JP2002370772A - Easy-open blister pack - Google Patents

Abstract

(57) [Summary] [Problem] A polypropylene-based resin container and a polyolefin-based resin, which do not need to be separated when disposed of as garbage after being taken out of the product, have a tear-resistant property, have an easy-opening property, and can easily take out the product. A blister pack comprising a resin lid is provided. SOLUTION: This is a blister pack comprising a lid (i) and a contents storage body (ii), wherein the lid (i) has an opacity of 7 or more.
An easy-opening blister pack comprising a uniaxially stretched thermoplastic resin film of 0% or more, wherein the lid (i) is easily torn in the stretching direction when opened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package called a blister pack, and more particularly to a container and a lid made of a polypropylene resin which can be easily taken out when the contents contained in the package are taken out of the package. The present invention relates to a package comprising a body.

[0002]

2. Description of the Related Art Usually, a lid material for a blister pack is formed of paper. This blister pack is not only susceptible to water wetting, but also when the product is taken out of the blister pack and discarded as garbage, it is necessary to sort the plastic molded body, which is the content storage body, and the paper lid. Therefore, recently, a film made of a thermoplastic resin has been used as an alternative to a paper lid, and this film and the outer peripheral portion of a plastic molded body as a content storage body are sealed by heat or fusing. A blister pack provided with excellent adhesive strength is provided. However, since this blister pack has excellent adhesive strength, a portion serving as an opening start end is provided to make it easy to take out the product.However, when tearing the film from the opening start end at the time of opening, tearing is performed. If the film is not easily torn, such as when the direction is not constant or the film is easily stretched, or even if the film is torn, the film partially remains in the adhesive portion of the contents container, and the product cannot be taken out promptly. Etc. are not easy to open.

[0003]

SUMMARY OF THE INVENTION The present invention relates to a polypropylene resin which does not need to be separated when it is disposed of as garbage after being taken out of the product, has tear-opening properties, has an easy-opening property, and can be easily taken out of the product. An object of the present invention is to provide a blister pack comprising a container and a lid of a polyolefin resin.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, have added an appropriate amount of inorganic fine powder and / or organic fine filler to a polyolefin resin as a lid. It has been found that by using a uniaxially stretched multilayer resin stretched film, the film has characteristics meeting the object of the present invention, and the present invention has been completed.
That is, the present invention relates to a blister pack comprising a lid (i) and a content container (ii), wherein the lid (i) comprises a uniaxially stretched film of a thermoplastic resin having an opacity of 70% or more, An easily-opening blister pack, wherein the lid (i) is easily torn in the stretching direction at the time of opening.

FIG. 1 is a front view of an easily-openable blister pack of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a schematic view of the easily-openable blister pack at the time of opening.
FIG. 1 shows a blister pack in which the lid (i) is bonded or sealed by heat or fusing along the outer periphery of the content container (ii) in FIG. By using a thermoplastic resin film stretched in the
As shown in the figure, the lid (i) easily tears in the stretching direction at the time of opening to provide an easy-open blister pack from which the contents can be easily taken out.

[0006] The opacity (JIS-P8138) of the thermoplastic resin multilayer structure as the lid (i) of the present invention is 70% or more. In order to make it easier to take out the material, the Elmendorf tear strength (JIS-P
8116) is 1.5 or more, preferably 3 or more, and the Elmendorf tear strength in the stretching orientation direction is 1 kgf / cm or more. Also, as shown in FIG. 1, at least one perforation (iii) serving as an opening start end is provided on the lid (i) so as to be orthogonal to the extending direction, and further, as shown in FIG. Is the opening start end where a force is applied with a finger F or the like.

