Mixing container and mixing method for liquid substances

Abstract

There is a need for a mixing method that can quickly and uniformly mix two or more liquids immediately before use, without incorporating air bubbles. [Solution] A mixing method comprising a mixing container having two or more filling sections, each separately filled and sealed, and a mixing section equipped with a mixing promoting structure for mixing the two or more liquids, wherein the filling section and the mixing section are formed from a material including a flexible film, two or more liquids are filled into two or more of the filling sections, the filling sections filled with the liquids are sealed, and the two or more liquids are moved by pressing the filling sections, passing through the mixing section two or more times to mix the two or more liquids.

Description

[Technical Field]

[0001] This disclosure relates to a mixing container capable of mixing two or more liquids without incorporating air bubbles, and to a mixing method using the mixing container. [Background technology]

[0002] In fields such as semiconductors and precision equipment, liquid materials are widely used as coatings, sealants, and adhesives. These liquid materials are typically mixed immediately before use. To achieve their desired performance, the liquid must harden; therefore, the main component and hardener are mixed immediately before use. Since hardening occurs over time after mixing, applying a hardened liquid to the intended application will result in changes to its properties, such as viscosity, preventing it from performing optimally. Therefore, a mixing container is needed that allows for the rapid mixing of two or more liquid materials immediately before use, enabling the rapid use of the mixture.

[0003] A packaging bag has been proposed that has two storage compartments, each for separately holding different types of liquids, and that allows the seal between adjacent storage compartments to be opened by external pressure to mix the two types of liquids (see Patent Document 1).

[0004] A container has been proposed for mixing two liquids by fitting the mouths of two containers together with a connecting material, with the liquids contained in containers having flexible resin walls (see Patent Document 2).

[0005] A container has been proposed that allows for the mixing of two or more liquids by stacking containers for storing liquids and piercing the film between the containers (see Patent Document 3). [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Utility Model Publication No. 57-105272 [Patent Document 2] Japanese Patent Application Publication No. 10-194353 [Patent Document 3] Japanese Patent Publication No. 2015-67317 [Overview of the project] [Problems that the invention aims to solve]

[0007] In recent years, curable compositions such as adhesives, coatings, and encapsulants, which are mixed with two or more materials immediately before use, have become more high-performance and functional. Examples include semiconductor encapsulating resins, capillary underfills, and optical resins. Along with the improvement in performance and functionality, the curing reaction after mixing has also become faster.

[0008] Mixing relatively small quantities, such as a few milliliters to a few liters, using a mixing device results in wasted material adhering to the device, inability to achieve rapid curing, and the use of cleaning agents and energy consumption required for cleaning the device. Therefore, there is a need for a mixing container that can quickly mix relatively small quantities of curing material without the need for a mixing device, allowing for quick use.

[0009] Mixing containers are required to mix quickly and be ready for immediate use after mixing, but some products are extremely sensitive to the inclusion of air bubbles. Therefore, various methods are being considered to prevent air bubble inclusion and to degas the mixture in mixing equipment. Paints and adhesives containing fillers that tend to settle, such as metal paste, generally settle easily and have high thixotropy, so mixing is necessary immediately before application. On the other hand, if air bubbles are incorporated during mixing, they will form voids after curing, causing defects. Therefore, degassing equipment is used, but complete degassing is difficult. Mixtures of epoxy resin and hardener are also sensitive to the inclusion of air bubbles.

[0010] As mentioned above, mixing containers have been proposed that mix different liquids using individually packaged containers. However, there are no mixing containers that can quickly mix two or more liquids without incorporating air bubbles. This disclosure provides a mixing container and a mixing method that can store two or more liquids, quickly mix the two or more liquids immediately before use while preventing the incorporation of air bubbles, and discharge the mixture. [Means for solving the problem]

[0011] A mixing container according to another embodiment of the present disclosure has two or more filling sections, each separately filled and sealed, and a mixing section equipped with a mixing-promoting structure for mixing the two or more liquids, and between the filling section and the mixing section, there is a fluid section for moving the liquids, and there are two or more fluid sections, with the mixing section between the fluid sections, and the filling section, the mixing section and the fluid section are formed from a material including a flexible film.

[0012] Furthermore, in a mixing container according to another embodiment of the present disclosure, it is preferable that the mixing-promoting structure is formed by bonding together a portion of the inner surfaces of the material including the flexible film.

[0013] Furthermore, in a mixing container according to another embodiment of this disclosure, the mixing promoting structure is preferably a molded article.

[0014] Furthermore, in a mixing container according to another embodiment of the present disclosure, it is preferable that the mixing promoting structure ensures that the degree of mixing of the two or more liquid substances is 0.7 or higher.

[0015] Furthermore, in a mixing vessel according to another embodiment of the present disclosure, it is preferable that the cross-sectional area of ​​the mixing section is 1 / 2 or less of the cross-sectional area of ​​the fluid section.

[0016] Furthermore, in a mixing container according to another embodiment of the present disclosure, it is preferable that the adhesion between the inner surfaces of the mixing parts is in dots.

[0017] Furthermore, in a mixing container according to another embodiment of the present disclosure, it is preferable that the adhesion between the inner surfaces of the mixing parts is linear.

[0018] Furthermore, in a mixing container according to another embodiment of the present disclosure, it is preferable that the filling section, the mixing section, and the fluid section are formed from the flexible film and the rigid sheet.

[0019] In addition, in the mixing container according to another embodiment of the present disclosure, it is preferable to have a pressing and peeling part that can be peeled by pressing the filling part between the filling part and the mixing part or the flowing part.

[0020] In addition, in the mixing container according to another embodiment of the present disclosure, the material containing the flexible film has an oxygen barrier property of 3 ml / m 2 ·day·MPa or less at 23°C, and a water vapor barrier property of 3 g / m 2 ·day or less at 40°C and 90% RH, which is preferable.

