WO2021249890A1 - Structure textile - Google Patents

Structure textile Download PDF

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Publication number
WO2021249890A1
WO2021249890A1 PCT/EP2021/065035 EP2021065035W WO2021249890A1 WO 2021249890 A1 WO2021249890 A1 WO 2021249890A1 EP 2021065035 W EP2021065035 W EP 2021065035W WO 2021249890 A1 WO2021249890 A1 WO 2021249890A1
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WO
WIPO (PCT)
Prior art keywords
textile structure
layer
polymer
strips
range
Prior art date
Application number
PCT/EP2021/065035
Other languages
English (en)
Inventor
Dennis Wilbers
Monica LOPEZ-LORENZO
Alex VAN NOREL
Rene Journee
Maria PERSSON
Original Assignee
Teijin Aramid B.V.
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 Teijin Aramid B.V. filed Critical Teijin Aramid B.V.
Priority to EP21728945.3A priority Critical patent/EP4161769A1/fr
Publication of WO2021249890A1 publication Critical patent/WO2021249890A1/fr

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Classifications

    • 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
    • B32B5/024—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
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • 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
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • 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
    • B32B5/028—Net structure, e.g. spaced apart filaments bonded at the crossing points
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • 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
    • B32B2262/0253—Polyolefin 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
    • 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
    • B32B2262/0261—Polyamide 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
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/514—Oriented
    • B32B2307/516—Oriented mono-axially
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/582—Tearability
    • B32B2307/5825—Tear resistant
    • 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

Definitions

  • the invention pertains to a textile structure, a method to manufacture the textile structure and to an article of clothing comprising said textile structure.
  • the textile structure and the article of clothing are particularly suitable for medical, chemical and biological protective clothing.
  • Textile protective clothing protects the wearer against various hazards, including pathogens and toxic substances, by inhibiting penetration of such substances.
  • the textile structure has to have sufficient strength to resist tearing.
  • the strength of the material is controllable for different applications.
  • the textile structure and clothing made thereof should be comfortable, flexible and light-weight.
  • US3,629,047 discloses a sandwiched textile structure comprising a scrim comprised of at least two webs being placed between at least two outer layers of nonwoven staple fibers.
  • Each web of the scrim is comprised of a plurality of essentially parallel, continuous monofilament strands of a synthetic hydrophobic polymer.
  • the web results from fibrillation of a striated film which will split at the thin areas and the thick areas remain as continuous strands.
  • the strands of the scrim are either unbonded or only lightly bonded to one another and to the outer layers whereby they have a substantial degree of movement when stress is applied.
  • This textile structure has the disadvantage of lesser mechanical strength and is not suitable for washing and re-use because it is based on a split striated film and unbonded or lightly bonded scrim layers. Further, it provides no protection against liquids.
  • W02017/151096 is directed to elastic laminates and describes a laminate including a core structure having a first and second surface, the core structure includes an elastic core layer and a plastic core layer, each of them selected from a film, a plurality of strands and a plurality of strips.
  • a nonwoven is affixed to the first surface.
  • the elastic laminate is produced by affixing the nonwoven to the stretched elastic web. Subsequently, the laminate is stretched to locally tear the facing materials.
  • the resulting laminate has high elasticity and an elongation of 150 to 250%.
  • Improved textile structures are required, in particular textile structures combining improved mechanical properties and protection against liquids and liquid penetration.
  • such textile structure is washable and re-useable.
  • a textile structure being a laminate and comprising:
  • the textile structure is light-weight, protects against exposure with aqueous liquids (including blood, body fluids, aerosols, airborne particles, organic and inorganic chemicals and toxins), exhibits high tear and puncture resistance and high tensile strength.
  • aqueous liquids including blood, body fluids, aerosols, airborne particles, organic and inorganic chemicals and toxins
  • the textile structure is a laminate, wherein the polymer layer, the layer of uniaxially oriented material and the nonwoven fabric are intimately bonded and form a layered material.
  • the layers of the laminate adhere to each other strongly, meaning that the peel strength between each layer is at least 3 N/50 mm, preferably at least 4 N/50 mm, more preferably at least 5 N/50 mm.
  • the peel strength is measured by means of a manual T-peel test.
  • An A4-size sample of the stacked layers is laid down on the extended lower belt of a flatbed lamination machine (e.g.
  • a strip with a width of about 2 to 5 cm of a release paper is placed between the layers of which the adhesion is to be tested, e.g. between the polymer layer selected from a polymer film and a polymer membrane and the layer of uniaxially oriented material comprising a plurality of strips interconnected by fibrils. After lamination, strips with a width of 50 mm are cut from the laminate in machine direction. The release paper is removed and the loose end of e.g.
