WO2013091184A1 - 针刺无纺布、其制造方法和由该无纺布形成的过滤器和吸音材料 - Google Patents

针刺无纺布、其制造方法和由该无纺布形成的过滤器和吸音材料 Download PDF

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Publication number
WO2013091184A1
WO2013091184A1 PCT/CN2011/084323 CN2011084323W WO2013091184A1 WO 2013091184 A1 WO2013091184 A1 WO 2013091184A1 CN 2011084323 W CN2011084323 W CN 2011084323W WO 2013091184 A1 WO2013091184 A1 WO 2013091184A1
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WO
WIPO (PCT)
Prior art keywords
nonwoven fabric
fabric
short fibers
needle
fibers
Prior art date
Application number
PCT/CN2011/084323
Other languages
English (en)
French (fr)
Inventor
吴莹旭
Original Assignee
Ng Ying Yuk
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 Ng Ying Yuk filed Critical Ng Ying Yuk
Priority to EP11877968.5A priority Critical patent/EP2796603A4/en
Priority to PCT/CN2011/084323 priority patent/WO2013091184A1/zh
Priority to US14/366,651 priority patent/US20150218740A1/en
Priority to CN201180075446.5A priority patent/CN104204324B/zh
Priority to CN201280010826.5A priority patent/CN103561835B/zh
Priority to EP12752446.0A priority patent/EP2682171B1/en
Priority to PL12752446T priority patent/PL2682171T3/pl
Priority to ES12752446.0T priority patent/ES2692883T3/es
Priority to TR2018/15906T priority patent/TR201815906T4/tr
Priority to US14/001,997 priority patent/US10246805B2/en
Priority to PCT/CN2012/071506 priority patent/WO2012116612A1/zh
Publication of WO2013091184A1 publication Critical patent/WO2013091184A1/zh
Priority to HK15104142.2A priority patent/HK1203575A1/zh
Priority to HK15104141.3A priority patent/HK1203574A1/zh

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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
    • D04H1/04—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial fibres
    • D04H1/08—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial fibres and hardened by felting; Felts or felted products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/12—Filter presses, i.e. of the plate or plate and frame type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/12—Filter presses, i.e. of the plate or plate and frame type
    • B01D25/176—Filter presses, i.e. of the plate or plate and frame type attaching the filter element to the filter press plates, e.g. around the central feed hole in the plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/30—Filter housing constructions
    • B01D35/306—Filter mounting adapter
    • 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
    • D04H1/4282—Addition polymers
    • D04H1/4291—Olefin series
    • 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
    • D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/48—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
    • D04H1/485—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation in combination with weld-bonding
    • 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
    • D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/48—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
    • D04H1/49—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation entanglement by fluid jet in combination with another consolidation means
    • 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
    • D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
    • 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
    • D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/558—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 by welding together the fibres, e.g. by partially melting or dissolving in combination with mechanical or physical treatments other than embossing
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/50—FELT FABRIC
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/50—FELT FABRIC
    • Y10T442/56—From synthetic organic fiber

Definitions

  • the present invention relates to a nonwoven fabric, a method for producing the same, and a filter formed of the nonwoven fabric as a material for manufacturing a filter element, and the use as a sound absorbing material, the nonwoven fabric having good hardness, stiffness, and moldability Formability and compressive strength.
  • Non-woven fabrics also known as non-woven fabrics, non-woven fabrics, are fabrics that do not require spinning fabrics. They have good filterability, breathability and adsorptivity, and are very suitable as filter elements for filters.
  • the existing felt nonwovens are generally soft in texture and cannot be pleated. Therefore, the existing needle-punched nonwoven fabric cannot be used as a pleated filter to increase the filtration area. Moreover, the conventional needle-punched nonwoven fabric does not have moldability, i.e., cannot be molded into various shapes by molding, or cannot be maintained after molding.
  • the low-melting point fiber layer is a cured material, in particular, has a property of being solidified after being heated and melted, so that the nonwoven fabric thus formed can be self-supporting and have form retention.
  • the nonwoven fabric has a hardness sufficient to enable the nonwoven fabric to be self-supporting and has form retention, and the nonwoven fabric has moldability. It has excellent hardness or stiffness or stiffness, excellent formability, and high compressive strength.
  • the needle-punched nonwoven fabric is formed into a corrugated shape and can be used for a wrinkle-shaped filter to increase the filtration area without any supporting frame.
  • the needle-punched nonwoven fabric of the above-mentioned PCT International Patent Application requires the use of two short fibers of different melting points, requiring a large amount of materials and a relatively complicated manufacturing process and a high cost.
  • a sound absorbing material is provided on the surface to reduce the generation of echo.
  • the sound absorbing material is a loose porous gas permeable material such as fiberglass cotton, rock wool, sponge and foam, and the like.
  • glass fiber is harmful to the human body and the environment, and is easily weathered, resulting in a decrease in sound absorbing performance and a short service life.
