CN104141859B - A kind of core material of vacuum heat insulation plate and vacuum heat-insulating plate - Google Patents
A kind of core material of vacuum heat insulation plate and vacuum heat-insulating plate Download PDFInfo
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- CN104141859B CN104141859B CN201310172558.3A CN201310172558A CN104141859B CN 104141859 B CN104141859 B CN 104141859B CN 201310172558 A CN201310172558 A CN 201310172558A CN 104141859 B CN104141859 B CN 104141859B
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- 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
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
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- 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
- B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—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 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
- B32B5/26—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 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
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP 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
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/36—Inorganic fibres or flakes
- D21H13/38—Inorganic fibres or flakes siliceous
- D21H13/40—Inorganic fibres or flakes siliceous vitreous, e.g. mineral wool, glass fibres
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J1/00—Fibreboard
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- 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
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- 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
- B32B2250/00—Layers arrangement
- B32B2250/20—All layers being fibrous or filamentary
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- 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
- B32B2262/10—Inorganic fibres
- B32B2262/101—Glass fibres
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- 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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- 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
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/12—Pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Thermal Insulation (AREA)
- Laminated Bodies (AREA)
Abstract
The present invention relates to a kind ofly adopt aluminizer to encapsulate and difficult drop-off and easy-formation can avoid fiber to pierce through core material of vacuum heat insulation plate of aluminizer and preparation method thereof. Described core material of vacuum heat insulation plate comprises by the glass fibre sheet of multilayer laminated employing wet type paper process moulding (being short chopping core), or adopt the glass mat (being dry method glass cotton core material) of dry method non-woven fabrics craft moulding, or the middle core of glass fibre sheet and lamination (the mixing core) formation of glass mat; Be provided with the cotton sheet material of superfine glass fiber in the both sides up and down of this centre core; Fibre diameter in the cotton sheet material of described superfine glass fiber is that 1-4um, length are 1-5mm. Superfine glass fiber cotton core material is because the diameter of fiber own is little, and length is short, and fiber is softer, is not easy to sting rupture of membranes bag, so be applicable to producing with aluminizer and foil laminated film; This has been avoided short chopping core or dry method Chopped Strand Mat core is large-area contacts with film bag, has effectively been avoided the risk of fiber thorn rupture of membranes bag.
Description
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, be specifically related to a kind ofly at short chopping core (adopting the lamination of the short chopping sheet material of wet moulding) or at dry method Chopped Strand Mat core or contain at the same time the short chopping sheet material of wet moulding, with the both sides up and down of the core of dry method Chopped Strand Mat, the core material of vacuum heat insulation plate of superfine glass fiber cotton sheet material is set, 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 generally selected porous media material, and 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 in use, must add drier or getter, removes the gas and the moisture that in Obstruct membrane and core, do not eliminate, ensures vacuum, thereby improves the service life of vacuum heat-insulating plate. Vacuum heat-insulating plate has applied in every field, and it has met customer requirement with the characteristic of energy-conservation, low-carbon (LC), environmental protection, safety. Known by investigation and practical operation, selecting with preparation method of the inner core of vacuum heat-insulating plate is very large on its properties impact, core is generally selected porous media material, as aeroge, polyurathamc, SiO 2 powder, asbestos fibre, glass fibre etc. For core material of vacuum heat insulation plate, must possess following four specific characters: 1, under high vacuum negative pressure state, vacuum insulation intralamellar part is had to supporting role, prevent that vacuum heat-insulating plate from shrinking, caving in; 2, to reduce as much as possible heat conducting generation. 3, must possess open-celled structure, gas can be discharged from prestissimo under negative pressure state; 4, material need possess under vacuum or ultralow vacuum state, does not discharge gas or the least possible release gas.
At present because of vacuum heat-insulating plate application difference, also difference to some extent of the selection of its core. Require resistance good in thermal property for household electrical appliances insulation, building heat preservation etc., thermal conductivity factor is low. Most insulation material thermal conductivity factor is high, bulky, and thickness is generally between 1cm-5cm, and after household electrical appliances insulation, Cold Chain Logistics, building heat preservation, utilized space and the insulation life-span of having reduced household electrical appliances, building are short. Vacuum heat-insulating plate has been complied with each field insulation demand just, wishes the requirement that the attenuation of warming plate thickness, thermal conductivity factor reduce.
