JP2012020763A - Container for liquid composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container for liquid composition by which liquid composition is stably discharged.SOLUTION: The container 100 used for discharging the liquid composition 160, includes: an inner bag 120; a cylinder 110; a piston 140; and a nozzle 130. The inner bag 120 includes a flexible part 121 composed of a flexible material, and the liquid composition 160 is filled in the inner bag 120. The inner bag 120 is accommodated in the cylinder 110, and the cylinder 110 is composed of a harder material than the flexible part 121. The piston 140 is movably attached to an inner section of the cylinder 110, and the piston 140 pushes out the liquid composition 160 to outside of the container 100. The nozzle 130 discharges the liquid composition 160 pushed out by the piston 140, to outside of the container 100.

Description

  The present invention relates to a container for a liquid composition used when storing and applying a liquid composition.

  In the assembly process of a semiconductor package, when bonding a semiconductor element or a heat dissipation member to a support such as a lead frame or an organic substrate, a liquid composition that is a liquid adhesive at room temperature is widely used. As this liquid composition, a material in which an inorganic filler having a high specific gravity is dispersed in a resin binder having a low viscosity at room temperature is often used.

  This liquid composition is normally used by being filled in a liquid composition container having a resin cylinder. The liquid composition container filled with the liquid composition discharges a certain amount of the liquid composition by mechanical force or air pressure, and applies the liquid composition to the support.

  In order to improve workability when the liquid composition is applied to the support, the liquid composition preferably has a low viscosity. The liquid composition is solidified by heating or the like, but when a curable resin is used as the resin binder, it is preferable that the reactivity of the curable resin is excellent in order to shorten the curing time. However, a liquid composition having a low viscosity tends to cause sedimentation of the inorganic filler during storage. In addition, a liquid composition having excellent reactivity may cause a reaction to proceed during storage.

  Therefore, a low-viscosity liquid composition having good workability and curability is stored at a low temperature such as −15 ° C. or −40 ° C. in order to suppress sedimentation of the inorganic filler, suppression of reaction, and long-term storage. . The liquid composition cooled to a low temperature is in a highly viscous state. When a liquid composition stored at a low temperature is used, the liquid composition is generally used after being returned to room temperature so as to have a low viscosity.

  By the way, since the thermal expansion coefficient of the liquid composition and the thermal expansion coefficient of the cylinder are different, the liquid composition contracts more than the cylinder when the liquid composition container containing the liquid composition is cooled and stored. For this reason, a gap is easily generated between the liquid composition and the cylinder. Further, when the temperature of the liquid composition container containing the cooled liquid composition is returned to room temperature, the temperature rises from the outside, so that the cylinder expands before the liquid composition, and the space between the liquid composition and the cylinder is increased. There is a tendency for gaps to occur. Due to the gap generated between the liquid composition and the cylinder, bubbles are generated in the liquid composition when the liquid composition container containing the liquid composition is returned to room temperature. The bubbles cause a pressure loss or cause an empty shot in which only the air is discharged without discharging the liquid composition, thereby deteriorating the discharge stability of the liquid composition container.

  To deal with such a problem, for example, Patent Document 1 discloses a cylinder that contains a paste-like composition, a nozzle cap that is detachably attached to a nozzle portion formed on the cylinder, and a head that is detachably attached to the cylinder. A dispenser syringe barrel having a cap and a piston for pumping a paste-like composition movably disposed inside the cylinder, the head cap having a vent for eliminating the difference in pressure between the inside and outside of the cylinder Proposed.

JP 2004-174348 A

  In the syringe for a dispenser described in Patent Document 1, the head cap eliminates the pressure difference between the inside and the outside of the cylinder, and air enters the cylinder from a slight gap between the nozzle portion of the cylinder and the nozzle cap. Alternatively, gas intrusion can be suppressed. However, in this syringe for a dispenser, when the syringe for a dispenser containing the paste-like composition is stored in a cold state and when the temperature of the cooled syringe for the dispenser is returned to room temperature, the paste-like composition is contracted and expanded. Cylinder contraction and expansion do not follow. Therefore, this syringe barrel for dispenser cannot prevent the air existing between the cylinder and the piston before being stored cold from entering between the paste-like composition and the cylinder. As a result, a gap is generated between the paste-like composition and the cylinder, so that generation of bubbles in the paste-like composition cannot be suppressed.