  • An object of the present invention is to provide a nonwoven fabric which is easy to manufacture and low in cost, overcomes the disadvantages of the prior art, and still maintains good hardness, rigidity, stiffness and formability, and has high compressive strength. It is sufficient for molding parts such as self-supporting filter elements in various forms.
  • Another object of the present invention is to provide a method for producing the above nonwoven fabric and a filter formed of the nonwoven fabric.
  • the present invention provides a nonwoven fabric which is made of a single short fiber or a different kind of short fiber having the same or close melting point, preferably a short one of a single melting point. Made of fiber.
  • the hardness of the nonwoven fabric is still sufficient to enable the nonwoven fabric to be self-supporting and have form retention, and the nonwoven fabric has moldability.
  • short fibers of various melting points can be applied to the present invention, for example, polyester, polyester, polypropylene, nylon, acrylic, nylon, viscose, acrylic, acrylic, and polyvinyl chloride.
  • the working temperature of the product made of the nonwoven fabric is usually room temperature (25 ° C) or as high as tens of degrees Celsius or even 100 ° C, the nonwoven fabric is used for manufacturing.
  • the melting point of the short fibers usually needs to be 80 ° C or higher.
  • the staple fiber is polypropylene (abbreviated as PP) having a melting point of about 130 °C.
  • Polypropylene is a crystalline polymer. Although its various crystalline forms have a melting point of about 150 ° C to 176 ° C, the actual short fiber product may be, for example, a randomly copolymerized polypropylene having a slightly lower melting point. It is about 130 ° C.
  • the nonwoven fabric is obtained in the following manner: after the short fibers are formed into a fabric, the fabric is heat-treated at a temperature higher than a melting point of the short fibers for a short time to melt a portion of the short fibers into a melt. The state is entangled with the remaining unmelted portion of the short fibers, which are then formed by rapid cooling.
  • the remaining steps can be substantially the same as the manufacturing steps in PCT/CN2011/071371 above.
  • the heat treatment temperature is, for example, 130 ° C - 160 ° C, or 180 ° C - 200 ° C
  • the short time heat treatment is to control the residence time of the fabric in the oven, for example.
  • the fabric is passed through an oven at the heat treatment temperature at a speed of about 4 to 5 meters per minute, for example, at a speed of about 30 seconds per square meter of the fabric, thereby melting a portion of the staple fibers in the fabric, melting Part of the proportion It is 30-80%, preferably 60-70% of the grey fabric; then the grey fabric is rapidly cooled to cure and harden into a single-melting nonwoven fabric.
  • the nonwoven fabric When the single-melting-point nonwoven fabric is molded into various shapes, the nonwoven fabric may be slightly heated at a temperature lower than the melting point of the short fibers, for example, 100 ° C for polypropylene, to soften it, It does not melt, so that it can be easily molded to obtain the desired shape.
  • a temperature lower than the melting point of the short fibers for example, 100 ° C for polypropylene
  • the nonwoven fabric may be a nonwoven fabric obtained by pinning or leeches.
  • the nonwoven fabric of the present invention is particularly suitable for use as a filter element for gas-solid and liquid-solid separation filters. Accordingly, the present invention also provides a filter using the nonwoven fabric of the present invention as a material for a filter element for manufacturing the filter, the filter element being self-supporting without using any support structure.
  • the invention also provides a method for manufacturing a needle-punched nonwoven fabric, comprising the following steps:
  • the short fibers may be polypropylene having a melting point of about 130 ° C or 150 ° C to 176 ° C, and the heat treatment temperature is, for example, 130 ° C to 160 ° C, or 180 ° C, respectively. -200 ° C.
  • the fabric is subjected to a heat treatment such that the fabric is passed through the oven at the heat treatment temperature at a speed, for example, about 4 to 5 meters per minute. That is, the fabric is heated at a speed of about 30 seconds per square meter of the fabric, whereby about 30 to 80% by weight, preferably 60 to 70% by weight, of the staple fibers in the fabric are melted.
  • hot air can be blown in the vertical direction to the upper and lower surfaces of the grey cloth, so that the hot air directly penetrates the grey cloth, so that the inner low-melting fiber layer can obtain a better heating effect.
  • a 200 kg weight cooling roll may be pressed down on the fabric in its own weight or by oil pressure to rapidly cool the cloth.
  • the sizing treatment comprises forming a grey fabric by a process step selected from the group consisting of acupuncture, leeches, heat sealing, thermal bonding, pulp airlaid, wet or stitching.
  • the nonwoven fabric of the present invention may have a Shore A hardness of up to 50-80 degrees.
  • the nonwoven fabric has a basis weight in the range of 250 to 3000 g/m 2 .
  • the hardness of the nonwoven fabric of the present invention is comparable to that of the nonwoven fabric made of different short fiber layers of the above-mentioned international patent application PCT/CN2011/071371, which is sufficient for making, for example, self.
  • Support products such as filters, and for example, can be pleated.
