WO2009081462A1 - 医療容器用多層体および医療容器 - Google Patents
医療容器用多層体および医療容器 Download PDFInfo
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- WO2009081462A1 WO2009081462A1 PCT/JP2007/074554 JP2007074554W WO2009081462A1 WO 2009081462 A1 WO2009081462 A1 WO 2009081462A1 JP 2007074554 W JP2007074554 W JP 2007074554W WO 2009081462 A1 WO2009081462 A1 WO 2009081462A1
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- Prior art keywords
- layer
- medical
- medical container
- multilayer body
- container
- Prior art date
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/05—Containers specially adapted for medical or pharmaceutical purposes for collecting, storing or administering blood, plasma or medical fluids ; Infusion or perfusion containers
- A61J1/10—Bag-type containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/325—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polycycloolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/2093—Containers having several compartments for products to be mixed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/308—Heat stability
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/72—Density
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/744—Non-slip, anti-slip
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/80—Medical packaging
Definitions
- the present invention relates to a medical container multilayer body and a medical container having a chemical solution storage section formed from the medical container multilayer body.
- resin medical containers used in the medical field include ampoules, vials, syringe containers, and infusion bags made of films.
- resin polyolefins such as polyethylene and polypropylene, styrene elastomers, vinyl chloride resins, ethylene-vinyl acetate copolymers, cyclic polyolefins, and the like are used.
- polyethylene is widely used in medical containers because it is hygienic and flexible, and does not generate toxic gases when incinerated. It is also known that when polyethylene is used for the wetted part, the polyethylene in the chemical solution adsorbs a specific drug such as a fat-soluble vitamin, and the concentration of the specific drug may decrease during storage.
- a cyclic polyolefin having a high barrier property such as a reduction in the titer of the drug due to adsorption or absorption of a specific drug, excellent transparency, heat resistance, hygiene, and low water vapor permeability, Widely used as a material for medical containers.
- a medical container using a cyclic polyolefin a prefilled syringe in which a syringe container is filled with a drug in advance is in widespread use.
- Patent Document 1 discloses a medical container having a multilayer structure in which a synthetic polyolefin layer or a barrier layer is combined with a cyclic polyolefin layer made of a thermoplastic saturated norbornene-based polymer.
- Patent Document 2 is composed of a multilayer film having a surface layer, a flexible layer, a barrier layer, and a seal layer.
- a cyclic polyolefin and an ethylene- ⁇ -olefin copolymer are used for the barrier layer, and the other layers are mainly used.
- a medical container using an ethylene- ⁇ -olefin copolymer as a component is disclosed.
- Patent Document 3 discloses a laminated film in which a B layer made of linear low density polyethylene having a specific melting point and a Vicat softening point is laminated on one or both of the A layer made of a resin such as cyclic polyolefin, and the like.
- a medical container using is disclosed.
- Patent Document 4 discloses a medical treatment using a laminated film in which a base material layer containing a polyolefin resin having a specific melting point as a main component is laminated with a sealant layer containing a cyclic polyolefin resin having a specific glass transition temperature as a main component.
- a container is described.
- an ethylene- ⁇ -olefin copolymer is mixed with the cyclic polyolefin to form a barrier layer.
- the barrier property of the barrier layer is lowered, and the drug may be absorbed by the layer adjacent to the barrier layer.
- the barrier layer is made thicker in order to improve the decrease in barrier properties, there arises a problem that the flexibility is lowered accordingly.
- Patent Documents 3 and 4 are not sufficiently heat resistant, and are not satisfactory as materials for medical containers that need to be sterilized with high-pressure steam or the like.
- multilayer film disclosed by patent document 3 and 4 also had the fault that it was inferior also to blocking resistance.
- the present invention has been made in view of the above circumstances, and without using an adhesive, the innermost layer made of cyclic polyolefin adheres well to other layers, has excellent heat resistance, and is a film.
- the innermost layer made of cyclic polyolefin adheres well to other layers, has excellent heat resistance, and is a film.
- the multi-layer body for a medical container of the present invention is a multi-layer body for a medical container used for forming a medical container, and is formed so as to be adjacent to the innermost layer made of cyclic polyolefin, and the single-site catalyst. It is characterized by having at least an intermediate layer mainly composed of a linear low-density polyethylene produced by using and an outermost layer containing a high-density polyethylene.
- the cyclic polyolefin is preferably a hydrogenated product of a ring-opening polymer of a cyclic olefin monomer.
- the linear low density polyethylene preferably has a density of 0.860 g / cm 3 or more and less than 0.940 g / cm 3 .
- the density of the high density polyethylene is preferably 0.940 to 0.970 g / cm 3 . It is preferable that the outermost layer is a mixture of the high-density polyethylene and the high-pressure low-density polyethylene, or is made of only the high-density polyethylene.
- the multi-layer body for a medical container of the present invention has a total thickness of 60 to 1000 ⁇ m, and includes three layers of the innermost layer having a thickness of 5 to 100 ⁇ m, the intermediate layer, and the outermost layer having a thickness of 5 to 100 ⁇ m. Is preferred.
- the medical container according to the present invention is a medical container provided with a storage unit that stores a chemical solution, and at least the storage unit is formed of the multilayer body for the medical container. In that case, the multilayer body for medical containers may be a blow molded body. Moreover, the multilayer body for medical containers may be a film, and the housing portion may be formed by hot plate molding of the film or formed in a bag shape.
- the innermost layer made of a cyclic polyolefin adheres well to other layers, has excellent heat resistance, and in the case of a film, has good blocking resistance. It is possible to provide a medical container multilayer body and a medical container which is formed from the medical container multilayer body and has little deterioration in properties such as transparency and peel strength even when sterilized with high-pressure steam or the like.
- FIG. 1A is a plan view showing an example of a medical container of the present invention
- FIG. 2B is a cross-sectional view taken along line I-I ′ in FIG.
- A The top view which shows another example of the medical container of this invention
- B The top view which shows another example of a port part.
- It is the (A) front view and (B) side view of the film molded product used when manufacturing the medical container of FIG.
- It is a top view which shows another example of the medical container of this invention.
- It is a top view which shows the multi-chamber medical container which is an example of the medical container of this invention. It is a top view explaining the manufacturing method of the sample used for (A) schematic diagram explaining the peeling test of an Example, and (B) (A).
- the multi-layer body for medical containers according to the present invention is a multi-layer body for medical containers which is used for forming medical containers, and particularly suitable for forming a container for storing a chemical solution among medical containers, and is made of a cyclic polyolefin.
- FIG. 1 shows a multilayer body for medical containers (hereinafter referred to as a multilayer body) 10 as an example of the present invention.
- the multilayer body 10 of this example includes an innermost layer 11 made of a cyclic polyolefin, an intermediate layer 12 mainly composed of a linear low-density polyethylene produced using a single-site catalyst, and a high-density polyethylene.
- the outermost layer 13 is composed of three layers sequentially laminated, and is formed on a film by an air-cooled or water-cooled multilayer inflation molding method, a multilayer T-die molding method, or the like.
- the film and the sheet are collectively referred to as a film.
- the innermost layer 11 is an inner layer when a medical container is formed from the multilayer body 10 and is in direct contact with a chemical solution or the like stored in the medical container, and is formed from a cyclic polyolefin. Since cyclic polyolefin has little drug adsorption and absorption, it is possible to suppress a decrease in the potency of the drug solution to be accommodated by forming a medical container with the multilayer body 10 having the layer made of cyclic polyolefin as the innermost layer 11. Further, the cyclic polyolefin is suitable as the innermost layer 11 from the viewpoint of having a high barrier property such as low water vapor transmission rate, extremely little impurity elution, and excellent hygiene. Furthermore, since the cyclic polyolefin has heat resistance and transparency, it needs to be sterilized with high-pressure steam or the like, and is suitable for use in a medical container where the contents are desired to be visible from the outside.