  The object of the present invention is to suppress the generation of bubbles in the liquid composition, and to reduce the occurrence of pressure loss and emptying due to bubbles, so that the liquid composition can be stably discharged. It is to provide a container for a liquid composition.

(1)
A container for a liquid composition according to one aspect of the present invention discharges a liquid composition and includes an inner bag, a cylinder, a piston, and a nozzle. The inner bag has a flexible portion made of a flexible material. The inner bag is filled with a liquid composition. The cylinder stores the inner bag inside. Moreover, this cylinder consists of a material harder than a flexible part. The piston is movably attached to the inside of the cylinder. The piston pushes the liquid composition out of the liquid composition container. The nozzle discharges the liquid composition pushed out by the piston to the outside of the liquid composition container.

  The flexible part follows the shrinkage and expansion of the liquid composition when the liquid composition contained in the liquid composition container is cooled and stored, and when the temperature of the liquid composition contained in the cooled liquid composition container is returned to room temperature. Therefore, a gap is not easily generated between the liquid composition and the inner bag. For this reason, generation | occurrence | production of the bubble in a liquid composition can be suppressed. Therefore, it is possible to reduce the pressure loss due to the bubbles and the occurrence of idle shots. Therefore, the liquid composition container can stably discharge the liquid composition.

(2)
In the liquid composition container of the above (1), the nozzle is attached to the inner bag. In this liquid composition container, the liquid composition is directly fed from the inner bag. At least one of the nozzle and the inner bag is detachably attached to the cylinder.

  The liquid composition is sent directly from the inner bag. For this reason, in this liquid composition container, since the liquid composition does not adhere to the cylinder, the cylinder can be reused. Therefore, the user can reduce the use cost of the liquid composition container.

(3)
In the liquid composition container according to the above (1) or (2), the piston is provided in the inner bag.

  The piston is provided in the inner bag. For this reason, in this liquid composition container, the piston can be attached to the cylinder at the same time as the inner bag is attached to the cylinder. Therefore, the trouble of installing the piston in the cylinder can be saved.

(4)
In the liquid composition container according to the above (1) to (3), the inner bag has a fold.

  The inner bag has a fold. For this reason, in this liquid composition container, when the liquid composition in the inner bag is pushed out by the piston, the inner bag is folded along the fold, so that the liquid composition is easily pushed out from the inner bag. For this reason, the quantity which a liquid composition remains in an inner bag can be reduced.

(5)
A container for a liquid composition according to one aspect of the present invention discharges a liquid composition, and includes a cylinder, a frame, a piston, and a nozzle. The cylinder has a flexible portion made of a flexible material. This cylinder is filled with a liquid composition. The frame is made of a material harder than the flexible part. This frame covers the flexible part. The piston is movably attached to the inside of the cylinder. The piston pushes the liquid composition out of the liquid composition container. The nozzle discharges the liquid composition to the outside of the liquid composition container.

  When the liquid composition contained in the liquid composition container from which the frame has been removed is cooled and stored, and when the temperature of the liquid composition contained in the cooled liquid composition container is returned to room temperature, the liquid composition shrinks and expands. Following this, the flexible portion contracts and expands, so that a gap is hardly generated between the liquid composition and the cylinder. Thereby, generation | occurrence | production of the bubble in a liquid composition can be suppressed. As a result, it is possible to reduce the pressure loss due to bubbles and the occurrence of idling.

  By extruding the piston along the cylinder whose flexible part is covered with the frame, the liquid composition in the cylinder can be stably discharged to the outside of the liquid composition container.

(6)
In the liquid composition container of the above (5), the flexible portion is formed in a portion excluding the vicinity of both ends of the cylinder.

  By forming the flexible portion in a portion excluding the vicinity of both ends of the cylinder, it is possible to widely form a flexible portion that contracts and expands following the contraction and expansion of the liquid composition. For this reason, a gap is less likely to occur between the liquid composition and the cylinder. Therefore, generation | occurrence | production of the bubble in a liquid composition can be suppressed more.

