JP2007168255A - Easy peel sealant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an extremely useful easy peel sealant having heat sealability, excellent in hermetical sealing properties and having easy opening properties. <P>SOLUTION: The easy peel sealant comprises a coextrusion laminated film composed of at least two layers, that is, a base material layer and a sealing layer and the base material layer is constituted of a resin layer comprising a resin composition based on medium density polyethylene, high density polyethylene or polypropylene. Further, the sealing layer is constituted of a resin layer comprising a resin composition based on a mixture wherein 50-90 pts.wt. of polypropylene with a melt flow rate (MFR) of 10-40 g/10 min and 10-50 pts.wt. of high density polyethylene are compounded. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an easy-peel sealant, and more particularly, an extremely useful easy-peel having heat sealability, excellent sealing properties and easy opening properties. It is about Lucyland.

2. Description of the Related Art Conventionally, plastic molded containers having various forms have been developed, and various articles such as foods and drinks and the like are filled therein. Thereafter, a lid is placed on the flange portion of the plastic molded container. Thus, the opening is hermetically sealed to produce packaged products having various forms. Therefore, as the above-mentioned cover material, usually, a base sheet and a heat seal film, or a laminate of a base sheet, a barrier base material and a heat seal film are used. It is composed of the body.
By the way, as the heat-sealable film constituting the above-described lid material, in particular, the heat-sealable film that seals the opening of the plastic-molded container with heat-seal is satisfied and at the time of consumption, the plastic molding is performed. It is required to have an easy opening property that can easily open the opening of the container.
Therefore, in recent years, heat seal films having various laminated structures have been developed and proposed for the heat seal films constituting the above-described lid material.
For example, one of them is a heat-sealable laminated film comprising at least two layers, and (a) the first layer serving as the seal layer is an ethylene / methacrylic acid copolymer, an ethylene / methyl methacrylate copolymer, At least one polymer (S ₁ ) selected from the group consisting of an ionomer, an ethylene / acrylic acid copolymer, an ethylene / ethyl acrylate copolymer and an ethylene / methyl acrylate copolymer, polyethylene, polypropylene and ethylene A layer containing a blend polymer with at least one polymer (S ₂ ) selected from the group consisting of propylene copolymers, the first layer having a thickness of 20 μm or less, and a cohesive failure strength of 50 to Within the range of 1,000 g / 15 mm width, (b) the second layer adjacent to the first layer is ethylene / methacrylic acid Polymer, ethylene / methyl methacrylate copolymer, ionomer, ethylene / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ethylene / ethyl acrylate copolymer, ethylene / methyl acrylate copolymer and their A layer containing at least one polymer selected from the group consisting of maleic acid graft polymers, wherein the cohesive failure strength of the second layer is at least 1.5 times the cohesive failure strength of the first layer; c) An easy-peeling coextruded laminated film characterized in that at least the first layer and the second layer are laminated by coextrusion has been proposed (see, for example, Patent Document 1).
In addition, an easy peel film for a polypropylene container is also proposed in which a sealing layer made of a composition containing polybutene, polyethylene and polypropylene is laminated on a base material layer made of polypropylene (for example, a patent) Reference 2).
JP-A-5-212835 JP-A-6-328639

Each of the easy peel films proposed above is a so-called cohesive failure type easy peel sealant in which the seal layer is opened after cohesive failure. It also has openability.
In addition, the easy peel films proposed above are all used for the seal layer to coagulate and break, and to suppress the so-called stringing phenomenon of the seal layer. The easy peel film is manufactured with a thin film thickness of about 5 to 10 μm.
However, since the easy peel film proposed above has a thin thickness of the cohesive failure seal layer, there are various cases when, for example, heat sealing is applied to the flange portion of a plastic molded container. This problem occurs.
For example, in the case where the flange portion of the plastic molded container is a flange portion having a projecting portion or the like, when the cover material is heat sealed with a ring seal, the seal constituting the cover material is formed. There is a problem that the layer is easily pierced and it is extremely difficult to obtain good sealing properties and easy opening properties.
In addition, when the seal area of the flange portion of the plastic molded container is small, even if the cover material is heat-sealed with a ring seal, the seal area is small and the sealing performance is not good. There is a problem that it is stable and it is extremely difficult to perform its function.
In fact, none of the easy peel films proposed above is yet fully satisfactory.
Accordingly, the present invention is to provide a very useful easy-peel sealant having heat sealability, excellent sealing properties and easy opening properties.

  As a result of various studies to improve the above-mentioned problems, the present inventor uses polyethylene and polypropylene having mutual solubility, paying attention to the coextrusion lamination processability, 50 to 90 parts by weight of the resin composition mainly composed of high density polyethylene or polypropylene, and polypropylene and high density polyethylene having a melt flow rate (MFR) in the range of 10 to 40 g / 10 min. On the other hand, a resin composition mainly composed of a mixture consisting of 10 to 50 parts by weight of the latter is used, and these are coextruded and laminated, so that at least two layers of a base material layer and a seal layer are co-extruded. Resin comprising a resin composition comprising an extruded laminated film and further comprising the base material layer as a main component of the medium density polyethylene, high density polyethylene or polypropylene. And the seal layer is made of polypropylene having a melt flow rate (MFR) in the range of 10 to 40 g / 10 min. The high-density polyethylene is composed of a resin layer composed of a resin composition mainly composed of a mixture composed of 10 to 50 parts by weight of the latter with respect to 50 to 90 parts by weight of the former, and has a film thickness of 15 to 40 μm. Thus, a coextruded laminated film of both resin layers is manufactured, and thus the coextruded laminated film of both resin layers is used as an easy peel sealant. -A base material sheet, a barrier base material, etc. are laminated on the surface of the base material layer constituting the runt to produce a cover material, and then the cover material is used and a plastic molding prepared separately. In the container, for example, food and drink, other items Then, the lid material is overlaid on the surface of the flange portion of the plastic molding container with the surface of the easy-peel sealant facing each other, and then the flange of the plastic molding container When the above lid material was heat-sealed on the surface of the part and sealed to produce a packaged product, the easy peel sealant constituting the above-mentioned lid material was heat-sealed. It has excellent properties and excellent sealing performance against the opening of a plastic molded container, and when used, it has very good easy-openability and is an extremely useful easy-peel sealant. The present invention has been found and completed.

  That is, the present invention comprises at least a two-layer coextrusion laminated film of a base material layer and a seal layer, and the base material layer is mainly composed of medium density polyethylene, high density polyethylene or polypropylene. The resin layer is composed of a resin composition, and the above-mentioned seal layer is made of polypropylene and high-density polyethylene having a melt flow rate (MFR) in the range of 10 to 40 g / 10 min. It is composed of a resin layer composed of a resin composition mainly composed of a mixture consisting of 10 to 50 parts by weight of the latter with respect to 90 parts by weight, and consists of a coextruded laminated film of both resin layers. It relates to a dipeel sealant.

Since the easy-peel sealant according to the present invention is constituted by using a relatively hard resin such as polypropylene or polyethylene having a medium density or higher as a material constituting the base material layer, The material layer can be configured to be hard and have a so-called waist, which has the advantage that the escape, flow, etc. of the resin can be suppressed during heat sealing.
In addition, the easy peel sealant according to the present invention is made of a polypropylene and a high material having a melt flow rate (MFR) in the range of 10 to 40 g / 10 min as a material constituting the seal layer. Since it uses a density polyethylene and is composed of a mixture thereof, it has the advantage that the function of cohesive failure is maintained, and the phenomenon such as stringing can be suppressed when peeling by cohesive failure. .
Furthermore, the easy peel sealant according to the present invention can be applied to a flange portion of a plastic molding container, for example, by increasing the thickness of the seal layer to 15 μm to 40 μm or the like. For example, even when the flange portion of the plastic molding container is a seal portion having a protruding portion or the like, the lid material is heat sealed with a ring seal. Even if the seal layer is not broken through, it is possible to obtain favorable sealing properties and easy opening properties.
Even if the seal area of the flange part of the plastic molded container is small, even if the cover material is heat sealed with a ring seal, the sealing performance is not unstable, and it is extremely well sealed. It has a sex.
Furthermore, in the present invention, as a material constituting the base material layer and the seal layer, by using a resin having compatibility with each other such as polyethylene or polypropylene, the coextrusion lamination processability is excellent. Therefore, a two-layer coextruded laminated film can be produced very well.
That is, the easy-peel sealant according to the present invention is excellent in heat-sealability as a heat-seal material, and can sufficiently satisfy its sealing property. In addition to satisfying the requirements of quality protection, extension of storage period, etc., it also has excellent easy peelability and has an easy-opening property that allows easy opening of packaging bags when consumed. Furthermore, it is possible to form a very beautiful peeling interface in which no phenomenon such as stringing is observed at the peeling interface, and it can be applied to various plastic molding container lids and the like.

