Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
  • D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
  • D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
  • D06L1/12—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using aqueous solvents
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
  • D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
  • D06L1/12—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using aqueous solvents
  • D06L1/14—De-sizing
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
  • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
  • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
  • D06L4/40—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using enzymes
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
  • D06M16/003—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic with enzymes or microorganisms

Definitions

• the present invention relates to a composition, a process and methods of using aqueous solutions of water-soluble polymers, in particular polyvinylpyrrolidone (PVP) polymer in the pre-treatment of textiles comprising cellulosic fibres or a mixture of cellulosic fibres and non-cellulosic fibres.
• PVP polyvinylpyrrolidone
• the current general pre-treatment procedure for textiles comprising cellulosic fibers by Pad Steam application requires high amounts of caustic soda (NaOH) for scouring (25-50 g/l NaOH (solid)) and/or bleaching, i.e. saponification of natural cotton waxes and fatty substances.
• CaOH caustic soda
• Such high amounts of NaOH in combination with Pad Steam conditions are often harmful to the cellulosic fiber and can lead to reduced fabric strength, i.e. tensile and tear strength, and depolymerization of the cellulosic molecular chain, i.e. a chemically damaged fiber.
• One object of the present invention is solved according to a first aspect by a process for removing impurities from textiles comprising cellulosic fibres or a mixture of cellulosic fibres and non-cellulosic fibres, wherein the process comprises at least one pre-treatment procedure, wherein the pre-treatment procedure comprises at least one step selected from desizing, scouring and bleaching, characterized in that the pre-treatment procedure comprises contacting textiles comprising cellulosic fibres or a mixture of cellulosic fibres and non-cellulosic fibres with at least polyvinylpyrrolidone (PVP) polymer in at least one step.
• PVP polyvinylpyrrolidone
• the PVP polymer has an average molecular weight ranging from 50,000 to 500,000 g/mol, preferably ranging from 100,000 to 400,000 g/mol, further preferred ranging from 200,000 to 300,000 g/mol.
• PVP polymer different from PVP polymer
• PVA polyvinylalcohol
• polyacrylate homo- or copolymer polyalkyleneglycol homo- or copolymer, in particular polyethyleneglycol homo- or copolymer
• modified polyalkyleneglycol homo- or copolymer in particular modified polyethyleneglycol homo- or copolymer, in particular alkylpolyethyleneglycol homo- or copolymer, alkoxypolyethyleneglycol homo- or copolymer, acylpolyethyleneglycol homo- or copolymer
• polyvinylbutyral homo- or copolymer non-ionic or anionic modified polyesters; or non-ionic or anionic modified oligoesters
• modified polystyrene in particular low crosslinked polystyrene grafted with polyethylene glycol
• the pre-treatment procedure comprises a scouring-step which comprises the addition of at least one pectinolytic enzyme to remove pectic polysaccharides from cellulosic fibers, e.g. a pectate lyase.
• a saccharifying enzyme to break down starch size from cellulosic fibers e.g. an alpha-amylase is added.
• the scouring step is carried out at a pH between 5 and 10, or between 7 and 8, or at 7.25.
• the scouring step is carried out at a temperature between 50°C and 100°C, or between 70°C and 90°C, or at 80°C.
• polyvinylpyrrolidone polymer as an additive in the pre-treatment procedure for inhibiting crease and/or lay marks of cellulosic fibers and/or for improving liquor retention ability, whiteness, absorbency levels and/or tensile strength of cellulosic fibers is a second aspect of the invention.
• composition of the invention comprising: a pectinolytic enzyme and at least one water-soluble polymer.
• the pectinolytic enzyme is a pectate lyase.
• the at least one water-soluble polymer is selected from polyvinylpyrrolidone (PVP) homopolymer, polyvinylpyrrolidone copolymer, in particular a copolymer comprising monomers selected from vinylpyrrolidone and vinylalcohol or acrylamide or acrylic acid or methylmethyacrylate, or vinylacetate, or diallyldimethyl ammonium chloride (DADMAC) or mixtures thereof, wherein preferably the PVP homo- or copolymer has an average molecular weight of 50,000 to 500,000 g/mol, preferably of 100,000 to 400,000 g/mol, further preferred of 200,000 to 300,000 g/mol; pure or derivatised polyvinylalcohol (PVA) homo- or copolymer; polyacrylate homo- or copolymer; polyalkyleneglycol homo- or copolymer, in particular polyethyleneglycol homo- or copolymer; modified polyalkyleneglycol homo
• PVP polyvinylpyr
• composition further comprises at least one additive selected from the group of non-ionic or anionic detergent, sequestering agent, peroxide stabilizer, or saccharifying enzyme, preferably in form of alpha-amylase, or mixtures thereof.
