JP2007143892A - Medical tray and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medical tray which enables a top material to be manually and easily separated from heat-sealed matter of a lid material and the medical tray, even if a heat-sealing condition employed for obtaining heat-sealing strength required for the sealing of the lid material and the medical tray is not changed, and a manufacturing method which enables the medical tray to be manufactured through simple steps. <P>SOLUTION: The medical tray and its manufacturing method are characterized as follows: the lid material for the medical tray and the medical tray are heat-sealed; at least a part of a heat-sealed part is not fully heat-sealed but partially heat-sealed; and the partially heat-sealed part has non-heat-sealed parts in a dotted pattern Z, a grid pattern, or line patterns X and Y. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a medical tray with a lid and a method for manufacturing the same.

  As a conventional technique for controlling the peel strength of heat seals between medical plastic members, it is made of a flexible plastic film and has a plurality of compartments individually containing infusions or infusions and drugs other than infusions. In a chemical solution bag having a weak seal portion formed by applying an easily peelable coating material on one or both inner surfaces of a film and then heat-sealing, the easily peelable coating material is on the inner surface side of the plastic film. A ring fluid bag characterized by being applied in a dot pattern is known (Patent Document 1).

JP-A-11-169432

The heat seal between a medical tray that contains medical auxiliary items such as cotton swabs, cotton wool, sheets, gauze, disinfectant, tweezers, etc. and the top material that is the lid of the tray, the top material seals the medical tray. However, the top material may not be easily peeled by hand from the medical tray with the lid material heat-sealed under such conditions. In order to solve this problem, if an easily peelable coating material is used to weaken the peel strength as in Patent Document 1, it is necessary to use an expensive easily peelable coating material, and a step of applying the material. A process different from the sealing process is required, which causes problems such as a complicated manufacturing process.
In the present invention, the top material is removed from the heat sealing material of the lid and the medical tray without changing the heat sealing conditions employed to obtain the heat seal strength necessary for sealing the lid and the medical tray. It is an object of the present invention to provide a medical tray that can be easily peeled by hand, and a manufacturing method that can manufacture the medical tray in a simple process.

  According to the present invention, the heat sealing part of the medical tray lid member and the medical tray are formed so that the heat fusion part and the non-heat fusion part are adjacent to each other, and the non-heat fusion part is partitioned by the heat fusion part. By providing a medical tray with a lid material characterized in that it is formed, it was possible to provide a medical tray that secured the sealing property and easy peel property of the top material that solved the above technical problem .

  As an aspect of the structure of the heat seal portion in which the heat fusion portion and the non-heat fusion portion are formed adjacent to each other, and the non-heat fusion portion is defined by the heat fusion portion, A structure in which the non-fused portion is closed by the heat-sealed portion during heat sealing is preferable. Examples of such an aspect (structure) include a structure (sea island structure) of a heat seal portion in which non-fused portions 21 as shown in FIG. 9 are present in a dot shape in the heat seal portion. The dot-like non-fused part (island part) 21 of the heat seal part is of a structure surrounded and closed by a fused part (sea part) 22 during heat sealing. The medical tray with a lid material having the heat seal portion of this embodiment has a structure in which the non-fused portion (island portion) 21 is surrounded and closed by the fused portion (sea portion) 22, and thus the non-fused portion 21. Is preferable because it can be sterilized and kept aseptic as compared with those not confined by the fused portion 22. Further, the independent dot-like non-heat-sealed portion 21 that is present uniformly over the entire surface of the heat seal portion has no variation in adhesive strength depending on the portion, and further, the heat seal portion is peeled off. In addition, it is preferable because an adhesive strength capable of easily peeling the lid material is obtained at the time of peeling. Homogeneous over the entire surface of the heat seal portion does not mean only an absolutely homogeneous material, but the heat seal portion does not peel off, and the adhesive strength can peel the lid easily during peeling. As long as the purpose of obtaining can be achieved, there may be some variation.

