AU2012202849B2

AU2012202849B2 - Bag

Info

Publication number: AU2012202849B2
Application number: AU2012202849A
Authority: AU
Inventors: Michiaki Fujita; Yuji Kawaguchi
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2011-05-16
Filing date: 2012-05-16
Publication date: 2016-02-25
Anticipated expiration: 2032-05-16
Also published as: AU2012202849A1; CN102785825A; TW201247499A; CN203094685U; TWI617496B

Abstract

Abstract A bag 10 0A, is made of film, being to be filled with powdered material and housed in a box-shaped container main body 30 having an opening in a top surface and a lid 40 for covering the opening. The bag includes: a gusset 11 at a bottom; an upper part having a flat bag shape; and a bottom end having a narrower outer width than an upper end, and the bag has straightness of tear in a width direction of the bag. According to this bag, the usability of the bag made of film, being to be housed in a box-shaped container, is improved with a simpler configuration. KAO-52 Fig. 1 13-1 enlarged view (a) (b) e 10

Description

1 Title of the Invention Bag Field of the Invention 0001] The present invention relates to a bag to be filled with powdered material such as powder detergent and to be used as a refill bag in a box-shaped container. Background of the Invention 00021 A box-shaped container made of paperboard material such as paperboard and a plastic sheet is used as a container used for powdered material of granules or powder such as powder detergent (Patent Literature 1) . The box shaped container is normally disposed after use of the content. 00031 In contrast, it is known to repeatedly use a box shaped container by filling the content in a refill bag and placing the content together with the bag in the box-shaped container from the perspective of resource savings. Proposed is making a refill bag of thick paper, providing a removal tab protruding outward to an upper part of a side thereof and a guide tape for removal to a part corresponding to the removal tab to improve the ease of opening the refill bag, and providing a folding line at the bottom of the bag so as to be able to fold the bag compactly upon disposal (Patent Literature 2). KAO-52 2 [0004] Moreover, it is known as those promoting resource savings to fill the content in a self-standing bag having a chuck (Patent Literature 3). Proposed as such a combination of the refill bag and the box-shaped container is providing a retaining section for retaining an opening edge of the refill bag to the main body of the box-shaped container for housing the bag to prevent the opening of the refill bag from closing up (Patent Literature 4). [0005] Patent Literature 1: JUM-A-H06-1221 Patent Literature 2: JUM-A-H06-32364 Patent Literature 3: JP-B-4043229 Patent Literature 4: JP-A-2010-143635 Summary of the Invention (0005a] The present invention provides a bag for powdered material, the bag being made of film and being arranged or configured to be housed in a box-shaped container main body having an opening in a top surface and a lid for covering the opening, the bag comprising: a gusset at a bottom thereof; an upper part having a flat bag shape; a bottom end having a narrower outer width than an upper end; and an opening start section in a seal section at a side, wherein the bag can be opened linearly in a width direction of the bag from the opening start section, and wherein a length from a bottom edge of an interior of the bag to the opening start section is substantially the same size as a depth of the container main body.

2a [0005b] Comprises/comprising and grammatical variations thereof when used in this specification are to be taken to specify the presence of stated features, integers, steps or components or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof. [00061 Provided is a bag made of film, being to be filled with powdered material and housed in a main body of a box shaped container having an opening in a top surface and a lid for covering the opening, including: a gusset at a bottom thereof; upper part having a flat bag shape; and a bottom end having a narrower outer width than an upper end, and having a straightness of tear in a width direction of the bag.

