CN104295860A - Vacuum thermal insulation panel of etching glass fiber - Google Patents

Vacuum thermal insulation panel of etching glass fiber Download PDF

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Publication number
CN104295860A
CN104295860A CN201410404191.8A CN201410404191A CN104295860A CN 104295860 A CN104295860 A CN 104295860A CN 201410404191 A CN201410404191 A CN 201410404191A CN 104295860 A CN104295860 A CN 104295860A
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China
Prior art keywords
etching
thermal insulation
glass fiber
glass fibre
insulation panel
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Application number
CN201410404191.8A
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Chinese (zh)
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CN104295860B (en
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李载润
梁京秀
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Publication of CN104295860B publication Critical patent/CN104295860B/en
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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
    • 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
    • F16L59/028—Composition or method of fixing a thermally insulating material

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Insulation (AREA)

Abstract

The invention discloses a vacuum thermal insulation panel of etching glass fiber. The vacuum thermal insulation panel comprises a glass fiber core material arranged in a high-resistance bag, and an adsorption agent, wherein a thermal insulation plate made of glass fiber through a wet method serves as the glass fiber core material, and the diameter of the glass fiber is 3 micrometers or lower. The vacuum thermal insulation panel is characterized in that etching is conducted on SiO2 in the core material through a water solution with the content of etching liquid ranging from 3wt% to 5 wt%, the content of SiO2 is decreased by 5wt% to 20wt% after etching is conducted, the etched core material becomes a structural component doing no harm to human bodies after being washed and dried, the etching liquid is formed by ammonium fluoride, hydrofluoric acid and water according to the ratio of 33-47:7-8:45-60wt%, and the etching time ranges from 10 minutes to 20 minutes. Compared with the prior art, the vacuum thermal insulation panel has the advantages of being low in heat conductivity and high in KI index, the core material, namely, the structural component, does no harm to human bodies, the thermal insulation performance and the durability of the vacuum thermal insulation panel are greatly improved, the manufacturing process is simple, machining is convenient, and the thermal insulation effect is good.

