Liquid housing container

Abstract

To keep high impact strength in using a recycled plastic material for a liquid housing container.SOLUTION: A liquid housing container includes a housing part for housing a liquid, a supply part for supplying the liquid housed in the housing part to the outside, and a protection member for protecting the supply part. The protection part includes a recycled plastic material or a resin material in which the recycled plastic material is mixed, and has a part satisfying a relation ship of 1<A / B<7 between a side surface width A of the protection member positioned on a first end side and a side surface width B of the protection member positioned on a side of the housing part on the opposite side of the first end side.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present disclosure relates to a liquid storage container capable of storing a liquid such as ink.

Background Art

[0002] From the perspective of environmental consideration, products using recycled plastic materials are being manufactured. Generally, as a problem of using recycled plastic materials during molding, the impact absorption performance deteriorates when the recycled plastic material molded product is dropped and collided. In particular, when using recycled plastic materials for a large-capacity type liquid storage container of an inkjet recording apparatus (liquid ejection apparatus), the influence is great.

[0003] Recycled plastic materials are made from materials that have experienced at least some deterioration due to the heat history during molding, stress, heat, light, solvents, etc. under such circumstances, it is known that the physical properties are different from virgin materials. For example, regarding the impact absorbability in which the molecular chains inside the material bend themselves to relieve the force when an impact is applied, there is a tendency to deteriorate. This tendency can be confirmed by a Charpy impact test, and a molded material containing a recycled plastic material shows a lower impact strength than a virgin material. Such deterioration of impact absorbability is due to the fact that the original molecular chains have been cut due to the above-mentioned deterioration, resulting in a decrease in the impact relaxation effect of the molecular chains themselves.

[0004] Patent Document 1 describes a configuration in which sufficient rigidity is provided to an ink cartridge body molded from a soft synthetic resin material. Specifically, while a ridge is projected at the peripheral wall corner of the ink cartridge body and the opening edge is formed thick, a ridge is projected in the longitudinal direction on the inner surface side of the lid body, and a protrusion is formed by projection molding.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] When a recycled plastic material is used as the material of a liquid storage container, as described above, the impact strength tends to be lower than that of a virgin material. In particular, when there is a protruding portion on the end side of the liquid storage container as in Patent Document 1, if the container is accidentally dropped and the protruding portion is directly impacted, there is a possibility that the protruding portion on the end side may develop into a chip or crack.

[0007] An object of the present disclosure is to maintain a high impact strength even when a recycled plastic material is used for a liquid storage container.

Means for Solving the Problems

[0008] A liquid storage container according to an aspect of the present disclosure includes a storage portion for storing a liquid, a supply portion for supplying the liquid stored in the storage portion to the outside, and a protection member for protecting the supply portion, wherein the protection member contains a recycled plastic material or a resin material mixed with a recycled plastic material, and in a state where the protection member is assembled to the supply portion, a relationship between a side width A of the protection member located on the first end side and a side width B of the protection member located on the storage portion side opposite to the first end side satisfies 1 < A / B < 7.

Effects of the Invention

[0009] Even when a recycled plastic material is used for the liquid storage container, it is possible to maintain a high impact strength.

Brief Description of the Drawings

[0010]

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Best Mode for Carrying Out the Invention

[0011] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the present disclosure, and not all combinations of features described in the following embodiments are essential for the solution means of the present disclosure. The same reference numerals are assigned to the same components. In this specification, as an example of the use of the liquid storage container, the case of replenishing a liquid (ink) to a liquid ejection device (inkjet recording device) will be described, but the use of the liquid storage container is not limited thereto. The liquid stored in the liquid storage container is not limited to ink, and may be, for example, a predetermined processing liquid or the like.

