JP6281060B2 - Contact lens container - Google Patents

Description

  The present invention relates to a contact lens container having a novel structure for storing and storing a contact lens during a period of use, and in particular, can effectively prevent dirt, microbial contamination, and Acanthamoeba keratitis in the container storage part. It relates to the container.

  Contact lenses (hereinafter simply referred to as “lenses”) are used continuously, but they are removed during sleep, etc., temporarily stored in containers, and various functions that have been deteriorated by cleaning or wearing the lenses. Care is taken to recover. As in recent years, the concept of when the lens is removed when it is removed is not necessary for a container for storing the lens after wearing, under the circumstances where lenses that are discarded after continuous wear or lenses that are disposable every day are being marketed. There is also an opinion. As a container for storing a disposable lens, there has been proposed a disposable storage container that reliably eliminates repeated use by a user and cannot be resealed. However, in addition to scenes where you want to take your eyes off by putting the lens off before the expiration date, or you have to remove it by putting garbage in during wearing, There are life styles that use different lenses depending on the usage scene, such as a two-week replacement type and a conventional long-time use type, and a storage container is still required.

  In addition, while more sophisticated care products appear, there are many eye problems due to insufficient care. One cause of such trouble is that the lens is contaminated during storage. Regarding the storage container, it is mainly to store the lens after use rather than to accommodate the unused lens, so dirt components such as tear fluid components and fingers attached to the lens, or germs are brought into the container. This is because it is assumed. The most serious complication of contact lenses is infectious keratitis. Severe lens-related keratitis that requires hospitalized treatment is often caused by Pseudomonas aeruginosa or Acanthamoeba. Acanthamoeba keratitis has been reported to increase rapidly in Japan since around 2006, but it has also been pointed out that the multi-purpose solution that is widely used as a contact lens care product has a weak disinfection effect against Acanthamoeba. Yes. Therefore, in order to continue wearing the lens safely, appropriate care including management of the lens storage container is indispensable.

  As a method for managing the lens storage container in a clean state, for example, a lens housing part whose surface is made of copper or silver (Patent Document 1), a synthetic material in which soluble glass containing silver ions is dispersed Resin containers and lens holders attached (Patent Documents 2, 3 and 4), antibacterial metal-supported holders containing ion exchangers (Patent Document 5), zinc ions There are those using a resin in which the soluble glass contained is dispersed (Patent Document 6). In these proposals, antibacterial substances are gradually eluted from the container into the preservation solution, thereby suppressing the growth of microorganisms, etc., because there is no need for the user to perform any operation. Very simple.

  The above method is effective when the storage container is relatively new, but the amount of the antibacterial substance eluted decreases with use, the resin surface eluting the antibacterial substance is covered with dirt, Is not sufficiently effective against all microorganisms and the like, there is a possibility that a biofilm is formed. In the first place, the purpose of these containers is to prevent microbial contamination, and the disinfection effect on the protist Acanthamoeba is weak and does not correspond to the dirt in the containers. Therefore, it is necessary to clean the container itself against dirt brought in such as lacrimal fluid components and fingers, but Acanthamoeba has many stab-like artificial feet and adheres to the container surface. It is not easy to completely clean a contaminated container.

  By the way, in the field of food storage containers, in preparation for the case where the container is soiled, a single-layer or multiple-layer sheet is previously laminated on the inner surface of the container in contact with the contents, and if it becomes dirty, it is peeled off and a new sheet is placed on the surface Several containers have been proposed (Patent Documents 7, 8, and 9). When storing food, it is naturally expected that a portion of the food will remain in the container, and the proposed container is a conventional container because of the relationship with the “Container and Packaging Recycling Law” enforced in April 1997. The purpose is not to dispose of it as easily as possible, but to use and utilize it as recycled resources as much as possible. Therefore, in these containers, it is considered that dirt is easily removed in the flow of container recycling, rather than being continuously used by the same person. In addition, in order to recycle the paper packaging container in a clean state, there is also a proposal for a sheet (Patent Document 10) laminated using a peelable adhesive or the like. In this case, since the process of using an adhesive increases, it seems that there is a problem in terms of cost.

