Packaging bag and washing product provided with packaging bag

Abstract

A packaging bag (10) and a washing product which is provided with a package and comprises the packaging bag, the packaging bag comprising a first sheet (10a) and a second sheet (10b). At least part of an edge of the first sheet and at least part of an edge of the second sheet are bonded together to form an accommodating space of the packaging bag. The ratio of the width (D) to the height (H) of the first sheet and the ratio of the width (D) to the height (H) of the second sheet are both in a range of 1-1.5. The packaging bag of the washing product provided with a package contains granular solids, so that after the packaging bag has been set upright for a long time, the granular solids inside of the packaging bag are still kept loose, thus facilitating pouring.

Description

Packaging bags and washing products with packaging bags Technical Field

[0001] The embodiments of this disclosure generally relate to the field of packaging technology, and more specifically, to a packaging bag and a washing product with the packaging bag. Background Technology

[0002] Typically, granular detergents such as laundry powder are sold in bags made of waterproof or water-resistant flexible film. The most common granular detergent bags are rectangular pillow-shaped, formed by sealing two rectangular sheets together. When these detergent products are sold in physical stores, due to the flat shape of the bags, they are usually stacked on top of each other for storage or shelf display. The detergent granules in the bags at the bottom are compacted and no longer fluffy, making it inconvenient to pour them out and reducing consumer comfort. In addition, the stacked shelf arrangement makes it difficult for consumers to quickly identify and pick up the products, which is detrimental to sales. When consumers use granular detergent products, the flat shape of the packaging bag is inconvenient for daily storage. Sometimes consumers will stand the bag upright and place it against a vertical wall or other vertical wall. For large-capacity packaging, the detergent granules at the top of the bag will be compacted due to gravity, making the lower detergent granules less fluffy and inconvenient to pour out of the bag, reducing the comfort of the consumer. In addition, large-capacity packaging bags cannot remain stably upright and may sometimes tip over accidentally. When the bag is opened, the granular detergent inside will vibrate and generate unwanted dust.

[0003] On the other hand, when consumers are ready to use granular detergent, they typically tear or cut an opening at the top corner of the packaging bag, through which the granular detergent product can be poured out. After each use, this opening needs to be sealed, for example, with a clip or rubber band to prevent the granular detergent from leaking out of the packaging bag, and to prevent moisture / water from entering the packaging bag and causing the granular detergent to clump or agglomerate inside. However, the size and shape of such openings formed by tearing or cutting can vary greatly, making it difficult to control the amount and rate of granular detergent dispensed from such openings. Furthermore, sealing such openings with clips or rubber bands can still lead to accidental leakage, and they may not form an effective moisture / water barrier, causing the detergent to become damp and clump, making it difficult to pour out of the packaging bag, and over time, degrading the detergent's washing effect.

[0004] In real life, consumers prefer to buy granular detergent products with large-capacity packaging bags. However, the weight of these large-capacity bags makes it difficult for consumers to keep the bag stable while pouring the granular detergent through the spout, and also makes it difficult to control the amount and speed of detergent dispensed from the spout.

[0005] Therefore, there is a need for a packaging bag with an improved shape that can stand upright easily after containing granular solids, and that keeps the granular solids inside loose even after standing upright for a long time, making it easy to pour out, thereby improving the user's comfort. At the same time, the packaging bag needs to be equipped with a spout for dispensing granular solids and a component to assist in pouring so that consumers can use detergents easily. Summary of the Invention

[0006] The purpose of this disclosure is to address at least one aspect of the aforementioned problems and defects existing in the prior art.

[0007] According to one aspect of this disclosure, a packaging bag is provided, comprising a first sheet and a second sheet, wherein at least a portion of the edges of the first sheet and the second sheet are joined together to form a receiving space of the packaging bag, characterized in that the ratio of the width to the height of the first sheet and the ratio of the width to the height of the second sheet are both in the range of 1-1.5.

