WO2022244527A1 - 容器及び容器組立体 - Google Patents
容器及び容器組立体 Download PDFInfo
- Publication number
- WO2022244527A1 WO2022244527A1 PCT/JP2022/016522 JP2022016522W WO2022244527A1 WO 2022244527 A1 WO2022244527 A1 WO 2022244527A1 JP 2022016522 W JP2022016522 W JP 2022016522W WO 2022244527 A1 WO2022244527 A1 WO 2022244527A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- container
- main body
- liquid
- support base
- recesses
- Prior art date
Links
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
- B65D25/20—External fittings
- B65D25/24—External fittings for spacing bases of containers from supporting surfaces, e.g. legs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D23/00—Details of bottles or jars not otherwise provided for
- B65D23/001—Supporting means fixed to the container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D23/00—Details of bottles or jars not otherwise provided for
- B65D23/10—Handles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
- B65D25/20—External fittings
- B65D25/22—External fittings for facilitating lifting or suspending of containers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
Definitions
- the present invention relates to a container for containing liquid and a container assembly including this container.
- Industrial high-purity chemical liquids such as photoresists and detergents used in semiconductor manufacturing and liquid crystal display manufacturing, and liquids such as food material liquids must be kept in high-purity containers to prevent contamination and deterioration. be accommodated. These liquids are stored and transported while being contained in a container, or are set in a liquid transfer device and discharged from the container for use.
- the bottom surface of such a container is generally formed flat so that the container can stand on its own.
- a liquid feed pipe and a gas supply pipe are inserted into a container, gas is fed into the container from the gas feed pipe, the internal pressure of the container is increased by this gas, and the liquid is fed to the liquid feed pipe, and the liquid is discharged from the container.
- a high-pressure gas of, for example, 100-200 kPa is often used to pump a highly viscous liquid that is difficult to flow.
- Generally known containers having a flat bottom surface may be deformed such that the bottom surface bulges and the container is tilted when the pressure inside the container is increased by the high-pressure gas.
- the tip of the liquid-sending pipe cannot reach the liquid due to deformation of the bottom surface or inclination of the container, and there is a risk that all the liquid contained in the container cannot be discharged from the container.
- Patent Document 1 describes a container with a hemispherical bottom surface and a support base (receiving tool) for making the container stand on its own.
- the container and the support base are fitted together by engaging a series of grooves extending in the circumferential direction on the outer surface of the outer wall of the container with projections provided on the inner surface of the support base. Since the bottom surface of the container is a hemispherical surface, the internal pressure of the container due to the high-pressure gas is evenly applied to the bottom surface. At this time, the entire bottom surface is extended downward by the pressure of the high-pressure gas, so that the concave groove follows this extension and extends as if a helical spring were extended. As a result, the concave groove pushes out the convex portion of the receiver, and the engagement with the convex portion cannot be maintained. As a result, the container comes off the support and falls down, so that it cannot be pumped stably.
- Patent Document 2 describes a liquid container that has a container body with a round bottom and a support that has a through-hole in the center and supports the container body so that it can stand on its own. A circumferential groove is formed in the container body for engagement with the support base.
- This liquid container is used by being set in a liquid delivery device having a pedestal having projections that fit into the through-holes of the support base and contact the round bottom, and a pressing member that presses the upper end of the container body. Since the container body is sandwiched between the projecting portion of the pedestal provided in the liquid delivery device and a container support such as a pressing member, even if the internal pressure of the container body increases, the circumferential groove does not extend, and the container body does not move from the support base. I can't come off.
- the liquid container of Patent Document 2 requires a liquid transfer device having a container support such as a protrusion and a pressing member to pressure-feed the liquid in the container with high-pressure gas. Equipment is limited and lacks versatility.
- the present invention has been made to solve the above-mentioned problems. To provide a highly versatile container and container assembly capable of remarkably suppressing the deformation of the container, performing stable liquid transfer, and being set and used in a liquid transfer device having no container support. intended to
- a container according to the present invention which has been made to achieve the above object, is a container for containing a liquid and for pumping the liquid, the container having a substantially cylindrical main body and one end of the main body. a stepped portion with a reduced diameter while continuing to the other end of the main body portion; and a round bottom portion that is continuous with the stepped portion and swells away from the stepped portion; , the stepped portion, and a series of parting lines extending over the round bottom portion are recessed at positions that do not overlap, and the stepped portion is intermittently provided with a plurality of recesses that are engaged with claw portions of a support base for allowing the container to stand on its own.
- the concave portion has a substantially oval shape that is elongated in the circumferential direction of the main body portion, and the total length of the plurality of concave portions in the circumferential direction is 20 to 20 times the outermost circumference length of the main body portion. 50%.
- the recesses are formed at four positions separated from the parting line by an angle of 20 to 45° from the center axis of the main body, or at six positions separated from each other by 60°, and sandwiching the parting line. They may be provided at symmetrical positions.