Japanese Utility Model Publication No. 2-25243 JP-A-4-22361 Japanese Utility Model Publication No. 4-35436 JP-A-11-64806 JP-A-5-341240 JP-A-8-62551 Japanese Utility Model Publication No. 3-111952 Japanese Utility Model Publication No. 7-33828 JP 2000-344224 A JP 2001-328622 A

  The present invention has been made in the context of the above circumstances, and the problem to be solved is a novel function that can function effectively and easily handle dirt and microbial contamination of contact lens storage containers and an acanthamoeba adhered to the container. It is to provide a storage container having a simple structure.

  The present invention relates to a container body, a contact lens accommodating portion, a first flexible laminated resin film covering at least the inner surface of the accommodating portion, and a lid for releasably sealing the contact lens in the accommodating portion. The first flexible laminated resin film is peelable for each single layer with a peel strength of 10 to 500 gf.

  Containers with such a structure have been adopted for reasons such as eliminating the hassle of cleaning containers when it is normal that a part of food can always adhere like a tray in the food field. There is no example adopted in this field. The reasons are as follows: (1) Conventional contact lenses are used for a long period of more than one year, and moreover, they are used by wearing them on their eyes. Since the dirt is removed from the lens due to the habit of maintaining it, it is difficult to assume that the storage container is dirty. (2) Even if it is dirty, it is dirt from the tear fluid component and fingers at most. The amount of dirt brought into the container is not so great as to contaminate the inside of the container, and (3) even if it is contaminated by Acanthamoeba, it is sufficiently killed by boiling disinfection.

  However, disposable lenses have emerged as in recent years, and awareness of the importance of cleaning has been diminished by the sense of security that clean lenses are always available, and high-performance lens care products are provided. As a result, the amount of dirt brought into the storage container has tended to increase compared to conventional cases, and the need for a multi-purpose solution to replace boiling disinfection has been reduced. It became impossible to kill the Acanthamoeba sufficiently. The container of the present invention is also made by capturing such changes in contact lens life.

  The container of the present invention is characterized in that the inner surface of the lens housing is covered with a flexible laminated resin film, and this film is peeled off to periodically clean the surface before dirt or microorganisms and acanthamoeba adhere or multiply. It is essentially different from what we deal with after getting dirty like in the food field. The container of the present invention can be removed a plurality of times, for example, twice (equivalent to 2 days), 7 times (equivalent to 7 days), 14 times (equivalent to 14 days), or 28 times (equivalent to 28 days) before peeling off the film. However, it is also different in that the conventional product corresponding to dirt as in the food field is a single use. Moreover, in order to peel off a film regularly, it is one of the characteristics that the peeling strength can be peeled with a moderate force of 1-500 gf.

  As another aspect of the present invention, a grip portion for peeling the first flexible laminated resin film may be provided. As described above, it is necessary to peel off the film periodically such as daily, weekly or monthly in order to keep the lens housing portion clean at all times. This is because the user can be urged to peel off the film. Moreover, although it is necessary to peel a film one by one from the top in order from the top, in order to prevent misuse, such as peeling a plurality of sheets simultaneously, the holding part may be provided with a means for preventing a plurality of sheets from being peeled simultaneously. As means for preventing multiple sheets from being peeled simultaneously, means for making the upper film gripping part larger or smaller, means for providing a gripping part with separation parts such as protrusions, tails, and protrusions, and making the gripping part shape for each film easy to peel off As means for differentiating, and means for making the gripping part soft and easy to separate, means for making the length of the gripping part 3 mm or more, preferably 6 mm or more, more preferably 10 mm or more, most preferably 15 mm or more, film There may be provided means for adjusting the thickness to 10 to 80 μm, preferably 20 to 60 μm, more preferably 30 to 50 μm. In addition, you may provide a holding part in multiple places. This is because it is a compensation for the relationship between the dominant arm and some sort of malfunction.