[0008] According to an exemplary embodiment of this disclosure, the ratio of the width to the height of the first sheet and the ratio of the width to the height of the second sheet are both in the range of 1.2-1.5.

[0009] According to an exemplary embodiment of the present disclosure, at least a portion of the edges of the first sheet and the second sheet are joined together to form an edge banding with a width of 8 mm to 12 mm.

[0010] According to an exemplary embodiment of the present disclosure, the packaging bag further includes a bottom insert, wherein the bottom edges of the first sheet and the second sheet are respectively joined to the periphery of the bottom insert, and the remaining portions of the edges of the first sheet and the second sheet are joined to form a receiving space of the packaging bag, wherein the bottom insert can be folded in half and sandwiched between the first sheet and the second sheet, so that the entire packaging bag forms a flat shape.

[0011] According to an exemplary embodiment of this disclosure, the bottom edge of the first sheet and the bottom edge of the second sheet are respectively joined to the periphery of the insert to form an edge band with a width of 8 mm to 12 mm.

[0012] According to an exemplary embodiment of this disclosure, the first sheet, the second sheet, and the insert all include multiple composite material layers.

[0013] According to an exemplary embodiment of this disclosure, the first sheet, the second sheet, and the insert each comprise two composite material layers.

[0014] According to an exemplary embodiment of this disclosure, the outermost material layer of the plurality of composite material layers is a uniaxial tensile composite material layer, and the density of the innermost material layer is less than the density of the other material layers.

[0015] According to an exemplary embodiment of this disclosure, the middle material layer among the plurality of composite material layers is a biaxially oriented composite material layer.

[0016] According to an exemplary embodiment of this disclosure, the width of the first and second sheets of the packaging bag is 350 mm to 420 mm, the height is 240 mm to 300 mm, and the height of the bottom after being folded is 30 mm to 70 mm.

[0017] According to an exemplary embodiment of the present disclosure, a first inclined edge is provided at one corner of the top of the packaging bag, which is inclined toward the top center line of the packaging bag. The packaging bag also includes a handle, which is disposed at the first inclined edge and the grip portion of the handle is inclined toward the top center line of the packaging bag.

[0018] According to an exemplary embodiment of this disclosure, the handle is rigid and ear-shaped.

[0019] According to an exemplary embodiment of the present disclosure, the top corner of the packaging bag is provided with a second inclined side that is inclined toward the top center line of the packaging bag, and the packaging bag also includes a mouth portion disposed at the second inclined side, the axis of the mouth portion being inclined relative to the top of the packaging bag and the opening of the mouth portion facing away from the bottom of the packaging bag.

[0020] According to an exemplary embodiment of this disclosure, the mouth is rigid and cylindrical in shape, wherein the diameter of the cylinder is 21 mm to 28 mm.

[0021] According to another aspect of this disclosure, a packaged washing product is provided, comprising a packaging bag according to any one of claims 1-14, characterized in that the packaging bag contains granular solids.

[0022] According to an exemplary embodiment of this disclosure, the height of the remaining space after the packaging bag is filled with the granular solid is 9 cm to 11 cm.

[0023] According to an exemplary embodiment of this disclosure, the median weight particle size of the particulate solid is between 200 μm and 1000 μm; the bulk density is 0.3 g / cm³. 3 Up to 0.9 g / cm 3 between.

[0024] According to an exemplary embodiment of this disclosure, the median weight particle size of the particulate solid is between 250 μm and 950 μm; the bulk density is 0.35 g / cm³. 3 Up to 0.8 g / cm 3 between.

[0025] According to an exemplary embodiment of this disclosure, the median weight particle size of the particulate solid is between 300 μm and 850 μm.

[0026] The packaging bag provided according to the foregoing exemplary embodiments of the present disclosure has the advantage that the packaging bag can be easily erected after containing particulate solids, and the particulate solids inside remain loose after being erected for a long time, making it easy to pour out. At the same time, the packaging bag is provided with a spout for dispensing particulate solids and a component for assisting in pouring so that the particulate solids contained in the packaging bag can be discharged and distributed in a controlled and smooth manner. Attached Figure Description

[0027] Other objects and advantages of this disclosure will become apparent from the following description of the disclosure with reference to the accompanying drawings, and will help to provide a comprehensive understanding of the disclosure.

