Liquid containing tube containing liquid to be supplied

Abstract

As shown in Figure 1, the liquid containing tube (100) containing the supplied liquid according to the present invention has a liquid supply unit (10) and a liquid containing unit (20) in which the supplied liquid (30) that is in contact with the liquid supply unit (10) and a multi-layer follower (40) comprising a plurality of layers are contained in this order from the liquid supply unit (10) side, and the liquid containing unit (20) contains the supplied liquid (30) that is in contact with the liquid supply unit (10) and the multi-layer follower (40) in this order from the liquid supply unit (10) side. The multi-layer following body (40) includes at least a first following body (42) and a second following body (44), the first following body (42) is located closer to the liquid supply unit (10) than the second following body (44), the phase angle of the first following body (42) exceeds 45 degrees, and the phase angle of the second following body (44) is 45 degrees or less.

Description

Technical Field

[0001] The present invention relates to a liquid containing tube containing supplied liquid. Background Art

[0002] Conventionally, in a storage tube for supplying and storing a supplied liquid such as writing ink, liquid cosmetics, or liquid fuel, a follower (follower member) is used to suppress evaporation of the supplied liquid, adhesion to the inner wall of the storage tube, etc. The follower moves toward the supply portion of the supplied liquid following the reduction caused by consumption of the supplied liquid.

[0003] Patent Document 1 discloses a water-based ballpoint pen having a cylindrical ink container with an inner diameter of 3 mm or more or a similar shape, which uses two types of gel-like ink followers having different viscosity characteristics due to different base oil viscosities.

[0004] Patent document 2 discloses a writing tool, wherein oily ink for writing tools is contained in an ink containing tube, a pen tip is mounted on an ink outflow portion at one end of the ink containing tube, and an ink follower is contained in the ink containing tube in a manner in contact with the oily ink. The ink follower is composed of at least a first layer in contact with the oily ink and a second layer in contact with the first layer, the first layer being an aqueous gel-like substance, and the second layer being a low-volatile or non-volatile organic liquid.

[0005] Patent document 3 discloses an ink follower composition comprising at least: one or a mixture of two or more hydrocarbon organic solvents having a specific gravity in the range of 0.8 to 0.9, a gelling agent, and particles that are substantially insoluble or non-swellable in the hydrocarbon organic solvent and have a specific gravity less than that of the hydrocarbon organic solvent.

[0006] Patent Document 4 discloses a follower composition for a cosmetic application device, which is characterized by comprising at least a base oil and 3.5 to 8% by mass of an elastomer containing a styrene structure.

[0007] Patent document 5 discloses a cosmetic application tool, characterized in that it is provided with: a cylindrical filling chamber; an application part, which is installed at the front end of the cylindrical filling chamber; liquid cosmetics, which are directly filled in the cylindrical filling chamber directly connected to the application part or connected to the application part via a clamping member; and a liquid follower, which contacts the liquid cosmetics, moves to follow the reduction caused by the consumption of the liquid cosmetics, and has a different color tone from the liquid cosmetics, and the volume of the follower is 0.5 or more relative to the volume 1 of the liquid cosmetics.

[0008] Patent document 6 discloses a fuel container, characterized in that it comprises: a container body having a flow outlet; a fuel disposed in the aforementioned container body; and a high-viscosity liquid disposed in the aforementioned container body in contact with the aforementioned fuel on the side opposite to the aforementioned flow outlet side.

[0009] Prior art literature

[0010] Patent Literature

[0011] Patent Document 1: Japanese Patent Application Laid-Open No. 6-328890

[0012] Patent Document 2: Japanese Patent Application Publication No. 2001-158869

[0013] Patent Document 3: Japanese Patent Application Publication No. 2005-239918

[0014] Patent Document 4: Japanese Patent Application Publication No. 2017-165670

[0015] Patent Document 5: Japanese Patent Application Publication No. 2016-198395

[0016] Patent Document 6: Japanese Patent Application Publication No. 2004-281340 Summary of the invention

[0017] Problem that the invention aims to solve

[0018] The present invention provides a novel liquid containing tube containing a supplied liquid, which has impact resistance and can suppress adhesion of a follower body to the liquid containing tube due to consumption of the supplied liquid and leakage of the follower body when the follower body is inverted.

