WO2017116976A1 - Thermal insulation filling material and preparation method thereof and thermal insulation product - Google Patents

Thermal insulation filling material and preparation method thereof and thermal insulation product Download PDF

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Publication number
WO2017116976A1
WO2017116976A1 PCT/US2016/068283 US2016068283W WO2017116976A1 WO 2017116976 A1 WO2017116976 A1 WO 2017116976A1 US 2016068283 W US2016068283 W US 2016068283W WO 2017116976 A1 WO2017116976 A1 WO 2017116976A1
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WO
WIPO (PCT)
Prior art keywords
fibre
thermal insulation
filling material
spherical
insulation filling
Prior art date
Application number
PCT/US2016/068283
Other languages
French (fr)
Inventor
Weili HU
Xiaoshuan Fu
Guo Tong ZHAO
Original Assignee
3M Innovative Properties Company
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 3M Innovative Properties Company filed Critical 3M Innovative Properties Company
Priority to CN201680077252.1A priority Critical patent/CN108474154B/en
Priority to US16/064,134 priority patent/US20180371654A1/en
Publication of WO2017116976A1 publication Critical patent/WO2017116976A1/en

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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
    • D04H1/413—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 containing granules other than absorbent substances
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B1/00—Hats; Caps; Hoods
    • A42B1/008—Hats; Caps; Hoods with means for heating or cooling
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B7/00—Footwear with health or hygienic arrangements
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G9/00—Bed-covers; Counterpanes; Travelling rugs; Sleeping rugs; Sleeping bags; Pillows
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G9/00—Bed-covers; Counterpanes; Travelling rugs; Sleeping rugs; Sleeping bags; Pillows
    • A47G9/02—Bed linen; Blankets; Counterpanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/245—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B68—SADDLERY; UPHOLSTERY
    • B68G—METHODS, EQUIPMENT, OR MACHINES FOR USE IN UPHOLSTERING; UPHOLSTERY NOT OTHERWISE PROVIDED FOR
    • B68G1/00—Loose filling materials for upholstery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B68—SADDLERY; UPHOLSTERY
    • B68G—METHODS, EQUIPMENT, OR MACHINES FOR USE IN UPHOLSTERING; UPHOLSTERY NOT OTHERWISE PROVIDED FOR
    • B68G3/00—Treating materials to adapt them specially as upholstery filling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B68—SADDLERY; UPHOLSTERY
    • B68G—METHODS, EQUIPMENT, OR MACHINES FOR USE IN UPHOLSTERING; UPHOLSTERY NOT OTHERWISE PROVIDED FOR
    • B68G7/00—Making upholstery
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
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    • 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
    • D04H1/4326—Condensation or reaction polymers
    • 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
    • D04H1/4326—Condensation or reaction polymers
    • D04H1/435—Polyesters
    • 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
    • D04H1/70—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
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D2400/00—Functions or special features of garments
    • A41D2400/10—Heat retention or warming
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D2500/00—Materials for garments
    • A41D2500/30—Non-woven
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/12—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with fibrous inlays, e.g. made of wool, of cotton
    • A47C27/121—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with fibrous inlays, e.g. made of wool, of cotton with different inlays
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/12—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with fibrous inlays, e.g. made of wool, of cotton
    • A47C27/122—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with fibrous inlays, e.g. made of wool, of cotton with special fibres, such as acrylic thread, coconut, horsehair
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G9/00—Bed-covers; Counterpanes; Travelling rugs; Sleeping rugs; Sleeping bags; Pillows
    • A47G9/02—Bed linen; Blankets; Counterpanes
    • A47G9/0207—Blankets; Duvets
    • A47G9/0223—Blankets
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G9/00—Bed-covers; Counterpanes; Travelling rugs; Sleeping rugs; Sleeping bags; Pillows
    • A47G9/08—Sleeping bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2437/00—Clothing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B68—SADDLERY; UPHOLSTERY
    • B68G—METHODS, EQUIPMENT, OR MACHINES FOR USE IN UPHOLSTERING; UPHOLSTERY NOT OTHERWISE PROVIDED FOR
    • B68G1/00—Loose filling materials for upholstery
    • B68G2001/005—Loose filling materials for upholstery for pillows or duvets
    • 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
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
    • 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
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    • D10B2501/04—Outerwear; Protective garments
    • D10B2501/042—Headwear
    • D—TEXTILES; PAPER
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    • D10B2505/00—Industrial
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    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • 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
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    • 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
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    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2164—Coating or impregnation specified as water repellent

Definitions

  • thermal insulation materials are filled in clothes and bedclothes or the like to improve the thermal insulation property thereof.
  • thermal insulation filling material is a bulk material including fine fibres. These fibres may mutually shift when they are under stress, so that the overall shape of a product may vary as a user flaps or presses, thereby better fitting in with the user's body and improving the use experience.
  • thermal insulation filling material mainly is natural down such as duck down, goose down, etc.
  • the physical structure of natural down endows it with good filling power, compression-resilience property and thermal insulation property, etc.
  • natural down is not stable in source, and thus is limited in yield, high in cost, and uneven in quality.
  • natural down is generally poor in durability, is prone to mildewing and causing an anaphylactic reaction. For these reasons, the application scope of natural down is limited.
  • thermal insulation filling material that can replace natural down.
  • Some fibre companies at home and abroad have successively launched down-like polyester staple fibre series as new-type filling materials.
  • the prior art includes using different-sized polyester staple fibres and mixed materials thereof, for example, US 4588635 and US6329051; down and feather or mixed materials of other natural fibres and polyester staple fibres, for example, US20140206796 and US6329052; mixed materials of crimped polyester staple fibres and low-melting-point fibres, for example, US4992327.
  • thermal insulation filling materials obtained by means of these prior arts are poor in thermal insulation property, filling power, compression-resilience property, wash durability, and blowable processability (i.e., processability by means of blowing), etc. Summary of the Invention
  • the present invention provides a thermal insulation filling material, which is good in wash durability, and has combination properties such as better blowable processability, quick-drying property, compression-resilience property, and thermal insulation property, etc.
  • the thermal insulation filling material of the present invention includes:
  • a water-repellent layer is formed on a surface of the bulk fibre and of the spherical fibre assembly, and
  • a weight ratio of the bulk fibre to the spherical fibre assembly is between about 30:70 and about 70:30.
  • the present invention provides a method for preparing thermal insulation filling material, in which, the foregoing thermal insulation filling material can be obtained by means of simple processes.
  • the method for preparing thermal insulation filling material includes:
  • the thermal insulation product includes:
  • a cladding body configured to define enclosed internal space; and thermal insulation filling material filled in enclosed internal space as defined by the cladding body, wherein the thermal insulation filling material comprises: a bulk fibre; and a spherical fibre assembly, wherein a water-repellent layer is formed on a surface of the bulk fibre and of the spherical fibre assembly, and a weight ratio of the bulk fibre to the spherical fibre assembly is between about 30:70 and about 70:30.
  • FIG. 1 is a photo of thermal insulation filling material in Embodiment 1 of the present invention.
  • FIG. 2 is a comparison chart of test results of thermal insulation property of thermal insulation filling materials in embodiments of the present invention and a comparative example;
  • FIG. 3 is a photo of the washed thermal insulation filling material in Embodiment 1 of the present invention.
