EP4630616A2 - Process for providing sacrificial printable surface layers to a textile - Google Patents

Process for providing sacrificial printable surface layers to a textile

Info

Publication number
EP4630616A2
EP4630616A2 EP23825268.8A EP23825268A EP4630616A2 EP 4630616 A2 EP4630616 A2 EP 4630616A2 EP 23825268 A EP23825268 A EP 23825268A EP 4630616 A2 EP4630616 A2 EP 4630616A2
Authority
EP
European Patent Office
Prior art keywords
textile
sacrificial
biopolymer
surface layer
printable surface
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.)
Pending
Application number
EP23825268.8A
Other languages
German (de)
French (fr)
Inventor
Emma INGO
Romain BORDES
Angelina WAGNE
Matilda CROY
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.)
Vividye AB
Original Assignee
Vividye AB
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 Vividye AB filed Critical Vividye AB
Publication of EP4630616A2 publication Critical patent/EP4630616A2/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
    • 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
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
    • D06M15/03—Polysaccharides or derivatives thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B1/00—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating
    • 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
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
    • D06M15/03—Polysaccharides or derivatives thereof
    • D06M15/11—Starch or derivatives thereof
    • 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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/445—Use of auxiliary substances before, during or after dyeing or printing
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/46—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing natural macromolecular substances or derivatives thereof
    • D06P1/48—Derivatives of carbohydrates
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
    • D06P1/54—Substances with reactive groups together with crosslinking agents
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
    • D06P5/002—Locally enhancing dye affinity of a textile material by chemical means
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
    • D06P5/12—Reserving parts of the material before dyeing or printing ; Locally decreasing dye affinity by chemical means
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
    • D06P5/13—Fugitive dyeing or stripping dyes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
    • D06P5/30—Ink jet printing
    • 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
    • D06L1/02—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using organic solvents
    • D06L1/04—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using organic solvents combined with specific additives
    • 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
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies

Definitions

  • the present disclosure relates to processes for providing a sacrificial printable surface layer to a textile.
  • the sacrificial printable surface layer comprises a biopolymer and a film-forming polymer dispersion.
  • the textile production industry is estimated to be responsible for around 10% of total global green-house gas emissions.
  • the emissions from the textile production industry are greater than the combined emissions from maritime and flight emissions.
  • the emissions come substantially from the production process of textiles, therefore, prolonging the lifetime of products may substantially decrease emissions.
  • the present invention preferably seeks to mitigate, alleviate or eliminate one or more of the above-identified deficiencies in the art and disadvantages singly or in any combination and solves at least the above mentioned problems by providing a process for providing a textile with a sacrificial printable surface layer comprising, depositing a liquid composition to the textile.
  • the liquid composition comprising: a crosslinkable biopolymer composition, the biopolymer composition comprising at least one biopolymer, the biopolymer in its crosslinked state, being degradable via enzymatic degradation; and a film-forming polymer dispersion.
  • the process further comprising drying each of, and at least partially crosslinking at least one of, the polymer dispersion and biopolymer composition, to form the sacrificial printable surface layer.
  • the sacrificial printable surface layer is ideal for existing textile ink deposition processes such as screen-printing applications presently used for providing textile inks to textiles to form visual features.
  • the sacrificial printable surface layer may be machine washable such that it is substantially not removed when washed in water.
  • a process for printing a visual feature on a textile is provided.
  • a removal solution is provided and a process for removing a sacrificial printable surface layer is provided.
  • the sacrificial printable surface layer may be removed via a removal solution.
  • the textile may be reused, such as used as-is or reprinted with a new sacrificial printable surface layer and textile ink to form a new visual feature.
  • a textile comprising a sacrificial printable layer is provided.
  • a process for removing a sacrificial printable surface layer from a textile is provided.
  • the present disclosure relates to the provision of a sacrificial printable surface layer to a textile.
  • the sacrificial printable surface layer enables a textile ink to be deposited on to the sacrificial printable surface layer.
  • the textile with the sacrificial printable surface layer and the textile ink deposited thereupon may be used in the normal fashion. That is, the textile if it is a garment may be worn, washed etc.
  • the sacrificial printable surface layer may thereafter be removed. Removal of the sacrificial printable surface layer removes not only the sacrificial printable surface layer but also the textile ink.