China Patent No.: ZL200880122390.2 discloses a kind of vacuum heat insulation material core material, i.e. short chopping core, and the diameter of the glass fibre of employing is that 6-13um, length are 4-20mm; It consists of stacked multiple nonwoven; This nonwoven at least comprises many glass fibres that utilize continuous filament method to manufacture. In nonwoven, the most of glass fibre in many glass fibres extends in the direction substantially parallel with the surface of nonwoven.
Above-mentioned the deficiencies in the prior art part is: its fiber is directly thicker, and length is grown (diameter is that 6-13um, length are 4-20mm), and fiber is harder; For the vacuum heat-insulating plate (VIP) that adopts aluminizer to carry out outsourcing, vacuumize, in actual production or use procedure, described fiber is easy to pierce through aluminizer; So in the time producing VIP, the diaphragm seal material of outsourcing does not generally use aluminizer; Adopt at present foil laminated film to produce VIP, overcome the problems referred to above; And this has brought new problem, owing to containing aluminum layer (AL) and aluminium coated (VMPET) in foil laminated film, and this aluminium lamination thicker (being generally 7um left and right), cause VIP can produce more serious heat bridge effect in actual application, this will inevitably cause VIP overall thermal conductivity to increase, thereby affects energy-saving effect and product quality.
Aluminum layer in foil laminated film is the thin slice by highly purified aluminium form as thin as a wafer of formation after repeatedly rolling, and is good heat carrier, and the purity of Packaging Aluminum Foil is more than 99.5%.
In aluminizer, contain aluminium coated (VMPET), and do not contain aluminum layer (AL), therefore, the heat-conducting effect of aluminizer is far below foil laminated film.
Therefore, how, in adopting aluminizer to carry out VIP encapsulation, avoiding fiber to pierce through aluminizer, is the technical problem that this area will solve.
Summary of the invention
Technical problem to be solved by this invention is to provide and a kind ofly adopts aluminizer to encapsulate and can avoid fiber to pierce through core material of vacuum heat insulation plate of aluminizer and preparation method thereof.
For solving the problems of the technologies described above, the invention provides a kind of core material of vacuum heat insulation plate, it comprises: by the glass fibre sheet (being short chopping core) of multilayer laminated employing wet type paper process moulding, or adopt the glass mat (being dry method glass cotton core material) of dry method non-woven fabrics craft moulding, or the middle core of glass fibre sheet and lamination (the mixing core) formation of glass mat; Be coated with the cotton sheet material of superfine glass fiber in the both sides up and down of this centre core; Fibre diameter in the cotton sheet material of described superfine glass fiber is that 1-4um, length are 1-5mm.
The cotton sheet material of described superfine glass fiber adopts wet type paper process moulding or the moulding of dry method non-woven fabrics craft.
The diameter that forms the glass fibre of described glass mat is that 4-20um, length are 4-15mm.
Preferred as one, it is that 6-13um, length are the glass chopped silk moulding that 4-20mm fiber elongation method is produced that described glass fibre sheet adopts diameter.
Described glass fibre sheet is parallel with end face with glass fibre layer distributed, major part in glass mat, the glass fibre random distribution in isoplanar, and the even thickness of this sheet material, is beneficial to vacuumize.
As the optional embodiment of another kind, described glass fibre sheet comprises: 70-100wt%, diameter are that 6-13um, length are that glass chopped silk and 0-30wt%, the diameter that 4-20mm, fiber elongation method are produced is that 1.0-4um, length are the glass fibre cotton that 1-5mm, flame method are produced; The glass fibre cotton that adopts flame method to manufacture, diameter is thin, length is short, therefore the corresponding glass fibre cotton density obtaining is larger, and the core material of vacuum heat insulation plate thermal conductivity factor of making is lower, if but adopt separately the glass fibre cotton that flame method is produced to produce core material of vacuum heat insulation plate, can cause manufacturing cost higher, and the thermal conductivity factor that makes the vacuum heat-insulating plate of making is difficult to reach below 0.0025W/m.k, and quality is unstable, poor controllability; In the present invention, adopt the glass chopped silk of 70-100wt% fiber elongation method production and the glass fibre cotton of 0-30wt% flame method production 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, improved constant product quality; The core material of vacuum heat insulation plate thermal conductivity factor of producing is below 0.030W/m.k, and its heat-insulating shield thermal conductivity factor is low with respect to the glass fibre cotton core that adopts 100wt% flame method to produce, and heat insulation effect is better; Monolithic core thickness is controlled under 0.5-5mm(10kpa pressure), density is controlled at 80kg/m3-200kg/m3, and compression ratio is slightly larger than the superfine glass fiber cotton core material that adopts 100wt% flame method to produce, but can not have large impact to production technology.
