TW434352B - Package sheet, packaging method using the sheet, and method of manufacture of laminated sheets - Google Patents

Abstract

To enable a partial layer to be left without showing any breakage even if a packaged item shows its load shifting, prevent any hole from being opened and so prevent either water or dust from entering the packaged item. This packaging sheet is made such that a first synthetic resin layer 3, a paper layer 5 and a second synthetic resin layer 7 are laminated in sequence to constitute a packaging sheet 1. The first synthetic resin layer 3 and the paper layer 5 are completely adhered to each other. The paper layer 5 and the second synthetic resin layer 7 are temporarily adhered to each other. A peeling-off strength between the paper layer 5 and the second synthetic resin layer 7 is set 2-500 gf/5 cm. In the case that the packaged item is to be packaged with application of this packaging sheet, the second synthetic resin layer 7 is set to be outside. Even if the packaged item is displaced to damage the first synthetic resin layer 3 and the paper layer 5, the second synthetic resin layer 7 is peeled off to prevent damage, and water or dust can be prevented from entering.

Description

Printed by the Central Bureau of Standards, Ministry of Economic Affairs, Shellfish Consumer Cooperative, 43435 2 A7 ____B7___ V. Description of the Invention (丨) [Technical Field to which the Invention belongs] The present invention relates to, for example, the handling of flat paper produced by paper manufacturers, etc. For packaging sheets used for storage, etc., a packaging method using the packaging sheets, and a method for manufacturing laminated sheets "[Knowledge] When transporting, storing, etc. flat paper made by paper manufacturers, etc., hundreds of The left and right flat judgment papers are individually packaged with wrapping paper, and the individual packages are stacked on a pallet. Next, the outer periphery of each of the stacked individual packages is packaged in a thin sheet for packaging (outer peripheral package). As the sheet for packaging, a so-called polyethylene laminated paper in which a synthetic resin such as polyethylene is laminated on a paper material, or a so-called polyethylene laminated paper in which a paper material is laminated on both sides of a synthetic resin such as polyethylene is used. These polyethylene laminated papers and polyethylene interlayer papers have a synthetic resin layer, so that moisture is not transmitted at all, and they have excellent moisture resistance. Therefore, it is possible to prevent the intrusion of water or dust into the interior of the packaging sheet by winding it around the periphery. In addition, the thin sheet for packaging is excellent in strength because it has a synthetic resin layer, and it is possible to prevent deformation of the individual packages to a considerable extent under load. However, if a strong impact is applied during transportation, even if the outer roll is wrapped by a packaging sheet, individual packages may be deformed under load. Due to this load deformation, if a load is applied to a part of the packaging sheet (especially a part that comes into contact with a corner portion of the individual packaging body), a hole may be formed. If there are openings, water or angstroms will penetrate into the interior from this part. In order to prevent the intrusion of water or dust even if there are openings in the packaging sheet, the entire package can be covered with a film bag made of synthetic resin or the like after being wrapped with the packaging sheet. (Please read the precautions on the back before filling in this page) The size of the paper used for this edition applies to the Chinese National Standard (CNS) Λ4 is now available (210X297) While it is printed by the Employees ’Cooperatives of the China Central Standards Bureau of the Ministry of Economic Affairs 4 3435 2 V. Invention Explanation (>) [Problems to be Solved by the Invention] However, if a film bag is used, a so-called double package is formed, which causes a troublesome problem compared to a case where the outer periphery is only wrapped with a thin sheet roll for packaging. 