JP7160629B2 - Cylindrical body and cartridge - Google Patents

Description

TECHNICAL FIELD The present invention relates to a tubular body and a cartridge having a water immersion prevention function.

As a method for crushing brittle substances such as rocks, bedrock, concrete, etc., after drilling holes in these brittle substances, a cartridge containing a non-explosive crushing composition, etc. is loaded, and after loading the filling, protective measures, etc. It is commonly used to detonate and crush by remote control from a safe position. The non-explosive-crushing composition is one that generates thermal decomposition gas such as steam gas and carbon dioxide gas by thermite reaction caused by ignition combustion, for example.

A cartridge used in such a crushing method is composed of, for example, a bottomed cylinder body with one end open and a cap attached to one end of the cylinder body. Therefore, at a crushing site where groundwater flows out from the drilled hole, there is a problem that the loaded cartridge is non-explosive because the groundwater seeps into the inside of the cartridge from between the cylinder body and the cap.

Therefore, in the cartridge having the above-described configuration, for example, after attaching the cap to the cylinder body, a tape for preventing water intrusion (hereinafter referred to as waterproof tape) is applied over the entire circumference of the cylinder body for curing. Prevents water from entering the cylinder. In addition to this, a method of applying an adhesive or the like to the inside of the cap or the region where the cap is fitted on the outer peripheral surface of the cylinder body to fix the cap to the cylinder body is also conceivable.

JP-A-8-61897

For example, when considering the use of waterproof tape to prevent water from entering the cartridge, the task of attaching the waterproof tape is performed manually, and therefore the task of attaching the waterproof tape takes a long time. In addition to this, there is a problem that unevenness may occur in the attached waterproof tape, and water may enter through gaps generated in the attached prevention tape, causing the cartridge to be flooded.

In addition, when it is considered to fix the cylinder body and the cap using an adhesive agent or the like, there is a problem that it takes a long time to perform the work, as in the case of preventing water intrusion with a waterproof tape. In addition, if the adhesive is not applied properly, water may enter through the gap between the inner peripheral surface of the cap and the outer peripheral surface of the fitting portion of the cylinder body. There is Further, in this case, it is necessary to check the state of application of the adhesive and the state of fixation between the cylinder body and the cap by an operator or an inspection device.

As a method for preventing water from entering the cartridge, in addition to the two methods described above, a waterproof member such as an O-ring may be placed on either the cylinder body or the cap, and the cap may be attached to the cylinder body. It is also conceivable to sandwich the O-ring between the cap and the cartridge when installed. However, when using a waterproof member such as an O-ring, it is necessary to provide a groove for holding the O-ring in at least one of the cylinder body and the cap. Further, depending on the structure of the cartridge after the cartridge is assembled, it may be necessary to fix the cap to the barrel body with bolts in order to keep the O-ring sandwiched. In this way, when a waterproof member such as an O-ring is used to prevent water from entering the inside of the cartridge, it is necessary to change the structure (design change) of the cartridge itself, resulting in an increase in the manufacturing cost of the cartridge. There is a problem that

SUMMARY OF THE INVENTION The present invention has been made in order to solve such a problem, and provides a technique capable of preventing water from entering the inside of a cylinder body with a simple structure without changing the existing structure. It is in.

In order to solve the above-described problems, the tubular body of the present invention is provided with a fitting portion having a reduced diameter on the tip end side at one end side in the axial direction, a tubular main body in which the tip of the fitting portion is open; It has a cylindrical wall portion into which the fitting portion is inserted, and the end portion of the cylindrical wall portion opposite to the end portion into which the fitting portion is inserted is closed, so that the fitting portion can be connected to the fitting portion. a lid that shields the opening of the fitting portion and forms a space outside the diameter-reduced portion provided on the distal end side of the fitting portion at the time of fitting of the lid and the fitting portion; a water absorbing member that is pressed against the inner side of the lid by the fitting portion at the same time, and is held in a state in which the outer peripheral edge portion located outside the diameter-reduced portion of the fitting portion enters the space; characterized by having

Further, in a cross section perpendicular to the axial direction of the cylindrical body, the water absorbing member is formed to have an area equal to or larger than an area of the internal space of the lid.

Further, the water absorbing member is characterized by containing a water absorbing polymer that gels when water is absorbed. Moreover, it is preferable that the water absorbing member is formed by laminating a plurality of polymer sheets composed of a water absorbing polymer layer and paper layers provided on the front side and the back side of the water absorbing polymer layer. The water absorbing member is characterized in that it expands into the space due to gelation caused by water absorption, and prevents water from entering through a gap formed between the fitting portion of the cylinder body and the lid.

In addition, locking projections are provided on either the outer peripheral surface of the fitting portion or the inner peripheral surface of the tubular wall portion of the lid, and the locking projections are provided on the other when the tubular body and the lid are fitted together. characterized by providing an engagement groove that engages with the

Further, the fitting portion has a tapered portion whose diameter is reduced toward the tip.

Further, the cartridge of the present invention comprises the tubular body described above, a non-explosive-crushing composition loaded inside the tubular body, and a holding portion provided on either the lid or the tubular body. and an igniter that is attached to the apparatus and causes a chemical reaction of the non-explosive crushing composition when ignited.

ADVANTAGE OF THE INVENTION According to this invention, even if it does not change the existing structure, it is possible to prevent water from entering the cylinder body with a simple configuration.

1 is a perspective view showing an example of a cartridge according to one embodiment of the present invention; FIG. 2 is an exploded perspective view of the cartridge shown in FIG. 1; FIG. (a) A cross-sectional view showing the vicinity of the fitting portion of the cylinder main body, (b) a cross-sectional view of the lid, and (c) a cross-sectional view of the water absorbing member. It is a figure which shows the manufacturing process of a cartridge. FIG. 2 is a cross-sectional view of a cartridge; It is a schematic diagram which shows the structure of a water pressure tester. FIG. 4 is a cross-sectional view of a cartridge having a barrel body without a taper;

A cartridge filled with a non-explosive-crushing composition will be described below as an example, but the cartridge is not limited to a cartridge as long as it has a function of preventing flooding.

The cartridge of the present embodiment is loaded in a brittle material such as rock, bedrock, concrete, etc. after piercing, and pyrolysis gas such as steam gas and carbon dioxide gas is generated by the thermite reaction of the non-explosive crushing composition loaded inside during ignition combustion. Generates and crushes brittle materials.