The thermoplastic resin multilayer structure as the lid (i) of the present invention has a polyolefin resin (A) of 40 to 90.
% By weight, inorganic fine powder and / or organic filler (B) 6
A uniaxially stretched film containing 0 to 10% by weight is used as a base material layer, and at least one surface thereof has 70 to 100% by weight of a polyolefin resin (C) and 30 to 0% of an antistatic agent (D).
% By weight, inorganic fine powder and / or organic filler (B) 3
The polyolefin resin (C) has a melting point of 80 ° C to 140 ° C.
The blister pack according to the present invention includes a content storage body (i
The product object is placed in a polypropylene sheet container formed by thermoforming i), and a lid (i), which is a uniaxially stretched film subjected to double-sided printing, is placed on the container, and the container is heated or melted from the upper surface. It is a sealed easy-open blister pack.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of an embodiment of a lid for a blister pack according to the present invention. [Configuration of Lid for Easy-Opening Blister Pack] The lid (i) for the easy-opening blister pack in the present invention is a thermoplastic resin containing a structural unit in which a surface layer (b) is laminated on a base material layer (a). It is a lid made of a resin film. This structural unit may have a structure in which a surface layer (b) is laminated on both surfaces of the base material layer (a). The base material layer (a) is composed of a polyolefin resin (A) and an inorganic fine powder and / or an organic filler (B).
It contains. The melting point of the surface layer (b) is 80 ° C or higher.
140 ° C. polyolefin resin (C), antistatic agent (D), inorganic fine powder and / or organic filler (B)
It contains.

The type of the polyolefin resin (A) used for the base layer (a) is not particularly limited. Preferably, an α-olefin homopolymer having 2 to 8 carbon atoms, such as ethylene, propylene, butene-1, hexene-1, octene-1, heptene-1, and 4-methylpentene-1, or a mixture of these α-olefins Two or more copolymers are included. Specifically, high-density polyethylene, propylene homopolymer, ethylene / propylene copolymer, propylene / butene-1 copolymer, propylene / ethylene / butene-1 copolymer, propylene / 3-methylpentene-1 copolymer Polymers. Particularly preferred is a propylene homopolymer. In this specification, “to” means a range including the numerical values described before and after.

As the polyolefin resin (A), its melt flow rate (230 ° C., 2.16 kg load)
Is preferably in the range of 0.5 to 30 g / 10 minutes.
Examples of the inorganic fine powder used for the base material layer (a) include heavy calcium carbonate, light calcium carbonate, calcined clay, talc, titanium oxide, barium sulfate, zinc oxide, magnesium oxide, diatomaceous earth, and silicon oxide. Can be done.
Above all, heavy calcium carbonate and titanium oxide are preferable, because a large number of pores are formed at the time of stretching and white opaque film lids can be obtained at low cost.

As the organic filler, when the thermoplastic resin film is an olefin resin film, polyethylene terephthalate, polybutylene terephthalate,
Polycarbonate, nylon-6, nylon-6,6,
A homopolymer of a cyclic olefin, a copolymer of a cyclic olefin and ethylene, or the like, having a melting point of 120 to 300 ° C,
Or those having a glass transition temperature of 120 to 280 ° C. Among them, it is preferable to use a homopolymer of cyclic olefin or a copolymer of cyclic olefin and ethylene from the viewpoint of handling.

For the base material layer (a), one of the above fine powders may be selected and used alone, or two or more may be selected and used in combination. . The preferable range of the average particle size of the fine powder is 0.1 to 30 μm. When the particle diameter is less than 0.1 μm, a large amount of aggregates due to poor dispersion are generated when mixed with the polyolefin resin,
It may cause stretching breakage. Further, it is difficult to form pores by stretching, and a desired white and opaque stretched film lid cannot be obtained. If the average particle size exceeds 30 μm, the stretchability is greatly reduced and the stretch breakage increases. Further, it appears as a protrusion on the surface layer (b), and the surface smoothness is reduced, so that high-definition printing cannot be performed.