  • FIG. 4 is an infrared image of a washed sample package 2 filling the thermal insulation filling material in Embodiment 1 of the present invention
  • FIG. 5 is a photo of the washed thermal insulation filling material in a comparative example 1 of the present invention.
  • FIG. 6 is an infrared image of a washed sample package 2 filling the thermal insulation filling material in the comparative example 1 of the present invention
  • FIG. 7 is a photo of the washed thermal insulation filling material in a comparative example 3 of the present invention.
  • FIG. 8 is an infrared image of a washed sample package 2 filling the thermal insulation filling material in the comparative example 3 of the present invention.
  • FIG. 9 is a comparison chart of test results of thermal resistance retention rate of the thermal insulation filling materials in embodiments and comparative examples.
  • between A and B or “from A to B” includes a value of A, a value of B, and any value that is greater than A and smaller than B.
  • “between 1 and 10” includes, 1, 10 and any value that is greater than 1 and smaller than 10, for example, 2, 3, 4, 5, 6, 7, 8, 9, 2.3, 3.516, 5.26, 7.1 and 9.999, etc.
  • Material dosage or dosage ratio refers to weight or weight ratio unless specifically stated.
  • Weight percentage of A in B refers to percentage of A in B when A belongs to a part of B and weight of B is denoted by 100%.
  • Weight ratio of A to B refers to proportional relationship between weight of A and weight of B when A is different from other constituents of B.
  • Fibre refers to a continuous or discontinuous filament, the dimension of which in the length direction is far greater than that thereof in any direction in a cross section.
  • Binder fibre refers to material consisting of a large number of fine, fluffy and irregular fibres, also referred to as "loose fibre”.
  • Spherical fibre assembly refers to material consisting of a great number of “fibre balls”, and fibre balls are basically spherical materials formed by winding fibres.
  • Denier (D) is a unit of fibre fineness, representing weight in grams of a 9,000-meter-long fibre at the conventional moisture regain.
  • “Clo value” is a parameter for evaluating the thermal insulation property of a material, which in essence is a thermal resistance value, the larger the value is, the better the thermal insulation property is.
  • An embodiment of the present invention provides a thermal insulation filling material, which includes:
  • a water-repellent layer is formed on the surface of the bulk fibre and of the spherical fibre assembly, and
  • a weight ratio of the bulk fibre to the spherical fibre assembly is between about 30:70 and about 70:30.
  • the thermal insulation filling material of the embodiments of the present invention includes a bulk fibre and a spherical fibre assembly in a specific proportion, and a water-repellent layer is formed on the surface of the bulk fibre and of the spherical fibre assembly.
  • the thermal insulation filling material obtained has excellent wash durability, and also has comprehensive performance such as better blowable processability, quick-drying property, compression-resilience property, and thermal insulation property, etc.
  • the weight ratio of the bulk fibre to the spherical fibre assembly is between about 40:60 and about 60:40, more preferably between about 45:55 and about 55:45, and further preferably about 50:50.
  • the weight percentage of the bulk fibre is between 30% and 70%, preferably between 40% and 60%>, more preferably between 45% and 55%, and the most preferably 50%.
  • the weight percentage of the spherical fibre assembly is between 30% and 70%, preferably between 40% and 60%, more preferably between 45% and 55%, and the most preferably 50%.
  • the fibre constituting the bulk fibre has a length between about 15mm and about 75mm, and more preferably has a length between about 28mm and about 51mm.
  • the fibre constituting the bulk fibre has a fineness between about 0.2D and about 15D, and more preferably has a fineness between about 0.5D and about 7D.
  • the fibre constituting the foregoing bulk fibre preferably has a length between 15mm and 75mm and a fineness between 0.2D and 15D, and more preferably has a length between 28mm and 51mm and a fineness between 0.5D and 7D.
  • the fibre constituting the bulk fibre may have a crimp structure or a non-crimp structure.
  • the fibre constituting the spherical fibre assembly has a fineness between about 0.7D and about 15D, and more preferably has a fineness between about 3D and about 7D.
  • the fibre constituting the foregoing spherical fibre assembly preferably has a length between 15mm and 75mm and a fineness between 0.7D and 15D, and more preferably has a length between 28mm and 64mm and a fineness between 3D and 7D.
  • the fibre constituting the spherical fibre assembly has a three-dimensional crimp hollow structure.
  • the fibre for forming the foregoing spherical fibre assembly preferably has a three-dimensional crimp hollow structure, thereby facilitating forming a fibre ball.
  • the spherical fibre assembly has a particle size ranged between about 3mm and about 15mm.
  • the particle size of each fibre ball is preferably between 3mm and 15mm. It should be understood that in the spherical fibre assembly of the same thermal insulation filling material, different fibre balls may have different particle sizes, as long as they are within the foregoing range.
  • fibres in the foregoing bulk fibre and the spherical fibre assembly include but are not limited to one or more of polyester fibre, polyamide fibre, polyvinyl chloride fibre, acrylic fibre and polypropylene fibre.
  • the foregoing fibres are silicone fibres.
  • specifically available silicone fibres include silicone polyester fibres, etc.
  • the fibre constituting the bulk fibre and the fibre constituting the spherical fibre assembly may be the same kind of fibre or different fibres (for example, different chemical constituents, lengths, finenesses and degrees of crimp or the like).
  • the bulk fibre (or the spherical fibre assembly) itself may consist of the same kind of fibre or multiple different fibres.
  • thermal insulation filling material further includes other known constituents or additives, etc.
  • An embodiment of the present invention provides a method for preparing thermal insulation filling material, which includes:
  • the ratio of the weight of the water-repellent agent to the total weight of the bulk fibre and the spherical fibre assembly is between about 0.5% and about 5%, and more preferably between about 1% and about 2.5%.
  • the temperature of the heating is between about 110°C and about 200°C; and time of the heating is between about 2 minutes and about 10 minutes.
  • the heating treatment is in order to dry the water-repellent agent, thereby forming a water-repellent layer on the surface of the fibrous material. Generally it is heated for 2 minutes to 10 minutes at 110°C to 200°C.
  • An embodiment of the present invention provides a thermal insulation product filled with the foregoing thermal insulation filling material, which includes:
  • a cladding body configured to define enclosed internal space
  • thermal insulation filling material filled in enclosed internal space as defined by the cladding body, where the thermal insulation filling material includes: a bulk fibre; and a spherical fibre assembly; a water-repellent layer is formed on the surface of the bulk fibre and of the spherical fibre assembly, and the weight ratio of the bulk fibre to the spherical fibre assembly is between about 30:70 and about 70:30.
  • the foregoing thermal insulation filling material may be filled in an enclosed cladding structure, thereby forming a thermal insulation product that can be practically used.
  • the foregoing cladding body may be flexible material such as shell fabric or leather or the like, and thus can form enclosed internal space by means of sewing technology or the like. Therefore, the thermal insulation product is also flexible, and may deform to a certain extent as a user needs, thereby providing the user with more comfortable use experience.
  • raw materials used are as below:
  • Water-repellent agent 1 Scotchgard PM-3633, purchased from 3M China Limited.