[0021] The mixing method according to the present disclosure has a mixing part including two or more filling parts filled and sealed separately with two or more liquid substances to be mixed, and a mixing promoting structure for mixing two or more of the liquid substances. In a mixing container having a fluid section adjacent to the mixing section for moving the liquid, The filling part and the mixing part are formed of a material containing a flexible film. , the above Fill two or more filling parts of the mixing container with two or more liquid substances, seal the filling parts filled with the liquid substances, and move two or more of the liquid substances by pressing the filling parts. The liquid is moved from the filling section through the mixing section to the fluid section, and by pressing the fluid section, the liquid is moved and passed through the mixing section. Pass the mixing part two or more times to mix two or more of the liquid substances. In addition, the mixing method according to another embodiment of the present disclosure has a mixing part including two or more filling parts filled and sealed separately with two or more liquid substances to be mixed, and a mixing promoting structure for mixing two or more of the liquid substances. It has a flowing part for moving the liquid substances between the filling part and the mixing part. There are two or more of the flowing parts, and the mixing part is provided between the flowing parts. The filling part, the mixing part, and the flowing part are formed of a material containing a flexible film. Fill two or more filling parts of the mixing container with two or more liquid substances, seal the filling parts filled with the liquid substances, and move the liquid substances from the filling parts to the flowing parts by pressing the filling parts. Move two or more of the liquid substances by pressing the flowing parts, pass the mixing part two or more times, and mix two or more of the liquid substances.

[0022] Furthermore, in the mixing method according to this disclosure, by passing the two or more liquids through the mixing section equipped with the mixing promoting structure, the degree of mixing of the two or more liquids is 0.7 or higher, and the degree of mixing is 1-σ 2 / σ0 2 Represented by σ 2 This is the concentration dispersion after mixing, σ0 2 Preferably, the two or more liquid substances that exhibit maximum dispersion before mixing are used.

[0024] Furthermore, in the mixing method according to this disclosure, it is preferable to fill the filling section with the liquid, then expose it to reduced pressure to remove gas from the mixing container, and then seal the filling section filled with the liquid.

[0025] Furthermore, in the mixing method according to this disclosure, it is preferable to move the liquid by passing the filling section and / or the fluid section between two rolls and pressing the filling section and / or the fluid section with the rolls.

[0026] Furthermore, in the mixing method according to this disclosure, it is preferable to move the liquid while controlling the temperature of the mixing container.

[0027] Furthermore, in the mixing method according to this disclosure, it is preferable to move the liquid by peeling off a pressure-peelable portion formed between the filling portion and the mixing portion or the fluid portion, which can be peeled off by pressing.

[0028] Furthermore, in the mixing method according to this disclosure, it is preferable that the liquid is a resin and a curing agent used in any of the following applications in the field of electronic equipment: adhesives, sealants, thermal conductive materials, electrical insulating materials, conductive materials, underfills, or hole-filling inks.

[0029] Furthermore, in the mixing method according to this disclosure, it is preferable that the mixing container is subjected to the mixing of the liquids in a state in which the adhesion of particles to the outer surface and inner wall surface is suppressed.

[0030] Furthermore, in the mixing method relating to this disclosure, the mixing container On the outer and inner wall surfaces, it is preferable that the concentration of sodium, potassium, chlorine, and sulfate ions is 2.0 μg / container or less for each ion species. [Effects of the Invention]

[0031] The present disclosure provides a mixing container having two or more filling sections, each separately filled and sealed, for two or more liquids to be mixed, and a mixing section adjacent to the filling sections, which includes a mixing-promoting structure for mixing the two or more liquids, wherein the filling sections and the mixing section are formed from a material including a flexible film. This container can hold two or more liquids, prevent the inclusion of air bubbles immediately before use, and mix the two or more liquids in a short time. Compared to conventional methods of mixing using an apparatus or separate mixing device, a small amount of liquid can be mixed using a simple mixing container, and the mixed liquid can be used without waste. [Brief explanation of the drawing]

[0032] [Figure 1] A mixing container according to an embodiment of this disclosure is shown. [Figure 2] A cross-section of a mixing vessel according to an embodiment of this disclosure is shown. [Figure 3] The present disclosure shows a method for manufacturing a mixing container according to an embodiment of this disclosure. [Figure 4] This invention provides a method for manufacturing a flexible film for a mixing container according to an embodiment of this disclosure. [Figure 5] This shows a mixing-promoting structure for the mixing section of a mixing container according to an embodiment of the present disclosure. [Figure 6] This shows a mixing-promoting structure for the mixing section of a mixing container according to an embodiment of the present disclosure. [Figure 7] Other mixing vessels relating to embodiments of this disclosure are shown. [Figure 8] Other mixing vessels relating to embodiments of this disclosure are shown. [Figure 9] The mixing method according to the embodiments of this disclosure is shown. [Figure 10] The mixing method according to the embodiments of this disclosure is shown. [Modes for carrying out the invention]

[0033] A mixing container according to an embodiment of the present disclosure is shown in Figure 1. The mixing container is made of a material including a flexible film. It may be made of two flexible films. It may be made of one flexible film and one rigid sheet. It may also be made of one flexible film.

[0034] Figure 1 shows a plan view of a mixing container composed of two flexible films or one flexible film and one rigid sheet. Figure 1(A) includes filling sections 1A and 1B for filling liquids. The mixing container according to this application is for mixing liquids, and the liquids to be mixed are two or more types. Different liquids are filled into filling sections 1A and 1B. In Figure 1, two filling sections 1 are shown, but there may be three or more. When the mixing container is composed of two flexible films or one flexible film and one rigid sheet, the two flexible films or one flexible film and one rigid sheet are partially bonded together to form the filling section 1. Bonding is preferably done by heat sealing. Partial bonding using an adhesive is also acceptable.

[0035] In Figure 1(A), filling sections 1A and 1B are provided adjacent to each other via an adhesive section 6, and adjacent to filling sections 1A and 1B, a first fluid section 3, a mixing section 2, and another second fluid section 3 are provided sequentially. Filling sections 1A and 1B are individually filled with liquid and then sealed. When filling filling sections 1 with liquid, it is also acceptable to fill them through the filling port 4. In Figure 1, the filling port 4 is not adhesive and is not sealed, but after filling the required amount of liquid into filling sections 1A and 1B through the filling port 4, the inner surfaces of the filling port 4 are adhesively sealed. The sealing is achieved by providing the adhesive section 6.

