CN104294698A - Ultrastrong vacuum thermal insulation plate core material manufacturing technology - Google Patents
Ultrastrong vacuum thermal insulation plate core material manufacturing technology Download PDFInfo
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- CN104294698A CN104294698A CN201410407700.2A CN201410407700A CN104294698A CN 104294698 A CN104294698 A CN 104294698A CN 201410407700 A CN201410407700 A CN 201410407700A CN 104294698 A CN104294698 A CN 104294698A
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- slurry
- core material
- thermal insulation
- paper
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
- D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
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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
Abstract
The invention relates to the technical field of thermal insulation materials, in particular to an ultrastrong vacuum thermal insulation plate core material manufacturing technology. The ultrastrong vacuum thermal insulation plate core material manufacturing technology comprises the following steps that glass fiber is selected as the main raw material, a sizing agent is prepared, papermaking forming is carried out, drying is carried out, nitrogen heating processing is adopted, and thermal insulation paper is coiled, split, detected and subjected to vacuum pumping packaging. The thermal conductivity coefficient of ultrastrong vacuum thermal insulation plate core materials produced through the manufacturing technology is 20% to 25% that of core materials made of foaming materials in the prior art, thermal radiation and thermal conduction are reduced to a great extent, and because the manufactured core materials have the high thermal radiation prevention performance and the thermal conduction prevention performance, the usage thickness of the core materials is greatly reduced. A core material with the thickness of 10 mm is equivalent to a foaming material with the thickness of 50 mm, the thickness of vacuum thermal insulation plates is greatly reduced, and thus the cold storage space of a cold storage device can be expanded.
Description
Technical field
The present invention relates to insulation material technical field, be specifically related to a kind of superpower vacuum insulation panel core material manufacture craft.
Background technology
Vacuum insulation panel (Vacuum Insulation Panel; abbreviation VIP) be current state-of-the-art vacuum thermal insulating material in the world; be composited by filling core and vacuum protection top layer; that core good for heat-proof quality is intercepted in the good macromolecule laminated film bag of gas performance as the expanded material of aerosil and polyurethane, phenolic aldehyde, polystyrene etc. loads; formed sheet material is sealed again after vacuumizing; the heat trnasfer that it can avoid cross-ventilation to cause effectively, therefore thermal conductivity factor significantly reduces.But the expanded material used due to domestic current core major part exist some defects as: thickness is thick, and heat-insulating property is not high, the grammes per square metre problem such as heavily.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of high heat preservation performance, the thin and lightweight superpower vacuum insulation panel core material manufacture craft of thickness.
Realize technical scheme of the present invention as follows
Superpower vacuum insulation panel core material manufacture craft, comprises the steps,
The first step, selection glass fibre is main raw material, add plain boiled water and make slurry, then by beating process, the glass fibre in slurry to be beaten into diameter is 0.1um-0.3um;
Second step, adds dilute sulfuric acid in the slurry, and stirring system is made into pH value between 2.5-6.5, and concentration is the slurry of 0.1%-0.5%, and by slurry transferring in header box;
3rd step, copy paper is shaping: the slurry in header box enters in head box, and adopts fourdrinier machine, is copied to get by slurry to be shaped to sheathing paper, and wherein, the glass fibre in sheathing paper is in the space net structure aligned;
4th step, by shaping sheathing paper by temperature taper off arrange baking oven in dry, wherein, insulating paper is 10-20 ms/min by the speed of baking oven;
5th step, adopts nitrogen heat treatment by the sheathing paper after drying, and removes the gaseous impurity of sheathing paper inside and adsorption;
6th step, carries out rolling to sheathing paper, cut, detects, vacuumizes packaging.
Have employed such scheme, as the core of one of main three parts that vacuum heat-insulating plate is produced, major function has three, first supporting role, prevents VIP plate at the internal vacuum condition from shrinking, collapses flat; It two is prevent thermal-radiating generation; It three is prevent heat conducting generation.The thermal conductivity coefficient that this manufacture craft produces ultra-thin core material of vacuum heat insulation plate is the 20-25% that prior art expanded material makes core, reduce heat radiation and heat conducting generation to a great extent, because the core made has higher thermal radiation resistant and anti-heat-conductive characteristic, greatly reduce the use thickness of core, a slice thickness 10mm core of the present invention is equivalent to the expanded material that thickness is 50mm, greatly reduce the thickness of vacuum insulation panel, thus also just can increase the refrigerating space of refrigerating equipment.
