KR101190082B1 - Vacuum Heat Insulator for a Door and Method for Preparing the Same - Google Patents

Abstract

The present invention relates to a vacuum insulator applied to a door (door) and a method for manufacturing the same, and more particularly, amorphous silica powder, reinforcing fibers, and radiation heat shielding additives and reinforcing materials are dry mixed and molded by a press. The molded product is wrapped in 6-side wrapping with PE film or heat-shrink film, and then vacuum-packed with a film of nylon, PET, PP, aluminum multilayer film, etc., which has excellent heat transmittance value of 1.0W / m² or less when applied to doors. Vacuum insulation applied to the door which shows the performance and improves the disadvantages of the heat insulating material applied to the existing door due to the excellent thermal conductivity, hygroscopicity and workability than the heat insulating materials such as polyurethane and glass wool, which were applied to the inside of the door, especially the front door. And it relates to a manufacturing method thereof.
According to the present invention, the heat insulating material applied to the door of the present invention is harmless to the human body because it uses silica powder, and when applied as a heat insulating material to the door due to the handling, moisture resistance and excellent heat insulating performance of the existing organic-based, inorganic-based heat insulating materials To improve the disadvantages, and also easy to construct, even if applied in a thin thickness there is an effect that can be applied to the interior of the door to satisfy the legal standards.

Description

Vacuum Heat Insulator for Door and Method for Preparing the Same

The present invention relates to a vacuum insulator applied to a door (door) and a method for manufacturing the same, and more specifically, 1 to 100 ㎛ in diameter of amorphous silica powder, mixed fibers of inorganic fibers and organic synthetic fibers or organic synthetic fibers, After mixing 6 ~ 40mm length reinforcing fiber, radiation shielding additive and reinforcing material dry and molding by press, the manufactured molded body is wrapped on 6 sides with heat shrink film selected from PE, LLDPE, PP, PVC, PET. It is vacuum-packed with final finishing materials such as nylon, PET, PP, and aluminum multilayer film, and has excellent thermal conductivity, hygroscopicity, and workability than the heat insulating materials such as polyurethane and glass wool, which were applied to existing doors, especially the front door. The present invention relates to a vacuum insulator and a method of manufacturing the same, which are applied to a door having improved disadvantages of the heat insulator applied to the door.

The thermal conductivity of the building energy-saving design standard is higher than that of the “A” grade insulation, so even if it is constructed with a low insulation thickness, it exceeds the heat transfer rate (window and door) standard of the building part specified in the 'Regulations on Equipment Standards of Buildings'. It satisfies the disadvantages that are vulnerable to the fire of the existing organic type (polyurethane), and secured flame retardant performance with inorganic material, and the final finishing packaging by vacuum packing with nylon film after wrapping the heat shrinkable film. The present invention relates to a non-combustible vacuum insulator and a method of manufacturing the same, which are applied to doors that have no problems with the existing glass wool, such as odor or smell when treated as an environmentally-friendly raw material such as silica powder.

The vacuum insulator applied to the door of the present invention has a thermal conductivity value of about 0.01, which is superior to those of the highest grade 'ga' (heat conductivity value of 0.034 W / mK or less), which is classified above. It is a high-performance heat insulator that exhibits less than W / mK performance, and even if the thickness is less than half the thickness of the existing heat insulator, it is possible to secure the equivalent heat transfer rate.

According to the `` Regional Heat Transfer Rate Table of Building Parts by Region '' prescribed in the `` Regulations on Equipment Standards of Buildings '', the `` windows and doors '' of building parts are outside of apartments and apartments, and directly facing outside air. In case of facing indirectly, the heat transfer rate based on the thermal insulation performance of the building is based on the three regions of Central, Southern, and Jeju islands. In the case of apartment houses directly facing the outside air (3.00 W / ㎡K or less).

The above criteria stipulates the technical standards for the installation of building equipment and the matters necessary for the prevention of heat loss of buildings and the rational use of energy, and the values of heat permeability for windows and doors described above (3.00 W / ㎡K and below) was revised on July 10, 2008 from the previous standard (3.84 W / ㎡K and below), and the value of heat permeation rate for each part of the building will be continuously strengthened in accordance with the prevention of heat loss of the building. Insulation applied to doors also need a continuous improvement in performance.

