CN105274728A

CN105274728A - Biological soluble fiber mat, preparation method thereof and vacuum insulated panel using mat

Info

Publication number: CN105274728A
Application number: CN201410229814.2A
Authority: CN
Inventors: 杨胜利; 林琦海; 陈艳华; 张昆明
Original assignee: FUJIAN SUPERTECH ADVANCED MATERIAL Co Ltd
Current assignee: FUJIAN SUPERTECH ADVANCED MATERIAL Co Ltd
Priority date: 2014-05-28
Filing date: 2014-05-28
Publication date: 2016-01-27
Anticipated expiration: 2034-05-28
Also published as: CN105274728B; WO2015180660A1

Abstract

The invention relates to a biological soluble fiber mat, a preparation method thereof and a vacuum insulated panel using the mat. The mat is a fiber mat containing biological soluble fibers including 85-100wt% of biological soluble fibers and 0-15wt% of cured adhesives. The biological soluble fibers penetrate through one another and intertwine or are in overlapping joint in the form of single filaments or distributed in an interwoven mode. Few biological soluble fibers extend close to the thickness direction of the mat. The adhesives are dispersed among signal filaments, closely adhered to one another and do not independently exist. The average fiber diameter of a biological soluble fibers is less than or equal to 30 [mu]m and the average fiber length is less than or equal to 250 mm. Harm of fiber dust generated during manufacture and usage of the fiber mat to human bodies can be effectively avoided.

Description

A kind of biosoluble fibres felt and preparation method thereof and the vacuum heat-insulating plate using this felt

Technical field

The present invention relates to a kind of heat-insulating material and preparation method thereof and the insulation product using this heat-insulating material.

Background technology

Vacuum heat-insulating plate (English full name VacuumInsulationPanel, hereinafter referred to as VIP) is primarily of core material (hereinafter referred to as core), barrier bag and getter composition, and its structure is as shown in Fig. 1 and Fig. 1-1.Barrier bag 11 is mainly the packaging bag that macromolecule membrane forms with special coating film or aluminium foil compound, is the critical component of VIP, plays gas such as obstruct air, aqueous vapor etc. and enters in bag, to reach the object of vacuum insulation; There is edge sealing 10 at the edge of barrier bag 11.Core 12 is cores of VIP, and it forms by multilayer felt 121 is stacked, plays skeletal support, reduces heat transfer and be conducive to the effects such as degassed; Getter 13 is mainly calcium oxide type getter or alloy getter or calcium oxide and alloy getter, it is the vitals of VIP, play absorb residual gas (comprising aqueous vapor, air etc.) in bag, packaging bag leaks into gas (comprising aqueous vapor, air etc.) in bag, to maintain or to improve vacuum in bag further, reduce gas heat-transfer to the impact of VIP overall performance.Wherein, thermal conductivity factor is used to the key index weighing the overall heat-insulating property of VIP, and thermal conductivity factor height is then adiabatic poor, otherwise, then adiabatic good.

In the core of current VIP, felt do not dissolved by biology or more insoluble fiber (mainly based on manmade inorganic fibre, as cotton in glass wool, ore deposit (rock) etc.) formed by damp process or dry process manufacture, because heatproof is higher, matter hard, fire prevention, cost is lower, thermal conductivity factor is better etc. and obtain industry and pay much attention to and application.Especially with traditional glass wool in artificial mineral matter fiber (English full name ManMadeMineralFibres, be called for short MMMF) and or traditional ore deposit (rock) cotton undertaken manufacturing this felt by wet therapy forming process for main skeleton structure material.

Traditional glass wool, ore deposit (rock) cotton all belong to non-continuous glass fibers.Non-continuous glass fibers refers to that the glass metal of melting is also finally cooled to thinner line segment formula glassy state fiber by external force (as air-blowing, roller get rid of) effect after flowing out from molten bath or smelting furnace.But, all create a large amount of fibre dusts from the operation such as manufacture, secondary operations, wet moulding process, core cutting, packaging of traditional glass wool, ore deposit (rock) cotton, these fibre dusts will be suspended in the middle of operating space and neighbouring air within a certain period of time.Because the wire diameter of these fibre dusts is mostly below 3 μm, very likely sucked by organism (comprising human body).These fibre dusts also mostly do not dissolve or comparatively indissoluble solution in vivo, be easy to cause organism inflammation and pathology etc., MMMF is categorized as the 2B group (possible carcinogenic substance) of carcinogenic danger degree grouping by the international cancer research institution (IARC) being under the jurisdiction of the World Health Organization (WHO).

Biosoluble fibres refer to can dissolve quickly in the physiology lung liquid of circulation or body fluid, the product that shape is and this shape is such as degraded absorbs by organism or gets rid of external by organism repeats itself system and organism do not produced to a fibrid of harm.Biosoluble fibres can be biological soluble organic fiber, biological soluble inorfil and biological soluble composite fibre etc., and its existence form can be cotton (wadding) shape or short pencil.

In biosoluble fibres, the percetage by weight of inorfil (comprising mineral wool, rock wool, glass wool, glass fibre, refractory fibre, ceramic fibre etc.) each composition generally also exists (Na ₂o+K ₂o+CaO+MgO+BaO) > 18wt% and/or [(Na ₂o+K ₂o+CaO+MgO+BaO+B ₂o ₃)-2* (Al ₂o ₃)] > 40wt%.The most biological soluble better performances of such biological soluble inorfil, comparatively fast can dissolve and be eliminated after entering human body or organism, and the harmfulness produced human body or organism can be minimum.Biological soluble inorfil (Na ₂o+K ₂o+CaO+MgO+BaO) > 18wt% is at Regulation (EC) No12722008, Directive67/548/EEC, Directive97/69/EC and German RAL certification authority (GutegemeinschaftMineralwolleE.V. (GGM) ofFrankfurt (Associationforthequalityofmineralwool http:// www.ral-mineralwolle.de)) be all mentioned; (Na ₂o+K ₂o+CaO+MgO+BaO) > 18wt% represents fiber and is non-carcinogenic thing but may carcinogenic substance or be not categorized as carcinogenic substance., point out in German relevant laws and regulations TRGS905, section2.3, as long as biological soluble inorfil [(Na meanwhile ₂o+K ₂o+CaO+MgO+BaO+B ₂o ₃)-2* (Al ₂o ₃)] > 40wt% can confirm as and not be categorized as carcinogenic substance.Define in TRGS905

KI=[(Na ₂o+K ₂o+CaO+MgO+BaO+B ₂o ₃)-2* (Al ₂o ₃)] * 100, in formula, each oxide is percetage by weight, therefore KI > 40 and [(Na ₂o+K ₂o+CaO+MgO+BaO+B ₂o ₃)-2* (Al ₂o ₃)] > 40wt% is the same meaning.

In order to judge that fiber substance whether may be carcinogenic, currently in the world whether meeting the requirement of explaining Q in Directive97/69/EC and European Parliament and European Council No. 1272/2008 regulation (classification of material and mixture, label and Package Ordinances) using it and/or meeting German RAL authentication requesting and/or biological soluble effect as criterion.Whether meet European Parliament and European Council No. 1272/2008 regulation (classification of material and mixture, label and Package Ordinances) explain the requirement of Q can by EUCEB (EuropeanCertificationBoardForMineralWoolProducts, mineral wool product Europe certification committee) carry out certification, namely represent that fiber does not belong to possibility carcinogenic substance if met, harm is not formed to organism.Whether meet German RAL authentication requesting can by German RAL certification authority GGM (GutegemeinschaftMineralwolleE.V. (GGM) ofFrankfurt (Associationforthequalityofmineralwool, http:// www.ral-mineralwolle.de)) carry out certification, if by namely representing that fiber does not belong to possibility carcinogenic substance, do not form harm to organism.Biological soluble effect can by constant of dissolution rate K _dis(specific as follows described) judges, works as K _dis>=100ng/ (cm ².hr) namely represent that fiber does not belong to possibility carcinogenic substance, harm is not formed to organism.

Biological soluble effect is by the constant of dissolution rate K of fiber in simulation Human Lung liquid _discharacterize, constant of dissolution rate computing formula is as follows:

K_{dis} = \frac{d_{0} ρ \sqrt{1 - M / M_{0}}}{2 t} - - - (1)

In formula: d ₀for fiber initial diameter;

ρ is fiber initial density;

M ₀for fiber initial mass;

M is remaining quality after Fibrinolysis;

T is minute.

Constant of dissolution rate K _dis(unit: ng/ (cm ².hr)) can be obtained by above formula (1) laboratory facilities, according to the K calculated _disjust can estimate the time of staying of fiber in lung liquid.By linear regression method, Half-life t can be obtained _0.5with K _disrelationship as follows:

t _0.5＝e ^3.79×K _dis ^-0.708--------(2)

Half-life t is calculated by formula (2) _0.5, compare with the Half-life in EU criteria, the biological soluble of assessment fiber.

Simulation Human Lung liquid adopts Gamble solution usually, and its composition refers to table 1.The pH value controlling solution during obtain solution is 7.35 ~ 7.45 (pH values of Human Lung liquid), according to the requirement of pH value, can carry out suitable modification to this solution.

The chemical composition (1000ml) of table 1 standard Gamble solution

Chemical composition	Quality (g)	Purity (%)
			MgCl ₂·6H ₂O	0.212	≥98.0
NaCl	6.415	≥99.5
			Na ₂HPO ₄	0.148	≥99.0
Na ₂SO ₄·2H ₂O	0.179	≥99.0
			CaCl ₂·4H ₂O	0.318	≥96.0
NaHCO ₃	2.703	≥99.8
			Sodium tartrate	0.180	≥98.0
Natrium citricum	0.186	≥99.0
			Sodium lactate	0.175	50.0～60.0
Sodium Pyruvate	0.172	≥99.0
			Glycine	0.118	≥99.0

Selected chemical reagent is chemical pure

Fiber is simulating the solubility experiment device of Human Lung liquid (Gamble solution) as shown in Figure 2.Fill the container placed in the tank of water and fill simulation Human Lung liquid (Gamble solution).The bottom of container is stretched in one end of first pipeline, and the other end is communicated with the import of electronic peristaltic pump, and the outlet of electronic peristaltic pump fills the import of the test tube bottle of tested fiber (fiber powder).The exit of test tube bottle is established filter cotton and is communicated to container through second pipe.