  • the garment is therefore returned to its original state, comprising neither the sacrificial printable surface layer nor the textile ink.
  • the provision of the sacrificial printable layer provides a process for re-using textiles that have been provided with textile inks. Thereby prolonging the potential lifetime of the textile and reducing total greenhouse gas emissions in textile production.
  • a sacrificial printable surface layer may be provided by the deposition of a composition comprising a crosslinkable biopolymer composition and a film-forming polymer dispersion.
  • the composition is applied to the textile and forms a surface layer on the textile.
  • the composition may be dried and at least partially crosslinked to provide a surface upon which a textile ink may be deposited. That is, a separate layer of textile ink may be deposited on the sacrificial printable surface layer.
  • the components of the sacrificial printable surface layer are not additional ink components provided to a textile ink composition, but rather a separate composition applied separately and prior to the deposition of the textile ink.
  • the crosslinkable biopolymer composition comprises at least one crosslinkable biopolymer. That is, the biopolymer of the biopolymer composition is crosslinkable. Generally, the biopolymer is chemically crosslinkable. The polymer chains of the biopolymer may also physically entangle causing physical crosslinking.
  • the crosslinked biopolymer composition is degradable via enzymatic degradation. That is, the crosslinked biopolymer is susceptible to degradation via one or several enzymes.
  • the biopolymer composition may comprise a polysaccharide as the crosslinkable biopolymer.
  • the biopolymer composition may comprise amylose and amylopectin.
  • the crosslinkable biopolymer may be starch.
  • Starch is degradable via enzymatic degradation, hydrolysed, by hydrolytic enzymes such as the amylases alpha-amylase, beta-amylase, and gamma-amylase.
  • the starch may be potato starch or modified starch, such as an acetylated potato starch. Other starches, such as starches from com, quinoa etc. may also be suitable.
  • the starch may be non-ionic, cationic, or anionic. As shown in the experimental section, anionic starch has shown improved dissolution properties compared to cationic starch.
  • a cationic starch may be for example, Amylofax, (Avebe).
  • An anionic starch may be for example, Perfectamyl, (Avebe) which has displayed suitable properties as the crosslinkable biopolymer as it dissolves well in aqueous solutions and avoids the formation of aggregates in aqueous solutions.
  • the biopolymer composition may comprise pectin. That is, the biopolymer of the biopolymer composition may be pectin.
  • the biopolymer composition may comprise high methylester (HME) pectin.
  • HME high methylester
  • Biopolymer compositions comprising pectin have shown better film forming properties and have an improved response to enzymatic degradation than starch. Additionally, biopolymer compositions comprising pectin have displayed improved printability and washability compared to compositions comprising starch.
  • the biopolymer composition may comprise a plurality of different bio- polymers/monomers.
  • the biopolymer composition may comprise starch and pectin.
  • Each of the biopolymers when crosslinked are selected such that they are susceptible to enzymatic degradation via one or several enzymes.
  • the film-forming polymer dispersion comprises a polymer not being a biopolymer, and specifically not the biopolymer in the biopolymer composition.
  • the film-forming polymer dispersion generally comprises a high molecular weight polymer in an aqueous dispersion.
  • the film-forming polymer dispersion may be an aqueous copolymer dispersion.
  • the film-forming polymer may be a versatate acrylic polymer dispersion.
  • the film-forming polymer being a polymer dispersion may be referred to as a latex, i.e., a synthetic latex.
  • the solids content of the polymer dispersion may be from about 40% to about 60%, such as from about 42% to about 48%.
  • the polymer dispersion may have a viscosity of from about 5 to about 5000 mPas, such as from about 5 to about 3000 mPas, or from about 500 to about 2000 mPas, according to ISO 2555 (Brookfield RVT Spindle 3, RPM 20, factor 50) which have been shown to be suitable for screen printing applications.
  • the particle size of the polymer dispersion may be from about 50 nm to about 500 nm, such as from about 80 nm to about 200 nm.
  • the polymer dispersion may be, for example, AC 2007 (Alberdingk®), CHP 570 (CH Polymers Oy), Tubicoat A19 (CHT Germany GmbH), or other suitable polymer dispersions.
  • a film-forming polymer dispersion having a reduced water fastness when compared to AC 2007 enables an increased amount of polymer dispersion in the liquid composition, providing improved film-forming and satisfactory removal properties.