0 This invention In view of the above-mentioned problems, an object of the present invention is to provide a packaging sheet that does not cause openings to cause water or dust to penetrate inside even when a load is applied, and a packaging method using the packaging sheet. Still another object of the present invention is to provide a method for manufacturing a laminated sheet β suitable for the sheet for packaging. [Method for solving the problem] The present invention for achieving the above-mentioned object is a sheet for packaging. A first synthetic resin layer is provided on one side, and a second synthetic resin layer is provided on the other side, and the paper layer and the second synthetic resin layer are in a state to be adhered (the first patent application scope). In this sheet for packaging, since the paper layer and the second synthetic resin layer are in a state of being brought into contact with each other, the second synthetic resin layer can be easily peeled from the paper layer. Because-· · Therefore, as long as the packaging sheet is used to package the packaged product (item 5 of the scope of the patent application), even if the packaged product is deformed due to load, the paper layer and the first synthetic resin layer are damaged, and the load due to deformation is The second synthetic resin layer peeled from the paper layer can be prevented from being damaged. Therefore, the packaging sheet is not perforated as a whole, and water or dust can be prevented from entering the interior. Therefore, it is possible to omit packaging of the second layer such as a film bag. As the intended state of the paper sheet and the second synthetic resin layer, it is preferable to adjust the peel strength of the two sheets to be 2gf / 5cm or more and 500gf / 5cm or less. (This page)

The size of this paper applies the Chinese National Standard (CNS) Λ4 specification (210X297 enthalpy) Printed by the Industrial and Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs ^ 34352_hL _____ 5. Description of the invention (々) Please refer to item 2 of the patent scope). In addition, in order to achieve another invention of the above-mentioned object, a packaging sheet is provided, in which a first base material layer is provided on one side of an intermediate layer of a synthetic resin, and a second base material layer is provided on the other side. . The second substrate layer system is in a pseudo-adhesive state (item 3 in the scope of the patent application). In the packaging sheet, the synthetic resin intermediate layer and the second substrate layer system are in a pseudo-adhesion state. Easily peeled from the synthetic resin intermediate layer. Therefore, as long as the packaging material is packaged using the packaging sheet (item 5 in the scope of patent application), even if the packaging material is damaged due to load deformation, the second substrate layer is damaged due to the deformed load. Damage to the peeled synthetic resin intermediate layer and the first base material layer can be avoided. Therefore, it is possible to prevent perforation of the entire packaging sheet and prevent water or dust from entering the interior. Therefore, packaging using a second layer such as a film bag can be omitted. As the intended adhesion state of the intermediate layer of the synthetic resin and the second base material layer, it is preferable to adjust the peel strength of the intermediate resin layer to 2gf / 5cm to 500gf / 5cm (item 4 in the scope of patent application). Such a sheet for packaging can be produced by extruding molten synthetic resin in a film shape between two rollers by a method for manufacturing a laminated sheet, and supplying the first substrate layer from one of the roller sides, and from the other A second base material layer is supplied on one roller side, and the first base material layer, the synthetic resin, and the second base material layer are laminated and bonded with a flange between the rollers, and is characterized in that the molten synthetic resin is abutted on a roller The first base material layer of the first, and then the molten synthetic resin abuts the second base material layer on another roller; _____6 (Please read the precautions on the back before filling this page) The paper size is applicable to Chinese national standards ( CNS) 8-4 specifications (210X297 gong) Printed by the Central Consumers' Bureau of the Ministry of Economic Affairs, Monthly Consumer Cooperatives ^ 34 3 5 2 a? B7 V. Description of the invention (middle) Manufactured (item 6 of the scope of patent application) "[ Embodiments of the invention] Hereinafter, the present invention will be described with reference to the drawings. Fig. 1 is a sectional view showing a part of a packaging sheet according to an embodiment of the present invention. The packaging sheet 1 is formed by laminating a first synthetic resin layer 3, a paper layer 5 and a second synthetic resin layer 7 in this order. The first synthetic resin layer 3 and the paper layer 5 are in a completely bonded state. On the other hand, the paper layer 5 and the second synthetic resin layer 7 are in a pseudo-adhesive state. The first synthetic resin layer 3 is composed of a resin composition mainly composed of a synthetic resin. As the synthetic resin used for the first synthetic resin layer 3, there may be mentioned polyethylene, polypropylene, polymethylpentene, ethylene vinyl acetate resin, ethylene ethyl acrylate resin, ethylene acrylic resin, ethylene methacrylic resin, and ethylene. Examples are methyl acrylate resin, ionomer, and