CN104105917A - Vacuum insulation material and method for manufacturing same - Google Patents

Vacuum insulation material and method for manufacturing same Download PDF

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Publication number
CN104105917A
CN104105917A CN201380008960.6A CN201380008960A CN104105917A CN 104105917 A CN104105917 A CN 104105917A CN 201380008960 A CN201380008960 A CN 201380008960A CN 104105917 A CN104105917 A CN 104105917A
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inorganic fiber
inorganic
filaments
insulation material
fibers
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CN201380008960.6A
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Chinese (zh)
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CN104105917B (en
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井前宪司
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井前工业株式会社
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Priority to JP2012-029321 priority
Application filed by 井前工业株式会社 filed Critical 井前工业株式会社
Priority to PCT/JP2013/052992 priority patent/WO2013121992A1/en
Publication of CN104105917A publication Critical patent/CN104105917A/en
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    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209Inorganic fibres
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4391Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece characterised by the shape of the fibres
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/559Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving the fibres being within layered webs
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00Thermal insulation in general
    • F16L59/06Arrangements using an air layer or vacuum
    • F16L59/065Arrangements using an air layer or vacuum using vacuum

Abstract

Provided is a vacuum insulation material that has a stable quality, that is capable of maintaining initial thermal insulation properties over a long period of time, and that is capable of maintaining the form of a sheet even when the use of a binder, which causes the problem of volatilization in a vacuum state, is avoided. The vacuum insulation material according to the present invention includes a laminated body (10) of inorganic fiber sheets (1), and an enveloping member (11) that vacuum-seals the laminated body. In the inorganic fiber sheets, inorganic fiber strand groups that contain curved inorganic fiber strands having a cut length (L) of between 3mm and 12mm are randomly distributed, and at least some of the inorganic fiber strand groups are engaged with each other.

Description

真空绝热材料及其制造方法 The vacuum insulation material and method

技术领域 FIELD

[0001] 本发明涉及一种用于冰箱、冷藏库、保温箱、热水器等的真空绝热材料,更具体而言,涉及将通过湿式抄造法制造的无机纤维片材的层叠体用外包装材料真空密封而成的真空绝热材料及其制造方法。 [0001] The present invention relates to a refrigerator, refrigerator, incubator, water heaters and other vacuum insulation material, and more particularly, to a laminate of the inorganic fiber sheet produced by a wet sheet making method vacuo outer cover material a method for producing a vacuum insulation material and sealed with.

背景技术 Background technique

[0002] 作为用于冰箱、冷藏库、保温箱、热水器等的绝热材料,使用绝热性优异的真空绝热材料。 [0002] As the insulation material for a refrigerator, a refrigerator, an incubator, water heaters and the like, excellent in adiabatic vacuum insulation material. 作为真空绝热材料,以往使用如下形成的材料:加压压缩玻璃棉,同时将粘接制造的玻璃棉板收纳于阻气性优异的容器中,将容器内抽成真空而密封(例如,特开昭60-14695号公报:专利文献1)。 As the vacuum insulation material, conventionally used materials formed by: compressing glass wool, glass wool board while the adhesive is accommodated in the container for producing excellent gas barrier properties, the inner container is evacuated and sealed (e.g., Laid-Open Publication No. Sho 60-14695: Patent Document 1).

[0003] -般地,认为玻璃棉的纤维长度的偏差大,特别是用离心法、火焰法等制造的玻璃棉中含有称作硬粒(shot)(未纤维化粒状物)的微粒状的物质,粒径大的硬粒成为绝热材料中产生大的气孔的原因,此外,若绝热材料的空隙中存在多个硬粒,则由于在容器内气体的对流传热等,成为绝热性下降的原因。 [0003] - camel, fiber length variation that large glass wool, particularly those containing known as durum (SHOT) (unfiberized particulate matter) is made of glass wool particulate centrifugation, flame method and the like material, durum large particle size causes a large pores in the insulating material, in addition, if there is a plurality of voids durum insulating material, the insulating gas is lowered due to the convective heat transfer within the container and the like, become the reason. 此外,已知为提高绝热性,将无机纤维相对于热传导方向垂直地定向是有用的。 Furthermore, it is known to improve the insulating properties, the thermal conductivity of the inorganic fibers with respect to a direction perpendicular to the orientation useful.

[0004] 由此,例如,特开2005-265038号公报(专利文献2)提出了下述方案:替代加压压缩玻璃棉得到的玻璃棉板,使用将玻璃纤维进行了湿式抄造的无机纤维片材的层叠体,此夕卜,作为原料无机纤维,在玻璃棉中含有的硬粒的含有率设为〇. 1质量%以下。 [0004] Thus, for example, Laid-Open Publication No. 2005-265038 (Patent Document 2) proposed the following scheme: Alternatively compressing wool board glass wool obtained using the glass fiber inorganic fiber sheet is a wet papermaking laminate material, this evening Bu, inorganic fibers as a starting material, the content of durum contained in the glass wool billion to 1% by mass or less.

[0005] 但是,在玻璃棉中,含有的纤维长度的偏差大,还含有纤维长度比较长的纤维,这种纤维有时折弯、有时扭曲。 [0005] However, in the glass wool, fiber length variation comprising a large, further comprising a fiber length longer fibers, which are sometimes bent, sometimes distorted. 因此,使用玻璃棉作为原料时,即使用湿式抄造,也难以作成薄的无机纤维片材,而且绝热性能的提高受到限制,例如,专利4713566号公报(专利文献3)、专利4726970号公报(专利文献4)和专利4772887号公报(专利文献5)提出了将利用连续长丝(filament)法制造的无机纤维切割成特定长度得到的直线度高的无机纤维(短切丝)作为原料使用的方案。 Thus, when using glass wool as a raw material, i.e., a wet papermaking, it is difficult to made thin inorganic fiber sheet, but also improve the insulation performance is limited, for example, Patent No. 4713566 (Patent Document 3), Patent No. 4,726,970 (Patent Document 4) and Patent Publication No. 4772887 (Patent Document 5) proposes the use of continuous filaments (filament) manufactured by cutting the inorganic fiber method inorganic fibers having high specific length of the straight line obtained (chopped) as a raw material of the program .

[0006] 具体地,专利文献3-5提出了使用将平均纤维直径为3-15 μ m、平均纤维长度为3-15_、直线度高、圆形截面的无机纤维经湿式抄造的无纺布作为无机纤维片材的方案。 [0006] In particular, Patent Document 3-5 proposes the use of an average fiber diameter of 3-15 μ m, an average fiber length of 3-15_, straight and high, a circular cross section of the inorganic fibers of the nonwoven fabric by a wet papermaking as the inorganic fiber sheet program.

[0007] 现有技术文献: [0007] The prior art documents:

[0008] 专利文献 [0008] Patent Document

[0009] 专利文献1:特开昭60-14695号公报 [0009] Patent Document 1: Laid-Open Publication No. Sho 60-14695

[0010] 专利文献2:特开2005-265038号公报 [0010] Patent Document 2: Laid-Open Patent Publication No. 2005-265038

[0011] 专利文献3:专利4713566号公报 [0011] Patent Document 3: Patent Publication No. 4713566

[0012] 专利文献4:专利4726970号公报 [0012] Patent Document 4: Patent Publication No. 4726970

[0013] 专利文献5:专利4772887号公报 [0013] Patent Document 5: Patent Publication No. 4772887

发明内容 SUMMARY

[0014] 发明要解决的课题 [0014] invention Problems to be Solved

[0015] 专利文献3-5中由于作为原料使用的直线度高的短切丝在抄造步骤中难以产生纤维之间的的缠绕,因此粘合剂是必要的。 [0015] Patent Document 3-5 hardly occurs due to the entanglement of the fibers in the papermaking step as the raw material of chopped high straight, so the adhesive is necessary. 专利文献3-5使用聚乙烯醇纤维或聚乙烯醇粒子等水溶性聚合物作为粘合剂。 Patent Document 3-5 fibers a water-soluble polymer polyvinyl alcohol as a binder, or polyvinyl alcohol particles.

[0016] 但是,如上所述的有机粘合剂若在高真空度下长时间暴露,则会逐渐挥发,有机粘合剂的挥发成分引起真空度下降,成为真空绝热材料随时间而绝热性下降的原因。 [0016] However, if the organic binder as described above under prolonged exposure to high vacuum, will gradually evaporate volatile components of the organic binder decreased due to the degree of vacuum, a vacuum heat-insulating insulation material decreased with time s reason.

[0017] 专利文献3通过在芯材料真空密封前除去层叠的无纺布中含有的粘合剂,专利文献5通过使用液体粘合剂作为粘合剂(专利文献5),来抑制粘合剂引起的绝热性的下降。 [0017] Patent Document 3 by an adhesive core material is removed prior to vacuum sealing the stacked nonwoven fabric contained in, Patent Document 5 by using a liquid adhesive as a binder (Patent Document 5), to suppress the adhesive adiabatic drop caused.

