CN101910702A - Core material for vacuum insulation material, vacuum insulation material, and processes for producing these - Google Patents

Core material for vacuum insulation material, vacuum insulation material, and processes for producing these Download PDF

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Publication number
CN101910702A
CN101910702A CN2008801223902A CN200880122390A CN101910702A CN 101910702 A CN101910702 A CN 101910702A CN 2008801223902 A CN2008801223902 A CN 2008801223902A CN 200880122390 A CN200880122390 A CN 200880122390A CN 101910702 A CN101910702 A CN 101910702A
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China
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nonwovens
core material
many
heat insulation
vacuum heat
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CN2008801223902A
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CN101910702B (en
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内田武
大堀进一
寺尾知之
上野浩义
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Sharp Corp
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Sharp Corp
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/02Layered products essentially comprising sheet glass, or glass, slag, or like fibres in the form of fibres or filaments
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/067Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of fibres or filaments
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022Non-woven fabric
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/14Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by a layer differing constitutionally or physically in different parts, e.g. denser near its faces
    • B32B5/142Variation across the area of the layer
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00Thermal insulation in general
    • F16L59/06Arrangements using an air layer or vacuum
    • F16L59/065Arrangements using an air layer or vacuum using vacuum
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10Inorganic fibres
    • B32B2262/101Glass fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/30Properties of the layers or laminate having particular thermal properties
    • B32B2307/304Insulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00Buildings or parts thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2607/00Walls, panels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2201/00Insulation
    • F25D2201/10Insulation with respect to heat
    • F25D2201/14Insulation with respect to heat using subatmospheric pressure

Abstract

A core material for vacuum insulation materials which is capable of attaining an improvement in heat-insulating performance exceeding a conventional improvement limit and has excellent heat-insulating performance; a vacuum insulation material employing the core material; and processes for producing these. The core material for vacuum insulation materials (100) is a core material for vacuum insulation materials which has been obtained by superposing nonwoven fabrics (110). Each nonwoven fabric (110) comprises glass fibers (111 and 112) produced by the continuous filament method. In each nonwoven fabric (110), most (111 and 112) of the glass fibers (111 and 112) extend in directions almost parallel to the surfaces of the nonwoven fabric (110).

Description

Vacuum heat insulation material core material, vacuum heat insulation material and manufacture method
Technical field
The present invention relates to vacuum heat insulation material core material, vacuum heat insulation material and their manufacture method.
Background technique
In the past, in the refrigerator that is used for various food are heated, cool off, are incubated and use, cooler bin, HEATING BOX etc., used thermal-protective material with various structures or performance.Because among thermal-protective material, the heat-shielding performance of vacuum heat insulation material is good, so vacuum heat insulation material is widely used in the heat insulation equipment such as household refrigerator of needs.Generally, outsourcing material is sealed, and make the inside of outsourcing material remain in decompression state, thereby can obtain vacuum heat insulation material by after the core material that is made of inorganic material is filled into the inside of outsourcing material.In inorganic material, the glass wool that adopts the glass fibre by flame method or centrifuge method manufacturing to constitute forms the core material of above-mentioned vacuum heat insulation material.
For example the vacuum heat insulation material of patent documentation 1 (Japan Patent open communique spy open 2005-265038 number) record is the glass wool that is made of the glass fibre as inorfil to be carried out wet type manufacture paper with pulp, and with many stacked then uses of inorfil thin slice that obtain as core material, particle diameter is that the above particle of 30 μ m contains ratio below 0.1 quality % in the inorfil, average fibre diameter in the inorfil is 0.2~6 μ m, and inorfil is arranged with respect to the sheet surface along continuous straight runs.
In addition, the vacuum heat insulation material of patent documentation 2 (Japan Patent open communique spy open 2006-17169 number) record constitutes glass wool by the glass fibre as the inorfil stacking material, core material is made of this glass wool, in outsourcing material inside, the density of the core material in the vacuum heat insulation material is 200~270kg/m the core material reduced pressure sealing 3, open core material behind the outsourcing material and include the glass fibre of length of staple more than 100 μ m more than 75%.
Summary of the invention
Fig. 6 represents in the past as in the used glass wool of vacuum heat insulation material core material the schematic plan of the distribution of glass fibre.Fig. 7 is plane electronics photomicrograph (100 times of a magnification factor), expression is in the past as in the used glass wool of vacuum heat insulation material core material, distribution before glass fibre is compressed, Fig. 8 is the section electron micrograph (100 times of magnification factors) of expression same distribution state.
As shown in Figure 6, in glass wool 500, the many glass fibres 510 of various length of staple extend random distribution on all directions as can be seen.In addition, as shown in Figure 7 and Figure 8, in the glass wool that utilizes flame method or centrifuge method to make, with respect to main fibre sneaked into length of staple at short fibre below the 1mm or fiber diameter the microfibre below 1 μ m.Above-mentioned short fibre or microfibre are filled between the main fibre, perhaps interweave between main fibre, produce transmission of heat between fiber, can think that institute is so that the heat-shielding performance reduction owing to cause transmission of heat along the core material thickness direction.In addition, in above-mentioned glass wool, main fibre also includes the fiber of a large amount of bendings or distortion as can be seen.
Owing to constitute glass wool in the above described manner, so as patent documentation 1 (Japan Patent open communique spy open 2005-265038 number) record, when utilizing wet type to manufacture paper with pulp to form thin slice, even want glass fibre is arranged in the horizontal direction with respect to sheet surface, also be difficult to arrange most glass fibre.
In addition, as patent documentation 2 (Japan Patent open communique spy open 2006-17169 number) record, even push glass wool, making the core material density of the glass fibre of length of staple more than 100 μ m that includes more than 75% is 200~270kg/m 3, also be difficult to arrange most glass fibre.
