CN107791634A - Core, vacuum heat-insulating plate and the refrigerator of vacuum heat-insulating plate - Google Patents
Core, vacuum heat-insulating plate and the refrigerator of vacuum heat-insulating plate Download PDFInfo
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- CN107791634A CN107791634A CN201710799732.5A CN201710799732A CN107791634A CN 107791634 A CN107791634 A CN 107791634A CN 201710799732 A CN201710799732 A CN 201710799732A CN 107791634 A CN107791634 A CN 107791634A
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- Prior art keywords
- vacuum heat
- insulating plate
- core
- resin
- woven fabrics
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered 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
- B32B5/02—Layered 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
- B32B5/022—Non-woven fabric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/06—Arrangements using an air layer or vacuum
- F16L59/065—Arrangements using an air layer or vacuum using vacuum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/304—Insulating
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
- Laminated Bodies (AREA)
Abstract
The core of the vacuum heat-insulating plate of the present embodiment is the core for the vacuum heat-insulating plate that multiple non-woven fabrics are laminated, wherein, above-mentioned non-woven fabrics is made up of thermoset resin fibres, and the thermoset resin fibres are formed by thermosetting resin.
Description
Technical field
The present embodiment is related to the core, vacuum heat-insulating plate and refrigerator of vacuum heat-insulating plate.
Background technology
To for various machines, equipment vacuum heat-insulating plate for, require always high thermal insulation and further reduce thickness,
Weight.The core of existing vacuum heat-insulating plate is mainly what is formed by glass fibre.However, function as the glass fibers of these cores
For dimension, there is the problem of thickness for being difficult to reduce vacuum heat-insulating plate, weight is such than great in it.
Prior art literature
Patent document
Patent document 1：No. 4713566 specifications of Japanese Patent No.
The content of the invention
Invent problem to be solved
In order to solve the above problems, the core that vacuum heat-insulating plate is made up of resin fibre is considered in recent years.But resin
Fiber has the tendency of so that intensity becomes weaker than glass fibre.Therefore, when make the inside of vacuum heat-insulating plate for such as below 2Pa this
During the decompression state of sample, compressed, the sky of vacuum insulation intralamellar part due to intensity deficiency by the non-woven fabrics that resin fibre is formed
Gap rate reduces, and the mutual contact area of resin fibre increases and causes heat-transfer path increase, so as to cause heat-insulating property to drop
It is low.Therefore, in the case where forming non-woven fabrics by resin fibre, the technology for solving the problems, such as in its intensity is required always.
Therefore, for the present embodiment, its object is to：The situation for being just made up of non-woven fabrics resin fibre at last is provided
It can also ensure that the intensity of the resin fibre and core, the vacuum insulation of the vacuum heat-insulating plate of heat-insulating property reduction can be avoided
Plate and refrigerator.
The means used to solve the problem
The core of the vacuum heat-insulating plate of the present embodiment is the composition that multiple non-woven fabrics are laminated.Moreover, non-woven fabrics is
It is made up of thermoset resin fibres, the thermoset resin fibres are formed by thermosetting resin.
Brief description of the drawings
Fig. 1 is the core for the vacuum heat-insulating plate for representing embodiment and the schematic diagram of non-woven fabrics.
Fig. 2 is the schematic cross-sectional view for the vacuum heat-insulating plate for representing embodiment.
Fig. 3 is the three-dimensional exploded view of the schematically configuration example of the core of the vacuum heat-insulating plate of illustrated embodiment.
Fig. 4 is the side view of the schematically configuration example of the core of the vacuum heat-insulating plate of illustrated embodiment.
Fig. 5 is the schematic diagram of the side view of the core for the vacuum heat-insulating plate for representing embodiment.
Fig. 6 is the schematic diagram of the manufacture device of the core for the vacuum heat-insulating plate for representing embodiment.
Fig. 7 is the skeleton diagram for the physics value for representing solvent.
Fig. 8 is the figure contrasted to the embodiment of embodiment and the physical property of comparative example.
Fig. 9 is the schematic perspective view of the body of thermal insulating box for the refrigerator for representing embodiment.
Figure 10 is the schematic perspective view of the vacuum heat-insulating plate group for the refrigerator for representing embodiment.
Figure 11 is the sectional view for the state for illustrating the preceding vacuum heat-insulating plate with after decompression of decompression.
Symbol description
In accompanying drawing, 10 represent core, and 11 represent non-woven fabrics, and 12 represent resin fibre, and 14 represent vacuum heat-insulating plate, and 15 represent
Aluminium foil, 16 represent glass layer, and 22 represent spinneret head, and 23 represent pole plate, and 40 represent refrigerator.
