WO2022210020A1 - 無機繊維シート - Google Patents

無機繊維シート Download PDF

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Publication number
WO2022210020A1
WO2022210020A1 PCT/JP2022/012590 JP2022012590W WO2022210020A1 WO 2022210020 A1 WO2022210020 A1 WO 2022210020A1 JP 2022012590 W JP2022012590 W JP 2022012590W WO 2022210020 A1 WO2022210020 A1 WO 2022210020A1
Authority
WO
WIPO (PCT)
Prior art keywords
fiber sheet
inorganic fiber
inorganic
sheet
per unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/012590
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
琢也 本条
大和 松本
友樹 古江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tomoegawa Co Ltd
Original Assignee
Tomoegawa Paper Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tomoegawa Paper Co Ltd filed Critical Tomoegawa Paper Co Ltd
Priority to JP2023510976A priority Critical patent/JP7854427B2/ja
Priority to EP22780235.2A priority patent/EP4317579B1/en
Priority to US18/552,787 priority patent/US12540437B2/en
Priority to CN202280013863.5A priority patent/CN116848301B/zh
Publication of WO2022210020A1 publication Critical patent/WO2022210020A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-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
    • D04H1/42—Non-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
    • D04H1/4209—Inorganic fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-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
    • D04H1/42—Non-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
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • D04H1/43838—Ultrafine fibres, e.g. microfibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/732—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/36—Inorganic fibres or flakes
    • D21H13/38—Inorganic fibres or flakes siliceous
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
    • D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/04—Arrangements using dry fillers, e.g. using slag wool
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2101/00—Inorganic fibres
    • D10B2101/02—Inorganic fibres based on oxides or oxide ceramics, e.g. silicates
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2403/00—Details of fabric structure established in the fabric forming process
    • D10B2403/02—Cross-sectional features
    • D10B2403/024—Fabric incorporating additional compounds