Therefore, the core material of the vacuum heat insulation material of above-mentioned communique record all is difficult to prevent because of producing the heat-shielding performance reduction that transmission of heat causes between the fiber.The thermal conductivity of the vacuum heat insulation material that obtains is limited so utilization improvement way in the past improves the heat-shielding performance of vacuum heat insulation material about 2mW/mk.
So, the object of the present invention is to provide a kind of vacuum heat insulation material core material, its good heat-shielding performance can surmount any improvement of in the past the thermal insulation the subject of knowledge and the object of knowledge being done, and has the vacuum heat insulation material of this core material and their manufacture method.
The present inventor is in order to solve the problem of the core material existence that vacuum heat insulation material adopted in the past, carried out wholwe-hearted research repeatedly, it found that: by constituting vacuum heat insulation material with in the fiber of core material, include at least and utilize many inorfils of continuous filament method manufacturing just can realize above-mentioned purpose.Wherein, so-called continuous filament method is a kind of fibre manufacture, by making the molten glass lining nozzle of flowing through, and flow out continuously, stretching, Fibrotic operation, generate continuous fiber.Based on above-mentioned discovery, vacuum heat insulation material of the present invention has following feature with core material.
Vacuum heat insulation material of the present invention with core material by many stacked the forming of nonwovens.Nonwovens comprises many inorfils that utilize continuous filament method to make at least.In nonwovens, the most of inorfil in many inorfils with the surperficial substantially parallel direction of nonwovens on extend.
Adopt the continuous filament method very little plurality of fibers of producd fibers diameter difference in a large number.In addition, utilize each fiber straightness accuracy of the inorfil that continuous filament method makes very high.Therefore, by many inorfils that utilize the continuous filament method manufacturing are cut into certain substantially length, can be under the very high state of straightness accuracy, obtain many inorfils of the very little and same length of fiber diameter difference.
At least include many inorfils that utilize continuous filament method to make owing to constitute the nonwovens of core material of the present invention, so when using above-mentioned many inorfils to form nonwovens, if each inorfil is arranged on the surperficial parallel direction with respect to nonwovens, can easily arrange many inorfils so that most inorfil with the surperficial substantially parallel direction of nonwovens on extend.At this moment, though most many inorfils with the surperficial substantially parallel direction of nonwovens on extend, be not to be closely arranged in mutually on the parallel direction, but in the plane that forms nonwoven surface towards the random direction dispersed arrangement.Therefore, can reduce the inorfil that is filled between many inorfils that constitute core material as far as possible, and can reduce the inorfil that interweaves between many inorfils as far as possible, so can prevent between inorfil, to produce transmission of heat.Thus, by preventing to produce transmission of heat along the core material thickness direction, the thermal conductivity of core material is reduced, the vacuum heat insulation material that obtains has good heat-shielding performance with core material, and surmounts any improvement of in the past the thermal insulation the subject of knowledge and the object of knowledge being done.
With in the core material, preferably: the fiber diameter of inorfil is more than the 3 μ m, below the 15 μ m, and the average fiber length of inorfil is more than the 3mm, below the 15mm at vacuum heat insulation material of the present invention.In this case, the thermal conductivity of core material can be reduced to greatest extent, thereby the vacuum heat insulation material core material of good heat-shielding performance can be obtained having.
With in the core material, preferably: inorfil is a glass fibre at vacuum heat insulation material of the present invention.In this case, because other inorfils of thermal conductivity ratio of glass fibre are little, for example little than ceramic fiber, so, can further improve the heat-shielding performance of core material by reducing the thermal conductivity of material itself.
Vacuum heat insulation material of the present invention comprises outsourcing material and is housed in the core material of outsourcing material inside.The inside of outsourcing material can remain in decompression state.Core material comprises the vacuum heat insulation material core material with above-mentioned any one feature.
Vacuum heat insulation material of the present invention comprises the steps: to use at least many inorfils utilizing the continuous filament method manufacturing, utilizes wet type to copy the step that the paper method is made nonwovens with the manufacture method of core material, in described step, make in many inorfils most of inorfil with the surperficial substantially parallel direction of the nonwovens of making on extend; Many nonwovens are carried out stacked step.
With in the manufacture method of core material, use many inorfils that utilize continuous filament method to make at vacuum heat insulation material of the present invention at least.When using above-mentioned many inorfils to utilize wet type to copy the paper method when making nonwovens, if each inorfil is arranged on the parallel direction with respect to the surface of nonwovens, then can easily arrange many inorfils so that most inorfil with the surperficial substantially parallel direction of nonwovens on extend.
At this moment, most many inorfils with the surperficial substantially parallel direction of nonwovens on extend, but be not closely to be arranged on the parallel direction mutually, but in the plane that forms nonwoven surface towards the random direction dispersed arrangement.Thus, even stacked many nonwovens in order to constitute core material, owing to can reduce the inorfil that is filled between many inorfils as far as possible, and can reduce the inorfil that interweaves between many inorfils as far as possible, produce transmission of heat so can prevent to be arranged between the inorfil on the substantially parallel direction with nonwoven surface.
Thus, by prevent to produce transmission of heat as far as possible along the core material thickness direction, the thermal conductivity of core material is reduced, thereby can obtain having the vacuum heat insulation material core material of excellent adiabatic capacity, this good heat-shielding performance can surmount any improvement of in the past the thermal insulation the subject of knowledge and the object of knowledge being done.
The manufacture method of vacuum heat insulation material provided by the invention comprises the steps: to use at least many inorfils utilizing the continuous filament method manufacturing, utilizes wet type to copy the step that the paper method is made nonwovens, in described step, the most of inorfil in many inorfils is extended on the direction substantially parallel with the nonwoven surface of making; Many nonwovens are carried out stacked step; And many nonwovens after stacked are housed in the inside of outsourcing material and make the inside of outsourcing material remain in the step of decompression state.