  • the polymer layer or the layer of uniaxially oriented material is clamped to a Kern CH hanging scale.
  • the other end of the same strip is clamped horizontally (flat) to a table.
  • the hanging scale is lifted up manually in vertical direction.
  • the maximum force before the clamped layer is released from the laminate or when the clamped layer tears is noted as the peel strength in N/50 mm. Due to the strong adhesion between the layers, the textile structure is durable and even washable. This allows re-use of the textile structure.
  • the textile structure may comprise further layers.
  • the textile structure being a laminate comprises more than one layer of uniaxially oriented material comprising a plurality of strips interconnected by fibrils, which layers of uniaxially oriented material are not in direct contact with each other but separated from each other by another layer.
  • the textile structure being a laminate comprises not more than one layer of uniaxially oriented material comprising a plurality of strips interconnected by fibrils.
  • the textile structure being a laminate consists of:
  • the polymer layer is selected from a polymer film and a polymer membrane.
  • the polymer layer prevents penetration of aqueous liquids, in particular in the form of sprays, small splashes and droplets.
  • the polymer film may also be referred to as foil.
  • the polymer film is a monolithic film, i.e. formed as uniform, solid material.
  • the polymer film is non-porous.
  • the polymer film comprises a thermoplastic polymer selected from polyethylene terephthalate (PET), preferably biaxially oriented PET (boPET), poly lactic acid (PLA), polyamide (PA), polyvinyl chloride (PVC), cellulose-acetates, polyurethane (PU), casein, ethyl-vinyl acetate and polyolefin.
  • PET polyethylene terephthalate
  • PLA polylactic acid
  • PA polyamide
  • PVC polyvinyl chloride
  • PU polyurethane
  • casein ethyl-vinyl acetate
  • polyolefins for the polymer film are polyethylene, polypropylene or copolymers thereof, more preferably a low density polyethylene (LDPE), a medium density polyethylene (MDPE) or a high density polyethylene (HDPE).
  • LDPE low density polyethylene
  • MDPE medium density polyethylene
  • HDPE high density polyethylene
  • LDPE has a density in the range of 0.915 to 0.925 g/cm 3
  • MDPE has a density in the range of 0.925 to 0.94 g/cm 3
  • HDPE has a density in the range of 0.94 to 0.97 g/cm 3 .
  • the polymer layer in particular the polymer film has a weight per unit area in the range of 4 to 50 g/m 2 or more preferably of 5 to 30 g/m 2 , even more preferably in the range of 7 to 25 g/m 2 or 10 to 20 g/m 2 .
  • the polymer layer has an elongation at break of at least 50% more preferably 100%, even more preferably 200% determined by EN 13943-1.
  • the polymer layer has a thickness in the range of 5 to 60 pm, more preferably 6 to 40 pm, even more preferably 10 to 30 pm determined by a suitable micrometer.
  • Polymer layers having such thickness and elongation at break show improved abrasion resistance.
  • the polymer membrane basically any water-impermeable and water vapor-permeable polymer membrane is suitable.
  • the polymer membrane is a porous membrane comprising or consisting of a hydrophobic polymer, e.g. (elongated) polytetrafluoroethylene (available e.g. as Teflon®). Gore-Tex® is an example of such microporous membrane.
  • the polymer membrane is non-porous and comprises or consists of at least one hydrophilic polymer, preferably a polyether ester, a polyether amide, a polyether urethane, a copolyetheresteramide, a copolyetheresterurethane, or a mixture of two or more of those.
  • the polymer membrane comprises ultra high molecular weight polyethylene (available e.g. as Miraim® by Teijin Ltd).
  • the polymer membrane is a composite membrane comprising both an ultrahigh molecular weight polyethylene membrane and a polyester non-woven layer, as commercially available from Teijin Ltd.
  • the textile structure comprises a polymer membrane
  • the textile structure preferably comprises at least one further layer which is arranged towards the outside (i.e. away from the wearer in an article of clothing) and which protects the polymer membrane against physical damage and soiling. Soiling can damage the polymer membrane and/or block pores in microporous membranes.
  • the layer of uniaxially oriented material comprising a plurality of strips interconnected by fibrils may be manufactured as described in WO2017/148628.
  • the layer of uniaxially oriented material comprising a plurality of strips interconnected by fibrils may also be manufactured by using a rotating needle roll or a rotating grooved bar to split the film.
  • the layer of uniaxially oriented material is obtained by splitting a tape or film of uniaxially oriented material into strips that are interconnected by fibrils.
