EP1300508A2 - Verfahren zur Herstellung eines mikrofasrigen Vliesstoffes mit Filz-Aussehen und einer Flor-freien Oberfläche - Google Patents

Verfahren zur Herstellung eines mikrofasrigen Vliesstoffes mit Filz-Aussehen und einer Flor-freien Oberfläche Download PDF

Info

Publication number
EP1300508A2
EP1300508A2 EP02021712A EP02021712A EP1300508A2 EP 1300508 A2 EP1300508 A2 EP 1300508A2 EP 02021712 A EP02021712 A EP 02021712A EP 02021712 A EP02021712 A EP 02021712A EP 1300508 A2 EP1300508 A2 EP 1300508A2
Authority
EP
European Patent Office
Prior art keywords
woven fabric
woven
synthetic
appearance
leather
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02021712A
Other languages
English (en)
French (fr)
Inventor
Andrea Bellucci
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcantara SpA
Original Assignee
Alcantara SpA
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 Alcantara SpA filed Critical Alcantara SpA
Publication of EP1300508A2 publication Critical patent/EP1300508A2/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0004—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using ultra-fine two-component fibres, e.g. island/sea, or ultra-fine one component fibres (< 1 denier)
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes

Definitions

  • the present invention relates to new synthetic woven products, microfibrous non-woven fabric having the appearance and the characteristics of high quality textiles, called "cloth” and of the synthetic leathers with surface completely clear of nap, and the methods for the production of the same.
  • the present invention relates to synthetic microfibrous non-woven fabric, with a surface appearance recalling that of cloth and felt, completely lacking in nap and writing ability, that is without surface microfiber, but with a pleasing appearance and unique in its kind.
  • the present invention refers to a preparation process for said product analogous to the process for the production of non-woven microfibrous fabric of the suede-leather type.
  • a traditional production process is known, and is currently exploited commercially, for the production of microfibrous non-woven fabric of the suede-leather type, that is typically described in Italian Patents n. 823055, 839921, 858373, 873699, 905222, 921871 and in American patent US-A-3531368.
  • a fiber is prepared from two components, of the "islands in the sea” type, by feeding two polymers to a spinneret in such way that one (the “sea” component) completely surrounds the other constituted by several filaments that form the various "islands".
  • the "sea” component is generally constituted by polystirene (PST) or other polymers that have such spinning characteristics as to surround the microfibers of the "island” component and is, in addition, easy soluble in the usual organic solvents.
  • the “island” component is typically polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • a felt is prepared by means of agugliatura from the fiber thus obtained; the felt is impregnated with an aqueous polyvinyl alcohol solution (PVA), the "sea” component is dissolved in trichloroethylene (“trieline”), the felt is then impregnated with a polyurethane solution (PU) in dimethylformamide (DMF) and, finally, the PVA is eliminated.
  • PVA polyvinyl alcohol solution
  • PU polyurethane solution
  • DMF dimethylformamide
  • the product thus obtained is cut into two in the section, dyed in suitable jet of dye, and finished.
  • a simplified block diagram of the process described above is shown in the attached figure.
  • the product thus obtained has had good commercial success due to its appearance, and good textile characteristics, such as "hand", together with good mechanical properties
  • the end product has a relatively high cost, which could be justified by the class of the natural products with which it is found in competition, such as optimum quality suede leather.
  • synthetic products with the appearance of natural high-quality weaves, called "cloth” that, moreover, recall the felted appearance characteristic of leather and did not have the surface nap of the chamois leather described above but that, however, maintained the good textile and mechanical characteristics, at costs substantially lower than those of the synthetic suede leather mentioned above.
  • the material according to the present invention can be obtained by a process having the following stages:
  • the difference consists in the lack of a product surface emery polishing stage in the process according to the invention.
  • the elimination of the emery polishing stage beyond the economic advantages intrinsic to the elimination of an operating stage, involves considerable progress from the environmental point of view in favor of the process according to the invention.
  • the elimination of the emery polishing operation and disposal of resulting dust considerably improves the environmental aspect of the process and reduces the investment and/or operating costs of the system.