the like. Although the thickness of the first synthetic resin layer 3 is not particularly limited, it is, for example, about 10 / zm or more and about 100 jCim or less. Paper layer 5 can use paper materials such as unbleached kraft paper, bleached kraft paper, high-quality paper, medium-quality paper, one-sided bright unbleached kraft paper, pure white paper roll, cellophane and the like. Although the basis weight of the paper layer 5 is not particularly limited, it is, for example, about 30 g / m2 to 150 g / m2. The second synthetic resin layer 7 is composed of a resin composition mainly composed of a synthetic resin. Examples of the synthetic resin used for the second synthetic resin layer 7 include polyethylene, polypropylene, polymethylpentene, ethylene vinyl acetate resin, ethylene ethyl acrylate resin, ethylene acrylic resin, ethylene methacrylic resin, and ethylene. Examples are methyl acrylate resin, ionomer, and the like. First 7 (1ί · Please read the notes on the back before filling this page)

The size of this paper is applicable to China National Standard (CNS) grid (210 × 297 gong) Printed by the Central Bureau of Standards of the Ministry of Economic Affairs® ldg Consumer Cooperatives 4 3 ^ 35 2 5. Description of the invention ($) The thickness of the synthetic resin layer 7, It is preferably 20 gm or more and 200 gm or less, and more preferably 40 gm or more and 100 # m or less. If the thickness is less than the above range, when the first synthetic resin layer 3 and the paper layer 5 are damaged as described later, the second synthetic resin layer 7 may be damaged. Conversely, if the thickness exceeds the above range, the thin sheet 1 for packaging will become hard, so that it will not be easily tortuously wrapped. "When using the thin sheet 1 for packaging, the outer periphery of the individual packaging body of the judging paper is rolled, although there is no particular limitation. For example, the upper side in FIG. 1 is taken as the inner side, and the lower side in FIG. 1 is taken as the outer side. If individual packages are deformed under load, the first synthetic resin layer 3 and the paper layer 5 are completely adhered, so that damage occurs at approximately the same position. At this time, since the paper layer 5 and the second synthetic resin layer 7 are in a pseudo-adhesive state, the second synthetic resin layer 7 is peeled from the paper layer 5 and is prevented from being damaged. Therefore, perforation does not occur in the packaging sheet 1 as a whole. In addition, the remaining second synthetic resin layer 7 can prevent the intrusion of water or dust into the interior. The so-called pseudo-adhesion state represents the adhesion state between the paper layer 5 and the second synthetic resin layer 7, and the degree of separation of the second synthetic resin layer 7 from the paper layer 5 is higher than the breaking of the second synthetic resin layer 7. Specifically, the bonding strength of the paper layer 5 and the second synthetic resin layer 7 is adjusted to be 2 gf / 5 cm or more and 500 gf / 5 cm or less, preferably 5 gf / 5 cm or more and 100 gf / 5 cm or less. If the peel strength is less than the above range, peeling of the paper layer 5 and the second synthetic resin layer 7 may occur during the manufacturing stage or storage stage of the packaging sheet 1, which may cause difficulties in the operation of wrapping the peripheral sheet 1. . Conversely, if the peeling strength exceeds the above range, it is possible that the paper layer 5 and the second synthetic resin layer 7 will not peel off under load, and accompanied by (Please read the precautions on the back before filling this page). —The paper size of the edition applies to the Chinese national standard (CNS > Λ4 specification (210X297 gong > printed by the staff consumer cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 4 3435 2 A7 _ C _ΙΪ7) 5. Description of the invention (b) a synthetic resin layer The breakage of 3 and the paper layer 5 will also cause the breakage of the second synthetic resin layer 7. The method for measuring the peel strength will be described here. First, the packaging sheet 1 is pre-treated according to JIS-P8111, and cut into a width of 50 mm, A test piece was obtained by measuring 200 mm in length. One side of the test piece was affixed to a metal plate with double-sided tape, and the metal plate was set so that the longitudinal direction of the test piece was vertical. Next, the lower portion of the test piece was set. After peeling, the peeling layer was rolled up to a certain extent, and the sandwiched part was stretched upward at a stretching speed of 200 mm / miii, and peeled off at 50 mm. The stress during the measurement was measured, and the average stress was measured. As peeling strength The use of the sheet 1 is not limited to the wrapping of the individual packages described above. For