  The inner surface of the lid is also coated with a second flexible laminated resin film, and the second flexible laminated resin film can be peeled for each single layer with a peel strength of 1 to 500 gf. May be. This is because the lens housing portion is the most easily contaminated portion, but in order to keep the entire lens housing portion clean, it is preferable that the inner surface of the lid body is also covered with a film that is easily peeled off. On the other hand, in the food field, it suffices to seal the food until it is distributed from the dealer to the customer. Usually, the lid is not used, and the opening is simply covered with a wrap or the like. Therefore, there was no need to configure the lid body with a laminated resin film. In the present invention, since the sealing and unsealing of the housing lens are repeated frequently, an idea different from the food field is also necessary in that the same person repeatedly uses the container. In addition, the first flexible laminated resin film of the housing part and the second flexible laminated resin film of the lid are formed from an integrated flexible laminated resin film, or connected. Thus, it may be formed so as to be peeled off simultaneously by one peeling operation. In this case, a plurality of gripping portions may be provided. Furthermore, in order to ensure the sealing of the storage portion, a means for connecting the storage portion and the lid may be provided. As means for coupling, the housing part and the lid are coupled by a hinge, and a protrusion and a recess are provided on the opposite side of the hinge so as to be able to be opened and closed. Means for engaging in an openable and closable manner, means for covering the inner box in an openable / closable manner with the outer box, means for covering the inner box in a tapered manner so as to be openable / closable with the outer box, means for covering the inner box with the outer box and protruding Ordinary coupling means such as a means for providing an opening and a recess and engaging with each other so as to be opened and closed can be used. In addition, when the accommodating part is integrated with the container main body, the above-described connecting means may be performed between the container main body and the lid body as long as the sealing of the accommodating part is maintained.

  It is preferable that each layer of the first flexible laminated resin film includes at least one piece of information on the remaining number of the flexible laminated resin film, the peeling time, and the contact lens replacement time. This information is letters, numbers, symbols, a combination of these, or a display with colors. By periodically peeling the resin film, a clean state can be maintained before dirt is accumulated. In addition to displaying not only the container but also the replacement time of the lens, it is possible to regularly promote replacement with a new one, which helps to maintain eye health. It should be noted that the specific date and number of the peeling time etc. are not described, the description part or column of the peeling time etc. is provided, and one or more information is also written that the user describes the actual peeling time with magic etc. It goes without saying that it is equivalent to what has been done.

  Furthermore, the following modes can be exemplified as means for allowing the user to clearly recognize the end of use of the storage unit. One is a means for urging the disposal of the storage unit because the lens storage unit is provided with one or more through holes so that the storage solution cannot be retained. In addition, the last first flexible laminated resin film is fixed to the housing portion so that it cannot be completely peeled off, and means for indicating that it cannot be used any more, or the last first flexible laminated resin film. There are means for displaying a display indicating the end of use when the resin film is peeled off. These means may be only one or may be provided in combination. In addition, means for preventing the lens from adsorbing may be provided in the lens housing portion covered with the first flexible laminated resin film. As means for preventing the lens from adsorbing to the film, means for reducing the contact area between the lens and the film, and means for increasing the contact area between the lens and the storage solution, means for providing irregularities on the film surface, curvature of the film inner surface Means for increasing the radius 0.1 mm or more, preferably 0.5 mm or more, more preferably 1 mm or more, and most preferably 2 mm or more from the radius of curvature of the lens outer surface, the curvature radius of the film inner surface 9 mm or more, preferably 10 mm or more Means for preferably 11 mm or more, most preferably 12 mm or more, and means for making the shape of the inner surface of the film different from the substantially spherical shape of the lens outer surface, such as an ellipse or a hyperbola, may be provided. As a means for hydrophilizing the film surface to weaken the affinity between the hydrophobic part of the lens or the dirt attached to the lens and the hydrophobic part of the film surface, means for forming the film with a hydrophilic resin, film surface There may be provided a means for plasma treatment, and a method for treating the film surface with a preservative solution containing at least one of a surfactant, a thickener, an isotonic agent, a pH buffering agent and the like before use. Further, a film in which an antibacterial agent such as silver, copper, zinc or titanium dioxide is kneaded may be used, or the surface may be coated with a known antibacterial agent to impart antibacterial properties to the film.

  In the contact lens storage container of the present invention, the surface of the lens housing portion is covered with a plurality of peelable films, and a clean lens can always be stored by peeling the films before they become dirty. And since it is laminated | stacked with moderate peeling strength, it is easy to peel off a film. Moreover, since each film is provided with a grip portion, there is an effect that the film can be easily peeled off.