As shown in FIGS. 1 to 3, the cartridge 10 includes a barrel body 11 and a lid 12. As shown in FIGS. The cylinder main body 11 and the lid 12 are, for example, injection molded products using rigid polyethylene. In addition, the material of the cylinder main body 11 and the lid 12 need not be limited to rigid polyethylene.

The tube main body 11 is a member for containing the non-explosive-crushing composition, and is a bottomed tube-shaped member that is open at one end in the axial direction and closed at the other end. As an example, the cylindrical body 11 has a circular cross-sectional shape perpendicular to the axial direction. The cross-sectional shape of the cylinder body 11 perpendicular to the axial direction is not necessarily limited to a circular shape, and may be an elliptical shape, a polygonal shape such as a triangle or a square, a star shape, or any other suitable shape. In FIG. 2, the symbol L is attached to the axial direction.

The tube main body 11 has a fitting portion 15 on one open end side thereof, into which the lid 12 is fitted. The fitting portion 15 is set so that the outer diameter D1 is substantially the same as the inner diameter D5 of the lid 12 and is smaller than the outer diameter D2 of the other end side of the cylinder main body 11 . The fitting portion 15 has a tapered portion 16 at its tip, the outer diameter of which is reduced toward the tip in the axial direction of the tubular body 11 . By providing the tapered portion 16 at the tip of the fitting portion 15 , the lid 12 can be easily attached to the cylinder body 11 . The angle θ of the tapered portion 16 with respect to the axial direction of the cylinder body 11 is, for example, 28°. Here, the angle θ of the tapered portion with respect to the axial direction of the cylinder main body 11 is set to 28°, but it is preferably in the range of 15 to 60°, for example. Here, reference numeral 17 denotes an opening provided at the tip of the tapered portion 16 .

Although the tapered portion 16 is provided at the tip of the fitting portion 15, for example, the fitting portion 15 may have a cylindrical portion smaller than the outer diameter of the fitting portion 15 at the tip. There may be.

The fitting portion 15 has a plurality of locking projections 18 at predetermined angular intervals in the circumferential direction. The positions of the locking projections 18 in the axial direction of the cylinder body 11 are the same. These locking protrusions 18 are engaged with engagement grooves 23 provided on the inner peripheral surface of the lid 12 when the lid 12 is fitted to the cylinder body 11 . Although FIGS. 1 to 4 show four locking projections arranged at intervals of 90 degrees, the number of locking projections 18 and the arrangement intervals may be set as appropriate.

The lid 12 is a member fitted to the fitting portion 15 of the cylinder body 11 . The lid 12 includes a cylindrical wall portion 21 including a tapered portion 16 into which the fitting portion 15 is inserted, and one of both ends of the cylindrical wall portion 21 opposite to the one end side into which the fitting portion 15 is inserted. A shielding portion 22 is arranged and shields the opening 17 provided at the tip of the tapered portion 16 at least when the lid 12 is fitted to the cylinder body 11 .
The lid 12 has an engaging groove 23 on the inner peripheral surface of the cylindrical wall portion 21 over the entire circumference. When the lid 12 is fitted to the fitting portion 15 of the cylinder body 11 , the engaging groove 23 is engaged with the locking projection 18 provided on the outer peripheral surface of the fitting portion 15 . Since it is sufficient that the engagement groove 23 can be engaged with the locking projection 18 provided on the outer peripheral surface of the fitting portion 15, the engagement groove 23 is formed on the inner peripheral surface of the cylindrical wall portion 21 over the entire circumference. No need to set.

In this embodiment, the locking projection 18 is provided on the outer peripheral surface of the fitting portion 15 of the cylinder body 11 and the engagement groove 23 is provided on the inner peripheral surface of the cylindrical wall portion 21 of the lid 12 . It is also possible to provide an engaging groove on the outer peripheral surface of the fitting portion 15 and an engaging projection on the inner peripheral surface of the cylindrical wall portion 21 of the lid 12 .

The shielding portion 22 described above has a tubular holding portion 25 extending from the inner wall surface toward the opening side of the tubular wall portion 21 . The cylindrical holding part 25 holds an igniter 30 for causing a chemical reaction such as a thermite reaction in the non-explosive crushing composition loaded inside the cartridge 10 . Reference numeral 26 denotes an insertion opening into which the igniter 30 is inserted when the igniter 30 is attached to the tubular holding portion 25 .

In the present embodiment, a case where the cylindrical holding portion 25 that holds the igniter 30 is provided on the lid 12 is described, but the cylindrical holding portion 25 can also be provided on the cylindrical main body 11 .

A raised portion 27 is provided on the outer peripheral edge portion of the shielding portion 22 described above. A plurality of grooves 28 are provided on the raised portion 27 at predetermined intervals. A cable 31 pulled out from an igniter 30 held by the cylindrical holding portion 25 is inserted into the groove portion 28 . In FIG. 1, the case where the grooves 28 are provided at two locations on the raised portion 27 with an interval of 180° is described. It is also possible to provide three positions at intervals of °.

The water absorbing member 35 absorbs and gels water (groundwater) that enters through a gap between the cylinder body 11 and the lid 12 . This gelation expands the water-absorbed portion. The water absorbing member 35 has, for example, a disc shape with an open center. The opening 35a provided in the central portion is provided for inserting the cylindrical holding portion 25 of the lid 12. As shown in FIG. Therefore, if the lid 12 is not provided with the cylindrical holding portion 25, it is not necessary to provide the opening 35a.

Although illustration is omitted, the water absorbing member 35 has, as an example, a three-layer structure of a water absorbing polymer (high water absorbing resin) layer and paperboard layers arranged on the front side and the back side of the water absorbing polymer layer. It is a polymer sheet. The water-absorbent polymer used in the water-absorbent polymer layer is, for example, a polyacrylate-based, polysulfonate-based, maleic anhydride-based salt-based, polyacrylamide-based, polyvinyl alcohol-based, polyethylene oxide-based synthetic polymer-based polymer. . Also, instead of synthetic polymers, polyaspartate-based, polyglutamate-based, polyalginate-based, starch-based, and cellulose-based polymers may be used.

The water absorbing member 35 is pressed against the bottom surface of the cylinder body 11 when the cylinder body 11 and the lid 12 are fitted together, and the outer peripheral edge thereof is between the lid 12 and the tapered portion 16 (outside the tapered portion 16). is held in a state in which it enters a space 45 created in the space 45 (see FIG. 5). The water absorbing member 35 absorbs water (groundwater or the like) that has entered through a gap formed between the cylinder body 11 and the lid 12, for example. The water-absorbing member 35 prevents the water-absorbing polymer gelled and the gelled water-absorbing polymer reaching the space from entering the cylinder main body 11 through the opening 17. .

