CN110466813B - Filling method of single-component sealant - Google Patents
Filling method of single-component sealant Download PDFInfo
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- CN110466813B CN110466813B CN201910773146.2A CN201910773146A CN110466813B CN 110466813 B CN110466813 B CN 110466813B CN 201910773146 A CN201910773146 A CN 201910773146A CN 110466813 B CN110466813 B CN 110466813B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
- B65B3/04—Methods of, or means for, filling the material into the containers or receptacles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
- B65B31/02—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas
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Abstract
The invention provides a filling method of a single-component sealant, which comprises the following steps: a) sealing the single-component sealant to be filled, vacuumizing, and introducing nitrogen to balance the single-component sealant to be filled with external air pressure; b) keeping the balance between the single-component sealant to be filled and the external air pressure, pressing a pressure plate downwards, and discharging to obtain the filled single-component sealant. Compared with the prior art, the filling method provided by the invention adopts specific process steps, realizes nitrogen protection, stabilizes the whole filling process under specific conditions, and ensures that the quality of the single-component sealant is not influenced while air is prevented from entering the colloid. Experimental results show that the filled single-component sealant obtained by the filling method provided by the invention has a good filling effect and is free of gel.
Description
Technical Field
The invention relates to the technical field of sealant production, in particular to a filling method of a single-component sealant.
Background
The sealant is used for filling gaps (holes, joints, seams and the like) and has two functions of bonding and sealing. The polyurethane sealant, the silicone sealant and the polysulfide sealant constitute three major varieties of the prior high-grade sealants, and are widely used for sealing buildings, transportation, electronic instruments and parts.
The filling is one of important links in the production of the sealant, and the filling of the single-component sealant mainly refers to the filling of the single-component organosilicon sealant and the filling of the single-component polyurethane sealant. At present, the conventional method for filling the single-component sealant is to directly fill the sealant by pressing a plate.
However, along with the filling, the pressure disk pushes down, and the pressure disk and the gluey plane form the cavity, and have the air admission in the cavity, and partial air can get into the colloid, because single component organosilicon sealant and single component polyurethane sealant all belong to the moisture curing mechanism, steam in the air can carry out cross-linking reaction with gluing, forms gel or skinning for the gel or skinning that the air admission part for influence the quality of gluing.
Disclosure of Invention
In view of this, the invention aims to provide a method for filling a single-component sealant, which can prevent air from entering a colloid and ensure that the quality of the single-component sealant is not affected.
The invention provides a filling method of a single-component sealant, which comprises the following steps:
a) sealing the single-component sealant to be filled, vacuumizing, and introducing nitrogen to balance the single-component sealant to be filled with external air pressure;
b) keeping the balance between the single-component sealant to be filled and the external air pressure, pressing a pressure plate downwards, and discharging to obtain the filled single-component sealant.
Preferably, the one-component sealant to be filled in the step a) is selected from filling of one-component organosilicon sealant or one-component polyurethane sealant.
Preferably, the temperature of the single-component sealant to be filled in the step a) is 45-65 ℃.
Preferably, the sealing process in step a) is specifically:
and pushing the single-component sealant to be filled into a press, and arranging a vacuum cover at the top of the press for sealing.
Preferably, the vacuum cover is provided with a vacuum pumping valve and a nitrogen valve.
Preferably, the vacuum degree of the vacuum pumping in the step a) is-0.1 MPa to-0.06 MPa.
Preferably, the pressure of the pressing plate in the step b) is 10MPa to 25MPa, the pressing speed is 5cm/s to 15cm/s, and the temperature is 20 ℃ to 30 ℃.
The invention provides a filling method of a single-component sealant, which comprises the following steps: a) sealing the single-component sealant to be filled, vacuumizing, and introducing nitrogen to balance the single-component sealant to be filled with external air pressure; b) keeping the balance between the single-component sealant to be filled and the external air pressure, pressing a pressure plate downwards, and discharging to obtain the filled single-component sealant. Compared with the prior art, the filling method provided by the invention adopts specific process steps, realizes nitrogen protection, stabilizes the whole filling process under specific conditions, and ensures that the quality of the single-component sealant is not influenced while air is prevented from entering the colloid. Experimental results show that the filled single-component sealant obtained by the filling method provided by the invention has a good filling effect and is free of gel.
Meanwhile, the filling method provided by the invention is simple, small in improvement on the original equipment, easy to implement, suitable for large-scale industrial production and wide in application prospect.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus of a filling method according to embodiment 1 of the present invention;
fig. 2 is a diagram of an actual effect of the filled single-component sealant obtained by the filling method provided in embodiment 1 of the present invention;
fig. 3 is a physical diagram of the filled single-component sealant obtained by the filling method provided in comparative example 1.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a filling method of a single-component sealant, which comprises the following steps:
a) sealing the single-component sealant to be filled, vacuumizing, and introducing nitrogen to balance the single-component sealant to be filled with external air pressure;
b) keeping the balance between the single-component sealant to be filled and the external air pressure, pressing a pressure plate downwards, and discharging to obtain the filled single-component sealant.
