JPH08276528A - Packaging clean film and packaging bag using that - Google Patents

Abstract

PURPOSE: To obtain a packaging clean film wherein a degree of cleanness is stabilized at a low cost, and further generated static electricity can be effectively damped by laminating successively a base film layer containing an antistatic layer, a heat seal layer, and a first protective film layer. CONSTITUTION: For a packaging clean film, a base film layer 1, a heat seal layer 2, and a first protective film layer 3 are successively laminated, and a clean surface of the heat seal layer 2 is obtained by peeling off the first protective film 3. Further, antistatic additives are contained in the base film layer 1 and the heat seal layer 2. Antistatic additives of inorganic substance such as a metal powder, a silicon compound, a surface active agent, etc., are added into a resin to be used when the base film layer, the heat seal layer, or the first or second protective film layer is formed, and the antistatic additives are contained by forming their formed film or the coated film, or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to electronic parts, especially dust,
The present invention relates to a packaging clean film that can be suitably used for packaging semiconductor products, magnetic disks, dustproof clothes, and the like that are extremely disliked by dust and the like, and a packaging bag using the same.

[0002]

2. Description of the Related Art For example, semiconductor products such as ICs and LSIs are extremely disliked by dust and the like because they cause disconnection and the like. Therefore, these products are manufactured in a clean room. Has been done. Since the work is carried out in the clean room, when the necessary parts, intermediate products, etc. for manufacturing them are carried into the clean room, dust, dust, etc. are put together with them. It is necessary to be careful as much as possible that the particles adhere and are carried into the clean room. Also, it is necessary to prevent dust and the like from adhering to the finished product. Further, since the manufacturing work is carried out in the clean room, not only dust caused by the worker's own hair falling, but also dust and dust adhering to clothes worn by the worker are considerably concerned. Must be attached. Generally, the above parts, intermediate products, finished products, etc.
Alternatively, clothes or the like worn by workers have conventionally been packaged using a packaging material manufactured in a clean room and washed with ultrapure water for distribution and transportation. It is a thing.

[0003]

However, as described above, manufacturing the packaging material in the clean room requires a large-scale manufacturing apparatus and is complicated, and the manufacturing cost is significantly high. There is a problem that Moreover, since the cleaning device has to be provided for cleaning with ultrapure water after manufacturing, it is further complicated. Further, even if it is washed with ultrapure water as described above, there is a problem that the cleanness of the cleanliness of the filling package is insufficient depending on the degree of washing. Further, when the contents are packaged with the packaging material, static electricity or the like is generated during the transfer, and the static electricity or the like may affect the contents or products in the vicinity thereof. Therefore, an object of the present invention is to provide a packaging clean film that is low in cost, has a stable cleaning degree, and is capable of effectively attenuating static electricity generated, and a packaging bag made of the same. Is.

[0004]

Means for Solving the Problems As a result of earnest research to solve the above problems, the present inventor has found that extrusion lamination, dry lamination, coextrusion lamination, T-die coextrusion molding, Multi-layer lamination sheet by a normal lamination method such as inflation coextrusion molding.
Of the laminate sheet, an antistatic agent is contained in each layer constituting the laminate sheet, and the laminate sheet is
After peeling one or two layers of film, the non-peeling surface is dust-free and a clean surface is exposed, and using this surface, electronic products that are extremely reluctant to dust, dirt, etc. The present invention has been completed by discovering that an extremely clean package can be produced by packaging the above.

That is, according to the present invention, a base film layer, a heat seal layer and a first protective film layer are sequentially laminated and a clean heat layer is formed by peeling off the first protective film layer. Packing clear that provides the surface of the toseal layer
And a base film layer as described above
The present invention relates to a clean film for packaging, characterized in that the toe seal layer contains an antistatic agent.

The present invention also provides a second protective film layer,
A base film layer, a heat seal layer, and a first protective film layer are sequentially laminated, and a clean base film layer and a heat layer are formed by peeling off the first and second protective film layers. A clean film for packaging from which each surface of the toseal layer can be obtained, wherein the base film layer, the second protective film layer and the heat seal layer further contain an antistatic agent. The present invention relates to a packaging clean film characterized by the following.