Embodiment
Hereinafter, an embodiment of the core of vacuum heat-insulating plate, vacuum heat-insulating plate and refrigerator is carried out with reference to the accompanying drawings
Explanation.
As shown in figure 1, non-woven fabrics 11 is laminated for multilayer by core 10.The non-woven fabrics 11 is the resin formed by random interleaving
What fiber 12 was formed.Resin fibre 12 is formed by method of electrostatic spinning.The resin fibre 12 formed by method of electrostatic spinning is outer
More than 1000 times of the long fibre that footpath d is 1 μm of d ＜, length is external diameter.In addition, the resin fibre 12 is not linear on the whole,
But random bend form it is curly.Therefore, resin fibre 12 is easy to be interleaved with each other, and easily forms multilayer.By using quiet
Electrical spinning method, the spinning of resin fibre 12 and the formation of non-woven fabrics 11 can be carried out simultaneously.As a result, can be with compared with casual labourer when
It is readily formed core 10.
In addition, the resin fibre 12 of non-woven fabrics 11 is formed by using method of electrostatic spinning and it is easy to ensure that nanometer is to micron
Superfine external diameter.Therefore, the thickness of each of non-woven fabrics 11 becomes very thin, and the thickness of core 10 is also thinning.With regard to existing glass
For the situation of fiber, fibre length is short, and fiber is interlaced with one another few.Thus, when glass fibers are used, it becomes difficult to maintain nothing
Spin the shape of cloth.In addition, for the situation of glass fibre, it is difficult to while carry out spinning and the non-woven fabrics of glass fibre
Formed.In the case of using existing glass fibre, so that glass fibre is scattered in state to get according to copy paper of water
Form non-woven fabrics.If carrying out the spinning of glass fibre and the formation of non-woven fabrics simultaneously, then the big cotton like nonwoven of thickness can be formed
Cloth, it is difficult to form the small thin non-woven fabrics of thickness.
So, for the situation of present embodiment, core 10 is formed by non-woven fabrics 11, and the non-woven fabrics 11 is by being laminated
The multilayer formed is formed.The non-woven fabrics 11 of hundreds of layers to more than thousands of layers is for example laminated by core 10.The formation of present embodiment
Section is shaped generally as uniform circular or ellipse by the resin fibre 12 of non-woven fabrics 11.
The resin fibre 12 for forming non-woven fabrics 11 is formed by the density i.e. proportion organic based polymer smaller than glass.It is logical
Cross and resin fibre 12 is formed by the small polymer of density ratio glass, the lighting of resin fibre 12 can be realized.Non-woven fabrics 11 can
To carry out blending to two or more resin fibres 12.As an example of the non-woven fabrics 11 formed by blending, can use
Styroflex and aromatic polyamide system resin (registration mark：Kevlar (Kevlar)) etc..In addition, non-woven fabrics 11 except
Can also be by selected from makrolon, polymethyl methacrylate, polypropylene, polyethylene, poly terephthalic acid second two beyond above-mentioned
Alcohol ester, polybutylene terephthalate (PBT), polyamide, polyoxymethylene, polyamidoimide, polyimides, polysulfones, polyethers
Sulfone, PEI, polyether-ether-ketone, polyphenylene sulfide, Noryl, syndiotactic polytyrene, liquid crystal polymer, Lauxite,
A kind of resin fibre 12 in unsaturated polyester (UP), polyphenol, melmac, epoxy resin etc. is formed, or can also be by two
The blending of resin fibre 12 of the kind above is formed.
In this case, the resin fibre 12 of institute's blending is set in a manner of outside diameter d is 1 μm of d ＜.Pass through
Blending so is carried out to various kinds of resin fiber 12, thermal insulation, lighting and the raising of intensity of non-woven fabrics 11 can be realized.With regard to nothing
Spin for cloth 11, when the volume for being formed at the mutual space of the resin fibre 12 being interwoven becomes small, its space on the contrary
Quantity increase.The quantity in the mutual space of resin fibre 12 is more, then can more realize the raising of thermal insulation.Therefore,
Non-woven fabrics 11 preferably makes nanoscale as the fiber outer diameter d paths of its resin fibre 12 of composition to 1 μm of d ＜.Pass through this
Sample carries out path to the outside diameter d of resin fibre 12, be formed at the mutual space of resin fibre 12 volume diminish and
Quantity increase.By so carrying out path, the volume for being formed at the mutual space of the resin fibre 12 being interwoven becomes
Must be smaller, its quantity further increases, and can realize the raising of the thermal insulation of non-woven fabrics 11.