  • the present invention uses only one short fiber of melting point, which can significantly reduce material cost and manufacturing cost and save manufacturing time. detailed description
  • the present invention is an improvement of the technical solution in the PCT International Patent Application No. PCT/CN2011/071371, the entire entire entire entire content of which is hereby incorporated by reference. Where the options are different, the rest may not be specifically referred to in the PCT/CN2011/071371.
  • the present invention relates to a nonwoven fabric produced by a short fiber by a method such as a needle punch method, which has excellent hardness or firmness; it also exhibits very good moldability, and is molded into any shape or structure. Thereafter, the shape or configuration can be maintained.
  • the nonwoven fabric produced by the needle punch method is called Needle punched felt, and the felt (Felt) is usually a sheet-like structure which is tightly bonded by, for example, wool or pile fibers.
  • the method for producing a nonwoven fabric of the present invention comprises a pretreatment step of producing a grey fabric and a post-treatment step of treating the grey fabric.
  • the pre-processing step includes the following steps. First, the cotton-like short fiber material is put into a carding machine, and then laid into a web-like planar layer in a laying machine.
  • the fiber layer may contain only a single-melting short fiber uniformly mixed, or uniformly mixed. The same type or different types of short fibers having the same or close melting point.
  • the fibrous layer of the reticulated plane is then treated by a process such as a needle punch.
  • the fiber material after the needle punch has been formed into a nonwoven fabric, which is then taken up in rolls.
  • the post-processing step comprises the steps of: placing the grey fabric into an oven, heat-treating the grey fabric at a temperature higher than the melting point of the short fibers, controlling the residence time of the blank in the oven, and making a part of the short fiber layer Short fibers melt.
  • the key to producing the single-melt needle-punched nonwoven fabric of the present invention is a heat-treating step which causes a portion of the fabric to be in a molten state during the heat treatment, and another portion of the fabric to remain in an unmelted state, so that after the heat treatment, the melt is short.
  • the fibers become molten and entangled with the remaining unmelted short fibers such that the structure of the fabric becomes molten fibers sandwiched between the unmelted fibers.
  • the heat-treated woven fabric is subjected to a cooling treatment to cure the melted portion of the short fibers to obtain the nonwoven fabric of the present invention.
  • the staple fiber used is polypropylene having a melting point of about 130 ° C or 150 ° C to At 176 ° C, the heat treatment temperature may be about 130 ° C - 160 ° C, or 180 ° C - 200 ° C, respectively, and the cooling temperature may be about 10-15 ° C.
  • the fabric is passed through the oven at the heat treatment temperature at a speed of about 4 to 5 meters per minute, that is, the fabric is heated at a speed of about 30 seconds per square meter of the fabric, thereby making the fabric 30 - 80% by weight, preferably 60 to 70% by weight, of the short fibers are melted, and 20 to 70% by weight, preferably 30 to 40% by weight, of the short fibers remain in an unmelted state.
  • the residence time of the grey fabric in the oven can be adjusted depending on the basis weight of the grey fabric and the desired hardness.
  • the heat treatment it is preferable to blow the upper and lower surfaces of the fabric perpendicularly by hot air so that the hot air can directly penetrate the fabric and heat the inner fiber layer. It is preferable to cool the fabric in a rapid manner.
  • a cooling roller of, for example, 200 kg may be pressed down on the fabric in a self-weight manner, or oil may be used when the basis weight of the nonwoven fabric is large.
  • the chill roll is pressed down onto the grey fabric in a pressing manner to make the cooling faster, for example, cooling the nonwoven fabric from about 150 ° C to about 15 ° in about 5-15 seconds. C, the obtained nonwoven fabric is made denser.
  • the nonwoven fabric of the present invention can be pleated to form a corrugated nonwoven fabric.
  • additives such as a nucleating agent, a matting agent, a pigment, an antibacterial agent, a flame retardant, and a hydrophilic agent may be added to the nonwoven fabric of the present invention to further enhance the performance or to satisfy a specific use. It is also possible to use a device such as an embossing roll to print a pattern on the nonwoven fabric product of the present invention.
  • a PTFE film polytetrafluoroethylene film
  • an acrylic coating may be applied to the surface of the needle-punched nonwoven fabric of the present invention to increase the smoothness of the nonwoven fabric. This facilitates dust detachment and cleaning attached to the filter cartridge.
  • the nonwoven fabric of the present invention obtained by the above-mentioned production method can have a Shore A hardness of 50 to 80 degrees as measured by a Shore A durometer, and is sufficient to support its own weight or to perform pleating or the like.
  • the needle-punched nonwoven fabric of the present invention Since the needle-punched nonwoven fabric of the present invention has good filterability, gas permeability, light weight, high hardness, high strength, easy molding, shape retention and pleating treatment, it is particularly suitable for use. Filter media for the filter.
  • the nonwoven fabric of the present invention has been tested to maintain its shape or configuration after compression molding, and has a high hardness, thereby having dimensional stability.
  • the edge of the sewing filter cloth necessary for the conventional filter press can be omitted, the seal ring can be sewn into the groove, and the filter can be inserted into the groove with a hammer.
