TWI577434B - Deaeration apparatus and deaeration method using the same - Google Patents

Description

Defoaming device and defoaming method using same

The invention relates to a defoaming device and a defoaming method thereof, and particularly relates to a defoaming device for defoaming a viscose and a defoaming method thereof

Traditionally, the air in the tank and the pipeline enters the glue during the process of blending the glue and conveying the glue. The air inside the glue will affect the subsequent bonding quality. When the adhesive is used in an optical product, the air inside the adhesive affects the display quality.

Therefore, it is urgent to propose a new defoaming device to remove the gas in the adhesive.

Accordingly, the present invention provides a defoaming apparatus and a defoaming method using the same to remove gas in the viscose.

According to an embodiment of the invention, a defoaming device is proposed. Defoaming device A defoaming device used to defoam a glue. The defoaming device comprises a large barrel, a small tank and a first exhaust pipe. The vat is used to perform a first defoaming procedure. The small tub is connected to the large tub and used to perform a second defoaming procedure. First exhaust The tube communicates with the keg tank and is used to perform a third defoaming procedure.

According to another embodiment of the present invention, a method of defoaming a viscose is proposed. The defoaming method includes the following steps. Providing a defoaming device, wherein the defoaming device comprises a large bucket, a small tub and a first exhaust pipe, the small tub communicates with the large tub, and the first exhaust pipe communicates with the small tub; a first defoaming procedure; performing a second defoaming procedure in the keg tank; and performing a third defoaming procedure in the first exhaust pipe.

In order to better understand the above and other aspects of the present invention, the preferred embodiments are described below, and in conjunction with the drawings, the detailed description is as follows:

100‧‧‧Defoaming equipment

110‧‧‧ large barrel

115‧‧‧Defoaming machine

120‧‧‧ small bucket

120a‧‧‧ entrance

120e‧‧‧ venting holes

120t‧‧‧ top wall

120w‧‧‧ side wall

120b‧‧‧ bottom wall

120e‧‧‧Exhaust port

130‧‧‧First exhaust pipe

131‧‧‧ observation tube

1311‧‧‧ Transparent window

132‧‧‧First connecting pipe

133‧‧‧Second connecting tube

140‧‧‧Second exhaust pipe

150‧‧‧ delivery tube

160‧‧‧ valve

10‧‧‧Viscos

20‧‧‧applicator

G1‧‧‧ gas

S110, S120, S130, S140‧‧ steps

FIG. 1A is a schematic view of a defoaming apparatus according to an embodiment of the invention.

Fig. 1B is an enlarged schematic view showing a portion 1B' of Fig. 1A.

FIG. 2 is a flow chart showing a method of defoaming a viscose according to an embodiment of the invention.

Fig. 1A is a schematic view showing a defoaming apparatus according to an embodiment of the present invention, and Fig. 1B is an enlarged schematic view showing a portion 1B' of Fig. 1A.

The defoaming device 100 is used to perform a defoaming process on the adhesive 10. The adhesive 10 is, for example, a pressure-sensitive adhesive which can be used for bonding a polarizing plate and a display panel. In another example, the adhesive 10 can also be a clear optical adhesive for use in other fields that can bond any two components. In one embodiment, the adhesive 10 is, for example, a pressure sensitive adhesive. An embodiment The material of the adhesive 10 may comprise, for example, (meth) acrylate, a crosslinking agent or other suitable material, wherein the (meth) acrylate is, for example, methyl (meth) acrylate or (meth) acrylate. An ester, butyl (meth)acrylate or 2-ethylhexyl (meth)acrylate, and the crosslinking agent is, for example, an epoxy crosslinking agent, an isocyanate crosslinking agent or an imide crosslinking agent. . In an embodiment, the adhesive 10 may further comprise other additives such as a decane coupling agent, an antistatic agent, and the like.

