JP2013204658A - Vacuum heat insulating material and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum heat insulating material which is excellent in flexibility and heat insulating property, and a method of manufacturing the same.SOLUTION: A kneaded aqueous solution 10 containing a number of ceramic-based or glass-based balloon particles 11 covered with a water-soluble resin and a heat shielding pigment 13 covered with a water-soluble resin 12 is applied onto both surfaces of a core material 2 comprised of deformable platy foamed plastic having flexibility and heat insulating property, and the solution 10 is dried. A heat-shielding heat-insulating coating layer 3 in which the heat shielding pigment 13 and a number of balloon particles 11 are arrayed with the water-soluble resin 12 as a binder is formed on both surfaces of the core material 2. The core material 2 is accommodated in a bag-shaped gas barrier film 4 and sealed under vacuum of 950 mmhg or less.

Description

  The present invention relates to a vacuum heat insulating material excellent in flexibility and heat insulating properties, and a method for manufacturing a vacuum heat insulating material.

  Conventionally, as a heat insulating material used for a housing building material or the like, a fiber body such as glass wool or rock wool or a foam body such as urethane foam is generally used. These heat insulating materials need to increase the thickness of the heat insulating material in order to improve the heat insulating performance, but there are problems such as a limitation in the space for arranging the heat insulating material and a reduction in the internal accommodation volume due to the arrangement of the heat insulating material. there were.

  Therefore, a vacuum heat insulating material was developed in which a glass wool core was wrapped with a gas barrier film and sealed in a vacuum state. Such a vacuum heat insulating material can enhance the heat insulating performance while thinning the core material. As examples of the vacuum heat insulating material, those disclosed in Japanese Patent Application Laid-Open Nos. 7-96563, 9-136367, and 2006-342839 are known.

JP-A-7-96563 JP-A-9-136367 JP 2006-342839 A

  However, the conventional vacuum heat insulating material is made of glass fiber or glass fiber which is a glass fiber random fiber arrangement so as to secure holes for lowering the thermal conductivity, but 1000 mmhg or more in order to exert a heat insulating effect. Therefore, there was a problem that it was hard and easily cracked when it was bent. Therefore, if there is a bent portion or unevenness in the space where the heat insulating material is arranged, there is a problem that these shapes cannot be followed and a gap is formed, resulting in a decrease in heat insulation. In addition, if the core material is preliminarily molded so as to conform to the bent portion and the unevenness, there is a problem that the manufacturing cost increases.

  The present invention has been made in view of the above problems, and an object thereof is to provide a vacuum heat insulating material excellent in flexibility, heat insulating properties and heat retaining properties that can be used for bending and the like, and a method for manufacturing the vacuum heat insulating material. To do.

  In order to solve the above-mentioned problems, the vacuum heat insulating material according to the present invention has a large number of heat-shielding pigments and balloon particles using a water-soluble resin as a heat-shielding binder on at least one surface of a deformable flexible and heat-insulating core material. The first characteristic is that the heat insulating and heat insulating film layers are arranged, and the concentric material is sealed in a bag-like gas barrier film under a vacuum of 950 mmhg or less.

  The core material can be plate-shaped, square-shaped, circular in cross-section, etc., and is preferably foamed plastic, but other materials that can exhibit both performances are urethane foam, sponge, cardboard, and the like. Furthermore, glass wool and glass fiber fiber can also be used. As a material capable of heat insulation, a material in which a bag such as cloth, leather, polypropylene, acrylic sheet, vinyl chloride, gypsum, shirasu balloon, silica balloon, hollow ceramic or the like is put in a bag is also applicable.

  The balloon particles are made of balloon particles such as ceramic, alumina or glass having a specific gravity of less than 1, and are excellent in heat insulation and heat retention. Further, the heat shielding pigment having a specific gravity of more than 1 is made of, for example, titanium oxide or iron chrome, which has an infrared reflection effect, has excellent heat shielding properties, and is excellent in durability. Moreover, since the ceramic or glass-based balloon particles have a water absorption rate of 0.1% or less and have a waterproof function, the waterproof function is imparted to the heat-insulating and heat-insulating film layer.

