JP6825671B1 - Silicon material shipping bag and silicon material packaging - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag for transporting a silicon material and a packing body for the silicon material, which can be easily opened at the time of packing and can suppress contamination of the silicon material as a content. A bag for transporting a silicon material has first and second side edges, and third and fourth side edges, and has first and second side edges and third and fourth sides. It has a first film that intersects the edges, first and second side edges, and third and fourth side edges, and has first and second side edges and third and fourth side edges. The first to third side edges of the first film and the first to third side edges of the second film are overlapped with each other in a state where the first and second films are overlapped with each other. By fixing the portion, an opening is formed on the side of the fourth side edge that is not fixed, and the first film of the first film is held at a predetermined position in the state where the opening is closed. The tensile force for opening the opening when pulled up in the direction perpendicular to the plane is 1.5 N or less. [Selection diagram] Fig. 1

Description

The present disclosure relates to a shipping bag made of silicon material and a packing body made of silicon material.

Since silicon wafers used in the manufacture of semiconductor products and silicon materials such as polysilicon, which are the raw materials for silicon wafers, are required to have high cleanliness, they are generally packed in a clean bag made of a resin film. It is transported in a state of being. The silicon material is usually packed by opening the opening of the bag using an automatic packing machine. However, the resin films constituting the bag may be stuck to each other due to electrostatic action or the like, and the bag may not be opened by the automatic packing machine, which causes a problem that the production efficiency is lowered. In order to solve such a problem, a bag made of a resin film to which an antistatic agent is added and which can be easily opened by an automatic packing machine has been conventionally proposed (see Patent Document 1).

Japanese Patent No. 6116125

Like the bag disclosed in Patent Document 1, by adding an antistatic agent to the resin film constituting the bag, it is possible to prevent the resin films from sticking to each other, and automatic packing is performed. The bag can be easily opened by the machine. However, the antistatic agent added to the resin film may contaminate the silicon material of the contents.

In view of the above problems, the present disclosure provides a transport bag for a silicon material and a package for the silicon material, which can be easily opened at the time of packaging and can suppress contamination of the silicon material as the content. Is one purpose.

In order to solve the above problems, as one embodiment of the present disclosure, a transport bag made of a silicon material, the first side edge portion and the second side edge portion facing each other, and the third side edge portion facing each other. A first film having a fourth side edge portion and intersecting the first side edge portion and the second side edge portion with the third side edge portion and the fourth side edge portion facing each other. It has one side edge portion and a second side edge portion, and a third side edge portion and a fourth side edge portion facing each other, the first side edge portion and the second side edge portion, and the third side edge portion. The first to third side edges of the first film which are provided with a second film where a portion and the fourth side edge portion intersect with each other and which overlap each other in a state where the first film and the second film are overlapped with each other. By fixing the portion and the first to third side edges of the second film, respectively, an opening is formed on the side of the fourth side edge that is not fixed, and the first of the first films. The first side edge portion and the first side edge portion of the second film are fixed to each other via a first gusset film folded toward the inside of the transportation bag, and the first of the first films. The second side edge portion and the second side edge portion of the second film are fixed to each other via a second gusset film folded toward the inside of the transportation bag, and the first film and the first film are fixed to each other . The two films, the first gusset film, and the second gusset film are laminates in which at least a resin base material layer, a resin layer, and a sealant layer are laminated in this order, and the laminate has an antioxidant. Not included, the sealant layer is located inside the transport bag and holds a predetermined position of the first film of the transport bag with the opening closed to hold the first film of the first film. The tensile force for opening the opening when pulled up in the direction perpendicular to the plane is 1.5 N or less, and the tensile force is in the vicinity of the first side edge portion of the first film. The first position and the fourth position 200 mm away from the center position between the third side edge portion and the fourth side edge portion along the length direction of the first side edge portion toward the third side edge portion. Provided is a transport bag made of a silicon material, which is a value measured using a force gauge when a second position 200 mm away from the side edge side is held and the first film is pulled up in the direction perpendicular to the plane. ..

In the transport bag of the silicon material, the resin base material layer may be made of polyester resin, and the resin base material layer may be made of polyethylene terephthalate (PET), at least the first. The film and the second film may be transparent.

As one embodiment of the present disclosure, there is provided a silicone material packing body including the silicon material transport bag and the silicon material housed in the silicon material transport bag.

According to the present disclosure, it is possible to provide a transport bag for a silicon material and a packing body for the silicon material, which can be easily opened at the time of packing and can suppress contamination of the silicon material as a content.

FIG. 1 is a perspective view showing a schematic configuration in a state where an opening of a transport bag for a silicon material according to the present embodiment is opened. FIG. 2 is a partially enlarged cut end view showing a schematic configuration of one aspect of the packaging material in the present embodiment. FIG. 3 is a partially enlarged cut end view showing a schematic configuration of one aspect of the sealant layer in the present embodiment. FIG. 4 is a partially enlarged cut end view showing a schematic configuration of another aspect of the sealant layer in the present embodiment. FIG. 5 is a perspective view showing a schematic configuration of a package of silicon material according to the present embodiment. FIG. 6 is a perspective view showing a schematic configuration of a silicon material transport bag according to the present embodiment in a closed state. FIG. 7 is a schematic view showing a schematic configuration of a multilayer film manufacturing apparatus for manufacturing a packaging material according to the present embodiment. FIG. 8 is a partially enlarged cut end view showing a schematic configuration of another aspect of the packaging material in the present embodiment.