example, the sheet 1 for packaging may be used to individually package the packaged material. Even in this case, the load from the outside or inside is only Part of the packaging sheet 1 may be damaged, and part of the sheet 1 may be prevented from being damaged. Therefore, moisture absorption and contamination of the packaged material can be prevented. If the packaging sheet 1 is used, for example, hundreds of sheets of paper will be judged. For the packaging, since the first synthetic resin layer 3 or the second synthetic resin layer 7 is located at the outermost side, when the individual packages are stacked on the pallet, the first synthetic resin layer 3 or the second synthetic resin layer 7 may interfere with each other. In this way, since the friction coefficient of synthetic resin is larger than that of general paper materials, it is possible to suppress the deformation of the load between individual packaging bodies. In addition, the thin sheet 1 for packaging, such as packaging asphalt, is used for packaging with adhesiveness. It can also be packaged with the second synthetic resin layer 7 as the inside. In this way, the second synthetic resin layer 7 will be attached to the asphalt. And _9____ This paper size applies Chinese national standards CNS) A4 size {21〇X: 2M public enthalpy > (Please read the Notes on the back to fill out this page)

It is printed by the Consumer Cooperative of the Central Bureau of Quasi-Economic Bureau of the Ministry of Economic Affairs. When the asphalt is taken out, the second synthetic resin layer 7 is peeled off from the paper layer 5 and taken out with the asphalt, making it easier to take out the asphalt. Although the second synthetic resin layer adhering to the asphalt is maintained in this state and mixed with the asphalt ', since the material of the second synthetic resin layer is a synthetic resin, it does not adversely affect the quality of the asphalt. Next, an example of a manufacturing method of the packaging sheet 1 will be described. First, the resin composition used to form the first synthetic resin layer 3 is melted and extruded from a τ die... In a film shape. Thereafter, the molten resin and the paper layer 5 are laminated and cooled. Next, the resin composition used to form the second synthetic resin layer 7 is melted and extruded from the T die into a film shape. Next, the molten resin and the paper layer 5 are laminated so that the paper layer 5 side is in contact with the molten resin, and then cooled. At this time, the temperature of the molten resin composition used to form the second synthetic resin layer 7 is lower, and the bonding strength of the paper layer 5 and the second synthetic resin layer 7 is weakened, so that the two can form a pseudo bond. status. Of course, it is also possible to arrange T-molds, rollers, etc. for lamination in series, lamination of the first synthetic resin layer 3 and the paper layer 5, and lamination of the paper layer 5 and the second synthetic resin layer 7 inline. . In order to obtain the temperature of the molten resin composition in the intended state, it is necessary to appropriately determine the type of synthetic resin used, the material of the paper layer 5, the specifications of the manufacturing equipment, and the like. For example, in order to obtain a pseudo-adhesive state using polyethylene, the general extrusion temperature of a molten resin composition is 200 ° C or higher and 30 ° C or lower, more preferably 240eC or higher and 270 ° C or lower. In addition to such a molten resin composition, In addition to temperature control, for example, by adopting ___10 this paper size applies Chinese National Standard (CNS) Λ4 ^ grid (210X2W enthalpy) {Please read the precautions on the back before filling this page) 2 A7 B7 Industrial and Consumer Cooperatives Co., Ltd. 5. Description of the invention (again) (1) Adding an additive that reduces the adhesion strength to the resin composition forming the second synthetic resin layer 7; (2) The first synthetic resin layer only on the paper layer 5 On the 3 side, pre-treatments such as corona treatment and ozone treatment are performed; (3) Only on the second synthetic resin layer 7 side of the paper layer 5, a release treatment or the like is performed, and the paper layer 5 and the second synthetic resin layer can also be made 7 Forming a Proposed Adhesion State> For the packaging sheet 1, for example, another layer may be provided on the upper side of the first base material layer 3, and another layer may be provided on the lower side of the second synthetic resin layer 7. Various changes may be made. Fig. 2 is a sectional view showing a part of a packaging sheet 9 according to another embodiment of the present invention. The packaging sheet 9 is formed by sequentially laminating a first base material layer 11, a synthetic resin intermediate layer 13, a paper layer 15 and