[0028] Figure 1 shows a schematic diagram of the back structure of a packaging bag according to an exemplary embodiment of the present disclosure, wherein the insert bottom is folded.

[0029] Figure 2 is a schematic diagram of the front structure of a packaging bag according to an exemplary embodiment of the present disclosure, wherein the bottom is folded; and

[0030] Figure 3 is a schematic diagram of the bottom structure of a packaging bag according to an exemplary embodiment of the present disclosure, wherein the insert is unfolded. Detailed Implementation

[0031] The technical solutions of this disclosure will be further described in detail below through embodiments and in conjunction with the accompanying drawings. In this specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of this disclosure with reference to the accompanying drawings is intended to explain the overall concept of this disclosure and should not be construed as a limitation thereof.

[0032] Furthermore, in the following detailed description, numerous specific details are set forth for ease of explanation to provide a thorough understanding of the embodiments disclosed herein. However, it will be apparent that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and apparatuses are illustrated to simplify the figures.

[0033] According to a general technical concept of this disclosure, a packaging bag is provided, comprising a first sheet and a second sheet, wherein at least a portion of the edges of the first sheet and the second sheet are joined together to form a receiving space of the packaging bag, characterized in that the ratio of the width D to the height H of the first sheet and the ratio of the width D to the height H of the second sheet are both in the range of 1-1.5. This disclosure also provides a packaged washing product comprising the above-described packaging bag, wherein the packaging bag contains granular solids.

[0034] In this document, the term "granular detergent" refers to a solid powder or granular detergent, preferably a free-flowing powder or granular detergent, such as a multipurpose detergent or heavy-duty detergent for fabrics, as well as detergent auxiliaries, such as bleaching actives, rinsing aids, additives, or pretreatment products.

[0035] The packaging bags disclosed herein can be used to package a variety of solid granular detergent products. These packaging bags can hold the following products: cleaning products, disinfectants, dishwashing solutions, laundry detergents, fabric conditioners, fabric dyes, surface protectants, hair care products, food, pharmaceuticals, supplements, automotive supplies, and aviation supplies.

[0036] Figure 1 shows a schematic diagram of the back structure of a packaging bag according to an exemplary embodiment of the present disclosure, wherein the insert bottom is folded. Figure 2 is a schematic diagram of the front structure of a packaging bag according to an exemplary embodiment of the present disclosure, wherein the insert bottom is folded in half; and Figure 3 is a schematic diagram of the bottom structure of a packaging bag according to an exemplary embodiment of the present disclosure, wherein the insert bottom is unfolded.

[0037] As shown in the figure, a packaging bag 10 according to this disclosure mainly includes a first sheet 10a and a second sheet 10b. The upper edges of the first sheet 10a and the second sheet 10b are joined together to form an upper receiving space of the packaging bag 10. The joined portion of the edges of the first sheet 10a and the second sheet 10b forms a sealing edge with a width d of 12mm. The ratio of the width D to the height H of the first sheet 10a and the ratio of the width D to the height H of the second sheet 10b are both in the range of 1-1.5. Preferably, the ratios of the width D to the height H of the first sheet 10a and the ratios of the width D to the height H of the second sheet 10b are both in the range of 1.2-1.5. The above ratio range ensures that when the packaging bag 10 is in an upright position, the granular solids contained inside are generally spread out on the plane where the packaging bag 10 is placed, and the gravity of the granular solids is evenly distributed, so as not to compact or harden the loosely packed granules inside the packaging bag 10.