The polyolefin resin (C) used for the surface layer (b) has a melting peak temperature by DSC of 80 ° C.
Those having a temperature of 140 ° C, more preferably in the range of 100 ° C to 140 ° C, are preferable for obtaining the required sealing strength (400 g / cm or more) as a lid for a blister pack. When the melting peak temperature is lower than 80 ° C., when the cover (i) is stretch-formed, the cover (i) is fused to a roll or a clip, and the moldability is significantly deteriorated. Specifically, propylene / ethylene random copolymer, low density polyethylene, ethylene / vinyl acetate copolymer, ethylene / acrylic acid alkyl ester copolymer (alkyl group having 1 to 4 carbon atoms) and Surlyn (trade name) Is mentioned. Preferably, a propylene-based random copolymer polymerized with a metallocene catalyst is preferred.

As the inorganic fine powder and / or organic filler used in the surface layer (b), the inorganic fine powder and / or organic filler described in the description of the base layer (a) can be used. As the antistatic agent (D) used in the surface layer (b), a resin composition comprising a polypropylene resin, an aromatic ring-containing polyetheresteramide, a polyamide resin, and a modified low molecular weight polypropylene lowers the sealing strength at low temperatures. Is preferable in that the printability is reduced and printability is improved. These resin compositions may be used as a mixture, or a mixture of a polyamide resin and polypropylene obtained by copolymerizing a modified low molecular weight polypropylene in the course of polymerization of an aromatic ring-containing polyetheresteramide resin. May be. The base material layer (a) is formed by stretching a resin composition containing 40 to 90% by weight of a polyolefin resin (A), 10 to 60% by weight of an inorganic fine powder and / or an organic fine filler (B). . The polyolefin-based resin (A) in the base material layer (a) contributes to the strength, rigidity and heat resistance of the lid (i), which is a stretched multilayer resin film, so that the blending amount is 40% by weight or more. 4
If the amount is less than 0% by weight, sufficient strength, rigidity and heat resistance cannot be obtained, and furthermore, stretch breakage or the like occurs, and the moldability is greatly reduced.

Further, the amount of the inorganic fine powder and / or the organic filler (B) in the base material layer (a) contributes to the opacity of the lid (i) which is a stretched multilayer resin film.
0% by weight or more. If it is less than 10% by weight, a film lid having an opacity of 70% or more, more preferably 80% or more, required as a backing for a blister pack cannot be obtained. If the content is more than 60% by weight, stretch breakage, film cracking, etc. occur, and the moldability is greatly reduced. Surface layer (b)
Stretches a resin composition containing 70 to 100% by weight of a polyolefin resin (C), 30 to 0% by weight of an antistatic agent (D), and 30 to 0% by weight of an inorganic fine powder and / or an organic fine filler (B). It forms by doing.

The polyolefin resin (C) in the surface layer (b) contributes to the heat and fusing seal strength and the surface glossiness of the lid (i), which is a stretched multilayer resin film, so that 70%.
Weight% or more. If the content is less than 70% by weight, the seal strength at the time of heat and fusing is reduced, and in the case of a blister pack, there is a high risk that the product put in the container will fly out when transported or displayed at a store. The amount of the inorganic fine powder and / or the organic filler (B) in the surface layer (b) contributes to the heat and fusing seal strength and the surface glossiness of the lid (i), which is a multilayer resin stretched film. %. Considering the printing characteristics, the surface ink adhesion is good 1
0-20% by weight is preferred. The antistatic agent (D) in the surface layer (b) contributes to the ink adhesion in printability, the paper feeding / discharging property in sheet-fed offset printing, and the ink adhesion, and is therefore preferably 3% by weight to 30% by weight, and more preferably 30% by weight. If the temperature exceeds the range, the heat and the strength of the fusing seal greatly decrease.

The resin composition of the base layer (a) and the surface layer (b) may contain, if necessary, a heat stabilizer, an ultraviolet stabilizer, an antioxidant, an antiblocking agent, a nucleating agent, a lubricant, a dispersant, and the like. May be blended. These are preferably blended in a proportion of 3% by weight or less. The total thickness of the multilayer resin stretched film lid to be manufactured is preferably 40 to 400 μm, more preferably 60 to 350 μm, and further preferably 80 to 300 μm. The thickness of the base material layer (a) is 50% to 8% of the total thickness.
0% is preferred.