(7)
In the liquid composition container of the above (5) or (6), the cylinder is provided with a positioning portion for determining the installation position of the frame.

  Since the frame body is installed on the cylinder by the positioning portion, the frame body can reliably cover the flexible portion. Therefore, the frame can maintain the shape of the flexible portion, and can realize a smooth movement of the piston.

  According to the container for a liquid composition according to the present invention, it is possible to suppress the generation of bubbles in the liquid composition, and it is possible to stabilize the liquid composition by reducing the pressure loss due to bubbles and the occurrence of empty shots. Can be discharged.

It is a side view for demonstrating the use condition of the container for liquid compositions which concerns on 1st Embodiment of this invention. It is a sectional side view for demonstrating the use condition of the container for liquid compositions shown in FIG. It is a side view for demonstrating the storage state of the container for liquid compositions which concerns on 1st Embodiment of this invention. It is a sectional side view for demonstrating the storage state of the container for liquid compositions shown in FIG. It is a sectional side view which shows the container for liquid compositions in the state by which the piston was pushed in. It is a sectional side view for demonstrating the storage state of the container for liquid compositions which concerns on the modification of 1st Embodiment of this invention. It is a side view for demonstrating the use condition of the container for liquid compositions which concerns on 2nd Embodiment of this invention. It is a sectional side view for demonstrating the use condition of the container for liquid compositions shown in FIG. It is the sectional view on the AA line of FIG. It is a side view for demonstrating the storage state of the container for liquid compositions which concerns on 2nd Embodiment of this invention. It is a sectional side view for demonstrating the storage state of the container for liquid compositions shown in FIG.

(First embodiment)
As shown in FIGS. 1 and 2, the liquid composition container (hereinafter simply referred to as “container”) 100 according to the first embodiment mainly includes a cylinder 110, an inner bag 120, a nozzle 130, And the piston 140. The usage state of the container 100 refers to a state when the liquid composition 160 is applied to an object.
Moreover, the container 100a which made the container 100 in use the storage state is mainly comprised from the inner bag 120 and the nozzle cap 150, as FIG. In addition, the storage state of the container 100a refers to a state when the liquid composition 160 is stored. For the container 100a, the description of the configuration common to the container 100 is omitted as appropriate.

<Cylinder>
As shown in FIGS. 1 and 2, the cylinder 110 is formed in a cylindrical shape and includes a flange portion 111 and a first convex groove 112. As the material of the cylinder 110, a material that is harder than the flexible portion 121 of the inner bag 120 described later and has a hardness that can guide the movement of the piston 140 when the liquid composition 160 is applied is used. Specifically, a synthetic resin such as polyethylene, polypropylene, polyethylene terephthalate, or polytetrafluoroethylene is used as the material of the cylinder 110.

  The flange portion 111 is formed to project outward from the outer peripheral edge of the upper end portion of the cylinder 110. A dispenser (not shown) that pushes the piston 140 downward (in the direction of the white arrow in FIG. 2) is attached to the flange portion 111.

  The first convex groove 112 is formed in a spiral shape on the inner peripheral surface near the lower end of the cylinder 110. The first convex groove 112 is a groove having a convex cross section (see FIG. 2), and is screwed into a first concave groove 126 of the inner bag 120 described later.

<Inner bag>
As shown in FIGS. 2 and 3, the inner bag 120 includes a flexible portion 121 and a nozzle mounting portion 122. The flexible part 121 is formed in a bag shape, and the nozzle mounting part 122 is formed in a cylindrical shape.

  The flexible part 121 has an opening part 123, a recessed part 124, and a plurality of fold lines 125. The flexible portion 121 is attached to the nozzle attachment portion 122 by connecting the opening portion 123 and the upper end portion of the nozzle attachment portion 122 together. The recessed portion 124 has a shape that is recessed along the shape of the lower end portion of the piston 140 that is in contact with the flexible portion 121. The piston 140 can be brought into close contact with the flexible portion 121 by the depression 124. As a result, a gap is not easily generated between the piston 140 and the inner bag 120.

  When the liquid composition 160 is stored refrigerated and when the cooled liquid composition 160 is returned to room temperature, the liquid composition 160 contracts and expands. The material of the flexible part 121 may be any flexible material that can contract and expand following the contraction and expansion of the liquid composition 160. For example, polyethylene, polypropylene, polyethylene terephthalate, polytetraflur Examples include synthetic resins such as olethylene.