Here, above-mentioned Lauxite, unsaturated polyester (UP), polyphenol, melmac, epoxy resin are by applying heat
And the so-called thermoset resin material that can solidify.For present embodiment, wherein particularly preferably forming resin by epoxy resin
Fiber 12.In the case where the thermoset resin fibres to be formed by thermosetting resin are formed resin fibre 12, the resin fibre
12 curing agent that can be set as including the main material formed by thermoset resin material and solidifying the main material are formed.By right
The addition of curing agent is adjusted, and can control the characteristic of formed resin fibre 12, such as can control the hard of fiber
Degree, rigidity etc..
Resin fibre 12 is such as can add Si oxide, the hydroxide of metal, carbonate, sulfate, silicate
Various inorganic fillers.By so adding inorganic filler to resin fibre 12, the thermal insulation of non-woven fabrics 11 and real is able to maintain that
The raising of existing intensity.Specifically, as the inorganic filler added, can also use wollastonite, potassium titanate, eakleite,
Gypsum fiber, aluminium sheet, MOS (alkali magnesium sulfate), aramid fiber, carbon fiber, glass fibre, talcum, mica, glass flake etc..
As shown in Fig. 2 the core 10 formed by non-woven fabrics 11 is contained in bag-shaped outer packaging material 13.Outer packaging material 13 is, for example, to pass through
Make metal or metal oxide etc. be deposited in one layer or more than two layers resin film come make gas permeability disappear air-tightness piece
Material.Carried out to accommodating the outer packaging material 13 of core 10 together with core 10 after inner pressure relief to the pressure close with vacuum is made
Sealing.Thus, the outer packaging material 13 for accommodating core 10 is formed vacuum heat-insulating plate 14.In this case, the shape in order to mitigate
Into vacuum heat-insulating plate 14 pressed the skeleton structure as skeleton can be accommodated in the inner side of outer packaging material 13 across, vacuum heat-insulating plate 14
Part.
As shown in Figure 3 and Figure 4, the surface side that core 10 can also be after stacking possesses aluminium foil 15.Just as described above by nothing
Spin for the core 10 that cloth 11 is formed, after outer packaging material 13 is received into, depressurized by the inside of external packaging material 13 come shape
As vacuum heat-insulating plate 14.Therefore, vacuum heat-insulating plate 14 be possible to can occur due to the inner pressure relief of outer packaging material 13 pressure across, become
Shape.Possesses aluminium foil 15 by the surface side in non-woven fabrics 11, it is possible to increase the intensity of core 10.Thereby, it is possible to mitigate due to subtracting
Pressure and press across, deformation.In addition, core 10 can also possess the glass fibre being laminated together with non-woven fabrics 11 as shown in Figure 5
Layer 16.The intensity of glass layer 16 is higher than the non-woven fabrics 11 formed by fine resin fibre 12.Therefore, by being laminated non-woven fabrics
11 with glass layer 16, although thickness, weight with the situation of core 10 is only formed by non-woven fabrics 11 compared with increase, can subtract
Gently pressed due to decompression across, deformation.In addition, glass layer 16 is not limited to two layers shown in Fig. 5 or one layer or three
It is more than layer.
Next, the manufacture device and manufacture method for forming the non-woven fabrics 11 for forming above-mentioned core 10 are said
It is bright.
Fig. 6 is the schematic diagram for an example for representing manufacture device 20.Manufacture device 20 possesses Department of Transportation 21, spinneret head
22nd, pole plate 23, separation unit 24 and reeling end 25.Department of Transportation 21 has a pair of rolls 26 and roller 27.Set between the roller 26 and roller 27
It is equipped with the band 28 circulated.It is at least one by drive division revolution driving (not shown) in a pair of rolls 26 or roller 27.Thus, it is horizontal
Circulated across the band 28 between roller 26 and roller 27 by the revolution of roller 26 or roller 27.
Spinneret head 22 is arranged on the top of the Department of Transportation 21.Direct of travel of the spinneret head 22 along band 28 is configured with more
It is individual.In addition, spinneret head 22 be also configured with the depth direction that the direction vertical with direct of travel of band 28 is Fig. 6 it is multiple.This
Sample, spinneret head 22 the top of Department of Transportation 21 with it is rectangular be configured with it is multiple.Pole plate 23 is with relative with the spinneret head 22
Mode is set.Band 28 is sandwiched between spinneret head 22 and pole plate 23.Moreover, between the spinneret head 22 and pole plate 23 it is outer added with
Number more than kV high voltage.That is, between spinneret head 22 and pole plate 23, additional high voltage is passed through formed with electric field.
Separation unit 24 is arranged at downstream in the direct of travel of band 28.Separation unit 24 will be formed in the spinneret head 22 of band 28
The non-woven fabrics 11 of side separates from band 28.Reeling end 25 is set in a manner of adjacent with separation unit 24.Reeling end 25 is batched by dividing
The non-woven fabrics 11 separated from portion 24 by band 28.