[0036] After filling the filling sections 1A and 1B with the liquid, the mixing container is exposed to reduced pressure with the filling port 4 open to remove gases contained in the liquid and any remaining gases in the filling sections 1A and 1B. After removing the gases, the inner surfaces of the filling port 4 are sealed together under reduced pressure. This is to prevent gases from entering the mixture when the liquids are mixed. Alternatively, the entire mixing container may be exposed to reduced pressure beforehand to remove any gases before filling with the liquid.

[0037] The inner surfaces of the filling sections 1A and 1B and the adjacent first fluid section 3 are bonded together. Here, the filling sections 1A and 1B are separated from the first fluid section 3 by an adhesive section 6. The adhesive section 6 that separates the filling sections 1A and 1B from the first fluid section 3 is convex on the side facing the filling sections 1A and 1B. By pressing the filling sections 1A and 1B and peeling off the convex adhesive section 6, the liquid is moved from the filling sections 1A and 1B to the first fluid section 3. When pressed, pressure is applied to the convex apex of the adhesive section 6, which can cause the inner surface of the adhesive section 6 to peel off.

[0038] In Figure 1(A), a first fluidized section 3, a mixing section 2, and another second fluidized section 3 are sequentially provided adjacent to the filling sections 1A and 1B. An outlet 5 is provided in the other second fluidized section 3. After filling with liquid, the mixing container is exposed to reduced pressure. At this time, any gas remaining in the mixing section 2, the first fluidized section 3, and the second fluidized section 3 is discharged through the outlet 5. After removing the gas, the inner surfaces of the outlet 5 are sealed by bonding them together under reduced pressure. This is to prevent gas from entering the mixture when mixing the liquids.

[0039] In Figure 1(A), the filling port 4 is provided to be shorter than the length of the edges of the filling sections 1A and 1B. However, the size of the opening of the filling port 4 can be any length. The entire edge can also be considered the filling port 4.

[0040] The filling sections 1A and 1B, the mixing section 2, and the fluid section 3 are rectangular in shape, but they may be partially or entirely formed by curves. Even if the outer shape of the mixing container is rectangular, it is preferable that the inside of the corners of the mixing container are not bonded at a right angle, but rather bonded in a curved or chamfered manner. By shaping the corners in this way, the accumulation of liquid can be prevented. A curved shape means a chamfer of R1 or more. A chamfered shape means a corner cut of C1 or more.

[0041] In Figure 1, the outlet 5 is also provided to be shorter than the length of the end of the second fluid section 3. However, the size of the opening of the outlet 5 can be any length. The entire end can also be used as the outlet 5. The outlet 5 is an opening for discharging liquids after mixing. When the mixture is discharged by cutting the inner surface of the adhesive section 6 that seals the outlet 5, as shown in Figure 1(A), a narrow opening for the outlet 5 can be used to limit the area where the mixture is applied, and the amount of discharge can be easily adjusted.

[0042] The mixing section 2 is equipped with a mixing-promoting structure. The mixing-promoting structure mixes two or more flowing liquids. The mixing-promoting structure promotes mixing by disturbing the flow of the liquids. The structure that disturbs the flow is static. The mixing-promoting structure can be formed in the mixing section 2 by bonding a part of the inner surface of the mixing section 2 or by providing a separately molded product to the mixing section 2.

[0043] The fluid section 3 is a flow path that moves liquids from the filling section 1 to the mixing section 2. Two or more liquids are mixed by moving them simultaneously from the filling section 1 through the first fluid section 3 to the mixing section 2. The mixed liquids are then moved from the mixing section 2 to the second fluid section 3. The mixed liquids are stored in the second fluid section 3, and after all of them have been moved, they are moved from the second fluid section 3 to the mixing section 2. Mixing of the liquids is promoted by passing two or more liquids through the mixing section 2 simultaneously. The passage of liquids through the mixing section 2 is repeated two or more times.

[0044] Figure 1(A) shows a filling section 1A, a filling section 1B, and two fluid sections 3. Alternatively, filling sections 1A and 1B may be omitted, and different liquids may be filled into each of the two fluid sections. Furthermore, if three or more different liquids are to be mixed, three or more filling sections 1 may be provided. A filling port 4 is provided in each fluid section 3, and the liquid is filled into each fluid section 3 through the filling port 4. In this case, an adhesive section 6 is provided between the fluid section 3 being filled and the mixing section 2, and the adhesive section 6 is convex towards the fluid section 3 that also serves as the filling section. The discharge port 5 may be provided in either the mixing section 2 or the two fluid sections 3. After filling with the liquid, the mixing container is exposed to reduced pressure to remove any remaining gas from the liquid, mixing section 2, and the fluid section 3 that also serves as the filling section, and then sealed.

[0045] As described above, when the fluid section 3 also serves as the filling section 1, the liquid is moved from one first fluid section 3 through the mixing section 2 to the other second fluid section 3, and then the liquid is moved from the other second fluid section 3 through the mixing section 2 to the first fluid section 3 to mix them. This process is repeated two or more times to mix two or more types of liquids.

[0046] Figure 1(B) shows a mixing container in which the filling section 1A and filling section 1B are not adjacent to the fluid section 3, but are separately provided on the side of one of the first fluid sections 3. The separately provided filling section 1A and filling section 1B each have a filling port 4. The discharge port 5 is provided in the second fluid section 3. The discharge port 5 may also be provided in the first fluid section or the mixing section 2. Liquid material is filled into the filling section 1A and filling section 1B from the filling port 4. At the point where the liquid material is moved from the filling section 1A and filling section 1B, a convex adhesive portion 6 is provided on the inside of the filling section 1A and filling section 1B, and the liquid material is moved by pressing the filling section 1A and filling section 1B respectively to peel off the adhesive portion 6.

[0047] After filling the container with liquid from filling sections 1A and 1B, the mixing container is exposed to reduced pressure to remove any remaining liquid and gas from the container, and then the filling port 4 and discharge port 5 are sealed under reduced pressure.

[0048] The liquid moving from filling sections 1A and 1B is transferred to the fluid section 3 via the flow path, and the process thereafter is the same as in Figure 1(A).