As mentioned above, the cartridge 10 is loaded with a non-explosive fragmentation composition. The non-explosive crushing composition is obtained by mixing, for example, a thermite agent composed of cupric oxide and aluminum with a gas generating agent, mixing the mixture with an organic binder if necessary, and granulating the mixture. Typical gas generants include, for example, potassium alum (potassium alum) or ammonium alum. The gas generating agent is not limited to potassium alum or ammonium alum, and can be a plastic powder of polycarbonate resin or polyacetal resin, or a carboxyl group-containing compound such as ammonium salt or metal salt (or neutralized product thereof). , biomass-based plastics, biodegradable resins such as petroleum plastics, and aliphatic polymers such as methacrylic resins, polypropylene resins, or methacrylic resins.

An example of dimensions of the cylinder body 11, the lid 12 and the water absorbing member 35 constituting the cartridge 10 described above is shown below. As shown in FIG. 3A, the outer diameter D1 of the fitting portion 15 is D1=63 mm, the outer diameter D2 of the cylindrical body 11 is D2=65 mm, and the inner diameter D3 of the opening 17 provided at the tip of the tapered portion 16 is D3. = 53 mm. Further, as shown in FIG. 3B, the outer diameter D4 of the lid 12 is D4=65 mm, the inner diameter D5 of the inner peripheral surface of the cylindrical wall portion is D5=63 mm, and the outer diameter (maximum diameter ) D6 is D6=12 mm. As shown in FIG. 3(c), the outer diameter D7 of the water absorbing member 35 is D7≧62 mm. Also, the inner diameter D8 of the opening 35a of the water absorbing member 35 is D8=12 mm. Further, the thickness H1 of the water absorbing member 35 satisfies H1≧0.5 mm.

The cartridge shown in FIGS. 1 to 3 is manufactured by the following manufacturing process. Hereinafter, the non-explosive crushing composition will be described with reference numeral 50 . As shown in FIG. 4( a ), first, the water absorbing member 35 is attached to the lid 12 . When the water absorbing member 35 is attached to the lid 12 , the cylindrical holding portion 25 of the lid 12 is inserted into the opening 35 a of the water absorbing member 35 . Since the water absorbing member 35 is not fixed to the lid 12 in this state, the water absorbing member 35 may be fixed to the lid 12 in order to prevent the water absorbing member 35 from falling off from the lid 12 .

Next, the cylinder body 11 manufactured by injection molding is loaded with the non-explosive crushing composition 50 in an upright state. The amount of the non-explosive-crushing composition 50 loaded into the cylinder main body 11 ensures that the loaded non-explosive-crushing composition 50 undergoes a thermite reaction when ignited and burned in the igniter 30 held in the tubular holding portion 25. It is set to the amount to produce.

As shown in FIGS. 4(b) and 4(c), after the non-explosive crushing composition 50 is loaded into the cylinder body 11, the lid 12 is attached to the cylinder body 11. As shown in FIGS. At this time, the tapered portion 16 and the fitting portion 15 of the tubular body 11 enter into the tubular wall portion 21 of the lid 12 . The locking protrusions 18 provided on the fitting portion 15 are engaged with the engagement grooves 23 provided on the inner peripheral surface of the cylindrical wall portion 21 of the lid 12 . As a result, the lid 12 is fitted to the cylinder body 11 . When the lid 12 is fitted to the cylinder body 11 , the tip of the cylindrical holding portion 25 of the lid 12 enters the non-explosive crushing composition 50 loaded inside the cylinder body 11 . The igniter 30 is not attached when the cartridge 10 is not in use, and is attached to the cylindrical holding portion of the lid 12 when in use.

As shown in FIG. 5 , when the lid 12 is fitted to the cylinder body 11 , the tapered portion 16 provided at the tip of the fitting portion 15 holds the water absorbing member 35 pressed against the shielding portion 22 of the lid 12 . be done. Therefore, the opening 17 of the tapered portion 16 is blocked by the water absorbing member 35 . Also, by providing the tapered portion 16 , an annular space 45 is formed between the tapered portion 16 of the cylinder main body 11 and the cylindrical wall portion 21 and shielding portion 22 of the lid 12 . In a cross section orthogonal to the axial direction, the outer diameter D7 of the water absorbing member 35 is larger than the inner diameter (diameter of the opening) D3 at the tip of the tapered portion 16 . Therefore, the outer peripheral edge of the water absorbing member 35 is held in the space 45 .

For example, the space 45 communicates with a gap generated between the outer peripheral surface of the fitting portion 15 of the tubular body 11 and the outer peripheral surface of the tubular wall portion 21 of the lid 12 . Therefore, depending on the environment in which the cartridge 10 is held, a gap (not shown) formed between the outer peripheral surface of the fitting portion 15 of the barrel body 11 and the outer peripheral surface of the cylindrical wall portion 21 of the lid 12 may cause moisture or moisture. Moisture or the like enters the inside of the cartridge 10. - 特許庁Moisture entering through a gap between the outer peripheral surface of the fitting portion 15 of the cylinder body 11 and the outer peripheral surface of the tubular wall portion 21 of the lid 12 is absorbed by the outer peripheral edge portion of the water absorbing member 35 entering the space 45. be done. Note that the water absorbing member 35 gels by absorbing water. When the outer peripheral edge of the water absorbing member 35 absorbs water, the outer peripheral edge gels and expands to block the space 45 . As a result, water entering through a gap between the cover 12 and the outer peripheral surface of the tubular wall portion 21 is blocked by the gelled water absorbing member 35 . Therefore, the cartridge 10 is prevented from being flooded.

That is, when manufacturing the cartridge, after fitting the cylinder body and the lid, a tape for preventing water ingress is attached so as to cover the joint between the cylinder body and the lid, or the cylinder body and the lid are attached. It is possible to prevent water from entering the cartridge with a simple structure without fixing the cartridge with an adhesive.