3 Brief Description of the Drawings 0007] Fig. 1 is a perspective view of a bag 10 0 A of an embodiment, which is filled with powdered material; Figs. 2(1), 2(2) and 2(3) are a front view, a view taken along line A-A, and a view taken along line B-B, which are of the bag 100A that is not filled with powdered material, respectively; Fig. 3A is a perspective view of a box-shaped container housing the bag 10OA; Fig. 3B is a perspective view of a state where a lid of the box-shaped container housing the bag 1OoA is open; Fig. 4 is a perspective view of a state when the bag 10 0 A housed in the container main body is being opened; Figs. 5(1) and 5(2) are a perspective view and a front view of the bag 1OoA after being opened, housed in the container main body, respectively; Fig. 6 is a perspective view of a bag 10 0 B of an embodiment, which is filled with powdered material; Figs. 7(1), 7(2) and 7(3) are a front view, a view taken along line A-A, and a view taken along line B-B, which are of the bag 10 0 B that is not filled with powdered material, respectively; Figs. 8(1), 8(2), 8(3) and 8(4) are a front view, a view taken along line A-A, a view taken along line B-B, and a bottom view which are of the bag 100C that is not filled with powdered material, respectively; KAO-52 4 Fig. 9 is a perspective view of a bag 100C of an embodiment, which is filled with powdered material; Fig. 10(1) is a perspective view of a container main body including a retaining section of the bag at an opening section and Fig. 10(2) is a perspective view of a state where the bag is housed in the container main body and an opening edge is retained; Fig. 11 is a perspective view of a bag 10 1 A of an embodiment, which is filled with powdered material; Figs. 12(1), 12(2) and 12(3) are a front view, a view taken along line A-A, and a view taken along line B-B, which are of the bag 10 1 A that is not filled with powdered material, respectively; Fig. 13 is a perspective view of a state where a lid of a container main body housing the bag 10 1 A is open; Fig. 14 is a perspective view of a state when the bag 10 1 A housed in the container main body is being opened; Fig. 15 is an explanatory view of an opening line of the bag 10 1 A; Fig. 16A is an explanatory view of a method for manufacturing the bag 10 1 A; Fig. 16B is an explanatory view of the method for manufacturing the bag 10 1 A; Fig. 16C is an explanatory view of the method for manufacturing the bag 10 1 A; Fig. 16D is an explanatory view of the method for manufacturing the bag 10 1 A; KAO-52 5 Fig. 16E is an explanatory view of the method for manufacturing the bag 10 1 A; Fig. 16F is an explanatory view of the method for manufacturing the bag 10 1 A; Fig. 17A is a partial front view of a bag 10 1 B of an embodiment, which is not filled with powdered material; Fig. 17B is a partial front view of a bag 101C of an embodiment, which is not filled with powdered material; Fig. 17C is a partial front view of a bag 10 1 D of an embodiment, which is not filled with powdered material; Fig. 18 is a perspective view of a bag 10 1 E of an embodiment, which is filled with powdered material; Figs. 19(1), 19(2) and 19(3) are a front view, a view taken along line A-A, and a view taken along line B-B, which are of the bag 10 1 E that is not filled with powdered material, respectively; Fig. 20 is a perspective view of a bag 10 2 A of an embodiment, which is filled with powdered material; Figs. 21(1), 21(2) and 21(3) are a front view, a view taken along line A-A, and a view taken along line B-B, which are of the bag 10 2 A that is not filled with powdered material, respectively; Fig. 22 is an explanatory view of an arrangement state of a notch in an easy-to-open process area; Fig. 23 is a perspective view of a state where a lid of a box-shaped container housing the bag 10 2 A is open; Fig. 24 is a perspective view of a state when the bag KAO-52 6 10 2 A housed in the container main body is being opened; Fig. 25 is an explanatory view of a tear line of the bag 10 2 A; Fig. 26A is an explanatory view of a method for manufacturing the bag 10 2 A; Fig. 26B is an explanatory view of the method for manufacturing the bag 10 2 A; Fig. 26C is an explanatory view of the method for manufacturing the bag 10 2 A; Fig. 26D is an explanatory view of the method for manufacturing the bag 10 2 A; Fig. 26E is an explanatory view of the method for manufacturing the bag 10 2 A; Fig. 26F is an explanatory view of the method for manufacturing the bag 10 2 A; Fig. 27A is a partial front view of a bag 10 2 B of an embodiment, which is not filled with powdered material; Fig. 27B is a partial front view of a bag 102C of an embodiment, which is not filled with powdered material; Fig. 27C is a partial front view of a bag 10 2 D of an embodiment, which is not filled with powdered material; Fig. 28A is a front view of a modification of the bag 10 2 A of the embodiment; Fig. 28B is a front view of a modification of the bag 10 2 B of the embodiment; and Fig. 28C is a front view of a modification of the bag 10 2 B of the embodiment. KAO-52 7 Detailed Description of the Invention 00081 The cost of manufacturing the above refill bag made of thick paper increases if a process of a folding line is performed on the bag body and a removal tab and a guide tape for removal for opening are provided. 00091 Also when the refill bag is made of film, if the bag has a chuck, the manufacturing cost increases. The refill bag may be made of film and have a notch formed on an edge thereof to tear and open the refill bag; however, the tear line is not stabilized simply by providing a notch. Moreover, if the refill bag and the box-shaped container are used in combination, it is complicated to work for retaining the opening edge of the refill bag to the box-shaped container after the refill bag is opened and, further, even if the opening edge of the refill bag is retained to the box-shaped container, if a deviation between the opening plane of the bag and the opening plane of the box-shaped box is large, powdered material may enter a gap between the bag and the box-shaped container when the powdered material is taken out from the box-shaped container with a measuring spoon or the like. 0010] Then problems to be solved by the invention is to provide the bag made of film, being housed in a box-shaped container for use as a refill bag of powdered material, KAO-52 8 being simply set in the box-shaped container in an easy-to use state with the widely open opening, at low cost. 0011] In order to cope with the above problems, the inventor has found that the above problems can be solved by forming a bag to be housed in a box-shaped container as a bag for refilling powdered material such that the bag turns to a reverse taper shape in a state of being filled with the powdered material and has straightness of tear in the width direction thereof, and the inventor has accomplished the present invention. 00121 In other words, provided is a bag made of film being to be filled with powdered material and housed in a main body of a box-shaped container having an opening in a top surface and a lid for covering the opening, the bag including: a gusset at a bottom thereof; an upper part having a so-called flat bag shape, having front side and rear side of the bag made of seats overlapped and sealed each other without a gusset; and a bottom end having a narrower outer width than an upper end, and having straightness of tear in a width direction of the bag. 00131 In particular, following embodiments of the present invention are provided: KAO-52 9 an embodiment including an opening start section in a seal section at the side, wherein a length from a bottom edge of the interior of the bag to the opening start section is substantially the same size as a depth of the container main body; an embodiment including an opening start section in a seal section at the side, and a film reinforcing member extending in the width direction of the bag, in other words in the vertical direction compared with direction of depth of the bag, and being adhered to the film on the upper end side of the bag than the opening start section; and an embodiment including an easy-to-open process area extending in the width direction of the bag in the upper part of the bag, wherein an upper end edge or lower end edge of the easy-to-open process area overlaps with a lower end edge of a top seal of the bag or the easy-to-open process area overlaps with the lower end edge of the top seal. 00141 According to the bag of the present invention, the bag has the shape including a gusset at the bottom, a flat bag shape in the upper part, and the outer width that is narrower at the bottom end than at the upper end, and accordingly, the bag as a whole turns to a reverse taper shape (that is, when if the bag is lifted with the top part of the bag, the width of bag narrows gradually toward lower end) when filled with powdered material and therefore it is easy to place the bag in the container main body, and the KAO-52 10 bag is stable after placed in the container main body. In other words, a gap between the outer surface of the bag and the container main body is hardly created, and the bag is stuck in the container main body. 00151 Moreover, if the bag filled with the powdered material and sealed is placed in the container main body, and is opened from the opening start section while being placed in the container main body, it becomes unnecessary to hold the weight of the content in the bag with the hand upon opening. Moreover, the bag has straightness of tear in the width direction; accordingly, it is possible to open the bag linearly with ease in the width direction of the bag. Since the content strongly presses the bag against the container main body, the opening of the bag is maintained large and wide open. Therefore, it becomes easy to take out the content with a measuring spoon or the like. Moreover, this makes it unnecessary to provide, to the container main body, a slit, a hole, a holding member and the like for retaining the bag to the inner wall of the container main body so as to open the bag widely in the container main body. 00161 In particular, according to the aspect of the bag of the present invention where the length from the bottom edge of the interior of the bag to the opening start section is substantially the same size as the depth of the container main body, after the bag filled with the powdered material KAO-52 11 and sealed is opened in the container main body, the opening plane of the bag and the opening plane of the container main body are substantially in the same plane. Accordingly, the open end of the bag does not unnecessarily protrude from the opening plane of the container main body. Therefore, if the container main body is covered with a lid, it is possible to close the container main body so as to seal it with the lid, without creating a gap between the open end of the container main body and the lid. Hence, it is possible to prevent the content from becoming moist even if the box-shaped container with the lid closed is stored in a highly humid place such as a bathroom. Moreover, since the opening plane of the bag and the open end plane of the container main body are substantially in the same plane, it is possible to prevent the content from entering between the bag and the container main body when the content is taken out with a measuring spoon or the like. 00171 According to the aspect of the bag of the present invention including the film reinforcing member adhered to the film on the upper end side of the bag than the opening start section, if the bag filled with the powdered material and sealed is placed in the container main body, the bag is torn along the film reinforcing member on operation of tearing from the opening start section, and accordingly, the bag can be opened especially easily. [ 00181 KAO-52 12 Moreover, according to the aspect of the bag of the present invention including an easy-to-open process area extending in the width direction of the bag in the upper part, if the bag filled with the powdered material is placed in the container main body, on operation of tearing the bag from the opening start section in a side seal in the vicinity of the top seal, the easy-to-open process area is first torn in the width direction of the bag, and the bag is subsequently torn along the lower end edge of the top seal. Accordingly, it is possible to easily open the bag to the full width. 