group, an acid anhydride group, an epoxy group, an amino group, a hydroxyl group, an alkoxy group. Or a modified styrenic elastomer having at least one functional group selected from derivatives thereof.

  In addition to the rubber-modified styrene resin (a1), the polyolefin (a2), the polyether antistatic agent (a3), and the styrene elastomer (a4), the surface layer (A) is further modified with a modified styrene copolymer (a5 ) Is preferably added. The modified styrene copolymer (a5) is a styrene polymer having at least one functional group selected from a carboxyl group, an acid anhydride group, an epoxy group, an amino group, a hydroxyl group, an alkoxy group or a derivative thereof. In particular, a carboxyl group, an acid anhydride group, and an epoxy group-modified styrenic polymer are preferably used because they promote the dispersion of the antistatic agent and are excellent in electrical characteristics such as surface resistivity and mechanical properties. Examples of the styrenic monomer used here include styrene, α-methylstyrene, methylstyrene, ethylstyrene, t-butylstyrene, bromostyrene, chlorostyrene, etc. Among them, styrene is methacrylic acid, maleic anhydride. It is preferable at the point which is excellent in the reactivity with an acid etc.

  In addition, the resin constituting the surface layer was selected from ethylene elastomer, carboxyl group, acid anhydride group, epoxy group, amino group, hydroxyl group, alkoxy group and derivatives thereof as long as compatibility is not hindered. A modified ethylene elastomer having at least one functional group may be blended.

  Furthermore, in order to further improve the antistatic effect, various compounds may be added as necessary. Specific examples include salts such as lithium salts and sulfonic acid metal salts.

  The blending weight ratio of the rubber-modified styrenic resin (a1) and the polyolefin (a2) is (a1) / (a2) = 50 / in terms of excellent balance between interlayer adhesion to the base material layer (B) and wear resistance. 50-90 / 10 is preferable.

  The blending amount of the polyether antistatic agent (a3) with respect to 100 parts by weight of the total of the rubber-modified styrene resin (a1) and the polyolefin (a2) is 10 to 10 in that the balance between surface resistivity and mechanical properties is excellent. 40 parts by weight is preferred.

  The total amount of the styrene elastomer (a4) and the modified styrene resin (a5) is preferably 1 to 30 parts by weight in consideration of the compatibilizing effect and mechanical properties of the surface layer composition.

  The rubber-modified methacrylstyrene resin (b1) constituting the base layer (B) is obtained by grafting a styrene monomer and a (meth) acrylic monomer to a rubber-like polymer. Two or more different types of compositions and blending ratios can be used in combination. As the styrene monomer constituting the rubber-modified methacryl styrene resin, styrene is preferable from the viewpoint of excellent reactivity with the rubber-like polymer, and as the (meth) acrylic monomer, methyl methacrylate, ethyl acrylate, Butyl acrylate and the like are preferable in terms of excellent reactivity with styrene. Further, if necessary, one or more other monomers copolymerizable with a styrene monomer or a (meth) acrylic monomer may be used in combination. On the other hand, as a rubbery polymer to be grafted with a styrene monomer, a diene rubbery polymer represented by a copolymer of butadiene and a styrene monomer is reactive with each monomer, It is preferable at the point which is excellent in compatibility.

As the rubber-modified methacrylstyrene resin (b1), a sheet excellent in impact strength and rigidity can be obtained. Styrene copolymer (MABS resin) and the like are preferable. The melt flow rate of the rubber-modified styrene resin is not particularly limited, but is preferably 0.1 to 15 g / min (200 ° C., 49.0 N) because of excellent extrusion film forming properties.

Furthermore, the rubber-modified methacrylstyrene resin (b1) is preferably a graft copolymer resin having transparency in that the visibility of the contents can be imparted to the antistatic laminate sheet.

The rubber-modified methacrylstyrene resin (b1) having transparency has a difference in refractive index between a continuous phase made of a copolymer of a styrene monomer and a (meth) acrylic monomer and a dispersed phase made of a rubber-like polymer. It can be obtained by using a known method such as polymerization by appropriately adjusting the blending ratio of each monomer and the rubbery polymer composition so as to be within ± 0.005.

  In addition, the base material layer (B) made of rubber-modified styrenic resin has a surplus material at both ends of the sheet generated by trimming during film formation, a scrap pulverized product of the remaining material that has been molded and punched out of the molded product, etc. May be recovered and added.