As the optional embodiment of another kind, between adjacent two layers glass fibre sheet, or between adjacent glass fibre sheet and glass mat, be provided with the silica bisque that 1-15mm is thick or adopt the compressing plate of silicon dioxide powder; The use that mixes of silicon dioxide layer or plate and glass fibre, is beneficial to effect of heat insulation and the combination property of further raising core material of vacuum heat insulation plate.
As further preferably, the parallel distribution of end face of the most of glass fibre in described glass mat and this glass mat, is beneficial to vacuumize.
The preparation method of above-mentioned core material of vacuum heat insulation plate, comprises the steps:
(1) cut-off footpath is that 6-13um, length are the glass chopped silk that 4-20mm fiber elongation method is produced; Or getting 70-100wt%, diameter is that 6-13um, length are that glass chopped silk and 0-30wt%, the diameter that 4-20mm, fiber elongation method are produced is that 1.0-4um, length are that the glass fibre cotton that 1-5mm, flame method are produced mixes;
(2) above-mentioned glass fibre is disperseed, the stirring that then adds water, sends into pond with slurry and is diluted with water after stirring, and diluted concentration is to 0.3-1.0wt%;
(3) slurry having diluted is sent into flow box, the slurries layering that flow box flows out flows on a forming net, is evenly distributed with negative pressure suction inlet, to dewater under this forming net; Fiber laydown after dehydration on described forming net and even thickness, layer distributed, parallel with end face, forms the lamella of desired thickness, obtains wet plate;
(4) adopt pressure roller to roll above-mentioned wet plate, make its surfacing, even thickness;
(5) wet plate that completes above-mentioned steps (4) is formed to glass fibre sheet after dehydration, dry processing;
(6) cut-off footpath is the superfine glass fiber cotton that 1-4um, length are 1-5mm, and repeats above-mentioned steps (2)-(4) and obtain wet plate, this wet plate is formed after dehydration, dry processing to the cotton sheet material of superfine glass fiber;
(7) by core in the middle of stacked above-mentioned multilayer glass fibre sheet rear formation; After the cotton sheet material of superfine glass fiber is laid in the both sides up and down of this centre core, carry out cutting, make required core.
The glass fibre core that adopts said method to produce, the technique effect having: be beneficial to vacuum heat-insulating plate and vacuumize, to reduce the thermal conductivity factor of vacuum heat-insulating plate, and can make the thermal conductivity factor < 0.0025W/m.k of the vacuum heat-insulating plate of making. Core material of vacuum heat insulation plate moulding process of the present invention is simple, cost is low, 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 cotton sheet material of superfine glass fiber in described step (5) is 0.2-2mm. Because the glass chopped filament diameter of making central layer employing is 6-13um, length is the glass chopped silk that 4-20mm fiber elongation method is produced, 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), forming net dewaters to glass layer, the speed of forming net is 12-30 m/min. Adopt this speed can effectively ensure the wet plate even density of producing by forming net, marshalling, integral thickness is relatively even, has improved 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 setting of described forming net; Forming net top is provided with 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, is evenly distributed with the narrow slit type nozzle vertical with the length direction of described forming net on the base plate of diversion channel; Described negative pressure suction inlet is oppositely arranged and is distributed in respectively downstream one side of each narrow slit type nozzle with described narrow slit type nozzle, the fiber being beneficial in slurries is evenly distributed on the end face of described forming net, and makes the surface that fiber layering isoplanar distributes, major part is parallel to glass fibre sheet.
As the preferred scheme of one, described forming net is conveyor type, is beneficial to continuous production.
As further preferred scheme, the direction of transfer of described forming net end face is for from bottom to top, is beneficial to fiber laydown on described forming net and even thickness, layering isoplanar distribute, major part is parallel.
A kind of vacuum heat-insulating plate, it comprises above-mentioned core material of vacuum heat insulation plate, and be coated on this core material of vacuum heat insulation plate, for realizing the aluminizer or the foil laminated film that vacuumize, or the bag being formed by above-mentioned aluminizer or foil laminated film.