  • the tape or film used for making the layer of uniaxially oriented material is not striated and has an even thickness, i.e.
  • the maximum and minimum thickness of the tape or film differs less than 10%, preferably less than 5% from the average thickness of the tape or film. This results in strips and fibrils of the same thickness.
  • the strips may generally be continuous along the uniaxial orientation of the material and may be substantially parallel to each other. Substantially parallel means that the distance between the strips over the length of the strips varies by at most 10%.
  • the layer of uniaxially oriented material is thus different from spunbond and spunlaced, drylaid, spunlaid, wetlaid, flashspun, airlaid nonwoven fabrics and meltblown fabrics and electrospun layers which comprise randomly oriented filaments of substantially the same size.
  • the layer of uniaxially oriented material provides the textile structure with tear and puncture resistance and tensile strength.
  • the tensile strength of the layer of uniaxially oriented material is higher than of nonwoven materials.
  • the tensile strength of the layer of uniaxially oriented material is at least 20%, more preferably at least 40% or even at least 60% higher than that of conventionally used nonwovens.
  • the resulting textile structure being a laminate has a limited elasticity.
  • the textile structure being a laminate has an elongation of at most 60%, more preferably at most 40%, even more preferably at most 25% or even at most 10% in machine direction.
  • the laminate has an elongation of at most 150%, more preferably at most 100%, even more preferably at most 80% in the direction perpendicular to machine direction.
  • the elongation of the laminate is determined in accordance with EN 29073- 3:1992.
  • the laminate preferably has an elongation of at most 60%, more preferably at most 40% in machine direction.
  • the laminate has an elongation of at most 150%, more preferably at most 100% in the direction perpendicular to machine direction.
  • the laminate preferably has an elongation of at least 25%, more preferably at most 10% in machine direction.
  • the laminate has an elongation of at most 100%, more preferably at most 80% in the direction perpendicular to machine direction.
  • the strips may have a width in the range of 0.05 to 10 mm, preferably 0.1 to 5 mm, more preferably 0.5 to 3 mm.
  • the strips may extend continuously along the length of the laminate, with fibrils branching away from one continuous strip towards an adjacent continuous strip.
  • the number of fibrils extending per cm of strip away to the adjacent strip may for example be up to about 100, up to about 40 or up to about 20. In one embodiment the number of fibrils extending per cm of strip away to the adjacent strip is in the range of 0.5 to 10.
  • the fibrils can have a width of, e.g., about 100 nm up to about 1 mm or more.
  • the strips have a greater width than the fibrils, in particular in the embodiment where the strips extend continuously along the length of the laminate.
  • the strips and the fibrils may have the same width.
  • the thickness of the strips and the fibrils is similar or the same and may be in the range of 25 to 300 pm, preferably 30 to 250 pm, more preferably 50 to 100 pm.
  • the thickness of the strips and the fibrils is the same because they originate from a tape or film having an even thickness.
  • Figure 1 shows a schematic view of one embodiment of the layer of uniaxially oriented material comprising a plurality of strips interconnected by fibrils.
  • the continuously extending strips (1) are substantially parallel and connected by the fibrils (2).
  • the arrow indicates the orientation (uniaxial orientation) of the layer and the material (machine direction).
  • Figure 2 shows a schematic view of another embodiment of the layer of uniaxially oriented material comprising a plurality of strips interconnected by fibrils.
  • short strips (1) are arranged parallel to each other and along the length direction of the laminate.
  • a short strip is connected at each end by two fibrils (2) to two other short strips which are off-set but have the same orientation.
  • the strips and layers form a symmetric, rhombic-like pattern.
  • the length of the short strips may vary, but may generally be in the range of 0.3 to 5 cm, preferably in the range of 0.5 to 2.5 cm.
  • the arrow indicates the uniaxial orientation of the layer and the material and the strips.
  • the layer of uniaxially oriented material comprises a plurality of short strips, each strip having opposite ends and a length, preferably in the range of 0.3 to 5 cm, wherein each end of a strip is connected to the ends of at least two other strips by at least two fibrils.
  • the minimum distance between adjacent short strips (indicated as strips 1a in Figure 2) of the layer of uniaxially oriented material may be in the range of 0.1 to 30 mm, preferably 2 to 20 mm, more preferably 5 to 12 mm.
  • the minimum distance between the end of short strips being arranged along the same line in machine direction is preferably in the range of 10 to 100 mm.