- Cyclic polyolefins include ring-opening polymers of cyclic olefin monomers, hydrogenated products of the ring-opening polymers, addition polymers of cyclic olefin monomers, and addition copolymerization with other monomers copolymerizable with cyclic olefin monomers. Examples include coalescence. Among these, from the viewpoint of heat resistance, mechanical strength, etc., a hydrogenated product of a ring-opening polymer of a cyclic olefin monomer is preferable. Moreover, since a low adsorptive polymer is obtained, the cyclic olefin monomer which consists only of hydrocarbons is preferable.
- the norbornene-based monomer is a monomer having a unit derived from a norbornene structure in the monomer structure, and specifically includes, for example, bicyclo [2.2.1] hept-2-ene (common name norbornene), tricyclo [4.
- cyclic olefin monomers can be used alone or in combination of two or more.
- the ring-opening polymer of a cyclic olefin monomer is obtained by polymerizing a cyclic olefin monomer by a metathesis reaction in the presence of a known ring-opening polymerization catalyst.
- the hydrogenated product of the ring-opened polymer of the cyclic olefin monomer is obtained by hydrogenating the ring-opened polymer with a known hydrogenation catalyst.
- Examples of other monomers that can be addition copolymerized with cyclic olefin monomers include ⁇ -olefins having 2 to 20 carbon atoms such as ethylene, propylene, 1-butene, and 1-hexene. These ⁇ -olefins can be used alone or in combination of two or more.
- the addition (co) polymer of the cyclic olefin monomer can be obtained by polymerization using a known catalyst comprising a titanium, zirconium compound and an organoaluminum compound.
- examples of addition (co) polymers of cyclic olefin monomers include Apel (registered trademark) manufactured by Mitsui Chemicals, Inc., TOPAS (registered trademark) manufactured by TICONA, and the like.
- examples of the hydrogenated product of the ring-opening polymer include ZEONOR (registered trademark) and ZEONEX (registered trademark) manufactured by Nippon Zeon Co., Ltd.
- the glass transition temperature (hereinafter sometimes referred to as Tg) is preferably 70 ° C. to 180 ° C., more preferably 100 ° C. to 140 ° C.
- Tg glass transition temperature
- Tg exceeds 140 ° C., the moldability and heat sealability of the multilayer body may be reduced.
- the glass transition temperature is a value measured by a differential scanning calorimeter (hereinafter referred to as DSC) in accordance with JIS K 7121, and is a value described in a manufacturer's catalog and technical data. .
- the Tg of the cyclic polyolefin can be arbitrarily adjusted by a method of mixing a plurality of types of cyclic polyolefins having good compatibility at an appropriate ratio.
- the degree of compatibility of the mixture of cyclic polyolefins can be determined by measuring the Tg of the mixture by DSC. In the case of a mixture with good compatibility, only one Tg is observed, whereas when the compatibility is not good, a plurality of Tg is observed. It is preferable that the mixture has good compatibility because both heat resistance that can withstand the target high-pressure steam sterilization temperature and moldability can be achieved.
- the innermost layer 11 is made of a cyclic polyolefin, as long as the effects of the present invention are not impaired, for example, an antistatic agent, an antioxidant, a lubricant, an antifogging agent, an ultraviolet absorber, a neutralizing agent, etc.
- an antistatic agent for example, an antioxidant, a lubricant, an antifogging agent, an ultraviolet absorber, a neutralizing agent, etc.
- Various additives generally used in the field may be contained in a normal use range.
- the intermediate layer 12 is a layer formed so as to be adjacent to the innermost layer 11 described above, and is manufactured using a single-site catalyst typified by a metallocene catalyst, and has a density of 0.860 g / cm 3 or more and 0.
- the main component is a linear low density polyethylene (hereinafter sometimes referred to as LLDPE) of less than 940 g / cm 3 .
- LLDPE linear low density polyethylene
- a main component means that content is 50 mass% or more here.
- Such LLDPE produced using a single-site catalyst has excellent adhesion to cyclic polyolefins, and has little decrease in adhesion even when exposed to high temperature and high humidity conditions by high-pressure steam sterilization.
- the intermediate layer 12 mainly composed of LLDPE adjacent to the innermost layer 11 made of cyclic polyolefin another layer can be adhered favorably and stably via the intermediate layer 12. be able to.
- LLDPE produced using a single site catalyst is excellent in transparency, and its deterioration is small even when exposed to high temperature and high humidity conditions. From these points, the multilayer body 10 including the intermediate layer 12 is suitable for forming a medical container that needs to be sterilized by high-pressure steam.
- the LLDPE can be suitably used as long as it is less than the single site catalyst density were prepared using 0.860 g / cm 3 or more 0.940 g / cm 3, Of these density 0.900
- a material having a viscosity of ⁇ 0.917 g / cm 3 is used, a multilayer body 10 and a medical container with better heat resistance can be obtained, and even when sterilized by high-pressure steam at 121 ° C., no problem occurs, and the multilayer body 10
- the decrease in peel strength between the intermediate layer 12 and the innermost layer 11 after sterilizing the medical container formed from high-pressure steam is suppressed.
- the density of LLDPE is less than 0.860 g / cm 3 , heat resistance may be reduced.
- the density of LLDPE is 0.940 g / cm 3 or more, the transparency and impact resistance of the container may decrease. Further, as the LLDPE produced using a single site catalyst, a plurality of types having different densities may be used in combination.
- LLDPEs produced with a single-site catalyst those having a wide composition distribution of ethylene and ⁇ -olefin as measured by composition analysis are preferable because of excellent workability and impact resistance.
- examples of commercially available products having such characteristics include Harmolex (registered trademark) manufactured by Nippon Polyethylene Co., Ltd., Umerit (registered trademark) manufactured by Ube Industries, Ltd., and Evolution (registered trademark) manufactured by Prime Polymer Co., Ltd. It can be used suitably.
- the intermediate layer 12 contains LLDPE produced by a single site catalyst as a main component, that is, 50% by mass or more, and preferably 65% by mass or more, more preferably 80% by mass or more from the viewpoint of flexibility.
- Other polyethylenes and cyclic polyolefins may be included as long as the adhesiveness with the innermost layer 11 is not impaired.
- high-density polyethylene having a higher density than LLDPE produced by a single-site catalyst is used in an amount of preferably 30% by mass or less, more preferably 25% by mass or less, heat resistance is improved, and high-pressure steam sterilization is performed. A decrease in the adhesiveness of the intermediate layer 12 is further suppressed.
- other polyethylene or cyclic polyolefin is used in combination with LLDPE as described above, there is an advantage that the multilayer body 10 having an excellent appearance can be easily obtained.
- the intermediate layer 12 is also variously used in the field of resins, such as an antistatic agent, an antioxidant, a lubricant, an antifogging agent, an ultraviolet absorber and a neutralizing agent, as long as the effects of the present invention are not impaired. You may contain the additive in the normal use range.
- the outermost layer 13 is the outermost layer when a medical container is formed from the multilayer body 10, and is formed containing high-density polyethylene (hereinafter sometimes referred to as HDPE).
- HDPE high-density polyethylene
- the heat resistance of the resulting multilayer body 10 is improved, and a medical container with less characteristic deterioration such as deformation of the surface of the medical container is formed by sterilization with high-pressure steam. Can do.
- the film-like multilayer body 10 as in the example of FIG. 1 is often wound and rolled to be stored or handled, but a layer containing HDPE is provided in the outermost layer 13.
- the blocking resistance of the multilayer body 10 is also excellent.
- HDPE high density polyethylene
- the density is 0.940 to 0.970 g / cm 3 , but among these, if the density is 0.945 to 0.970 g / cm 3 , The multilayer body 10 excellent in heat resistance and blocking resistance is obtained. Moreover, you may use together multiple types of HDPE from which density differs.
- the preferred content of HDPE in the outermost layer 13 varies depending on the density of HDPE. For example, in the case of HDPE having a density of 0.945 to 0.970 g / cm 3 , the content is 20% by mass or more in the outermost layer 13. If present, a sufficiently heat-resistant medical container with little deterioration in characteristics can be formed by sterilization with high-pressure steam at 121 ° C. However, in order to develop more stable heat resistance and blocking resistance, the content of HDPE in the outermost layer 13 is preferably 30% by mass or more, more preferably 70% by mass or more, and further preferably 100% by mass. is there.