Hereinafter, the water resistance of the cartridge 10 was evaluated by a water pressure resistance test using a water pressure resistance tester 60 shown in FIG. The outline of the water pressure resistance test is as follows. Hereinafter, the non-explosive crushing composition will be referred to as crushing agent, and the water absorbing member will be referred to as polymer sheet.
(1) Weigh the lid 12 and the polymer sheet.
(2) The cartridge 10 is loaded with a crushed drug or a pseudo drug corresponding to the crushed drug, and the weight of the cartridge 10 is measured.
(3) The cartridge 10 is inserted into the pressure container (chamber) 61 and the chamber 61 and lid 62 are fixed using the bolt 63 and nut 64 . A packing such as an O-ring is interposed between the chamber 61 and the lid 62 to prevent liquid leakage. In addition, there are, for example, eight locations to be fixed using the bolts 63 and the nuts 64 .
(4) The pressurizer 65 is operated to introduce water into the chamber 61 and pressurize it until the pressure gauge 66 reaches a predetermined pressure.
(5) After maintaining the predetermined pressure for a certain period of time, the weight of the cartridge 10 taken out from the chamber 61 is measured.

<Evaluation of water resistance of cartridges depending on the number of polymer sheets>
Table 1 shows the results of the evaluation of the water resistance of the cartridge when the number of polymer sheets was changed. In Table 1, Example 1 and Example 2 show the evaluation results when the number of polymer sheets is 0 (unused). In addition, Example 3 and Example 4 show the evaluation results for a cartridge housing one polymer sheet. In addition, Example 5 and Example 6 show the evaluation results for a cartridge in which two polymer sheets are stacked and housed. In addition, Example 7 and Example 8 show the evaluation results for a cartridge in which three polymer sheets are stacked and housed. Furthermore, Examples 9 to 18 show the evaluation results for cartridges in which four polymer sheets are stacked and housed. In the table, Example 1 corresponds to Example 1 described in the specification, and the same applies to other examples.

In the cartridge 10 shown in Example 1, the weight difference of the entire cartridge before and after the water pressure resistance test is 91.01 g. In the case of Example 1, since no polymer sheet is used, the difference in the weight of the entire cartridge between before and after the water pressure resistance test is the amount of water intrusion into the cartridge (hereinafter referred to as the amount of water intrusion into the cartridge). Therefore, in Example 1, the amount of water in the cartridge is 91.01 g. In addition, water immersion by tentacles was evaluated as "present".

In the cartridge shown in Example 2, the weight difference of the entire cartridge before and after the water pressure resistance test is 69.47 g. As in Example 1, Example 2 does not use a polymer sheet, so the difference in the weight of the entire cartridge before and after the water pressure resistance test is the amount of water intrusion into the cartridge. Therefore, in Example 2, the amount of water in the cartridge is 69.47 g. In addition, water immersion by tentacles was evaluated as "present".

From the results of Examples 1 and 2, when the cartridge was manufactured without using a polymer sheet, after 6 hours in an environment of 0.06 Mpa (water depth: equivalent to 6 m), the cartridge was found to be submerged.

In the cartridge shown in Example 3, the weight difference of the entire cartridge before and after the water pressure resistance test is 9.72 g. In addition, the weight difference between the lid and the polymer sheet before and after the water pressure resistance test, in other words, the water absorption amount of the polymer sheet is 2.25 g. Hereinafter, the weight difference between the lid and the polymer sheet before and after the water pressure resistance test is referred to as the water absorption amount of the polymer sheet. Therefore, the amount of water soaked into the cartridge can be obtained from the difference between the weight difference of the entire cartridge before and after the water pressure resistance test and the amount of water absorbed by the polymer sheet. Therefore, the amount of water in the cartridge is 9.72-2.25=7.47g. In addition, water immersion by tentacles was evaluated as "present".

In the cartridge shown in Example 4, the weight difference of the entire cartridge before and after the water pressure resistance test is 19.43 g. Moreover, the water absorption amount of the polymer sheet is 3.56 g. Therefore, the amount of water in the cartridge is 15.87 g. In addition, water immersion by tentacles was evaluated as "present".

From the results of Examples 3 and 4, even when a single polymer sheet was used to manufacture a cartridge, after 6 hours in an environment of 0.06 Mpa (water depth: equivalent to 6 m), the drug The result was that the cylinder was flooded.

In the cartridge shown in Example 5, the weight difference of the entire cartridge before and after the water pressure resistance test is 11.42 g. Moreover, the water absorption amount of the polymer sheet is 3.35 g. Therefore, the amount of water in the cartridge is 8.07 g. In addition, water immersion by tentacles was evaluated as "present".

In the cartridge shown in Example 6, the weight difference of the entire cartridge before and after the water pressure resistance test is 4.47 g. Moreover, the water absorption amount of the polymer sheet is 1.26 g. Therefore, the amount of water in the cartridge is 3.21 g. In addition, water immersion by tentacles was evaluated as "present".

From the results of Examples 5 and 6, even when the cartridge was manufactured by laminating two polymer sheets, after 6 hours in an environment of 0.06 Mpa (water depth: equivalent to 6 m), the drug The result was that the cylinder was flooded.

In the cartridge shown in Example 7, the weight difference of the entire cartridge before and after the water pressure resistance test is 9.51 g. Moreover, the water absorption amount of the polymer sheet is 4.05 g. Therefore, the amount of water in the cartridge is 5.46 g. In addition, water immersion by tentacles was evaluated as "present".

In the cartridge shown in Example 8, the weight difference of the entire cartridge before and after the water pressure resistance test is 5.74 g. Moreover, the water absorption amount of the polymer sheet is 4.42 g. Therefore, the amount of water in the cartridge is 1.32 g. In addition, water immersion by tentacles was evaluated as "present".

From the results of Examples 7 and 8, even when three polymer sheets were laminated to manufacture a cartridge, after 6 hours in an environment of 0.06 Mpa (water depth: equivalent to 6 m), the drug The result was that the cylinder was flooded.

In the cartridge shown in Example 9, the weight difference of the entire cartridge before and after the water pressure resistance test is 6.91 g. Moreover, the water absorption amount of the polymer sheet is 6.79 g. Therefore, the amount of water in the cartridge is 0.12 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 10, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.45 g. Moreover, the water absorption amount of the polymer sheet is 6.84 g. Therefore, the amount of water in the cartridge is 0.61 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 11, the weight difference of the entire cartridge before and after the water pressure resistance test was 7.14 g. Moreover, the water absorption amount of the polymer sheet is 7.06 g. Therefore, the amount of water in the cartridge is 0.08 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 12, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.07 g. Moreover, the water absorption amount of the polymer sheet is 6.75 g. Therefore, the amount of water in the cartridge is 0.32 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 13, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.47 g. Moreover, the water absorption amount of the polymer sheet is 7.20 g. Therefore, the amount of water in the cartridge is 0.27 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 14, the weight difference of the entire cartridge before and after the water pressure resistance test is 6.76 g. Moreover, the water absorption amount of the polymer sheet is 6.27 g. Therefore, the amount of water in the cartridge is 0.49 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 15, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.25 g. Moreover, the water absorption amount of the polymer sheet is 6.71 g. Therefore, the amount of water in the cartridge is 0.54 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 16, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.37 g. Moreover, the water absorption amount of the polymer sheet is 6.94 g. Therefore, the amount of water in the cartridge is 0.43 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 17, the weight difference of the entire cartridge before and after the water pressure resistance test was 7.46 g. Moreover, the water absorption amount of the polymer sheet is 7.39 g. Therefore, the amount of water in the cartridge is 0.07 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 18, the weight difference of the entire cartridge before and after the water pressure resistance test was 7.13 g. Moreover, the water absorption amount of the polymer sheet is 6.97 g. Therefore, the amount of water in the cartridge is 0.16 g. In addition, water infiltration by tentacles was evaluated as "no".

