JPS61258750A - Laminate and package using said laminate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a laminate and a package using the same, and more specifically, the present invention relates to a laminate and a laminate as a material suitable for constructing a sealed container for tablets, etc. The present invention relates to a package that can be used to suitably store tablets and the like. [Original technology and its problems] Conventionally, airtight packaging containers for pharmaceutical tablets, etc. have been made by providing a recess in a vinyl chloride sheet, storing the tablet in the recess, and then sealing the opening of the recess with, for example, aluminum foil. It is sealed with etc. However, when the used airtight packaging containers are incinerated in an incinerator, the burned calories of vinyl chloride are high.
Waste pollution has become a problem in recent years, such as damaging incinerators and emitting toxic gases that damage nearby areas. Therefore, packaging containers that use polypropylene instead of vinyl chloride sheets have been proposed, but polypropylene sheets have poor adhesion to aluminum foil, so the containers lack airtightness, and the calories burned by polypropylene are approx. Since it is 11,000 Kcal/Kg, it is still insufficient in terms of not damaging the combustion furnace. This invention was made based on the above-mentioned vehicle situation, and provides a sheet material that reduces waste pollution as much as possible, has excellent mechanical strength such as rigidity, and has excellent transparency, moisture resistance, and airtightness. Furthermore, it is an object of the present invention to provide a packaging body that exclusively utilizes the excellent properties of such a sheet material. [Means for Solving the Problems] The outline of the present invention for solving the problems described above is as follows: 20 to 80 parts by weight of polyolefin, 80 to 20 parts by weight of an inorganic filler that imparts transparency, and 0.5 parts by weight of modified polyolefin. 5 to 5 parts by weight of a resin composition sheet and a polyester resin sheet,
It also has a sheet of a resin composition consisting of 20 to 80 parts by weight of polyolefin, 80 to 20 parts by weight of an inorganic filler that imparts transparency, and 0.5 to 5 parts by weight of modified polyolefin, and a sheet of polyester resin, and is packaged. The opening of the recess of the laminate in which a recess capable of storing objects is formed,
This is a package using a laminate characterized by being sealed with a light-shielding member. Examples of the polyolefin include polyethylene such as high-density polyethylene, medium- and low-density polyethylene, and linear polyethylene, polypropylene such as isotactic polypropylene, syndiotactic polypropylene, and atactic polypropylene, polybutene, and 4-methyl-pentene-1. In addition, in the present invention, olefins such as ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ethylene-vinyl chloride copolymer, propylene-vinyl chloride copolymer and other vinyl monomers are used. Copolymers with can also be used. These various polyolefins may be used alone, or two or more of the above may be used as a blend. Copolymers containing vinyl chloride as one unit may also be used. This is possible because the vinyl chloride content in the copolymer is so small that it does not cause waste pollution. The inorganic filler may be any material as long as it can impart transparency to the sheet as a result of blending, such as talc, clay, mica, titanium oxide, feldspar, glass fiber, glass peas, and calcium silicate. , silicates such as montmorillonite and bentonite, and other glassy inorganic substances. These inorganic fillers can be used alone or in combination of two or more of the above inorganic fillers. Among the various inorganic fillers, talc, mica, feldspar, glass beads, titanium oxide, and the like are preferred. The inorganic filler may be in the form of a single particle, a plate, or a fiber, but in this invention, the particle size is 0.
It is desirable that the particle size of this inorganic filler is within the range of 0.01 to 20 g.If the particle size of this inorganic filler becomes smaller than 0.2 g, the effect will be small, and if the particle size becomes larger than 20 g, the resin composition will The dispersion in plastic moldings, the glossiness and smoothness of plastic molded products, and the smoothness after secondary processing all deteriorate. The modified polyolefins include polyolefins chemically modified with unsaturated carboxylic acids (including their anhydrides) or derivatives thereof, and polyolefins chemically modified with unsaturated carboxylic acids (including their anhydrides) or derivatives thereof; ,
) or chemically modified derivatives thereof can be suitably used. Here, terminal hydroxylated polybutadiene is suitable as the elastomer. In producing this modified polyolefin, for example, a polyolefin such as polypropylene, an elastomer, and an unsaturated carboxylic acid or its derivative are used in a solvent such as xylene, toluene, heptane, or monochlorobenzene using a radical generator such as benzoyl peroxide. The details of the method for producing this modified polyolefin, which can be reacted by using a polyolefin, are disclosed in JP-A-54-124049, so detailed explanation thereof will be omitted. Examples of the polyester resin include polyethylene terephthalate resin, polybutylene terephthalate resin, and the like. Preferred is polyethylene terephthalate resin. As shown in FIG. 1, a laminate 1 according to the present invention is formed by laminating a sheet 2 of a resin composition comprising the polyolefin, the inorganic filler, and the modified polyolefin, and a sheet 3 of the polyester resin. . What is important here is the blending ratio of the resin composition, which is 20 to 80 parts by weight, preferably 3 parts by weight of the polyolefin.
0 to 70 parts by weight, 80 to 20 parts by weight, preferably 70 to 30 parts by weight, and the modified polyolefin (
It is important to incorporate 15 to 5 parts by weight, preferably 1 to 4 parts by weight. If the blending amount of the polyolefin is less than 20 parts by weight and the blending amount of the inorganic filler exceeds 80 parts by weight, moldability will deteriorate;
If the amount of the inorganic filler blended is more than 0 parts by weight and less than 20 parts by weight, the rigidity and mechanical strength of the sheet will decrease. Furthermore, if the amount of the modified polyolefin is less than 0.5 parts by weight, the adhesion to aluminum will be poor, and if it is more than 5 parts by weight, the light transmittance will decrease slightly, No improvement effect was observed on other performances. In addition, various additives such as antistatic agents, flame retardants, antioxidants, plasticizers, etc. may be added and blended as necessary, as long as they do not impede the effects of the present invention. Various surfactants can be used as the antistatic agent. Further, as the flame retardant, for example,