[0038] As shown in the figure, the packaging bag 10 provided according to the exemplary embodiment of this disclosure further includes a bottom insert 10c. The bottom edges 11 of the first sheet 10a and the second sheet 10b are respectively joined to the periphery of the bottom insert 10c. The remaining portion of the edge of the first sheet 10a is joined to the remaining portion of the edge of the second sheet 10b, thereby forming the entire receiving space of the packaging bag 10. The portions where the bottom edges 11 of the first sheet 10a and the second sheet 10b are joined to the periphery of the bottom insert 10c form a sealing edge with a width d of 12 mm. The bottom insert 10c can be folded in half and sandwiched between the first sheet 10a and the second sheet 10b, so that the entire packaging bag 10 forms a flat shape.

[0039] When the insert bottom 10c is folded in half, the entire packaging bag 10 is emptied of the granular solids, forming a flat shape. When the insert bottom 10c is unfolded, a flat bottom is formed, allowing the packaging bag 10 containing the granular solids to stand stably upright.

[0040] Specifically, the first sheet 10a and the second sheet 10b are joined together at least at the first side 13 and the second side 14, and the first sheet 10a, the second sheet 10b, and the insert 10c are joined together at the bottom edge 11. The first sheet 10a, the second sheet 10b, and the insert 10c together form an accommodating space, wherein the insert 10c can be folded in half and sandwiched between the first sheet 10a and the second sheet 10b. According to an exemplary embodiment of this disclosure, the packaging bag 10 is jointly constituted by the first sheet 10a, the second sheet 10b, and the insert 10c. In some other embodiments not shown, the packaging bag 10 may also be constituted only by the first sheet 10a and the second sheet 10b, i.e., excluding the insert 10c.

[0041] It should be noted that the width d of the sealing edge of the packaging bag 10 provided according to the example embodiment of this disclosure is not limited to 12mm, and the width of the sealing edge d can be between 8mm and 12mm.

[0042] According to this disclosure, the first sheet, the second sheet, and the insert of the packaging bag each comprise multiple composite material layers. Specifically, the first sheet, the second sheet, and the insert each comprise two composite material layers. The outermost layer of the multiple composite material layers is a uniaxial tensile composite material layer, and the density of the innermost layer is lower than the density of the other layers. The middle layer of the multiple composite material layers is a biaxial tensile composite material layer.

[0043] According to this disclosure, the first sheet and / or the second sheet and / or the insert of the packaging bag 10 may be formed of at least one flexible film material layer. According to this disclosure, the first sheet and / or the second sheet and / or the insert of the flexible bag body 10 may be formed of at least one flexible film material, wherein the flexibility coefficient (elastic modulus) of the flexible film material is 100 MPa (N / mm²). 2 ) to 1500 MPa (N / mm 2 Within the range of ), preferably within 400 MPa (N / mm²). 2 ) to 1100 MPa (N / mm 2 Within the range of 20 microns to 250 microns, preferably within the range of 100 microns to 160 microns, the thickness of the flexible membrane material is in the range of 20 microns to 250 microns.

[0044] According to this disclosure, the first sheet and / or second sheet and / or insert of the packaging bag may be made of multiple or two composite film layers. The inner layer is in contact with the granular detergent contained in the packaging bag, while the outer layer forms the outermost surface of the packaging bag. For example, in an embodiment employing multiple composite film layers, the outer layer is preferably polyester, the inner layer is preferably polyethylene, and the middle layer is preferably nylon. In another embodiment employing multiple composite film layers, the outer layer is preferably uniaxially oriented polyethylene, the inner layer is preferably low-density polyethylene, and the middle layer is preferably biaxially oriented polyethylene. In an embodiment employing two composite film layers, the outer layer is preferably polyester, and the inner layer is preferably polyethylene. In another embodiment employing two composite film layers, the outer layer is preferably nylon, and the inner layer is preferably polyethylene. Of course, in other embodiments, the first sheet and / or second sheet and / or insert of the packaging bag may also be made of any suitable flexible film layer and / or composite film layer as needed, and this disclosure is not limiting.