Further, the slurry in second step is put into sediment dish and is carried out sediment, the assorted slag in slurry is precipitated and discharged from slurry, and the discharging slurry after sediment is in pulp storage tank.
Further, the slurry in pulp storage tank by transport pump in scummer, adopt centrifugal process to remove impurity that slurry Midst density is different from slurry, then by the slurry transferring after slagging-off to header box.
Further, the fourdrinier wire in the 3rd step in fourdrinier machine is the setting of inclination 4 °-7 °, and wherein, the initiating terminal of fourdrinier wire is higher than the end of fourdrinier wire.
Further, the baking oven of the 4th step is divided into three sections of heat tunnels, and wherein, in upstream end heat tunnel, temperature is 220 DEG C-260 DEG C, the temperature in middle heat tunnel 190 DEG C-220 DEG C, and the temperature of port of export heat tunnel is 170 DEG C-190 DEG C.
Further, adopt natural gas as heating source in described baking oven.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention;
Fig. 2 is that technological process of the present invention is specifically schemed;
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme of the present invention is further illustrated.
With reference to Fig. 1,2, superpower vacuum insulation panel core material manufacture craft, comprises the steps,
The first step, selection glass fibre is main raw material, add plain boiled water and make slurry, then by beating process, the glass fibre in slurry to be beaten into diameter is 0.1um-0.3um; Owing to requiring higher to the thickness of core and grammes per square metre, selecting glass fiber diameter to be 0.1um-0.3um high alkali glass microfiber is main raw material, the diameter of this fiber is thinner, overlap joint better effects if between shaping rear fiber, while can thickness requirement being ensured, there is lower grammes per square metre and better TENSILE STRENGTH, enough low in order to ensure the thermal conductivity coefficient of product.
Second step, adds dilute sulfuric acid in the slurry, and stirring system is made into pH value between 2.5-6.5, and concentration is the slurry of 0.1%-0.5%, and by slurry transferring in header box; During concrete preparation, slurry preparation can be become following etc. specification: pH value is 2.5, and concentration is 0.1%; PH value is 4.5, and concentration is 0.3%; PH value is 6.5, and concentration is 0.5%; PH value is 2.5, and concentration is 0.5%; PH value is 6.5, and concentration is 0.1%; Here be only list several middle specification, but be not limited to these, carry out preparing as long as be in described scope; The slurry of such pH value and concentration, and employing comprises stock mixing system, the pulp-water system of full-automatic agitator is carried out making beating 15 minutes or 18 minutes or 20 minutes, thus when ensureing fibre length, made fiber present single homodisperse state; Utilize the uniform rotation of stainless steel agitator to keep slurry evenly and not precipitate, in suspended state.
Slurry is put into sediment dish and is carried out sediment, namely can by under the assorted slag gear in slurry by sediment dish, and discharge from slurry, the sediment time is 2 minutes-8 minutes, specifically can be 2 minutes, 5 minutes or 8 minutes, needs according to sediment situation can suitably adjust, and the discharging slurry after sediment is in pulp storage tank.Then, the slurry in pulp storage tank by transport pump in scummer, adopt centrifugal process to remove impurity that slurry Midst density is different from slurry, then by the slurry transferring after slagging-off to header box.