  According to the vacuum heat insulating material according to the present invention, since the heat insulating property of the heat insulating and heat insulating film layer is added to the heat insulating property of the core material, it is not necessary to maintain a high vacuum degree of 1000 mmhg or more, and the gas barrier has a vacuum degree of 950 mmhg or less. By sealing in the film, sufficient heat shielding properties, heat insulating properties, and heat retaining properties can be secured by their combined effects. In particular, by sealing under a vacuum degree of 950 mmhg or less, unlike the case of sealing under a high vacuum degree of 1000 mmhg or more, the holes contained in the core material are not crushed, and the heat insulation effect by maintaining the vacuum degree It is possible to achieve both heat insulation effects by maintaining pores.

  Since a heat-insulating and heat-insulating film layer using a flexible plate-shaped core material and a large number of heat-shielding pigments and balloon particles arranged with a water-soluble resin as a heat-insulating binder, can follow the deformation of the core material. The vacuum heat insulating material according to the invention is excellent in flexibility. Therefore, it can be bent freely, there is no crack breakage, and it can follow these shapes even in places where there are bent portions or irregularities, and can be arranged appropriately without gaps.

  Even if a vacuum break occurs due to long-term use, the presence of the heat-insulating and heat-insulating film layer ensures certain heat-insulating performance, heat-insulating performance, and heat-insulating performance.

  The vacuum heat insulating material according to the present invention is characterized in that the degree of vacuum is 450 mmhg to 750 mmhg.

  By sealing the core material in a gas barrier film under a low vacuum level of 450 mmhg to 750 mmhg, the core material can be prevented from being crushed, and the effects of flexibility, heat insulation, and heat retention can be further exhibited.

  A third feature of the vacuum heat insulating material according to the present invention is that the heat insulating heat insulating film layer is formed around the core material.

  By forming a heat-insulating and heat-insulating film layer having a strong sandwich structure around the core material, heat insulating properties, waterproof properties, and heat retaining effects are further improved.

  The vacuum heat insulating material according to the present invention is characterized in that the core material after sealing has a thickness of 20 μm to 10 mm.

  The vacuum heat insulating material according to the present invention is characterized in that the dry thickness of the heat insulating heat insulating film layer is 100 to 3000 μm.

  If the dry thickness is less than 100 μm, the heat insulating property is lowered, and if it exceeds 3000 μm, the film thickness strength is insufficient, which causes cracks and cracks. Moreover, the followability with respect to a deformation | transformation of a core material falls. For this reason, the range of 100-3000 micrometers is preferable from the reason of heat insulation, intensity | strength, and followable | trackability.

The vacuum heat insulating material according to the present invention is characterized in that titanium oxide (TiO ₂ ) or iron chrome (Fe—Cr) is used as a heat shielding pigment having a specific gravity exceeding 1.

  The method for producing a vacuum heat insulating material according to the present invention comprises a large number of ceramic or glass balloon particles coated with a water-soluble resin on at least one surface of a deformable flexible and heat insulating plate-shaped core material. Then, a kneaded aqueous solution containing a heat-shielding pigment coated with a water-soluble resin was applied and dried, and at least one surface of the core material was arranged with a large number of heat-shielding pigments and balloon particles using the water-soluble resin as a heat-shielding binder. The first characteristic is that a heat-insulating and heat-insulating coating layer is formed, the concentric material is housed in a bag-shaped gas barrier film, and sealed under a vacuum of 950 mmhg or less.

  The method for producing a vacuum heat insulating material according to the present invention includes a large number of ceramic or glass materials having a specific gravity of less than 1 and coated with a water-soluble resin on at least one surface of a deformable flexible and heat insulating plate-shaped core material. A kneaded aqueous solution comprising a plurality of balloon particles / heat-shielding pigments combined with ceramic particles or glass-based balloon particles having a specific gravity of less than 1 and a heat-shielding pigment having a specific gravity of more than 1 using a water-soluble resin as a binder. A plurality of balloon particles / heat-shielding pigment assemblies in which balloon particles and a heat-shielding pigment are combined with a water-soluble resin as a heat-shielding binder on the surface layer are arranged on at least one surface of the core material, and the inner layer is coated. A heat-insulating and heat-insulating coating layer in which a large number of balloon particles are arrayed with a water-soluble resin as a binder is formed in the part, and the concentric material is stored in a bag-shaped gas barrier film. The second feature to be sealed under the following vacuum mmHg.