[0045] Furthermore, the first and / or second sheets and / or part, multiple parts, or all of the insert of the packaging bag may be coated or uncoated, treated or untreated, processed or unprocessed in any manner known in the art. The flexible film and / or composite film materials used to manufacture the packaging bags disclosed herein may be formed in any manner known in the art and may be joined together using any kind of joining or sealing method known in the art, including, for example, heat sealing (e.g., conductive sealing, pulse sealing, ultrasonic sealing, etc.), welding, curling, bonding, adhesion, etc., and any combination thereof.

[0046] In an exemplary embodiment according to this disclosure, the width D of the first sheet 10a and the second sheet 10b of the packaging bag 10 is 350 mm to 420 mm, the height H is 240 mm to 300 mm, and the height h of the folded bottom 10c is 30 mm to 70 mm.

[0047] Specifically, according to an example embodiment of this disclosure, the width D of the first sheet 10a and the second sheet 10b is 350mm, the height H is 260mm, and the height h of the insert 10c after being folded is 55mm.

[0048] Specifically, according to another example embodiment of this disclosure, the width D of the first sheet 10a and the second sheet 10b is 380mm, the height H is 280mm, and the height h of the insert 10c after being folded is 55mm.

[0049] Specifically, according to another example embodiment of this disclosure, the width D of the first sheet 10a and the second sheet 10b is 420mm, the height H is 320mm, and the height h of the insert 10c after being folded is 65mm.

[0050] As shown in the figure, the top corner of the packaging bag 10 is provided with a first inclined side 15 that slopes towards the top center line of the packaging bag 10. The packaging bag 10 also includes a handle, which is provided at the first inclined side 15 and the gripping part of the handle is inclined towards the top center line of the packaging bag 10. The handle is rigid and roughly ear-shaped.

[0051] Specifically, according to embodiments of this disclosure, the handle 30 may include a peripheral portion 31 and a through portion 32 defined by the peripheral portion 31, the through portion 32 penetrating the packaging bag 10. The peripheral portion 31 has at least two finger receiving grooves 33 formed on its inner periphery toward the through portion 32. The handle 30 may be heat-sealed between a first sheet 10a and a second sheet 10b of the packaging bag 10 via the outer periphery of the peripheral portion 31. In some alternative embodiments, the handle may also be a through hole formed by cutting / piercing one or more sealed portions of the packaging bag 10 (i.e., a completely open space through which fingers and / or thumbs can be inserted).

[0052] In an exemplary embodiment according to this disclosure, the top corner of the packaging bag 10 is provided with a second inclined side 16 that slopes toward the top centerline of the packaging bag 10. The packaging bag 10 also includes a spout 20 disposed at the second inclined side 16. The axis of the spout 20 is inclined relative to the top of the packaging bag 10, and the opening of the spout 20 faces away from the bottom of the packaging bag 10. The spout 20 is rigid and has an overall cylindrical shape. The spout 20 is configured to dispense the contents contained in the packaging bag 10 (in an exemplary embodiment, granular laundry detergent) via the spout 20.

[0053] Specifically, in the exemplary embodiments shown in Figures 1 to 3, the top edge 12 of the packaging bag 10 is connected to the first side edge 13 via a first inclined edge 15, and a handle 30 is formed near the first inclined edge 15. Meanwhile, the top edge 12 of the packaging bag 10 is connected to the second side edge 14 via a second inclined edge 16, and the mouth portion 20 is attached to the second inclined edge 16. Preferably, the mouth axis A1 of the mouth portion 20 can be perpendicular to the second inclined edge 16.

[0054] The rigid nozzle 20 is generally cylindrical, communicates with the internal receiving space of the packaging bag 10, and is configured to dispense granular detergent from the internal receiving space of the packaging bag 10. The diameter of the cylinder is in the range of 20 mm to 50 mm, preferably, the opening diameter of the cylinder is in the range of 20 mm to 30 mm, more preferably 21 mm to 28 mm, and most preferably 22 mm to 26 mm. Testing has shown that rigid nozzles with opening diameters within the above ranges are particularly suitable for dispensing granular detergent. If the nozzle opening diameter is less than 20 mm, for example, 15 mm, the volumetric flow rate for dispensing granular detergent is too slow and may result in insufficient feeding. If the nozzle opening diameter is greater than 30 mm, for example, 33 mm, the volumetric flow rate for dispensing granular detergent is too fast and may result in overfeeding. The length L of the nozzle is in the range of 20 mm to 50 mm, preferably 30 mm to 40 mm, and more preferably 32 mm to 38 mm.