[0012] <<First Embodiment>> The recycled plastic material described in this embodiment is used in a broad sense and includes post-consumer materials (PCR materials) and pre-consumer materials. Post-consumer materials (PCR materials) are materials obtained by collecting and recycling plastic products after they have been distributed in the market. For example, PCR materials are plastics prepared from cleaned and shredded waste items. PCR materials may also be thermoplastic plastics prepared from waste industrial plastics by parties other than the original processor. Pre-consumer materials are materials obtained by collecting and recycling waste plastics generated in the manufacturing process before they are distributed in the market. For example, pre-consumer materials are thermoplastic plastics prepared from cut-off or defective molded products that have been pre-processed by molding, extrusion, etc. in a processor's factory and then re-processed within the same factory. In this embodiment, the recycled plastic material may be a PCR material, a pre-consumer material, or a mixture of both.

[0013] As the recycled plastic material used in this embodiment, it is possible to use a material that has been determined to be a suitable recycled plastic material for use based on the size of contamination (hereinafter referred to as "contamination"). For example, when a thin sample plate is molded and the size of the contamination on its surface is less than a predetermined value, it is determined to be a suitable recycled plastic material for use. This predetermined value is, for example, 1 mm 2 shall be assumed. Note that this value is an example and is not limited to this.

[0014] FIG. 1 is a perspective view of an inkjet recording apparatus 100 which is a liquid ejection apparatus using the liquid supply system according to the present embodiment. In FIG. 1, the inkjet recording apparatus 100 is configured to eject ink from a recording head 104 onto a recording medium S based on image data to record an image (including characters, symbols, etc.). The recording head 104 is mounted on a carriage 102. In the recording operation, the recording medium S is conveyed by a conveyance roller 3 in the conveyance direction (sub-scanning direction) indicated by an arrow A, and at the same time, the carriage 102 is reciprocated in a direction (main scanning direction) intersecting the sub-scanning direction and indicated by an arrow B. By driving the recording head 104 based on image data in synchronization with the movement of the carriage 102, ink is ejected from the recording head 104 onto the recording medium S. The recording medium S is conveyed by a conveyance roller 107 by a predetermined pitch, and recording of the entire recording medium is performed by alternately repeating conveyance by the predetermined pitch and recording for one line. As the recording medium S, those of various materials as described above can be used, and usually, sheet-like materials such as recording paper or a plastic sheet are used.

[0015] On the ejection surface of the recording head 104 facing the recording medium S, an ejection port row composed of a plurality of ejection ports arranged in series in the sub-scanning direction is formed. A plurality of ejection port rows are provided corresponding to the number of types of ink used. In color recording or gradation recording, a desired image is formed by ejecting different inks for each ejection port row. The ink supply to the recording head 104 is performed through an ink supply path 106 such as a tube from an ink supply unit 105 to which a plurality of ink tanks 1 for each color ink are detachably attached. In FIG. 1, an example in which four color ink tanks 1 are mounted is shown, but the example of the ink tank 1 to be mounted is not limited to this, and it may be three colors or less, five colors or more, or one color. Further, it may be in a form of accommodating a liquid other than ink.

[0016] The inkjet recording apparatus 100 of the present embodiment is a so-called serial scanning type printer. As described above, the recording head 104 is scanned in the X direction (main scanning direction) orthogonal to the Y direction (transport direction) in which the recording medium S is transported to record an image. Note that the inkjet recording apparatus may have a so-called line type recording head in which ejection ports extend across the width direction (X direction) of the recording medium S.

[0017] FIG. 2 is a perspective view showing the ink tank 1 according to the present embodiment. The ink tank 1, which is a liquid storage container, stores, as a liquid, pigment ink of a color suitable for the configuration on the recording apparatus side (for example, black, cyan, magenta, and yellow). The ink tank 1 has a tank exterior 4 and a tank cover 5. FIG. 2 shows a state in which the tank cover 5 is assembled to the ink tank 1. The tank exterior 4 of the ink tank 1 is formed by injection blow molding or the like using a virgin material resin such as a polypropylene material (PP material) or a polyethylene material (PE material). Further, each component of the ink tank 1 is assembled using a technique such as ultrasonic welding, thermal welding, adhesion, or fitting.