• One object of the invention is solved according to a fourth aspect by a method according to the invention of increasing the effect of a pectinolytic enzyme, characterized by admixing said enzyme with at least one water-soluble polymer.
• the at least one water-soluble polymer is selected from polyvinylpyrrolidone (PVP) homopolymer, polyvinylpyrrolidone copolymer, in particular a copolymer comprising monomers selected from vinylpyrrolidone and vinylalcohol or acrylamide or acrylic acid or methylmethyacrylate, or vinylacetate, or diallyldimethyl ammonium chloride (DADMAC) or mixtures thereof, wherein preferably the PVP homo- or copolymer has an average molecular weight of 50,000 to 500,000 g/mol, preferably of 100,000 to 400,000 g/mol, further preferred of 200,000 to 300,000 g/mol; pure or derivatised polyvinylalcohol (PVA) homo- or copolymer; polyacrylate homo- or copolymer; polyalkyleneglycol homo- or copolymer, in particular polyethyleneglycol homo- or copolymer; modified polyalkylenegly
• PVP polyvinylpyrroli
• composition according to the invention in the pre-treatment of textiles comprising cellulosic fibres or a mixture of cellulosic fibres and synthetic fibres is a fifth aspect of the invention.
• the process according to the invention has the advantage that crease and lay marks are reduced, preferably inhibited during further processing of the textile, in particular during Pad Steam Processing in a steamer.
• Another advantage of the process according to the invention is that the liquor retention ability and liquor pick-up property of the textile comprising cellulosic fibers treated according to the process of the invention is improved.
• the dosage of NaOH, H 2 O 2 and detergent needed for scouring and/or bleaching can be reduced. This will result in a more economical processing and minimizes the danger of fiber damage since less bleaching chemicals are used.
• a further advantage of the process according to the invention is that the degree of whiteness and absorbency level after bleaching, in particular after Pad Steam Processing using H 2 O 2 , can be improved if the textile comprising cellulosic fibers is treated according to the process according to the invention.
• the process according to the invention as well as the respective composition, method and use of the composition according to the invention have the advantage that the activity of the pectinolytic enzyme is enhanced by the water-soluble polymer, preferably by polyvinylpyrrolidone polymer and thus, the scouring ability for textiles comprising cellulosic fibers, in particular the bio-scouring ability of the process and composition according to the invention is improved.
• the process according to the invention is a pre-treatment procedure for textiles comprising cellulosic fibers or a mixture of cellulosic fibers and synthetic fibers, wherein the process comprises contacting the textile with at least polyvinylpyrrolidone polymer (PVP polymer).
• PVP polymer polyvinylpyrrolidone polymer
• pre-treatment procedure or "pre-treating” as used in the context of the present invention encompasses all procedures carried out to improve wettability and absorbency, dye absorption capacity, cleanness of the textile (i.e. removal of impurities), to increase whiteness, removal of tension irregularities or material irregularities resulting e.g. from a previously conducted weaving process.
• Impurities contained in e.g. raw cotton from which textiles comprising cellulosic fibers can be made are, for example, natural associated impurities like hemicellulose, pectins, proteins and salts, or processing-related impurities like, for example, fatty substances, oils and waxes. It is therefore a feature of the pre-treatment procedure to remove said impurities from the cellulosic fiber by physical, chemical and biological processes in order to provide an even dye absorption capacity and to maximize the absorbency.
• the pre-treatment procedure can be distinguished from subsequently following finishing procedures like dyeing, printing or equipment (e.g. equipment with fire-retardant properties) of the textile e.g. by the use of the chemicals. For example, during the dyeing or printing a dye has to be used, whereas in the pre-treatment procedure no such chemical is used.
• the finishing procedures aim at leaving the chemicals, e.g. the dye on or at or within the textile comprising cellulosic fibers, whereas the pre-treatment procedure aims at providing textiles comprising cellulosic fibers satisfying the requirement of subsequently following finishing steps like dyeing, printing or equipment.
• the pre-treatment procedure can be conducted continuously, e.g. using the Pad Steam technology, semi-continuously, e.g. using the Cold Pad Batch technology; or discontinuously.