Furthermore, the present invention relates to a packaging bag using the above-mentioned packaging clean film.

[0008]

According to the present invention described above, a multilayer lamination sheet is formed by a conventional laminating method such as extrusion lamination, dry lamination, coextrusion lamination, T-die coextrusion molding, and inflation coextrusion molding. -By manufacturing the sheet, dust, dust, etc. present between the layers of the laminate sheet are trapped in the film by heating and melting the film during lamination, or by using an adhesive or the like. In the case of laminating, it may be trapped in the adhesive layer, and if one or two film layers of the laminate sheet are peeled off after laminating, the surface thereof is dust-free and is not cleaned. The surface can be exposed, whereby a clean film for packaging can be manufactured. Further, according to the present invention, the influence of static electricity or the like on the contents can be prevented by incorporating an antistatic agent in each layer constituting the laminate sheet.

The present invention described above will be described in more detail below. First, in the present invention, the base film layer, the heat
Explaining the materials constituting the tosile layer, the first and second protective film layers, etc., examples of the materials include low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, Polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer-resin, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer,
Polyolefin resin such as methylpentene polymer, polybutene polymer, polyvinyl chloride resin, polyvinylidene chloride resin, polystyrene resin, polyacrylic resin, polyacrylonitrile resin, polyester resin, polyamide resin, polyurethane resin Resin, polyaminoplast resin such as urea or melamine, alkyd resin, unsaturated polyester resin, diallylphthalate
Resin, phenol resin, epoxy resin, polyimide resin, polycarbonate resin, polyvinyl alcohol resin, saponified ethylene-vinyl acetate copolymer, fluorine resin, vinylon resin It is possible to use a film or sheet of a known resin such as polyacetal resin, or a film-like material thereof. In the present invention,
The above-mentioned film or sheet may be unstretched or may be stretched uniaxially or biaxially. The thickness is arbitrary, but is preferably about 5 to 300 μm. Furthermore, in the present invention, in addition to the above-mentioned film or sheet, for example, cellophane, synthetic paper, a metal foil such as aluminum or a vapor-deposited film,
A vapor deposition film of metal oxide such as silicon oxide can also be used.

Thus, in the present invention, as the material constituting the base film layer, since this layer has a basic function as a packaging material, for example, strength,
It is preferable to have properties such as weather resistance and heat resistance. For example, among the above films or sheets, polypropylene resin, polyester resin, polyamide resin,
Film or sheet of resin such as polycarbonate resin
Can be used.

Further, the heat seal layer is formed by facing the layers and heat-sealing the layers when manufacturing the packaging bag.
The bag is manufactured by constructing the bag part. Thus, the material constituting it is one having a heat-sealing property among the above-mentioned films or sheets, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear low chain Density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, methylpentene polymer, polybutene polymer, etc. Polyolefin resin, polyvinyl chloride resin, polystyrene resin,
A film or sheet of resin such as polyacrylic resin or polyacrylonitrile resin can be used.

Next, in the present invention, as a material constituting each of the first and second protective film layers, a base film layer or a heat seal layer surface is used in the production of a packaging clean film. Is protected from dust and the like, and has a function of peeling and exposing a clean, clean base film layer and heat seal layer surface during bag making. Therefore,
Examples of the material forming the protective film layer include:
It can be used by selecting from the above-mentioned films or sheets. In particular, in the present invention, each protective film layer is basically selected from a film or sheet having a property of being peelable after being laminated with the above-mentioned base film layer or heat seal layer. It is desirable to use. For example, it is desirable to use a combination of those having a certain degree of adhesiveness but having no mutual affinity or compatibility. In the present invention, a peelable layer may be provided between the two, if necessary. As the above-mentioned peelable layer, for example, using the above-mentioned resins as vehicles,
A coating film made of a composition obtained by adding a plasticizer, a silicone, a surfactant, a stearate, a polyethylene wax, a metallic soap, a release agent such as a fatty acid amide, and the like to the composition can be used.