- the high-pressure low-density polyethylene preferably has a density of 0.910 to 0.935 g / cm 3 , more preferably 0.920 to 0.935 g / cm 3 .
- the outermost layer 13 also has various additions commonly used in the resin field, such as an antistatic agent, an antioxidant, a lubricant, an antifogging agent, an ultraviolet absorber, and a neutralizing agent, as long as the effects of the present invention are not impaired.
- An agent may be contained within a normal use range.
- the outermost layer 13 may be one that has been subjected to modification such as crosslinking with an electron beam to improve heat resistance.
- the total thickness of the multilayer body 10 is not particularly limited, but is usually 60 to 1000 ⁇ m, and is preferably 100 to 600 ⁇ m, more preferably 100 to 400 ⁇ m in consideration of flexibility and strength of the multilayer body 10.
- the thickness of each layer is not particularly limited, but the innermost layer 11 is preferably 5 to 100 ⁇ m and the outermost layer 13 is preferably 5 to 100 ⁇ m. If the thickness of the innermost layer 11 is less than 5 ⁇ m, it may be easy to adsorb the medicine to be accommodated, and if it exceeds 100 ⁇ m, the flexibility of the multilayer body 10 and the heat sealability when forming a medical container from the multilayer body 10 May decrease.
- the thickness of the outermost layer 13 is less than 5 ⁇ m, the heat resistance of the multilayer body 10 may be reduced, and if it exceeds 100 ⁇ m, the transparency may be reduced. Therefore, in the case of the multi-layer body 10 composed of three layers, it is preferable that the total thickness is 60 to 1000 ⁇ m, the innermost layer 11 is 5 to 100 ⁇ m, the outermost layer is 5 to 100 ⁇ m, and the rest is the intermediate layer 12. In the case where the multilayer body 10 having three layers is a film, the innermost layer 11 is preferably 5 to 100 ⁇ m, the intermediate layer 12 is preferably 50 to 300 ⁇ m, and the outermost layer is preferably 5 to 100 ⁇ m.
- the multilayer body 10 in FIG. 1 is composed of three layers in which the innermost layer 11 made of cyclic polyolefin and the outermost layer 13 containing HDPE are well bonded via the intermediate layer 12, although provided with sufficient characteristics as the multilayer body 10 for medical containers, for the purpose of further imparting other characteristics, one or more other layers are provided between the intermediate layer 12 and the outermost layer 13, It is good also as four or more layers.
- layers include gas barrier resin layers such as ethylene-vinyl alcohol copolymers, adhesive resin layers such as ethylene-vinyl acetate copolymers, ultraviolet shielding layers such as polyolefin resins containing iron oxide, and xylylene range.
- examples thereof include an oxygen absorbing layer composed of a polyamide resin such as MXD nylon obtained from an amine and an ⁇ , ⁇ -linear aliphatic dibasic acid such as adipic acid and a cobalt salt.
- multilayer body not only the multilayer body 10 formed in a film as shown in FIG. 1, but also a blow molded body molded by a multilayer blow molding method (multilayer hollow molding method) as will be described in detail later.
- a three-dimensional multilayer body may be used.
- the medical container of this invention is a medical container provided with the accommodating part which accommodates a chemical
- the medical container is usually provided with a port portion serving as a drug solution inlet in addition to the accommodating portion.
- a port portion serving as a drug solution inlet in addition to the accommodating portion.
- FIG. 2 shows a medical container 20 in which a housing portion 21 and a port portion 22 are integrally formed by a multilayer blow molding method.
- the upper part of the medical container 20 is a suspending part 23 in which a suspending hole is formed, and the lower port part 22 is connected to the innermost layer 11 and the outer peripheral part of a cylindrical rubber material through which an injection needle can be inserted.
- a rubber plug 22a provided with a weldable synthetic resin by an injection molding method is attached to be sealed.
- the medical container 20 can be manufactured by a normal multilayer blow molding method using a multilayer blow molding machine. That is, after extruding a multilayer parison and sandwiching the multilayer parison with a mold, clean air may be blown into the multilayer parison.
- the medical container 20 of FIG. 2 made of a hollow blow-molded body can be formed.
- the mold is pre-blowed with clean air in advance, and after closing the mold, the mold is made negative pressure through a vacuum hole formed in the mold. Transfer accuracy can be improved.
- the port portion in addition to the method of integrally forming with the housing portion by the multilayer blow molding method, for example, as shown in the example of FIG.
- Examples thereof include a method of heat sealing and a method of integrating at the same time as molding by insert blow molding with a cylindrical member inserted.
- the rubber plug 22a is attached to the cylindrical member for sealing, and the details will be described later with reference to FIG.
- the lid member and the cylindrical member may be sealed by a method of welding the ultrasonic wave or the like so that the peripheral portion of the rubber stopper is further suppressed by a ring-shaped lid member.
- FIG. 3 (A) shows a medical container 30 including a housing portion 31 formed by hot plate molding of a film and a port portion 32 that is made of a cylindrical member and can be sealed by heat sealing a rubber plug 32a. Is shown.
- the container 31 of the medical container 30 is formed by stacking two film molded articles 10 ′ shown in FIG. 4 and heat-sealing the peripheral edge 33. That is, when this medical container 30 is manufactured, first, along the inner shape of the accommodating portion 31 at the center of the film-like multilayer body 10 as shown in FIG. 1 by hot plate forming such as vacuum forming or pressure forming. A concave portion is formed to obtain a film molded product 10 ′ as shown in FIG.
- the peripheral part of two film molded product 10 ′ is heat-sealed, arrange
- the heat sealing temperature is not particularly limited because it depends on the total thickness of the multilayer body 10, but is preferably about 150 to 280 ° C. Moreover, you may trim a peripheral part after heat sealing as needed.
- the medical container 30 shown in FIG. 3A can be manufactured by simultaneously forming the housing portion 31 and forming the port portion 32 by heat sealing the cylindrical member. The formation of the accommodating portion 31 and the formation of the port portion 32 may be performed in separate steps.
- the same cyclic polyolefin as the innermost layer 11 of the multilayer body 10 is preferable because the heat sealability with the accommodating portion 31 is good.
- it is not limited to cyclic polyolefin, LLDPE manufactured with a single-site catalyst, the same composition as the intermediate layer 12, and the like can also be used.
- the multilayer thing which used resin which can be heat-sealed for the heat-seal surface of a cylinder member may be used.
- the ring-shaped lid member 32c is used instead of forming the port portion 32 from the cylindrical member and the rubber plug 32a, as shown in FIG. 3B, after the rubber plug 32b is loaded into the cylindrical member.
- the ring-shaped lid member 32c is used instead of forming the port portion 32 from the cylindrical member and the rubber plug 32a, as shown in FIG. 3B, after the rubber plug 32b is loaded into the cylindrical member.
- the ring-shaped lid member 32c is used instead of forming the port portion 32 from the cylindrical member and the rubber plug 32
- FIG. 5 shows a so-called film bag type medical container 40 provided with a housing part 41 in which the film-like multilayer body 10 as shown in FIG. 1 is formed in a bag shape and a port part 42 made of a cylindrical member.
- the medical container 40 of this example uses a multilayer body formed in a cylindrical shape by a multilayer inflation method or the like, heat seals both end portions thereof to form a housing portion 41, and a cylindrical member at a predetermined position on one end thereof Can be manufactured by a method of forming a suspended portion at the other end.
- the heat sealing of both end portions and the heat sealing of the cylindrical member may be performed simultaneously or in separate steps.
- the multilayered body 10 as shown in FIG.
- the housing part may be formed by heat sealing the peripheral part.
- the port portion 42 includes a cylindrical member made of cyclic polyolefin or LLDPE manufactured by a single site catalyst, a rubber plug 42a through which an injection needle can be inserted, and a peripheral portion of the rubber plug 42a. It is closed by a ring-shaped lid member 42b for pressing.
- At least the housing part is an innermost layer made of cyclic polyolefin, an intermediate layer mainly composed of linear low-density polyethylene manufactured using a single-site catalyst, and a high density Since it is formed from a multilayer body with an outermost layer containing polyethylene, each layer is well bonded, hygienic, and also has excellent heat resistance and is transparent when autoclaved There is little deterioration in properties such as peel strength.