[0055] According to this disclosure, the rigid mouthpiece 20 may also include a cap (not shown). The cap removably covers the mouthpiece 20. For example, the cap is removably engaged to the rigid mouthpiece 20 via an internal thread that engages with a corresponding external thread on the periphery of the mouthpiece 20 to close the mouthpiece and prevent accidental leakage of particulate detergent.

[0056] Compared to the first sheet 10a and / or the second sheet 10b and / or the insert 10c used to make the packaging bag 10, the spout 20, as described above, has a relatively rigid structure and can be made of any suitable rigid material, such as glass, metal, polymer, etc., but preferably of polymer. Specifically, the spout and / or the cap can be made of the same or different materials. Preferably, each of them is independently made of a group selected from polypropylene (PP), polyethylene (PE), polycarbonate (PC), polyamide (PA), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polystyrene (PS), and combinations thereof.

[0057] According to another aspect of this disclosure, a packaged washing product is also provided, comprising the packaging bag described in any of the above embodiments, wherein the packaging bag contains granular solids.

[0058] The height H1 of the remaining space after the packaging bag is filled with the granular solid is 9cm to 11cm.

[0059] According to this disclosure, the granular detergent particles contained in the packaging bag are characterized in that their median weight particle size (Dw50) is between 200 μm and 1000 μm, preferably between 250 μm and 950 μm, and more preferably between 300 μm and 850 μm. The granular detergent particles are also characterized in that their bulk density is between 0.3 g / cm³ and 0.9 g / cm³, preferably between 0.35 g / cm³ and 0.8 g / cm³. The moisture content of the granular detergent is between 2.7% and 3.0%.

[0060] Experiments show that when the ratio of the width D to the height H of the first sheet and the ratio of the width D to the height H of the second sheet of the packaging bag are both within the range of 1.2-1.5, the packaging bag contains more fluff, has stronger fluidity, and is easier to pour out. In contrast, when the ratio of the width D to the height H of the first sheet and the ratio of the width D to the height H of the second sheet of the packaging bag are not within this range, the granular detergent has a higher bulk density and more severe clumping when the packaging bag contains the same amount of granular detergent.

[0061] The packaging bags provided according to the foregoing exemplary embodiments of this disclosure have the advantage that they can be easily stood upright after containing granular solids, and that the granular solids inside remain loose even after prolonged standing, facilitating emptying. Furthermore, the packaging bags are equipped with a spout for dispensing granular solids and components to assist in emptying, so that the granular solids contained within the packaging bags can be discharged and distributed in a controlled and smooth manner.

[0062] Those skilled in the art will understand that the embodiments described above are exemplary and can be improved upon. The structures described in the various embodiments can be freely combined without causing structural or principle conflicts.

[0063] Although this disclosure has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to illustrate preferred embodiments of this disclosure and should not be construed as a limitation thereof.

[0064] While some embodiments of the concept of this disclosure have been shown and described, those skilled in the art will understand that changes may be made to these embodiments without departing from the principles and spirit of the overall concept of this disclosure, the scope of which is defined by the claims and their equivalents.

[0065] It should be noted that the word "comprising" does not exclude other elements or steps, and the words "a" or "an" do not exclude multiple. Furthermore, any element reference numerals in the claims should not be construed as limiting the scope of this disclosure.

[0066] The dimensions and values ​​described herein should not be construed as strictly limited to the precise numerical values ​​cited. Rather, unless otherwise stated, each dimension is intended to represent the listed value and a range of functionally equivalent values ​​around that value. For example, a dimension disclosed as “8mm” is intended to represent “approximately 8mm”.