The manufacture method of vacuum heat insulation material provided by the invention comprises the steps: to use at least many inorfils utilizing the continuous filament method manufacturing, utilizes wet type to copy the step that the paper method is made nonwovens, in described step, the most of inorfil in many inorfils is extended on the direction substantially parallel with the nonwoven surface of making; Many nonwovens are carried out stacked step; Remove the step of the tackiness agent that many nonwovens comprised after stacked; And many nonwovens will having removed tackiness agent are housed in the inside of outsourcing material and make the inside of outsourcing material remain in the step of decompression state.
In the manufacture method of vacuum heat insulation material of the present invention, use many inorfils that utilize continuous filament method to make at least.When using above-mentioned many inorfils to utilize wet type to copy the paper method when making nonwovens, if each inorfil is arranged on the surperficial parallel direction with respect to nonwovens, then can easily arrange many inorfils so that most inorfil with the surperficial substantially parallel direction of nonwovens on extend.At this moment, though most many inorfils are not closely to be arranged on the parallel direction mutually extending with the surperficial substantially parallel direction of nonwovens, but in the plane of formation nonwoven surface towards the random direction dispersed arrangement.Thus, even stacked many nonwovens in order to constitute core material, but owing to can reduce the inorfil that is filled between many inorfils as far as possible, and can reduce the inorfil that interweaves between many inorfils, so can prevent between inorfil, to produce transmission of heat as far as possible.By many nonwovens after stacked are housed in the inside of outsourcing material, and make the inside of outsourcing material remain in decompression state, can make vacuum heat insulation material.Like this, by preventing to produce transmission of heat along the core material thickness direction, the thermal conductivity of core material is reduced, thereby can obtain having the vacuum heat insulation material of excellent adiabatic capacity, this good heat-shielding performance can surmount any improvement of in the past the thermal insulation the subject of knowledge and the object of knowledge being done.
As mentioned above, according to the present invention, by using many inorfils that utilize continuous filament method to make at least, the thermal conductivity of core material is reduced, thereby the vacuum heat insulation material that can obtain having excellent adiabatic capacity is with core material and vacuum heat insulation material with this core material, and described good heat-shielding performance can surmount any improvement of in the past the thermal insulation the subject of knowledge and the object of knowledge being done.
Description of drawings
Fig. 1 is the sectional view that schematically illustrates one embodiment of the present invention, (A) configuration of expression core material and outsourcing material, and (B) after the inner pressure relief of expression outsourcing material, the state of vacuum heat insulation material inside.
Fig. 2 is the stereogram that schematically illustrates one embodiment of the present invention, (A) configuration of expression core material and outsourcing material, and (B) after the inner pressure relief of expression outsourcing material, the state of vacuum heat insulation material inside.
Fig. 3 is the plan view of one embodiment of the present invention, schematically illustrates the distribution of the glass fibre of the nonwovens that core material adopted that constitutes vacuum heat insulation material.
Fig. 4 is the plane electronics photomicrograph (100 times of magnification factors) of expression one embodiment of the present invention, and expression constitutes the preceding distribution of glass fibre compression of the nonwovens that core material adopted of vacuum heat insulation material.
Fig. 5 is the section electron micrograph (100 times of magnification factors) of expression one embodiment of the present invention, and expression constitutes the preceding distribution of glass fibre compression of the nonwovens that core material adopted of vacuum heat insulation material.
Fig. 6 schematically illustrates in the past in the glass wool that core material adopted as vacuum heat insulation material the plan view of the distribution of glass fibre.
Fig. 7 is plane electronics photomicrograph (100 times of a magnification factor), and expression is in the past in the glass wool that core material adopted as vacuum heat insulation material, the distribution before the glass fibre compression.
Fig. 8 is section electron micrograph (100 times of a magnification factor), and expression is in the past in the glass wool that core material adopted as vacuum heat insulation material, the distribution before the glass fibre compression.
Description of reference numerals
1 vacuum heat insulation material, 100 core materials, 200 outsourcing materials
110 nonwovens, 111,112 glass fibres
Embodiment
With reference to the accompanying drawings embodiments of the present invention are described below.
Fig. 1 is the sectional view that schematically illustrates the vacuum heat insulation material structure of one embodiment of the present invention, the state before (A) expression outsourcing material inner pressure relief of Fig. 1, the state after (B) expression outsourcing material inner pressure relief of Fig. 1.
As shown in Figure 1, in vacuum heat insulation material 1, core material 100 is housed in the inside of outsourcing material 200, and described outsourcing material 200 has barrier properties for gases and forms a bag shape.
Shown in Fig. 1 (A), core material 100 is laminated by many nonwovens 110.Each layer nonwovens 110 uses glass fibre and a spot of organic bond of one of inorfil, and utilization is copied the paper method and made.Tackiness agent also can use inorganic bond, if but use inorganic bond, then the crooked ductility of fiber assembly is relatively poor, promptly, the crooked ductility of nonwovens 110 is relatively poor, in addition, and under situation about using as product, because the cost that uses inorganic bond is than the cost height that uses organic bond, so preferably use organic bond.In addition, to control the amount of tackiness agent not excessive as far as possible.
Shown in Fig. 1 (B), after the inner pressure relief of outsourcing material 200, utilize outsourcing material 200 atmosphere outside to press core material 100 is compressed, many nonwovens 110 that constitute core material 100 are extruded and contact.Under the state after the inner pressure relief of outsourcing material 200, the density of core material 100 is at 100~400kg/m 3Scope in.
Constitute nonwovens in the above described manner, and constitute core material nonwovens is stacked, again core material is configured in the inside of outsourcing material and reduces pressure, constitute vacuum heat insulation material.
Fig. 2 is the stereogram that schematically illustrates one embodiment of the present invention, (A) configuration of expression core material and outsourcing material, and (B) after the inner pressure relief of expression outsourcing material, the state of vacuum heat insulation material inside.A part of only having represented each nonwovens, core material, outsourcing material respectively.