Embodiments of the present disclosure will be described with reference to the drawings.
In the drawings attached to the present specification, in order to facilitate understanding, the shape, scale, aspect ratio, etc. of each part may be changed or exaggerated from the actual product. The numerical range represented by using "~" in the present specification and the like means a range including each of the numerical values before and after "~" as a lower limit value and an upper limit value. In the present specification and the like, terms such as "film", "sheet" and "board" are not distinguished from each other based on the difference in designation. For example, "board" is a concept that includes members that can be generally called "sheet" or "film".

As shown in FIG. 1, the silicon material transport bag 1 according to the present embodiment is a packaging bag that becomes a substantially rectangular parallelepiped shape (substantially rectangular parallelepiped shape) when expanded, and is a first side film 11 and a second side surface. It is composed of a film 12, a first gusset film 13, and a second gusset film 14. The first side surface film 11, the second side surface film 12, the first gusset film 13 and the second gusset film 14 are all made of the packaging material 30, which will be described later. The transport bag 1 may not have the first gusset film 13 and the second gusset film 14. In this case, the first side surface film 11 and the second side surface film 12 have three side edge portions (first to third side edge portions 111 to 113) so that the first surface 34A of the sealant layer 34 faces each other. , 121-123) may be heat-sealed.
The first side film 11 shown in FIG. 1 has a first side edge portion 111 and a second side edge portion 112 facing each other, and a third side edge portion 113 and a fourth side edge portion 114 facing each other. , The first side edge portion 111 and the second side edge portion 112 have a shape (substantially rectangular shape) in which the third side edge portion 113 and the fourth side edge portion 114 intersect. The second side surface film 12 also has the same shape as the first side surface film 11.

In the transport bag 1, the first surface 34A of each of the sealant layers 34 of the first side surface film 11, the second side surface film 12, the first gusset film 13 and the second gusset film 14 is located on the innermost surface, and the resin base material layer. The other surface 31B side of the 31 (the surface side of the resin base material layer 31 opposite to the surface on which the sealant layer 34 is located) is configured to be located on the outermost surface.

In the transport bag 1 shown in FIG. 1, a first gusset folded with one of two opposing first side edge portions 111 and second side edge portion 112 (first side edge portion 111) of the first side surface film 11. The first heat-sealed portion HS11 formed by superimposing one of the two opposing side edge portions of the film 13 and welding them by heat sealing is formed, and the first side edge portion 111 and the second side of the first side surface film 11 are formed. The second heat-sealed portion HS12 formed by superimposing the other of the edge portion 112 (second side edge portion 112) and one of the two opposing side edge portions of the folded second gusset film 14 and welding them by heat sealing. Is formed. Further, the side edge portion of the first gusset film 13 folded with one of the two opposing first side edge portions 121 and the second side edge portion 122 (first side edge portion 121) of the second side surface film 12. A third heat-sealed portion HS13 formed by superimposing the other and welding by heat sealing is formed, and the other (second side edge portion) of the first side edge portion 121 and the second side edge portion 122 of the second side surface film 12 is formed. A fourth heat-sealed portion HS14 formed by superimposing the 122) and the other side edge portion of the folded second gusset film 14 and welding them by heat sealing is formed. A bottom surface heat-sealing portion HSB1 formed by superimposing the third side edge portions 113 and 123 of the first side surface film 11 and the second side surface film 12 and welding them by heat sealing is formed and faces the bottom surface heat sealing portion HSB1. The fourth side edges 114 and 124 of the first side film 11 and the second side film 12 respectively formed the opening 16 of the transport bag 1 without being heat-sealed.

As shown in FIG. 2, the packaging material 30 constituting each film (first side film 11, second side film 12, first gusset film 13 and second gusset film 14) of the transport bag 1 has one side 31A. It has a resin base material layer 31 having the other surface 31B facing the resin base material layer 31, and a resin layer 32 and a sealant layer 34 which are sequentially laminated on the one side surface 31A side of the resin base material layer 31.

The resin base material layer 31 is made of, for example, a polyester-based resin material such as polyethylene terephthalate (PET) or polybutylene terephthalate (PBT), and may be a single layer of one type of resin material or two types. It may be a laminate of the above resin materials. The resin base material layer 31 may contain a polyamide-based resin material such as nylon (Ny, a registered trademark), but it is preferable that the resin base material layer 31 does not contain the polyamide-based resin material. Caprolactam, which is a residual monomer of the polyamide-based resin material, may contaminate the silicon material as the content. If the resin base material layer 31 contains the polyamide-based resin material, when the transportation bag 1 is opened, Although it cannot be denied that the silicon material may be contaminated by caprolactam that may be contained in the resin base material layer 31, the silicon material that is the content is contained because the resin base material layer 31 does not contain the polyamide-based resin material. The possibility of contaminating it can be reduced.