The defoaming apparatus 100 includes a large tank 110, a deaerator 115, at least one small tank 120, a first exhaust pipe 130, a second exhaust pipe 140, a transfer pipe 150, and a valve 160. The large tank 110 is used to perform a first defoaming process, the small tank 120 is used to perform a second defoaming process, and the first exhaust pipe 130 is used to perform a third defoaming process to exclude all or large of the adhesive 10 Part of the gas, which in turn reduces the negative impact of the adhesive 10 on optical quality.

In detail, the large tub 110 is used to blend the components of the adhesive 10 while performing a first defoaming procedure, wherein the first defoaming procedure is, for example, a pressurized defoaming procedure. When the glue 10 is stirred in the large tub 110, it is simultaneously pressurized to remove the gas that enters the adhesive 10 during agitation. In one embodiment, a pressurized degassing procedure can be performed by introducing a gas, such as nitrogen.

The glue 10 can enter the deaerator 115 from the vat 110. The defoaming machine 115 performs a centrifugal defoaming procedure on the adhesive 10 to remove residual gas in the adhesive 10. The glue 10 in the defoaming machine 115 can be returned to the large tank 110 to continue blending to pressurize and defoam until the glue 10 is blended, and then sent to the small tub 120. In addition, the manner in which the adhesive 10 in the defoaming machine 115 is returned to the large tank 110 can completely eliminate the inside of the pipeline. gas. In another embodiment, the defoaming machine 115 may be omitted if not required.

The tubing slot 120 communicates with the tubing slot 110 and is used to perform a second defoaming procedure. Since the pressure applied to the adhesive 10 by the large tank 110 is large, the adhesive 10 is easily mixed with gas during the process of entering the small tub 120. However, the second defoaming process is performed through the keg 120 to remove the residual gas of the adhesive 10. The second defoaming procedure is, for example, a static defoaming procedure. In one embodiment, after the adhesive 10 in the keg 120 is allowed to stand for a period of time, for example, half an hour, the residual gas in the adhesive 10 is removed from the adhesive 10. In another embodiment, the glue 10 can be allowed to stand in the keg 120 for less than half an hour or longer than half an hour.

The ratio of the volume of each keg tank 120 to the volume of the ladle tank 110 may be between 3% and 7% to exclude residual gas in the viscose 10. In another embodiment, the ratio of the volume of the keg tank 120 to the volume of the keg tank 110 may be less than 3% or greater than 7%. In this embodiment, the number of the small tubs 120 is four, but less than four or more than four. The embodiment of the present invention does not limit the volume and/or the number of the kegs 120 as long as the residual gas in the adhesive 10 can be effectively excluded.

Further, the small tub 120 has an inlet 120a that communicates with the large tub 110. The conveying pipe 150 communicates with the deaerator 115 and the inlet 120a of the keg tank 120, so that the glue 10 in the defoaming machine 115 can pass through the conveying pipe 150 into the keg tank 120. In another embodiment, if the defoaming machine 115 is omitted, the conveying pipe 150 can communicate with the large tank 110 and the inlet 120a of the small tub 120.

The inlet 120a of the small tub 120 is located at a lower portion of the small tub 120, such as the side wall 120w of the small tub 120 adjacent to the bottom wall 120b. In one embodiment, the inlet 120a As close as possible to the bottom wall 120b. Since the inlet 120a is located at the lower portion of the small tub 120, the height between the inlet 120a and the bottom wall 120b can be lowered to prevent excessive mixing of the gas during the flow of the adhesive 10 from the inlet 120a to the bottom wall 120b. In another embodiment, the inlet 120a can be located at the bottom wall 120b of the keg tank 120.

Further, each of the small tubs 120 has an exhaust port 120e. The exhaust port 120e is located at an upper portion of the tub unit 120, such as a side wall 120w of the tub unit 120 near the top wall 120t. In the small tub 120, the gas G1 which is detached from the adhesive 10 floats upward due to the small density, and is discharged outside the small tub 120 through the exhaust port 120e. In another embodiment, even if the vent hole 120e is omitted, the gas G1 will be detached from the adhesive 10 after standing.