  By arranging the same laminated resin film not only on the lens housing portion but also on the lid, the entire lens housing space can be made clean.

  In addition, by displaying the remaining number of resin films, the time of peeling, or even when the contact lens is replaced, the user can be encouraged to always switch to new products to maintain eye health. While being able to lead a comfortable contact lens life. In addition, by clearly recognizing the disposal time of the lens housing portion, the replacement of the housing portion can be controlled to maintain the quality of the housing portion, and excessive use can be effectively prevented.

FIG. 1 schematically shows an embodiment of the present invention. FIG. 2 shows an example of a molding method according to an embodiment of the present invention. 2 (I) is a plan view of the base before molding, FIG. 2 (II) is a side view of the base before molding, and FIG. 2 (III) is a perspective view after molding. FIG. 3 schematically shows an embodiment of the present invention. FIG. 4 schematically shows an embodiment of the present invention. FIG. 5 shows a model of the shape of only the gripping portion of the container of the present invention. FIG. 6 shows an example of measurement of the peel strength of a flexible laminated resin film including a container for the container of the present invention. FIG. 7 shows an example of measuring the peel strength of the flexible laminated resin film for the container of Example 1 of the present invention. FIG. 8 shows a measurement example of the peel strength of the flexible laminated resin film for the container of Example 2 of the present invention.

  The present invention relates to a container in which a surface of a housing portion is laminated with a peelable flexible resin film in order to keep a space for housing a contact lens in a clean state. Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 schematically shows a lens container (1) according to a first embodiment of the present invention. The container main body (2) provided integrally with the lens housing portion (3), and the lid (6) for sealing the opening (5) for inserting and removing the lens into the housing portion, the inner surface of the housing portion is It is covered with a first flexible laminated resin film (7). Moreover, in order to cover an opening part and to maintain a sealing state in a cover body, the surrounding wall part (4) is provided so that it can fix to a container main body.

  The lens container (1) in FIG. 1 is provided with two lens housing portions (3), but two containers having one housing portion may be prepared. The shape of the opening (5) is circular, but it may be a quadrangle, an ellipse, a semi-elliptical, a teardrop, or the like. Various shapes can be employed, such as a depression having a gentle slope in one direction, a depression having a trapezoidal cross section in the vertical direction, and a depression having a convex spherical surface at the center. The three-dimensional shape of the housing portion in the present invention is such that the lens is completely housed in the housing portion, is not subjected to a load that deforms during storage, and the lens is not damaged during removal or storage. If it is, it is not limited to a specific shape.

  In FIG. 1, the flexible resin film (7) is shown in a state of covering the container main body (2) and the accommodating part (3), but only the top surface (8) including the accommodating part or the inner surface of the accommodating part It may be one that only covers the surface. This is because the extent of covering other than the inner surface of the housing portion may be selected as appropriate in consideration of the manufacturing process and cost.

  FIG. 2 shows an example of a method for forming the lens container (1). First, a base (10) is prepared, in which a flexible laminated resin film (7), which is detachably laminated for each single layer, is bonded to a resin plate (11). A part of the flexible laminated resin film is not laminated, but this part is used for the grip portion (9) (FIG. 2 (I)). The material of the container body, lid, etc. is not particularly limited as long as the shape of the lens container can be maintained. For example, a conventionally known material such as polypropylene, polyethylene, polystyrene, vinyl chloride, polyethylene terephthalate can be used. it can. FIG. 2 (II) is a side view of the base (10). A flexible resin film (7) is fixed on the upper side of the flat resin plate (11), and is accommodated after vacuum forming. A part (3) etc. will be formed. When the substrate of the drawing is heated to a predetermined temperature and then compressed from above and below to give a three-dimensional shape and cut, a lens container (1) shown in FIG. 2 (III) is formed. As the molding method, a known method such as compression molding, vacuum molding, or pressure forming can be employed. Note that FIG. 2 (III) is a view as seen obliquely from above. In this example, the container main body, the accommodating portion, and the lid are integrally formed, but each portion may be separate. In addition, in the flexible laminated resin film of the container of FIG. 2 (III), two perforations (14) are provided from both ends of the grip portion (9) attached to the container body (2) to the end of the lid. Therefore, the flexible laminated resin film can be peeled for each single layer from the grip portion (9) along the perforation.