Definitions

  • the present invention relates to inorganic fiber sheets.
  • inorganic fiber sheets such as rock wool paper and AES (alkaline earth silicate) paper are widely used as heat insulating materials and heat insulating materials.
  • inorganic fiber sheets are made from inorganic fibers, but particles called shot are always formed at the ends of such inorganic fibers during the fiber manufacturing process.
  • this shot-attached fiber is made into paper by a conventional method, the shot tends to be localized near the surface of the fiber sheet.
  • a coating agent such as a pressure-sensitive adhesive or adhesive is applied to the surface of the fiber sheet, the shot falls off together with the coating agent due to impact or the like, which is desirable. There was a problem that tackiness or adhesiveness could not be obtained.
  • Patent Document 1 proposes to separate the shot in the manufacturing process to reduce the concentration of the shot itself in the papermaking sheet. Further, Patent Document 2 proposes a method of centrifuging a paper raw material liquid in which inorganic fibers are dispersed and passing it through a screen filter or the like to reduce the concentration of shot.
  • an object of the present invention is to provide an inorganic fiber sheet that has high workability, etc., and is also excellent in adhesiveness or adhesiveness when a pressure-sensitive adhesive or adhesive is applied.
  • the inorganic fiber sheets according to Patent Document 1 and Patent Document 2 both require a process for removing shot from the inorganic fibers, which has the problem of lowering production efficiency and lowering the yield rate of raw materials.
  • the second object of the present invention is to provide an inorganic fiber sheet that can be manufactured without lowering the production efficiency and the yield rate of raw materials.
  • the present inventors found that the above problem can be solved by setting the shot distribution state in the inorganic fiber sheet to a specific range, and completed the present invention. That is, the present invention is as follows.
  • the present invention provides an inorganic fiber sheet that is a nonwoven fabric containing inorganic fibers,
  • the inorganic fiber sheet has a thickness T of 1 mm or more,
  • the inorganic fiber sheet contains shots derived from inorganic fibers and having a diameter of 45 ⁇ m or more,
  • the inorganic fiber sheet is characterized in that the shot contained in the inorganic fiber sheet is distributed in the sheet thickness direction as represented by the following formula 1.
  • (Formula 1) 1-Y/X ⁇ 0.11 In Formula 1, X represents "total weight of shots in inorganic fiber sheet per unit area"/"total weight of inorganic fiber sheet per unit area".
  • Y represents "wire side surface of inorganic fiber sheet as a reference plane, the weight of the shot per unit area contained in the inorganic fiber sheet from which the thickness t portion satisfying 0 ⁇ t ⁇ s (however, 0.10 mm ⁇ s ⁇ 0.55 mm) is removed / “Inorganic Using the wire side surface of the fiber sheet as a reference surface, the weight per unit area of the inorganic fiber sheet with the thickness t removed.)
  • the inorganic fibers have a fiber length of 600 ⁇ m or more.
  • the content of the organic component in the inorganic fiber sheet is preferably 5.4 to 10.1% by mass based on the total weight of the inorganic fiber sheet.
  • an inorganic fiber sheet that has high workability, etc., and is also excellent in adhesiveness or adhesiveness when a pressure-sensitive adhesive or adhesive is applied. Moreover, this inorganic fiber sheet can be manufactured without lowering the production efficiency and the yield rate of raw materials.
  • FIG. 1 is a conceptual diagram of an inorganic fiber sheet manufacturing apparatus.
  • the present invention is not limited to the following.
  • the physical properties and evaluation of the inorganic fiber sheet shall be measured on the sample after standing for 12 hours in an atmosphere of 23°C/50% RH.
  • the inorganic fiber sheet includes at least inorganic fibers and shots derived from inorganic fibers. Moreover, the inorganic fiber sheet may contain other components. Moreover, the inorganic fiber sheet may contain other layers, for example, an adhesive layer or an adhesive layer may be laminated.
  • the density of the inorganic fiber sheet is preferably 50-1000 kg/m 3 , more preferably 100-500 kg/m 3 , particularly preferably 150-300 kg/m 3 . By setting the density of the inorganic fiber sheet within this range, it is possible to prevent the shot from falling off and to improve the mechanical strength and heat insulating properties.
  • the thickness T of the inorganic fiber sheet is preferably 1 mm or more, more preferably 1 to 50 mm, in order to optimize the distribution of shots, which will be described later, and to obtain sufficient heat insulation. 2 to 6 mm is particularly preferred.
  • the material constituting the inorganic fiber is not particularly limited as long as it can be formed into an inorganic fiber sheet. Examples include metals such as stainless steel fiber, nickel fiber, copper fiber, aluminum fiber, silver fiber, gold fiber, and titanium fiber. Fiber, glass fiber, carbon fiber, silica fiber, rock wool, slag wool, alumina fiber, ceramic fiber and the like can be used. Only one type of inorganic fiber may be used, or two or more types may be included.
  • the fiber length of the inorganic fibers is preferably 500 ⁇ m or more, more preferably 600 ⁇ m or more, even more preferably 1000 to 3000 ⁇ m, particularly preferably 1000 to 2000 ⁇ m.
  • the fiber diameter of the inorganic fibers is preferably 1-50 ⁇ m, more preferably 1-30 ⁇ m.
  • the fiber length of an inorganic fiber is measured by the following methods. First, 0.1 g of a sample, or in the case of a sheet, a sample burned at 900° C. is dispersed in 10 g of water and stirred for 1 minute with a spatula. Next, one drop of the dispersion is placed on a preparation using a dropper, and a cover film is placed on the preparation. Thereafter, the sample was observed with a microscope at a magnification of 100 times, measured at 20 points in descending order of fiber length, and the average value of the 20 points was taken as the fiber length of the sample. Moreover, the fiber diameter of an inorganic fiber is measured by the following methods.