  • Water fastness refers to the stability of the film forming polymer dispersion when immersed in water at ambient temperatures.
  • the liquid composition is generally an aqueous composition comprising water, the biopolymer composition, and the polymer dispersion.
  • the aqueous liquid composition may comprise from about 10% to about 90% water based on the total weight of the liquid composition, such as from about 50% to about 85%.
  • the liquid composition may comprise the biopolymer composition at an amount of from about 1% to about 20% based on the total weight of the composition, such as from about 2% to about 10%.
  • the liquid composition may comprise the polymer dispersion at an amount of from about 1% to about 50%, such as from about 1% to about 2% to about 30%.
  • the liquid composition may comprise a crosslinking agent at an amount from about 0.05% to about 5% based on the total weight of the liquid composition.
  • a crosslinking agent may be added to the biopolymer composition.
  • An example of such a crosslinking agent is 1,2,3,4-Butanetetracarboxylic acid (BTCA).
  • BTCA 1,2,3,4-Butanetetracarboxylic acid
  • the crosslinking agent for the biopolymer composition may be present at an amount of 0.05% to about 5% based on the total weight of the liquid composition, ideally the crosslinking agent is present at an amount of from about 0.4% to about 1%.
  • the film-forming polymer dispersion may comprise a crosslinking agent. Therefore, the liquid composition may comprise a crosslinking agent in addition to the crosslinking agent selected for the biopolymer composition.
  • Such polymer dispersions may be referred to as self-crosslinking polymer dispersions.
  • the crosslinking agent in the polymer dispersion may selectively crosslink only the polymer of the polymer dispersion, or may additionally crosslink the biopolymer and the polymer in the polymer dispersion.
  • the biopolymer composition may comprise cellulose nanofibrils (CNF).
  • CNF cellulose nanofibrils
  • the CNF may be provided in addition to the crosslinkable biopolymer.
  • the addition of CNF to the biopolymer composition increases the viscosity of the biopolymer composition.
  • the high aspect ratio of the CNF may additionally provide increased attachment surfaces for crosslinking the biopolymer compared to a biopolymer composition without CNF, thereby enhancing the strength and of the crosslinked biopolymer network.
  • the CNF may be provided at an amount of from about 0.1% to about 5%, such as about 1.5 to about 2%.
  • the CNF has been shown to substantially increase the viscosity and stability of the aqueous liquid composition at an amount of less than 2%, which is suitable for printability with e.g., screen printing processes.
  • the liquid composition may comprise at least one plasticiser.
  • the plasticiser improves the film surface and mechanical properties and thereby improves the physical properties of the sacrificial layer for subsequent textile ink printing.
  • the plasticiser may be present at an amount of from about 0.1% to about 5%, such as about 0.1% to about 1% based on the total weight of the aqueous liquid composition.
  • the plasticiser may be for example glycerol, dipropylene glycol and/or polyethylene glycol 200.
  • the liquid composition may comprise several plasticisers to achieve improved printability.
  • Varying the comparative amounts of biopolymer composition, the components of the biopolymer composition, and the solid polymer in the polymer dispersion to each other has been shown to vary the properties of the deposited layer. Properties here refers to at least the suitability for receiving a textile ink, and washability of the sacrificial printable surface layer.
  • the liquid composition may comprise the biopolymer composition at an amount of greater than about 1% based on the total weight of the liquid composition including water.
  • the liquid composition may comprise the polymer dispersion at an amount of greater than about 1 % based on the total weight of the liquid composition including water.
  • the liquid composition may comprise the biopolymer at an amount of from about 2% to about 10%.
  • the liquid composition may comprise the polymer dispersion at an amount of from about 1% to about 30%, such as from about 15% to about 30%. Examples of suitable compositions are provided in the experimental section.
  • the liquid composition may comprise a polysaccharide to polymer dispersion ratio of at least 1:0.1 (polysaccharide:polymer in polymer dispersion).
  • the liquid composition may have a ratio of at least 1:1 (polysaccharide:polymer in polymer dispersion), such as at least 1:2 (polysaccharide:polymer in polymer dispersion). That is, the solid polymer in the polymer dispersion to polysaccharide ratio may be at least 0.1:1, such as 1: 1, such as 2:1.
  • the higher the polymer solid content with respect to the biopolymer in the composition generally results in layers which have improved durability and in particular washability. All ratios are with respect to the dry weight of the respective components in the liquid composition.