0019] Hereinafter, examples further describe and demonstrate embodiments of the present invention with reference to the drawings. The same reference numerals denote the same or equivalent components in the drawings. The examples are given solely for the purpose of illustration and are not to be construed as limitations of the present invention. 00201 Fig. 1 is a perspective view of a bag 10 0 A of an embodiment of the present invention, the bag 10 0 A being made of film and being filled with powdered material. Figs. 2(1), 2(2) and 2(3) are a front view, a view taken along line A-A, and a view taken along line B-B, which are of the bag 10 0 A that is not filled with powdered material, respectively. Moreover, Fig. 3A is a perspective view of a box-shaped KAO-52 13 container 1 housing the bag 10 0 A filled with powdered material, and Fig. 3B is a perspective view of a state where a lid 40 of the box-shaped container 1 is open. 00211 As shown in Figs. 2, the bag 10 0 A is made by folding one rectangle film sheet so as to form a gusset 11 folded internally at the bottom, forming side seals 12 at both sides by heat sealing and the like, forming a top seal 13 having a wide seal width at the upper end, and forming a hem seal 14 in a folding section at the bottom. In this case, it is preferable that a seal width Li of the top seal 13 be equal to or longer than 10 mm from the perspective of improving ease of a pinch when the seal width Li is pinched to open from a notch 16. 00221 The side seals 12 at both sides each include an oblique seal section 12a inclined relative to a bottom edge BL of the bag 10 0 A in an area of the gusset 11. The gusset 11 and front film, and the gusset 11 and rear film are sealed respectively at the oblique seal section 12a. An angle 0 (Fig. 2A(1))between an edge of the oblique seal section 12a and an extended line of the bottom edge BL is preferably 40 to 50', and more preferably 45'. Hence, an outer shape of the bottom of the bag 10 0 A turns to a rectangle having bottom edges BL as two vicinities of the rectangle. Accordingly, it is possible to fit the outer shape of the bag 10 0 A well along an inner shape of a KAO-52 14 container main body 30 when the bag 10 0 A is housed in the container main body 30 of the box-shaped container 1. 00231 An upper part of the bag 10 0 A is sealed into a flat bag shape with the top seal 13 and the side seals 12. Therefore, an outer width W1 of a bottom of the bag to be filled with the content is narrower than an outer width W2 of an upper end of the bag filled with the content. If the bag 10 0 A is filled with the powdered material, the bag as a whole turns to a reverse taper shape having a narrower width at the lower end than at the upper end, and it is possible to make the area of the bag's bottom formed by the gusset 11 equal to or less than the area of the bottom surface of the container main body 30. Therefore, when the bag 10 0 A in the container main body 30 is replaced by another bag, it is possible to easily insert the bag 10 0 A in the container main body 30. Moreover, the bag 10 0 A includes the hem seal 14 formed at the bottom. Accordingly, when the bag 10 0 A is filled with the powdered material being the content, the gusset 11 at the bottom of the bag 10 0 A expands in a thickness direction of the bag 10 0 A and therefore the self standing ability of a refill bag as a single unit is stabilized. 00241 The side seals 12 extend in a vertical direction at both sides of the bag 10 0 A, and each of the side seals 12 is provided with the notch 16 cut out into a V-shape as an KAO-52 15 opening start section (an enlarged partial detail (a) of Fig. 1). In the present invention, an I-shape notch(Fig. 1(b)), a U-shape notch(Fig. 1(c)), a Magic Cut® or the like may be formed as the opening start section. 00251 In terms of the locations of notches 16 towards the top seal 13, it is preferable to have a line connecting opening start points (the tips of the notches 16) at both sides directly below a lower end edge of the top seal 13. Here, the term "directly below" indicates being preferably within 10 mm, and more preferably within 5 mm of the lower end edge of the top seal 13. It is sufficient if the distance between the opening start point and the lower end edge of the top seal 13 falls within this range. Hence, both front and rear films are torn along the top seal 13 when the bag 100A is opened from the notch 16. Accordingly, the directions of tear of the front and rear films become the same, and it is possible to easily open the bag 10 0 A in the width direction while keeping the bag 10 0 A in the container main body 30. It is useful to improve straightness of tear especially if the bag 10 0 A is made of a general-purpose film that does not have tear properties. Moreover, even if the bag 10 0 A is formed of a film having tear properties, the front and rear films do not stay together due to the way of applying a force upon tear, and are torn in different levels, or either of the films may jut out, which results in reduction in the usability of the bag KAO-52 16 10 0 A after the bag 10 0 A is opened. However, it is possible to eliminate such inconvenience with the top seal 13 and notch 16 directly therebelow, and significantly improve straightness of tear in the width direction of the bag. 00261 In the embodiment, notches 16 are located in the side seals 12, and a length Hi (Fig. 2) in the vertical direction of the bag from the bottom edge of the interior of the bag 10 0 A to the notch 16 is substantially the same size as a depth H2 (Fig. 5) of the container main body 30 of the box shaped container 1. Here, the bottom edge represents a part at the lowest end of the interior of the bag, which touches the bottom of the box-shaped container 1. Moreover, the meaning that the length Hi from the bottom edge of the interior of the bag 10 0 A to the notch 16 is substantially the same size as the depth H2 of the container main body 30 is that these sizes Hi and H2 are close to the extent that it can be said that the opening plane of the bag 10 0 A and the opening plane of the container main body 30 are in the same plane when the bag 10 0 A is opened from the notch 16. If a difference AH (Fig. 5) between the depth H2 of the container main body 30 and the length Hi from the bottom edge of the interior of the bag 10 0 A to the notch 16 is preferably within ±5 mm, and more preferably 0 mm, the opening plane of the bag 100A and the opening plane of the container main body 30 become flush with each other. [ 00271 KAO-52 17 Moreover, it is preferable that the length Hi from the bottom edge of the interior of the bag 10 0 A to the opening start section such as the notch 16 is equal to or shorter than the depth H2 of the container main body 30, for example, the difference between the depth H2 of the container main body 30 and the length Hi from the bottom edge of the interior of the bag 100A to the opening start section such as a notch 16 (AH = H2 - Hi) be 5 mm to 0 mm. There is a case where if the length Hi from the bottom edge of the interior of the bag 100A to the opening start section such as the notch 16 is excessively larger than the depth H2 of the container main body 30, and if the opening plane of the bag 10 0 A protrudes more than the opening plane of the container main body 30 after the bag body 10 0 A is opened from the opening start section, when the lid 40 is closed on the container main body 30, an open end of the bag 100A is caught between the open end of the container main body 30 and the lid 40 to create a gap between the open end of the container main body 30 and the lid 40. However, it is possible to close the container main body 30 so as to seal the container main body 30 with the lid 40 by positioning the opening plane of the bag 10 0 A at the same level as or lower than the opening plane of the container main body 30 in the vicinity of the opening plane of the container main body 30. Hence, even if the box-shaped container 1 (Fig. 3A) with the lid 40 closed is stored in a highly humid place such as a bathroom, it is possible to prevent the powdered KAO-52 18 material of the content from becoming moist. 00281 Moreover, since the opening plane of the bag 10 0 A is positioned at the same level as or lower than the opening plane of the container main body 30 in the vicinity of the opening plane of the container main body 30, it is possible to prevent the content from entering between the bag 10 0 A and the container main body 30 when the content is taken out with a measuring spoon or the like. 00291 Furthermore, since the opening plane of the bag 10 0 A is positioned at the same level as or lower than the opening plane of the container main body 30 in the vicinity of the opening plane of the container main body 30, it is possible to position the opening plane of the bag 10 0 A after being opened between the opening plane of the container main body 30 and the top surface of the content in the bag 100A. Accordingly, the bag 10 0 A is strongly pressed by the content against the container main body to maintain the opening of the bag 10oA large and wide open, and it becomes easy to take out the content with the measuring spoon or the like. Moreover, the opening plane of the bag 10 0 A is does not protrude from the opening plane of the container main body 30 and, therefore when the lid 40 of the container main body 30 is closed, there is no need to fold the upper end of the bag 100A and it becomes easy to maintain the opening of the bag 10 0 A wide open. KAO-52 19 00301 On the other hand, if the opening plane of the bag 10 0 A is positioned too low relative to the opening plane of the container main body 30, it becomes difficult to open the bag 10 0 A from the opening start section such as a notch 16 in the container main body 30 when the bag 10 0 A is opened. Moreover, there may be a case where the powdered material enters between the bag 10 0 A and the container main body 30 from the gap between the opening edge of the bag 10 0 A and the open end of the container main body 30 and accumulates therein, and the powdered material is solidified by the moisture entered from the gap. However, since the opening plane of the bag 10 0 A and the opening plane of the container main body 30 are substantially flush with each other, it is possible to prevent such a problem. 