Examples include inorganic antimony oxide and zircon oxide, and organic phosphate esters and tricresyl phosphate. As the antioxidant, triazole-based, salicylic acid-based, and acrylonitrile-based antioxidants are used. Further, as the plasticizer, for example, diester phthalate 2
．． ．． 2 ke/-)v 0-ke 2. ,')7jl';-
Z-2.1 is mentioned. A sheet of this resin composition can be manufactured by molding using a conventional method. The thickness of the sheet of this resin composition is usually 30 to 200 mm.
Hiro m, preferably 40 to 150 l m. If the thickness of the sheet of this resin composition is smaller than the above range, the sheet may lack stiffness and may be inconvenient to use in packaging; Increasing the size may not produce a proportional effect, and the cost may even increase. On the other hand, the polyester resin sheet has a thickness of 3
Such polyester resins, preferably 20 pm to 4 to 15 pm, are readily available commercially under trade names such as Mylar and Lumirror. Note that both the resin composition sheet and the polyester resin sheet may be unstretched or stretched. The sheet of the resin composition and the sheet of the polyester resin can be joined by known means such as heat sealing, bonding with an adhesive, extrusion lamination, and the like. The thus obtained laminate has excellent mechanical strength such as transparency and rigidity, and moisture resistance, and has a low calorie burn. Next, the package 4 according to the present invention is made by sealing the opening of the recess 5 formed in the laminate 1 with a light shielding member 6, as shown in FIG. 2, for example. The light-shielding member may be laminated and attached to either the resin composition sheet or the polyester resin sheet in the laminate, and the recess may be formed by thermoforming, for example, vacuum forming, pressure forming, etc. I can do it. It goes without saying that in this package, the light-shielding member is attached after the object to be packaged, such as a tablet, is stored in the recess. Examples of the packaged items include oral medicines, pharmaceuticals such as tablets, sachets, and injection ampoules, and other reagents. In particular, since this package uses the laminate according to the present invention, mechanical strength and rigidity are imparted to the recessed portions, so that relatively large objects such as injection ampoules and tablets in glass bottles can be packaged. Suitable for packaging and storing pharmaceutical products, etc. without fear of damage. Examples of the light-shielding material include metal foil such as aluminum foil, a synthetic resin sheet on which a metal vapor-deposited film is formed, a light-shielding synthetic resin film or paper, and metal foil on paper, a synthetic resin sheet, or a synthetic resin film. Examples include laminated sheets or films. [Effect of the invention] According to the present invention, a sheet of a resin composition containing a polyolefin, an inorganic filler that imparts transparency, and a modified polyolefin is laminated with a sheet of a polyester resin. A laminate with excellent strength, particularly rigidity, can be provided. In particular, since it has good moldability, it can be molded into a thin laminate. According to this invention, since the laminate having excellent transparency is used, it is possible to easily identify the packaged object, and the laminate has excellent adhesion to other members. As a result, a close bond between the light-shielding member and the laminate is realized, and the bonded surface between the laminate and the light-shielding member does not peel off due to a slight impact, and the packaged items are kept dry at all times without absorbing moisture. Since this laminate has excellent mechanical strength such as rigidity, the recesses formed in the laminate may be damaged due to external impact or pressure, and the packaged item may be damaged. It is possible to provide a packaging body that is free from damage. Further, the laminate is excellent in thin-wall molding and has greater mechanical strength than conventional products even though it is thin-walled, so it can also be made into a small package for storing small-sized items. Due to the good formability of this laminate, the concave portion can be easily formed at high speed, so that the object to be packaged can be stored at high speed and the sheet containing the object to be packaged and the light-shielding member can be sealed at high speed. Therefore, high-speed packaging, especially high-speed packaging of large items, can be realized. Furthermore, even if the laminate and the package are incinerated after being disposed of, the burned calories are low, so there will be no damage to the incinerator, no generation of toxic gas, or other pollution. In addition, when forming a large number of recesses in a laminate to accommodate items to be packaged and pasting a light-shielding member after storing the items, it is recommended to make perforations or cuts between adjacent recesses to ensure the desired shape. It can be secondarily separated into blocks having a number of recesses, which is advantageous in terms of manufacturing, transportation, and storage. [Example] Next, an example of the present invention will be shown. (Production example of modified polyolefin) Polypropylene [melt index (MI) 8g/1
0 minutes, density 0.91g/crrr, product name: J700G
, manufactured by Idemitsu Petrochemical Co., Ltd.] and 100 parts by weight of terminally hydroxylated 1,4-polybutadiene (number average molecular weight 30
00, Product name: PolybdR45HT, ARCOC
Hew, Div, 5 parts by weight and anhydrous maleic #
20 parts by weight, 1.72 parts by weight of dicumyl peroxide, and 600 parts by weight of xylene, and while stirring,
After the reaction was completed by heating at 0° C. for 1 hour and then at 140° C. for 3 hours, unreacted butadiene, maleic anhydride, and xylene solvent were removed according to a conventional method to obtain modified polybutadiene. (Examples 1 to 10, Comparative Examples 1 to 3) The formulations shown in Table 1 were mixed in a Banbury mixer for 11 minutes.
After kneading for 15 minutes while heating at 0 to 150°C, a sheet of the resin composition having a thickness of about 100 gm was obtained using a press molding machine. A sheet of the resin composition was layered on one side of a polyethylene terephthalate sheet having a thickness of 10 JLm, heat-pressed at 180°C, and then dried at 80'O for 15 minutes to obtain a laminate. For this laminate, light transmittance, moisture permeability, tensile modulus,
The degree of adhesion to aluminum foil, calories burned, smoke, and toxic gas generation were evaluated. The results are shown in Table 1. The laminate was processed using a plastic bag vacuum forming machine manufactured by Sanso Kogyo Co., Ltd. to a watt density of 4. A molded article having the shape shown in FIG. 2 was obtained using IW/am', heating time of 9 seconds, and vacuum time of 1 second. This molded product was laminated with aluminum foil (5 JLm) laminated with low density polyethylene having a thickness of 5 gm, and laminated and bonded by hot pressing to obtain a tablet package.