Tested fiber (fiber powder) at the test process of simulation Human Lung liquid (Gamble solution) is: by tested fiber (fiber powder) (for compared with long fiber through grind to form critical granularity be 100 μm Powdered after) get 1g and put into test tube bottle, fiber is made to be immersed in Gamble solution, controlling solution temperature is 36.5 ~ 37.5 DEG C, and flow control carries out the solubility experiment of fiber at 15ml/h.Experimental period is respectively 72h.Collect Gamble solution 10ml every 24h in course of dissolution, measure the ion concentration in solution with inductive coupling plasma emission spectrograph (ICP-AES).After experiment terminates, after the fiber in test tube bottle is calcined after filtration, the quality after Accurate Measurement dissolves.

Biosoluble fibres shows obvious solubility property after soaking in Gamble solution, Fig. 3 and Fig. 4 shows and dissolve forward and backward true effect.

Whether biosoluble fibres meets German RAL authentication requesting is required to carry out confirming according to GGM mineral wool product quality authentication and test program the 2.1st part (QualityassuranceandtestspecificationsoftheG ü tegemeinschaftMineralwollee.V.forproductsmadeofmineralwo ol, section2.1) by German RAL certification authority GGM." QualityassuranceandtestspecificationsoftheG ü tegemeinschaftMineralwollee.V.forproductsmadeofmineralwo ol " can in its official website http:// www.ral-mineralwolle.decheck in.

The requirement of Q (NoteQ) is explained by European Parliament and European Council No. 1272/2008 regulation (REGULATION (EC) No1272/2008OFTHEEUROPEANPARLIAMENTANDOFTHECOUNCIL) (classification of material and mixture, label and Package Ordinances): as long as meet one of following four kinds of situations can confirm that surveyed thing is non-carcinogenic thing.

One, the Half-life of the fiber of imbedibility short-term biopersistence test display length more than 20 μm is less than 10 days;

Two, the Half-life of the fiber of tracheal instillation method short-term biopersistence test display length more than 20 μm is less than 40 days;

Three, in suitable abdominal cavity, test display is without extra carcinogenic;

Four, suitable long-term imbedibility test display is without related pathogenic or canceration.

Above-mentioned situation two specifically can take lung to inject results from residue tests method: by tracheal instillation by the fiber of 2mg length more than 20 μm or WHO fiber (L > 5 μm, D < 3 μm, L/D > 3/1) inject in every mouse body, collect the residual fibers related data instiled in latter 3 months to analyze, the Half-life of fiber in experimental mouse lung can be obtained.(note: WHO is the english abbreviation of the World Health Organization, and L is fibre length, and D is fibre diameter)

As can be seen here, these are very likely formed potential risk to health by the fibre dust that human body sucks, and the possibility causing respiratory tract, lung and other internal organs or tissue that pathology occurs increases.Thus, find a kind of fibrofelt of health environment-friendly, both can as the core of VIP, the fibre dust that can produce in its manufacture process, application process and Dismantlement process again all effectively can be avoided or effectively reduce working the mischief to health, will be the sector problem comparatively protruded that people-oriented, large-scale production faces.

Summary of the invention

The present invention aims to provide a kind of biosoluble fibres felt, can effectively avoid or effectively reduce the harm that the fibre dust that produces in manufacture process, application process and Dismantlement process causes health, can reach again and reduce costs, put forward high performance effect.

Another object of the present invention is to provide the preparation method of above-mentioned biosoluble fibres felt.

Still a further object of the present invention is to provide a kind of vacuum heat-insulating plate using above-mentioned felt.

Technical scheme of the present invention is: a kind of biosoluble fibres felt, the fibrofelt containing biosoluble fibres; The wherein adhesive 0 ~ 15wt% of biosoluble fibres 85 ~ 100wt%, solidification; Biosoluble fibres with monofilament form phase IPN around overlap joint or interweave distribute and form the space be interconnected; Adhesive to be dispersed between monofilament and to bond closely with them, not individualism; Biosoluble fibres fiber diameter is≤30 μm, average fiber length is≤250mm; Biosoluble fibres refers to the constant of dissolution rate K in simulation Human Lung liquid _dis>=100ng/ (cm ².hr); Percetage by weight (the Na of inorfil (comprising mineral wool, rock wool, glass wool, glass fibre, refractory fibre, ceramic fibre etc.) each composition in biosoluble fibres ₂o+K ₂o+CaO+MgO+BaO) > 18wt% and/or [(Na ₂o+K ₂o+CaO+MgO+BaO+B ₂o ₃)-2* (Al ₂o ₃)] > 40wt%.

Biosoluble fibres can be obtained by centrifugal process or flame method or fiber elongation method or spin processes.Centrifugal process is generally that melting or dense molten feed liquid are got rid of thread through centrifuge after discharging opening flows out, is more vertically jetted by high velocity air and be finally cooled to more fine fibre.Flame method is generally that melting or dense molten feed liquid are first cooled to crude fibre after discharging opening flows out, is more vertically jetted by high-speed flame and be finally cooled to more fine fibre.The fiber that centrifugal process and flame method obtain is discontinuous fiber, and fiber shape is generally irregular, and goods mostly in flocculence, therefore have the title of centrifugal cotton, flame cotton.Fiber elongation method is generally finally be cooled to thinner continuous fibrous by the gravitation drawing-off effect that pulls down of certain speed after melting or dense molten feed liquid flow out from discharging opening, i.e. continuous fibers.Spin processes generally refers to that melting or dense molten feed liquid become thinner continuous fibers from after discharging opening flows out the process of being stretched or through air or through water or through coagulating bath or hot-air or hot inert gas cooling curing.Continuous fibers also can form fibre bundle (or claiming fiber strand, precursor) by multifilament in the fabrication process together, is beneficial to steady production like this and improves output.Monofilament, as the term suggests, refer to the meaning of an independent fiber.Staple fiber is formed by certain length cut-out through cutting off machine by continuous fibers, and also someone is referred to as " short chopping ".

Biosoluble fibres can obtain biological soluble staple fiber or cotton fiber by said method, and its fiber diameter≤30 μm, average fiber length are≤250mm.Fiber diameter as fruit fiber is greater than 30 μm, and in same thickness fiber mat product, the fiber number of plies reduces, and heat-transfer path shortens, skeleton heat transfer increases, interfibrous space obviously increases simultaneously, and between gas molecule, collision probability increases mutually, and total heat-proof quality is deteriorated.If fibre length is greater than 250mm, felt process is dispersed into monofilament and has any problem, and fiber utilization rate declines.

In biosoluble fibres, slag ball content is preferably at below 10wt%.What slag ball referred to that particle diameter in fiber (cotton) is greater than 0.25mm is not made into the granular, block of fiber and club etc.Slag ball content should be as far as possible low, if pomace ball content is more than 10%, production process uses scummer to be difficult to remove completely, still can some remain in fiber mat product, and manufacture in the operation of VIP the barrier package bag very likely piercing through or stab outside core afterwards, affect the heat-proof quality of VIP.

Biosoluble fibres also likely adds a small amount of sizing agent by said method manufacture process, is beneficial to fiber (precursor) and manufactures and application (comprise and make fibrofelt).Sizing agent can be had an effect with fiber surface or combine, and protection fiber not easily forms fracture of wire or lousiness or filoselle.Sizing agent is mostly more expensive, and unfavorable to fiber dispersion containing adhesive component, so the content that sizing agent accounts for fiber is generally no more than 2.5wt%.

Biosoluble fibres can be biological soluble organic fiber or biological soluble inorfil or biological soluble composite fibre.Biological soluble organic fiber is as biological soluble regenerated celulose fibre, biological soluble PGA (PGA) fiber, biological soluble chitin and derivant fiber thereof etc.Biological soluble inorfil is as biological soluble rock wool, biological soluble glass wool, biological soluble glass fibre, biological soluble refractory fibre, biological soluble ceramic fibre etc.Biological soluble composite fibre is as inorganic in biological soluble inorganic-polymer blended fiber, biological soluble covers polymer fiber etc. outward.

The biological soluble of biosoluble fibres refers to that the product of the behaviors such as fiber can dissolve quickly in the physiology lung liquid of circulation or body fluid, degraded and this behavior is absorbed by organism or gets rid of external by organism repeats itself system and organism do not produced to the performance endangered.Biosoluble fibres all possesses good biological soluble.

This biosoluble fibres is except possessing good biological soluble performance, can enter after in organism dissolved fast, decompose finally be eliminated out external, preferably also should have few, the easy fibroblast of crystallization, fragility low and in fibrofelt manufacture process not facile hydrolysis, the molten feature such as disconnected.

Although certain adhesive may be there is in felt of the present invention, also harm can not be formed to health.Because: adhesive generally all bonds with biosoluble fibres, not individualism; And, after the biosoluble fibres being bonded with adhesive is sucked by human body, its overwhelming majority be due to the content of biosoluble fibres binding agent is on the surface few so that between fiber adhesion strength poor, easily hit by external force, and this biosoluble fibres constantly can be dissolved because of the exposed region of fiber surface very major part non-rubber cover stick, be fragmented into more carefully short fiber or fragment is finally cleared out of in body by human body.

The constant of dissolution rate preferred K of biosoluble fibres in felt of the present invention in simulation Human Lung liquid Gamble solution _dis>=100ng/ (cm ².hr), be easier to be dissolved in biological fluid, be unlikely to form harm to organism.In biosoluble fibres, the percetage by weight of inorfil (comprising mineral wool, rock wool, glass wool, glass fibre, refractory fibre, ceramic fibre etc.) each composition also meets (Na ₂o+K ₂o+CaO+MgO+BaO) > 18wt% and [(Na ₂o+K ₂o+CaO+MgO+BaO+B ₂o ₃)-2* (Al ₂o ₃)] > 40wt%.So the harm that the fibre dust that produces in manufacture process, application process and Dismantlement process causes health can effectively be avoided or effectively reduce to felt of the present invention.

