TW452563B - Package for sheet dispensing - Google Patents

Abstract

A flexible package for containing and dispensing sheet products, such as facial tissues, premoistened wet wipes, and the like is disclosed. The package comprise a single, unitary piece of polymer film formed to define a pocket having a back face, a front face, two opposing longitudinal edges formed by a fold. Two sealed regions are disposed near two opposing side edges, and a flexible flap is hingedly rotatable from a first closed position generally about one of the longitudinal edges, the flap covering at least a portion of the front face when in the first position. The flap has opposing side edges substantially coincident to and sealed at the sealed regions. The flap has a transverse centerline and at least one line of weakness disposed on either side of the centerline inboard of the side edges, the lines of weakness allowing a portion of the flap to be frangibly fixed in the first position. The flexible package preferably comprises a heat-sealable polymer, for example, polyethylene. A dispensing opening, for example on the front face of the pocket portion, allows dispensing of individual sheets of the stack of sheet products. A method of forming the package of the present invention is also disclosed. The method steps comprises providing a substantially rectangular flexible polymer sheet of suitable size, the sheet having first and second opposing sides defining a first dimension and third and fourth opposing sides defining a second dimension. Two lines of weakness are formed, each the lines of weakness extending generally orthogonal from the first side, in the direction of the second side. A stack of the sheet products is placed on the polymer sheet, the sheet products being substantially centrally disposed with respect to the first and second short sides. A first portion of the polymer sheet is folded such that the fourth side is disposed approximately parallel to the third side and approximately one-third the length from the third side thereby forming a pocket region containing the stack of sheet products. A second portion of the polymer sheet is folded such that the third side is disposed approximately parallel to the fourth side to form a tri-folded package having first and second opposing side edges. A portion of the tri-folded polymer sheet is then bonded near the first and second opposing side edges.

Description

45256 3 V. Description of the invention (1) The present invention relates to the use of a thin paper structure which is used for dispensing thinners. When the towel is wet, the paper surface or another paper towel, or the material is soaked, it can indicate that the cleaning work has been opened to eliminate consumption, and it includes the application of paper towels and other close-knit paper fabrics, and toilet paper leaves the home in many cases. Towels are also often personally cleaned by our own, such as non-, or when making "wet tissues", the person who sends the tissues carries elastic plastic mouths, which cover the dispensing contact. The water-closing device is used to contain and dispense tick products. For example, the paper towels shown in the art can be discarded as 'kindsin' paper towels, or different paper towels in the home are used to clean young children. Disposable-the underlying fabric material. It is mixed with liquid or "towel" when it is used at the bottom. When it is often carried in a wet package, it has less coordination. This kind of packaging, plastic packaging material, also has an opening, so it can't penetrate the packaging of the previously wet and wet sheet products, especially the flexible packaging of facial tissue. Disposable wipes Wipe paper towels, personally clean the premises, and wipe the face with a small amount. Disposable wipes, the bottom layer is structured. Leave home first. The measuring paper can usually have a different cover to avoid dust, plastic wrap, paper towels and scratches. Today, its 'My People's Cleansing Spills' layer of hands or wipes is structured in a wet cloth before use and used 'such as paper weaving are already widely carried', such as objects, which are first used after being dirty in the toilet. Wiping on a variety of fibrous materials can be used to clean the nose with paper. Wet or multi-layered agents and articles are also personal wipes, such as 10 to 12 sheets, adapted to the consumer's pockets, fragile perforated lines to form sheet members, so that moisture and other ingredients can be packed without dust. And sealing covers or words are particularly important.

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45256 3 V. Description of the invention (2) The packaging of many paper towels, such as paper or advanced fisherman's paper towels, has been developed to allow consumers to carry paper towels in their pockets' bags or cars. For example, Worrell (Sr.), U.S. Patent No. 4,1 3 1,19,5, published on December 26, 1978, discloses a simple, disposable water and gas impermeable package. , Which is used to dispense a stack of wet sheets in advance. However, the packaging disclosed herein must be cut and bonded with individual materials to form each package. We know that resealable packaging has an adhesive sealing member, for example, Pon si is equivalent to US Patent No. 5,725,311 published on March 10, 1998, which discloses a resealable packaging. The label is on the opening of the package. This package has many different shapes and designs, but they all use fairly rigid labels' stickers or other re-sealable adhesive members. The hard plastic case used to hold paper towels is well known to us, but its size cannot be too large, and it is less suitable for personal carrying, such as in a pocket. Current methods for making tissue packaging include cutting and gluing many parts, such as the front, back, and any adhesive stickers. If the cover sheet is used to cover the dispensing opening, the cymbal sheet must be cut and bonded in a separate process, which increases the complexity and cost of manufacturing. Therefore, we expect that the packaging used to dispense paper towels is relatively low in manufacturing cost and suitable for adding dry paper towels or advanced fisherman's paper towels, whose cover can cover the dispensing openings. The invention requires a flexible packaging ’which is used to contain and dispense sheet products such as noodles