  • the cloth passes through the center through hole of the support plate and is unfolded, etc., which greatly reduces the labor intensity and reduces the cost of operating, installing and replacing the filter. And the installation of the filter elements on both sides is Independent, so you can replace or process the filter elements on either side at will.
  • the needle-punched nonwoven fabric of the present invention has high-density porosity and good gas permeability, and its sound absorbing effect is very good, so that it can be used as a sound absorbing material.
  • the needle-punched nonwoven fabric of the present invention exhibits good shape stability, is light in weight, can be molded into various shapes, is easy to apply, is harmless to the human body and the environment, and is an excellent environmentally-friendly sound absorbing material.
  • the nonwoven fabric of the present invention can be used to replace the nonwoven fabric made of two different melting point short fibers in the PCT/CN2011/071371, which has substantially the same application range and can be used for basic manufacturing. The same product.
  • the nonwoven fabric of the present invention Since the needle-punched nonwoven fabric of the present invention has the characteristics of light weight, high hardness, high strength, easy molding, and form retention, the nonwoven fabric of the present invention is molded into various filter elements, and can not only retain the same.
  • the molded shape provides sufficient pressure resistance and greatly simplifies the installation and replacement of the filter element, which is more advantageous in reducing labor intensity and operating cost.
  • When used as a sound absorbing material it is easy to apply, sound-absorbing and stable, and harmless to the human body and the environment.
  • the nonwoven fabric having a higher hardness of the present invention and a method for producing the same, and a filter using the nonwoven fabric of the present invention are described above in the preferred embodiment. A person skilled in the art can make various modifications and/or modifications of the invention in accordance with the teachings of the specification. These modifications and/or modifications are intended to be included within the scope of the appended claims.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Filtering Materials (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