In general, polyurethane or glass wool is most commonly used as a thermal insulation material in current doors (especially entrance doors), but polyurethane is an organic combustible material, and glass wool is an inorganic non-combustible material or glass wool is brought into contact with the skin during handling. Avoid use, weaken the change over time due to moisture, the thermal conductivity value is lowered, or moisture penetrates the glass wool and the glass wool shape is deformed to create an empty space inside the door, which may cause problems in the insulation performance of the glass wool. In addition, the urea resin included in the glass wool binder may generate an ammonia odor by reaction with moisture, thereby causing environmental problems.

The fire door for buildings disclosed in Korean Patent Publication No. 2003-0042783 is intended to improve the insulation and sound insulation as well as the fire resistance characteristics by forming a fireproof insulation foam layer as the inner core of the door. Insulation foam layer refers to the foaming by mixing inorganic fibers such as glass fiber, rock wool, slag fiber and latex-based water-soluble binder or foaming nitrogen foam, and curing it. However, mixing and foaming the inorganic fibers and the water-soluble binder is a very difficult part in the manufacturing process, and may cause problems in uniformity of the inorganic fibers during foaming.

The soundproofing and insulating panels disclosed in Korean Utility Model No. 20-0254827 are for soundproofing and insulating panels that can be detached and attached to a general front door, and are made by attaching panels made of styropol, sponge, etc. using adhesives, etc. Soon, due to the flammability of the fire, problems may arise that can prevent escape to the front door in the event of fire.

Insulation and condensation prevention doors and door frames disclosed in the Republic of Korea Patent Publication No. 10-2009-0021836 in the interior of the front door and door frame in the interior of the front door and door frame by inserting an insulating material such as urethane or fiberglass to insulate the interior It keeps mentioning. However, when the inside of the front door is made of urethane or glass fiber, as mentioned above, urethane is a combustible material, and has a structure that is very vulnerable to a fireproof structure by releasing toxic gas in case of fire. When the glass wool touches the skin and causes it to soothe it, the user avoids it, and the change in the thermal conductivity due to moisture is weak, and the value of thermal conductivity is lowered. There is a problem in the heat insulating performance to the glass wool, and the urea resin contained in the glass wool binder may cause an ammonia odor in response to the water, thereby causing environmental problems.

Therefore, there is a need for the development of a vacuum insulator that is applied to a door including not only excellent heat insulation performance and flame retardant performance, but also major functions such as handling strength improvement, hygroscopicity improvement, and environmental friendliness.

Accordingly, the present invention, as a result of research efforts to solve the problems as described above, a reinforcing fiber of 1 ~ 100㎛ diameter, 6 ~ 40mm in length of amorphous silica powder, mixed fibers of inorganic fibers and organic synthetic fibers or organic synthetic fibers Dry mix of radiant heat shielding additives and reinforcing materials, and molded by press, and the prepared molded body is heat-shrink film selected from PE, PP, LLDPE, PVC, and PET. It is vacuum-packed with final finishing materials such as multilayer films, and it has better thermal conductivity, moisture absorption and construction than conventional insulation materials such as polyurethane and glass wool. Improvements were made to complete the invention of this vacuum insulator.

It is an object of the present invention to provide a vacuum insulator applied to a door (door) and a method of manufacturing the same.

In order to achieve the above object, the present invention, 40 to 99% by weight of silica powder, mixed fibers of inorganic fibers and organic synthetic fibers or 0.5 to 20 weight of reinforcing fibers having a diameter of 1 to 100㎛, length of 6 to 40mm made of organic synthetic fibers %, Radiation heat shielding additive and 0 ~ 50% by weight of reinforcement material after dry mixing and press-molding the molded body by 6-side wrapping (wrapping 1 ~ 2 times) with shrink film such as PE, LLDPE, and then nylon, PET, Provided is a vacuum insulator applied to a door (door) characterized in that the vacuum packaging as a final finish such as PP, aluminum multilayer film.