The manufacture of biosoluble fibres to felt plays the key effect of skeleton, and the existence of adhesive can make felt be more conducive to manufacture and application but dispensable.When biosoluble fibres with monofilament form phase IPN around or overlap joint or interweave and distribute and form the fibrofelt of sufficient intensity, and can meet manufacture and needed for applying, interpolation adhesive can not be needed.When biosoluble fibres with monofilament form phase IPN around or overlap joint or interweave distribute and the intensity forming fibrofelt can not meet and manufactures and needed for application, then need interpolation adhesive to improve the final strength of fibrofelt.The ratio of adhesive shared by felt should be as far as possible low when meeting production intensity, to reduce the adhesive heat transfer that abutting edge is formed between felt internal fiber and to avoid or reduce the labile element that may exist in adhesive discharging caused gas heat-transfer under vacuo.We find through a large amount of arduous experiments, when the ratio that adhesive accounts for felt is greater than 15wt%, the adhesive area coverage of abutting edge and volume of adhesive between felt internal fiber all increase, and the labile element that may exist in adhesive more release under vacuo, make felt under vacuo heat-proof quality obviously decline.

Described adhesive is one or more the combination in liquid-type adhesive or powder-type adhesive.Adhesive can be inorganic adhesive or organic adhesion agent.Liquid-type adhesive preferably can carry out interworking with water or solvent again, has good mobility and concentration controllability, can have the aspect demands such as uniformity, impregnability, operability and cyclicity concurrently; Generally have longer storage period at normal temperatures, more stable, production practicality is good.Powder-type adhesive preferably powder particle is comparatively thin, and granular size is best at below 1mm, and such powder is just easy to be evenly dispersed in fibrofelt.

TOVC (TVOC) content of described adhesive is preferably below 120g/L, and benzene, toluene, ethylbenzene, dimethylbenzene summation are below 300mg/Kg, and free formaldehyde is below 100mg/Kg.Like this, TOVC can remove quickly in adhesive solidification process and VIP manufacture process, discharges again, thus ensure that the performance of VIP is best and stable to avoid or to reduce as far as possible in VIP.

The preparation method of biosoluble fibres felt can be dry-type centrifugal method or dry type combing method or wet type acid system or wet type glue method.

Dry-type centrifugal method comprises following steps:

Step one, biological soluble melting or dense molten feed liquid enter the spinning head of High Rotation Speed, and are thrown out of from the pore of spinning head after flowing out from discharging opening; Spinning head rotating speed preferably at more than 500r/min, to ensure that feed liquid has enough power to be thrown away by from the pore on spinning head; The pore size of spinning head is preferably at more than 0.5mm, and such feed liquid flow resistance on pore is unlikely too little and be convenient to be thrown away from the pore on spinning head;

Step 2, the feed liquid thrown away vertically are jetted by the high velocity air of pore periphery, and feed liquid is blow molded into thinner further; High velocity air can be high-speed flame or high velocity, hot air;

Step 3, thinner feed liquid cool to obtain biosoluble fibres in the process flying to waft; In cooling procedure or impose adhesive and/or sizing agent; Cooling can adopt nature to cool or air-cooled or spraying;

Step 4, biosoluble fibres are collected to obtain biosoluble fibres felt by the negative pressure collection web band with spinning head right opposite, then to pressurize (1 ~ 50Kg/cm to fibrofelt ²) shape or heating (100 ~ 500 DEG C) pressurization (1 ~ 50Kg/cm ²) sizing, obtain comparatively closely knit biosoluble fibres felt;

Or, biosoluble fibres is collected to obtain biosoluble fibres felt by the negative pressure collection web band with spinning head right opposite, rear feeding glue system, the methods such as sprinkling, pouring leaching and impregnation are adopted to impose adhesive, and found time to regulate the content of adhesive on fibrofelt by negative pressure, again pressurization sizing carried out to fibrofelt and/or enter drying tunnel heating (oven dry) sizing, finally carrying out pressurization sizing or heating pressurization sizing again, obtain comparatively closely knit biosoluble fibres felt; Heating-up temperature is 100 ~ 500 DEG C, and moulding pressure is 1 ~ 50Kg/cm ², drying tunnel temperature is 100 ~ 400 DEG C; Adhesive is liquid-type adhesive or powder-type adhesive.The membership that adds of adhesive is present between fiber, and tight with fibres bond, thus can lock fibre structure largely, and the fibrofelt for still easily bounce-back after heating pressurization can play obvious improvement result.

This step obtains fibrofelt, fiber diameter≤30 μm, and average fiber length is≤250mm, adhesive content≤15wt%, size content≤2.5wt%.The below collecting web band connects evacuator, and evacuator preferably does subregion and arranges and regulate, and to make to form the negative pressure be evenly distributed above guipure, the biosoluble fibres felt thickness of gained is even, surface is more smooth.Negative pressure below guipure, preferably at below 5000Pa, is conducive to ensureing to form obvious negative pressure above guipure like this.

Through Comparability test, preferably again fibrofelt is pressurizeed (1 ~ 50Kg/cm in above step 4 ²) shape or heating (100 ~ 500 DEG C) pressurization (1 ~ 50Kg/cm ²) sizing, the biosoluble fibres felt obtained like this is comparatively closely knit, and shape is more well-behaved, and the intensity of fibrofelt is also better.The fibrofelt that comparatively closely knit fibrofelt is relatively freely fluffy, thickness obviously reduces more than 1/3, effectively can save the size of VIP barrier bag; Comparatively closely knit fibrofelt simultaneously shape also more well-behaved, intensity is also better, is conducive to the encapsulation operation of fibrofelt application VIP and the subsequent applications of VIP.

Dry type combing method comprises following steps:

Step one, biosoluble fibres (cotton) is dropped into bale opener, shredding unit carry out the thick shredding of fiber; Bale opener can shredding bale packing fiber; Shredding unit can comprise pre-opener and refined opener, can do further shredding to fiber; Shredding unit is preferably furnished with slag removing system, can remove the slag ball or impurity that may contain in fiber like this, to ensure quality of item;

Step 2, can by cotton feeder uniform lamelliform biosoluble fibres felt of sending into that carding machine carries out more complete shredding, combing must distribute by the biosoluble fibres after thick shredding; Cotton feeder can be vibration cotton feeder or air pressure cotton feeder, further for thick opening fiber shredding can be mixed and transfer out uniform carpet veneer (cotton layer); Carding machine can be single cylinder double doffer card or double cylinder and double doffer carding machine, can by fiber carding assembly single-fiber state; Cotton feeder or carding machine are preferably furnished with slag removing system, can remove the slag ball or impurity that may contain in fiber like this, to ensure quality of item; Also step 3 and step 4 can be carried out again;

Step 3, lamelliform fibrofelt is gone to lapping machine carry out lapping, obtain more than 2 layers stacked biosoluble fibres felts; Lapping machine can be clamping lapping machine or cross lapping machine;

Step 4, more than 2 layers stacked biosoluble fibres felts are sent into acupuncture unit by drawing machine carry out acupuncture sizing, or water thorn system carries out the sizing of water thorn, or hot pressing (rolling) unit carries out heating (100 ~ 500 DEG C) pressurization (1 ~ 50Kg/cm ²) sizing, obtain comparatively closely knit biosoluble fibres felt; Drawing machine can improve the output speed of felt after lapping; Needing machine can be low speed needing machine or middle-speed stitching machine or high-speed needling machine, and punch frequency is preferably at 1500 times/below min; Water thorn system comprises spun-laced machine group, dewatering box and drying unit; Hot pressing (rolling) machine can be double roller calender.Acupuncture or water thorn density are preferably 100 thorns/cm ²below, such fibrofelt is beneficial to except subsequent applications except obtaining enough intensity, in fibrofelt, fiber is also unlikely to be formed in a thickness direction too much distribution and interweaves, thus can control the heat transfer of less fiber toward thickness direction, ensure that fibrofelt heat-insulating property in VIP.Acupuncture or water thorn density refer to that fibrofelt is at every square centimeter of (cm ²) by the number of times of acupuncture or water thorn, acupuncture or water thorn density larger expression fiber thickness direction distribution with interweave more severe, fiber is easier toward the heat transfer of thickness direction then, and the thermal and insulating performance of fibrofelt also will be deteriorated.

Step 4 also can complete like this: 2 layers and biosoluble fibres felt stacked are above sent into glue system, the methods such as sprinkling, pouring leaching and impregnation are adopted to impose adhesive, and found time to regulate the content of adhesive on fibrofelt by negative pressure, again pressurization sizing carried out to fibrofelt and/or enter drying tunnel heating (oven dry) sizing, finally carry out pressurization sizing or heating pressurization sizing again, obtain comparatively closely knit biosoluble fibres felt; Heating-up temperature is 100 ~ 500 DEG C, and moulding pressure is 1 ~ 50Kg/cm ², drying tunnel temperature is 100 ~ 400 DEG C; Adhesive is liquid-type adhesive or powder-type adhesive.The membership that adds of adhesive is present between fiber, and tight with fibres bond, thus can lock fibre structure largely, and the fibrofelt for still easily bounce-back after heating pressurization can play obvious improvement result.

Adhesive can certainly be considered to add in step one and/or step 2, such adhesive can disperse between the fibers more uniformly, and then carry out heating pressurization sizing and/or enter drying tunnel heating (oven dry) shaping to fibrofelt, obtain comparatively closely knit biosoluble fibres felt.But because fiber with devices such as shredding pin, teeth in opener or carding machine, violent frictional heating occurs more continually in the opening processes of step one, step 2, easily make adhesive premature cure or fusing and cause the device such as fiber and shredding pin, tooth to bond, finally cause opener or carding machine shredding deleterious or blocking etc., therefore had better not add adhesive in step one and/or step 2.