Shown in Fig. 2 (A), stacked many nonwovens 110, form core material 100.Core material 100 is covered by outsourcing material 200.Outsourcing material 200 has barrier properties for gases and forms a bag shape, covers whole core material 100.
Shown in Fig. 2 (B), if reduced pressure in the inside of the outsourcing material 200 of bag shape, then core material 100 is compressed.If core material 100 is compressed, many nonwovens 110 mutual extrusion and contacting then.
The present inventor is for the heat-shielding performance of the vacuum heat insulation material that improves said structure, carried out wholwe-hearted research, it found that by use to have the nonwovens of inorfil of specified conditions as core material, significantly improve the heat-shielding performance of vacuum heat insulation material, thereby realized the present invention.
So as shown in Figure 1, nonwovens 110 of the present invention constitutes the core material 100 that vacuum heat insulation material 1 is adopted, and includes many inorfils that utilize continuous filament method to make at least.
In addition, as shown in Figure 1, vacuum heat insulation material 1 of the present invention comprises outsourcing material 200 and is housed in the core material 100 of outsourcing material 200 inside that outsourcing material 200 can keep its inside to be in decompression state, constitutes core material 100 by stacked nonwovens 110.Nonwovens 110 includes many inorfils that utilize continuous filament method to make at least.
Inorfil can exemplify glass fibre, ceramic fiber, rock wool fibers etc., in order to constitute core material of the present invention, need the thin fiber of diameter, from the thin fiber of the described diameter of a large amount of productions so that with the viewpoint of lower price circulation and from the little viewpoint of the thermal conductivity of material itself, inorfil preferably uses glass fibre.
In an embodiment of the invention, use cut into certain-length glass fibre, utilize nonwovens that wet type copies the paper manufactured to use as the core material of vacuum heat insulation material.Wherein, the glass fibre that what is called cuts into certain-length is meant and utilizes continuous filament method that molten glass is pulled out and is shaped from a plurality of nozzles, the glass fibre as thread continuous fiber of hundreds of~thousands of even thickness tied together be wound in precursor, utilize guillotine cutting machine etc. that this precursor is cut into specific length.The precursor that cuts into the glass fibre after the specific length is like this called fiberglas chopped strand.
Because the glass fibre that obtains like this is with certain size continuous fiber to be cut into specific length, thus this glass fibre fiber that to be straightness accuracy high and rigidity is big, and have substantially the uniform fibers diameter and be roughly circular section.That is, adopt the continuous filament method very little plurality of fibers of producd fibers diameter difference in a large number.In addition, utilize each fiber straightness accuracy of the inorfil that continuous filament method makes very high.Therefore, by many inorfils that utilize the continuous filament method manufacturing are cut into certain substantially length, can under the very high state of straightness accuracy, obtain the many inorfils that fiber diameter difference is very little and length is identical substantially.
Therefore, using this glass fibre to utilize wet type to copy under the situation of paper manufactured nonwovens, can obtain following nonwovens: promptly, though fiber extends fiber orientation random direction dispersed arrangement in the plane that forms nonwoven surface on the direction parallel with the surface cardinal principle of nonwovens.
Fig. 3 is the plan view of one embodiment of the present invention, schematically illustrates the distribution of the glass fibre of the nonwovens that core material adopted that constitutes vacuum heat insulation material.Fig. 3 is the nonwovens that expression is made of the layer glass layer of fibers.Fig. 4 is the plane electronics photomicrograph (100 times of magnification factors) of expression one embodiment of the present invention, distribution before the glass fibre compression of the nonwovens that core material adopted of expression vacuum heat insulation material, Fig. 5 is the section electron micrograph (100 times of magnification factors) of expression same distribution state.
As shown in Figure 3, many the glass fibres 111 that form the upper strata extend on the direction parallel with the surface cardinal principle of nonwovens 110 with many glass fibres 112 that form lower floor, but be not closely to be arranged on the parallel direction mutually, but dispersed arrangement become towards random direction in the plane that forms nonwovens 110 surfaces.In addition, as shown in Figure 4 and Figure 5, the straightness accuracy of each fiber is very high as can be seen.And, though most fiber with the substantially parallel direction in the surface of nonwovens on extend, in the plane that forms nonwoven surface towards the random direction dispersed arrangement.
As mentioned above, at least include many glass fibres that utilize continuous filament method to make owing to constitute the nonwovens 110 of core material of the present invention as one of inorfil, so when using above-mentioned many glass fibres to make nonwovens 110, if each glass fibre is arranged on the parallel direction with respect to the surface of nonwovens 110, then can easily arrange many glass fibres, so that most glass fibre 111,112 extends on the direction parallel with the surface cardinal principle of nonwovens.At this moment, though most many glass fibres 111,112 extend on the direction parallel with the surface cardinal principle of nonwovens 110, but be not closely to be arranged on the parallel direction mutually, but in the plane that forms nonwovens 110 surfaces towards the random direction dispersed arrangement.Owing to can reduce the glass fibre that is filled between many glass fibres that constitute core material, and can reduce the glass fibre that interweaves between many glass fibres, as far as possible as far as possible so can prevent between glass fibre, to produce transmission of heat.Therefore, by preventing to produce transmission of heat along the core material thickness direction, the thermal conductivity of core material is reduced, thereby the vacuum heat insulation material that can obtain having excellent adiabatic capacity is with core material and vacuum heat insulation material with this core material, and described good heat-shielding performance can surmount any improvement of in the past the thermal insulation the subject of knowledge and the object of knowledge being done.
Be not particularly limited the composition of glass fibre, can adopt C glass, D glass, E glass etc., but calm facile angle sets out, preferably adopt E glass (aluminium borosilicate glass).