本发明提供了一种新颖的针刺无纺布，其由熔点相同或接近的、相同种类或不同种类的短纤维，尤其是一种单熔点短纤维制成，所述无纺布的硬度仍然足以使该无纺布能够自支撑而具有形态保持性，并且可以作打褶处理。所述无纺布还具有良好的可模制成型性和抗压强度。本发明还提供了上述无纺布的制造方法，以及由上述无纺布作为制造过滤元件的材料所形成的过滤器，所述过滤器中的无纺布不需任何支撑框架而保持形态。本发明还提供了上述无纺布作为吸音材料的用途。

Description

针剌无纺布、 其制造方法和由该无纺布形成的过滤器和吸音材料 技术领域
本发明涉及无纺布、 其制造方法和由该无纺布作为制造过滤元件的材料所形成 的过滤器及作为吸音材料的用途， 所述无纺布具有良好的硬度、 挺度、 可模制成型 性和抗压强度。 发明背景
无纺布， 也称为不织布、 非织造布， 是一种不需要纺纱织布而形成的织物， 它 具有良好的过滤性、 透气性和吸附性， 非常适合用作过滤器的过滤元件。
现有的针剌无纺布 (felt)—般质地较软， 不能进行打褶处理。 所以采用现有的针 剌无纺布无法做成褶皱形状的过滤器， 以增大过滤面积。 而且， 现有的针剌无纺布 不具有可模制成型性， 即不能通过模压操作成各种形状， 或者在模压成型后不能够 保持该形状。
因此， 现有技术中还没有公开一种刚度较高以使其能够自支撑而具有形态保持 性和模制成型性， 并且能够打褶的针剌无纺布 (felt); 也没有发现由针剌无纺布 (felt) 做成的褶皱形状过滤器， 其中针剌无纺布可以自支撑而形成过滤器的过滤介质， 不 需使用支撑框架。
申请人于 2011年 2月 28 日提交的 PCT国际专利申请 PCT/CN2011/071371公 开了一种无纺布及其制造方法以及由该无纺布形成的过滤器， 所述无纺布由包括低 熔点短纤维和高熔点短纤维的至少两种短纤维制成。 该发明的特征在于， 所述低熔 点纤维层是固化的材料， 尤其是具有在被加热熔融之后可以固化的性质， 以致于由 此形成的无纺布能够自支撑而具有形态保持性。 所述无纺布的硬度足以使该无纺布 能够自支撑而具有形态保持性， 并且所述无纺布具有可模制成型性。 它具有优异的 硬度或刚度或坚挺度， 卓越的成型性， 并且抗压强度非常高。 此外， 所述针剌无纺 布制造成皱褶形状，可用于皱褶形状的过滤器以增大过滤面积，不需任何支撑框架。
但是上述 PCT 国际专利申请中的针剌无纺布需要采用两种不同熔点的短纤维 来制造， 所需的材料较多且制造过程相对复杂， 成本较高。
众所周知， 声音在室内空间往往会产生回音，例如硬的墙壁和广阔的空间 (如礼 堂、 教室、 体育场、 电影院等等)都会因回音较大而产生反射噪音， 以致于声音不 断地重叠或混淆不清。 要消除这种现象以便让声音更加清晰， 需要在墙面或天花板 表面设置吸音材料以降低回音的产生。 吸音材料为疏松多孔的透气性材料， 例如 玻璃纤维棉、 岩棉、 海棉和泡沫等等。 但玻璃纤维对人体和环境有害， 容易风化， 导致吸音性能下降和使用寿命短。 岩棉和海绵的吸音性能低， 容易变形， 易燃， 燃 烧时放出有毒气体。 因此， 有需要提供一种具有吸音性能高、 阻燃、 形态稳定、 重 量轻等特点的吸音材料。 发明内容
本发明的一个目的是提供一种无纺布， 它易于制造且成本较低， 以克服现有技 术的缺点， 并且仍然保持良好的硬度、 刚度、 坚挺度和成型性， 且抗压强度较高， 足以用于模制成各种形态的自支撑过滤元件等部件。
本发明的另一个目的是提供上述无纺布的制造方法和由该无纺布形成的过滤 器。
为了实现上述目的， 本发明提供了一种无纺布， 所述无纺布由熔点相同或接近 的单独一种短纤维或者不同种类的短纤维制成，较佳地由单熔点的一种短纤维制成。 所述无纺布的硬度仍然足以使该无纺布能够自支撑而具有形态保持性， 并且所述无 纺布具有可模制成型性。
理论上来说， 各种熔点的短纤维都可以适用于本发明， 例如， 聚酯、 涤纶、 丙 纶、 尼龙、 亚克力、 锦纶、 粘胶纤维、 腈纶、 乙纶和氯纶。 但在实践中， 由于所述 无纺布所制成的产品 (如过滤器)的工作温度通常为室温 (25 °C)或者高达几十摄氏度 甚至 100°C，用于制造所述无纺布的短纤维的熔点通常需要在 80°C或者 100°C以上。
优选地， 所述短纤维是聚丙烯 (polypropylene, 简称 PP)， 其熔点是约 130°C。 聚丙烯是一种结晶聚合物，虽然其各种晶型的熔点约为 150°C至 176°C，但实际的短 纤维产品可以是例如无规共聚的聚丙烯， 其熔点略低一些， 可以为约 130°C。
优选地， 所述无纺布按照以下方式得到： 在所述短纤维形成坯布后， 将所述坯 布在高于所述短纤维熔点的温度下进行短时间的热处理， 使一部分短纤维熔化为熔 融状态而缠结着其余未熔融的那部分短纤维， 然后经过快速冷却而形成。 其余的步 骤可以与上述 PCT/CN2011/071371中的制造步骤基本相同。
对于聚丙烯构成的短纤维， 所述热处理温度分别是例如 130°C-160°C， 或者是 180°C-200°C , 所述短时间的热处理是控制坯布在烘箱中的停留时间， 例如使坯布以 约 4-5米 /分钟的速度穿过处于所述热处理温度的烘箱， 例如以约 30秒 /平方米坯布 的速度来加热坯布， 由此使坯布中的一部分短纤维熔化， 熔化的部分所占的比例约 为坯布的 30-80%， 优选地为 60-70%; 然后坯布被快速冷却， 使其固化硬化成为单 熔点无纺布。
