KR20030030924A - A static free separation sheet - Google Patents

Abstract

PURPOSE: An antistatic separate sheet is provided, to allow it to be prepared with a low cost easily and to improve the antistatic performance on the entire sheet. CONSTITUTION: The antistatic separate sheet comprises a polyolefin-based resin and a composition comprising a polymer resin essentially having both polyolefin-based skeleton and a hydrophilic polymer skeleton; and it has a surface inherent resistivity of 10¬11 Ohm or less. Also the antistatic separate sheet comprises a polyolefin-based resin, a composition comprising a polymer resin essentially having both polyolefin-based skeleton and a hydrophilic polymer skeleton, and a composition comprising a conductive fiber member; and it has a surface inherent resistivity of 10¬7 Ohm or less. Preferably the conductive fiber member is a carbon fiber. Preferably the polyolefin-based resin is polypropylene.

Description

Non-static Separator Sheets {A STATIC FREE SEPARATION SHEET}

The present invention relates to a separate sheet (referred to as a tier sheet) used when stacking containers in multiple stages on a pallet and unitizing the containers.

Conventionally, various kinds of containers are used in many fields, such as metal containers used for soft drinks, beer, cooking oil, canned food, glass containers used for pharmaceuticals, industrial medicines, liquid seasonings, or plastic containers used for liquid detergents, seasonings, and ice cream. It is used in large quantities. And most of the unloading operations, such as packing and conveying of this container, are mechanized or automated.

As one aspect of said packing and conveyance, there exists a unit rod. This method is a method of carrying out the unloading by the unit integrally, without disturbing in the middle, by gathering them in a suitable number or weight when packing or conveying a container etc. in one unit.

In other words, after stacking a number of containers on a pallet in a multi-stage multi-stage unit and providing them for unloading operations such as shrink packaging or stretch packaging, the containers are stabilized when unitizing the containers. A separate sheet is inserted into each stage for the purpose of preventing the collapse of the load and dustproofing.

Conventionally, the paper-made thing is used a lot as a separate sheet. However, the sheet made of a paper has a limitation in repeated use since mechanical strength such as bending stiffness and impact resistance decreases due to absorption, moisture absorption, and the like. In addition, since the material is paper, fluffing, damage, and dirt are aggravated, and it is unsanitary. Therefore, its use is restricted in fields where dust and dust such as food and medical products are reluctant.

There are also plastic separate sheets to solve these problems. However, the separate sheets made of plastic have a problem of serious charging and easy adhesion of dust and dust. Therefore, as a method of preventing the charging of the plastic separate sheet, a method of incorporating an antistatic agent, carbon black, or the like is often proposed.

However, as a method of compounding the antistatic agent, the antistatic agent is leached by use for a long time or the sheet is washed, whereby the surroundings and the cleaning liquid are contaminated, or the antistatic performance is reduced.

On the other hand, in the case where carbon black is blended, carbon powder may come out on the surface, which itself becomes dust or dust, or may cause environmental pollution. Moreover, since the sheet becomes a blackish color by mix | blending carbon black, usage may be restrict | limited.

Therefore, Japanese Patent Application Laid-Open No. 7-59642 discloses a separate sheet provided with antistatic performance by blending conductive fibers with a polyolefin resin. By blending the conductive fibers in this manner, a separate sheet having excellent antistatic performance and excellent environmental pollution while improving water resistance and mechanical strength can be obtained.

However, when the conductive fibers are blended with the polyolefin-based resin, since the polyolefin-based resin is an insulating material, whether or not the conductive fibers form a network therein, that is, the conductive fibers are in contact with each other over the entire sheet. The antistatic performance is critically catastrophic, whether or not it is close enough to release the charged charge. For this reason, when there exists an area | region which a conductive fiber does not contact or adjoin, the site | part in which antistatic performance fell locally may generate | occur | produce, and antistatic performance will become unstable.