a resin laminated layer Π. The paper layer 15 and the resin laminated layer II constitute a second base material layer 19. The first base material layer 11 and the synthetic resin intermediate layer 13 are completely formed. On the other hand, the synthetic resin intermediate layer Π and the second base material layer 19 are in a pseudo-adhesive state. The first base material layer 11 may be made of a resin film or a paper material. It is also possible to use a metal foil such as aluminum foil or a metal vapor-deposited paper. When the first base material layer 11 is a resin film, examples of the material include polyethylene, polypropylene, polymethylpentene, ethylene vinyl acetate resin, ethylene ethyl acrylate resin, ethylene acrylic resin, and vinyl nail. Based acrylic resin, ethylene methyl acrylate resin, ionomer polymer resin, polyethylene terephthalate, {Please read the precautions on the back before filling out this page) The size of this paper is applicable to China National Standards (CNS) Specification of Λ4 (210X29? Public waste) Λ7 Η7 Printed by the Central Industry Standards Bureau of the Ministry of Economy Monthly Industrial Cooperative Cooperatives 43.52 V. Description of the invention (γ) Nylon resin, polyvinyl chloride, etc. are taken as examples. When the first base material layer 11 is made of a paper material, examples thereof include unbleached kraft paper, bleached kraft paper, high-quality paper, medium-quality paper, one-sided bright unbleached kraft paper, pure white paper roll, and glass paper. The synthetic resin intermediate layer Π is composed of a resin composition containing a synthetic resin as a main component. As the synthetic resin used in the synthetic resin intermediate layer 13 may be mentioned polyethylene, polypropylene, polymethylpentene, ethylene vinyl acetate resin, ethylene ethyl acrylate resin, ethylene acrylic resin, ethylene methacrylic resin, ethylene acrylic acid Examples are methyl ester resin, ionomer polymer resin, and the like. Although the thickness of the synthetic resin intermediate layer 13 is not particularly limited, for example, it is about 15 # m to 100 # m. The paper layer 15 can be unbleached kraft paper, bleached kraft paper, high-quality paper, medium-quality paper, and one-sided bright unbleached kraft paper. , Pure white paper roll, cellophane and other paper materials. Although the weight per unit area of the paper layer 15 is not particularly limited, it is, for example, 30 g / m2 or more and 150 g / m2 or less. The resin laminate layer 17 is composed of a resin composition containing a synthetic resin as a main component. Examples of the synthetic resin used in the resin laminate layer 17 include polyethylene, polypropylene, polymethylpentene, ethylene vinyl acetate resin, ethylene ethyl acrylate resin, ethylene acrylic resin, ethylene methacrylic resin, and ethylene acrylic acid. Examples are methyl ester resin, ionomer polymer resin, and the like. Although the thickness of the resin laminate layer 17 is not particularly limited, it is, for example, 10 to 100 mm, and the β paper layer 15 and the resin laminate layer 17 constitute the second base material layer 19 as described above. For the base material layer 19, for example, the resin group forming the resin laminate layer Π (read the note f on the back side first and then fill in the WT page)

The size of this paper is applicable to the country ’s national standard (CNS) A4 specification (210 '乂 297 enthalpy) A7 B7 4 343 5 2 V. Description of the invention (π) The product is melted and extruded into a thin film.' The molten resin film It is laminated with a paper layer and then formed. The paper layer 15 and the resin laminate layer 17 are brought into a complete contact state. Although the outer periphery of the individual packaging body using the thin sheet 9 for wrapping is used to flatten the wrapping paper, it is not particularly limited. For example, the upper side in FIG. 2 is the inside and the lower side in FIG. 2 is the outside. If individual packages are deformed under load, the second substrate layer 19 may be damaged. At this time, since the synthetic resin layer 13 and the second base material layer I9 are in a pseudo-adhesive state, the synthetic resin intermediate layer 13 and the first base material layer 11 are peeled off from the second base material layer 19 and are not damaged. Therefore, perforation does not occur in the packaging sheet 9 as a whole. In addition, the remaining synthetic resin intermediate layer 13 and the first base material layer 11 can prevent the intrusion of water or dust into the interior. The so-called “adhered state” represents the bonding of the synthetic resin intermediate layer 13 and the second base material layer 19. The state is such that the peeling of the synthetic resin intermediate layer π from the second base material layer 19 takes precedence