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
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
• • 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
  • A41D31/10—Impermeable to liquids, e.g. waterproof; Liquid-repellent
  • A41D31/102—Waterproof and breathable
• • 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
  • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
  • B32B27/285—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyethers
• • 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
  • B32B5/08—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
  • 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
  • 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
  • B32B2262/0292—Polyurethane 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
  • B32B2262/12—Conjugate fibres, e.g. core/sheath or side-by-side
• • 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
  • B32B2274/00—Thermoplastic elastomer material
• • 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
  • B32B2307/70—Other properties
  • B32B2307/724—Permeability to gases, adsorption
• • 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
  • B32B2307/70—Other properties
  • B32B2307/726—Permeability to liquids, absorption
  • B32B2307/7265—Non-permeable
• • 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
• • 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
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
• • 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
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
  • Y10T428/2495—Thickness [relative or absolute]
• • 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
  • Y10T428/249921—Web or sheet containing structurally defined element or component
  • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
  • Y10T428/249981—Plural void-containing components
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
  • Y10T442/184—Nonwoven scrim
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
  • Y10T442/3854—Woven fabric with a preformed polymeric film or sheet
  • Y10T442/3862—Ester condensation polymer sheet or film [e.g., polyethylene terephthalate, etc.]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
  • Y10T442/3854—Woven fabric with a preformed polymeric film or sheet
  • Y10T442/3894—Amide condensation polymer sheet or film [e.g., nylon 6, etc.]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/40—Knit fabric [i.e., knit strand or strip material]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
  • Y10T442/674—Nonwoven fabric with a preformed polymeric film or sheet
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
  • Y10T442/674—Nonwoven fabric with a preformed polymeric film or sheet
  • Y10T442/675—Ester condensation polymer sheet or film [e.g., polyethylene terephthalate, etc.]