[0019] Solutions for solving problems

[0020] The present inventors have conducted intensive research and found that the above-mentioned problems can be solved by the following means, thereby completing the present invention. That is, the present invention is as follows:

[0021] <Method 1> A liquid containing tube containing a supplied liquid, comprising a liquid supply portion and a liquid containing portion,

[0022] The liquid receiving portion contains a supplied liquid in contact with the liquid supply portion and a multi-layered follower body composed of multiple layers in order from the liquid supply portion side.

[0023] The multi-layered follower includes at least a first follower and a second follower, wherein the first follower is located closer to the liquid supply portion than the second follower.

[0024] The phase angle of the first follower measured in accordance with JIS K 7244 exceeds 45°, and

[0025] The second follower has a phase angle measured in accordance with JIS K 7244 of 45° or less.

[0026] <Mode 2> The liquid containing tube containing the supplied liquid according to Mode 1, wherein the first following body is in contact with the supplied liquid.

[0027] <Mode 3> The liquid containing tube containing the supplied liquid according to Mode 1 or 2, wherein the second following body is in contact with the first following body.

[0028] <Mode 4> The liquid containing tube containing the supplied liquid according to any one of Modes 1 to 3, wherein the multi-layered following body is composed of the first following body and the second following body.

[0029] <Mode 5> The liquid containing tube containing a supplied liquid according to any one of Modes 1 to 4, wherein interfaces between the respective followers constituting the multi-layered followers are visually recognizable.

[0030] <Mode 6> The liquid containing tube containing a supplied liquid according to any one of Modes 1 to 5, wherein a difference between the phase angle of the first follower and the phase angle of the second follower is 10° or more.

[0031] <Aspect 7> The liquid containing tube containing the supplied liquid according to any one of aspects 1 to 6, wherein the first follower contains a first base oil and a first thickener.

[0032] <Aspect 8> The liquid containing tube containing the supplied liquid according to aspect 7, wherein the first base oil is at least one selected from the group consisting of polyolefins, liquid paraffin, and mineral oils.

[0033] <Mode 9> The liquid containing tube containing the supplied liquid according to Mode 7 or 8, wherein the first thickener is at least one selected from the group consisting of silica and inorganic salt particles.

[0034] <Aspect 10> The liquid containing tube containing a supplied liquid according to any one of aspects 1 to 9, wherein the second follower contains a second base oil and a second thickener.

[0035] <Aspect 11> The liquid containing tube containing a supplied liquid according to aspect 10, wherein the second base oil is at least one selected from the group consisting of polyolefins, liquid paraffin, and mineral oils.

[0036] <Mode 12> The liquid containing tube containing the supplied liquid according to Mode 10 or 11, wherein the second thickener is an elastomer.

[0037] Effects of the Invention

[0038] According to the present invention, a novel liquid containing tube containing supplied liquid can be provided which has impact resistance and can suppress adhesion of the follower to the liquid containing tube due to consumption of the supplied liquid and leakage of the follower when the follower is placed upside down. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a side cross-sectional view of a liquid containing tube containing a supplied liquid according to the present invention. DETAILED DESCRIPTION

[0040] 《Liquid receiving tube containing supplied liquid》

[0041] like Figure 1 As shown, the liquid containing tube 100 containing a supplied liquid of the present invention comprises a liquid supply part 10 and a liquid containing part 20, in which the supplied liquid 30 in contact with the liquid supply part 10 and a multilayer follower 40 composed of multiple layers are contained in order from the liquid supply part 10 side, the multilayer follower 40 at least includes a first follower 42 and a second follower 44, the first follower 42 is present on the liquid supply part 10 side more than the second follower 44, the phase angle of the first follower 42 measured in accordance with JIS K 7244-10 exceeds 45°, and the phase angle of the second follower 44 measured in accordance with JIS K 7244-10 is less than 45°.