  • Water-repellent agent 2 OLEOPHOBOL CP-SLA, purchased from Huntsman Corporation. 2. Performance test methods
  • a Clo value is tested in accordance with Standard ASTM F1868 Part C (i.e., Standard GB/T 11048), specifically including:
  • a water repellency test is conducted according to Standard GB/T 24120-2009, specifically including:
  • sample package 2 After the sample package 2 is washed according to Standard ISO6330 7A, drying it in an environment having a temperature of 20 ⁇ 1 °C and a relative humidity of 30 ⁇ 2%, recording the weight of the sample package 2 every ten minutes until it reaches a constant weight, and taking the time when the constant weight is achieved as the drying time.
  • washing the sample package 2 ten times according to Standard ISO6330 7 A, where washing is conducted by a FOM71 CLS type horizontal drum washing machine (purchased from Electrolux Corporation), in various steps it is stirred evenly and gently; concrete procedures of washing each time include: washing for 3 minutes at a water temperature of 40 ⁇ 3°C and a water level of 13cm without cooling down, where 20g standard detergent powder as stipulated in GB/T8629-2001 :7A is used; rinsing for the first time for 3 minutes at a water level of 13cm; rinsing for the second time for 3 minutes at a water level of 13cm, the dewatering time being 1 minute; rinsing for the third time for 2 minutes at a water level of 13cm, the dewatering time being 6 minutes; and then drying the sample package 2 by using a tumble dryer. Watching the infrared image of the sample package 2, and opening the sample package 2 to watch the appearance of the thermal insulation filling material therein.
  • thermo insulation filling materials are prepared by using the foregoing raw materials for use in various embodiments and comparative examples, specifically as follows:
  • a YYSL type carding machine purchased from Jiangsu Yingyang Nonwoven Machinery Co., Ltd.
  • Embodiment 1 Pneumatically conveying the material mixed into a dryer and drying for 6 minutes to 9 minutes at 120°C, thereby preparing the thermal insulation filling material in Embodiment 1 as shown in FIG. 1.
  • thermo insulation filling material in Embodiment 1 of the present invention is as shown in FIG. 1, from which it is clear that the fibres are fluffy and uniformly distributed, and have neither agglomeration nor intertwist, etc.
  • thermal insulation filling material purely bulk fibres
  • comparative example 1 because of intertwist among fibres.
  • down is successfully filled in thermal insulation filling materials in other embodiments and comparative examples. This indicates that the thermal insulation filling material of the present invention has good blowable processability, and can be filled by means of down blowing, thereby facilitating practically processing and using.
  • Table 1 Values of filling power of thermal insulation filling materials in various embodiments and comparative examples
  • thermal insulation filling materials in Embodiment 1 and Embodiment 2 of the present invention fall in between the thermal insulation filling material (purely bulk fibres) in comparative example 1 and the thermal insulation filling material (purely spherical fibre assemblies) in comparative example 2 in terms of filling power, and are respectively equivalent to the thermal insulation filling materials in comparative example 3 and comparative example 4.
  • thermo insulation filling materials in Embodiment 1 and Embodiment 2 of the present invention fall in between the thermal insulation filling material (purely bulk fibres) in comparative example 1 and the thermal insulation filling material (purely spherical fibre assemblies) in comparative example 2 in terms of compression resilience ratio, and are respectively equivalent to the thermal insulation filling materials in comparative example 3 and comparative example 4.
  • thermo insulation filling materials in Embodiment 1 and Embodiment 2 of the present invention fall in between the thermal insulation filling material (purely bulk fibres) in comparative example 1 and the thermal insulation filling material (purely spherical fibre assemblies) in comparative example 2 in terms of thermal insulation property (thickness and a Clo value), and are respectively equivalent to the thermal insulation filling materials in comparative example 3 and comparative example 4.
  • thermal insulation property thickness and a Clo value
  • water repellency grades of the thermal insulation filling materials of embodiments of the present invention are both Grade VI, much higher than the water repellency grades (Grade III) of the thermal insulation filling materials of various comparative examples. This indicates that good water repellency is obtained for the thermal insulation filling materials of the embodiments of the present invention by means of water repellency treatment.
  • thermal insulation filling materials are made into a sample package 2 according to the above methods, and the quick-drying property thereof is tested according to the above methods.
  • the results show that the drying time of the thermal insulation filling material of Embodiment 1 is 30 minutes, and the drying time of the thermal insulation filling material of comparative example 3 is more than 80 minutes. It is thus clear that the thermal insulation filling material of the embodiments of the present invention has good quick-drying property.
  • the appearance of various thermal insulation filling materials of Embodiment 1 is basically unchanged, still fluffy and uniform, and the infra-red photo thereof has no phenomenon of uneven light and shade. This indicates that the thermal insulation filling material of the embodiments of the present invention does not change in shape apparently after it is washed, and remains basically the same as before it is washed.
  • the thermal insulation filling material (purely bulk fibres) of comparative example 1 obviously forms patchy shadows, and the infra-red photo thereof has apparent uneven light and shade. This indicates that serious intertwist occurs in the thermal insulation filling material of comparative example 1 after it is washed, so that a lot of faultage where there is no thermal insulation filling material is formed in the sample package 2, which is difficult to be flapped uniformly, thereby having a negative effect on the appearance, the thermal insulation property and comfort or the like of a product.
  • the thermal insulation filling material of comparative example 3 also has the phenomenon of agglomeration and unevenness, and the infra-red photo thereof also has uneven light and shade, merely being not as much as the thermal insulation filling material of comparative example 1.
  • thermal resistance retention rate of various thermal insulation filling materials washed is as shown in FIG. 9. It is clear that thermal resistance retention rate of the thermal insulation filling material of the embodiments of the present invention is above 98%, apparently higher than the thermal resistance retention rate of the thermal insulation filling materials of various comparative examples.
  • the thermal insulation filling material of the embodiments of the present invention remains uniform after being washed many times, and does not apparently change in performance.
  • the thermal insulation filling materials of various comparative examples intertwine after being washed, and their performances degrade in different degrees. Therefore, the thermal insulation filling material of the embodiments of the present invention has excellent wash durability.
  • thermal insulation filling materials of comparative examples 3 and 4 consist of bulk fibres and spherical fibre assemblies and superior to the thermal insulation filling material (purely bulk fibres) of the comparative example 1 in terms of wash durability, they are apparently inferior to the thermal insulation filling material of the embodiments of the present invention.
  • the wash durability thereof can be improved, on this basis, the wash durability of the thermal insulation filling material can be further improved if the bulk fibres and spherical fibre assemblies are subjected to water repellency treatment.
  • Water repellency indicates the capability of fabrics not soaked by water
  • wash durability indicates the capability of fibres keeping properties unchanged (no agglomeration or intertwist) in the process of water washing. It is thus clear that the water repellency and the wash durability have different meanings, and no necessary relation is between both. Particularly, water washing is a process of longer time, thus in the process of water washing, fibres may be soaked by water eventually no matter the water repellency is good or bad. Therefore, according to the general viewpoint, water repellency seemingly has no effect on improving the wash durability. However, in the present invention, it is creatively found that by applying a water-repellent agent to mixed bulk fibres and spherical fibre assemblies, unexpectedly the wash durability thereof is improved, which is non-obvious.