- a medical container it is not limited to the form provided with one accommodating part, for example, as shown in FIG. 6, the accommodating part 51 is divided into a plurality by a partition wall seal part 52 that can communicate, The multi-chamber medical container 50 which can store a chemical
- the multi-chamber medical container 50 of FIG. 6 is provided with a partition seal portion 52 along the width direction of the storage portion 51 formed in a bag shape, and the storage portion 51 is connected to the first storage portion 51a and the second storage portion 51b. It has been divided.
- the partition wall seal portion 52 is peeled off when the user presses the first housing portion 51a or the second housing portion 51b from the outside, and the second liquid medicine and the second medical solution in the first housing portion 51a.
- the chemical solution in the container 51b is mixed.
- sticker part 52 There is no restriction
- heat sealing is implemented at the time of formation of the accommodating part 51, you may heat-seal and form simultaneously with it. In addition to heat sealing, a known sealing method such as impulse sealing may be performed separately.
- a mechanism for forming the partition seal portion 52 is provided in a mold used at the time of blow molding so that the partition seal portion 52 can be formed simultaneously with blow molding. May be.
- the medical container of the present invention may be provided with a light-shielding layer on the outside thereof, particularly on the outside of the housing portion, for protecting the drug solution as necessary.
- suitable materials for the light shielding layer include metal foils such as aluminum foil, aluminum vapor deposition films, laminate films of metal foils and synthetic resin films, and synthetic resin films containing pigments.
- metal foils such as aluminum foil, aluminum vapor deposition films, laminate films of metal foils and synthetic resin films, and synthetic resin films containing pigments.
- aluminum foil and aluminum vapor-deposited film have not only light-shielding properties, but also moisture-proof, oil-resistant, non-water-absorbing properties, etc., and improve the long-term storage stability of chemicals stored in medical containers. It is preferable from the point.
- such a light shielding layer may be provided so as to be peelable from the medical container so that the medical solution can be visually observed from the outside when the medical container is used.
- medical solution was demonstrated as an example as a chemical
- the chemical solution include, but are not limited to, chemical solutions used as injections such as physiological saline, circulatory system drugs, contrast agents, and antibacterial agents.
- Example 1 The medical container 20 of FIG. 2 filled with 100 ml of water was manufactured as follows. First, a blow molded article having a three-layer structure in which an innermost layer having a thickness of 30 ⁇ m, an intermediate layer having a thickness of 250 ⁇ m, and an outermost layer having a thickness of 20 ⁇ m are sequentially laminated by a multilayer blow molding method using a multilayer blow molding machine. The accommodating part 21 and the port part 22 were integrally molded.
- the rubber plug 22a has a melt flow rate at 280 ° C. (hereinafter referred to as “MFR”) in accordance with ISO 1133 on the outer periphery of the rubber plug, and the load during MFR measurement in the examples and comparative examples is 21.18 N.
- MFR melt flow rate at 280 ° C.
- the innermost layer is a cyclic polyolefin “ZEONOR 1020R (manufactured by Zeon Corporation)” (hereinafter referred to as “Zeon Corporation”) having an MFR of 20 g / 10 minutes at 280 ° C. and a glass transition temperature of 102 ° C. in accordance with COP1 and ISO 1133. "COP2") in a 1: 1 mass ratio was used. Only one Tg of this mixed cyclic polyolefin was observed and was 119 ° C.
- the intermediate layer is an LLDPE manufactured with a single site catalyst (hereinafter sometimes referred to as a single site LLDPE), and has an MFR at 190 ° C.
- HDPE “NOVATEC (manufactured by Nippon Polyethylene Co., Ltd.)” having an MFR at 190 ° C. of 3.5 g / 10 min and a density of 0.955 g / cm 3 was used.
- the medical container 20 of FIG. 2 filled with water thus obtained was subjected to high-pressure steam sterilization at 121 ° C. for 30 minutes by spray-type high-pressure steam sterilization, and the characteristics before and after the evaluation were evaluated as follows. The evaluation results are shown in the table. In Examples and Comparative Examples, blocking resistance and molding stability are evaluated only in the case of forming from a film and forming a housing portion, and forming the housing portion from multilayer blow molding as in Example 1. If you do not go.
- the T-shaped peel strength according to K6854-3 was measured at a tensile speed of 300 mm / min. The test was conducted with a tensile tester. Reference symbol P in the figure indicates a chuck of a tensile tester.
- FIG. 7A in order to bring the sample S into a state in which only the innermost layer 11 is broken at the broken portion V, first, as shown in the plan view of FIG. Cuts C are made at two positions facing each other at both ends in the width direction of the sample S cut out from, and the sample S is pulled in the length direction as indicated by arrows in FIG. 7B. Then, only the innermost layer 11 is completely broken at the notch C, and the other layers are not broken.
- Example 2 A medical container 20 was obtained in the same manner as in Example 1 except that the composition of the outermost layer and the configuration of the port portion 22 were changed.
- the outermost layer includes a high pressure method low density polyethylene “NOVATEC (manufactured by Nippon Polyethylene Co., Ltd.)” having an MFR at 190 ° C. of 1.1 g / 10 min and a density of 0.927 g / cm 3 , and an MFR at 190 ° C.
- NOVATEC manufactured by Nippon Polyethylene Co., Ltd.
- the port portion 22 is a cylindrical member made of cyclic polyolefin manufactured by injection molding, heated with a preheating mold set at 250 ° C., and then inserted into the port portion 22 side of the accommodating portion 21 made of the blow molded body of FIG. It was configured by heat sealing at 220 ° C. and mounting.
- the rubber plug was loaded into the cylindrical member, and then the ring-shaped lid member was placed so as to press the peripheral edge of the rubber plug, and the cylindrical member and the lid member were ultrasonically welded. .
- COP1 was used for the cylinder member and the lid member. Evaluation was performed in the same manner as in Example 1. The results are shown in the table.
- Example 3 A medical container 20 was obtained and evaluated in the same manner as in Example 1 except that only COP2 was used for forming the innermost layer. The results are shown in the table.
- the rubber plug 22a is provided with a layer made of LLDPE used as an intermediate layer on the outer periphery of the rubber plug by an injection molding method.
- Example 4 In addition to the formation of the intermediate layer, only a single-site LLDPE “Harmolex (manufactured by Nippon Polyethylene Co., Ltd.)” having an MFR at 190 ° C. of 3.5 g / 10 min and a density of 0.918 g / cm 3 was used. Obtained the medical container 20 like Example 3, and evaluated it similarly. The results are shown in the table.
- the rubber plug 22a is formed by providing an LLDPE layer used as an intermediate layer on the outer periphery of the rubber plug by an injection molding method.
- Example 5 The intermediate layer was formed except that only a single-site LLDPE “Umerit” (manufactured by Ube Industries) with an MFR at 190 ° C. of 4.0 g / 10 min and a density of 0.931 g / cm 3 was used.
- a medical container 20 was obtained and evaluated in the same manner. The results are shown in the table.
- the rubber plug 22a is formed by providing an LLDPE layer used as an intermediate layer on the outer periphery of the rubber plug by an injection molding method.
- Example 6 For the formation of the intermediate layer, a single-site LLDPE “Umerit 0520F (manufactured by Ube Industries)” having an MFR at 190 ° C. of 2.0 g / 10 min and a density of 0.904 g / cm 3 and an MFR at 190 ° C. Same as Example 1 except that HDPE “Novatec (manufactured by Nippon Polyethylene Co., Ltd.)” having a density of 0.956 g / cm 3 at 3.5 g / 10 minutes was blended at a mass ratio of 8: 2. A medical container 20 was obtained and evaluated in the same manner. The results are shown in the table. In the present embodiment, a rubber plug 22a having a COP1 layer provided on the outer periphery of the rubber plug by an injection molding method was used.