[0018] 但是,专利文献3-5中,在真空度高的状态下使用无机纤维的情况下,由于与抑制纤维之间的缠绕有关,因此若粘合剂过少,则难以保持无机纤维片材的薄片形状。 [0018] However, Patent Documents 3-5, in the case of inorganic fibers in a high vacuum state, related to the inhibition entangled fibers, so if the adhesive is too small, it is difficult to hold the inorganic fibrous sheet shaped sheet material. 此外,即使追加通过加热等除去粘合剂的步骤,在无机纤维片材重叠的情况下,也难以除去内部的无机纤维片材的粘合剂,此外还引起追加粘合剂除去步骤导致的真空绝热材料的成本增高的新问题。 Further, even if the binder removal step is added, in the case where the inorganic fiber sheet overlap, it is difficult to remove the adhesive inside the inorganic fiber sheet by heating or the like, in addition to causing the binder removal step results in vacuo added to the new issue of the cost of insulation materials increased.

[0019] 本发明是鉴于上述情况而作出的,其目的在于提供一种质量稳定性高的真空绝热材料,其即使避免使用真空下会产生挥发问题之类的粘合剂,也能够保持薄片形状,并能够长期保持初期的绝热性。 [0019] The present invention is made in view of the above circumstances, and its object is to provide a high-quality vacuum insulation material stability, which occur even avoid the use of adhesive or the like volatilization under vacuum, the sheet shape can be maintained and the ability to maintain long-term thermal insulation initial.

[0020] 解决课题的方法 [0020] Solution to Problem

[0021] 本发明的真空绝热材料包括无机纤维片材的层叠体和真空密封该层叠体形成的外包装材料,其中,在所述无机纤维片材中,包含切割长度(L)为3-12_的曲线状无机纤维丝线的无机纤维丝束随机分散,并且所述无机纤维丝束的至少一部分彼此接合。 [0021] The vacuum insulation material of the present invention comprises a laminate of the inorganic fiber sheet and a vacuum sealing material of the outer laminate is formed, wherein, in the inorganic fiber sheet, comprising a cut length (L) of 3-12 _ curve-shaped inorganic fiber tow filaments randomly dispersed inorganic fibers, the inorganic fiber strands and at least a portion engaged with each other.

[0022] 所述曲线状无机纤维丝线优选将形成由曲线构成的波形的丝线以形成所述波形的1/2-1周期的方式以3mm-12mm的间隔切割而成,所述曲线状无机纤维丝线的峰部高度(振幅的2倍值)优选为l-6mm。 [0022] The inorganic fiber filaments is preferably curved to form filaments constituted by a curve wave manner to form 1 / 2-1 cycle of the waveform at intervals of 3mm-12mm cut from the curved shape of the inorganic fiber the peak height of the thread portion (2 times the value of the amplitude) is preferably l-6mm.

[0023] 所述无机纤维丝束是将膨松纱以3mm-12mm长度切割而得到,所述膨松纱含有复丝(multifilament)的芯线和在该芯线的表面上形成起圈和/或松弛并缠结的复丝的鞘线, 所述曲线状无机纤维丝线优选通过切割构成所述鞘线的复丝而得到,所述曲线状无机纤维丝线优选为具有6mm-25mm长度的起圈或曲线(curve)的丝线。 [0023] The inorganic fiber tow is bulky yarns 3mm-12mm length obtained by cutting the multifilament textured yarn comprising (multifilament) and a core wire and a looped formed on a surface of the core wire / or loose and entangled multifilament sheath wire, the curved shape of the inorganic fibers is preferably obtained by cutting the wires constituting the sheath multifilamentary wire, the wire inorganic fibers preferably having a looped curved shape 6mm-25mm length or wire curve (curve) of. 此外,构成所述芯线的复丝优选为截面异形纤维。 Further, the core wire constituting the multifilament fiber preferably profiled cross-section.

[0024] 所述无机纤维丝线的纤维直径优选为0. 5-15 μ m,所述无机纤维丝线优选为玻璃纤维。 [0024] The fiber diameter of the inorganic fiber filaments is preferably 0. 5-15 μ m, preferably the inorganic fiber filaments are glass fibers. 此外,所述曲线状丝线的含有率优选为所述无机纤维丝线整体的15%以上。 Further, the content of the curved shape of the wires is preferably 15% or more of the inorganic fibers integrally wires.

[0025] 所述无机纤维片材优选通过将所述无机纤维丝线的分散液湿式抄造得到。 The [0025] inorganic fiber sheet is preferably wet by the dispersion of the inorganic fibers obtained papermaking wire.

[0026] 本发明的真空绝热材料的制造方法,是含有无机纤维片材的层叠体和真空密封该层叠体形成的外包装材料的真空绝热材料的制造方法,其特征在于:包括原料液调制步骤, 搅拌含有无机纤维丝束和分散剂的纤维悬浊液而调制纤维分散液;和造纸步骤,将得到的所述纤维分散液进行湿式抄造而制作无机纤维片材, [0026] A method for producing a vacuum insulation material of the present invention is a method for producing a vacuum insulation material of the outer packaging material laminate and a vacuum sealing the laminate comprising inorganic fiber sheet is formed, wherein: the modulation step comprises the raw material liquid stirred suspension containing inorganic fibers and fiber tows a dispersant to prepare a dispersion fiber; and a step of papermaking, the fiber dispersion was subjected to wet papermaking process to prepare the inorganic fiber sheet,

[0027] 所述无机纤维丝束使用将膨松纱以3mm-12mm长度切割形成的无机纤维丝线,所述膨松纱含有复丝的芯线和在该芯线的表面上形成起圈和/或松弛并缠结的复丝的鞘线, 或使用由曲线构成的波形的1/2-1周期波长且波长为3mm-12mm的无机纤维丝线。 [0027] The inorganic fiber tow filaments using inorganic fibers bulky yarns formed by cutting 3mm-12mm length, said bulky multifilament yarn comprising a core wire and formed on the surface of the core wire and the looped / slack or entangled multifilament and a sheath wire, or 1 / 2-1 periodic waveform formed by a curve and the wavelength of a wavelength of 3mm-12mm inorganic fiber filaments.

[0028] 发明的效果 Effect [0028] invention.

[0029] 本发明的真空绝热材料因为实质上不含会使真空度下降的挥发成分,所以能够长时间保持高度的真空状态,而且还能够稳定地提供优异的绝热性。 [0029] The vacuum insulation material of the present invention, since the vacuum reduction will substantially free of volatile components, it is possible to maintain a high vacuum state for a long time, but also can provide excellent thermal insulation properties stably. 此外,作为本发明的真空绝热材料的制造方法,本发明的制造方法便利,生产率优异。 Further, as a method for producing a vacuum insulation material of the present invention, a manufacturing method of the present invention convenient, excellent productivity.

附图说明 BRIEF DESCRIPTION

[0030] 图1是用于说明本发明的真空绝热材料的构成的示意图。 [0030] FIG. 1 is a schematic configuration of the vacuum insulation material of the present invention.

[0031] 图2是用于说明波形赋形线的制造例的示意图。 [0031] FIG. 2 is a schematic example of a waveform shaping manufacturing line will be described.

[0032] 图3是用于说明波形赋形线的制造例的示意图。 [0032] FIG. 3 is a schematic example of a waveform shaping manufacturing line will be described.

[0033] 图4是用于说明齿轮的齿距的图。 [0033] FIG. 4 is a view for explaining the gear pitch FIG.

[0034] 图5是用于说明来自波形赋形线的无机纤维丝线的结构的图。 [0034] FIG. 5 is a diagram showing a configuration of wires of the inorganic fibers from the waveform shaping line for FIG.

[0035] 图6是用于说明来自波形赋形线的无机纤维丝线的图。 [0035] FIG. 6 is a diagram of an inorganic fiber filaments from the waveform shaping line for FIG.

[0036] 图7是用于说明膨松纱的构成的示意图。 [0036] FIG. 7 is a diagram showing a configuration for explaining a bulky yarn.

[0037] 图8是用于说明来自膨松纱的丝线的构成的示意图。 [0037] FIG. 8 is a schematic diagram of the configuration of the wires from the bulky yarn for explaining.

[0038] 图9是用于说明曲线状丝线接合的示意图。 [0038] FIG. 9 is a schematic view of the curved threads for engaging FIG.

[0039] 图10是用于说明来自膨松纱的无机纤维丝束的接合的示意图。 [0039] FIG. 10 is a schematic diagram of an inorganic fiber tow engaging from bulky yarns for explaining.

[0040] 图11是用于说明使用含有无机粘合剂情况下的丝线束的无机纤维片材的示意图。 [0040] FIG. 11 is a schematic diagram for explaining an inorganic fiber sheet bundle of wires in a case where an inorganic binder containing.

具体实施方式 Detailed ways

[0041] 如图1所示,本发明的真空绝热材料是含有无机纤维片材1,1…层叠形成的层叠体10和真空密封该层叠体10形成的外包装材料11的真空绝热材料。 [0041] As shown in FIG. 1, vacuum insulation material of the present invention contains an inorganic fiber sheet laminated body formation of 1,1 ... 10 and vacuum sealing the vacuum insulation material 10 formed of outer cover material 11 laminate.