The resin layer 32 located between the resin base material layer 31 and the sealant layer 34 may be formed by extrusion lamination of a polyolefin such as polyethylene (PE), or the resin base material layer 31 and the sealant layer 34 may be formed by forming the resin base material layer 31 and the sealant layer 34. It may be formed by an adhesive to be adhered. Examples of the adhesive include polyolefins such as polyethylene (PE) and two-component urethane resin adhesives. As the two-component urethane resin adhesive, for example, a two-component urethane resin adhesive in which a main agent (Ru77t manufactured by Rock Paint Co., Ltd.) and a curing agent (H-7 manufactured by Rock Paint Co., Ltd.) are mixed can be used. .. Although FIG. 8 shows a form in which the resin layer 32 is arranged inside the barrier layer 36, it may be arranged outside the barrier layer 36. Although not shown, when the resin layer 32 is formed by an adhesive, it is more preferable that the resin layer 32 is arranged outside the barrier layer 36. When the silicon material transport bag 1 is manufactured using the packaging material 30, the resin layer 32 is arranged outside the transport bag 1 rather than the barrier layer 36. Therefore, the organic adhesive constituting the resin layer 32 is organic. It is possible to prevent the components from moving to the inside of the transportation bag 1. As a result, when the silicon material is contained in the transportation bag 1, deterioration of the silicon material in the transportation bag 1 can be suppressed. The thickness of the resin layer 32 may be, for example, about 1 μm to 5 μm, and preferably about 2 μm to 4 μm. If the thickness of the resin layer 32 formed by the adhesive is thinner than 1 μm, sufficient adhesive strength may not be obtained. On the other hand, if the thickness of the resin layer 32 formed by the adhesive is thicker than 5 μm, the curing reaction takes time, so that the resin layer 32 may contain a large amount of unreacted substances, residual solvent, and the like. Further, the packaging material 30 may have a plurality of resin base material layers 31 and a plurality of resin layers 32. Specific examples of such a packaging material 30 include a resin base material layer 31 made of PET, a resin layer 32 made of an adhesive, a barrier layer 36 made of an aluminum vapor deposition layer, and a resin made of PET. Examples thereof include a packaging material in which a base material layer 31, a resin layer 32 made of PE, and a sealant layer 34 are laminated in this order. In the transport bag 1 made from this packaging material, the sealant layer 34 may be located inside the transport bag 1.

In addition, "inside the barrier layer" means that when the shipping bag 1 of the silicon material is produced using the packaging material 30, it is located inside the transportation bag 1 of the barrier layer 36 of the packaging material 30. Means. On the other hand, "outside the barrier layer" means that when the shipping bag 1 made of a silicon material is manufactured using the packaging material 30, the bag 1 is located outside the barrier layer 36 of the packaging material 30. means.

The thickness of the resin base material layer 31 may be, for example, 18 μm to 40 μm, preferably 20 μm to 25 μm. If the thickness is less than 18 μm, it is difficult to maintain the bag shape of the transport bag 1, and the workability when accommodating the silicon material in the transport bag 1 may deteriorate. If the thickness exceeds 40 μm, the workability may be deteriorated. The transport bag 1 is less likely to be deformed, and when the silicon material is housed in the transport bag 1 and degassed and packed, the followability of the transport bag 1 may decrease.

As shown in FIG. 3, the sealant layer 34 of the packaging material 30 has a first surface 34A and a second surface 34B facing the first surface 34A. In the packaging material 30, the second surface 34B of the sealant layer 34 is located on the resin layer 32 side. The sealant layer 34 shown in FIG. 3 includes a first surface layer 341 located on the first surface 34A side, a second surface layer 342 located on the second surface 34B side, a first surface layer 341, and a second surface layer 342. It is a laminated structure having an intermediate layer 343 sandwiched between the two. As shown in FIG. 4, the sealant layer 34 of the packaging material 30 may be a single-layer structure having a first surface 34A and a second surface 34B.

The sealant layer 34 may contain a heat-sealable resin component, and may contain, for example, a polyolefin, a cyclic polyolefin, a carboxylic acid-modified polyolefin, a carboxylic acid-modified cyclic polyolefin, or the like.

Examples of the polyolefin include polyethylenes such as low-density polyethylene (LDPE), medium-density polyethylene, high-density polyethylene, and linear low-density polyethylene (LLDPE); homopolypropylene and block copolymers of polypropylene (for example, block copolymers of propylene and ethylene). ), Polypropylene such as a random copolymer of polypropylene (for example, a random copolymer of propylene and ethylene); ethylene-butene-propylene tarpolymer and the like.

The cyclic polyolefin is a copolymer of an olefin and a cyclic monomer, and examples of the olefin which is a constituent monomer of the cyclic polyolefin include ethylene, propylene, 4-methyl-1-pentene, styrene, butadiene, and isoprene. .. Examples of the cyclic monomer which is a constituent monomer of the cyclic polyolefin include cyclic alkenes such as norbornene; specific examples thereof include cyclic diene such as cyclopentadiene, dicyclopentadiene, cyclohexadiene, and norbornadiene.

The carboxylic acid-modified polyolefin is a polymer modified by block-polymerizing or graft-polymerizing a polyolefin with a carboxylic acid. Examples of the carboxylic acid used for modification include maleic acid, acrylic acid, itaconic acid, crotonic acid, maleic anhydride, itaconic anhydride and the like.

The carboxylic acid-modified cyclic polyolefin is obtained by copolymerizing a part of the monomers constituting the cyclic polyolefin in place of α, β-unsaturated carboxylic acid or its anhydride, or α, β-with respect to the cyclic polyolefin. It is a polymer obtained by block polymerization or graft polymerization of unsaturated carboxylic acid or its anhydride.

The first surface layer 341 located on the first surface 34A side of the sealant layer 34 may be a layer containing low density polyethylene (LDPE) to which a slip agent is substantially not added, and may be on the second surface 34B side. The second surface layer 342 located may be, for example, a layer containing low density polyethylene (LDPE) to which a slip agent is substantially not added, similarly to the first surface layer 341, and the first surface layer 341 may be used. The intermediate layer 343 sandwiched between the surface layer 342 and the second surface layer 342 may be, for example, a layer containing linear low density polyethylene (LLDPE) to which a slip agent is substantially not added. In the present embodiment, "substantially no slip agent is added" means that a component that actually improves the slipperiness of the surface of the sealant as a slipper actually affects the slipperiness of the surface of the sealant. Means that it is not added in excess of the amount that actually affects the slipperiness of the surface of the sealant. Examples of the slip agent include particles such as calcium carbonate or talc, and surfactants such as a silicone resin or a quaternary ammonium salt compound.

