WO2002087875A1 - Feuille transparente et boite transparente utilisant cette feuille - Google Patents

Feuille transparente et boite transparente utilisant cette feuille Download PDF

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Publication number
WO2002087875A1
WO2002087875A1 PCT/JP2002/003831 JP0203831W WO02087875A1 WO 2002087875 A1 WO2002087875 A1 WO 2002087875A1 JP 0203831 W JP0203831 W JP 0203831W WO 02087875 A1 WO02087875 A1 WO 02087875A1
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WO
WIPO (PCT)
Prior art keywords
layer
transparent sheet
transparent
cellophane
sheet
Prior art date
Application number
PCT/JP2002/003831
Other languages
English (en)
Japanese (ja)
Inventor
Mieko Nasu
Tatsuo Sato
Original Assignee
Shiseido Company, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2001305324A external-priority patent/JP3670605B2/ja
Priority claimed from JP2001327780A external-priority patent/JP2003127303A/ja
Priority claimed from JP2002092578A external-priority patent/JP2003019771A/ja
Application filed by Shiseido Company, Ltd. filed Critical Shiseido Company, Ltd.
Publication of WO2002087875A1 publication Critical patent/WO2002087875A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin

Definitions

  • the present invention relates to a transparent sheet and a transparent case using the same, and more particularly, to a transparent sheet suitable for storing appropriate articles such as cosmetic tools and cosmetic containers, and a transparent case using the sheet.
  • the transparent case made of polyethylene terephthalate, polypropylene, etc. becomes unnecessary immediately after purchasing the product.
  • the treatment method for unnecessary transparent cases differs depending on the local government, there is a problem that the transparent case becomes incombustible waste in any treatment method.
  • biodegradable materials are attracting attention as transparent case materials.
  • cellophane and polylactic acid are mentioned as biodegradable materials.
  • the transparent case is manufactured by using a sheet on which a firewood wire for folding is formed (hereinafter, this may be referred to as a sheet containing a wire) and bending the sheet along the wire for folding. Have been.
  • Fig. 1 is a diagram showing an example of a conventional sheet with a bright line.
  • Sheet 1 is installed on both outer sides. Intermediate layers 4, 5, and 6 are laminated between the outermost layers 2 and 3 that are provided.
  • the bending & wire is generally composed of a wire processing portion 7 formed on the sheet 1 as shown in FIG. 1, and is formed over the entire width of the portion to be bent.
  • Such a go-line processing section 7 is formed by using a purl line blade described later, pressing the sheet 1 between the ⁇ -line blade and a flat pedestal, and denting the sheet 1 in its thickness direction.
  • the middle layers 4, 5, and 6 of the sheet 1 come into direct contact with external air after bending, and There was a problem that appearance was not good.
  • a sheet is manufactured by laminating a plurality of layers, but in the conventional sheet 1, since the assault line processing portion 7 is exposed to the outside, There is a problem that the laminated sheets are peeled off (delamination).
  • a sheet 1a as shown in FIG. 2 is used in the conventional transparent case.
  • the sheet la is made of, for example, a polyolefin having transparency on the surface of a resin film 4a made of cellophane or polylactic acid. The weakness of highly transparent resin films, such as cellophane without moisture resistance and polylactic acid without impact resistance, is compensated for by laminating resin film 2a.
  • the polyolefin-based resin film 2a has a problem that the adhesion to different materials, for example, the adhesion of a printing ink or the adhesion to a resin film during printing is poor.
  • corona discharge treatment is performed on both surfaces of the olefin resin film 2a.
  • the polyolefin resin film 2a is usually stored in a state where the polyolefin resin film 2a is wound in a roll shape.
  • the present invention has been made in view of the above problems, and has as its object to provide a transparent sheet that is environmentally friendly, has sufficient strength, has good moisture resistance, and a transparent case using the same. Further, another object of the present invention is to provide a transparent sheet containing a line, which has good appearance and does not cause delamination, and a transparent case using the same.
  • the present invention provides a transparent sheet which prevents adhesion between polyolefin-based resin films, and which does not impair the transparency when the polyolefin-based resin film is bonded to a resin film made of, for example, polylactic acid.
  • the purpose is to provide a transparent case that uses.
  • the transparent sheet according to the present invention comprises a cellophane layer or a polylactic acid layer, and a synthetic resin layer bonded to one or both surfaces of the cellophane layer or the polylactic acid layer.
  • the transparent sheet uses biodegradable cellophane or polylactic acid, it can be made an environmentally friendly transparent sheet, and the synthetic resin layer is a cellophane layer or a polylactic acid layer. Since it is bonded to a transparent sheet, a transparent sheet having sufficient strength and good moisture resistance can be obtained.
  • the transparent sheet according to the present invention is characterized in that, in the transparent sheet described above, the cellophane layer or the polylactic acid layer is laminated in multiple layers.
