JP5198642B2 - Packaging material manufacturing method - Google Patents

Description

  The present invention relates to a method for manufacturing a packaging material suitable for packaging an object such as a medical device that needs to be sterilized.

  A medical device such as a pre-field syringe into which a chemical solution has been previously injected needs to be sterilized after packaging. However, if sterilization is performed by applying heat, the previously injected chemical may be altered by heat, and if sterilized by irradiation with radiation, the chemical may be altered by radiation. In contrast, gas sterilization does not alter the chemical solution, but cannot be gas sterilized after hermetically wrapping.

  Therefore, in order to enable gas sterilization after packaging, a packaging method has been developed in which a gas-permeable nonwoven fabric that does not allow passage of bacteria is partially provided. However, in this packaging method, the synthetic resin film of the packaging material and the gas-permeable non-woven fabric are individually supplied to the packaging machine, and the synthetic resin film and the non-woven fabric are joined and integrated in the packaging machine to wrap the object to be encapsulated. Therefore, an expensive dedicated automatic packaging machine is required, and there is a fatal problem that it cannot be carried out by an automatic packaging machine that supplies and wraps a synthetic resin film that has been widely used conventionally.

  Although the present applicant investigated the prior art which performs the packaging which can carry out the gas sterilization after packaging using a general purpose automatic packaging machine, such a prior art was not found.

  The present invention has been made to cope with the above-mentioned problems, and it is easy to use a long packaging material for a packaging method capable of performing packaging capable of gas sterilization after packaging using a conventional automatic packaging machine. An object of the present invention is to provide a method for manufacturing a packaging material that can be manufactured in a simple manner. In a preferred embodiment, another object of the present invention is to provide a method for manufacturing a packaging material that can be easily opened and is not affected by ultraviolet rays.

  In order to solve the above-mentioned problems, the packaging material manufacturing method of the present invention comprises a continuous gas-permeable belt-like material that does not allow passage of bacteria and a heat-weldable synthetic resin film having a width equal to the entire width of the packaging material. The synthetic resin film is overlapped on the belt-like material so that the center lines of both sides coincide with each other, and the synthetic resin film is cut on both sides of the center line, leaving the overlapping portions with both side edges of the belt-like material. The overlapping portions of the both side edges of the belt-like material and the synthetic resin film are integrated by heat welding, and then the cut central portion of the synthetic resin film is removed.

  In the manufacturing method of the packaging material of this invention, it is preferable that a strip | belt-shaped material is either the tape which consists of a synthetic resin fiber nonwoven fabric, or the tape which consists of pulp. The synthetic resin film is preferably a laminate film obtained by laminating upper and lower resin films with an adhesive, and one or both of the upper and lower resin films are preferably heat-weldable films. In particular, one or both of the upper and lower resin films of the laminate film are preferably longitudinally tearable films that are easy to tear in the length direction of the packaging material, and among them, the laminate film includes the upper longitudinally tearable polyethylene terephthalate film and the lower film. It is more preferable that the low density polyethylene film on the side is laminated with a urethane resin adhesive. Moreover, it is also preferable to contain a ultraviolet absorber in the adhesive of a laminate film.

  In the method for producing a packaging material of the present invention, a synthetic resin film is overlaid on a belt-like material so that both center lines coincide with each other, and the synthetic resin film is placed on the center line leaving an overlapping portion with both side edges of the belt-like material. Cut on both sides, heat weld the overlapping part of both sides of the strip and the synthetic resin film, and remove the cut central part of the synthetic resin film, which can easily achieve the effects described below A packaging material can be produced. That is, the packaging material produced by this manufacturing method is obtained by fusing and integrating a heat-weld synthetic resin film on both side edges of a gas-permeable band-like material that does not allow passage of bacteria. It can be handled in the same manner as a packaging material such as a synthetic resin film. Therefore, the packaging material produced by the present invention is supplied to a general-purpose automatic packaging machine to wrap the object to be wrapped, and the overlapping edges of the synthetic resin film of the packaging material are thermally welded, and the packaging material is attached to both ends of the object to be wrapped. If it seals in a bag shape by heat-welding in the vicinity place, it can package an article efficiently like the conventional packaging material. Therefore, it is not necessary to introduce an expensive dedicated automatic packaging machine, so that it is possible to prevent an increase in equipment cost, which is extremely advantageous economically.