Further, in the above-mentioned present invention, the antistatic agent has a problem that, for example, there is a problem such as damage of electronic parts such as IC parts due to the generation of static electricity, and therefore the electrified state is not caused. , Specifically, for example,
Inorganic substances such as metal powder and carbon, silicone compounds, and one or more antistatic agents such as surfactants can be mixed and used. In the present invention, as a method of incorporating the above-mentioned antistatic agent into each layer such as a base film layer, a heat seal layer and a protective film layer, for example, a base film layer, a heat seal layer, a protective layer One or two or more of the above-mentioned antistatic agents are added to the resin constituting the film layer, and further, a composition obtained by optionally adding and mixing other additives is coated or produced. It can be made into a film and contained in each layer.

Next, in the present invention, the constitution of the packaging clean film produced by using the above-mentioned materials will be explained. 1, 2, and 3 are schematic cross-sectional views showing a few examples of the packaging clean film according to the present invention. In FIG. 1, a base film layer 1, a heat seal layer 2 and a first protective film layer 3 are sequentially laminated,
A cleansing film for packaging in which a clean surface of the heat seal layer 2 is obtained by peeling off the first protective film layer 3, further comprising the above-mentioned base film layer 1 and heat sheet. A clean film A ₁ for packaging in which an antistatic agent is contained in the reel layer.

Further, FIG. 2 shows the second protective film layer 3
1, a base film layer 1, a heat seal layer 2 and a first protective film layer 3 are sequentially laminated, and the first and second protective film layers 3 and 31 are peeled off for cleaning. A clean film for packaging in which the respective surfaces of the base film layer 1 and the heat seal layer 2 are obtained, further comprising the base film layer 1, the second protective film layer 31 and the heat seal layer. This is a packaging clean film A ₂ in which each of the rule layers 2 contains an antistatic agent.

Further, FIG. 3 shows an example of a packaging clean film in which the second protective film layer is composed of two or more protective film layers, and specifically, the third protective film layer 3
2, the second protective film layer 31, the base film layer 1, the heat seal layer 2 and the first protective film layer 3 are sequentially laminated, and each of the first, second and third layers is laminated. A packaging clean film, in which the respective surfaces of the clean base film layer 1 and the heat seal layer 2 are obtained by peeling off the protective film layers 3, 31, 32, which further comprises the base film layer. It is a packaging clean film A _{3 in} which an antistatic agent is contained in each of the first, second and third protective film layers 31, 32 and the heat seal layer 2.

Next, in the present invention, a method for producing the above-mentioned packaging clean film will be described. First,
As a method for laminating the base film layer, the heat seal layer, and the first protective film layer, the above-mentioned resins and the like are used, and ordinary laminating methods such as extrusion laminating are used.
, Dry lamination (including solventless type, wax hot melt type, etc.), wet lamination, coextrusion coating lamination, T die method coextrusion molding, inflation method coextrusion molding etc. Laminate method, or roll coat, spray coat, gravure roll coat, flow coat, river
The layers can be laminated by using a normal coating method such as a roll coat or an extrusion coat. Thus, these methods can be applied alone or in any combination of the methods.

In the above-mentioned lamination, for example, an organic titanium type AC agent, an isocyanate type AC agent (urethane type),
AC agent for polyethylene mine type AC agent such as LAMINATE
Alternatively, polyurethane adhesives, polyester adhesives, epoxy adhesives, acrylic adhesives, wax adhesives, water-soluble adhesives composed mainly of starch, gelatin, casein, polyvinyl alcohol, etc., polyvinyl acetate emulsions. It is possible to use various adhesives such as emulsion adhesives such as acrylic emulsion and solventless adhesives that are ultraviolet or electron beam curable.

Further, in the present invention, in the above-mentioned lamination, it is possible to use the above-mentioned resins and the like as a main component and to add various auxiliaries such as a plasticizer, a stabilizer, Antioxidants, light stabilizers, colorants, lubricants, flame retardants, fillers and the like can be optionally added and used.

Next, in the present invention, a base film layer,
A method of incorporating an antistatic agent into the heat seal layer or the first or second protective film layer will be described. As described above, the base film layer, the heat seal layer or the first protective film layer. , Or in the resin used when forming the second protective film layer, one or more of an antistatic agent such as metal powder, an inorganic substance such as carbon, a silicone compound, and a surfactant. Using the composition obtained by adding the above and optionally other additives, and employing the above-described laminating method, coating method, or the like, the formed film or coating -An antistatic agent can be contained by forming a coating film or the like.