Abstract

The present invention provides a thermal insulation filling material and preparation method thereof and a thermal insulation product, and pertains to the field of thermal insulation filling materials. The thermal insulation filling material of the present invention includes: a bulk fibre; and a spherical fibre assembly, where a water-repellent layer is formed on a surface of the bulk fibre and of the spherical fibre assembly, and a weight ratio of the bulk fibre to the spherical fibre assembly is between about 30:70 and about 70:30. The thermal insulation filling material is good in wash durability, and has comprehensive performance such as better blowable processability, quick-drying property, compression-resilience property, and thermal insulation property, etc. The method for preparing the thermal insulation filling material includes: adding a water-repellent agent in the process of gas-flow mixing the bulk fibre and the spherical fibre assembly, and then heating to form a water-repellent layer on the surface of the bulk fibre and of the spherical fibre assembly.

Description

THERMAL INSULATION FILLING MATERIAL AND PREPARATION METHOD THEREOF AND THERMAL INSULATION PRODUCT
Filed of the Invention
The present invention pertains to the field of thermal insulation filling materials, and specifically relates to a thermal insulation filling material and preparation method thereof and a thermal insulation product.
Background Art
Generally, thermal insulation materials are filled in clothes and bedclothes or the like to improve the thermal insulation property thereof. Generally, thermal insulation filling material is a bulk material including fine fibres. These fibres may mutually shift when they are under stress, so that the overall shape of a product may vary as a user flaps or presses, thereby better fitting in with the user's body and improving the use experience.
Conventional thermal insulation filling material mainly is natural down such as duck down, goose down, etc. The physical structure of natural down endows it with good filling power, compression-resilience property and thermal insulation property, etc. However, natural down is not stable in source, and thus is limited in yield, high in cost, and uneven in quality. In addition, natural down is generally poor in durability, is prone to mildewing and causing an anaphylactic reaction. For these reasons, the application scope of natural down is limited.
Therefore, people have been seeking artificial thermal insulation filling material that can replace natural down. Some fibre companies at home and abroad have successively launched down-like polyester staple fibre series as new-type filling materials. The prior art includes using different-sized polyester staple fibres and mixed materials thereof, for example, US 4588635 and US6329051; down and feather or mixed materials of other natural fibres and polyester staple fibres, for example, US20140206796 and US6329052; mixed materials of crimped polyester staple fibres and low-melting-point fibres, for example, US4992327. However, thermal insulation filling materials obtained by means of these prior arts are poor in thermal insulation property, filling power, compression-resilience property, wash durability, and blowable processability (i.e., processability by means of blowing), etc. Summary of the Invention
According to one aspect, the present invention provides a thermal insulation filling material, which is good in wash durability, and has combination properties such as better blowable processability, quick-drying property, compression-resilience property, and thermal insulation property, etc.
The thermal insulation filling material of the present invention includes:
a bulk fibre; and
a spherical fibre assembly;
wherein
a water-repellent layer is formed on a surface of the bulk fibre and of the spherical fibre assembly, and
a weight ratio of the bulk fibre to the spherical fibre assembly is between about 30:70 and about 70:30.
According to another aspect, the present invention provides a method for preparing thermal insulation filling material, in which, the foregoing thermal insulation filling material can be obtained by means of simple processes.
The method for preparing thermal insulation filling material includes:
gas-flow mixing a bulk fibre and a spherical fibre assembly to form a mixture, and adding a water-repellent agent in the mixing process, wherein a weight ratio of the bulk fibre to the spherical fibre assembly is between about 30:70 and about 70:30; and
heating to form a water-repellent layer on the surface of the bulk fibre and of the spherical fibre assembly.
According to another aspect, the present invention provides a thermal insulation product filled with the foregoing thermal insulation filling material. The thermal insulation product may be filled by means of blowing, is convenient for processing, and has combination properties such as excellent wash durability, quick-drying property, compression-resilience property, and thermal insulation property, etc.
The thermal insulation product includes:
a cladding body, configured to define enclosed internal space; and thermal insulation filling material filled in enclosed internal space as defined by the cladding body, wherein the thermal insulation filling material comprises: a bulk fibre; and a spherical fibre assembly, wherein a water-repellent layer is formed on a surface of the bulk fibre and of the spherical fibre assembly, and a weight ratio of the bulk fibre to the spherical fibre assembly is between about 30:70 and about 70:30.
Brief Description of the Drawings
FIG. 1 is a photo of thermal insulation filling material in Embodiment 1 of the present invention;
FIG. 2 is a comparison chart of test results of thermal insulation property of thermal insulation filling materials in embodiments of the present invention and a comparative example;
FIG. 3 is a photo of the washed thermal insulation filling material in Embodiment 1 of the present invention;
FIG. 4 is an infrared image of a washed sample package 2 filling the thermal insulation filling material in Embodiment 1 of the present invention;
FIG. 5 is a photo of the washed thermal insulation filling material in a comparative example 1 of the present invention;
FIG. 6 is an infrared image of a washed sample package 2 filling the thermal insulation filling material in the comparative example 1 of the present invention;
FIG. 7 is a photo of the washed thermal insulation filling material in a comparative example 3 of the present invention;
FIG. 8 is an infrared image of a washed sample package 2 filling the thermal insulation filling material in the comparative example 3 of the present invention; and
FIG. 9 is a comparison chart of test results of thermal resistance retention rate of the thermal insulation filling materials in embodiments and comparative examples.
Detailed Description of the Embodiments
In order for those skilled in the art to better understand the technical solution of the present invention, the following further describes in detail the present invention with reference to the accompanying drawings and embodiments. Phraseology interpretation
In the present invention, meanings of the following terms or descriptive approaches are as below:
Description of "between A and B" or "from A to B" includes a value of A, a value of B, and any value that is greater than A and smaller than B. For example, "between 1 and 10" includes, 1, 10 and any value that is greater than 1 and smaller than 10, for example, 2, 3, 4, 5, 6, 7, 8, 9, 2.3, 3.516, 5.26, 7.1 and 9.999, etc.
Description of "A is essentially equal to B" or "A is approximate to B" or "A is substantially equal to B" means that A conforms to B on the whole, allowing unavoidable small difference between A and B, and the difference being minor with respect to the dimension of B.
"Material dosage": in the present invention, material dosage or dosage ratio refers to weight or weight ratio unless specifically stated.
"Weight percentage of A in B" refers to percentage of A in B when A belongs to a part of B and weight of B is denoted by 100%.
"Weight ratio of A to B" refers to proportional relationship between weight of A and weight of B when A is different from other constituents of B.
"Fibre" refers to a continuous or discontinuous filament, the dimension of which in the length direction is far greater than that thereof in any direction in a cross section.
"Bulk fibre" refers to material consisting of a large number of fine, fluffy and irregular fibres, also referred to as "loose fibre".
"Spherical fibre assembly" refers to material consisting of a great number of "fibre balls", and fibre balls are basically spherical materials formed by winding fibres.
"Denier (D)" is a unit of fibre fineness, representing weight in grams of a 9,000-meter-long fibre at the conventional moisture regain.
"Clo value" is a parameter for evaluating the thermal insulation property of a material, which in essence is a thermal resistance value, the larger the value is, the better the thermal insulation property is. When a person sits quietly or engages in mild mental labor (with a calorific power of 209.2kJ/m2»h) at 21°C in a relative humidity smaller than 50% at an air speed not more than O. lm/s and feels comfortable, the Clo value for the clothes which the person wears is defined as 1. Thermal Insulation filling material
An embodiment of the present invention provides a thermal insulation filling material, which includes:
a bulk fibre; and
a spherical fibre assembly;
where
a water-repellent layer is formed on the surface of the bulk fibre and of the spherical fibre assembly, and
a weight ratio of the bulk fibre to the spherical fibre assembly is between about 30:70 and about 70:30.
