CN105757400A - Core material for vacuum insulation plate and vacuum insulation plate form by same - Google Patents

Core material for vacuum insulation plate and vacuum insulation plate form by same Download PDF

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Publication number
CN105757400A
CN105757400A CN201610225422.8A CN201610225422A CN105757400A CN 105757400 A CN105757400 A CN 105757400A CN 201610225422 A CN201610225422 A CN 201610225422A CN 105757400 A CN105757400 A CN 105757400A
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China
Prior art keywords
core
glass
vacuum heat
glass fibre
insulation plate
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CN201610225422.8A
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Chinese (zh)
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CN105757400B (en
Inventor
糜玥崎
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糜玥崎
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Priority to CN201610225422.8A priority Critical patent/CN105757400B/en
Priority to CN201310172558.3A priority patent/CN104141859B/en
Publication of CN105757400A publication Critical patent/CN105757400A/en
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Publication of CN105757400B publication Critical patent/CN105757400B/en

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    • 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
    • F16L59/02Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/029Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
    • 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
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H13/00Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/36Inorganic fibres or flakes
    • D21H13/38Inorganic fibres or flakes siliceous
    • D21H13/40Inorganic fibres or flakes siliceous vitreous, e.g. mineral wool, glass fibres
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21JFIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J1/00Fibreboard
    • 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
    • B32B2250/00Layers arrangement
    • B32B2250/20All layers 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
    • B32B2262/00Composition 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
    • B32B2309/00Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/12Pressure

Abstract

The invention relates to a core material for a vacuum insulation plate and a vacuum insulation plate form by the same. The core material for the vacuum insulation plate comprises a middle core material body consisting of multiple layers of stacked glass fiber sheet materials (that is, chopped strand core materials) formed with a wet paper-making method, or glass fiber felt (that is, dry glass fiber cotton core materials) formed with a dry non-woven fabric technology or laminates (that is, mixed core materials) of the glass fiber sheet materials and the glass fiber felt, wherein ultra-thin glass fiber cotton sheet materials are arranged on upper and lower sides of the middle core material body; diameters of fibers in the ultra-thin glass fiber cotton sheet materials are in a range of 1-4 microns, and lengths of the fibers are in a range of 1-5 mm. The ultra-thin glass fiber cotton sheet materials are small in fiber diameter, short and softer in fiber and cannot pierce a film bag easily, so that the ultra-thin glass fiber cotton sheet materials are applicable to aluminized film and aluminum foil composite film production; the condition that large areas of the chopped strand core materials or dry glass fiber felt core materials are in contact with the film bag is avoided, and the risk that the fibers pierce the film bag is effectively avoided.

Description

Core material of vacuum heat insulation plate and the vacuum heat-insulating plate of composition thereof
Technical field
The present invention relates to a kind of core material of vacuum heat insulation plate and preparation method thereof, and apply the vacuum heat-insulating plate of this core, being specifically related to a kind of at chopped silk core (using the lamination of the chopped thread sheet material of wet moulding) or at dry method Chopped Strand Mat core or contain the both sides up and down of the chopped thread sheet material of wet moulding and the core of dry method Chopped Strand Mat at the same time and arrange the core material of vacuum heat insulation plate of superfine glass fiber cotton piece material, it is applicable to the fields such as household electrical appliances insulation, Cold Chain Logistics, building heat preservation.
Background technology
Current core material of vacuum heat insulation plate is typically chosen porous media material, and such as materials such as powdered silica, aeroge, glass fibre or microvoid polyurethanes, each material has its pluses and minuses.Secondly, every kind of central layer is in use, it is necessary to add desiccant or getter, removes the gas and moisture not eliminated in Obstruct membrane and core, it is ensured that vacuum, thus improves the service life of vacuum heat-insulating plate.Vacuum heat-insulating plate has applied in every field, and it meets customer requirement with energy-conservation, low-carbon (LC), environmental protection, the characteristic of safety.By investigation and practical operation, selection and the manufacture method of the internal core of vacuum heat-insulating plate are the biggest on the impact of its properties, porous media material typically selected by core, such as aeroge, polyurathamc, SiO 2 powder, asbestos fibre, glass fibre etc..For core material of vacuum heat insulation plate, it is necessary to possess following four characteristic: 1, under fine vacuum negative pressure state, vacuum insulation intralaminar part is had supporting role, prevent vacuum heat-insulating plate from shrinking, caving in;2, the generation of conduction of heat to be reduced as far as.3, must possess open-celled structure, make gas can be discharged with prestissimo under negative pressure state;4, material need to possess under vacuum or ultralow vacuum state, does not discharge gas or discharges gas less.