Description

A kind of vacuum heat-insulating plate of etching glass fiber
 
Technical field
The present invention relates to building thermal insulation material technical field, specifically a kind of vacuum heat-insulating plate of etching glass fiber.
Background technique
Vacuum heat-insulating plate significantly promotes heat-shielding performance by the vacuum of inside, by keeping the core of external morphology, intercepts high-isolation bag that extraneous gas and moisture flows into, absorption remove the sorbent flowing into inner gas and moisture and form.The heat-shielding performance of usual vacuum heat-insulating plate is 10 times of polyurethane, and the field being used in the insulating efficiency requirements such as refrigerator, vending machine and building high is significantly reduced energy consumption and receives much concern.Core mainly adopts fiber or the particle of porous inorganic material, and according to purposes and price choice for use, inorfil mainly uses price low, and low-thermal conductivity glass fibre of good performance is as core.Generally be divided into glass fibre (fiber diameter 3 ~ 6um), microfibril (below fiber diameter 3um), and for plastics strengthen long fibre (fiber diameter 3 ~ 9um).Glass fibre for vacuum heat-insulating plate has two dot characteristics to be very important at aspect of performance, and first is by the solid thermal conductivity that point cantact is formed in glass fiber laminates, and second is the pore size between glass fibre.Normally used glass fibre is diameter 3 ~ 9um, and now pore size is generally 40 ~ 80um, and solid thermal conductivity is more than 1mw/mk, and durability is 1/1/5th ~ ten of silica vacuum heat-insulating plate.The diameter of glass fibre adopts the microfibril of below 3um, and its little durability in aperture is strong, and pyroconductivity also significantly reduces, but because relate to the harmful problem of human body, the glass fibre of below 3um is difficult to use.Can see in EU criteria Directive 97/69/EC, below the average diameter 6um of regulation inorfil, has carcinogenic danger when not meeting the condition of zoopery or special component.The bio-soluble determining method of glass fibre utilizes KI Index or solubility constant value, KI Index: KI=(Na 2o+K 2o+CaO+MgO+B 2o 3+ BaO) – 2XAl 2o 3, general KI index is more than 40 for body harmless, but meets this structure and the physical property reaching core material of vacuum heat insulation plate is very difficult.
At present, the glass fibre structure component for vacuum heat-insulating plate is SiO 250 ~ 70 wt%; Al 2o 31 ~ 5wt%; Na 2o+K 2o 5 ~ 10wt%; CaO 5 ~ 15wt%; MgO 1 ~ 5wt%; B 2o 52 ~ 10wt%, by KI index convert obtain less than 40,6um diameter situation under be the structural component that human body is harmful.
Summary of the invention
The object of the invention is the vacuum heat-insulating plate that a kind of etching glass fiber is provided for the deficiencies in the prior art, adopt ammonium fluoride and the formulated etching solution of hydrofluoric acid, the core that the glass fibre by below diameter 3um makes is etched, to reduce SiO 2structural component in glass fibre improves KI index, realize low-thermal conductivity and core is the vacuum heat-insulating plate of body harmless's structural component, preparation process is simple, easy to process, high insulating effect, significantly improves heat-shielding performance and the durability of vacuum heat-insulating plate.
The concrete technological scheme realizing the object of the invention is: a kind of vacuum heat-insulating plate of etching glass fiber, comprise and be arranged on glass fibre core in high-isolation bag and sorbent, glass fibre core is the warming plate that the glass fibre of below diameter 3um is made in a wet process, is characterized in adopting etching solution (BOE) content to be that the aqueous solution of 3 ~ 5 wt% is to the SiO in glass fibre core 2etch, make the SiO after etching 2content in glass fibre reduces by 5 ~ 20 wt%, and the glass fibre core of etching is the structural component of body harmless after cleaning, drying; Described etching solution (BOE) is by ammonium fluoride (NH 4f) 33 ~ 47:7 ~ 8:45 ~ 60 wt% is pressed with hydrofluoric acid (HF) and water formulated; Described etching period is 10 ~ 20 minutes; Described ammonium fluoride (NH 4f) and hydrofluoric acid (HF) be chemical pure.
The present invention compared with prior art has the feature that pyroconductivity is low and KI index is high, and core material structure component is harmless, greatly improves heat-shielding performance and the durability of vacuum heat-insulating plate, and preparation process is simple, easy to process, high insulating effect.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Accompanying drawings 1, the present invention is made up of the glass fibre core 2 be arranged in high-isolation bag 1 and sorbent 3, glass fibre core 2 is the warming plate that the glass fibre of below diameter 3um is made in a wet process, will be further elaborated below by specific embodiment to etching of the present invention:
Embodiment 1
By chemical pure ammonium fluoride (NH 4f) be mixed with etching solution (BOE) with chemical pure hydrofluoric acid (HF) and water by 35:7:58 wt%, then etching solution (BOE) being diluted with water to BOE content is that the aqueous solution of 3wt% is to the SiO in glass fibre core 2 2etch, the etching solution (BOE) glass fibre core 2 being put into above-mentioned configuration soaks 20 minutes, makes SiO 2content in glass fibre is reduced to 11 wt%, etching terminates the vacuum heat-insulating plate that body harmless's structural component made by rear taking-up glass fibre core 2 after cleaning, drying, its pyroconductivity reduces about 15% after the etching, KI index is by being 32.61 bring up to 40.04 before etching, and heat-shielding performance significantly improves.
Embodiment 2
By chemical pure ammonium fluoride (NH 4f) be mixed with etching solution (BOE) with chemical pure hydrofluoric acid (HF) and water by 40:8:52 wt%, then etching solution (BOE) being diluted with water to BOE content is that the aqueous solution of 5wt% is to the SiO in glass fibre core 2 2etch, the etching solution (BOE) glass fibre core 2 being put into above-mentioned configuration soaks 20 minutes, makes SiO 2content in glass fibre is reduced to 15 wt%, etching terminates the vacuum heat-insulating plate that body harmless's structural component made by rear taking-up glass fibre core 2 after cleaning, drying, its pyroconductivity reduces about 20% after the etching, KI index is by being that 31.05 to bring up to be 40.62 before etching, and heat-shielding performance significantly improves.
Glass fibre core 2 of the present invention through etching solution (BOE) soak after, the SiO in its glass fibre 2content is etched reduction, and the content of other compositions increases relatively, makes the SiO of the microfibril of glass fibre and Vertical direction 2etched and removed, reach the effect reducing pyroconductivity, significantly improve heat-shielding performance and the durability of vacuum heat-insulating plate.More than just the present invention is further illustrated, and be not used to limit practicing of this patent, allly implements for the present invention's equivalence, within the right that all should be contained in this patent.