- the body portion of any one of the containers described above has a body portion and a neck portion closer to the cylinder mouth and having a smaller diameter than the body portion, and a handle is provided on the outer surface of the neck portion. are fitted and/or screwed together.
- a container assembly includes any one of the containers described above, an opening in which the round bottom is fitted, and claws extending from the periphery of the opening and engaging with the recess. a free-standing support base.
- the concave portions for engaging with the claws of the support stand are intermittently formed at specific positions. Since it does not expand or deform due to the pressure, the support base does not come off from the container, and the liquid can be stably pumped.
- the container and the container assembly do not extend in the direction of the central axis of the container itself when the liquid is pumped, there is no need for a container support for suppressing the deformation of the container in the liquid feeding device. , versatile.
- FIG. 1 is a front view and an end view taken along the line AA showing a container to which the present invention is applied;
- FIG. It is a perspective view and an exploded perspective view showing a container assembly to which the present invention is applied.
- FIG. 4 is an end view showing another example of a container to which the present invention is applied;
- FIG. 10 is an end view of a container of Comparative Example 1 to which the present invention is not applied;
- FIG. 4 is a perspective view of containers of Comparative Examples 2 and 4 to which the present invention is not applicable;
- FIG. 1(a) is a front view of the container 10, and FIG. 1(b) is an end view taken along the line AA in FIG. 1(a).
- the container 10 is a container for pumping that contains a liquid and can withstand an internal pressure of up to 200 kPa.
- the container 10 has a cylindrical body portion 12, a cylindrical mouth 11 opened at the upper end, which is one end, a stepped portion 13, which is continuous with the lower end, which is the other end of the body portion 12, and the stepped portion 13. and a round bottom portion 15 extending continuously and bulging downward to form a substantially hemispherical shape.
- the inner space of the container 10 communicates with the outside world through the nozzle 11 . This opening and the lower end of the inner wall of the round bottom portion 15 face each other.
- the body portion 12 further has an upper end portion 12a opening the mouthpiece 11, a neck portion 12b extending from the lower end thereof, and a body portion 12c extending further downward from the lower end of the neck portion 12b.
- the trunk portion 12c is gradually reduced in diameter toward the neck portion 12b.
- Male screws 12a 1 and 12b 1 protrude from the outer peripheral surfaces of the upper end portion 12a and the neck portion 12b, respectively.
- the container 10 is made of resin and formed by direct blow molding.
- direct blow molding first, a tube-shaped resin material called a parison melted and extruded at a high temperature is sandwiched between split molds in which the desired shape to be manufactured is carved, and the lower end of the parison is crushed by the mold. Form a pinch-off. This crushed portion becomes the bottom of the container. Compressed air is then forced into the parison by a blow pin. As a result, the parison expands and is pressed against the inner wall of the mold to form a container.
- a parting line PL which is a trace of the mating interface of the split molds, is formed continuously over the upper end portion 12a, the neck portion 12b, the trunk portion 12c, the stepped portion 13, and the round bottom portion 15. As shown in FIG.
- the thickness near the parting line PL in the stepped portion 13 that is directly connected to the round bottom portion 15 is slightly smaller than the thickness at another location on the same circumference. thick. This thick portion increases rigidity and contributes to making the container difficult to deform.
- the recessed portion 14 is located at four locations across the parting line PL and at symmetrical positions across the parting line PL. It is recessed from the outer surface of 10 towards its central axis. The four recesses 14 do not overlap the parting line PL and are formed side by side in the circumferential direction of the container 10 at the stepped portion 13 .
- a claw portion 21 of a support base 20, which will be described later, is engaged with the concave portion 14 (see FIG. 2). As a result, the container 10 and the support base 20 are connected and the container 10 stands on its own.
- the four recesses 14 all have the same shape, and the length H along the circumferential direction of the main body 12 (the circumferential length H) is aligned with the central axis direction of the main body 12 (that is, the center of the container 10). It has a substantially elliptical shape longer than the length V along the axial direction (the length V in the central axis direction).
- the center point h of the circumferential length H of the concave portion 14 is located at an angle of ⁇ from the boundary between the main body portion 12 and the stepped portion 13 on the parting line PL. That is, in a cross-sectional view of the boundary between the main body portion 12 and the stepped portion 13 of the container 10, the four recesses 14 are formed from the reference line Y connecting the parting lines PL with a straight line passing through the central axis C of the container 10. Each is shifted apart by a minimum angle ⁇ . In the example shown in FIG. 1(b), the angle ⁇ is 30°.
- the pressure of the high-pressure gas introduced when pumping the liquid contained in the container 10 causes the inside of the container 10 to expand. Even if the pressure increases, the expansion of the concave portion 14 in the direction of the length V in the central axis direction can be suppressed, and the engagement between the concave portion 14 and the claw portion 21 is maintained so that the support base 20 does not come off the container 10 . Further, since the concave portion 14 does not expand due to the high pressure, the container 10 does not expand in the direction of the central axis (vertical direction in FIG. 1(a)), and the total height of the container 10 is almost the same under normal pressure and high pressure.