For the resin of the raw material as the resin fibre 12 for forming non-woven fabrics 11, it is supplied with being dissolved in the state of solvent
It is given to spinneret head 22.That is, the resin as the raw material of resin fibre 12 is supplied to spinneret head 22 as a solution.Supply
Resin solution after to spinneret head 22 is sprayed with high pressure by spinneret head 22 towards band 28.Now, as described above in spinning head
Electric field is formd by high voltage between portion 22 and pole plate 23.The resin solution ejected by spinneret head 22 by increasing electricity outside
Press and miniaturization, but also with electric charge, therefore including fluctuating while randomly being inhaled from spinneret head 22 by electrostatic interaction
Guide to pole plate 23.In addition, next resin solution ejected at high pressure, when being sprayed by spinneret head 22, solvent gasifies.By
This, for the resin solution ejected by spinneret head 22, solvent gasifies during untill pole plate 23 is reached, and is formed
Band 28 is attached to for microfibre shape and with random shape.As a result, formed in the face of the side of spinneret head 22 of band 28 micro-
The non-woven fabrics 11 that fine fibre is randomly interwoven.Now, non-woven fabrics 11 is formed as what is ejected by multiple spinneret heads 22
The several layers of state being interwoven of resin fibre 12.
In addition, resin fibre 12 now with it is random and in a jumble be irregular state sprayed by spinneret head 22.Therefore, set
Fat fiber 12 brokenly circles round untill the band 28 for being sprayed by spinneret head 22 and reaching the side of pole plate 23, is formed on the whole not
For linear random coils shape.As a result, resin fibre 12 after reaching the band 28 of pole plate 23 side with irregular mutually and
The mode to interweave securely forms non-woven fabrics 11.In addition, resin fibre 12 is presented when being ejected by spinneret head 22 sometimes
It is spiral-shaped.The spiral-shaped resin fibre 12 more firmly interweaves with other resin fibres 12, is favorably improved non-woven fabrics
11 intensity.In addition, resin fibre 12 is continuously sprayed by spinneret head 22.Therefore, the resin fibre 12 formed is to by spraying
The injection on silk head 22 is shaped generally as untill terminating or a totally continuous fiber.As a result, resin fibre 12 is formed
The very long long fibre that fiber length for fiber is more than 1000 times relative to external diameter.Here, by thermoset resin fibres
In the case of forming resin fibre 12, make resin fibre 12 of the heat effect after non-woven fabrics 11 is formed as sheet.Thus, form
The thermoset resin material of resin fibre 12 solidifies.In addition, even if thermoset resin material is solidified, will not also lead
Resin fibre 12 is caused to stick each other.
In order to compare, for example, with regard to it is existing using flame method come for the glass fibre that is formed, its external diameter is 3~4 μm, and
Fibre length is 200 μm or so.In the case where the fiber length of fiber is short relative to external diameter, because chopped fiber can interweave each other,
Therefore the non-woven fabrics formed easily becomes loose, it is difficult to keeps dimensionally stable.On the other hand, when as present embodiment with
When method of electrostatic spinning is to form resin fibre 12, fiber will not interrupt and have continuous abundant length.Thus, just with Static Spinning
For the obtained resin fibre 12 of silk method, irregular shape caused by convolution during due to its length and as being formed, it not only can
It can also interweave in itself with other fiber interweavings and continuously.As a result, the resin fibre 12 obtained with method of electrostatic spinning passes through
The firm intertexture of one fiber in itself can also form non-woven fabrics 11.Thus, the resin fibre 12 of present embodiment and existing glass
Glass fiber compares the non-woven fabrics 11 that can form more stable shape.Further, since the dimensionally stable of non-woven fabrics 11, therefore formed
Can also be obtained during core 10 non-woven fabrics 11 stacking it is easily such the advantages of.
Movement of the non-woven fabrics 11 formed along band is moved to Fig. 6 left, and is separated by separation unit 24 by band 28.
The non-woven fabrics 11 is formed as continuous sheet during being sprayed by spinneret head 22 as the resin of raw material.Therefore, by band 28
The non-woven fabrics 11 separated is batched in reeling end 25 with the state of sheet.The non-woven fabrics 11 batched is cut into appropriate chi
It is very little, such as more than 100 are then laminated, is formed as core 10.