Hereinafter, the present invention will be described in more detail with reference to the drawings.
First, FIG. 1 is a schematic cross-sectional view showing an example of the layer structure of an easy-peel sealant according to the present invention, and FIGS. 2 and 3 are diagrams showing an example according to the present invention shown in FIG. FIG. 4 is a schematic cross-sectional view showing one example of the layer structure of a lid material according to the present invention manufactured using a di-peel sealant, and FIG. 4 is a lid according to the present invention shown in FIG. It is a schematic perspective view which shows the outline of the structure about the packaging product which concerns on this invention manufactured using the material and sealing the plastic molding container.

  First, in the present invention, the easy-peel sealant according to the present invention will be described. The easy-peel sealant A according to the present invention includes, for example, at least a group as shown in FIG. It consists of a two-layer coextruded laminated film 3 of a material layer 1 and a seal layer 2, and further, the base material layer 1 is made of a resin composition mainly composed of medium density polyethylene, high density polyethylene or polypropylene. The seal layer 2 is composed of a resin layer 1a, and the above-described seal layer 2 is made of polypropylene and high-density polyethylene having a melt flow rate (MFR) within a range of 10 to 40 g / 10 min. The basic structure consists of a resin layer 2a made of a resin composition mainly composed of a mixture consisting of 10 to 50 parts by weight of the latter with respect to parts by weight, and a coextruded laminated film 3a of both resin layers. Do Than is.

The above illustrations are examples of the layer structure of the easy-peel sealant according to the present invention, and it goes without saying that the present invention is not limited thereto. .
In addition, in the easy peel sealant according to the present invention, in addition to the base material layer and the seal layer, for example, in order to strengthen the tight adhesion of both layers, other It is also possible to use a resin composition and have a laminated structure of three layers or more.

  Next, in the present invention, the lid material according to the present invention manufactured by using the above-described easy-peel sealant according to the present invention will be described. As described above, when using the easy peel sealant A according to the present invention shown in FIG. 1, first, on the back surface of the desired substrate sheet 11 made of corona treatment, etc. For example, the present invention shown in FIG. 1 is formed on the surface of the base material sheet 11 including the printed pattern layer 12 after forming the printed pattern layer 12 composed of desired characters, symbols, patterns, figures, etc. The easy-peel sealant A according to the present invention is laminated with the surfaces of the one base material layer (1, 1a) constituting the same facing each other. -The cover material B based on this invention manufactured using Lucyland A can be manufactured.

Further, in the present invention, another example of the lid material manufactured using the above-described easy-peel sealant according to the present invention is illustrated as shown in FIG. For example, after a printed pattern layer 12 made of desired characters, symbols, designs, figures, etc. is formed on the back surface of the substrate sheet 11 made of corona treatment, the substrate sheet containing the printed pattern layer 12 is formed. -The barrier substrate 13 is laminated and laminated on the surface of the substrate 11, and the easy peel sealant according to the present invention shown in Fig. 1 is further formed on the surface of the barrier substrate 13. According to the present invention, A is manufactured by using the easy-peel sealant A according to the present invention by laminating and laminating A so that the surfaces of one base material layer 1 constituting the same are opposed to each other. The lid material B ₁ can be manufactured.
In FIG. 2, the meanings of reference numerals 1, 2, 3, 1a, 2a, 3a, A, etc. represent the same meanings as those in FIG.
The above examples illustrate one or two examples of the lid material according to the present invention manufactured using the easy-peel sealant according to the present invention, and the present invention is not limited thereto. It is not something.

For example, although not shown, the lid according to the present invention may be formed by arbitrarily laminating other base materials between the layers depending on, for example, the contents to be filled and packaged, the purpose of the packaging, the packaging form, etc. The lid material according to the present invention having various forms can be manufactured.
In the above, the laminating method for laminating at least the base sheet, the barrier base material, the easy-peel sealant according to the present invention is, for example, an adhesive for laminating, etc. A laminating adhesive layer, and then laminating via the laminating adhesive layer, a dry laminating lamination method, or an adhesion assistant layer by an anchor coating agent, a melt-extruded resin layer, etc. Etc., and then, a melt extrusion laminating method in which the layers are laminated through an adhesion assistant layer, a melt extruded resin layer, or the like using the anchor coating agent or the like.

Next, in the present invention, an example of the packaged product according to the present invention, which is manufactured by using the lid material according to the present invention as described above and sealing a plastic molded container, for example, will be described. As a packaged product according to the invention, for example, a case where the lid product B according to the present invention shown in FIG. 2 is used is described as an example. As shown in FIG. Using a resin, for example, a plastic molding container 21 having a desired shape is manufactured by an ordinary molding method such as an injection molding method, thermoforming such as vacuum / pressure forming, blow molding, and the like, The plastic molded container 21 is filled with, for example, an article 22 such as food or drink, and then the lid B shown in FIG. 2 is applied to the surface of the flange portion 23 of the plastic molded container 21. That 2 and the surface of the flange layer 23 of the plastic molding container 21 is heat sealed with the cover material B shown in FIG. The packaged product C according to the present invention manufactured by using the lid material B according to the present invention can be manufactured by sealing the opening of the plastic molded container 21 of the present invention.
The above illustration is an example of the packaged product according to the present invention, and the present invention is not limited thereto. For example, the form of the plastic molded container is not shown, It can take any form according to the article to be filled and packaged, such as a conical shape, a pyramid shape, a cylindrical shape, a prism shape such as a triangle, a square, and the like, a spherical shape, and the like.
Of course, the package product according to the present invention can be manufactured in the same manner as described above by using the lid according to the present invention shown in FIG.

Next, in the present invention, the materials constituting the easy-peel sealant, the cover material, the plastic molded container, the packaged product and the like according to the present invention as described above, the manufacturing method thereof, etc. will be described. In the present invention, the easy-peel sealant according to the present invention will be described. First, as a resin for forming the base material layer constituting the easy-peel sealant according to the present invention, comparison is made. It is preferable to use a resin which is hard and is melted by heat and has compatibility with the resin constituting the seal layer described later and which is excellent in coextrusion moldability. Specifically, medium density polyethylene, high density polyethylene, polypropylene and the like can be used.
Thus, as the medium density polyethylene, for example, the density is about 0.930 to 0.941 g / cm ³ , and the melt flow rate (MFR) is 0.1 to 15.0 g / 10 min. Medium density polyethylene that is within the range can be used.
Thus, as the above medium density polyethylene, the monomer is ethylene, and further propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene. , 1-nonene, 1-decene, and other α-olefins, for example, high pressure method, slurry method, solution method, gas phase method, and other polymerization methods, ethylene alone, or An ethylene homopolymer obtained by copolymerizing ethylene and another olefin, a copolymer of ethylene and another olefin, or the like can be used.
In the present invention, the melt flow rate (MFR) is measured from a method based on JIS K6921, and the density is measured from a method based on JIS K7112.
The same applies hereinafter.

In the present invention, the high-density polyethylene has a density of about 0.942 g / cm ³ or more, and a melt flow rate (MFR) of about 0.5 to 12.0 g / 10 quantile. High density polyethylene in the range can be used.
Thus, as the above high-density polyethylene, ethylene as a monomer, further propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene. Α-olefin such as 1-nonene, 1-decene, etc., for example, by using a polymerization method such as slurry method, solution method, gas phase method, etc., ethylene alone or other than ethylene It is possible to use an ethylene homopolymer obtained by copolymerization of an olefin and a copolymer of ethylene and another olefin.