[0042] 并且,在所述无机纤维片材1中,含有切割长度(L)3-12mm的曲线状无机纤维丝线的无机纤维丝束在随机分散,并且所述无机纤维丝束的至少一部分彼此接合而形成薄片状。 [0042] Further, in the inorganic fiber sheet 1, comprising a cutting length (L) of the inorganic fiber tows 3-12mm curved inorganic fibers randomly dispersed in the filaments and the tow of inorganic fibers at least part of another joined to form a sheet.

[0043] 所述曲线状无机纤维丝线可以通过以特定长度切割波形曲线(二维曲线)的长丝得到,还可以通过以特定长度切割螺旋样的三维曲线的长丝得到,还可以通过以特定长度切割随机地具有起圈或曲线的曲线状丝线得到。 [0043] The curve-shaped inorganic fiber filaments can be obtained by cutting the wires a waveform curve (two-dimensional curve) of a specific length by the filaments may be cut to a specific length of the spiral-like three-dimensional curve is obtained, may also be specific by having a random length of the cutting looped curves or curved wires obtained. 代表性的可列举:将被赋形为由曲线构成的波形的长丝(波形赋形线)以形成所述波形的1/2-1周期的方式以3mm-12mm的间隔切割的丝线(来自波形赋形线的丝线),和将含有复丝的芯线和在该芯线的表面上形成起圈和/ 或松弛并缠结的复丝的鞘线的膨松纱以长度3-12mm切割的丝线(来自膨松纱的丝线)。 Representative include: mode would be shaped by 1 / 2-1 cycle filaments constituting the waveform curve (waveform shaping wire) to form said waveform at intervals of 3mm-12mm cut wires (from waveform shaping wire line), and the core wire comprising multifilament and the looped forming wires on the surface of the core and / or sheath wire slack and bulky multifilament entangled yarns cut length 3-12mm filaments (bulky yarns from filaments). [0044] 构成薄片的无机纤维丝束中,所述曲线状丝线可仅仅以薄片形成所必要的量被含有。 [0044] The inorganic fibers constituting the sheet bundle, the filaments can be simply curved to form a sheet containing the necessary amount. 曲线状丝线的含有率根据曲线状丝线的种类(尺寸、形状等)为无机纤维丝线整体的15%以上,优选为50%以上,更优选为70%以上,进一步优选为全部是曲线状丝线。 Curved filaments containing rate based on the type of curved wires (size, shape, etc.) of at least 15% of the inorganic fibers integrally wires, preferably less than 50%, more preferably 70% or more, more preferably all curved wire.

[0045] 构成丝线的无机纤维可用玻璃纤维、玄武岩纤维、二氧化硅纤维、氧化铝纤维等陶瓷纤维等,优选玻璃纤维。 [0045] The inorganic fibers may be glass fiber filaments, basalt fibers, silica fibers, alumina ceramic fibers and other fibers, preferably glass fibers. 也可组合使用多种类型的无机纤维。 It may also be used in combination of a plurality of types of inorganic fibers. 此外,在同种类的无机纤维的情况下,例如玻璃纤维中,可组合组成不同的多种类型的玻璃纤维。 Further, in a case where the same kind of inorganic fibers such as glass fibers, may be a combination of a plurality of types of different compositions of glass fibers.

[0046] 无机纤维丝线的平均纤维直径优选为0. 5-15 μ m。 [0046] The inorganic fiber filaments having an average fiber diameter is preferably 0. 5-15 μ m. 若超过15 μ m,则无机纤维的刚性高,容易促进无机纤维片材间的热传导。 If more than 15 μ m, the rigidity of the inorganic fibers is high, easier to promote thermal conduction between the inorganic fiber sheet. 另一方面,若不到〇. 5 μ m,则刚性过低,存在难以通过纤维的接合发挥固定器作用的倾向。 On the other hand, if the square. 5 μ m, the rigidity is too low, tends to be difficult to play a role in the fixture by bonding the fibers. 为0. 5-3 μ m时虽然绝热性稍微劣化,但趁着低刚性向弯曲部位等的安装变容易,为3-15 μ m时能够进一步提高绝热性能。 Is 0. 5-3 μ m although the heat insulating property deteriorates slightly, but taking advantage of the low-rigidity mounting the bent portion or the like becomes easy, the heat insulating performance can be further improved when 3-15 μ m.

[0047] 此外,含有多种类型的无机纤维丝线的情况下,优选各自在上述范围内。 In the case [0047] In addition, inorganic fibers containing a plurality of types of filaments, preferably within the foregoing ranges.

[0048] 以下就代表性的无机纤维丝线(来自波形赋形线的丝线及来自膨松纱的丝线)进行说明。 [0048] Here will be described a representative inorganic fibers filaments (threads and filaments from the waveform shaping line from bulky yarns).

[0049] <来自波形赋形线的无机纤维丝束> [0049] <Inorganic fiber tow from the waveform shaping line>

[0050] (1)波形赋形线及其制造方法 [0050] (1) a waveform shaping wire and manufacturing method thereof

[0051] 波形赋形线是在直线状的长丝上形成曲线构成的波形的丝线。 [0051] The waveform shaping wire line is composed of a waveform curve is formed on the linear filaments.

[0052] 这里曲线构成的波形是指不包括直线构成的矩形波、三角波等。 [0052] waveforms herein means that no curve configuration includes a rectangular wave, triangular wave rectilinear. 此外,所谓以二维曲线(平面状曲线)形成的波形,是指不包括通过螺旋的1/2-1旋转部分得到的这类三维的曲线。 In addition, a so-called two-dimensional waveform curve (curve planar) form, does not include such means is a three-dimensional profile obtained by the 1 / 2-1 of the rotating portion of the spiral. 波形的形状没有特别限定,不限定于正弦波,采用通过将sin、cos、渐开线曲线等进行各种组合描绘的波形的全部为对象。 Shape of the waveform is not particularly limited, but is not limited to a sine wave, using various combinations depicted by waveform sin, cos, involute curve, etc. are all objects.

[0053] 构成波形赋形线的长丝优选使用复丝。 [0053] The waveform shaping lines constituting filaments is preferably multifilament. 玻璃纤维的复丝是使从熔融炉流出的纤维熔融液通过开设有形成复丝的多个孔的喷嘴而得到。 Multifilament glass fiber is formed with a plurality of nozzle holes multifilament fibers melt from the melting furnace flows through the opening obtained.

[0054] 在直线状长丝上形成波形的方法没有特别限定,在无机纤维是玻璃纤维的情况下,可通过使长纤维的长丝通过2个齿轮之间进行。 [0054] The method of forming wave-like filaments on a straight line is not particularly limited, but in the case where the inorganic fibers are glass fibers, may be passed between two gears by a long fiber filament. 具体地,可列举:如图2所示,加热直线状长丝2使其通过齿轮3、3之间的方法;如图3所示,将从喷嘴4进行熔融纺丝的直线状长丝2'在冷却固化前通过齿轮3'、3'之间,之后冷却的方法;加热长纤维的长丝,使其通过齿轮间的方法等。 Specific examples thereof include: heating the filament 2 so that the linear method between the gears 3 and 3 shown in FIG. 2; 3, 4 from the nozzle melt spinning a linear filament 2 'before the cooled and solidified by the gear 3', between the 3 ', after cooling method; long fiber filaments are heated, so that by means of the gears and the like. 任何一种方法均可通过使直线状长丝2、2'在加热至玻璃纤维的熔融温度附近的状态下通过齿轮之间,而形成具有波形的长丝(波形赋形线)5。 Any method can be linear filaments by 2, 2 'are formed filaments (waveform shaping wire) 5 having a waveform is heated to the vicinity of the glass fibers by a melting temperature between gears.

[0055] 波形赋形中使用的齿轮的形状没有特别限定,目的为得到曲线状无机纤维丝线即可。 [0055] The waveform shaping gear shape are not particularly limited, but for the purpose to obtain an inorganic fiber filaments can be curved. 不仅是通过调节齿轮的形状,通过调节图2、图3中2个齿轮间(3-3间、3' -3'间)的距离或长丝的送出速度等,也能够改变波形曲线的振幅、波形。 Not only by adjusting the shape of a gear, by adjusting the FIG. 2, FIG. 3 between the two gears (3-3 rooms, 3 '-3' internucleotide) feeding distance or speed of filaments and the like, it is possible to change the amplitude of the waveform curve waveform.

[0056] 作为使用的齿轮,例如在如图4所示的齿轮中,优先采用1-3模、齿距3-12_。 [0056] for use as a gear, for example, the gear shown in Figure 4, the precedence mode 1-3, 3-12_ pitch. 通过此方式,可形成波长1/2-1周期部分的波长为3-12mm的波形的形状。 In this manner, the wavelength can be formed in 1/2-cycle waveform shape portion of the wavelength of 3-12mm.