  • the liquid composition is provided to the textile in solution, that is, the liquid composition is applied wet. After application to the textile, the liquid composition comprising the biopolymer composition is dried and at least partially crosslinked. The polymer dispersion comprised in the liquid composition is also at least dried. The polymer dispersion is ideally also crosslinked after application to the textile. The crosslinking of the biopolymer composition and the polymer dispersion may occur simultaneously, that is, there need not be separate crosslinking steps.
  • the liquid composition is dried, cured, prior to the application of the textile ink to the surface layer.
  • the drying may at least partially crosslink both the biopolymer composition and the polymer dispersion.
  • the biopolymer composition nor the polymer dispersion need be fully crosslinked to form the sacrificial printable surface layer.
  • the liquid composition comprising the biopolymer composition and the polymer dispersion must be sufficiently dry prior to the application of the textile ink.
  • the polymer dispersion When applied to form the sacrificial printable layer, the polymer dispersion is supported physically by the at least partially crosslinked biopolymer.
  • the crosslinkable biopolymer composition forms a polymer network which physically and chemically supports the polymer dispersion and textile ink.
  • the drying and at least partial crosslinking of the liquid composition comprising the polymer dispersion and the biopolymer composition forms covalent chemical and/or physical crosslinks between at least the biopolymer molecules in the biopolymer composition.
  • the at least partial crosslinking may form chemical crosslinks between the biopolymer molecules in the biopolymer composition and the polymers in the polymer dispersion. That is, the biopolymer molecules are at least crosslinked to each other, and may be crosslinked to the polymers in the polymer dispersion.
  • the partial crosslinking may additionally form chemical crosslinks between the polymers in the polymer dispersion.
  • a process for providing a textile with a sacrificial printable surface layer comprises: depositing a liquid composition to the textile, and, drying and at least partially crosslinking the biopolymer in the liquid composition.
  • the liquid composition comprises a crosslinkable biopolymer composition.
  • the biopolymer composition comprises at least one biopolymer which is crosslinkable.
  • the biopolymer in its crosslinked state is capable of degradation via enzymatic degradation.
  • the liquid composition further comprises a polymer dispersion.
  • the liquid composition is at least partially cured after it has been applied to the textile.
  • the drying and at least partial crosslinking forms a partially solid, at least partially crosslinked layer upon which a traditional textile printing ink may be deposited.
  • Partially solid refers to the layer being suitable for receiving, and forming a surface upon which, a textile ink may be deposited without interacting with the underlying textile.
  • the sacrificial printable surface layer prevents the textile ink from interacting with and contacting the textile.
  • the deposited and at least partially cured sacrificial printable layer is generally substantially colourless.
  • the deposited layer forms as a substantially colourless film on the textile. It is understood that if a coloured composition is desired, the liquid composition and therefore deposited layer may be coloured with colouring additives.
  • the sacrificial printable surface layer on the textile may be provided with textile ink to form a printed feature to the textile.
  • the printing process may be any normal textile printing process such as screen printing, rotary screen printing, or other printing techniques used to deposit a textile ink layer.
  • screen printing/ silkscreen printing of a textile ink to the sacrificial printable surface layer has been shown to form washable, vibrant coloured features to textiles.
  • the textile ink is cured after deposition.
  • the curing process of the textile ink may further crosslink the components of the liquid composition, that is, the biopolymer composition and the polymer dispersion. Therefore, the drying and partial crosslinking step of the process for applying the sacrificial printable surface layer may be complemented by a further crosslinking step which simultaneously cures the textile ink, and additionally crosslinks at least the biopolymer composition.
  • the present disclosure relates to a sacrificial printable surface layer, which may be removed, thus removing the both the sacrificial printable surface layer and additionally any textile inks which may have been deposited on the sacrificial printable surface layer.
  • the sacrificial printable surface layer is removable in water alone.
  • Such sacrificial printable surface layers are detailed in experiments 6 and 7.
  • a sacrificial printable surface layer which is removable in water alone is not suitable for repeated use and washing.
  • the sacrificial printable surface layer is removable in an aqueous removal solution comprising components in addition to water to degrade the biopolymer composition and polymer dispersion. If the sacrificial printable surface is not degradable in water alone, the textile may be used several times, washed etc. without substantially degrading the appearance of the print provided to the textile, or the sacrificial printable surface layer.