Furthermore, it is possible to implement the back tender for making solvent gasify and removing to the non-woven fabrics 11 as made from manufacture device 20
Sequence.The drying process is in the environment of obtained non-woven fabrics 11 is placed on into such as 50 DEG C~60 DEG C or so of set point of temperature, by
This removes the solvent residued in non-woven fabrics 11 as far as possible.Here, the feelings of resin fibre 12 are being made up of thermoset resin fibres
Under condition, the drying temperature in the drying process can be set in such as more than 100 DEG C.Therefore, water conduct has just been used at last
The situation of solvent, it can also carry out the removing of the solvent.
For the situation of the manufacture device 20 shown in Fig. 6, outside diameter d, the length of the resin fibre 12 of non-woven fabrics 11 are formed
According to the concentration for the resin solution for being supplied to spinneret head 22, injection pressure, applied between spinneret head 22 and pole plate 23
Voltage, the distance of spinneret head 22 and pole plate 23, translational speed of band 28 etc. and change.These resin solutions supplied it is dense
Degree, injection pressure, additional voltage, the interval of spinneret head 22 and pole plate 23, band 28 translational speed etc. can be with institute's phase
Outside diameter d, the length of the resin fibre 12 of prestige are accordingly arbitrarily adjusted.
The solvent of dissolving resin can for example use the solvent shown in Fig. 7.That is, solvent use with as resin fibre 12
There is the solvent of compatibility between the resin of material.Solubility parameter (SP) and the SP of solvent as the resin of material is nearer
Seemingly, then compatibility is higher.Method of electrostatic spinning is accordingly to select compatibility height with the resin of the material as resin fibre 12
Solvent.For example, in the case of material of the selection polystyrene as resin fibre 12, the SP of polystyrene is 9.1.This
When, solvent preferably selects toluene that SP is 9.1 etc..In addition, for example make in the epoxy resin for being selected as thermoset resin material
In the case of material for resin fibre 12, solvent is preferably the DMF illustrated in Fig. 7.
In addition, in the case of using method of electrostatic spinning, boiling point, the dielectric constant of solvent are also selection key element.Resin by
Spinneret head 22 ejects, and is then formed as threadiness during untill pole plate 23 is reached.It is therefore desirable to solvent is extremely
Solution does not occur to evaporate and evaporate untill pole plate 23 is reached untill being sprayed by spinneret head 22.For example, when solvent
When boiling point is too low, can sprayed by spinneret head 22 and by applying high voltage before evaporate.Therefore, can be in resin fibre 12
Spinning before becoming sufficiently fine, it cannot get the resin fibre 12 of desired external diameter.In addition, when the boiling point of solvent is too high, solvent
Do not occur untill pole plate 23 is reached evaporate and residue in resin fibre 12.When such dissolvent residual is in resin fibre 12,
After vacuum heat-insulating plate 14 is formd, the steam of solvent is released by resin fibre 12 and the vacuum of vacuum heat-insulating plate 14 drops
It is low, cause thermal insulation to reduce.In addition, in dissolvent residual in the case of resin fibre 12, can cause to dry need the time or
Released during decompression of the steam of solvent when forming vacuum heat-insulating plate 14, the arrival time for reaching vacuum state elongated waits production effect
The reduction of rate.Therefore, the boiling point of solvent needs to be selected according to the characteristic of manufacture device 20.
Similarly, dielectric constant is also a big key element for being formed for resin fibre 12.As a rule, dielectric constant is big
Material have and be easy to the property of accumulated charge.Thus, it is easy to the big solvent of the dielectric constant of accumulated charge passes through applied to spray
Silk head 22 voltage and save electric charge, become easily to be attracted to pole plate 23 by electrostatic interaction.As a result, when normal using dielectric
When counting big solvent, there is the advantages of external diameter for being easy to fully reduce formed resin fibre 12 is such.It is in addition, fine with regard to resin
For dimension 12, make the resin solution after miniaturization on spinneret head 22 while by applying high voltage while sprayed, thus solvent
Generation is evaporated while trapping pole plate 23 by electrostatic interaction.Therefore, by improving the dielectric constant of solvent, comprising by spinneret
The solution for the resin that head 22 ejects strongly is moved to pole plate 23.As a result, when the dielectric constant of solvent is high, institute's shape
Into resin fibre 12 arresting efficiency improve.In addition, as described above, it is used as vacuum in the non-woven fabrics 11 and core 10 formed
Before heat-insulating shield is carried out decompression and vacuumized, drying process can also be included.The non-woven fabrics 11 that is formed, core 10 for example can be with
Be allowed to drying using heater meanses, or can by place preset during be allowed to drying.Thus, nothing will be residued in
The solvent removing of cloth 11, core 10 is spun, the vacuum of vacuum heat-insulating plate can be kept for a long time.
Then, based on Fig. 8 to having used the core 10 of the resin fibre 12 formed by method of electrostatic spinning of present embodiment
Comparison with the performance for the core for having used existing glass fibre illustrates.