  • the process according to the invention requires, for equal area of end product, uses a quantity of starting materials that could be up to 50% less by weight.
  • a further advantage of the product and process according to the present invention derives from the fact that the equipment needed for the production of the synthetic suede leather according to the known technology and that according to the invention is substantially the same, with the exception of that required for the emery polishing. It is thus possible to switch from producing synthetic suede leather to producing the product according to the invention in little time, and without having to resort to particular know-how, simply by passing from the splitting stage to that of dyeing.
  • the preparation process of the product according to the invention can be carried out partially or totally in a clean way, using reagents or solvents described in the Application for Italian Patent MI2001 A000516 of the same applicant.
  • the aforementioned process leads to a microfibrous non-woven product, with surface characterized by the lack of microfiber emerging from the surface, thus without " writing ability", but with particular the "cloth” type appearance, pleasing to the eye, with good hand and physical-mechanical characteristics.
  • the "island” component could be polyethylene terphthalate or a modified polyester, cationic polyester, nylon or other type of polyamide, from polyethylene, polypropylene or other types of polyolefin
  • the “sea” components could be nylon or other polyamides, modified polyesters and, in a generalized manner, other spinnable polymers with the essential characteristic of being soluble in "ecologically clean” organic solvents, preferentially in acidic or alkaline aqueous solutions.
  • the ratio between the "island” component and the “sea” component used in the twin-component spinning fiber must be between 20/80 and 80/20.
  • the felt can be impregnated with polyurethane in dimethylformamide or dimethylacetamide solution, analogous to what happens in the conventional systems described above, or, preferably, with polyurethane in emulsion or aqueous dispersion. If the process with polyurethane in emulsion or aqueous dispersion is followed, it is necessary that the bond between the polyurethane or the felt and the same polyurethane, can resist the polyvinyl alcohol extraction. To this purpose, analogous to what happens for polyvinyl alcohol in the extraction of the "sea” component, it will be necessary to fix the polyurethane so that it can resist the treatment of the felt in order to extract the polyvinyl alcohol.
  • the polyurethane can be fixed by adding reticulating agents known to the art that are active, according to type, at ambient or relatively high temperatures (100°-120°C).
  • a twin-component fiber is spun through a spinneret well known to the experts and it allows a composite fiber to be obtained in which one of the polymers is arranged around the elementary fibers of the other polymer.
  • the fiber thus obtained is treated according to finishing methods known in the spinning technology of the; in particular the twin-component fiber, before being subjected to stretching, must be between 10 and 13 denier, or better still between 11 and 12.5 denier. Stretching is executed with stretching ratios that vary generally from 2.5 to 3.4, with the "island" component between 0.08 and 0.5 denier.
  • twin-component fiber consisting of polyethylene terephthalate as the "island” component and a modified polyester as "sea” component, soluble in an alkaline aqueous solution.
  • the apparent density of the felt must preferably be in the range 0.1 to 0.5 g/cm 3 , better if it is between 0.15 and 0,3 g/cm 3 , with a thickness of between 2 and 4 millimeter, with the aim of obtaining a final non-woven fabric with good softness.
  • the felt thus obtained is preferably impregnated with one aqueous polyvinyl alcohol solution (PVA), at a concentration of between 5% and 30%, preferably between 8% and 15%, and better still if between 10% and 13%, and at a temperature of between 60° and 90°C.
  • PVA polyvinyl alcohol solution
  • the "sea" component is extracted either with organic solvents (example: polystyrene is extracted with trichloroethylene) or aqueous means (example: modified polyester is extracted with water + NaOH solution).
  • the non-woven fabric from which the "sea" component has been extracted is impregnated with polyurethane in dimethylformamide solution or dispersed in aqueous emulsion, at room temperature, with a concentration varying between 10% and 20% and is fed onto the piece through suitable dosing rollers.
  • the polyols that constitute polyurethane (PU) can be of polyether type, polyester type and polyether-polyester type; the PU can be prepared using one or more such polyol types, that must have comprised a medium numerical molecular weight between 500 and 5000.
  • the diisocyanates used for the synthesis of the PU could be aliphatic or aromatic; chain extenders used, on the other hand, are generally molecules of low molecular weight, that possess two or more active hydrogens that react with the isocyanic groups.