Different because of vacuum heat-insulating plate application at present, the selection of its core the most difference.Requiring that thermal resistance performance is good for household electrical appliances insulation, building heat preservation etc., heat conductivity is low.Current most of insulation material heat conductivitys are high, and bulky, thickness is typically between 1cm-5cm, after household electrical appliances insulation, Cold Chain Logistics, building heat preservation, reduce household electrical appliances, the available space of building and to be incubated the life-span short.Vacuum heat-insulating plate has complied with each field insulation demand just, it is desirable to the requirement that warming plate lower thickness, heat conductivity reduce.
China Patent No.: ZL200880122390.2 discloses a kind of vacuum heat insulation material core material, i.e. chopped silk core, a diameter of 6-13um of the glass fibre of employing, a length of 4-20mm;It is consisted of multiple non-woven fabrics of stacking;This non-woven fabrics at least includes a plurality of glass fibre utilizing continuous filament method to manufacture.In non-woven fabrics, the most of glass fibre in a plurality of glass fibre is extending in the surface direction that is substantially parallel of non-woven fabrics.
It is in place of above-mentioned the deficiencies in the prior art: its fiber is straight relatively thick, and length longer (a diameter of 6-13um, a length of 4-20mm), fiber is harder;For using aluminizer to carry out the vacuum heat-insulating plate (VIP) of outsourcing, evacuation, during actual production or using, described fiber is easy to pierce through aluminizer;So when producing VIP, the diaphragm seal material of outsourcing does not the most use aluminizer;Use foil laminated film to produce VIP at present, overcome the problems referred to above;And this results in new problem, owing to foil laminated film containing aluminum layer (AL) and aluminium coated (VMPET), and this aluminium lamination thicker (generally about 7um), cause VIP can produce the more serious heat bridge effect of ratio in actual application, this inevitably results in VIP overall thermal conductivity and increases, thus affects energy-saving effect and product quality.
Aluminum layer in foil laminated film is the thin slice of the very thin form formed after repeatedly calendering with highly purified aluminum, is excellent heat carrier, and the purity of Packaging Aluminum Foil is more than 99.5%.
Containing aluminium coated (VMPET) in aluminizer, and not containing aluminum layer (AL), therefore, the heat-conducting effect of aluminizer is far below foil laminated film.
Therefore, how while using aluminizer to carry out VIP encapsulation, it is to avoid fiber pierces through aluminizer, is that this area to solve the technical problem that.
Summary of the invention
The technical problem to be solved is to provide and a kind of use aluminizer to be packaged and can avoid fiber core material of vacuum heat insulation plate piercing through aluminizer and preparation method thereof.
For solving above-mentioned technical problem, the invention provides a kind of core material of vacuum heat insulation plate, comprising: by the multilayer laminated glass fibre sheet (i.e. chopped silk core) using wet paper manufacturing method molding, or the glass mat (i.e. dry method glass cotton core material) of employing dry method non-woven fabrics craft molding, or the middle core that glass fibre sheet is constituted with the lamination of glass mat (i.e. mixing core);It is coated with superfine glass fiber cotton piece material in the both sides up and down of this middle core;Fibre diameter in described superfine glass fiber cotton piece material is 1-4um, a length of 1-5mm.
Described superfine glass fiber cotton piece material uses wet paper manufacturing method molding or dry method non-woven fabrics craft molding.
Constitute a diameter of 4-20um of the glass fibre of described glass mat, a length of 4-15mm.
Preferred as one, described glass fibre sheet uses the glass chopped silk molding that a diameter of 6-13um, a length of 4-20mm fiber elongation method produce.