  In producing a vacuum heat insulating material, the surface (one surface) of the core material is coated with a water-soluble resin, and a large number of ceramic or glass balloon particles having a specific gravity of less than 1, and a specific gravity of less than 1 using a water-soluble resin as a binder. By applying a kneaded aqueous solution containing a large number of balloon particles / heat shield pigments combined with ceramic or glass balloon particles and a heat shield pigment with a specific gravity of more than 1, it is bonded to the balloon particles by the buoyancy of the balloon particles. The heat-shielding pigment having a specific gravity exceeding 1 floats on the surface layer portion of the coating layer.

  A thermal barrier pigment with a specific gravity of more than 1 settles according to its weight and does not float on the surface layer of the coating layer by itself, but floats on the surface layer of the coating layer using the buoyancy of the balloon particles. The pigment can be exposed and firmly fixed on the surface. As a result, heat insulating pigments are arranged on the surface layer of the core material after drying, so that the heat insulating property and waterproofing are achieved by the combined effect of the heat insulating property of the core material, the heat insulating property of the heat insulating heat insulating film layer, and the heat insulating property by vacuum sealing. Improves. Thereby, the heat insulating material excellent in heat insulation, heat insulation, waterproofness, and heat retention can be manufactured.

  After the coating layer is dried, the thermal barrier binder holds the bonding state between the balloon particles and the thermal barrier pigment firmly and flexibly, and demonstrates the durability and flexibility of the coating layer. Because it uses water-soluble resin and does not use organic solvent, it is ideal for work environment and safety and health.

  The method for producing a vacuum heat insulating material according to the present invention is to obtain a primary kneaded aqueous solution by kneading 10 to 55% by weight of water and 10 to 80% water-soluble resin with respect to 100% by weight of balloon particles in obtaining a kneaded aqueous solution. A third feature is that the final kneaded aqueous solution is obtained by kneading 1 to 80% by weight of the heat shielding pigment with respect to 100% by weight of the primary kneaded aqueous solution.

  As described above, according to the vacuum heat insulating material according to the present invention, it is possible to obtain a vacuum heat insulating material having flexibility that can be bent freely and excellent in heat shielding properties, heat insulating properties, heat retaining properties, and durability. Thereby, a heat insulating material can be arrange | positioned without a clearance gap also on a curved surface or an uneven surface, and the outstanding heat insulation effect can be exhibited. In addition, by providing an excellent heat-insulating and heat-insulating layer in the gas barrier film, even if the gas barrier film is damaged, a certain heat-insulating and insulating effect can be maintained. As a material or as a heat insulating material for a refrigerator, a cooler / heater, a vending machine, etc., it has an excellent effect that it can be applied to a wide range of applications.

  Moreover, according to the manufacturing method of the vacuum heat insulating material which concerns on this invention, there exists the outstanding effect that the vacuum heat insulating material provided with the outstanding performance described above can be manufactured easily at low cost. Furthermore, an excellent effect is obtained in that it is possible to obtain a vacuum heat insulating material having excellent flexibility that does not cause cracks or cracks in the core material or the heat insulating heat insulating film layer.

Cross section of vacuum insulation material, The main part enlarged sectional view of the vacuum heat insulating material, Flow chart for producing a kneaded aqueous solution, (A) is a diagram showing a primary kneaded product, (B) is a diagram showing a secondary kneaded product (kneaded aqueous solution), It is explanatory drawing which shows a mode that a core material is sealed to a gas barrier film using a vacuum packaging machine.

  DESCRIPTION OF EMBODIMENTS Embodiments for carrying out the present invention will be described with reference to the drawings. 1 to 5 show an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a vacuum heat insulating material.