- Example 7 The medical container 30 of FIG. 3 filled with 100 ml of water was manufactured as follows. First, by a multilayer inflation method using a multilayer inflation film molding machine, an inflation film composed of three layers in which an innermost layer having a thickness of 10 ⁇ m, an intermediate layer having a thickness of 220 ⁇ m, and an outermost layer having a thickness of 20 ⁇ m were sequentially laminated was manufactured. . Next, the film piece obtained by cutting the blown film was softened by radiant heating with a heater set at 300 ° C., and molded with a vacuum molding machine using a normal temperature mold, and the film molded product 10 ′ of FIG. Got.
- Example 2 In addition, the same resin as Example 1 was used for the innermost layer, the intermediate layer, and the outermost layer. Then, the sealed medical container 30 was evaluated. The results are shown in the table.
- Example 8 The medical container 40 of FIG. 5 filled with 100 ml of water was manufactured as follows. First, an inflation film having a three-layer structure was produced in the same manner as in Example 7. Next, both ends of this inflation film are heat-sealed to form a bag, and a cylindrical member, which is an injection-molded product of COP2, is heat-sealed at one end to form a port portion 42 in the film bag-type container 41. did.
- the rubber plug 42a is loaded into the cylindrical member, and then the ring-shaped lid member 42b is arranged so as to press the peripheral part of the rubber plug 42a,
- the cylinder member and the lid member 42b were ultrasonically welded.
- COP1 was used for the cylinder member and the cover member 42b. Then, the sealed medical container 40 was evaluated. The results are shown in the table.
- Example 9 In the outermost layer, a high-pressure low-density polyethylene “Novatech (manufactured by Nippon Polyethylene Co., Ltd.)” having an MFR at 190 ° C. of 1.1 g / 10 min and a density of 0.927 g / cm 3 , and an MFR at 190 ° C. of 3.
- a blend of high density polyethylene “Novatec (manufactured by Nippon Polyethylene Co., Ltd.)” having a density of 0.956 g / cm 3 at 5 g / 10 minutes and a mass ratio of 7: 3 was used.
- a medical container 20 was obtained and evaluated in the same manner. The results are shown in the table.
- Example 10 A linear low density polyethylene “NOVATEC (manufactured by Nippon Polyethylene Co., Ltd.)” produced using a Ziegler catalyst having an MFR at 190 ° C. of 2.0 g / 10 min and a density of 0.936 g / cm 3 at the outermost layer. And a high-density polyethylene “NOVATEC (manufactured by Nippon Polyethylene Co., Ltd.)” having a MFR at 190 ° C. of 3.5 g / 10 min and a density of 0.956 g / cm 3 , blended at a mass ratio of 7: 3. Except that, the medical container 20 was obtained in the same manner as in Example 8 and evaluated in the same manner. The results are shown in the table.
- Example 1 As a main component of the intermediate layer, a Ziegler catalyst having an MFR at 190 ° C. of 1.1 g / 10 minutes and a density of 0.906 g / cm 3 was used instead of the single-site LLDPE.
- the medical container was molded and evaluated in the same manner as in Example 1 except that LLDPE (manufactured by Nippon Polyethylene Co., Ltd.) was used. The evaluation results are shown in the table.
- Example 3 The medical container was molded and evaluated in the same manner as in Example 1 except that the outermost layer was not formed and a two-layer structure of the innermost layer and the intermediate layer was used. The evaluation results are shown in the table.
- Examples 1 to 3 and 6 to 10 in which single-site LLDPE is used as the main component of the intermediate layer and HDPE is used in combination reduction in peel strength and transparency due to high-pressure steam sterilization is suppressed, and heat resistance is also improved.
- An excellent medical container was obtained.
- the medical container obtained in Comparative Example 1 in which Ziegler-based LLDPE was used in combination with HDPE had a great decrease in peel strength and transparency due to high-pressure steam sterilization.
- Examples 4 and 5 using only single-site LLDPE for the intermediate layer were compared with Comparative Example 2 using only Ziegler LLDPE.