Next, in the present invention, a method for producing the packaging bag of the present invention using the packaging clean film produced above will be described. FIG. 4 is a schematic sectional view of a packaging bag manufacturing apparatus showing an example of manufacturing the packaging bag according to the present invention. First, as shown in FIG. 4, the packaging bag manufacturing apparatus includes a cleaning chamber 100 that has been cleaned to approximately class 100 (0.5 μm), and this cleaning chamber is maintained at a positive pressure. There is. On the upstream side of the clean chamber 100, there are provided a pair of paper feed units 110, 110 on which the packaging clean film according to the present invention is wound.

In the above, an example of using the packaging clean film A ₂ shown in FIG. 2 as the packaging clean film will be described. Thus, FIG. 5 is a cross-sectional view schematically showing a packaging bag B ₂ using the packaging clean film A ₂ . As shown in FIG. 5, the packaging clean film A ₂ comprises a second protective film layer 31, a base film layer 1, a heat seal layer 2 and a first protective film layer 3 in order. Surfaces of the base film layer 1 and the heat seal layer 2 which are laminated and clean by peeling off the first protective film layer 3 and the second protective film layer 31. In addition, an antistatic agent is contained in the second protective film layer 31, the base film layer 1, and the heat seal layer 2 described above.

First, a pair of packaging clean films A ₂ and A ₂ are prepared, and at the inlet of the cleaning chamber 100, the packaging clean films A ₂ and A _{2 are used} to prevent electrification. Release rolls 120 and 1 for peeling off the second protective film layer 31 containing the agent and the first protective film layer 3, respectively.
20 are provided. The second protective film layer 31 containing the antistatic layer peeled from the packaging clean films A ₂ and A ₂ and the first protective film layer 3 are provided outside the cleaning chamber 100. The first and second protective film layers 3 and 31 arranged on one side are wound around the respective winding rolls 130, 130, 131 and 131.

A peeling roll 12 is provided in the clean room 100.
On the downstream side of 0 and 120, peeling rolls 120 and 120 are used.
A pair of clean film for packaging
A₂, A ₂Pressing rolls 170 that press the two together,
170 is provided. Further, the pressing roll 17
Downstream of 0 and 170, a pair of packaging cleanfills.
Mu A₂, A₂Seal both side edges of the
Along the flow direction seal device 140 and its width direction
Width-direction sealing device 150 for sealing, and its width-direction
A cutting device 160 for cutting into pieces is sequentially arranged.

In the present invention, the packaging bag is manufactured by first peeling the packaging clean films A ₂ and A ₂ shown in FIG. 6 from the pair of paper feed units 110 and 110. 12
0, 120. Next, peeling rolls 120, 1
20, a pair of packaging clean films A ₂ , A _2
2 to the second protective film layer 3 containing an antistatic layer
1 and the 1st protective film layer 3 are peeled off. The first and second protective film layers 3 and 31 peeled off above,
Each of the winding rolls 130, 130, 131, 131 is wound up. Next, in the peeling rolls 120 and 120, the pair of packaging clean films A ₂ and A ₂ from which the protective film layers 3 and 31 have been peeled off are superposed on each other and sent to the clean chamber 100. . The pair of packaging clean films A ₂ and A ₂ sent to the clean room 100 are
They are pressed against each other by pressing rolls 170, 170, and then a pair of packaging clean films A ₂ , A _2
2 , a pair of packaging clean films A ₂ and A ₂ are sealed along the flow direction by a flow direction sealing device 140, so that the pair of packaging clean films A ₂ and A ₂ are sealed. _2, the flow direction in the outer peripheral portion of the a ₂ sheets - le portion 50 is formed. After that, the widthwise sealing device 150 seals the pair of packaging cleaning films A ₂ , A ₂ along the widthwise direction of the outer peripheral end portions to form the widthwise sealing portion 50. It Next, a pair of packaging clean films A ₂ , A ₂
Is cut by the cutting device 160 one by one in the width direction, thus manufacturing a packaging bag B ₂ in which one of the outer peripheral ends is open and the seal portions 50 are formed on three sides. I can do it.