[0042] Here, in the present invention, the "phase angle" is measured in accordance with JIS K 7244-10. Specifically, it can be measured by a strain control method under the conditions of a temperature of 25°C, a shear strain of 1%, and a frequency of 1 Hz.

[0043] The following body whose phase angle exceeds 45° has a property close to that of a viscous body, whereas the following body whose phase angle is 45° or less has a property close to that of an elastic body.

[0044] The follower body close to the viscous body has the advantage of excellent impact resistance. More specifically, when an impact is applied to the liquid receiving tube containing the supplied liquid having the follower body, the impact is absorbed, and as a result, the supplied liquid can be prevented from penetrating the follower body and leaking to the outside. On the other hand, when the follower body moves with the consumption of the supplied liquid, it adheres to the wall of the liquid receiving tube, and as a result, the follower body sometimes cannot protect the supplied liquid. In addition, when the follower body is placed upside down, specifically, when the follower body is placed under the supplied liquid, the shape of the follower body changes due to the influence of gravity, and sometimes leaks out through the wall of the liquid receiving tube.

[0045] In addition, although the follower body close to the elastic body suppresses the problem of adhesion to the wall of the above-mentioned liquid containing tube, its impact resistance is insufficient. Sometimes, due to the impact force applied to the liquid containing tube containing the supplied liquid having the follower body, the supplied liquid penetrates the follower body and leaks.

[0046] On the other hand, the present inventors have found that the combination of the following body having such properties has impact resistance and can suppress the following body from adhering to the liquid containing tube due to consumption of the supplied liquid and from leaking out when the following body is inverted.

[0047] From the viewpoint of obtaining the above-mentioned effects well, the difference between the phase angle of the first follower and the phase angle of the second follower is preferably 10° or more. The difference may be 15° or more, 20° or more, 25° or more, or 30° or more.

[0048] Hereinafter, each constituent element of the present invention will be described.

[0049] <Liquid supply unit and liquid storage unit>

[0050] The liquid supply part is a member for supplying the supplied liquid to the outside of the liquid containing tube. The liquid containing part is a member for containing the supplied liquid. The liquid supply part and the liquid containing part can be connected.

[0051] The material constituting the liquid receiving portion is not particularly limited, and resins such as polypropylene, paper, metals, etc. can be used. In addition, as the material, biomass plastics derived from biological resources such as corn and sugar cane, biodegradable plastics using soil biodegradable resins and marine biodegradable resins can also be used.

[0052] For example, when the liquid containing tube containing the supplied liquid of the present invention is a refill for a writing instrument, the liquid supply portion and the liquid containing portion of the present invention may be a writing portion and an ink containing portion.

[0053] 〈Liquid supplied〉

[0054] The supplied liquid may be any supplied liquid, for example, ink, liquid fuel, liquid cosmetics, etc.

[0055] In addition, the ink may be water-based ink, oil-based ink, or gel ink.

[0056] Here, water-based ink generally refers to ink containing at least water and a coloring material, oil-based ink refers to ink containing at least an organic solvent and a coloring material, and gel ink refers to water-based ink further containing a viscosity modifier.

[0057] Multi-layered follower

[0058] The multi-layer follower is a follower composed of multiple layers. The multi-layer follower includes at least a first follower and a second follower.

[0059] From the viewpoint of obtaining good impact resistance, the first following body in the present invention is preferably in contact with the supplied liquid.

[0060] From the viewpoint of suppressing adhesion of the following body to the liquid containing tube due to consumption of the supplied liquid and leakage of the following body when the following body is inverted, it is preferred that the second following body in the present invention is in contact with the first following body.

[0061] The multi-layer follower may be composed of a first follower and a second follower.

[0062] The interface between the followers constituting the multi-layer followers may not be clearly visually identifiable like the color gradient, but it may be clearly visually identifiable. In addition, at least one follower may be colored with a color material that is insoluble or insoluble in the supplied liquid. When multiple followers are colored, it is preferred to set them to different colors from the perspective of design and visual recognition. The interface that can be clearly visually identified can be obtained, for example, by increasing the difference between the phase angle of the first follower and the phase angle of the second follower, for example, by setting it to 10° or more.