The thermal insulation filling material of the embodiments of the present invention includes a bulk fibre and a spherical fibre assembly in a specific proportion, and a water-repellent layer is formed on the surface of the bulk fibre and of the spherical fibre assembly.
The water-repellent layer is a layer formed by a dried water-repellent agent, which is generally used to make a fabric surface have water repellency. However, in the embodiments of the present invention, the water-repellent layer is used on the surface of fibrous material. The water-repellent agent available in the embodiments of the present invention includes but is not limited to: any one or more of organofluorine water-repellent agents, organosilicone water-repellent agents, fluosilicic combination water-repellent agents, and hydrocarbon water-repellent agents.
In the present invention, it is creatively found that by mixing the bulk fibre and the spherical fibre assembly in a specific proportion and by forming a water-repellent layer on the surface thereof, the thermal insulation filling material obtained has excellent wash durability, and also has comprehensive performance such as better blowable processability, quick-drying property, compression-resilience property, and thermal insulation property, etc.
Preferably, the weight ratio of the bulk fibre to the spherical fibre assembly is between about 40:60 and about 60:40, more preferably between about 45:55 and about 55:45, and further preferably about 50:50. In other words, in the bulk fibre and the spherical fibre assembly, the weight percentage of the bulk fibre is between 30% and 70%, preferably between 40% and 60%>, more preferably between 45% and 55%, and the most preferably 50%. Correspondingly, the weight percentage of the spherical fibre assembly is between 30% and 70%, preferably between 40% and 60%, more preferably between 45% and 55%, and the most preferably 50%.
Preferably, the fibre constituting the bulk fibre has a length between about 15mm and about 75mm, and more preferably has a length between about 28mm and about 51mm.
Preferably, the fibre constituting the bulk fibre has a fineness between about 0.2D and about 15D, and more preferably has a fineness between about 0.5D and about 7D.
In other words, the fibre constituting the foregoing bulk fibre preferably has a length between 15mm and 75mm and a fineness between 0.2D and 15D, and more preferably has a length between 28mm and 51mm and a fineness between 0.5D and 7D.
Specifically, the fibre constituting the bulk fibre may have a crimp structure or a non-crimp structure.
Preferably, the fibre constituting the spherical fibre assembly has a length between about 15mm and about 75mm, and more preferably has a length between about 28mm and about 64mm.
Preferably, the fibre constituting the spherical fibre assembly has a fineness between about 0.7D and about 15D, and more preferably has a fineness between about 3D and about 7D.
In other words, the fibre constituting the foregoing spherical fibre assembly preferably has a length between 15mm and 75mm and a fineness between 0.7D and 15D, and more preferably has a length between 28mm and 64mm and a fineness between 3D and 7D.
Preferably, the fibre constituting the spherical fibre assembly has a three-dimensional crimp hollow structure.
In other words, the fibre for forming the foregoing spherical fibre assembly preferably has a three-dimensional crimp hollow structure, thereby facilitating forming a fibre ball.
Preferably, the spherical fibre assembly has a particle size ranged between about 3mm and about 15mm. In other words, in the spherical fibre assembly, the particle size of each fibre ball is preferably between 3mm and 15mm. It should be understood that in the spherical fibre assembly of the same thermal insulation filling material, different fibre balls may have different particle sizes, as long as they are within the foregoing range.
In terms of chemical constituent, fibres in the foregoing bulk fibre and the spherical fibre assembly include but are not limited to one or more of polyester fibre, polyamide fibre, polyvinyl chloride fibre, acrylic fibre and polypropylene fibre. However, as a preferred manner, the foregoing fibres are silicone fibres. For example, specifically available silicone fibres include silicone polyester fibres, etc.
It should be understood that in the same thermal insulation filling material, the fibre constituting the bulk fibre and the fibre constituting the spherical fibre assembly may be the same kind of fibre or different fibres (for example, different chemical constituents, lengths, finenesses and degrees of crimp or the like). Furthermore, the bulk fibre (or the spherical fibre assembly) itself may consist of the same kind of fibre or multiple different fibres.
It should be understood that although it is described hereinabove the bulk fibre and the spherical fibre assembly necessarily included in the thermal insulation filling material, it is also practicable if the thermal insulation filling material further includes other known constituents or additives, etc. Method for preparing thermal insulation filling material
An embodiment of the present invention provides a method for preparing thermal insulation filling material, which includes:
gas-flow mixing a bulk fibre and a spherical fibre assembly to form a mixture, and adding a water-repellent agent in the mixing process, where the weight ratio of the bulk fibre to the spherical fibre assembly is between about 30:70 and about 70:30; and
heating to form a water-repellent layer on the surface of the bulk fibre and of the spherical fibre assembly.
In the method for preparing thermal insulation filling material of the embodiments of the present invention, gasflow is used to mix the bulk fibre and the spherical fibre assembly, and the water-repellent agent is introduced simultaneously. In this way, the water repellency treatment process and the mixing process are combined as one, and the preparation process is simplified. Furthermore, in the mixing process, materials are fully stirred to ensure a mixing uniformity. Thus, the water-repellent agent added in the mixing process naturally uniformly dispersed on the surface of the fibrous material, thereby forming a uniform and complete layer of a water-repellent agent, and ensuring a good effect of water repellency treatment.
Preferably, the ratio of the weight of the water-repellent agent to the total weight of the bulk fibre and the spherical fibre assembly is between about 0.5% and about 5%, and more preferably between about 1% and about 2.5%.
Usage amount of the water-repellent agent is apparently related to the performance of a final product. In the embodiments of the present invention, it is discovered that when the total weight of fibres (the bulk fibre and the spherical fibre assembly) is 100%, the relative weight of the water-repellent agent is from 0.5% to 5%, and more preferably from 1% to 2.5%.
Preferably, the temperature of the heating is between about 110°C and about 200°C; and time of the heating is between about 2 minutes and about 10 minutes.
The heating treatment is in order to dry the water-repellent agent, thereby forming a water-repellent layer on the surface of the fibrous material. Generally it is heated for 2 minutes to 10 minutes at 110°C to 200°C.
Thermal insulation product
An embodiment of the present invention provides a thermal insulation product filled with the foregoing thermal insulation filling material, which includes:
a cladding body, configured to define enclosed internal space; and
thermal insulation filling material filled in enclosed internal space as defined by the cladding body, where the thermal insulation filling material includes: a bulk fibre; and a spherical fibre assembly; a water-repellent layer is formed on the surface of the bulk fibre and of the spherical fibre assembly, and the weight ratio of the bulk fibre to the spherical fibre assembly is between about 30:70 and about 70:30. In other words, the foregoing thermal insulation filling material may be filled in an enclosed cladding structure, thereby forming a thermal insulation product that can be practically used.
Preferably, the cladding body is a flexible cladding body.
In other words, the foregoing cladding body may be flexible material such as shell fabric or leather or the like, and thus can form enclosed internal space by means of sewing technology or the like. Therefore, the thermal insulation product is also flexible, and may deform to a certain extent as a user needs, thereby providing the user with more comfortable use experience.
Preferably, the foregoing thermal insulation product may be bedclothes, clothes or the like, a specific example thereof includes but is not limited to: shoes, a cap, clothes (including a coat, trousers, underclothes, overclothes or the like), a pillow, a quilt, a mattress, a sleeping bag, etc.