Since the sealant layer 34 is located in the innermost layer of the transport bag 1, volatile components derived from the sealant layer 34 (outgas components derived from the sealant layer 34, etc.) adhere to the polysilicon or silicon wafer as the contents. In addition, there is a risk of causing defects in the semiconductor device manufactured using the silicon wafer. Therefore, it is desirable that the amount of volatile components derived from the sealant layer 34 is as small as possible. In order to reduce the volatile components derived from the sealant layer 34, it is desirable to make the thickness T34 of the sealant layer 34 as thin as possible. Since the thickness T34 of the sealant layer 34 is relatively thin, the volatile components derived from the sealant layer 34 are released to the outside of the film, so that the volatile components derived from the sealant layer 34 can be reduced. On the other hand, if the thickness T34 of the sealant layer 34 is made too thin, the resistance to mechanical properties such as tensile strength is lowered, and the function as a bag for packing the contents may be deteriorated. In this respect, linear low density polyethylene (LLDPE) has higher elasticity and resistance to bending than low density polyethylene (LDPE). Therefore, by using linear low density polyethylene (LLDPE) as the sealant layer 34, the sealant The thickness T34 of the layer 34 can be made relatively thin.

Further, as shown in FIG. 5, since the resin case 51 is housed in the transport bag 1 and then degassed from the transport bag 1 and packed, it is included in the packaging material 30 constituting the transport bag 1. The sealant layer 34 is required to have good followability. In this respect as well, since the linear low density polyethylene (LLDPE) has a relatively high elasticity, the followability of the sealant layer 34 can be improved by using the linear low density polyethylene (LLDPE). ..

If the sealant layer is composed of a single layer of linear low density polyethylene (LLDPE), the indentation elastic modulus of the sealant layer composed of a single layer of linear low density polyethylene (LLDPE) can be adjusted to about 150 MPa to 600 MPa. Therefore, it is considered that the thickness of the sealant layer can be reduced. Further, it can be said that it is preferable that the sealant layer is composed of a single layer of linear low density polyethylene (LLDPE) in consideration of improving the followability of the sealant layer. However, since the pressure during the polymerization of the linear low density polyethylene (LLDPE) is lower than the pressure during the polymerization of the low density polyethylene (LDPE), the linear low density polyethylene (LLDPE) becomes the low density polyethylene (LDPE). In comparison, low-density components are more likely to volatilize. Therefore, if the sealant layer is composed of a single layer of linear low density polyethylene (LLDPE), even if the thickness of the sealant layer can be reduced, the silicon material is contaminated by the volatile components derived from the sealant layer. It is considered that there is a risk of this. Further, since linear low density polyethylene (LLDPE) tends to have lower slipperiness than low density polyethylene (LDPE), if the sealant layer is composed of a single layer of linear low density polyethylene (LLDPE), the sealant It is considered that the slipperiness of the surface of the layer may be lowered. Since it is preferable that the slip agent that may become a foreign substance is substantially not added to the sealant layer 34 used for the transport bag 1, it is preferable to improve the slipperiness by means other than the use of the slip agent. In the present embodiment, the intermediate layer 343 containing the linear low density polyethylene (LLDPE) may be sandwiched between the first surface layer 341 and the second surface layer 342 containing the low density polyethylene (LDPE). Therefore, in the sealant layer 34 of the transport bag 1, the thickness T34 can be made relatively thin, the followability and slipperiness are good, and the linear low density polyethylene (LLDPE) contained in the intermediate layer 343. It is possible to prevent the low molecular weight components from volatilizing.

The sealant layer 34 of the single-layer structure shown in FIG. 4 may include low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE). In the sealant layer 34, the blending ratio of the low-density polyethylene (LDPE) and the linear low-density polyethylene (LLDPE) may be about 50:50 to 70:30. As described above, since the blending amount of the low density polyethylene (LDPE) is larger than the blending amount of the linear low density polyethylene (LLDPE), the abundance of the low density polyethylene (LDPE) is increased on the first surface 34A side of the sealant layer 34. In addition to being able to increase the number, the effect of reducing the thickness T34 of the sealant layer 34 by using linear low density polyethylene (LLDPE), that is, the effect of preventing low molecular weight components from volatilizing is exhibited. When viewed in the thickness direction of the sealant layer 34, the low-density polyethylene (LDPE) and the linear low-density polyethylene (LLDPE) may be present substantially uniformly, and the first surface 34A side and the first surface 34A side and the first Low-density polyethylene (LDPE) may be unevenly distributed on the two sides 34B side.

The thickness T34 of the sealant layer 34 can be appropriately set according to the thickness of the transportation bag 1 made of the packaging material 30, and may be, for example, about 35 μm to 60 μm.

In the embodiment shown in FIG. 3, the first surface layer 341 containing low-density polyethylene (LDPE) and the second surface layer 342 containing low-density polyethylene (LDPE) are arranged with the intermediate layer 343 interposed therebetween, thereby forming a sealant layer. The internal stress on one side of 34 and the internal stress on the other side cancel each other to some extent, and it is possible to prevent the sealant layer 34 from curling too much. Further, in the embodiment shown in FIG. 3, the thicknesses T341 and T342 of the first surface layer 341 and the second surface layer 342 are both thinner than the thickness T343 of the intermediate layer 343. Since the thicknesses T341 and T342 of the first surface layer 341 and the second surface layer 342 are thinner than the thickness T343 of the intermediate layer 343, the sealant layer 34 can be provided with a predetermined followability. The ratio of the thickness T341 of the first surface layer 341 to the thickness T343 of the intermediate layer 343 may be about 1: 1 to 10, preferably about 1: 2 to 3. When the thickness ratio is in the above range, the sealant layer 34 is provided with sufficient followability by the low-density linear polyethylene (LLDPE) contained in the intermediate layer 343, and the indentation elastic modulus of the sealant layer 34 is 300 MPa to 500 MPa. Can be a range. The indentation elastic modulus can be measured by a microhardness tester (product name "PICODETOR HM500", manufactured by Fisher Instruments).