  For example, FIG. 3 illustrates a case where the container main body (12) and the lid (16) are integrated, and the accommodating portion (13) is prepared separately. Although the entire storage portion is shown in a state in which a flexible resin film (17) is laminated, it may be one that covers only the concave surface. Moreover, although the container main body (12) has the insertion hole (15) for inserting the accommodating part (13) from the top, the lens accommodating part may be formed instead of the fitting hole. The container shown in FIG. 3 can be discarded continuously only in the container, and the container main body that is not in direct contact with the lens can be used continuously. Moreover, if only the accommodating part is supplied individually or in a large number as a sales method, it is possible to reduce the economic burden for the customer. In addition, the lid body and the housing portion are integrated, and the container body is separate from the container body, or the container body and the lid body are not connected to the left and right as shown in the figure but can be connected to the front and rear.

  FIG. 4 illustrates a case where the container body (22), the lid body (26), and the accommodating portion (23) are prepared separately. The container body (22) has a hollow cylinder (25) into which the accommodating portion (23) can be fitted from above. And the cover body (26) has a side wall part (24) so that it can be slid from the side so that the top | upper surface (28) of a container main body (22) may be covered, and an accommodation space can be sealed. Although it is comprised so that two accommodating parts may be covered with one cover body, it is also possible to cover right and left accommodating parts with a separate lid body. Further, for example, a convex portion may be provided on the lid body, and a concave portion may be provided on the container body so that the lid body engages at a predetermined position when sliding. Although the number of parts increases compared to the example shown in FIG. 3, each resin product can be combined, so for example, by preparing different types of colors and patterns for each part, the part can be selected according to customer preference Therefore, a container excellent in fashionability can be provided.

  The flexible laminated resin film (7) is formed by a known laminating technique such as a co-extrusion method, a co-extrusion laminating method, an extrusion laminating method, or a dry laminating method, which is a general laminating method for resin films. For example, when laminating molten polyethylene between polypropylene films, lamination is performed by an extrusion laminating method, etc., with a polyethylene layer (tenths of μm thick) sandwiched between polypropylene layers (tenths of μm thick). Let Adjusting the melting temperature and lamination conditions, etc., making use of the poor compatibility between different resins of polypropylene and polyethylene, weakening the bond strength at the interface, and forming the flexible laminated resin film so that it can be peeled with a weak force . Moreover, a release agent is apply | coated to a part of polypropylene film, it is set as the state by which a polypropylene film is not bonded together, and it uses for a holding part (9). When forming a 5-layer flexible laminated resin film, 5 sheets of polyethylene are extruded and laminated between 6 polypropylene films, so the front and back surfaces of the flexible laminated resin film are both polypropylene films. Covered with. When a flexible laminated resin film with a polypropylene surface is fixed to a polypropylene sheet to form a substrate, the compatibility is excellent because of the same resin, and the bond strength at the interface is strongly fixed. The last flexible laminated resin film is a resin plate. It becomes difficult to peel off. A strong adhesive may be used to make it more difficult to peel off during fixation. Although the example which comprises a flexible laminated resin film with a polypropylene and polyethylene was shown, the combination of conventionally well-known materials, such as a polystyrene, a polyvinyl chloride, an ABS resin, and a polyethylene terephthalate, can be used. In addition, the flexible laminated resin film (7) is formed by laminating an adhesive such as a urethane type between polypropylene films. A part of the polypropylene film is coated with a release agent so that the polypropylene films are not bonded to each other and used for the grip portion (9). It is desirable that this adhesive adheres to the film on the peeled side when the flexible laminated resin film is peeled off, and does not remain on the surface newly appearing in the accommodating portion or the like. Even if it remains on the lens, it does not adhere to the preservation solution or the lens during use, and the adhesive itself is safe and does not adversely affect the lens user.