  • the cellophane layer or the polylactic acid layer is laminated in multiple layers, a transparent sheet having more sufficient strength can be obtained.
  • the synthetic resin as a material of the synthetic resin layer is a tensile elongation at break of cellophane or polylactic acid as a material of the cellophane layer or the polylactic acid layer. Having a higher tensile elongation at break, with the cellophane layer or the polylactic acid layer as the middle layer, and providing the synthetic resin layers as outermost layers on both outer sides of the middle layer, without breaking the outermost layer, Further, it is characterized in that it has a bent line portion for a bent layer formed by breaking at least a part of the middle layer.
  • the material of the synthetic resin layer is a polyolefin resin
  • the cellophane layer or the polylactic acid layer A polyolefin-based resin film is bonded to at least one surface of the resin film, the polyolefin-based resin film has a textured surface on a side facing the resin film, and the resin film is formed of the polyolefin-based resin film.
  • the resin film is characterized in that the resin film is bonded to the textured surface via an adhesive layer having substantially the same refractive index as the polyolefin resin film.
  • the adhesion between the films can be prevented when the polyolefin-based resin film is stored or the like by reducing the contact area between the films by providing unevenness on the bonding surface of the polyolefin-based resin film.
  • the cellophane is formed through an adhesive layer having a refractive index substantially the same as that of the polyolefin-based resin film when forming the sheet. The transparency can be restored by laminating the resin film comprising a layer or a polylactic acid layer.
  • a transparent case according to the present invention comprises the above transparent sheet.
  • FIG. 1 is a cross-sectional view of a conventional ⁇ ⁇ -lined sheet.
  • FIG. 2 is a cross-sectional view of a conventional transparent sheet.
  • FIG. 3 is a diagram showing a state in which a polyolefin resin film used for a conventional transparent sheet is wound into a roll.
  • FIG. 4 is a perspective view of a transparent case using the transparent sheet according to the present invention.
  • FIG. 5 is a partial view of the transparent sheet according to the present invention.
  • FIG. 6 is a cross-sectional view of a sheet for explaining the state of the g-line-containing sheet according to the present invention at the time of processing of the extra line.
  • FIG. 7 is a cross-sectional view of the sheet with ⁇ lines according to the present invention.
  • FIG. 8 is a cross-sectional view of the sheet according to the present invention, showing a state where the sheet is bent.
  • FIG. 9 is an exploded view of a transparent case using the sheet with ⁇ lines according to the present invention.
  • FIG. 10 is an assembly view of a transparent case using the firewood-lined sheet according to the present invention.
  • FIG. 11 is a cross-sectional view of the transparent sheet according to the present invention.
  • FIG. 12 is a cross-sectional view of the transparent sheet according to Example 1 of the present invention.
  • FIG. 13 is a cross-sectional view of a transparent sheet according to Example 2 of the present invention.
  • FIG. 14 is a cross-sectional view of a transparent sheet according to Example 3 of the present invention.
  • FIG. 15 is a sectional view of a transparent sheet according to Example 4 of the present invention.
  • FIG. 16 is a sectional view of a transparent sheet according to Example 5 of the present invention.
  • FIG. 17 is a sectional view of a transparent sheet according to Example 6 of the present invention.
  • FIG. 18 is a sectional view of a transparent sheet according to Example 7 of the present invention.
  • FIG. 19 is a sectional view of a transparent sheet according to Example 8 of the present invention.
  • FIG. 20 is a sectional view of a transparent sheet according to Example 9 of the present invention.
  • FIG. 21 is a cross-sectional view of a transparent sheet according to Example 10 of the present invention.
  • FIG. 22 is a cross-sectional view of the transparent sheet according to Example 11 of the present invention.
  • FIG. 23 is a cross-sectional view of a transparent sheet according to Example 12 of the present invention.
  • FIG. 24 is a cross-sectional view of a transparent sheet according to Example 13 of the present invention.
  • FIG. 25 is a graph showing the tensile elongation at break.
  • FIG. 26 is a sectional view of a transparent sheet according to Example 15 of the present invention.
  • FIG. 27 is a cross-sectional view of a transparent sheet according to Example 16 of the present invention.
  • FIG. 28 is a cross-sectional view of a transparent sheet according to Example 18 of the present invention.
  • FIG. 29 is a cross-sectional view of a transparent sheet according to Example 19 of the present invention.
  • the transparent sheet of the present invention comprises a cellophane layer or a polylactic acid layer and a synthetic resin layer bonded to one or both sides of the cellophane layer or the polylactic acid layer.
  • the cellophane used in the present invention ordinary cellophane known as a cellulosic film can be used.
  • Cellophane thickness used in the present invention Although cellophane differs depending on the application, for example, cellophane having a thickness of 40 ⁇ is used.