Described glass fibre sheet and the glass fibre layer distributed in glass mat, major part are parallel with end face, and the glass fibre random distribution in isoplanar, the thickness of this sheet material uniformly, is beneficial to evacuation.
As the optional embodiment of another kind, described glass fibre sheet includes: the glass fibre cotton that the glass chopped silk of 70-100wt%, a diameter of 6-13um, a length of 4-20mm, fiber elongation method production and 0-30wt%, a diameter of 1.0-4um, a length of 1-5mm, flame method produce;Use the glass fibre cotton that flame method manufactures, diameter is thin, length is short, the glass fibre cotton density obtained the most accordingly is relatively big, and the core material of vacuum heat insulation plate heat conductivity made is relatively low, but if the glass fibre cotton individually using flame method to produce produces core material of vacuum heat insulation plate, manufacturing cost can be caused higher, and making the heat conductivity of the vacuum heat-insulating plate made be difficult to reach below 0.0025W/m.k, quality is unstable, poor controllability;In the present invention, the glass chopped silk of employing 70-100wt% fiber elongation method production and the glass fibre cotton of 0-30wt% flame method production are as core material of vacuum heat insulation plate raw material, glass fibre cotton proportion is less, in terms of existing technologies, greatly reduce production cost, improve constant product quality;The core material of vacuum heat insulation plate heat conductivity produced is at below 0.030W/m.k, and its heat-insulating shield heat conductivity is low relative to the glass fibre cotton core using 100wt% flame method to produce, and heat insulation effect is preferable;Monolithic core thickness controls under 0.5-5mm(10kpa pressure), density domination is at 80kg/m-200kg/m, and compression ratio is more slightly larger than the superfine glass fiber cotton core material using 100wt% flame method to produce, but will not have big impact to production technology.
As the optional embodiment of another kind, between glass fibre sheet between adjacent two layers glass fibre sheet or adjacent and glass mat, it is provided with the silicon dioxide bisque of 1-15mm thickness or the plate that employing silicon dioxide powder is compressing;Silicon dioxide layer or plate are used in mixed way with glass fibre, are beneficial to improve further effect of heat insulation and the combination property of core material of vacuum heat insulation plate.
As the most preferred, the distribution parallel with the end face of this glass mat of the most of glass fibre in described glass mat, it is beneficial to evacuation.
The manufacture method of above-mentioned core material of vacuum heat insulation plate, comprises the steps:
(1) a diameter of 6-13um, the glass chopped silk of a length of 4-20mm fiber elongation method production are taken;Or, take the glass fibre cotton mixing that 70-100wt%, a diameter of 6-13um, a length of 4-20mm, the glass chopped silk of fiber elongation method production and 0-30wt%, a diameter of 1.0-4um, a length of 1-5mm, flame method produce;
(2) being disperseed by above-mentioned glass fibre, then add water stirring, sends into pond with slurry dilute, diluted concentration to 0.3-1.0wt% after stirring;
(3) slurry diluted being sent into flow box, the serosity layering that flow box flows out flows on a forming net, be evenly distributed with negative pressure suction inlet under this forming net, to be dehydrated;Fiber after dehydration is deposited on described forming net and thickness is uniform, layer distributed is parallel with end face, forms the lamella of desired thickness, i.e. obtains wet plate;
(4) use pressure roller that above-mentioned wet plate is rolled so that it is surfacing, thickness are uniform;
(5) wet plate that will complete above-mentioned steps (4) forms glass fibre sheet after dehydration, dried;
(6) take a diameter of 1-4um, a length of 1-5mm superfine glass fiber cotton, and repeat the above steps (2)-(4) obtain wet plate, this wet plate is formed after dehydration, dried superfine glass fiber cotton piece material;
(7) middle core will be constituted after above-mentioned for multilamellar glass fibre sheet stacking;After superfine glass fiber cotton piece material is laid in the both sides up and down of this middle core, carry out cutting, make required core.
Use the glass fibre core that said method produces, the technique effect having: be beneficial to vacuum heat-insulating plate evacuation, to reduce the heat conductivity of vacuum heat-insulating plate, and the heat conductivity < 0.0025W/m.k of the vacuum heat-insulating plate made can be made.The core material of vacuum heat insulation plate moulding process of the present invention is simple, low cost, stable and controllable for quality.