[0049] Figure 1(C) shows a mixing container in which the filling section 1A and filling section 1B are not adjacent to the fluid section 3 together, but are provided separately on each side of the two fluid sections 3. For example, the filling section 1A is provided on the side of the first fluid section 3, and the filling section 1B is provided on the side of the second fluid section 3. A third fluid section 3 is provided adjacent to the mixing section 2, separate from the first and second fluid sections 3. The separately provided filling sections 1A and 1B each have a filling port 4. Liquid material is filled into the filling sections 1A and 1B from the filling port 4. At the point where the liquid material is moved from the filling sections 1A and 1B, a convex adhesive portion 6 is provided on the inside of the filling sections 1A and 1B, and the adhesive portion 6 is detached by pressing the filling sections 1A and 1B respectively, thereby moving the liquid material.

[0050] Although the discharge port 5 is provided in the third fluid section 3, it may also be provided in the other fluid section 3 or the mixing section 2. After filling the filling section 1A and filling section 1B with the liquid, the mixing container is exposed to reduced pressure to remove any remaining gas in the liquid and mixing container, and then the filling port 4 and discharge port 5 are sealed under reduced pressure.

[0051] Figure 1(C) shows a mixing container where the filling section 1A and filling section 1B are not adjacent to the fluid section 3 together, but are provided separately on the side of two or more fluid sections 3. However, as shown in Figure 1(B), the first fluid section 3, the mixing section 2, and another second fluid section 3 may be provided sequentially adjacent to the filling section 1A and filling section 1B.

[0052] The liquids moving from filling sections 1A and 1B are moved to the first fluid section 3 and the second fluid section 3, and almost simultaneously, the liquids are moved from both fluid sections 3 to the mixing section 2 and mixed. The mixed liquids are moved to the third fluid section 3 adjacent to the mixing section 2, and after the mixture is moved to the third fluid section 3, the liquids are moved to the mixing section 2, and then to the first fluid section 3 and / or the second fluid section, and the moved liquids are moved through the mixing section 2 to the third fluid section 3 and mixed. This is repeated two or more times to mix two or more liquids. The inner surface of the adhesive section 6 that seals the discharge port 5 is cut and the mixture is discharged.

[0053] The areas of the filling section 1, mixing section 2, and fluid section 3 are designed appropriately depending on the type and required amount of the liquid.

[0054] Liquids are substances that perform their function by mixing two or more of them immediately before use. They are particularly used in the field of electronic equipment. Examples include adhesives, sealants, thermal conductive materials, electrical insulating materials, conductive materials, underfills, and hole-filling inks. Many of these applications require the avoidance of air bubbles, so the invention described herein, which allows for the mixing of two or more liquids without introducing air bubbles, is useful.

[0055] Adhesives include epoxy adhesives, which are used for fixing circuit boards and sealing components, and acrylic adhesives, which are used for bonding metals and / or plastics. Epoxy adhesives require two liquid substances: epoxy resin and a hardener. Acrylic adhesives require two liquid substances: acrylic resin and a curing accelerator.

[0056] The encapsulants include epoxy resin encapsulants used to impart heat and moisture resistance and to encapsulate semiconductors, silicone encapsulants used for encapsulating LEDs, and polyurethane encapsulants used for encapsulating areas where flexibility is required. Epoxy resin encapsulants require two liquid substances: epoxy resin and a curing agent. Silicone encapsulants require two liquid substances: silicone resin and a curing agent. Polyurethane encapsulants require two liquid substances: polyol and an isocyanate curing agent. If air bubbles are present in the encapsulant, stress concentration occurs, which can become the starting point for cracks and resin delamination, leading to damage to chips and wire bonding areas. It can also cause ion migration and leakage current.

[0057] Thermal conductive materials (TIMs) refer to thermal conductive greases used for heat dissipation in CPUs and power devices, or thermal conductive epoxys used for fixing heat sinks. Thermal conductive greases require two liquid components: a polyol containing a thermal conductive material and an isocyanate curing agent. Thermal conductive epoxys require two liquid components: an epoxy resin containing a thermal conductive material and a curing agent. If voids exist in the TIM, heat will not be transferred properly, leading to chip overheating and failure, or shortening the chip's lifespan.

[0058] Electrical insulating materials include potting materials used to insulate transformers and coils, and coating materials used to protect circuit boards. Potting materials require two liquid substances: epoxy resin or acrylic resin and a hardener. Coating materials require three liquid substances: epoxy resin or acrylic resin, a hardener, and a curing catalyst. If voids are present in electrical insulating materials, these voids become the starting point for dielectric breakdown, significantly reducing reliability.

[0059] Conductive materials include conductive epoxy used for chip bonding and electromagnetic shielding, and silver paste used for circuit formation and sensor contacts. Conductive epoxy requires two liquid substances: epoxy resin containing conductive fillers and a hardener. Silver paste also requires two liquid substances: resin containing silver powder and a hardener. If there are voids in conductive paste, the electrical conductivity and resistance become unstable, which can become the starting point for cracks, leading to connection failures and reduced reliability.

[0060] Underfill refers to a type of underfill formed between a semiconductor chip and an organic substrate, such as capillary underfill (CUF), molded underfill (MUF), or no-flow underfill (NUF). It supports the semiconductor chip and substrate not only with solder bumps but also with resin, improving the reliability of the joint. Underfill consists of epoxy resin, a hardener, and an inorganic filler, and is typically used with a low viscosity of around 100-1000 mPa·s. Voids in the underfill coating can cause bump cracks and reduced insulation, significantly increasing the reliability risk.

[0061] Hole-filling ink is used to reinforce conductive vias and blind vias by filling them with resin, with the aim of preventing absorption during soldering, forming flat pads in high-density mounting, and improving the reliability of interlayer connections. Hole-filling ink consists of epoxy resin, a hardener, and an inorganic filler, and is used with a viscosity of approximately 100,000 mPa·s. The presence of voids inside vias can lead to poor conductivity, delamination, and reduced reliability due to cracks.