The present invention also provides a method for constructing a vacuum insulator prepared by the present invention in which the vacuum insulator is bonded to the inside of the door with a water-soluble adhesive, and the joint portion of the door and the vacuum insulator is filled with paper honeycomb or urethane foam.

According to the present invention, the heat insulating material applied to the door of the present invention is harmless to the human body because it uses silica powder, and when applied as a heat insulating material to the door due to the handling, moisture resistance and excellent heat insulating performance of the existing organic-based, inorganic-based heat insulating materials To improve the disadvantages, and also easy to construct, even if applied in a thin thickness there is an effect that can be applied to the interior of the door to satisfy the legal standards.

In one aspect, the present invention is applied to a door containing amorphous silica, mixed fibers of inorganic fibers and organic synthetic fibers or reinforcing fibers having a diameter of 1 to 100 µm, a length of 6 to 40 mm, a radiation shielding material and a reinforcing material made of organic synthetic fibers. In the heat insulating material, 40 to 99% by weight of silica powder, 0.5 to 20% by weight of reinforcing fiber, 0 to 50% by weight of radiant heat shielding additive and reinforcing agent (opaque agent) are dry mixed, and after press molding, PE, PP, After wrapping six sides with heat-shrink film made of polyolefin such as LLDPE, PVC, PET, etc., it is vacuum-packed with final finishing materials such as nylon, PET, PP, aluminum multilayer film, etc. It is characterized by a vacuum insulator applied to the door).

The present invention will be described in detail as follows.

The silica powder used in the present invention is an amorphous, very light powder with very small basic particles, a spherical shape, a large surface area, a characteristic surface characteristic, and a high purity silicon compound. The average diameter of the spherical basic particles is 5 to 50 nm. It has a size of, and has a large surface area due to the small particles, the value is in the form of a powder ranging from 40 to 400 m 2 / g.

Silica powder is used 40 to 99% by weight in the total composition of the silica insulation. If the amount is less than 40% by weight, the thermal conductivity value measured in accordance with the thermal conductivity measurement method of KS L 9016 thermal insulation material becomes 0.01 W / mK or more, so that the thermal insulation performance is deteriorated. There is a problem in moldability that the shape of the edge portion of the molded body is lowered.

The reinforcing fiber used in the present invention uses a fiber having a diameter of 1 to 100 µm and a length of 6 to 40 mm, which is made of a mixed fiber or an organic synthetic fiber of an inorganic fiber and an organic synthetic fiber, and the inorganic fiber includes glass fiber and ceramic fiber. The organic synthetic fiber is used, such as PAN, PVA, PP.

Reinforcing fibers use from 0.5 to 20% by weight. If the amount is less than 0.5% by weight, there is a problem in that the strength expression effect and formability by the reinforcing fiber is lowered, and when it exceeds 20% by weight, the thermal conductivity value measured based on the method of measuring the thermal conductivity of KS L 9016 thermal insulation material is relatively high. This becomes 0.01 W / mK or more, and there exists a problem that heat insulation performance falls. In addition, when the fiber length of less than 6 mm is used, the reinforcing effect of the fiber is inferior, and when the fiber length of 40 mm or more is used, the fiber is difficult to disperse during dry mixing with silica powder, and the agglomeration of the fiber itself occurs. A problem arises in that moldability deteriorates.

The reinforcing fibers are evenly dispersed to form an integrated bond with the silica powder aggregate to exhibit the primary formability and strength enhancing effect of the present heat insulating material, and can be used as a mixed fiber or an organic synthetic fiber of an inorganic fiber and an organic synthetic fiber. Can be.

The additive used in the present invention uses an opaque agent as a filler (filler). The opacifying agent uses talc, silicon carbide, iron oxide, zirconium oxide, graphite, etc., and 0 to 50% by weight. When it exceeds 50% by weight, the thermal conductivity value measured based on the thermal conductivity measurement method of KS L 9016 insulation material becomes relatively 0.01W / mK or more, and thus there is a problem that the thermal insulation performance is lowered.

The six-side wrapping used in the present invention (Wrapping) packaging uses a heat shrink film such as PE, PP, LLDPE, PVC, wrapping is carried out once or twice. PE film packaging wraps the silica insulation molded body with PE film and seals it with heat adhesion. Shrink film packaging such as LLDPE wraps the silica insulation molded body with the shrink film such as LLDPE and shrink wraps using a shrink wrap machine.