As mentioned above, core material of the present invention is made by nonwovens, and the inorfil that forms this nonwovens is that continuous fiber is cut off the glass fibre with specific length form with given size, and this glass fibre straightness accuracy is high and have and be roughly circular section.Therefore, many glass fibres that disperse towards random direction are not limited to be arranged in parallel side by side, owing to be the some contact between each bar glass fibre, can significantly suppress the transmission of heat between the glass fibre.
Though also can consider to adopt other materials to come the instead of glass fiber, the general inorganic fibers such as alumina fibre chopped strand of alumina fibre that use are more expensive than glass fibre, and the thermal conductivity height, so be not preferable material.
In addition, the thermal conductivity of organic material is generally low than inorganic material, but does not have rigidity.Therefore, organic fibrous material makes fibre deformation at the position that fiber intersects because of external pressure, causes the face contact between the fiber or the minimizing of vacuum space ratio.Its result, core material adopts the vacuum heat insulation material of organic fiber owing to the thermal conductivity height, so be not preferable material.
In the mode of execution of vacuum heat insulation material of the present invention with the manufacture method of core material 100, at first, at least use many glass fibres that utilize continuous filament method to make, utilize wet type to copy the paper method and make nonwovens 110 as one of inorfil.Thus, the most of glass fibre 111,112 in many glass fibres is extended on the direction parallel with the surface cardinal principle of the nonwovens of making 110.Then, stacked many nonwovens 110.
In addition, in a mode of execution of the manufacture method of vacuum heat insulation material 1 of the present invention, at first, use many glass fibres that utilize continuous filament method to make at least, utilize wet type to copy the paper method and make nonwovens 110.Thus, the most of glass fibre 111,112 in many glass fibres is extended on the direction parallel with the surface cardinal principle of the nonwovens of making 110.Then, stacked many nonwovens 110.Then, many nonwovens 110 after stacked are housed in the inside of outsourcing material 200, make outsourcing material 200 inside remain in decompression state.
In a mode of execution of the manufacture method of vacuum heat insulation material of the present invention, use many glass fibres that utilize continuous filament method to make at least.When using above-mentioned many glass fibres, utilize wet type to copy the paper method when making nonwovens 110, if each glass fibre is arranged on the parallel direction with respect to the surface of nonwovens 110, then can easily arrange many glass fibres, so that most glass fibre 111,112 extends on the direction parallel with the surface cardinal principle of nonwovens 110.At this moment, though most many glass fibres 111,112 extend on the direction parallel with the surface cardinal principle of nonwovens 110, but be not closely to be arranged on the parallel direction mutually, but in the plane that forms nonwovens 110 surfaces towards the random direction dispersed arrangement.Therefore, even it is stacked many nonwovens 110 that are used to constitute core material 100, owing to can reduce the glass fibre that is filled between many glass fibres as far as possible, and can reduce the glass fibre that interweaves between many glass fibres, so can prevent between glass fibre, to produce transmission of heat as far as possible.In addition,, make the inside of outsourcing material 200 remain in decompression state, can make vacuum heat insulation material 1 by stacked many nonwovens 110 being housed in the inside of outsourcing material 200.Like this, owing to prevented to produce transmission of heat along core material 100 thickness directions, the thermal conductivity of core material 100 is reduced, thereby can obtain the vacuum heat insulation material 1 that has the core material 100 of excellent adiabatic capacity and have this core material 100, described good heat-shielding performance can surmount any improvement of in the past the thermal insulation the subject of knowledge and the object of knowledge being done.
Utilize wet type to copy the nonwovens 110 that the paper manufactured is made of glass fibre used in the present invention.Copy in the paper method in wet type,, make with certain-length and cut off the fiberglas chopped strand monofilamentization that glass fibre forms, and decentralized configuration becomes stratiform, can obtain the nonwovens 110 that constitutes by stranded less glass fibre by adding suitable dispersing agent.Therefore, parallel glass fibre dimension side by side is considerably less, and most glass fibre 111,112 is the some contact between adjacent fiber.Like this, have high compression-strength and the low-down nonwovens 110 of thermal conductivity on the thickness direction owing to can be manufactured on, so above-mentioned nonwovens 110 is suitable as the core material 100 of vacuum heat insulation material 1 very much.
In manufacture method of the present invention, adopt wet type to copy the paper method nonwovens 110 is manufactured paper with pulp, this known paper making machines such as to use fourdrinier paper machine, short net paper making machine, oblique net formula paper making machine of manufacturing paper with pulp.
Usually, the nonwovens that is made of glass fibre is used as thermal-protective material or the electrical insulator that has stable on heating thermal-protective material, has fireproof performance.Therefore, because need having, nonwovens can bear the intensity of pulling open or puncturing etc., so need be interweaved mostly between the fiber.The nonwovens that is made of the glass fibre that is used for such use utilizes mostly to be copied the paper manufactured and forms, and this is copied the paper method and uses fourdrinier paper machine, short net paper making machine.
And be housed in the inside of outsourcing material 200 as core material 100, so not too require the intensity of cloth by the nonwovens 110 that glass fibre used in the present invention constitutes.In addition, make the paper method of copying of fiber direction unanimity that the area of contact between the fiber is increased easily, so, be not preferred for making the nonwovens 110 that constitutes by glass fibre used in the present invention.On the other hand, in order to improve the heat-shielding performance of thickness direction, wish being interweaved less between the fiber.
Therefore, as the paper making machine that the nonwovens 110 that is made of glass fibre used in the present invention is manufactured paper with pulp, suitable use can be copied the oblique net formula paper making machine of paper with low input (inlet) concentration, but is not limited thereto.
As the fiberglas chopped strand of one of inorfil used in the present invention preferably: fiber diameter is that 3~15 μ m, length of staple are that the component ratio of glass fibre of 3~15mm is more than 99%.