Embodiment 1 to embodiment 3 has used the resin fibre 12 formed by method of electrostatic spinning of present embodiment to be used as structure
Into the non-woven fabrics 11 of core 10.And comparative example 1 has used existing glass fibre in core.In addition, comparative example 2 is in core
Resin fibre 12 has been used in the same manner as embodiment 1 to embodiment 3.Embodiment 1 and comparative example 2 have used polystyrene (PS) to make
For the raw material of resin fibre 12.In addition, embodiment 2 and embodiment 3 have used polyamidoimide (PAI) to be used as resin fibre 12
Raw material.
[resin fibre]
The PS of the raw material as resin fibre 12 of embodiment 1 and comparative example 2 density be proportion be 1.05, its frequently compared with
The 2.5 of the glass fibre of example 1 are small.In addition, the PAI of the raw material as resin fibre 12 of embodiment 2 and embodiment 3 proportion is
1.42, it is smaller than glass fibre.Thus, with regard to the vacuum insulation that core 10 is formed by resin fibre 12 of embodiment 1 to embodiment 3
For plate 14, compared with using the vacuum heat-insulating plate of existing glass fibre, lighting can be realized.
The PS of the raw material as resin fibre 12 of embodiment 1 and comparative example 2 has used dimethylformamide as solvent.
In the case of example 1, the mean molecule quantity as the PS of raw material is 218000, and it is the molten of 23 (weight %) to be adjusted to concentration
Liquid.In the case of comparative example 2, the mean molecule quantity as the PS of raw material is 329000, and it is 18 (weight %) to be adjusted to concentration
Solution.In addition, the PAI of the raw material as resin fibre 12 of embodiment 2 and embodiment 3 has used N- methyl -2- pyrrolidines
Ketone is as solvent.In the case of embodiment 2, the PAI as raw material is adjusted to the solution that concentration is 14 (weight %).Implementing
In the case of example 3, the PAI as raw material is adjusted to the solution that concentration is 30 (weight %).
Embodiment 1 has carried out spinning to the resin fibre 12 of embodiment 3 and comparative example 2 using method of electrostatic spinning.Now,
It is set as 40 (kV) applied to the voltage on spinneret head 22.Fibre diameter with regard to resulting resin fibre 12 is that outside diameter d is come
Say, embodiment 1 is 0.68 (μm), and embodiment 2 is 0.45 (μm), and embodiment 3 is 0.80 (μm).And the glass fibre of comparative example 1
Outside diameter d be 1~5 (μm).In addition, the external diameter of comparative example 2 is 4.4 (μm).Embodiment 1 is to embodiment 3 and the resin of comparative example 2
Fiber 12 is forming knot to the i.e. non-woven fabrics 11 of each fibre spinning completion formed by the injection by multiple spinneret heads 22
Be formed as continuous one untill beam.Therefore, in the case of embodiment 1 to embodiment 3 and comparative example 2, the resin that is formed
The fiber length of fiber 12 is with relative to the sufficient length that outside diameter d is more than 1000 times.On the other hand, the glass fibre of comparative example
Fiber length be less than 1 (mm).
So, the thermal insulation of the core 10 formed to the non-woven fabrics 11 by the resin fibre 12 obtained with method of electrostatic spinning spinning
Performance is evaluated.Heat-insulating property is by having used resin fibre 12 to embodiment 1 to embodiment 3 and comparative example 2
Core 10 has used the core of existing glass fibre to be compared to carry out evaluation with comparative example 1.Embodiment 1 is to reality
The core for having used the core 10 of resin fibre 12 and having used existing glass fibre of example 3 and comparative example 2 is applied with phase
Be formed as vacuum heat-insulating plate 14 with condition.Heat-insulating property is to use formed vacuum heat-insulating plate 14 to compare.Make
Thermal conductivity factor with the vacuum heat-insulating plate 14 of existing glass fibre is 4.0 (mW/mK).Existing glass has been used for this
The vacuum heat-insulating plate 14 of fiber, is evaluated as " zero：Thermal conductivity factor is small ", " △：Thermal conductivity factor is equal ".As a result, the He of embodiment 1
Embodiment 3 is evaluated as " △ ", equal with the thermal conductivity factor of existing glass fibre.In addition, the evaluation of comparative example 2 is also
“△”.On the other hand, embodiment 2 is evaluated as "○", and thermal insulation is higher than existing glass fibre.