  • a removal solution for removing the sacrificial printable surface layer from a textile comprises a component for swelling the film formed by the film-forming polymer dispersion, and a component for degrading the crosslinked biopolymer.
  • the removal solution is generally aqueous. The majority of the removal solution may be water.
  • the component for swelling the polymer dispersion film is generally an organic solvent for swelling the film formed by the film-forming polymer dispersion.
  • the component for degrading the crosslinked biopolymer may generally be an enzyme for hydrolysing or otherwise degrading the crosslinked biopolymer.
  • the organic solvent swells but generally does not dissolve the polymer issued from the polymer dispersion as the polymer dispersion generally comprises high molecular weight polymers which are not easily dissolved in organic solvents.
  • An organic solvent selected such that it has good polymer interaction will migrate within the polymer network causing it to swell.
  • the enzyme selected to degrade the crosslinked biopolymer will break the biopolymer network via for example, hydrolysis.
  • the two-component removal solution therefore will degrade both components of the sacrificial printable surface layer and enable it to be removed from the textile surface.
  • the enzyme is selected to degrade the biopolymer. Different enzymes may be selected depending on the specific biopolymer used in the sacrificial printable surface layer. For example, if the biopolymer composition comprises polysaccharide susceptible to degradation via alpha-amylase, then the enzyme in the removal solution may be alpha- amylase. Similarly, if the biopolymer composition comprises for example pectin, then the removal solution may comprise pectinase.
  • the removal solution may comprise from 0.05% to about 5% vol. enzyme solution having a concentration of greater than 500 units per mg, based on the volume of the solution prior to the addition of the enzyme solution.
  • the removal solution may comprise from about 0.1% to about 2% enzyme solution, such as about from about 0.2% to about 1.5% enzyme solution.
  • the removal solution is generally an aqueous solution comprising at least about 10% organic solvent based on the total weight of the aqueous solution.
  • the removal solution may comprise at least two polar organic solvents.
  • the first polar organic solvent may be provided at an amount of at least about 10%.
  • the second polar organic solvent, a cosolvent may be present at an amount of at least 3%, such as at least 5%, based on the total weight of the aqueous removal solution.
  • the first polar organic solvent may be for example acetone or advantageously, dipropylene glycol dimethyl ether, DME. Dipropylene glycol DME is advantageous as it is inert and non-toxic whilst maintaining effective performance with the polymer dispersions of the present application.
  • the second polar organic solvent may be for example propylene carbonate. In some instances, the second polar organic solvent may be excluded, and the removal solution may comprise only the first polar organic solvent.
  • the removal solution comprises at least one surfactant at an amount of from about 1% to about 10%, such as about 5%.
  • the surfactant is ideally a non-ionic surfactant.
  • the removal solution may comprise at least two non-ionic surfactants, such as a mixture with hydrophilic-lipophilic balance, HLB, between 5 and 17.
  • the surfactant(s) may be a synthetic alcohol ethoxy late/alkoxylate suitable for aqueous solutions. The surfactant enhances at least the swelling of the polymer dispersion film.
  • the process for removing the sacrificial printable surface layer comprises providing the removal solution to the textile comprising the sacrificial printable surface layer.
  • the provision of the removal solution may be via washing, spraying, immersion etc.
  • the component of the removal solution for swelling the polymer dispersion film swells the film formed by the polymer dispersion on the surface of the textile.
  • the component for degrading the biopolymer network degrades the crosslinked biopolymer on the surface of the textile.
  • the process for removing the sacrificial printable layer may comprise mechanically agitating the textile, for example, via washing in a washing machine, to physically agitate and remove the sacrificial printable surface layer from the surface of the textile.
  • the agitation may occur in the aqueous removal solution, such that the textile comprising the sacrificial printable surface layer is at least partially immersed in the removal solution during mechanical agitation.
  • the process may comprise pretreating the sacrificial printable surface layer with the removal solution and then agitation in an aqueous solution comprising traditional washing detergents.
  • the removal process results in the removal of the sacrificial printable surface layer, and any textile inks deposited thereon, and therefore enables the textile to be reused.
  • the textile may subsequently be provided with a new sacrificial printable surface layer.
  • the textile may thereafter be provided with a newly deposited textile ink upon the newly deposited sacrificial printable surface layer.