[Manufacture and Processing of Lid for Easy-Opening Blister Pack] The lid for easy-opening blister pack of the present invention comprises:
It can be produced by combining various methods known to those skilled in the art. A lid for an easily-openable blister pack manufactured by any method is included in the scope of the present invention as long as it satisfies the conditions described in the present invention. Each layer constituting the easy-opening blister pack lid of the present invention includes the above-mentioned polyolefin resin (A), inorganic fine powder and / or organic filler (B),
The polyolefin resin (C) and the antistatic agent (D) may be mixed at a predetermined ratio and formed by a method such as extrusion. Thereafter, by performing lamination and uniaxial stretching, the lid (i) for an easily-openable blister pack can be manufactured.

The easy-opening blister pack cover (i) of the present invention may be produced by separately stretching and laminating the base material layer (a) and the surface layer (b), It may be manufactured by laminating (a) and the surface layer (b) and then stretching them together. These methods can be appropriately combined. A preferred production method includes a step of laminating the base material layer (a) and the surface layer (b) and then stretching them together. Compared to the case of separately stretching and laminating, it is simpler and the manufacturing cost is lower. Various conventionally known methods can be used for stretching. The stretching is preferably performed at a temperature lower by at least 5 ° C. than the melting point of the resin having the lowest melting point among the resins used for each layer, and the stretching is performed in one axis direction. When the stored product used as the blister pack lid is taken out, the lid is torn linearly in one direction, so that the product can be easily taken out.

Specific examples of uniaxial stretching include inter-roll stretching utilizing a difference in peripheral speed between roll groups, and clip stretching using a tenter oven. Above all, uniaxial stretching between rolls is preferable because it is easy to arbitrarily adjust the stretching ratio to obtain a film having any rigidity, opacity, and glossiness. The stretching ratio is not particularly limited, and is determined in consideration of the purpose of use of the easily-openable blister pack lid of the present invention and the characteristics of the resin used. Usually, it is stretched within a range of 2 to 11 times. Among them, the stretching between rolls using the peripheral speed difference between rolls is 2 to 7
2 times, 5-11 for clip stretching performed in a hot oven
It is more preferable to stretch by a factor of two.

After the stretching, heat treatment is preferably performed. The temperature of the heat treatment is preferably selected within a range from the stretching temperature to a temperature 30 ° C. higher than the stretching temperature. By performing the heat treatment, the heat shrinkage rate in the stretching direction is reduced, and the crimping during storage of the product and the waving due to heat and shrinkage during fusing sealing are reduced. The heat treatment is generally performed using a roll and a hot oven, but these may be combined. These treatments are preferably carried out by heat-treating the stretched film while keeping it under tension, since a high treatment effect can be obtained. In addition, it is desirable to perform a corona treatment or a plasma treatment on the surface as necessary, because there is an advantage that the adhesion of the printing ink is improved. Further, an antistatic agent, an anchoring agent or the like may be applied or coated thereon.

Printing can be carried out on the surface layer (b) and the back surface of the easy-open blister pack lid of the present invention according to the purpose of use. The type and method of printing are not particularly limited. For example, printing can be performed using a known printing means such as gravure printing, flexographic printing, silk screen printing, offset printing, seal printing, UV offset printing, and offset rotary printing using an ink in which the content is dispersed in a known vehicle. . Also, printing such as metal deposition, metal foil pressing, varnish coating, and heat transfer printing can be performed. JIS of Lid for Easy-Opening Blister Pack of the Present Invention
The opacity measured by -P-8138 is preferably 70% or more, more preferably 80% or more. If the opacity is less than 70%, when printing is performed on both sides of the blister pack backing, characters and pictures printed on one side can be seen through the opposite side, so a barcode etc. is printed on the back side of the backing Barcode reading failure occurs when managing products.