  The nozzle mounting portion 122 includes a first concave groove 126, an inner cylinder 127, and an outer cylinder 128. The first concave groove 126 is formed in a spiral shape on the outer peripheral surface near the upper end of the nozzle mounting portion 122. The first concave groove 126 is a groove having a concave cross section (see FIG. 2), and is screwed into the first convex groove 112. The nozzle mounting portion 122 is fixed to the cylinder 110 by the nozzle mounting portion 122 being screwed into the cylinder 110 while the first concave groove 126 slides along the first convex groove 112. Thereby, the inner bag 120 is attached to the cylinder 110.

  The inner cylinder 127 is formed in a cylindrical shape, and is disposed at the lower end of the nozzle mounting portion 122. The liquid composition 160 pushed out from the flexible part 121 passes through the inside of the inner cylinder 127 and is fed into the nozzle 130.

  The outer cylinder 128 is formed in a cylindrical shape having a larger diameter than the inner cylinder 127 and is disposed so as to cover a part of the inner cylinder 127. A gap is provided between the outer cylinder 128 and the inner cylinder 127. A second convex groove 129 formed in a spiral shape is provided on the inner peripheral surface of the outer cylinder 128. The second convex groove 129 is a groove having a convex cross section (see FIG. 2), and is screwed into a second concave groove 131 of the nozzle 130 described later.

<Nozzle>
As shown in FIG. 2, the nozzle 130 includes a second concave groove 131 and a discharge unit 132. The second concave groove 131 is formed in a spiral shape on the outer peripheral surface near the upper end of the nozzle 130. The second groove 131 is a groove having a concave cross section, and is screwed into the second groove 129. The nozzle 130 is screwed into the nozzle mounting portion 122 while the second concave groove 131 slides along the second convex groove 129, so that the nozzle 130 is fixed to the nozzle mounting portion 122. In this way, the nozzle 130 is attached to the inner bag 120.

  The discharge part 132 is formed in a cylindrical shape and is arranged at the lower end of the nozzle 130. The liquid composition 160 pushed out from the inner bag 120 by the piston 140 passes through the inside of the discharge part 132 and is discharged to the outside of the container 100.

<Piston>
The piston 140 is attached so as to be movable in the vertical direction inside the cylinder 110. The piston 140 is formed in a columnar shape that is in close contact with the inner peripheral surface of the cylinder 110 when attached to the cylinder 110.

<Nozzle cap>
As shown in FIGS. 3 and 4, the nozzle cap 150 is formed in a shape that covers the inner cylinder 127. On the outer peripheral surface in the vicinity of the upper end of the nozzle cap 150, a second concave groove 151 formed in a spiral shape is provided. The second concave groove 151 is a groove having a concave cross section (see FIG. 4), and is screwed into the second convex groove 129. The nozzle cap 150 is fixed to the nozzle mounting portion 122 by the nozzle cap 150 being screwed into the nozzle mounting portion 122 while the second concave groove 151 slides along the second convex groove 129. Thereby, the nozzle cap 150 is attached to the inner bag 120 and closes the inner cylinder 127.

<Liquid composition>
The liquid composition 160 is, for example, for bonding a semiconductor element, a heat radiating member, or the like to a support such as a lead frame or an organic substrate, and includes, for example, an adhesive that is liquid at room temperature. This adhesive is obtained by dispersing an inorganic filler having a high specific gravity in a low-viscosity resin binder at room temperature.

<Container for liquid composition in use>
The user obtains the container 100 in use by attaching the cylinder 110, the nozzle 130, and the piston 140 to the inner bag 120 filled with the liquid composition 160 (see FIGS. 1 and 2).

  Next, the user attaches a dispenser (not shown) to the container 100 in use. The piston 140 is pushed downward (in the direction of the white arrow in FIG. 2) along the cylinder 110 by mechanical force or air pressure from the dispenser. As a result, the liquid composition 160 is pushed out by the piston 140. The liquid composition 160 pushed out by the piston 140 sequentially passes through each of the flexible portion 121, the nozzle mounting portion 122, and the nozzle 130 and is discharged to the outside of the container 100.