  • a sacrificial printable surface layer which may be removed in water alone, that is, without the need for a removal solution which swells the polymer dispersion and/or degrades the crosslinked biopolymer.
  • the amount of biopolymer is increased compared to the amount of polymer dispersion. That is, the ratio of biopolymer to polymer solid in the polymer dispersion is increased.
  • Such a liquid composition is described in experiments 6 and 7.
  • Such a sacrificial printable layer may be removable in water alone.
  • the biopolymer composition comprises starch.
  • a textile produced according to the process for providing a sacrificial printable surface layer comprises a textile, a surface of the textile having a layer provided thereon, the layer comprising an at least partially crosslinked biopolymer composition and a filmforming polymer dispersion.
  • the at least partially crosslinked biopolymer composition and the polymer dispersion form a single layer.
  • the single layer is for receiving a printable textile ink.
  • the single layer is substantially colourless.
  • the sacrificial printable surface layer may be provided with a textile ink such that a visual feature is provided to the textile upon the sacrificial printable surface layer.
  • the textile which forms the substrate for the printable surface layer may be cotton, polycotton, polyester or any textile suitable for receiving a textile ink print.
  • Cationic starch (Amylofax®, Avebe) as the biopolymer was dissolved in water at an amount of 6.6%. When dissolved and heated in water the cationic starch is very viscous. The starch was cooked for 20 minutes and stirred to hinder the formation of large particles. The solution was then cooled and stirred until it reached room temperature.
  • Citric acid was provided as a crosslinking agent at an amount of 10% compared to the dry weight of cationic starch.
  • Glycerol was added at 10% compared to the dry weight of the starch.
  • a polymer dispersion (Alberdingk® Acrylic Copolymer Dispersion AC 2007) was added at an amount of 600% compared to the dry weight of the cationic starch.
  • the opposite charge of the polymer dispersion-biopolymer caused coagulation and the catalyst destabilises and created precipitates in the solution.
  • the total components of the liquid composition are detailed in the table below.
  • the liquid composition was screen-printed onto the surface of a textile, a white single Jersey cotton t-shirt, forming the sacrificial printable surface layer. Due to the formation of aggregates the surface layer was comparatively difficult to handle.
  • the screen-printed liquid composition was flash dried for between 2 and 10 seconds to partially cure the liquid composition. After screen-printing of the sacrificial surface layer, the layer was partially cured i.e., partially crosslinked and dried. The layer was subsequently provided with a textile ink forming a visual feature on the textile. The layer including the textile ink was dried in an oven in the typical manner for screen printed textile inks.
  • the sacrificial printable surface layer comprising the textile ink could be washed in cold (room temperature, less than about 40°C) water without removing either the sacrificial printable surface layer, or the textile ink deposited thereon.
  • Anionic starch (Perfectamyl®, Avebe) was dissolved in water at an amount of 16%.
  • a crosslinking agent 1,2,3,4-Butanetetracarboxylic acid (BTC A) was added to the aqueous solution at an amount of 10% compared to the dry weight of the anionic starch.
  • a plasticiser glycerol, was added to the aqueous solution at an amount of 10% compared to the dry weight of anionic starch.
  • the aqueous solution comprising the anionic starch, crosslinking agent and plasticiser was heated for 20 minutes at 90 °C.
  • the anionic and lower molecular weight starch resulted in an aqueous solution being substantially less viscous and aggregates did not form.
  • the viscosity of the solution was increased via the addition of cellulose nanofibrils (CNF) having a dry content of 8% (Sappi, Valida) at an amount of 30% compared to the dry weight of the anionic starch.
  • CNF cellulose nanofibrils
  • the mixture was cooled in an ice bath to prevent the retrogradation/recrystallisation of starch.
  • a polymer dispersion (Alberdingk® Acrylic Copolymer Dispersion AC 2007) was added at an amount of approximately 700% compared to the weight of dry starch and homogenised.
  • the total components of the liquid composition are detailed in the table below.
  • the liquid composition was screen-printed onto the surface of a textile, a white single Jersey cotton t-shirt, forming the sacrificial printable surface layer.
  • the liquid composition showed improved deposition properties compared to the liquid composition of experiment 1. Aggregates were avoided in the deposition process and the layer was possible to deposit uniformly to the textile surface.
  • the layer was partially crosslinked and dried.