- the container 10 can be applied to various liquid transfer devices regardless of the presence or absence of a container support that suppresses deformation of the container, and thus has high versatility.
- the container 10 of the present invention unlike conventionally known containers having a series of circumferential grooves recessed along the outer periphery of the container, the circumferential groove expands under high pressure and the support base does not come off the container. , there is no problem such as an increase in the total height, and the need for a container support for the liquid transfer device is eliminated.
- the angle ⁇ is preferably 20 to 45°, more preferably 20 to 40°, even more preferably 20 to 30°. Preferably, 30° is most preferred. Moreover, it is preferable that all the angles ⁇ are the same. When the angle ⁇ is within this range, the concave portion 14 can be arranged in the vicinity of the parting line PL, which is difficult to deform due to the slightly thick wall thickness.
- the four recesses 14 are symmetrical about the central axis C, line symmetrical about the reference line Y, and/or perpendicular to the reference line Y and the central axis C. If they are arranged symmetrically with respect to the intersecting reference line X, the high pressure during pumping is evenly applied to each concave portion 14, so that the extension of the container 10 can be more effectively suppressed.
- the claws 21 of the support base 20 provided at positions corresponding to the respective recesses 14 are engaged with the recesses 14 , the container 10 and the support base can be separated simply by aligning the pair of the recesses 14 and the claws 21 . 20 can be connected.
- This occupancy is preferably 10 to 90%, more preferably 15 to 70%, and even more preferably 20 to 50%. When the occupancy is within this range, it is possible to reliably engage the concave portion 14 and the claw portion 21 and to suppress the expansion of the concave portion 14 due to the application of high pressure to the inside of the container 10 .
- the circumferential length H is the outer circumference length of the body portion 12 that is chipped due to the presence of the concave portion 14 .
- the outermost circumference length of the main body portion 12 is determined depending on the outer diameter of the main body portion 12 which is arbitrarily set according to the capacity required for the container 10 .
- the capacity of the container 10 is specifically 3-20L, more specifically 3-10L.
- the outer diameter of the body portion 12 is set to 120 to 360 mm, for example.
- the length V of the concave portion 14 in the central axis direction is not particularly limited, and is set to 4 to 15 mm.
- a liquid feeding tube (not shown) is inserted straight from the cylinder port 11 to the round bottom part 15, and its tip is positioned with a slight gap on the inner wall surface of the top part of the round bottom part 15. .
- the liquid remaining in the container 10 accumulates at the top of the substantially hemispherical round bottom portion 15 .
- the bottom surface of the container 10 has a substantially hemispherical shape, so that the inner wall surface of the round bottom portion 15 Since the applied pressure is dispersed, deformation of the bottom surface is suppressed.
- the radius of curvature of the inner wall surface of the round bottom portion 15 is preferably 1 to 5 times, more preferably 1 to 4 times, the value obtained by dividing the outermost circumference length D by 2 ⁇ (that is, the radius of the trunk portion 12c). , 1 to 3 times.
- FIG. 2(a) A perspective view of the container assembly 100 of the present invention is shown in FIG. 2(a), and an exploded perspective view thereof is shown in FIG. 2(b).
- a container assembly 100 comprises a container 10 , a support base 20 and a handle 30 .
- the support base 20 and the handle 30 are also made of resin like the container 10 .
- the support base 20 has a flat cylindrical shape as a whole and is open at its upper end. Further, the outer diameter of the support base 20 is the same as the outermost diameter of the body portion 12 of the container 10 .
- a claw portion 21 extends upward from the side wall portion of the support base 20 at a position corresponding to the recess 14 on the peripheral edge of the opening of the support base 20 .
- the claw portion 21 is curved like a hook toward the central axis side of the support base 20 . Since the support base 20 is made of resin, the claw portion 21 has some flexibility. As a result, when the container 10 and the support base 20 are connected, the claw portion 21 abuts on the upper end portion of the round bottom portion 15 and bends.
- the outer diameter of the support base 20 may be smaller than the outermost diameter of the main body portion 12 .
- the handle 30 is ring-shaped and has a circular opening. and a handle portion 32 extending in the direction of extending the .
- the annular portion 31 has a mounting hole 31a through which the neck portion 12b is passed, and a female screw 31b provided on the inner wall surface of the annular portion 31.
- a finger hooking hole 32a for passing a finger through the grip portion 32 is opened in a circular shape.
- the planes formed by the opening circles of the mounting hole 31a and the finger hooking hole 32a are positioned perpendicular to each other.
- the handle 30 is detachably attached to the container 10 by screwing together the male screw 12b1 and the female screw 31b.
- the handle 30 is attached to the container 10 as necessary, and for example, the operator can lift and carry the container assembly 100 by putting his/her finger through the finger hole 32a when carrying the handle.
- the handle 30 is not formed integrally with the container 10 and is a separate body.
- the container 10 thereby has a point-symmetrical shape with respect to its central axis (except for the male threads 12a 1 and 12b 1 ).
