Heat-insulating adhesive composition for manufacturing heat-insulating tape, heat-insulating tape, and method for manufacturing heat-insulating adhesive composition and heat-insulating tape for manufacturing heat-insulating tape

Abstract

Provided are a heat-insulating adhesive composition for manufacturing a heat-insulating tape, a heat-insulating tape, and a method for manufacturing the heat-insulating adhesive composition for manufacturing the heat-insulating tape and the heat-insulating tape. The present invention is realized through a process of coating a heat-insulating adhesive composition containing a heat-insulating hollow body and an adhesive binder on the upper surface of a base layer and drying the heat-insulating adhesive composition coated on the upper surface of the base layer. According to the present invention, there is provided a heat-insulating tape using a heat-insulating adhesive composition for manufacturing a heat-insulating tape that enables minimizing a decrease in heat-insulating performance due to a loss in coating (application) thickness during the drying process.

Description

Technical Field

[0001] The present invention relates to a heat-insulating adhesive composition for manufacturing a heat-insulating tape, a heat-insulating tape, and a method for manufacturing a heat-insulating adhesive composition and a heat-insulating tape for manufacturing a heat-insulating tape. More specifically, the present invention relates to a heat-insulating adhesive composition for manufacturing a heat-insulating tape, a heat-insulating tape, and a method for manufacturing a heat-insulating adhesive composition and a heat-insulating tape that can minimize the decrease in heat-insulating performance due to the loss of coating (application) thickness during the drying process.

Background Art

[0002] Tape-shaped heat-insulating materials are taped to pipes and cables such as melting furnace operating equipment and exhaust manifolds for heat-insulating treatment. For this purpose, various types of heat-insulating tapes are provided in the market. As an example, a silica tape woven from silica fibers is provided as a heat-insulating tape for ultra-high temperatures.

[0003] On the other hand, a heat-insulating composition containing hollow ceramic beads and a binder is widely used for preparing a heat-insulating paint. A heat-insulating tape produced by using such a heat-insulating composition as an adhesive has not been provided so far.

Summary of the Invention

Problems to be Solved by the Invention

[0004] Therefore, an object of the present invention is to provide a heat-insulating adhesive composition for manufacturing a heat-insulating tape, a heat-insulating tape, and a method for manufacturing a heat-insulating adhesive composition and a heat-insulating tape that can minimize the decrease in heat-insulating performance due to the loss of coating (application) thickness during the drying process.

[0005] The problems to be solved by the present invention are not limited to the above-mentioned problems, and include other technical problems that can be clearly understood by those having ordinary knowledge in the technical field to which the present invention belongs from the following description.

Means for Solving the Problems

[0006] The heat-insulating adhesive composition for manufacturing a heat-insulating tape according to the present invention for achieving the above object includes a heat-insulating hollow body; and an adhesive binder.

[0007] On the other hand, the method for manufacturing a heat-insulating adhesive composition for manufacturing a heat-insulating tape according to the present invention includes: (a) a step of mixing a heat-insulating hollow body and an adhesive binder; and (b) a step of stirring the mixture of the heat-insulating hollow body and the adhesive binder.

[0008] On the other hand, the heat-insulating tape according to the present invention includes a base layer; and a heat-insulating adhesive composition coated on the upper surface of the base layer, and the heat-insulating adhesive composition is characterized by including a heat-insulating hollow body and an adhesive binder.

[0009] On the other hand, the method for manufacturing a heat-insulating tape according to the present invention includes: (a) a step of coating a heat-insulating adhesive composition including a heat-insulating hollow body and an adhesive binder on the upper surface of a base layer; and (b) a step of drying the heat-insulating adhesive composition coated on the upper surface of the base layer.

Effect of the Invention

[0010] According to the present invention, there are provided a heat-insulating adhesive composition for manufacturing a heat-insulating tape that can minimize a decrease in heat-insulating performance due to a loss of coating (application) thickness during a drying process, a heat-insulating tape using the same, and each manufacturing method.

[0011] The effects of the present invention are not limited to the above-described effects, and include other effects that can be clearly understood by those having ordinary knowledge in the technical field to which the present invention pertains from the following description.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

[0013] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. It should be noted that the same components in the drawings are denoted by the same reference numerals as much as possible everywhere. In addition, the description of known functions and configurations that may unnecessarily obscure the gist of the present invention is omitted.

[0014] FIG. 1 is a procedure flowchart for explaining a method for manufacturing a heat-insulating adhesive composition according to an embodiment of the present invention. Hereinafter, with reference to FIG. 1, a method for manufacturing a heat-insulating adhesive composition according to an embodiment of the present invention will be described.

[0015] First, the manufacturer mixes 54 to 56 parts by weight of an acrylic copolymer and 44 to 46 parts by weight of water (distilled water or purified water, pH 7), and then stirs for a long time (for example, 30 minutes to 60 minutes) at a stirring speed of about 30 rpm to 100 rpm in a sealed container to produce an acrylic binder which is an adhesive binder (S110).