Technique effect of the present invention:
1, in the present invention, cover superfine glass fiber cotton core material in short chopping or dry method glass felt core levels, formed a kind of composite core material, its technique effect of obtaining is: superfine glass fiber cotton core material is because the diameter of fiber own is little, length is short, fiber is softer, be not easy to sting rupture of membranes bag (having avoided diameter of the prior art is the situation that glass fibre that 6-13um, length are 4-20mm easily punctures aluminizer bag), so be applicable to producing VIP with aluminizer; This has been avoided short chopping core or dry method Chopped Strand Mat core is large-area contacts with film bag, has effectively been avoided the risk of fiber thorn rupture of membranes bag; Can certainly adopt as required foil laminated film 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, break through the restriction that thick diameter core can only use foil laminated film to produce, the composite core material film material of can arranging in pairs or groups is arbitrarily produced the VIP plate of actual needs;
3, short chopping core of the prior art and dry method Chopped Strand Mat core are all more fluffy, in order to promote short chopping and dry method Chopped Strand Mat core performance, can reduce in process of production binding agent as far as possible, so short chopping core and dry method Chopped Strand Mat core easily cause central layer breakage in process of production, short chopping is dropped, be difficult for pack, the phenomenons such as finished surface out-of-flatness, and adopt superfine glass fiber cotton can effectively address these problems after levels parcel.
Brief description of the drawings
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 adopted the glass fibre sheet and the alternately laminated moulding of glass mat that adopts the moulding of dry method non-woven fabrics craft of the moulding of wet type paper process by multilayer;
Fig. 3 is the another kind of cross-sectional view of core material of vacuum heat insulation plate, and it is adopted the glass fibre sheet of wet type paper process moulding, the glass mat that adopts the moulding of dry method non-woven fabrics craft and silica bisque or adopted the compressing alternately laminated moulding of plate of silicon dioxide powder by multilayer.
Detailed description of the invention
Below in conjunction with instantiation, the present invention is described in further detail.
Embodiment 1
As Fig. 2, the core material of vacuum heat insulation plate of this example comprises that by the glass fibre sheet 8(of 10 to the 30 employing wet type paper process moulding of folding be layer by layer short chopping core) form middle core; Be coated with at least cotton sheet material 9 of one deck superfine glass fiber completely in the both sides up and down of this centre core; Fibre diameter in the cotton sheet material 9 of described superfine glass fiber is that 1-4um, length are 1-5mm, the thermal conductivity factor≤0.0025W/m.k of the vacuum heat-insulating plate of being made up of this core.
As a kind of variable embodiment, in the middle of described, core is located in the bag being made up of the cotton sheet material of above-mentioned superfine glass fiber, or the cotton sheet material 9 of above-mentioned superfine glass fiber wrap up described in the middle of the edge of core, with the edge of avoiding glass fibre sheet 8 directly and aluminizer or foil laminated film come in contact.
Described glass fibre sheet is 6-13um by adopting diameter, and length is that the glass chopped silk produced of 4-20mm fiber elongation method is through the moulding of wet type paper process.
The preparation method of above-mentioned core material of vacuum heat insulation plate, the concrete steps of this preparation method are as follows:
(A) cut-off footpath is that 6-13um, length are the glass chopped silk that 4-20mm fiber elongation method is produced;
(B) above-mentioned glass fibre is disperseed, the stirring that then adds water, sends into pond with slurry and is diluted with water after stirring, and diluted concentration is to 0.8wt%, and adds 0.012% hydroxylated cellulose of above-mentioned two kinds of glass fibre gross weights, to reduce electrostatic effect;
(C) the glass fibre slurries that diluted are sent into and held stock tank;
(D) slurry holding in stock tank is sent into flow box 2, the slurries 3 that flow box 2 flows out flow on forming net 1 by 4 layerings of multilayer nozzle, and forming net 1 below is equipped with the blower fan suction inlet corresponding with nozzle 4 (being negative pressure suction inlet 5) and is carried out layering vacuum dehydration. Fiber laydown after dehydration forms evenly, arranges orderly lamella on forming net 1, makes glass chopped silk wet plate; When in this step, forming net 1 dewaters to glass fibre slurries, the speed of forming net 1 is 20-25 m/min;
(E) adopt pressure roller 6 laterally to roll glass fibre wet plate, make surfacing, the thickness of glass fibre wet plate is adjusted simultaneously, make glass fibre wet plate thickness be adjusted into 1.5mm;
(F) the glass fibre wet plate that completes shaping is phoresied in the conveyer belt of negative pressure of vacuum 60% moisture removal in glass fibre wet plate, glass fibre wet plate water content is controlled at below 40%;
(G) then the glass fibre wet plate of removing moisture is sent into the interior baking and curing of baking box 8, the interior temperature of baking box 8 is controlled at 280 degrees Celsius, and baking time is 15 minutes; Toast rear formation fiber glass core sheet material;
(H) cut-off footpath is the superfine glass fiber cotton that 1-4um, length are 1-5mm, and repeats above-mentioned steps (B)-(F) and obtain wet plate, and this wet plate is sent into the interior baking and curing of baking box 8, and the interior temperature of baking box 8 is controlled at 280 degrees Celsius, and baking time is 15 minutes; Toast the cotton sheet material of rear formation superfine glass fiber;
(I) according to production requirement by stacked glass fibre sheet described in multilayer and form in the middle of core; After the cotton sheet material of superfine glass fiber is laid in the both sides up and down of this centre core, carry out cutting, cut into 600mm × 600mm, obtain core material of vacuum heat insulation plate finished product.