In the case where the conductive fiber is used, if the separate sheet is not molded at a low speed, the conductive fiber is broken during molding of the separate sheet, or the entanglement between the conductive fibers becomes difficult to be obtained, resulting in a distance between the conductive fibers. Since it becomes large and the network by a conductive fiber is damaged, productivity of a separate sheet will fall. In other words, in order to exhibit good antistatic performance over the entire sheet, the molding speed must be slowed down, resulting in a high cost of manufacturing the separate sheet.

Japanese Patent Application Laid-Open No. 8-13527 discloses a separate sheet in which the amount of the conductive fiber is reduced by layering the separate sheet and blending the conductive fiber only in the surface layer. Further, Japanese Patent Laid-Open No. 11-35064 discloses a separate sheet in which an antistatic performance is realized by mixing with a hydrophilic polymer in a separator sheet made of ABS polymer.

At the same time, the method of multilayering the separate sheet and blending the conductive fibers only in the surface layer is the best method because the multilayer sheet must be made and the apparatus is complicated. In addition, the method of mixing with the hydrophilic polymer can realize the antistatic performance when the separator sheet is made of ABS polymer because the ABS polymer has compatibility with the hydrophilic polymer, but when the separator sheet is a polyolefin resin, the polyolefin System resins are hydrophobic polymers and have extremely poor compatibility with hydrophilic polymers. Therefore, even if the polyolefin resin and the hydrophilic polymer are mixed, both are separated from each other at the time of molding to form a schematic structure, and the hydrophilic polymer cannot be dispersed in the polyolefin resin. It is difficult to give antistatic performance over.

A first object of the present invention is to provide a non-electrolytic separator sheet which can be manufactured at low cost and easily, and which is further imparted antistatic performance over the entire sheet surface.

A second object of the present invention is to provide a non-electrostatic separator sheet, in which a stable antistatic performance is obtained over the entire sheet even when molded at a high speed while blending conductive fibers with polyolefin resin to impart antistatic performance.

According to the first embodiment of the present invention, in a non-electrostatic separator sheet containing a polyolefin resin, a composition in which a copolymer resin having both a polyolefin skeleton and a hydrophilic polymer skeleton is mixed with the polyolefin resin described above A separate sheet is provided, which includes a little and has a surface resistivity of 10 ¹¹ Ω or less.

In this way, a copolymer resin having both a polyolefin skeleton and a hydrophilic polymer skeleton is mixed with the polyolefin resin, and the copolymer resin is commonly dispersed in the polyolefin resin. Even in the case of the separator sheet using the polyolefin resin, antistatic performance can be obtained over the entire sheet without conductive fibers. Moreover, since it can manufacture similarly to shape | molding a normal polyolefin resin sheet only by mixing a copolymer resin with polyolefin resin, manufacture is also easy.

According to the second embodiment of the present invention, in the non-electrostatic separator sheet containing the polyolefin resin, the copolymer resin having both the polyolefin skeleton and the hydrophilic polymer skeleton, and the conductive fiber material, the polyolefin resin described above A separate sheet is provided comprising at least a composition mixed in the composition, wherein the surface resistivity is 10 ⁷ Ω or less.

In this way, a copolymer resin having both a polyolefin skeleton and a hydrophilic polymer skeleton is mixed with the polyolefin resin, and the copolymer resin is compatible with and dispersed in the polyolefin resin. As a result, even when the separator sheet is formed at high speed and the distance between the conductive fibers increases, the network of conductive fibers can be formed satisfactorily even through the copolymer resin, so that stable antistatic performance can be obtained over the entire sheet.

(1st embodiment)

The separator sheet of the present embodiment is formed of a copolymer resin having both a polyolefin-based resin as a first component, a polyolefin-based skeleton, and a hydrophilic polymer skeleton as a second component, and these are mixed and molded into a sheet by an extrusion molding method or the like. .

