JPH052947U - Laminated sheet - Google Patents

Abstract

(57) [Summary] [Purpose] Even when sake or thin juice with a weak fragrance is added internally, the polyethylene odor does not transfer to and settle in the internal filler, and the taste and aroma of the internal filler A laminated sheet having a use as a packaging material that can be stored without changing the temperature. [Structure] Part of the ethylene glycol component is 1,4-
A laminated sheet 1 having a heat seal layer 2 made of a polyethylene glycol terephthalate resin substituted with cyclohexanedimethanol.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a laminated sheet used for various packaging materials.

[0002]

[Prior art]

  A package formed by a molded container or a sealed bag for storing beverages, foods, spices, etc. The sealing part is formed by the thermal bonding ability of the packaging material used for Normally, polyethylene resin is used so that the heat-bonding ability of polyethylene resin can be utilized. The laminated sheet provided with the heat-sealing layer according to 1. is used as a packaging material.

[0003]   The package made of the packaging material has a sealing portion formed by heat bonding of the heat seal layer. For packaging, which is formed and has a heat-sealing layer made of polyethylene resin. In the case of a package made of material, the inner surface layer of the molded container or closed bag is made of polyethylene resin. It is formed of a Toseal layer.

[0004]

[Problems to be solved by the device]

  However, the package made of this packaging material is a packaging material for molded containers and closed bags. Forming a polyethylene resin layer when obtaining a laminated sheet, and a package using the laminated sheet During molding of the polyethylene resin, the polyethylene resin undergoes thermal decomposition, resulting in the formation of volatile compounds such as aliphatic hydrocarbons. Generate minutes. For this reason, for example, sake or lightly aromatic juice, etc. When filled, the polyethylene odor is transferred to the inner filling and settles. It is a cause of changing the scent and the fragrance and reducing the product value.

[0005]   On the other hand, the present invention does not contain, for example, sake or thin aromatic juice in the package. Even if filled, there is no migration of polyethylene odor to the inside filling and fixation. A laminated sheet that is molded into a package that can be stored without changing the taste or aroma of the filling material. Provide the service.

[0006]

[Means for Solving the Problems]

  The first invention is that a part of the ethylene glycol component is added to the base material having a paper layer. Polyethyleneglycol in which is substituted with 1,4-cyclohexanedimethanol From a laminated sheet with a heat-sealing layer made of luterephthalate resin Become.

[0007]   In addition, the second invention of the present invention is such that the front and back surfaces of a base material having a paper layer are covered with ethylene glycol. A part of the recall component is replaced with 1,4-cyclohexanedimethanol. A heat seal layer made of polyethylene glycol terephthalate resin is formed It consists of laminated sheets.

[0008]   The base material in the laminated sheet of the present invention having the above-mentioned structure includes a paper layer and a gas barrier. Adhesive resin for adhering metal layers such as aluminum and laminated members in order to provide good properties Layers are used.

[0009]   Further, a part of the ethylene glycol component forming the layer on at least one side of the base material is 1, Polyethylene glycol tere substituted with 4-cyclohexanedimethanol The resin used to form the heat-sealing layer of phthalate-based resin is ordinary polyethylene. Such as propylene glycol terephthalate and polybutylene glycol terephthalate It is obtained by the same method as the synthesis method. That is, as a terephthalic acid component When a dimethyl ester compound is used, the dimethyl ester is formed by a transesterification reaction. Rephthalate in ethylene glycol and 1,4-cyclohexanedimethanol After reacting with glycol to obtain an intermediate, it is polycondensed under vacuum In addition, when terephthalic acid itself is used as the terephthalic acid component, Terephthalic acid was converted to ethylene glycol and 1,4-cyclohexene by the stellation reaction. After reacting with glycol with sandimethanol to give an intermediate, this is vacuumed. It can be easily obtained by polycondensation below. At this time, a catalyst is appropriately used Of course.

[0010]

[Action]

  In the laminated sheet of the present invention, the ethylen which forms a layer on at least one side of the laminated sheet. Part of the ren glycol component was replaced with 1,4-cyclohexanedimethanol The heat seal layer made of polyethylene glycol terephthalate resin is It acts to prevent the migration and fixation of polyethylene odor to the filling material inside the package. Of polyethylene glycol component in polyethylene glycol terephthalate Polyethylene in which 0 mol% is substituted with 1,4-cyclohexanedimethanol Lenglycol terephthalate resins are preferred, especially polyethylene glycol 30 mol% of the ethylene glycol component in luterephthalate is 1,4-sic Polyethylene glycol terephthalate substituted with rohexanedimethanol The use of gypsum resin prevents polyethylene odor from migrating into the filler and fixing Is most preferable as the heat-sealing layer. That is, polyethylene glycol Approximately 30 mol% of ethylene glycol in terephthalate is 1,4 -Polyethylene glycol terephthalate substituted with cyclohexanedimethanol Talate resin is an amorphous resin that has not been crystallized yet, When forming a heat-bonded part with a heat-sealing layer, it causes polyethylene odor. Capable of forming a thermal bond at a temperature that does not generate volatile components such as aliphatic hydrocarbons .