  As shown in FIG. 5, as the liquid composition 160 is pushed out from the flexible part 121 by the piston 140, the flexible part 121 is folded along the fold 125. Thereby, the liquid composition 160 is easily pushed out of the inner bag 120 by the piston 140.

<Container for liquid composition in storage>
The user removes the cylinder 110, the nozzle 130, and the piston 140 from the container 100 in use (see FIGS. 1 and 2). Next, the user attaches the nozzle cap 150 to the inner bag 120 to obtain the storage container 100a (see FIGS. 3 and 4). The liquid composition 160 contained in the container 100a in the storage state is cooled and stored. In addition, when a user returns the container 100a in a storage state to the container 100 in a use state, the liquid composition 160 is applied after the cooled liquid composition 160 is returned to room temperature.

<Effect in the first embodiment>
As described above, in the container 100 according to this embodiment, when the liquid composition 160 contained in the container 100 is stored in a cooled state, and when the temperature of the liquid composition 160 contained in the cooled container 100 is returned to room temperature. Since the flexible portion 121 follows the contraction and expansion of the liquid composition 160, a gap is hardly generated between the liquid composition 160 and the inner bag 120. For this reason, generation | occurrence | production of the bubble in the liquid composition 160 can be suppressed. Therefore, it is possible to reduce the pressure loss due to the bubbles and the occurrence of idle shots. Therefore, the container 100 can discharge the liquid composition 160 stably.

  In the present embodiment, the liquid composition 160 is sent directly from the inner bag 120 to the nozzle 130 without contacting the cylinder 110. For this reason, since the liquid composition 160 does not adhere to the cylinder 110, the cylinder 110 can be reused. For this reason, the user can reduce the usage cost of the container 100.

  In the present embodiment, when the liquid composition 160 of the inner bag 120 is pushed out by the piston 140, the inner bag 120 is folded along the fold 125, so that the liquid composition 160 is easily pushed out of the inner bag 120. For this reason, the amount of the liquid composition 160 remaining in the inner bag 120 can be reduced.

<Modification of First Embodiment>
(A)
As shown in FIG. 6, in the container 100b, the piston 140 may be connected to the flexible part 121b whose upper surface is open. In the container 100 b, the piston 140 can be attached to the cylinder 110 at the same time that the inner bag 120 is attached to the cylinder 110. For this reason, the effort which attaches piston 140 to the cylinder 110 can be saved. In addition, since the piston 140 is connected to the flexible portion 121b and the piston 140 and the liquid composition 160 are in direct contact with each other, a gap is hardly generated between the piston 140 and the liquid composition 160. Other reference numerals are the same as those shown in the previous embodiment.

(B)
Instead of the structure in which the inner bag 120 is detachably attached to the cylinder 110, the nozzle 130 attached to the inner bag 120 may be detachably attached to the cylinder 110.

(Second Embodiment)
The container 100c which concerns on 2nd Embodiment is comprised from the cylinder 110c, the frame 170, the nozzle 130, and the piston 140 mainly in a use state, as FIG. 7-9 shows. The usage state of the container 100c refers to a state when the liquid composition 160 is applied to an object.
Further, the container 100d in which the container 100 in use is stored is mainly composed of a cylinder 110c, a piston 140, a nozzle cap 150, and a head cap 180, as shown in FIGS. In addition, the storage state of the container 100d refers to a state when the liquid composition 160 is stored. For the container 100d, the description of the configuration common to the container 100c is omitted as appropriate. Moreover, about the structure same as the said 1st Embodiment, the code | symbol same as 1st Embodiment is attached | subjected and the description is abbreviate | omitted suitably.

<Cylinder>
As shown in FIGS. 7 and 8, the cylinder 110c is formed in a cylindrical shape and includes a flange portion 111c, a nozzle mounting portion 113c, and a flexible portion 114c.

  The flange portion 111c is formed to project outward from the outer peripheral edge of the upper end portion of the cylinder 110c. A dispenser (not shown) that pushes the piston 140 downward (in the direction of the white arrow in FIG. 2) is attached to the flange portion 111c. The flange portion 111c has a first positioning portion 115c formed along the outer peripheral surface near the lower end. The first positioning portion 115c is a groove having a concave cross section (see FIG. 8), and is fitted to a first protrusion 174 of the frame 170 described later.