[0018] The tank exterior 4 functions as an ink storage portion as it is. The ink tank 1 of the present embodiment has an ink storage capacity of about 300 ml. The tank exterior 4 has a substantially rectangular parallelepiped shape. The surfaces of the tank exterior 4 shown in FIG. 1 (the surface on the -X direction side, hereinafter defined as the front) and the surface facing this (the surface on the +X direction side, hereinafter defined as the back) are the surfaces having the maximum area of the rectangular parallelepiped shape. The ink tank 1 of the present embodiment is configured to be detachable from a fixed portion (not shown) of the inkjet recording apparatus 100.

[0019] The tank cover 5 has an opening 9 (see FIG. 3 described later), and a connection port 6 to the inkjet recording device 100 is arranged in the opening 9. In a state where the ink tank 1 is mounted on the inkjet recording device 100, the ink accommodated in the ink tank 1 is supplied to the inkjet recording device 100 through the connection port 6. That is, the ink tank 1 has a supply unit (connection port 6) for supplying the contained liquid.

[0020] The tank cover 5 functions to protect functional parts such as the connection port 6 from external impacts. That is, the tank cover 5 is a protective member for protecting the ink tank 1. In the tank cover 5, the side where the connection port 6 to the inkjet recording device 100 is arranged (the side indicated by the broken line, the +Z direction side) is referred to as the first end side 7 (end side) of the tank cover 5. On the other hand, in the tank cover 5, the side of the tank exterior 4 (the accommodating part side opposite to the first end side 7, the -Z direction side) is also referred to as the second end side 8 (opposite end side). In a state of being mounted on the ink tank 1, the first end side 7 (end side) of the tank cover 5 is a protruding part compared to other parts. Therefore, if the first end side 7 is directly impacted, for example, by the user accidentally dropping it, there is a possibility that it will develop into a chip or crack at the protruding part.

[0021] FIGS. 3 and 4 are perspective views of the tank cover 5. FIG. 3 is a perspective view seen from the end side (that is, the first end side 7) of the entire ink tank 1. FIG. 4 is a perspective view seen from the side of the tank exterior 4 (that is, the second end side 8). The tank cover 5 has an opening 9 in which the connection port 6 is arranged.

[0022] The tank cover 5 contains a recycled plastic material or a resin material mixed with a recycled plastic material. The tank cover 5 of the present embodiment is configured using a PCR material obtained by recycling a PE material or a PP material or the like. However, it is not limited to this, and other resin materials may be used, or a plurality of materials may be used. That is, as the recycled plastic material, a PP material, a PE material, or a mixture of multiple types can be used. As the physical property values of the PCR material used for the tank cover 5 of the present embodiment, in the case of a PE material, the Charpy impact value is 4 kJ / m2 Above and 9 kJ / m 2 or less. Also, the MFR value is about 8 g / 10 min or more and 13 g / 10 min or less, and the flexural modulus is about 700 MPa or more and 1200 MPa or less. The Charpy impact value of the virgin material is 3 kJ / m 2 or more and 4 kJ / m 2 or less. Generally, although the Charpy impact value of the PCR material may be lower than that of the virgin material, it is preferable that the Charpy impact value of the PCR material is higher than that of the virgin material as in this embodiment. Also, in the PP material, the Charpy impact value is 5 kJ / m 2 or more, the MFR value is about 35 g / 10 min or more and 40 g / 10 min or less, and the flexural modulus is 1000 MPa or more.

[0023] Incidentally, the physical properties of the PCR material can vary depending on the physical properties of the resource and other coloring materials or additives. Therefore, the Charpy impact value of the PCR material used in this embodiment is higher than that of the virgin material. Incidentally, it is preferable that the Charpy impact value of the PCR material is higher than that of the virgin material, but it is not necessarily required to be higher than that of the virgin material.

[0024] FIG. 5 is a cross-sectional view of the tank cover 5 and shows the V cross-section in FIG. 3. The V cross-section is a cross-section that crosses (orthogonally) the opening 9 in which the connection port 6 is arranged in the tank cover 5. As shown from FIG. 3 to FIG. 5, the tank cover 5 includes a first end side 7 and a second end side 8 located on the side of the tank exterior 4 opposite to the first end side 7. As shown in FIG. 5, similarly in the V cross-section, the side surface width A of the first end side 7 and the side surface width B of the second end side 8 are included.