From the results of Examples 9 to 18, when four polymer sheets were laminated to manufacture a cartridge, even after 6 hours in an environment of 0.06 Mpa (water depth: 6 m), the inside of the cartridge It was found that there was no water inundation.

Here, when four polymer sheets are laminated, the capacity of the polymer sheet is π×3.1 cm×3.1 cm×0.1 cm−π×0.6 cm×0.6 cm×0.1 cm=2. 90597 ^cm3 . Therefore, a water pressure resistance test was performed on cartridges containing polymer sheets having the same capacity and different outer diameters and thicknesses to evaluate the water resistance of the cartridges. In this case, the outer diameter and thickness of the polymer sheet are varied so that the volume of the polymer sheet remains the same.

<Evaluation of the water resistance of the cartridge due to the difference in the outer diameter and thickness of the polymer sheet>
In Table 2 below, "sheet A" indicates a polymer sheet having an outer diameter D7 of 88 mm and a thickness H1 of 0.5 mm. Here, the thickness H1=0.5 mm is the thickness when two polymer sheets are laminated. "Sheet B" indicates a polymer sheet having an outer diameter D7 of 72 mm and a thickness H1 of 0.75 mm. Here, the thickness H1=0.75 mm is the thickness when three polymer sheets are laminated. Further, "sheet C" indicates a polymer sheet having an outer diameter D7 of 56 mm and a thickness H1 of 1.25 mm. Here, the thickness H1=1.25 mm is the thickness when five polymer sheets are laminated.

Also in this case, for the cartridges using the above-mentioned "sheet A", "sheet B", and "sheet C", the water pressure applied to the cartridge is set to 0.06 MPa, and the water pressure load time is set to 6 hours. A water pressure resistance test was performed. Further, the cartridges using "Sheet A" and "Sheet B" were subjected to a water pressure resistance test in which the water pressure applied to the cartridge was set to 0.06 MPa and the water pressure load time was set to 6 hours. rice field.

Table 2 shows the results of a water pressure resistance test in which the water pressure applied to the cartridge was set to 0.06 MPa and the water pressure load time was set to 6 hours. In Table 2, Examples 19 to 23 are cartridges using "Sheet A", and Examples 24 to 28 are cartridges using "Sheet B". Further, Examples 29 and 30 are cartridges using "Sheet C".

In the cartridge shown in Example 19, the weight difference of the entire cartridge before and after the water pressure resistance test is 2.35 g. Moreover, the water absorption amount of the polymer sheet is 2.25 g. Therefore, the amount of water in the cartridge is 0.10 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 20, the weight difference of the entire cartridge before and after the water pressure resistance test is 6.26 g. Moreover, the water absorption amount of the polymer sheet is 6.01 g. Therefore, the amount of water in the cartridge is 0.25 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 21, the weight difference of the entire cartridge before and after the water pressure resistance test is 5.41 g. Moreover, the water absorption amount of the polymer sheet is 5.36 g. Therefore, the amount of water in the cartridge is 0.05 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 22, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.01 g. Moreover, the water absorption amount of the polymer sheet is 6.92 g. Therefore, the amount of water in the cartridge is 0.09 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 23, the weight difference of the entire cartridge before and after the water pressure resistance test is 2.68 g. Moreover, the water absorption amount of the polymer sheet is 2.55 g. Therefore, the amount of water in the cartridge is 0.13 g. In addition, water infiltration by tentacles was evaluated as "no".

That is, regarding "Sheet A" used in the cartridges of Examples 19 to 23, there was no water intrusion into the cartridge even after 6 hours in an environment of 0.06 Mpa (water depth: equivalent to 6 m). The result was obtained.

In the cartridge shown in Example 24, the weight difference of the entire cartridge before and after the water pressure resistance test is 5.46 g. Moreover, the water absorption amount of the polymer sheet is 5.36 g. Therefore, the amount of water in the cartridge is 0.10 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 25, the weight difference of the entire cartridge before and after the water pressure resistance test was 6.13 g. Moreover, the water absorption amount of the polymer sheet is 5.88 g. Therefore, the amount of water in the cartridge is 0.25 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 26, the weight difference of the entire cartridge before and after the water pressure resistance test is 6.75 g. Moreover, the water absorption amount of the polymer sheet is 6.63 g. Therefore, the amount of water in the cartridge is 0.12 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 27, the weight difference of the entire cartridge before and after the water pressure resistance test is 6.00 g. Moreover, the water absorption amount of the polymer sheet is 5.91 g. Therefore, the amount of water in the cartridge is 0.09 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 28, the weight difference of the entire cartridge before and after the water pressure resistance test is 5.63 g. Moreover, the water absorption amount of the polymer sheet is 5.29 g. Therefore, the amount of water in the cartridge is 0.34 g. In addition, water infiltration by tentacles was evaluated as "no".

In other words, with regard to "Sheet B" used in the cartridges of Examples 24 to 28, similarly to Sheet A, even after 6 hours in an environment of 0.06 Mpa (water depth: equivalent to 6 m), the cartridge remained intact. The result was that there was no water intrusion into the interior.

In the cartridge shown in Example 29, the weight difference of the entire cartridge before and after the water pressure resistance test is 68.52 g. Also, the water absorption of the polymer sheet is 6.21. Therefore, the amount of water in the cartridge is 62.31 g. In addition, water immersion by tentacles was evaluated as "present".

In the cartridge shown in Example 30, the weight difference of the entire cartridge before and after the water pressure resistance test was 7.07 g. Moreover, the water absorption amount of the polymer sheet is 6.84 g. Therefore, the amount of water in the cartridge is 0.23 g. In addition, water infiltration by tentacles was evaluated as "no".