Next, in the present invention, as the polypropylene, for example, the density is about 0.900 g / cm ³ , and the melt flow rate (MFR) is about 0.5 to 8.0 g / 10 min. It is possible to use polypropylene that is within range.
Specifically, as the polypropylene, it is preferable to use a polypropylene resin such as a homopolymer of propylene or a copolymer (copolymer) of propylene and an α-olefin such as ethylene.
In addition, as said polypropylene resin, the block copolymer (copolymer) or the random copolymer (copolymer) is used especially, Furthermore, the random copolymer (copolymer) is used. Is preferable.
Therefore, in the present invention, as the polypropylene, it is preferable to use a polypropylene resin having excellent melt tension and stretchability, etc., and having an extrusion moldability described later, specifically, in the main chain of the polypropylene resin. It is preferable to use those in which long chain branching is introduced to increase the tension in the molten state.
In the present invention, specifically, as a polypropylene resin excellent in melt tension and stretchability, a polypropylene resin composed of a block or random copolymer of propylene and ethylene or propylene and 1-octene is used. Is preferred.
Thus, in the polypropylene resin composed of a block or random copolymer of propylene and ethylene or propylene and 1-octene, the density is about 0.9 [g / cm ³ ]. The rate (MFR) is in the range of 0.1 to 10.0 [g / 10 min], and the melt tension is in the range of 100 [mN] or more (10 [cN] or more). Can be used.
Further, in the above, when the melt flow rate (MFR) is less than 0.1 [g / 10 minutes], the resin pressure increases during resin extrusion, giving a large load to the film forming machine, etc. In addition, those exceeding 10.0 [g / 10 min] are not suitable for the top blowing inflation film forming method and are not preferred because they do not blow upward. Furthermore, in the above, when the melt tension is less than 100 [mN] (less than 10 [cN]), it is not preferable because it is not suitable for the top blowing inflation film forming method.

Next, in the present invention, as the resin forming the seal layer constituting the easy-peel sealant according to the present invention, for example, the melt flow rate (MFR) is 10 to 40 g / 10. It is possible to use a mixed resin having a blending ratio of 10 to 50 parts by weight of the latter with respect to 50 to 90 parts by weight of the former and polypropylene and high density polyethylene having a minute range.
As the polypropylene having the melt flow rate (MFR) in the range of 10 to 40 g / 10 min, as in the polypropylene constituting the base material layer, a homopolymer of propylene, or propylene and ethylene, etc. It is preferable to use a polypropylene resin such as a copolymer (copolymer) with an α-olefin.
In addition, as said polypropylene resin, the block copolymer (copolymer) or the random copolymer (copolymer) is used especially, Furthermore, the random copolymer (copolymer) is used. Is preferable.
Therefore, in the present invention, as the polypropylene, it is preferable to use a polypropylene resin having excellent melt tension and stretchability, etc., and having an extrusion moldability described later, specifically, in the main chain of the polypropylene resin. It is preferable to use those in which long chain branching is introduced to increase the tension in the molten state.
In the present invention, specifically, as a polypropylene resin excellent in melt tension and stretchability, a polypropylene resin composed of a block or random copolymer of propylene and ethylene or propylene and 1-octene is used. Is preferred.

Thus, in the above polypropylene-based resin, the density is about 0.9 [g / cm ³ ], the melt flow rate (MFR) is about 10 to 40 g / 10th, preferably, As the melt tension in the range of 15 to 25 g / 10 quantile, the melt tension in the range of 100 [mN] or more (10 [cN] or more) can be used.
Further, in the above, when the melt flow rate (MFR) is less than 10 g / 10 minutes, the resin pressure rises during resin extrusion, and a large load is applied to the film forming machine. -Unfavorable because the cohesive failure of the seal layer as a peel sealant is not smooth, and those exceeding 40 g / 10 min are suitable for the top blown inflation film forming method. Therefore, it is not preferable because it does not blow upward.
Furthermore, in the above, when the melt tension is less than 100 [mN] (less than 10 [cN]), it is not preferable because it is not suitable for the top blowing inflation film forming method.

Next, in the present invention, as the high-density polyethylene forming the seal layer constituting the easy-peel sealant according to the present invention, the high-density polyethylene constituting the base material layer is the same. Can be used for
That is, in the present invention, as the above high-density polyethylene, for example, the density is about 0.942 g / cm ³ or more, and the melt flow rate (MFR) is about 0.1 to 10.0 g / 10 quantile. High density polyethylene in the range can be used.
Thus, as the above high-density polyethylene, ethylene as a monomer, further propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene. Α-olefin such as 1-nonene, 1-decene, etc., for example, by using a polymerization method such as slurry method, solution method, gas phase method, etc., ethylene alone or other than ethylene It is possible to use an ethylene homopolymer obtained by copolymerization of an olefin and a copolymer of ethylene and another olefin.
In the present invention, when high density polyethylene is used, there is an advantage that the strength of the seal layer can be improved.

Next, in the present invention, the melt flow rate (MFR) ranges from 10 to 40 g / 10 min as a resin for forming the seal layer constituting the easy peel sealant according to the present invention. The blending ratio of the polypropylene and the high-density polyethylene is from 10 to 50 parts by weight of the latter with respect to the former 50 to 90 parts by weight, preferably 20 to 40 parts by weight of the latter with respect to 60 to 80 parts by weight of the former. A mixed resin obtained by mixing at a blending ratio of
In the above, when the amount of polypropylene is less than 50 parts by weight, sealing (thermal bonding) with the polypropylene molded container is not performed smoothly, and the strength, hermeticity, and the like are deteriorated. In this case, it is not preferable because a phenomenon such as stringing frequently occurs, and when it exceeds 90 parts by weight, it is sealed (thermally bonded) to the polypropylene molded container more than necessary, and the seal strength is excessively increased. In the case where the seal does not become a peel, and the seal is flat, it is not preferable because the easy peel property is deteriorated.
In addition, in the above, if the high-density polyethylene is less than 10 parts by weight, it is sealed (thermally bonded) more than necessary with the polypropylene molded container, and the seal strength is excessively increased and the easy peel. In addition, in the case of a seal in a face-to-face manner, it is not preferable because the ease-peel property is deteriorated. It is not preferable because it is not carried out smoothly, and the strength, sealing performance, and the like are deteriorated, and in the case of a face-to-face seal, a phenomenon such as string drawing frequently occurs.

  Next, in the present invention, the resin composition constituting the easy-peel sealant according to the present invention will be described in more detail. First, in the present invention, the easy-peel seal according to the present invention is described. As the resin composition for forming the base material layer constituting the runt, for example, the above medium density polyethylene, high density polyethylene or polypropylene is the main component of the vehicle, and if necessary, when forming the film , For example, film processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipperiness, release properties, flame retardancy, antifungal properties, electrical properties, strength, etc. For the purpose of improvement and modification, one or more kinds of various plastic compounding agents and additives are arbitrarily added, and if necessary, a solvent, a diluent and the like are added and kneaded sufficiently. Easy peel according to the present invention - it is possible to prepare a resin composition for forming the base layer constituting the plant.

  Next, as the resin composition forming the seal layer constituting the easy peel sealant according to the present invention, for example, the melt flow rate (MFR) is 10 to 40 g / 10 min. A mixed resin consisting of a blending ratio of polypropylene and high density polyethylene in the range of 10 to 50 parts by weight of the latter to 50 to 90 parts by weight of the former is used as the main component of the vehicle. Upon film formation, for example, film processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipperiness, mold release properties, flame retardancy, antifungal properties, electrical properties, strength For the purpose of improving and modifying others, etc., one or more kinds of various plastic compounding agents and additives are arbitrarily added, and if necessary, a solvent, a diluent, etc. are sufficiently added. The easy-peel-shear run according to the present invention Forming the sheet - it is possible to prepare a resin composition for forming the Le layer.

  In the present invention, in each of the resin compositions constituting the above-described easy-peel sealant according to the present invention, examples of the plastic compounding agent and additive include, for example, a lubricant, a crosslinking agent, an oxidizing agent. Inhibitors, UV absorbers, light stabilizers, fillers, reinforcing agents, antistatic agents, flame retardants, flame retardants, foaming agents, antifungal agents, pigments, dyes, dispersants, surfactants, antiblocking agents, etc. In addition, a modifying resin or the like can also be used, and the addition amount is arbitrarily added from a very small amount to several tens weight% depending on the purpose. can do.