[0025] In FIG. 5, the dimension of the side width A of the first end side 7 is about 6.0 mm. On the other hand, the dimension of the side width B of the second end side 8 is about 1.2 mm. As described above, the protruding portion (the portion where the opening is formed) of the first end side 7 of the tank cover 5 has a risk of chipping or cracking due to dropping. Therefore, in the tank cover 5 of the present embodiment, the ratio of the dimension of the side width A of the first end side 7 (end side) to the dimension of the side width B of the second end side 8 (opposite end side), which is the basic wall thickness, is 5 = A / B is set as. By increasing the width of the dimension A from the basic wall thickness, it is possible to suppress chipping or cracking due to dropping. The basic wall thickness is the wall thickness of the portion that occupies most of the molded part. In the tank cover 5 of the present embodiment, as shown in FIGS. 3 to 5, the ratio occupied by the second end side 8 is larger than the ratio occupied by the first end side 7. Therefore, the width B dimension of the second end side 8 (opposite end side) becomes the basic wall thickness. Here, the energy required for chipping and cracking due to impact is proportional to the width and thickness of the molded product. That is, in order to suppress chipping or cracking, it is conceivable to increase the width or thickness. On the other hand, if the thickness of the molded product is simply increased, there is a risk of molding sink marks. In the present embodiment, while setting the basic wall thickness to a predetermined thickness so that molding sink marks do not occur, the thickness of the first end side 7 is increased from the basic wall thickness. In this way, by increasing the width of the dimension A from the basic wall thickness, it is possible to suppress chipping or cracking due to dropping.

[0026] Note that an opening 9 for arranging the connection port 6 is provided on the first end side 7. And, as shown in FIG. 3, the side width of the first end side 7 has widths of different sizes in addition to the side width obtained in the V cross-section shown in FIG. 3. In the present embodiment, for at least one side width of the first end side 7, by setting the ratio of the dimension of the side width A of the first end side 7 to the dimension of the side width B of the second end side 8, which is the basic wall thickness, to 5 = A / B, it is possible to suppress chipping or cracking due to dropping.

[0027] Also, regarding the dimension of the side width A of the first end side 7, there may be a cutout on its back surface from the perspective of reducing the plastic member. Here, in the completed shape of the ink tank 1 in FIG. 2, the surface that can be seen from the outside is defined as the front surface, and the surface that cannot be seen from the outside is defined as the back surface. There may also be a cutout at the arrow portion indicated by A in FIG. 5.

[0028] In addition, in the tank cover 5 of the present embodiment, although the opening 9 is provided on the first end side 7, the opening 9 does not necessarily have to be provided. In the completed form of the ink tank 1 with the tank cover 5 attached to the tank exterior 4, by increasing the width dimension of the first end side 7 more than the basic wall thickness of the tank cover 5 as described above, it is possible to suppress chipping or cracking of the tank cover 5 due to dropping.

[0029] Incidentally, the above-described dimensions A and B define the relationship (A / B) between the side width of the first end side 7 and the side width of the second end side 8 in the same cross-section (V cross-section) corresponding to the plane intersecting (orthogonal to) the opening of the first end side 7.

[0030] In the present embodiment, by the A / B ratio, it is possible to significantly increase the impact strength of the tank cover 5. Incidentally, it has been found that if the physical property values of the PCR material PE are about the following values, chipping or cracking due to dropping impact can be suppressed. That is, the Charpy impact value is 4 kJ / m 2 or more, the MFR value is about 1 g / 10 min or more and 15 g / 10 min or less, and the flexural modulus is about 500 MPa or more and 1500 MPa or less. The physical property values of the PCR material PP are such that the Charpy impact value is 3 kJ / m 2 or more, the MFR value is about 30 g / 10 min or more and 50 g / 10 min or less, and if the flexural modulus is 800 MPa or more, it has been found that chipping or cracking due to dropping impact can be suppressed.