The method comprises the steps of firstly sealing the single-component sealant to be filled, vacuumizing, and then introducing nitrogen to balance the single-component sealant to be filled with the external air pressure. In the present invention, the one-component sealant to be filled is preferably selected from the group consisting of a one-component silicone sealant for filling or a one-component polyurethane sealant, more preferably a one-component silicone sealant. In a preferred embodiment of the invention, the single-component sealant is a single-component silicone sealant, and comprises the following components:
30-50 wt% of hydroxyl-terminated polydimethylsiloxane;
5-15 wt% of dimethyl silicone oil;
40-55 wt% of nano calcium carbonate;
2-10 wt% of fumed silica;
3-6 wt% of cross-linking agent (methyl trimethoxy silane);
0.3 wt% -1.2 wt% of coupling agent (KH-560, gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane);
1.0 wt% -3.0 wt% of catalyst (tetrabutyl titanate).
In the invention, the temperature of the single-component sealant to be filled is preferably 45-65 ℃, and more preferably 50-60 ℃. In the invention, the single-component sealant to be filled is preferably discharged by a planetary machine and then placed in a finished product kettle for filling; the single-component sealant to be filled can generate skinning gel when contacting air, the drying time is about 5 minutes at the temperature, the time for discharging the sealant from a cylinder pulling of a planetary machine into a packaging barrel is about 1.5 to 2 hours, and the gel can be generated in the process of pressing down the colloid around the cylinder wall due to contacting air in the conventional filling process.
In the present invention, the sealing process is preferably specifically:
and pushing the single-component sealant to be filled into a press, and arranging a vacuum cover at the top of the press for sealing.
The press is not particularly limited in the present invention, and a press with a platen known to those skilled in the art may be used. In the present invention, the vacuum hood is preferably provided with a vacuum valve and a nitrogen valve; wherein the vacuum-pumping valve is used for pumping vacuum; the nitrogen valve is used for inputting nitrogen.
In the present invention, the degree of vacuum of the evacuation is preferably-0.1 MPa to-0.06 MPa, and more preferably-0.08 MPa. After the vacuum degree reaches the parameters, the invention stops vacuumizing, opens the nitrogen valve and fills nitrogen to vent.
In the invention, the specific parameters of the introduced nitrogen are to balance the single-component sealant to be filled with the external air pressure; on the basis, the single-component sealant to be filled is kept balanced with the external air pressure, the pressing plate is pressed downwards, and the filled single-component sealant is obtained after discharging.
In the invention, the pressure of the pressing disc is preferably 10MPa to 25MPa, and more preferably 15MPa to 20 MPa; the pressing speed of the pressing disc is preferably 5 cm/s-15 cm/s, and more preferably 10 cm/s; the pressing temperature of the pressing plate is preferably 20-30 ℃.
And (3) keeping the space in the kettle in a nitrogen state of 1 atmosphere all the time in the discharging process, and completing the filling process to obtain the filled single-component sealant.
The filling method provided by the invention adopts specific process steps, realizes the protection of nitrogen (the nitrogen enters the colloid and cannot influence the colloid amount), stabilizes the whole filling process under specific conditions, and ensures that the quality of the single-component sealant is not influenced while avoiding the air from entering the colloid. Experimental results show that the filled single-component sealant obtained by the filling method provided by the invention has a good filling effect and is free of gel. Meanwhile, the filling method provided by the invention is simple, small in improvement on the original equipment, easy to implement, suitable for large-scale industrial production and wide in application prospect.
The invention provides a filling method of a single-component sealant, which comprises the following steps: a) sealing the single-component sealant to be filled, vacuumizing, and introducing nitrogen to balance the single-component sealant to be filled with external air pressure; b) keeping the balance between the single-component sealant to be filled and the external air pressure, pressing a pressure plate downwards, and discharging to obtain the filled single-component sealant. Compared with the prior art, the filling method provided by the invention adopts specific process steps, realizes nitrogen protection, stabilizes the whole filling process under specific conditions, and ensures that the quality of the single-component sealant is not influenced while air is prevented from entering the colloid. Experimental results show that the filled single-component sealant obtained by the filling method provided by the invention has a good filling effect and is free of gel.
Meanwhile, the filling method provided by the invention is simple, small in improvement on the original equipment, easy to implement, suitable for large-scale industrial production and wide in application prospect.
To further illustrate the present invention, the following examples are provided for illustration. The single-component sealant used in the following embodiments of the invention is a single-component organosilicon sealant, which comprises the following components:
35 wt% of hydroxyl-terminated polydimethylsiloxane;
10 wt% of dimethyl silicone oil;
45 wt% of nano calcium carbonate;
fumed silica 3 wt%;
4 wt% of a crosslinking agent (methyltrimethoxysilane);
0.5 wt% of coupling agent (KH-560, gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane);
catalyst (tetrabutyl titanate) 2.5 wt%.