In this way, by adding a copolymer resin having both a polyolefin skeleton and a hydrophilic polymer skeleton to the matrix of the polyolefin resin as the first component, since the part of the polyolefin skeleton of the copolymer resin is compatible with the polyolefin resin, Even if it is the separator sheet using the polyolefin resin which is a polymer, copolymerization resin is It is partially enclosed and dispersed in the matrix of polyolefin resin. As a result, even if expensive conductive fibers are not used, antistatic performance can be provided over the entire surface of the separator sheet. By incorporating the copolymerized resin into the polyolefin-based resin and exhibiting antistatic performance, the antistatic performance is not lowered by washing like a separate sheet containing a conventional antistatic agent, and the antistatic performance can be maintained permanently. have. In addition, since it is not necessary to use carbon black, it is possible to prevent the occurrence of dust and dust caused by the carbon black itself and also to prevent the color from becoming black. Moreover, since no conductive fiber is used, the separator sheet can be easily and efficiently produced with the same sense as for producing a conventional polyolefin resin.

In a separate sheet, content of copolymerization resin is 3-20 mass%.

If it is less than 3 mass%, there exists a possibility that sufficient antistatic performance may not be obtained. On the other hand, when it exceeds 20 mass%, there is a concern that the physical properties of the matrix of the polyolefin resin are greatly changed, and since the copolymer resin is more expensive than the polyolefin resin, it is disadvantageous in terms of production cost.

As polyolefin resin which is a 1st component, polypropylene resin, polyethylene resin, ethylene propylene copolymer resin, etc. can be used suitably. As polyolefin frame | skeleton which comprises copolymer resin, in order to disperse | distribute copolymer resin uniformly in polyolefin resin, it is good to use the same material as polyolefin resin. For example, when polyolefin resin is polypropylene, polypropylene is used suitably also for polyolefin frame | skeleton. In addition, as a hydrophilic polymer backbone which comprises a copolymer resin, an amide group, The polymer which has an alcohol group, a carboxyl group, etc. can be used, Specifically, a polyamide skeleton, a polyvinyl alcohol skeleton, a polyethyleneglycol skeleton, etc. are mentioned.

The surface specific resistance of the separate sheet is 10 ¹¹ Ω or less. If the surface resistivity exceeds 10 ¹¹ Ω, the antistatic performance is lowered and the particles and dust easily stick together. As for the thickness of a separate sheet, the range of 0.3-15 mm is suitable.

If the thickness is less than 0.3 mm, the mechanical strength such as the rigidity of the separate sheet is not sufficient, and if the thickness exceeds 15 mm, the weight of the separator becomes large, which may cause a problem in the automation and handling of the unloading operation.

When a separate sheet is used for conveyance and packing of the container which requires hygiene, such as a container for food-drinks or a container for chemicals, in order to suppress that mold and various germs generate | occur | produce in a separate sheet, an antimicrobial agent may be a little It is good to add to the surface. Although it does not restrict | limit especially as an antimicrobial agent, Antimicrobial metals, such as silver, copper, zinc, and the soluble glass containing silver ion especially can be used suitably. In addition, as a method of adding an antimicrobial agent to a separate sheet, either the method of apply | coating an antimicrobial agent to the surface of a separate sheet after shaping | molding, and the method of adding an antimicrobial agent as a 3rd component to the separator material before shaping | molding are applicable. Since the method of adding an antimicrobial agent to the separate sheet material before shaping | molding does not require the application | coating process after shaping | molding, a manufacturing process can be simplified and manufacturing cost can be reduced.

In the above-mentioned example, although the single-layered separator sheet was demonstrated to the example, you may have a multilayered structure. in this case, The use amount of copolymer resin can be reduced by the structure which laminated | stacked the sheet | seat containing said at least 1st component and the 2nd component as the surface layer on the one side or both surfaces of the sheet | seat of polyolefin resin as the main layer.

(2nd embodiment)

In 1st Embodiment mentioned above, although the stable antistatic performance was achieved over the sheet whole surface, without using a conductive fiber, a higher performance separate sheet may be required. In this embodiment, in order to satisfy such a request, although conductive fiber is used, the fall of the productivity by using conductive fiber is suppressed to the maximum.