- uneven thickness of the container 10 can be prevented (excluding the pinch-off portion formed in the bottom portion 15 and its vicinity), and deformation during pumping can be effectively suppressed.
- FIGS. 1 and 2 the case where there are four recesses 14 is illustrated, but the number of recesses 14 may be any number, specifically two to six.
- 3A shows an example of two recesses 14
- FIG. 3B shows an example of three recesses 14
- FIG. 3C shows an example of five recesses 14
- FIG. (d) shows an example in which the number of recesses 14 is six.
- Each of these figures is an end view of the container 10 cut between the body portion 12 and the stepped portion 13 and showing the end face facing the stepped portion 13 following FIG. 1(b).
- the material of the container 10 is thermoplastic resin.
- the member constituting the container 10 may have a single-layer structure or a multi-layer structure.
- the bending elastic modulus of the thermoplastic resin forming the container 10 is preferably at least 700 MPa.
- the entire resin forming the multi-layered structure should have the above flexural modulus.
- a container 10 made of a thermoplastic having a flexural modulus of at least 700 MPa can pump liquids with gas up to 200 kPa without causing breakage or significant deformation of the container.
- the flexural modulus can be determined according to JIS K7171 (2016).
- the container 10 has a thinner wall thickness.
- the thickness of the body portion 12c of the container 10 may be 0.8 to 4 mm.
- the material of the container 10 may be a high-purity thermoplastic resin.
- the container 10 has a multi-layered structure, at least the material of its inner surface should be a high-purity thermoplastic resin.
- the container 10 made of high-purity thermoplastic resin is suitable for containing liquids that require a high degree of cleanliness, such as semiconductor materials, semiconductor manufacturing chemicals, and food materials.
- a high-purity thermoplastic resin is a resin in which leaching of impurity fine particles into the liquid contained in the container 10 does not exceed a predetermined reference value. Cleanliness is known as an index representing this reference value.
- the degree of cleanliness indicates the degree to which the quality of the liquid deteriorates due to impure particles seeping into the liquid stored in the container for a long period of time.
- the degree of cleanliness is obtained by storing ultrapure water or photoresist liquid in an inspection container for a certain period of time and then determining the number of fine particles present in 1 mL of the contained liquid.
- the particle size of the fine particles is 0.3, 0.2, 0.1, and/or 0.06 ⁇ m or more, depending on the applicable standard. Specifically, it is defined by the following formula (1).
- a is the capacity of the inspection container
- b is the amount of liquid sampled from the inspection container.
- a sampling liquid for measuring the initial cleanliness is collected as follows. A half of the volume of a (mL) test container, a/2 (mL), of ultrapure water or photoresist solution is put in, shaken for 15 seconds, left to stand for 24 hours, and then sampled. A sampling liquid for measuring the degree of cleanliness after storage is collected after the stopper is attached to the container after the initial degree of cleanliness measurement, left for a certain period of time, and the container is rotated three times so as not to generate air bubbles.
- c is the value obtained by counting the fine particles contained in the total amount of the sampled liquid with a particle counter.
- the initial cleanness and the cleanness after accommodation for a certain period of time are calculated by the formula (1).
- a lower cleanness value indicates that the quality of the photoresist solution is not degraded. If the degree of cleanliness is less than 100 particles/mL, it means that the photoresist solution was accommodated without deterioration in quality. Such photoresist solutions do not degrade the quality and yield of semiconductors and liquid crystal displays (LCDs).
- a resin is selected that satisfies a predetermined degree of cleanliness when the degree of cleanliness is measured using the container 10 as an inspection container.
- a resin having a cleanness of less than 100 particles/mL is used.
- a high-purity thermoplastic resin is a resin that does not exude impurity fine particles into a liquid exceeding a predetermined reference value.
- a resin having a degree of cleanliness of less than 200 particles/mL may be used in accordance with applicable standards.
- a resin having a cleanness of less than 50/mL, less than 10/mL, less than 5/mL, or less than 3/mL may be used.
- a stopper (not shown) of the container is also preferably made of high-purity thermoplastic resin.
- the degree of leaching of impurity fine particles can be defined by the degree of decrease in liquid transparency (another example of a predetermined reference value).
- Examples of resins forming the container 10 include polyolefins such as polyethylene and polypropylene, polyamides, polyvinyl alcohol, poly(ethylene-co-vinyl alcohol), polyesters, and polyphenylene oxides. One or two or more of these resins may be used to form a single-layer container, or multiple types of these resins may be used to form a multi-layer structure container.
- polyethylene is preferred. Specific examples include linear polyethylene (LLDPE), which is a copolymer of ethylene and ⁇ -olefin, and high density polyethylene (HDPE). From the viewpoint of rigidity and cleanliness, the container 10 is preferably made of high-density polyethylene. Moreover, from the viewpoint of environmental protection, it is preferable to use a material-recyclable resin.