[Light transmittance]

The total light transmittance (%) was measured using a color computer HGM-20 manufactured by Suga Test Instruments.

[Moisture permeability]

Compliant with JIS Z-0208. Unit: g/go/24Hr

[Tensile modulus]

Compliant with JIS K-6734. Unit: Kg/crr+'

[Degree of adhesion with aluminum]

Aluminum foil with a thickness of 54 m (thickness: 5 gm) was added to the laminate.
laminated with low-density polyethylene)
Laminate and adhere using heat press at ℃, 100mm
After making a 100mm square piece, this square piece was heated to a humidity of 15%
It was left in an environment of 50°C for 100 hours. After standing, the state of peeling between the aluminum foil and the laminate was determined. O: No conflict abnormality. Δ...The edges were slightly peeled off. x: 1/3 or more peeled off.

[Burned calories]

Compliant with JIS K-2279.

[Smoke and gas generation situation]

Compliant with JIS K-0106. The specifications of the raw materials used are as follows.

[Polyethylene (PE)] Manufactured by Idemitsu Petrochemical Co., Ltd., 210 J (MI = 5-
8)C4+)-j. evy (PP)]
1 Manufactured by Idemitsu Petrochemical Co., Ltd., E-250G (
MI = 1.0) [Polyethylene terephthalate (PET)] Manufactured by Toshi, molecular weight 30,000 [Talc] Manufactured by Asada Seifun, particle size 5 lm

[Mica]

Manufactured by Kuraray Co., Ltd. 1 particle size 10pm

[Feldspar]

Made by Asada Seifun, particle size lO end m

[Glass Peas]

Toa glass type, grain size 50 m

[Titanium oxide]

Manufactured by Teikoku Kagaku Kogyo, particle size 0.3 m (Hereafter, margin)

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of the laminate of the invention, and FIG. 2 is a sectional view showing an example of the package of the invention. 1... Laminated body, 2... Sheet of resin composition, 3. Sheet of bone O polyester resin, 4... Packaging body, 5...
- Recessed portion, 6... light shielding member. Patent applicant: Calpuegyo Co., Ltd.

Claims (2)

[Claims] (1) Having a sheet of a resin composition and a sheet of polyester resin consisting of 20 to 80 parts by weight of polyolefin, 80 to 20 parts by weight of an inorganic filler that imparts transparency, and 0.5 to 5 parts by weight of modified polyolefin. Characteristic laminate. (2) It has a sheet of a resin composition consisting of 20 to 80 parts by weight of a polyolefin, 80 to 20 parts by weight of an inorganic filler that imparts transparency, and 0.5 to 5 parts by weight of a modified polyolefin, and a sheet of a polyester resin. The opening of the recess of the laminate in which a recess capable of accommodating the packaged object is formed,
A package using a laminate characterized by being sealed with a light-shielding member.