In the above-mentioned manufacturing method, a pair of packaging clean films A ₂ and A ₂ are sealed on four sides by the flow direction sealing device 140 and the width direction sealing device 150. After that, the center of the seal portion 50 is cut by the cutting device 160, and the seal portion 50 is cut in four directions without an opening.
And a packaging bag having no opening is provided with an opening by cutting a part thereof when filling the content, and filling the content from here. The package may be manufactured by sealing. Further, in the present invention, the form of the seal for producing the packaging bag is, for example, a known seal such as a flat seal, a gusset seal, a seal for attaching a palm, a seal for attaching an envelope, and the like. A seal form can be adopted.

The packaging bag B ₂ produced above is a pair of packagings in which the respective protective film layers are peeled off just before the cleaning chamber 100 and the clean base film layer and the heat seal layer are exposed. It is made of a clean film for use, and the inside and outside of the bag are kept clean. Therefore,
The packaging bag B ₂ is then put together, stored in a separately prepared clean large bag, and shipped. At the shipping destination, the packaging bag B ₂ is used to store the contents C ₂ such as semiconductor products such as IC and LSI.

By the way, after storing contents, C ₂ to packaging bag B _2, the opening is - can be prepared Le has been packaging. Then, this package is conveyed to a predetermined location, but in this case, the contents may move in the packaging bag and static electricity may be generated. However, since the packaging bag according to the present invention contains the antistatic material in the base film layer and the heat seal layer, static electricity in the packaging bag is removed through the bag material. It can be released to the side, so that the contents are not affected by static electricity.

In the above example, the packaging clean film A ₂ shown in FIG. 2 is used, and the pair of packaging clean films A ₂ , A ₂ to the first protective film layer 3 and the The protective film layer 31 of No. 2 is peeled off, and each of the protective film layers 3 and 3 is removed.
A pair of packaging clean films A ₂ and A ₂ from which 1 is peeled off
Is an example in which the heat seal layer surfaces are opposed to each other and are superposed on each other and sent to the cleaning chamber 100, and the packaging bag B ₂ is manufactured from these. In the present invention, although not shown, instead of the above example, first, only the first protective film layer 3 is peeled off from the pair of packaging clean films A ₂ , A ₂ shown in FIG. 2 for cleaning. On the other hand, a pair of packaging clean films A ₂ and A ₂ for exposing the heat seal layer surface and, without peeling off the second protective film layer, are provided on the heat shield layer.
The toe seal layer surfaces are made to face each other and are superposed on each other and sent to the clean room 100, and the pair of packaging clean films A ₂ and A ₂ sent to the clean room 100 are treated in the same manner as described above. Seal part 50 in the flow direction and seal part 50 in the width direction
And further cut one by one in the width direction, so that one of the outer peripheral ends is open and the seal portion 50 is formed on three sides, and the second protective film layer is formed. The packaging bag B ₂ having the same can be manufactured. Then, the packaging bag B ₂ is then put together, stored in a separately prepared clean large bag, and shipped.
In shipping destination, the packaging bag B _2, for example, IC, L
A content C ₂ such as a semiconductor component such as SI is stored, and the opening is sealed to produce a package having a second protective film layer. Further, the package is put on distribution,
After that, when the package is opened and the parts or the like that are the contents are used, the second protective film layer is peeled off when the package is carried into the clean room, so that the package This has the advantage that the surface of the base film layer is exposed and has a clean surface, so that it can be carried into the clean room as it is. In the above, the contents such as parts may be filled and packaged while making the bag.