  • the cellophane layer is formed of a single layer or a multilayer of cellophane.
  • the multilayer cellophane layer is formed by bonding cellophane in multiple layers with an adhesive.
  • the thickness of the cellophane layer is preferably 50% or more of the total thickness of the transparent sheet.
  • polylactic acid (borylactide) is used instead of cellophane, and polylactic acid having the same structure as the cellophane layer is used.
  • a layer may be formed.
  • the cellophane or polylactic acid may be called a biodegradable resin, and the cellophane layer or polylactic acid layer may be called a biodegradable resin layer.
  • the synthetic resin used in the present invention polyethylene terephthalate, polypropylene, polyethylene or the like can be used.
  • the synthetic resin layer is a layer made of the above synthetic resin.
  • biodegradable resin other than cellophane and polylactic acid is not excluded.
  • biodegradable resins maintain the same level of function as ordinary resins, but after use they are decomposed into low molecular weight compounds by the action of microorganisms existing in nature, and finally carbonated.
  • a polymer material that can be decomposed into inorganic substances such as gas and water can be used.
  • specific examples include biosynthetic biodegradable plastics such as polycaprolactone, polybutylene succinate, polyethylene succinate, and polyethylene terephthalate improved type.
  • the biodegradable resin layer is a layer made of the biodegradable resin.
  • the biodegradable resin layer is formed of a single layer or multiple layers of the biodegradable resin.
  • the multi-layered biodegradable resin is formed by laminating the biodegradable resin with an adhesive.
  • Cellophane and cellophane, cellophane layer and synthetic resin layer, cellophane layer and biodegradable resin layer, biodegradable resin and biodegradable resin, biodegradable resin layer and synthetic resin layer An adhesive can be used. Note that when bonding cannot be performed with an adhesive, bonding can be performed by welding or the like.
  • FIG. 4 shows an example of a transparent case obtained from the transparent sheet according to the present invention.
  • the transparent sheet according to the present invention is The sheet is punched into a predetermined plane shape suitable for forming the final product, and the sheet is punched into this plane shape, and a folding wire (firewood wire processing section) is formed on a transparent sheet.
  • the folding wire is processed by pressing a wire drawing blade against a surface located inside when the transparent sheet is folded.
  • the transparent case 10 is formed by bending along the folding firewood wire.
  • the transparent case 10 according to the present invention is environmentally friendly.
  • the transparent case 10 has sufficient strength. Further, the transparent case 10 is transparent and allows the inside to be seen, so that the case is suitable for storing articles such as cosmetics.
  • the shape and size of the transparent case can be arbitrarily determined depending on the application.
  • a transparent case is formed using a transparent sheet composed of only a single layer of biodegradable resin.
  • a chemically synthesized biodegradable plastic as the biodegradable resin, an environment-friendly transparent case can be obtained.
  • the transparent sheet 12 has a structure in which outermost layers 14, 16 and three middle layers 18, 20, 22 are laminated.
  • the material of the outermost layers 14 and 16 of the transparent sheet 12 As the material of the outermost layers 14 and 16 of the transparent sheet 12, a resin having a tensile elongation at break higher than the elongation at break of the materials of the middle layers 18, 20, and 22 is used.
  • the material of the outermost layers 14, 16 has a tensile elongation at break of 200% or more, and the material of the middle layers 18, 20, 22 has a bow I elongation at break of less than 200%.
  • the tensile elongation at break of the material of the outermost layers 14, 16 be larger than the tensile elongation at break of the material of the middle layers 18, 20, 22. If the elongation is smaller than the tensile elongation at break of the material of the middle layers 18, 20, and 22, the outermost layers 14, 16 will break before the middle layers 18, 20, and 22 during wire drawing. This is because a ray cannot be formed only on 8, 20, and 22. Further, the tensile elongation at break of the material of the outermost layers 14 and 16 is preferably 200% or more, when the elongation at break of the material of the outermost layers 14 and 16 is less than 200%. This is because 16 tends to be broken at the time of wire drawing, and it becomes difficult to form a sheet with a collecting wire.
  • the material of the outermost layer 14, 16 of the transparent sheet 12 is the middle layer 18, 20, 22
  • Any resin may be used as long as it has a tensile elongation at break higher than the tensile elongation at break of the material of Example 22, such as polypropylene, polyethylene or polyethylene terephthalate. It is preferable to use.
  • the material of the middle layer 18, 20, 22 of the transparent sheet 12 may be any resin as long as it has a tensile elongation at break lower than that of the outermost layer 14, 16 material.
  • the »lined sheet of the present invention may have a three-layer structure including at least one outer layer and at least one outer layer, and another layer may be disposed in the intermediate layer as needed.
  • a three-layer structure in which two outermost layers and one middle layer are stacked, or a six-layer structure in which two outermost layers and four middle layers are stacked can be used. it can.