[0057] (2)曲线状无机纤维丝线 [0057] (2) curved inorganic fiber filaments

[0058] 曲线状的无机纤维丝线为以3mm-12mm的间隔、优选4-9mm的间隔,优选以形成所述波形的1/2-1周期的方式,切割如上的波形赋形线而得到。 [0058] The curved shape of the wires inorganic fibers at intervals of 3mm-12mm, preferably 4-9mm interval, to form an embodiment preferably 1 / 2-1 of the waveform cycle, the cutting line as a waveform shaping obtained.

[0059] 例如,在图5中示出的箭头A、B的位置切割的情况下,图5中AA之间(1/2周期)、 BB之间(1周期)为切割长度L,相当于该曲线状无机纤维丝线的波长。 [0059] For example, in FIG. 5 shows a case where the position of the arrows A, B cut, between AA in FIG. 5 (1/2 cycle), between BB (1 cycle) of the cut length L, equivalent to the wavelength of the curve-shaped inorganic fiber filaments.

[0060] 此外,切割位置不限定于波形的峰部、谷部的峰位置,可以以峰部、谷部的任意的位置为起点,以每1/2-1周期波长进行切割。 [0060] Further, the cutting position is not limited to the peak, the peak position of the waveform of the valley portion, may be any peaks, valleys starting position, each cut to 1 / 2-1 wavelength period. 如图6所示,在波长为1/2周期的情况下,可以是从波形的谷部的峰到峰部的峰的波形(参照图6(a)),也可以只是波形的谷部或峰部的波形(参照图6 (b))。 6 or valleys, in a case where a wavelength of 1/2 cycle, may be from the peak to the valley portion of the waveform of the peak of the waveform of the peak portion (see FIG. 6 (A)), may be only the waveform waveform (see FIG. 6 (b)) of the peak portion. 此外,在波长为1周期的情况时,可以是含有峰部和谷部的波形(参照图6(c)),也可以是在谷部或峰部的两腋处谷部或峰部的半峰高的波连接形成的波形(参照图6(d))。 Further, when the wavelength is 1 cycle, it may contain peaks and a waveform (see FIG. 6 (c)) valley portion may be a semi-valley portions of both sides or at the peak portion of the valley portion or peak portion of the waveform (see FIG. 6 (d)) connected to the peak height of waves formed. 此外,在图6中,实线表示的波形是丝线部分,虚线是用于描绘波形的参考部分。 Further, in FIG. 6, the solid line represents the waveform of a wire part, a broken line is used to depict a reference portion of the waveform.

[0061] 虽然可为任意的情况(波形),但绝大多数是波形的曲线状丝线,其波长在1/2-1 周期且为3mm_12謹。 [0061] Although a case may be any (waveform), but the vast majority is curved wire wave, the wavelength at which 1 / 2-1 and for the period 3mm_12 wish.

[0062] 若切割长度(波长)L过短,则难以通过抄造制作无机纤维片材。 [0062] When the cut length (wavelength) L is too short, it is difficult to produce inorganic papermaking fiber sheet through. 另一方面,若切割长度(波长)L变长,则存在由于无机纤维丝线过长,弹性下降,难以保持曲线状的倾向, 所以不优选。 On the other hand, when the length (wavelength) L becomes longer cut, there is too long since the inorganic fiber filaments, decreased flexibility, tends to be difficult to maintain the curved, it is not preferable.

[0063] 曲线状无机纤维丝线的峰部高度Η依赖于选择连续的波形的1/2-1周期的位置, 为1倍振幅到2倍振幅的范围的大小。 [0063] The curved peak portion of the inorganic fiber filaments highly dependent on the selection position Η 1 / 2-1 continuous waveform cycle, times the size of 1 to 2 times the amplitude of the amplitude range. 本发明使用的曲线状无机纤维丝线优选具有振幅为0. 5-3mm的波形,更优选0. 5-2mm。 The present invention uses a curve-shaped inorganic fiber filaments preferably have an amplitude waveform 0. 5-3mm, more preferably 0. 5-2mm. 因此,由于曲线状无机纤维丝线的峰部高度Η具有波形的1/2-1周期部分的波长,所以根据波形的相应位置,优选l-6mm的范围,更优选l-4mm。 Accordingly, since the peak portion of the curved-shaped inorganic fiber filaments having a wavelength height Η 1 / 2-1 portion of the waveform cycle, so that depending on the respective position of the waveform, preferably in the range of l-6mm, more preferably l-4mm.

[0064] 通常将10-100根波形赋形线扎起来,利用闸刀式剪切机等通过切断成特定的长度进行波形赋形线的切割。 [0064] The root is typically 10-100 waveform shaping line tied up using a guillotine cutter and the like by cutting into a predetermined length is cut waveform shaping line.

[0065] 通过以特定间隔切割复丝的波形赋形线得到的通常是多根无机纤维丝线形成束的丝束。 [0065] By cutting the multifilament at specific intervals waveform shaping line is usually obtained a plurality of inorganic fiber bundles formed of a tow wire. 由于这种丝束是可以1根1根独立分散的状态的丝束,所以在提供给无机纤维片材的制造之前或在无机纤维片材的制造的适当步骤中,优选以能够分离成单个无机纤维丝线的方式进行解离而使用。 Since such a tow is a tow of independently dispersed state, before it is provided to manufacture an inorganic fiber sheet or in a suitable step of manufacturing an inorganic fiber sheet is preferably inorganic so as to be separated into individual fiber filaments manner dissociation used.

[0066] 此外,无机纤维片材的材料在使用来自波形赋形线的曲线状丝线的情况下,不限于波形、波长、峰部高度全部相等的1种曲线状丝线的集合体。 In the case [0066] Further, the inorganic fiber sheet material, in use, the curved wire line from the waveform shaping is not limited to the waveform, wavelength, equal to the height of all peaks one kind of curved wire assembly. 也可使用通过改变波形赋形线的种类、切割位置,将具有不同的波形、波长、峰部高度的多种类型的曲线状丝线组合而成的无机纤维丝束。 It may also be used by changing the kind of the waveform shaping line, the cutting position, an inorganic fiber tow having different waveforms, the wavelength, the peak height of the plurality of types of combination of curved wires.

[0067] <来自膨松纱的无机纤维丝束> [0067] <Inorganic fiber tows from bulky yarns>

[0068] 因为来自膨松纱的无机纤维丝束是将含有复丝的芯线和在该芯线的表面上缠结的复丝的鞘线的膨松纱切割而得到,所以通常为直线状的丝线和曲线状的丝线组合的集合体。 [0068] Since inorganic fiber tow from the textured yarn is a multifilament textured yarn comprising a core wire and a sheath wire entanglement in the surface of the core wire of the multifilament obtained by cutting, so generally linearly combined wire filaments and aggregates curved.

[0069] 这里,直线状的丝线除了完全的直线丝线,还指具有与曲线状丝线可区别程度高的平直性的丝线。 [0069] Here, in addition to the straight wires completely straight wire, but also to wires having a high straightness with the curved wire distinguishable degree.

[0070] (1)膨松纱及其制造方法 [0070] (1) A method of manufacturing textured yarn

[0071] 对于膨松纱,例如,如图7所示,采用复丝线为芯线6,复丝的鞘线7在该芯线6的周围形成起圈或松弛,并且缠结。 [0071] For the textured yarn, e.g., as shown in Figure 7, a core wire using multifilament threads 6, 7 multifilament sheath line or looped slack formed around the core wire 6 and entangled. 此外,也可是构成芯线的复丝和构成鞘线的复丝形成起圈或松弛,并且缠结(未进行图示)。 In addition, but also multifilament core wire and a sheath wire multifilament formed looped or relaxed, and entanglement (not illustrated).

[0072] 作为这样的膨松纱,例如,已知使用在复丝线条上实施了流体乱流处理的被称作所谓的TASLAN变形纱或膨体纱的膨松纱,用双包覆纱机等,在芯线上将装饰用线包覆旋转所制造的花式纱等。 [0072] Examples of such a textured yarn, for example, it is known to use in the embodiment of the fluid lines of the multifilament turbulence of the process is referred to as a so-called TASLAN textured yarn or bulked yarn of textured yarn, by double covering machine etc., in the core wire covering line decorative fancy yarn manufactured rotation.

[0073] 这种膨松纱例如,可用如下方法制造。 [0073] Such bulky yarns, for example, can be manufactured as follows.

[0074] S卩,使从熔融炉流出的纤维熔融液通过开设有构成复丝的数目的孔的喷嘴,挤出成为芯线的复丝线条、对齐。 [0074] S Jie, so that the fibers from the melt flowing through the melt furnace defines a number of holes constituting the multifilament nozzle, extruded into multifilament core wire line, aligned. 从在构成芯线的喷嘴的周围设置的其他喷嘴挤出形成鞘线的长丝。 From other nozzles constituting the nozzle around the core wire is extruded to form filaments disposed sheath wire. 通过在形成鞘线的复丝上喷射流体(通常为空气),形成起圈或松弛,并且缠结在形成芯线的复丝线条上。 By injecting a fluid (usually air) is formed on a multifilament sheath wire, or forming looped slack, and the line in the entangled multifilament yarn forming the core wire. 从形成多个极小起圈、松弛的观点来看,喷嘴优选地使用流体乱流喷嘴、或所谓的TASLAN喷嘴。 Is formed from a plurality of tiny looped slack viewpoint, using a fluid nozzle is preferably turbulent flow nozzle, or a so-called TASLAN nozzle.