  • 0.1 g of a sample, or in the case of a sheet, a sample burned at 900° C. is dispersed in 10 g of water and stirred for 1 minute with a spatula.
  • one drop of the dispersion is placed on a preparation using a dropper, and a cover film is placed on the preparation.
  • the sample is observed with a microscope at a magnification of 500 times, the fiber diameter is randomly measured at 20 points, and the average value of the 20 points is taken as the fiber diameter of the sample.
  • the inorganic fiber sheet contains a predetermined amount of shots (shots derived from inorganic fibers) having a diameter of 45 ⁇ m or more.
  • shots shots derived from inorganic fibers
  • the upper limit of the diameter of the shot is not particularly limited because it depends on the diameter of the inorganic fiber, but is 5000 ⁇ m, 1000 ⁇ m, 500 ⁇ m, or the like.
  • shots with a diameter of 45 ⁇ m or more are distributed in the sheet thickness direction within the inorganic fiber sheet as represented by the following formula 1.
  • “1-Y/X” is more preferably 0.06 or less.
  • the lower limit of “1-Y/X” is not particularly limited, but is -0.11, -0.10, -0.5 or 0.00, for example.
  • the weight of shot in the inorganic fiber sheet per unit area can be measured according to JISR3311-1991. More specifically, the method for measuring the shot content in the inorganic fiber sheet is as follows. A sample weighing 2 g is burned in an electric furnace at 900° C. for 30 minutes to be incinerated. The weight of the combustion residue and the weight of a 45 ⁇ m mesh stainless sieve (JIS Z-8801) are measured. The combustion residue is transferred to a sieve and crushed under pressure to remove fibers. The shot content is calculated from the weight of the shot remaining on the sieve and the weight of the combustion residue.
  • an inorganic fiber sheet from which a thickness t portion satisfying 0 ⁇ t ⁇ s (however, 0.10 mm ⁇ s ⁇ 0.55 mm) is removed using the wire side surface of the inorganic fiber sheet as a reference surface)
  • 5000NS tape manufactured by Nitto Denko Co., Ltd.
  • 5000NS is applied and laminated at a roll temperature of 80° C., a pressure of 0.05 MPa, and a speed of 0.4 m/min. After that, the sample is left at room temperature for 10 minutes, the tape is peeled off over 5 seconds, and a part of the sample is removed in the thickness direction.
  • the distribution of shots differs between the vicinity of the surface and the vicinity of the center of the thickness. That is, in the inorganic fiber sheet, a high-density region with a high shot content is formed near the center of the thickness, while a low-density region with a low shot content is formed near the surface.
  • a high-density region with a high shot content is formed near the center of the thickness
  • a low-density region with a low shot content is formed near the surface.
  • ⁇ Other Ingredients>> Other components include known components including organic components such as binders, paper strength agents, and organic fibers.
  • the content of the organic component in the inorganic fiber sheet is preferably 1.0 to 15.0% by mass, more preferably 2.0 to 12.5% by mass, based on the total amount of the inorganic fiber sheet, Particularly preferably, it is 5.4 to 10.1% by mass.
  • the content of organic components in the inorganic fiber sheet is measured by a method conforming to JIS-P8252. More specifically, it is as follows. A sample weight of 2 g is placed in a crucible and dried at 120° C./10 min before weight measurement. After that, it is burned in an electric furnace at 900° C. for 30 minutes to be incinerated. The weight reduction rate is calculated from the weight of the combustion residue and the weight after drying.
  • the inorganic fiber sheet can be produced by wet papermaking, preferably using an inclined paper machine.
  • a specific method of manufacturing an inorganic fiber sheet using the inclined paper machine shown in FIG. 1 will be described.
  • a papermaking raw material liquid containing a dispersion medium and inorganic fibers is guided into the headbox.
  • the raw papermaking liquid is supplied to the head box while controlling the supply amount of the raw papermaking liquid by a pump (not shown) to form a pool of the raw papermaking liquid.
  • the papermaking raw material liquid is caused to convect by a water flow generator provided in a pool (water pool) of the papermaking raw material liquid.
  • the raw material liquid for papermaking in the pool comes into contact with the forming wire running diagonally upward, and the solid content (inorganic fibers) is deposited on the raw material liquid for papermaking by dewatering (the dispersion medium is sucked) from below the forming wire. Then, an inorganic fiber sheet in a wet paper state is formed. As shown in FIG. 1, by providing a plurality of legs (No. 1 leg, No. 2 leg, etc.) during dehydration, the dehydration start position can be controlled. Finally, the inorganic fiber sheet in the wet paper state is passed through a drying device (such as a drying dryer) to obtain a base paper for the inorganic fiber sheet. The base paper for the inorganic fiber sheet may be wound into a roll if necessary. The inorganic fiber sheet may be appropriately cut into a desired size.
  • a drying device such as a drying dryer
  • the following operation may be performed. (1) “1-Y/X” can be reduced by moving the dehydration start position closer to the raw material input opening. (2) “1-Y/X” can be reduced by increasing the blowing pressure of the water flow generating mechanism (increasing the flow velocity of the water flow).
  • the inorganic fiber sheet was measured for shot content, calculated for "1-Y/X", and measured for organic content (Igloss A (%)) according to the methods described above. Furthermore, the processability, flame retardancy, bending suitability, and wet strength (wire peeling resistance) of the inorganic fiber sheet were measured according to the methods described below. Table 2 shows the measurement results.
  • ⁇ Flame Retardant>> A sample weight of 2 g is placed in an electric furnace at each specified temperature and burned for 5 minutes to be incinerated. Record the temperature range in which the sample ignites after it is placed in the electric furnace until it is ashed. ⁇ : Does not ignite up to 900°C, or does not ignite ⁇ : Ignites at 700°C ⁇ : Ignites at 500°C