  • this pattern may result in higher tensile strength (dry and wet breaking strength, determined according to EN 290730-3:1992 or according to EN 13934-1) and higher bursting strength (dry and wet bursting resistance, determined according to EN ISO 13938- 1:2019) in particular in the uniaxial direction (machine direction) compared to the embodiment wherein the continuous strips are interconnected by fibrils (as described above and shown in Figure 1).
  • the strips and fibrils may also be arranged in other regular patterns, wherein the strips (short strips or continuous strips) preferably are arranged substantially parallel to each other and are connected with other strips or with each other by fibrils.
  • the strips do not overlap in the layer of uniaxially oriented material but are spaced apart.
  • the fibrils do not overlap in the layer of uniaxially oriented material but are spaced apart.
  • strips and fibrils do not overlap, but are spaced apart, i.e. spread.
  • the minimum distance is equal to the length of a line perpendicular to the orientation of the strips at a point where the end of one strip (in uniaxial orientation) and the beginning of the adjacent strip are closest along the length of the strips and may be measured by any suitable means, e.g. by a ruler.
  • the layer of uniaxially oriented material has a weight per unit area in the range of 1 to 50 g/m 2 , more preferably in the range of 2 to 20 g/m 2 , even more preferably in the range of 3 to 10 g/m 2
  • the uniaxially oriented material may comprise or consist of polyethylene, in particular ultra-high molecular weight polyethylene (UHMWPE).
  • UHMWPE ultra-high molecular weight polyethylene
  • the UHMWPE may be linear or branched. Linear UHMWPE has less than 1 side chain per 100 carbon atoms, e.g., less than 1 side chain per 300 carbon atoms, a side chain or branch generally containing at least 10 carbon atoms. Side chains can be measured by FTIR on a 2 mm thick compression moulded film.
  • Linear UHMWPE may further contain up to 5 mol% of one or more other copolymerisable alkenes, such as propene, butene, pentene, 4-methylpentene, and/or octene.
  • the linear UHMWPE can be of high molar mass with an intrinsic viscosity (IV, as determined on solutions in decalin at 135°C) of at least 4 dl/g; e.g., of at least 8 dl/g, e.g., of at least 10 dl/g.
  • the ultra-high molecular weight polyethylene may for example have a weight average molecular weight (Mw) of at least 500000 gram/mol in particular between 1 *10 6 gram/mole and 1 *10 8 gram/mol.
  • the UHMWPE has a number average molecular weight (Mn) of at least 2.0*10 5 g/mol.
  • the Mn may be at least 5.0*10 5 g/mol, more in particular at least 8.0*10 5 g/mol, or even at least 1.0 million g/mol, or even at least 1.2 million gram/mol.
  • the use of a polymer with a relatively high Mw has the advantage of a relatively high strength; the use of the polymer with a relatively high Mn has the advantage that it contains a relatively low amount of low- molecular weight polyethylene, and as it is believed that the properties of the tape derive from the high molecular weight molecules the presence of fewer low-molecular weight molecules will lead to a tape with better properties.
  • the use of a polymer with a relatively high Mw in combination with a relatively high Mn may be particularly preferred.
  • the Mn and Mw may be determined as is described in WO2010/079172. Reference may also be made to S. Talebi et al. in Macromolecules 2010, Vol. 43, pages 2780- 2788.
  • the tapes are based on disentangled PE, e.g., as described in WO 2009/007045 and WO2010/079172.
  • Tapes of uniaxially oriented UHMWPE may be prepared by drawing films. Films may be prepared by compacting a UHMWPE powder at a temperature below its melting point and by rolling and stretching the resulting polymer. An example of such a process is disclosed in US 5,578,373. Alternatively, UHMWPE powder can be fed to an extruder, extruding a film at a temperature above the melting point. The UHMWPE films can then be drawn or stretched in one or more consecutive steps to obtain uniaxially oriented tapes. These tapes may subsequently be split to obtain the layer of uniaxially oriented material comprising a plurality of strips interconnected by fibrils.
  • the tapes from which the layer of uniaxially oriented material is prepared have a tensile strength of at least 2.0 GPa, determined in accordance with ASTM D882- 00.
  • the tapes may have a tensile strength of at least 2.5 GPa, in particular at least 3.0 GPa, more in particular at least 3.5 GPa. Also tapes with a tensile strength of at least 4 GPa may be used.
  • the tensile energy to break of the tapes from which the layer of uniaxially oriented material is prepared is least 15 J/g, more preferably at least 20 J/g, in particular at least 30 J/g, more in particular at least 40 J/g.
  • the tensile energy to break is determined in accordance with ASTM D882-00 using a strain rate of 50%/m in. It is calculated by integrating the energy per unit mass under the stress-strain curve.