  The thermal fusion part and the non-thermal fusion part are formed adjacent to each other, and the non-thermal fusion part is defined by a thermal fusion part, and the non-fusion part is thermally fused during heat sealing. As another aspect of the structure closed by the portion, for example, a heat seal portion as shown in FIG. 10 forms a lattice pattern with the heat fusion portion 22 and the non-heat fusion portion 21, and the non-heat fusion portion. Examples include a pattern having a shape in which 21 is surrounded by a heat-sealed portion 22 having a lattice-shaped crosspiece to form a confined structure. Since the medical tray of this embodiment also forms a closed structure in which the non-heat-sealed portion 21 is partitioned by a lattice-shaped crosspiece that is the heat-fused portion 22, a dot-like structure is formed on the heat-sealed portion. As in the case of the medical tray in which the non-fused portion is formed, the non-fused portion 21 can be sterilized and maintained aseptically as compared with the case where the non-fused portion 21 is not confined by the fused portion 22.

The medical tray of each of the above aspects is formed by, for example, joining a top material that is a lid material and a heat seal portion of the medical tray, and a thermal fusion part and a non-thermal fusion part are adjacent to the joint part, and dots The joint portion is heat-sealed by a mold having a pattern shape on the surface, which can form a structure in which the shape non-heat-sealed portion is surrounded and enclosed by the heat-sealed portion, or a top material that is a lid material Joining the heat-sealed portion of a medical tray, a heat-bonded portion and a non-heat-bonded portion are adjacent to the bonded portion, and the cross-shaped pattern of the non-heat-bonded portion is a heat-fused portion. The joint portion can be manufactured by heat-sealing using a mold having a pattern shape on the surface, which can be formed into a closed structure partitioned by the portion.
However, the pattern shape to be formed on the mold surface does not need to be formed in a portion corresponding to all the heat seal portions of the top material and the medical tray, and it is difficult to ensure peelability by whole surface heat fusion. You may form only in the part corresponded to the heat seal part which becomes.

As the top material and the medical tray used in the present invention, those conventionally used can be used, but as described above, the peel strength of the lid material is too strong in the normal full surface heat seal as described above, and easy peel. Particularly suitable for the case of using a top material in which the property is not secured, and examples of the medical tray include the following medical tray (Japanese Patent Application No. 2005-74944) previously filed by the present applicant. The medical tray invented in the Japanese Patent Application No. 2005-74944 can store at least two types of rod-shaped medical auxiliary items having different long axis lengths, and stores the medical auxiliary items divided by a plurality of partition walls. A tray for storing medical auxiliary products stored in a section, which satisfies the following requirements (1) to (4).
(1) The opening can be sealed with a sterilizable sheet, and the sterilizable sheet with the opening sealed can be opened when the lower chamber is the lower chamber and the opposite side is the upper chamber. And the lower chamber is partitioned into a plurality of chambers by partition walls.
(2) The lower chamber has a rod-shaped medical auxiliary product having the smallest long axis among the rod-shaped medical auxiliary items stored in the tray, and the upper chamber is placed on the upper surface of the partition wall of the lower compartment. It must be able to be accommodated in a direction parallel to the partition wall that partitions the lower chamber.
(3) At least one of the lower compartments and the upper compartment have a rod-like medical aid having the longest long axis among the rod-like medical aids stored in the tray, and the corners of the lower compartment. It must be capable of being placed and accommodated across the diagonal direction of the corners of the upper chamber.
(4) The partition wall of the upper chamber and the lower chamber can hold the arrangement state of the rod-shaped medical aid of (3) above by placing the handle portion of the largest-sized rod-shaped medical aid on the upper surface of the partition wall. It has a notch part.

In the present invention, the peel strength of the heat seal part between the top material and the medical tray was measured as follows.
As the medical tray, the one of Japanese Patent Application No. 2005-74944 shown in FIG. 1 (made of polypropylene) is used, and the sterilized paper of the top material (made by Kojin Co., Ltd.) on the edge 1 (thickness 0.45 mm) of the tray. Was heat sealed at 115 ° C. and 120 ° C. with a mold. As the mold, a mold having the following processed part was used, and heat seal parts of 1A, 1B, 1C and 1D were heat-sealed.
(1) The mold surface for heat sealing the 1A portion is not processed.
(2) Dot processing (φ1.7 mm, aperture ratio 28.4%, effective seal area 71.6%) on the die surface for heat sealing the 1B portion.
(3) One line processing of the mold surface for heat sealing the 1D portion (width 2.4, opening ratio 30%, effective seal area 70%).
(4) Line processing of the mold surface for heat sealing the 1C portion (width 1.2 mm × 2, opening ratio 30%, effective seal area 70%).
In addition to measuring the peel strength of the tray heat-sealed with the top material, the peel strength of the tray further heat sterilized at 115 ° C. and 120 ° C. was also measured.
In addition, the said aperture ratio refers to the area ratio of the non-fusion | fusion part (the remainder is the sealing area which is a fusion | fusion part) with respect to the total area of a heat seal part.