• the pre-treatment procedure comprises at least one step selected from desizing, scouring or bleaching.
• the pre-treatment can comprise further steps like rinsing steps.
• the pre-treatment procedure consists of three steps in the mentioned order: desizing, scouring and bleaching.
• the term "desizing” as used in the context of the present invention means the removal of sizing agents, in particular of natural sizing agents like starch or starch derivatives including protein-based starches, which are commonly employed during weaving.
• the removal of sizing agent can occur by degrading or solubilizing the sizing agent, in particular with the aid of at least one desizing agent.
• the desizing agent can be selected from saccharifying enzymes, hot water, surfactants, or other chemicals like sodium persulfate or hydrochloric acid.
• a saccharifying enzyme in particular an amylase is used either alone or in combination with at least a PVP polymer.
• saccharifying enzyme as used in the context of the present invention is to be understood as an enzyme which is capable of breaking down starch size on cellulosic fibers into soluble, in particular water-soluble compounds.
• the saccharifying enzyme can be derived from a natural source or from an alternative source including from recombinant technologies or from genetic or chemical modification.
• the saccharifying enyzyme can be a wild type enzyme or a mutant enzyme, including functional homologues of the saccharifying enzyme.
• Functional homologue refers to a saccharifying enzyme that differs in the amino acid sequence or the nucleic acid sequence encoding the amino acid sequence from a wild type enzyme but is still functionally active. On the protein level a functional homologue may contain one or more mutations comprising amino acid exchanges, insertions or deletions.
• the saccharifying enzyme may also be chemically or enzymatically modified.
• alpha-amylase is used as saccharifying enzyme.
• an alpha-amylase is used as saccharifying enzyme.
• the alpha-amylase is used in a liquid formulation.
• a liquid formulation is known under the tradenames Bactosol ® HPA liq. from Archroma or Optisise ® NEXT from Genencor ® /DuPont (CAS-No. 9000-90-2).
• the desizing step can be carried out at pH value in the range between 5 to 10, or between 6 to 9, or between 7 to 8, or at 7. Further, the desizing step can be carried out at a temperature range of between 50°C to 100°C, or between 70°C to 90°C, or at 80°C.
• the term "scouring" as used in the context of the present invention is to be understood as the removal of further impurities, in particular of naturally occurring waxes or fatty substances or pectic polysaccharides.
• pectic polysaccharides as used in the context of the present invention is to be understood as polysaccharides that are rich in galacturonic acid.
• Pectic polysaccharides include, but are not limited to pectins, pectinates, pectates, and pectic acids.
• Scouring of textiles comprising cellulosic fibers in particular encompasses the removal of fats or waxes by saponification, wherein said fats or waxes are converted into water soluble or water miscible compounds.
• This part of the scouring step requires the presence of at least an alkali, e.g. NaOH (caustic soda).
• Scouring of textiles comprising cellulosic fibers further encompasses the removal of pectic polysaccharides.
• the removal of pectic polysaccharides can be conducted in the presence of at least one enzyme. If at least one enzyme is present during the scouring of textiles comprising cellulosic fibers, the term "bio-scouring" or “bio-scouring-step” is used.
• the at least one enzyme is in particular a pectinolytic enzyme. In one embodiment pectate lyase is used as enzyme.
• pectinolytic enzyme means a pectinolytic enzyme, preferably exhibiting lyase activity, which degrades pectic polysaccharides, such as homogalacturonan, rhamnogalacturonan I and rhamnogalacturonan II, preferably by trans-elimination, into soluble, in particular water-soluble compounds (i.e. an enzyme in group EC 4.2.2.x).
• the pectinolytic enzyme can be derived from a natural source or from an alternative source including from recombinant technologies or from genetic or chemical modification.
• the pectinolytic enyzyme can be a wild type enzyme or a mutant enzyme, including functional homologues of the pectinolytic enzyme.
• Functional homologue refers to a pectinolytic enzyme that differs in the amino acid sequence or the nucleic acid sequence encoding the amino acid sequence from a wild type enzyme but is still functionally active. On the protein level a functional homologue may contain one or more mutations comprising amino acid exchanges, insertions or deletions.
• the pectinolytic enzyme may also be chemically or enzymatically modified.
• One advantage (besides others already mentioned above) of using a pectinolytic enzyme during bio-scouring of textiles comprising cellulosic fibres is that the removal of other impurities, for example wax and proteins, from the cellulosic fiber of textiles is facilitated.