00311 It is preferable that the circumference of the opening, formed when the bag 10 0 A is opened from the opening start section such as a notch 16, be substantially the same size as the inside circumference of the container main body 30. Hence, as shown in Fig. 5, powdered material P in the bag 10 0 A will spread after the bag 10 0 A is opened, and accordingly, substantially the entire circumference surface of the bag 10 0 A is pressed against the inner wall of the container main body 30. Therefore, the opening shape of the bag 100A is wide and stable, and it becomes easy to take out the powdered material P with a measuring spoon. Here, the KAO-52 20 meaning of "substantially the same size" does not include a case where the upper end opening of the bag 10 0 A falls inward due to the circumference of the upper end opening of the bag 10 0 A being excessively shorter than the inside circumference of the container main body 30 or conversely where the bag 10 0 A has a large slack due to the circumference of the upper end opening of the bag 10 0 A being excessively long. Rather, the meaning is that the circumference of the opening of the bag 10 0 A and the inside circumference of the container main body 30 are substantially the same as each other to the extent that an upper end opening of the bag 10 0 A does not fall inward in the container main body 30 and there is no slack at the upper end of the bag 10 0 A. 00321 Examples of the film forming the bag 10 0 A include polyesters such as polyethylene terephthalate, polyamides such as nylon, olefin films of such as low density polyethylene (LDPE), linear low density polyethylene (L LDPE), oriented polypropylene (OPP), and cast polypropylene (CPP), and the like. The film can be used as a single layer or a laminated film. Among them, a film having the straightness of tear by stretching and the like is preferable. In particular, if a film forming the bag 10 0 A is formed from a laminated film having an outer surface layer, an intermediate layer and an inner sealant layer, or having an outer surface layer and an inner sealant layer, it KAO-52 21 is preferable that the inner sealant layer, the outer surface layer and the intermediate layer each have straightness of tear in the width direction of the bag (the arrow directions in Fig. 4). It is preferable that a film having straightness of tear in the inner sealant layer be a film that an easy-to-cut process is performed on linear low density polyethylene (L-LDPE) or the like. 00331 If a film having straightness of tear is used, the film may be used for the entire bag 10 0 A, or may be used only for the bag's upper part to which tear properties are added. From the perspective of improving the shock resistance of the bottom of the bag against a drop and the like, it is preferable to use a laminated film (OPP, PET, LDPE or L-LDPE) having general properties without the straightness of tear as a film forming the gusset 11 at the bottom of the bag. 00341 Moreover, it is preferable that a film having barrier properties against oxygen, water and the like be used as a film forming the bag 10 0 A in accordance with the powdered material to be filled in the bag 10 0 A. Hence, it is possible to reduce the barrier properties necessary for the container main body 30 itself, and reduce the cost of manufacturing the container main body 30, and also reduce the cost of manufacturing the entire box-shaped container 1. In order to impart the barrier properties to a film forming KAO-52 22 the bag 10 0 A, a film layer having the barrier properties is laminated on the film forming the bag 10 0 A. In addition, a layer that improves printability and a layer that improves sealing properties may be provided for the film forming the bag 10 0 A as necessary. 00351 The film forming the bag 10 0 A is preferably 40 tm or more, more preferably 100 tm or more in thickness so as to be strong to the extent that the bag 10 0 A stands alone even without the content. And it is preferably 200 tm or less, more preferably 150 tm or less. Hence, after the bag 10 0 A is opened, even if the amount of the powdered material in the bag 10 0 A decreases with use of the powdered material and the position at which the powdered material presses the bag 10 0 A against the inner wall of the container main body 30 descends, it is possible to maintain the bag 10 0 A open and maintain the ease of taking out the powdered material. The self-standing ability of the bag 10 0 A can be improved by forming the hem seal 14 at the bottom of the bag 10 0 A as described above. 00361 The bag 10 0 A filled with the powdered material can be preferably used as a refill bag of the box-shaped container 1 shown in Fig. 3A. The use method in this case may include: opening the lid 40 as shown in Fig. 3B, and tearing the bag 10 0 A with the hand in its width direction from the opening start section such as a notch 16 while keeping the KAO-52 23 bag 10 0 A in the container main body 30 as shown in Fig. 4. The upper end of the bag 10 0 A is removed by the tear to the full width. As shown in Fig. 5, the bag 10 0 A left in the container main body 30 is pressed by the powdered material P in the bag 10 0 A against the inner wall of the container main body 30 as shown by the arrows and opens wide. 00371 If the powdered material P in the bag 10 0 A is used up and there is none left, a new bag 10 0 A for a refill filled with the powdered material P and sealed is prepared to be replaced with the used bag 10 0 A. Upon replacement, the bag 10 0 A filled with the powdered material P has a reverse taper shape, and accordingly, it becomes possible to easily insert the bag 10 0 A in the container main body 30. 00381 As described above, the description has been given of the embodiment of the present invention with the bag 10 0 A shown in Fig. 1. However, the present invention can take various aspects. For example, a bag 10 0 B shown in Figs. 6 and 7 has a narrower seal width of the top seals 13 than that of the bag 10 0 A of Fig. 1, and includes a tear guide seal 15 formed directly above the notches 16 and below the top seal 13. The tear guide seal 15 is configured such that the front and rear films of the bag 10 0 B are sealed into a strip shape in the width direction. According to the bag 100B, it is possible to improve straightness of tear in the width direction of the bag by setting a distance preferably KAO-52 24 within 10 mm, and more preferably within 5 mm, with the distance being between the tear guide seal 15 and the opening start section such as a notch 16 directly therebelow, or more specifically between the opening start point of the opening start section and the tear guide seal 15. 00391 It is possible to form the tear guide seal 15 by heat sealing, ultrasonic sealing, high-frequency sealing or the like. Figs. 7(1), 7(2) and 7(3) illustrate a front view, a view taken along line A-A, and a view taken along line B-B, which are of the bag 100B that is not filled with powdered material, respectively. 00401 The bag 10 0 B is processed with a laser on a line connecting the opening start sections such as notches 16 at both sides to improve ease of cut. In Figs. 6 and 7, reference numeral 20 denotes a laser process line on which a laser process is performed. It is preferable that the laser process to form the laser process line 20 merely scratch the surface of the film forming the bag 100B. It becomes easier to open the bag 10oB in the container main body by the laser process. 00411 Moreover, in the bag 10 0 B, the hem seal 14 is omitted. It is possible to cause the bag 100B to stand alone depending on the material of the film even if the hem seal 14 is omitted. KAO-52 25 00421 Similarly to the bag lOoB of Figs. 6 and 7, a bag 100C shown in Fig. 8(1) has a narrower seal width of the top seals 13 than that of the bag 10 0 A of Fig. 1. In an area of the gusset 11 of the bag 100C, the nearer the bottom the seal width of side seals 12 at both sides of the become wider. In contrast, outer width from an upper end to a bottom end of the bag is constant. Fig. 8 (2), 8 (2) and 8 (3) are a view taken along line A-A of (1), a view taken along line B-B, and a bottom view. 00431 According to the bag 100C, net width W3 of a bottom of the bag to be filled with the content is narrower than an net width W4 of an upper end of the bag filled with the content. As shown in Fig. 9, if the bag 100C is filled with the powdered material, the bag turns to a reverse taper shape having a narrower width at the lower end than at the upper end, and it is possible to make the area of the bag's bottom (the area corresponding to the hatching area of Fig. 8(4)) formed by the gusset 11 equal to or less than the area of the bottom surface of the container main body 30. Therefore, when the bag 100C in the container main body 30 is replaced by another bag, it is possible to easily insert the bag 100C in the container main body 30. 00441 A bag 10 1 A shown in Figs. 11 and 12 is a bag in which a strip-shaped film reinforcing member 25 is adhered to the KAO-52 26 surface of each of a pair of front and rear films forming the body of the bag, in the width direction of the bag 10 1 A on the upper end side of the bag than the opening start sections such as notches 16. The bag 10 1 A is similar to the bag 10 0 A in Fig. 1 in the points that: the pair of front and rear film sheets forming the body of the bag is sealed with the side seals 12, the film forming the gusset 11 at the bottom and the film sheet forming the body of the bag are sealed with the hem seal 14, and the upper end is sealed with the top seal 13 having the wide seal width; the side seals 12 at both sides of the bag 10 1 A each include the oblique seal section 12a in the area of the gusset 11; the upper part of the bag 10 1 A is shaped into a flat bag by the top seal 13 and the side seals 12, and accordingly, the outer width W1 of the bag at the bottom is narrower than the outer width W2 of the bag at the upper end of the bag 10 1 A, and if the bag 10 1 A is filled with the powdered material, the bag 10 1 A turns to a reverse taper shape having a narrower width at the lower end than at the upper end as shown in Fig. 9, and the area of the bottom of the bag formed by the gusset 11 is equal to or less than the area of the bottom surface of the container main body 30; the hem seal 14 is formed at the bottom; and the side seal 12 includes the notch 16 cut out into a V-shape , or the like, as the opening start section. 