  The effective seal area formed on the mold surface employed in the present invention is usually about 55 to 85% (opening ratio of about 45 to 15%), preferably 60 to 75 in the heat seal portion also in the case of dot processing and line processing. % (Opening ratio of about 40 to 25%) can be formed, and the mold used for the peel strength test is as effective as 71.6% and 70% effective seal area. The seal area was used. However, the preferable numerical value of the effective seal area or the aperture ratio is changed according to other requirements, for example, the type or material of the medical tray and the top material, and does not indicate the absolute value of the preferable range. .

  From the edge 1 of the medical tray (before heat sterilization) to which the top material is heat-sealed, the width of the edge 1 is about 30 mm (including the top material and the heat-sealed portion 7 mm of the edge 1) × the length in the side direction Cut 5 pieces (n = 5) from the 1A, 1B, 1C and 1D parts of the edge 1 and cut out 5 pieces (n = 5) of the test piece for peeling test with a thickness of 10 mm. The peel strength was measured using a SHIMPO digital force gauge FGN-50 (manufactured by Nidec Shinpo Co., Ltd .: trade name) using the peel strength of the piece as a peel strength tester. In the measurement, the top material portion of the test piece was attached to the SHIMPO digital force gauge FGN-50, and a peel test was conducted. The results are shown in Tables 1 and 2 below. In addition, the measurement result of the preceding table 1 shows what performed only heat sealing, and the measurement result of the preceding table 2 shows the result after performing ethylene oxide gas sterilization in addition to the said heat sealing.

前表１および２のＡＶＥは平均値を意味し、Ｓ．Ｄ．は標準偏差を意味する。前記表１および２に示した数値の単位はN／１０ｍｍである。

In Tables 1 and 2, AVE means an average value. D. Means standard deviation. The unit of the numerical values shown in Tables 1 and 2 is N / 10 mm.

From the results of Tables 1 and 2, the following was found.
(1) At each sealing temperature, peel strength before and after sterilization is 1B (dot processed surface), 1D (one line) and 1C (two lines) rather than 1A (control: full surface heat seal). The trend was low and similar.
(2) Considering the aperture ratio (effective seal area), the original seal strength is 1A>1B> 1C = 1D (effective seal area: 1A: 100%> 1B: 71.6%)> 1C70% = 1B70%) Although it is predicted that 1A>1C> 1B≈1D in actual measurement. This result shows that 1C (dot processed surface), 1D (single line) and 1C (two lines) have a high peel strength of 1C (two lines) before and after sterilization at each sealing temperature. It was observed. In the case of single line processing and double line processing, the peeling direction had an influence on the peel strength. Therefore, when peeling the peel material from the medical tray, the peeling direction is not only one direction but also the peeling force is applied to the seal portion in parallel, vertical, and oblique directions. It is considered that the dot-processed seal portion that is hardly affected by the peeling direction is suitable for adjusting the peeling strength between the medical tray and the top material. Also, there was no change in appearance before and after sterilization with ethylene oxide gas.

  In the medical tray with a lid material of the present invention, the heat seal portion with the lid material is adjacent to the heat fusion portion and the non-heat fusion portion, and the non-heat fusion portion is partitioned and confined by the heat fusion portion. If the non-fused part is sterilized and kept sterile as compared to a structure that is not confined and confined by the heat-fused part, and the heat-sealed part is entirely heat-sealed. Even when it is difficult to peel off the lid from the medical tray in which the lid is heat-sealed, it is possible to ensure the easy peel property of the lid while securing the sealing property between the top material and the medical tray. Therefore, in the present invention, in order to obtain the heat seal strength necessary for sealing, the heat using the top material that can easily peel the heat-sealed product by hand without changing the sealing conditions of the top material. It was possible to provide a sealed product and a production method capable of producing the heat sealed product by a simple process.