Definitions

• the invention relates to a waterproof, water vapor-permeable multi-layer membrane having at least a first and a second layer, wherein all layers consist of a thermoplastic polymer from the group of polyether esters, the group of polyetheramides or the group of polyether urethanes and are interconnected.
• Such membranes are known, for example, from EP 1 264 684 A1.
• the first layer is first formed by coating a carrier with a solution containing the thermoplastic polymer.
• the second layer of the membrane is produced by coating the first layer.
• the water vapor permeability required for the multi-layer membrane is achieved by adding a compatible hydrophilic plasticizer to the polymer for the second layer before it is used to coat the first layer.
• either the same or similar polymers are to be used for adjacent layers.
• the object of the present invention is to provide a further water-tight, water vapor permeable multilayer membrane.
• thermoplastic polymer from the group of polyether esters, the group of polyetheramides or the group of polyether urethanes and are connected to each other, that juxtaposed layers consist of thermoplastic polymers of different groups.
• the multilayer membrane according to the invention can be prepared by all known processes, as are also listed in EP 1 264 684 A1 ([0082]), it has turned out to be particularly advantageous if the multilayer membrane is produced such that it can be ejected the polymer provided extrusion die all provided layers of the Membrane are extruded together from the melt.
• the desired water vapor permeability can be achieved in a rather simple manner by appropriate selection of the polymers within the given group and also by a corresponding adjustment of the thicknesses of the individual layers.
• the devices suitable for this type of production of multilayer membranes are well known to the person skilled in the art.
• an extrusion die made by Egan Davis known under the name "Pro Pak Conical Die” can be used as the extrusion die.
• the melt of the first layer is applied to the wall of the nozzle and transported upward by pressure, after which the melt flowing another melt for the second layer, and optionally applied to these further melts, which then together from the extruded at the end of the wall existing annular gap.
• the layer thickness of the individual layers of the multilayer membrane can be influenced by appropriate adjustment of the flow rates of the individual melts and the stretching in the longitudinal and transverse directions carried out after emerging from the nozzle. It may also be expedient to extrude a carrier layer, for example of polyethylene, as the innermost and / or outermost layer, and to remove it again after completion of the membrane in order to avoid damage to the membrane.
• the erfindungsgsdorfe membrane preferably contains no plasticizer, so it contains only the conventional additives for membranes such as inorganic particles, pigments, thermal and / or oxidative stabilizers, UV stabilizers, polyolefins and others and / or antiblocking agents to sticking when winding the membrane avoid. As a rule, not more than 15% by weight, based on the total weight, of these additives should be present in the membrane.
• the membrane of the invention is characterized in particular by the fact that it has a water vapor transmission rate (WVTR), measured according to ASTM E 96-95, Procedure BW, water temperature 3O 0 C, having h 3000-65000 g / m 2/24 h.
• WVTR water vapor transmission rate
• the membrane of the invention has a water vapor transmission rate (WVTR), measured according to ASTM E 96 - 95, Procedure B, water temperature 30 0 C, h 200-5000 g / m 2/24 h.
• WVTR water vapor transmission rate
• the membranes of the invention are further characterized by a total thickness of 2 to 100 microns, preferably from 5 to 50 microns, wherein the individual layers have the same thickness, but preferably different thickness.
• a total thickness of 2 to 100 microns preferably from 5 to 50 microns, wherein the individual layers have the same thickness, but preferably different thickness.
• the thicker layer can be selected from the group of polyether esters
• the thinner layer can be selected from the group of polyetheramides, whereby it is utilized that polyetheramides are generally more UV-resistant than polyetheresters, for which reason the combination of the polyetheramide layer for the Layer of a polyether ester is a protective layer, wherein it should be noted that for this purpose already a small thickness is sufficient. Also, in terms of resistance to some chemicals against which the polyether amide layer is resistant, such a protective layer can be used.
• this layer increases the weldability of the membrane.
• the membrane according to the invention preferably consists of two layers. Furthermore, membranes in which the layers have different water vapor permeabilities, have proven to be very good.
• the membrane of the invention is particularly suitable for the production of breathable clothing.
• clothing means all fabrics which are worn on the body. These include especially gloves, hats, hats and shoes.
• the membrane according to the invention is particularly suitable if it is also after 5 washes, preferably after 10 washes according to DIN EN ISO 6330: 2000 at 40 0 C or after 7 cleaning cycles, preferably after 12 cleaning cycles according to DIN EN ISO 3175 - 1: 1998 at least predominantly still interconnected. In particular, during washing it can be determined in most cases that delamination occurs only after 30 washes or more.
• Adjacent layers are then at least predominantly interconnected if 90% of the total area of the membrane has bonded layers and only 10% of the total area of the membrane has delaminated areas.
• the delaminated surfaces are recognized by the fact that a delamination is the turbidity of the membrane.
• the membranes according to the invention are connected to textile fabrics on one or both sides, usually by point or line-applied adhesive, resulting in laminates.
• textile fabrics for this purpose, fabrics, knits, knits, scrims, nonwovens, nets, but also knitted fabrics, and similar textile structures are suitable as textile fabrics.
• the membrane according to the invention is bonded to a textile fabric on one of its outer layers, the fabric being bonded directly to the membrane according to the invention without additional adhesive.
• the connection between the membrane of the invention and the textile fabric is realized exclusively by the membrane and / or the fibers of the textile fabric.
• the textile fabric consists of thermoplastic polymers with a proportion of low-melting polymers and a proportion of higher-melting polymers.