Same, through Comparability test, preferably again fibrofelt is pressurizeed (1 ~ 50Kg/cm in above step 4 ²) shape or heating (100 ~ 500 DEG C) pressurization (1 ~ 50Kg/cm ²) sizing, the biosoluble fibres felt obtained like this is comparatively closely knit, and shape is more well-behaved, and the intensity of fibrofelt is also better.The fibrofelt that comparatively closely knit fibrofelt is relatively freely fluffy, thickness obviously reduces more than 1/3, effectively can save the size of VIP barrier bag; Comparatively closely knit fibrofelt simultaneously shape also more well-behaved, intensity is also better, is conducive to the encapsulation operation of fibrofelt application VIP and the subsequent applications of VIP.

Wet type acid system comprises following steps:

Step one, biosoluble fibres (cotton) put in beater and pulls an oar in plain boiled water, obtain finely dispersed slurry; The pH value of plain boiled water is 2 ~ 4; Plain boiled water contains sulfuric acid or hydrochloric acid, to regulate pH value; Beating consistency, preferably at below 10wt%, is beneficial to fiber dispersion, unwinds;

Step 2, slurry diluted further after or carry out upper net forming through scummer feeding forming machine, and after carrying out forced negative pressure dehydration shaping, obtain half wet or light wet biosoluble fibres felt; Fibre concentration after slurry dilutes further is preferably below 2wt%, is beneficial to molding effect and stablizes; The moisture percentage of fibrofelt, preferably at below 75wt%, is beneficial to and reduces drying plant cost and energy-conservation; Forming machine is inclined-wire form machine or cylinder forming machine; Scummer is generally centrifugal slagging-off, can remove the slag ball or impurity that may contain in fiber, to ensure quality of item;

Step 3, by half, wet or light wet biosoluble fibres felt is delivered in baking oven (road) and dries, and obtains biosoluble fibres felt; The temperature range of baking oven (road) is preferably 100 ~ 400 DEG C.

Wet type glue method comprises following steps:

Step one, biosoluble fibres (cotton) are put in beater and are pulled an oar in plain boiled water, obtain finely dispersed slurry; Viscosity≤the 60mpa.s of plain boiled water; One or more during described plain boiled water contains (thickener, dispersant, defoamer, preservative agent and adhesive); In plain boiled water, the active constituent content of each additive is preferably 0 ~ 1wt% thickener, 0 ~ 0.2wt% defoamer, 0 ~ 1wt% dispersant, 0 ~ 0.2wt% preservative agent and 0 ~ 1wt% adhesive;

Step 2, slurry diluted further after or carry out upper net forming through scummer feeding forming machine, and after carrying out forced negative pressure dehydration shaping, obtain half wet or light wet biosoluble fibres felt; Fibre concentration after slurry dilutes further is preferably below 2wt%, is beneficial to molding effect and stablizes; The moisture percentage of fibrofelt, preferably at below 75wt%, is beneficial to and reduces drying plant cost and energy-conservation; Scummer is generally centrifugal slagging-off, can remove the slag ball or impurity that may contain in fiber, to ensure quality of item;

Or, after being diluted further by slurry, then add adhesive, after mixing or through scummer feeding forming machine, carry out upper net forming, and after carrying out forced negative pressure dehydration shaping, obtain half wet or light wet biosoluble fibres felt; Fibre concentration after slurry dilutes further is preferably below 2wt%, is beneficial to molding effect and stablizes; The moisture percentage of fibrofelt, preferably at below 75wt%, is beneficial to and reduces drying plant cost and energy-conservation; Scummer is generally centrifugal slagging-off, can remove the slag ball or impurity that may contain in fiber, to ensure quality of item;

Or, after being mixed with adhesive by slurry, then after diluting further, or carry out upper net forming through scummer feeding forming machine, and after carrying out forced negative pressure dehydration shaping, obtain the half wet or light biosoluble fibres felt wet; Fibre concentration after slurry dilutes further is preferably below 2wt%, is beneficial to molding effect and stablizes; The moisture percentage of fibrofelt, preferably at below 75wt%, is beneficial to and reduces drying plant cost and energy-conservation; Scummer is generally centrifugal slagging-off, can remove the slag ball or impurity that may contain in fiber, to ensure quality of item;

Or, carry out upper net forming after being diluted further by slurry or through scummer feeding forming machine, and carry out forced negative pressure dehydration shaping, then send into glue system and carry out applying glue, obtain half wet or light wet biosoluble fibres felt; Fibre concentration after slurry dilutes further is preferably below 2wt%, is beneficial to molding effect and stablizes; The moisture percentage of fibrofelt, preferably at below 75wt%, is beneficial to and reduces drying plant cost and energy-conservation; Scummer is generally centrifugal slagging-off, can remove the slag ball or impurity that may contain in fiber, to ensure quality of item; Described forming machine is inclined-wire form machine or cylinder forming machine; Described glue system can carry out pouring glue, dipping solution, glue spraying liquid, spray (spilling) rubber powder method; Described glue system contains forced negative pressure evacuator, can carry out the adjustment of biosoluble fibres felt glue content, also makes glue can penetrate carpet veneer simultaneously, infiltrates each root fiber, is comparatively evenly distributed in fibrofelt;

Step 3, by half, wet or light wet biosoluble fibres felt is delivered in baking oven (road) and dries, and obtains biosoluble fibres felt.The temperature range of baking oven (road) is preferably 100 ~ 400 DEG C.

A kind of vacuum heat-insulating plate, is made up of core, barrier bag and getter; Core is placed in barrier bag, and getter is positioned over core inside, vacuumizes in barrier bag; Getter is one or more combination of drier or composite getter; It is characterized in that: core forms by multilayer felt is stacked; This felt is the fibrofelt containing biosoluble fibres; The wherein adhesive 0 ~ 15wt% of biosoluble fibres 85 ~ 100wt%, solidification; Biosoluble fibres with monofilament form phase IPN around overlap joint or interweave distribute and form the space be interconnected; Adhesive to be dispersed between monofilament and to bond closely with them, not individualism; Biosoluble fibres fiber diameter is≤30 μm, average fiber length is≤250mm; Biosoluble fibres refers to the constant of dissolution rate K in simulation Human Lung liquid _dis>=100ng/ (cm ².hr); Percetage by weight (the Na of inorfil (comprising mineral wool, rock wool, glass wool, glass fibre, refractory fibre, ceramic fibre etc.) each composition in biosoluble fibres ₂o+K ₂o+CaO+MgO+BaO) > 18wt% and/or [(Na ₂o+K ₂o+CaO+MgO+BaO+B ₂o ₃)-2* (Al ₂o ₃)] > 40wt%; Described adhesive is one or more the combination in liquid-type adhesive or powder-type adhesive; Barrier bag is the packaging bag of being made up of the two-sided composite of more than at least 2 layers Film laminateds; The film of described barrier bag can be one or more in (macromolecule membrane, plated film macromolecule membrane, aluminium foil).Vacuum values in barrier bag preferably at below 25Pa, the heat-insulating property of such vacuum heat-insulating plate by gas heat-transfer affect can drop to minimum.Described core can be obtained by following methods: above-mentioned dry-type centrifugal method or dry type combing method or wet type acid system or the standby dry felt of continuous print of wet type glue legal system are sent into guillotine and cuts into dry felt by required specification, again the number of plies of dry felt by regulation is stacked neatly, be organized into the required core for vacuum heat-insulating plate.

The present invention is used for the felt of vacuum heat-insulating plate, to fix the felt be prepared from by biosoluble fibres or containing adhesive, not only have and the good environmental protection performance such as harm is not formed to environment, organism, the insulation capacity of combining efficient again, and intensity is good, be applicable to carrying out industrial production in enormous quantities continuously, it is the outstanding heat-insulating material of combination property.

The present invention is used for the manufacture method of the felt of vacuum heat-insulating plate, first preparation method's (dry-type centrifugal method or dry type combing method or wet type acid system or wet type glue method) of biosoluble fibres (cotton) precursor fibrofelt is as described above carried out the breaing up of precursor, to discongest or containing slagging-off, complete precursor monofilament and make fiber phase IPN around overlap joint or interweave formed fibrofelt, also can according to intensity need in preparation process, add adhesive and make adhesive solidification between fiber, finally obtain or containing adhesive intensity be applicable to dry felt.So this method can obtain the fibre dust (comprising MMMF) that can effectively avoid or effectively reduce and produce in manufacture process, application process and Dismantlement process to the qualified felt needed for the VIP of human health damage.In the felt that this method is produced, biosoluble fibres and the adhesive that may add account for felt ratio and all meet preferred requirement, all fibres is the overwhelming majority exist with monofilament form, the non-individualism of the adhesive that may add but stick between fiber and on fiber, felt thickness is even, surfacing, felt intensity meets needed for self continuous seepage and VIP manufacture completely, felt temperature tolerance reaches needed for VIP manufacture and application equally, it is crucial that felt has also possessed environmental protection characteristic organism not being formed to harm while possessing thermal insulation, heat-insulating property.

Vacuum heat-insulating plate of the present invention adopts above-mentioned felt, can effectively avoid or effectively reduce the harm that the fibre dust (comprising MMMF) that produces in manufacture process, application process and Dismantlement process causes health.Compared to the vacuum heat-insulating plate adopting prior art felt, environmental protection effect obtains the lifting of essence and thermal conductivity factor is not affected even lower.

Accompanying drawing explanation

Fig. 1 is the structural representation of vacuum heat-insulating plate.

Fig. 1-1 be in Fig. 1 A-A to cross-sectional view.

Fig. 2 is biological soluble fibrolytic experimental provision schematic diagram.

Fig. 3 is the micro-structure diagram before biological soluble Fibrinolysis.

Fig. 4 is the micro-structure diagram after biosoluble fibres dissolves in Gamble solution.

Fig. 5 is the micro-structure diagram of the biosoluble fibres felt adopting dry-type centrifugal legal system standby.

Fig. 6 is the micro-structure diagram of the biosoluble fibres felt adopting wet type acid system to prepare.

Fig. 7 is the micro-structure diagram of the biosoluble fibres felt adopting wet type glue legal system standby.