Composition of medical trays for storing medical aids

  In the medical tray of this embodiment, after storing medical auxiliary items in the medical tray shown in FIG. 1, the lid material of the tray and the portions 1A, 1B, 1C and 1D of the edge 1 are joined. By heat-sealing the joint portion, a circular or square dot-shaped non-heat-sealed portion that exists as an island structure closed by a heat-sealed portion that is a sea structure is formed in the joint portion. (Figs. 2 and 9). In this embodiment, a regular square shape is adopted as the shape of the dot-like non-thermally fused portion, but the shape of the dot-like thermally fused portion is not limited to a circular shape or a rectangular shape. There may be other arbitrary shapes. In addition, the structure of the heat seal portion is not limited to the structure in which the non-heat fusion portion is confined in the dot shape in the heat fusion portion as described above, and the heat fusion portion and the non-heat fusion portion are adjacent to each other. If the heat fusion part is confined by the heat fusion part, for example, as shown in FIG. 10, the non-heat fusion part is confined by a lattice-shaped beam forming the heat fusion part. For example, the non-heat-sealed portion can achieve the same effect as that of the dot shape.

  The tray of this embodiment is a rectangular container, which is partitioned by a partition wall 5 to form a lower chamber 4 on the unsealing side 10 and an upper chamber 2 on the opposite side. Further, the lower chamber 4 is formed by partition walls 11 and 12. It is divided into three chambers: a left chamber 6, a central chamber 7, and a right chamber 8. Further, the partition walls 6, 7 and 8 of the lower chamber hold the head of the smallest size swab (the swab whose length of the handle is about 4 inches) stored in the main tray to the right chamber 8, and The partition walls of the central chamber 7 and the left chamber 6 are preferably set at a position where the handle can be held while balancing.

  The partition walls 5 of the upper chamber 2 and the lower chamber 4 have, on their upper surface portions, a cotton swab having the longest axis length among the swabs that can be stored in the tray (the length of the handle portion is about 6 inches). Cotton swab) diagonally between the lower left corner A of the left ventricle (formation of the rounded portion) and the upper right corner D of the upper chamber D (formation of the rounded portion), or the lower right corner of the right ventricle B (formation of the rounded portion) and the upper left of the upper chamber A cutout portion (hereinafter referred to as a large-sized cotton swab holding cut) that is placed and accommodated across the diagonal direction of the corner portion (R-shaped portion formation) C, and in which case the handle portion is placed to hold the arrangement state. 13 and 14). Further, the notch depths of the large-sized swab holding notch parts 13 and 14 are such that the bottom surface part thereof and the upper surface parts of the partition walls 11 and 12 of the lower chamber 4 are the same plane, and the height of the partition wall 5 is The height of the upper peripheral edge of the tray is the same or slightly lower. In addition, the corner | angular part at the time of storing and arrange | positioning the cotton swab diagonally in this invention points out area | regions, such as a corner part and its vicinity, and this area | region forms the round part in the whole or one part. It is preferable. Further, the left-side cut surface 19 of the large-sized swab holding cut-out portion 13 and the right-side cut-out surface 20 of the right-side cut-out portion 14 are inclined at an angle similar to or close to the diagonal angle of the arranged swab. The provided one is preferable because the swab can be easily stored and the stored swab can be stably held.

  4 and 5 show a mode in which a cotton swab 17 having a longest axis length (a cotton swab having a handle portion of about 6 inches) is stored among the cotton swabs stored in the tray of the present invention. . FIG. 4 shows a mode in which the handle 18 of the cotton swab 17 is stored leftward with respect to the partition wall 5, and FIG. 5 shows a mode in which the cotton swab is stored with the handle 18 in the right direction with respect to the partition wall 5. As described above, the tray of the present invention can be arbitrarily selected between right and left as the cotton swab storage mode, so that it can be arranged so that a right-handed or left-handed user can easily take it out, and a treatment using the auxiliary tool. Depending on the type or method, the right direction and the left direction can be arbitrarily selected so that the auxiliary tool can be easily taken out. 4 and 5 have the large-sized cotton swab holding cutouts 13 and 14, but the cutouts 13 and 14 may be in only one of them.