[0062] As mentioned above, the most commonly used combination is epoxy resin and curing agent. Examples of epoxy resins include bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, bisphenol AF type epoxy resin, dicyclopentadiene type epoxy resin, trisphenol type epoxy resin, naphthol novolac type epoxy resin, phenol novolac type epoxy resin, tert-butyl-catechol type epoxy resin, naphthalene type epoxy resin, naphthol type epoxy resin, anthracene type epoxy resin, glycidylamine type epoxy resin, glycidyl ester type epoxy resin, cresol novolac type epoxy resin, biphenyl type epoxy resin, linear aliphatic epoxy resin, epoxy resin having a butadiene structure, alicyclic epoxy resin, heterocyclic epoxy resin, spiro-ring containing epoxy resin, cyclohexanedimethanol type epoxy resin, naphthylene ether type epoxy resin, trimethylol type epoxy resin, tetraphenylethane type epoxy resin, etc. Epoxy resins may be used individually or in combination of two or more types.

[0063] The curing agent is a substance that has the function of curing epoxy resin, and examples include phenolic curing agents, naphthol curing agents, active ester curing agents, benzoxazine curing agents, cyanate ester curing agents, polyamine curing agents, imidazole curing agents, diaminodiphenylmethane and carbodiimide curing agents, and blocked isocyanates. The curing agent may be used alone or in combination of two or more types.

[0064] The viscosity of the main component of the aforementioned liquid mixture is 500 to 100,000 mPa·s at 25°C, and mixtures containing solids such as fillers may have even higher viscosities. The curing agent has a viscosity of 1 to 10,000 mPa·s. Mixtures of high-viscosity and low-viscosity liquids are common, and uniform mixing is required.

[0065] If the viscosity is high, mixing may be insufficient. It is preferable to move the liquid while controlling the temperature of the mixing container. Temperature control means heating the mixing container before mixing. This can be done by immersing it in temperature-controlled hot water or storing it in a temperature-controlled oven for a certain period of time. By mixing immediately after heating, the viscosity of the liquid is reduced, allowing for smooth mixing. Mixing can also be done in temperature-controlled hot water or in a temperature-controlled oven.

[0066] Figure 2 shows cross-sections of the filling section 1, mixing section 2, and fluid section 3. It is preferable that the filling section 1, mixing section 2, and fluid section 3 form spaces to facilitate the smooth filling or movement of liquids. Figure 2(A) shows a case where the mixing container is composed of two flexible films. The two flexible films are thermoformed to form spaces. Figure 2(A) shows a mixing container formed by thermoforming two flexible films and bonding the thermoformed first flexible film 7A and second flexible film 7B with adhesive sections 6, with the recessed parts of the molded products facing inward. Alternatively, the mixing container may be formed by bonding a thermoformed flexible film to an unmolded flexible film.

[0067] Figure 2(B) shows a case where the container is composed of one molded flexible film 7 and one rigid sheet 8. The filling section 1 and mixing section 2, which are essential for a mixing container, must be made of a material containing a flexible film. When moving a liquid, it is moved by external pressure. For this purpose, the container must be made of a material containing a flexible film that allows for easy pressure. If it is not made of a material containing a flexible film, the liquid cannot be moved smoothly.

[0068] Figure 2 shows that a mixing container is formed by bonding molded films together, but the mixing container may also be formed from a single flexible film. Alternatively, a molded product with a space formed by blow molding can be obtained, and a filling section 1, a mixing section 2, and a fluid section 3 can be appropriately provided to it to form a mixing container.

[0069] Figure 3 shows a method for thermoforming the flexible film 7. Figure 3(A) shows the flexible film 7 before thermoforming. The flexible film is made of a thermoplastic resin, and the thermoplastic resin is one or more of these, and two or more may be mixed or multilayered.

[0070] In particular, the inner surface of the flexible film 7 of the mixing container is preferably made of polyethylene polymer, polypropylene polymer, or fluororesin. The mixing container is exposed to reduced pressure to remove gas and then sealed, but it is necessary to prevent gas from entering the inside of the mixing container over time. For this purpose, the material including the flexible film has a viscosity of 3 ml / m² at 23°C. 2 • Oxygen barrier properties below day·MPa, and at 40°C and 90% RH, 3g / m² 2 It is preferable to have a water vapor barrier property of less than 1 day. To impart oxygen barrier properties, it is preferable that the material containing the flexible film includes an ethylene-vinyl alcohol copolymer as a layer. Furthermore, to impart water vapor barrier properties, it is preferable to include one or more of high-density polyethylene, polypropylene polymers, or cyclic polyolefins as a layer.

[0071] The gases that enter a mixing container include not only oxygen and water, but also nitrogen, carbon dioxide, and other gases. If the oxygen barrier properties are good, the entry of these other gases can also be suppressed.

[0072] In containers for semiconductor liquids, contamination by foreign matter and ions must be avoided. On the outer and inner surfaces of the container, it is preferable that the number of foreign matter particles larger than 0.5 μm be 100 particles / square centimeter or less, and it is even more preferable that the number of foreign matter particles larger than 0.2 μm be 50 particles / square centimeter or less. For ions such as sodium, potassium, chlorine, and sulfate, it is preferable that the concentration of each ion species be 2.0 μg / container or less, with a total ion concentration of 5.0 μg / container, and it is even more preferable that the concentration of each ion species be 1.0 μg / container or less, with a total ion concentration of 3.0 μg / container.

[0073] If container cleaning is necessary, it can be done in the film or sheet state, or after thermoforming. Cleaning can be performed using primary cleaning with ultrapure water, acid cleaning, secondary cleaning with ultrapure water, and IPA cleaning.

[0074] The number of foreign particles is measured by washing the surface of the mixing container with filtered, non-foreign-free water and then measuring the number of foreign particles in the washed water using a particle counter. Alternatively, the measurement may be performed by directly observing the inner surface of the container using a scanning electron microscope (SEM) or laser microscope. Ion levels are measured by washing the surface of the mixing container with ion-free water passed through an ion exchange resin and then measuring the amount of ions in the washed water using methods such as potentiometric titration, electrode method, atomic absorption spectrometry, or ion chromatography.

[0075] For materials containing a non-thermoformable flexible film, an aluminum foil layer may be provided, and the high barrier properties of the aluminum foil on one side may be given to the mixing container. Alternatively, the entire mixing container can be vacuum-packed with a film containing aluminum foil to prevent gas from entering the container.