[0023]

The present invention will be described more specifically with reference to the following examples, comparative examples and tests. Materials, used amounts, ratios, processing contents, processing procedures, and the like shown in the following examples can be appropriately changed without departing from the present invention. Therefore, the scope of the present invention should not be construed as being limited by the specific examples described below. The materials used in the following examples and comparative examples are summarized in Table 1. In addition, MFR in a table | surface means a melt flow rate. (Experimental Example 1) [Production of aromatic ring-containing polyetheresteramide] In a stainless steel autoclave having a content of 3 liters, 1
110 parts of 2-aminodecanoic acid, 16.3 parts of adipic acid,
0.3 parts of Irganox 1010 (Antioxidant manufactured by Ciba-Geigy: trade name) and 7 parts of water were charged, and the inside of the autoclave was replaced with nitrogen gas. 117 parts of a polyamide oligomer having an acid value of 107 having carboxyl groups at both ends were obtained. Next, 225 parts of a bisphenol A ethylene oxide adduct having a number average molecular weight of 2,000 and zirconyl acetate 0.1% were added.
Five parts were added, and the mixture was polymerized at 245 ° C. under a reduced pressure of 1 mmHg or less for 5 hours to obtain a polymer. The polymer was taken out in a strand form on a belt and pelletized to obtain a polyetheresteramide. The reduced viscosity (ηsp / C, m-cresol solvent, 25 ° C.,
C = 0.5% by weight) was 2.1. (Example 2) [Production of modified low molecular weight polyolefin] The number average molecular weight obtained by thermal degradation was 3,000, and the density was 0.92 g / cm ^3.
95 parts of low molecular weight polyethylene, 5 parts of maleic anhydride and 60 parts of xylene were melted at 140 ° C. in a nitrogen stream, and then a 50% xylene solution in which 1.5 parts of tertiary butyl peroxide was dissolved was added for 15 minutes. The reaction was carried out for 1 hour. After completion of the reaction, the solvent was distilled off to obtain an acid-modified low-molecular-weight polypropylene. This had a number average molecular weight of 5,000.

[0024]

[Table 1]

(Examples 1 to 7 and Comparative Examples 1 to 4) Lid for easy-open blister pack of the present invention (Examples 1 to 7) and lid for easy-open blister pack for comparison according to the following procedures. (Comparative Examples 1 to 4) were manufactured, and a blister pack was manufactured using these. Table 2 shows the types and amounts (% by weight) of the materials used in the production of each film lid, stretching conditions, Table 3 shows the physical properties of the obtained films, and Table 4
The seal strength, openability, and the danger of the contents popping out of the easily openable blister pack manufactured in Table 1 are shown. The blends [A] and [B] were prepared by mixing the polyolefin resin and the fine filler. The compound [A] and the compound [B] are melt-kneaded by three extruders set at 250 ° C., and the compound [B] is laminated on the front and back sides of the compound [A] in a die and extruded. It was molded and cooled to 70 ° C. in a cooling device to obtain a three-layer unstretched sheet.

After heating the formed three-layer unstretched sheet to a predetermined temperature, it is stretched in a longitudinal direction at a predetermined ratio between rolls, and after the stretching, heat-treated at a temperature higher than the stretching temperature by 20 ° C. A stretched film was obtained. However, in Comparative Example 3, a uniaxially stretched film similar to that described above was obtained, and then heated to 155 ° C., stretched 9 times in the transverse direction using a tenter stretching machine, and then heat-treated at a temperature 20 ° C. higher than the stretching temperature after stretching. To obtain a biaxially stretched film. In Comparative Example 4, stretching was not performed. Both surfaces of the obtained multilayer resin stretched film and multilayer non-stretched film were subjected to a corona treatment of 40 w / m ² · min using a discharge treatment machine (manufactured by Kasuga Electric Co., Ltd.) to obtain a multilayer resin stretched film.