In other words, in view of the results of Examples 29 and 30, regarding "Sheet C", after 6 hours in an environment of 0.06 Mpa (water depth: equivalent to 6 m), there is a risk of water entering the cartridge. was found to be high.

Next, the cartridges using "Sheet A" and "Sheet B" were subjected to a water pressure resistance test in which the water pressure applied to the cartridge was set to 0.1 MPa and the water pressure load time was set to 6 hours. In Table 2, Examples 31 to 35 are cartridges using "Sheet A", and Examples 36 to 40 are cartridges using "Sheet B".

In the cartridge shown in Example 31, the weight difference of the entire cartridge before and after the water pressure resistance test is 4.89 g. Moreover, the water absorption amount of the polymer sheet is 4.88 g. Therefore, the amount of water in the cartridge is 0.01 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 32, the weight difference of the entire cartridge before and after the water pressure resistance test was 6.61 g. Moreover, the water absorption amount of the polymer sheet is 6.03 g. Therefore, the amount of water in the cartridge is 0.58 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 33, the weight difference of the entire cartridge before and after the water pressure resistance test is 4.73 g. Moreover, the water absorption amount of the polymer sheet is 4.47 g. Therefore, the amount of water in the cartridge is 0.26 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 34, the weight difference of the entire cartridge before and after the water pressure resistance test is 6.61 g. Moreover, the water absorption amount of the polymer sheet is 6.32 g. Therefore, the amount of water in the cartridge is 0.29 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 35, the weight difference of the entire cartridge before and after the water pressure resistance test is 2.20 g. Moreover, the water absorption amount of the polymer sheet is 1.59 g. Therefore, the amount of water in the cartridge is 0.61 g. In addition, water infiltration by tentacles was evaluated as "no".

That is, regarding "Sheet A" used in the cartridges of Examples 31 to 35, there was no water intrusion into the cartridge even after 6 hours in an environment of 0.06 Mpa (water depth: equivalent to 6 m). The result was obtained.

In the cartridge shown in Example 36, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.35 g. Moreover, the water absorption amount of the polymer sheet is 7.26 g. Therefore, the amount of water in the cartridge is 0.09 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 37, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.27 g. Moreover, the water absorption amount of the polymer sheet is 7.24 g. Therefore, the amount of water in the cartridge is 0.03 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 38, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.80 g. Moreover, the water absorption amount of the polymer sheet is 7.70 g. Therefore, the amount of water in the cartridge is 0.10 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 39, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.93 g. Moreover, the water absorption amount of the polymer sheet is 7.81 g. Therefore, the amount of water in the cartridge is 0.09 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 40, the weight difference of the entire cartridge before and after the water pressure resistance test is 5.73 g. Moreover, the water absorption amount of the polymer sheet is 5.55 g. Therefore, the amount of water in the cartridge is 0.18 g. In addition, water infiltration by tentacles was evaluated as "no".

In other words, with regard to "Sheet B" used in the cartridges of Examples 24 to 28, similarly to Sheet A, even after 6 hours in an environment of 0.1 Mpa (water depth: equivalent to 10 m), the cartridge remained intact. The result was that there was no water intrusion into the interior.

Next, Table 3 shows the results of a water pressure resistance test performed on a cartridge using a polymer sheet having an outer diameter D7 of 62 mm and a thickness H1 of 1.5 mm. Here, the thickness H1=1.5 mm is the thickness when three polymer sheets are laminated.

First, a water pressure resistance test was conducted in which the water pressure applied to the cartridge was set to 0.06 MPa and the water pressure load time was set to 6 hours. The results are Examples 41-55.

In the cartridge shown in Example 41, the weight difference of the entire cartridge before and after the water pressure resistance test was 6.91 g. Moreover, the water absorption amount of the polymer sheet is 6.79 g. Therefore, the amount of water in the cartridge is 0.12 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 42, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.45 g. Moreover, the water absorption amount of the polymer sheet is 6.84 g. Therefore, the amount of water in the cartridge is 0.61 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 43, the weight difference of the entire cartridge before and after the water pressure resistance test was 7.14 g. Moreover, the water absorption amount of the polymer sheet is 7.06 g. Therefore, the amount of water in the cartridge is 0.80 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 44, the weight difference of the entire cartridge before and after the water pressure resistance test was 7.07 g. Moreover, the water absorption amount of the polymer sheet is 6.75 g. Therefore, the amount of water in the cartridge is 0.32 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 45, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.47 g. Moreover, the water absorption amount of the polymer sheet is 7.20 g. Therefore, the amount of water in the cartridge is 0.27 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 46, the weight difference of the entire cartridge before and after the water pressure resistance test is 6.76 g. Moreover, the water absorption amount of the polymer sheet is 6.27 g. Therefore, the amount of water in the cartridge is 0.49 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 47, the weight difference of the entire cartridge before and after the water pressure resistance test was 7.25 g. Moreover, the water absorption amount of the polymer sheet is 6.71 g. Therefore, the amount of water in the cartridge is 0.54 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 48, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.37 g. Moreover, the water absorption amount of the polymer sheet is 6.49 g. Therefore, the amount of water in the cartridge is 0.43 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 49, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.46 g. Moreover, the water absorption amount of the polymer sheet is 7.39 g. Therefore, the amount of water in the cartridge is 7.46-7.39=0.07g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 50, the weight difference of the entire cartridge before and after the water pressure resistance test was 7.13 g. Moreover, the water absorption amount of the polymer sheet is 6.97 g. Therefore, the amount of water in the cartridge is 0.16 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 51, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.49 g. Moreover, the water absorption amount of the polymer sheet is 7.43 g. Therefore, the amount of water in the cartridge is 0.06 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 52, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.52 g. Moreover, the water absorption amount of the polymer sheet is 7.14 g. Therefore, the amount of water in the cartridge is 0.38 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 53, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.58 g. Moreover, the water absorption amount of the polymer sheet is 7.12 g. Therefore, the amount of water in the cartridge is 0.46 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 54, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.54 g. Moreover, the water absorption amount of the polymer sheet is 6.93 g. Therefore, the amount of water in the cartridge is 0.61 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 55, the weight difference of the entire cartridge before and after the water pressure resistance test is 6.79 g. Moreover, the water absorption amount of the polymer sheet is 6.71 g. Therefore, the amount of water in the cartridge is 0.08 g. In addition, water infiltration by tentacles was evaluated as "no".