3rd step, copy paper is shaping: the slurry in header box enters in head box, and adopts fourdrinier machine, is copied to get by slurry to be shaped to sheathing paper, and wherein, the glass fibre in sheathing paper is in the space net structure aligned; Fourdrinier wire in fourdrinier machine is the setting of inclination 4 ° or 5 ° or 6 ° or 7 °, and wherein, the initiating terminal of fourdrinier wire, higher than the end of fourdrinier wire, increases dehydrating effect and is convenient to sizing material forming.Before copy paper is shaping, adopt table roll to coordinate natural-dehydration case, namely naturally rotate extruding by table roll, letterweight is tightly dewatered, table roll rotates and is strained by fourdrinier wire, thus extrusion dehydration, under the prerequisite ensureing the production speed of a motor vehicle, accelerate dehydration: place installs vacuum additional at natural-dehydration case, vacuumize, downward water suction, sucks in dewatering box fast by the water extruded, and accelerates operating efficiency; Meanwhile, natural-dehydration case is horizontal oblong-shaped, and is longer than the width of paper, and the pre-slurry in sheathing paper adopts and is uniformly distributed, ensure profiled section laterally dehydration evenly, also ensure that product in length and breadth to the uniformity of grammes per square metre.
By the adjustment of flow, concentration and the shaping speed of a motor vehicle, wherein, flow, concentration are used to the thickness controlling paper, thus control the physical characteristic such as grammes per square metre, intensity of paper, and the speed of a motor vehicle also can control thickness and the drying time (moisture content) of paper, because the fiber in slurry space own reticulates structure, thus by the adjustment of flow, concentration and the shaping speed of a motor vehicle, paper pulp is better attached on fourdrinier wire, form uniform paper, make fiber be align, thus make product have lower thermal conductivity coefficient.
4th step, by shaping sheathing paper by temperature taper off arrange baking oven in dry, wherein, insulating paper is 10 ms/min or 15 ms/min or 20 ms/min by the speed of baking oven; The baking oven of the 4th step is divided into three sections of heat tunnels, and wherein, in upstream end heat tunnel, temperature is 220 DEG C or 250 DEG C or 260 DEG C, the temperature in middle heat tunnel 190 DEG C or 200 DEG C or 220 DEG C, and the temperature of port of export heat tunnel is 170 DEG C or 180 DEG C or 190 DEG C.Because the sheathing paper initially entered in baking oven contains a large amount of moisture content, the setting and oven temperature tapers off, initially can send the moisture content rapid steaming in sheathing paper fast like this, and can not cause damage to the fiber in sheathing paper.
Sheathing paper is in baking oven the air knife type drying system adopting and blow down suction, air knife type drying system is realized by existing air knife type dryer, make to dry wind direction like this to blow along the sheathing paper material direction of motion, ensure that sheathing paper material can not wave on oven dry guipure, position stability, to be heated evenly, hot blast penetrates simultaneously, can ensure to dry the thermal efficiency high.
Wherein, adopt natural gas as heating source in baking oven, in concrete enforcement, can arrange the combustion chamber that supplies combustion of natural gas in or beyond baking oven, the heat that burning produces is transported in the heat tunnel in baking oven.Adopt natural gas this clean energy resource can emissions reduction well, the thermal efficiency is high, quick heating, can well control the moisture content index of core, make core substantially be in absolute dry condition, be convenient to vacuumizing and vacuum service life in plate of later stage vacuum heat-insulating plate.In addition, in baking oven, be communicated with wet-emitting blower, in real time the moisture in baking oven discharged, keep the drying in baking oven.The heat of discharging in baking oven, can also adopt a circulating fan to continue to be input in baking oven, makes heat energy form continuous backflow in oven interior, and heat recovery recycles, and heat is fully utilized.
5th step, sheathing paper after drying is adopted nitrogen heat treatment, because nitrogen is that inert gas can starvation, is process in 12-24 hour by nitrogen heating heat time heating time at 110 DEG C of-130 DEG C of temperature, remove the gaseous impurity in product, improve the service life of product; Namely the gaseous impurity of sheathing paper inside and adsorption is removed; Certainly, nitrogen heat treatment also can carry out after core production completes, object is to remove inner and surperficial the adsorbed gaseous impurity of core, can complete faster when the later stage produces vacuum heat-insulating plate and to vacuumize operation, and the vacuum in the vacuum heat-insulating plate produced is held time effective increasing, the fabulous service life that improve refrigeration warehousing and transportation facilities, reduce energy consumption more.