As described below, can predict fiber diameter less than 3 μ m or length of staple fiberglas chopped strand less than 3mm, be not suitable for constituting the nonwovens 110 of vacuum heat insulation material of the present invention with core material 100.
Fiber diameter,, produces between fiber bending and the fiber and is interweaved when utilizing wet type to copy paper manufactured nonwovens because the rigidity of fiber is little less than the glass fibre of 3 μ m, and the area of contact between the fiber is increased.Transmission of heat increases thus, causes the heat-shielding performance variation of core material, so fiber diameter is not preferred less than the glass fibre of 3 μ m.
Copy paper method and make under the situation of nonwovens less than the glass fibre of 3mm utilizing wet type with length of staple, when making the fiber dispersion that is positioned at the upper strata on the fiber that has disperseed that is positioned at lower floor the time, the fiber on upper strata can not overlap with the fiber of lower floor, increased top fiber possibility with some supportings on lower floor's fiber, an end that for example it is contemplated that top fiber hangs down into lower floor, and the other end is to locate to the outstanding mode of thickness direction.Like this, when certain root fiber between the plurality of fibers when thickness direction overlaps, produce transmission of heat along the length of staple direction, and the area of contact between the fiber increases.Transmission of heat increases thus, makes the heat-shielding performance variation of core material, so length of staple is not preferred less than the glass fibre of 3mm.
If use the glass fibre of fiber diameter more than 15 μ m to constitute nonwovens, and many nonwovens are carried out the stacked core material that forms, then the fiber number of plies of core material on thickness direction reduces, heat conduction path on the thickness direction is shortened, and when forming nonwovens, it is big that the diameter of emptying aperture becomes.Therefore, owing to be subjected to the influence of gas conduction coefficient, the heat-shielding performance of core material is reduced, so the glass fibre of fiber diameter more than 15 μ m is not preferred.
If use the glass fibre of length of staple more than 15mm, crooked easily then because length of staple is excessive with respect to fiber diameter so the rigidity of fiber reduces, and produce being interweaved between the fiber, the area of contact between the fiber is increased.Therefore, because transmission of heat increases, make the heat-shielding performance variation of core material, so the glass fibre of length of staple more than 15mm is not preferred.
Vacuum heat insulation material of the present invention with the nonwovens that constitutes by glass fibre that core material adopted in, do not have the combination force between the fiber.Therefore, in order to prevent that in the manufacturing process of nonwovens glass fibre from coming off, and, in machine hand's preface, need to use organic bond in order to prevent that in the manufacturing procedure of subsequent handling shape is at random.Yet, because nonwovens finally will be wrapped in inside by outsourcing material as the core material of vacuum heat insulation material, so need make the use amount of organic bond be restricted to bottom line.Binder content in the nonwovens that is made of glass fibre is preferably below 15 quality %.
Generally be to use sprayer etc. fluid binder atomisations such as resin emulsion, resin aqueous solutions as organic bond, add in the glass fibre.In manufacture method of the present invention, preferably granular or fibrous organic bond are mixed with fiberglas chopped strand, utilize wet type to copy the paper method and make nonwovens, the particularly preferred granular tackiness agent that is to use.
As having that fibrous organic bond can exemplify: PVA (polyvinyl alcohol) fiber, unhardened or semi-harden phenolic resin or the fibrous material after the thermoset resin fibresization such as acrylic resin, epoxy resin; The product after the thermoplastic resin fibreizations such as polyester resin, the polyester resin that does not extend, acrylic resin, polyethylene resin, ethylene-vinyl alcohol resin; Or using the fiber that is called as core sheath structure fiber etc. of above-mentioned thermoplastic resin, this fibrous inside (core) has the different composition of fusing point with outside (sheath), and the fusing point of outside (sheath) is low.
In addition, as powder of having that granular organic bond can exemplify: granular PVA, above-mentioned thermosetting resin or thermoplastic resin etc.
In addition, Ye Tai organic bond concentrates on around the crossover sites of many glass fibres easily because of surface tension.Therefore, even be in a state of contact between the adjacent glass fibre, also there is this contact position of adhesive coverage possibility on every side.Therefore, owing to can expect the transmission of heat of generation by tackiness agent, liquid organic bond is not preferred.
On the other hand, organic bond uses granular tackiness agent or fibre adhesive, these organic bonds are being disperseed to be blended in the fiberglas chopped strand, utilize wet type to copy under the situation of paper manufactured nonwovens, can think that most tackiness agent is positioned at beyond the fibre-contact point, and be overlapped between the fiber by organic bond.But above-mentioned overlap joint is extremely very thin, and it is very little to produce heat conducting possibility.Therefore, owing to can keep the excellent adiabatic capacity of core material, so organic bond preferably uses granular tackiness agent or fibre adhesive.
Vacuum heat insulation material of the present invention is with the grammes per square metre of the nonwovens that core material adopted is made of glass fibre, preferably 30~600g/m 2In the grammes per square metre of nonwovens less than 30g/m 2Situation under because the aperture diameter that exists in the nonwovens is big, so gas is big to the influence of thermal conductivity.Therefore, the heat-shielding performance of core material reduces, and the intensity of core material diminishes, so the grammes per square metre of nonwovens is less than 30g/m 2Be not preferred.On the other hand, if the grammes per square metre of nonwovens surpasses 600g/m 2, the drying efficiency when then making nonwovens owing to the use glass fibre reduces, and the productivity reduction, so be not preferred.
So-called grammes per square metre generally is meant the unit of measurement of paper thickness, represents the weight of every square metre paper, is also referred to as every square metre weight.Unit as the metering nonwoven thickness uses grammes per square metre herein, and this nonwovens is made of the glass fibre that utilizes wet type to copy the paper manufactured.