  As shown in FIG. 1, the vacuum heat insulating material 1 has a structure in which a heat insulating heat insulating film layer 3 is formed on both surfaces of a plate-like core material 2 and is sealed with a gas barrier film 4 at a predetermined degree of vacuum.

  The core material 2 is composed of a plate-like material having flexibility and heat insulation that can be bent, specifically, foamed plastic. The thickness of the core material 2 before sealing is 1.5 to 30 mm (illustration example). However, the thickness of the core 2 after sealing has a thin cross section of 1/3 before sealing, that is, 0.5 to 10 mm (1 mm in the illustrated example). The foamed plastic is obtained by foaming a synthetic resin, has a large number of pores 5, and is made of foamed polystyrene (EPS), foamed styrene, or the like. Raw materials used for foamed plastics are polystyrene (PS), polystyrene (PS), polyethylene (PE), polypropylene (PP), polyurethane (PUR), phenolic resin (PF), polyvinyl chloride (PVC), polyimide (PI), silicon (SI), and the like.

  In addition, as the core material 2, other materials having flexibility and heat insulation that can be bent are also applicable. For example, urethane foam, sponge, and cardboard are possible. Furthermore, heat insulating materials such as glass wool and glass fiber fibers can be applied. As a material capable of heat insulation, a material in which a bag of cloth, leather, polypropylene, acrylic sheet, vinyl chloride, gypsum, shirasu balloon, silica balloon, hollow ceramic or the like is put in a bag can be applied. The core material in which the latter powder is put in a bag can be formed as thin as 20 μm before and after sealing. Therefore, when the above materials are taken into consideration, the thickness of the core material 2 before sealing can be increased to 20 to 60 mm, and the thickness of the core material 2 before sealing can be increased to 20 to 20 mm.

  As shown in FIG. 2, the heat-insulating and heat-insulating film layer 3 has a large number of balloon particles / heat-insulating pigment assemblies 16 in which the balloon particles 11 and the heat-insulating pigment 13 are bonded to the surface layer portion 3A using the water-soluble resin 12 as a heat-insulating binder. A large number of balloon particles 11 are arranged in the inner layer portion 3B using the water-soluble resin 12 as a binder. Such a heat-insulating and heat-insulating film layer 3 is composed of a large number of balloon particles 11 coated on both surfaces of the core material 2 with a kneaded aqueous solution 10, that is, a water-soluble resin 12, and balloon particles 11 and a heat-shielding pigment using the water-soluble resin 12 as a binder. A kneaded aqueous solution 10 containing a large number of balloon particles / heat-shielding pigment conjugates U to which 13 is bonded is formed by coating and drying. The dry thickness t of the heat-insulating and heat-insulating film layer 3 is set to 100 to 3000 μm by applying the kneaded aqueous solution 10 once or several times. As shown in FIG. 2, the surface layer portion 3A of the heat insulating heat insulating film layer 3 has a higher proportion of the heat shielding pigment 13 than the inner layer portion 3B, and the inner layer portion 3B has a higher proportion of the balloon particles 11 than the surface layer portion 3A. It has become. A ceramic or glass system having a specific gravity of less than 1 is used for the balloon particles 11, and titanium oxide or iron chromium having a specific gravity of more than 1 is used for the thermal barrier pigment 13.

  In the heat insulating and heat insulating film layer 3, the heat insulating effect is exhibited by the heat insulating pigment 13 and the water-soluble resin heat insulating binder 12 in the surface layer portion 3 </ b> A. Moreover, it is thermally insulated by the balloon particles 11 of the surface layer part 3A and the inner layer part 3B, and the heat insulation effect is exhibited. And the heat insulation performance as a heat insulating material improves by the heat insulation effect of the foamed plastic which comprises the core material 2, and the composite effect of the vacuum heat insulation mentioned later.

  The balloon particles 11 are excellent in heat retention and have a waterproof function with a water absorption rate of 0.1% or less, and impart a waterproof function to the heat-insulating and heat-insulating film layer 3. Thereby, the heat insulating property and waterproofness which were excellent in the vacuum heat insulating material 1 can be provided.