  • a sheet (transparent sheet) containing a black line in which a transparent line (formed portion) is formed on the transparent sheet 12 will be specifically described.
  • FIG. 6 is a cross-sectional view of the ⁇ ⁇ -lined sheet according to the present invention at the time of ⁇ -line processing.
  • FIG. 7 is a cross-sectional view of the ⁇ ⁇ -lined sheet according to the present invention.
  • FIG. 8 is a partial cross-sectional view showing a state where the S-line-containing sheet according to the present invention is folded. As shown in Fig. 6, by applying the wire blade 24 from the outermost layer 14 side of the transparent sheet 12 and pressing the wire blade 24 deeper than the thickness of the outermost layer 14, all the middle layers 18 Break, 20 and 22. As a result, the bending S-line processed part 26 shown in FIG. 7 is formed.
  • the material of the outermost layers 14 and 16 includes a resin having a breaking elongation higher than the material of the middle layers 18, 20 and 22, that is, the middle layers 18 and 20.
  • the outermost layers 14 and 16 do not break (continuous state) because they use a resin that stretches better than the material of 22.
  • the middle layers 18 and 20 and 22 break, respectively. .
  • a line-containing sheet (transparent sheet) 28 having a line-processed portion 26 generated by breaking only the middle layers 18, 20, and 22 is completed.
  • the voice line sheet 2 8 When used, as shown in FIG. 8, the outermost layer 16 is usually folded inside, but it is also possible to bend in the opposite direction, that is, with the outermost layer 14 on the cutting edge side inside.
  • a sheet 28 a with the bright line processed in accordance with the shape of the case shown in a development view in FIG. 9 is prepared, By assembling the ascending line sheet 28a, the transparent case 30 shown in FIG. 10 is completed. Note that, in FIG. 9, a broken line 32 indicates a ⁇ -line processed portion.
  • the synthetic resin as the material of the synthetic resin layer constituting the transparent sheet is a polyolefin resin
  • FIG. 11 is a diagram for explaining the transparent sheet according to the present invention.
  • the present invention described below is also applicable to sheets other than transparent sheets.
  • the transparent sheet 34 includes a transparent resin film 36 and a polyolefin resin film 38 bonded to at least one surface of the transparent resin film 36.
  • the polyolefin resin film 38 is adhered to only one side of the transparent resin film 36.
  • the transparent resin film 36 is a highly transparent resin film, and it is preferable to use a biodegradable resin film such as cellophane or polylactic acid in consideration of the environment. However, a non-transparent resin film may be used depending on the use conditions.
  • the polyolefin resin used in the polyolefin resin film 38 is, for example, a resin selected from the group consisting of ethylene copolymers such as polyethylene, polypropylene, ethylene monoacetate copolymer, and ethylene propylene copolymer. Alternatively, a mixture of two or more is used.
  • the thickness of the polyolefin resin film 38 is preferably from 60 ⁇ to 100 ⁇ m. When the thickness is in the range of 60 ⁇ to 100 ⁇ , the transparency of the transparent sheet 34 is ensured.
  • the polyolefin-based resin film 38 has a concave-convex processed surface 40 formed by performing a concavo-convex processing on a surface on the side arranged to face the transparent resin film 34 before bonding.
  • a concave-convex processed surface 40 formed by performing a concavo-convex processing on a surface on the side arranged to face the transparent resin film 34 before bonding.
  • the polyolefin resin film 38 is subjected to corona treatment on both sides similarly to the conventional example, in order to improve the adhesiveness.
  • the conditions of the corona discharge treatment performed using a corona discharge tube are preferably such that the primary voltage is 10 to 30 kV and the primary current is 2 to 6 A.
  • the corona discharge treatment machine used for the corona treatment may be any one of a spark gap system, a vacuum tube system, and a solid state system, and is not particularly limited.
  • the outer surface of the polyolefin-based resin film 38 that is not opposed to the transparent film 36 is also subjected to corona treatment in order to make it easier to ride ink during printing, but this outer surface is made of a polyolefin-based resin film. When forming the resin film 38, a mirror finish is applied.
  • the transparent sheet 34 is obtained by bonding the transparent resin film 36 to the uneven surface 40 of the polyolefin resin film 38 via the adhesive layer 42.
  • the adhesive layer 42 it is not necessary to use a special adhesive for the adhesive layer 42, but it is preferable that the adhesive is bonded to the polyolefin resin film 38 which forms the outermost layer (one side) of the transparent sheet 34.
  • the agent layer 42 is formed of a material having the same refractive index.
  • the transparent sheet 34 of the present invention is formed with a textured surface 40, a conventional polyolefin film, which has been subjected to a lip treatment on both sides, comes into close contact when rolled into a wool shape. Problem is solved. In this case, the transparency of the polyolefin-based resin film 38 itself is lost only by forming the textured surface 40, but the transparent sheet 34 as a whole is bonded by bonding through the adhesive layer 42. Sex can be restored.