  • the synthesis of the PU is generally begun by preparing the prepolymer with terminal isocyan groups preliminarily, until the desired molecular weight is attained.
  • a quantity of reticulating agent varying between 0.5% and 8% can be added to the aqueous polyurethane solution used for impregnation, with the aim of achieving the desired physical-mechanical and solvent resistance characteristics.
  • crosslinking agents which could be melamines, aziridines, carbodiimides, epoxides, zirconium compounds, or isocyan based, are active in the drying phase of the PU at a temperature that can varies from 110°C to 180°C.
  • the polyurethane resin impregnated into the non-woven fabric is thermofixed to the same by drying, or is preliminarily coagulated and then dried; as an example, in the case of anionic type PU, coagulation can be carried out in an acidic aqueous solution, or, for a cationic PU, in an alkaline aqueous solution.
  • coagulation can be carried out in an acidic aqueous solution, or, for a cationic PU, in an alkaline aqueous solution.
  • the phase of fixing the PU on the microfiber must happen in the least possible time, to avoid the migration of the PU onto the surface of the non-woven fabric, with consequent worsening of the appearance and the physical-chemical characteristics.
  • the PVA must be removed from the non-woven fabric and this is done in a vibro-washer with warm water, at a temperature of between 85° and 95°C.
  • the final piece is dried in warm air oven and subjected to the successive working phases of, respectively, cutting in two along the section, dyeing and the finishing.
  • the operating conditions of these productive stages reflect those used in the production of non-woven fabrics where organic solvents are used.
  • a fiber staple is prepared formed from microfibers of PET (polyethylene terphthalate) (0,13 to 0,15 denier) in a polystyrene matrix, with the following characteristics:
  • the fiber is formed from 57 parts by weight of PET and 43 parts by weight of PST. If observed in section, the fiber reveals the presence of 16 microfibers of PET embedded in the PST matrix.
  • a raw felt is prepared that is subjected to needle punching to form an needle punched felt with density 0.217 g/cc.
  • the agugliato felt is made to shrink in warm water at a temperature of 90°C to yield a density of 0.331 g/cc; this is then dipped in a 12% polyvinyl alcohol solution at a temperature of around 70°C and is then thermofixed in an oven at 150°C for 10 minutes.
  • the piece impregnated with PVA is dipped in trichloroethylene to dissolve the "sea" component.
  • the piece is impregnated with solution of PU in dimethylformamide at a concentration of about 12%.
  • the polyurethane is fixed to the microfibrous structure due to coagulation in water and dimethylformamide solution, then there is a drying of the piece phase.
  • the following phase involves the cutting into two parts in the direction of the thickness.
  • the material thus obtained is subjected to dyeing in jets with dispersed coloring, then subjected to traditional finishing treatments of the textile industry.
  • a fiber staple is prepared from microfibers formed of PET (polyethylene terphthalate) (0,13 to 0,15 denier) in a modified polyester matrix (TLAS), with the following characteristics:
  • the fiber is formed from 57 parts by weight of PET and 43 pmts by weight of TLAS. If observed in section, the fiber reveals the presence of 16 microfibers of PET embedded in the PST matrix.
  • a raw felt is prepared that is subjected to needle punching to form an needle punched felt with density 0.217 g/cc.
  • the agugliato felt is made to shrink in warm water at a temperature of 90°C to yield a density of 0.331 g/cc; this is then dipped in a 12% high saponification polyvinyl alcohol solution (H.S.PVA) at a temperature of about 70°C and is then thermofixed in an oven at 150°C for 30 minutes.
  • the piece impregnated with PVA is dipped in a 10% solution of NaOH at a temperature of 60°C to dissolve the "sea" component.
  • the piece is impregnated with a solution of PU in dimethylformamide at a concentration of about 12%.
  • the polyurethane is fixed to the microfibrous structure due to coagulation in water and dimethylformamide solution, followed by a drying of the piece phase.
  • the following phase involves the cutting into two parts in the direction of the thickness.
  • the material thus obtained is subjected to dyeing in jet with dispersed coloring, subjected to traditional finishing treatments of the textile industry.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
EP02021712A 2001-10-03 2002-09-25 Verfahren zur Herstellung eines mikrofasrigen Vliesstoffes mit Filz-Aussehen und einer Flor-freien Oberfläche Withdrawn EP1300508A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20012051 2001-10-03
IT2001MI002051A ITMI20012051A1 (it) 2001-10-03 2001-10-03 Processo per la produzione da un tessuto non tessuto microfibroso conaspetto feltrato e superficie caratterizzata da assenza di nappa