Preferred as one, under the pressure condition of 10KPa, the thickness of the glass fibre sheet that described step (5) generates is 0.5-5mm, and the thickness of the superfine glass fiber cotton piece material in described step (5) is 0.2-2mm.The glass chopped filament diameter used owing to making central layer is 6-13um, and the glass chopped silk that a length of 4-20mm fiber elongation method produces, so under the pressure condition of 10KPa, described glass fibre sheet blank optimum thickness is 0.5-5mm.
Preferred as one, when in described step (3), glass layer is dehydrated by forming net, the speed of forming net is 12-30 m/min.Using this speed to can effectively ensure that the wet plate even density produced by forming net, marshalling, integral thickness is relatively uniform, improves core material of vacuum heat insulation plate end product quality.
Preferred as one, in the dilution of described step (2), add the hydroxylated cellulose of the 0.005-0.015% of above-mentioned glass chopped silk gross weight, to reduce electrostatic effect.
Preferred as one, for generating the glass fibre sheet of said structure, the top surface inclination of described forming net is arranged;Forming net is arranged over the diversion channel being connected with described flow box, and the base plate of this diversion channel is parallel with the end face of described forming net, and the base plate of diversion channel is evenly distributed with the narrow slit type nozzle vertical with the length direction of described forming net;Described negative pressure suction inlet is oppositely arranged with described narrow slit type nozzle and is distributed in the side, downstream of each narrow slit type nozzle respectively, the fiber being beneficial in serosity is evenly distributed on the end face of described forming net, and makes fiber fractionation isoplanar be distributed, be largely parallel to the surface of glass fibre sheet.
As the preferred scheme of one, described forming net is conveyor type, is beneficial to produce continuously.
As further preferred scheme, the direction of transfer of described forming net end face is from bottom to top, and beneficially fiber is deposited on described forming net and thickness is uniform, layering isoplanar is distributed, major part is parallel.
A kind of vacuum heat-insulating plate, it includes above-mentioned core material of vacuum heat insulation plate, and be coated on this core material of vacuum heat insulation plate, for realizing aluminizer or the foil laminated film of evacuation, or the bag being made up of above-mentioned aluminizer or foil laminated film.
The technique effect of the present invention:
1, the present invention covers superfine glass fiber cotton core material at chopped silk or dry method glass felt core levels, i.e. constitute a kind of composite core material, what it obtained has the technical effect that superfine glass fiber cotton core material is little due to the diameter of fiber own, length is short, fiber is softer, it is not easy to puncture film bag (i.e. avoid a diameter of 6-13um of the prior art, the glass fibre of a length of 4-20mm easily punctures the situation of aluminizer bag), so applicable aluminizer produces VIP;This avoids chopped silk core or dry method Chopped Strand Mat core is large-area contacts with film bag, effectively prevent the risk of fiber puncture film bag;Foil laminated film can certainly be used as required to produce VIP;
2, described composite core material can be suitable for polytype film material and produce VIP;By the arranging scheme of this composite core material, breaching the restriction that thick diameter core can only use foil laminated film to produce, the VIP plate being actually needed produced by composite core material film material of can arbitrarily arranging in pairs or groups;
3, chopped silk core of the prior art and dry method Chopped Strand Mat core are the most fluffy, in order to promote chopped silk and dry method Chopped Strand Mat core performance, binding agent can be reduced in process of production as far as possible, so chopped silk core and dry method Chopped Strand Mat core are easily caused central layer breakage in process of production, chopped silk drops, it is difficult to pack, the phenomenon such as finished surface out-of-flatness, and uses that superfine glass fiber is cotton can effectively solve these problems after levels is wrapped up.
Accompanying drawing explanation
Fig. 1 is the structural representation of the process units of core material of vacuum heat insulation plate;
Fig. 2 is a kind of cross-sectional view of core material of vacuum heat insulation plate, and it is used the glass fibre sheet of wet paper manufacturing method molding and the alternately laminated molding of glass mat using dry method non-woven fabrics craft molding by multilamellar;
Fig. 3 is the another kind of cross-sectional view of core material of vacuum heat insulation plate, and it is used the compressing alternately laminated molding of plate of the glass fibre sheet of wet paper manufacturing method molding, the glass mat and the silicon dioxide bisque that use dry method non-woven fabrics craft molding or employing silicon dioxide powder by multilamellar.