[0016] Thereafter, the manufacturer mixes 4 to 22 parts by weight of a ceramic hollow body (hollow ceramic beads) which is a heat-insulating hollow body excellent in fire resistance and heat-insulating efficiency and 100 to 102 parts by weight of the acrylic binder produced in the above-described S110 step to produce a mixture of the ceramic hollow body and the acrylic binder (S130). The mixture thus produced is stirred under the following stirring conditions to produce a heat-insulating adhesive composition according to the present invention (S150).

[0017] When the present inventor stirs the mixture using a stirring blade with a simple propeller structure generally used when stirring the mixture at the S150 stage described above, it was found that although sufficient stirring is not actually performed, the stirring is regarded as being completed due to the vortex phenomenon caused by the rotational force of the stirring blade.

[0018] As a result, the present inventor produced and used a dispersion-type stirring blade structure 400 as shown in FIG. 4 to stir the mixture, and confirmed that the ceramic hollow bodies are uniformly distributed in the mixture despite the high viscosity of the acrylic binder.

[0019] Specifically, referring to FIG. 4, the stirring blade structure 400 used in the method for producing a heat-insulating adhesive composition according to an embodiment of the present invention includes a rotating shaft 410, a main body panel 430, and blade portions 450.

[0020] The rotating shaft 410 is fixedly installed at the center of the main body panel 430 having a disc-shaped structure so as to be orthogonal thereto. A plurality of stirring holes 435 are formed at regular intervals along the circumference of the disc-shaped main body panel 430 at a certain distance from the rotating shaft 410.

[0021] Through such a plurality of stirring holes 435, not only is vertical stirring between the upper space and the lower space of the main body panel 430 possible, but by reducing the load on the main body panel 430, the load on the motor that rotationally drives the rotating shaft 410 can be reduced.

[0022] On the other hand, a part of the plurality of blade portions 450 formed by extending from the outer end of the disc-shaped main body panel 430 and formed of a sawtooth structure continuously provided along the circumference of the disc-shaped main body panel 430 is bent upward to form an angle of +90° with the main body panel 430, and the remaining part of the plurality of blade portions 450 is bent downward to form an angle of -90° with the main body panel 430.

[0023] More specifically, it is preferable that the wing portions 450 having an upwardly bent structure and the wing portions 450 having a downwardly bent structure are sequentially crossed along the circumference of the disc-shaped main body panel 430.

[0024] When stirring the mixture using the stirring blade structure 400 having the structure as shown in FIG. 4, generation of vortices in the mixture is minimized, and not only can a large amount of fine bubbles be generated during stirring, but also physical stirring of the acrylic binder and the ceramic hollow body, which are substances that do not chemically mix with each other, is performed very effectively.

[0025] On the other hand, when implementing the present invention, the diameter of the disc-shaped main body panel 430 is preferably about 70 to 90% of the diameter of the stirring container.

[0026] Specifically, when the diameter of the disc-shaped main body panel 430 is less than 70% of the diameter of the stirring container, stirring at the peripheral portion inside the container is not sufficiently performed. When the diameter of the disc-shaped main body panel 430 exceeds 90% of the diameter of the stirring container, there is a problem of overloading the stirring motor.

[0027] Also, when implementing the present invention, the stirring speed of the mixture using the stirring blade structure 400 in FIG. 4 is preferably 200 rpm to 700 rpm.

[0028] Specifically, when the stirring speed is less than 200 rpm, there is a problem that the upper layer is not substantially stirred and solidifies, causing the upper and lower layers to separate. When the stirring speed exceeds 700 rpm, a large amount of bubbles having a relatively large size are generated. This causes a problem of deterioration of the heat insulation performance due to an excessive increase in voids in the heat insulating adhesive composition.

[0029] On the other hand, when implementing the present invention, the heat insulating adhesive composition manufactured by the manufacturing method shown in FIG. 1 may be a pressure sensitive adhesive (PSA) composition.

[0030] FIG. 2 is a procedure flowchart for explaining a method for manufacturing a heat insulating tape according to an embodiment of the present invention, and FIG. 3 is a diagram showing the structure of a heat insulating tape according to an embodiment of the present invention.

[0031] Hereinafter, with reference to FIGS. 2 and 3, a method for manufacturing a heat insulating tape 300 according to an embodiment of the present invention will be described.

[0032] First, the manufacturer prepares a base layer 310 required for manufacturing the heat insulating tape 300 by cutting a base layer 310 such as glass fiber or non-woven fabric into a required width and length (S210).

[0033] On the other hand, in carrying out the present invention, after weaving a glass fiber (E-Glass) used as a film material, waterproofing and flame retardant treatments are performed on the lower and upper surfaces respectively as pre-treatments for the coating treatment in the S230 step described later, whereby the base layer 310 can also be produced.

[0034] Thereafter, the manufacturer performs a coating treatment of the heat insulating adhesive composition by spreading and applying the heat insulating adhesive composition produced in the S150 step described above on the upper surface of the base layer 310 to a predetermined coating (application) thickness (for example, 1 mm) (S230).

[0035] In carrying out the present invention, the coating treatment of the heat insulating adhesive composition can be performed by a transfer coating method, and all of comma coating, knife coating method, mesh coating method, calendar coating method, etc. can be used.