  • the adhesive layer 42 is provided so as to be in contact with the uneven surface 40 of the polyolefin-based resin film 38, the adhesive layer 42 can be used for bonding to a film having a flat surface. As compared with the case, the contact area between the film and the adhesive is increased, and the adhesive strength between the transparent resin film 36 and the polyolefin resin film 38 can be improved.
  • the polyolefin resin extruded from the extruder and in a molten state is formed into a sheet by a cooling roll having a mirror surface and an uneven surface, and an uneven surface 40 is formed on one surface and a mirror surface is formed on the other surface.
  • the formed polyolefin resin film 38 is obtained.
  • the polyolefin resin film 38 formed into a sheet is subjected to corona discharge treatment using a corona discharge tube. After the corona discharge treatment, an adhesive application step is provided, and the adhesive is applied to form an adhesive layer 42.
  • the transparent resin film 36 is set so as to be sent out from a separately provided feed roll.
  • the sent transparent resin film 36 is pressure-bonded and joined so as to be in contact with the uneven surface 40 of the polyolefin-based resin resin film 38 that has been subjected to the corona discharge treatment. Then, a polyolefin resin film 38 is laminated thereon, and a transparent sheet 34 is obtained.
  • a transparent case is obtained by assembling the transparent sheet 34 in the same procedure as in the case of the transparent case 30 described above.
  • Examples 1 to 13 relate to the transparent sheet of the present invention comprising a cellophane layer or polylactic acid layer and a synthetic resin layer bonded to one or both sides of the cellophane layer or polylactic acid layer. This is an example.
  • a cellophane layer 44 composed of cellophane (thickness: 40 m) (made by Nineo Chemical Industries; ordinary cellophane PL # 500), a polyethylene terephthalate (thickness: 50 ⁇ ) was formed.
  • a synthetic resin layer 46 composed of Toyobo; Toyobo ester
  • An adhesive dissolved in an organic solvent is applied to at least one of the cellophane layer 44 and the synthetic resin layer 46 by a method, dried with hot air, and then bonded together (dry basis weight 2 gZm 2 ). Note that this bonding method is the same in the other embodiments described below, and a duplicate description will be omitted.
  • a 20 ⁇ thick polypropylene (Toyobo; “PYREN” film CT) is coated on one side of a cellophane layer 44 made of cellophane 40 ⁇ thick (Nichimura Chemical Co., Ltd .; ordinary cellophane PL # 500).
  • the synthetic resin layer 46 is bonded with an adhesive to form a transparent sheet.
  • a 20 m / zm thick polyethylene terephthalate (Toyobo; Toyobo Ester) was formed on both sides of a cellophane layer 44 made of cellophane 40 m in thickness (manufactured by Nimura Chemical Co., Ltd .; ordinary cellophane PL # 500).
  • the synthetic resin layer 46 is bonded with an adhesive to form a transparent sheet.
  • the same synthetic resin, polyethylene terephthalate is bonded to both sides of the cellophane layer 44. Different types of synthetic resins can be bonded together.
  • a cellophane layer 44 made of cellophane with a thickness of 40 inches has a polylactic acid layer made of polylactic acid with a thickness of 100 ⁇ (biodegradable).
  • Resin layer 48 is bonded with an adhesive to form a transparent sheet.
  • a transparent sheet is formed by bonding a polylactic acid layer 48 made of polylactic acid having a thickness of 100 m to both sides of a cellophane layer 44 made of cellophane having a thickness of 40 ⁇ m with an adhesive.
  • cellophane layers 44 each made of cellophane (Nichimura Chemical Co., Ltd .; ordinary cellophane PL # 500) having a thickness of 40 ⁇ are bonded together with an adhesive to form a cellophane multilayer body (cellophane layer).
  • cellophane layer a cellophane multilayer body
  • cellophane layers 44 made of cellophane (Nichimura Chemical Co., Ltd .; ordinary cellophane PL # 500) each having a thickness of 40 zm are bonded together with an adhesive to form a cellophane multilayer body (cellophane layer).
  • a synthetic resin layer 50 of 50 ⁇ thick polypropylene manufactured by Toyobo; “Pyrene” film CT is adhered to one side with an adhesive to form a transparent sheet.
  • cellophane layers 44 made of cellophane (Nichimura Chemical Co., Ltd .; ordinary cellophane PL # 500) each having a thickness of 40 / m are bonded together with an adhesive to form a cellophane multilayer body (cellophane layer).
  • a synthetic resin layer 50 of 50 / zm thick polypropylene manufactured by Toyobo; "Pyrene" film CT is bonded to both sides with an adhesive to form a transparent sheet.