Detailed description of the invention
Below in conjunction with instantiation, the present invention is described in further detail.
Embodiment 1
Such as Fig. 2, the core material of vacuum heat insulation plate of this example includes by the glass fibre sheet 8(i.e. chopped silk core using wet paper manufacturing method molding of 10 to 30 layer stackup) the middle core that constitutes;At least one of which superfine glass fiber cotton piece material 9 it is completely covered with in the both sides up and down of this middle core;Fibre diameter in described superfine glass fiber cotton piece material 9 is 1-4um, a length of 1-5mm, the heat conductivity≤0.0025W/m.k of the vacuum heat-insulating plate being made up of this core.
As a kind of variable embodiment, described middle core is located in the bag being made up of above-mentioned superfine glass fiber cotton piece material, or above-mentioned superfine glass fiber cotton piece material 9 wraps up the edge of described middle core, to avoid the edge of glass fibre sheet 8 directly to come in contact with aluminizer or foil laminated film.
Described glass fibre sheet is by using a diameter of 6-13um, and the glass chopped silk that a length of 4-20mm fiber elongation method produces is through wet paper manufacturing method molding.
The manufacture method of above-mentioned core material of vacuum heat insulation plate, specifically comprising the following steps that of this manufacture method
(A) a diameter of 6-13um, the glass chopped silk of a length of 4-20mm fiber elongation method production are taken;
(B) being disperseed by above-mentioned glass fibre, then add water stirring, sends into pond with slurry dilute, diluted concentration to 0.8wt% after stirring, and add above two glass fibre gross weight 0.012% hydroxylated cellulose, to reduce electrostatic effect;
(C) glass fiber slurry diluted is sent into storage stock tank;
(D) flow box 2 sent into by the slurry that will store in stock tank, and the serosity 3 that flow box 2 flows out flows on forming net 1 by multilamellar nozzle 4 layering, equipped with the blower fan suction inlet (i.e. negative pressure suction inlet 5) corresponding with nozzle 4 and carry out batch vacuum dehydration below forming net 1.Fiber after dehydration be deposited on forming net 1 formation uniformly, arrange orderly lamella, i.e. make glass chopped silk wet plate;When in this step, glass fiber slurry is dehydrated by forming net 1, the speed of forming net 1 is 20-25 m/min;
(E) use pressure roller 6 that glass fibre wet plate is laterally rolled, make surfacing, the thickness of glass fibre wet plate is adjusted simultaneously, make glass fibre wet plate thickness be adjusted to 1.5mm;
(F) the glass fibre wet plate completing shaping is phoresied the moisture removal of 60% in glass fibre wet plate in the conveyer belt of negative pressure of vacuum, make glass fibre wet plate water content control below 40%;
(G) then the glass fibre wet plate removing moisture removal being sent into baking and curing in baking box 8, in baking box 8, temperature controls at 280 degrees Celsius, and baking time is 15 minutes;Fiber glass core sheet material is formed after having toasted;
(H) take a diameter of 1-4um, a length of 1-5mm superfine glass fiber cotton, and repeat the above steps (B)-(F) obtain wet plate, this wet plate is sent into baking and curing in baking box 8, in baking box 8, temperature controls at 280 degrees Celsius, and baking time is 15 minutes;Superfine glass fiber cotton piece material is formed after having toasted;
(I) by glass fibre sheet stacking described in multilamellar and middle core is constituted according to production requirement;After superfine glass fiber cotton piece material is laid in the both sides up and down of this middle core, carry out cutting, cut into 600mm × 600mm, i.e. obtain core material of vacuum heat insulation plate finished product.