Page 11 45 5. Description of the invention (3) Paper, a thin layer of wet tissue paper first to define the opposite longitudinal edges and the like formed by stacking a bag, including the back edge. Two seals Edge edge The car is sealed by rotating the cover sheet. Cover the sides with a crisp elastic pocket object. The length of the hair is the side. Two exhibitions. — And secondly, after the fourth length shape is formed, three edges, an elastic cover sheet and a longitudinal edge, and when there is an opposite side of the sheet with a weak solid packaging surface, the square shell is also defined to define the fragility. The line-shaped sheet-shaped short side is approximately a mouth, and the side edge of the cover sheet is covered when the second part is a three-fold folded first position. position_. . The package has a single polymeric surface, a front surface, and two foldable areas that are close to the two opposite side edges to cover at least a portion of the front surface from the first closed position. Close the sealing area and place at least one fragile line there, on the edge of the fragile line, and allow one part of the cover sheet to include a heat-sealed polymer, such as polyethylene. Located in the matching opening allows individual sheets of a stack of sheet-shaped products to be dispensed. The method of manufacturing is to aggregate one size sheet at the center of the second product position and parallel to the bag area. And the direction of the first side is placed on the polymer sheet. The third side of the polymer is configured to accommodate the third side of the stack, which has the first side, the four side steps of the polymer are placed on the first side of the first side, and the third side is approximately parallel to the side of the product side. The joining of adjacent first and second steps at the first and second opposing positions includes providing the first and second opposite sides of a suitable ruler which define a second ruler extending orthogonally at one side, which is a first relative to the first The part is about 1/3 of the folded edge. Polymer sheet Four sides configuration Side edges. Second opposite side

Page 12 452563 V. Description of the invention (4) Brief description of the drawings Figure 1 is a plan view of the package of the present invention; Figure 2 is a cross-sectional view of the package in Figure 1; Figures 3 and 3A are cross-sectional views of another structure of the package in Figure 1; And 4A is a cross-sectional view of another structure of the package in FIG. 1; FIG. 5 is a perspective view of the cover and the open position of the package of the present invention; FIG. 6 is a perspective view of the cover sheet in the open position of another specific embodiment of the package of the present invention; 7E shows the formation of polymer sheets in different stages of the present invention; and FIG. 8 is a perspective view of the cover sheet in an open position according to another embodiment of the packaging of the present invention. DETAILED DESCRIPTION OF THE INVENTION Although the following description discloses that the packaging of the present invention is mainly about facial tissues, I understand that the packaging is not limited to dispensing such materials. The packaging of the present invention is suitable for any material to which individual sheets are to be applied, such as sanitary towels, napkins or paper towels. The packaging of the present invention is particularly suitable for containing and dispensing wet tissue paper towels, sometimes wet paper towels or towels. The term " sheet M or " sheet product " as referred to herein refers to a product which can be contained and dispensed by the packaging of the present invention, and the term may be a thin fabric or a wet tissue. The term "n-thin fabric" as used herein refers to a dry fibrous layer that has sufficient softness and absorbency to be used as a facial tissue, sanitary towel, napkin or paper towel. To give a non-limiting example, the packaging of the present invention is applied The thin fabric is PUFFS® face paper sold by The Procter & Gamble Co.