  • the tapes from which the layer of uniaxially oriented material is prepared have a modulus of at least 80 GPa, in particular of at least 100, more in particular at least 120 GPa or even a modulus of at least 140 GPa, or at least 150 GPa.
  • the modulus is determined in accordance with ASTM D822-00.
  • the textile structure also comprises a nonwoven fabric comprising fibers.
  • the nonwoven fabric provides an improved tactile feel and comfortable textile properties to the textile structure.
  • the nonwoven fabric also improves the contact (non-stickyness) between the regular clothing worn beneath and the protective clothing.
  • the nonwoven fabric may be a carded, air laid, wet laid, meltblown, flash-spun, electrospun, spunbond or spunlaced nonwoven fabric comprising randomly oriented fibers.
  • the nonwoven fabric may be produced by a combination of the above mentioned techniques.
  • the fibers of the nonwoven fabric may comprise a polymer selected from polyester (e.g. polyethylene terephthalate), polyamide, viscose, acrylic, modacrylic, polylactic acid, polypropylene, cotton, rayon, para-aramid, meta- aramid, flax, cellulose (e.g. Lyocell®) or combinations thereof.
  • the nonwoven fabric has a weight per unit area in the range of 7.5 to 80 g/m 2 , preferably 10 to 50 g/m 2 , more preferably in the range of 10 to 25 g/m 2 or in the range of 25 to 60 g/m 2 .
  • the textile structure preferably has a thickness of at most 0.4 mm, preferably in the range of 0.15 to 0.2 mm.
  • the textile structure may be very light-weight (preferably of at most 100 g/m 2 , more preferably in the range of 40 to 80 g/m 2 ) and flexible.
  • Figure 3 provides a schematic representation of a cross section of an embodiment of the textile structure with the polymer layer (1) and nonwoven fabric (3) on the outsides and the layer of uniaxially oriented material (2) in between.
  • the order of the three layers may be varied.
  • the order is as represented in Figure 3 such that the layer of uniaxially oriented material is arranged between the polymer layer and the nonwoven fabric.
  • the polymer layer is arranged between the layer of uniaxially oriented material and the nonwoven fabric.
  • the nonwoven fabric will usually be the innermost layer and oriented towards the wearer of the article of clothing.
  • the textile structure and/or article of clothing may comprise further layers.
  • the textile structure comprises or consists of a polymer film comprising or consisting of polyethylene, a layer of uniaxially oriented material comprising or consisting of UFIMWPE and a nonwoven fabric.
  • the strips (1 ) in the layer of uniaxially oriented material are oriented substantially parallel and have a minimum distance in the range of 0.5 to 2.5 cm, with 0.5 to 3 fibrils (2) extending per cm of strip to the adjacent strip(s).
  • the textile structure comprises or consists of a polymer film comprising or consisting of polyethylene, a layer of uniaxially oriented material comprising or consisting of UHMWPE and a nonwoven fabric, wherein the layer of uniaxially oriented material comprising a plurality of strips interconnected by fibrils comprises short strips (1) arranged parallel to each other and along the length direction of the laminate. Each short strip is connected at each end by two fibrils (2) to two other short strips which are off-set but have the same orientation. The strips and layers form a symmetric, rhombic-like pattern.
  • the length of the short strips may vary, but may generally be in the range of 0.3 to 5 cm, preferably in the range of 0.5 to 2.5 cm.
  • the textile structure and articles of clothing comprising the textile structure fulfill at least the performance requirements of British Standard BS EN13034:2005 for protective clothing offering limited protective performance against liquid chemicals.
  • the textile structure has an abrasion resistance of at least 10 number of cycles determined in accordance with EN ISO 12947-2 or EN 530:2011 -method 2, preferably at least 30 number of cycles, more preferably at least 40 number of cycles, even more preferably at least 100 number of cycles.
  • the textile structure has a trapezoid tear resistance of at least 10 N determined in accordance with EN ISO 9073-4 as mentioned in BS EN13034:2005, preferably at least 30, more preferably at least 40 N (in both directions of the textile structure).
  • the textile structure has a tensile strength of at least 30 N, preferably at least 60 N determined in accordance with EN ISO 13934-1.
  • an article of clothing made from the textile structure has a tensile strength in wet and dry state of at least 20 N determined in accordance with EN 29073-3, preferably at least 60 N (in both directions of the textile structure or the article of clothing).
  • the textile structure has a bursting strength of at least 40 kPa in the dry and wet stage, preferably of at least 60 kPa, more preferably of at least 150 kPa in the dry and wet stage determined according to EN ISO 13938-1.