Furthermore, in the above, as the compounding agent or additive, specifically, a lubricant having its own lubricity and little migration in the resin can be used. For example, liquid paraffin, white Vaseline, petroleum wax, microcrystalline wax, montan wax, polyethylene wax and the like, higher fatty acids having 8 to 22 carbon atoms, or higher fatty acid aluminum, higher fatty acid calcium, higher fatty acid magnesium higher fatty acid zinc, higher fatty acid lithium Higher fatty acids or metal salts thereof, linear aliphatic monohydric alcohols having 8 to 18 carbon atoms, glycerin, sorbitol, propylene glycol, pentaerythritol, triethylene glycol, etc. Aliphatic alcohols, higher fatty acids having 4 to 22 carbon atoms and straight chain aliphatics having 8 to 18 carbon atoms Esters with polyhydric alcohols, butyl acetyl citrate, di-2-ethyl-hexyl adipate, azelaic acid-n-hexyl, ethanediol montanate, poly (1.3-butanediol adipate) ester, acetylricino Methyl ester, poly (1.3-butylene glycol, 1.4-butylene glycol, octyl alcohol adipate) ester, ester of sugar sugar and fatty acid ester, hydrogenation Edible oils and fats, castor oil, spam acetyl wax, glycerides of acetylated monoglyceride sugar, ethylene bis-fatty acid amide represented by, for example, ethylene bisoleyl amide having 16 to 18 carbon atoms, higher fatty acid amide having 8 to 22 carbon atoms , Stearyl erucamide, erucic acid amide, oleyl palmitoamide, etc. 1 to 2 types of fatty acid amides, and other types such as methylhydrodiene polysiloxane, dimethyl polysiloxane, methylphenyl polysiloxane, silicone oil jarodine such as polyoxyalkylene dimethylpolysiloxane, and glycerin ester of maleic acid modified rosin The above can be used.
In the present invention, among the lubricants as described above, in particular, erucic acid amide, ethylene bis oleyl amide, stearic acid amide, oleic acid amide, methylene bis stearic acid amide, etc. themselves have lubricity, It is a very effective material.
As the addition amount of the above-mentioned lubricant, it is preferable to add at a ratio of about 0.08 wt% to 10.0 wt% with respect to the resin component.

In the present invention, other oxides such as aluminum oxide, magnesium oxide, silica, calcium oxide, titanium oxide, and zinc oxide; hydroxides such as aluminum hydroxide, magnesium hydroxide, and calcium hydroxide; Carbonates such as magnesium and calcium carbonate, sulfates such as calcium sulfate and barium sulfate, silicates such as magnesium silicate, aluminum silicate, calcium silicate and aluminosilicate, and others, kaolin, talc, diatomaceous earth, etc. Anti-blocking agent based on inorganic compounds, or high-density polyethylene, ultra-high molecular weight polyethylene having a molecular weight of 300000 or more, polypropylene, polycarbonate, polyamide, polyester, melamine resin, diallyl phthalate resin, acrylic resin, etc. Organic consisting of fine powder It one free of compounds based antiblocking agents can be added two or more.
The addition amount is preferably about 0.01 to 3% by weight with respect to the resin component.

  Next, in the present invention, a method for producing an easy-peel sealant according to the present invention using each of the resin compositions as described above will be described. Each resin composition is prepared as described above, and then the resin composition is used, and then the resin composition is co-examined using, for example, a T-die co-extruder or an inflation co-extruder. The easy-peel sealant according to the present invention can be produced by extrusion.

  Thus, in the present invention, a specific method for producing an easy-peel sealant according to the present invention using each resin composition as described above will be described. In the present invention, first, As described above, the resin composition forming the base material layer constituting the easy-peel sealant according to the present invention, and the seal constituting the easy-peel sealant according to the present invention. And then using the two resin compositions, which are co-extruded using, for example, a T-die co-extruder, an inflation co-extruder, etc. Molded and composed of at least a two-layer coextruded laminated film of a base material layer and a seal layer, and further, the base material layer is composed of a medium density polyethylene, high density polyethylene or polypropylene as a main component It is composed of a resin layer made of The layer is composed of polypropylene and high-density polyethylene having a melt flow rate (MFR) in the range of 10 to 40 g / 10 min, and a blend ratio of 10 to 50 parts by weight of the latter with respect to 50 to 90 parts by weight of the former. An easy-peel sealant composed of a resin layer composed of a resin composition containing a mixture as a main component and comprising a coextruded laminated film of both resin layers can be produced.

The above illustration is an example of the method for producing an easy-peel sealant according to the present invention, and the present invention is not limited to this.
In the present invention, as the easy-peel sealant according to the present invention, other materials are used depending on the purpose of use, application, etc., and these are optionally coextruded and laminated. A coextruded multilayer laminated resin film having a shape can be designed and manufactured.

Next, in the present invention, the film thickness of the easy-peel sealant according to the present invention is about 25 μm to 90 μm, preferably about 40 μm to 70 μm.
Thus, in the easy-peel sealant according to the present invention, as the film thickness of each layer constituting the easy-peel sealant, first, as the base material layer, the film thickness is 10 μm. It is preferable that the seal layer has a thickness of about 15 μm to 40 μm, preferably about 20 μm to 30 μm.
In the above, as the film thickness of each layer constituting the easy-peel sealant according to the present invention, first, the film thickness of the base material layer is less than 10 μm from the viewpoint of film formation stability. If the film thickness exceeds 50 μm, the film formation stability is obtained, but it is not preferable for reasons such as material cost, weight reduction, and environmental problems (over spec).
Next, when the thickness of the seal layer is less than 15 μm, the peeling interface is beautiful, but the seal to the container having the wire seal projection flange becomes unstable. It is not preferable for the reason, and when the film thickness exceeds 40 μm, the seal to the container having the wire seal and the protruding flange is stabilized, but it is not preferable for the reason that the peeling interface disappears.

  Thus, in the present invention, the base material layer constituting the above-described easy-peel sealant according to the present invention has the above-described configuration, and the strength, tear resistance, so-called waist, as a lid material. In addition, the seal layer constituting the easy peel sealant according to the present invention has a seal strength ( It has effects such as peel strength), peel state (beauty of the peel interface), and convenience.

As is apparent from the above description, the easy-peel sealant according to the present invention has a performance as a heat-sealable resin layer that is excellent in hermeticity and easy to open. It acts as a heat-sealable material constituting the packaging material.
Thus, the easy peel sealant according to the present invention blocks the permeation of this and other base sheet such as plastic film, paper base, other oxygen gas or water vapor. A laminate material having various forms is manufactured by arbitrarily laminating one or more of various substrate films such as a barrier substrate, cellophane, woven or non-woven fabric, glass plate, etc. The laminated material can be made into a bag and applied to uses such as a packaging material constituting a packaging bag having various forms, a packaging material constituting a lid, and the like.
In particular, the easy-peel sealant according to the present invention is excellent in heat sealability as a heat seal material and can sufficiently satisfy its sealing property. In addition to satisfying the requirements of quality protection, extension of storage period, etc., it also has excellent easy peelability and has an easy-opening property that allows easy opening of packaging bags when consumed. Furthermore, it is possible to form a very beautiful peeling interface in which no phenomenon such as stringing is observed at the peeling interface, and it can be applied to various plastic molding container lids and the like.

Next, in the present invention, the laminate material according to the present invention as a packaging material using the above-described easy-peel sealant according to the present invention will be described in more detail. As a method, for example, a dry laminate laminating method in which a desired base material such as a plastic film is arbitrarily laminated via a primer layer or a laminating adhesive layer, or a primer layer or Various types of laminates such as an extrusion laminating method in which various resins are melt-extruded through an anchor coating agent layer and the desired base material is arbitrarily laminated, and other laminating methods are used. Laminates can be manufactured.
Thus, in the present invention, the laminated material as described above is used as, for example, a packaging material for producing a packaging bag, a packaging material for producing a lid material, or the like.

Thus, in the present invention, the base material sheet constituting the laminated material according to the present invention will be described. As the base material sheet, this constitutes a packaging bag or a lid material. Since it becomes a basic or auxiliary material, it has excellent properties in mechanical, physical, chemical, etc., excellent in strength, toughness, etc., and further, heat resistance, moisture resistance, pinhole resistance, A resin film or sheet excellent in puncture resistance, transparency, etc. can be used.
Specifically, for example, polyester resins, polyamide resins, polyaramid resins, polyethylene resins, polypropylene resins, polycarbonate resins, polyacetal resins, fluorine resins, and the like. Resin films or sheets can be used.
Thus, as the resin film or sheet, any of an unstretched film or a stretched film stretched in a uniaxial direction or a biaxial direction can be used.
In the present invention, the thickness of the resin film or sheet may be a thickness that can be kept to the minimum necessary for strength, puncture resistance, rigidity, and the like. On the other hand, if it is too thin, the strength, puncture resistance, rigidity, etc. are lowered, which is not preferable.
In the present invention, for the reasons described above, about 10 μm to 100 μm, preferably about 12 μm to 50 μm is most desirable.
Thus, in the present invention, among the above-described resin films or sheets, in particular, a biaxially stretched polyester resin having a thickness of about 9 to 30 μm, a biaxially stretched polyamide resin, or a biaxial It is preferable to use a stretched polypropylene resin film.

Further, in the present invention, as the base material sheet laminated with the easy-peel sealant according to the present invention, in addition to the resin film or sheet as described above, for example, moldability For example, a paper substrate such as a highly sized bleached or unbleached paper substrate, or pure white roll paper, kraft paper, paperboard, processed paper, etc. Can be laminated.
In the above, as the paper substrate constituting the paper layer, it is desirable to use a material having a basis weight of about 80 to 600 g / m ² , preferably a basis weight of about 100 to 450 g / m ² .
Of course, in the present invention, the paper base material constituting the paper layer and various resin films or sheets as the base film mentioned above can be used in combination.