  The nozzle mounting portion 113c is provided below the flange portion 111c, and includes an inner cylinder 116c, an outer cylinder 117c, and a second positioning portion 118c.

  The inner cylinder 116c is formed in a cylindrical shape, and is disposed at the lower end of the nozzle mounting portion 113c. The liquid composition 160 pushed out from the flexible portion 114 c passes through the inner cylinder 116 c and is fed into the nozzle 130.

  The outer cylinder 117c is formed in a cylindrical shape having a larger diameter than the inner cylinder 116c, and is arranged so as to cover a part of the inner cylinder 116c. A gap is provided between the outer cylinder 117c and the inner cylinder 116c. A second convex groove 119c formed in a spiral shape is provided on the inner peripheral surface of the outer cylinder 117c. The second convex groove 119 c is a groove having a convex cross section (see FIG. 8), and is screwed into the second concave groove 131 of the nozzle 130. The nozzle 130 is screwed into the nozzle mounting portion 113c while the second concave groove 131 slides along the second convex groove 119c, so that the nozzle 130 is fixed to the nozzle mounting portion 113c. Thereby, the nozzle 130 is attached to the cylinder 110c.

  The material of the flange portion 111c, the nozzle mounting portion 113c, and the frame 170 is a material that is harder than the flexible portion 114c and has a hardness that can guide the movement of the piston 140 when the liquid composition 160 is applied. Is used. Specifically, as the material of the flange portion 111c, the nozzle mounting portion 113c, and the frame body 170, for example, synthetic resin such as polyethylene, polypropylene, polyethylene terephthalate, polytetrafluoroethylene, or the like is used.

  The flexible part 114c connects the flange part 111c and the nozzle attachment part 113c, and is provided so as to be integrated with the flange part 111c and the nozzle attachment part 113c. The material of the flexible part 114c may be any flexible material that can contract and expand following the contraction and expansion of the liquid composition 160, such as polyethylene, polypropylene, polyethylene terephthalate, and polytetraflur. Examples include synthetic resins such as olethylene.

<Frame body>
As shown in FIGS. 8 and 9, the frame 170 includes a semi-cylindrical first cover 171 and a semi-cylindrical second cover 172. The frame 170 covers the entire outer peripheral surface of the flexible portion 114c, a part of the outer peripheral surface of the flange portion 111c, and a part of the outer peripheral surface of the nozzle mounting portion 113c.

  The first cover 171 includes a pair of mounting claws 173, a first protrusion 174, and a second protrusion 175 (FIGS. 8 and 9). The pair of attachment claws 173 are detachably attached to a pair of engaging portions 176 of the second cover 172 described later.

  Each of the first protrusion 174 and the second protrusion 175 is a groove having a convex cross section (see FIG. 8). When the frame 170 is attached to the cylinder 110c, the first protrusion 174 is fitted with the first positioning part 115c, and the second protrusion 175 is fitted with the second positioning part 118c.

  The second cover 172 has a pair of engaging portions 176, a first protrusion 174, and a second protrusion 175. The pair of engaging portions 176 are formed in a recessed shape with which the attachment claws 173 can engage. Since the pair of attachment claws 173 are detachably attached to the pair of engaging portions 176, the first cover 171 is detachably attached to the second cover 172. As a result, the frame 170 removed from the used cylinder 110c can be reused by being attached to another cylinder 110c.

<Head cap>
The head cap 180 is detachably attached to the flange portion 111c. The head cap 180 attached to the flange portion 111c closes the opening on the upper side of the cylinder 110c.

<Container for liquid composition in use>
The user attaches the frame 170 and the nozzle 130 to the cylinder 110c that is not filled with the liquid composition 160. Next, the user fills the cylinder 110c with the liquid composition 160. Further, the user obtains the container 100c in use by attaching the piston 140 to the cylinder 110c (see FIGS. 7 to 9). In addition, the liquid composition 160 may be filled in the container 100c before it is in use.