  FIGS. 6 and 7 show a state in which a cotton swab 17 '(a cotton swab having a handle having a length of about 5 inches) having an intermediate long axis among the cotton swabs housed in the tray of the present invention is housed. Show. On the upper surface of the partition wall 5 of the upper chamber 2 and the lower chamber 4, the cotton swab 17 ′ is adjacent to the central chamber 12, and the lower left corner (Earl portion formation) E of the central chamber 12 and the upper right corner of the upper chamber ( Arranged in the diagonal direction of the rounded portion D) or in the diagonal direction of the lower right corner portion (rounded portion formed) F of the central chamber and the upper left corner portion (formed rounded portion) C of the upper chamber. The cotton swab 17 ′ has a notch portion 15 (hereinafter referred to as a medium-sized swab holding notch portion) on which the handle portion of the swab 17 ′ is placed and can hold the arrangement state. Further, the notch depth of the medium-sized cotton swab holding notch 15 is such that the bottom surface thereof and the upper surfaces of the partition walls 11 and 12 of the lower chamber 4 are in the same plane. Also, when storing a medium-sized swab, the right direction and the left direction can be arbitrarily selected as in the case of a large-sized swab, so that the same effect as that of the large-sized swab can be obtained.

  FIG. 8 shows an embodiment in which a cotton swab 17 ″ having the shortest long axis among the cotton swabs accommodated in the tray of the present invention (a cotton swab having a handle having a length of about 4 inches) is accommodated. The lower chamber 4 is configured such that the small-sized cotton swabs are arranged in parallel to the partition wall 5 over the upper surface portions of the partition walls 11 and 12 of the lower partition chamber and can be accommodated. Since the height 16 of the upper surface of the partition wall 5 and the height of the upper peripheral edge 3 of the tray are the same or the former is slightly lower than the latter, the small cotton swab 17 ″ is located in the lower chamber 4. It can be stably stored without moving in the direction of the chamber 2.

  The tray of the present invention is improved in the peelability after heat sealing of the lid material which is a top material and the medical tray, and as described above, the rod-shaped medical auxiliary product has a large length in the major axis direction, Not only can it accommodate both medium and small size types, but any type of swab is always placed and stored on top of other medical aids stored in the tray . In addition, since the grip side portion of the long shaft portion of the rod-shaped medical auxiliary product, for example, the grip side portion of the handle portion of the cotton swab, is present on the opening side of the tray, the other medical auxiliary products can be medicalized by first removing the cotton swab. Easy to remove according to procedure. Furthermore, even when large medical aids such as already sterilized sheets and gauze are stored in the upper chamber 2 of the tray of the present invention, the long axis portion of the rod-like medical aid is gripped. Since the gripping side portion of the handle portion of the cotton swab, for example, is present on the opening side of the tray, a large-scale medical device such as the sterilized sheets, gauze, etc. when gripping the rod-shaped medical auxiliary item and removing it from the tray The tray user's hand will not be contaminated with the auxiliary equipment. Further, the small-sized swabs stored in the lower chamber 4 are taken out because the lower chamber 4 and the upper chamber 2 are partitioned by the partition wall 5, so that the tray user can use the sterilized sheets, gauze, etc. This can be done easily without touching large medical aids. In addition, since at least one kind of rod-shaped medical aid can be arbitrarily stored in the tray diagonally rightward or leftward, as described above, it can be arranged so that a right-handed or left-handed user can easily take it out. In addition, the right direction and the left direction can be arbitrarily selected so that the auxiliary tool can be easily taken out depending on the type or method of the treatment using the auxiliary tool.

  In the tray of the above embodiment, the rod-shaped medical auxiliary items can be accommodated in large, medium and small lengths in the long axis direction, but the long axis as shown in FIGS. Two types of large and small directional lengths may be stored. The tray size of the present invention is not particularly limited as long as the object of the present invention as described above can be achieved. For example, the tray size is about 105 to 165 mm in width and about 65 to 105 mm in length. Can be mentioned.