Example 1
Pushing the single-component sealant (50-60 ℃) to be filled in a finished product kettle into a press, arranging a vacuum cover with a vacuum pumping valve and a nitrogen valve at the top of the press for sealing, then opening the vacuum pumping valve, stopping pumping vacuum when the pressure gauge value is-0.08 MPa, opening the nitrogen valve to fill nitrogen and exhaust, pulling out a plug at the bottom of the kettle to press a pressure plate at the pressure of 15-20 MPa at the pressing speed of 10cm/s at the temperature of 20-30 ℃ when the pressure gauge value is restored to 0MPa, and discharging; and (3) keeping the space in the kettle in a nitrogen state of 1 atmosphere all the time in the discharging process, and completing the filling process to obtain the filled single-component sealant.
Fig. 1 is a schematic structural diagram of an apparatus of a filling method according to embodiment 1 of the present invention.
A physical effect diagram of the filled single-component sealant obtained by the filling method provided by the embodiment 1 of the invention is shown in fig. 2; as can be seen from fig. 2, the filled single-component sealant obtained by the filling method provided in embodiment 1 of the present invention has a good filling effect and is free of gel.
Comparative example 1
Pushing the single-component sealant (50-60 ℃) to be filled in the finished product kettle into a press, pulling out a plug at the bottom of the kettle, pressing down a pressure plate at the pressure of 15-20 MPa and the pressing speed of 10cm/s at the temperature of 20-30 ℃, and discharging; and finishing the filling process to obtain the filled single-component sealant.
The physical effect diagram of the filled single-component sealant obtained by the filling method provided in the comparative example 1 is shown in fig. 3; as can be seen from fig. 3, the filled one-component sealant obtained by the filling method provided in comparative example 1 has poor filling effect, has gel, and also has crust.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. A filling method of a single-component sealant comprises the following steps:
a) sealing the single-component sealant to be filled, vacuumizing, and introducing nitrogen to balance the single-component sealant to be filled with external air pressure; the sealing process specifically comprises the following steps:
pushing the single-component sealant to be filled into a press, and arranging a vacuum cover at the top of the press for sealing; the vacuum cover is provided with a vacuum pumping valve and a nitrogen valve; the single-component sealant to be filled is a single-component organosilicon sealant and comprises the following components:
35 wt% of hydroxyl-terminated polydimethylsiloxane;
10 wt% of dimethyl silicone oil;
45 wt% of nano calcium carbonate;
fumed silica 3 wt%;
4 wt% of methyltrimethoxysilane;
0.5 wt% of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane;
2.5 wt% of tetrabutyl titanate;
the temperature of the single-component sealant to be filled is 45-65 ℃;
b) keeping the balance between the single-component sealant to be filled and the external air pressure, pressing a pressing plate downwards, and discharging to obtain the filled single-component sealant; the pressing pressure of the pressure plate is 10 MPa-25 MPa, the pressing speed is 5 cm/s-15 cm/s, and the temperature is 20-30 ℃.
2. The filling method according to claim 1, wherein the degree of vacuum of the vacuum in step a) is-0.1 MPa to-0.06 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910773146.2A CN110466813B (en) | 2019-08-21 | 2019-08-21 | Filling method of single-component sealant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910773146.2A CN110466813B (en) | 2019-08-21 | 2019-08-21 | Filling method of single-component sealant |
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| CN110466813A CN110466813A (en) | 2019-11-19 |
| CN110466813B true CN110466813B (en) | 2020-10-23 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2851241A1 (en) * | 2003-02-13 | 2004-08-20 | Rhodia Chimie Sa | A method of emptying a flexible or big bag container containing a viscous polymer product such as mastic by placing in an cylindrical emptying tank and applying pressure to the top by means of a piston |
| CN1555911A (en) * | 2003-12-31 | 2004-12-22 | 广州市白云化工实业有限公司 | Buffer reaction storage tank |
| CN105562302A (en) * | 2015-12-22 | 2016-05-11 | 广州市白云化工实业有限公司 | Anti-skinning device of sealant storage tank |
| CN206219174U (en) * | 2016-11-24 | 2017-06-06 | 上海保立佳新材料有限公司 | A kind of resilience high is not ftractureed fluid sealant filling apparatus |
| CN208484855U (en) * | 2018-05-07 | 2019-02-12 | 东莞圣堡达实业投资有限公司 | A kind of fully-automatic sealing glue flexible package bottler |
-
2019
- 2019-08-21 CN CN201910773146.2A patent/CN110466813B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2851241A1 (en) * | 2003-02-13 | 2004-08-20 | Rhodia Chimie Sa | A method of emptying a flexible or big bag container containing a viscous polymer product such as mastic by placing in an cylindrical emptying tank and applying pressure to the top by means of a piston |
| CN1555911A (en) * | 2003-12-31 | 2004-12-22 | 广州市白云化工实业有限公司 | Buffer reaction storage tank |
| CN105562302A (en) * | 2015-12-22 | 2016-05-11 | 广州市白云化工实业有限公司 | Anti-skinning device of sealant storage tank |
| CN206219174U (en) * | 2016-11-24 | 2017-06-06 | 上海保立佳新材料有限公司 | A kind of resilience high is not ftractureed fluid sealant filling apparatus |
| CN208484855U (en) * | 2018-05-07 | 2019-02-12 | 东莞圣堡达实业投资有限公司 | A kind of fully-automatic sealing glue flexible package bottler |
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