  The gas barrier film 4 is formed in a bag shape, accommodates the core material 2 inside from one opening 4A, and seals the core material 2 under a predetermined degree of vacuum. It is made of synthetic resin such as polyethylene (PE), polypropylene (PP), vinyl chloride so that it can be thermocompression bonded. In addition, in order to improve heat insulation and heat insulation, exterior materials, such as aluminum, can be laminated | stacked.

  The vacuum heat insulating material 1 of the said structure is manufactured as follows.

First, the kneaded aqueous solution 10 is prepared. As shown in the flowchart of FIG. 3, each material of balloon particles 11, water 14, and water-soluble resin 12 is put into a container of a kneading apparatus, and stirred and kneaded to obtain a primary kneaded material 15. The blending ratio of each material is 50 parts by weight of water and 50 parts by weight of water-soluble resin with respect to 100 parts by weight of balloon particles. In addition, water can be appropriately selected from 10 to 55 parts by weight and water-soluble resin from 10 to 80 parts by weight with respect to 100 parts by weight of the balloon particles. By rotating the stirring plate in the container, the water-soluble resin 12 is coated around each balloon particle 11. The balloon particles 11 are made of ceramic, and use a spherical body of aluminum oxide (Al ₂ O ₃ ) having a particle size of 20 to 60 microns, an average porosity of 10% or more, and a specific gravity of 0.8 or less. When the aluminum oxide is fired at a high temperature of about 1400 ° C., balloon particles having a spherical shape and an average porosity of 10% or more can be stably obtained. An acrylic resin or the like is used for the water-soluble resin 12.

  Next, the heat shielding pigment (titanium oxide) 13 is put into the primary kneaded material 15 in the container, and stirred and kneaded to obtain the final kneaded aqueous solution (secondary kneaded material) 10. The blending ratio at this time is 30 parts by weight of the heat shielding pigment with respect to 100 parts by weight of the primary kneaded product. In addition, a titanium oxide can be suitably selected from 1-80 weight part with respect to 100 weight part of primary kneaded materials. When the titanium oxide 13 is introduced later, the water-soluble resin 12 becomes a heat-shielding binder around each balloon particle 11 to bond the heat-shielding pigment 13 to form a balloon particle / heat-shielding pigment combined body 16. Further, the balloon particle / heat-shielding pigment combination 16 may be combined with each other to form a composite unit U. When the total buoyancy of the individual balloon particles 11 exceeds the settling force of the heat shielding pigment 13, the individual balloon particles / heat shielding pigment combination 16 (or their composite unit) becomes a surface layer of the kneaded aqueous solution 10. Rise to the club.

  Then, by applying the kneaded aqueous solution 10 to both surfaces of the flat core material 2, as shown in FIG. 4, the balloon particle / heat-shield pigment combination 16 is applied to the surface layer portion 3A of the coating layer 3 before drying. As a result, a large number of balloon particles 11 are arranged in the inner layer portion 3B, and after drying, the heat shielding pigment 13 is fixed so as to be arranged in the surface layer portion 3A.

  After drying, the water-soluble resin 12 firmly holds the bonded state of the balloon particles 11 and the heat-shielding pigment 13 as a heat-shielding binder, flexibly follows the deformation of the core material 1, and exhibits the durability of the coating layer 3. To do. Furthermore, since the water-soluble resin 12 is used and no organic solvent is used, it is possible to prevent the organic solvent from appearing on the surface layer when the organic solvent is used, thereby inhibiting the original function of the heat-shielding pigment.

  After the coating layer 3 is formed on one side of the core material 2, the core material 2 is turned upside down, the kneaded water solution 10 is applied to the opposite side and dried to form the coating layer 3. A core material 2 in which a large number of balloon particles 11 are arranged in the portion 3B and the coating layer 3 in which the heat shielding pigment 13 is arranged on the surface layer portion 3A is formed on both surfaces can be obtained.

  Next, the core material 2 having the coating film layer 3 formed on both sides is accommodated in a bag-like gas barrier film 4, and the vacuum heat insulating material 1 is obtained using the vacuum packaging machine 100 shown in FIG.