Fig. 1, the top surface inclination setting of described forming net 1; Forming net 1 top is provided with 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, is evenly distributed with the vertical narrow slit type nozzle 4 of length direction of multiple and described forming net 1 on the base plate of diversion channel 7; Each negative pressure suction inlet 5 is oppositely arranged and is distributed in respectively downstream one side of each narrow slit type nozzle 4 with described narrow slit type nozzle 4, be beneficial to fiber in slurries and be 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 continuous production; The direction of transfer of forming net 1 end face is for from bottom to top, is beneficial to fiber laydown on described forming net and even thickness, layer distributed, most of parallel with the end face of glass fibre sheet.
As optional scheme, in described step (I), between adjacent two layers glass fibre sheet 8, or be provided with the silica bisque that 10mm is thick or adopt the compressing plate 10 of silicon dioxide powder between adjacent glass fibre sheet 8 and the cotton sheet material 9 of superfine glass fiber.
Embodiment 2
The middle core of the core material of vacuum heat insulation plate of this example is by the compound glass fibre sheet material through the moulding of wet type paper process after adopting glass chopped silk and glass fibre cotton evenly to mix, with at least alternately laminated moulding of single-layer glass fiber felt of one deck employing dry method non-woven fabrics craft moulding, then all lay the cotton sheet material of described superfine glass fiber in the upper and lower both sides of middle core, the thermal conductivity factor≤0.0025W/m.k of the vacuum heat-insulating plate of being made by this 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 that adopts the moulding of dry method non-woven fabrics craft, then all lay the cotton sheet material of described superfine glass fiber in these upper and lower both sides of centre core, the thermal conductivity factor≤0.0030W/m.k of the vacuum heat-insulating plate of being made by this core.
Above-mentioned glass mat adopts centrifugal injection method (abbreviation centrifugal process) to produce glass microfiber technique; Centrifugal process is produced glass microfiber its production technology and is comprised: raw material system, found system, fiberizing system, burning gases mixing feed system etc. Raw material is sent into glass melter after mixing according to proportioning, and the bushing of the glass metal Jing Liao road end having melted flows out, and enters sedimentator. Under the centrifuge of High Rotation Speed drives, nearly ten thousand strands of glass threads that sedimentator sidewall throws away, under the high temperature and high speed flame producing in combustion chamber by further drawing-off, cut into the fiber of certain length. First this technique be to throw away initial glass thread in the hole of spinning head perisporium, is then that the high temperature and high speed flame that combustion chamber produces carries out succeeding stretch to glass thread.
Embodiment 4
A kind of vacuum heat-insulating plate, it comprises 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 the aluminizer or the foil laminated film that vacuumize, or the bag for vacuumizing being formed by above-mentioned aluminizer or foil laminated film.
Described aluminizer comprises polyester aluminium coated 2 to 5 layers of upper and lower lamination, that 12um is thick (VMPET), and in each polyester aluminium coated (VMPET) linear low density polyethylene layer (LLDPE) bottom, that 50um is thick.
Described foil laminated film comprises nylon layer (15um), polyester aluminium coated (12um), aluminum layer (7um) and the LLDPE (50um) of upper and lower lamination successively.
Obviously, above-described embodiment is only for example of the present invention is clearly described, 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 giving exhaustive to all embodiments. And these belong to apparent variation that spirit of the present invention extended out or variation still among protection scope of the present invention.