00451 In the bag 10 1 A of the embodiment shown in Figs. 11 KAO-52 27 and 12, the lower end edge of the film reinforcing member 25 overlaps with the lower end edge of the top seal 13. Hence, if the bag 10 1 A is placed in the container main body 30 to be torn from the notch 16 by pinching the top seal 13, the bag 10 1 A can be easily torn linearly along the lower end edge of the film reinforcing member 25. In this case, with regard to a distance Dl between the opening start point of the opening start section (in other words, the tip of a V shape notch 16) and the film reinforcing member 25, the opening start point, the tip of a V-shape notch 16, is preferably within 10 mm, and more preferably within 5 mm directly below the lower end edge of the film reinforcing member 25, or more specifically, of the lower end edge of the film reinforcing member 25 because of further improving ease of opening, as shown in Fig. 11. 00461 It is preferable that a strip width L2 of the strip shaped film reinforcing member 25 be equal to or larger than 3 mm from the perspective of fully obtaining the adhesion effect (Fig. 12). 00471 It is generally known that a tape for reinforcement called a tear tape is adhered to a packaging material made of strong film to open the packaging material made of film. The tear tape tears the packaging material made of film in its tape width. In contrast, the film reinforcing member 25 of the embodiment is different in the point of not tearing a KAO-52 28 film sheet of the bag's body to be opened in the film width of the reinforcing member, but being adhered onto the top seal 13 to cause the film sheet of the bag's body to be torn along the lower end edge of the film reinforcing member 25. 00481 Examples of the film reinforcing member 25 used include those prepared by adhering a film such as OPP (oriented polypropylene), PET, or ONy (oriented nylon) with an adhesive. The film thickness is preferably equal to or less than 80 tm, more preferably equal to or less than 50 tm, and equal to or more 12 tm, from the perspective of improving the straightness of tear of the opening line upon opening from the notch 16 and preventing a difference in level between the sealing bar of a sealing device and the film when the top seal 13 is sealed. On the other hand, it is possible to have the kind and thickness of a film material forming the bag's body and the gusset at the bag's bottom similar to those of the bag 10 0 A in Fig. 1. 00491 Similarly to the bag 10 0 A in Fig. 1, also with regard to the location to form the notch 16 in the side seal 12, it is preferable that the length Hi in the vertical direction from the bottom edge of the bag 10 1 A to the opening start section such as a notch 16 be substantially the same size as the depth H2 of the container main body 30. In particular, it is preferable that the length Hi be equal to or shorter than the depth H2 of the container main body 30, for example, KAO-52 29 the difference between the depth H2 of the container main body 30 and the length Hi from the bottom edge of the bag 10 1 A to the notch 16 (AH = H2 - Hi) be equal to or shorter than 5 mm (5 mm or less, and 0 mm or more) (Figs. 12 and 5). 00501 Moreover, it is possible to obtain an effect similar to that of the bag 10 0 A in Fig. 1 by positioning the opening plane of the bag 10 1 A at the same level as or lower than the opening plane of the container main body 30 in the vicinity of the opening plane of the container main body 30, and making the circumference of the opening formed when the bag 10 1 A is opened from the notch 16 substantially the same size as the inside circumference of the container main body 30. 00511 Figs. 16A to 16F are explanations for a method for manufacturing the bag 10 1 A in the case of forming the body of the bag from a film having the straightness of tear and forming the gusset 11 at the bottom from a film without straightness of tear. 00521 First, as shown in Fig. 16A, a film 110 without the straightness of tear for forming the gusset 11 is folded in two and long band-shaped films 100 having straightness of tear for forming the body of the bag are laminated on the top and underside of the film 110. As shown in Fig. 16B, seals 120 to be the side seals 12 and a continuous seal 140 to be the hem seals 14 are then formed and, and as shown in KAO-52 30 Fig. 16C, a long strip-shaped film reinforcing member 250 is aligned to be placed, and is squeezed with a roller to be stuck thereto. As shown in Fig. 16D, the separation of the side seals 12 of adjacent bags and V-cuts at the bottom and the formation of the opening start sections such as notches 16 are performed thereafter. In this manner, a bag 10 1 X shown in Fig. 16E is obtained, is filled with the powdered material being the content from the upper end opening of the bag 10 1 X, and is then closed by the top seal 13. In this manner, it is possible to obtain the bag 10 1 A (Fig. 11) filled with the powdered material. 00531 The bag 10 1 A filled with the powdered material can be preferably used as a refill bag of the box-shaped container 1 shown in Fig. 3A, similarly to the bag 10 0 A filled with the powdered material. The use method in this case may include: opening the lid 40 as shown in Fig. 13, and tearing the bag 10 1 A with the hand in its width direction from the opening start section such as a notch 16 while keeping the bag 10 1 A in the container main body 30 as shown in Fig. 14. Fig. 15 illustrates the tear line in this case by the broken line. As in the drawing, the bag 10 1 A starts being torn from the tip of the opening start section such as a notch 16 at the start of the tear. However, the tear soon goes along the lower end edge of the film reinforcing member 25, the bag 10 1 A keeps being linearly torn to the full width, and the upper end of the bag 10 1 A is removed. Similarly to the KAO-52 31 opening state of the bag 10 0 A shown in Fig. 5, the bag 10 1 A left in the container main body 30 is pressed by the powdered material P in the bag 10 1 A against the inner wall of the container main body 30 as shown by the arrows, and opens wide. 00541 If the powdered material in the bag 10 1 A is used up and there is none left, a new bag 10 1 A for a refill filled with the powdered material is prepared to be replaced with the used bag 10 1 A. Upon replacement, the bag 10 1 A filled with the powdered material has a reverse taper shape, and accordingly, it becomes possible to easily insert the bag 10 1 A in the container main body 30. 00551 In a bag 10 1 B shown in Fig. 17A, the lower end edge of the film reinforcing member 25 is located between the opening start section such as a notch 16 and the lower end edge of the top seal 13, the upper end edge of the film reinforcing member 25 is located in the top seal 13, and the lower end edge of the top seal 13 is covered with the film reinforcing member 25. 00561 In a bag 101C shown in Fig. 17B, the lower end edge of the film reinforcing member 25 is located between the opening start section such as a notch 16 and the lower end edge of the top seal 13, and the upper end edge of the film reinforcing member 25 overlaps with the lower end edge of KAO-52 32 the top seal 13. 00571 Moreover, in a bag 10 1 D shown in Fig. 17C, the lower end edge of the film reinforcing member 25 is located between the opening start section such as a notch 16 and the lower end edge of the top seal 13, and the upper end edge of the film reinforcing member 25 is located lower than the lower end edge of the top seal 13. 00581 A distance D2 between each of the opening start points of the opening start sections (in other words, the tips of the V-shaped notches 16) of the bags 10 1 B, 101C and 10 1 D and the film reinforcing member 25 is also preferably within 10 mm, and more preferably, within 5 mm. Moreover, among the above bags, the bag 10 1 A in which the lower end edge of the film reinforcing member 25 overlaps with the lower end edge of the top seal 13 is preferable from the perspective of improving tear properties. 00591 In the present invention, the film reinforcing member 25 may be formed only on the surface of one of the pair of films constituting the body of the bag. 00601 A bag 10 1 E of Figs. 18 and 19 is the same as the bag 10 1 A in Fig. 11, except that the gusset 11 is formed of a film forming the body of the bag and the hem seal 14 is omitted. It is possible to cause the bag 10 1 E to stand KAO-52 33 alone depending on the material of the film even if the hem seal 14 is omitted. Figs. 19(1), 19(2) and 19(3) are a front view, a view taken along line A-A, and a view taken along line B-B of the bag 10 1 E that is not filled with the powdered material, respectively. 00611 Similarly to the above-mentioned bag 100B, the bag 10 1 E is processed with a laser on a line connecting the opening start sections such as notches 16 at both sides to improve ease of cut. In Figs. 18 and 19, reference numeral 20 denotes a laser process line on which the laser processing is performed. 00621 A bag 10 2 A in Figs. 20 and 21 includes a strip-shaped easy-to-open process area 21 extending in the width direction of the bag 10 2 A, on each of the pair of front and rear films forming the body of the bag on the upper end side of the bag than the opening start section such as a notch 16. 