Next, another example of the packaging bag according to the present invention will be described. As the manufacturing apparatus, the above-mentioned apparatus is used, and as the packaging clean film, the one shown in FIG.
The packaging clean film A ₁ shown in FIG. Figure 7
FIG. 3 is a schematic cross-sectional view showing the structure of a packaging bag B ₁ manufactured using the packaging clean film A ₁ . As shown in FIG. 7, the packaging clean film A ₁ comprises a base film layer 1, a heat seal layer 2, and a first protective film layer 3.
Are sequentially laminated. In the packaging clean film A ₁ , the first protective film layer 3 is peeled off to expose the surface of the clean heat seal layer 2, and the base film layer 1 and the heat seal layer are further exposed. 2 contains an antistatic agent. At the time of manufacturing, the peeling roll 12
With 0 and 120, only the first protective film layer 3 is peeled off from the packaging clean film A ₁ . According to this embodiment, the clean surface of the heat seal layer 2 is exposed, and the content C ₁ is packaged on this surface, so that dust, dust, etc. can be avoided, and the packaging is performed. Since the bag B ₁ contains an antistatic agent in the base film layer 1 and the heat seal layer, the static electricity in the bag B ₁ for packaging goes outward through the bag material. It is possible to escape, so that the contents C ₁ are not affected by static electricity.

Further, another example of the packaging bag according to the present invention will be described. As the manufacturing apparatus, the above-mentioned apparatus is used, and as the cleaning film for packaging, the one shown in FIG.
The packaging clean film A _{3 shown in} is used. FIG.
Is a packaging bag A using the packaging clean film A _3.
FIG. 4 is a schematic cross-sectional view showing the configuration of ₃ . As shown in FIG. 8, the packaging clean film A ₃ has a third protective film layer 32, a second protective film layer 31, a base film layer 1, a heat seal layer 2, and a first protective film layer 32. The protective film layer 3 has a structure in which the protective film layers 3 are sequentially laminated. Thus, in the above, the third protective film layer 32, the second protective film layer 31, the base film layer 1, and the heat seal layer 2 are used.
Contains an antistatic agent, and the second and third protective film layers 31 and 32 containing the antistatic agent and the first protective film layer 3 are peeled off to form an antistatic layer. The surface of the base film layer 1 and the surface of the heat seal layer 2 which are contained therein can be obtained. Additional packaging chestnut - When using a pair of down film A ₃ to produce a packaging bag B _3, first, third containing antistatic layer
The protective film layer 32 and the first protective film layer 3 are peeled off to expose the respective surfaces of the second protective film layer 31 containing the antistatic agent and the heat seal layer 2 for cleaning. And then the packaging bag B ₃ ′ is manufactured. The packing bag B ₃ ′ obtained above is filled with the content C ₃ from the opening and sealed to manufacture a package. Thus, the above-mentioned package is conveyed to a semiconductor clean room for manufacturing a semiconductor manufacturing apparatus through a usual conveying route, and immediately before the conveyance, a second protective layer containing an antistatic layer is provided. By peeling off the film layer 31, the packaging bag A _{3 according} to the present invention can be manufactured. All of the above-mentioned packaging bags according to the present invention include an antistatic layer in the base film layer and the heat seal layer, so that static electricity in the packaging bag is a bag material. It can be released to the outside through this, so that the contents are not affected by static electricity. Also, the above examples are a few examples of the present invention, and the present invention is not limited thereby.

[0033]

EXAMPLES Next, the present invention will be described in more detail with reference to examples. Example 1 A 12 μm thick polyester film prepared by kneading a polymer surfactant was coated with a polyether urethane adhesive, and then a 12 μm thick silicon oxide vapor-deposited polyester film was formed. Dry lamination was performed so that the deposited film was in contact with the adhesive surface. Next, an anchor agent was applied to the polyester film surface of the above-mentioned polyester film having a silicon oxide vapor-deposited film, and low density polyethylene in which 0.5% by weight of a nonionic surfactant was kneaded was used to obtain a thickness of 60 μm. The unstretched polypropylene film of was extruded and laminated. Next, a medium density polyethylene film having a thickness of 60 μm was extruded and laminated using low density polyethylene without applying an anchoring agent to the other surface of the above polyester film having a thickness of 12 μm. An amphoteric surfactant was previously kneaded into the medium density polyethylene film extruded and laminated as described above. As a result, a packaging clean film having the following constitution was obtained. Antistatic agent-containing medium-density polyethylene film 60 μm / low-density polyethylene film 20 μm / antistatic agent-containing polyester film 12 μm / adhesive layer 5 μm / polyester film having silicon oxide vapor deposition film 12 μm / anchor agent layer 0.5 μm
m / Low-density polyethylene film containing antistatic agent 40μ
m / unstretched polypropylene film 60 μm Next, in a clean room, while peeling the unstretched polypropylene film of the packaging clean film obtained above, a bag is formed with the peeled surface as an inner surface. Got