[0076] The flexible film is preferably 10 μm or more and 500 μm or less in thickness. A thickness of 30 μm or more and 250 μm or less is more preferable. A thickness of less than 10 μm may cause breakage. If the thickness exceeds 500 μm, the flexibility is low and the movement of liquids may not be smooth. However, the flexibility varies depending on the resin that makes up the flexible film. It is acceptable even if the thickness exceeds 500 μm as long as the liquid can move.

[0077] The flexible film 7 preferably has an elastic modulus of 10 MPa or more and 2000 MPa or less, as determined by a tensile test in accordance with JIS K7127:1999. Below 10 MPa, it is difficult to handle, and above 2000 MPa, the rigidity is too high, making it difficult to move liquids.

[0078] Figure 3(B) shows the process of thermoforming the flexible film 7. The flexible film 7 is heated and pressed against a cooled mold 9 to form the shape of the mold 9. The mold 9 has pores in various places, and the flexible film 7 is pressed against the mold 9 and formed by suction through these pores. This is vacuum forming. Alternatively, air pressure forming may be used in combination, in which air is blown onto the flexible film 7 from above to press it against the mold 9.

[0079] The flexible film 7 may be pressed from above with an upper mold and then pressed into a bottom mold, which is a molding die 9, by matching mold molding. The flexible film 7 may also contain an aluminum foil layer. The flexible film 7 containing an aluminum foil layer can be molded into an aluminum foil layer by matching mold molding.

[0080] The depth of the recess into which the flexible film 7 is formed is appropriately determined by the various parts of the mixing container in the filling section 1, mixing section 2, and fluid section 3, as well as the liquid material. For example, it is between 1 mm and 100 mm. Less than 1 mm does not provide sufficient space. More than 100 mm makes molding difficult.

[0081] The value obtained by dividing the depth of the recess by the width of the molding, i.e., the reduction ratio, is preferably between 1 / 100 and 3. If the reduction ratio is less than 1 / 100, sufficient space cannot be secured. If the reduction ratio exceeds 3, molding becomes difficult.

[0082] It is desirable that the depth of the recess in the mixing section 2 be smaller than the depth of the filling section 1 and the fluid section 3. In particular, when the mixing-promoting structure provided in the mixing section 2 is attached by internal adhesion, it is desirable to reduce the depth of the recess. It is desirable that the molding width of the mixing section 2 be smaller than that of the filling section 1 and the fluid section 3. As a result, it is desirable that the cross-sectional area of ​​the space in the mixing section 2 be 1 / 2 or less of the cross-sectional area of ​​the fluid section 3. By reducing the cross-sectional area of ​​the mixing section 2, when the liquid is moved, the pressure of the liquid in the mixing section 2 becomes higher than in the fluid section 3, improving the mixing effect.

[0083] Figure 3(C) shows the process of bonding the molded flexible film 7 and the rigid sheet 8. Bonding is performed by pressing the bonding portion 6 with a sealing bar 10. The sealing bar 10 is heated, and at least one of the bonding surfaces of the flexible film 7 and / or the rigid sheet 8 is melted by the heated sealing bar 10, thereby bonding by heat fusion. This shows bonding by heat sealing. Bonding by heat sealing is preferable. Similarly, even when bonding flexible films to each other, heat sealing is preferable. Similarly, sealing of the filling port 4 and the discharge port 5 is also preferably done by heat sealing. Bonding the liquid side of the filling portion 4 in a convex shape is also preferably done by heat sealing. Heat sealing may be performed by heating the sealing bar 10 as shown in Figure 3(C), but it may also be performed by heating with ultrasound.

[0084] When moving the liquid side of the filling section 1, the convex heat seal portion must be peeled off by pressing the filling section 1. It is preferable that the end of the seal bar 10 that performs the convex heat seal is not at a right angle. It is preferable that the end is chamfered or processed into a curved shape. If the end of the heat seal bar 10 is at a right angle, the end of the heat-sealed fusion portion may bite into the other side, and the convex end may not peel off even when the filling section 1 is pressed.

[0085] To facilitate the removal of the convex heat seal, a film designed to facilitate removal may be sandwiched between the convex heat seal portion before heat sealing. If the heat seal surface of the flexible film 7 is polyethylene, a film mixed with a resin incompatible with polyethylene may be sandwiched between the heat seal. Examples include a film mixed with polyethylene and polybutene, or a film mixed with polyethylene and styrene-based resin. Similarly, if the heat seal surface is polypropylene, a film mixed with a resin incompatible with polypropylene may be sandwiched between the heat seal. An example is a film mixed with high-density polyethylene. Because the sandwiched film has low cohesive force, increasing the internal pressure of the liquid causes the sandwiched film to cohesively break and peel off due to the stress acting on it.

[0086] Figure 4 shows the manufacturing process of the flexible film 7. As shown in Figure 4(A), the flexible film 7 may be a single layer. Even when used as a single layer, it may be a multilayer structure of two or more resins, as mentioned above.

[0087] If the individual film does not satisfy the requirements for barrier properties, heat resistance, pinhole resistance, etc., it may be laminated with a different film. Figure 4(B) shows a case where a sealant 12, which has a lower melting point than the base material 11 and is easy to heat seal, is laminated onto the base material 11. The laminated body is used as a flexible film 7. Lamination is performed by known methods such as dry lamination and extrusion lamination.

[0088] Figure 4(C) shows a case where the two-layer laminate shown in Figure 4(B) does not provide sufficient functionality, and a barrier film 13 is further laminated between the substrate 11 and the sealant 12. The barrier film is expected to be an ethylene-vinyl alcohol copolymer to enhance oxygen barrier properties. When used as an unmolded flexible film 7, it may also be aluminum foil. By laminating aluminum foil and using the matching mold method, the aluminum foil can be included in the thermoforming. Lamination is carried out by known methods.

[0089] Fig. 5 shows the mixing promotion structure provided in the mixing section 2. This mixing promotion structure is formed by adhering a part of the inner surfaces of materials including the flexible film 7. The adhesion between the inner surfaces is preferably performed by heat sealing.