  When packaging an object such as a medical device using the packaging material produced by the packaging material manufacturing method of the present invention as described above, sterilizing gas is supplied into the package through the gas-permeable band material. This enables easy and reliable gas sterilization of the encapsulated material, and also prevents bacteria from entering the package body from the outside after gas sterilization through the strip material, so that the inside of the package body is maintained in a sterile state. can do.

  In the method for producing a packaging material of the present invention, a tape made of a synthetic resin fiber non-woven fabric or a tape made of pulp is preferably used as the strip material, and a laminate film is preferably used as the synthetic resin film. If one or both of the upper and lower resin films is a longitudinally tearable film that is easy to tear in the length direction of the packaging material, the package can be opened easily by tearing the laminate film in the length direction (longitudinal direction) with the toe. The envelop can be taken out. In addition to the above effects, the laminate film is formed by laminating the upper longitudinally tearable polyethylene terephthalate film and the lower low-density polyethylene film with a urethane-based resin adhesive. The strength (seal strength) and the heat welding strength (seal strength) of the overlapping portions of the laminate films during packaging can be improved. Furthermore, if the adhesive of the laminate film contains an ultraviolet absorber, the ultraviolet rays are absorbed and do not enter the inside of the package, so even if the encapsulated item is a medical device such as a pre-field syringe into which the medicine has been pre-injected. , Worry that the drug will be altered by ultraviolet rays.

It is a perspective view which shows one Embodiment of the packaging material produced by the manufacturing method of the packaging material of this invention. It is a cross-sectional view of the packaging material. It is a perspective view of the package which packaged the package using the packaging material.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

  The packaging material W produced by the packaging material manufacturing method of the present invention is a long material in which synthetic resin films 2 and 2 capable of thermal welding are thermally welded to both side edges of a gas-permeable belt-like material 1 that does not allow passage of bacteria. The packaging material is rolled and handled as shown in FIG.

  The size of each part of the packaging material W varies depending on the size of the envelopment. For example, when the envelopment is a pre-field syringe, the width of the strip 1 is about 5 to 30 mm, and both sides of the strip 1 The thermal welding width (seal width) between the edge and the side edges of the synthetic resin films 2 and 2 is about 3 to 10 mm, the total width of the packaging material W is about 50 to 300 mm, and the total length of the packaging material W is about 100 to 2000 m. It is preferable that the widths of both the synthetic resin films 2 and 2 are set to be equal so that the belt-like material 1 is positioned on the center line of the packaging material W.

  It is necessary to use a gas-permeable material that does not allow bacteria to pass through the strip 1, and for example, a tape made of a non-woven fabric of synthetic resin fibers having a thickness of about 100 to 300 μm or a tape made of pulp is preferable. used. When the thickness of the strip 1 exceeds 300 μm, the packaging material W becomes inferior when rolled, and when the thickness is less than 100 μm, it tends to be easily broken due to a decrease in strength.

  As the tape made of the former non-woven fabric, a non-woven fabric of ultrafine fibers of high-density polyethylene available under the trade name “Tyvek” (registered trademark of DuPont) (weighing value: 40 to 110 g / m 2, thickness: 130 to 260 μm) The tape produced in (1) is particularly preferably used.

  The synthetic resin films 2 and 2 that are thermally welded to both side edges of the strip 1 may be a single layer film or a laminate film as long as they can be thermally welded. It is preferable to use a colorless and transparent laminate film as in the embodiment.