6th step, carries out rolling to sheathing paper, cut, detects, vacuumizes packaging.Wherein, be detected as by calibrator measurement products thickness, the tension intensity of tension tester measurement products, the grammes per square metre of electronic balance measurement products, the thermal conductivity factor of thermal conductivity factor instrument measurement products.
The present invention is not limited to described embodiment, and those skilled in the art, not departing from spirit of the present invention namely openly in scope, still can do some and revise or change, therefore the scope that the scope of the present invention limits with claims is as the criterion.
Claims (6)
1. superpower vacuum insulation panel core material manufacture craft, is characterized in that, comprise the steps,
The first step, selection glass fibre is main raw material, add plain boiled water and make slurry, then by beating process, the glass fibre in slurry to be beaten into diameter is 0.1um-0.3um;
Second step, adds dilute sulfuric acid in the slurry, and stirring system is made into pH value between 2.5-6.5, and concentration is the slurry of 0.1%-0.5%, and by slurry transferring in header box;
3rd step, copy paper is shaping: the slurry in header box enters in head box, and adopts fourdrinier machine, is copied to get by slurry to be shaped to sheathing paper, and wherein, the glass fibre in sheathing paper is in the space net structure aligned;
4th step, by shaping sheathing paper by temperature taper off arrange baking oven in dry, wherein, insulating paper is 10-20 ms/min by the speed of baking oven;
5th step, adopts nitrogen heat treatment by the sheathing paper after drying, and removes the gaseous impurity of sheathing paper inside and adsorption;
6th step, carries out rolling to sheathing paper, cut, detects, vacuumizes packaging.
2. superpower vacuum insulation panel core material manufacture craft according to claim 1, it is characterized in that, slurry in second step is put into sediment dish and is carried out sediment, the assorted slag in slurry is precipitated and discharged from slurry, and the discharging slurry after sediment is in pulp storage tank.
3. superpower vacuum insulation panel core material manufacture craft according to claim 2, it is characterized in that, slurry in pulp storage tank by transport pump in scummer, adopt centrifugal process to remove impurity that slurry Midst density is different from slurry, then by the slurry transferring after slagging-off to header box.
4. superpower vacuum insulation panel core material manufacture craft according to claim 1, is characterized in that, the fourdrinier wire in the 3rd step in fourdrinier machine is the setting of inclination 4 °-7 °, and wherein, the initiating terminal of fourdrinier wire is higher than the end of fourdrinier wire.
5. superpower vacuum insulation panel core material manufacture craft according to claim 1, it is characterized in that, the baking oven of the 4th step is divided into three sections of heat tunnels, wherein, in upstream end heat tunnel, temperature is 220 DEG C-260 DEG C, temperature 190 DEG C-220 DEG C in middle heat tunnel, the temperature of port of export heat tunnel is 170 DEG C-190 DEG C.
6. the superpower vacuum insulation panel core material manufacture craft according to any one of claim 1-5, is characterized in that, adopts natural gas as heating source in described baking oven.
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| CN201410407700.2A CN104294698A (en) | 2014-08-18 | 2014-08-18 | Ultrastrong vacuum thermal insulation plate core material manufacturing technology |
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| CN201410407700.2A CN104294698A (en) | 2014-08-18 | 2014-08-18 | Ultrastrong vacuum thermal insulation plate core material manufacturing technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220074A (en) * | 2019-06-14 | 2019-09-10 | 山东信泰节能科技股份有限公司 | The method and vacuum heat-insulating plate of core material of vacuum heat insulation plate are prepared using super glass wool waste material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220074A (en) * | 2019-06-14 | 2019-09-10 | 山东信泰节能科技股份有限公司 | The method and vacuum heat-insulating plate of core material of vacuum heat insulation plate are prepared using super glass wool waste material |
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Address after: 213135, No. 36, Lijiang Road, Xixia villa town, Xinbei District, Jiangsu, Changzhou Applicant after: JIANGSU DALI ENERGY SAVING TECHNOLOGY CO., LTD. Address before: 213135, No. 36, Lijiang Road, Xixia villa town, Xinbei District, Jiangsu, Changzhou Applicant before: Changzhou Dali Energy Saving New Material Co., Ltd. |
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Application publication date: 20150121 |
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