[0090] The mixing promotion structure may be a molded product. The molded product is not limited in terms of materials such as resin, metal, etc. The shape should be such that it disturbs the flow with respect to the flow path. Examples include combinations of injection molded products made of resin, combinations of metal processed products, etc. The molded product is locked inside the mixing section 2. When the mixing promotion structure is a molded product, there will be wasted liquid substances because the liquid substances remaining inside the mixing section 2 cannot be completely discharged. Therefore, when the molded product is used as the mixing promotion structure, it is necessary to make the molded product as small as possible.

[0091] The degree of mixing DOM of the liquid substances by the mixing promotion structure is preferably 0.7 or more. If it is less than 0.7, the mixing efficiency is poor. The degree of mixing DOM is expressed as 1-σ 2 / σ0 [[ID=ll]] 2 σ 2 represents the concentration dispersion after mixing, σ0 2 represents the maximum dispersion before mixing (completely unmixed state), DOM = 0 represents the unmixed state, and DOM = 1 represents the completely mixed state.

[0092] The measurement method can be the tracer method of introducing a coloring agent or a fluorescent agent as a tracer and measuring the concentration distribution by the flow field and sampling, or the spectroscopic method or the fluorescence method of non-contact measurement of the local concentration from the absorbance or fluorescence intensity.

[0093] Fig. 5(A) shows the mixing promotion structure in which the adhesion between the inner surfaces of the mixing section 2 is linear. The number, length, and angle of the lines are determined arbitrarily. Also, the lines do not have to be straight and the angle may be changed halfway. They can be curves or include curves and straight lines.

[0094] Figure 5(B) shows a mixing-promoting structure in which the inner surfaces of the mixing section 2 are bonded together by dots. The number, shape, and size of the dots can be determined arbitrarily. Furthermore, the dots do not have to be elliptical; they can be circular, square, polygonal, or a combination of two or more shapes.

[0095] Figure 5(C) shows a mixing-promoting structure in which the inner surfaces of the mixing section 2 are bonded together and protrude inward. The flow path is narrowed within the mixing container 2. In Figure 5(C), the protruding shape is a combination of a rectangle and a trapezoid, but the shape and size can be determined arbitrarily. Furthermore, any shape is acceptable, such as a semicircle, semiellipse, rectangle, polygon, or a combination of two or more shapes.

[0096] When the inner surface of the mixing section 2 is bonded together to create a mixing-promoting structure, linear, dotted, and inwardly protruding shapes may be combined as appropriate.

[0097] Figure 6 shows a cross-section of the mixing-promoting structure when the adhesion between the inner surfaces of the mixing section 2 is in the form of dots. Figure 6 shows the case where two dots are arranged in parallel, but as mentioned above, they do not have to be in parallel, there can be three or more, and the shape and size can be arbitrarily determined. The cross-section in direction a of Figure 6(A) is shown in Figures 6(B-1), 6(C-1), and 6(D-1), and the cross-section in direction b is shown in Figures 6(B-2), 6(C-2), and 6(D-2).

[0098] Figure 6(B-1) shows a cross-section of the mixing section 2, where a molded flexible film 7 and a rigid sheet 8 are bonded together. The bonded section 6 adheres the molded flexible film 7 and the rigid sheet 8, and the molded flexible film 7 forms the space of the mixing section 2. Figure 6(B-2) shows a cross-section including bonded dots. The dots indicate where the molded flexible film 7 and the rigid sheet 8 are bonded. In this case, there are three places where the flow path is narrowed. By dividing the flow path into two or more sections and narrowing them, mixing can be performed smoothly.

[0099] Figure 6(C-1) shows a cross-section of the mixing section 2 where two molded flexible films 7 are bonded together. The bonding section 6 adheres the two molded flexible films 7 together, forming the space of the mixing section 2. Figure 6(C-2) shows a cross-section including the bonded dots. The dots indicate where the molded flexible films 7 are bonded together.

[0100] Figure 6(D-1) shows a cross-section of the mixing section 2 where the inner surfaces of two blow-molded flexible films 7 are bonded together. The bonding section 6 adheres the inner surfaces of the blow-molded flexible films 7 together, forming the space of the mixing section 2 with a single blow-molded flexible film 7. Figure 6(D-2) shows a cross-section including the bonded dots. The dots indicate where the inner surfaces of the blow-molded flexible films 7 are bonded together. In this case, there are three places where the flow path is narrowed. By dividing the flow path into two or more sections and narrowing them, mixing can be performed smoothly.

[0101] Figure 7 shows a mixing container in which the fluid section 3 is a single unit, and the mixing section 2 is located between one end of the fluid section 3 and the other end. The single fluid section 3 is formed to be closed in a straight line, with the mixing section 2 in between. To form the fluid section 3 in a straight line, the center is bonded by an adhesive section 6. Unnecessary parts of this adhesive section 6 may be removed so as not to overlap with the fluid section 3. The filling sections 1A and 1B are provided outside the fluid section 3. A part of the fluid section 3 may be divided, a filling section 1 may be provided, and two or more liquids may be filled. Alternatively, one filling section 1 may be provided on the outside, and one filling section 1 may be provided on the fluid section 3. Two or more liquids are mixed by moving the liquids from the fluid section 3 to the mixing section 2 two or more times. The direction of movement may be constant, or a combination of opposite directions may be used.

[0102] Figure 8 shows a mixing container in which the fluid section 3 is a single unit, and the mixing section 2 is located between one end of the fluid section 3 and the other end. The single fluid section 3 is formed to close in a curve, with the mixing section 2 in between. To form the fluid section 3 in a curve, the center is bonded by an adhesive section 6. Unnecessary parts of this adhesive section 6 may be removed so as not to overlap with the fluid section 3. The filling sections 1A and 1B are provided outside the fluid section 3. A portion of the fluid section 3 may be divided, a filling section 1 may be provided, and two or more liquids may be filled. Alternatively, one filling section 1 may be provided outside, and one filling section 1 may be provided inside the fluid section 3. Two or more liquids are mixed by moving the liquids from the fluid section 3 to the mixing section 2 two or more times. The direction of movement may be constant, or a combination of opposite directions may be used.