[0031] As described above, according to this embodiment, even when a recycled plastic material is used for the liquid storage container, it is possible to maintain a high impact strength. Therefore, for example, even if the liquid storage container is accidentally dropped, it is possible to suppress chipping or cracking.

[0032] <<Second Embodiment>> In the second embodiment, an ink tank of a type different from that of the first embodiment will be described. The ink tank, which is the liquid storage container described in this embodiment, also uses a recycled plastic material.

[0033] FIG. 6 is a perspective view of the ink tank 10 in this embodiment. The ink tank 10, which is a liquid storage container, stores ink of a pigment ink of a color (e.g., black, cyan, magenta, and yellow, etc.) that matches the configuration on the recording device side as the liquid. The ink tank 10 has a tank exterior 40 and a tank cover 50. The tank exterior 40 functions as an ink storage portion as it is. In this embodiment, the ink storage capacity of the ink tank 10 is about 700 ml. Also, by commonly using the tank cover 50 and making the tank exterior into a small capacity of about 300 ml, it is possible to make a small-capacity ink tank 10.

[0034] The tank cover 50 has a connection port 60 with the inkjet recording device 100. The tank cover 50 serves to protect functional parts such as the connection port 60 from external impacts. In the tank cover 50, the side (the side indicated by the broken line, the +Z direction side) where the connection port 60 with the inkjet recording device 100 is arranged is referred to as the first end side 70 (end side) of the tank cover 50. On the other hand, the side of the tank cover 50 on the tank exterior 40 side (the side opposite to the first end side 70, the -Z direction side) is also referred to as the second end side 80 (opposite end side). In the state where the ink tank 10 is mounted, the first end side 70 (end side) of the tank cover 50 is a protruding portion compared to other locations. Therefore, if the first end side 70 is directly impacted due to the user accidentally dropping it, etc., there is a possibility that it will develop into chipping or cracking of the protruding portion.

[0035] Figures 7 and 8 are perspective views of the tank cover 50. Figure 7 is a perspective view seen from the end side (i.e., the first end side 70) of the entire ink tank 10. Figure 8 is a perspective view seen from the side of the tank exterior 40 (i.e., the second end side 80). The tank cover 50 contains a recycled plastic material or a resin material mixed with a recycled plastic material. The tank cover 5 of this embodiment is configured using a PCR material that reuses materials such as PE material or PP material. The tank cover 50 has an opening 90 where the connection port 60 is arranged.

[0036] Figure 9 is a cross-sectional view of the tank cover 50 and shows the IX cross-section in Figure 7. The IX cross-section is a cross-section that traverses the opening 90 where the connection port 60 is arranged in the tank cover 50. Also, the IX cross-section is a plane that intersects (is orthogonal to) the opening on the first end side 70. In Figure 9, the dimension of the side width A of the side surface of the first end side 70 (end side) of the tank cover 50 is about 4.3 mm. On the other hand, the dimension of the side width B of the second end side 80 (opposite end side) is about 2.0 mm. As described above, the protruding part on the first end side 70 of the tank cover 50 has a concern of chipping or cracking due to dropping. Therefore, in this embodiment, the ratio of the dimension of the side width A of the first end side 70 (end side) to the dimension of the side width B of the second end side 80 (opposite end side), which is the basic wall thickness, is 2.15 = A / B is set. By increasing the width of the dimension A more than the dimension B, which is the basic wall thickness, chipping or cracking due to dropping can be suppressed. Regarding the dimension of the side width A of the first end side 70 (end side), from the perspective of reducing plastic members, there may be a cutout on the back surface of the width of the first end side 70.

[0037] In this embodiment, the impact strength of the tank cover 50 can be significantly increased by the A / B ratio. Also, it has been found that chipping or cracking due to dropping impact can be suppressed if the physical property values of the PCR material PE are about the following values. That is, the Charpy impact value is 4 kJ / m 2 or more, the MFR value is 1 g / 10 min or more and 15 g / 10 min or less, and the flexural modulus is 500 MPa or more and 1500 MPa or less. The physical property values of the PCR material PP are that the Charpy impact value is 3 kJ / m2 As described above, it has been found that if the MFR value is about 30 g / 10 min or more and 50 g / 10 min or less, and the flexural modulus is 800 MPa or more, chipping or cracking due to a drop impact can be suppressed.