  • a four-layer polylactic acid layer 48 made of polylactic acid with a thickness of 100 ⁇ is bonded together with an adhesive to form a biodegradable resin multilayer (biodegradable resin layer).
  • the biodegradable resin multilayer body is a transparent sheet.
  • a synthetic resin layer 50 made of polyethylene terephthalate (manufactured by Toyobo; Toyobo ester) having a thickness of 50 ⁇ is adhered to one side of a polylactic acid layer 48 made of polylactic acid having a thickness of 100 // m with an adhesive.
  • a polylactic acid layer 48 made of polylactic acid having a thickness of 100 // m with an adhesive is adhered to one side of a polylactic acid layer 48 made of polylactic acid having a thickness of 100 // m with an adhesive.
  • it is a transparent sheet.
  • all of the four polylactic acid layers 48 made of polylactic acid having a thickness of 100 Aim are bonded together to form a biodegradable resin multilayer body (biodegradable resin layer).
  • a synthetic resin layer 52 of 50 ⁇ thick polypropylene manufactured by Toyobo; “PYREN” film C ⁇
  • PYREN polypropylene
  • all of the four polylactic acid layers 48 made of polylactic acid having a thickness of 100 / zm are bonded together with an adhesive to form a biodegradable resin multilayer (biodegradable resin layer).
  • a synthetic resin layer 52 made of polypropylene (manufactured by Toyobo; Pyrene film CT) having a thickness of 50 m is attached to both sides with an adhesive to form a transparent sheet.
  • the six layers are bonded with an adhesive to form a transparent sheet.
  • the first and sixth layers are both synthetic resin layers 54 and 56 made of polypropylene (manufactured by Idemitsu Unitech; “Super Softy”) having a thickness of 80 ⁇ .
  • Each of the second to fifth layers is a cellophane layer 58, 60, 62, 64 made of cellophane (manufactured by Nimura Chemical Industries; moisture-proof cellophane AZ-2 # 300) having a thickness of 21 ⁇ .
  • Examples 14 to 17 are examples in which the transparent sheet has a firewood wire portion.
  • the physical properties of the sheet in each example were measured by the following methods.
  • the sample was cut into strips with a width of 10 mm, and the measurement length was set to 50 mm, and the specimen was processed at a tensile speed of 10 Omm / min by a tensile tester. The difference between the distance between the chucks when the sheet was broken and the measured length was divided by the measured length to determine the tensile elongation at break (%).
  • Figure 25 shows the tensile breaking elongation obtained as described above.
  • the folding strength (N) refers to the strength when the sheet is bent
  • the folding strength ratio (%) refers to the folding strength of the sheet after go-line processing (N). Fold strength (N).
  • the bending strength was determined by cutting out a sheet of 5 cm ⁇ 10 cm centering on the yellow line, fixing one side of the sample horizontally, and centering the other side in the width direction (25 mm from the end), and the black line. The pressure was applied at a position of 17 ⁇ 2 mm from the center, and the pressing force at that time was measured with a push-pull gauge.
  • Example 14 the three cellophane layers 18, 20, and 22 were laminated in multiple layers with an adhesive, and the polypropylene layers 14 and 16 were laminated on both sides thereof.
  • a transparent sheet as shown in 5 was produced.
  • the third layer (reference numeral 20) and the fourth layer (reference numeral 22), cellophane was used as a resin similarly to the second layer.
  • the fifth layer (reference numeral 16) is the outermost layer of the transparent case and uses the same resin as the first layer (the thickness of each layer of the transparent sheet is 80 111 for the first layer and 80 for the second layer).
  • the layer is 35 / im
  • the third layer is 35 ⁇
  • the fourth layer is 35 ⁇ m
  • the fifth layer is 80 ⁇ .
  • the transparent sheet is obtained by applying an adhesive melted in an organic solvent by a gravure roll coating method, drying with hot air, and laminating the first to fifth layers.
  • a beveled wire is used in order to prevent the polypropylene of the outermost layer 14 from being broken. was pressed.
  • a transparent sheet having a 5-wire processed portion 28 in which only the middle layers 18, 20, and 22 were broken was formed without breaking the outermost layers 14, 16 (in a continuous state).
  • the processing conditions were cold, but the processing can be performed by heating the S-line blade 24.
  • the thus obtained »lined sheet 28 was bent at the bent portion 28 with the cutting edge side outward, and good bending properties were obtained.
  • the first layer and the fifth layer constituting the force bending portion 28 for which the bending test was repeated 50 times were not broken at all.
  • Example 15 As shown in FIG. 26, four cellophane layers 18, 20, 22, and 23 were laminated in multiple layers with an adhesive, and polypropylenes 14 and 16 were laminated on both surfaces of the cellophane layers. A transparent sheet having a thickness of 300 was produced.
  • the third layer (reference numeral 20), the fourth layer (reference numeral 22), and the fifth layer (reference numeral 23) used cellophane as a resin similarly to the second layer.