Page 13 452563 V. Description of the invention (5) The term "paper towel" as used herein refers to a wet paper towel that has been soaked with a suitable cleaning solution or lotion. Etc. However, the use of paper towels is not limited to the final product. To give a non-limiting example, the paper towels used in the packaging of the present invention are PAMPERS ® baby paper towels sold by The Procter & Gamble Co .. According to the present invention The package is indicated by 10 in the illustration. The package can be quite rigid, but it is relatively flexible and better for users to carry in their pockets. Therefore, the disclosure here is mainly about the specific embodiment of the invention with elasticity. However, it is not a limitation. In fact, its operating principles and advantages can also be completed by using harder technology. As shown in Figures 1 and 2, the package 10 includes an elastic packaging element 12, which is formed by a single elastic thin layer. For example, a thin layer of polymer. The body 12 forms an internal space and a pocket 14 to accommodate a sheet 16 of the package 10. The pocket 14 has a front 18 and a back 20 The sheet 16 is a series of discontinuous sheets that are folded and stacked together, such as a thin fabric or paper towel. In a preferred embodiment, the sheet 16 is a C-shaped folded PUFFS® tissue paper stacked together As shown in FIG. 1, the package 10 is generally rectangular and has two opposite longitudinal sides 22 and 24, both of which are formed by folding an elastic thin layer. The formation of the two opposite ends or side edges 26 and 28 will be The front surface 22, the back surface 24, and the cover sheet 30 are sealed together in the sealing area 32. The sealing area 32 prevents moisture from penetrating and is manufactured by methods known in the art, such as applying pressure-sensitive adhesives, hot-melt adhesives. Agent, thermal bonding or ultrasonic bonding. In a preferred embodiment, the packaging body 12 is made of a heat sealing material, such as polyethylene. Seal

O: \ 63 \ 63830.ptd Page 14 V. Description of the invention (6) Area 3 2 can be formed by applying heat and pressure, such as using a heating rod, roller or other heated pressure surface. As shown in FIG. 2 'the cover sheet 30 has elasticity and can be pivoted from the first position, which covers a part of the front face of the pocket 14 18 ^ In a preferred embodiment, the' cover sheet 30 covers All of front 1 8. Cover moon 30-generally rotates in the folding area of the main body 12 which forms a longitudinal side 2 2. As shown in Figs. 1 and 2, the cover sheet 30 manufactured by the method of the present invention is fixed in a fragile manner in the first first closed position. For example, the fragile line 34 of the perforation line in FIG. 1 enables the cover sheet 30 to be opened along the fragile line to open the cover sheet 30 to the opened position in FIG. 5. The fragile thread 34 formed by cutting'perforation or other methods can produce a better tear line in the elastic thin layer of the package 10 of the present invention. Generally speaking, the fragile lines shown in the side edges 26 and 28 on both sides of the lateral centerline 36 are straight. The method is not limited to this. 26 and 28 are aligned with "Example 30. The temple at the opening part is semicircular when opened." Each side has a fragile line side and the sealing area 32 and is parallel to the side edge 26. The fragile line can be non-linear. When opened, the fragile trapezoid is formed. The fragile line can be negative, and the fragile line is located inside. Although Figure 1 shows 28, the fragile line is not inclined with respect to the side edge line. The cover sheet is linear so that the cover sheet can be self-signed at the open fragile line 34. * The opening can be extended at any distance from the end edge 31. It is sufficient to enter the fragile line 34 to stretch longitudinally, such as two / rear. In a preferred embodiment, the putting device 36 can be advanced to step two. In a specific embodiment, the required degree of the pressure release material 16: if the sepal 30 is improperly torn apart than the dispensing sheet, as shown in FIG. 1, the hole 3 6 is at the end of the line of weakness.

452563 V. Description of Invention (7) ----- End. When the secondary-person is closed ', as is known in the art, the cover slip 30 can be held in the first-closed position by any suitable means. As shown in Figures 1 and 2, what is the advantage of the auxiliary tape 3 8? The re-sealable adhesive is permanently fixed to the cover sheet 30, and the adhesive is applied to a portion where the sub sheet 34 of the adhesive f contacts the front surface 18 of the pocket 14. Other repeatable male closure devices include placing an appropriate adhesive on the side of the cover sheet facing the pocket ' such as the adhesive region 40 shown in FIG. The adhesive region 40 can be located on the mouth: 1 4 on the side of the front surface 18 facing the cover sheet, and the adhesive region 4 can be arranged on the cover sheet 30 or the front surface 18 in any desired size and shape, such as adhesion The agent is generally arranged along the end edge and / or the cover sheet side in FIG. 5. The more the adhesive is applied, the better the tackiness of the component when the cover is closed. However, it is very important that the cover is easy to open, so the appropriate type of adhesive, the amount and location of the adhesive must be considered to achieve a balance between the sealing of the component and the convenience of opening. With the opening 42, after the cover sheet 30 is opened, the user can dispense or pomelo individual pieces from the dispensing opening 42. As shown in FIG. 2, in the simplest embodiment, the formation of the dispensing opening 4 2 can be performed only when the longitudinal side edge 2 2 is folded without sealing the edge 4 4 of the polymer sheet. The user can grasp the cover sheet near the end 31 and pull it up to open the cover sheet. When the cover sheet is opened, the user can easily enter the cover sheet opening 4 2 and extract the desired sheet. In another embodiment, the opening 42 is formed as shown in the cross-sectional view of Fig. 4 by using an elongated cut or a fragile line, which is easy to produce a long cut by a user. For example, the fragile line 46 perforated in FIG.