It is known that the seal strength of the sealant can be controlled by the seal temperature at the time of heat sealing, the seal pressure, the seal time, and the like. Generally, the higher the sealing temperature, the higher the sealing strength tends to be. However, if the sealing temperature is too high, the sealant may melt more than necessary, and the sealing strength may be lowered. In the present embodiment, the sealing strength when the first surfaces 34A of the sealant layer 34 are sealed under the heat sealing conditions of a sealing temperature of 150 ° C., a sealing pressure of 0.1 MPa, and a sealing time of 1 second is 30 N / 15 mm or more. However, it is preferably 50 N / 15 mm or more and less than 60 N / 15 mm. When the seal strength is less than 30 N / 15 mm, the heat of the transport bag 1 is heated during the transport of the silicon material packing body 70 packaged in the transport bag 1 composed of the packaging material 30 having the sealant layer 34. The seal portion (for example, the upper surface heat seal portion HST1 or the like (see FIG. 5)) may be peeled off.

As described above, from the viewpoint of making the thickness T34 of the sealant layer 34 relatively thin, it is considered that it is preferable to use linear low density polyethylene (LLDPE) as a constituent material of the sealant layer 34. However, in the sealant layer made of linear low density polyethylene (LLDPE), the sealing temperature required to obtain a predetermined sealing strength becomes relatively high. In this regard, in the present embodiment, since the first surface layer 341 of the sealant layer 34 contains low density polyethylene (LDPE), the sealing temperature required to obtain a predetermined sealing strength can be relatively lowered. it can.

The haze of the sealant layer 34 in the present embodiment may be 25% or less, preferably 20% or less. When the haze of the sealant layer 34 is 20% or less, the visibility inside the transport bag 1 can be improved. Further, before packaging the silicon material in the silicon material transport bag 1, it is possible to confirm whether or not foreign matter is attached to the first surface 34A of the sealant layer 34, thereby preventing contamination of the silicon material. You can also do it. The haze of the sealant layer 34 can be measured according to JIS-K7136 using, for example, a haze meter (product name: HM-150, manufactured by Murakami Color Research Institute).

The sealant layer 34 having the above-mentioned structure can be produced by using a conventionally known film forming method. For example, the sealant layer 34 having the structure shown in FIG. 3 is manufactured by laminating the second surface layer 342, the intermediate layer 343, and the first surface layer 341 by using a coating method such as a die coating method or an inflation method. Can be done. Similarly, the sealant layer 34 having the structure shown in FIG. 4 can be manufactured by using the above-mentioned coating method, extrusion inflation method, or the like.

As described above, the sealant layer 34 has transparency to the extent that the inside of the transport bag 1 can be visually recognized when the silicon material is packaged in the transport bag 1 of the silicon material (see FIG. 1). Therefore, it is desirable that the packaging material 30 having the sealant layer 34 also has transparency to the extent that the inside of the transport bag 1 can be visually recognized. From such a viewpoint, the haze of the packaging material 30 in the present embodiment may be, for example, 30% or less, preferably 25% or less. If the haze of the packaging material 30 exceeds 30%, the visibility inside the transportation bag 1 manufactured from the packaging material 30 deteriorates, or foreign matter is formed on the first surface 34A of the sealant layer 34 in the transportation bag 1. It may be difficult to confirm whether or not it is attached. The haze of the packaging material 30 can be measured according to JIS-K7136 using, for example, a haze meter (product name: HM-150, manufactured by Murakami Color Research Institute).

When the packaging body 70 made of a silicon material is produced from the transportation bag 1 in the present embodiment, usually, the first gusset film 13 and the first gusset film 14 are folded into the first gusset film 13 in a state where a large number of the transportation bags 1 are stacked. The opening 16 is opened by sucking and holding the side film 11 or the second side film 12 by the suction holding portion of the automatic packing machine and lifting it upward. A resin case 51 (see FIG. 5) for storing the silicon material 52 is housed in the transport bag 1 through the open opening 16, and the first side film 11 and the second side film 12 in the opening 16 are respectively accommodated. The upper surface heat-sealed portion HST1 is formed by superimposing and heat-sealing the fourth side edge portions 114 and 124 of the above. In this way, a packing body 70 made of a silicon material can be produced.

In the present embodiment, the surface of the first side surface film 11 or the second side surface film 12 is held at a predetermined position in a state where the opening 16 of the transportation bag 1 is closed. When pulled up in the normal direction (arrow direction D1 shown in FIG. 6), the tensile force for opening the opening 16 is 1.5 N or less. If the tensile force exceeds 1.5 N, the automatic packing machine may not be able to open the opening 16 of the transport bag 1, and the production efficiency of the silicon material packing body 70 by the automatic packing machine is lowered. It ends up. The tensile force may be, for example, a measured value using a force gauge (manufactured by Nidec Symposium, model: FGP0.2).