over the breakage of the synthetic resin intermediate layer 13 and the first base material layer 11. Specifically, the bonding state of the synthetic resin intermediate layer 13 and the second base material layer 19 is adjusted to be 2 gf / 5 cm or more and 500 gf / 5 cm or less, and more preferably 5 gf / 5 cm or more and 100 gf / 5 cm or less. If the peel strength is less than the above range, peeling of the synthetic resin intermediate layer 13 and the second base material layer 19 may occur during the manufacturing stage or storage stage of the thin sheet for packaging 9 and cause difficulties in peripheral roll-up operations. If the peel strength exceeds the above range, it is possible that the synthetic resin intermediate layer 13 and the second base material layer 19 will not peel under load, and the breakage of the second base material layer 19 will also cause the synthetic resin intermediate layer 13 and Fracture of the first base material layer 11. 13 This paper size applies Chinese National Standard (CNS) Λ4 specifications ^ 210X297 gong) (Please read the notes on the back before filling this page) Order 1-· Central Standards Bureau of the Ministry of Economy Printed by the Bureau of Standards, Consumer Cooperatives 2 a? _Β7_ V. Description of the invention The thin sheet 9 for packaging is obtained by melting the resin composition forming the synthetic resin intermediate layer 13 and extruding it in a thin film shape. The first base material layer 11 is laminated on one side of the resin film, and the second base material layer 19 is laminated on the other side of the molten resin film, thereby being formed. At this time, as long as the first base material layer 11 is a resin film, since the material of the first base material layer 11 and the synthetic resin intermediate layer .13 are both synthetic resin ', they can be integrated to form a strong bond. In addition, by working hard on the material of the resin film used, various functions such as a reinforcing function can be imparted to the thin sheet 9 for packaging. The packaging sheet 9 is similar to the packaging sheet 1 shown in Fig. 1 and can be used for various applications such as wrapping paper for individual packaging, except for wrapping in individual packages on a pallet. In order to make the synthetic resin intermediate layer 13 and the second base material layer 19 into a pseudo-adhesive state, for example, (1) the temperature of the molten synthetic resin at the moment when the synthetic resin intermediate layer 13 and the second base material layer 19 are bonded can be made lower. (2) pre-cooling the second base material layer 19 so that the temperature of the second base material layer 19 at the moment when the synthetic resin intermediate layer 13 and the second base material layer 19 are bonded to each other becomes low; (3) the second base material The upper side of the paper material 15 of the material layer 19 is subjected to a release process t-treatment; and other methods. The packaging sheet 9 can be changed in various ways, for example, by providing another layer 'on the upper side of the first base material layer 11 or another layer on the lower side of the second base material layer 19. _ 14 {Please read the notes on the back before filling in this page} The paper size of the book is applicable to the countries with difficulty (CNS > Λ4 specification (2 丨 0X2 people's public welfare) Α7 Κ7 5. 52 Description of the invention (θ) Next, an example of a manufacturing method of the packaging sheet 9 shown in FIG. 2 will be described with reference to FIG. 3. This manufacturing method is applicable to the first base material layer 11 made of a paper material to manufacture a package. In the case of the thin plate 9. In FIG. 3, symbol 21 represents a pressure roller, and symbol 23 represents a cooling roller. The pressure roller 21 rotates clockwise in FIG. 3, and the cooling roller 23 rotates counterclockwise in FIG. 3. Pressure An inter-roller flange 25 is formed between the drum 21 and the cooling drum 23. The resin composition forming the synthetic resin intermediate layer 13 is melted and extruded from a T die into a film shape, and the molten resin film 29 is supplied to the pressure drum 21 side. On the first substrate layer 11. The first substrate layer 11 and the molten resin film 29 are moved to the inter-roller flange 25 by the rotation of the pressure roller 21, and the second substrate on the cooling roller 23 here Layer 19 is laminated. Next, the molten resin is thin 29 is cooled and solidified by the cooling roller 23 to form a synthetic resin intermediate layer 13. In this way, the first base material layer η, the synthetic resin intermediate layer I3, and the second base material layer 19 are sequentially laminated to produce a packaging sheet 9. In this manufacturing method, the molten resin film 29 extruded from the T die 27 