- Comparative Example 3 In Comparative Example 3 in which the outermost layer was not provided, the transparency was greatly reduced by high-pressure steam sterilization, and the heat resistance was also poor. In Comparative Examples 4 and 5 in which the outermost layer did not contain HDPE, the same tendency as in Comparative Example 3 was observed. In Examples 9 and 10 in which high-pressure low-density polyethylene was used in combination with HDPE as a component of the outermost layer, molding stability was superior to Examples 7 and 8 in which the outermost layer was only HDPE. Furthermore, in Example 8, the blocking resistance of the film was good, but in Comparative Example 5, it was poor.
- the innermost layer made of a cyclic polyolefin adheres well to other layers, has excellent heat resistance, and in the case of a film, has good blocking resistance. It is possible to provide a medical container multilayer body and a medical container which is formed from the medical container multilayer body and has little deterioration in properties such as transparency and peel strength even when sterilized with high-pressure steam or the like. Therefore, the present invention is industrially useful.
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Abstract
Description
これらの樹脂のうちポリエチレンは、衛生性が高く柔軟であり、焼却処分される際に有毒なガスを発生しないことなどから医療容器に多用されているが、その一方で、医療容器における薬液との接液部にポリエチレンを使用すると、薬液中のポリエチレンが脂溶性ビタミンなどの特定の薬剤を吸着してしまい、保存中にその特定の薬剤の濃度が低下する場合があることも知られている。
特許文献2には、表層、柔軟層、バリア層、シール層を備えた多層フィルムからなり、バリア層には環状ポリオレフィンとエチレン-α-オレフィン共重合体とが使用され、その他の層には主成分としてエチレン-α-オレフィン共重合体が使用された医療容器が開示されている。
特許文献3には、環状ポリオレフィンなどの樹脂からなるA層の片方または両方に、特定の融点とビカット軟化点を備えた直鎖状低密度ポリエチレンからなるB層が積層された積層フィルムと、これを使用した医療容器が開示されている。
さらに特許文献4には、特定の融点のポリオレフィン系樹脂を主成分として含む基材層に、特定のガラス転移温度の環状ポリオレフィン系樹脂を主成分として含むシーラント層が積層した積層フィルムを用いた医療容器が記載されている。
前記環状ポリオレフィンは、環状オレフィンモノマーの開環重合体の水素添加物であることが好ましい。
前記直鎖状低密度ポリエチレンの密度は、0.860g/cm3以上0.940g/cm3未満であることが好ましい。
前記高密度ポリエチレンの密度は、0.940~0.970g/cm3であることが好ましい。
前記最外層は、前記高密度ポリエチレンと高圧法低密度ポリエチレンとの混合物であるか、前記高密度ポリエチレンのみからなることが好ましい。
本発明の医用容器用多層体は、総厚みが60~1000μmであって、厚みが5~100μmの前記最内層と、前記中間層と、厚みが5~100μmの前記最外層との3層からなるものが好適である。
本発明の医療容器は、薬液を収容する収容部を備えた医療容器であって、少なくとも前記収容部は、前記医療容器用多層体からなることを特徴とする。
その場合、前記医療容器用多層体はブロー成形体であってもよい。また、前記医療容器用多層体がフィルムであり、前記収容部は、前記フィルムが熱板成形されたものであってもよいし、袋状に形成されたものであってもよい。
11 最内層
12 中間層
13 最外層
20、30、40 医療容器
50 複室医療容器
本発明の医療容器用多層体は、医療容器の形成に使用され、特に医療容器のうち薬液を収容する収容部の形成に好適に使用される医療容器用多層体であって、環状ポリオレフィンからなる最内層と、この最内層に隣接するように形成され、シングルサイト系触媒を使用して製造された直鎖状低密度ポリエチレンを主成分とする中間層と、高密度ポリエチレンを含有する最外層とを少なくとも有するものである。
この例の多層体10は、環状ポリオレフィンからなる最内層11と、シングルサイト系触媒を使用して製造された直鎖状低密度ポリエチレンを主成分とする中間層12と、高密度ポリエチレンを含有する最外層13とが順次積層した3層からなり、空冷または水冷の多層インフレーション成形法、多層T-ダイ成形法などにより、フィルムに形成されたものである。なお、本発明では、フィルムおよびシートのことをまとめてフィルムという。
環状ポリオレフィンは、薬剤の吸着や吸収が少ないため、環状ポリオレフィンからなる層を最内層11とした多層体10で医療容器を形成することにより、収容する薬液の力価低下を抑制することができる。また、環状ポリオレフィンは水蒸気透過率が低いなどの高いバリア性を有しているとともに、不純物の溶出が極めて少なく、衛生性に優れる点からも、最内層11として好適である。さらに、環状ポリオレフィンは、耐熱性や透明性を有しているため、高圧蒸気などで滅菌される必要があり、内容物を外側から目視できることが望まれる医療容器への使用にも適している。
環状オレフィンモノマーとしては、特に限定されるものではないが、ノルボルネン系モノマー及び単環式環状オレフィンモノマーなどが挙げられる。ノルボルネン系モノマーは、モノマー構造中にノルボルネン構造に由来する単位を有するモノマーであり、具体的には例えば、ビシクロ〔2.2.1〕ヘプト-2-エン(慣用名ノルボルネン)、トリシクロ〔4.3.0.12,5〕デカ-3,7-ジエン(慣用名ジシクロペンタジエン)、7,8-ベンゾトリシクロ〔4.3.0.12,5〕デカ-3-エン(慣用名メタノテトラヒドロフルオレン)及びテトラシクロ〔4.4.0.12,5.17,10〕ドデカ-3-エン(慣用名:テトラシクロドデセン)などが挙げられる。また、これらノルボルネン系モノマーは炭素数1~3の炭化水素基を有していてもよい。単環式環状オレフィンモノマーとしては、具体的に、シクロヘキセン、シクロヘプテン及びシクロオクテンなどが挙げられる。これら環状オレフィンモノマーは、単独でまたは2種以上を用いることができる。
環状オレフィンモノマーの開環重合体は、環状オレフィンモノマーを、公知の開環重合触媒の存在下でメタセシス反応により重合して得られるものである。また、環状オレフィンモノマーの開環重合体の水素添加物は、開環重合体を公知の水素化触媒により水素化することにより得られるものである。
また、環状オレフィンモノマーと付加共重合可能なその他のモノマーとしては、例えば、エチレン、プロピレン、1-ブテン、1-ヘキセンなどの炭素数2~20のα-オレフィンが挙げられる。これらα-オレフィンは1種または2種以上使用することができる。環状オレフィンモノマーの付加(共)重合体は、公知のチタン、ジルコニウム化合物と有機アルミニウム化合物とからなる触媒を用いて重合することにより得ることが出来る。
環状ポリオレフィンのTgは、複数種の環状ポリオレフィンうち、相溶性のよいものを適当な比率で混合する方法などで任意に調整できる。環状ポリオレフィンの混合物の相溶性の程度は、DSCにより混合物のTgを測定することにより知ることができる。相溶性が良い混合物の場合、1つのTgだけが観測されるのに対して、相溶性が良いと言えない場合には複数のTgが観測される。相溶性が良い混合物であると、目的とする高圧蒸気滅菌温度に耐える耐熱性と、成形性の両立をはかることができるため好ましい。
シングルサイト系触媒を使用して製造されたこのようなLLDPEは、環状ポリオレフィンとの接着性が優れているとともに、高圧蒸気滅菌により高温高湿条件に晒された場合でも接着性の低下が少ない。よって、環状ポリオレフィンからなる最内層11に、このようなLLDPEを主成分とした中間層12を隣接して設けることにより、この中間層12を介して、さらに他の層を良好かつ安定に接着させることができる。また、シングルサイト系触媒を使用して製造されたLLDPEは透明性にも優れ、高温高湿条件に晒された場合でもその劣化が少ない。これらの点から、このような中間層12を備えた多層体10は、高圧蒸気により滅菌される必要のある医療容器の形成に好適である。
また、シングルサイト系触媒を使用して製造されたLLDPEとして、密度などの異なる複数種のものを併用してもよい。
HDPEを含有する層を最外層13に設けることにより、得られる多層体10の耐熱性が向上し、高圧蒸気での滅菌によって医療容器の表面の変形などの特性劣化の少ない医療容器を形成することができる。また、図1の例のようなフィルム状の多層体10は、巻き回されてロール状とされて保管されたり取り扱われたりする場合が多いが、HDPEを含有する層を最外層13に備えることで、多層体10の耐ブロッキング性も優れる。
ただし、成形安定性を高める目的のために、最外層13には他の樹脂が併用されることもあり、その場合には適宜HDPEの含有量を決定すればよい。このような他の樹脂としては、HDPE以外のポリオレフィンが挙げられ、直鎖状低密度ポリエチレン、高圧法低密度ポリエチレンなどのポリエチレン樹脂が好ましく使用できる。これらのなかでも、高圧法低密度ポリエチレンをHDPEとともに使用すると、最外層13の成形安定性をより一層高めることができる。高圧法低密度ポリエチレンは、その密度が0.910~0.935g/cm3であるものが好ましく、より好ましくは0.920~0.935g/cm3である。