• pectate lyase is used as pectinolytic enzyme.
• Pectate lyase belongs to the family of lyases, specifically those carbon-oxygen lyases acting on polysaccharides.
• the systematic name of this enzyme class is (1 ⁇ 4)-alpha-D-galacturonan lyase (CAS-No. 9015-75-2; EC or IUB 4.2.2.2).
• Pectate lyase cleaves glycosidic linkages preferentially on polygalacturonic acid.
• pectinolytic enzyme a pectate lyase is used.
• the pectate lyase is used in form of a concentrated liquid formulation comprising the pectate lyase enzyme in pH-neutral form.
• a liquid formulation is for example known under the tradenames Bactosol ® CBS liq. from Archroma, PrimaGreen ® EcoScour liq. from Genencor ® /DuPont (CAS-No. 9015-75-2), BioScour NPL from Piscean, Addscour LLP conc. from Advanced Enzymes (CAS-No. 9032-75-1), or 601-L from Novozymes (CAS-No. 9015-75-2).
• the bio-scouring of textiles comprising cellulosic fibers is conducted using the composition according to the invention comprising a pectinolytic enzyme and at least one water-soluble polymer.
• the scouring of textiles comprising cellulosic fibers can further encompass the hydrolysis of proteins, dissolution of amino compounds, dissolution of mineral matter, emulsification and solubilisation of oils, removal and dispersion of dirt particles.
• the scouring step can be carried out a pH value in the range between 5 to 10, or between 6 to 9, or between 7 to 8, or at 9, or at 7.25. Further, the scouring step can be carried out at a temperature range of between 50°C to 100°C, or between 70°C to 90°C, or at 80°C.
• bleaching means the removal of coloring impurities of either natural or procedural origin from the textile comprising cellulosic fibers.
• the coloring impurities are usually chromophor compounds which can be degraded using bleaching agents.
• Suitable bleaching agents are therefore of oxidizing or reducing nature, like caustic soda (NaOH) and/or H 2 O 2 .
• Further additives may be present like detergents, wetting agents, sequestering agents or the like.
• an alkaline composition comprising H 2 O 2 is used, either alone or in combination with at least a PVP polymer.
• a mixture of NaOH and H 2 O 2 is used, either alone or in combination with at least a PVP polymer.
• One advantage (besides others already mentioned above) of using a combination of NaOH / H 2 O 2 and at least a PVP polymer is the improvement of the degree of whiteness of the textile comprising cellulosic fibers wherein at the same time, the tensile strength of the textile comprising cellulosic fibers is also improved (compared to the tensile strength of a textile comprising cellulosic fibers which is bleached using only NaOH/H 2 O 2 but no PVP polymer).
• the bleaching step can be carried out a pH value in range between 9 to 12, or at 11. Further, the bleaching step can be carried out at a temperature range of between 92°C to 102°C or at 98°C.
• the pre-treatment procedure comprises at least a desizing step wherein at least PVP polymer is used.
• the pre-treatment procedure comprises at least a desizing step wherein at least PVP polymer is used and a saccharifying enzyme is used.
• the pre-treatment procedure comprises at least a desizing step and a scouring step wherein at least PVP polymer is used in both steps.
• the pre-treatment procedure comprises at least a desizing step and a scouring step, wherein at least PVP polymer is used in both steps and a pectinolytic enzyme is used in the scouring step or at least PVP polymer is used only in the desizing step and at least a water-soluble polymer different from PVP polymer and a pectinolytic enzyme are used in the scouring step.
• the pre-treatment procedure comprises at least a desizing step and a scouring step, wherein at least PVP polymer is used in both steps and a saccharifying enzyme is used in the desizing step and a pectinolytic enzyme is used in the scouring step, or at least PVP polymer and a saccharifying enzyme are used only in the desizing step and at least a water-soluble polymer different from PVP polymer and a pectinolytic enzyme are used in the scouring step.
• the pre-treatment procedure comprises at least a desizing step, a scouring step and a bleaching step, wherein at least PVP polymer is used in all three steps.
• the pre-treatment procedure comprises at least a desizing step, a scouring step and a bleaching step, wherein at least PVP polymer is used in all three steps and a pectinolytic enzyme is used in the scouring step, or at least PVP polymer is used only in the desizing step and the bleaching step and at least a water-soluble polymer different from PVP polymer and a pectinolytic enzyme are used in the scouring step.