That is, the separator sheet of the present embodiment is a copolymer resin having both of a first component, a polyolefin skeleton, and a hydrophilic polymer skeleton as a second component, a conductive fiber as a third component, a mixture of these and an extrusion molding method. Molded into a sheet by a sheet or the like.

About the 1st component and the 2nd component, resin, content, etc. which comprise them are the same as that of 1st Embodiment.

The conductive fiber which is a 3rd component can be used in order to provide antistatic performance to a separate sheet. By containing conductive fibers, the antistatic effect is not lowered by washing as the antistatic agent is blended, and since the antistatic performance can be maintained permanently and carbon black is not used, carbon black itself It can prevent the occurrence of dust and dust.

Examples of the conductive fiber include a fiber coated with metal powder such as silver, copper, brass, and nickel on metal fiber and glass fiber made of aluminum, brass, stainless steel, etc., in addition to general carbon fiber, or silver, copper, brass, nickel Synthetic fiber which mixed metal powders, such as these, etc. are mentioned. Among these, coating nickel with carbon fiber and carbon fiber is the best in terms of performance, such as rigidity and surface resistance at the time of blending, and also in terms of price. Although carbon fiber has a PAN system and a pitch system, PAN system can improve rigidity. The fibers may be either short fibers or long fibers, but at least the long fibers having an effect in blending amount are preferred.

On the other hand, the copolymer resin as the second component, even if the separator sheet is molded at high speed, eliminates adverse effects on the conductive fibers thereby, exhibits the properties of the conductive fibers to the maximum, and as a result, stabilizes the antistatic performance over the entire sheet. Can be used for

In the case where the conductive fibers are blended with the polyolefin-based resin to impart the antistatic performance, as described above, in order to have stable antistatic performance over the entire surface of the sheet, the conductive fibers are in contact with or in close proximity to each other in front of the sheet. It is necessary to form a network of conductive fibers over. However, when conductive fibers are blended, when the separator sheet is to be molded at high speed, the conductive fibers may be broken by the shear force added to the molten polyolefin resin during molding, and as a result, the average length of the conductive fibers It shortens and the network is damaged. Moreover, although it is remarkable especially in extrusion molding, when the forming speed is increased when the conductive fibers are blended, the degree of alignment of the conductive fibers in the extrusion direction is increased, and the entanglement of the conductive fibers in the direction intersecting this is prevented. It becomes hard to get.

On the other hand, as another method of imparting antistatic performance to the resin product, the hydrophilic polymer is mixed, and the charge generated in the resin product is lost in the resin product through the water in the air adsorbed on the surface by the hydrophilic polymer, It is known to prevent the charging of a product. By using this, even if the distance between conductive fibers becomes large, for example, because the conductive fibers are broken, or the degree of alignment in the extrusion direction is increased, forming a network of conductive fibers via a hydrophilic polymer is also possible. I can think of it.

However, since polyolefin resins are not hydrophobic and incompatible with hydrophilic additives, simply mixing hydrophilic polymers with polyolefin resins separates them from each other at the time of molding and forms a schematic structure. As a result, the hydrophilic polymer cannot be dispersed in the polyolefin resin, and the antistatic performance by the conductive fibers cannot be stably expressed over the entire sheet.

Therefore, as described above, a copolymer resin having both a polyolefin skeleton and a hydrophilic polymer skeleton is used as the first component of the polyolefin resin. By adding to a matrix, since the part of the polyolefin frame | skeleton of a copolymer resin is compatible with polyolefin resin, a copolymer resin is partially enclosed and dispersed in the matrix of polyolefin resin. As a result, the distance between the conductive fibers through which charges can move becomes larger than in the case of only the polyolefin resin, so that even when the distance between the conductive fibers is increased by molding the separate sheet at high speed, the copolymer resin is interposed therebetween. An electric charge can be moved between conductive fibers, and stable antistatic performance can be obtained over the entire surface of the separator sheet.