In addition, the second exhaust pipe 140 can communicate with the exhaust port 120e and an external air extracting device (not shown). The external air extracting means is, for example, a fan or a vacuum source, and accelerates the discharge of the gas G1 in the small tub 120 from the outside of the small tub 120. In another embodiment, the vent 120e can be located at the top wall 120t of the keg tank 120.

The first exhaust pipe 130 communicates with the keg tank 120 and is used to perform a third defoaming process. That is to say, if the adhesive 10 in the small tub 120 has residual gas, it can be removed through the first exhaust pipe 130.

As shown in FIG. 1B, the first exhaust pipe 130 includes an observation pipe 131, a first communication pipe 132, and a second communication pipe 133. The first communication tube 132 communicates with the observation tube 131 and the small tub 120. The observation tube 131, the first communication tube 132, and the second communication tube 133 are substantially T-shaped. For example, the observation tube 131 is connected substantially in parallel with the second communication tube 133, and the first communication tube 132 is substantially perpendicular to the observation tube 131 and the second communication tube 133.

The second communication tube 133 is connected to the observation tube 131 for feeding the adhesive 10 in the observation tube 131 to an applicator 20 (applicator 20 is shown in FIG. 1A). The applicator 20 can apply the vented adhesive 10 to an optical component (not shown) such as a release film or a polarizing plate. As shown in FIG. 1A, the valve 160 is provided in the second communication pipe 133. Before the adhesive 10 in the sight tube 131 completes the exhaust, the valve 160 is closed, preventing the adhesive 10 that has not completed the exhaust from flowing to the applicator 20.

During the process from the small tub 120 to the viewing tube 131, the adhesive 10 passes through at least one pipeline (such as the first communicating tube 132), so that the air in the pipeline may enter the adhesive 10. However, since the adhesive 10 of the present embodiment is allowed to stand in the observation tube 131 before being sent to the applicator 20, the residual gas in the adhesive 10 can be released from the adhesive 10. In one embodiment, the glue 10 can be allowed to stand in the sight tube 131 for about half an hour, but it can also be seen that the exhaust condition is greater than or less than half an hour.

The observation tube 131 includes a transparent window 1311 that allows the adhesive 10 located in the observation tube 131 to be exposed from the transparent window 1311 to facilitate observation of the exhaust state of the adhesive 10 in the first exhaust pipe 130. By observing the bubble condition of the glue 10 in the transparent window 1311, it can be determined whether the valve 160 is opened to allow the adhesive 10 to be delivered to the applicator 20. For example, if the adhesive 10 in the transparent window 1311 no longer emits bubbles or the amount of bubbles emerging is insufficient to affect the quality of the adhesive 10, indicating that the exhaust is substantially completed, the valve 160 can be opened to allow the adhesive 10 to be delivered to Applicator 20.

As shown in FIG. 1A, the adhesive 10 in the sight tube 131 can also be selectively returned to the large tank 110 for pressure defoaming to accelerate the gas from the adhesive 10.

2 is a flow chart showing a method of defoaming a viscose according to an embodiment of the present invention. Cheng Tu. In step S110, the defoaming apparatus 100 as shown in Fig. 1A is provided. In step S120, the first defoaming process is performed in the vat 110, for example, a pressurized defoaming process. In step S130, the second defoaming process is performed in the keg tank 120, for example, a static defoaming process. In step S140, a third defoaming process is performed with the first exhaust pipe 130, for example, a static defoaming process.

The residual gas in the adhesive 10 is less and less after a plurality of defoaming procedures. The first defoaming procedure, the second defoaming procedure, and the third defoaming procedure are performed sequentially. In one embodiment, the amount of defoaming is from large to small in order: first defoaming procedure > second defoaming procedure > third defoaming procedure; that is, removing more bubbles in the first defoaming procedure The subsequent defoaming procedure can remove residual bubbles or tiny bubbles that are difficult to remove.