Furthermore, to give buffer properties to the laminated sheet. The base material layer (B) made of a rubber-modified methacryl styrene resin may be foamed to form a foam. Examples of the foaming method include a method using a foaming agent and a method using a reaction product gas. Among these, a method of extrusion foaming using a foaming agent is preferable.

  In the present invention, any additive can be appropriately blended as necessary. The type of the additive is not particularly limited. For example, other thermoplastic resins and elastomers, silica, calcium carbonate, magnesium carbonate, calcium sulfate, talc and other inorganic fillers, organic fibers, titanium oxide and other pigments, dyes, Lubricants such as stearic acid, zinc stearate, calcium stearate, magnesium stearate, ethylene bis stearylloamide, mold release agents, plasticizers such as mineral oil, hindered phenols and phosphorus antioxidants, UV absorbers, metals Examples include whiskers, other additives, and mixtures thereof.

  The manufacturing method of the antistatic sheet of the present invention is not particularly limited, and various methods can be used. The resin may be directly formed by dry blending, or a part or all of the resin may be compounded in advance and then formed. The compounding method is generally a melt kneading method such as a Banbury mixer, a single screw extruder, a multi-screw extruder, or a kneader, but is not limited thereto. The laminated sheet is formed by using a plurality of extruders, laminating each layer inside a feed block, multi-die, etc., and then co-extrusion method to extrude into a sheet form from the T-die, forming the surface layer alone in advance, Generally, a method of thermally laminating the surface layer of the base styrenic resin layer by extrusion is used. Although the manufacturing method of a lamination sheet is not limited to these, since there are few manufacturing processes, a coextrusion method is preferable.

  In the present invention, the layer structure of the laminated sheet is particularly limited as long as the surface layer (A) containing the polyether antistatic agent (a3) is laminated on at least one surface of the base material layer (B). However, in order not to cause a difference in antistatic performance between the front and back surfaces of the antistatic sheet or warping of the molded product, surface layers (A) are arranged on both sides of the base material layer (B) (A) / ( A symmetrical configuration such as B) / (A) is preferred. Further, if necessary, a two-layer structure such as (A) / (B) may be used, or another resin layer may be added within a range not deteriorating mechanical properties and the like (A) / (B) / You may laminate | stack four or more layers like (C) / (A). Further, as shown in (A) / (B) / (A ′), those using different surface layers (A) and (A ′) with different concentrations and types of the antistatic agent (a2), (A) / (B) / (B ') / (B) / (A), etc., may be used in which the base material layers (B) and (B') having different resin compositions are used. For example, when it is desired to make a difference in the antistatic effect between the front and back surfaces of the sheet, it can be solved by adopting the (A) / (B) / (A ′) type configuration.

  The ratio (A) / (B) of the total thickness of the surface layer (A) and the total thickness of the base material layer (B) is 1/99 to 50/50 in terms of excellent antistatic properties and rigidity of the laminated sheet. It is preferable that it is the range of these. Among these, it is more preferable that (A) / (B) is in the range of 3/97 to 40/60 because a sheet having an excellent balance between antistatic properties and mechanical properties after secondary molding can be obtained. In view of excellent film properties, (A) / (B) is particularly preferably in the range of 5/95 to 30/70.

When the surface layer (A) is laminated on both surfaces of the base material layer (B), if both surface layers are the (A1) layer and the (A2) layer, respectively, the antistatic performance and the dimensional stability of the secondary molded product will be improved. In order to obtain an excellent sheet, it is preferable that the (A1) layer and the (A2) layer have the same thickness. Specifically, the average thickness (T1) of the (A1) layer and the average thickness (T2) of the (A2) layer are preferably in the range of the following formula.
(T1 + T2) /2×0.8≦T1≦ (T1 + T2) /2×1.2
(T1 + T2) /2×0.8≦T2≦ (T1 + T2) /2×1.2

  Although the thickness of the entire sheet is not particularly limited, a thickness of 0.1 to 5.0 mm is required for forming a component packaging container or the like by a method such as vacuum forming, pressure vacuum forming, pressure forming, press forming, match mold forming, or the like. More preferably, a thickness of 0.15 to 3.0 mm is more preferable.

The antistatic laminate sheet of the present invention preferably has a surface resistivity of 10 ⁸ Ω to 10 ¹² Ω, for example, in order to prevent electrostatic damage due to charging of electronic components when used in an electronic component packaging container.