各層の厚みには特に制限はないが、最内層11が5~100μmで、最外層13が5~100μmであることが好ましい。最内層11の厚みが5μm未満では、収容する薬剤を吸着しやすくなる可能性があり、100μmを超えると、多層体10の柔軟性や、多層体10から医療容器を形成する際のヒートシール性が低下するおそれがある。また、最外層13の厚みが5μm未満では、多層体10の耐熱性が低下するおそれがあり、100μmを超えると、透明性が低下するおそれがある。
従って、3層からなる多層体10の場合には、総厚みを60~1000μmとし、最内層11を5~100μm、最外層を5~100μmとし、残りを中間層12とすることが好ましい。
なお、3層からなる多層体10がフィルムの場合には、最内層11を5~100μm、中間層12を50~300μm、最外層を5~100μmとすることが好ましい。
以下、本発明の医療容器の具体例について、図面を用いて説明する。
この医療容器20は、多層ブロー成形機を用いた通常の多層ブロー成形法により製造できる。すなわち、多層パリソンを押出し、金型で多層パリソンを挟み込んだ後、多層パリソン中に清浄エアーを吹き込めばよい。ここで金型として、収容部21とポート部22とを一体成形できるようなものを使用することにより、中空状のブロー成形体からなる図2の医療容器20を形成できる。また、多層パリソンを金型で挟み込む際、あらかじめ清浄エアーでプリブローしておくとともに、金型を閉じた後に、金型に形成された真空孔を通じて金型内を負圧とすることにより、金型の転写精度を向上させることができる。
すなわち、この医療容器30を製造する場合には、まず、真空成形または圧空成形などの熱板成形により、図1のようなフィルム状の多層体10の中央部に収容部31の内形に沿う凹部を形成し、図4に示すようなフィルム成形品10’を得る。ついで、このフィルム成形品10’を2枚用意し、凹部同士が対向するように重ね合わせる。そして、所定の位置に筒部材を配置しつつ、2枚のフィルム成形品10’の周縁部をヒートシールする。ヒートシール温度としては、多層体10の総厚みにもよるため、特に限定されるものではないが、およそ150~280℃が好ましい。また、ヒートシール後には、必要に応じて周縁部をトリミングしてもよい。このような方法によれば、収容部31の形成と、筒部材のヒートシールによるポート部32の形成とを同時に行い、図3(A)の医療容器30を製造することができる。
なお、収容部31の形成とポート部32の形成とは別工程で行ってもよい。
この例の医療容器40は、多層インフレーション法などで筒状に形成された多層体を使用し、その両端部をヒートシールして収容部41を形成するとともに、その一端の所定の位置に筒部材をヒートシールしてポート部42とし、他端に吊り下げ部を形成する方法で製造できる。両端部のヒートシールと、筒部材のヒートシールとは、同時に行っても、別工程で行ってもよい。また、筒状の多層体を使用する代わりに、図1のような多層体10を2枚使用し、これらを重ね合わせた後、周縁部をヒートシールする方法で収容部を形成してもよい。
また、この例においてポート部42は、環状ポリオレフィンやシングルサイト系触媒により製造されたLLDPEなどで形成される筒部材と、注射針を刺通可能なゴム栓42aと、ゴム栓42aの周縁部を押さえるリング状の蓋部材42bとにより閉塞されている。
図6の複室医療容器50は、袋状に形成された収容部51の幅方向に沿って隔壁シール部52が設けられ、収容部51が第1収容部51aと第2収容部51bとに分割されたものである。隔壁シール部52は、複室医療容器50の使用に際して、使用者が第1収容部51aまたは第2収容部51bを外部から押圧することで剥離し、第1収容部51a内の薬液と第2収容部51b内の薬液とが混合される。
隔壁シール部52の形成方法には制限はなく、例えば、収容部51の形成に際してヒートシールが実施される場合には、それと同時にヒートシールして形成してもよい。また、ヒートシールの他、インパルスシールなどの公知のシール方法で別途行ってもよい。さらに、収容部51をブロー成形で製造する場合には、ブロー成形時に使用する金型に隔壁シール部52を形成するための機構を設けて、ブロー成形と同時に隔壁シール部52を形成できるようにしてもよい。
以上、本発明の医療容器に収容される薬剤として薬液を例として説明したが、薬液だけで無く抗生物質など粉剤からなる薬剤であっても構わない。また、具体的な薬液としては、生理用食塩水、循環器系薬剤、造影剤及び抗菌剤など注射剤として用いられる薬液が挙げられるが、これらに限定されるものではない。
[実施例1]
100mlの水が充填された図2の医療容器20を以下のようにして製造した。
まず、多層ブロー成形機を使用した多層ブロー成形法により、厚さ30μmの最内層と、厚さ250μmの中間層と、厚さ20μmの最外層が順次積層した3層構造のブロー成形体からなる収容部21とポート部22とを一体成形した。ついで、ポート部22から収容部21内に水100mlを充填した後、ゴム栓体22aをポート部22にヒートシールして医療容器20を密封した。ゴム栓体22aとしては、ゴム栓の外周部にISO 1133に準拠し、280℃におけるメルトフローレート(以下「MFR」という。また、実施例、比較例においてMFR測定時の荷重は全て21.18Nである。)が17g/10分、ガラス転移温度が136℃である環状ポリオレフィン「ゼオネックス(日本ゼオン株式会社製)」(以下、「COP1」という。)からなる層が射出成形法で設けられたものを使用した。
中間層には、シングルサイト系触媒により製造されたLLDPE(以下、シングルサイト系LLDPEという場合もある。)であって、190℃におけるMFRが1g/10分、密度が0.906g/cm3である「ハーモレックス(日本ポリエチレン株式会社製)」と、190℃におけるMFRが3.5g/10分、密度が0.956g/cm3であるHDPE「ノバテック(日本ポリエチレン株式会社製)」を8:2の質量比でブレンドしたものを使用した。
最外層には、190℃におけるMFRが3.5g/10分、密度が0.955g/cm3であるHDPE「ノバテック(日本ポリエチレン株式会社製)」を用いた。
なお、実施例及び比較例において、耐ブロッキング性及び成形安定性の評価は、フィルムから成形し、収容部を形成した例の場合にのみ行い、実施例1のごとく多層ブロー成形から収容部を形成した場合には行っていない。
(1)耐ブロッキング性
10cm×10cmの2枚の多層体を、その最外層同士が接するように重ね合わせ、この上に98N/100cm2の荷重を加えて60℃、24時間保持した。その後、室温まで放冷し荷重除去した後に、2枚のフィルムを剥離した。この際の剥離の状態について、以下の2段階で評価した。
○;容易に剥がれる。
×;剥がすのに抵抗がある。
(2)剥離強度
高圧蒸気滅菌前後の医療容器から幅15mmの短冊状のサンプルSを切り出し、図7(A)に模式的に示すようにして、最内層11と中間層12との間のJIS K6854-3に準拠したT形剥離強度を引張速度300mm/分で測定した。試験は引張り試験機により行った。図中符号Pは、引張り試験機のチャックを示す。
なお、図7(A)に示すように、サンプルSをその最内層11のみが破断部Vで破断した状態とするには、まず、図7(B)の平面図に示すように、医療容器から切り出したサンプルSの幅方向の両端部に、互いに対向する2箇所に切り込みCを入れ、図7(B)中の矢印で示すように、サンプルSを長さ方向に引張る。すると、切り込みCの部分において最内層11のみが完全に破断し、他の層は破断していない状態のものを得ることができる。よって、これを引張り試験機にセットすることによって、図7(A)のように、最内層11と中間層12との間の界面の剥離強度を測定できる。
(3)透明性
高圧蒸気滅菌前後のヘイズを JIS K 7136に準拠して測定した。
(4)耐熱性
スプレー式高圧蒸気滅菌機で、丸穴の開いたパンチングメタルトレー上に載置された医療容器を高圧蒸気滅菌し、医療容器の外観を目視で評価した。
○;滅菌後に変形や収縮なし。
△;表面荒れなど若干の変形収縮ある。
×:変形や収縮が大きい、丸穴状のトレー跡などがある。
(5)成形安定性
インフレーション成形中のチューブ形状フィルムの形状安定性及びフィルムの皺の発生状況を評価した。
○:チューブ形状が一定している。フィルムに皺は見られなかった。
×:チューブ形状が不安定でチューブ径にバラツキがある。フィルムには部分的に皺が見られた。
実施例1において、最外層の組成とポート部22の構成を変えた以外は同様にして医療容器20を得た。
最外層には、190℃におけるMFRが1.1g/10分、密度が0.927g/cm3である高圧法低密度ポリエチレン「ノバテック(日本ポリエチレン株式会社製)」と、190℃におけるMFRが3.5g/10分、密度が0.956g/cm3である高密度ポリエチレン「ノバテック(日本ポリエチレン株式会社製)」を7:3の質量比でドライブレンドしたものを使用した。
ポート部22は、射出成形により製造した環状ポリオレフィンからなる筒部材を、250℃に設定された予熱金型で加熱後、図2のブロー成形体からなる収容部21のポート部内22側に挿入し、220℃でヒートシールして装着することで構成した。また、水100mLを充填した後、ゴム栓を筒部材に装填し、その後さらに、リング状の蓋部材をゴム栓の周縁部を押さえつけるように配置し、筒部材と蓋部材とを超音波溶着した。なお、筒部材及び蓋部材には、COP1を使用した。そして実施例1と同様に評価した。結果を表に示す。
最内層の形成に、COP2のみを使用した以外は、実施例1と同様にして医療容器20を得て、同様に評価した。結果を表に示す。
なお、本実施例では、ゴム栓体22aとして、ゴム栓の外周部に中間層で使用したLLDPEからなる層が射出成形法で設けられたものを使用した。
中間層の形成に、190℃におけるMFRが3.5g/10分、密度が0.918g/cm3であるシングルサイト系LLDPE「ハーモレックス(日本ポリエチレン株式会社製)」のみを使用した形成した以外は、実施例3と同様にして医療容器20を得て、同様に評価した。結果を表に示す。
なお、本実施例では、ゴム栓体22aとして、ゴム栓の外周部に中間層で使用したLLDPEからなる層が射出成形法で設けられたものを使用した。