00631 The bag 10 2 A is similar to the bag 100A in Fig. 1 in the points that: the pair of front and rear film sheets forming the body of the bag is sealed with the side seals 12, the film forming the gusset 11 at the bottom and the film sheet forming the body of the bag are sealed with the hem seal 14, and the upper end is sealed with the top seal 13 having a wide seal width; the side seals 12 at both sides of the bag 10 2 A each include the oblique seal section 12a in KAO-52 34 the area of the gusset 11; the upper part of the bag 10 2 A is shaped into a flat bag by the top seal 13 and the side seals 12, and accordingly, the outer width W1 of the bag at the bottom is narrower than the outer width W2 of the bag at the upper end of the bag 10 2 A, and if the bag 10 2 A is filled with the powdered material, the bag 10 2 A turns to a reverse taper shape having a narrower width at the lower end than at the upper end as shown in Fig. 20, and the area of the bag's bottom formed by the gusset 11 is equal to or less than the area of the bottom surface of the container main body 30; the hem seal 14 is formed at the bottom; the side seal 12 includes the notch 16 cut out into a V-shape, or the like, as the opening start section; and the opening start section is provided directly below the top seal 13, or more specifically, the distance Dl between the opening start point of the opening start section (the tip of the V-shape in the case of the V-shape notch 16 shown in Fig. 20) and the top seal 13 is preferably equal to or shorter than 10 mm, and more preferably equal to or shorter than 5 mm. 00641 Moreover, similarly to the bag 10 0 A in Fig. 1, also in terms of the location to form the notch 16 in the side seal 12, it is preferable that the length Hi in the vertical direction from the bottom edge of the bag 10 2 A to the opening start section such as a notch 16 be the substantially the same size as the depth H2 of the container main body 30. For example, if the difference AH between the KAO-52 35 depth H2 of the container main body 30 and the length Hi from the bottom edge of the bag 10 2 A to the notch 16 (Fig. 5) is preferably within 5 mm, and more preferably 0 mm, and in particular, the length Hi is preferably equal to or shorter than the depth H2 of the container main body 30 (Fig. 21 and Fig. 5). 00651 Moreover, it is possible to obtain an effect similar to that of the bag 10 0 A in Fig. 1 by positioning the opening plane of the bag 10 2 A at the same level as or lower than the opening plane of the container main body 30 in the vicinity of the opening plane of the container main body 30, and making the circumference of the opening formed when the bag 10 2 A is opened in the width direction substantially the same size as the inside circumference of the container main body 30. 00661 In the bag 10 2 A of the embodiment, for example as shown in Fig. 22, the easy-to-open process area 21 can be an area where a plurality of lines of slits 22 intermittently formed in the bag's width direction x is arranged in the vertical direction of the bag. In this case, the slits 22 may be penetrating cuts or non-penetrating cuts of the film forming the bag 10 2 A. Moreover, instead of the slits 22, straight embossments may be provided. 00671 In order to make it possible to easily tear the easy KAO-52 36 to-open process area 21 in the bag's width direction x, preferable measurements are as follows; a length L21 of the slit 22 intermittently provided in the bag's width direction x is preferably equal to or more than 0.5 mm, more preferably equal to or more than 0.7 mm, and preferably equal to or less than 1.0 mm, more preferably equal to or less than 0.8 mm, an interval L22 between the adjacent slits 22 is preferably equal to or more than 0.5 mm, more preferably equal to or more than 0.7 mm, and preferably equal to or less than 1.0 mm, and more preferably equal to or less than 0.8 mm, and an interval L23 between the intermittent lines of the slits 22 is preferably equal to or more than 0.5 mm, more preferably equal to or more than 0.7 mm, and preferably equal to or less than 1.0 mm, more preferably equal to or less than 0.8 mm. Moreover, a width L20 of the easy-to-open process area 21 in the vertical direction of the bag 10 2 A is preferably 5 to 20 mm. 00681 In terms of the kind and thickness of a film itself forming the easy-to-open process area 21, it is possible to use a general film without the special straightness of tear and, for example, it is possible to use a film similar to the film material forming the body and the gusset at the bottom of the bag 100A in Fig. 1. 00691 In the bag 10 2 A of the embodiment, the easy-to-open KAO-52 37 process area 21 and the top seal 13 are adjacent such that an upper end edge 21a of the easy-to-open process area 21 overlaps with a lower end edge 13b of the top seal 13 (Fig. 21). It is possible to significantly improve the straightness of tear in the width direction of the bag 10 2 A by making them adjacent to each other compared with a case where the easy-to-open process area 21 and the top seal 13 are not adjacent to each other and an area on which the easy-to-open process has not been performed is interposed therebetween. When the bag 10 2 A starts being torn from the opening start section such as a notch 16, the bag 10 2 A easily opens to the full width. In this manner, it is possible to easily position the opening plane of the bag 10 2 A at the same level as or lower than the opening plane of the container main body 30 in the vicinity of the opening plane of the container main body 30. 00701 Figs. 26A to 26F are explanatory views of an example of a method for manufacturing the bag 10 2 A. First, as shown in Fig. 26A, a film 111 for forming the gusset 11 is folded in two and band-shaped films 101 for forming the front and rear of the body of the bag are laminated on the top and underside of the film 111. As shown in Fig. 26B, the seals 120 to be the side seals 12 and the continuous seal 140 to be the hem seals 14 are then formed and, as shown in Fig. 26C, the easy-to-open process area 21 is formed. As shown in Fig. 26D, the separation of the side seals 12 of adjacent KAO-52 38 bags, V-cuts at the bottom and the formation of the opening start sections such as notches 16 are performed thereafter. In this manner, the bag 10 2 X shown in Fig. 26E is obtained, is filled with the powdered material being the content from the upper end opening of the bag 10 2 X, and is then closed by the top seal 13. As a result, it is possible to obtain the bag 10 2 A filled with the powdered material as shown in Fig. 26F. 00711 In this manufacturing method, the easy-to-open process area 21 may be formed before the band-shaped front and rear films 101 are laminated. 00721 Similarly to the bag 10 0 A, the bag 10 2 A can be preferably used as a refill bag of the box-shaped container 1 shown in Fig. 3A. The use method in this case may include: opening the lid 40 as shown in Fig. 23, and tearing the bag 10 2 A in its width direction from the opening start section such as a notch 16 by pinching the bag 10 2 A with the hand while keeping the bag 10 2 A in the container main body 30 as shown in Fig. 24. Fig. 25 illustrates the tear line in this case by the broken line. As in the drawing, the bag 10 2 A starts being torn from the tip of the notch 16 at the start of the tear. However, the tear soon reaches the easy to-open process area 21, and the bag 10 2 A is linearly torn there or the tear goes along the lower end edge of the top seal 13. Then, the bag 10 2 A keeps being linearly torn to KAO-52 39 the full width, and the upper end of the bag 10 2 A is removed. Similarly to the opening state of the bag 10 0 A shown in Fig. 5, the bag 10 2 A left in the container main body 30 is pressed by the powdered material in the bag 10 2 A against the inner wall of the container main body 30, and opens wide. 00731 If the powdered material in the bag 10 2 A is used up and there is none left, a new bag 10 2 A for a refill filled with the powdered material is prepared to be replaced with the used bag 10 2 A. Upon replacement, the bag 10 2 A filled with the powdered material has a reverse taper shape; accordingly, it becomes possible to easily insert the bag 10 2 A in the container main body 30. 00741 In the bag 10 2 B shown in Fig. 27A, the easy-to-open process area 21 overlaps with the lower end edge 13b of the top seal 13. In this case, the lower end edge 13b of the top seal 13 is positioned between the upper end edge 21a and a lower end edge 21b of the easy-to-open process area 21. In a bag 102C shown in Fig. 27B, the area to form the top seal 13 corresponds to the easy-to-open process area 21. In a bag 10 2 D shown in Fig. 27C, the lower end edge 21b of the easy-to-open process area 21 overlaps with the lower end edge 13b of the top seal 13. However, the upper end edge 21a of the easy-to-open process area 21 is positioned in an area between an upper end edge 13a and the lower end edge 13b of the top seal 13. KAO-52 40 00751 In this manner, in the bag of the present invention, the upper end edge 21a or the lower end edge 21b of the easy-to-open process area 21 overlaps with the lower end edge 13b of the top seal 13, or the easy-to-open process area 21 overlaps with the lower end edge 13b of the top seal 13. However, in terms of the positional relationship between the easy-to-open process area 21 and the top seal 13, it is preferable to form the top seal 13 and the easy-to open process area 21 in this order from the upper part of the bag, as shown in Fig. 21, from the perspective of airtightness of the bag. 00761 Moreover, in a bag shown in Fig. 28A, as shown in Fig. 21, the lower end edge 13b of the top seal 13 is located adjacently to the upper end edge 21a of the easy-to-open process area 21, and the notch 16 is formed in the easy-to open process area 21. Fig. 28B illustrates a bag in which, as shown in Fig. 27A, the lower end edge 13b of the top seal 13 is positioned between the upper end edge 21a and the lower end edge 21b of the easy-to-open process area 21, and the opening start section such as a notch 16 is formed in the easy-to-open process area 21. Fig. 28C illustrates a bag in which, as shown in Fig. 27A, the lower end edge 13b of the top seal 13 is positioned between the upper end edge 21a and the lower end edge 21b of the easy-to-open process area 21, and the opening start point of the opening start KAO-52 41 section such as a notch 16 corresponds to the extended line of the lower end edge 13b of the top seal 13. Among them, in terms of the positional relationship between the easy-to open process area 21 and the notch 16, it is preferable to form the easy-to-open process area 21 and the notch 16 in this order from the upper part of the bag as shown in Figs. 21, 28A and 28B, from the perspective of openability. 00771 The container main body 30 for housing the above bags can be a cuboid container formed of a paperboard material such as paperboard, a plastic sheet, and a plastic plate. 00781 Moreover, it is sufficient if the lid 40 covers the top surface opening of the container main body 30 and, for example, it is possible to use a lid one side of which is joined to the back of the container main body 30 with a hinge or the like. 00791 In the present invention, it is possible to appropriately combine the above various modifications of the bag. 00801 Other than the above embodiments, the container main body 30 of the box-shaped container 1 may also be provided at the opening with a retaining section for retaining an opening edge of the bag. For example, a folding piece 31 at the opening of the container main body 30 is provided with KAO-52 42 slits 32 as shown in Fig. 10(1) and a part of the folding piece 31 can be used as a retaining section 33. Fig. 10(2) illustrates a state of retaining the opening edge of the bag 10 0 A by pinching it in the retaining section 33. 