Page 16 V. Description of the invention (8) Tear open to form a cut opening 4 2. Force: £ θ ^,. In another specific embodiment, the opening 42 may be an elliptical W-shaped circle or other shapes, as shown in FIG. 6. A boat clip said that the dispensing opening 42 could be any K that was sacrifice. ^ & The shape and size of Ting Jing depend on the moon shape to be applied. For dried spinach bismuth. For calendar paper towels, i; °: Second, the second line formed by the fragile perforation with the enlarged circular opening and tearing in Figure 6 has a smaller opening. 'For example, Figure 6 in Figure 5 shows another aspect of the present invention. A specific embodiment has the above-mentioned preparation pattern for dispensing openings 4 2 ◊Shi Xiji Γ7 Too Ϊ Ϊ * 7 ^ 丄 On the 0th, the generation of her σ is based on the fragile line of the opening shape, as shown in FIG. 6 One method of forming an ellipse pattern to form a fragile line is to use perforations. The adhesive region 40 may cover the entire cover sheet region, especially the entire region including the opening and the region surrounding the matching opening 42. When opened, the portion 48 removed to form the front side 18 of the opening 42 is still attached to the cover sheet 30. After that, the cover sheet can be closed and opened again, and the fragile thread 46 can prevent the cover sheet adhesive from improperly adhering to the 1 or 4 mouth sheet of the pocket. Adhesive is applied only in the area corresponding to the opening ', so when opened, the part 48 removed to form the front face 18 of 2 2 is still attached to the cover sheet 30, but there is no adhesive in the area covered by part 48 . If the dispensing opening is located in the front side 18, the edge 44 of the polymer sheet should be adhered at or near the longitudinal side 22 fold. Before the cover sheet is folded to the first closed position during the manufacturing process and before the sealing area 32 is sealed, it forms a longitudinal edge sealing area 50, so the edge 44 is sealed to the elastic polymer material of the package. Any known method in the art can be used, such as using an adhesive or ultrasonic welding, but it should be heat sealed by heat and pressure to form a hot-melt edge sealing area 50. As shown in Figure 3A, after sealing

Page 17 5 'Explanation of the invention (9) Sealing the end edge 5 2 of the cover sheet 30 in the process can form another longitudinal edge sealing area 50. As mentioned previously, the sealing may be by any known method, such as heating of the adhesive ', pressure, or a combination thereof. Figures 4 and 4A show another adhesive edge 44 construction of a polymer sheet at or near the longitudinal side 22 fold, in which the edge 44 itself is folded to form an edge folded area 54. As described above, the edge sealing area 50 ° is completed by any known method, such as adhesive, heating, pressure, or a combination thereof. As shown in FIG. 4A, 'the end edge 52 of the cover sheet 30 is sealed during the sealing process to form another longitudinal edge sealing area 50. The body 12 should preferably be made of a thin, elastic layer of material that is impervious to moisture, such as a thin layer of polymer. In a preferred embodiment, the thin layer material comprises a heat-sealable polymer material, such as polyethylene. In a specific embodiment, it utilizes LDPE / LLDPE of the type 1.0 to '.ο milSiEX_702 provided by Exxon Chemicals'. The thickness of the material is not the most important, but its thickness must be sufficient and durable. And it must be quite soft when touched. If the adhesive is used to form a cover sheet seal, the material should be suitable for resealable adhesives. The packaging of the present invention can be manufactured by hand or by using suitable packaging equipment, such as "flow wrap" equipment, which is commonly used to form packaging of plastic materials. Non-reduction is basically the same using a hand or a machine ', which is shown in Figures 7 to 7 for people. A suitable elastic thin layer material 60 is flat, which may be rectangular and has first and second relatively long sides 62 and 64, and first and second relatively short sides 66 and 68. The long side boundary defines a width w, and the short side boundary defines a length L. material