Fig. 8 is the micro-structure diagram of the amplification 1500 times of the biosoluble fibres felt adopting biological soluble staple fiber to prepare.

Fig. 9 is the micro-structure diagram of the amplification 250 times of the biosoluble fibres felt adopting biological soluble staple fiber to prepare.

Detailed description of the invention

One, embodiment one

An embodiment of biosoluble fibres felt of the present invention, this felt is only made up of biosoluble fibres, and wherein: biosoluble fibres is biological soluble inorfil, [glass ingredient is: 58wt%SiO to be specially biological soluble glass wool ₂, 20wt%CaO, 18wt%MgO, 2.5wt%Na ₂o, 0.5wt%K ₂o, 0.8wt%ZrO ₂, 0.2wt%Al ₂o ₃deng impurity], fiber diameter 6 μm, average fiber length 30mm, slag ball content 0.5wt%, the constant of dissolution rate K in simulation Human Lung liquid _disfor 225ng/ (cm ².hr), meet the requirement that European Parliament and European Council No. 1272/2008 regulation (classification of material and mixture, label and Package Ordinances) explains Q, meet German RAL authentication requesting, (Na in fiber ₂o+K ₂o+CaO+MgO+BaO) content is 38wt%, and German KI is 41.

Adopt dry-type centrifugal legal system for this felt, its process is as follows:

Step one, [feed liquid configuration proportion is biological soluble melting feed liquid: 58wt%SiO ₂, 20wt%CaO, 18wt%MgO, 2.5wt%Na ₂o, 0.5wt%K ₂o, 0.8wt%ZrO ₂, 0.2wt%Al ₂o ₃deng impurity] after discharging opening outflow, enter the spinning head of 2500r/min High Rotation Speed, and be thrown out of into the low flow rate strand of 20 ~ 30 μm from the 2.5mm pore of spinning head, not yet fibroblast; The temperature of spinning head controls at 950 ~ 1000 DEG C;

Step 2, the feed liquid (low flow rate strand) thrown away vertically are jetted by the high-speed flame air-flow of pore periphery, and feed liquid is blow molded into thinner (thread) further; Flame flow speed 200m/s, flame temperature 1200 ~ 1500 DEG C;

Step 3, thinner feed liquid (thread) are cooled to obtain biosoluble fibres in the process flying to waft by further wind;

Step 4, biosoluble fibres by with the guipure of spinning head right opposite below negative pressure collect to obtain biosoluble fibres felt at the collection web band of 200 ~ 500Pa, then to fibrofelt heat (200 ~ 250 DEG C) pressurization (56Kg/cm ²) shaping obtains comparatively closely knit continuous print biosoluble fibres felt, its fiber fiber diameter 6 μm, average fiber length is 30mm, slag ball content 0.5wt%.The below of collection web band connects evacuator, three districts divided equally by evacuator, the top simultaneously collecting web band has blows cotton device and carries out high-pressure blast and regulate and dispel evenly to sudden fiber further, and the biosoluble fibres felt thickness of such gained is even, surface is more smooth.The density of this fibrofelt is 200 ~ 250Kg/m ³, thickness is 2 ~ 3mm, and density and thickness all measure under 100KPa pressure.

The biosoluble fibres felt of this health environment-friendly, material of main part biological soluble glass wool still belongs to MMMF class, but and unconventional biological indissoluble solution or biological undissolved glass wool or ore deposit (rock) cotton, its microstructure is as Fig. 5.Fig. 5 amplifies 200 times under an electron microscope, the true effect figure of the microcosmic obtained, can see microglass fiber with monofilament formal distribution exist, and phase IPN around overlap joint or interweave distribute and form the space be interconnected.

Adopt the present embodiment fibrofelt to prepare two kinds of VIP, contrast:

The first, do not put the VIP of getter.Dry for continuous print felt is sent into guillotine and cuts into dry felt by required specification (300mm × 300mm), then the number of plies (6 layer) of dry felt by regulation is stacked neatly, the core for VIP arranging required.Get this core (6 layers of dry felt of 300mm × 300mm × 2mm), under 105 DEG C of conditions, toast 30min.Toast complete, take out, be stacked after, loading after in the two-sided barrier bag be composited by five layer films such as nylon, polyethylene terephthalate (PET), aluminium foil, nylon, polyethylene (PE) sends in vacuum seal equipment, to find time the gas comprised in this equipment in barrier bag, vacuum to barrier bag outer (namely in vacuum seal equipment) reaches 0.045Pa, after barrier bag sealing, vacuum seal equipment vacuum breaker takes out barrier bag, and namely bound edge obtains VIP.In this VIP, vacuum is about 1Pa.

The second, has the VIP putting getter.Dry for continuous print felt is sent into guillotine and cuts into dry felt by required specification (300mm × 300mm), then the number of plies (6 layer) of dry felt by regulation is stacked neatly, the core for VIP arranging required.Get this core (6 layers of dry felt of 300mm × 300mm × 2mm) to open one in avris and can put the blind round hole of a getter size (Ф 30mm, thick 8mm) (as shown in Figure 1, the center of this blind hole 13 and the distance L at this core 12 edge are 35mm), under 105 DEG C of conditions, toast this core 30min.After toasting complete, take out, being stacked, the getter that is combined by lime powder and barium lithium alloy is positioned in the corresponding blind hole of this core.Being loaded by this core with getter after in the two-sided barrier bag be composited by five layer films such as nylon, polyethylene terephthalate, aluminium foil, nylon, polyethylene sends in vacuum seal equipment, to find time the gas comprised in this equipment in barrier bag, vacuum to barrier bag outer (namely in vacuum seal equipment) reaches 0.045Pa, after barrier bag sealing, vacuum seal equipment vacuum breaker takes out barrier bag, and namely bound edge obtains VIP.In this VIP, vacuum is about 1Pa.

The heat-insulating property of the above two kinds of VIP of test.Method of testing is: adopt domestic JW-III type heat-flow meter formula (stable state) conductometer to test, arrange its cold plate temperature 5 DEG C, hot plate temperature 35 DEG C, testing time 1h, obtains VIP thermal conductivity factor.Test result, the thermal conductivity factor 1.55mw/ (mk) of the first VIP; The thermal conductivity factor 1.50mw/ (mk) of the second VIP.

Adopt the VIP core that traditional glass cotton is made, make above-mentioned two kinds of contrast VIP according to above-mentioned specification and parameter, test the heat-insulating property of these two kinds contrast VIP with said method, the thermal conductivity factor 3.26mw/ (mk) of the first contrast VIP; The thermal conductivity factor 3.14mw/ (mk) of the second contrast VIP.Visible, the first contrast of the thermal conductivity ratio of the first VIP VIP can reduce 1.71mw/ (mk); Thermal conductivity ratio the second contrast VIP of the second VIP can reduce 1.64mw/ (mk).The raising of heat-insulating property is quite obvious.

Two, embodiment two

An embodiment of biosoluble fibres felt of the present invention, the adhesive that this felt is solidified by 85wt% biosoluble fibres and 15wt% forms, wherein: biosoluble fibres is biological soluble inorfil, be specially biological soluble glass wool, glass ingredient is: 79wt%SiO ₂, 12wt%CaO, 4wt%MgO, 2.5wt%Na ₂o, 0.5wt%K ₂o, 0.8wt%ZrO ₂, 0.2wt%Al ₂o ₃, other impurity of 1wt%, fiber diameter 3 μm, average fiber length 250mm, slag ball content 0.75wt%, the constant of dissolution rate K in simulation Human Lung liquid _disfor 155ng/ (cm ².hr), the requirement that European Parliament and European Council No. 1272/2008 regulation (classification of material and mixture, label and Package Ordinances) explains Q is met, (Na in fiber ₂o+K ₂o+CaO+MgO+BaO) content is 19wt%; Adhesive is pure-acrylic emulsion, trade mark S-05, solid content 50wt%.Manufactured by Nantong Sheng Da chemical company.

Step one, biological soluble melting feed liquid, feed liquid configuration proportion is: 79wt%SiO ₂, 12wt%CaO, 4wt%MgO, 2.5wt%Na ₂o, 0.5wt%K ₂o, 0.8wt%ZrO ₂, 0.2wt%Al ₂o ₃, other impurity of 1wt%, after flowing out, enters the spinning head of 2500r/min High Rotation Speed, and is thrown out of into the low flow rate strand of 20 ~ 30 μm from the 2.5mm pore of spinning head, not yet fibroblast from discharging opening; The temperature of spinning head controls at 950 ~ 1000 DEG C;

Step 4, biosoluble fibres by with the guipure of spinning head right opposite below negative pressure collect to obtain biosoluble fibres felt at the collection web band of 2000 ~ 5000Pa, in rear feeding sizing applicator, spray method is adopted to impose adhesive, and found time to regulate content to the 24 ~ 28wt% of adhesive on fibrofelt by negative pressure, then fibrofelt is pressurizeed (1 ~ 3Kg/cm ²) after sizing, enter 200 ~ 300 DEG C of baking oven (road) heating, dryings, solidifying and setting, finally heat (150 ~ 200 DEG C) pressurization (3 ~ 6Kg/cm2) more further, obtain comparatively closely knit continuous print biosoluble fibres felt, its fiber fiber diameter 3 μm, average fiber length is 250mm, slag ball content 0.75wt%, the adhesive content 5wt% of solidification.The below of collection web band connects evacuator, three districts divided equally by evacuator, the top simultaneously collecting web band has blows cotton device and carries out high-pressure blast and regulate and dispel evenly to sudden fiber further, and the biosoluble fibres felt thickness of such gained is even, surface is more smooth.The density of this fibrofelt is 180 ~ 230Kg/m ³, thickness is 2.5 ~ 3.5mm, and density and thickness all measure under 100KPa pressure.