[0036] Next, the manufacturer performs a drying treatment on the coated heat insulating adhesive composition (S250). In carrying out the present invention, the drying treatment of the heat insulating adhesive composition is preferably performed simultaneously by hot air drying treatment and infrared drying treatment in a drying chamber and for a predetermined reference time (for example, 5 to 10 minutes).

[0037] Specifically, in the case of an infrared and hot air mixing chamber composed of five drying zones, hot air at 80°C can be supplied to the first zone, hot air at 100°C to the second zone, hot air at 130°C to the third zone, hot air at 120°C to the fourth zone, and hot air at 120°C to the fifth zone.

[0038] Also, in the case of a drying chamber where the hot air treatment zone and the infrared treatment zone are separated, hot air at 80°C can be supplied to the first zone, hot air at 100°C to the second zone, infrared rays at 120°C to the third zone, infrared rays at 130°C to the fourth zone, and infrared rays at 130°C to the fifth zone.

[0039] In addition, in the case of a chamber where the upper and lower temperatures can be set individually, the temperature can be set such that the upper part is 80°C and the lower part is 100°C in the first zone, the upper part is 90°C and the lower part is 110°C in the second zone, the upper part is 110°C and the lower part is 130°C in the third zone, the upper part is 120°C and the lower part is 150°C in the fourth zone, and the upper part is 120°C and the lower part is 160°C in the fifth zone.

[0040] On the other hand, since a large number of fine bubbles are formed inside the heat-insulating adhesive composition produced through the stirring process according to the stirring conditions in the aforementioned S150 stage, when the S.V.R (solid content volume ratio) is 60%, when applying to a thickness of 1 mm, even after undergoing the drying process as described above, the coating (application) thickness of the heat-insulating adhesive composition will maintain 0.7 - 0.9 mm, which is 70 - 90% of the initial coating (application) thickness. Through this, the heat-insulating performance of the heat-insulating adhesive composition can be maintained in a very good state.

[0041] On the other hand, in the case of a heat-insulating adhesive composition according to the prior art, when the S.V.R (solid content volume ratio) is 60%, it usually only maintains 0.6 mm after the drying process when applying to a thickness of 1 mm.

[0042] Also, when implementing the present invention, by additionally coating a pressure sensitive adhesive (PSA) composition on the upper part of the heat-insulating adhesive composition after the drying process is completed as described above, the adhesive force of the heat-insulating tape according to the present invention can be further increased.

[0043] In addition, when implementing the present invention, the drying treatment step in the aforementioned S250 stage can also be additionally performed on the pressure-sensitive adhesive composition that has been coated. Further, when implementing the present invention, after the coating treatment of the heat-insulating adhesive composition, the pressure-sensitive adhesive (PSA) composition can be additionally coated without performing the drying treatment, and then the aforementioned drying treatment step can be integrally performed.

[0044] Thereafter, the manufacturer can perform an aging treatment on the heat-insulating adhesive composition and the pressure-sensitive adhesive composition that have completed the drying treatment by storing the semi-finished product that has completed the drying treatment by the aforementioned method in a sealed space equipped with an internal air circulation system while maintaining a temperature of about 40 to 60°C for about 48 hours (S270).

[0045] After the execution of such an aging treatment, the manufacturer completes the production of the heat-insulating tape 300 according to the present invention by attaching a release film 370 to the upper surface of the heat-insulating adhesive composition layer 330 or the pressure-sensitive adhesive composition layer 350.

[0046] The terms used in the present invention are merely used to explain specific embodiments and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, terms such as "including" or "having" are intended to specify the existence of the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and it should be understood that the existence or possibility of addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof is not precluded in advance.

[0047] The preferred embodiments and application examples of the present invention have been illustrated and described above. However, the present invention is not limited to the specific embodiments and application examples described above, and it goes without saying that various modifications can be made by those having ordinary knowledge in the technical field to which the invention pertains without departing from the gist of the invention claimed in the claims. Such modifications should not be individually understood from the technical idea and prospect of the present invention.

Industrial Applicability

[0048] Industrial applicability of the present invention is recognized in the field of industries related to heat insulating tapes.

Claims

Claim 1 A heat-insulating hollow body; and A heat-insulating adhesive composition for manufacturing a heat-insulating tape, comprising an adhesive binder. Claim 2 (a) Mixing a heat-insulating hollow body and an adhesive binder; and (b) A method for manufacturing a heat-insulating adhesive composition for manufacturing a heat-insulating tape, comprising the step of stirring a mixture of the heat-insulating hollow body and the adhesive binder. Claim 3 A base layer; and A heat-insulating tape, comprising a heat-insulating adhesive composition coated on the upper surface of the base layer, wherein the heat-insulating adhesive composition comprises a heat-insulating hollow body and an adhesive binder. Claim 4 (a) Coating a heat-insulating adhesive composition comprising a heat-insulating hollow body and an adhesive binder on the upper surface of a base layer; and (b) A method for manufacturing a heat-insulating tape, comprising the step of drying the heat-insulating adhesive composition coated on the upper surface of the base layer.

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