Next, on the front and back surfaces of these multilayer resin stretched films, UV offset printing (ink; T & K, TOKA Co., Ltd.) (Best Cure 161S). The layer thickness of these films,
Physical properties were as shown in Table 3. A transparent blister case containing polypropylene as a main component, which is a content container containing a dry battery, is superimposed on the surface of these multilayer resin stretched films, and a heat sealer (made by Sugihara Iron Works Co., Ltd.) Heat sealed.

(Test Example) Each of the produced multilayer resin film lids was evaluated for opacity, printability, and tear strength. The details of each test are as shown below. 1) Opacity The manufactured multilayer resin stretched film was measured according to JIS-P-8138 using a measuring machine (trade name “SM Color Computer” manufactured by Suga Test Instruments Co., Ltd.). 2) Tear strength The Elmendorf tear strength of the produced multilayer resin stretched film is measured by a measuring instrument (manufactured by Tozai Seiki Co., Ltd .: trade name “Digital Elmendorf Tear Tester”) according to JIS-P-8116. The ratio of the MD direction, which is the stretching direction, to the CD direction, which is a direction perpendicular to the stretching direction, was measured.

3) Printing suitability Each of the produced multilayer resin stretched film mounts was prepared using a Kikuzen plate (636).
1000 mm in size (mm x 939 mm)
& K TOKA Co., Ltd .: Product name "Best Cure 1"
61S ") on a Heidelberg UV offset press at 7000 sheets / min. A) The paper discharging property was evaluated according to the following criteria. ：: Paper was fed and discharged without any problem for 1000 sheets in a row. Δ: 1 to 3 machine stoppages occurred during paper feeding. X: The machine stopped four or more times during paper feeding and was not aligned at the paper discharge unit. B) Evaluation of ink adhesion After sticking an adhesive tape (Nichiban Co., Ltd .: trade name "Cellotape") on the solid printed surface of the obtained printed matter and pressing it sufficiently, attach the adhesive tape to the adhesive surface. The film was peeled at a constant speed in the direction of 90 degrees. How the ink was removed from the stretched film mount was visually observed and evaluated according to the following criteria. ：: No ink is peeled off. Δ: Although there is resistance when the tape is peeled off, most of the ink is peeled off, and there is a practical problem. X: There is no resistance when the tape is peeled off, the entire amount of the ink is peeled off, and it cannot be used practically. 4) Seal strength The produced multilayer resin stretched film mount and a 0.2 mm thick polypropylene transparent sheet (made by Idemitsu Petrochemical Co., Ltd .:
Product name "Pure Softy") is overlaid, and the impulse sealer manufactured by Fuji Impulse Co., Ltd. Product name: "FI-
400Y ", and the sealed portion was cut to a width of 10 mm and the pulling speed was 30 m.
A 180 degree peel test was performed at m / min to determine the seal strength. A) Fusing seal strength Seal bar: 1 mm φ hot wire Holding time: 5.5 seconds Heating temperature: Adhesive part temperature about 180 ° C Heating time: 1.5 seconds b) Heat seal Seal bar: 5 mm wide hot plate Holding time: 5. 5 seconds Heating temperature: Adhesive part temperature about 180 ° C Heating time: 1.5 seconds

5) Evaluation of easy-opening property The lid, which is the produced multilayer resin stretched film, and the polypropylene transparent sheet, which is the content storage body, are overlapped and sealed, and the openability for taking out the content is determined according to the following criteria. evaluated. Regarding the contents, Mitsubishi Electric Corporation
AA battery brand name: "Power Alkaline" was used. ：: The tear direction is linearly torn in one direction. Δ: The tear direction is not constant. ×: The tear direction is not constant, and the film lid is easily stretched.

6) Evaluation of danger of contents jumping out A lid, which is a multilayer resin stretched film, and a polypropylene transparent sheet, which is a contents storage body, are overlapped and sealed, and the flange portion of the blister pack is picked up. The danger of contents jumping up, down, left and right 100 times was evaluated according to the following criteria. The contents used were AA batteries manufactured by Mitsubishi Electric Corporation, trade name: "Power Alkaline". ：: The contents do not pop out. ×: The contents pop out.