The preparation of the present embodiment fibrofelt is adopted not put the VIP of getter.Dry for continuous print felt is sent into guillotine and cuts into dry felt by required specification (300mm × 300mm), then the number of plies (5 layer) of dry felt by regulation is stacked neatly, the core for VIP arranging required.Get this core (5 layers of dry felt of 300mm × 300mm × 2.5mm), after drying under 105 DEG C of conditions, loading after in the two-sided barrier bag be composited by five layer films such as nylon, polyethylene terephthalate, aluminium foil, nylon, polyethylene sends in vacuum seal equipment, to find time the gas comprised in this equipment in barrier bag, vacuum to barrier bag outer (namely in vacuum seal equipment) reaches 0.045Pa, after barrier bag sealing, vacuum seal equipment vacuum breaker takes out barrier bag, and namely bound edge obtains VIP.In this VIP, vacuum is about 1Pa.

Test the heat-insulating property of above VIP.Method of testing is with first embodiment.Test result, thermal conductivity factor 2.21mw/ (mk), can reduce 1.05mw/ (mk) than the first contrast VIP; The raising of heat-insulating property is quite obvious.

Three, embodiment three

An embodiment of biosoluble fibres felt of the present invention, this felt is only made up of biosoluble fibres, wherein: biosoluble fibres is biological soluble inorfil, be specially biological soluble rock wool [Rockwool (Luo Kewei) company, model RIF41001], fiber diameter 2 μm, average fiber length 50mm, slag ball content 1.5wt%, the constant of dissolution rate K in simulation Human Lung liquid _disfor 305ng/ (cm ².hr), meet the requirement that European Parliament and European Council No. 1272/2008 regulation (classification of material and mixture, label and Package Ordinances) explains Q, meet German RAL authentication requesting.

Adopt dry type combing method to prepare this felt, its process is as follows:

Step one, biological soluble rock wool dropped into bale opener carry out bale packing fiber opening, after go in the pre-opener and refined opener of being furnished with slag removing system and carry out the thick shredding of fiber and slagging-off; At this moment rock wool group obtains basic shredding, breaks up, and the larger slag ball in rock wool is also disallowable;

Step 2, the fibrofelt after thick shredding sent into the vibration cotton feeder further shredding mixing of being furnished with slag removing system and remove the gred and transfer out uniform carpet veneer, then the feeding double cylinder and double doffer carding machine of being furnished with slag removing system carries out more complete shredding, slagging-off and combing and must to distribute uniform lamelliform biosoluble fibres felt; Now, rock wool obtains good monofilament and discongests, and removes most of slag ball or impurity, fiber phase IPN around or overlap joint or interweave and distribute and form the space be interconnected, but fibrofelt is comparatively puffy, also softer, the thickness 3.5mm of felt;

Step 3, lamelliform fibrofelt gone to clamping lapping machine and carry out lapping, obtain the 6 biosoluble fibres felts folded layer by layer;

Step 4, the biosoluble fibres felt folded 6 layer by layer to be sent in 600 times/min middling speed needing machine under needing machine and middling speed by drawing machine and are carried out acupuncture sizing, and control needling density is 50 thorns/cm ², after enter two double roller calenders and carry out heating (220 DEG C) pressurization (10Kg/cm ²) sizing, obtain comparatively closely knit, thickness uniform continuous print biosoluble fibres felt.The density of this fibrofelt is 180 ~ 220Kg/m ³, thickness is 3 ~ 4mm, and density and thickness all measure under 100KPa pressure.

The biosoluble fibres felt of this health environment-friendly, material of main part biological soluble rock wool still belongs to MMMF class, but and unconventional biological indissoluble solution or biological undissolved glass wool or ore deposit (rock) cotton, obtain rock wool fibers with monofilament formal distribution exist, and phase IPN around overlap joint or interweave distribute and form the space be interconnected.

The preparation of the present embodiment fibrofelt is adopted not put the VIP of getter.Dry for continuous print felt is sent into guillotine and cuts into dry felt by required specification (300mm × 300mm), then the number of plies (3 layer) of dry felt by regulation is stacked neatly, the core for VIP arranging required.Get this core (3 layers of dry felt of 300mm × 300mm × 4mm), after drying under 105 DEG C of conditions, loading after in the two-sided barrier bag be composited by five layer films such as nylon, polyethylene terephthalate, aluminium foil, nylon, polyethylene sends in vacuum seal equipment, to find time the gas comprised in this equipment in barrier bag, vacuum to barrier bag outer (namely in vacuum seal equipment) reaches 0.045Pa, after barrier bag sealing, vacuum seal equipment vacuum breaker takes out barrier bag, and namely bound edge obtains VIP.In this VIP, vacuum is about 1Pa.

Test the heat-insulating property of above VIP.Method of testing is with first embodiment.Test result, thermal conductivity factor 1.91mw/ (mk), can reduce 1.35mw/ (mk) than the first contrast VIP; The raising of heat-insulating property is quite obvious.

Four, embodiment four

An embodiment of biosoluble fibres felt of the present invention, the adhesive that this felt is solidified by 90wt% biosoluble fibres and 10wt% forms, wherein: biosoluble fibres is biological soluble inorfil, be specially biological soluble rock wool [Rockwool (Luo Kewei) company, model RIF41001], fiber diameter 30 μm, average fiber length 75mm, slag ball content 10wt%; Adhesive is benzene emulsion, trade mark 7513B, solid content 40wt%, is manufactured by Changshu chemical company of Xinhua.

Adopt dry type combing method to prepare this felt, its process is as follows:

Step 2, the fibrofelt after thick shredding sent into the vibration cotton feeder further shredding mixing of being furnished with slag removing system and remove the gred and transfer out uniform carpet veneer, then the feeding double cylinder and double doffer carding machine of being furnished with slag removing system carries out more complete shredding, slagging-off and combing and must to distribute uniform lamelliform biosoluble fibres felt; Now, rock wool obtains good monofilament and discongests, and removes most of slag ball or impurity, fiber phase IPN around or overlap joint or interweave and distribute and form the space be interconnected, but fibrofelt is comparatively puffy, also softer, the thickness 2.5mm of felt;

Step 3, lamelliform fibrofelt gone to clamping lapping machine and carry out lapping, obtain the 2 biosoluble fibres felts folded layer by layer;

Step 4, the biosoluble fibres felt folded 2 are layer by layer sent in sizing applicator after being sent into by drawing machine, impregnation method is adopted to impose adhesive, and found time to regulate content to the 20 ~ 24wt% of adhesive on fibrofelt by negative pressure, then fibrofelt is pressurizeed (1 ~ 3Kg/cm ²) after sizing, enter 200 ~ 280 DEG C of baking oven (road) heating, dryings, solidifying and setting, finally heat (175 ~ 200 DEG C) pressurization (5 ~ 8Kg/cm2) more further, obtain comparatively closely knit continuous print biosoluble fibres felt, its fiber fiber diameter 30 μm, average fiber length is 75mm, slag ball content 1.25wt% (major part is removed in start and carding process), the adhesive content 10wt% of solidification.The below of collection web band connects evacuator, three districts divided equally by evacuator, the top simultaneously collecting web band has blows cotton device and carries out high-pressure blast and regulate and dispel evenly to sudden fiber further, and the biosoluble fibres felt thickness of such gained is even, surface is more smooth.The density of this fibrofelt is 170 ~ 210Kg/m ³, thickness is 1.5 ~ 2.5mm, and density and thickness all measure under 100KPa pressure.

The preparation of the present embodiment fibrofelt is adopted not put the VIP of getter.Dry for continuous print felt is sent into guillotine and cuts into dry felt by required specification (300mm × 300mm), then the number of plies (8 layer) of dry felt by regulation is stacked neatly, the core for VIP arranging required.Get this core (8 layers of dry felt of 300mm × 300mm × 1.5mm), after drying under 105 DEG C of conditions, loading after in the two-sided barrier bag be composited by five layer films such as nylon, polyethylene terephthalate, aluminium foil, nylon, polyethylene sends in vacuum seal equipment, to find time the gas comprised in this equipment in barrier bag, vacuum to barrier bag outer (namely in vacuum seal equipment) reaches 0.045Pa, after barrier bag sealing, vacuum seal equipment vacuum breaker takes out barrier bag, and namely bound edge obtains VIP.In this VIP, vacuum is about 1Pa.

Test the heat-insulating property of above VIP.Method of testing is with first embodiment.Test result, thermal conductivity factor 1.81mw/ (mk), can reduce 1.45mw/ (mk) than the first contrast VIP; The raising of heat-insulating property is quite obvious.

Five, embodiment five

An embodiment of biosoluble fibres felt of the present invention, this felt is only made up of biosoluble fibres, wherein: biosoluble fibres is biological soluble inorfil, [glass ingredient is: 58wt%SiO to be specially 50wt% biological soluble glass fibre [large Hua Yuntong glass company, specification 11tex] and 50wt% biological soluble glass wool ₂, 20wt%CaO, 18wt%MgO, 2.5wt%Na ₂o, 0.5wt%K ₂o, 0.8wt%ZrO ₂, 0.2wt%Al ₂o ₃deng impurity; Or Saint-GobainIsover (Saint-Gobain-Aesop Wei Er) company, model P]; Biological soluble glass fibre is staple fiber, its fiber diameter 5 μm, average fiber length 12mm; The fiber diameter of biological soluble glass wool 2 μm, average fiber length 10mm, slag ball content 1.5wt%, the constant of dissolution rate K in simulation Human Lung liquid _disbe 250 ~ 350ng/ (cm ².hr), (Na in fiber ₂o+K ₂o+CaO+MgO+BaO) content is 26 ~ 37wt%.

Adopt wet type acid system to prepare this felt, its process is as follows:

Step one, biological soluble glass fibre and biological soluble glass wool put in beater and in pH value 3 ~ 4 plain boiled water, carries out making beating 20min, obtain finely dispersed slurry; Plain boiled water contains sulfuric acid; Beating consistency is 5wt%;

Step 2, slurry is diluted further after carry out upper net forming through centrifugal pulp cleaner feeding inclined-wire form machine, and obtain biosoluble fibres felt after carrying out forced negative pressure dehydration shaping; Fibre concentration after slurry dilutes further is 0.8wt%; Moisture percentage 35 ~ the 45wt% of fibrofelt;

Step 3, half wet biosoluble fibres felt is delivered in 200 ~ 300 DEG C of baking ovens (road) and dries, obtain continuous print biosoluble fibres felt; Fibrofelt is dry felt, and moisture content is 0.7wt%.The density of this fibrofelt is 180 ~ 220Kg/m ³, thickness is 1 ~ 2mm, and density and thickness all measure under 100KPa pressure.