当在将所述单熔点无纺布模制为各种形状时， 可以在低于短纤维熔点的温度下 稍为加热所述无纺布， 例如用于聚丙烯的 100°C， 使其软化、 但不会熔化， 以便易 于模制得到所需的形状。
所述无纺布可以是通过针剌或水剌定型获得的无纺布。
本发明的无纺布特别适合用作气一固和液一固分离过滤器的过滤元件。 因此， 本发明还提供了一种过滤器， 采用本发明的无纺布作为制造该过滤器的过滤元件的 材料， 所述过滤元件是自支撑的， 无需使用任何支撑结构。
本发明还提供了一种针剌无纺布的制造方法， 包括下列步骤：
1)将棉花状的熔点相同或接近的相同种类或者不同种类的短纤维放入混棉箱中 使其混合均匀以制成层状纤维层， 所述短纤维可以是单独一种短纤维；
2)将混合后的纤维输送到梳理机中梳平；
3)将梳平之后的纤维再送到铺网机中使其铺呈成网状平面；
4)将网状平面的纤维送入成型机中进行定型处理， 制成坯布；
5)在高于所述短纤维熔点的温度下对所述坯布进行短时间的热处理， 使一部分 所述短纤维熔化， 所述熔化的短纤维变成熔融状态而缠结着未熔化的另一部分短纤 维， 其中熔化的部分纤维所占的比例约为坯布的 30-80%， 优选地为 60-70%;
6)冷却所述热处理后的坯布， 使熔化的短纤维固化， 得到所述无纺布。
如上所述， 所述短纤维可以是聚丙烯， 其熔点为约 130°C或 150°C至 176°C， 所 述热处理的温度分别是例如 130°C-160°C， 或者是 180°C-200°C。 为了达到一部分纤 维熔化缠绕着保持未熔融状态的另一部分纤维， 需要对坯布作如下热处理： 使坯布 以一定的速度， 例如约 4-5米 /分钟的速度穿过处于所述热处理温度的烘箱， 即以约 30秒 /平方米坯布的速度来加热坯布， 由此使坯布中的约 30-80(重量)％， 优选地为 60-70(重量)％的短纤维熔化。
在所述热处理过程中， 可以采用热风以垂直方向吹向坯布的上下表面， 使热风 直接穿透坯布， 使内部的低熔点纤维层获得更好的加热效果。
在所述冷却过程中， 可以将例如 200kg重的冷却辊以自重形式或者通过油压方 式向下压在坯布上， 对所述坯布进行快速冷却。
在上述方法的步骤 4)中， 所述定型处理包括采用选自针剌、 水剌、 热合、 热粘 合、 浆粕气流成网、 湿法或缝编的工艺步骤来形成坯布。 本发明的无纺布的邵氏 A硬度可以高达 50-80度。 所述无纺布的克重在 250至 3000g/m2范围内。
经测试发现， 本发明的无纺布的硬度与上述国际专利申请 PCT/CN2011/071371 中采用高低熔点的不同短纤维层所制成的无纺布的硬度相若， 足以用于制成例如自 支撑过滤器等产品， 以及例如可以打褶。 与上述现有技术相比， 本发明只采用一个 熔点的短纤维， 可以明显降低材料成本和制造成本以及节省制造时间。 具体实施方式
本发明是对同一申请人的 PCT国际专利申请 PCT/CN2011/071371 中的技术方 案的改进， 该国际专利申请的全部内容在此引入作为参考， 以下的内容主要针对与 所述 PCT/CN2011/071371中的方案不同的地方，其余没有专门指出的内容可以参照 所述 PCT/CN2011/071371。
本发明涉及由短纤维通过例如针剌法等方法制成的无纺布， 它具有优异的硬度 或坚挺度； 它还表现出非常好的模制成型性， 在被模压成任何形状或构造之后， 能 够保持该形状或构造。 用针剌法制成的无纺布称为针剌呢 （Needle punched felt), 而呢或毡 （Felt) 通常是用例如羊毛或毛绒纤维紧密结合而成的片状结构物。
一般来说， 本发明的无纺布的制造方法包括制作坯布的前处理步骤和处理坯布 的后处理步骤。
所述前处理步骤包括以下步骤。 首先， 将棉花状的短纤维材料放入梳理机中梳 理， 之后在铺网机铺呈成网状平面层， 所述纤维层可以只含有均匀混合的一种单熔 点短纤维， 或者是均匀混合的、 熔点相同或接近的相同种类或不同种类的短纤维。 然后将网状平面的纤维层经过例如针剌等工艺处理。 针剌之后的纤维原料已成型为 无纺坯布， 然后将其成卷备用。
所述后处理步骤包括以下步骤： 将坯布放入烘箱， 以高于所述短纤维熔点的温 度对所述坯布进行热处理， 控制坯在烘箱中的停留时间， 使所述短纤维层中的一部 分短纤维熔化。 制造本发明的单熔点针剌无纺布的关键在于热处理步骤， 该步骤要 使得在热处理过程中一部分坯布变成熔融状态， 而另一部分坯布保持未熔融状态， 以致于在热处理后， 熔化的短纤维变成熔融状态而缠结着其余的未熔融的短纤维， 这样所述坯布的结构变成熔化的纤维夹在未熔化的纤维之间。 之后将热处理后的坯 布进行冷却处理， 将所述熔化的那一部分短纤维固化， 从而得到本发明的无纺布。
在一优选实施例中， 采用的短纤维是聚丙烯， 其熔点在约 130°C或者 150°C至 176°C， 这时所述热处理温度可以分别为约 130°C-160°C， 或者 180°C-200°C， 所述 冷却温度可以为约 10-15 °C。 在热处理聚丙烯坯布时， 使坯布以约 4-5米 /分钟的速 度穿过处于所述热处理温度的烘箱， 即以约 30秒 /平方米坯布的速度来加热坯布， 由此使坯布中 30-80(重量)％， 优选地为 60-70(重量)％的短纤维熔化， 而 20-70(重 量)％，优选地为 30-40(重量)％的短纤维保持未熔融状态。本领域技术人员应当明白， 坯布在烘箱的停留时间视乎该坯布的克重和要求获得的硬度是可以作出调整的。