Next, in the present invention, as another base material sheet laminated with the above-described easy peel sealant according to the present invention, for example, the property of shielding light such as sunlight, or A material having the property of not allowing permeation of gas such as water vapor, water, oxygen, and the like can be used. This may be a single base material or a composite base material formed by combining two or more base materials. Etc.
Specifically, for example, a resin film having a deposited film of an inorganic oxide such as silicon oxide or aluminum oxide having a barrier property, low density polyethylene having a barrier property such as water vapor or water, medium density polyethylene, high Films or sheets of resin such as density polyethylene, linear low density polyethylene, polypropylene, ethylene-propylene copolymer, etc., polyvinyl alcohol having gas barrier properties, saponified ethylene-vinyl acetate copolymer, nylon MXD6 Films or sheets of resins such as pigments, and various colored resin films or sheets having light-shielding properties obtained by adding a colorant such as a pigment to the resin and kneading into a film by adding desired additives. Can be used.
These materials can be used alone or in combination. The thickness of the film or sheet is arbitrary, but is usually about 5 μm to 300 μm, more preferably about 10 μm to 100 μm.

Further, in the above, a vapor deposition film of inorganic oxide having a thickness of about 100 mm to 2000 mm can be used.
Examples of the resin film that supports the vapor-deposited film include polyester film, polyamide film, polyolefin film, polyvinyl chloride film, polycarbonate film, polyvinylidene chloride film, polyvinyl alcohol film, and ethylene-acetic acid. A vinyl copolymer saponified film, etc. can be used.

In the above, as the inorganic oxide constituting the vapor-deposited film layer of the inorganic oxide, for example, silicon oxide (SiO _x ), aluminum oxide, indium oxide, tin oxide, zirconium oxide or the like may be used. it can.
Furthermore, in the present invention, the inorganic oxide may be a mixture of silicon monoxide and silicon dioxide, or a mixture of silicon oxide and aluminum oxide.
Thus, in the present invention, the inorganic oxide thin film layer is formed by forming a deposited film by a vacuum deposition method such as an ion beam method or an electron beam method, a sputtering method, or the like. be able to.
In the above, the thickness of the inorganic oxide thin film layer is usually preferably about 100 to 2000 mm in order to obtain a sufficient barrier property, and particularly preferably about 200 to 1500 mm in the present invention. .
In the above, when the thickness of the inorganic oxide thin film layer exceeds 1500 mm, particularly when it exceeds 2000 mm, the inorganic oxide thin film layer is liable to crack and the like, thereby reducing the barrier property. It is not preferable because of the problem that the material cost is high and the material cost is high, and if it is less than 100 mm, particularly less than 200 mm, it is difficult to recognize the effect, which is not preferable.

Next, in the present invention, as the other base material sheet laminated on the easy-peel sealant according to the present invention, there is little adsorption of a fragrance component contained in the contents to be filled and packaged. It is possible to use a resin film or sheet having a high aroma retaining property and a property that does not cause a taste change or a strange odor.
Specifically, for example, polyacrylic resin, polymethacrylic resin, polyacrylonitrile resin, polymethacrylonitrile resin, polystyrene resin, polycarbonate resin, polyethylene terephthalate resin or the like Resin obtained by copolymerizing or modifying a part of ethylene component and / or terephthalate component with other di- or higher polyhydric alcohol component or dicarboxylic acid component, or polyester such as polyethylene naphthalate resin Use films or sheets of resins such as resins, polyamide resins, saponified ethylene-vinyl acetate copolymers, polyvinyl alcohol resins, polyvinyl chloride resins, polyvinylidene chloride resins, etc. Can do.
Therefore, in the present invention, among the above-described resin films or sheets, it is desirable to use a resin film or sheet having a fragrance retaining property and a barrier property against oxygen gas or water vapor. Specifically, for example, a saponified ethylene-vinyl acetate copolymer, a polyamide-based resin, a polyacrylonitrile-based resin, a polyester-based resin, or the like is used as a resin film or a film having excellent aroma retention and barrier properties. -It is desirable to use

Furthermore, in the present invention, since packaging containers, lids, etc. are usually subjected to severe physical and chemical conditions, the packaging materials constituting the packaging containers have severe packaging suitability. And various conditions such as anti-deformation strength, drop impact strength, pinhole resistance, heat resistance, sealability, quality maintenance, workability, hygiene, etc. are required. In, a material that satisfies the various conditions as described above can be arbitrarily selected and used.
Specifically, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid Ethyl copolymer, ethylene-acrylic acid or methacrylic acid copolymer, methylpentene polymer, polybutene resin, polyvinyl chloride resin, polyvinyl acetate resin, polyvinylidene chloride resin, vinyl chloride-vinylidene chloride copolymer Polymer, poly (meth) acrylic resin, polyacrylonitrile resin, polystyrene resin, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), polyester resin, Polyamide resin, polycarbonate Known resins such as neat resins, polyvinyl alcohol resins, saponified ethylene-vinyl acetate copolymers, fluorine resins, diene resins, polyacetal resins, polyurethane resins, nitrocellulose, etc. Any resin film or sheet can be selected and used.
In addition, for example, a film such as cellophane, synthetic paper, and the like can be used.
In the present invention, the above-described film or sheet may be any of unstretched, uniaxially or biaxially stretched.
The thickness is arbitrary, but can be selected from a range of several μm to 300 μm.
Furthermore, in the present invention, the film or sheet may be a film having any property such as extrusion film formation, inflation film formation, and coating film.

In the present invention, in the laminated material according to the present invention, an arbitrary printed pattern layer can be provided on the front surface, the back surface, or both surfaces of any material constituting the laminated material.
Thus, in the present invention, as the printed pattern layer, for example, a desired printed pattern made of, for example, characters, figures, symbols, patterns, etc. is printed on the substrate film, A printed pattern layer can be formed.
Thus, as the above-mentioned printed pattern layer, specifically, first, an ink vehicle composed of one or more kinds of resin or the like is a main component, and if necessary, a plasticizer and a stabilizer. , One or more additives such as antioxidants, light stabilizers, ultraviolet absorbers, curing agents, cross-linking agents, lubricants, antistatic agents, fillers, etc. are optionally added, and further dyes, A colorant such as a pigment is added, and the ink composition is prepared by sufficiently kneading with a solvent, a diluent, etc., and then the ink composition is used, for example, gravure printing, offset printing, letterpress printing, screen printing A desired printing pattern consisting of characters, figures, symbols, patterns, etc. is printed on the base film using a printing method such as printing, transfer printing, flexographic printing, etc. The printed pattern layer can be formed

  In the above, as the vehicle for ink, known ones such as sesame oil, drill oil, soybean oil, hydrocarbon oil, rosin, rosin ester, rosin modified resin, shellac, alkyd resin, phenol resin, malein Acid resins, natural resins, hydrocarbon resins, polyvinyl chloride resins, polyvinyl acetate resins, polystyrene resins, polyvinyl butyral resins, acrylic or methacrylic resins, polyamide resins, polyester resins, polyurethane resins Use one or more of epoxy resin, urea resin, melamine resin, amino alkyd resin, phenol resin, nitrocellulose, ethylcellulose, chlorinated rubber, cyclized rubber, etc. Can do.

Next, in the present invention, the laminating adhesive layer constituting the laminated material according to the present invention will be described. As the laminating adhesive constituting the laminating adhesive layer, for example, poly A vinyl acetate adhesive, a homopolymer such as ethyl acrylate, butyl, 2-ethylhexyl ester, or a polyacrylate adhesive composed of a copolymer of these with methyl methacrylate, acrylonitrile, styrene, etc., Cyanoacrylate adhesives, ethylene copolymer adhesives made of copolymers of ethylene and vinyl acetate, ethyl acrylate, acrylic acid, methacrylic acid, etc., cellulose adhesives, polyester adhesives Agent, polyamide adhesive, polyimide adhesive, amino resin adhesive made of urea resin or melamine resin, etc. Phenolic resin adhesive, epoxy adhesive, polyurethane adhesive, reactive (meth) acrylic adhesive, chloroprene rubber, nitrile rubber, styrene-butadiene rubber rubber adhesive, silicone It is possible to use an adhesive such as an adhesive, an alkali metal silicate, an inorganic adhesive made of low melting point glass, or the like.
The composition system of the above-mentioned adhesive may be any composition form such as an aqueous type, a solution type, an emulsion type, and a dispersion type, and the properties thereof are film / sheet type, powder type, solid type, etc. Any form may be used, and the adhesion mechanism may be any form such as a chemical reaction type, a solvent volatilization type, a heat melting type, and a hot pressure type.
Thus, the above adhesive can be applied by, for example, a roll coating method, a gravure roll coating method, a kiss coating method, a coating method or the like, or a printing method. The coating amount is preferably about 0.1 to 10 g / m ² (dry state).