The biosoluble fibres felt of this health environment-friendly, material of main part biological soluble glass fibre and biological soluble glass wool still belong to MMMF class, but and unconventional biological indissoluble solution or biological undissolved glass wool or ore deposit (rock) cotton, its microstructure is as shown in Figure 6.Fig. 6 amplifies 500 times under an electron microscope, the true effect figure of the microcosmic obtained, can see fiber with monofilament formal distribution exist, and phase IPN around overlap joint or interweave distribute and form the space be interconnected.

The preparation of the present embodiment fibrofelt is adopted not put the VIP of getter.Dry for continuous print felt is sent into guillotine and cuts into dry felt by required specification (300mm × 300mm), then the number of plies (12 layer) of dry felt by regulation is stacked neatly, the core for VIP arranging required.Get this core (12 layers of dry felt of 300mm × 300mm × 1mm), after drying under 105 DEG C of conditions, loading after in the two-sided barrier bag be composited by five layer films such as nylon, polyethylene terephthalate (PET), aluminium foil, nylon, polyethylene (PE) sends in vacuum seal equipment, to find time the gas comprised in this equipment in barrier bag, vacuum to barrier bag outer (namely in vacuum seal equipment) reaches 0.045Pa, after barrier bag sealing, vacuum seal equipment vacuum breaker takes out barrier bag, and namely bound edge obtains VIP.In this VIP, vacuum is about 1Pa.

Test the heat-insulating property of above VIP.Method of testing is with first embodiment.Test result, thermal conductivity factor 1.98mw/ (mk), can improve 1.28mw/ (mk) than the first contrast VIP.The raising of heat-insulating property is quite obvious.

Six, embodiment six

An embodiment of biosoluble fibres felt of the present invention, the adhesive that this felt is solidified by 95wt% biosoluble fibres and 5wt% forms, wherein: 95wt% biosoluble fibres is biological soluble inorfil, be specially biological soluble glass fibre [large Hua Yuntong glass company, specification 22tex], fiber diameter 11 μm, average fiber length 15mm, size content 0.1wt%, the constant of dissolution rate K in simulation Human Lung liquid _disfor 275ng/ (cm ².hr), German KI is 43; Adhesive is: interworking solution (the 20wt% polyvinyl alcohol resin aqueous solution: benzene emulsion=1:1), wherein, and polyvinyl alcohol resin, the trade mark 0388; Benzene emulsion, trade mark 7513B, solid content 40wt%.

Adopt wet type glue legal system for this felt, its process is as follows:

Step one, biological soluble glass fibre are put in beater and are pulled an oar in plain boiled water, obtain finely dispersed slurry; The viscosity 25mpa.s of plain boiled water; Described plain boiled water contains 1wt% thickener, 1wt% dispersant, 0.2wt% defoamer, 0.2wt% preservative agent and 0.01wt% adhesive; Beating consistency is 5wt%;

Step 2, slurry is diluted further after carry out upper net forming through centrifugal pulp cleaner feeding inclined-wire form machine, and after carrying out forced negative pressure dehydration shaping, then send into glue system and carry out the applying glue of pourings glue, obtain half biosoluble fibres felt that is wet or that gently wet; Fibre concentration after slurry dilutes further is 1wt%; Moisture percentage 50 ~ the 55wt% of fibrofelt; Adhesive is: interworking solution (the 20wt% polyvinyl alcohol resin aqueous solution: benzene emulsion=1:1);

Step 3, half wet biosoluble fibres felt is delivered in 200 ~ 300 DEG C of baking ovens (road) and dries, obtain continuous print biosoluble fibres felt; Fibrofelt is dry felt, and moisture content is 0.7wt%, and adhesive content is 5wt%.The density of this fibrofelt is 250 ~ 300Kg/m ³, thickness is 0.5 ~ 1.5mm, and density and thickness all measure under 100KPa pressure.

The biosoluble fibres felt of this health environment-friendly, material of main part biological soluble rock wool still belongs to MMMF class, but and unconventional biological indissoluble solution or biological undissolved glass wool or ore deposit (rock) cotton, its microstructure is as shown in Figure 7.Fig. 7 amplifies 500 times under an electron microscope, the true effect figure of the microcosmic obtained, can see fiber with monofilament formal distribution exist, and phase IPN around overlap joint or interweave distribute and form the space be interconnected.

The preparation of the present embodiment fibrofelt is adopted not put the VIP of getter.Dry for continuous print felt is sent into guillotine and cuts into dry felt by required specification (300mm × 300mm), then the number of plies (24 layer) of dry felt by regulation is stacked neatly, the core for VIP arranging required.Get this core (24 layers of dry felt of 300mm × 300mm × 0.5mm), after drying under 105 DEG C of conditions, loading after in the two-sided barrier bag be composited by five layer films such as nylon, polyethylene terephthalate, aluminium foil, nylon, polyethylene sends in vacuum seal equipment, to find time the gas comprised in this equipment in barrier bag, vacuum to barrier bag outer (namely in vacuum seal equipment) reaches 0.045Pa, after barrier bag sealing, vacuum seal equipment vacuum breaker takes out barrier bag, and namely bound edge obtains VIP.In this VIP, vacuum is about 1Pa.

Test the heat-insulating property of above VIP.Method of testing is with first embodiment.Test result, thermal conductivity factor 1.67mw/ (mk); The first contrast of the thermal conductivity ratio of the first VIP VIP can reduce 1.59mw/ (mk).The raising of heat-insulating property is quite obvious.Seven, embodiment seven

An embodiment of biosoluble fibres felt of the present invention, the adhesive that this felt is solidified by 99wt% biosoluble fibres and 1wt% forms, wherein: 99wt% biosoluble fibres is 30wt% biological soluble organic fiber and 39wt% biological soluble inorfil and 30wt% biological soluble composite fibre; 30wt% biological soluble organic fiber is specially 15wt% biological soluble (cotton linter) regenerated celulose fibre [Hubei chemical fibre group company, specification 20tex] and 15wt% biological soluble PGA (PGA) fiber [Cyananid company of the U.S., trade name Dexon], for staple fiber, fiber diameter 15 μm, average fiber length 10mm; 39wt% biological soluble inorfil is specially 20wt% biological soluble refractory fibre [ThermalCeramics company of Britain, model Superwool607] and 19wt% biological soluble ceramic fibre [Foshan Yi Nai energy-saving material company, specification 1260], fiber diameter 3 μm, average fiber length 50mm, slag ball content 1.5wt%; 30wt% biological soluble composite fibre is specially 15wt% biological soluble inorganic (silica)-polymer (polypropylene) blended fiber [Chinese Academy of Sciences's chemistry institute, specification 20tex] and 15wt% biological soluble inorganic (glass fibre) outside cover polymer (epoxy resin) fiber [large Hua Yuntong glass company, specification 22tex], for staple fiber, fiber diameter 15 μm, average fiber length 30mm, the constant of dissolution rate K in simulation Human Lung liquid _disbe 200 ~ 400ng/ (cm ².hr); Adhesive is: the amphoteric amino-resin aqueous solution, trade mark 215M, solid content 10wt%.

Adopt wet type glue legal system for this felt, its process is as follows:

Step one, biological soluble glass fibre are put in beater and are pulled an oar in plain boiled water, obtain finely dispersed slurry; The viscosity 25mpa.s of plain boiled water; Described plain boiled water contains 1wt% thickener (methylcellulose), 1wt% dispersant (trade mark 5040), 0.2wt% defoamer (trade mark 3496); Beating consistency is 5wt%;

Step 2, slurry is diluted further after, then add the adhesive of 10wt% fibre weight, after mixing, carry out upper net forming through centrifugal pulp cleaner feeding cylinder forming machine, and carry out forced negative pressure dehydration shaping and obtain half wet biosoluble fibres felt; Fibre concentration after slurry dilutes further is 1wt%; Moisture percentage 50 ~ the 55wt% of fibrofelt; Adhesive is: the amphoteric amino-resin aqueous solution;

Step 3, half wet biosoluble fibres felt is delivered in 200 ~ 250 DEG C of baking ovens (road) and dries, obtain continuous print biosoluble fibres felt; Fibrofelt is dry felt, and moisture content is 0.2wt%, and the adhesive content of solidification is 1wt%.The density of this fibrofelt is 240 ~ 290Kg/m ³, thickness is 1 ~ 2mm, and density and thickness all measure under 100KPa pressure.

The biosoluble fibres felt of this health environment-friendly, and unconventional biological indissoluble solution or biological undissolved glass wool or ore deposit (rock) cotton, its microstructure is as shown in Figure 8, Figure 9.Fig. 8 amplifies 1500 times under an electron microscope, the true effect figure of the microcosmic obtained, biosoluble fibres 81,82 can be seen exist mainly with monofilament formal distribution greatly, and phase IPN around, overlap joint, interweave, adhesive 83 to be dispersed between biological soluble 81,82 monofilament with cured form and to bond closely with them, not individualism.Fig. 9 amplifies 250 times under an electron microscope, and the true effect figure of the slightly macroscopic view obtained, to see between biosoluble fibres 91,92 monofilament cross-cutting distribution in three dimensions and form fibrofelt, showing good practicality.