进行热处理时， 优选地采用热风垂直地吹向坯布的上下表面， 使热风可以直接 穿透坯布， 对内部的纤维层进行加热。 冷却处理所述坯布最好要快速， 例如在冷却 所述坯布时， 可以将例如 200kg重的冷却辊以自重方式向下压在坯布上， 或者当无 纺布的克重较大时可采用油压方式将冷却辊向下压在坯布上，以使冷却的速度更快， 例如在约 5-15秒的时间内就可以使所述无纺布从约例如约 150°C冷却到约 15 °C，使 所制得的无纺布更致密。
之后根据需要， 例如， 如果期望形成用于皱褶过滤器的过滤元件， 可以将本发 明的无纺布进行打褶处理， 形成波纹状的无纺布。
另外， 在本发明的无纺布中可以加入晶核剂、 消光剂、 颜料、 抗菌剂、 阻燃剂、 亲水剂等添加剂， 以进一步增强性能或满足特定的用途。 还可以利用如压花辊等装 置， 在本发明的无纺布产品上印上图案。
作为一种选择， 可以在本发明的针剌无纺布表面上施加 PTFE膜 (聚四氟乙烯膜) 或者丙烯酸涂层， 以增大无纺布的光滑度。 这样有利于附着在过滤筒体上的粉尘脱 落和清洁。
通过 A型邵氏硬度计来测量，根据上述制造方法获得的本发明无纺布的邵氏 A 硬度可以高达 50-80度， 足以支撑自身的重量或者进行打褶等处理。
用于形成坯布的工艺步骤， 例如针剌、 水剌、 热粘合、 气流成网、 湿法或缝编 等工艺步骤， 它们本身是已知的， 这里不再赘述。
由于本发明的针剌无纺布具有良好的过滤性、 透气性、 重量轻、 硬度高、 强度 高、 易于模制成型、 形态保持性和能够作打褶处理等特点， 所以特别适合用来制作 过滤器的过滤介质。 经过测试， 本发明的无纺布在模压成型后能够保持其形状或构 造， 并且具有较高的硬度， 由此具有尺寸稳定性。 当用本发明的无纺布模压成型为 各种压滤机的过滤元件时， 可以省去了常规压滤机所必需的缝制滤布边缘、 缝入密 封圈并用锤子嵌入凹槽、 将滤布穿过支承板的中心通孔再展开等等操件， 大大降低 了劳动强度和减少了操作、 安装和更换过滤器的成本。 而且两侧过滤元件的安装是 独立的， 所以可随意更换或处理任一侧的过滤元件。
如上述所讨论， 本发明的针剌无纺布具有高密度多孔性和良好的透气性， 其吸 音效果非常好， 因此可以用作吸音材料。 本发明的针剌无纺布表现出良好的形态稳 定性， 重量轻， 可以模制成各种形状， 容易施工， 对人体和环境无害无污染， 是一 种极好的环保吸音材料。
总的来说，本发明的无纺布可以用于替换所述 PCT/CN2011/071371中由两种不 同熔点的短纤维制成的无纺布， 具有基本相同的应用范围， 可以用于制造基本相同 的产品。
由于本发明的针剌无纺布具有重量轻、 硬度高、 强度高、 易于成型和形态保持 性等特点， 所以用本发明的无纺布模压成型为各种形成的过滤元件， 不但能够保持 其模制形状，提供足够的抗压能力，而且大大地简化了过滤元件的安装和更换操作， 更有利于减轻劳动强度和节省操作成本。 当用作吸音材料时， 易于施工， 吸音性能 稳定， 对人体和环境无害。 以上以优选实施例介绍了本发明的具有较高硬度的无纺布及其制造方法， 以及 使用本发明无纺布的过滤器。 本领域技术人员可以按照说明书中的教导对本发明进 行各种改进和 /修改， 这些改进和 /或修改都应当被包括在本发明权利要求书的范围 中。

Claims

权利要求书
1 . 一种针剌无纺布， 其特征在于， 所述无纺布由熔点相同或接近的相同种类或 不同种类的短纤维制成， 所述无纺布的硬度足以使该无纺布能够自支撑而具有形态 保持性， 并且所述无纺布具有可模制成型性。
2. 根据权利要求 1的针剌无纺布， 特征在于， 所述无纺布按照以下方式得到： 在所述短纤维形成坯布后， 将所述坯布在高于所述短纤维的熔点的温度下进行热处 理， 使得一部分所述短短纤维熔化为熔融状态而缠结着其余未熔融的短纤维， 然后 经过快速冷却所形成的。
3. 根据权利要求 1或 2的针剌无纺布， 特征在于， 所述无纺布由一种单熔点短 纤维制成。
4. 根据权利要求 3的针剌无纺布， 特征在于， 所述短纤维是熔点是约 130°C或 150°C-176°C的聚丙烯。
5. 根据权利要求 1的针剌无纺布， 特征在于， 在热处理时被熔化的部分在所述 短纤维中所占的比例是 30%-80%， 优选地为 60-70%。
6.根据权利要求 1的针剌无纺布，特征在于，所述无纺布的邵氏 A硬度为 50-80 度。
7.根据权利要求 1的针剌无纺布，特征在于，所述无纺布的克重在 250至 3000 g/m2范围内。
8. 根据权利要求 1的针剌无纺布， 特征在于， 所述无纺布是能够打褶的。
9. 根据权利要求 1或 2的针剌无纺布， 特征在于， 所述短纤维是聚酯、 涤纶、 丙纶、 尼龙、 亚克力、 锦纶、 粘胶纤维、 腈纶、 乙纶或氯纶。
10. 一种过滤器， 特征在于， 采用根据权利要求 1-9之一的针剌无纺布作为制 造所述过滤器的过滤元件的材料。
11. 根据权利要求 1-9之一的针剌无纺布作为吸音材料的用途。
12. 一种制造权利要求 1-9之一的针剌无纺布的方法， 包括下列步骤：
1)将棉花状的熔点相同或接近的相同种类或不同种类的短纤维放入混棉箱中混 合均匀以制成单层或多层纤维；
2)将混合后的纤维输送到梳理机中梳平；
3)将梳平之后的纤维再送到铺网机中使其铺呈成网状平面；
4)将网状平面的纤维送入成型机中进行定型处理， 制成坯布； 其特征在于还包括以下步骤：
5)在高于所述短纤维的熔点的温度下对所述坯布进行热处理， 使一部分所述短 纤维熔化， 所述熔化的短纤维变成熔融状态而缠结着未熔化的另一部分短纤维；
6)冷却所述热处理后的坯布， 使所述熔化的短纤维固化， 得到所述无纺布。
13. 根据权利要求 12的制造方法， 特征在于， 步骤 1)中采用一种单熔点短纤 维。