中間層の形成に、190℃におけるMFRが4.0g/10分、密度が0.931g/cm3であるシングルサイト系LLDPE「ユメリット(宇部興産株式会社製)」のみを使用した以外は、実施例3と同様にして医療容器20を得て、同様に評価した。結果を表に示す。
なお、本実施例では、ゴム栓体22aとして、ゴム栓の外周部に中間層で使用したLLDPEからなる層が射出成形法で設けられたものを使用した。
中間層の形成に、190℃におけるMFRが2.0g/10分、密度が0.904g/cm3であるシングルサイト系LLDPE「ユメリット0520F(宇部興産株式会社製)」と、190℃におけるMFRが3.5g/10分、密度が0.956g/cm3であるHDPE「ノバテック(日本ポリエチレン株式会社製)」を8:2の質量比でブレンドしたものを使用した以外は実施例1と同様に医療容器20を得て、同様に評価した。結果を表に示す。
なお、本実施例では、ゴム栓体22aとして、ゴム栓の外周部にCOP1からなる層が射出成形法で設けられたものを使用した。
100mlの水が充填された図3の医療容器30を以下のようにして製造した。
まず、多層インフレーションフィルム成形機を使用した多層インフレーション法により、厚さ10μmの最内層と、厚さ220μmの中間層と、厚さ20μmの最外層が順次積層した3層からなるインフレーションフィルムを製造した。
ついで、このインフレーションフィルムを切断して得たフィルム片を300℃に設定されたヒーターにより輻射加熱により軟化させ、常温の金型を用いて真空成形機で成形し、図4のフィルム成形品10’を得た。
そして、このフィルム成形品10’を凹部同士が向かい合うように2枚重ね合わせ、周縁部をヒートシールし、その後、環状ポリオレフィンの射出成形品である筒部材をヒートシールし、ポート部32を形成した。
ついで、ポート部32から収容部31内に水100mlを充填した後、図3(B)に示すように、ゴム栓32bを筒部材に装填し、その後さらにリング状の蓋部材32cをゴム栓32bの周縁部を押さえつけるように配置し、筒部材と蓋部材32cとを超音波溶着した。なお、筒部材及び蓋部材32cには、COP1を使用した。
そして、密封した医療容器30について評価した。結果を表に示す。
100mlの水が充填された図5の医療容器40を以下のようにして製造した。
まず、実施例7と同様にして、3層構造のインフレーションフィルムを製造した。
ついで、このインフレーションフィルムの両端部をヒートシールして袋状にするとともに、その一端に、COP2の射出成形品である筒部材をヒートシールし、フィルムバッグ型の収容部41にポート部42を形成した。
ついで、ポート部42から収容部41内に水100mlを充填した後、ゴム栓42aを筒部材に装填し、その後さらにリング状の蓋部材42bをゴム栓42aの周縁部を押さえつけるように配置し、筒部材と蓋部材42bとを超音波溶着した。なお、筒部材及び蓋部材42bには、COP1を使用した。
そして、密封した医療容器40について評価した。結果を表に示す。
最外層に、190℃におけるMFRが1.1g/10分、密度が0.927g/cm3である高圧法低密度ポリエチレン「ノバテック(日本ポリエチレン株式会社製)」と、190℃におけるMFRが3.5g/10分、密度が0.956g/cm3である高密度ポリエチレン「ノバテック(日本ポリエチレン株式会社製)」を7:3の質量比でブレンドしたものを使用した以外は、実施例8と同様に医療用容器20を得て、同様に評価した。結果を表に示す。
最外層に、190℃におけるMFRが2.0g/10分、密度が0.936g/cm3であるチーグラ触媒を用いて製造された直鎖状低密度ポリエチレン「ノバテック(日本ポリエチレン株式会社製)」と、190℃におけるMFRが3.5g/10分、密度が0.956g/cm3である高密度ポリエチレン「ノバテック(日本ポリエチレン株式会社製)」を7:3の質量比でブレンドしたものを使用した以外は、実施例8と同様に医療用容器20を得て、同様に評価した。結果を表に示す。
実施例1において、中間層の主成分として、シングルサイト系LLDPEの代わりに、190℃におけるMFRが1.1g/10分、密度が0.906g/cm3であるチーグラー触媒を用いて製造されたLLDPE(日本ポリエチレン株式会社製)を使用した以外は、実施例1と同様にして、医療容器の成形と評価を実施した。評価結果を表に示す。
中間層の形成に、190℃におけるMFRが2.0g/10分、密度が0.920g/cm3であるチーグラー触媒を用いて製造されたLLDPE「モアテック(株式会社プライムポリマー製)のみを使用した以外は実施例1と同様にして、医療容器の成形と評価を実施した。評価結果を表に示す。
最外層を形成せず、最内層と中間層の2層構造とした以外は実施例1と同様にして、医療容器の成形と評価を実施した。評価結果を表に示す。
最外層の形成に、HDPEの代わりに、190℃におけるMFRが2.0g/10分、密度が0.920g/cm3であるチーグラー触媒を用いて製造されたLLDPE「モアテック(株式会社プライムポリマー製)」のみを使用した以外は実施例1と同様にして、医療容器の成形と評価を実施した。評価結果を表に示す。
最外層の形成に、HDPEの代わりに、190℃におけるMFRが2.0g/10分、密度が0.920g/cm3であるチーグラー触媒を用いて製造されたLLDPE「モアテック(株式会社プライムポリマー製)」を使用した以外は実施例8と同様にして、医療容器の成形と評価を実施した。評価結果を表に示す。
最外層が設けられていない比較例3では、高圧蒸気滅菌による透明性の低下が大きいとともに、耐熱性も悪かった。最外層がHDPEを含んでいない比較例4および5でも、比較例3と同様の傾向が認められた。最外層の成分として、HDPEに高圧法低密度ポリエチレンを併用した実施例9および10では、最外層がHDPEのみの実施例7や8にくらべて成形安定性がより優れていた。
さらに、実施例8ではフィルムの耐ブロッキング性が良好であったが、比較例5では不良であった。
Claims (11)
- 医療容器の形成に使用される医療容器用多層体であって、
環状ポリオレフィンからなる最内層と、
該最内層に隣接するように形成され、シングルサイト系触媒を使用して製造された直鎖状低密度ポリエチレンを主成分とする中間層と、
高密度ポリエチレンを含有する最外層とを少なくとも有することを特徴とする医療容器用多層体。 - 前記環状ポリオレフィンは、環状オレフィンモノマーの開環重合体の水素添加物であることを特徴とする請求項1に記載の医療容器用多層体。
- 前記直鎖状低密度ポリエチレンの密度は、0.860g/cm3以上0.940g/cm3未満であることを特徴とする請求項1に記載の医療容器用多層体。
- 前記高密度ポリエチレンの密度は、0.940~0.970g/cm3であることを特徴とする請求項1に記載の医療容器用多層体。
- 前記最外層は、前記高密度ポリエチレンと高圧法低密度ポリエチレンとの混合物であることを特徴とする請求項1に記載の医療容器用多層体。
- 前記最外層は、前記高密度ポリエチレンのみからなることを特徴とする請求項1に記載の医療容器用多層体。
- 総厚みが60~1000μmであって、
厚みが5~100μmの前記最内層と、前記中間層と、厚みが5~100μmの前記最外層との3層からなることを特徴とする請求項1に記載の医療容器用多層体。 - 薬液を収容する収容部を備えた医療容器であって、
少なくとも前記収容部は、請求項1に記載の医療容器用多層体からなることを特徴とする医療容器。 - 前記医療容器用多層体はブロー成形体であることを特徴とする請求項8に記載の医療容器。
- 前記医療容器用多層体はフィルムであり、
前記収容部は、前記フィルムが熱板成形されたものであることを特徴とする請求項8に記載の医療容器。 - 前記医療容器用多層体はフィルムであり、
前記収容部は、前記フィルムが袋状に形成されたものであることを特徴とする請求項8に記載の医療容器。
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AU2007363011A AU2007363011B2 (en) | 2007-12-20 | 2007-12-20 | Multilayered body for medical containers and medical container |
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CN200780102018.0A CN101903002B (zh) | 2007-12-20 | 2007-12-20 | 医疗容器用多层体和医疗容器 |
KR1020107013434A KR101195707B1 (ko) | 2007-12-20 | 2007-12-20 | 의료 용기용 다층체 및 의료 용기 |
ES07859902.4T ES2534740T3 (es) | 2007-12-20 | 2007-12-20 | Cuerpo multicapa para recipientes médicos y recipiente médico |
US12/809,005 US9050243B2 (en) | 2007-12-20 | 2007-12-20 | Multilayered body for medical containers and medical container |
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AU2007363011A1 (en) | 2009-07-02 |
EP2226059B1 (en) | 2015-02-18 |
CN101903002B (zh) | 2013-05-01 |
ES2534740T3 (es) | 2015-04-28 |
US20100276321A1 (en) | 2010-11-04 |
EP2226059A4 (en) | 2012-03-21 |
KR20100087226A (ko) | 2010-08-03 |
US9050243B2 (en) | 2015-06-09 |
AU2007363011B2 (en) | 2012-08-09 |
EP2226059A1 (en) | 2010-09-08 |
CN101903002A (zh) | 2010-12-01 |
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