The preparation of the present embodiment fibrofelt is adopted not put the VIP of getter.Dry for continuous print felt is sent into guillotine and cuts into dry felt by required specification (300mm × 300mm), then the number of plies (12 layer) of dry felt by regulation is stacked neatly, the core for VIP arranging required.Get this core (12 layers of dry felt of 300mm × 300mm × 1mm), after drying under 105 DEG C of conditions, loading after in the two-sided barrier bag be composited by five layer films such as nylon, polyethylene terephthalate, aluminium foil, nylon, polyethylene sends in vacuum seal equipment, to find time the gas comprised in this equipment in barrier bag, vacuum to barrier bag outer (namely in vacuum seal equipment) reaches 0.045Pa, after barrier bag sealing, vacuum seal equipment vacuum breaker takes out barrier bag, and namely bound edge obtains VIP.In this VIP, vacuum is about 1Pa.

Test the method for testing of above VIP heat-insulating property with first embodiment.Test result, thermal conductivity factor 1.79mw/ (mk), can reduce 1.47mw/ (mk) than the first contrast VIP; The raising of heat-insulating property is quite obvious.

The above, be only present pre-ferred embodiments, do not limit scope of the invention process with this, and equivalence change and the modification done according to technical scheme of the present invention and description, all should belong to the scope that the present invention is contained.

Claims

1. a biosoluble fibres felt, this felt is the fibrofelt containing biosoluble fibres; The wherein adhesive 0 ~ 15wt% of biosoluble fibres 85 ~ 100wt%, solidification; Biosoluble fibres with monofilament form phase IPN around overlap joint or interweave distribute and form the space be interconnected; Biosoluble fibres fiber diameter is≤30 μm, average fiber length is≤250mm.

2. a kind of biosoluble fibres felt according to claim 1, is characterized in that: biosoluble fibres refers to the constant of dissolution rate K in simulation Human Lung liquid _dis>=100ng/ (cm ².hr); In biosoluble fibres, inorfil comprises mineral wool, rock wool, glass wool, glass fibre, refractory fibre, ceramic fibre, the percetage by weight (Na of each composition ₂o+K ₂o+CaO+MgO+BaO) > 18wt% and/or [(Na ₂o+K ₂o+CaO+MgO+BaO+B ₂o ₃)-2* (Al ₂o ₃)] > 40wt%.

3. a kind of biosoluble fibres felt according to claim 1, is characterized in that: described biosoluble fibres is one or more the combination in biological soluble organic fiber or biological soluble inorfil or biological soluble composite fibre.

4. a kind of biosoluble fibres felt according to claim 1, is characterized in that: described adhesive is one or more the combination in liquid-type adhesive or powder-type adhesive.

5. a preparation method for the biosoluble fibres felt described in Claims 1 to 4, is dry-type centrifugal method, it is characterized in that: comprise following steps:

One, after biological soluble melting or dense molten feed liquid flow out from discharging opening, enter the spinning head of High Rotation Speed, and be thrown out of from the pore of spinning head;

Two, the feed liquid thrown away vertically is jetted by the high velocity air of pore periphery, and feed liquid is blow molded into thinner further;

Three, thinner feed liquid cools to obtain biosoluble fibres in the process flying to waft; In cooling procedure or impose adhesive and/or sizing agent;

Four, biosoluble fibres is collected to obtain biosoluble fibres felt by the negative pressure collection web band with spinning head right opposite, again pressurization sizing or heating pressurization sizing carried out to fibrofelt and/or enter drying tunnel heating (oven dry) sizing, obtaining comparatively closely knit biosoluble fibres felt; Heating-up temperature is 100 ~ 500 DEG C, and moulding pressure is 1 ~ 50Kg/cm ²;

Or, biosoluble fibres is collected to obtain biosoluble fibres felt by the negative pressure collection web band with spinning head right opposite, rear feeding glue system, the methods such as sprinkling, pouring leaching and impregnation are adopted to impose adhesive, and found time to regulate the content of adhesive on fibrofelt by negative pressure, again pressurization sizing carried out to fibrofelt and/or enter drying tunnel heating (oven dry) sizing, finally carrying out pressurization sizing or heating pressurization sizing again, obtain comparatively closely knit biosoluble fibres felt; Heating-up temperature is 100 ~ 500 DEG C, and moulding pressure is 1 ~ 50Kg/cm ², drying tunnel temperature is 100 ~ 400 DEG C.

6. the preparation method of a kind of biosoluble fibres felt according to claim 5, it is characterized in that: the below collecting web band in step 4 connects evacuator, to make to form the negative pressure be evenly distributed above guipure, the biosoluble fibres felt thickness of gained is even, surface is more smooth.

7. a preparation method for the biosoluble fibres felt described in Claims 1 to 4, is dry type combing method, it is characterized in that: comprise following steps:

One, biosoluble fibres (cotton) input bale opener, shredding unit are carried out the thick shredding of fiber;

Two, can by cotton feeder uniform lamelliform biosoluble fibres felt of sending into that carding machine carries out more complete shredding, combing must distribute by the biosoluble fibres after shredding; Or carry out step 3 and step 4 again;

Three, lamelliform fibrofelt is gone to lapping machine and carry out lapping, obtain 2 layers and biosoluble fibres felt stacked above;

Four, 2 layers and biosoluble fibres felt stacked are above sent into acupuncture unit and carry out acupuncture sizing, or water thorn system carries out the sizing of water thorn, or hot pressing (rolling) unit carries out heating pressurization sizing, obtains comparatively closely knit biosoluble fibres felt; Water thorn system comprises spun-laced machine group, dewatering box and drying unit; Acupuncture or water thorn density are preferably 100 thorns/cm ²below; Or, 2 layers and biosoluble fibres felt stacked are above sent into glue system, the methods such as sprinkling, pouring leaching and impregnation are adopted to impose adhesive, and found time to regulate the content of adhesive on fibrofelt by negative pressure, again pressurization sizing carried out to fibrofelt and/or enter drying tunnel heating (oven dry) sizing, finally carry out pressurization sizing or heating pressurization sizing again, obtain comparatively closely knit biosoluble fibres felt; Heating-up temperature is 100 ~ 500 DEG C, and moulding pressure is 1 ~ 50Kg/cm ², drying tunnel temperature is 100 ~ 400 DEG C.

8. a preparation method for the biosoluble fibres felt described in Claims 1 to 4, is wet type acid system, it is characterized in that: comprise following steps:

One, biosoluble fibres (cotton) is put in beater pull an oar in plain boiled water, obtain finely dispersed slurry; The pH value of plain boiled water is 2 ~ 4;

Two, carry out upper net forming after being diluted further by slurry or through scummer feeding forming machine, and after carrying out forced negative pressure dehydration shaping, obtain half wet or light wet biosoluble fibres felt; Forming machine is inclined-wire form machine or cylinder forming machine;

Three, or light wet biosoluble fibres felt wet by half is delivered in baking oven (road) and dries, and obtains biosoluble fibres felt.

9. the preparation method of a kind of biosoluble fibres felt according to claim 8, is characterized in that: plain boiled water contains by sulfuric acid or hydrochloric acid.

10. a preparation method for the biosoluble fibres felt described in Claims 1 to 4, is wet type glue method, it is characterized in that: comprise following steps:

One, biosoluble fibres (cotton) is put in beater and is pulled an oar in plain boiled water, obtains finely dispersed slurry; Viscosity≤the 60mpa.s of plain boiled water;

Two, carry out upper net forming after being diluted further by slurry or through scummer feeding forming machine, and after carrying out forced negative pressure dehydration shaping, obtain half wet or light wet biosoluble fibres felt;

Or, after being diluted further by slurry, then add adhesive, after mixing or through scummer feeding forming machine, carry out upper net forming, and after carrying out forced negative pressure dehydration shaping, obtain half wet or light wet biosoluble fibres felt;

Or, after being mixed with adhesive by slurry, then after diluting further, or carry out upper net forming through scummer feeding forming machine, and after carrying out forced negative pressure dehydration shaping, obtain the half wet or light biosoluble fibres felt wet;

Or, carry out upper net forming after being diluted further by slurry or through scummer feeding forming machine, and carry out forced negative pressure dehydration shaping, then send into glue system and carry out applying glue, obtain half wet or light wet biosoluble fibres felt; Described forming machine is inclined-wire form machine or cylinder forming machine;

The preparation method of 11. a kind of biosoluble fibres felts according to claim 10, is characterized in that: described plain boiled water contain in thickener, dispersant, defoamer, preservative agent and adhesive one or more; Described glue system can carry out pouring glue, dipping solution, glue spraying liquid, spray (spilling) rubber powder method; Described glue system contains forced negative pressure evacuator, can carry out the adjustment of biosoluble fibres felt glue content.

12. 1 kinds of vacuum heat-insulating plates, are made up of core, barrier bag and getter; Core is placed in barrier bag, and getter is positioned over core inside, vacuumizes in barrier bag; Getter is one or more combination of drier or composite getter; It is characterized in that: core forms by multilayer felt is stacked; This felt is the fibrofelt containing biosoluble fibres; The wherein adhesive 0 ~ 15wt% of biosoluble fibres 85 ~ 100wt%, solidification; Biosoluble fibres with monofilament form phase IPN around overlap joint or interweave distribute and form the space be interconnected; Biosoluble fibres fiber diameter is≤30 μm, average fiber length is≤250mm; Barrier bag is the packaging bag of being made up of the two-sided composite of more than at least 2 layers Film laminateds; The film of described barrier bag is one or more in macromolecule membrane, plated film macromolecule membrane, aluminium foil.

13. a kind of vacuum heat-insulating plates according to claim 12, is characterized in that: biosoluble fibres refers to the constant of dissolution rate K in simulation Human Lung liquid _dis>=100ng/ (cm ².hr); In biosoluble fibres, inorfil comprises mineral wool, rock wool, glass wool, glass fibre, refractory fibre, ceramic fibre etc., the percetage by weight (Na of each composition ₂o+K ₂o+CaO+MgO+BaO) > 18wt% and/or [(Na ₂o+K ₂o+CaO+MgO+BaO+B ₂o ₃)-2* (Al ₂o ₃)] > 40wt%.

14. a kind of vacuum heat-insulating plates according to claim 12, is characterized in that: described biosoluble fibres is one or more the combination in biological soluble organic fiber or biological soluble inorfil or biological soluble composite fibre; Described adhesive is one or more the combination in liquid-type adhesive or powder-type adhesive.