14. 根据权利要求 13的制造方法， 特征在于， 所述短纤维是聚丙烯， 其熔点为 约 130°C或 150°C-176°C， 所述热处理的温度分别为 130°C-160°C或者 180°C-200°C， 所述冷却的温度为 10°C-18°C ;
所述热处理是使坯布以约 4-5米 /分钟的速度穿过处于所述热处理温度的烘箱， 即以约 30秒 /平方米坯布的速度来加热坯布， 由此使坯布中 30-80(重量)％， 优选地 为 60-70(重量)％的短纤维熔化， 而 20-70(重量)％， 优选地为 30-40(重量)％的短纤维 保持未熔融状态。
15.根据权利要求 12的制造方法，特征在于热风以垂直方向吹向坯布的上下表 面， 使热风直接穿透坯布， 对内部的低熔点纤维层进行加热。
16.根据权利要求 12的制造方法，特征在于采用冷却辊以自重形式或者通过油 压方式将冷却辊向下压在坯布上， 对所述坯布进行快速冷却。
17. 根据权利要求 12的制造方法， 特征在于将所述无纺布进行打褶处理， 形成 褶皱状的无纺布。
18. 根据权利要求 12的制造方法， 特征在于在步骤 4)中， 所述定型处理包括 采用选自针剌、 水剌、 热合、 热粘合、 浆粕气流成网、 湿法或缝编的工艺步骤来形 成坯布。
PCT/CN2011/084323 2011-02-28 2011-12-21 针刺无纺布、其制造方法和由该无纺布形成的过滤器和吸音材料 WO2013091184A1 (zh)

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EP11877968.5A EP2796603A4 (en) 2011-12-21 2011-12-21 NEEDLE-CARBURIZED NONWOVER, MANUFACTURING METHOD AND FILTER AND SOUND SUBSTANCE MANUFACTURED THEREFROM
PCT/CN2011/084323 WO2013091184A1 (zh) 2011-12-21 2011-12-21 针刺无纺布、其制造方法和由该无纺布形成的过滤器和吸音材料
US14/366,651 US20150218740A1 (en) 2011-12-21 2011-12-21 Needle-punched non-woven fabric, manufacturing method thereof and filter and sound absorbing material formed thereby
CN201180075446.5A CN104204324B (zh) 2011-12-21 2011-12-21 针刺无纺布、其制造方法和由该无纺布形成的过滤器和吸音材料
EP12752446.0A EP2682171B1 (en) 2011-02-28 2012-02-23 Connecting member for filtering element of press filter and press filter comprising connecting member
CN201280010826.5A CN103561835B (zh) 2011-02-28 2012-02-23 用于压滤机的过滤元件的连接构件及包括该连接构件的压滤机
PL12752446T PL2682171T3 (pl) 2011-02-28 2012-02-23 Człon łączący dla elementu filtrującego filtra prasy i filtr prasy zawierający człon łączący
ES12752446.0T ES2692883T3 (es) 2011-02-28 2012-02-23 Miembro de conexión para elemento de filtrado de filtro prensa y filtro prensa que comprende un miembro de conexión
TR2018/15906T TR201815906T4 (tr) 2011-02-28 2012-02-23 Baski fi̇ltresi̇ni̇n fi̇ltreleme elemani i̇çi̇n bağlanti elemani ve bağlanti elemanini i̇çeren baski fi̇ltresi̇.
US14/001,997 US10246805B2 (en) 2011-02-28 2012-02-23 Connector assembly for use in filter elements of press filter and press filter comprising the same
PCT/CN2012/071506 WO2012116612A1 (zh) 2011-02-28 2012-02-23 用于压滤机的过滤元件的连接构件及包括该连接构件的压滤机
HK15104142.2A HK1203575A1 (zh) 2011-12-21 2015-04-29 針刺無紡布、其製造方法和由該無紡布形成的過濾器和吸音材料
HK15104141.3A HK1203574A1 (zh) 2011-12-21 2015-04-29 針刺無紡布、其製造方法和由該無紡布形成的過濾器和吸音材料

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