00811 Examples of the powdered material filled in the above bags include powdered material of granules or powder such as powder detergent, sugar, and salt. If the bulk density of the powdered material is equal to or larger than 700 g/L, the bag can be opened neatly by the action of opening the bag outward. According to the present invention, even if the powdered material is contained in the bag in an amount equal to or more than 800 g, it becomes possible to add a strength to fill up such a fill amount to a film forming the bag and easily open the bag. Experiments 00821 (1) Manufacturing of Box-shaped Container A box-shaped container, similar to the box-shaped container (the container main body with a depth of 130 mm, the bottom surface with a width of 150 mm and a length of 130 mm, and the lid with a depth of 20 mm) shown in Fig. 3A, having the retaining section 33 shown in Fig. 10 was manufactured by use of resin-coated paperboard. On the other hand, a laminated film of a PET front layer and an LLDPE back layer was used as a film material of a bag to manufacture the bag 10 0 A shown in Fig. 1. In this case, the KAO-52 43 length from the bottom edge of the interior of the bag to the notch 16 was changed and, as shown in Table 1, the difference AH between the depth H2 of the container main body 30 and the length Hi from the bottom edge of the interior of the bag 10 0 A to the notch 16 (= H2 - Hi) (Fig. 5) was made different. Moreover, powder detergent (Attack Hyperactive Bio EX manufactured by Kao Corporation) was used as powdered material filled in the bag. 00831 (2) Caking Test The bag was opened from the notch in the container main body of the box-shaped container, and was stored with the lid closed for one month on cycle conditions of 30'C and 40 to 80% RH (the cycle period: 48 hrs.). During the storage, the powdered material was taken out by 50 g with a measuring spoon once a week assuming practical use. After the storage, the solid state of the powdered material was evaluated in the following standards: Evaluation Standards Excellent (A): No caking at all Good (B): No caking Acceptable (C): Small amount of caking was observed but in the degree of no problem in practical use Poor (D): Caked 00841 The evaluation results are shown in the following Table 1. KAO-52 44 Table 1 Experiment Box-Shaped Container [ AH IEvaluation 1 Without Retaining Section 8 mm C 2 Same As Above 5 mm B 3 Same As Above 0 mm A 4 Same As Above -5 mm B 5 Same As Above -8 mm C 6 With Retaining Section -15 mm A 00851 As can be seen from Table 1, if the bag 100A was housed in the box-shaped container without the retaining section, when the difference between the depth H2 of the container main body 30 and the length Hi from the bottom edge of the interior of the bag 100A to the notch 16 (AH = H2 - Hi) (Fig. 5) was within a range of -5 mm to +5 mm, caking hardly occurred and, especially when AH = 0 (in other words, thoroughly flush), no caking occurred. In contrast, when AH was larger than this range, the caking of the powdered material in the bag was observed, and when AH was smaller than this range, the powdered material entered between the bag and the container main body by being taken out and the caking of the powdered material accumulated in the corner of the container main body was slightly observed. 00861 Moreover, if the opening edge of the bag was retained by the retaining section by use of the box-shaped container having the retaining section, the powdered material hardly accumulated between the bag and the container main body by being taken out, and no caking occurred in the bag and KAO-52 45 between the bag and the container main body. Industrial Applicability 0 0 871 The box-shaped container housing the bag of the present invention is useful as a container of powdered material such as powder detergent. 00881 The present invention relates to the above-described embodiments, and encompasses the following aspects. [ 00891 <1> A bag made of film, being to be filled with powdered material and housed in a box-shaped container main body having an opening in a top surface and a lid for covering the opening, including a gusset at a bottom thereof and an upper part having a flat bag shape, and having straightness of tear in a width direction of the bag. <2> The bag according to <1>, wherein a bottom end has a narrower outer width than an upper end. <3> The bag according to <1> or <2>, wherein the bag turns to a reverse taper shape having a narrower width at the lower end than at the upper end, when filled with powdered material. <4> The bag according to any one of <1> to <3>, comprising an opening start section in a seal section at a side, and wherein a length from a bottom edge of the interior of the bag to the opening start section is substantially the same KAO-52 46 size as a depth of the container main body. <5> The bag according to <4>, wherein the length from the bottom edge of the interior of the bag to the opening start section is equal to or shorter than the depth of the container main body. <6> The bag according to <5>, wherein a difference between the depth of the container main body and the length from the bottom edge of the interior of the bag to the opening start section is equal to or shorter than 5 mm. <7> The bag according to any one of <1> to <6>, comprising an opening start section in a seal section at a side, wherein a distance between an opening start point of the opening start section and a lower end edge of a top seal for sealing an upper part of the bag, or a distance between an opening start point of the opening start section and a lower end edge of a tear guide seal sealing the front and rear films of the bag into a strip shape in the width direction below the top seal, is within 10 mm, for having straightness of tear in the width direction. <8> The bag according to any one of <1> to <7>, including: an opening start section in a seal section at a side; and a film reinforcing member extending in the width direction of the bag and being adhered to a film on the upper end side of the bag than the opening start section, for having straightness of tear in the width direction. <9> The bag according to any one of <1> to <7>, including KAO-52 47 an easy-to-open process area extending in the width direction of the bag in the upper part of the bag, and an upper end edge or lower end edge of the easy-to-open process area overlapping with a lower end edge of a top seal of the bag, or the easy-to-open process area overlapping with the lower end edge of the top seal, for having straightness of tear in the width direction of the bag. <10> The bag according to any one of <1> to <9>, including an oblique seal section at a side of the gusset at the bottom, an angle 0 between an edge of the oblique seal section and an extended line of the bottom edge being 40 to 50'. <11> The bag according to any one of <1> to <10>, including an opening start section formed in a side seal on both sides of the bag directly below a top seal for having straightness of tear in the width direction of the bag. <12> A bag filled with powdered material, according to any one of <1> to <11>. [ 00901 <13> A box-shaped container including a bag made of film with the bag filled with powdered material, a box-shaped container main body for allowing the bag to be housed therein, and a lid for covering an opening of the container main body, the bag including a gusset at a bottom thereof; an upper part having a flat bag shape; and KAO-52 48 the bag having straightness of tear in a width direction of the bag. <14> The box-shaped container according to <13>, wherein the bag has a bottom end having a narrower outer width than an upper end. <15> A box-shaped container including according to <13> or <14>, wherein the bag filled with powdered material has a reverse taper shape having a narrower width at the lower end than at the upper end. <16> The box-shaped container according to any one of <13> to <15>, wherein the bag includes an opening start section in a seal section at a side, and a length from a bottom edge of the interior of the bag to the opening start section is substantially the same size as a depth of the container main body. <17> The box-shaped container according to <16>, wherein the length from the bottom edge of the interior of the bag to the opening start section is equal to or shorter than the depth of the container main body. <18> The box-shaped container according to <16>, wherein a difference between the depth of the container main body and the length from the bottom edge of the interior of the bag to the opening start section is equal to or shorter than 5 mm. <19> The box-shaped container according to any one of <13> to <18>, wherein the bag includes an opening start section in a seal section at a side, and KAO-52 49 a distance between an opening start point of the opening start section and a lower end edge of a top seal for sealing an upper part of the bag, or a distance between an opening start point of the opening start section and a lower end edge of a tear guide seal sealing the front and rear films of the bag into a strip shape in the width direction below the top seal, is within 10 mm, for having straightness of tear in the width direction. Reference Signs List [ 0091] 1 box-shaped container 10 0 A, 100B, 100C bag 10 1 A, 10 1 B, 101C, 10 1 D, 10 1 E, 10 1 X bag 10 2 A, 10 2 B, 102C, 10 2 D, 10 2 X, 10 2 X bag 11 gusset 12 side seal (vertical seal) 12a oblique seal section 13 top seal 13a upper end edge of top seal 13b lower end edge of top seal 14 hem seal 15 tear guide seal 16 opening start section or notch 20 laser process line 21 easy-to-open process area 21a upper end edge of easy-to-open process area 21b lower end edge of easy-to-open process area KAO -52 50 22 slit 25 film reinforcing member 30 container main body 31 folding piece 32 slit 33 retaining section 40 lid 100 film having straightness of tear 101 band-shaped film for forming body of bag 110 film without straightness of tear 111 firm for forming gusset 120 seal to be side seal 140 continuous seal to be hem seal 250 long strip-shaped film reinforcing member BL a bottom edge of bag Dl, D2 distance between opening start point of opening start section and film reinforcing member D3 distance between opening start point of opening start section and top seal Hi length from bottom edge of bag to notch in the vertical direction H2 depth of container main body Li seal width of top seal L2 strip width of film reinforcing member L20 width of easy-to-open process area in the vertical direction of bag L21 length of slit KAO-52 51 L22 interval of slit L23 interval between intermittent lines of slits P powdered material X width direction of bag W1 outer width at the bottom of the bag W2 outer width at the upper end of the bag W3 net width of a bottom of a bag to be filled with the content W4 net width of an upper end of the bag filled with the content o angle between edge of oblique seal section and extended line of bottom edge KAO-52