Next, in the present invention, the anchor coat agent layer constituting the laminated material according to the present invention will be described. As the anchor coat agent constituting such an anchor coat agent layer, for example, alkyl titane is used. Various water-based or oil-based anchor coating agents such as organic titanium-based, isocyanate-based, polyethyleneimine-based, polyptadiene-based, etc. can be used.
The above-mentioned anchor coating agent can be coated using a coating method such as a roll coat, a gravure roll coat, a kiss coat, and the like. The amount is preferably about 0.1 to 5 g / m ² (dry state).

Examples of the melt-extruded resin layer in the extrusion lamination method described above include, for example, polyethylene resins, polypropylene resins, acid-modified polyethylene resins, acid-modified polypropylene resins, ethylene-acrylic acid or methacrylic acid copolymers. , Thermoplastic resins such as styrene resin, ethylene-vinyl acetate copolymer, polyvinyl acetate resin, ethylene-acrylic acid ester or methacrylic acid ester copolymer, polystyrene resin, polyvinyl chloride resin, etc. 1 type (s) or 2 or more types can be used.
In the extrusion laminating method described above, in order to obtain stronger adhesive strength, for example, lamination can be performed via an anchor coating agent layer such as the above-described anchor coating agent. .

In the present invention, as the primer agent layer, for example, polyurethane resin, polyester resin, polyamide resin, epoxy resin, phenol resin, (meth) acrylic resin, polyvinyl acetate resin A primer layer can be formed using a resin composition having a main component of a vehicle, such as polyethylene resin or polyolefin resin such as polypropylene, or a copolymer or modified resin thereof, cellulose resin, or the like. .
In the present invention, for example, a primer coating layer is formed by coating using a coating method such as a roll coat, a gravure roll coat, a kiss coat, or the like. Therefore, the coating amount is preferably about 0.1 to 10 g / m ² (dry state).
Moreover, in this invention, when performing said lamination | stacking, if necessary, pre-treatments, such as a corona treatment and an ozone treatment, can be given to a film.

Thus, in the present invention, a method for making a packaging bag according to the present invention using the laminated material according to the present invention as described above will be described. Use the inner-peel sealant according to the present invention as the heat-sealable material of the inner layer facing each other and fold it up Furthermore, the peripheral edge part is heat-sealed to provide a seal part, and packaging bags having various forms can be made.
Thus, as a bag-making method, the above-mentioned laminated material is folded with the inner layer faces facing each other, or the two sheets are overlapped, and the peripheral edge of the outer periphery is, for example, a side sheet. Seal type, two-sided seal type, three-sided seal type, four-sided seal type, envelope-sealed seal type, jointed seal type (pillar seal type), pleated seal type It is possible to manufacture various types of packaging bags according to the present invention by heat sealing in the form of a heat seal such as a flat bottom seal type, a square bottom seal type, or the like.
In addition, for example, a self-supporting packaging bag (standing pouch) or the like can be manufactured, and in the present invention, a tube container or the like can also be manufactured using the above-described laminated material.
In the above, as the heat seal method, for example, a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high frequency seal, an ultrasonic seal and the like are known. It can be done by the method.
In the present invention, a spout such as a one-piece type, a two-piece type, or the like, or a zipper for opening and closing can be arbitrarily attached to the packaging bag as described above.

  Next, in the case of a liquid-filled paper container including a paper base material as a packaging container, first, a laminated material obtained by laminating a paper base material is produced as a laminated material, and a blank for producing a desired paper container therefrom. Manufacturing a plate, and then boxing the body, bottom, head, etc. using the blank plate, for example, manufacturing a brick-type, flat-type or gable-top type liquid paper container, etc. Can do.

Furthermore, in the present invention, the laminated material according to the present invention as described above can also be used as a lid material for sealing the opening of a plastic molded container having a desired shape.
Thus, in the present invention, various plastic molded containers that use and seal the lid according to the present invention include, for example, polyethylene resins, polypropylene resins, and ethylene-propylene copolymers as molding resins. Polyacrylic or polymethylmethacrylic resin, polyvinyl chloride resin, vinyl chloride-vinylidene chloride copolymer, polyacrylonitrile resin, polystyrene resin, acrylonitrile-styrene copolymer (AS resin), acrylonitrile- Butadiene-styrene copolymer (ABS resin), polyester resin, polyamide resin, polycarbonate resin, fluorine resin, diene resin, polyacetal resin, polyurethane resin, nitrocellulose, Use other molding resins, for example, extrusion molding, injection Shape, blow - molding, foam molding, thermoforming such as vacuum-pressure, cast molding, compression molding, it is possible to use plastic molded container of molded variety with forming method other like.
In the present invention, the heat sealing method between the lid member and the plastic molded container may be, for example, a bar seal, a rotary roll seal, a belt seal, an impulse seal, or a high frequency. It can be performed by a known method such as a seal or an ultrasonic seal.
Further, in the present invention, the contents to be filled and packaged in a plastic molded container include, for example, various foods and drinks, chemicals such as adhesives and adhesives, cosmetics, detergents, pharmaceuticals, miscellaneous goods such as chemical warmers, Various articles such as others can be filled and packaged.

In the present invention, the packaging bag produced as described above includes, for example, food and drink, fruit juice, juice, drinking water, liquor, cooked food, marine product, frozen food, meat product, boiled food, rice cake, liquid meal. -Contents made up of various foods and beverages such as coffee, seasonings, chemicals such as adhesives, pressure-sensitive adhesives, liquid detergents, etc., miscellaneous goods such as cosmetics, pharmaceuticals, chemical warmers, photosensitive materials, and other articles Can be filled and packaged.
Thus, in the present invention, in particular, for example, a self-supporting bag for filling and packaging soy sauce, sauce, and soup, a self-supporting bag for filling and packaging fresh confectionery, and a packaging bag for filling and packaging frozen food Alternatively, it is useful as a self-supporting bag for filling and packaging liquid food and drink such as a self-supporting bag filled and packaged with boiled or retort food, etc.
In the present invention, for example, from the opening of the self-supporting bag manufactured as described above, for example, food and drink and other contents are filled, and then the upper opening is heat sealed and the upper sheet is placed. -Forming a lug part etc., Furthermore, a boil process, a retort process, etc. are given as needed, and the packaged product which consists of various forms can be manufactured.
In the present invention, it is particularly useful as a self-supporting bag for filling and packaging photosensitive materials as industrial materials, for example, articles such as films, photosensitive agents, and the like.
Furthermore, the easy-peel sealant according to the present invention is excellent in heat-sealability as a heat-seal material, and can sufficiently satisfy its sealing property. In addition to satisfying the requirements of quality protection, extension of storage period, etc., it also has excellent easy peelability and has an easy-opening property that allows easy opening of packaging bags when consumed. Furthermore, it is possible to form a very beautiful peeling interface in which no phenomenon such as stringing is observed at the peeling interface, and it can be applied to various plastic molding container lids and the like.

Thus, in the present invention, the packaged product manufactured as described above is such that the easy-peel sealant according to the present invention is excellent in heat seal performance and has an easy-opening property as well as a sealing property. It functions as a very useful heat-seal resin layer.
Next, the present invention will be described more specifically with reference to examples.

