Polyurethane foaming application method

Abstract

TITLE: POLYURETHANE FOAMING APPLICATION METHOD A polyurethane foaming application method is applicable to large scale filling in 5 civil and architecture engineering and constructions, where polyol and isocyanate are mixed at a designated ratio to form a mixture A, and air is introduced and subjected to pressure adjustment to carry out a second mixing to obtain a mixture B, wherein foaming density is controlled through being in inverse proportion to pressure of the air, generation of toxic substances are reduced while stable foaming, for finally pouring into 10 desired locations. In another way of implementation, a third mixing step is added to carry out in a pressure release chamber, where the mixture B is first formed through mixing in the static agitator, and then air is introduced into the pressure release chamber to obtain a mixture C. In this stage, the air mixing ratio can be adjusted more widely, and the rapid foaming rate can be controlled more stably. 20 25 20 45 65 18 J un 2 02 5 2 0 2 5 2 0 4 5 6 5 1 8 J u n 2 0 2 5 1 3 A B S T R A C T O F T H E D I S C L O S U R E T I T L E : P O L Y U R E T H A N E F O A M I N G A P P L I C A T I O N M E T H O D 2 0 2 5 2 0 4 5 6 5 1 8 J u n 2 0 2 5 1 3 A B S T R A C T O F T H E D I S C L O S U R E T I T L E : P O L Y U R E T H A N E F O A M I N G A P P L I C A T I O N M E T H O D 10 20 60 201 101 601 602 30 70 80 40 71 first material Polyol second material isocyanate first pump second pump air air compressor first gas guide pipe static agitator mixture A mixture B polyurethan foaming completed material mixing chamber air mixing chamber FIG. 1 1 / 5 101 80 air 10 first material first Polyol pump 70 20 second material air second isocyanate compressor pump 201 71 first gas 60 guide pipe static agitator 40 polyurethan 30 mixture mixture foaming A B completed 601 material mixing air mixing 602 chamber chamber FIG. 1 1 / 5 20 25 20 45 65 18 J un 2 02 5 J u n 2 0 2 5 2 0 2 5 2 0 4 5 6 5 1 8 m i x t u r e S F I G . 1 J u n 2 0 2 5 2 0 2 5 2 0 4 5 6 5 1 8 m i x t u r e S F I G . 1