The tensile force is, for example, a third side in the vicinity of the first side edge portion 111 of the first side surface film 11 and along the length direction of the first side edge portion 111 (arrow direction D2 shown in FIG. 6). The first position P, which is 200 mm away from the center position C between the edge portion 113 and the fourth side edge portion 114 toward the third side edge portion 113, and the vicinity of the first side edge portion 111 of the first side surface film 11. From the center position C between the third side edge portion 113 and the fourth side edge portion 114 along the length direction of the first side edge portion 111 (arrow direction D2 shown in FIG. 6) to the fourth side edge portion 114. It may be a value measured using the force gauge when the first side surface film 11 or the second side surface film 12 is pulled up in the direction perpendicular to the surface while holding the second position Q 200 mm away from the side. ..

According to the transport bag 1 according to the present embodiment, since the tensile force is 1.5 N or less, the opening 16 of the transport bag 1 can be reliably opened by using the automatic packing machine, so that it is automatic. It is possible to suppress a decrease in the production efficiency of the packing body 70 of the silicon material by the packing machine.

Further, in the transportation bag 1 according to the present embodiment, low density polyethylene (LDPE) is contained on the first surface 34A side of the sealant layer 34 located in the innermost layer thereof, and linear on the second surface 34B side. Contains low density polyethylene (LLDPE). The linear low-density polyethylene (LLDPE) constituting the sealant layer 34 makes it possible to make the thickness T34 of the sealant layer 34 relatively thin, improve the followability, and the first surface 34A side of the sealant layer 34. The low density polyethylene (LDPE) contained in the above can prevent the volatilization of low molecular weight components from the linear low density polyethylene (LLDPE). Since the sealant layer 34 has a predetermined transparency, it can be easily confirmed whether or not foreign matter is attached to the first surface 34A of the sealant layer 34 in the transport bag 1.

The transportation bag 1 according to the present embodiment can be manufactured, for example, as follows.
The transport bag 1 can be manufactured, for example, by using the laminated film manufacturing apparatus 60 shown in FIG. 7. As shown in FIG. 7, the laminated film manufacturing apparatus 60 has a first roll 61, a second roll 62, a third roll 63, a T die 64, a fourth roll 65, a fifth roll 66, and a T die 67. The resin material constituting the resin layer 32 is extruded into a film from the T die 64 on one surface 31A side of the resin base material layer 31, and is surface-pressed by the first roll 61, the second roll 62, and the third roll 63. The multilayer film 30'is produced by being cooled. Subsequently, the resin material constituting the sealant layer 34 is extruded into a film from the T die 67 on the resin layer 32 of the multilayer film 30', and is surface-pressed and cooled by the fourth roll 65 and the fifth roll 66. After that, it is subjected to an aging treatment at a predetermined temperature (40 ° C. to 55 ° C.) and a predetermined time (24 hours to 72 hours), and wound into a roll to prepare a raw fabric roll of the packaging material 30. In the present embodiment, the first transport bag 1 is manufactured by using a bag making machine described later by performing the aging treatment for a longer time than the aging treatment time in the conventionally known resin film manufacturing process. The side film 11 and the second side film 12 are easily curled, and air can easily enter through the opening 16 (the opening 16 is easily opened). As a result, the transport bag 1 having the above-mentioned tensile force of 1.5 N or less can be manufactured.

Subsequently, a raw fabric roll for the first side surface film 11, a raw fabric roll for the second side surface film 12, a raw fabric roll for the first gusset film 13, and a raw fabric roll for the second gusset film 14 are prepared. Then, the transport bag 1 can be manufactured by using a conventionally known bag making machine to seal the packaging materials 30 unwound from the raw fabric roll on three sides while superimposing them. When the packaging materials 30 unwound from each raw fabric roll are overlapped and three-way sealed, the tension of the packaging material 30 unwound from the raw fabric roll for the first side film 11 and the original fabric for the second side film 12 By appropriately differentiating the tension of the packaging material 30 unwound from the roll, the first side surface film 11 and the second side surface film 12 are easily curled, and air can easily enter through the opening 16 (the opening 16 is opened). Easy state) The transport bag 1 can be manufactured. In this way, the transport bag 1 having the above-mentioned tensile force of 1.5 N or less can be manufactured.

The embodiments described above are described for facilitating the understanding of the present disclosure, and are not described for limiting the present disclosure. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present disclosure.

In the packaging material 30 constituting the transportation bag 1 according to the present embodiment, the barrier layer 36 may be laminated on one side 31A side of the resin base material layer 31 (see FIG. 8). The barrier layer 36 may be, for example, a thin-film film in which an inorganic oxide such as silica or alumina is vapor-deposited on one surface 31A of the resin base material layer 31 (PET layer). When the packaging material 30 has the barrier layer 36, it is possible to prevent gas or the like that contaminates the surface of the silicon material as the content from entering from the outside of the transportation bag 1. The barrier layer 36 may be a metal vapor deposition film formed by depositing a metal such as aluminum on one surface 31A side of the resin base material layer 31, a metal foil such as aluminum, or the like. When the barrier layer 36 is such a metal vapor deposition film or a metal foil, transparency is not ensured in the transportation bag 1, but the transportation bag 1 can be provided with not only a barrier property but also a light shielding property. Further, in this embodiment, since the sealant layer 34 has a predetermined transparency, it is possible to more easily confirm whether or not foreign matter is attached to the first surface 34A of the sealant layer 34 in the transport bag 1. it can.

In the above embodiment, the transport bags 1 produced by the bag making machine may not be overlapped with each other so that the first side surface film 11 and the second side surface film 12 in the vicinity of the opening 16 are not brought into close contact with each other. , The number of stacked transport bags 1 may be reduced to reduce the load on the transport bag 1 located below the stacked transport bags 1. By doing so, the tensile force of the transport bag 1 can be set to 1.5 N or less.