- the melt flow rate of high density polyethylene is preferably 0.01 to 3.0 g/10 minutes, more preferably 0.05 to 2.0 g/10 minutes. Also, the density thereof is preferably 0.940 to 0.970 g/cm 3 , more preferably 0.950 to 0.960 g/cm 3 .
- the melt flow rate can be determined according to JIS K6760 (1995).
- At least the surface of the inner wall of the container 10 may be made of polyethylene or ethylene/ ⁇ -olefin copolymer resin having a density of 0.940 to 0.970 g/cm 3 .
- This resin has a weight average molecular weight of 10 ⁇ 10 4 to 30 ⁇ 10 4 as measured by gel permeation chromatography, a polymer content of less than 2.5% by mass having a molecular weight of 1 ⁇ 10 3 or less, and It is preferable that the content of each of the neutralizing agent, the antioxidant, and the light stabilizer, which are quantified by liquid chromatography, is 0.01% by mass or less.
- the ⁇ -olefin may be at least one selected from the group consisting of propylene, butene-1, 4-methyl-pentene-1, hexene-1, and octene-1.
- a resin With such a resin, it is possible to obtain the container 10 that exhibits high mechanical strength, is excellent in handleability, and has very little exudation of impurity fine particles into the contained liquid.
- the material of the container 10 is polyethylene or ethylene/ ⁇ -olefin copolymer resin having a density of 0.940 to 0.970 g/cm 3 , a neutralizer, an antioxidant, a light stabilizer, an inorganic pigment and/or Alternatively, it may be a resin composition containing a light-shielding pigment containing an organic pigment and an olefinic polymer dispersant having a number average molecular weight of 2 ⁇ 10 3 or more. This resin preferably has a weight average molecular weight of 10 ⁇ 10 4 to 30 ⁇ 10 4 as measured by gel permeation chromatography, and a molecular weight of 1 ⁇ 10 3 or less is less than 5 mass %.
- the content of the neutralizing agent, antioxidant, and light stabilizer in the resin composition is preferably 0.01% by mass or less.
- the inorganic pigment include at least one selected from titanium oxide, carbon black, and red iron oxide
- examples of the organic pigment include at least one selected from phthalocyanine, quinacridone, and azo organic pigments.
- the content of the light-shielding pigment in the resin composition is preferably 0.01 to 5% by mass.
- the content of the olefinic polymer dispersant is preferably less than 5% by mass. According to such a resin composition, the container 10 exhibits high mechanical strength, is excellent in handleability, causes very little seepage of impurity fine particles into the contained liquid, and can prevent deterioration of the liquid caused by light. is obtained.
- Such a container 10 is suitably used for semiconductor manufacturing chemicals and the above-mentioned pharmaceutical manufacturing solvents.
- the container 10 may have a layered structure of an inner layer, an intermediate layer and an outer layer.
- the inner layer is composed of olefin polymers exemplified by ethylene, propylene, butene-1, 4-methyl-pentene-1, hexene-1, and octene-1, and copolymers of ethylene and other olefins. It is preferably made of a high-purity resin containing at least one selected from the group consisting of a neutralizing agent, an antioxidant, and a light stabilizer. In this case, the contents of the neutralizing agent, the antioxidant and the light stabilizer are each preferably at most 0.01% by weight.
- the intermediate layer preferably comprises a solvent barrier resin comprising poly(ethylene-co-vinyl alcohol).
- an adhesive resin layer made of maleic acid-modified polyethylene or the like may be provided between the inner layer and the intermediate layer and/or between the intermediate layer and the outer layer.
- the outer layer preferably contains a resin composition containing a light-shielding substance.
- the resin composition contains less than 5% by mass of a pigment dispersant comprising an olefin polymer such as polyethylene and polypropylene having a number average molecular weight of 2 ⁇ 10 3 or more, and an inorganic pigment and/or an organic pigment. From 0.01 to 5% by weight of the pigment may be included and less than 2.5% by weight of the UV absorber may be included.
- fine particles and metal ions do not leach from the container 10 during storage and transportation of the liquid, so that the quality of the high-purity liquid can be maintained, and the container 10 that is hard to break and lightweight can be obtained.
- the material of the support base 20 and the handle 30 is not particularly limited, and may be the same as or different from the material of the container 10.
- low density polyethylene medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, polybutene, polystyrene, polyvinyl acetate, polymethyl methacrylate, polyethyl methacrylate, polyacrylic acid, cyclic polyolefin, polyacrylonitrile , polyesters such as polyamide (nylon), polyethylene terephthalate and polybutylene terephthalate, polyurethanes, polycarbonates, polyimides, polyphenylene sulfides, polyvinyl chloride homopolymers and/or copolymers and/or Polymer blends are included.
- blow molding is mentioned as a method of manufacturing container 10
- known blow molding methods such as injection blow molding (injection blow molding), multilayer extrusion blow molding, and stretch blow molding are alternatively used. can be adopted. Injection molding is preferable for the manufacturing method of the support base 20 and the handle 30 .