  • the sixth layer (reference numeral 16) is the outermost layer of the transparent case, and is made of the same resin as the first layer.
  • the thickness of each layer of the transparent sheet is 80 ⁇ for the first layer, 35 ⁇ for the second layer, 35 / xm for the third layer, 35 ⁇ for the fourth layer, 35 ⁇ for the fifth layer, and 80 ⁇ for the sixth layer. is there.
  • the above transparent sheet was produced in the same procedure as the transparent sheet of Example 14. Further, a transparent case was produced using the above transparent sheet in the same procedure as in the transparent case of Example 14. The thus obtained transparent sheet with a valley line had good folding properties. In addition, cosmetics were placed in the obtained transparent case, and the strength was compared with that of the conventional clear case with S-rays of the same dimensions. I never did.
  • Example 15 when the bending strength ratio was measured, the bending strength of the sheet after the wire drawing was 0.9 ( ⁇ ) / the sheet before the wire drawing was 3.6 ( ⁇ ).
  • the folding strength ratio was 25 (%). As described above, the folding strength ratio is preferably 50% or less and 1.0 ( ⁇ ) or less.
  • Example 16 polypropylenes 14 and 16 were adhered to both surfaces of the polylactic acid layer 48 to produce a transparent sheet having a total sheet thickness of 300 ⁇ as shown in FIG.
  • the third layer (reference numeral 16) is the outermost layer of the transparent case, and is made of the same resin as the first layer.
  • the thickness of each layer of the transparent sheet is 100 ⁇ for the first layer, lOO / m for the second layer, and 100 ⁇ m for the third layer.
  • a transparent sheet and a transparent case were produced in the same procedure as in Example 14.
  • the S-line-containing transparent sheet thus obtained had good bending properties. Also obtained As a result of putting the cosmetics in the transparent case and comparing the strength with that of the conventional PP clear case having the same size as that of the conventional clear line, it is practically possible that no tearing or breakage will occur in the processed part of the plied wire. .
  • Example 17 three sheets of cellophane layers 18, 20, and 22 were laminated with an adhesive by using a sheet as previously shown in FIG. 1, and a polyethylene terephthalate layer 14, By pasting 16 together, a transparent sheet as shown in FIG. 5 having a total thickness of 255 ⁇ m was prepared.
  • the first layer formed the outermost layer of the transparent case, and used polyethylene terephthalate (trade name: “Teflex”, manufactured by Teijin, tensile elongation: 51%) as the resin.
  • polyethylene terephthalate trade name: “Teflex”, manufactured by Teijin, tensile elongation: 51%) as the resin.
  • cellophane was used as a resin similarly to the second layer.
  • the fifth layer is the outermost layer of the transparent case and is made of the same resin as the first layer.
  • each layer of the transparent sheet is 75 ⁇ for the first layer, 35 ⁇ for the second layer, 35 / im for the third layer, 35 ⁇ for the fourth layer, and 75 / im for the fifth layer.
  • a transparent sheet and a transparent case were produced in the same procedure as in Example 14. Since the tensile elongation at break of polyethylene terephthalate of the outermost layer 14 and the cellophane elongation at break of cellophane of the middle layers 18, 20, and 22 are very close as shown in FIG. It took me careful.
  • Examples 18 and 19 are examples in which the synthetic resin forming the transparent sheet is a polyolefin resin.
  • FIG. 28 is a diagram showing a transparent sheet in Example 18.
  • the transparent sheet is bonded to a transparent resin film 66 made of polylactic acid (trade name: “Reishia”, manufactured by Mitsui Chemicals, thickness 150 / zm) 66 and one surface of the transparent resin film 66.
  • Resin film made of polypropylene (trade name: "Supasofo Made by Idemitsu Unitite, thickness ⁇ ⁇ ⁇ ⁇ ⁇ ) 68.
  • the resin film 68 has a concave / convex processing surface 40 on which a concave / convex processing is performed on the side facing the transparent resin film 66.
  • the transparent film 66 is bonded to the uneven surface 40 of the resin film 68 via an adhesive layer 42.
  • the transparent sheet in this example is manufactured by the method described below.
  • After the corona discharge treatment, an adhesive application step is provided, and the adhesive is applied to form an adhesive layer 42.
  • the transparent resin film 66 is set so as to be sent out from a separately provided feed roll.
  • the resin film 68 is pressed and bonded to the fed transparent resin film 66 so as to be in contact with the uneven surface 40 of the resin film 68 subjected to the corona discharge treatment.
  • a transparent sheet in which a resin film 68 made of polypropylene is laminated on the transparent resin film 66 made of polylactic acid via the adhesive layer 42 is obtained.
  • a good case could be obtained.
  • FIG. 29 is a diagram showing a transparent sheet in Example 19.