Claims (6)
1. a preparation method for core material of vacuum heat insulation plate, comprises the steps:
(1) cut-off footpath is that 6-13um, length are the glass chopped silk that 4-20mm fiber elongation method is produced; Or getting 70-100wt%, diameter is that 6-13um, length are that glass chopped silk and 0-30wt%, the diameter that 4-20mm, fiber elongation method are produced is that 1.0-4um, length are that the glass fibre cotton that 1-5mm, flame method are produced mixes;
(2) above-mentioned glass fibre is disperseed, the stirring that then adds water, sends into pond with slurry and is diluted with water after stirring, and diluted concentration is to 0.3-1.0wt%;
(3) slurries that diluted are sent into flow box, the slurries layering that flow box flows out flows on a forming net, is evenly distributed with negative pressure suction inlet, to dewater under this forming net; Fiber laydown after dehydration on described forming net and even thickness, layer distributed, parallel with end face, forms the lamella of desired thickness, obtains wet plate;
(4) adopt pressure roller to roll above-mentioned wet plate, make its surfacing, even thickness;
(5) wet plate that completes above-mentioned steps (4) is formed to glass fibre sheet after dehydration, dry processing;
(6) cut-off footpath is the superfine glass fiber cotton that 1-4um, length are 1-5mm, and repeats above-mentioned steps (2)-(4) and obtain wet plate, this wet plate is formed after dehydration, dry processing to the cotton sheet material of superfine glass fiber;
(7) by core in the middle of stacked above-mentioned multilayer glass fibre sheet rear formation; After the cotton sheet material of superfine glass fiber is laid in the both sides up and down of this centre core, carry out cutting, make required core;
The top surface inclination setting of described forming net; Forming net top is provided with 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, is evenly distributed with the narrow slit type nozzle vertical with the length direction of described forming net on the base plate of diversion channel; Described negative pressure suction inlet is oppositely arranged and is distributed in respectively downstream one side of each narrow slit type nozzle with described narrow slit type nozzle.
2. the preparation method of core material of vacuum heat insulation plate as claimed in claim 1, 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 cotton sheet material of superfine glass fiber in described step (5) is 0.2-2mm.
3. the preparation method of core material of vacuum heat insulation plate as claimed in claim 1, is characterized in that: when in described step (3), forming net dewaters to glass layer, the speed of forming net is 12-30 m/min.
4. the preparation method of core material of vacuum heat insulation plate as claimed in claim 1, is characterized 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.
5. the preparation method of core material of vacuum heat insulation plate as claimed in claim 1, is characterized in that: described forming net is conveyor type; The direction of transfer of described forming net end face is for from bottom to top.
6. a vacuum heat-insulating plate, is characterized in that comprising: the core material of vacuum heat insulation plate that preparation method as claimed in claim 1 obtains, and be coated on aluminizer or the foil laminated film on this core material of vacuum heat insulation plate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310172558.3A CN104141859B (en) | 2013-05-10 | 2013-05-10 | A kind of core material of vacuum heat insulation plate and vacuum heat-insulating plate |
| CN201610225422.8A CN105757400B (en) | 2013-05-10 | 2013-05-10 | The vacuum heat-insulating plate of core material of vacuum heat insulation plate and its composition |
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| CN201310172558.3A CN104141859B (en) | 2013-05-10 | 2013-05-10 | A kind of core material of vacuum heat insulation plate and vacuum heat-insulating plate |
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| CN201610225422.8A Division CN105757400B (en) | 2013-05-10 | 2013-05-10 | The vacuum heat-insulating plate of core material of vacuum heat insulation plate and its composition |
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| CN104141859A CN104141859A (en) | 2014-11-12 |
| CN104141859B true CN104141859B (en) | 2016-05-11 |
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| CN105757400B (en) * | 2013-05-10 | 2017-12-08 | 江苏山由帝奥节能新材股份有限公司 | The vacuum heat-insulating plate of core material of vacuum heat insulation plate and its composition |
| CN104499588B (en) * | 2015-01-06 | 2016-03-23 | 青岛科瑞新型环保材料有限公司 | The vacuum heat-insulating plate of list structure core |
| CN107512062A (en) * | 2017-08-14 | 2017-12-26 | 华信博伟（安徽）车辆部件有限公司 | A kind of dormer window sunshading board and preparation method thereof |
| CN107639920A (en) * | 2017-09-20 | 2018-01-30 | 宣汉正原微玻纤有限公司 | A kind of compound dry method hot pressing core material of vacuum heat insulation plate of low thermal conductivity and preparation method thereof |
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