• the pre-treatment procedure comprises at least a desizing step, a scouring step and a bleaching step, wherein at least PVP polymer is used in all three steps and a saccharifying enzyme is used in the desizing step and a pectinolytic enzyme is used in the scouring step.
• textile refers without limitation to, fabrics, in particular woven or knitted goods.
• the textile can consist essentially of cellulosic fibers.
• textile(s) comprising cellulosic fibers as used in the context of the present invention means that the textile can consist of cellulosic fibers and non-cellulosic fibers, wherein the non-cellulosic fibers can be synthetic fibers or non-cellulosic fibers of natural origin.
• the textile can comprise or consist essentially of a mixture of cellulosic fibers and synthetic fibers. Further, the textile can comprise or consist essentially of a mixture of cellulosic fibers and non-cellulosic fibers of natural origin. Further, the textile can comprise or consist essentially of a mixture of cellulosic fibers and non-cellulosic fibers of natural origin and synthetic fibers.
• cellulosic fiber refers without limitation to fibers derived from cellulose containing material, in particular from cotton, linen, jute, hemp, regenerated cellulose or mixtures thereof.
• cellulosic fiber means that the fibers essentially comprise or consist of cellulose-based material derived from cotton, linen, jute, hemp, regenerated cellulose or mixtures thereof.
• synthetic fibers refers to without limitation to non-cellulosic fibers which essentially comprise or consist of polyamide, polyester and/or polyurethane.
• the textile comprising cellulosic fibers can comprise further non-cellulosic fibers of natural origin like wool or silk.
• the textile can comprise or consist of at least 70%, or at least 80%, or at least 90% cellulosic fibers, and wherein at most 30% (difference to 100%), or at most 20%, or at most 10% are non-cellulosic fibers, which are selected from synthetic fibers, in particular polyamide, polyester and/or polyurethane, or other non-cellulosic fibers of natural origin like wool or silk or mixtures thereof.
• the textile consists of 100% cellulosic fibers.
• contacting means that the textile comprising cellulosic fibers is at least partly, preferably essentially completely impregnated or soaked with the respective agent(s) or additive(s) required in the process according to the invention, e.g. the textile comprising cellulosic fibers is essentially completely impregnated with PVP polymer or with water or with the composition according to the invention comprising a pectinolytic enzyme and at least one water-soluble polymer, or with (a) mixture(s) with one or more compounds as described herein.
• polymer as used in the context of the present application encompasses homopolymer (consisting of only one kind of monomers) as well as copolymer (consisting of at least two kinds of monomers wherein the monomers differ from each other, e.g. by having different sum formulas).
• copolymer as used in the context of the present invention encompasses every kind of copolymer, like block copolymer or random copolymer.
• water-soluble polymer as used in the context of the present invention is to be understood as a polymer which is capable of being at least partly dissolved in water.
• the water-soluble polymer can be soluble in water at 25°C at a concentration of up to 5.0 g/l, or up to 15.0 g/l, or up to 30.0 g/l, or up to 40.0 g/l to give an optically, respectively visible clear solution.
• the water-soluble polymer can be selected from the group consisting of pure or derivatised polyvinylalcohol (PVA) homo- or copolymer; polyacrylate homo- or copolymer; polyalkyleneglycol homo- or copolymer, in particular polyethyleneglycol homo- or copolymer; modified polyalkyleneglycol homo- or copolymer, in particular modified polyethyleneglycol homo- or copolymer, in particular alkylpolyethyleneglycol homo- or copolymer, alkoxypolyethyleneglycol homo- or copolymer, acylpolyethyleneglycol homo- or copolymer; polyvinylbutyral homo- or copolymer; non-ionic or anionic modified polyesters; or non-ionic or anionic modified oligoesters; modified polystyrene, in particular low crosslinked polystyrene grafted with polyethylene glycol (TentaGelAmino Resin), or aminomethyl polysty
• water-soluble polymers can be built from one or more of the monomers vinylpyrrolidone, vinylalcohol, acrylamide, vinylacetate or acrylate.
• a water-soluble polymer in combination with a pectinolytic enzyme increases the effect of the pectinolytic enzyme.
• the pectinolytic enzyme shows improved lyase activity, i.e. improved degradation of pectic polysaccharides.
• the combination of PVP polymer and pectinolytic enzyme shows this advantage.
• a method of increasing the effect of a pectinolytic enzyme, characterized by admixing said enzyme with at least one water-soluble polymer is also one aspect of the present invention.