  • the sacrificial printable surface layer was flash dried for between 2 and 10 seconds to partially cure the liquid composition.
  • the layer was subsequently provided with a textile ink forming a visual feature on the textile.
  • the layer including the textile ink was dried in an oven in the typical manner for screen printed textile inks.
  • the sacrificial printable surface layer comprising the textile ink could be washed in warm (about 40 °C) water without removing either the sacrificial printable surface layer, or the textile ink deposited thereon.
  • a composition comprising a different polysaccharide was prepared.
  • the anionic starch from experiment 2 was substituted with pectin. It was noted that when pectin was used, a viscosity modifier such as CNF was not necessary and could be excluded from the composition. Pectin showed better film formation and an improved response to enzymatic degradation compared to cationic/anionic starch.
  • the liquid composition comprising pectin further had improved printability, removability and washability.
  • the total components of the liquid composition are detailed in the table below.
  • the liquid composition was screen-printed onto the surface of a textile, a white single Jersey cotton t-shirt, forming the sacrificial printable surface layer.
  • the liquid composition showed improved film forming properties and improved printability compared to the liquid compositions of experiment 1 and 2.
  • the layer was partially crosslinked and dried.
  • the sacrificial printable surface layer was flash dried for between 2 and 10 seconds to partially cure the liquid composition.
  • the layer was subsequently provided with a textile ink forming a visual feature on the textile.
  • the layer including the textile ink was dried in an oven in the typical manner for screen printed textile inks.
  • the sacrificial printable surface layer comprising the textile ink could be washed in warm (about 40 °C) water without removing either the sacrificial printable surface layer, or the textile ink deposited thereon.
  • the liquid composition of experiment 3 displayed improved washability compared to the compositions of experiment 1 and 2.
  • a removal solution was prepared.
  • the removal solution was prepared to remove the liquid composition according to experiments 1 and 2 comprising cationic and anionic starch.
  • the removal solution comprised 74% water by total weight of the solution, 15% acetone by total weight of the solution, propylene carbonate 5% by total weight of the solution.
  • the removal solution further comprised two synthetic alcohol ethoxylate surfactants, Noury on Ethylan® 1005 and Noury on Ethylan® 1008 at a total amount of 6% by total weight of the solution.
  • An enzyme, alpha-amylase, in solution was added to the resulting solution at an amount of 0.4% based on the total volume of the solution prior to the addition of the alpha-amylase.
  • the alpha-amylase solution was Sigma Aldrich a- amylase from Bacillus licheniformis in saline having a concentration of greater than 500 units per mg (A3403).
  • the total components of the liquid composition are detailed in the table below.
  • the textiles comprising the sacrificial printable surface layer and textile inks prepared according to experiments 1 and 2 were immersed in the removal solution.
  • the removal solution removed the sacrificial printable surface layer and the textile inks. Some mechanical treatment was required to remove the sacrificial printable surface layer and textile inks from the textile.
  • a removal solution to remove the sacrificial printable surface layer provided in experiment 3 was prepared.
  • the removal solution comprises pectinase comprising pectinase from Aspergillus aculeatus in aqueous solution having greater than 3,800 units/ml (MDL: MFCD00131809, Sigma- Aldrich) in order to enzymatically degrade the pectin.
  • MDL MFCD00131809, Sigma- Aldrich
  • the total components of the liquid composition are detailed in the table below.
  • Textile comprising a sacrificial printable surface layer prepared according to experiment 3 were immersed in the removal solution.
  • the liquid composition according to experiment 2 was prepared, however, the amount of polymer dispersion was decreased to correspond to only 30% of the dry weight of starch (compared to 700% in experiment 2).
  • the total components of the liquid composition are detailed in the table below.
  • the liquid composition was screen-printed onto the surface of a textile, a white single Jersey cotton t-shirt, forming the sacrificial printable surface layer.
  • the layer was partially cured i.e., partially crosslinked and dried.
  • the sacrificial printable surface layer was flash dried for between 2 and 10 seconds to partially cure the liquid composition.
  • the layer was subsequently provided with a textile ink forming a visual feature on the textile.
  • the textile was washed in warm (40 °C) water.
  • the sacrificial printable surface layer and the textile inks were removable in water alone.
  • Experiment 7 Preparation and deposition of a sacrificial printable surface layer for printing and subsequent removal via water having improved homogeneity and coverage.