Hereinafter, the present disclosure will be described in more detail with reference to examples and the like, but the present disclosure is not limited to the following examples and the like.

[Example 1]
Low-density polyethylene (LDPE with substantially no slip agent added, manufactured by Ube Maruzen Polyethylene, product name: UBE polyethylene B128) is used as a constituent material of the first surface layer 341, and low-density polyethylene is used as a constituent material of the intermediate layer 343. Polyethylene (LDPE with virtually no slip agent added, manufactured by Ube Maruzen Polyethylene, product name: UBE polyethylene B128) and linear low density polyethylene (LDPE with virtually no slip agent added, manufactured by Prime Polymer Co., Ltd., Product name: Using a melt mixture of Ultozex 3500ZA (blending ratio = 1: 1 (mass basis)), low-density polyethylene (LDPE with substantially no slip agent added) as a constituent material of the second surface layer 342, Using Ube Maruzen Polyethylene Co., Ltd., product name: UBE polyethylene B128), the sealant layer 34 (first surface layer 341 (thickness: 7 μm), intermediate layer) having the structure shown in FIG. 3 by the multilayer coextrusion inflation film forming method. 343 (thickness: 21 μm), second surface layer 342 (thickness: 7 μm), total film thickness: 35 μm) were prepared.

A resin layer 32 (thickness: 20 μm) made of polyethylene and the sealant layer 34 (thickness: 35 μm) are usually placed on one side 31A side of the resin base material layer 31 (thickness: 25 μm) made of polyethylene terephthalate (PET) in this order. The packaging material 30 was prepared by laminating by the method.

Using the above packaging material 30, a transport bag 1 (see FIG. 1) was prepared using a bag making machine (manufactured by Newlong Machine Works, Ltd.), and 10 transport bags 1 were stacked and placed. The transport bag 1 located at the lowermost position of the 10 transport bags 1 is taken out, the opening 16 is opened, and then the bag 1 is allowed to stand for 1 hour, and the first position P and the second position Q (see FIG. 6) are allowed to stand. Is adsorbed and held, and the tensile force for pulling up the first side surface film 11 in the direction perpendicular to the surface to open the opening 16 is measured using a force gauge (manufactured by Nippon Densan Symposium, model: FGP0.2). did. The tensile force was 1.5N.

[Example 2]
The packaging material 30 and the transportation bag 1 were produced in the same manner as in Example 1 except that the thickness of the resin layer 32 was 22 μm, and the tensile force for opening the opening 16 of the transportation bag 1 was measured. .. The tensile force was 1.2N.

[Comparative Example 1]
Ten transport bags 1 produced in the same manner as in Example 1 were placed on top of each other. After taking out the lowermost transport bag 1 out of the 10 transport bags 1 and allowing it to stand for 1 hour, the first position P and the second position Q (see FIG. 6) are adsorbed and held for the first position. The tensile force for pulling up the side film 11 in the direction perpendicular to the plane to open the opening 16 was measured using a force gauge (manufactured by Nippon Densan Symposium, model: FGP0.2). The tensile force was 3.0 N.

[Comparative Example 2]
Ten transport bags 1 produced in the same manner as in Example 2 were placed on top of each other. After taking out the lowermost transport bag 1 out of the 10 transport bags 1 and allowing it to stand for 1 hour, the first position P and the second position Q (see FIG. 6) are adsorbed and held for the first position. The tensile force for pulling up the side film 11 in the direction perpendicular to the plane to open the opening 16 was measured using a force gauge (manufactured by Nippon Densan Symposium, model: FGP0.2). The tensile force was 1.8N.

[Test Example 1]
The transportation bags 1 (in a state in which 10 sheets are stacked) of Example 1, Example 2, Comparative Example 1 and Comparative Example 2 are set in an automatic packing machine, and the opening 16 of each transportation bag 1 is opened. The silicone material was packed. As a result, no packing error (error due to the opening 16 not opening) occurred in the transport bag 1 of Example 1 and Example 2, but a packing error occurred in Comparative Example 1 and Comparative Example 2. occured. As is clear from this result, if the transport bag 1 has a tensile force of 1.5 N or less measured using a force gauge, the opening 16 of the transport bag 1 can be easily opened by using an automatic packing machine. Since the opening can be made, it is possible to prevent a decrease in the production efficiency of the packaging body 70 made of the silicon material.

[Test Example 2]
A section obtained by cutting the sealant layer 34 of Example 1 into a size of 100 mm × 25 mm was prepared as a test sample, and the test sample was immersed in ethanol at 60 ° C. for 1 week. The volatile components from the test sample immersed in ethanol were analyzed by GC / MS under the following conditions to obtain a mass spectrum.

<GC / MS conditions>
-Gas chromatograph: GCMS-QP2010 (manufactured by Shimadzu Corporation)
-Column: 670-15003-03 (length: 30 mm, inner diameter: 0.25 mm, manufactured by Shimadzu Corporation)
・ Column oven temperature: 50 ℃
・ Injection volume: 1 μL
-Carrier gas: He (57.1 mL / min)
・ Vaporization chamber temperature setting: 300 ℃
・ Measurement mode: Split

As a result of the above, no volatile component was detected in the sealant layer 34 of Example 1. From this, as in the first embodiment, the first portion located on the first surface 34A side contains low density polyethylene (LDPE), and the second portion located on the second surface 34B side is linear low density. It is presumed that the inclusion of polyethylene (LLDPE) can prevent the volatilization of low molecular weight components from the sealant.