Claims

1. A packaging bag comprising a first sheet and a second sheet, wherein, At least a portion of the edges of the first sheet and the second sheet are joined together to form the receiving space of the packaging bag, characterized in that the ratio of the width to the height of the first sheet and the ratio of the width to the height of the second sheet are both in the range of 1-1.

5.

2. The packaging bag according to claim 1, characterized in that, The ratio of the width to the height of the first sheet and the ratio of the width to the height of the second sheet are both within the range of 1.2-1.

5.

3. The packaging bag according to claim 1, characterized in that, At least a portion of the edges of the first sheet and the second sheet are joined together to form an edge banding with a width of 8 mm to 12 mm.

4. The packaging bag according to claim 3, characterized in that, It also includes a bottom insert, wherein the bottom edges of the first sheet and the second sheet are respectively joined to the periphery of the bottom insert, and the remaining portion of the edge of the first sheet is joined to the remaining portion of the edge of the second sheet, thereby forming the receiving space of the packaging bag, wherein the bottom insert can be folded in half and sandwiched between the first sheet and the second sheet, so that the entire packaging bag forms a flat shape.

5. The packaging bag according to claim 4, characterized in that, The bottom edges of the first sheet and the second sheet are respectively joined to the periphery of the insert to form an edge band with a width of 8mm to 12mm.

6. The packaging bag according to any one of claims 4-5, characterized in that, The first sheet, the second sheet, and the insert all include multiple composite material layers.

7. The packaging bag according to any one of claims 4-5, characterized in that, The first sheet, the second sheet, and the insert all include two composite material layers.

8. The packaging bag according to claim 6, characterized in that, The outermost layer of the multiple composite material layers is a uniaxial tensile composite material layer, and the density of the innermost layer is lower than that of the other layers.

9. The packaging bag according to claim 8, characterized in that, The middle material layer among the plurality of composite material layers is a biaxially oriented composite material layer.

10. The packaging bag according to any one of claims 4-5, characterized in that, The width of the first and second sheets of the packaging bag is 350mm to 420mm, and the height is 240mm to 300mm. The height of the bottom after being folded in half is 30mm to 70mm.

11. The packaging bag according to claim 10, characterized in that, The packaging bag has a first inclined edge at one corner of its top, which is inclined toward the top center line of the packaging bag. The packaging bag also includes a handle, which is located at the first inclined edge and the gripping part of the handle is inclined toward the top center line of the packaging bag.

12. The packaging bag according to claim 11, characterized in that, The handle is rigid and ear-shaped.

13. The packaging bag according to claim 11, characterized in that, The top corner of the packaging bag is provided with a second inclined side that slopes toward the top center line of the packaging bag. The packaging bag also includes a mouth, which is located at the second inclined side. The axis of the mouth is inclined relative to the top of the packaging bag and the opening of the mouth faces away from the bottom of the packaging bag.

14. The packaging bag according to claim 13, characterized in that, The mouthpiece is rigid and cylindrical in shape, wherein the diameter of the cylinder is 21 mm to 28 mm.

15. A packaged washing product, comprising a packaging bag according to any one of claims 1-14, characterized in that, The packaging bag contains granular solids.

16. The washing product according to claim 15, characterized in that, The height of the remaining space in the packaging bag after it is filled with the granular solid is 9cm to 11cm.

17. The washing product according to claim 15 or 16, characterized in that, The median weight particle size of the granular solid is between 200 μm and 1000 μm; the bulk density is 0.3 g / cm³. 3 Up to 0.9 g / cm 3 between.

18. The washing product according to claim 17, characterized in that, The median weight particle size of the granular solid is between 250 μm and 950 μm; the bulk density is 0.35 g / cm³. 3 Up to 0.8 g / cm 3 between.

19. The washing product according to claim 18, characterized in that, The median weight particle size of the particulate solid is between 300 μm and 850 μm.

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