[0063] (First follower)

[0064] The first following body is a following body that exists on the liquid supply portion side relative to the second following body.

[0065] The phase angle of the first follower measured in accordance with JIS K 7244 exceeds 45°. The phase angle may be 47° or more, 50° or more, 52° or more, 55° or more, or 60° or more.

[0066] The first follower may contain a first base oil and a first thickener.

[0067] As the first base oil, mineral oil, synthetic hydrocarbon oil, ester oil, polyglycol oil, etc. can be used. These can be used alone or in combination.

[0068] As the mineral oil, spindle oil, vaseline, etc. can be used.

[0069] As the synthetic hydrocarbon oil, polyolefins such as polybutene, olefin oligomers, aromatic hydrocarbons, liquid paraffin, and the like can be used.

[0070] As the ester oil and the polyethylene glycol oil, those generally used as followers can be used.

[0071] From the viewpoint of obtaining the above-mentioned phase angle, the first thickener is preferably at least one thickener selected from the group consisting of silica and inorganic salt particles. These may be used alone or in combination.

[0072] As the inorganic salt particles, for example, clay minerals such as kaolinite, montmorillonite, sericite, illite, glauconite, chlorite, talc, and zeolite, and water-insoluble metal soaps such as lithium stearate, aluminum stearate, and sodium stearate can be used.

[0073] The content of the first thickener relative to the mass of the first follower may be 1 mass % or more, 2 mass % or more, 3 mass % or more, or 10 mass % or less, 9 mass % or less, 8 mass % or less, 7 mass % or less, or 6 mass % or less.

[0074] The first follower body can be obtained by kneading the materials constituting the first follower body while heating them using a kneading device such as a planetary mixer or an open roll mill, and then cooling the kneaded materials.

[0075] At this time, the phase angle can be increased by changing the composition ratio of the follower, the production conditions, etc. Specifically, the phase angle can be increased by increasing the cooling rate or the stirring intensity.

[0076] The Second Follower

[0077] The second following body is a layer existing on the opposite side of the liquid supply part with respect to the first following body.

[0078] The first follower has a phase angle of 45° or less measured in accordance with JIS K 7244. The phase angle may be 42° or less, 40° or less, 37° or less, 35° or less, 33° or less, or 30° or less.

[0079] The second follower may contain a second base oil and a second thickener.

[0080] As the second base oil, the base oils listed with respect to the first base oil can be used.

[0081] As the second thickener, an elastomer is preferably used from the viewpoint of obtaining the above-mentioned phase angle.

[0082] As the elastomer, for example, olefin-based thermoplastic elastomers such as ethylene-ethylene-butylene-ethylene block copolymers, styrene-based thermoplastic elastomers such as styrene-ethylene-butylene-styrene block copolymers, vinyl chloride-based thermoplastic elastomers, polyamide-based thermoplastic elastomers, polyester-based thermoplastic elastomers, and polyurethane-based thermoplastic elastomers can be used. These can be used alone or in combination.

[0083] The content of the second thickener relative to the mass of the second follower may be 1 mass % or more, 2 mass % or more, 3 mass % or more, or 4 mass % or less, and may be 10 mass % or less, 9 mass % or less, 8 mass % or less, 7 mass % or less, or 6 mass % or less. In particular, when the second thickener is an elastomer, the content of the elastomer is preferably 2 mass % or more from the viewpoint of obtaining the above-mentioned phase angle.

[0084] The second follower body can be manufactured by the method listed for the first follower body.

[0085] At this time, the phase angle can be increased by changing the composition ratio of the follower, the production conditions, etc., and the phase angle can be reduced by a method opposite to the above-mentioned change to increase the phase angle, specifically, by slowing down the cooling rate or reducing the stirring intensity.