Although the surface intrinsic resistance value of a separate sheet requires a value which is hard to cause dust and dust, in this embodiment, considering that it contains a conductive fiber, 10 ⁷ ohm or less is required. When the surface resistivity exceeds 10 ⁷ Ω, the antistatic performance is low, and it is easy to cause dust and dust.

The thickness of the separate sheet is the same as in the first embodiment. In addition, also in this embodiment, it is good to add an antimicrobial agent to the surface at least by the use of a separate sheet similarly to having described in 1st Embodiment. Moreover, also in this embodiment, you may produce a separate sheet as a multilayered structure as described in 1st Embodiment.

(Example)

Hereinafter, it demonstrates with a comparative example about specific implementation of this invention.

First, the Example regarding 1st Embodiment is shown.

(Example 1-1)

As polyolefin resin which is a 1st component, Sun Aroma Polyolefin, E300A (brand name), and the antistatic agent made by Sanyo Chemical Industries, Ltd., PELESTAT3000 (brand name) are used as a copolymer resin which is a 2nd component. Then, this was mixed and molded in a single-layer T-die apparatus to prepare a separator sheet having a thickness of 1 mm. The copolymer resin used in this example has a polyolefin as a polyolefin skeleton, and has polyethylene glycol as a hydrophilic polymer skeleton. Content of copolymer resin is 10 mass%. The molding ability of the single-layer T-die apparatus was at most 10 m / min, and this example was molded at the maximum speed.

(Example 1-2)

A separate sheet was produced in the same manner as in Example 1-1 except that the oil content of the copolymerized resin was 5% by mass.

(Example 1-3)

Using a multilayer T-die apparatus, a separate sheet having a two-layer structure of a main layer and a surface layer was produced. As a material which comprises a main layer, Sun Aroma Polypropylene and E300A (brand name) were used. The surface layer was formed like what was used in Example 1-2. As for the thickness of each layer, the main layer was 0.85 mm and the surface was 0.15 mm, and the thickness of the whole sheet was 1 mm. The molding ability of the multilayer T-die apparatus was at most 10 m / min, and was molded at this maximum speed in this example.

(Comparative Example 1-1)

Using the polypropylene used in Example 1-1, it molded in the single-layer T-die apparatus similarly to Example 1-1, and produced the separator sheet of thickness 1mm. The forming speed of the separate sheet was 10 m / min.

(Comparative Example 1-2)

To the polypropylene used in Example 1-1, carbon fiber manufactured by TOHO TENAX Co., Ltd. and BESFIGHT HTA (trade name) were mixed as carbon fibers, and a single-layer T-die apparatus was used as in Example 1-1. Produced a 1 mm thick sheet. Content of carbon fiber was 10 mass%. In addition, regarding the molding speed, since the surface specific resistance value of a separate sheet increases when a molding speed is raised, it carried out to the limit to which the effect of a carbon fiber is exhibited. When the molding speed was lowered, there was a threshold value at which the surface specific resistance suddenly decreased, and in this example, the component speed at that time was 4 m / min.

(Comparative Example 1-3)

Using a multilayer T-die apparatus, a separate sheet having a two-layer structure of a main layer and a surface layer was produced. Polypropylene was used for the main layer similarly to the comparative example 1-1, and the composition similar to the comparative example 1-2 was used for the surface layer. As for the thickness of each layer, the main layer made 0.85 mm and the surface layer 0.15 mm, and made the thickness in the whole separator sheet 1 mm. Regarding the molding speed, it carried out by lowering to the limit at which the effect of the carbon fiber is exhibited, as in Comparative Example 1-2.

In this example, it was 3 m / min.

Table 1 shows the compositions and evaluation results of 1-1 to 1-3 in Examples 1-1 to 1-3 described above and the comparison. In Table 1, the material cost was based on the use of only polypropylene, and the case of 1.5 times or less exceeded "(circle)", 1.5 times, and the case of 2 times or less exceeded "○" and 2 times. In the case of "Δ", and the case of exceeding twice the width, "x" is indicated. In addition, regarding productivity, the case where the separate sheet was shape | molded at the maximum speed of a shaping | molding apparatus is shown by "(circle)" and the case where it shape | molded at the speed | rate of half or less of the maximum speed is represented by "x".