Claims (1)

1. the vacuum heat-insulating plate of an etching glass fiber, comprise and be arranged on glass fibre core in high-isolation bag and sorbent, glass fibre core is the warming plate that the glass fibre of below diameter 3um is made in a wet process, it is characterized in that adopting etching solution (BOE) content to be that the aqueous solution of 3 ~ 5 wt% is to the SiO in glass fibre core 2etch, make the SiO after etching 2content in glass fibre reduces by 5 ~ 20 wt%, and the glass fibre core of etching is the structural component of body harmless after cleaning, drying; Described etching solution (BOE) is by ammonium fluoride (NH 4f) 33 ~ 47:7 ~ 8:45 ~ 60 wt% is pressed with hydrofluoric acid (HF) and water formulated; Described etching period is 10 ~ 20 minutes; Described ammonium fluoride (NH 4f) and hydrofluoric acid (HF) be chemical pure.
CN201410404191.8A 2014-08-18 2014-08-18 A kind of vacuum heat-insulating plate etching glass fibre Expired - Fee Related CN104295860B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410404191.8A CN104295860B (en) 2014-08-18 2014-08-18 A kind of vacuum heat-insulating plate etching glass fibre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410404191.8A CN104295860B (en) 2014-08-18 2014-08-18 A kind of vacuum heat-insulating plate etching glass fibre

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CN104295860A true CN104295860A (en) 2015-01-21
CN104295860B CN104295860B (en) 2016-08-24

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115556440A (en) * 2021-07-02 2023-01-03 青岛海尔电冰箱有限公司 Acid treatment process of core material and vacuum insulation panel with acid-treated core material

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1425116A (en) * 2000-04-21 2003-06-18 松下冷机株式会社 Vacuum insulating material and device using the same
JP2008023932A (en) * 2006-07-25 2008-02-07 Dainippon Printing Co Ltd Vacuum heat insulating material
CN101691899A (en) * 2009-10-01 2010-04-07 福建赛特新材料有限公司 Composite core material vacuum insulation panel and preparation method thereof
CN102330871A (en) * 2011-07-13 2012-01-25 苏州维艾普新材料有限公司 Vacuum heat insulation plate core material and manufacturing method thereof
CN102711394A (en) * 2012-06-25 2012-10-03 广州美维电子有限公司 Electroplating interconnecting processing technology for circuit board
JP2013021260A (en) * 2011-07-14 2013-01-31 Sony Corp Electromagnetic wave absorbing material, method of producing the same, flexible printed wiring board and electronic device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1425116A (en) * 2000-04-21 2003-06-18 松下冷机株式会社 Vacuum insulating material and device using the same
JP2008023932A (en) * 2006-07-25 2008-02-07 Dainippon Printing Co Ltd Vacuum heat insulating material
CN101691899A (en) * 2009-10-01 2010-04-07 福建赛特新材料有限公司 Composite core material vacuum insulation panel and preparation method thereof
CN102330871A (en) * 2011-07-13 2012-01-25 苏州维艾普新材料有限公司 Vacuum heat insulation plate core material and manufacturing method thereof
JP2013021260A (en) * 2011-07-14 2013-01-31 Sony Corp Electromagnetic wave absorbing material, method of producing the same, flexible printed wiring board and electronic device
CN102711394A (en) * 2012-06-25 2012-10-03 广州美维电子有限公司 Electroplating interconnecting processing technology for circuit board

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115556440A (en) * 2021-07-02 2023-01-03 青岛海尔电冰箱有限公司 Acid treatment process of core material and vacuum insulation panel with acid-treated core material
CN115556440B (en) * 2021-07-02 2024-01-05 青岛海尔电冰箱有限公司 Acid treatment process of core material and vacuum insulation panel with acid treated core material

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Granted publication date: 20160824

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