(1). First, the following resin compositions (a) and (b) were prepared.
(I). Resin composition constituting first layer Medium density polyethylene-α-olefin copolymer (manufactured by Prime Polymer Co., Ltd., trade name, Neozex 3510F, density = 0.935 g / cm ³ , melt flow as base resin layer -Rate: MFR = 1.6 g / 10 min) 100 parts by weight were sufficiently kneaded to prepare a resin composition.
(B). Resin composition constituting second layer Polypropylene resin as a cohesive failure layer (manufactured by Nippon Polyethylene Co., Ltd., trade name, Novatec FL02C, density = 0.900 g / cm ³ , melt flow rate, MFR = 18.0 g / 10 min) 70 parts by weight and 30 parts by weight of high-density polyethylene (manufactured by Prime Polymer Co., Ltd., trade name, Hi-Zex 3300F, density = 0.950 g / cm ³ , melt flow rate, MFR = 1.1 g / 10 min) To prepare a resin composition.
(2). Next, using the resin composition prepared as described above, using a two-type two-layer top-blown air-cooled inflation coextrusion film-forming machine, the layer of the resin composition of (A) is 30 μm, ( The layer of the resin composition of (b) is coextruded to 20 μm to form a film, and an easy-peel sealant according to the present invention comprising two types and two layers of coextruded inflation film with a total thickness of 50 μm. Manufactured.
(3). Next, on a corona-treated surface of a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm, a two-component curable polyurethane laminating adhesive (main agent: polyester polyol, curing agent: aliphatic isocyanate) ) Is coated using a gravure roll coating method to form a laminating adhesive layer having a thickness of 3.0 g / m ² (dry), and then the laminating adhesive layer. A biaxially stretched polyethylene terephthalate film having a thickness of 12 μm was superposed on the surface of the film so that the surface of the corona-treated surface was opposed to each other, and both were dry laminated.
Further, on the other corona-treated surface of the biaxially stretched polyethylene terephthalate film dry-laminated as described above, a two-component curable polyurethane laminating adhesive (main agent: polyester polyol) is used in the same manner as described above. , Curing agent: aliphatic isocyanate) is coated using a gravure roll coating method to form a laminating adhesive layer having a thickness of 3.0 g / m ² (dry). A base layer comprising a resin layer made of the resin composition (a) having a thickness of 30 μm and using the above-described easy peel sealant produced on the surface of the adhesive layer for laminating. After the corona discharge treatment was applied to the surface, the corona treatment surfaces were opposed to each other and overlapped, and then both were dry laminated to produce a lid according to the present invention.
(4). Next, using the lid material produced above, first, a cup-shaped molded container made of polypropylene resin is filled with water, and then the lid material produced above is applied to the surface of the flange portion of the opening. The surface of the easy peel sealant is placed facing each other, and then sealed from the flat seal under the conditions of a seal temperature of 200 ° C., 1 kg / cm ² , 1 second, and a cup A packaged product was produced by filling and packaging water in a molded container.
The packaged product manufactured above did not show any leakage of contents or tearing of the lid.
Furthermore, when the drop test of the packaged product from 1 m was performed three times, no tearing, leakage, etc. were observed.
The packaged product had good easy-openability (easy-peel property), and no tearing, tearing, stringing, etc. were observed during peeling.
Also, when projecting seal from a cup container having a line seal (ring seal) or projecting flange performed at a high pressure was performed, the seal layer did not break down and very stable pinning occurred. -It showed the behavior.

(1). First, the following resin compositions (a) and (b) were prepared.
(I). Resin composition constituting first layer Medium density polyethylene-α-olefin copolymer (manufactured by Prime Polymer Co., Ltd., trade name, Neozex 3510F, density = 0.935 g / cm ³ , melt flow as base resin layer -Rate: MFR = 1.6 g / 10 min) 100 parts by weight were sufficiently kneaded to prepare a resin composition.
(B). Resin composition constituting second layer Polypropylene resin as a cohesive failure layer (manufactured by Nippon Polyethylene Co., Ltd., trade name, Novatec FL02C, density = 0.900 g / cm ³ , melt flow rate, MFR = 18.0 g / 10 min) 70 parts by weight and 30 parts by weight of high-density polyethylene (manufactured by Prime Polymer Co., Ltd., trade name, Hi-Zex 3300F, density = 0.950 g / cm ³ , melt flow rate, MFR = 1.1 g / 10 min) To prepare a resin composition.
(2). Next, using the resin composition prepared above, using a two-type two-layer top-blown air-cooled inflation co-extrusion film forming machine, the layer of the resin composition (a) is 20 μm, ( (B) Easy-peel sealant according to the present invention comprising a co-extruded inflation film having a total thickness of 50 μm of two types and two layers by coextrusion of the layers of the resin composition of 30) to 30 μm. Manufactured.
(3). Next, on a corona-treated surface of a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm, a two-component curable polyurethane laminating adhesive (main agent: polyester polyol, curing agent: aliphatic isocyanate) ) Is coated using a gravure roll coating method to form a laminating adhesive layer having a thickness of 3.0 g / m ² (dry), and then the laminating adhesive layer. A biaxially stretched polyethylene terephthalate film having a thickness of 12 μm was superposed on the surface of the film so that the surface of the corona-treated surface was opposed to each other, and both were dry laminated.
Further, on the other corona-treated surface of the biaxially stretched polyethylene terephthalate film dry-laminated as described above, a two-component curable polyurethane laminating adhesive (main agent: polyester polyol) is formed in the same manner as described above. , Curing agent: aliphatic isocyanate) is coated using a gravure roll coating method to form a laminating adhesive layer having a thickness of 3.0 g / m ² (dry). A base layer comprising a resin layer made of the resin composition (a) having a thickness of 20 μm and using the above-described easy peel sealant produced on the surface of the adhesive layer for laminating. After the corona discharge treatment was applied to the surface, the corona treatment surfaces were opposed to each other and overlapped, and then both were dry laminated to produce a lid according to the present invention.
(4). Next, using the lid material produced above, first, a cup-shaped molded container made of polypropylene resin is filled with water, and then the lid material produced above is applied to the surface of the flange portion of the opening. The surface of the easy peel sealant is placed facing each other, and then sealed from the flat seal under the conditions of a seal temperature of 200 ° C., 1 kg / cm ² , 1 second, and a cup A packaged product was produced by filling and packaging water in a molded container.
The packaged product manufactured above did not show any leakage of contents or tearing of the lid.
Furthermore, when the drop test of the packaged product from 1 m was performed three times, no tearing, leakage, etc. were observed.
The packaged product had good easy-openability (easy-peel property), and no tearing, tearing, stringing, etc. were observed during peeling.
Also, when projecting seal from a cup container having a line seal (ring seal) or projecting flange performed at a high pressure was performed, the seal layer did not break down and very stable pinning occurred. -Le

(1). First, the following resin compositions (a) and (b) were prepared.
(I). Resin composition constituting first layer High-density polyethylene-α-olefin copolymer (manufactured by Prime Polymer Co., Ltd., trade name, Hi-Zex 3300F, density = 0.950 g / cm ³ , melt flow as base resin layer -Rate: MFR = 1.0 g / 10 min) 100 parts by weight was sufficiently kneaded to prepare a resin composition.
(B). Resin composition constituting second layer Polypropylene resin as a cohesive failure layer (manufactured by Nippon Polyethylene Co., Ltd., trade name, Novatec FL02C, density = 0.900 g / cm ³ , melt flow rate, MFR = 18.0 g / 10 min) 70 parts by weight and 30 parts by weight of high-density polyethylene (manufactured by Prime Polymer Co., Ltd., trade name, Hi-Zex 3300F, density = 0.950 g / cm ³ , melt flow rate, MFR = 1.1 g / 10 min) To prepare a resin composition.
(2). Next, using the resin composition prepared above, using a two-type two-layer top-blown air-cooled inflation co-extrusion film-forming machine, the layer of the resin composition of (A) is 30 μm, ( The layer of the resin composition of (b) is coextruded to 20 μm to form a film, and an easy-peel sealant according to the present invention comprising two types and two layers of coextruded inflation film with a total thickness of 50 μm. Manufactured.
(3). Next, on a corona-treated surface of a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm, a two-component curable polyurethane laminating adhesive (main agent: polyester polyol, curing agent: aliphatic isocyanate) ) Is coated using a gravure roll coating method to form a laminating adhesive layer having a thickness of 3.0 g / m ² (dry), and then the laminating adhesive layer. A biaxially stretched polyethylene terephthalate film having a thickness of 12 μm was superposed on the surface of the film so that the surface of the corona-treated surface was opposed to each other, and both were dry laminated.
Further, on the other corona-treated surface of the biaxially stretched polyethylene terephthalate film dry-laminated as described above, a two-component curable polyurethane laminating adhesive (main agent: polyester polyol) is formed in the same manner as described above. , Curing agent: aliphatic isocyanate) is coated using a gravure roll coating method to form a laminating adhesive layer having a thickness of 3.0 g / m ² (dry). A base layer comprising a resin layer made of the resin composition (a) having a thickness of 30 μm and using the above-described easy peel sealant produced on the surface of the adhesive layer for laminating. After the corona discharge treatment was applied to the surface, the corona treatment surfaces were opposed to each other and overlapped, and then both were dry laminated to produce a lid according to the present invention.
(4). Next, using the lid material produced above, first, a cup-shaped molded container made of polypropylene resin is filled with water, and then the lid material produced above is applied to the surface of the flange portion of the opening. The surface of the easy peel sealant is placed facing each other, and then sealed from the flat seal under the conditions of a seal temperature of 200 ° C., 1 kg / cm ² , 1 second, and a cup A packaged product was produced by filling and packaging water in a molded container.
The packaged product manufactured above did not show any leakage of contents or tearing of the lid.
Furthermore, when the drop test of the packaged product from 1 m was performed three times, no tearing, leakage, etc. were observed.
The packaged product had good easy-openability (easy-peel property), and no tearing, tearing, stringing, etc. were observed during peeling.
Also, cup containers with wire seals (ring seals) and protruding flanges performed at high pressure