Table 1

Furtherance Surface specific resistance (Ω) Material Coast productivity Example 1-1 10% by mass of polypropylene copolymer resin (PP / polyethylene glycol) 10 ¹⁰ ○ ○ Example 1-2 5% by mass of polypropylene copolymer resin (PP / polyethylene glycol) 10 ¹¹ ○ ○ Example 1-3 Surface Polypropylene Copolymer 5% by mass (PP / Polyethylene Glycol) Main Layer Polypropylene 10 ¹¹ ◎ ○ Comparative Example 1-1 Polypropylene 10 ¹⁵ ◎ ○ Comparative Example 1-2 10% by mass of polypropylene carbon fiber 10 ⁶ × × Comparative Example 1-3 Surface polypropylene carbon fiber 10% by mass main layer polypropylene 10 ⁶ △ ×

In Examples 1-1 to 1-3, molding can be performed without any problem even if molding is performed with the maximum capability of the T-die apparatus, and the surface resistivity is also 10 ¹¹ Ω or less, and the separator sheet has sufficient antistatic performance. Can be obtained. On the other hand, in Comparative Example 1-1, the material cost was low and the productivity was good, but the surface resistivity increased to 10 ¹⁵ Ω and could not have sufficient antistatic performance. Moreover, in Comparative Examples 1-2 and 1-3, the antistatic performance was sufficient by containing carbon fiber, but in order to do this, the molding speed had to be lowered, and as a result, productivity fell below half. From the above, it was found that by containing a copolymer resin having a polyolefin skeleton and a hydrophilic polymer skeleton, a separate sheet having stable antistatic performance over the entire surface can be produced with high productivity without using carbon fibers.

Next, the Example regarding 2nd Embodiment is shown.

(Example 2-1)

As a polyolefin resin which is a 1st component, it is a polyolefin made by Sun Aroma, E300A (brand name), and a copolymer resin which is a 2nd component, The antistatic agent by Sanyo Chemical Industries, Pestact 3000 (brand name), and a 3rd component As conductive fiber, carbon fiber made from Tohotec Rex company, Using Veswhite HTA (brand name), this was mixed and shape | molded by the single-layer T-die apparatus, and the separator sheet of thickness 1mm was produced. The copolymer resin used in this example is a polyolefin It has polypropylene as a backbone and polyethyleneglycol as a hydrophilic polymer backbone. In addition, content of the conductive fiber was 10 mass% and content of the copolymerization resin was 5 mass%. The molding ability of the single-layer T-die apparatus was at most 10 m / min, and this example was molded at the maximum speed.

(Example 2-2)

Using a multilayer T-die apparatus, a separate sheet having a two-layer structure of a main layer and a surface layer was produced. As a material which comprises a main layer, Sun Aroma Polypropylene and E300A (brand name) were used. The surface layer was formed like what was used in Example 2-1. As for the thickness of each layer, the main layer made 0.85 mm and the surface layer 0.15 mm, and made the thickness in the whole separator sheet 1 mm. The molding ability of the multilayer T-die apparatus was at most 10 m / min, and was molded at the maximum speed in this example.

(Comparative Example 2-1)

The polypropylene and carbon fiber used in Example 2-1 were mixed and molded in a single-layer T-die apparatus in the same manner as in Example 2-1 to prepare a separator sheet having a thickness of 1 mm. Content of carbon fiber was 10 mass%. The forming speed of the separate sheet was 10 m / min.

(Comparative Example 2-2)

A separate sheet was produced in the same manner as in Comparative Example 2-1 except that the molding speed was 4 m / min.