[0075] 或者也可将多根复丝线同时进行流体搅乱处理,之后,通过延伸而形成。 [0075] Alternatively, a plurality of multifilament threads may be simultaneously processed fluid upset, then, is formed by extending. 通过改变待供给至流体搅乱处理的2根复丝线之间的供给量、或改变流体搅乱处理中使用的气压, 可改变起圈或松弛的程度。 By changing the fluid to be supplied to the supply amount of upset between two multifilament threads processing, disturbing or changing fluid pressure used in the process may be changed or the degree of slack in the looped.

[0076] 构成芯线的无机纤维和构成鞘线的无机纤维可以是同种类的无机纤维,也可以是不同种类的无机纤维。 [0076] The inorganic fibers constituting the core wire and the sheath wire constituting the inorganic fibers may be inorganic fibers of the same kind, or may be different kinds of inorganic fibers.

[0077] 此外,构成芯线的无机纤维的平均纤维直径(dl)和构成鞘线的无机纤维的平均纤维直径(d2)可以相同也可以不同。 [0077] Further, the average fiber diameter of inorganic fibers constituting the core of (DL) and an average fiber diameter of the inorganic fibers constituting the sheath wire (d2) may be the same or different. 优选地,构成鞘线的第2无机纤维的平均纤维直径(d2)为构成芯线的第1无机纤维的平均纤维直径(dl)以下(即,d2彡dl)。 Preferably, the average fiber diameter of the inorganic fibers forming the second sheath wire (d2) an average fiber diameter of the core wire constituting the first inorganic fibers (DL) or less (i.e., d2 San dl).

[0078] 此外,芯线中使用的长丝不限于截面圆形,也可以是截面三角形、截面星型、截面Y 型、截面C型等异形长丝。 [0078] In addition, the filaments used in the core is not limited to a circular cross-section, a triangular cross section may be, star-shaped cross section, Y-shaped cross-section, a C-like shaped cross-section filaments. 通过采用异形截面,可提高无机纤维之间的缠绕,使得可不需要粘合剂。 By using modified cross-section, it can improve the entanglement of the inorganic fibers, so that the adhesive may not be required. 此外,使用异形截面长丝时存在绝热性优异的倾向。 In addition, excellent thermal insulation property tends using modified cross-section filaments.

[0079] 构成芯线、鞘线的无机纤维的平均纤维直径优选各自为0.5-15 μ m。 [0079] constituting the core wire, the inorganic fiber average fiber diameter of the sheath wire are each preferably 0.5-15 μ m. 若超过15 μ m,则无机纤维的刚性高,容易促进无机纤维片材间的热传导。 If more than 15 μ m, the rigidity of the inorganic fibers is high, easier to promote thermal conduction between the inorganic fiber sheet. 另一方面,若不到0. 5 μ m 则刚性过低,存在难以通过纤维的缠绕发挥固定器作用的倾向。 On the other hand, if the 0. 5 μ m is too rigid, tend to be difficult to play a role in the fixture by winding the fibers. 虽然在0. 5-3 μ m时绝热性略有劣化,但是趁着低刚性而向弯曲等部位的安装变得容易,3-15 μ m时能够进一步提高绝热性能。 Although the heat insulating property deteriorated slightly at 0. 5-3 μ m, but taking advantage of low bending rigidity is attached to the other parts becomes easy, the heat insulating performance can be further improved when 3-15 μ m.

[0080] ⑵来自膨松纱的无机纤维丝线 [0080] ⑵ inorganic fiber filaments from a bulky yarn

[0081] 将以上所述的膨松纱切割至3mm-12mm,优选4-9mm,得到无机纤维丝束。 [0081] The above-described bulky yarn cut into 3mm-12mm, preferably 4-9mm, to obtain an inorganic fiber tows. 图7及图8中,L是切割长度。 In FIG. 7 and 8, L is the length of the cut. 因此,由芯线得到的丝线的长度与切割长度L几乎相等,但由鞘线得到的曲线状丝线的长度比切割长度L更长。 Thus, the core wire obtained by cutting the length of wire substantially equal to the length L, but the length of the curve obtained from a sheath-like thread cutting length is longer than L. 具体地,虽然取决于膨松纱的种类,但在以3mm-12mm的长度切割膨松纱的情况下,通常形成长度为3mm-12mm的直线状丝线和纤维长度为6mm-25mm的具有起圈或曲线的曲线状丝线的组合。 Specifically, although depending on the kind of textured yarn, but in the case where the length of 3mm-12mm textured yarn is cut, to a length of generally straight filaments and a fiber length of 3mm-12mm 6mm-25mm is looped having or a combination of curved wire curve.

[0082] 具体地,如图8所示,除鞘线7缠绕在芯线6上的那些(图8(a))以外,还混有鞘线7的起圈7a残存(图8(b))的那些、末端上鞘线7的起圈的一部分解开而剩余的那些(图8(c))等。 [0082] Specifically, as shown in FIG. 8, in addition to the sheath wire 7 wound on the core line 6 than those (FIG. 8 (A)), the sheath further mixed with looped wire 7 remaining 7a (FIG. 8 (b) ), those on the end portion of the looped wire sheath 7 to unlock those remaining (FIG. 8 (c)) and the like. 因此,若切割长度L过短,则难以得到适于接合的曲线状丝线,难以通过抄造制作无机纤维片材。 Therefore, when the cut length L is too short, it is difficult to obtain a curved shape adapted to engage the wires, it is difficult to produce inorganic papermaking fiber sheet through. 另一方面,由于芯线中使用的长丝的平直性高,若切割长度L变长,则相对于面方向有角度地存在的直线状丝线以要戳破多个无机纤维片材面的状态存在,在多个片材间容易发生热传导,所以不优选。 On the other hand, since high flatness filament used in the core, if the cutting length L becomes longer, the surface of the wire with respect to the linear direction at an angle to the presence of a plurality of puncture inorganic fiber sheet surface state, that the heat conduction easily occurs between a plurality of sheets, it is not preferable.

[0083] <无机纤维片材的制造方法> [0083] <Method for producing the inorganic fiber sheet>

[0084] 无机纤维片材是通过搅拌、离解含有无机纤维丝束及分散剂的纤维悬浊液,将得到的纤维分散液(原料液)湿式抄造而制备的。 [0084] The inorganic fiber sheet is obtained by stirring, a dispersion fiber (raw material solution) obtained wet papermaking dissociation prepared suspension containing fibers and an inorganic fiber tow dispersant.

[0085] 作为无机纤维丝束,可使用另外制造的含有曲线状丝线的丝束,但使用所述来自波形赋形线的丝束或来自膨松纱的丝束在制造上是便利的。 [0085] As the inorganic fibrous tow, the tow may be used additionally containing a curved wire manufactured, but using the tow lines from the waveform shaping from the textured yarn or tow in the manufacture is facilitated. 此外,与使用独立存在的丝线的集合体的情况相比,存在接合的丝线的存在比例更高的倾向,因而作为片材的强度、稳定性提1¾。 Further, as compared with the case where the presence of independent wire assembly, there is a higher proportion of the presence of thread engagement tends, therefore the strength of the sheet, provide stability 1¾.

[0086] (1)原料液的调制 Modulation [0086] (1) Raw material liquid

[0087] 原料液(纤维分散液)可通过将无机纤维丝束及分散剂添加到作为分散介质的水中,搅拌、离解来制备。 [0087] The raw material liquid (dispersion of fibers) can be prepared by adding the inorganic fiber strands and dispersant in water as a dispersion medium, with stirring, to prepare dissociated. 在由复丝得到的丝束的情况下,在该搅拌的阶段优选离解成独立的无机纤维丝线。 In the case where the strands obtained multifilament, preferably at the stage of the stirred solution into separate filaments from the inorganic fibers. 搅拌、离解相当于造纸的打浆步骤,可利用精制机(refiner)等进行,优选设定成将复丝离解成独立的纤维的程度的处理条件(温度、转速、压力等),以使玻璃纤维不折损。 Stirring, dissociating equivalent pulping step papermaking may be utilized refiner (Refiner) or the like, preferably set to a multifilament dissociated into individual fibers the degree of treatment conditions (temperature, speed, pressure, etc.), so that the glass fibers no impairment.

[0088] 所述分散剂以可以使后述的搅拌步骤中由复丝构成的所述纤维丝束容易离解成独立的纤维,进一步在水中稳定地分散的方式配入。 [0088] The dispersant to the fiber tow after the stirring step can be described later constituting the multifilament readily dissociates into individual fibers, further stably dispersed in water with the embodiment. 作为分散剂可使用例如聚亚烷基二醇脂肪酸酯型的非离子性表面活性剂等。 May be used, for example, polyalkylene glycol fatty acid ester type nonionic surface active agent as a dispersant.