  Furthermore, the user attaches a dispenser (not shown) to the container 100c in use. The piston 140 is pushed downward (in the direction of the white arrow in FIG. 8) along the cylinder 110c covered with the frame 170 by mechanical force or air pressure from the dispenser. As a result, the liquid composition 160 is pushed out by the piston 140. The liquid composition 160 pushed out by the piston 140 sequentially passes through each of the flexible portion 114c, the nozzle mounting portion 113c, and the nozzle 130 and is discharged to the outside of the container 100c.

<Container for liquid composition in storage>
The user removes the frame 170 and the nozzle 130 from the container 100c in use (see FIGS. 7 to 9). Next, the user obtains the container 100d in a storage state by attaching the nozzle cap 150 and the head cap 180 to the cylinder 110 (see FIGS. 10 and 11). The liquid composition 160 contained in the container 100d in the storage state is cooled and stored. When the user returns the container 100d in the storage state to the container 100c in the use state, the user returns the cooled liquid composition 160 to room temperature and then applies the liquid composition 160.

<Effect in 2nd Embodiment>
As described above, in the container 100c according to the present embodiment, when the liquid composition 160 contained in the container 100c is stored in a cooled state and when the temperature of the liquid composition 160 contained in the cooled container 100c is returned to room temperature, Since the flexible portion 114c contracts and expands following the contraction and expansion of the liquid composition 160, a gap is hardly generated between the liquid composition 160 and the cylinder 110c. Thereby, generation | occurrence | production of the bubble in the liquid composition 160 can be suppressed. As a result, it is possible to reduce the pressure loss due to bubbles and the occurrence of idling.

  By extruding the piston 140 along the cylinder 110c in which the flexible portion 114c is covered with the frame 170, the liquid composition 160 in the cylinder 110c can be stably discharged to the outside of the container 100c.

  In the present embodiment, the flexible portion 114c is formed in a portion excluding the vicinity of both ends of the cylinder 110c, so that the flexible portion 114c that contracts and expands following the contraction and expansion of the liquid composition 160 is widely formed. Can do. Thereby, a gap is less likely to occur between the liquid composition 160 and the cylinder 110c. As a result, the generation of bubbles in the liquid composition 160 can be further suppressed.

  Moreover, in this embodiment, since the frame 170 is installed in the cylinder 110c by the 1st positioning part 115c and the 2nd positioning part 118c, the frame 170 can cover the flexible part 114c reliably. Therefore, the frame 170 can hold | maintain the shape of the flexible part 114c in a cylindrical shape, and can implement | achieve the smooth motion of the piston 140. FIG.

100, 100a, 100b, 100c, 100d Container (liquid composition container)
110, 110c Cylinder 114c Flexible part 115c First positioning part (positioning part)
118c 2nd positioning part (positioning part)
120 inner bag 121, 121b flexible part 125 crease 130 nozzle 140 piston 160 liquid composition 170 frame

Claims (7)

A liquid composition container for discharging a liquid composition,
An inner bag that has a flexible portion made of a flexible material and is filled with the liquid composition;
A cylinder made of a material harder than the flexible part, storing the inner bag inside,
A piston which is movably attached to the inside of the cylinder and pushes the liquid composition out of the liquid composition container;
A liquid composition container comprising: a nozzle that discharges the liquid composition extruded by the piston to the outside of the liquid composition container. The nozzle is attached to the inner bag;
The liquid composition container according to claim 1, wherein at least one of the nozzle and the inner bag is detachably attached to the cylinder.   The liquid composition container according to claim 1 or 2, wherein the piston is provided in the inner bag.   The container for a liquid composition according to any one of claims 1 to 3, wherein the inner bag is formed with a fold. A liquid composition container for discharging a liquid composition,
A cylinder having a flexible portion made of a flexible material and filled with the liquid composition;
The frame is made of a material harder than the flexible part, and covers the flexible part,
A piston which is movably attached to the inside of the cylinder and pushes the liquid composition out of the liquid composition container;
A liquid composition container comprising: a nozzle that discharges the liquid composition to the outside of the liquid composition container.   The liquid composition container according to claim 5, wherein the flexible portion is formed in a portion excluding the vicinity of both ends of the cylinder.   The container for liquid composition according to claim 5 or 6, wherein the cylinder is provided with a positioning portion for determining an installation position of the frame.

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