  As shown in an enlarged view in FIG. 2, this laminate film is obtained by laminating upper and lower colorless and transparent resin films 2a and 2b with a colorless and transparent adhesive, and one or both of the resin films 2a and 2b are heated. It consists of a film that can be welded. As the heat-weldable film, any film made of various thermoplastic resins can be used. Among them, a low-density polyethylene film having a low softening melting temperature and easy heat-welding is particularly preferably used. .

  This laminate film uses the above-mentioned low-density polyethylene film as the lower resin film 2b, so that the heat-welding strength (seal strength) with the strip 1 and the heat-welding strength of the overlapping portions of the laminate films during packaging (Seal strength) is improved, and as the upper resin film 2a, a longitudinal tearable film that is easy to tear in the length direction of the packaging material W is used. After packaging, the laminate film is easily opened by tearing with a toe. The package can be taken out. Examples of the longitudinal tearable film include Emblet PC (grade name of longitudinal tearable polyethylene terephthalate film manufactured by Unitika Ltd.), MCMD (grade name of longitudinal tearable stretched oriented polypropylene film manufactured by Phutamura Chemical Co., Ltd.). Emblem NC (grade name of longitudinally tearable nylon film manufactured by Unitika Ltd.) is preferably used. Among these films, Emblet PC is optimal because it has excellent longitudinal tearability and other physical properties. Of course, longitudinally tearable films may be used for the upper and lower resin films 2a and 2b as well as the upper resin film 2a.

  As the adhesive 2c for the laminate film, one having high compatibility with the upper and lower resin films 2a and 2b is used. For example, the upper resin film 2a is the above-mentioned vertically tearable polyethylene terephthalate film, and the lower resin film 2b. Is a low-density polyethylene film, a urethane-based resin adhesive is preferably used.

  The adhesive 2c preferably contains an appropriate amount of an ultraviolet absorber. When the ultraviolet absorber is contained in this manner, after the packaging, ultraviolet rays are absorbed and the encapsulated material is not irradiated. Even if it is a medical device such as a pre-field syringe into which the medicine is injected, there is no need to worry about the alteration of the medicine by ultraviolet rays. As the ultraviolet absorber, a known benzotriazole-based or benzophenone-based ultraviolet absorber is used. The ultraviolet absorber may be contained in one or both of the upper and lower resin films 2a and 2b. However, if the adhesive 2c contains an ultraviolet absorber as in this laminate film, the resin films 2a and 2b are obtained. Since a laminate film can be produced by combining various films from a film not containing an ultraviolet absorber to a film containing it, there is an advantage that variations are increased.

  The thickness of the laminate film is not particularly limited, but a laminate film having a thickness of about 100 to 300 μm is preferably used. If the thickness is less than 100 μm, the strength required for packaging may be insufficient and breakage may occur. On the other hand, if the thickness is greater than 300 μm, the film strength is unnecessarily increased, resulting in wasted material.

  The laminated film may be colored and transparent, but if it is colorless and transparent as in this embodiment, there is an advantage that the encapsulated material or the printing applied to the encapsulated material can be clearly seen through after packaging.

  The packaging material W having such a configuration can be easily produced by the packaging material manufacturing method of the present invention described below. First, a gas-permeable belt-like material 1 that does not allow bacteria to pass through and a synthetic resin film 2 (laminate film) having a width equal to the entire width of the packaging material W are continuously supplied. 2 are overlapped so that both center lines coincide. Subsequently, it sends to a cutting process and the synthetic resin film 2 is cut | disconnected by the both sides of a centerline, leaving the overlap part with the both-sides edge of the strip | belt-shaped material 1. FIG. And it sends to a heat welding process (sealing process), and the both-sides edge of the strip | belt-shaped material 1 and the overlap part of the synthetic resin film 2 are heat-welded and integrated. Finally, it is sent to the trimming process, the cut central portion of the synthetic resin film 2 is removed to expose the central portion of the belt-like material 1, and it is wound on a roll as it is, so that a long packaging material W as shown in FIG. Is obtained.