Fig. 1, the top surface inclination of described forming net 1 is arranged;Forming net 1 is arranged over the diversion channel 7 being connected with described flow box 2, and the base plate of this diversion channel 7 is parallel with the end face of described forming net 1, and the base plate of diversion channel 7 is evenly distributed with the narrow slit type nozzle 4 that the length direction of multiple and described forming net 1 is vertical;Each negative pressure suction inlet 5 is oppositely arranged and is distributed in the side, downstream of each narrow slit type nozzle 4 with described narrow slit type nozzle 4 respectively, and the fiber being beneficial in serosity is evenly distributed on the end face of described forming net.The width of narrow slit type nozzle 4 is 1-8mm.
Described forming net 1 is conveyor type, is beneficial to produce continuously;The direction of transfer of forming net 1 end face is from bottom to top, and beneficially fiber is deposited on described forming net and thickness is uniform, layer distributed, major part are parallel with the end face of glass fibre sheet.
Alternatively, in described step (I), between glass fibre sheet 8 between adjacent two layers glass fibre sheet 8 or adjacent and superfine glass fiber cotton piece material 9, it is provided with the silicon dioxide bisque of 10mm thickness or the plate 10 that employing silicon dioxide powder is compressing.
Embodiment 2
The middle core of the core material of vacuum heat insulation plate of this example is by compound glass fibre sheet material through wet paper manufacturing method molding after using glass chopped silk and glass fibre cotton uniformly to mix, with the alternately laminated molding of single-layer glass fiber felt that at least one of which uses dry method non-woven fabrics craft molding, then described superfine glass fiber cotton piece material, the heat conductivity≤0.0025W/m.k of the vacuum heat-insulating plate being made up of this core are all laid in the middle upper and lower both sides of core.
Embodiment 3
The middle core of the core material of vacuum heat insulation plate of this example is made up of the glass mat using dry method non-woven fabrics craft molding, then described superfine glass fiber cotton piece material, the heat conductivity≤0.0030W/m.k of the vacuum heat-insulating plate being made up of this core are all laid in these upper and lower both sides of middle core.
Above-mentioned glass mat uses centrifugal injection method (abbreviation centrifuging) to produce glass microfiber technique;Centrifuging produces its production technology of glass microfiber and includes: raw material system, found system, fiberizing system, burning gases mixing feed system etc..Raw material sends into glass melter after mixing according to proportioning, and the vitreous humour melted flows out through the bushing of material road end, enters centrifuge.Under the centrifuge of high speed rotating drives, nearly ten thousand strands of glass threads that centrifuge sidewall throws away, under the high temperature and high speed flame that combustor produces, it is further drawn, cuts into the fiber of certain length.This technique be first spinning head perisporium hole in throw away initial glass thread, the high temperature and high speed flame that followed by combustor produces carries out succeeding stretch to glass thread.
Embodiment 4
A kind of vacuum heat-insulating plate, it includes the core material of vacuum heat insulation plate that one of above-described embodiment 1-3 is described, and be coated on this core material of vacuum heat insulation plate, for realizing aluminizer or the foil laminated film of evacuation, or the bag for evacuation being made up of above-mentioned aluminizer or foil laminated film.
Polyester aluminium coated (VMPET) that described aluminizer includes about 2 to 5 layers laminations, that 12um is thick, and it is in each polyester aluminium coated (VMPET) bottom, the linear low density polyethylene layer (LLDPE) of 50um thickness.
Described foil laminated film includes successively the nylon layer (15um) of lamination, polyester aluminium coated (12um), aluminum layer (7um) and linear low density polyethylene (50um) up and down.
Obviously, above-described embodiment is only for clearly demonstrating example of the present invention, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also cannot all of embodiment be given exhaustive.And these spirit belonging to the present invention are extended out obvious change or variation still in protection scope of the present invention among.

Claims (9)

1. a core material of vacuum heat insulation plate, it is characterized in that including: by the multilayer laminated glass fibre sheet using wet paper manufacturing method molding, or the glass mat of employing dry method non-woven fabrics craft molding, or the middle core that the lamination of glass fibre sheet and glass mat is constituted;It is coated with superfine glass fiber cotton piece material in the both sides up and down of this middle core;
Fibre diameter in described superfine glass fiber cotton piece material is 1-4um, a length of 1-5mm.