[Test Example 3] Indentation elastic modulus A section cut out from the sealant layer 34 of Example 1 in a desired size was prepared as a test sample, and the test sample was subjected to a temperature of 23 ° C. ± 2 ° C. and a humidity in accordance with ISO14577: 2015. The indentation elastic modulus was measured in an atmosphere of 60% RH ± 5% RH. First, an adhesive resin (product name "Aron Alpha (product name" Aron Alpha (product name "Aron Alpha") is applied to a commercially available slide glass (hereinafter referred to as "first slide glass") so that the first surface 34A of the test sample cut into a size of 20 mm x 20 mm faces the upper surface. Fixed via "registered trademark" for general use ", manufactured by Toagosei Co., Ltd.). Specifically, the adhesive resin was dropped onto the central portion of the first slide glass (product name "slide glass (cut-off type) 1-9645-11", manufactured by AS ONE Corporation). At this time, one drop of the adhesive resin was dropped so that the adhesive resin did not spread out from the test sample when the adhesive resin was not spread and spread as described later. After that, the test sample cut out to the above size is brought into contact with the first slide glass so that the first surface 34A side is the upper surface and the adhesive resin is located at the center of the test sample, and the first slide glass and the test sample are brought into contact with each other. The adhesive resin was spread between them and temporarily bonded. Then, another new slide glass (hereinafter referred to as "second slide glass") was placed on the test sample to obtain a laminate of the first slite glass / adhesive resin / test sample / second slide glass. Next, a weight of 30 g or more and 50 g was placed on the second slide glass and left at room temperature for 12 hours. After that, the weight and the second slide glass were removed, and this was used as a measurement sample. Then, this measurement sample was fixed to the measurement stage of a micro-hardness tester (product name: PICODETOR HM500, manufactured by Fisher Instruments) installed in parallel with the vibration isolation table. For this fixing, the four sides of the first slide glass were fixed with tape (product name: cellophane tape (registered trademark), manufactured by Nichiban Co., Ltd.) so that the measurement sample did not move. Next, on the first surface 34A of the test sample, an ultra-micro load hardness tester (Picodenter HM500, manufactured by Fisher Instruments) equipped with a Vickers indenter (a diamond indenter having a regular quadrangular pyramid with a facing angle of 136 °) was attached. The indentation elastic modulus was measured under the conditions of a indentation speed of 0.15 μm / sec, a indentation depth of 3 μm, a holding time of 5 seconds, and a withdrawal speed of 0.15 μm / sec. In one test sample, measurements were taken at at least five different points, and the average of those measurements was taken as the value of the indentation modulus for the sealant under that condition. As a result, the indentation elastic modulus was 453.7 MPa. From this, it is presumed that the sealant layer 34 of Example 1 has elasticity to the extent that it can exhibit sufficient followability in practical use, and has bending resistance.

[Test Example 4] Seal strength The first surfaces 34A of the sealant layer 34 of Example 1 are heat-sealed at each temperature condition of 110 ° C., 120 ° C., 130 ° C., 140 ° C. and 150 ° C., and the heat-sealed portion is included. A heat seal test piece having a width of 15 mm was collected, and the seal strength of the heat seal test piece was determined in accordance with JIS-Z1711. As a result, it was confirmed that in the sealant layer 34 of Example 1, high sealing strength can be obtained at a relatively low temperature.

1 ... Silicon material transport bag 30 ... Packaging material 31 ... Resin base material layer 32 ... Resin layer 34 ... Sealant layer 52 ... Silicon material 70 ... Silicon material packaging

Claims (5)

A shipping bag made of silicone material
It has a first side edge portion and a second side edge portion facing each other, and a third side edge portion and a fourth side edge portion facing each other, and the first side edge portion and the second side edge portion and the said The first film at which the third side edge and the fourth side edge intersect,
It has a first side edge portion and a second side edge portion facing each other, and a third side edge portion and a fourth side edge portion facing each other, and the first side edge portion and the second side edge portion and the said A second film that intersects the third side edge portion and the fourth side edge portion is provided.
In a state where the first film and the second film are overlapped with each other, the first to third side edges of the first film and the first to third side edges of the second film overlap each other. By fixing each of them, an opening is formed on the side of the fourth side edge that is not fixed.
The first side edge portion of the first film and the first side edge portion of the second film are fixed to each other via a first gusset film folded toward the inside of the transportation bag.
The second side edge portion of the first film and the second side edge portion of the second film are fixed to each other via a second gusset film folded toward the inside of the transportation bag.
The first film, the second film, the first gusset film, and the second gusset film are laminates in which at least a resin base material layer, a resin layer, and a sealant layer are laminated in this order. The laminate does not contain an antistatic agent, and the sealant layer is located inside the shipping bag.
When the first film of the transport bag with the opening closed is held at a predetermined position and pulled up in the direction perpendicular to the surface of the first film, a tensile force for opening the opening is applied. , 1.5N or less,
The tensile force is in the vicinity of the first side edge portion of the first film, and is between the third side edge portion and the fourth side edge portion along the length direction of the first side edge portion. When the first position 200 mm away from the center position of the third side edge and the second position 200 mm away from the fourth side edge side are held and pulled up in the direction perpendicular to the surface of the first film. A shipping bag made of silicone material, which is a value measured using a force gauge. The bag for transporting a silicon material according to claim 1 , wherein the resin base material layer is made of a polyester resin. The bag for transporting a silicon material according to claim 1 or 2 , wherein the resin base material layer is made of polyethylene terephthalate (PET). The bag for transporting a silicon material according to any one of claims 1 to 3 , wherein at least the first film and the second film are transparent. The silicon material transport bag according to any one of claims 1 to 4 ,
A packing body of a silicon material including the silicon material housed in the transport bag of the silicon material.

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