Embodiments
The following provides a more detailed description of the embodiments of the present invention.
1. Raw materials
In the embodiments of the present invention, raw materials used are as below:
Fibrous raw material 1 : three-dimensional hollow silicone polyester fibre, having a length of 64mm and a fineness of 3D, purchased from Sinopec Yizheng Chemical Fibre Company Limited (YCF).
Fibrous raw material 2: three-dimensional hollow silicone polyester fibre, having a length of 64mm and a fineness of 3D, purchased from Far Eastern Industries (shanghai) Co., Ltd.
Water-repellent agent 1 : Scotchgard PM-3633, purchased from 3M China Limited.
Water-repellent agent 2: OLEOPHOBOL CP-SLA, purchased from Huntsman Corporation. 2. Performance test methods
In order to evaluate the performance of thermal insulation filling materials in various embodiments and comparative examples, it is necessary to conduct a series of performance tests, and specific test methods are as below:
1) Sample package preparation
Sewing 90g of sample into a 12 inch>< 12 inch nylon cloth package, and serving as a sample package 1.
Blowing the sample to a 50cmx50cm nylon cloth package according to a filling amount of 200g/m2 (gsm), and sewing five 10cmx50cm rectangular quilted lattice, and thus obtaining a sample package 2.
2) Blowable processability
Conducting a down filling test on various samples by using a Bealead 126B down filling machine to watch whether a successful down filling is available to samples.
3) Filling power
Selecting 28.4g of dried sample and dispersing small clusters having a diameter of about 2.5cm, then filling into an organic glass cylinder having volume scale (with a diameter of about 24.5cm and a height greater than 50cm); placing a pressure plate (having a weight of about 68.4g and a diameter of about 24cm) slightly in the organic glass cylinder, and start timing when the pressure plate touches samples, after 30s recording the scale value (with a unit of cubic inch) of the organic glass cylinder corresponding to an edge of the pressure plate, measuring thrice and taking an average value, thereby obtaining a value of filling power of the sample.
4) Compression-resilience property
The compression-resilience property of the sample is tested according to Standard ASTM D6571-01(2001), specifically including:
Placing the sample package 1 on the base plate of a thickness gauge, applying a weight of 0.411b to the center of the pressure plate according to requirements for the foregoing Standard, recording the initial thickness A of the sample package 1; continuing applying an additional weight up to 16 lb according to the foregoing Standard and placing for 24h; then relieving the additional weight to 0.41 lb, and recording the recovered thickness value C of the sample package 1 after waiting for lh; then calculating a short-term compression resilience ratio(%): 100%xC/A.
5) Thermal insulation property
Testing the thickness of the sample package 2 thrice at a pressure of 20Pa, and taking the average value thereof as the thickness value.
A Clo value is tested in accordance with Standard ASTM F1868 Part C (i.e., Standard GB/T 11048), specifically including:
Spreading the sample package 2 on a test board having an area of A, then heating the test board with a heating power H; after the temperature becomes stable, recording the surface temperature Tm of the test board and the ambient temperature (air temperature) Ta; and calculating a thermal resistance R, R=[Ax(Tm-Ta)/(H— ΔΗ)]— Ro, where ΔΗ is a predetermined heating power correction, and Ro is a predetermined thermal resistance correction; and correspondingly, obtaining a Clo value=6.451R.
6) Water repellency
A water repellency test is conducted according to Standard GB/T 24120-2009, specifically including:
placing a sample of a certain thickness on a transparent glass plate, and respectively dropping a drop of ethanol solution (the content of ethanol in ethanol solution having an n"1 grade is n>< 10%) in five different positions of the sample; after certain time, comparing the permeation and diffusion of the liquid droplet with a standard condition, and judging it whether or not passes the test, testing again with ethanol solution having a higher grade if it passes the test, the highest grade of the ethanol solution by using which the sample can pass the test is the water repellency grade, and the higher the water repellency grade, the better the water repellency is.
7) Quick-drying property
After the sample package 2 is washed according to Standard ISO6330 7A, drying it in an environment having a temperature of 20±1 °C and a relative humidity of 30±2%, recording the weight of the sample package 2 every ten minutes until it reaches a constant weight, and taking the time when the constant weight is achieved as the drying time.
Washing is conducted by a FOM71 CLS type horizontal drum washing machine
(purchased from Electrolux Corporation), where in various steps it is stirred evenly and gently; concrete procedures of washing each time include: washing for 3 minutes at a water temperature of 40±3°C and a water level of 13cm without cooling down, where 20g standard detergent powder as stipulated in GB/T8629-2001 :7A is used; rinsing for the first time for 3 minutes at a water level of 13cm; rinsing for the second time for 3 minutes at a water level of 13cm, the dewatering time being 1 minute; rinsing for the third time for 2 minutes at a water level of 13cm, the dewatering time being 6 minutes.
8) Wash durability
Washing the sample package 2 ten times according to Standard ISO6330 7 A, where washing is conducted by a FOM71 CLS type horizontal drum washing machine (purchased from Electrolux Corporation), in various steps it is stirred evenly and gently; concrete procedures of washing each time include: washing for 3 minutes at a water temperature of 40±3°C and a water level of 13cm without cooling down, where 20g standard detergent powder as stipulated in GB/T8629-2001 :7A is used; rinsing for the first time for 3 minutes at a water level of 13cm; rinsing for the second time for 3 minutes at a water level of 13cm, the dewatering time being 1 minute; rinsing for the third time for 2 minutes at a water level of 13cm, the dewatering time being 6 minutes; and then drying the sample package 2 by using a tumble dryer. Watching the infrared image of the sample package 2, and opening the sample package 2 to watch the appearance of the thermal insulation filling material therein.
Conducting a thermal resistance test (i.e., a Clo value test) on the sample package 2 washed, and calculating a thermal resistance retention rate (%)=100x(the Clo value after washing)/(the Clo value before washing).
3. Embodiments and comparative example
Different thermal insulation filling materials are prepared by using the foregoing raw materials for use in various embodiments and comparative examples, specifically as follows:
Embodiment 1
Selecting 5kg of the fibrous raw material 1 and forming a bulk fibre by means of opening and carding by using a YYSL type carding machine (purchased from Jiangsu Yingyang Nonwoven Machinery Co., Ltd.). Selecting 5kg of the fibrous raw material 1 and forming fibre balls having a particle size from 3mm to 15mm by using a ball forming mill (a HJZZM-100 type ball fibre machine purchased from Kunshan City, Hai Jin Machinery Co., Ltd.), serving as spherical fibre assemblies.
Feeding the two materials into an air-laid feeder (purchased from American Rando
Corporation) at a spiked apron rate of 15HZ to fully mix; simultaneously spraying the water-repellent agent 1 on the materials being mixed by means of a spraying device of the air-laid feeder, the nozzle pressure being 0.6MPa, and a total weight of 200g of the water-repellent agent 1 being used (i.e., the ratio of the weight of the water-repellent agent to the total weight of the bulk fibre and the spherical fibre assembly is 2%).
Pneumatically conveying the material mixed into a dryer and drying for 6 minutes to 9 minutes at 120°C, thereby preparing the thermal insulation filling material in Embodiment 1 as shown in FIG. 1.