From the result of these embodiment 1 to embodiment 3：No matter as the resin of raw material, possess by outside diameter d
The vacuum heat-insulating plate 14 of the core 10 formed for 1 μm of resin fibres 12 of d ＜ is with possessing the core formed by existing glass fibre
The vacuum heat-insulating plate 14 of material 10 improves compared to thermal insulation.In addition, these embodiments 1 to embodiment 3 due to the ratio of resin fibre 12
It is again smaller than existing glass fibre, therefore the lighting of formed vacuum heat-insulating plate 14 can be realized.
And then when to embodiment 2 compared with embodiment 3, the evaluation of the thermal conductivity factor of embodiment 2 is higher.This meaning
Taste：In the case of the raw material identical of resin fibre 12, outside diameter d is smaller, and thermal conductivity factor more improves.Therefore, it is possible to make to pass through
The outside diameter d path of the resin fibre 12 of core 10 is formed using method of electrostatic spinning, the exhausted of vacuum heat-insulating plate 14 can be realized
Hot raising.
In addition, in the case of embodiment 1 to embodiment 3, while being spun by method of electrostatic spinning to resin fibre 12
Silk is while form non-woven fabrics 11.Thus, the intertexture for having the resin fibre 12 of long fibre length mutual becomes firm, is formed
The dimensionally stable of non-woven fabrics 11.In addition, the non-woven fabrics 11 formed by resin fibre 12 can realize lighting.Dimensionally stable and light
The non-woven fabrics 11 of matter can be multilayer laminated.As a result, lightweight and solid core 10 can be manufactured using resin.
(refrigerator)
Next, the refrigerator for having used above-mentioned vacuum heat-insulating plate 14 is illustrated based on Fig. 9 and Figure 10.
Refrigerator 40 possesses the body of thermal insulating box 41 for having preceding surface opening as shown in Figure 9.Refrigerator 40 is in the body of thermal insulating box 41
Kind of refrigeration cycle (not shown) is installed.In addition, refrigerator 40 possesses：Body of thermal insulating box 41 is separated into the (not shown) of multiple storerooms
Demarcation strip；Cover the insulated door (not shown) on the preceding surface of storeroom；And moved forward and backward in the inside of storeroom not shown
Drawer etc..The body of thermal insulating box 41 of refrigerator 40 has outer container 42, interior case 43 and is clipped in true between these outer containers 42 and interior case 43
Empty heat-insulating shield group 50.Outer container 42 is formed by steel plate, and interior case 43 is formed by synthetic resin.
Vacuum heat-insulating plate group 50 is split in a manner of each wall portion of the body of thermal insulating box 41 with refrigerator 40 is corresponding.It is specific next
Say, vacuum heat-insulating plate group 50 is divided into left wall plate 51, right wall plate 52, top plate 53, squab panel 54 and bottom as shown in Figure 10
Wallboard 55.These left wall plates 51, right wall plate 52, top plate 53, squab panel 54 and base wall panel 55 are by the above-mentioned structure of vacuum heat-insulating plate 14
Into.Left wall plate 51, right wall plate 52, top plate 53, squab panel 54 and base wall panel 55 are assembled into vacuum heat-insulating plate group 50, sandwich outer container
Between 42 and interior case 43.The left wall plate 51 for forming vacuum heat-insulating plate group 50, right wall plate are formed between outer container 42 and interior case 43
52nd, top plate 53, squab panel 54 and the mutual gap of base wall panel 55 are sealed by thermal insulation containment member (not shown).Seal structure
Part is, for example, what is formed by foaminess resin etc..
So, refrigerator 40 has the vacuum heat-insulating plate group 50 for forming body of thermal insulating box 41.Vacuum heat-insulating plate group 50 is by above-mentioned
What vacuum heat-insulating plate 14 was formed.Therefore, it is possible to further reduce thickness, weight and ensure high thermal insulation.
The core of the vacuum heat-insulating plate of present embodiment is the composition that multiple non-woven fabrics are laminated, and non-woven fabrics is by thermosetting
Resin fibre is formed, and the thermoset resin fibres are formed by thermosetting resin.According to this composition, just it is made up of at last resin fibre
The situation of non-woven fabrics, can also ensure that the intensity of the resin fibre, and enough spaces are can also ensure that after decompression, can
Heat-insulating property is avoided to reduce.As illustrated in Figure 11 like that, based on the vacuum heat-insulating plate of non-woven fabrics that is made up of fiber
Core is compressed along with the inner pressure relief of vacuum heat-insulating plate, and internal voidage reduces.Here, by thermoset resin fibres
The voidage that the voidage after decompression when forming non-woven fabrics becomes after decompression during than being made up of non-woven fabrics glass fibre is small, but
Become the voidage after decompression during than being made up of non-woven fabrics such as polystyrene of the resin fibre in addition to thermosetting resin
Greatly.