For example in the record of patent documentation 2 (Japan Patent open communique spy open 2006-17169 number), the average diameter that preferably constitutes the inorfils such as glass wool of vacuum heat insulation material core material is 1~5 μ m.And record, if the average diameter of this inorfil surpasses 5 μ m, the heat-shielding performance of the vacuum heat insulation material that then finally obtains itself reduces.The diameter of the inorfil of formation core material is more little, can improve the heat-shielding performance of vacuum heat insulation material really more.On the other hand, thin inorfil price height, and when utilizing wet type to copy paper manufactured nonwovens, have the shortcoming that dewatering efficiency reduces, productivity reduces.And in the present invention, about the adhering state between fiber parameters such as the fiber diameter of inorfil, length of staple and the fiber, by selecting to be used to improve the optimum condition of heat-shielding performance, even adopt the example of the bigger fiberglas chopped strand of fiber diameter, also can obtain heat-shielding performance far above the vacuum heat insulation material of vacuum heat insulation material in the past as inorfil.
In addition, even adopt the fiberglas chopped strand of fiber diameter less than 6 μ m, the increase rate of the vacuum heat insulation material heat-shielding performance that finally obtains is compared with the situation of the fiberglas chopped strand that adopts fiber diameter 10 μ m, also almost can ignore.Therefore, consider that from productivity, price, aspect of performance the fiber diameter of fiberglas chopped strand is 6~15 μ m preferably.Under the situation of the glass fibre that uses this scope, can obtain heat-shielding performance with suitable manufacture cost than in the past the high vacuum heat insulation material of vacuum heat insulation material.
Use has the core material of above-mentioned feature, can utilize known method to make vacuum heat insulation material of the present invention.Representative method is: in the structure of vacuum heat insulation material shown in Figure 11, core material 100 is housed in 200 inside of the outsourcing material with barrier properties for gases that form bag shape.The outsourcing material 200 of accommodating core material 100 under decompression state has high gas-obstructing character, and the protective layer that has hot sealing layer and protect for crack etc., can make outsourcing material 200 inside remain in decompression state for a long time.In addition, also can be used as outsourcing material 200 to many pellicular cascades with above-mentioned characteristic.
Example as outsourcing material 200 concrete structures can exemplify: to make outermost surface be PETG (PET) resin, use ethylene-vinyl alcohol copolymer resin with aluminium-vapour deposition layer in the mesosphere, innermost layer is for using the gas barrier film of high-density polyethylene resin; Perhaps outermost surface uses nylon, mesosphere to use aluminium-vapour deposition PET resin and aluminium foil is two-layer, innermost layer is for the gas barrier film that uses high-density polyethylene resin etc.
In addition, for the initial heat-shielding performance that keeps vacuum heat insulation material and heat-shielding performance as time passes, preferably at sorbents such as the inner using gases sorbent of vacuum heat insulation material, moisture adsorbent.
In the present invention, before carrying out above-mentioned vacuum seal,, can further improve heat-shielding performance by removing or reduce the organic bond of core material.Use at tackiness agent under the situation of thermosetting resin adhesives such as acrylic resin, can utilize the method for thermolysis to remove tackiness agent.
That is, before core material is sealing into outsourcing material inside,, can utilize thermolysis only binder removal by under the heat decomposition temperature height of specific viscosity mixture and low-melting temperature, handling than glass fibre.In addition, use at tackiness agent under the situation of water-soluble resin tackiness agents such as PVA, except said method, can remove or reduce tackiness agent by cleaning with warm water etc.
Embodiment
Below several embodiments of the present invention are described, but the present invention is not limited thereto.
Embodiment 1
Fiberglas chopped strand with fiber diameter shown in the table 1 and average fiber length (being オ one ウ エ Application ス コ one ニ Application グ company (Owens Corning Corporation) makes) is put in the water, the concentration that makes fiberglas chopped strand is 0.5 quality %, add the エ マ ノ one Application (Emanon as dispersing agent of 1 mass parts with respect to the fiberglas chopped strand of 100 mass parts, TM trade mark) 3199 (Kao Corp's manufacturings) are by stirring the slip that has prepared fiberglas chopped strand.
The slip of the fiberglas chopped strand that use obtains utilizes wet type to copy the paper method and manufactures paper with pulp, and has prepared reticulated work.Dilute with water acrylic emulsion (Dainippon Ink. ﹠ Chemicals Inc makes GM-4), so that the solid concentration of acrylic emulsion is 3.0 quality %, the reticulated work that obtains is contained be immersed in the liquid after this dilution, and the moisture that reticulated work absorbs adjusted, making reticulated work moisture quality is 200 quality % with respect to the glass fibre quality.After this, by making the reticulated work drying, make vacuum heat insulation material with nonwovens that core material adopted.The vacuum heat insulation material that obtains is 100g/m with the grammes per square metre of the nonwovens that core material adopted 2, it is 5.7 quality % that tackiness agent contains ratio.
Embodiment 2~8
Fiberglas chopped strand with fiber diameter shown in the table 1 and average fiber length (being オ one ウ エ Application ス コ one ニ Application グ company makes) is put in the water, the concentration that makes fiberglas chopped strand is 0.5 quality %, add the エ マ ノ one Application (Emanon as dispersing agent of 1 mass parts with respect to the fiberglas chopped strand of 100 mass parts, TM trade mark) 3199 (Kao Corp's manufacturings) are by stirring the slip that has obtained fiberglas chopped strand.
On the other hand, granular PVA shown in the table 1 (ユ ニ チ カ Co., Ltd. makes OV-N) or fibrous PVA (the Network ラ レ of Co., Ltd. makes VPB105-2) are put in the water, making its solid concentration is 10 quality %, has prepared granular or fibrous binder slurry by stirring.
Tackiness agent with respect to glass fibre to contain ratio as shown in table 1, in the slip of the fiberglas chopped strand that obtains, add granular or fibrous binder slurry, use utilizes wet type to copy the paper method to manufacture paper with pulp, prepared reticulated work by mixing the slip that obtains.After this, by making the reticulated work drying that obtains, prepared vacuum heat insulation material with nonwovens that core material adopted.It is as shown in table 1 that the vacuum heat insulation material that obtains contains ratio with the grammes per square metre of the nonwovens that core material adopted and tackiness agent.