  The antistatic laminate sheet of the present invention can be used as it is, and can be subjected to secondary processing by a known molding method. For example, it can be suitably used as a packaging container for electronic parts such as trays and carrier tapes by thermoforming such as vacuum forming, pressure vacuum forming, pressure forming, press forming, and match mold forming. The molding method and the use of the sheet and the molded product are not limited to this.

  EXAMPLES Next, although an Example and a comparative example are given and this invention is demonstrated in detail, this invention is not limited at all by these illustrations.

In addition, each characteristic value in an Example was evaluated in accordance with the following method.
1. Surface resistivity In accordance with JIS K 6911, the laminated sheet was allowed to stand in a constant temperature and humidity chamber at 23 ° C. and 50% RH for 1 day, and then applied using a digital ultrahigh resistance meter R8340A manufactured by Advantest and a resistance chamber R12704A. The surface resistivity was measured at a voltage of 500 V, an application time of 1 minute, and a measurement time of 1 minute.

2. Abrasion resistance A 90 × 35 mm frame was mounted on the table of a shaker made by TAKASHOW MINI SHAKER MODEL M-6, and a laminated sheet test piece of the same size was mounted in the frame after measuring the weight (W1). A polypropylene plate was attached to one end of the lower surface of a 76 mm long × 26 mm wide × 1 mm thick commercial slide glass so that the edge angle of the glass was 5 °. For reinforcement, a metal plate having the same size as the slide glass and a thickness of 1 mm was attached to the upper surface of the slide glass. Two iron weights each having a diameter of 33 mm and a height of 29 mm and 200 g were fixed to both ends of the metal plate, two in total. The above-mentioned slide glass was placed on the laminated sheet test piece in the frame, and was shaken for 15 minutes at a shaking speed of about 300 reciprocations / minute, and the laminated sheet test piece was rubbed with the edge of the slide glass. The weight (W2) of the test piece after completion of the friction was measured, and the wear amount (Wr) was determined by the following equation.
Wear amount Wr (mg) = W1 (mg) -W2 (mg)

3. Surface impact strength Both the strike core and the cradle have a diameter of 12.7 mm, a weight is dropped on a laminated sheet having a thickness of 0.5 mm, and a 50% fracture height (H ₅₀ ) is calculated according to the following formula. It was then calculated 50% breaking energy _{(E 50)} by the following equation.
H ₅₀ = H _I + d [Σ (i · n _i ) / N ± 1/2]
H _I : Test height (cm) when the height level (i) is 0
d: Height interval when moving the test height up and down (cm)
i: when the H _I is 0, the height level of increasing or decreasing one by one
n _i : Number of test pieces destroyed (or not destroyed) at each level
N: Total number of test pieces destroyed (or not destroyed)
± 1/2: Use negative sign when using destructive data, use positive sign when using non-destructive data
E ₅₀ = m · g · H ₅₀
m: Mass of weight (kg)
g: acceleration of gravity (9.80665 m / s ² )
H ₅₀ : 50% fracture height (m)

4). Tensile yield strength and tensile modulus Tensile speed 50 mm / min using a 0.5 mm thick type 5 test piece cut out from an antistatic laminate sheet according to JIS K 7127 using a strograph API II manufactured by Toyo Seiki Seisakusho Co., Ltd. The tensile yield strength was measured at 1 mm / min.

5. Delamination The surface layer (A) and base material layer (B) of the obtained laminated sheet were peeled by hand and evaluated according to the following criteria.
Criteria for delamination ○: Does not peel. Alternatively, there is adhesion between the layers, and the flakes are agglomerated and separated in the surface layer (A) or the base material layer (B).
X: There is no adhesion between layers, and delamination easily. Alternatively, the surface layer is brittle and breaks and cannot be peeled off.

Examples 1-4 and Comparative Examples 1-4
As the rubber-modified styrene resin (a1), the following was used.
S1: High impact polystyrene “Dick Styrene GH-8300-1” manufactured by Dainippon Ink & Chemicals, Inc. (MFR: 3.0 g / min)
S2: Methyl methacrylate / butadiene / styrene copolymer (methyl methacrylate content 15 wt%, MFR: 5.0 g / 10 min)

The following were used as polyolefin (a2).
・ P1: Polypropylene (MFR: 0.5g / 10min)
P2: Propylene-ethylene block copolymer (MFR: 0.5 g / 10 min)

As the polyether antistatic agent (a3), the following were used.
C: polyether-polyolefin antistatic agent “Pelestat 230” manufactured by Sanyo Chemical Industries