[0089] 分散剂没有特别限定,通常优选相对于纤维丝线100质量份配合0. 5-2质量份。 [0089] The dispersant is not particularly limited, preferably with respect to 100 parts by mass of the fiber filaments with 0. 5-2 parts by mass.

[0090] 在使用来自波形赋形线的无机纤维丝束的情况下,因为几乎所有的丝线都是曲线状丝线,所以原料液中形成多个曲线状无机纤维丝线随机分散,并且至少一部分曲线状无机纤维丝线与其他的曲线状无机纤维丝线接合的状态。 [0090] In the case where the inorganic fiber tows from the waveform shaping line, because almost all of the wires are curved wire, forming a plurality of liquid raw material so curved filaments randomly dispersed inorganic fibers, and at least a portion of the curved the inorganic fiber filaments with other fibers of inorganic filaments engaged the curved state.

[0091] 此外,在使用来自膨松纱的无机纤维丝线作为无机纤维丝线的情况下,在原料液的调制步骤中,纤维丝线的鞘线从芯线上解开,并且,构成鞘线、芯线的复丝离解成独立的纤维。 [0091] Further, in the case where the inorganic fibers from the threads of textured yarn filaments as the inorganic fibers, the raw material solution at the modulation step, the fiber threads from the sheath core wire line untied, and the cord constituting the sheath, the core multifilament wire dissociated into individual fibers. 因此,原料液中,形成来自芯线的纤维长度为3-12mm的平直性相对高的无机纤维丝线和来自鞘线的曲线状的无机纤维丝线混合的状态,该曲线状的无机纤维丝线是纤维长度为6-25mm左右、残存起圈形状或对波形状等实施所谓的卷曲加工而成的状态。 Thus, the liquid raw material, forming fibers from the length of the core wire is relatively high straightness 3-12mm inorganic fibers and filaments curved inorganic fibers from the sheath wire filaments mixed state, the curved filaments are inorganic fibers a fiber length of about 6-25mm, remains looped shape or a so-called crimped state of the wave shape from other embodiments. 而且,可认为,来自鞘线的曲线状丝线的曲线形成固定器,来自芯线的直线状的丝线和来自鞘线的曲线状的丝线以缠绕、物理地系住的状态分散。 Further, it is considered, from a curved wire sheath wire holder is formed curved, straight wires and the core wire from the curved line to the sheath from a wire wound roped physically dispersed. 即,形成以直线状丝线和曲线状丝线微丝(fibril)化(分枝化)的状态分散的状态。 That is, a dispersed state in a straight wire and a curved wire fibrils (fibril) of (branch of) a.

[0092] 代替来自膨松纱的纤维丝束,例如,可考虑使用分别准备长度为3mm-12mm的直线状丝线和长度为6mm-25mm的具有起圈或曲线的曲线状丝线,配合、调制而成的原料液。 [0092] Instead of fiber tows from bulky yarns, for example, may be considered to prepare respectively a length of 3mm-12mm and a length of straight wire 6mm-25mm wire having a looped curved shape or curve fitting, modulation into the raw material liquid. 但是,一般地,得到这种经卷曲加工的6-25mm左右长度的曲线状丝线在制造上不容易,此外, 通过在玻璃纤维不折损的条件下搅拌而使独立存在的曲线状丝线和直线状丝线以形成分枝状的方式缠绕实质上是困难的。 However, in general, obtained by such a crimped wire around the curved length of 6-25mm in manufacturing is not easy, moreover, by stirring under the conditions of the breakage of the glass fibers are not curved and straight filaments exist independently thread-like manner to form a branched winding is substantially difficult. 从这样的理由出发,使用来自膨松纱的丝束有意义。 From this reason, the use of textured yarn from a tow meaningful. [0093] 如上所述调制的原料液中,曲线状无机纤维丝线混合有各自独立分散的那些和丝线彼此之间接合的那些。 [0093] The starting material was prepared as described above, the curved shape of the inorganic fibers mixed with filaments that are each independently of one another engagement between the dispersion and those wires.

[0094] 在来自波形赋形线的无机纤维丝束的情况下,可如图9(a) (b)的方式缠绕。 [0094] In the case where the inorganic fiber strands from the waveform shaping lines, can be shown in FIG 9 (a) (b) winding manner. 图9 (a)示出波长为1周期部分的无机纤维丝线之间缠绕的情况,图9 (b)示出波长为1/2周期部分的无机纤维丝线之间缠绕的情况。 FIG. 9 (a) shows a case where the wire is wound between the inorganic fibers having a wavelength of one cycle portion, FIG. 9 (b) shows the case where the wire is wound between the inorganic fibers having a wavelength of 1/2 period portion.

[0095] 如来自膨松纱的无机纤维丝线那样,在直线状无机纤维丝线和曲线状无机纤维丝线的混合物的情况下,如图10所示,通过直线状无机纤维丝线8接合到曲线状无机纤维丝线9上,直线状丝线也可作为丝束的一部分进行接合。 [0095] The inorganic fiber filaments bulky yarn from the above, in case of a mixture of linear and curved wire inorganic fiber-shaped inorganic fiber filaments, 10, joined by a straight line to the curved shape of the inorganic fiber-shaped inorganic filaments 8 9 fiber filaments, straight filaments may be joined as part of the tow. 在这点上,通过使用来自芯线的丝线或来自鞘线的丝线缠绕的膨松纱的短切丝,容易得到还含有直线状丝线、缠绕成分枝状的无机纤维丝束的分散液。 In this regard, by using a wire from a wire or chopped wire winding from the bulky yarn sheath wire can be easily obtained further contains a straight wire, the branch component dispersion of inorganic fibers wound tow. 通过这样的缠绕,即使没有粘合剂,也可制作整体在面方向上定向的薄层无机纤维片材。 With this winding, even without adhesives, may be a thin layer of an inorganic fiber sheet made integrally oriented in the surface direction.

[0096] 如上所述,由于分散液中曲线状无机纤维丝线之间或曲线状无机纤维丝线和直线状无机纤维丝线缠绕,因此即使不用粘合剂也可形成薄片状,但根据需要,也可添加配合无机粘合剂。 [0096] As described above, since the dispersion of the inorganic fibers or filaments and curved linear curve between the wire winding an inorganic fiber-shaped inorganic fiber filaments liquid, even when formed without a binder may be a sheet, but if necessary, may be added an inorganic binder.

[0097] 所述无机粘合剂是胶体二氧化硅、氧化铝溶胶等具有粘着性的物质,并且二氧化硅或氧化铝优选使用构成链状、念珠状、针状的稳定的二次粒子的二氧化硅或氧化铝。 [0097] The inorganic binder is colloidal silica, alumina sol material having adhesive properties, and silica or alumina used is preferably composed of a chain, beaded, needle stable secondary particles silica or alumina. 具体地,原料液中含有二次粒子的长径为0. 01 μ m-2 μ m左右的二氧化硅或氧化铝作为在水中分散的胶体溶胶。 Specifically, the raw material liquid contains the major axis of the secondary particles was 0. 01 μ m-2 of approximately μ m silica or alumina dispersed in water as a colloidal sol. 这种无机粘合剂能够稳定地附着在纤维表面,能够防止抽真空时的飞散、 在真空绝热材料的容器内的飞散。 The inorganic binder can be stably attached to the surface of the fiber, can be prevented from scattering at the time of evacuation, in a scattering vacuum insulation material of the container. 这样,本发明中使用的无机粘合剂在不易从无机纤维片材处散落或飞散的方面与在玻璃棉中混入短纤维、硬粒不同。 Thus, the inorganic binder used in the present invention in easily scattered or scattered from the inorganic fibrous sheet material is mixed with the staple fibers of glass wool, different durum.

[0098] 此外,所述无机粘合剂粒子的含量相对于100质量份无机纤维丝线,优选为2质量份以下,更优选为1质量份以下,进一步优选为〇. 5质量份以下。 [0098] Further, the content of the inorganic binder particles with respect to 100 parts by mass of the inorganic fiber filaments, preferably 2 parts by mass or less, more preferably 1 parts by mass or less, more preferably square. 5 parts by mass or less.

[0099] (2)湿式抄造 [0099] (2) a wet papermaking

[0100] 将按上述调制的原料液进行湿式抄造,薄片化。 [0100] prepared as described above starting material liquid will wet papermaking, exfoliated. 湿式抄造的方法(抄纸步骤)没有特别限定,例如,按以下的方法进行。 Process (papermaking step) wet papermaking is not particularly limited, for example, carried out in the following manner.

[0101] 抄造通常用网部(Wire part)和干燥部组合的系统进行。 [0101] papermaking process is usually carried out by screen portion (Wire part) and drying the combined system unit.