[0038] As described above, also in this embodiment, even when a recycled plastic material is used for the liquid storage container, it is possible to maintain a high impact strength. Therefore, for example, even if the liquid storage container is accidentally dropped, chipping or cracking can be suppressed.

[0039] <<Third Embodiment>> In the third embodiment, an ink tank of a type different from that of the first embodiment will be described. The ink tank, which is a liquid storage container described in this embodiment, also uses a recycled plastic material.

[0040] FIG. 10 is a perspective view of the ink tank according to this embodiment. The ink tank 1000 has a tank exterior 400 and a tank cover 500. The tank cover 500 contains a recycled plastic material or a resin material mixed with a recycled plastic material. The tank cover 5 of this embodiment is configured using a PCR material obtained by recycling a PE material, a PP material, or the like. The tank exterior 400 functions as an ink storage portion as it is. In this embodiment, the ink storage capacity is about 700 ml. The tank cover 500 serves to protect functional parts such as a connection port 600 to the inkjet recording apparatus 100 provided on the long side of the tank exterior 400 from external impacts. In particular, the first end side 700 (end side) of the tank cover 500 indicated by the dashed line is a protruding portion compared to the others. Therefore, if the user accidentally drops it, the first end side 700 may be directly impacted. There is a possibility that it may develop into chipping or cracking at the protruding portion.

[0041] In this embodiment, the dimension A of the side width of the first end side (end side) of the tank cover 500 is about 5.0 mm. On the other hand, the dimension B of the side width (not shown) of the second end side (opposite end side) is about 1.0 mm. The protrusion of the first end side 700 of the tank cover 500 has a concern of chipping or cracking due to dropping. Therefore, in this embodiment, the ratio of the dimension A of the side width of the first end side (end side) to the dimension B of the side width of the second end side (opposite end side), which is the basic wall thickness, is 5.0 = A / B set as such. By increasing the width of the dimension A from the basic wall thickness, chipping or cracking due to dropping can be suppressed. With such an A / B ratio, the impact strength of the tank cover 500 can be significantly increased.

[0042] <<Other Embodiments>> In the above-described embodiment, an example was described in which the width dimension of the first end side (end side), where the tank cover is mounted in the entire ink tank, is configured to be larger than the width dimension, which is the basic wall thickness of the second end side (opposite end side) of the tank cover. Note that if the ratio of the width dimension A of the end side to the width dimension B of the opposite end side is larger than a predetermined value, there is a possibility that the original function of the tank cover cannot be exhibited. For this reason, the ratio of the width dimension A of the first end side (end side) to the width dimension B of the second end side (opposite end side), which is the basic wall thickness, is A / B < 7 is preferably set as such. Also, as described in each of the above-described embodiments, since it is preferable to increase the ratio of the width dimension A of the first end side (end side) to the width dimension B of the second end side (opposite end side), which is the basic wall thickness, 1 < A / B < 7 is preferably satisfied.

[0043] Also, summarizing each of the above-described embodiments, the side width A of the tank cover located on the first end side is preferably 4.3 mm or more and 6.0 mm or less.

[0044] The disclosure of this embodiment includes configurations represented by the following liquid storage container examples.

[0045] <Configuration 1> A liquid storage container having a storage portion for storing a liquid, a supply portion for supplying the liquid stored in the storage portion to the outside, and a protective member for protecting the supply portion, wherein the protective member contains a recycled plastic material or a resin material mixed with a recycled plastic material, and in a state where the protective member is assembled to the supply portion, the relationship between the side width A of the protective member located on the first end side and the side width B of the protective member located on the storage portion side opposite to the first end side is 1 < A / B < 7 and has a portion satisfying the above, characterized in that it is a liquid storage container.

[0046] <Configuration 2> the protective member has an opening in which the supply portion is arranged on the first end side, in the same cross-section corresponding to the plane intersecting the opening, the relationship between the side width A and the side width B is 1 < A / B < 7 and has a portion satisfying the above, the liquid storage container according to Configuration 1.