Embodiment 2
Selecting 7kg of the fibrous raw material 2 and forming a bulk fibre by means of opening by using a HJKM-PP type opening machine (purchased from Kunshan City, Hai Jin Machinery Co., Ltd.).
Selecting 3kg of the fibrous raw material 2 and forming fibre balls having a particle size from 3mm to 15mm by using a ball forming mill (a HJZZM-100 type ball fibre machine purchased from Kunshan City, Hai Jin Machinery Co., Ltd.), serving as spherical fibre assemblies.
Feeding the two materials into a Brad air-laid machine (described in US Patents US2005/0098910, US2010/0092746 and US7491354, and a PCT patent WO2011/133396A) to fully mix, where the rotating speed of a rotary roller is 180r/min, and the running speed of a belt screen is 3m/min; simultaneously spraying the water-repellent agent 2 on the materials being mixed by means of a spraying device at the side of the device, the nozzle pressure being 0.6MPa, and a total weight of the water-repellent agent 2 used being 300g (i.e., the ratio of the weight of the water-repellent agent to the total weight of the bulk fibre and the spherical fibre assembly is 3%). Pneumatically conveying the material mixed into a dryer and drying for 5 minutes to 8 minutes at 150°C, thereby preparing the thermal insulation filling material in Embodiment 2.
Comparative Embodiment 1
Selecting the foregoing fibrous raw material 1, and forming a bulk fibre (i.e., the thermal insulation filling material in comparative example 1) by means of opening and carding by using the carding machine.
Comparative Embodiment 2
Selecting the fibrous raw material 1 and forming fibre balls having a particle size from 3mm to 15mm by using the foregoing ball forming mill, serving as separate spherical fibre assemblies, i.e., the thermal insulation filling material in comparative example 2.
Comparative Embodiment 3
Selecting 5kg of the fibrous raw material 1 and forming a bulk fibre by means of opening and carding by using the foregoing carding machine.
Selecting 5kg of the fibrous raw material 1 and forming fibre balls having a particle size from 3mm to 15mm by using the foregoing ball forming mill, serving as spherical fibre assemblies.
Feeding the two materials into the foregoing air-laid feeder at a spiked apron rate of 15HZ to fully mix, thereby preparing the thermal insulation filling material in Embodiment 3.
Comparative Embodiment 4
Selecting 7kg of the fibrous raw material 2 and forming a bulk fibre by means of opening by using the foregoing carding machine.
Selecting 3kg of the fibrous raw material 2 and forming fibre balls having a particle size from 3mm to 15mm by using the foregoing ball forming mill, serving as spherical fibre assemblies.
Feeding the two materials into the foregoing Brad air-laid machine to fully mix, thereby preparing the thermal insulation filling material in comparative example 4. 4. Performance test results
Performance tests of the thermal insulation filling materials in various embodiments and comparative examples are conducted according to the foregoing performance test methods, and specific test results are as below:
1) Appearance
The appearance of the thermal insulation filling material in Embodiment 1 of the present invention is as shown in FIG. 1, from which it is clear that the fibres are fluffy and uniformly distributed, and have neither agglomeration nor intertwist, etc.
2) Blowable processability
Down is filled in various thermal insulation filling materials according to the foregoing methods.
The down filling mouth is blocked by the thermal insulation filling material (purely bulk fibres) in comparative example 1 because of intertwist among fibres. However, down is successfully filled in thermal insulation filling materials in other embodiments and comparative examples. This indicates that the thermal insulation filling material of the present invention has good blowable processability, and can be filled by means of down blowing, thereby facilitating practically processing and using.
3) Filling power
Values of filling power of various thermal insulation filling materials are measured by using the foregoing methods, and the results are as below:
Table 1 Values of filling power of thermal insulation filling materials in various embodiments and comparative examples
Figure imgf000016_0001
It is clear that the thermal insulation filling materials in Embodiment 1 and Embodiment 2 of the present invention fall in between the thermal insulation filling material (purely bulk fibres) in comparative example 1 and the thermal insulation filling material (purely spherical fibre assemblies) in comparative example 2 in terms of filling power, and are respectively equivalent to the thermal insulation filling materials in comparative example 3 and comparative example 4. This indicates that by mixing the spherical fibre assembly and the bulk fibre, a filling power falling in between that of the two raw materials can be obtained, and water repellency treatment does not have a negative impact on filling power.
4) Compression-resilience property
Various thermal insulation filling materials are made into a sample package 1 according to the above methods, and the compression-resilience property thereof is tested, the test results are as below:
Table 2 Short-term compression resilience ratio of thermal insulation filling materials in various embodiments and comparative examples
Figure imgf000017_0001
It is clear that the thermal insulation filling materials in Embodiment 1 and Embodiment 2 of the present invention fall in between the thermal insulation filling material (purely bulk fibres) in comparative example 1 and the thermal insulation filling material (purely spherical fibre assemblies) in comparative example 2 in terms of compression resilience ratio, and are respectively equivalent to the thermal insulation filling materials in comparative example 3 and comparative example 4. This indicates that by mixing the spherical fibre assembly and the bulk fibre, a compression resilience ratio falling in between that of the two raw materials can be obtained, and water repellency treatment does not have a negative impact on the compression resilience ratio.
5) Thermal insulation property
Various thermal insulation filling materials are made into a sample package 2 according to the above methods, and the thermal insulation property thereof is tested, the test results are as shown in FIG. 2.
It is clear that the thermal insulation filling materials in Embodiment 1 and Embodiment 2 of the present invention fall in between the thermal insulation filling material (purely bulk fibres) in comparative example 1 and the thermal insulation filling material (purely spherical fibre assemblies) in comparative example 2 in terms of thermal insulation property (thickness and a Clo value), and are respectively equivalent to the thermal insulation filling materials in comparative example 3 and comparative example 4. This indicates that by mixing the spherical fibre assembly and the bulk fibre, a thermal insulation property falling in between that of the two raw materials can be obtained, and water repellency treatment does not have a negative impact on the thermal insulation property.
6) Water repellency
Water repellency of various thermal insulation filling materials are tested by using the foregoing methods, and the test results are as below:
Table 3 Water repellency of thermal insulation filling materials in various
embodiments and comparative examples
Figure imgf000018_0001
It is clear that water repellency grades of the thermal insulation filling materials of embodiments of the present invention are both Grade VI, much higher than the water repellency grades (Grade III) of the thermal insulation filling materials of various comparative examples. This indicates that good water repellency is obtained for the thermal insulation filling materials of the embodiments of the present invention by means of water repellency treatment.
7) Quick-drying property
Various thermal insulation filling materials are made into a sample package 2 according to the above methods, and the quick-drying property thereof is tested according to the above methods. The results show that the drying time of the thermal insulation filling material of Embodiment 1 is 30 minutes, and the drying time of the thermal insulation filling material of comparative example 3 is more than 80 minutes. It is thus clear that the thermal insulation filling material of the embodiments of the present invention has good quick-drying property.
8) Wash durability
Various thermal insulation filling materials are made into a sample package 2 according to the above methods, and the sample package 2 is washed ten times according to the above methods.
As shown in FIG. 3 and FIG. 4, the appearance of various thermal insulation filling materials of Embodiment 1 is basically unchanged, still fluffy and uniform, and the infra-red photo thereof has no phenomenon of uneven light and shade. This indicates that the thermal insulation filling material of the embodiments of the present invention does not change in shape apparently after it is washed, and remains basically the same as before it is washed.