Example 2 An anchor agent was applied to the surface of a 12 μm-thick polyester film prepared by kneading a polymer surfactant obtained by graft-polymerizing a surfactant on an acrylic skeleton, and low density polyethylene was used. An unstretched polypropylene film having a thickness of 60 μm was extruded and laminated. Next, the above thickness 1
Anchor on the other surface of the 2 μm polyester film
Without applying the agent, a low density polyethylene was used to extrude and laminate a medium density polyethylene film having a thickness of 60 μm. Further, a cationic surfactant was previously kneaded in the medium density polyethylene film extruded and laminated as described above. As a result, a packaging clean film having the following constitution was obtained. Antistatic agent-containing medium-density polyethylene film 60 μm / low-density polyethylene film 20 μm / antistatic agent-containing polyester film 12 μm / anchor agent layer 0.8 μm / low-density polyethylene film 50 μm / unstretched polypropylene film 60 μm. In the frame, the unstretched polypropylene film of the packaging clean film obtained above was peeled, and the peeling surface was used as an inner surface to form a bag, thereby obtaining a packaging bag.

Comparative Example 1 An anchor was formed on the surface of a polyester film having a thickness of 12 μm.
Applying agent, using low density polyethylene, thickness 60
An unstretched polypropylene film of μm was extruded and laminated. Next, without applying an anchor agent to the other surface of the above-mentioned 12 μm-thick polyester film,
A medium density polyethylene film having a thickness of 60 μm was extruded and laminated using low density polyethylene to obtain a packaging clean film having the following constitution. Medium density polyethylene film 60 μm / low density polyethylene film 20 μm / polyester film 12 μm / anchor agent layer 0.8 μm / low density polyethylene film 50
μm / unstretched polypropylene film 60 μm Next, in a clean room, while peeling the unstretched polypropylene film of the packaging clean film obtained above,
Bag production was carried out with the peeled surface as the inner surface to obtain a packaging bag.

Experimental Example 1 Using the packaging bags obtained in Examples 1 and 2 and Comparative Example 1 described above, a hard tissue case having a plurality of hard disks housed therein was used. After inserting, the air inside the packaging bag was replaced with the dry clean nitrogen gas, and then the opening of the packaging bag was heat-sealed while vacuuming the nitrogen gas to perform vacuum packaging. The protective film on the outside of the hard disk pack obtained above was peeled from the package. At that time, the electrostatic charges of the surface of the package and the peeled protective film were measured. The experimental environment temperature and humidity were 25 ° C and 5
It was 0% RH. Table 1 below shows the charged voltage (kV) of the package, and Table 2 shows the charged voltage (kV) of the peeled protective film.

[0037]

[Table 1]

[0038]

[Table 2]

As is clear from the above experimental examples, the packaging bag using the packaging clean film according to the present invention has a remarkably low electrification voltage and can prevent dust and dirt from adhering to it. It is excellent in that it can be done.

[0040]

According to the present invention described above, extrusion lamination, dry lamination, and coextrusion lamination.
Of a multilayer laminated sheet by a normal laminating method such as extrusion, T-die coextrusion molding, inflation coextrusion molding, etc., so that dust, dust, etc. existing between the respective layers of the lamination sheet can be removed. When it is trapped in the film by heating and melting the film during lamination, or when laminating using an adhesive or the like, it may be trapped in the adhesive layer. -Peeling off one or two film layers of the sheet, the surface is dust-free,
It is possible to produce a packaging clean film capable of exposing a clean surface. Thus, by packaging the contents using such a packaging clean film, a clean packaging body can be obtained, and in a layer constituting the packaging clean film. By soliciting an antistatic agent, it is possible to prevent the adhesion of dust and the like and prevent the influence of static electricity and the like on the contents. The packaging clean film and the packaging bag according to the present invention are parts, products, etc. that are insensitive to dust, dust, etc., for example, parts, products such as silicon wafers, magnetic discs, semiconductors, photomasks, pellicles, or the like. It can be optimally used as a packaging material used for packaging clothes and the like that are required when manufacturing products. The packaging clean film and the packaging bag according to the present invention have low manufacturing costs, stable cleaning properties, and static electricity generated during transportation can be effectively attenuated. It is possible to prevent objects and products near these packages from being affected by static electricity. Furthermore, since the static electricity generated when the protective film layer is peeled off can also be effectively attenuated, the contents, as well as the products existing near these packages and the peeled protective film, are affected by the static electricity. Can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing the structure of a packaging clean film A ₁ .