[0086] 〈Other structures〉

[0087] The liquid receiving tube containing the supplied liquid of the present invention may also have any other structure. As another structure, for example, a solid body buried in the following body such as a following rod may be used. The following rod may exist in a manner buried in the multi-layer following body. More specifically, a plurality of following rods may exist in a manner buried in each of the following bodies constituting the multi-layer following body, or a following rod may be buried by penetrating the multi-layer following body.

[0088] Example

[0089] The present invention will be specifically described using Examples and Comparative Examples, but the present invention is not limited to these.

[0090] 《Manufacturing of a liquid receiving tube containing a supplied liquid》

[0091] The first base oil and the first thickener having the types and amounts shown in Table 1 were kneaded using a planetary mixer and then further kneaded using an open roll mill to prepare a first follower.

[0092] Separately, the second base oil and the second thickener of the types and amounts shown in Table 1 were kneaded using a planetary mixer, and then further kneaded using an open roll mill to prepare a second follower.

[0093] The details of the base oils shown in Table 2 are as follows:

[0094] Polybutene A: POLYBUTENE 015N, NOF Co., Ltd.

[0095] Polybutene B: POLYBUTENE 30N, NOF Co., Ltd.

[0096] Mineral oil A: DIANAPROCESS OIL PW-90, Idemitsu Kosan Co., Ltd.

[0097] Mineral oil B: DIANA PROCESS OIL PW-90, Idemitsu Kosan Co., Ltd.

[0098] Aromatic: BARREL PROCESS OIL B-05, Matsumura Oil Co., Ltd.

[0099] Paraffin: BARREL PROCESS OIL P-2200, Matsumura Oil Co., Ltd.

[0100] The thickeners shown in Table 1 are as follows:

[0101] Elastomer A: DYNARON 6200P, JSR Corporation

[0102] Elastomer B: DYNARON 8300P, JSR Corporation

[0103] Inorganic salt: lithium stearate

[0104] Silica A: AEROSIL R202, Evonik

[0105] Silica B: AEROSIL NY50L, Evonik

[0106] In the liquid containing tube shown in Table 1, the ink shown in the column "Supplied Liquid (Ink)" in Table 1 was sealed as the supplied liquid, and then the first follower body and the second follower body were sealed in sequence to prepare a pen core filled with ink.

[0107] In addition, for each of the obtained followers, the phase angle was measured by a strain control method under the conditions of a temperature of 25° C., a shear strain of 1%, and a frequency of 1 Hz in accordance with JIS K 7244-10.

[0108] The aqueous ink refers to an ink that uses water as a main solvent and contains at least a colorant, and in the column of “Supplied Liquid (Ink)” in Table 1, “aqueous” is mentioned.

[0109] In the column of “Supply Liquid (Ink)” in Table 1, “Gel” means an ink using water as a main solvent and containing at least a colorant and a viscosity modifier.

[0110] In the column of “Supply Liquid (Ink)” in Table 1, “Oil-based” refers to an ink that uses an organic solvent as a main solvent and contains at least a colorant.

[0111] In the column of "housing tube" in Table 1, "PP" means a pen core having an ink housing portion made of polypropylene (inner diameter 5 mm).

[0112] In the column of "container tube" in Table 1, "paper" means a pen core (inner diameter 5 mm) having an ink container having a paper layer as a base layer.

[0113] In the column of "housing tube" in Table 1, "metal" means a pen core having a metal ink container (inner diameter 5 mm).

[0114] "evaluate"

[0115] 〈Impact resistance〉

[0116] A 10 g weight was attached to the rear end of the obtained ink-filled pen core, and the pen core was dropped from a height of 1 m with the pen tip facing upward. The pen core was observed from the outside, or the pen core was disassembled in the length direction with a cutter and observed. The state of the ink and the follower was visually confirmed, thereby confirming the state of the follower. The evaluation criteria are as follows.

[0117] A: It is not possible to confirm that ink is mixed into the follower.

[0118] B: The shape of the interface between ink and the follower is distorted.

[0119] C: The ink penetrates the interior of the follower.