As shown in the following Table 1, the first embodiment is the result of the defoaming of the adhesive 10 through the defoaming device 100, and the comparative example 1 is the adhesive 10 passing through the large tank 110 and the first exhaust pipe 130 (not through the keg As a result of the defoaming of the tank 120), Comparative Example 2 is the result of defoaming of the adhesive 10 through the large tank 110 and the small tank 120 (not passing through the first exhaust pipe 130), and the comparative example 3 is only passed through the large tank. 110 does not pass the defoaming result of the keg tank 120 and the first exhaust pipe 130.

As can be seen from Table 1, after the defoaming of the viscose 10 using the defoaming apparatus 100 of Example 1, the number of bubbles is smaller than that of Comparative Examples 1 to 3, whether it is an automatic inspection machine, human visual inspection or optical inspection, and the optical quality is also Better than Comparative Examples 1 to 3.

In summary, the defoaming apparatus 100 of the embodiment of the present invention can perform at least three defoaming procedures on the adhesive 10 to exclude most or all of the gas in the adhesive 10, and ensure that the adhesive 10 provided to the applicator 20 has A certain quality, such as good adhesion and / or optical properties (such as light transmittance). Since the defoaming apparatus 100 of the embodiment of the present invention performs at least three defoaming procedures on the adhesive 10, even if the viscosity of the adhesive 10 is high, the gas in the adhesive 10 can be sufficiently excluded. In one embodiment, the defoaming device 100 can remove the adhesive 10 by more than 90%, such as at least 99% of the gas.

In conclusion, the present invention has been disclosed in the above preferred embodiments, and is not intended to limit the present invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

10‧‧‧Viscos

20‧‧‧applicator

100‧‧‧Defoaming equipment

110‧‧‧ large barrel

115‧‧‧Defoaming machine

120‧‧‧ small bucket

120a‧‧‧ entrance

120t‧‧‧ top wall

120w‧‧‧ side wall

120b‧‧‧ bottom wall

120e‧‧‧Exhaust port

130‧‧‧First exhaust pipe

140‧‧‧Second exhaust pipe

150‧‧‧ delivery tube

160‧‧‧ valve

G1‧‧‧ gas

Claims (10)

A defoaming device for performing a defoaming process on a glue, comprising: a large barrel for performing a first defoaming process; a small tub, communicating with the large tank, and for performing a second take off a bubble program; and a first exhaust pipe that communicates with the keg tank and is used to perform a third defoaming process. The defoaming device of claim 1, wherein the ratio of the volume of the keg to the volume of the keg is between 3% and 7%. The defoaming device of claim 1, wherein the keg tank has an inlet communicating with the large tub, the inlet being located at a lower portion of the keg. The defoaming device of claim 1, wherein the keg is provided with an exhaust port located at an upper portion of the keg. The defoaming device of claim 1, wherein the first exhaust pipe comprises: a sight pipe; and a first communication pipe connecting the observation pipe and the keg groove and connected substantially perpendicularly The observation tube. The defoaming device of claim 5, wherein the first exhaust pipe further comprises: a second communication pipe connected to the observation tube and an applicator. The defoaming device of claim 5, wherein the viewing tube comprises a transparent window for exposing the adhesive located in the viewing tube from the transparent window. The defoaming device of claim 1, wherein the first defoaming procedure is a pressurized defoaming procedure, the second defoaming procedure is a static defoaming procedure, and the third defoaming procedure is static Set the defoaming procedure. A method for defoaming a viscose, comprising: providing a defoaming device, wherein the defoaming device comprises a large barrel, a small tub and a first exhaust pipe, the keg is connected to the large tank, and the An exhaust pipe is connected to the keg tank; a first defoaming process is performed in the keg tank; a second defoaming process is performed in the keg tank; and a third defoaming process is performed by the first exhaust pipe . The defoaming method according to claim 9, wherein the first defoaming procedure, the second defoaming procedure, and the third defoaming procedure are sequentially performed.