• the low-melting portion is also melted under heat, as the outer layer of the membrane according to the invention, wherein between the membrane and the low-melting portion of the fabric, a stable bond can be caused by physical or chemical means.
• This type of connection leads to excellent adhesion between the membrane and the textile fabric and thus causes a very high resistance to delamination.
• the membrane according to the invention in conjunction with a textile fabric is particularly suitable for the production of clothing, since the application of a textile fabric avoids direct contact of the membrane and the skin and thus improves the skin sensory properties of the garment according to the invention. An additional inner lining can therefore be dispensed with.
• a textile fabric which consists of thermoplastic polymers with a proportion of low-melting polymers and a proportion of higher-melting polymers can be obtained, for example, by using fibers which essentially consist of a copolymer having a low-melting and a higher-melting polymer fraction.
• This copolymer may be a block polymer or a graft polymer.
• Such textile fabrics in the form of a woven, knitted, knitted, laid, nonwoven, woven or grid or mesh are known to the person skilled in the art. They are offered, for example, by the company Hansel Verbundtechnik or by the company Protechnic and are usually used as an adhesive layer between two textile fabrics.
• the textile fabrics for connection with the membrane according to the invention advantageously consist of copolyester, copolyamide or copolyurethane.
• textile fabrics in the form of a woven, knitted, knitted, laid, nonwoven, woven or grid or lattice consisting essentially of bicomponent fibers of a low-melting polymer and a higher-melting polymer, in which case core / sheath bicomponent fibers have been found to be particularly suitable with a low melting coat and a higher melting core.
• suitable fabrics for bonding to the membrane of the present invention may include a proportion of fibers comprised of a low melting polymer and a proportion of fibers comprised of a refractory polymer.
• the membrane of the invention in particular processed into a laminate, is particularly well suited for the production of sleeping bags, tents or tarpaulins.
• thermoplastic polymers consisting essentially of the following components are suitable for the waterproof, water-vapor-permeable multi-layer membrane according to the present invention:
• Polybutylene terephthalate - 70 wt .-% polyethylene glycol (4000) - 30 wt.
• the extrusion die used was an extrusion die from Egan Davis, which became known as "Pro Pak Conical Die".
• a first polymer was melted and applied as a first layer to the wall of the nozzle and transported by pressure upwards. Thereafter, a second melt melted from a second polymer was applied to the flowing melt of the first polymer for the second layer on the first layer. Both melts were then extruded together from the annular gap formed at the end of the wall and having a diameter of about 60 cm. The resulting by cooling the melt two-layer membrane is inflated by air so far that the membrane had a circumference of about 4 m. This membrane was then laid flat and wound up.
• the water vapor permeability was measured according to ASTM E 96-1995 by both Procedure BW Inverted Cup Method and Procedure B. Upright Cup Method, in both cases the water temperature was set at 30 ° C. Both test methods were carried out both with the membrane layer consisting of the one polymer and with the membrane layer consisting of the other polymer to the water side.
• the first polymer used was a polyetherester and the second polymer a polyetheramide.
• the amounts of melt supplied were 40 kg / h of polyetherester and 54.5 kg / h of polyetheramide.
• the resulting membrane had a total thickness of 17 microns, wherein the layer of polyether ester had a thickness of 7 microns and the layer of polyether amide had a thickness of 10 microns.
• the polymers consisted essentially of the following components: Polyetherester: Polyetheramide:
• Polybutylene terephthalate 70 wt% Polyamide 6 - 60 wt% Polyethylene glycol (4000) - 30 wt% Polyethylene glycol (2000) - 20 wt%
• the water vapor permeability of the produced two-layer membrane had the following values:
• a melt of polyethylene was first supplied as carrier layer to the wall.
• This carrier layer was supplied as the first polymer polyetherurethane and as a second polymer polyetherester.
• the amounts of melt fed were 47.4 kg / h of polyetherurethane and 37.1 Kg / h of polyetherester.
• the resultant membrane had a total thickness of 15.5 microns after the polyethylene backing was stripped, with the polyether urethane layer having a thickness of 9 microns and the layer of polyether ester having a thickness of 6.5 microns.
• polyetherurethane polyetherester
• the water vapor permeability of the produced two-layer membrane had the following values:
• the membrane showed first delamination phenomena in less than 8% of the total area after 42 washes or after 51 cleaning cycles in the form of turbidity.
• Polyetheramide was used as the first polymer and polyether urethane as the second polymer.
• the amounts of melt supplied were 76.3 kg / h of polyetheramide and 36.9 kg / h of polyetherurethane.
• the resulting membrane had a total thickness of 21 microns, wherein the layer of polyether amide had a thickness of 14 microns and the layer of polyether urethane had a thickness of 7 microns.
• polyetheramide polyetherurethane
• the water vapor permeability of the produced two-layer membrane had the following values:
• the membrane showed first delamination phenomena in less than 9% of the total area after 45 washes or after 53 cleaning cycles.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Laminated Bodies (AREA)
• Separation Using Semi-Permeable Membranes (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (2)

Family

ID=38009724

Family Applications (1)

Country Status (7)

Families Citing this family (13)

Family Cites Families (8)

• 2006
  • 2006-12-21 CA CA 2634482 patent/CA2634482A1/en not_active Abandoned
  • 2006-12-21 CN CN200680049095XA patent/CN101346228B/zh not_active Expired - Fee Related
  • 2006-12-21 EP EP06829818.1A patent/EP1968791B1/de not_active Not-in-force
  • 2006-12-21 US US12/086,417 patent/US20090098352A1/en not_active Abandoned
  • 2006-12-21 JP JP2008546263A patent/JP2009521340A/ja active Pending
  • 2006-12-21 RU RU2008130522/04A patent/RU2008130522A/ru not_active Application Discontinuation
  • 2006-12-21 WO PCT/EP2006/012385 patent/WO2007073924A2/de not_active Ceased

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