As the styrene elastomer (a4), the following were used.
D: hydrogenated styrene-butadiene block copolymer (styrene content 67 wt%, MFR 2.0 g / 10 min)

The following were used as the modified styrene copolymer.
E1: Styrene-methacrylic acid copolymer (MFR: 2.0 g / min)
E2: Styrene-maleic anhydride copolymer (MFR: 0.6 g / min)

As the rubber-modified methacrylstyrene resin (b1), the following was used.
M: “Clear Pact TI-300” manufactured by Dainippon Ink and Chemicals, Inc. (MFR: 3.0 g / min)

  The laminated sheet is a laminated sheet comprising a 30 mm diameter non-vented single screw extruder (L / D = 28), a 65 mm diameter non-vented single screw extruder (L / D = 25), a feed block, a T die, and a take-up machine. A film was formed by a coextrusion method using a manufacturing apparatus. The surface layer (A) was prepared by melting and kneading a resin having the composition shown in Tables 1 and 2 and an antistatic agent in advance at 220 ° C. with a twin screw extruder at a 30 mm diameter extruder, The base material layer (B) is a center layer, and a resin having a composition shown in Tables 1 and 2 is extruded from a 65 mm diameter extruder with a layer structure shown in Tables 1 and 2 while being melt-kneaded, and laminated in a feed block. Then, an antistatic laminated sheet of (A) / (B) / (A) with a thickness of 0.5 mm and a two-layer / three-layer structure was formed by a T die having a lip opening of 1.2 mm. The set temperatures at the cylinder tip of the extruder were 30 mm diameter extruder: 230 ° C., 65 mm diameter extruder: 220 ° C., and the feed block and T-die were 230 ° C. The performance of the obtained antistatic laminate sheet was evaluated according to the method described above, and the results of Examples and Comparative Examples are shown in Tables 1 and 2.

Claims (14)

The surface layer (A) containing the rubber-modified styrene resin (a1), the polyolefin (a2), the polyether antistatic agent (a3), and the styrene elastomer (a4) as essential components is a rubber-modified methacrylstyrene resin. An antistatic laminate sheet, which is laminated on at least one side of the base material layer (B) comprising (b1). The antistatic laminate sheet according to claim 1, further comprising a modified styrene resin (a5) in the surface layer (A). In the surface layer (A), the weight ratio of the rubber-modified styrenic resin (a1) and the polyolefin (a2) is (a1) / (a2) = 30/70 to 90/10, and (a1) and The total amount of the polyether-based antistatic agent (a3) is 10 to 40 parts by weight, the styrene-based elastomer (a4) and the modified styrene-based resin (a5) with respect to 100 parts by weight of the total (a2). The antistatic laminate sheet according to claim 2, wherein the amount is 1 to 30 parts by weight. The antistatic laminate sheet according to any one of claims 1 to 3, wherein the polyolefin (a2) is a propylene-based resin. The antistatic laminate sheet according to any one of claims 1 to 4, wherein the polyether antistatic agent (a3) is a copolymer type antistatic agent of a polyolefin block and a hydrophilic block. The styrene elastomer (a4) is a block copolymer of a styrene monomer and a diene monomer, a hydrogenated product thereof, or a styrene-olefin block copolymer. The antistatic laminated sheet in any one of -5. The modified styrene resin (a5) is a styrene polymer having at least one functional group selected from a carboxyl group, an acid anhydride group, an epoxy group, an amino group, a hydroxyl group, an alkoxy group, or a derivative thereof. The antistatic laminate sheet according to claim 2, wherein the antistatic laminate sheet is present. The rubber-modified methacrylstyrene resin (b1) is a copolymer resin obtained by grafting a styrene monomer and a (meth) acrylic monomer to a rubber-like polymer. Antistatic laminated sheet. The antistatic laminate sheet according to any one of claims 1 to 8, wherein the rubber-modified methacrylstyrene resin (b1) is a graft copolymer resin having transparency. The antistatic laminate sheet according to claim 1, which has a surface resistance value of 10 ⁸ Ω to 10 ¹² Ω. The antistatic laminate sheet according to claim 1, wherein the surface layer (A) is laminated on both surfaces of the base material layer (B). The ratio (A) / (B) between the total thickness of the surface layer (A) and the thickness of the base material layer (B) is 1/99 to 50/50. The antistatic laminated sheet of description. The said base material layer (B) is a foaming layer, The antistatic laminated sheet as described in any one of Claims 1-12. A molded article obtained by molding the antistatic laminate sheet according to any one of claims 1 to 13.