In other words, from the results of Examples 51 to 55, when a polymer sheet with an outer diameter D7 = 62 mm and a thickness H1 = 1.5 mm is used for the cartridge, an environment of 0.06 Mpa (water depth: equivalent to 6 m) A result was obtained that water did not enter the inside of the cartridge even after 6 hours had passed under it.

In addition, a water pressure resistance test was conducted in which the water pressure applied to the cartridge was set to 0.1 MPa and the water pressure load time was set to 6 hours. The results are Examples 56-65.

In the cartridge shown in Example 56, the weight difference of the entire cartridge before and after the water pressure resistance test is 5.73 g. Moreover, the water absorption amount of the polymer sheet is 5.63 g. Therefore, the amount of water in the cartridge is 0.10 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 57, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.41 g. Moreover, the water absorption amount of the polymer sheet is 6.82 g. Therefore, the amount of water in the cartridge is 0.59 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 58, the weight difference of the entire cartridge before and after the water pressure resistance test is 6.52 g. Moreover, the water absorption amount of the polymer sheet is 6.35 g. Therefore, the amount of water in the cartridge is 0.17 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 59, the weight difference of the entire cartridge before and after the water pressure resistance test is 7.95 g. Moreover, the water absorption amount of the polymer sheet is 7.40 g. Therefore, the amount of water in the cartridge is 0.55 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 60, the weight difference of the entire cartridge before and after the water pressure resistance test is 5.72 g. Moreover, the water absorption amount of the polymer sheet is 5.56 g. Therefore, the amount of water in the cartridge is 0.16 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 61, the weight difference of the entire cartridge before and after the water pressure resistance test is 5.75 g. Moreover, the water absorption amount of the polymer sheet is 5.65 g. Therefore, the amount of water in the cartridge is 0.10 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 62, the weight difference of the entire cartridge before and after the water pressure resistance test is 6.66 g. Moreover, the water absorption amount of the polymer sheet is 5.95 g. Therefore, the amount of water in the cartridge is 0.71 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 63, the weight difference of the entire cartridge before and after the water pressure resistance test is 6.45 g. Moreover, the water absorption amount of the polymer sheet is 6.34 g. Therefore, the amount of water in the cartridge is 0.11 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 64, the weight difference of the entire cartridge before and after the water pressure resistance test is 6.58 g. Moreover, the water absorption amount of the polymer sheet is 6.40 g. Therefore, the amount of water in the cartridge is 0.18 g. In addition, water infiltration by tentacles was evaluated as "no".

In the cartridge shown in Example 65, the weight difference of the entire cartridge before and after the water pressure resistance test is 6.31 g. Moreover, the water absorption amount of the polymer sheet is 6.01 g. Therefore, the amount of water in the cartridge is 0.30 g. In addition, water infiltration by tentacles was evaluated as "no".

That is, from the results of Examples 56 to 65, when a polymer sheet with an outer diameter D7 = 62 mm and a thickness H1 = 1.5 mm is used for the cartridge, an environment of 0.1 Mpa (water depth: equivalent to 10 m) A result was obtained that water did not enter the inside of the cartridge even after 6 hours had passed under it.

Therefore, from the results shown in Tables 2 and 3, the outer diameter D1 of the cylinder main body is D1 = 65 mm, the outer diameter D2 of the fitting portion is D2 = 63 mm, the inner diameter D3 of the tip of the tapered portion is D3 = 53 mm, and the lid The outer diameter D4 of the lid is D4 = 65 mm, the inner diameter D5 of the lid is D5 = 63 mm, and the outer diameter (maximum diameter) D6 of the cylindrical holding portion is D6 = 12 mm. was 62 mm or more, it was possible to obtain the result that water was prevented from entering the inside of the cartridge.

In addition, when the outer diameter D7 of the polymer sheet exceeds the inner diameter D5 of the lid, the outer peripheral edge of the polymer sheet is considered to be bent at the cylindrical wall of the lid and exist in the space described above. Therefore, the volume of the outer peripheral portion of the polymer sheet that enters into the space increases, and as a result, the water absorption performance of the infiltrating water increases, and as a result, the polymer sheet easily expands due to gelation, so that the infiltration of water can be reliably prevented.

<Evaluation of water resistance of cartridge with or without tapered portion>
Next, a water resistance test was conducted to determine whether the presence or absence of the tapered portion provided in the fitting portion of the barrel body contributed to the ingress of water into the cartridge. Note that in this water resistance test, the test was performed using a different size cartridge instead of the same size cartridge as in the present embodiment.

First, as shown in FIG. 7(a), a cylindrical body 73 having two engaging grooves 72a and 72b in a fitting portion 71, and locking protrusions 75a and 75a corresponding to the two engaging grooves 72a and 72b. A water resistance test was conducted using a cartridge 70 having a lid 76 having 75b on its inner peripheral surface. In the tube body 73 shown in FIG. 7( a ), no tapered portion is provided on the distal end side of the fitting portion 71 . A polymer sheet 77 having an outer diameter and a thickness set so that the sheet volume is 3.0 cm ³ is housed inside the cartridge 70 . The outer diameter D9 of the fitting portion 71 of the cylinder body 73 and the inner diameter D10 of the lid 76 are 36 mm. Also, the outer diameter of the polymer sheet was set to 37 mm. At this time, the volume of the polymer sheet was 3.0 cm ³ . If the volume of the polymer sheet is set at 3.0 cm ³ , the thickness of the polymer sheet will be 2.75 mm. That is, eleven polymer sheets with a thickness of 0.25 mm are laminated and housed inside the cartridge 70 .

Table 4 below shows the results of a water pressure resistance test using the cartridge 70 shown in FIG. The water pressure resistance test was conducted by setting the water pressure applied to the cartridge to 0.06 MPa and the water pressure load time to 6 hours.

In the cartridge shown in Example 66, the weight difference of the entire cartridge before and after the water pressure resistance test is 53.72 g. Moreover, the water absorption amount of the polymer sheet is 19.3 g. Therefore, the amount of water in the cartridge is 34.42 g. In addition, water immersion by tentacles was evaluated as "present".

In the cartridge shown in Example 67, the weight difference of the entire cartridge before and after the water pressure resistance test is 52.72 g. Moreover, the water absorption amount of the polymer sheet is 18.87 g. Therefore, the amount of water in the cartridge is 33.85 g. In addition, water infiltration by tentacles was evaluated as "present".