  These resin films are laminated so that each layer can be peeled. In order to facilitate this peeling operation, it is preferable that a gripping portion is provided. FIG. 5 shows several examples in which only the grip portion is enlarged. The grip portion is formed at the end of the resin film. It is preferable that the resin films in the gripping portion are not bonded to each other or the adhesive force is hardly applied.

  2-15 are preferable, as for the number of lamination | stacking of a flexible laminated resin film, 3-10 are more preferable, and 3-7 are the most preferable. 1 is almost meaningless, and 20 or more is because the curvature of the concave portion is greatly different between the uppermost layer and the lowermost layer, and there is anxiety in taking out the lens, and the amount of the storage solution is reduced. The thickness of the flexible laminated resin film is 5 to 80 μm, preferably 10 to 70 μm, and most preferably 20 to 60 μm. If it is thinner than 5 μm, it is very easy to break when it is peeled off, and if it is thicker than 80 μm, the flexibility is lowered and it becomes difficult to peel off, or the body may be deformed at the time of peeling.

  Moreover, in order to manufacture the base | substrate (10) illustrated in FIG. 2, the surface of the polypropylene sheet (several hundred micrometers thickness) is activated by corona discharge treatment etc., for example, The laminated resin film obtained as mentioned above These may be laminated by a dry laminating method or the like. Needless to say, the materials, thicknesses, lamination methods, and the like used here are merely examples and may be appropriately selected with various variations.

  If the flexible laminated resin film of the container of FIG. 2 (III) is peeled from the grip portion (9) along the perforation, the height of the portion is lowered, and the sealing performance when the lid is closed may be lowered. is there. In order to cope with this, it is also effective to make the peeling part thinner or to add a compensation part and to provide a sealing property maintaining means.

  The adhesive strength between the layers of the flexible laminated resin film of the present invention thus produced is measured as peel strength. Specifically, the peel strength can be measured by the following procedure using a tensile tester. (1) First, a molded article of an accommodating portion (or lid) on which a flexible resin film to be measured is laminated is prepared. (2) The first layer of the resin film is peeled to such an extent that it can be fixed to the movable side gripping tool of the measuring device, and the peeled portion is fixed. (3) The part that has been peeled off and remains is fixed to the other grip (fixed side) of the measuring device. (4) The movable side gripping tool to which the first layer is fixed is separated at a speed of 100 mm / min, and the load at that time is measured with a load cell.

  The peel strength of the flexible laminated resin film (17) including the accommodating portion (13) formed into a shape as shown in FIG. 3 was measured according to the measurement method.

  A typical example of the measurement result is shown in FIG. The upper diagram of FIG. 6 shows the change in peel strength when the peel strength (gf) is on the vertical axis and the peel site (mm) is on the horizontal axis. Further, the lower diagram of FIG. 6 schematically shows the positional relationship of the peeling site. 6 starts peeling from the left end of the top surface (18) of the housing part (13) of FIG. 3, and the resin film on the inner surface of the first housing part has been peeled off, and the next housing part is peeled off. It shows the intensity change up to the front. From this figure, it can be seen that the peel strength is highest particularly before the housing portion is completely peeled off. Considering the positional relationship of the peeling site, the peeling operation can be performed with a constant force by adopting a shape that loosens the inclination of the inner surface of the containing part along the peeling direction from the deepest part in the containing part toward the opening end. It is possible.

  As a result of measuring the peel strength of the laminated resin film molded under various materials and conditions, the lens container of the present invention is laminated so that the single layer can be peeled off with a peel strength of 1 to 500 gf, preferably 10 to 400 gf. As a result, it was found that it would be easy for the user to handle. In the present invention, it is very important to periodically peel the resin film covering the housing portion before the lens housing portion becomes dirty. At this time, if the peel strength is higher than 500 gf, the operability for the user is impaired, and therefore, there is a possibility that the product is continuously used until the contamination can be confirmed. On the other hand, if the peel strength is weaker than 1 gf, it may be peeled off when not intended due to malfunction. Therefore, in the present invention, it is necessary to limit the peel strength to a predetermined range. It is because a user's compliance will be easy if it is the said range.