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Textile Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Nonwoven Fabrics (AREA)
PCT/JP2022/012590 2021-03-29 2022-03-18 無機繊維シート Ceased WO2022210020A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2023510976A JP7854427B2 (ja) 2021-03-29 2022-03-18 無機繊維シート
EP22780235.2A EP4317579B1 (en) 2021-03-29 2022-03-18 Inorganic fiber sheet
US18/552,787 US12540437B2 (en) 2021-03-29 2022-03-18 Inorganic fiber sheet with shots distributed on the side surface
CN202280013863.5A CN116848301B (zh) 2021-03-29 2022-03-18 无机纤维片

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021056181 2021-03-29
JP2021-056181 2021-03-29

Publications (1)

Publication Number Publication Date
WO2022210020A1 true WO2022210020A1 (ja) 2022-10-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/012590 Ceased WO2022210020A1 (ja) 2021-03-29 2022-03-18 無機繊維シート

Country Status (6)

Country Link
US (1) US12540437B2 (https=)
EP (1) EP4317579B1 (https=)
JP (1) JP7854427B2 (https=)
CN (1) CN116848301B (https=)
TW (1) TWI840774B (https=)
WO (1) WO2022210020A1 (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240175210A1 (en) * 2021-03-29 2024-05-30 Tomoegawa Co., Ltd. Inorganic fiber sheet

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JPH10317298A (ja) * 1997-05-15 1998-12-02 Tanaka Seishi Kogyo Kk 無機繊維質ペーパー
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EP4317579A4 (en) 2025-03-26
EP4317579B1 (en) 2025-12-03
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EP4317579A1 (en) 2024-02-07
EP4317579C0 (en) 2025-12-03
US12540437B2 (en) 2026-02-03
CN116848301B (zh) 2025-10-03
US20240175210A1 (en) 2024-05-30
TWI840774B (zh) 2024-05-01
TW202300746A (zh) 2023-01-01
JPWO2022210020A1 (https=) 2022-10-06

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