2. core material of vacuum heat insulation plate as claimed in claim 1, it is characterised in that: described glass fibre sheet includes the glass chopped silk that a diameter of 6-13um, a length of 4-20mm fiber elongation method produce;
Or, described glass fibre sheet includes: the glass fibre cotton that the glass chopped silk of 70-100wt%, a diameter of 6-13um, a length of 4-20m, fiber elongation method production and 0-30wt%, a diameter of 1.0-4um, a length of 1-5mm, flame method produce;
Constitute a diameter of 4-20um of the glass fibre of described glass mat, a length of 4-15mm.
3. core material of vacuum heat insulation plate as claimed in claim 1, it is characterised in that: it is provided with silicon dioxide bisque between glass fibre sheet between adjacent two layers glass fibre sheet or adjacent and glass mat or uses the compressing plate of silicon dioxide powder.
4. a manufacture method for core material of vacuum heat insulation plate, comprises the steps:
(1) a diameter of 6-13um, the glass chopped silk of a length of 4-20mm fiber elongation method production are taken;Or, take the glass fibre cotton mixing that 70-100wt%, a diameter of 6-13um, a length of 4-20mm, the glass chopped silk of fiber elongation method production and 0-30wt%, a diameter of 1.0-4um, a length of 1-5mm, flame method produce;
(2) being disperseed by above-mentioned glass fibre, then add water stirring, sends into pond with slurry dilute, diluted concentration to 0.3-1.0wt% after stirring;
(3) slurry diluted being sent into flow box, the serosity layering that flow box flows out flows on a forming net, be evenly distributed with negative pressure suction inlet under this forming net, to be dehydrated;Fiber after dehydration is deposited on described forming net and thickness is uniform, layer distributed is parallel with end face, forms the lamella of desired thickness, i.e. obtains wet plate;
(4) use pressure roller that above-mentioned wet plate is rolled so that it is surfacing, thickness are uniform;
(5) wet plate that will complete above-mentioned steps (4) forms glass fibre sheet after dehydration, dried;
(6) take a diameter of 1-4um, a length of 1-5mm superfine glass fiber cotton, and repeat the above steps (2)-(4) obtain wet plate, this wet plate is formed after dehydration, dried superfine glass fiber cotton piece material;
(7) middle core will be constituted after above-mentioned for multilamellar glass fibre sheet stacking;After superfine glass fiber cotton piece material is laid in the both sides up and down of this middle core, carry out cutting, make required core.
5. the manufacture method of core material of vacuum heat insulation plate as claimed in claim 4, it is characterized in that: under the pressure condition of 10KPa, the thickness of the glass fibre sheet in described step (5) is 0.5-5mm, and the thickness of the superfine glass fiber cotton piece material in described step (5) is 0.2-2mm.
6. the manufacture method of core material of vacuum heat insulation plate as claimed in claim 4, it is characterised in that: when in described step (3), glass layer is dehydrated by forming net, the speed of forming net is 12-30 m/min.
7. the manufacture method of core material of vacuum heat insulation plate as claimed in claim 4, it is characterised in that: in the dilution of described step (2), add the hydroxylated cellulose of the 0.005-0.015% of above-mentioned glass chopped silk gross weight.
8. the manufacture method of core material of vacuum heat insulation plate as claimed in claim 4, it is characterised in that: the top surface inclination of described forming net is arranged;Forming net is arranged over the diversion channel being connected with described flow box, and the base plate of this diversion channel is parallel with the end face of described forming net, and the base plate of diversion channel is evenly distributed with the narrow slit type nozzle vertical with the length direction of described forming net;Described negative pressure suction inlet is oppositely arranged with described narrow slit type nozzle and is distributed in the side, downstream of each narrow slit type nozzle respectively;
Described forming net is conveyor type;The direction of transfer of described forming net end face is from bottom to top.
9. a vacuum heat-insulating plate, it is characterised in that including: the core material of vacuum heat insulation plate as described in claim 1 or 4, and it is coated on the aluminizer on this core material of vacuum heat insulation plate or foil laminated film.
CN201610225422.8A 2013-05-10 2013-05-10 The vacuum heat-insulating plate of core material of vacuum heat insulation plate and its composition CN105757400B (en)

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