  • the textile structure has a puncture resistance of at least 5 N, more preferably of at least 10 N determined in accordance with EN 863.
  • the textile structure has a liquid repellency equaling a repellency index of at least 70%, preferably at least 80%, more preferably at least 90% with regard to exposure by sulfuric acid (concentration of 30%), sodium hydroxide (concentration of 10%), o-xylene and 1 -butanol determined in accordance with EN ISO 6530.
  • the textile structure has a resistance to penetration by liquids equaling a penetration index of at most 10%, preferably at most 5%, more preferably at most 1% with regard to exposure by sulfuric acid (concentration of 30%), sodium hydroxide (concentration of 10%), o-xylene and 1 -butanol determined in accordance with EN ISO 6530.
  • the textile structure has a resistance to liquid penetration according to EN ISO 811 of at least 20 cm, preferably of at least 100 cm water (water column), more preferably at least 200 cm water (water column).
  • the textile structure has a compression folding (Schildknecht) flex cracking resistance of at least 500 numbers of cycles, preferably of at least 8000 cycles, more preferably of at least 50.000 cycles in accordance with EN ISO 7854-method B.
  • a compression folding (Schildknecht) flex cracking resistance of at least 500 numbers of cycles, preferably of at least 8000 cycles, more preferably of at least 50.000 cycles in accordance with EN ISO 7854-method B.
  • the textile structure has a resistance to penetration by contaminated liquids under hydrostatic pressure of at least 0 kPa, preferably at least 1.75 kPa, more preferably at least 14 kPa, most preferably at least 20 kPa in accordance with ISO/FDIS 16603 and ISO/FDIS 16604.
  • the textile structure has a resistance to penetration by infective agents due to mechanical contact with substances containing contaminated liquids for a duration of at least 15 minutes, preferably at least between 15 and 30 minutes, tested according to 4.1.4.2 in EN14126:2003.
  • the textile structure has a resistance to penetration by liquid aerosols of a penetration ratio (without/with tested material, log scale) of at least 1, preferably at least 2 or at least 3, most preferably of at least 5 tested according to ISO/DIS 22611.
  • a penetration ratio without/with tested material, log scale
  • the textile structure has a resistance to penetration by contaminated solid particles equaling a penetration ratio (with/without tested material, log scale) of at most 3, preferably at 2, most preferably at most 1, tested according to ISO/DIS 22612.
  • the textile structure has a resistance to microbial penetration in the wet stage of at least 2 IB, preferably at least 6 IB determined according to EN ISO 22610.
  • the textile structure has a particle release property of at most 4 logio (lint count) determined according to EN ISO 9073-10.
  • Articles comprising the textile structure e.g. protective clothing, drapes or other materials
  • the textile structure e.g. protective clothing, drapes or other materials
  • the invention also pertains to a method to manufacture the textile structure comprising:
  • the layer of uniaxially oriented material when forming the stack, is situated between the polymer layer and the nonwoven fabric. In another embodiment, when forming the stack, the polymer layer is situated between the layer of uniaxially oriented material and the nonwoven fabric.
  • the nonwoven fabric will be an outer layer in the stack with the side of the nonwoven fabric with the adhesive oriented towards the adjacent layer in the stack.
  • the pressure is preferably in the range of 20 to 100 N/cm 2 , more preferably 30 to 50 N/cm 2 .
  • the temperature during the compacting step is below the melting temperature of the polymer layer and below the melting temperature of the layer of uniaxially oriented material.
  • the temperature during compaction is close to the temperature at which the polymer layer becomes adhesive (sticky), but is not yet molten.
  • the temperature during compacting is in the range of 90 to 155°C, more preferably in the range of 110 to 135°C.
  • the temperature is preferably in the range of 90 to 110°C
  • the temperature is preferably in the range of 115 to 125°C
  • the temperature is preferably in the range of 125 to 150°C.
  • the adhesive (or glue) for attaching the nonwoven fabric may be applied to the nonwoven fabric and/or to the adjacent layer in the stack (e.g. the layer of uniaxially oriented material).
  • the adhesive may be applied in the form of hotmelt, scatter coating, dot coating, spots of adhesive, as adhesive web (e.g. non-woven web) or melt-foil/ film.
  • the adhesive may be selected from any known adhesive system, preferably from a polyolefin, e.g. polyethylene, polypropylene or its copolymers, and ethyl vinyl acetate.
  • adhesive may be used to join other layers in the textile structure.
  • the stacking of the different layers may occur by first combining the nonwoven fabric and the layer of uniaxially oriented material with the adhesive and subsequently adding the polymer layer.