In the present invention, the final finishing materials such as nylon, PET, PP, aluminum multilayer film used as the final finishing material uses a film having a thickness of 40 ㎛ ~ 250 ㎛, the final finishing packaging is sealed by heat sealing by vacuum packaging .

Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood by those skilled in the art that these embodiments are only for illustrating the present invention and that the scope of the present invention is not construed as being limited by these embodiments.

Measurement of physical properties of vacuum non-combustible insulation

Insulating material was applied to the door by dry mixing with the ingredients and contents as described above, and the manufacturing method was based on the method described in the detailed description of the invention.

The prepared vacuum insulation was attached to the inside of the front door with a water-soluble adhesive, and the joints were filled with urethane foam, and the handle portion and the front door keys were filled with paper honeycomb or urethane foam.

[Measurement of properties]

The door with insulation was tested for door open and close repeatability according to KS F 2632 test method. The number of repetitions was tested 100,000 times according to KS F 3109 to check the state of insulation. It was.

The moisture absorption test was measured in accordance with ASTM C 1104. The moisture absorption rate was 0.2 V%, which had little effect on the insulation, such as shape deformation of the insulation.In the thermal conductivity measurement according to KS L 9016, the initial thermal conductivity was 0.008 W / mK at 0.008 W / mK also satisfies the thermal conductivity performance.

In case of applying the above-mentioned insulation material to thickness of 8mm, the heat transmittance value of the door is 0.9W / ㎡K. 3.00W / m <2> K or less) 3 times or more, and even if the heat insulating material of this invention was applied with very low thickness, there was no problem at all.

Flame retardant performance is measured according to KS F ISO 1182 (non-flammability test method of building materials) and KS F 2271 (gas hazard test) according to the flame retardant performance standard of building interior finishing material (Notice No. 2006-476 of Ministry of Construction and Transportation). Flame retardant performance was secured as flame retardant material.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, those skilled in the art will appreciate that such specific embodiments are merely preferred embodiments and that the scope of the present invention is not limited thereby. something to do. Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.

Claims (8)

40 to 99% by weight of silica powder, mixed fibers of inorganic fibers and organic synthetic fibers, or fibers of 1 to 100 µm in diameter and 6 to 40 mm in length, composed of glass fibers, ceramic fibers, PAN, Nylon, PVA and PP. After 0.5 ~ 20% by weight of the reinforcing fiber selected from the group consisting of, the heat-blocking additive and 0 ~ 50% by weight of the reinforcing material dry-blended and press-molded molded body 6 sides lapping (Wrapping, 1-2 times), A vacuum insulator applied to a door (door), which is vacuum-packed with a nylon final finishing material, and has a heat permeability value of 1.0 W / m 2 K or less.
According to claim 1, wherein the silica powder is a spherical amorphous high-purity silicon compound, the average particle diameter of the spherical base particles 5 ~ 50nm, the specific surface area of the door (door) characterized in that the powder form of 40 ~ 400m 2 / g Applied to vacuum insulation.
delete The vacuum insulator according to claim 1, wherein the radiation shielding additive and the reinforcing material are selected from the group consisting of talc, silicon carbide, iron oxide, zirconium oxide and graphite as an opaque agent.
The vacuum insulator applied to a door (door) according to claim 1, wherein the heat shrink film for wrapping the six sides is selected from PE, PP, LLDPE, PVC, and PET.
The method of claim 1, wherein the film, such as nylon, PET, PP, aluminum multilayer film used as the final finishing material is a vacuum insulator applied to the door (door) characterized in that the vacuum packaging finish of the film of 40 ㎛ ~ 250 ㎛ thickness .
The vacuum insulator according to claim 6, wherein the vacuum pressure during vacuum packaging is 0.01 to 700 mbar.
The vacuum insulator is bonded to the inside of the door with a water-soluble adhesive, and the joint portion of the door and the vacuum insulator is manufactured by any one of claims 1 to 2, 4 to 7, which is filled with paper honeycomb or urethane foam. Method of evacuated vacuum insulator.