  Since the long packaging material W as described above can be handled in the same manner as a conventional packaging material such as a synthetic resin film, it is efficient to use a general-purpose automatic packaging machine by the packaging method described below. The package can be well packaged. That is, the roll-wrapped long packaging material W prepared in advance is attached to a feeding device of a general-purpose automatic packaging machine, supplied onto the package, and the package is wrapped in a cylinder with the packaging material W. Then, the overlapping edges of the synthetic resin films 2 and 2 of the packaging material W are heat-sealed by a heat welding device, and the packaging material W is sealed in a bag shape by pressing the packaging material W at locations near both ends of the envelopment. If it stops and the packaging material W is cut | disconnected in the middle of this sealing part, a package can be automatically packaged efficiently.

  Therefore, when the above packaging method is adopted, there is no need to introduce an expensive dedicated automatic packaging machine for supplying the synthetic resin film and the strip material separately and bonding them in the packaging machine. As it is possible to carry out packaging capable of gas sterilization after packaging, there is no increase in equipment costs and it is economical.

  FIG. 3 is a perspective view of a package in which a pre-field syringe pre-injected with a medicine as an encapsulated object 3 is packaged by the above-described packaging method using the packaging material W produced by the packaging material manufacturing method of the present invention. As shown in the figure, the overlapping edge of the lower ends of the synthetic resin films 2 and 2 of the packaging material W for wrapping the enveloping object 3 is heat-sealed, and the enveloping object 3 is packaged in the vicinity of both ends. The material W is pressed and thermally welded to be sealed in a bag shape. Such a package can easily and surely sterilize the encapsulated material 3 by supplying sterilization gas into the package through the gas-permeable strip 1 of the packaging material W, Since the bacteria do not enter the inside of the package body from the outside after the gas sterilization, the inside of the package body can be maintained in a sterile state. Since the upper resin film 2a is a longitudinally tearable film and the adhesive 2c contains a colorless and transparent laminate film as described above, the synthetic resin film 2 is used. The packaging film can be easily opened by vertically tearing the laminate film with the toe, and the encapsulated material 3 can be taken out. The medicine injected into the pre-field syringe of the encapsulated material 3 is altered by the ultraviolet absorber. Of course, the medicine name printed on the pre-field syringe can be clearly seen and used without fail.

1 Gas-permeable band material that does not allow bacteria to pass through 2 Synthetic resin film (laminate film)
2a Resin film on the upper side of the laminate film 2b Resin film on the lower side of the laminate film 2c Adhesive for the laminate film 3 Encapsulation W Wrapping material

Claims (6)

  Continuously supply a gas-permeable band material that does not allow germs to pass through and a heat-sealable synthetic resin film having a width equal to the entire width of the packaging material. Laminate so that they match each other, cut the synthetic resin film on both sides of the center line, leaving the overlapping part with both side edges of the strip, and heat weld the overlapping part of the both sides of the strip with the synthetic resin film A method for producing a packaging material, characterized in that after being integrated, the cut central portion of the synthetic resin film is removed.   The method for producing a packaging material according to claim 1, wherein the belt-like material is either a tape made of a synthetic resin fiber non-woven fabric or a tape made of pulp.   The synthetic resin film is a laminate film obtained by laminating upper and lower resin films with an adhesive, and one or both of the upper and lower resin films are heat-weldable films. The manufacturing method of the packaging material of description.   4. The method for producing a packaging material according to claim 3, wherein one or both of the upper and lower resin films of the laminate film are easily tearable in the length direction of the packaging material.   The method for producing a packaging material according to claim 4, wherein the laminate film is obtained by laminating an upper longitudinal tearable polyethylene terephthalate film and a lower low-density polyethylene film with a urethane-based resin adhesive.   6. The method for producing a packaging material according to claim 3, wherein the adhesive for the laminate film contains an ultraviolet absorber.

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