[0011]   Further, in the laminated sheet of the present invention, at least one layer of the laminated sheet is Some of the glycol components have been replaced with 1,4-cyclohexanedimethanol. Formed with a heat seal layer of polyethylene glycol terephthalate resin This heat seal layer is used for gas barrier, chemical resistance, hygiene and safety, and It has excellent properties such as adhesion to metal layers such as aluminum foil, and strength. For example, when compared with polyethylene glycol terephthalate resin, Even if it is present, it will be a resin layer with a low ethylene content. Therefore, the laminated sheet of the present invention is wrapped. In the packaging used as a wearing material, a part of this ethylene glycol component is 1,4- Polyethylene glycol terephthal substituted with cyclohexanedimethanol By using the heat seal layer made of rate resin as the inner surface layer, packaging For example, even if sake or thin aromatic juice is filled in the body, Excellent effect on quality preservation characteristics, with no transfer of scent of ren and fixing Play.

[0012]

【Example】

  Hereinafter, a specific structure of the laminated sheet of the present invention will be described with reference to examples.

[0013]   Example 1   A laminated sheet, which is an embodiment of the present invention and is indicated by reference numeral 1 in FIG. Part of the ethylene glycol component was replaced with 1,4-cyclohexanedimethanol Polyethylene glycol terephthalate resin [PETG 6763 (Eastma Heat seal layer 2 according to Nkodak Co .: trade name), aluminum layer 3, An adhesive resin layer 4 such as polyethylene or an ionomer resin, a paper layer 5, and a polyethylene It has a laminated structure with the lens layer 6.

[0014]   Example 2   In the structure of the laminated sheet 1 of Example 1, the polyethylene layer 6 was used instead of the polyethylene layer 6. Is formed of the same resin as the heat seal layer 2 in the laminated sheet 1, Part of the ethylene glycol component was replaced with 1,4-cyclohexanedimethanol Heat seal layer made of polyethylene glycol terephthalate resin / Aluminum layer / Adhesive resin layer such as polyethylene or ionomer resin / Paper layer / Part of the ethylene glycol component was replaced with 1,4-cyclohexanedimethanol For heat seal layer made of polyethylene glycol terephthalate resin A laminated sheet as another embodiment of the present invention having a laminated structure according to the above was obtained.

[0015]   In the laminated sheet having the structure of Example 2, the laminated sheet is used as a packaging material. The adhesive part between the front surface layer and the back surface layer of the packaging material when obtaining the package A part of the recall component is replaced with 1,4-cyclohexanedimethanol. Heat between heat seal layers made of polyethylene glycol terephthalate resin Since it becomes the adhesive part, the heat content of the polyethylene resin generated during the formation of the thermal adhesive part There is no problem of solution, completely preventing the migration and fixing of polyethylene odor to the inner filling in the package. You can stop.

[0016]

[Effect of device]

  In the laminated sheet of the present invention, the heat seal layer in the laminated sheet is ethylene glycol. A part of the recall component is replaced with 1,4-cyclohexanedimethanol. Since it is made of polyethylene glycol terephthalate resin, the laminated sheet When obtaining a package or using the laminated sheet as a packaging material, The heat-sealing layer of the product may undergo thermal decomposition to produce volatile components such as aliphatic hydrocarbons. There are few, and even if you put sake or thin aromatic juice in the package, There is no migration of polyethylene odor to these internal fillers and fixation. Since the packaging can be obtained without changing the taste or scent of the filling material, it has excellent storage characteristics. The package has excellent effects and is of high practical value.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an example of a laminated sheet of the present invention.

[Explanation of symbols]

1 ... Laminated sheet 2 ... Heat seal layer 3 made of polyethylene glycol terephthalate resin in which a part of the ethylene glycol component is replaced by 1,4-cyclohexanedimethanol 3. Aluminum layer 4 ... ..Adhesive resin layer 5 ... Paper layer 6 ... Polyethylene layer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B65D 81/24 E 7191-3E

Claims (2)

[Scope of utility model registration request] 1. A heat seal layer made of a polyethylene glycol terephthalate resin in which a part of the ethylene glycol component is replaced with 1,4-cyclohexanedimethanol is formed on a substrate having a paper layer. Characteristic laminated sheet. 2. A heat seal layer made of polyethylene glycol terephthalate resin in which a part of ethylene glycol component is replaced with 1,4-cyclohexanedimethanol is formed on both front and back surfaces of a base material having a paper layer. A laminated sheet characterized in that