- liquid chemicals such as, for example, methanol, ethanol, isopropanol, isobutanol, ethylene glycol, acetone, ethyl acetate, toluene, dimethylformamide, ethylene glycol acetate, methoxypropyl acetate, and butyl cellosolve; Chemicals for manufacturing semiconductors and liquid crystal devices, such as photoresist solutions and detergents; Medical and pharmaceutical chemicals, such as disinfectants, infusion solutions, dialysates, and raw materials for drug products; Foods, such as fragrances, concentrates, and food additives industrial chemicals;
- Example 1 A high-density polyethylene resin (melt flow rate 0.3 g/10 min, density 0.951 g/cm 3 , flexural modulus 1370 MPa), which is the material of the container 10, was melted and extruded by an extruder to form a parison.
- the container 10 of Example 1 was produced by sandwiching this parison between two split molds and performing direct blow molding.
- the container 10 has four recesses 14, each having a circumferential length H of 25 mm and a central axial length V of 6 mm. were separated by 30° from each other.
- the outermost circumference D of the body portion 12 was 160 ⁇ mm, and the ratio of the circumferential length H of the four recesses 14 to the outermost circumference D, that is, the occupation ratio (H ⁇ N/D ⁇ 100) was 20%.
- support 20 and handle 30 were produced by injection molding.
- a container assembly 100 was produced by connecting the support base 20 to the container 10 and attaching the handle 30 to the container 10 by screwing.
- the length from the upper end of the body portion 12 of the container 10 to the lower end of the round bottom portion 15 was measured as the total height of the container 10 under normal pressure using a height gauge (manufactured by Mitutoyo Co., Ltd.).
- a pressurizing device was attached to the nozzle 11 and the upper end 12a to raise the internal pressure of the container 10 to 200 kPa and keep it constant for 1 hour. After 1 hour, the total height of the container 10 was measured again and recorded as the total height at high pressure. When the ratio of the total height under high pressure to the total height under normal pressure of the container 10 was obtained as the total height change rate, it was 0.61%.
- Example 2 A container 10 of Example 2 was produced in the same manner as in Example 1, except that the circumferential length H of the recesses 14 was changed to 35 mm and the occupation rate of the four recesses 14 was changed to 28%. Also, the support base 20 and the handle 30 were produced in the same manner as in the first embodiment. A container assembly 100 was produced by connecting the support base 20 to the container 10 and attaching the handle 30 to the container 10 by screwing. The container 10 was operated in the same manner as in Example 1, and the shape change at high pressure was measured, and the total height change rate was found to be 0.69%.
- Example 3 A container 10 of Example 3 was produced in the same manner as in Example 1, except that six concave portions 14 were arranged at intervals of 60° from each other and the occupation rate was changed to 30%. Also, the support base 20 and the handle 30 were produced in the same manner as in the first embodiment. A container assembly 100 was produced by connecting the support base 20 to the container 10 and attaching the handle 30 to the container 10 by screwing. The container 10 was operated in the same manner as in Example 1, and the shape change at high pressure was measured, and the total height change rate was found to be 0.69%.
- Example 4 A container 10 of Example 4 was produced in the same manner as in Example 3, except that the circumferential length H of the recesses 14 was changed to 35 mm and the occupation ratio of the six recesses 14 was changed to 42%. Also, the support base 20 and the handle 30 were produced in the same manner as in the first embodiment. A container assembly 100 was produced by connecting the support base 20 to the container 10 and attaching the handle 30 to the container 10 by screwing. The container 10 was operated in the same manner as in Example 1, and the shape change at high pressure was measured, and the total height change rate was found to be 0.86%.
- Example 5 The outermost circumference length D was changed to 360 ⁇ mm, the circumferential length H of the recesses 14 was changed to 50 mm and the occupancy rate of the six recesses 14 was changed to 27%, and the central axis direction length V was changed to 10 mm.
- a container 10 of Example 5 was produced in the same manner as in Example 3 except for the above. Also, the support base 20 and the handle 30 were produced in the same manner as in the first embodiment.
- a container assembly 100 was produced by connecting the support base 20 to the container 10 and attaching the handle 30 to the container 10 by screwing. The container 10 was operated in the same manner as in Example 1 to measure the change in shape at high pressure, and the rate of change in total height was found to be 1.03%. Further, when the remaining liquid amount was measured in the same manner as in Example 1, it was 0.6 mL.
- Comparative example 1 As shown in FIG. 4, one recessed portion 14 is arranged at an angle of 90° away from the boundary between the main body portion 12 and the stepped portion 13 on the parting line PL.
- a container 10 of Comparative Example 1 was produced in the same manner as in Example 1 except that the occupation ratio of was changed to 5%.
- the support base 20 and the handle 30 were produced in the same manner as in the first embodiment.
- a container assembly 100 was produced by connecting the support base 20 to the container 10 and attaching the handle 30 to the container 10 by screwing. When the container 10 was operated in the same manner as in Example 1 to increase the internal pressure of the container 10 to 200 kPa, the support base 20 was removed from the container 10 . Therefore the total height change was not measured.