[0103] Figure 7 shows a single fluidized section 3 formed linearly with the mixing section 2 in between, while Figure 8 shows it formed curvedly. A single fluidized section 3 can also be formed by combining straight and curved lines. Figure 8 is preferable because, being circular, the fluidized section 3 is smooth and convection is less likely to occur inside the fluidized section 3.

[0104] Figure 9 shows a method for moving a liquid between a mixing section 2 and a fluid section 3 in a mixing container in which the fluid section 3 is a single fluid section and the mixing section 2 is located between one end of the fluid section 3 and the other end. When moving the liquid in the mixing section 2 and the fluid section 3, it is also possible to move it while pressing it with a finger. As shown in Figure 9, the liquid may also be moved by pressing the fluid section 3 containing the liquid with a roll 14. By pressing with the roll 14, it is possible to uniformly press all of the liquid present in the pressed area, allowing for smooth movement. This method allows for more reliable movement of the liquid than pressing with a finger. This is particularly effective when the liquid is highly viscous.

[0105] Figure 9 shows the fluid section 3 being pressed by the roll 14, but the filling section 1 and mixing section 2 may also be pressed by the roll 14 when moving the liquid material present. Figure 9 shows a method of moving liquid material between the mixing section 2 and the fluid section 3 of a mixing container having the mixing section 2 between one end of the fluid section 3 and the other end, but even in a mixing container with the configuration shown in Figure 1, the liquid material present in the filling section 1, mixing section 2 and fluid section 3 may also be pressed by the roll 14 when moving it.

[0106] Figure 9(A) shows a method for moving a liquid while pressing a linearly closed fluid section 3 of a mixing container, which has a single fluid section 3 and a mixing section 2 between one end of the fluid section 3 and the other end, with a roll 14. Rolls 14 may be provided at two or more locations so that the linearly formed fluid section 3 can be pressed separately at different points.

[0107] Figure 9(B) shows a method for moving a liquid in a mixing container formed from a thermoformed flexible film 7 and a rigid sheet 8 by pressing the fluid section 3 from the thermoformed flexible film 7 side with a roll 14. By pressing one of the linearly formed fluid sections 3 with the roll 14, the liquid is moved from that fluid section 3 to the mixing section 2. The other fluid section 3 adjacent to the mixing section 2 is not pressed. Wait for the liquid to move through the mixing section 2. After the liquid has moved from one fluid section 3, the other fluid section 3 is pressed with the roll 14 to move the liquid.

[0108] Figure 9(C) shows a method for moving a liquid in a fluid section 3 of a mixing container formed by two molded flexible films 7A and 7B by pressing the fluid section 3 from both sides with two rolls 14. By pressing one of the linearly formed fluid sections 3 with the two rolls 14, the liquid is moved from that fluid section 3 to the mixing section 2. The other fluid section 3 adjacent to the mixing section 2 is not pressed. Wait for the liquid to move through the mixing section 2. After the liquid has moved from one fluid section 3, the other fluid section 3 is pressed with the two rolls 14 to move the liquid.

[0109] Figure 10 shows a method for moving liquids in a mixing container where the fluid section 3 is a single fluid section and the mixing section 2 is located between one end of the fluid section 3 and the other end, while pressing the curved, closed fluid section 3 with a roll 14. In this case, the roll 14 may be installed in only one location. By fixing the roll 14 and moving the mixing container, the fluid section 3 is pressed sequentially, moving the liquids from the fluid section 3 to the mixing section 2, and this is repeated two or more times to mix two or more liquids. [Explanation of symbols]

[0110] 1…Filling section 2…Mixing section 3… Fluid section 4… Filling port 5…Discharge port 6...Adhesive part 7…Flexible film 8…A rigid seat 9…Molding mold 10… Heat sealing bar 11...Base material 12…Sealant 13… Barrier film 14... Roll

Claims

1. The device has two or more filling sections, each separately filled and sealed, and a mixing section equipped with a mixing-promoting structure for mixing the two or more liquids. In a mixing container having a fluid section adjacent to the mixing section for moving the liquid, The filling section and the mixing section are formed from a material including a flexible film, and two or more of the filling sections of the mixing container are filled with two or more liquid substances. The filling section filled with the aforementioned liquid is sealed, A mixing method comprising: pressing the filling section to move two or more of the liquids; moving the liquids from the filling section through the mixing section to the fluid section; pressing the fluid section to move the liquids, passing them through the mixing section two or more times to mix the two or more of the liquids.

2. In the mixing method described in claim 1, By passing the two or more liquids through the mixing section equipped with the mixing-promoting structure, the degree of mixing of the two or more liquids is 0.7 or higher. The aforementioned degree of mixing is 1 - σ 2 / σ 0 2 Expressed as σ 2 This is the concentration dispersion after mixing, σ 0 2 A mixing method for mixing two or more of the aforementioned liquids that exhibit maximum dispersion before mixing.

3. In the mixing method according to claim 1 or claim 2, After filling the filling section with the liquid, expose it to reduced pressure to remove the gas in the mixing container. A mixing method for sealing the filling section filled with the aforementioned liquid.

4. In the mixing method according to claim 1 or claim 2, A mixing method in which the filling section and / or the fluid section are passed between two rolls, and the liquid is moved by pressing the filling section and / or the fluid section with the rolls.

5. In the mixing method according to claim 1 or claim 2, A mixing method comprising moving the liquid substance in the mixing container while controlling its temperature.

6. In the mixing method according to claim 1 or claim 2, A mixing method for moving the liquid by peeling off a pressure-peelable portion formed between the filling portion and the mixing portion or the fluid portion, which can be peeled off by pressure.

7. In the mixing method according to claim 1 or claim 2, A mixing method wherein the liquid is a resin and a curing agent used in any of the following applications in the field of electronic equipment: adhesive, sealant, thermal conductive material, electrical insulating material, conductive material, underfill, or hole-filling ink.

8. In the mixing method according to claim 1 or claim 2, A mixing method wherein the mixing container is subjected to the mixing of the liquid substances in a state in which the adhesion of particles to the outer surface and inner wall surface is suppressed.

9. In the mixing method according to claim 1 or claim 2, A mixing method wherein the amount of sodium, potassium, chlorine, and sulfate ions on the outer and inner surfaces of the mixing container is 2.0 μg / container or less for each ion species.

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