• Suitable water-soluble polymers can be obtained e.g. under the trade name Arostit TL 0280 (polyvinylpyrrolidon, CAS-No. 9003-39-8)) from Archroma (Indonesia), or under the trade name PEG M 5000 FL (methoxypolyethyleneglycole, CAS-No. 9004-74-4) from Clariant (BU ICS), or under the trade name Mowital B3OH (polyvinylbutyral, CAS-No. 68648-78-2) from Kuraray, or under the trade name Texcare SRN 300 (non-ionic polyester, CAS-No. 152442-40-5) from Clariant (BU ICS), or under the name B.S.A. (bovine serum albumin, CAS-No. 9048-46-8) from Sigma Aldrich.
• At least PVP polymer is used as water-soluble polymer. It is possible to add further water-soluble polymers selected from the group as defined above.
• polyvinylpyrrolidon polymer or "PVP polymer” as used in the context of the present invention means a polymer comprising at least vinylpyrrolidon as monomer, or a a polymer mixture, wherein at least two polymers are present, wherein each of the at least two polymers comprises at least vinylpyrrolidon as monomer.
• polyvinylpyrrolidon polymer or "PVP polymer” encompasses PVP homopolymer (consisting of only vinylpyrrolidon monomers) and PVP copolymer or a mixture of PVP homopolymer and PVP copolymer(s), wherein the PVP copolymer comprises at least vinylpyrrolidone monomer and one or more monomers selected from vinylalcohol or acrylamide or acrylic acid or methylmethyacrylate, or vinylacetate, or diallyldimethyl ammonium chloride (DADMAC).
• DADMAC diallyldimethyl ammonium chloride
• the ratio of vinylpyrollidone monomer : other monomer(s) in the PVP copolymer can be in the range of 99:1 to 1:99, or 90:10 to 10:90, or 80:20 to 20:80, or 70:30 to 30:70, or 60:40 to 40:60 or 50:50.
• the ratio of vinylpyrollidone monomer : other monomer(s) in the PVP copolymer can be 80:20.
• the PVP polymer can have an average molecular weight of 50,000 to 500,000 g/mol, preferably of 100,000 to 400,000 g/mol, further preferred of 200,000 to 300,000 g/mol, having a residual monomer content of less than 0.01%.
• the amount of PVP polymer is 0.1 to 2% by weight, or 0.2 to 1.5 % by weight or 0.4 to 1% by weight, or 0.15% by weight, or 0.45% by weight, or 0.9% by weight with respect to total amount of the respective composition used in which the PVP polymer is present.
• the advantage of using a PVP polymer is that crease and lay marks of cellulosic fibers during processing, in particular during Pad Steam Processing in a steamer can be inhibited. Further the PVP polymer has a favorable impact on liquor pick-up of the thus pre-treated textile comprising cellulosic fibers which has further also improved liquor retention ability. Also the degree of whiteness and absorbency level after bleaching as well as tensile strength, in particular after pad steam bleaching with H 2 O 2 is improved, if PVP polymer is used.
• the PVP polymer is a copolymer comprising vinylpyrrolidone and acrylamide as monomers.
• the PVP polymer is a copolymer comprising vinylpyrrolidone and acrylamide as monomers, wherein the ratio of vinylpyrrolidone : acrylamide is 80:20.
• the PVP polymer is a copolymer comprising vinylpyrrolidone, acrylamide and diallyldimethyl ammonium chloride (DADMAC) as monomers.
• DADMAC diallyldimethyl ammonium chloride
• the PVP polymer is a copolymer comprising vinylpyrrolidone, acrylamide and diallyldimethyl ammonium chloride (DADMAC) as monomers, wherein the ratio of vinylpyrrolidone : acrylamide : DADMAC is 80:17:3.
• DADMAC diallyldimethyl ammonium chloride
• the PVP polymer is a copolymer comprising vinylpyrrolidone and acrylic acid as monomers.
• the PVP polymer is a copolymer comprising vinylpyrrolidone and acrylic acid as monomers, wherein the ratio of vinylpyrrolidone : acrylic acid is 80:20.
• the PVP polymer is a copolymer comprising vinylpyrrolidone and methylmethacrylate as monomers.
• the PVP polymer is a copolymer comprising vinylpyrrolidone and methylmethacrylate as monomers, wherein the ratio of vinylpyrrolidone : methylmethacrylate is 80:20.