- a circumferential groove 44 is provided over the entire circumference of the lower end of the body portion 42, and the occupancy rate of the circumferential groove 44 is changed to 100%.
- a container 40 of Comparative Example 2 was produced in the same manner as in Example 1 except that the was integrally molded.
- a container assembly 100 was produced by connecting the support base 20 produced by operating in the same manner as in Example 1 to the container 40 .
- the container 40 was operated in the same manner as in Example 1, and the shape change at high pressure was measured, and the total height change rate was found to be 5.11%. Further, when the remaining liquid amount was measured by operating in the same manner as in Example 1, it was 2.2 mL.
- Comparative Example 3 A container 40 of Comparative Example 3 was produced in the same manner as in Comparative Example 2, except that the outermost circumference D was changed to 360 ⁇ mm.
- the container assembly 100 was produced by connecting the support base 20 produced by operating in the same manner as in Comparative Example 2 to the container 40 .
- the container 40 was operated in the same manner as in Example 1, and the shape change at high pressure was measured, and the total height change rate was 7.37%.
- Comparative Example 4 As shown in FIG. 5(b), by operating in the same manner as in Comparative Example 2 except that the concave portion 14 was not provided and the flat bottom portion 45 was formed in place of the round bottom portion 15, a comparative A container 40 of Example 4 was made.
- the container 40 was operated in the same manner as in Example 1 to increase the internal pressure of the container to 200 kPa, the flat bottom portion 45 swelled and the container 40 collapsed.
- the total height change rate of the overturned container 40 was obtained, it was 4.10%.
- Table 1 summarizes the configurations of the containers 10 in Examples 1 to 5 and the containers in Comparative Examples 1 to 4, and the results of shape change measurement and residual liquid amount measurement at high pressure.
- the container and container assembly of the present invention are suitably used, for example, for pumping liquids in the semiconductor and liquid crystal device manufacturing fields, the pharmaceutical field, and the food field, where liquids of clean quality are required.
- 10 is a container, 11 is a mouthpiece, 12 is a main body, 12a is an upper end, 12a1 is a male screw, 12b is a neck, 12b1 is a male screw, 12c is a body, 13 is a stepped portion, 14 is a recess, and 15 20 is a round bottom portion, 20 is a support base, 21 is a claw portion, 30 is a handle, 31 is an annular portion, 31a is a mounting hole, 31b is a female screw, 32 is a handle portion, 32a is a finger hooking hole, 40 is a container, and 40a is 42 is a main body, 44 is a circumferential groove, 45 is a flat bottom, 100 is a container assembly, C is the central axis, D is the outermost circumference length, H is the circumferential length, h is the center point, and PL is the parting.
- a line, V is the length in the central axis direction
- X and Y are reference lines
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
- Catching Or Destruction (AREA)
- Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