Page 18 452563 V. Description of the invention (ίο) The material 60 can be divided into two equal parts, for example, two outer regions γ0 and 74, and one inner region 72 □ However, the term η1 / 3M cited here is not limited -Literally, the material should be divided into three regions, which can be three identical parts, using the dashed lines 80 and 81 in Figure 7A to distinguish them. When the material is flat, any fragile line can be formed in the material, as shown in FIG. 7B. The fragile line 34 is located at an outer side / 3 and extends to the first short side edge 66. Similarly, the oval fragile line 76 shown in Fig. 7B can be formed when the material is flat. The stacked sheet 16 is placed on the inner side of the material 6/3 area 7 2, and then the outer side 1/3 area 7 4 with the dispensing opening is folded on the sheet in the direction of the arrow 7 6 'Therefore The second short side edge 68 is arranged side by side with a dotted line that distinguishes the outer 1/3 area 70 and the inner 1/3 area 72. From a careful comparison of the figures, it is found that the second short side edge 6 8 corresponds to the edge 4 4 in FIG. 2, which is disclosed in the steps described. Similarly, this folding step is folded at 22 on the longitudinal side of the package, as shown in FIG. 2. Therefore, 'this folding step is the first step of forming the pocket 丨 4' The outer 1/3 region 74 becomes the front surface 18 of the pocket 14, and the inner 1/3 region 72 becomes the back surface 20 of the pocket 14. As shown in Figures 3 to 4A, the edge 44 may be folded and / or joined as necessary to form an edge sealing area 50. If bonded by an adhesive, it must have the additional step of applying an adhesive. The same steps must be performed as necessary: folding, heating, and pressing. As shown by circle 7D, the outer third region 70 with the fragile line 34 is folded in the direction of the arrow 78. Once again by careful comparison of the circle theory, it is found that the first short side edge 66 corresponds to the end cover edge 31 in FIG. 1, which is disclosed in the steps described.

Page 19 V. Description of the invention (11) ^ Figure 2 is the same ^ This folding step is folded at the vertical side 24 of the package 10, not shown in Figure 2. Therefore, this folding step is the first step in forming a cover sheet. Second: sweet After the above method is folded, the appearance of the package is close. / Λ spots, two revealed as the "Tri-Fold" type, and the formation of the side edges 26 and U K as a final step can form the sealed area 32. In the example: the formation of the sealed area is performed by applying heat and pressure to the element layers by thermal fusion. This step is achieved by using two to heat the rod on the area to be sealed, such as heating the anvil and pressing it in the area. The steps may have different changes or additional steps as necessary, for example, the secondary sheet 38 may be added at an appropriate stage in the manufacture of the package 10. Similarly, the steps of folding in Figure or 7E can be completed before placing the sheet. = Continuous fabric rollers are used to wind the material 60 and the continuous packaging equipment of the mobile packaging equipment can be used as a commercially effective process. In the continuous process, the material 60 is drawn in the processing direction shown by the MD arrow in Figure 7E. The width 糸 corresponds to the length of the discontinuous material 60 in FIG. 7A. In a preferred process, the fragile threads and are produced in a separate step before the fabric material 60 continues. The right use is to print a thin layer of polymer 'fragile lines to match printing. The arrangement of each step in the process can be matched with the fragile line and / or the printing process. The process steps are basically the same. They use the appropriate folding tools to generate the required folds in order. After the edge sealing step shown in FIG. 7E is completed, the cutting step of ^ can generate individual packaging from the continuous fabric material 60

V. Description of the invention (12) The size of the final package can meet our needs, but in a preferred embodiment, the package of the present invention can be carried in a pocket or purse. In the presently preferred embodiment, how to use the size of the PUFFS paper sold

Page 21 452563 V. Description of the invention (13) After the paper towel is taken out, the film returns to the closed position, so that water vapor can be prevented from disappearing from the wet paper towel. Fig. 8 shows another shape of the cover sheet 30 formed by the non-linear perforated fragile line 34. In another embodiment, a pressure-sensitive adhesive is applied to the back of the package, that is, the side without a cover sheet or a dispensing opening, so the package can be temporarily fixed to the surface, and the cover sheet and the dispensing opening are fixed after the fixing. The front of the package is positioned for easy use. For example, the package can be fixed to the side of the refrigerator for domestic use, or fixed to the dashboard for use in the car. The adhesive is applied to the appropriate area of the package in a manner known in the art to provide sufficient adhesion. A release tape can be placed on the adhesive area before use. The pressure-sensitive adhesive used with the packaging of the present invention is a removable adhesive. For example, the adhesive has two viscosities on —t @ adhesive sticker. -Suitable adhesive is acrylic copolymer, which reveals