[0047] <Configuration 3> the recycled plastic material is a polyethylene material, the liquid storage container according to Configuration 1 or 2.

[0048] <Configuration 4> the Charpy impact value of the recycled plastic material is 4 kJ / m 2 or more, the liquid storage container according to Configuration 3.

[0049] <Configuration 5> the MFR value of the recycled plastic material is 1 g / 10 min or more and 15 g / 10 min or less, the liquid storage container according to Configuration 3 or 4.

[0050] <Configuration 6> the flexural modulus of the recycled plastic material is from 500 MPa to 1500 MPa, the liquid storage container according to any one of Configurations 3 to 5.

[0051] <Constitution 7> The liquid storage container according to Configuration 1 or 2, wherein the recycled plastic material is a polypropylene material.

[0052] <Constitution 8> The Charpy impact value of the recycled plastic material is 3 kJ / m 2 or more. The liquid storage container according to Configuration 7.

[0053] <Constitution 9> The MFR value of the recycled plastic material is 30 g / 10 min or more and 50 g / 10 min or less. The liquid storage container according to Configuration 7 or 8.

[0054] <Constitution 10> The flexural modulus of the recycled plastic material is 800 MPa or more. The liquid storage container according to any one of Configurations 7 to 9.

[0055] <Constitution 11> The side width A of the protective member located on the first end side is 4.3 mm or more and 6.0 mm or less. The liquid storage container according to any one of Configurations 1 to 10.

[0056] <Constitution 12> The recycled plastic material is a post-consumer material. The liquid storage container according to any one of Configurations 1 to 11.

[0057] <Constitution 13> The recycled plastic material is a pre-consumer material. The liquid storage container according to any one of Claims 1 to 11.

Explanation of Reference Numerals

[0058] 1 Ink Tank 4 Tank Exterior 5 Tank Cover 6 Connection Port 7 First End Side 8 Second End Side

Claims

1. A liquid storage container having a storage portion for storing a liquid, a supply portion for supplying the liquid stored in the storage portion to the outside, and a protective member for protecting the supply portion, wherein the protective member, contains a recycled plastic material or a resin material mixed with a recycled plastic material, and in a state where the protective member is assembled to the supply portion, the relationship between the side width A of the protective member located on the first end side and the side width B of the protective member located on the storage portion side opposite to the first end side is, 1 < A / B < 7 and has a portion satisfying the above, characterized in that it is a liquid storage container.

2. The protective member has an opening in which the supply portion is arranged on the first end side, and in the same cross-section corresponding to the plane intersecting the opening, the relationship between the side width A and the side width B is, 1 < A / B < 7 and has a portion satisfying the above, the liquid storage container according to claim 1.

3. The recycled plastic material is a polyethylene material, the liquid storage container according to claim 1 or 2.

4. The Charpy impact value of the recycled plastic material is 4 kJ / m ２ or more, the liquid storage container according to claim 3.

5. The MFR value of the recycled plastic material is 1 g / 10 min or more and 15 g / 10 min or less, the liquid storage container according to claim 3.

6. The flexural modulus of the recycled plastic material is from 500 MPa to 1500 MPa, the liquid storage container according to claim 3.

7. The recycled plastic material is a polypropylene material, the liquid storage container according to claim 1 or 2.

8. The Charpy impact value of the recycled plastic material is 3 kJ / m ２ or more, and the liquid storage container according to claim 7.

9. The MFR value of the recycled plastic material is 30 g / 10 min or more and 50 g / 10 min or less, and the liquid storage container according to claim 7.

10. The flexural modulus of the recycled plastic material is 800 MPa or more, and the liquid storage container according to claim 7.

11. The side width A of the protective member located on the first end side is 4.3 mm or more and 6.0 mm or less, and the liquid storage container according to claim 1 or 2.

12. The recycled plastic material is a post-consumer material, and the liquid storage container according to claim 1 or 2.

13. The recycled plastic material is a pre-consumer material, and the liquid storage container according to claim 1 or 2.

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