(1). First, the following resin compositions (a) and (b) were prepared.
(I). Resin composition constituting the first layer As a base resin layer, a functional polypropylene block and a polymer (trade name, PC380A, density = 0.900 g / cm ³ , manufactured by Sun Aroma Co., Ltd.), melt flow rate: MFR = A resin composition was prepared by sufficiently kneading 100 parts by weight of 1.0 g / 10 min.
(B). Resin composition constituting second layer Polypropylene resin as a cohesive failure layer (manufactured by Nippon Polyethylene Co., Ltd., trade name, Novatec FL02C, density = 0.900 g / cm ³ , melt flow rate, MFR = 18.0 g / 10 min) 70 parts by weight and 30 parts by weight of high-density polyethylene (manufactured by Prime Polymer Co., Ltd., trade name, Hi-Zex 3300F, density = 0.950 g / cm ³ , melt flow rate, MFR = 1.1 g / 10 min) To prepare a resin composition.
(2). Next, using the resin composition prepared above, using a two-type two-layer top-blown air-cooled inflation co-extrusion film-forming machine, the layer of the resin composition of (A) is 30 μm, ( The layer of the resin composition of (b) is coextruded to 20 μm to form a film, and an easy-peel sealant according to the present invention comprising two types and two layers of coextruded inflation film with a total thickness of 50 μm. Manufactured.
(3). Next, on a corona-treated surface of a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm, a two-component curable polyurethane laminating adhesive (main agent: polyester polyol, curing agent: aliphatic isocyanate) ) Is coated using a gravure roll coating method to form a laminating adhesive layer having a thickness of 3.0 g / m ² (dry), and then the laminating adhesive layer. A biaxially stretched polyethylene terephthalate film having a thickness of 12 μm was superposed on the surface of the film so that the surface of the corona-treated surface was opposed to each other, and both were dry laminated.
Further, on the other corona-treated surface of the biaxially stretched polyethylene terephthalate film dry-laminated as described above, a two-component curable polyurethane laminating adhesive (main agent: polyester polyol) is formed in the same manner as described above. , Curing agent: aliphatic isocyanate) is coated using a gravure roll coating method to form a laminating adhesive layer having a thickness of 3.0 g / m ² (dry). A base layer comprising a resin layer made of the resin composition (a) having a thickness of 30 μm and using the above-described easy peel sealant produced on the surface of the adhesive layer for laminating. After the corona discharge treatment was applied to the surface, the corona treatment surfaces were opposed to each other and overlapped, and then both were dry laminated to produce a lid according to the present invention.
(4). Next, using the lid material produced above, first, a cup-shaped molded container made of polypropylene resin is filled with water, and then the lid material produced above is applied to the surface of the flange portion of the opening. The surface of the easy peel sealant is placed facing each other, and then sealed from the flat seal under the conditions of a seal temperature of 200 ° C., 1 kg / cm ² , 1 second, and a cup A packaged product was produced by filling and packaging water in a molded container.
The packaged product manufactured above did not show any leakage of contents or tearing of the lid.
Furthermore, when the drop test of the packaged product from 1 m was performed three times, no tearing, leakage, etc. were observed.
The packaged product had good easy-openability (easy-peel property), and no tearing, tearing, stringing, etc. were observed during peeling.
Also, cup containers with wire seals (ring seals) and protruding flanges performed at high pressure

(Experimental example)
The following physical properties were measured for the lid material according to the present invention manufactured using the easy-peel sealant according to the present invention manufactured in Examples 1 to 4 above.
(1). Measurement of Film Thickness This is about the lid material according to the present invention manufactured using the easy-peel sealant according to the present invention manufactured in Examples 1 to 4, manufactured by Sony Corporation, μ- Measured with a meter.
(2). Measurement of seal strength This is from the impulse sealer for the lid material according to the present invention manufactured using the easy peel sealant according to the present invention manufactured in Examples 1-4. The surfaces of the easy-peel sealant constituting the cover material according to the present invention were overlapped and sealed, and the T-peel strength was measured under the conditions of 15 mm width and 300 mm / min.
(3). Measurement of peel strength A strip-shaped test piece having a width of 15 mm was cut out, and a flat seal was applied to the surface of the flange portion of the opening of the polypropylene resin cup-shaped container, and a seal temperature of 200 ° C., 1 kg / Sealing was performed under conditions of cm ² and 1 second.
Next, a tensile test was performed at 300 mm / min with a tensile tester, and measurement was performed.
The measurement results are shown in Table 1 below.

(Table 1)
┌────┬──────┬────────┬─────────────┐ │ │ Film thickness │ Seal strength │ Cup product │ │ │ (μm) │ (N / 15 mm) │ Peel strength (N / 15 mm) │ ├────┼─────┼────────┼─────── ───────┤ │Example 1│ 80 │ 11.9 │ 10.4 │ ├────┼──────┼────────┼────── ────────┤ │Example 2│ 80 │ 11.8 │ 10.9 │ ├────┼──────┼────────┼──── ─────────┤ │Example 3│ 80 │ 12.4 │ 11.3 │ ├────┼──────┼────────┼─── ──────────┤ │Example 4│ 80 │ 12.9 │ 11.2 │ └────┴──────┴─ ──────┴─────────────┘

  As is clear from the results shown in Table 1 above, the lid material according to the present invention manufactured using the easy peel sealant according to the present invention has a heat seal property, -Excellent in peelability and the like.

  Furthermore, the easy-peel sealant according to the present invention is excellent in heat-sealability as a heat-seal material, and can sufficiently satisfy its sealing property. In addition to satisfying the requirements of quality protection, extension of storage period, etc., it also has excellent easy peelability and has an easy-opening property that allows easy opening of packaging bags when consumed. Furthermore, it is possible to form a very beautiful peeling interface in which no phenomenon such as stringing is observed at the peeling interface, and it can be applied to various plastic molding container lids and the like.

It is a schematic sectional drawing which shows the layer structure of the example about the easy-peel sealant which concerns on this invention. It is a schematic sectional drawing which shows the layer structure of the example about the cover material which concerns on this invention manufactured using the easy-peel sealant which concerns on this invention. It is a schematic sectional drawing which shows the layer structure of the example about the cover material which concerns on this invention manufactured using the easy-peel sealant which concerns on this invention. It is a schematic sectional drawing which shows the layer structure of the example about the packaged product which concerns on this invention which consists of the plastic molding container based on this invention manufactured using the cover material based on this invention shown in FIG.

Explanation of symbols

A Easy peel sealant B Cover material B ₁ Cover material C Packaged product 1 Base material layer 1a Resin layer 2 Seal layer 2a Resin layer 3 Co-extruded laminated film 3a Co-extrusion of both resin layers Laminated film 11 Base sheet 12 Print pattern 21 Plastic molding container 22 Contents 23 Flange

Claims (5)

A resin layer comprising a co-extruded laminated film of at least a base material layer and a seal layer, and further comprising the above base material layer as a main component of medium density polyethylene, high density polyethylene or polypropylene. In addition, the above-mentioned seal layer is made of polypropylene and high-density polyethylene having a melt flow rate (MFR) in the range of 10 to 40 g / 10 minutes, with respect to the former 50 to 90 parts by weight. The latter comprising an resin layer composed of a resin composition mainly composed of a mixture of 10 to 50 parts by weight of the latter, and comprising a coextruded laminated film of both resin layers. Runt. 2. The image according to claim 1, wherein the polypropylene constituting the seal layer is a polypropylene having a melt flow rate (MFR) in the range of 15 to 25 g / 10 minutes. -Peel sealant. The blending ratio of polypropylene and high-density polyethylene constituting the seal layer is composed of a blending ratio of 20 to 40 parts by weight of the latter with respect to 60 to 80 parts by weight of the former. The easy-peel sealant described in any one of the items. The easy-peel sealant according to any one of claims 1 to 3, wherein the base material layer has a thickness of 10 µm to 50 µm. The easy peel sealant according to any one of claims 1 to 4, wherein the seal layer has a thickness of 15 µm to 40 µm.

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