[0120] 〈Wall Attachment of Follower〉

[0121] Use the prepared ink-filled refill to write until the ink filling volume reaches 5-10% of the initial amount, observe the refill from the outside, or use a knife to disassemble the refill in the length direction for observation, visually confirm the state of the ink and the follower, and thereby confirm whether the follower is attached to the wall surface. The evaluation criteria are as follows.

[0122] A: Adhesion of the follower to the wall surface was not confirmed.

[0123] B: Adhesion of the following body to the wall surface was observed, but the filling length of the following body after writing was 70% or more of the initial filling length.

[0124] C: The following body is observed to be attached to the wall surface, and the filling length of the following body of the writing instrument is less than 70% of the initial filling length.

[0125] 〈Leakage resistance〉

[0126] The prepared ink-filled refill was arranged so that the follower body was located below the ink, and it was left for 90 days. The refill was observed from the outside, or the refill was disassembled in the length direction with a cutter and observed, and the state of the ink and the follower body was visually confirmed, thereby confirming the droop of the follower body toward the wall surface. The evaluation criteria are as follows.

[0127] A: No change from the state before placement was observed.

[0128] B: The droop of the follower body can be clearly identified.

[0129] C: The follower body droops to the vicinity of the inlet of the lead.

[0130] Table 1 shows the configurations and evaluation results of Examples and Comparative Examples.

[0131] [Table 1]

[0132]

[0133] As can be seen from Table 1, the ink-filled refill of the embodiment in which the phase angle of the first follower exceeds 45° and the phase angle of the second follower is 45° or less has impact resistance and can suppress the adhesion of the follower to the wall surface accompanied by the consumption of the supplied liquid and the leakage of the follower when it is inverted.

[0134] Description of Reference Numerals

[0135] 100 a liquid receiving tube containing a supplied liquid

[0136] 10 Liquid supply unit

[0137] 20 Liquid storage unit

[0138] 30 Supplied liquid

[0139] 40 Multi-layered follower

[0140] 42 First Follower

[0141] 44 Second Follower

Claims

1. A liquid containing tube containing a supplied liquid, comprising a liquid supply portion and a liquid containing portion, The liquid containing part contains the supplied liquid in contact with the liquid supply part and the multi-layered following body composed of multiple layers in order from the liquid supply part side. The multi-layered follower includes at least a first follower and a second follower, wherein the first follower is located closer to the liquid supply portion than the second follower. The phase angle of the first follower measured in accordance with JIS K 7244 exceeds 45°, and The second follower has a phase angle of 45° or less measured in accordance with JIS K 7244.

2. The liquid containing tube containing the supplied liquid according to claim 1, wherein: The first following body is in contact with the supplied liquid.

3. The liquid containing tube containing the supplied liquid according to claim 1 or 2, wherein: The second following body is in contact with the first following body.

4. The liquid containing tube containing the supplied liquid according to claim 1 or 2, wherein: The multi-layer follower is composed of the first follower and the second follower.

5. The liquid containing tube containing the supplied liquid according to claim 1 or 2, wherein: The interfaces between the followers constituting the multi-layered followers can be visually recognized.

6. The liquid containing tube containing the supplied liquid according to claim 1 or 2, wherein: A difference between the phase angle of the first follower and the phase angle of the second follower is 10° or more.

7. The liquid containing tube containing the supplied liquid according to claim 1 or 2, wherein: The first follower contains a first base oil and a first thickener.

8. The liquid containing tube containing the supplied liquid according to claim 7, wherein: The first base oil is at least one selected from the group consisting of polyolefins, liquid paraffin and mineral oil.

9. The liquid containing tube containing the supplied liquid according to claim 7 or 8, wherein: The first thickener is at least one selected from the group consisting of silicon dioxide and inorganic salt particles.

10. The liquid containing tube containing the supplied liquid according to claim 1 or 2, wherein: The second follower contains a second base oil and a second thickener.

11. The liquid containing tube containing the supplied liquid according to claim 10, wherein: The second base oil is at least one selected from the group consisting of polyolefins, liquid paraffin and mineral oil.

12. The liquid containing tube containing the supplied liquid according to claim 10 or 11, wherein: The second thickener is an elastomer.

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