Claims

1. A bag for powdered material, the bag being made of film and being arranged or configured to be housed in a box-shaped container main body having an opening in a top surface and a lid for covering the opening, the bag comprising: a gusset at a bottom thereof; an upper part having a flat bag shape; a bottom end having a narrower outer width than an upper end; and an opening start section in a seal section at a side, wherein the bag can be opened linearly in a width direction of the bag from the opening start section, and wherein a length from a bottom edge of an interior of the bag to the opening start section is substantially the same size as a depth of the container main body.

2. The bag according to claim 1, wherein the length from the bottom edge of the interior of the bag to the opening start section is equal to or shorter than the depth of the container main body.

3. The bag according to claim 2, wherein a difference between the depth of the container main body and the length from the bottom edge of the interior of the bag to the opening start section is equal to or shorter than 5 mm.

4. The bag according to any one of claims 1 to 3, 53 wherein a distance between an opening start point of the opening start section and a top seal for sealing an upper part of the bag or a lower end edge of a tear guide seal sealing the front and rear films of the bag into a strip shape in the width direction below the top seal, is within 10 mm, for having straightness of tear in the width direction.

5. The bag according to any one of claims 1 to 3, comprising: a film reinforcing member extending in the width direction of the bag and being adhered to film on the upper end side of the bag than the opening start section, for having straightness of tear in the width direction.

6. The bag according to any one of claims 1 to 3, comprising an easy-to-open process area extending in the width direction of the bag in the upper part of the bag, and an upper end edge or lower end edge of the easy-to-open process area overlapping with a lower end edge of a top seal of the bag, or the easy-to-open process area overlapping with the lower end edge of the top seal, for having straightness of tear in the width direction of the bag.

7. A bag substantially as herein described with reference to any embodiment shown in the accompanying drawings.