• the PVP polymer is a copolymer comprising vinylpyrrolidone and vinylacetate as monomers.
• the PVP polymer is a copolymer comprising vinylpyrrolidone and vinylacetate as monomers, wherein the ratio of vinylpyrrolidone : vinylacetate is 80:20.
• the PVP polymer is used according to the invention as an additive in the pre-treatment procedure for inhibiting crease and lay marks of cellulosic fibers, respectively of textiles comprising cellulosic fibers and for improving liquor retention ability, whiteness, absorbency levels and tensile strength of cellulosic fibres.
• liquid retention ability refers to the ability of textiles comprising cellulosic fibers to retain more liquor and humidity during steaming on the textile, which has a favorable impact on the avoidance of crease and lay marks, since higher amounts of humidity (liquor/water) remain in or on the textile comprising cellulosic fibers after impregnation. This avoids too fast drying up of textile parts directly exposed to the steamer atmosphere and also minimizes the chemical damage of the textile after steaming.
• the better liquor retention ability can result in an increased liquor pick up during impregnation of the textile comprising cellulosic fibers with agent(s) /additive(s) used during the process according to the invention, in particular during the pre-treatment procedure.
• agent(s) /additive(s) used during the process according to the invention in particular during the pre-treatment procedure.
• This supports a more efficient reaction of agent(s) / additive(s) used during scouring step and/or bleaching step which results in an improved performance in terms of whiteness and absorbency levels of the textile comprising cellulosic fibers.
• composition according to the invention comprises a pectinolytic enzyme as defined above, and at least one water-soluble polymer as defined above.
• the pectinolytic enzyme can be present in the composition according to the invention in form of a concentrated liquid formulation comprising a pH-neutral pectate lyase enzyme.
• composition according to the invention can be designed in form of a liquid solution or dispersion or as co-lyophilisate.
• co-lyophilisate refers to a stable preparation of the composition according to the invention, obtained by rapid freezing and dehydration of the frozen composition under high vacuum.
• the composition according to the invention comprises pectate lyase, at least one water-soluble polymer and at least one further additive.
• the at least one additive can be selected from the group comprising non-ionic or anionic detergent, sequestering agent, saccharifying enzyme, peroxide stabilizer or mixtures of one or more of these additives.
• the non-ionic detergent can be selected from the group comprising polyglycol ether derivatives and fatty alcohol alkoxylates or mixtures thereof.
• the anionic detergent can be a phosphoric acid ester.
• Suitable non-ionic or anionic detergents can be obtained under the trade name Hostapal XTRA liq. c. from Archroma (Thailand) (mixture of non-ionic detergents), or under the trade name Hostapal UH liq. from Archroma (China) (mixture comprising C 10 Guebert alcohol, ethoxylated (7 EO) phosphoric ester salt), or under the trade name Hostapal DTC pa.
• Sequestering agents can be based on diethylenetriamine penta(methylene phosphonic acid) (DTPMP), polyacrylate and/or gluconate.
• a peroxide stabilizer can be present in the bleaching step, in particular if Pad Steam Bleaching is conducted.
• the peroxide stabilizer can be based on polyhydroxyphosphonates, polyacrylate and/or gluconate.
• the composition according to the invention comprises pectate lyase, at least one water-soluble polymer, in particular PVP polymer, a non-ionic detergent, a sequestering agent, and an alpha-amylase.
• composition according to the invention is used in the process for removing impurities according to the invention.
• the composition according to the invention is used in the pre-treatment procedure of textiles comprising cellulosic fibres or a mixture of cellulosic fibres and synthetic fibres.
• the composition according to the invention is used in the scouring step of the pre-treatment procedure of textiles comprising cellulosic fibres or a mixture of cellulosic fibres and synthetic fibres.
• the composition comprising pectate lyase, water-soluble polymer, in particular PVP polymer, alpha amylase, sequestering agent and non-ionic detergent is being applied on a padding unit and/or roller compartment and exposed during 20 min at 80°C in a steamer (conditioned with saturated steam).
• the average molecular weight of the PVP polymer used herein is 200.000 to 300.000 g/mol according to the GPC (Gel Permeation Chromatography) method.
• the residual monomer content in the PVP polymer is below 0.01% by weight.