Publications (1)

Publication Number Publication Date
EP1300508A2 true EP1300508A2 (de) 2003-04-09

Family

ID=11448471

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02021712A Withdrawn EP1300508A2 (de) 2001-10-03 2002-09-25 Verfahren zur Herstellung eines mikrofasrigen Vliesstoffes mit Filz-Aussehen und einer Flor-freien Oberfläche

Country Status (2)

Country Link
EP (1) EP1300508A2 (de)
IT (1) ITMI20012051A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1707666A1 (de) 2005-03-30 2006-10-04 Carl Freudenberg KG Synthetisches Leder, Verfahren zu dessen Herstellung und dessen Verwendung
CN101608351B (zh) * 2009-07-03 2011-09-28 山东同大海岛新材料股份有限公司 一种熔融共混海岛纤维及其生产方法
CN101886315B (zh) * 2009-05-11 2012-01-11 浙江梅盛实业股份有限公司 高仿真麂皮面料的制造工艺
CN103890262A (zh) * 2012-01-17 2014-06-25 阿尔坎塔拉股份公司 微纤维产品及其制备覆盖物和外壳的用途
EP2886327A1 (de) 2013-12-22 2015-06-24 Eurotex GmbH Mikrofaser-Textilverbund

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1707666A1 (de) 2005-03-30 2006-10-04 Carl Freudenberg KG Synthetisches Leder, Verfahren zu dessen Herstellung und dessen Verwendung
DE102005014317A1 (de) * 2005-03-30 2006-10-05 Carl Freudenberg Kg Synthetisches Leder, Verfahren zu dessen Herstellung und dessen Verwendung
CN101886315B (zh) * 2009-05-11 2012-01-11 浙江梅盛实业股份有限公司 高仿真麂皮面料的制造工艺
CN101608351B (zh) * 2009-07-03 2011-09-28 山东同大海岛新材料股份有限公司 一种熔融共混海岛纤维及其生产方法
CN103890262A (zh) * 2012-01-17 2014-06-25 阿尔坎塔拉股份公司 微纤维产品及其制备覆盖物和外壳的用途
EP2886327A1 (de) 2013-12-22 2015-06-24 Eurotex GmbH Mikrofaser-Textilverbund

Also Published As

Publication number Publication date
ITMI20012051A0 (it) 2001-10-03
ITMI20012051A1 (it) 2003-04-03

Similar Documents

Publication Publication Date Title
EP1353006B1 (de) Verfahren zur Herstellung eines mikrofasrigen, wildlederähnlichen Vliesstoffes
US4342801A (en) Suede-like sheet material
US10400391B2 (en) Process for the preparation of a non-woven microfibrous suede-like synthetic fabric
US6274203B1 (en) Process for the production of artificial leather
CN112538764A (zh) 用阳离子染料染色过的立毛状人造革及其制造方法
KR101950421B1 (ko) 커버 및 케이스 제조용 마이크로섬유성 산물 및 이의 용도
US6921508B2 (en) Method for the production of microfibrous suede-finish non-woven fabric without using organic solvents
EP1300508A2 (de) Verfahren zur Herstellung eines mikrofasrigen Vliesstoffes mit Filz-Aussehen und einer Flor-freien Oberfläche
CN1316119C (zh) 微纤麂皮非织造布的生产工艺及相关方法
US4053546A (en) Method of making a leather-like sheet material by coagulating two polymers
EP3574139B1 (de) Mehrfaseriger mehrschichtiger verbundstoff für anwendungen im kraftfahrzeugsektor
EP1302587A2 (de) Verfahren zur Herstellung eines wildlederähnlichen Vlies- oder Gewebestoffes mit elastischer Mikrofaser
KR100475542B1 (ko) 초극세사 부직포 인공피혁의 제조방법
KR20020039598A (ko) 극세사 편성물을 이용한 스웨드조 인공피혁의 제조방법
KR100337990B1 (ko) 누박조인공피혁의제조방법
KR0182628B1 (ko) 인공피혁의 제조방법
JPH0124901B2 (de)
JPH07197383A (ja) 伸縮性合成皮革の製造方法
KR100274576B1 (ko) 와이핑용 부직포의 제조방법_
KR19990030818A (ko) 부직포 인공피혁의 제조방법
KR101184479B1 (ko) 인공피혁 및 그 제조방법
JPS5940948B2 (ja) スエ−ド調人工皮革の製造方法
KR19990079306A (ko) 인공피혁의 제조방법.
KR20170002057A (ko) 인공피혁 및 이의 제조방법

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20070403