[0102] 具体地,不作为限定,将调制的原料液从进浆口向网部喷出,在网上移动,同时水向网下流出、脱水,进一步抽吸、脱水,形成含水网络。 [0102] Specifically, not by way of limitation, modulation of the raw material liquid is discharged from the stock inlet to the network part, the mobile Internet, to the network while the water flows out, dehydration, and further suction dehydration, to form an aqueous network. 接下来,在压制部在压制辊和毡毯之间压榨、脱水,在干燥部进一步蒸发干燥水分,得到无机纤维片材。 Subsequently, the pressing portion between the pressing roller and the carpet pressing, dehydration, and dried in the drying section further evaporation of water, to obtain an inorganic fiber sheet. 在网部可使用长网抄纸机、短网抄纸机、倾斜网型抄纸机等公知的抄纸机。 In the wire section can be used a Fourdrinier paper machine, a short-wire paper machine, an inclined type paper machine network a known paper machine.

[0103] 无机纤维片材的基重优选采用30-600g/m2。 [0103] The basis weight of the inorganic fiber sheet is preferably employed 30-600g / m2. 不到30g/m2时,因为无机纤维片材内中存在的空隙的直径变大,对气体的热传导率的影响变大,所以存在作为真空绝热材料绝热性能下降的倾向。 When less than 30g / m2, since the presence of voids in the inorganic fiber sheet larger diameter, the influence of the thermal conductivity of the gas is increased, there tends to decrease as the vacuum heat insulating ability of the insulating material. 另一方面,若超过600g/m 2,则由玻璃纤维制造无纺布时的干燥效率下降,生产率下降,所以不优选。 On the other hand, if it exceeds 600g / m 2, the drying efficiency is decreased by a nonwoven fabric made of fiberglass, productivity is lowered, which is not preferable.

[0104] 如上所述制作的无机纤维片材,例如,在使用来自膨松纱的无机纤维丝束的情况下,如图11所示,来自芯线的直线状的无机纤维丝线8和来自鞘线的曲线状的无机纤维丝线9缠绕,此外在含有无机粘合剂的情况下,无机粘合剂20以附着在直线状无机纤维丝线8和/或曲线状的无机纤维9的表面上的方式,形成薄片状。 [0104] prepared as described above inorganic fiber sheet, for example, in the case of inorganic fiber tows from the textured yarn, 11, straight from the core wires 8 and inorganic fibers from the sheath the curved line wires 9 wound inorganic fibers, an inorganic binder containing in addition, the inorganic binder 20 to be attached to the surface of the inorganic fiber filaments 8 linear and / or curved in a manner that the inorganic fibers 9 to form a sheet.

[0105] 在如上所述制作的无机纤维片材中,构成片材的曲线状无机纤维丝线的大部分随机分散形成平面。 [0105] In the inorganic fiber sheet produced as described above, most of the curve constituting the sheet-shaped inorganic fiber filaments randomly dispersed to form a plane. 但是,一部分的曲线状无机纤维丝线以在所述平面内或在层叠的平面之间交联的方式缠绕存在。 However, part of the inorganic fiber filaments in a curved manner in a plane, or the plane between the laminated crosslinked wound exists. 从和曲线状无机纤维丝线的波长的关系来看,在不交联多个层时, 由于这种缠绕存在比例少,所以起因于由缠绕引起的热传导等的绝热性的下降小。 And a wavelength smaller from the curved shape of the inorganic fiber filaments relationship point of view, when not crosslinked plurality of layers, due to the presence of a small proportion of this winding, the other due to thermal conduction from the winding due to a decrease in heat insulating property. 而且能够通过缠绕减少所需的粘合剂量。 But also by reducing the amount of adhesive required for the winding. 此外,一部分的无机纤维丝线可以以从平面突出的方式存在,但从和曲线状无机纤维丝线的峰部高度Η的关系来看,即使在丝线的一部分从无机纤维片材表面突出的情况下,突出部分也几乎不会戳破层叠的多个无机纤维片材。 In addition, part of the inorganic fiber filaments may protrude from the plane of the presence, but the curve shape of the inorganic fibers and filaments peak height Η of view, even in a part of the inorganic fiber sheet projecting from the surface of the wires of the case, projecting portion is hardly punctured a plurality of stacked sheets of inorganic fibers. 因此,结果为:在作为本发明的真空绝热材料的构成要素的无机纤维片材中,缠绕的无机纤维丝线的存在、从平面突出的曲线状无机纤维丝线的存在,与丝线的缠绕、突出等引起的绝热性的下降相比,导致减少所需的粘合剂量的效果更大,因而能够实现绝热性的提高。 Thus, the result is: an inorganic fiber sheet as the vacuum insulation material of the present invention, structural elements, the presence of an inorganic fiber filaments wound, the presence of the planar projection of the curved shape of the inorganic fiber filaments with wire winding, protrusion, etc. compared adiabatic drop caused, resulting in a greater reduction in the required amount of binder effect, and thus the heat insulating property can be improved.

[0106] 在来自膨松纱的无机纤维丝线的情况下,不仅含有曲线状丝线,还含有直线状丝线。 [0106] In the case of the inorganic fibers from the threads of textured yarn contains not only a curved wire, further comprising a linear wire. 但是,由于直线状丝线与曲线状丝线的接合,存在抑制以与面方向垂直的角度定向的倾向。 However, since the bonding wires straight and curved wires, the presence of inhibitory angle oriented in the direction perpendicular to the plane of the tendency. 而且由于曲线状丝线将会卷曲,故难以以与面方向垂直的角度定向,而是以纤维的长度方向沿着厚度方向的方式定向。 And because the wire will be crimped curved, it is difficult at an angle to the plane perpendicular to the direction of orientation, but in the longitudinal direction of the fibers oriented in the thickness direction along the way. 因此,即使在直线状丝线或曲线状丝线要从无机纤维片材表面突出的情况下,也几乎不会戳破层叠的多个无机纤维片材,和使用来自波形赋形线的无机纤维丝束的情况同样地,结果是与丝线的缠绕、突出等引起绝热性的下降相比,导致减少所需的粘合剂量的效果更大,因而能够实现绝热性的提高。 Thus, even in a straight or curved wire filaments from the surface of the inorganic fiber sheet projecting case, hardly punctured a plurality of stacked sheets of inorganic fibers, inorganic fibers, and tow lines from the waveform shaping similarly to the case, with the result that the wire is wound, protrudes caused by decreased adiabatic properties compared to the amount of the binder results in a greater reduction of the required effect, and thus the heat insulating property can be improved.

[0107] <真空绝热材料的制造> [0107] <vacuum insulation material>

[0108] (1)层叠体的制造 Manufacturing [0108] (1) laminate

[0109] 将多片如上所述制作的无机纤维片材1层叠,形成层叠体10。 [0109] The multi-piece prepared as above inorganic fiber sheet laminate 1, laminate 10 is formed. 层叠体的制备仅层叠、压缩无机纤维片材即可。 Preparation of multilayer laminate is only compressed to an inorganic fiber sheet. 从无机纤维片材的面突出的来自鞘线的第2无机纤维的起圈或松弛的一部分相对于层叠的无机纤维片材,可作为固定器起作用。 Laminating the inorganic fiber sheet, and can act from the looped face of the second inorganic fibers projecting from the sheath wire inorganic fiber sheet or a portion of a loose holder.

[0110] 可作为固定器使用的纤维使层叠的无机纤维片材之间进行热传导,但一般地,由与层叠的无机纤维片材的接触或在层叠的无机纤维片材的纤维间间隙中作为固定器的嵌入程度引起的热传导、绝热性的下降不成为问题。 [0110] may be serving as a fiber holder used between the laminated inorganic fiber sheet heat conduction, but in general, as by the contact with an inorganic fiber sheet laminated or between the fiber interstices of the inorganic fiber sheet laminated in thermal conduction embedded to the extent of the fixture, the heat insulating property drop is not a problem.

[0111] (2)外包装材料 [0111] (2) the outer cover material

[0112] 外包装材料11是将阻气性优异的膜作成袋状的材料。 [0112] The packaging material 11 is excellent in a gas barrier film made of the bag-like material. 作为阻气性优异的膜,通常,将阻气性优异的乙烯-乙烯醇共聚物树脂膜、铝等金属蒸镀膜或铝等金属箔作为中间层使用,其两个表面上使用层叠了高密度聚乙烯、聚丙烯、聚酰胺膜等热塑性树脂膜的层叠膜。 As a film excellent in gas barrier property, usually, the excellent gas barrier ethylene - vinyl alcohol copolymer resin film and the like, a metal such as an aluminum deposition film or aluminum foil as a metal intermediate layer, which is laminated on both surfaces using a high density polyethylene, polypropylene, a polyamide film, a laminated film of a thermoplastic resin film.

[0113] 在封闭所述层叠膜的三边的袋内,容纳如上所述制作的层叠体10,抽真空后,通过将空的边热熔接,进行封闭,从而真空密封。 [0113] In closing the bag three sides of the laminated film, the laminate fabricated as described above to accommodate 10, after evacuation, by thermal fusion empty side, will be closed, so that a vacuum seal.