Table 2 shows the compositions and evaluation results of Examples 2-1 and 2-2 and Comparative Examples 2-1 and 2-2 described above. In addition, in Table 2, regarding the productivity, the case where the separate sheet was molded at the maximum speed of the molding apparatus is indicated by "(circle)" and the case where the case where the molded sheet was molded at a speed of about half or less of the maximum speed is indicated by "x".

Table 2

Furtherance Molding speed (m / min) Surface specific resistance (Ω) productivity Example 2-1 10% by mass of polypropylene carbon fiber 5% by mass of copolymer resin (PP / polyethylene glycol) 10 10 ⁶ ○ Example 2-2 Surface polypropylene Carbon fiber 10% by mass Copolymer 5% by mass (PP / polyethylene glycol) Main layer Polypropylene 10 10 ⁶ ○ Comparative Example 2-1 10% by mass of polypropylene carbon fiber 10 10 more than ¹⁰ ○ Comparative Example 2-2 10% by mass of polypropylene carbon fiber 4 10 ⁶ ×

In Examples 2-1 and 2-2, even if molding is performed at the maximum capability of the T-die apparatus, molding can be performed without a problem, and the surface resistivity is also 10 ⁷ Ω or less, and a separate sheet having sufficient antistatic performance. Could get On the other hand, in the comparative example, when trying to improve the productivity by increasing the molding speed, the network structure of the carbon fiber was not sufficiently formed, and as a result, the surface specific resistance was also high, and thus it was not possible to have the required antistatic performance (Comparative Example 2 -One). Conversely, if a network structure of carbon fibers is formed and the surface intrinsic resistance value is set to 10 ⁷ Ω or less, the molding speed is lowered and the productivity is lowered (Comparative Example 2-2). As mentioned above, since it contained the copolymer resin which has polyolefin type | system | group strength and hydrophilic polymer bone strength, it turned out that the network of carbon fiber is formed satisfactorily and the separator sheet which has stable antistatic performance can be manufactured with high productivity.

As described above, according to the present invention, in a separate sheet (tier sheet) containing a polyolefin resin, a copolymer resin having both a polyolefin skeleton and a hydrophilic polymer is mixed, and the copolymer resin is compatible with a polyolefin resin. In order to disperse | distribute, the stable antistatic performance can be obtained over the whole sheet | seat, even without using conductive fiber. Moreover, it can manufacture easily and low cost like shape | molding a normal polyolefin resin sheet.

Claims (9)

A non-electrolytic separator sheet containing a polyolefin resin, comprising a composition in which a copolymer resin having at least both a polyolefin skeleton and a hydrophilic polymer skeleton is mixed with the polyolefin resin described above, wherein the surface specific resistance is 10 ^11. Ω or less, non-electrostatic separate sheet characterized by the above-mentioned. In the non-electrostatic separator sheet containing a polyolefin resin, the above-described polyolefin resin includes at least a copolymer resin having both a polyolefin skeleton and a hydrophilic polymer skeleton, and a composition mixed with a conductive fiber material, the surface inherent of A non-static separate sheet characterized by a resistance value of 10 ⁷ Ω or less. The nonelectrostatic separator sheet according to claim 2, wherein the conductive fiber material is carbon fiber. The nonelectrostatic separator sheet according to claim 1 or 2, wherein the polyolefin resin and the polyolefin skeleton described above are polypropylene. The nonelectrostatic separator sheet according to claim 1 or 2, wherein the hydrophilic polymer backbone is polyethylene glycol. The nonelectrostatic separator sheet according to claim 1 or 2, wherein the content of the copolymerized resin is 3 to 20% by mass. The nonelectrostatic separator sheet according to claim 1 or 2, wherein an antimicrobial agent is added to at least the surface. The non-electrolytic separator sheet according to claim 1 or 2, comprising a main layer made of a polyolefin resin and a surface layer made of the above-described composition laminated on one side or both sides of the main layer. The nonelectrostatic separate sheet according to claim 1 or 2, wherein the thickness is in the range of 0.3 mm to 15 mm.