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a polyurethane foaming application method, and more particularly to one that utilizes the material properties of polyurethane to form a barrier structure through chemical reactions and applies adjustment of reaction materials to mix with air at different pressures, so as to shorten the reaction time and more easily control the structural density for further applications relating to civil and architecture engineering and construction. DESCRIPTION OF THE PRIOR ART Polyurethane foaming materials have been widely used in various industries, such as architecture construction, manufacturing, and other industries due to their excellent physical and chemical characteristics, such as good dynamical properties, wear resistance, weather resistance, chemical resistance, and electrical insulation. They include waterproof materials, thermal insulation materials, coatings, sealants, and the likes. In the field of civil engineering, polyurethane foaming technology is also used in projects such as ground improvement and gap filling. However, the existing polyurethane foaming construction technology still has the following shortcomings when applied to civil engineering projects such as large-scale ground filling: (1) deficiency concerning uniformity of mixture: Traditional ways of mixing polyurethane foam, such as simple mechanical stirring or single injection mixing, may lead to uneven material mixing, affecting the uniformity of foaming pores and overall structural strength, and such a problem is even more significant especially when applied over a large area. Uneven mixing will lead to inhomogeneous density of the foamed object, which in turn affects its load-bearing capacity and stability. 2025204565   18 Jun 2025 2 (2) Difficulty in density control: The traditional ways are hard to accurately control the density after foaming. Too high a density will increase material costs, while too low a density may not achieve the expected filling results, such as insufficient support or easy collapse. For applications such as ground filling, accurate density control is crucial. 5       (3) Difficulty in control of foaming reaction: The polyurethane foaming reaction is greatly affected by environmental factors (such as temperature and humidity). The traditional ways are difficult to effectively control the speed and uniformity of the foaming reaction, and especially in large areas or complex stratum environments, it may easily lead to problems such as uneven foaming and local collapse. 10 2025204565   18 Jun 2025 3 SUMMARY OF THE INVENTION An objective of the present invention is to provide a polyurethane foaming application method, which is not used for thermal insulation and sound isolation of the interior of a building, and is instead focusing on applications to large scale constructions environment in civil and architecture engineering, such as applications for filling the lost volume of the ground under the road. Mixing is mainly carried out by controlling air in combination with a measure of stepwise adjustment of pressure in order to improve the deficiency of the prior known technologies, improve the efficiency and performance of chemical reactions, and also achieve control in a better way. To improve the deficiency of the prior known technologies, the polyurethane foaming application method according to the present invention comprises: placing a first material in a first pump and placing a second material in a second pump so as to be transported by the first pump and the second pump to a material mixing chamber inside a static agitator, so that the static agitator carries out evenly mixing the first material and the second material to obtain a mixture A; connecting an air compressor through a first gas guide pipe with the static agitator, and drawing and feeding air outside the static agitator according to a desired amount to an air mixing chamber inside the static agitator by means of the air compressor; subsequently subjecting the mixture A in combination with the air to second mixing to obtain a mixture B, wherein, to this point, the mixture B so obtained is ready for pouring into desired locations to implement foaming applications. The mixture B so obtained in the previous step can be further outputted to a pressure release chamber of the static agitator, together with operating the air compressor to feed air by a desired amount to a second gas guide pipe connecting with the pressure release chamber so as to obtain a mixture C through third mixing, and the mixture C is then poured to desired locations to implement foaming applications until 2025204565   18 Jun 2025 4 completion, wherein compared to the mixture B, the mixture C so obtained can have better control with respect to efficiency and performance of chemical reactions. 2025204565   18 Jun 2025 5 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing components of the present invention. FIG. 2 is a flow chart showing a polyurethane foaming application method of the present invention. 5 FIG. 3 is a schematic view showing components of another embodiment of the present invention. FIG. 4 is a schematic view showing hardware components of another embodiment of the present invention. FIG. 5 is a flow chart showing another embodiment of the present invention. 10 2025204565   18 Jun 2025 6 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Generally, according to the present invention, the best feasible embodiment is descried in detail with reference to the attached drawings in order to enhance the understanding of the present invention. Referring to FIGS. 1-2, the present invention provides a polyurethane foaming application method, which is mainly focusing on applications to large scale constructions environment in civil and architecture engineering, such as applications for filling the lost volume of the ground under the road. The polyurethane foaming application method comprises the following Steps S1-S4. Step S1, firstly, placing a first material (10) in a first pump (101), wherein the first material (10) is polyol, and placing a second material (20) in a second pump (201), wherein the second material (20) is isocyanate (such as methylene diphenyl diisocyanate (MDI)), the ratio between the first material (10) and the second material (20) being 1:1, so as to be transported by the first pump (101) and the second pump (201) to a material mixing chamber (601) of a static agitator (60), wherein the static agitator (60) is operated for 0.2 seconds to evenly mix the first material (10) and the second material (20) to obtain a mixture A (30); Step S2, connecting an air compressor (70) through a first gas guide pipe (71) with an air mixing chamber (602) inside the static agitator (60), and drawing in air (80) outside the static agitator (60) by a desired amount according to an operation pressure of the air compressor (70) set at 0-10kg / cm2 to be fed into the air mixing chamber (602) inside the static agitator (60); Step S3, subsequently carrying out second mixing of the mixture A (30) in combination with the air (80) subjected to adjustment, as being selected, to be 4-10kg / cm2, through the static agitator (60) being operated for 0.1 seconds to obtain a mixture B (40), wherein the pressure of the air (80) is inversely proportional to the foaming density of the mixture B (40), and specifically speaking: when the pressure of the air (80) is large, the polyurethane foaming density is low, and the polyurethane 2025204565   18 Jun 2025 7 foaming volume is large in this case, and when the pressure of the air (80) is small, the polyurethane foaming density is high, and the polyurethane foaming volume is small in this case, so that the foaming status of polyurethane can be effectively adjusted through the fed amount of air, and thus achieving the purposes of effectively improving the generation of toxic substances and controlling stability of foaming to thereby get applicable to more diversified application sites and environments; and Step S4, pouring the mixture B (40) into desired locations to implement foaming applications until the foaming reaction is completed. In summary, the polyurethane foaming application method according to the present invention feeds the first material (10) and the second material (20) by means of the first pump (101) and the second pump (201) respectively to the material mixing chamber (601) of the static agitator (60) for mixing and stirring in order to obtain the mixture A (30), and applies the air compressor (70) in combination with the first gas guide pipe (71) to draw and guide the air (80) from the outside to the air mixing chamber (602) inside the static agitator (60), so that the mixture A (30) in combination with the air (80) is subjected to second mixing in the air mixing chamber (602) inside the static agitator (60) so as to obtain the mixture B (40), and pours the mixture B (40) into a desired location to implement foaming applications until completion. Since the generation of toxic substances is further improved by mixing the air (80), and the pressure and seconds of the air (80) mixing are utilized, the foaming can be effectively and stably controlled. Referring to FIGS. 3-5, another embodiment of the present invention is provided, and for the steps thereof, Step S1”, firstly, placing a first material (10) in a first pump (101), wherein the first material (10) is polyol, and placing a second material (20) in a second pump (201), wherein the second material (20) is isocyanate, wherein the ratio between the first material (10) and the second material (20) is 1:1, so that the first material (10) and the second material (20) are transported by the first pump (101) and 2025204565   18 Jun 2025 8 the second pump (201) to a material mixing chamber (601) inside a static agitator (60), wherein the static agitator (60) is operated for 0.2 seconds to evenly mix the first material (10) and the second material (20) for 0.2 seconds to obtain a mixture A (30); Step S2”, connecting an air compressor (70) through a first gas guide pipe (71) with an air mixing chamber (602) inside the static agitator (60), and drawing in air (80) outside the static agitator (60) by a desired amount to feed into the air mixing chamber (602) of the static agitator (60), and subsequently, carrying out mixing of the mixture A (30) with a proper amount of the air (80) for 0.1 seconds to obtain a mixture B (40), wherein the pressure of the air (80) is adjusted between 4 to 10Kg / cm2, and the density of the mixture B (40) is 300 to 500Kg / M3, wherein since the static agitator (60) is an enclosed space, the amount of the air (80) that can be added is also limited; Step S3”, then outputting the mixture B (40) to a pressure release chamber (603) of the static agitator (60), in combination with operating the air compressor (70) to feed the air (80), according to a desired amount, into a second gas guide pipe (72) connected to the pressure release chamber (603), wherein the space changes from being a closed status to being open and the number of seconds for mixing the air (80) can be adjusted within a wider range, so as to further obtain a mixture C (50) through third mixing, wherein the pressure of the air (80) is adjusted between 6 to 8Kg / cm2, and the density of the mixture B (40) is 65 to 200Kg / M3; and Step S4”, finally, pouring the mixture C (50) into desired locations to implement foaming applications until completion. In summary, the polyurethane foaming application method according to the present invention feeds the first material (10) and the second material (20) by means of the first pump (101) and the second pump (201) respectively to the material mixing chamber (601) of the static agitator (60) for mixing and stirring in order to obtain the mixture A (30), and applies the air compressor (70) in combination with the first gas guide pipe (71) to adjust outside air (80) to a pressure of 4 to 10Kg / cm2 to be then guided to the air 2025204565   18 Jun 2025 9 mixing chamber e (602) inside the static agitator (60) for carrying out second mixing so as to obtain the mixture B (40), and then outputs the mixture B (40) to the pressure release chamber (603) of the static agitator (60), in combination with operating the air compressor (70) to adjust the air (80) to a pressure of 6 to 8Kg / cm2 to be guided 5 through the second gas guide pipe (72) to the pressure release chamber (603), so as to carry out third mixing to obtain the mixture C (50), wherein, at this moment, the mixture C (50) can achieve the purposes of stably and fast foaming, and finally pours the mixture C (50) into a desired locations to implement foaming applications until completion. Compared with the previous primary embodiment, the efficiency and 10 performance of the chemical reactions in the latter can be better controlled.