[0114] 为保持真空绝热材料的初期绝热性能及随时间的绝热性能,外包装内,除了层叠体以外还可封入气体吸附剂、水分吸附剂等吸气剂。 [0114] In order to maintain the initial heat insulating performance of the vacuum insulation material and insulation performance over time, the inner packaging, in addition to the laminate may be sealed gas adsorbent, moisture getter adsorbent.

[0115] 具有如上的构成的真空绝热材料不存在即使真空度高也会挥发的有机粘合剂、飞散的微粒子、短纤维,因而能够长时间保持初期的绝热特性。 [0115] having the above configuration of the vacuum insulation material does not exist even if a high vacuum is also volatile organic binder, scattering particles, short fibers, it is possible to maintain the heat insulating properties of the initial time.

[0116] 工业上的可利用性 [0116] INDUSTRIAL APPLICABILITY

[0117] 本发明的真空绝热材料,在构成绝热材料主体的层叠体中不含有会挥发、对流的有机粘合剂、微粒,因而绝热性随时间的劣化变少。 [0117] The vacuum insulation material of the present invention, will not contain volatile, organic binder convection, heat-insulating fine particles constituting the laminate material of the body, and thus less heat insulating property becomes deteriorated with time. 因此,可用作需要长时间、高度的绝热性的机器的绝热材料。 Therefore, long time is required may be used as the insulating material of the insulation properties of the height of the machine. 本发明的制造方法可用作本发明的真空绝热材料的制造方法。 Method of the present invention are useful as a method for producing a vacuum insulation material of the present invention.

[0118] 附图标记说明 [0118] REFERENCE NUMERALS

[0119] 1无机纤维片材 [0119] The inorganic fiber sheet 1

[0120] 7粘合剂 [0120] adhesive 7

[0121] 2, 2'直线状长丝 [0121] 2, 2 'filament linear

[0122] 3, 3' 齿轮 [0122] 3, 3 'gear

[0123] 5波形赋形长丝 [0123] waveforms shaped filaments 5

[0124] 6 芯线 [0124] core 6

[0125] 7 鞘线 [0125] 7 wire sheath

[0126] 8来自芯线的丝线 [0126] thread 8 from the core wire

[0127] 9来自鞘线的丝线 [0127] 9 from the sheath wire line

[0128] 10层叠体 [0128] 10 laminated body

[0129] 11外包装材料 [0129] 11 outer wrapper

[0130] 20粘合剂 [0130] 20 adhesive

Claims (12)

1. 真空绝热材料,包括无机纤维片材的层叠体和真空密封该层叠体形成的外包装材料,其中, 在所述无机纤维片材中,含有切割长度(L) 3-12mm的曲线状无机纤维丝线的无机纤维丝束随机分散,并且所述无机纤维丝束的至少一部分彼此接合。 1. The vacuum insulation material, the laminate comprising an inorganic fiber sheet and a vacuum sealing material of the outer laminate is formed, wherein, in the inorganic fiber sheet, comprising a cut length (L) 3-12mm inorganic curved shape fiber tow filaments randomly dispersed inorganic fibers, the inorganic fiber strands and at least a portion engaged with each other.
2. 权利要求1所述的真空绝热材料,其中所述曲线状无机纤维丝线是将被赋予了由曲线构成的波形形状的长丝以成为所述波形的1/2-1周期的方式以3mm-12mm的间隔切割而成。 The vacuum insulation material according to claim 1, wherein said inorganic fiber wires is curved to be given a wave shape of the filaments formed by a curve as to be a 1/2-cycle of the waveform to 3mm -12mm spacing are cut.
3. 权利要求2所述的真空绝热材料,其中所述曲线状无机纤维丝线的峰部高度(振幅的2倍值)是l_6mm。 The vacuum insulation material according to claim 2, wherein the height of the peak portion of the curved-shaped inorganic fiber filaments (2 times the value of the amplitude) is l_6mm.
4. 权利要求1所述的真空绝热材料,其中所述无机纤维丝束是将膨松纱以3mm-12mm的长度切割而得到,所述膨松纱含有复丝的芯线和在该芯线的表面上形成起圈和/或松弛并缠结的复丝的鞘线, 所述曲线状无机纤维丝线通过切割构成所述鞘线的复丝而得到。 The vacuum insulation material according to claim 1, wherein said inorganic fiber tow is bulky yarns 3mm-12mm cut length is obtained, containing said bulky multifilament yarn core wire and the core wire is formed on the surface looped and / or loose and entangled multifilament sheath wire, the curved shape of the inorganic fibers obtained by cutting the filaments constituting the multifilament sheath wire.
5. 权利要求4所述的真空绝热材料,其中所述曲线状无机纤维丝线是具有长度为6mm-25mm的起圈或曲线的丝线。 The vacuum insulation material according to claim 4, wherein said curved inorganic fiber filaments having a length of looped wire of 6mm-25mm or curvilinear.
6. 权利要求4或5所述的真空绝热材料,其中构成所述芯线的复丝是截面异形纤维。 The vacuum insulation material of claim 4 or claim 5, wherein the multifilament core is a cross-sectional shaped fibers.
7. 权利要求1-6任意一项所述的真空绝热材料,其中所述无机纤维丝线的纤维直径是0· 5-15 μ m〇 7. any of claims 1 to 6 one of the vacuum insulation material, wherein the inorganic fiber filaments fiber diameter 0 · 5-15 μ m〇
8. 权利要求1-7任意一项所述的真空绝热材料,所述无机纤维丝线是玻璃纤维。 Any one of the vacuum insulation material according to claims 1 to 7, the inorganic fiber filaments are glass fibers.
9. 权利要求1-8任意一项所述的真空绝热材料,所述无机纤维片材是通过将所述无机纤维丝线的分散液湿式抄造得到。 9. The vacuum insulation material according to any one of claims 1-8, said inorganic fiber sheet is obtained by the papermaking fibers of the inorganic dispersion wet filaments.
10. 权利要求1-9任意一项所述的真空绝热材料,所述曲线状丝线的含有率为所述无机纤维丝线整体的15%以上。 The vacuum insulation material according to any one of claims 1 to 9, the curved ratio of the filaments comprising 15% or more of the inorganic fibers integrally wires.
11. 真空绝热材料的制造方法,所述真空绝热材料包括无机纤维片材的层叠体和真空密封该层叠体形成的外包装材料,所述制造方法的特征在于, 包括: 原料液调制步骤,搅拌含有无机纤维丝束和分散剂的纤维悬浊液而调制纤维分散液; 和抄纸步骤,湿式抄造得到的所述纤维分散液而制作无机纤维片材, 作为所述无机纤维丝束,使用将膨松纱以3mm-12mm的长度切割形成的无机纤维丝线, 所述膨松纱含有复丝的芯线和在该芯线的表面上形成起圈和/或松弛并缠结的复丝的鞘线。 11. A method for producing a vacuum insulation material of the vacuum heat insulating material comprises a laminate of the inorganic fiber sheet and a vacuum sealing material of the outer laminate is formed, characterized in that said manufacturing method, comprising: a modulation step feed solution stirred inorganic fiber suspension containing fiber tows and a dispersant to prepare a dispersion fiber; and a step of papermaking, the wet papermaking fiber dispersion obtained to prepare the inorganic fiber sheet, as the inorganic fibrous tow, the use of the inorganic fiber textured yarn filaments to a length of 3mm-12mm cut is formed, the core textured yarn comprising a multifilament and the looped or slack formed and entangled multifilament / on the surface of the core wire sheath line.
12. 无机纤维片材的制造方法,所述无机纤维片材用于含有所述无机纤维片材的层叠体和真空密封该层叠体形成的外包装材料的真空绝热材料,所述制造方法特征在于,包括: 原料液调制步骤,搅拌含有无机纤维丝束和分散剂的纤维悬浊液而调制纤维分散液; 和抄纸步骤,湿式抄造得到的所述纤维分散液而制作无机纤维片材, 并且包括湿式抄造所述无机纤维丝束的分散液的步骤, 所述无机纤维丝束是处于由曲线构成的波形的1/2-1周期且波长为3mm-12mm的无机纤维丝线。 12. A method of producing an inorganic fiber sheet, said inorganic fiber sheet outer packaging material for a vacuum insulation material comprising an inorganic fiber sheet of the laminate and the vacuum sealing of the laminate is formed, the manufacturing method characterized in that , comprising: a modulation step feed solution, stirred suspension of inorganic fiber tows comprising fibers and a dispersant to prepare a dispersion fiber; and a step of papermaking, the wet papermaking fiber dispersion obtained to prepare the inorganic fiber sheet, and comprising the step of wet sheet making the dispersion of the inorganic fiber strands, the inorganic fibers are in tow 1 / 2-1 cycle waveform is formed by a curve having a wavelength of 3mm-12mm, and inorganic fibers filaments.
CN201380008960.6A 2012-02-14 2013-02-08 Vacuum heat insulation materials and manufacture method thereof CN104105917B (en)

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