  As shown in FIG. 5, the vacuum packaging machine 100 has a rubber seal portion 103, an O-ring portion 105, and a vacuum pulling tube 107 disposed on the upper surface of the base 101, and a heater portion 104 and a rubber seal portion 106 on the lower surface of the upper member 102. Has been placed. The other opening 4A of the gas barrier film 4 is already thermocompression bonded by the rubber seal part and the heater part 104, and the thermocompression bonding part 6 is formed.

  Then, the opening 4A of the gas barrier film 4 containing the core material 2 is positioned between the O-rings 105, 105 on the upper surface of the base 101 of the vacuum packaging machine 100, the upper member 102 is lowered as shown by the arrow, and the gas barrier film 4 The pressure-bonded portion on the side of the opening 4A is closed in close contact with the rubber seal portion 103 and the heater portion 104 from above and below, and in this state, the gas barrier film 4 has a vacuum degree of 450 mmhg to 675 mmhg. Vacuum is applied, and then the pressure-bonded part on the opening 4A side of the gas barrier film 4 is thermocompression-bonded by the heater part 104 under the same low vacuum degree, and the core material 2 is sealed. Thereby, the vacuum heat insulating material 1 is completed.

  By sealing the core material 2 on which the coating layer 3 is formed on both sides with a gas barrier film 4 under a low vacuum level of 950 mmhg or less, more specifically 450 mmhg to 675 mmhg, a high vacuum level of 1000 mmhg or more is achieved. Unlike the case of sealing with, the holes 5 included in the cross section of the core material 2 are not crushed, and the heat insulating effect by maintaining the degree of vacuum and the heat insulating effect by maintaining the holes can be made compatible.

  In the obtained vacuum heat insulating material 1, a heat insulating heat insulating film layer 3 may be laminated on the surface of the outer gas barrier film 4. It can also be used as an interior material or an exterior material by laminating the heat insulating and heat insulating film layer 3.

  Light and thin, heat insulation, heat insulation, heat retention, antibacterial, durability, weather resistance, and vacuum insulation material 1 can be obtained, so conventional residential and architectural insulation materials, heat insulation structural parts, refrigerators, etc. It is suitable for applications such as heat insulating materials for home appliances, heat insulating materials for commercial use such as refrigerators and vending machines, and heat insulating materials for automobiles. As new applications, it can be applied to antibacterial / heat insulation sheets (for roofs, indoor ceilings, etc.), antibacterial / condensation prevention structural materials, antibacterial / heat insulation / heat insulation containers, and livestock / foot-and-mouth disease response materials.

  The inventor manufactured a sample of the vacuum heat insulating material shown in FIG. 1, and conducted a heat insulation evaluation test of the comparative product and the product of the present invention. As a comparative product, a foamed urethane heat insulating material having a thickness of 10 mm was used. In the vacuum heat insulating material shown in FIG. 1, a kneaded aqueous solution was applied once on both surfaces of a core material (foamed polystyrene) having a thickness of 3 mm and dried sequentially to form a heat insulating heat insulating film layer having a dry thickness of 100 μm on both surfaces. The kneaded aqueous solution was stirred at a ratio of 50 parts by weight of water and 50 parts by weight of water-soluble epoxy resin with respect to 100 parts by weight of the ceramic balloon particles to obtain a primary kneaded product, and 30 parts by weight of titanium oxide was added to 100 parts by weight of the primary kneaded product. Stirring at a ratio yielded the final kneaded aqueous solution. A core material having a heat insulating and heat insulating layer formed on both sides was put in a gas barrier film and sealed under a low vacuum of 475 mmhg (Example 1). The thickness of the obtained vacuum heat insulating material was 1 mm.

  When the comparative product (urethane foam heat insulating material) and the vacuum heat insulating material of Example 1 were installed indoors, each was irradiated with a heat source at 60 ° C. for 0.5 hour, and the back surface temperature of the sample was measured, the comparative product was 70.5. In contrast, the vacuum heat insulating material of Example 1 was 38.5 ° C., 32.0 ° C. lower than the comparative product, and the heat insulating effect of the invention product was higher than that of the comparative product. Moreover, the vacuum heat insulating material of Example 1 was sufficiently provided with the flexibility which can be bent.