Abstract
Description
容器10の材料である高密度ポリエチレン樹脂(メルトフローレート0.3g/10分、密度0.951g/cm3、曲げ弾性率1370MPa)を熱溶融してエクストルーダーによって押し出してパリソンを形成した。このパリソンを二分割金型で挟んでダイレクトブロー成形により実施例1の容器10を作製した。この容器10は4個の凹部14を有しており、その周方向長さHは25mm、中心軸方向長さVは6mm、パーティングラインPL上の本体部12と段差部13との境界箇所から夫々30°離れていた。本体部12の最外周長Dは160πmm、最外周長Dに対する4個の凹部14の周方向長さHの割合、すなわち占有率(H×N/D×100)は20%であった。
容器10の本体部12の上端から丸底部15の下端までの長さを、ハイトゲージ(株式会社ミツトヨ製)を用い、容器10の常圧時全高として測定した。筒口11及び上端部12aに加圧装置を取り付け、容器10の内圧を200kPaに昇圧し、これを1時間一定に保った。1時間経った時点で容器10の全高を再度測定し、高圧時全高として記録した。容器10の常圧時全高に対する高圧時全高の割合を全高変化率として求めたところ、0.61%であった。
容器10に水道水2Lを収容し、送液管(不図示)を筒口11から真っ直ぐに容器10内に挿し込んで、それの末端を丸底部15の内壁面近傍に位置するように固定した。0.05MPaの圧力を容器10内に印加して水道水を容器10から排出し、送液管から水道水が出なくなったところで圧力の印加を止め、容器10内に残った水道水の量を測定したところ、0.3mLであった。
凹部14の周方向長さHを35mmに変更し、4個の凹部14の占有率を28%に変更したこと以外は実施例1と同様に操作して実施例2の容器10を作製した。また実施例1と同様にして支持台20及び把手30を作製した。支持台20を容器10に連結し、把手30を容器10に螺合によって取り付けて容器組立体100を作製した。容器10につき、実施例1と同様に操作して高圧時の形状変化を測定し、全高変化率を求めたところ、0.69%であった。
凹部14を互いに60°ずつ離れた60°間隔で6個としてこれの占有率を30%に変更したこと以外は実施例1と同様に操作して実施例3の容器10を作製した。また実施例1と同様にして支持台20及び把手30を作製した。支持台20を容器10に連結し、把手30を容器10に螺合によって取り付けて容器組立体100を作製した。容器10につき、実施例1と同様に操作して高圧時の形状変化を測定し、全高変化率を求めたところ、0.69%であった。
凹部14の周方向長さHを35mmに変更し、6個の凹部14の占有率を42%に変更したこと以外は実施例3と同様に操作して実施例4の容器10を作製した。また実施例1と同様にして支持台20及び把手30を作製した。支持台20を容器10に連結し、把手30を容器10に螺合によって取り付けて容器組立体100を作製した。容器10につき、実施例1と同様に操作して高圧時の形状変化を測定し、全高変化率を求めたところ、0.86%であった。
最外周長Dを360πmmに変更したこと、凹部14の周方向長さHを50mmとして6個の凹部14の占有率を27%に変更したこと、中心軸方向長さVを10mmに変更したこと以外は実施例3と同様に操作して実施例5の容器10を作製した。また実施例1と同様にして支持台20及び把手30を作製した。支持台20を容器10に連結し、把手30を容器10に螺合によって取り付けて容器組立体100を作製した。容器10につき、実施例1と同様に操作して高圧時の形状変化を測定し、全高変化率を求めたところ、1.03%であった。また実施例1と同様に操作して残液量測定を行ったところ、0.6mLであった。
図4に示すように、1個の凹部14をパーティングラインPL上の本体部12と段差部13との境界箇所から角度θ=90°離れて位置するように配置し、1個の凹部14の占有率を5%に変更したこと以外は実施例1と同様に操作して比較例1の容器10を作製した。また実施例1と同様にして支持台20及び把手30を作製した。支持台20を容器10に連結し、把手30を容器10に螺合によって取り付けて容器組立体100を作製した。容器10につき、実施例1と同様に操作して容器10の内圧を200kPaまで昇圧したところ、容器10から支持台20が外れた。そのため全高変化率を測定しなかった。
図5(a)に示すように、凹部14に代えて周回溝44を本体部42の下端の全周にわたって設け、周回溝44の占有率を100%に変更したこと、容器40と把手40aとを一体成形したこと以外は実施例1と同様に操作して比較例2の容器40を作製した。実施例1と同様に操作して作製した支持台20を容器40に連結し容器組立体100を作製した。容器40につき、実施例1と同様に操作して高圧時の形状変化を測定し、全高変化率を求めたところ、5.11%であった。また実施例1と同様に操作して残液量測定を行ったところ、2.2mLであった。
最外周長Dを360πmmに変更したこと以外は、比較例2と同様に操作して比較例3の容器40を作製した。比較例2と同様に操作して作製した支持台20を容器40に連結し容器組立体100を作製した。容器40につき、実施例1と同様に操作して高圧時の形状変化を測定し、全高変化率を求めたところ7.37%であった。
図5(b)に示すように、凹部14を設けず、かつ丸底部15に代えて平底部45を形成したこと以外は比較例2と同様に操作することによって、支持台無しで自立可能な比較例4の容器40を作製した。容器40につき、実施例1と同様に操作して容器の内圧を200kPaまで昇圧したところ、平底部45が膨隆し容器40が倒れた。倒れた容器40の全高変化率を求めたところ、4.10%であった。
Claims (4)
- 液体を収容し、前記液体を圧送するのに用いられる容器であって、
略円筒形をなした本体部と、前記本体部の一端で開口した筒口と、前記本体部の他端に連続しつつ縮径した段差部と、前記段差部に連続してそこから離反するように膨らんだ丸底部とを有しており、
前記本体部、前記段差部、及び前記丸底部にわたった一連のパーティングラインに重ならない位置で窪んでおり、容器を自立させるための支持台の爪部が係合する複数の凹部が前記段差部に間欠して形成されていて、
前記凹部が前記本体部の周方向に長い略長円形をなしており、複数の前記凹部の前記周方向の合計長さが、前記本体部の最外周長の20~50%を占めていることを特徴とする容器。 - 前記凹部は、前記本体部の中心軸における角度が前記パーティングラインから夫々20~45°離れた4箇所、又は互いに60°ずつ離れた6箇所で、かつ前記パーティングラインを挟んだ対称の位置に設けられていることを特徴とする請求項1に記載の容器。
- 請求項1又は2に記載の容器の前記本体部が、胴部と前記筒口寄りで前記胴部よりも縮径した頸部とを有しており、前記頸部の外面に把手が嵌合及び/又は螺合していることを特徴とする容器組立体。
- 請求項1又は2に記載の容器と、前記丸底部を嵌めている開口及びそれの周縁部で延出していて前記凹部に係合している爪部を有していることにより前記容器を自立させている支持台とを、有していることを特徴とする容器組立体。
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JPS5726337U (ja) * | 1980-07-22 | 1982-02-10 | ||
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