1 is a diagram illustrating a configuration of a medical tray used in Example 1. FIG. It is a figure which shows the structure of the medical tray used for a peeling strength test. It is a figure which shows the notch test piece used for a peeling strength test. A tray in which a cotton swab with a large handle is stored in the tray of Fig. 1 facing right. A tray in which a cotton swab with a large handle is stored leftward in the tray of FIG. A tray in which a cotton swab with an intermediate handle is stored in the tray of Fig. 1 facing right. A tray in which a cotton swab with an intermediate handle size is stored leftward in the tray of FIG. A tray containing a cotton swab with a small handle size in the tray of FIG. It is a figure which shows the dot-like structure of a cut-out heat seal part. It is a figure which shows the lattice structure of a cut-out heat seal part.

Explanation of symbols

1 Edge where sterilizable top material is heat sealed.
1A A heat seal portion between the edge portion 1 and the top material by an unprocessed portion of the mold.
1B A heat seal portion between the edge portion 1 and the top material by a line-shaped concave portion (one line) of the mold.
1C A heat seal part between the edge part 1 and the top material by the line-shaped concave part (two lines) of the mold.
1D A heat seal portion between the edge portion 1 and the top material formed by a dot recessed portion of the mold.
2 Upper chamber.
3 Upper edge of tray.
4 Lower chamber.
5 division wall.
6 Left ventricle.
7 Central room.
8 Right ventricle.
9 Start of peeling of sterilizable sheet.
10 Unsealed side.
11 Compartment wall.
12 partition wall 13 Large size cotton swab holding cutout.
14 Large size swab holding cutout.
15 Medium size swab retaining cutout.
16 Upper surface portion of the partition wall 5.
17 Cotton swab with a large handle.
17 'Cotton swab with a medium handle size.
A cotton swab with a small 17 '' handle.
18 Cotton swab handle.
19 Left side notch surface of large size swab holding notch 13.
20 The right notch surface of the large size cotton swab retaining notch 14.
21 Non-heat-sealed part of the heat seal part.
22 Heat-sealed part of the heat seal part.
A Lower left corner of left ventricle 6.
B Lower right corner of right ventricle 6.
C Upper left corner of upper chamber 2
D Upper right corner of upper chamber 2
E Lower left corner of central chamber 7.
F Lower right corner of central chamber 7.
X Non-sealed part of top material and medical tray (one line).
Y Non-sealed part of top material and medical tray (2 lines).
Z Top material and non-sealed part of medical tray (dot-like part).
W Cut peel strength test piece.
Q Cut-off peel strength test piece.
R Cut-off peel strength test piece.
S Cut-off peel strength test piece.

Claims (6)

The medical tray cover material and the heat seal portion of the medical tray are formed such that the heat fusion portion and the non-heat fusion portion are adjacent to each other, and the non-heat fusion portion is partitioned by the heat fusion portion. A medical tray with a lid. 2. The medical tray with a lid material according to claim 1, wherein the non-fused portion has a structure closed by the heat-fused portion. 3. The medical tray with a lid material according to claim 1, wherein the non-fused portion is present in a dot shape in the heat seal portion. 3. The heat seal portion is formed with a lattice pattern by the heat fusion portion and the non-heat fusion portion, and the heat fusion portion is formed by a lattice-shaped crosspiece. A medical tray with a lid as described in 1. A structure in which a heat seal part and a non-heat fusion part are adjacent to each other and a heat seal part of the medical tray lid material and the heat seal part of the medical tray are separated by the heat fusion part and thermally fused. The medical tray according to claim 1, wherein the medical tray is formed using a mold for forming a metal. The lid of the medical tray and the heat seal part of the medical tray are joined, and the thermal fusion part and the non-thermal fusion part are adjacent to each other by thermal fusion, and the non-thermal fusion part is thermally fused. A method for manufacturing a medical tray with a lid material, wherein the joining portion is heat-sealed using a mold that forms a heat-sealed portion partitioned by a landing portion.

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