Therefore, by the core for the vacuum heat-insulating plate that non-woven fabrics is made up of thermoset resin fibres, thermal insulation can be suppressed
It can be reduced compared with the core of vacuum heat-insulating plate of non-woven fabrics is made up of the resin fibre in addition to thermosetting resin.In addition,
By the core for the vacuum heat-insulating plate that non-woven fabrics is made up of thermoset resin fibres, due to the thermal conductivity ratio glass of resin fibre
Fiber is high, even if therefore voidage it is small when becoming than forming non-woven fabrics by glass fibre, can also play with by glass fibre structure
Into when equal heat-insulating property.
More than, embodiments of the present invention are illustrated, but these embodiments are shown as an example, its
It is not intended to limit the scope of invention.These novel embodiments can be implemented in the form of other are various, not depart from hair
In the range of bright purport, various omissions, displacement, change can be carried out.These embodiments and its deformation are contained in invention
In scope, purport, while it is contained in invention and its equivalent scope described in claims.
Claims (16)
1. a kind of core of vacuum heat-insulating plate, it is the core for the vacuum heat-insulating plate that multiple non-woven fabrics are laminated, wherein, it is described
Non-woven fabrics is made up of thermoset resin fibres, and the thermoset resin fibres are formed by thermosetting resin.
2. the core of vacuum heat-insulating plate according to claim 1, wherein, the thermoset resin fibres are included by thermosetting
The main material that resin material is formed and the curing agent for making the main material solidification.
3. the core of vacuum heat-insulating plate according to claim 1, wherein, the non-woven fabrics has been carried out for removing solvent
Drying process.
4. the core of vacuum heat-insulating plate according to claim 1, wherein, the thermoset resin fibres are by epoxy resin
The fiber of formation.
5. the core of vacuum heat-insulating plate according to claim 1, wherein, the outside diameter d of the thermoset resin fibres is d ＜
1μm。
6. the core of vacuum heat-insulating plate according to claim 1, wherein, the thermoset resin fibres are by electrostatic spinning
What method was formed, the method for electrostatic spinning the spinneret head of additional voltage with will be molten between the relative pole plate in the spinneret head
Solution is projected in the resin of solvent by the spinneret head towards the pole plate.
7. the core of vacuum heat-insulating plate according to claim 1, wherein, the density ratio glass of the thermoset resin fibres
It is small.
8. the core of vacuum heat-insulating plate according to claim 1, wherein, the thermoset resin fibres are added with inorganic system
Filler.
9. the core of vacuum heat-insulating plate according to claim 6, wherein, the material as the thermoset resin fibres
Resin has compatibility with the solvent.
10. the core of vacuum heat-insulating plate according to claim 1, wherein, the nonwoven layer is laminated with more than 100.
11. the core of vacuum heat-insulating plate according to claim 1, wherein, the non-woven fabrics is by including the thermosetting tree
The two or more resin fibres of fat fiber are formed.
12. the core of vacuum heat-insulating plate according to claim 1, it possesses the non-woven fabrics that is laminated with multiple
The aluminium foil that one surface side connects.
13. the core of vacuum heat-insulating plate according to claim 1, wherein, the thermoset resin fibres are random bend
The shape formed.
14. the core of vacuum heat-insulating plate according to claim 1, wherein, the thermoset resin fibres are that have relatively
In the long fibre for the length that its external diameter is more than 1000 times.
15. a kind of vacuum heat-insulating plate, it possesses the core of the vacuum heat-insulating plate described in claim 1.
16. a kind of refrigerator, it possesses the vacuum heat-insulating plate described in claim 15.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| JP2016-174916 | 2016-09-07 | ||
| JP2016174916A JP2018040421A (en) | 2016-09-07 | 2016-09-07 | Core material for vacuum heat insulation panel, vacuum heat insulation panel and refrigerator |
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| JP (1) | JP2018040421A (en) |
| CN (1) | CN107791634A (en) |
Cited By (3)
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| CN110388538A (en) * | 2018-04-16 | 2019-10-29 | Aqua株式会社 | Vacuum heat insulating material |
| CN110539543A (en) * | 2019-08-01 | 2019-12-06 | 陈小强 | Preparation method of high-strength heat-insulating felt |
| CN111902670A (en) * | 2018-03-23 | 2020-11-06 | 株式会社钟化 | Thermal insulation sheet, thermal insulation material, and method for producing thermal insulation sheet |
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| KR102181207B1 (en) * | 2019-07-16 | 2020-11-23 | 주식회사 예스히팅테크닉스 | Heating jacket for semiconductor manufacturing pipe |
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| JP2018040421A (en) | 2018-03-15 |
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Application publication date: 20180313 |