  • the transparent sheet in this example is composed of four cellophane layers 70 made of cellophane (trade name: ordinary cellophane PL # 500, manufactured by Futmura Chemical Industries, each 40 ⁇ ).
  • a transparent resin film layer formed by laminating multiple layers using adhesives 42 and a resin film made of polypropylene laminated on both sides of the transparent resin film layer (trade name: “Super Softy J, Idemitsu Unitech, M) 72.
  • the resin film 72 has a textured surface 40 on which a textured surface is formed on the side facing the transparent resin film layer. Are bonded to the uneven surface 40 of the resin film 72 via the adhesive layer 42.
  • the above transparent sheet can be manufactured by the same manufacturing method as that of the transparent sheet of Example 18. When a transparent case was produced using the obtained transparent sheet, a favorable case could be obtained.
  • the transparent sheet since the transparent sheet is made of biodegradable cellophane, it can be made an environmentally friendly transparent sheet.Because it is formed by bonding cellophane in multiple layers, it has sufficient strength. It can be a transparent sheet.
  • a transparent sheet comprising a cellophane layer made of biodegradable cellophane and a biodegradable resin layer made of a biodegradable resin bonded to one or both sides of the cellophane layer.
  • biodegradable cellophane is used for the transparent sheet, making it an environmentally friendly transparent sheet.
  • the biodegradable resin layer is bonded to the cellophane layer, strength is improved. It is possible to obtain a transparent sheet having sufficient transparency.
  • a transparent sheet having a biodegradable resin layer made of a biodegradable resin, wherein the biodegradable resin layer is formed by laminating a biodegradable resin in multiple layers. provide.
  • the transparent sheet is formed of a biodegradable resin, it can be made an environmentally friendly transparent sheet, and since the biodegradable resin is laminated and formed, sufficient strength is obtained. It can be a transparent sheet.
  • a biodegradable resin layer composed of a biodegradable resin, and one or both sides of the biodegradable resin layer.
  • a transparent sheet comprising a synthetic resin layer as a reinforcing material bonded to a surface.
  • the biodegradable resin is used for the transparent sheet, an environmentally friendly transparent sheet can be obtained, and since the synthetic resin layer is bonded to the biodegradable resin layer, the strength is sufficient. In the transparent sheet.
  • the synthetic resin layer provides a transparent sheet made of polyethylene terephthalate, polypropylene or polyethylene.

Landscapes

  • Laminated Bodies (AREA)

Abstract

Feuille transparente respectueuse de l'environnement, présentant une résistance mécanique suffisante et une excellente résistance à l'humidité, ainsi qu'un procédé pour fabriquer une boîte transparente, la feuille transparente comprenant une couche de Cellophane formée d'une Cellophane biodégradable et d'une couche de résine synthétique collée sur une ou les deux faces de la couche de Cellophane; l'opération de fabrication de la boîte transparente en utilisant la feuille transparente consiste à poinçonner la feuille transparente en suivant une forme de surface plane, former une ligne réglée pour pouvoir plier la feuille transparente et plier la feuille transparente le long de la ligne de pliage.
PCT/JP2002/003831 2001-04-23 2002-04-17 Feuille transparente et boite transparente utilisant cette feuille WO2002087875A1 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP2001124688 2001-04-23
JP2001-124688 2001-04-23
JP2001305324A JP3670605B2 (ja) 2001-10-01 2001-10-01 罫線入りシート及びこれを使用したケース
JP2001-305324 2001-10-01
JP2001327780A JP2003127303A (ja) 2001-10-25 2001-10-25 シート及びこれを使用した１個ケース
JP2001-327780 2001-10-25
JP2002092578A JP2003019771A (ja) 2001-04-23 2002-03-28 透明シート及びこれを用いた透明ケース
JP2002-92578 2002-03-28

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WO2002087875A1 true WO2002087875A1 (fr) 2002-11-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007008339A1 (fr) * 2005-07-12 2007-01-18 Engelhard Corporation Film multicouche

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6153276A (en) * 1996-11-22 2000-11-28 Dainippon Ink And Chemicals, Inc. Heat-sealable lactic acid-based polymer laminates
JP2001088256A (ja) * 1999-09-20 2001-04-03 Dainippon Printing Co Ltd 化粧シート

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6153276A (en) * 1996-11-22 2000-11-28 Dainippon Ink And Chemicals, Inc. Heat-sealable lactic acid-based polymer laminates
JP2001088256A (ja) * 1999-09-20 2001-04-03 Dainippon Printing Co Ltd 化粧シート

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007008339A1 (fr) * 2005-07-12 2007-01-18 Engelhard Corporation Film multicouche
JP2009501096A (ja) * 2005-07-12 2009-01-15 ビーエーエスエフ、カタリスツ、エルエルシー 多層フィルム

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