Sver), published on September 12, 1972, by Hu Jin ^-Patent No. 3, 6 9 I, 1 40, the Scholar and Girl Fighting 丨 丨 @ 赵 μ ^, + u. Μ belongs to Minnesota The Mlnnesota Mlning & Manufacturi adhesive in St. Paul, CA allows the packaging of the present invention to be removably secured to two or two. In another specific embodiment, the fixed cover sheet is stretched in a loop so that the user can completely "sheet one," and place the kneeling line of weakness near the end of the cover sheet. For later use, for example, a perforation can be opened, Continue to tear until the entire cover sheet is removed. 4 Methods of covering the cover sheet. Although the present invention is modified and improved in specific embodiments, it is in the spirit and scope of the present invention = no, but the various openings in the art are vulnerable. The line may be non-linear, such as the delimitation in Figure δ. As stated, it is intended to cover all changes and improvements in the attachment of the attached patent.

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Claims (1)

6. Scope of Patent Application 1. A package for containing and dispensing a sheet product and comprising: (a) a single piece of flat thin layer material used to define a pocket having a back surface, a The front surface, two opposite longitudinal sides, two sealing areas, and an elastic cover piece are arranged near the edges of the two opposite side edges, and the cover piece can be pivoted from the first position with the longitudinal side edges, and Covering at least a part of the front face in position; (b) the cover sheet has opposite side edges, which are arranged side by side with the sealing area and sealed there, and (c) the cover sheet has a lateral centerline and At least one fragile line, the fragile line is located inside the side edge and on either side of the center line, and allows a part of the cover sheet to be fixed in the first position in a fragile manner. 2. The flexible packaging according to item 1 of the patent application scope, wherein the front of the pocket has a dispensing opening to facilitate the dispensing of sheet products. 3. The flexible packaging according to item 2 of the scope of patent application, wherein the dispensing opening is an elongated cut in the front, and the width of the elongated cut when formed is 0 inches. 4. The flexible packaging according to item 2 of the patent application scope, wherein the shape of the dispensing opening is oval. 5. The flexible packaging according to item 1 of the scope of the patent application, which has a releasable and re-sealable sealing device to repeatedly cover the cover sheet in the first position. 6. The flexible packaging according to item 5 of the patent application scope, wherein the sealing device includes an adhesive applied to a flat sheet material. 7. The flexible packaging according to item 5 of the scope of patent application, wherein the sealed package Page 24 旮 5 2 5 6 3 VI. Scope of patent application includes a sub-sheet of adhesive tape attached to a cover sheet. — 8. The flexible packaging according to item 5 of the scope of patent application, wherein the sealing device includes electrostatic attraction. 9. The flexible packaging according to item [Scope of patent application], wherein the flat sheet material includes a polymer, which is selected from the group consisting of polyethylene, polypropylene_ 1 = 0. According to the scope of patent application No. 1 The flexible packaging of item, wherein the fragile lines are formed by perforations. Π. A method of manufacturing an elastic package for containing and dispensing a product in the shape of a product and the steps thereof include: Ca) providing a rectangular elastic polymer sheet of an appropriate size, the sheet having a first dimension defining the First and second opposite sides and third and fourth opposite sides defining a second dimension; (b) forming at least two lines of fragility, both of which are positive from the first side in the direction of the second side (C) placing a stack of sheet products on the polymer sheet, the sheet product being centered relative to the first and second sides; (d) folding the polymer The first part of the sheet is configured such that the fourth side edge is approximately parallel to the second side edge, and its folded position is approximately at a length from the third side edge / 3, so a pocket area is formed to accommodate the stacked sheet product. (E) Fold the second part of the polymer sheet so that the third side edge is arranged approximately parallel to the fourth side edge, and its folding position is about 3 lengths from the fourth side edge to form a first One and two opposite side edges of the three-fold packaging; and 1 > Page 25 6. Scope of patent application (f) Join a part of the third folded polymer sheet, the part is close to the first and second opposite side edges. 1 2. The method according to item 11 of the scope of patent application, wherein the fragile line is formed by a perforation. 1 3. The method according to item Π of the patent application scope, wherein the first size is larger than the second size. Page 26