Claims

2025204565   18 Jun 202510I CLAIM:

1. A polyurethane foaming application method, comprising the following steps: placing a first material (10) in a first pump (101) and placing a second material (20) in a second pump (201), and connecting the first pump (101) and the second pump (201) with a material mixing chamber (601) inside a static agitator (60) to carry out mixing of the first material (10) and the second material (20) for 0.2 seconds to obtain a mixture A (30); connecting an air compressor (70) through a first gas guide pipe (71) with an air mixing chamber (602) inside the static agitator (60), and feeding air (80) outside the static agitator (60) according to a desired amount into the air mixing chamber (602) of the static agitator (60); subsequently subjecting the mixture A (30) in combination with a proper amount of the air (80) to a second mixing to obtain a mixture B (40), and pouring the mixture B (40) into a desired locations to implement foaming applications until completion.

2. The polyurethane foaming application method according to claim 1, wherein the mixture B (40) is obtained by subjecting the mixture A (30) in combination with the passing air (80) to mixing for 0.1 seconds.

3. The polyurethane foaming application method according to claim 1, wherein density of the mixture B (40) is mainly adjusted through the air (80) of 4 to 10kg / cm2, and pressure of the air (80) is inversely proportional to foaming density of the mixture B (40).

4. A polyurethane foaming application method, comprising the following steps: placing a first material (10) in a first pump (101) and placing a second material (20) in a second pump (201), and connecting the first pump (101) and the second pump (201) with a material mixing chamber (601) inside a static agitator (60) to carry out mixing of the first material (10) and the second material (20) to obtain a mixture A (30); connecting an air compressor (70)2025204565   18 Jun 202511through a first gas guide pipe (71) with an air mixing chamber (602) inside the static agitator (60), and feeding air (80) outside the static agitator (60) according to a desired amount into the air mixing chamber (602) of the static agitator (60), and subsequently subjecting the mixture A (30) in combination with a proper amount of the air (80) to a second mixing to obtain a mixture B (40); and then outputting the mixture B (40) to a pressure release chamber (603) of the static agitator (60), in combination with operating the air compressor (70) to feed the air (80) by a desired amount into a second gas guide pipe (72) connecting with the pressure release chamber (603) to further carry out a third mixing to obtain a mixture C (50), and finally, pouring the mixture C (50) into desired locations to implement foaming applications until completion.

5. The polyurethane foaming application method according to claim 4, wherein the mixture A (30) is obtained by carrying out mixing of the first material (10) and the second material (20) for 0.2 seconds.

6. The polyurethane foaming application method according to claim 4, wherein the mixture B (40) is obtained by subjecting the mixture A (30) in combination with the air (80) to mixing for 0.1 seconds.

7. The polyurethane foaming application method according to claim 4, wherein the mixture C (50) is obtained by mixing the mixture B (40) with the air (80).

8. The polyurethane foaming application method according to claim 4, wherein density of the mixture B (40) is mainly adjusted through the air (80) of 4 to 10kg / cm2, and pressure of the air (80) is inversely proportional to foaming density of the mixture B (40), wherein density of the mixture B (40) is between 300 to 500Kg / M3.

9. The polyurethane foaming application method according to claim 4, wherein the mixture C (50) is mainly adjusted through the air (80) of 6 to 8Kg / cm2,2025204565   18 Jun 202512and pressure of the air (80) is inversely proportional to foaming density of the mixture B (50), wherein density of the mixture C (50) is between 65 to 200Kg / M3.

Images