is first abutted against the first base material layer 11. Then, after the molten resin film 29 is cooled to a considerable extent, it is abutted against the second base material layer 19. At the stage of contact with the second base material layer 19, since the molten resin film 29 is formed to a certain low temperature, the synthetic resin intermediate layer Π and the second base material layer 19 can be brought into a pseudo-adhesive state. This is so simple. The present manufacturing method for achieving the intended adhesion state is applicable not only to the packaging sheet 9 but also to the production of laminated sheets for various uses in the intended adhesion state, such as postcard paper that has been opened by myself. [Effects of the Invention] Present Paper Again applicable to China National Standards (CNS) Μ said grid (210 × 2 are public) (锖 Please read the note on the back before filling this page)

^ 343 5 2 Α7 Β7 In the Ministry of Economic Affairs, the Ministry of Economic Affairs, the Ministry of Economic Affairs, Cooperatives, Cooperatives, and Cooperatives. 5. Description of the Invention (θ) As explained above, as long as the packaged material is packaged in the packaging sheet of the present invention, even under load In some cases, there will still be some unbroken layers, so no through-holes will occur in the packaging sheet. Therefore, water, dust, etc. cannot enter the interior. Moreover, according to the manufacturing method of the laminated sheet of this invention, the pseudo-adhesion state of a laminated sheet can be easily achieved. [Brief Description of the Drawings] Fig. 1 is a sectional view showing a part of a packaging sheet according to an embodiment of the present invention. Fig. 2 is a sectional view showing a part of a packaging sheet according to another embodiment of the present invention. Fig. 3 is a wedge diagram showing an example of a method for manufacturing the packaging sheet shown in Fig. 2. [Description of Symbols] 1, 9 ... Sheet for packaging 3 ... First synthetic resin layer 5 '15 ... Paper layer 7 ... Second synthetic resin layer 11 ... First base material layer 13 ... Synthetic resin intermediate layer Π ... Resin laminate layer 19 ... the second substrate layer 21 ... the pressure roller 23 ... the cooling roller 25 ... the flange between the rollers ^ 1 (谙 read the precautions on the back before filling in this page)

This paper scale is applicable to China's national standard (CNS) Λ4 is present (210X297 public capital) 4 3435 2 V. Description of the invention (a) 27 ... T-mode 29 ... Fused resin film (Please read the precautions on the back before filling this page ) Order ^ 1. Printing policy of the Central Government Bureau of the Ministry of Economic Affairs, Consumer Cooperatives 7 11 This paper size is applicable to China's National Building System (CNS) Mil grid (2 丨 0X297 enthalpy)

Claims (1)

43435 2 The central gradient of the Ministry of Economic Affairs is the Pui Gong Consumer Cooperative Indo-American 7.1 Fanyuan 1. A thin sheet for packaging, with a first synthetic resin layer on one side of the paper layer and a second synthetic resin on the other side Layer, the paper layer and the second synthetic resin layer are in a pseudo-adhesive state. 2. For example, the packaging sheet of the scope of patent application, wherein the peel strength of the paper layer and the second synthetic resin layer is 2gf / 5cm or more and 500gf / 5cm or less. 3. A kind of packaging sheet made of synthetic resin A first base material layer is provided on one side of the intermediate layer, and a second base material layer is provided on the other side. The intermediate layer of the synthetic resin layer and the second base material layer form a pseudo-adhesion state. 4. For the sheet for packaging according to item 3 of the application, in which the peel strength of the synthetic resin intermediate layer and the second base material layer is 2gf / 5cm or more and 500gf / 5cm or less 5. 5. A packaging method, which is an application A sheet for packaging according to any one of the scope of patents 1 to 4 for packaging a packaged object "6. A method for manufacturing a pressed sheet is to extrude molten synthetic resin into a film and supply it between the two rollers, The first base material layer is supplied from one of the roller sides', and the second base material layer is supplied from the other roller side, and the first base material layer, the synthetic resin, and the second base material layer are housed and bonded by rollers; It is characterized in that the molten synthetic resin is abutted against a first substrate layer on a roller, and then the molten synthetic resin is abutted against a second substrate on another roller 餍. 1 This paper scale is applicable to the Chinese country 棂Car (CNS > 210X297 mm) (Please read the note above and then fill out this page) ί τ