  As described above, it is desirable that the flexible laminated resin film on the inner surface of the lens housing portion of the present invention is periodically peeled daily, weekly, or monthly to make a new surface. Therefore, it is preferable that the remaining number of the resin film or the peeling time is displayed on each layer of the first flexible laminated resin film. Although such a display is not limited, it is generally displayed by letters, numbers, symbols, a combination thereof, or a combination of these and a color. In addition, it is arbitrary in which position of the flexible laminated resin film and how much size is displayed. For example, when a gripping part is provided, it can be displayed on the part, and may be displayed conspicuously at the center of the inner surface of the housing part.

  Furthermore, when using for a disposable lens, it is also possible to display so as to know the replacement time of the lens. If the flexible laminate resin film is peeled off at the same time as the lens replacement, the lens will be replaced periodically according to the release of the flexible laminate resin film. This is because it is possible to effectively avoid the situation where the user is worn.

  Since the flexible laminated resin film is composed of a plurality of sheets, it is more convenient for the user to recognize when the flexible laminated resin film is finished. This is because the container can be prepared in advance, which is the next storage unit. As a means for that, it is effective to display an indication that the use is finished when the last flexible laminated resin film is peeled off.

Moreover, a means for making it difficult to use continuously after the last flexible laminated resin film is peeled can be applied. This is because the user can always use a new container. As such means, for example, one or more through-holes are provided in the housing portion, and means for making it impossible to hold the lens storage solution or the last resin film cannot be completely peeled off (for example, For example, there may be a means for adhering so that about 30% of the resin film area remains adhered to the housing portion. Such means may be inconvenient to the user at first glance, but preventive measures are also required to continue wearing the lens safely. In addition, when providing a through hole, it is necessary to maintain visibility in a dark place of the user, and the shape is preferable because a rounded shape such as a triangle or a quadrangle is easier to see due to irregular reflection of light than the circle, and the area is Even when used incorrectly, it is 3 mm ² or more, preferably 8 mm ² or more, more preferably 12 mm ² or more, and most preferably 16 mm ² or more, where water leakage can be easily confirmed.

  Hereinafter, the present invention will be described more specifically.

(Production of contact lens housing part 1)
Molten polyethylene was poured between two polypropylene films having a thickness of about 30 μm, and the two films were bonded together by an extrusion laminating method. This is referred to as a laminated resin film 2P1E. Next, molten polyethylene was poured between the laminated resin film 2P1E and a polypropylene film having a thickness of about 30 μm, and these two kinds of films were bonded together by an extrusion laminating method. This is called a laminated resin film 3P2E. Further, molten polyethylene was poured between the laminated resin film 3P2E and a polypropylene film having a thickness of about 30 μm, and these two kinds of films were bonded together by an extrusion laminating method. This is called a flexible laminated resin film 4P3E. However, in the above process, the portion corresponding to the gripping portion was not bonded by applying a release agent to the polypropylene film and laminating it. Next, corona discharge was applied to a polypropylene sheet having a thickness of about 0.3 mm, an adhesive was applied, and the produced flexible laminated resin film 4P3E was bonded by a dry laminating method. Finally, the polypropylene sheet to which the flexible laminated resin film 4P3E is bonded is heated at about 140 ° C. for 30 seconds so as to have the shape of FIG. 2 (III), and by a molding method that combines vacuum and compression, A contact lens housing part 1 was manufactured.

(Production of contact lens housing part 2)
An adhesive was applied to a polypropylene film having a thickness of about 30 μm, and the same polypropylene film having a thickness of about 30 μm was bonded by a dry laminating method. This is called a laminated resin film 2P1G. Further, an adhesive was applied to the laminated resin film 2P1G, and a polypropylene film having a thickness of about 30 μm was bonded by a dry lamination method. This is called a laminated resin film 3P2G. An adhesive was applied to the laminated resin film 3P2G, and a polypropylene film having a thickness of about 30 μm was bonded by a dry lamination method. This is called a laminated resin film 4P3G. However, in the above process, the portion corresponding to the gripping portion was not bonded by applying a release agent to the polypropylene film and laminating it. Next, corona discharge was applied to a polypropylene sheet having a thickness of about 0.3 mm, an adhesive was applied, and the produced flexible laminated resin film 4P3G was bonded by a dry laminating method. Finally, the polypropylene sheet bonded with the flexible laminated resin film 4P3G is heated at about 140 ° C. for 30 seconds so as to be in the shape of FIG. 2 (III), and by a molding method combining vacuum and compression, A contact lens housing part 2 was produced.