  The vacuum heat insulating material according to the present invention is a heat insulating material for houses and buildings, a heat insulating structural component, a heat insulating material for household appliances such as a refrigerator, a heat insulating material for commercial use such as a refrigerator / freezer / vending machine / food tray, a heat insulating material for automobiles, etc. It can be used for

DESCRIPTION OF SYMBOLS 1 Vacuum heat insulating material 2 Core material 3 Heat insulation heat insulating film layer 3A Surface layer part 3B Inner layer part 4 Gas barrier film 5 Hole 10 Kneading aqueous solution 11 Balloon particle 12 Water-soluble resin (water-soluble resin binder)
DESCRIPTION OF SYMBOLS 13 Thermal insulation pigment 14 Water 15 Primary kneaded material 16 Balloon particle and thermal insulation pigment combination 100 Vacuum packaging machine 101 Base 102 Upper member 103,106 Rubber seal part 104 Heater part 105 O-ring 107 Vacuum drawing pipe

Claims (9)

  A heat-insulating and heat-insulating film layer in which a large number of heat-shielding pigments and balloon particles are arranged using a water-soluble resin as a heat-shielding binder is formed on at least one surface of a deformable flexible and heat-insulating core material. Is sealed in a bag-like gas barrier film under a vacuum degree of 950 mmhg or less.   The vacuum heat insulating material according to claim 1, wherein the degree of vacuum is 450 mmhg to 750 mmhg.   The vacuum heat insulating material according to claim 1 or 2, wherein the heat insulating and heat insulating film layer is formed around the core material.   The vacuum heat insulating material according to any one of claims 1 to 3, wherein the core material after sealing has a thickness of 20 µm to 10 mm.   The vacuum heat insulating material according to any one of claims 1 to 4, wherein a dry thickness of the heat insulating and heat insulating film layer is 100 to 3000 µm.   The vacuum heat insulating material according to any one of claims 1 to 5, wherein titanium oxide or iron chrome is used as the heat shielding pigment.   A kneaded aqueous solution containing a large number of ceramic or glass balloon particles coated with a water-soluble resin on at least one surface of a deformable flexible and heat-insulating core material and a heat-shielding pigment coated with a water-soluble resin Is applied to the core material and dried to form a heat-insulating and heat-insulating coating layer in which a large number of heat-shielding pigments and balloon particles are arranged using a water-soluble resin as a heat-insulating binder on at least one side of the core material, A vacuum heat insulating material manufacturing method comprising: storing in a gas barrier film and sealing under a vacuum degree of 950 mmhg or less.   A large number of ceramic or glass-based balloon particles having a specific gravity of less than 1 coated with a water-soluble resin on at least one surface of a deformable flexible and heat-insulating core, and a specific gravity of less than 1 using a water-soluble resin as a binder A kneaded aqueous solution containing a large number of balloon particles / heat shielding pigments combined with ceramic or glass-based balloon particles and a heat shielding pigment having a specific gravity of more than 1 is applied and dried, on at least one side of the core material, A large number of balloon particles / heat-shielding pigment assemblies in which balloon particles and a heat-shielding pigment are bonded with water-soluble resin as a heat-shielding binder are arranged on the surface layer portion, and a large number of balloon particles are arranged on the inner layer portion with a water-soluble resin as a binder. Forming a heat-insulating and heat-insulating coating layer, storing the concentric material in a bag-like gas barrier film, and sealing under a vacuum of 950 mmhg or less Manufacturing method of the vacuum heat insulating material according to symptoms.   In obtaining the kneaded aqueous solution, 10 to 55% by weight of water and 10 to 80% of the water-soluble resin are kneaded with respect to 100% by weight of the balloon particles to obtain a primary kneaded aqueous solution. The method for producing a vacuum heat insulating material according to claim 7 or 8, wherein 1 to 80 wt% is kneaded to obtain a final kneaded aqueous solution.