  • the polymer layer and the layer of uniaxially oriented material are combined first and subsequently the nonwoven fabric is added to the stack.
  • all layers are simultaneously stacked and fed into a laminating device. Subsequently, the textile structure is produced by laminating the layers, i.e. by applying pressure and increased temperature.
  • the invention also pertains to an article of clothing, a drape or a packaging material comprising the laminated textile structure.
  • Such article of clothing may be a medical protective clothing, a chemical protective clothing, a mattress cover, or biological protective clothing to protect against medical, chemical and biological hazards, such as microorganisms, (toxic) chemicals or toxic plants.
  • Medical protective clothing may be used for surgery and to prevent infections in patient contact.
  • the article of clothing may also be used as protective clothing for industrial workers, e.g. in the mining industry, in the oil and gas industry, in the protection against radioactive hazards, in cleanroom environments, in the food industry, in agriculture, in painting work and pharmaceutical production environments.
  • the polymer layer forms the outer side of the textile structure and is oriented away from the wearer.
  • the layer of uniaxially oriented material forms the outer side of the article of clothing or an additional layer (e.g. a protective layer if the textile structure comprises a polymer membrane).
  • the nonwoven fabric preferably is usually oriented towards the wearer of the article of clothing.
  • the nonwoven fabric is the innermost layer of the article of clothing.
  • the article of clothing may be selected from a suit, apron, coverall, coat, gown, head cap, boot cover, uniforms, gloves, arm sleeve and facial protection.
  • the textile structure may also be used for protective drapes and as medical, biological or chemical packaging material.
  • Protective clothing articles, drapes and packaging material incorporating the textile structure may be for one-time use or few-times usage, which may also be referred to as disposable articles, in particular disposable articles of clothing.
  • the textile structure and the articles comprising the textile structure are also suitable for re-use and may be washable.
  • Articles of clothing comprising the textile structure wherein the polymer layer is a polymer membrane are especially suitable for re-use.
  • the textile structure may be used for construction materials (e.g. as barrier material between different layers, in particular as moisture barrier for insulation materials), for sporting materials (e.g. as sail cloth), for composites, and for agricultural materials (e.g. as foil for crop protection, greenhouses and as basis for artificial culturing substrates).
  • construction materials e.g. as barrier material between different layers, in particular as moisture barrier for insulation materials
  • sporting materials e.g. as sail cloth
  • composites e.g. as composites
  • agricultural materials e.g. as foil for crop protection, greenhouses and as basis for artificial culturing substrates.
  • Example 1 The invention is further illustrated by the following, non-limiting example.
  • Example 1 The invention is further illustrated by the following, non-limiting example.
  • an Endumax® TA23 film having a width of 133 mm is unwound and slit by passing it over a split device (octagonal bar with sharpened edges) rotating at a speed of 8.4 m/m in.
  • the split film is taken up by rubber coated duo rollers and spread to a width of 1 .4 m, by using a curved spreader bar the film is further spread to a final width of 1 .7 m.
  • the distance between the continuous strips is 22 mm, with 2 fibrils per cm extending from a strip to the adjacent strip.
  • the strips and fibrils are arranged as shown in Figure 1 .
  • a HDPE foil (areal weight 7 g/m 2 ) is used as polymer film and a polyethylene terephthalate (PET) nonwoven fabric (areal weight 65 g/m 2 ) is used as nonwoven fabric.
  • PET polyethylene terephthalate
  • Both layers are continuously unwound and stacked such that the three layers are arranged in the following order (top to bottom): PET nonwoven fabric, split and spread Endumax® layer as uniaxially oriented layer, HDPE foil as polymer layer.
  • the belt speed is 2.85 m/min.
  • the final laminate has a thickness of 250 micron, a weight of 74.1 g/m 2 and an average strength in machine direction (0) of 159.6 N and in cross direction (perpendicular to machine direction) of 92.5 N.
  • the machine direction corresponds to the orientation of the uniaxially oriented material.
  • the strength was determined in accordance with EN ISO 13934-1 , in dry state.
  • an Endumax® TA23 film having a width of 133 mm is unwound and slit by passing it over a split device (round bar with pins) rotating at a speed of 28 m/m in.
  • the split film is taken up by rubber coated duo rollers followed by spreading to a width of 1 .7 m.
  • the distance between the ends of short strips being arranged along the same line in machine direction is 52 mm
  • the distance between adjacent short strips is 14 mm
  • the width of the strips is 1 mm.