(Peel strength of flexible laminated resin film)
Using the contact lens housing portions 1 and 2 manufactured in Examples 1 and 2, the peel strength between each layer of the flexible laminated resin film was measured. Using a tensile testing device (model number SV-201, manufactured by Imada Co., Ltd.), the gripping part of the first layer of the flexible laminated resin film is fixed to the movable side gripping tool of the measuring device, and the polypropylene sheet is gripped. The part was fixed to the fixed side gripping tool of the measuring device, the movable side gripping tool was separated at a speed of 100 mm / min, the load at that time was measured with a load cell, and the peel strength (gf) was obtained. FIG. 7 shows a test result using the contact lens housing portion 1 manufactured in Example 1. FIG. 8 shows the test results using the contact lens housing part 2 produced in Example 2. FIG. In all cases, the peel strength was in the range of 1 to 500 gf. In addition, although two peaks are recognized in FIGS. 7 and 8, this is considered to correspond to the range C in FIG.

  Furthermore, when the peelability of the flexible laminated resin films of the contact lens housing portions 1 and 2 manufactured in the same manner was confirmed by three persons, the flexible laminated resin film of the housing portion 1 could be peeled off, but the force was strong. I needed it. The flexible laminated resin film of the housing part 2 could be peeled off with a normal force.

(Comparative example)
In the same manner as in Example 1, a contact lens housing portion 3 was manufactured. However, the heating time at the time of molding was 45 seconds, 15 seconds longer than that of Example 1. Using this contact lens housing part 3, the peel strength was measured in the same manner as in Example 3. The peel strength was stronger than the maximum measurement limit of 2000 gf of the tensile test apparatus, and the flexible laminated resin film was broken during the tensile test. Further, the peelability of the flexible laminated resin film of the contact lens housing 3 manufactured in the same manner was confirmed by three persons. As a result, the flexible laminated resin film of the housing part 3 could not be peeled even with a strong force.

  In the contact lens container of the present invention, since the lens housing portion is covered with a flexible laminated resin film that can be easily peeled off, the film is removed before the housing portion becomes dirty, thereby providing a new surface. Can do. Therefore, it can function effectively against dirt and microbial contamination of the storage unit and the Acanthamoeba adhered to the storage unit, and can be used as a storage container having a novel structure that can be easily handled.

DESCRIPTION OF SYMBOLS 1 Lens container 2, 12, 22 Container main body 3, 13, 23 Lens accommodating part 5 Opening part 6, 16, 26 Cover body 7 Flexible laminated resin film 9 Grip part 15 Insertion hole 24 Side wall part

Claims (3)

A container body;
A contact lens housing;
A first flexible laminated resin film in which the material that covers at least the inner surface of the accommodating portion is polypropylene;
A lid for releasably sealing the contact lens in the housing portion;
Wherein the receiving portion coated with a first flexible laminate resin film, a structure in which the contact lens does not adsorb a structure having irregularities on the surface of the film,
A structure having a curvature radius of 9 mm or more on the inner surface of the film
A structure in which the shape of the inner surface of the film is an ellipse or a hyperbola ,
One or more structures,
The first flexible laminated resin film can be peeled for each single layer with a force of peel strength of 1 to 500 gf,
The number of laminated layers of the first flexible laminated resin film is 2-15, and the single-layer resin film is bonded with polyethylene or with an adhesive,
A non-laminated gripping part for peeling off the first flexible laminated resin film is formed at an end of the single-layer resin film,
As means for recognizing the end of use of the housing part, means in which one or more through holes are provided in the housing part,
The last first flexible laminated resin film is fixed to the container so that it cannot be completely peeled off,
One or more of the above means are provided, and a contact lens container. The contact lens container according to claim 1, wherein the through hole has a polygonal shape and an area of 3 mm ² or more. Contact lens container according to claim 1 or 2, wherein the receiving unit and the container body are separate.

that's all

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