[0032]

[Table 2]

[0033]

[Table 3]

[0034]

[Table 4]

As is clear from the above results, the multilayer resin uniaxially stretched film lid of the present invention has excellent opacity and, when processed into a blister pack, has excellent openability and seal strength. (Examples 1 to 7) On the other hand, the multilayer resin stretched film out of the conditions of the present invention has poor properties and is not practical. (Comparative Examples 1-4)

[0036]

The multilayer resin stretched film lid of the present invention is
It is white and opaque, and when processed in a blister pack,
It has excellent openability when taking out products. For this reason, the multilayer resin stretched film lid of the present invention can be effectively used for a blister pack lid, a header label mount, a vacuum pack packing mount, and the like.

[Brief description of the drawings]

FIG. 1 is a front view of an easily-openable blister pack of the present invention.

FIG. 2 is a side view of the easy-open blister pack of the present invention.

FIG. 3 is a schematic view of the easy-open blister pack of the present invention at the time of opening.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08K 3/00 C08K 3/00 5/00 5/00 C08L 23/00 C08L 23/00 // (C08L 23 / 00 23:12 23:12 77:12 77:12 77:00 77:00 23:26 23:26) F term (reference) 3E067 AA11 BA33A BB16A BB18A CA21 CA30 EB03 EB10 FA01 FB02 FC01 GD10 4F100 AA08A AA08B AA21A AA21B AK03A AK03B AK05 AK06 AK07B AK49B BA02 BA07 CA22B CA23A CA23B EJ37 GB18 JA04A JL14 JN02 YY00A YY00B 4J002 BB001 BB031 BB055 BB0601 BB071 BB122 BB141 BB151 CL035 005 005 005 005 FD104 GG01

Claims (8)

[Claims] 1. A blister pack comprising a lid (i) and a contents container (ii), wherein the lid (i) has an opacity of 7.
An easy-opening blister pack comprising a uniaxially stretched thermoplastic resin film of 0% or more, wherein the lid (i) is easily torn in the stretching direction when opened. 2. The lid (i) is made of a uniaxially stretched film of a thermoplastic resin multilayer structure, and has a transverse direction (CD) and a longitudinal direction (MD).
Elmendorf tear strength ratio (CD / MD) of 1.5 or more and Elmendorf tear strength in the stretching direction of 1
The easy-open blister pack according to claim 1, wherein the blister pack is not less than kgf / cm. 3. The lid (i) according to claim 1, wherein at least one perforation (iii) serving as an opening start end is provided in a straight line so as to be orthogonal to the stretching direction. Easy-open blister pack. 4. The thermoplastic resin multilayer structure of the lid (i),
40 to 90% by weight of polyolefin resin (A) and 60 to 10% by weight of inorganic fine powder and / or organic filler (B)
And a polyolefin resin (C) 70 to 100% by weight, an antistatic agent (D) 30 to 0% by weight, an inorganic fine powder and / or an organic filler (B) on at least one surface thereof. The easy-open blister pack according to any one of claims 1 to 3, comprising a surface layer (b) containing 30 to 0% by weight. 5. The polyolefin resin (C) of the surface layer (b) has a melting point in the range of 80 ° C. to 140 ° C.
Blister pack described in. 6. The antistatic agent (D) of the surface layer (b) is a resin component composed of a polypropylene resin, an aromatic ring-containing polyetheresteramide, a polyamide resin, and a modified low molecular weight polypropylene. Blister pack described in. 7. An inorganic fine powder (B) comprising calcium carbonate,
The blister pack according to any one of claims 4 to 6, wherein the blister pack is a compound mainly containing titanium oxide. 8. The easy-open blister pack according to claim 1, wherein the content container (ii) is a transparent polypropylene sheet container.