As shown in FIG. 5 and FIG. 6, after being washed, the thermal insulation filling material (purely bulk fibres) of comparative example 1 obviously forms patchy shadows, and the infra-red photo thereof has apparent uneven light and shade. This indicates that serious intertwist occurs in the thermal insulation filling material of comparative example 1 after it is washed, so that a lot of faultage where there is no thermal insulation filling material is formed in the sample package 2, which is difficult to be flapped uniformly, thereby having a negative effect on the appearance, the thermal insulation property and comfort or the like of a product.
As shown in FIG. 7 and FIG. 8, after being washed, the thermal insulation filling material of comparative example 3 also has the phenomenon of agglomeration and unevenness, and the infra-red photo thereof also has uneven light and shade, merely being not as much as the thermal insulation filling material of comparative example 1.
The thermal resistance retention rate of various thermal insulation filling materials washed is as shown in FIG. 9. It is clear that thermal resistance retention rate of the thermal insulation filling material of the embodiments of the present invention is above 98%, apparently higher than the thermal resistance retention rate of the thermal insulation filling materials of various comparative examples.
It is thus clear that the thermal insulation filling material of the embodiments of the present invention remains uniform after being washed many times, and does not apparently change in performance. However, the thermal insulation filling materials of various comparative examples intertwine after being washed, and their performances degrade in different degrees. Therefore, the thermal insulation filling material of the embodiments of the present invention has excellent wash durability.
Particularly, although the thermal insulation filling materials of comparative examples 3 and 4 consist of bulk fibres and spherical fibre assemblies and superior to the thermal insulation filling material (purely bulk fibres) of the comparative example 1 in terms of wash durability, they are apparently inferior to the thermal insulation filling material of the embodiments of the present invention. This indicates that with respect to a purely fibrous material, by mixing bulk fibres and spherical fibre assemblies, the wash durability thereof can be improved, on this basis, the wash durability of the thermal insulation filling material can be further improved if the bulk fibres and spherical fibre assemblies are subjected to water repellency treatment.
Water repellency indicates the capability of fabrics not soaked by water, wash durability indicates the capability of fibres keeping properties unchanged (no agglomeration or intertwist) in the process of water washing. It is thus clear that the water repellency and the wash durability have different meanings, and no necessary relation is between both. Particularly, water washing is a process of longer time, thus in the process of water washing, fibres may be soaked by water eventually no matter the water repellency is good or bad. Therefore, according to the general viewpoint, water repellency seemingly has no effect on improving the wash durability. However, in the present invention, it is creatively found that by applying a water-repellent agent to mixed bulk fibres and spherical fibre assemblies, unexpectedly the wash durability thereof is improved, which is non-obvious.
In conclusion, the thermal insulation filling material of the embodiments of the present invention is good in wash durability, and has combination properties such as better blowable processability, quick-drying property, compression-resilience property, and thermal insulation property, etc. Furthermore, by means of the foregoing preparation method, the mixing and the water repellency treatment may be simultaneously conducted, thereby obtaining the thermal insulation filling material having excellent property by means of a simple method.
It is to be understood that the foregoing implementation manners are merely exemplary implementation manners to describe the principle of the present invention. However, the present invention is not limited to this. To those of ordinary skill in the art, various modifications and improvements may be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also deemed to be within the scope of protection of the present invention.

Claims

What is claimed is:
1. A thermal insulation filling material, comprising:
a bulk fibre; and
a spherical fibre assembly;
wherein
a water-repellent layer is formed on a surface of the bulk fibre and of the spherical fibre assembly, and
a weight ratio of the bulk fibre to the spherical fibre assembly is between about 30:70 and about 70:30.
2. The thermal insulation filling material of claim 1, wherein
the weight ratio of the bulk fibre to the spherical fibre assembly is between about 40:60 and about 60:40.
3. The thermal insulation filling material of claim 1, wherein
a fibre constituting the bulk fibre has a length between about 15mm and 75mm.
4. The thermal insulation filling material of claim 3, wherein
the fibre constituting the bulk fibre has a length between about 28mm and about
51mm.
5. The thermal insulation filling material of claim 1, wherein
a fibre constituting the bulk fibre has a fineness between about 0.2D and about
15D.
6. The thermal insulation filling material of claim 5, wherein
the fibre constituting the bulk fibre has a fineness between about 0.5D and about
7D.
7. The thermal insulation filling material of claim 1, wherein
a fibre constituting the spherical fibre assembly has a length between about 15mm and 75mm.
8. The thermal insulation filling material of claim 7, wherein
the fibre constituting the spherical fibre assembly has a length between about 28mm and about 64mm.
9. The thermal insulation filling material of claim 1, wherein
a fibre constituting the spherical fibre assembly has a fineness between about 0.7D and about 15D.
10. The thermal insulation filling material of claim 9, wherein
the fibre constituting the spherical fibre assembly has a fineness between about 3D and about 7D.
11. The thermal insulation filling material of claim 1, wherein
the spherical fibre assembly has a particle size between about 3mm and about
15mm.
12. The thermal insulation filling material of claim 1, wherein
a fibre constituting the spherical fibre assembly has a three-dimensional crimp hollow structure.
13. The thermal insulation filling material of claim 1, wherein
fibres constituting the bulk fibre and the spherical fibre assembly are silicone fibres.
14. A method for preparing thermal insulation filling material, comprising:
gas-flow mixing a bulk fibre and a spherical fibre assembly to form a mixture, and adding a water-repellent agent in the mixing process, wherein a weight ratio of the bulk fibre to the spherical fibre assembly is between about 30:70 and about 70:30; and heating to form a water-repellent layer on the surface of the bulk fibre and of the spherical fibre assembly.
15. The method for preparing thermal insulation filling material according to claim
14, wherein
the ratio of the weight of the water-repellent agent to the total weight of the bulk fibre and the spherical fibre assembly is between about 0.5% and about 5%.
16. The method for preparing thermal insulation filling material according to claim
15, wherein
the ratio of the weight of the water-repellent agent to the total weight of the bulk fibre and the spherical fibre assembly is between about 1% and about 2.5%.
17. The method for preparing thermal insulation filling material according to claim 14, wherein
a temperature of the heating is between about 110°C and about 200°C; and time of the heating is between about 2 minutes and about 10 minutes.
18. A thermal insulation product, comprising:
a cladding body, configured to define enclosed internal space; and
thermal insulation filling material filled in enclosed internal space as defined by the cladding body, wherein the thermal insulation filling material comprises: a bulk fibre; and a spherical fibre assembly, wherein a water-repellent layer is formed on a surface of the bulk fibre and of the spherical fibre assembly, and a weight ratio of the bulk fibre to the spherical fibre assembly is between about 30:70 and about 70:30.
19. The thermal insulation product of claim 18, wherein
the cladding body is a flexible cladding body.
20. The thermal insulation product of claim 18, wherein
the thermal insulation product is any one of shoes, a cap, clothes, a pillow, a quilt, a mattress and a sleeping bag.
wherein providing the ESD discharge path includes receiving an ESD event at a drain terminal of the NMOS transistor and discharging the ESD event through the source terminal of the NMOS transistor to ground.
PCT/US2016/068283 2015-12-30 2016-12-22 Thermal insulation filling material and preparation method thereof and thermal insulation product WO2017116976A1 (en)

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