In addition, as shown in FIG. 7(b), a cartridge 80 having a cylinder body 82 having locking projections 81 and a lid 84 having locking grooves 83 on its inner peripheral surface is used to A sex test was performed. The tapered portion is not provided in the cylinder main body 82 shown in FIG. 7(b), either. For such a cartridge 80, a polymer sheet 85 having an outer diameter and thickness set so that the sheet volume is 2.5 cm ³ or 3.0 cm ³ was housed inside the cartridge 80 . The outer diameter D11 of the cylinder main body 82 and the inner diameter D12 of the lid 84 are 53 mm. Therefore, the outer diameter of the polymer sheet 85 was set to 56 mm.

For example, when the volume of the polymer sheet is set to 2.5 cm ³ , the thickness of the polymer sheet is 1 mm. That is, four polymer sheets with a thickness of 0.25 mm are laminated and housed inside the cartridge 80 . Moreover, when the sheet volume is 3.0 cm ³ , the thickness of the polymer sheet is 1.254 mm. That is, five polymer sheets with a thickness of 0.25 mm are laminated and housed inside the cartridge 80 .

A water pressure resistance test was conducted in which the water pressure applied to the cartridge was set to 0.06 MPa, and the water pressure load time was set to 6 hours. Table 5 below shows the results of a water pressure resistance test using the cartridge 80 shown in FIG. 7(b).

In Table 5, cartridges containing polymer sheets with a sheet volume of 2.5 cm ³ are labeled as Examples 68 to 71, and cartridges containing polymer sheets with a sheet volume of 3.0 are labeled as Examples 72 and 71. This is referred to as Example 73. Here, the thickness of the cartridges used in Examples 68 and 69 is 1 mm, and the thickness of the cartridges used in Examples 70 to 73 is 2 mm.

In the cartridge shown in Example 68, the weight difference of the entire cartridge before and after the water pressure resistance test is 72.98 g. Moreover, the water absorption amount of the polymer sheet is 6.97 g. Therefore, the amount of water in the cartridge is 66.01 g. In addition, water infiltration by tentacles was evaluated as "present".

In the cartridge shown in Example 69, the weight difference of the entire cartridge before and after the water pressure resistance test is 56.03 g. Moreover, the water absorption amount of the polymer sheet is 8.66 g. Therefore, the amount of water in the cartridge is 47.37 g. In addition, water immersion by tentacles was evaluated as "present".

In the cartridge shown in Example 70, the weight difference of the entire cartridge before and after the water pressure resistance test is 37.18 g. Moreover, the water absorption amount of the polymer sheet is 7.02 g. Therefore, the amount of water in the cartridge is 30.16 g. In addition, water immersion by tentacles was evaluated as "present".

In the cartridge shown in Example 71, the weight difference of the entire cartridge before and after the water pressure resistance test is 19.02 g. Moreover, the water absorption amount of the polymer sheet is 3.94 g. Therefore, the amount of water in the cartridge is 15.08 g. In addition, water immersion by tentacles was evaluated as "present".

In the cartridge shown in Example 72, the weight difference of the entire cartridge before and after the water pressure resistance test is 68.58 g. Moreover, the water absorption amount of the polymer sheet is 48.65 g. Therefore, the amount of water in the cartridge is 19.93 g. In addition, water immersion by tentacles was evaluated as "present".

In the cartridge shown in Example 73, the weight difference of the entire cartridge before and after the water pressure resistance test is 73.69 g. Moreover, the water absorption amount of the polymer sheet is 49.06 g. Therefore, the amount of water in the cartridge is 24.63 g. In addition, water immersion by tentacles was evaluated as "present".

As described above, from the results shown in Tables 4 and 5, even if the volume of the polymer sheet is changed, if the fitting portion does not have a tapered portion, the environment of 0.06 Mpa (water depth: equivalent to 6 m) The result was that the cartridge 80 was seen to be flooded after 6 hours had passed under it.

That is, in the case of the cartridge 70 shown in FIG. 7(a) or the cartridge 80 shown in FIG. It has been found that the body and lid need to be glued together.

That is, the results shown in Table 4 or Table 5 demonstrate the effectiveness of the tapered portion provided at the tip of the fitting portion.

DESCRIPTION OF SYMBOLS 10... cartridge, 11... cylinder main body, 12... cover, 15... fitting part, 16... taper part, 17... opening, 18... latching projection, 21... cylindrical wall part, 22... shielding part, 23... engagement Matching groove 25 Cylindrical holding part 30 Ignitor 35 Water absorbing member 50 Non-explosive crushing composition

Claims (8)

a tubular body provided with a fitting portion having a reduced diameter on the tip end side at one end side in the axial direction, the tip of the fitting portion being open;
The fitting portion has a cylindrical wall portion into which the fitting portion is inserted, and the end portion of the tubular wall portion opposite to the end portion into which the fitting portion is inserted is closed. a lid that shields the opening of the fitting portion when fitted to the fitting portion and at the same time forms a space outside the diameter-reduced portion provided on the tip side of the fitting portion;
When the lid and the fitting portion are fitted together, the fitting portion presses the inside of the lid, and the outer peripheral edge located outside the diameter-reduced portion of the fitting portion enters the space. and a water absorbing member held in a free state. In the cylindrical body according to claim 1,
A tubular body characterized in that, in a cross section perpendicular to the axial direction of the tubular body, the water absorbing member has an area equal to or larger than an area of the internal space of the lid. In the cylindrical body according to claim 1 or claim 2,
The cylindrical body, wherein the water-absorbing member contains a water-absorbing polymer that gels when water is absorbed. In the tubular body according to claim 3,
A cylindrical body, wherein the water-absorbing member is formed by laminating a plurality of polymer sheets composed of a water-absorbing polymer layer and paper layers provided on front and back sides of the water-absorbing polymer layer. In the cylindrical body according to claim 3 or claim 4,
A cylindrical body, wherein the water absorbing member expands into the space due to gelling caused by water absorption, and prevents water from entering through a gap formed in a fitting portion between the cylindrical main body and the lid. . In the cylindrical body according to any one of claims 1 to 5,
The cylindrical body, wherein the fitting portion has a tapered portion whose diameter is reduced toward the tip. In the cylindrical body according to any one of claims 1 to 6,
An engaging projection is provided on either the outer peripheral surface of the fitting portion or the inner peripheral surface of the tubular wall portion of the lid, and the other is engaged with the engaging projection when the tubular body and the lid are fitted together. A tubular body characterized by having an engaging groove for engagement. a cylindrical body according to any one of claims 1 to 7;
a non-explosive crushing composition loaded inside the tubular body;
an ignition device that is attached to a holding portion provided on either the lid or the cylinder body and that causes a chemical reaction of the non-explosive crushing composition when ignited;
A cartridge with a

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