  • a HDPE foil (areal weight 7 g/m 2 ) is used as polymer film and a polyethylene terephthalate (PET) nonwoven fabric (areal weight 40 g/m 2 ) is used as nonwoven fabric.
  • LDPE scatter coating is applied to the nonwoven fabric as adhesive (10 g/m 2 ).
  • Both layers are continuously unwound and stacked such that the three layers are arranged in the following order (top to bottom): PET nonwoven fabric, split and spread Endumax® layer as uniaxially oriented layer, HDPE foil as polymer layer.
  • the stacked layers are laid down on the extended lower belt of a flatbed lamination machine (Meyer, type KFK- EL).
  • the stack passes through three heating zones set to respectively 115°C, 130°C and 135°C (in total 2300 mm length), followed by calendering and passage through a cooling zone having a temperature of 20°C (having a length of 1150 mm).
  • the belt speed is 15 m/min.
  • the final laminate has a thickness of 250 micron, a weight of 65 g/m 2 and an average strength in machine direction of 270 N/50mm and in cross direction (perpendicular to machine direction) of 68 N/50mm.
  • the strength was determined in accordance with EN ISO 13934-1 , in dry state.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne une structure textile qui est un stratifié et comprend une couche polymère choisie parmi un film polymère et une membrane polymère, une couche de matériau à orientation uniaxiale comprenant une pluralité de bandes interconnectées par des fibrilles, et un tissu non tissé comprenant des fibres. L'invention concerne également un procédé de fabrication d'une telle structure textile et des articles de vêtement, en particulier des vêtements de protection médicale, comprenant ladite structure textile.
PCT/EP2021/065035 2020-06-08 2021-06-04 Structure textile WO2021249890A1 (fr)

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EP20178808.0 2020-06-08

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629047A (en) 1970-02-02 1971-12-21 Hercules Inc Nonwoven fabric
US3985599A (en) * 1971-10-06 1976-10-12 Pierre Lepoutre Slit film
US5578373A (en) 1990-11-01 1996-11-26 Nippon Oil Co., Ltd. Split polyethylene stretched material and process for producing the same
WO2009007045A1 (fr) 2007-07-09 2009-01-15 Teijin Aramid B.V. Film de polyéthylène de haute résistance à la traction et à énergie de rupture élevée par traction
WO2010079172A1 (fr) 2009-01-09 2010-07-15 Teijin Aramid B.V. Film de polyéthylène ayant une résistance à la traction élevée et une énergie de rupture par traction élevée
EP3059080A1 (fr) * 2013-10-18 2016-08-24 JX Nippon Oil & Energy Corporation Non-tissé et stratifié de renforcement
WO2017151096A1 (fr) 2016-02-29 2017-09-08 Kimberly-Clark Worldwide, Inc. Appareil de séchage à passage d'air et procédés de fabrication
WO2017151086A1 (fr) * 2016-02-29 2017-09-08 Kimberly-Clark Worldwide, Inc. Élastiques à fils et film liés non étirés
WO2017148628A1 (fr) 2016-03-03 2017-09-08 Teijin Aramid B.V. Procédé et dispositif pour diviser une bande

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629047A (en) 1970-02-02 1971-12-21 Hercules Inc Nonwoven fabric
US3985599A (en) * 1971-10-06 1976-10-12 Pierre Lepoutre Slit film
US5578373A (en) 1990-11-01 1996-11-26 Nippon Oil Co., Ltd. Split polyethylene stretched material and process for producing the same
WO2009007045A1 (fr) 2007-07-09 2009-01-15 Teijin Aramid B.V. Film de polyéthylène de haute résistance à la traction et à énergie de rupture élevée par traction
WO2010079172A1 (fr) 2009-01-09 2010-07-15 Teijin Aramid B.V. Film de polyéthylène ayant une résistance à la traction élevée et une énergie de rupture par traction élevée
EP3059080A1 (fr) * 2013-10-18 2016-08-24 JX Nippon Oil & Energy Corporation Non-tissé et stratifié de renforcement
WO2017151096A1 (fr) 2016-02-29 2017-09-08 Kimberly-Clark Worldwide, Inc. Appareil de séchage à passage d'air et procédés de fabrication
WO2017151086A1 (fr) * 2016-02-29 2017-09-08 Kimberly-Clark Worldwide, Inc. Élastiques à fils et film liés non étirés
WO2017148628A1 (fr) 2016-03-03 2017-09-08 Teijin Aramid B.V. Procédé et dispositif pour diviser une bande

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
S. TALEBI ET AL., MACROMOLECULES, vol. 43, 2010, pages 2780 - 2788

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