FIG. 2 is a schematic cross-sectional view showing the structure of a packaging clean film A ₂ .

FIG. 3 is a schematic cross-sectional view showing the structure of a packaging clean film A ₃ .

FIG. 4 is a schematic sectional view of a packaging bag manufacturing apparatus showing an example of manufacturing a packaging bag.

FIG. 5 is a cross-sectional view schematically showing a packaging bag B ₂ using the packaging clean film A ₂ .

FIG. 6 is a cross-sectional view schematically showing a packaging bag B ₁ using the packaging clean film A ₁ .

FIG. 7 is a cross-sectional view schematically showing a packaging bag B ₃ using the packaging clean film A ₃ .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base film layer 2 Heat seal layer 3 1st protective film layer 31 2nd protective film layer 32 3rd protective film layer

Claims (7)

[Claims] 1. A base sheet film layer, a heat seal layer, and a first protective film layer are sequentially laminated, and a clean heat sheet is obtained by peeling off the first protective film layer.
A packaging clean film capable of obtaining the surface of a package layer, wherein the base film layer and the heat seal layer further contain an antistatic agent. the film. 2. A second protective film layer, a base film layer, a heat seal layer and a first protective film layer are sequentially laminated, and the first and second protective film layers are peeled off. By cleaning the substrate film layer and heat
A clean film for packaging from which each surface of the toseal layer can be obtained, wherein the base film layer, the second protective film layer and the heat seal layer further contain an antistatic agent. A clean film for packaging, which is characterized in that 3. The packaging according to claim 2, wherein the second protective film layer comprises two or more protective film layers, and each protective film layer further contains an antistatic agent. Clean film for. 4. A base film layer, a heat seal layer and a first protective film layer are sequentially laminated, and the base film layer and the heat seal layer contain an antistatic agent, Further, by removing the first protective film layer, a pair of packaging clean films, in which a clean surface of the heat seal layer is obtained, are peeled off from the first protective film layer, and heat is applied. A packaging bag, characterized in that the toe seal layer surfaces are overlapped with each other facing each other, and the outer peripheral end is heat-sealed while leaving the opening. 5. A second protective film layer, a base film layer, a heat seal layer and a first protective film layer are laminated in this order, and a second protective film layer, a base film layer and a heat protective layer. -A pair of packaging clean films in which the toe-sealing layer contains an antistatic agent, and a clean surface of the heat-sealing layer can be obtained by peeling off the first protective film layer. The first protective film layer is peeled off to release the heat.
A stacking bag is formed by stacking the tosile layer surfaces so that they face each other, and the outer peripheral end portion is heat-sealed while leaving the opening portion, and the packaging bag is formed from the opening portion of the packaging bag. By filling and packaging the contents, sealing the opening to form a package, and peeling the second protective film from the package, a clean surface of the base film layer can be obtained. A packaging bag characterized by the above. 6. A second protective film layer, a base film layer, a heat seal layer, and a first protective film layer are sequentially laminated, and a second protective film layer, a base film layer and a heat shield layer. -The tosyl layer contains an antistatic agent, and by further peeling off the above-mentioned first and second protective film layers, clean surfaces of the base film layer and the heat-sealing layer can be obtained. A pair of clean film for packaging is laminated by peeling off the respective first and second protective film layers so that the heat seal layer surfaces face each other, and the outer peripheral edge is left with the opening left. -A packaging bag having a tossed construction. 7. The method according to claim 5 or 6, wherein the second protective film layer is composed of two or more protective film layers, and each protective film layer contains an antistatic agent. A packaging bag to do.