Embodiment 9
Using vacuum heat insulation material with embodiment's 2 same procedure preparations with the nonwovens that core material adopted stacked 10, by heating 1 hour with 550 ℃ of temperature in electric furnace, making tackiness agent contain ratio is 0 quality %.
Comparative example 1
As the core material that vacuum heat insulation material adopted in the past, prepared the nonwovens of the laminar fiber assembly of conduct that constitutes by glass wool with fiber diameter shown in the table 1.
In addition, by vacuum heat insulation material with nonwovens that core material adopted with 600 ℃ of temperature heating 30 minutes, remove organic principle, utilize following formula to obtain the tackiness agent shown in the table 1 according to of poor quality before and after the heating and contain ratio.
Tackiness agent contains ratio (quality %)=[{ (quality before the heating)-(quality after the heating) }/(quality before the heating)] * 100
Come the stacked nonwovens of making by above embodiment 1~9 according to the number shown in " the stacked number of nonwovens " hurdle of table 1, make core material.Across separator, on the upper and lower surface of each core material that constitutes by the duplexer that obtains, apply 1kgf/cm respectively along thickness direction 2The pressure of (about 98kPa), in this state, maintaining degree of vacuum is the vacuum state of 0.01Torr (about 1.3Pa).In each core material under this maintenance vacuum steady state, the upper and lower surface temperature partly and the hot-fluid of each core material of flowing through by measuring each core material that is made of duplexer calculate thermal conductivity.The measurement result of the thermal conductivity that expression obtains in " thermal conductivity " hurdle of table 1.In addition, about comparative example 1, the thermal conductivity of the nonwovens that expression is made of in the past glass wool in " thermal conductivity " hurdle of table 1.
From the result shown in the table 1 as can be seen, the thermal conductivity of the vacuum heat insulation material of the embodiment of the invention is below 1.10mW/mk, compare with vacuum heat insulation material in the past as a comparative example, be worth quite for a short time, its good heat-shielding performance that has can surmount in the past any improvement that the thermal insulation the subject of knowledge and the object of knowledge is done.
Therefore, the vacuum heat insulation material of the application of the invention can provide the equipment such as refrigerator with excellent adiabatic capacity and energy-efficient performance.
More than disclosed mode of execution and embodiment be illustration, the present invention is not limited thereto.Scope of the present invention is not limited to the above-described embodiment and examples, but represents with claim, and comprises content and all modifications that carries out in the claim scope or the distortion that is equal to claim.
Industrial applicibility
Vacuum heat-barrier material of the present invention with core material and vacuum heat-barrier material by using at least many inorfils that utilize continuous filament method to make, the thermal conductivity factor of core material is reduced, has good heat-proof quality, surmount any improvement of in the past the thermal insulation the subject of knowledge and the object of knowledge being done, so be widely used in the heat insulation equipment such as domestic refrigerator of needs.

Claims (7)

1. a vacuum heat insulation material is laminated by many nonwovens (110) with core material (100), it is characterized in that,
Described nonwovens (110) comprises many inorfils (111,112) that utilize continuous filament method to make at least,
In described nonwovens, the most of inorfil (111,112) in described many inorfils (111,112) with the surperficial substantially parallel direction of described nonwovens (110) on extend.
2. vacuum heat insulation material according to claim 1 core material (100), it is characterized in that, the fiber diameter of described inorfil (111,112) is more than the 3 μ m, below the 15 μ m, and the average fiber length of described inorfil (111,112) is more than the 3mm, below the 15mm.
3. vacuum heat insulation material according to claim 1 is characterized in that with core material (100) described inorfil (111,112) is a glass fibre.
4. a vacuum heat insulation material (1) is characterized in that comprising:
Outsourcing material (200) and
Core material (100) is housed in the inside of described outsourcing material (200),
The inside of described outsourcing material (200) can remain in decompression state,
Described core material (100) comprises the described vacuum heat insulation material core material of claim 1.
5. the manufacture method of a vacuum heat insulation material usefulness core material (100) is characterized in that comprising the steps:
At least use many inorfils (111,112) utilize continuous filament method to make, utilize wet type to copy the step that the paper method is made nonwovens (110), in described step, make in described many inorfils (111,112) most of inorfil (111,112) with the surperficial substantially parallel direction of the described nonwovens of making (110) on extend;
Many described nonwovens (110) are carried out stacked step.
6. the manufacture method of a vacuum heat insulation material (1) is characterized in that comprising the steps:
At least use many inorfils (111,112) utilize continuous filament method to make, utilize wet type to copy the step that the paper method is made nonwovens (110), in described step, make in described many inorfils (111,112) most of inorfil (111,112) with the surperficial substantially parallel direction of the described nonwovens of making (110) on extend;
Many described nonwovens (110) are carried out stacked step; And
Many after stacked described nonwovens (110) are housed in the inside of outsourcing material (200) and make the inside of described outsourcing material (200) remain in the step of decompression state.
7. the manufacture method of a vacuum heat insulation material (1) is characterized in that comprising the steps:
At least use many inorfils (111,112) utilize continuous filament method to make, utilize wet type to copy the step that the paper method is made nonwovens (110), in described step, make in described many inorfils (111,112) most of inorfil (111,112) with the surperficial substantially parallel direction of the described nonwovens of making (110) on extend;
Many described nonwovens (110) are carried out stacked step;
Remove the step of the tackiness agent that many described nonwovens (110) after stacked are comprised; And
Many the described nonwovens (110) of having removed described tackiness agent are housed in the inside of outsourcing material (200) and make the inside of described outsourcing material (200) remain in the step of decompression state.
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