• the activity of the pectate lyase used herein was measured according a test method from DuPont Industrial Bioscience (C401-00). The principle of this test method is based on the fact that pectate lyase catalyzes the formation of double bonds in polygalacturonic acid, which can be read with an UV/VIS-Spectrophotometer at 235 nm wavelength. The double bond formation is proportional to the enzyme activity. The activity is displayed in PLU/g pectate lyase, which can be calculated out of the product between the standard equivalent curve (PLU/ml) and the sample dilution divided through the weight of sample (g).
• PLU/g pectate lyase PLU/g pectate lyase
• the pectate lyase is combined with a non-ionic detergent, a sequestering agent, chelating earth alkalines (Ca, Mg) and heavy metals (Fe) and, optional an alpha-amylase breaking down starch size on cotton woven fabrics.
• compositions used in the Examples were used in the Examples: Table 2: Compositions used in the Examples.
• Optise ® NEXT liq. alpha-amylase
• Example 1 Determination of crease (lay) mark inhibition during Pad Steam application
• the wet crease angle recovery was directly measured after steaming.
• the test method followed a procedure described in AATCC 66-2003, option 2 on wet fabric, whereas a fabric sample of 40 x 15 mm was folded end-to-end, exposed for 5 min at room temperature with a 500 g weight on top and afterwards the recovery angle from a circular scale in degree (°) was evaluated.
• Table 3 Wet crease recovery angle according to AATCC 66-2003, option 2.
• the evaporation test followed a procedure described for evaluation of moisture management properties according to the test method from M&S (Marks & Spencer).
• a conditioned specimen was weighed and afterwards exposed to 1.0 ml of distilled water in a petri dish. Then the weight of the specimen was evaluated after each 5 min up to 30 min time. The remaining water in the fabric was calculated in % with regard to the initial weight (at 0 min) of the fabric.
• Table 4 Liquor retention ability according to M&S (Marks & Spencer).
• the ability to retain more liquor and humidity during steaming on the textile also has a favorable impact on avoidance of crease and lay marks, since higher amounts of humidity (liquor/water) remain on the textile after impregnation. This avoids too fast drying up of fabric parts directly exposed to the steamer atmosphere and also minimizes the chemical damage of the fabric after steaming.
• Example 3 PVP in continuous pre-treatment: Performance improvement during alkaline scouring and H 2 O 2 -bleaching (Pad Steam).
• the performance of the process according to the invention, respectively the performance of the composition according to the invention used in the bio-scouring step can be determined using a Ruthenium Red dyestuff solution applied to the textile after treating the same with the composition according to the invention, which indicates the amount of pectin remaining on the cotton fiber.
• the absorbency level was measured according a modified AATCC test method (197-2012-Vertical Wicking of Textiles, Clariant Internal Test Method TM 7302) or the drop test method according to TEGEWA: a drop of colored water was placed on the surface of the fabric and the time was evaluated (in sec.), until the drop had been completely absorbed up from the fabric and b) according the wicking height method, whereas a sufficient amount of dye solution was filled into a Petri dish, minimal height 15 mm. Then the textile test stripes were suspended in the dye solution so that the bottom end just penetrated the surface of the solution. The stripes were dipped for approximate 2-3 mm. The time was evaluated with a stop watch and after 5 min, the stripes were removed and dried between layers of absorbent paper.
• Table 5 and Table 6 show that addition of PVP polymer leads to better performances in terms of whiteness and absorbency levels. The higher the wicking height and the shorter the time of the drop test, the better the absorbency of the fabric.
• Tensile strength was determined according to ISO 13934-1. A test specimen is extended at a constant rate until it ruptures. The maximum force at rupture is recorded. The higher the value (force) or the more close the value compared to the untreated, grey fabric, the better the performance. Table 7: Tensile strength improvement during Pad Steam processing (determination after scouring & bleaching).
• Table 7 demonstrates that the tensile strength of the textile is clearly improved in the presence of PVP compared to the reference processes.
• the dryed textile samples were then dyed in a Launder-O-Meter (LOM) at liquor ratio 20:1 at 50°C for 30 min in 250 ml of a 0.05% w/w Ruthenium Red staining solution in phosphate buffer at pH 6.0. After dyeing, the samples were washed off with warm demineralized water, dried and then, color strength (%) and color difference (dE*) were measured with Datacolor Spectrophotometer 650. Table 8: Continuous bio-scouring effects.
• LOM Launder-O-Meter
• pectate lyase in combination with PVP polymer leads to a reduced color strength of Ruthenium Red and minimizes color difference compared to the untreated, grey fabric, demonstrating the improved bio-scouring effect in the continuous pre-treatment.

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