  • the sacrificial printable surface layer removable in water according to experiment 5 was modified to have improved homogeneity and coverage when printing. These improvements were achieved by the introduction of the viscosity modifier, a water soluble cellulose ether, ethyl hydroxyethyl cellulose, (Bermocoll® E 230 X, Nouryon). The amount of CNF was reduced and functioned as a stability enhancer in the composition. A low water fastness polymer dispersion was found to enable an increase in polymer dispersion content and thereby improve printability and film forming.
  • Primer coverage was significantly improved by increasing the solid content of the composition via the addition of calcium carbonate.
  • the total components of the liquid composition are detailed in the table below.
  • the liquid composition of experiment 7 was screen-printed onto the surface of a textile, a white single Jersey cotton t-shirt, forming the sacrificial printable surface layer.
  • the layer was partially cured i.e., partially crosslinked and dried.
  • the sacrificial printable surface layer was flash dried for between 2 and 10 seconds to partially cure the liquid composition.
  • the layer was subsequently provided with a textile ink forming a visual feature on the textile.
  • the textile was washed in warm (40 °C) water.
  • the sacrificial printable surface layer and the textile inks were removable in water alone.

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Abstract

A process for providing a textile with a sacrificial printable surface layer comprising, depositing a liquid composition to the textile The liquid composition comprising: a crosslinkable biopolymer composition, the biopolymer composition comprising at least one biopolymer, the biopolymer in its crosslinked state, being degradable via enzymatic degradation; and a film-forming polymer dispersion. The process comprising drying each of, and at least partially crosslinking at least one of, the polymer dispersion and biopolymer composition, to form the sacrificial printable surface layer.

Description

PROCESS FOR PROVIDING SACRIFICIAL PRINTABLE SURFACE LAYERS TO A TEXTILE
Field of the Invention
The present disclosure relates to processes for providing a sacrificial printable surface layer to a textile. The sacrificial printable surface layer comprises a biopolymer and a film-forming polymer dispersion.
Background of the invention
The textile production industry is estimated to be responsible for around 10% of total global green-house gas emissions. The emissions from the textile production industry are greater than the combined emissions from maritime and flight emissions. The emissions come substantially from the production process of textiles, therefore, prolonging the lifetime of products may substantially decrease emissions.
Often textiles are provided with prints, via the application of one or several textile inks often in the form of layers, to provide a visual feature or pattern. In order to reuse textiles, extending their lifetime and reducing total industry emissions due to increased individual product lifetime, it would be ideal if the visual feature could be removed at some time in the future after application. The provision of a process for providing a textile with a visually appealing print which is capable of being worn in the normal fashion, including washed etc. but still capable of being removed when desired would be ideal.
Furthermore, the textile printing industry is well-established and many processes are established and well-defined, including traditional textile ink compositions and processes for ink application. A process capable of increasing the lifetime of textiles with ink prints whilst cooperating with the standard industry processes would be ideal.
Summary of the invention
Accordingly, the present invention preferably seeks to mitigate, alleviate or eliminate one or more of the above-identified deficiencies in the art and disadvantages singly or in any combination and solves at least the above mentioned problems by providing a process for providing a textile with a sacrificial printable surface layer comprising, depositing a liquid composition to the textile. The liquid composition comprising: a crosslinkable biopolymer composition, the biopolymer composition comprising at least one biopolymer, the biopolymer in its crosslinked state, being degradable via enzymatic degradation; and a film-forming polymer dispersion. The process further comprising drying each of, and at least partially crosslinking at least one of, the polymer dispersion and biopolymer composition, to form the sacrificial printable surface layer.
The sacrificial printable surface layer is ideal for existing textile ink deposition processes such as screen-printing applications presently used for providing textile inks to textiles to form visual features. The sacrificial printable surface layer may be machine washable such that it is substantially not removed when washed in water.
A process for printing a visual feature on a textile is provided.
A removal solution is provided and a process for removing a sacrificial printable surface layer is provided. The sacrificial printable surface layer may be removed via a removal solution. After removal the textile may be reused, such as used as-is or reprinted with a new sacrificial printable surface layer and textile ink to form a new visual feature.
A textile comprising a sacrificial printable layer is provided.
A process for removing a sacrificial printable surface layer from a textile is provided.
Further advantageous embodiments are disclosed in the appended and dependent patent claims.
Detailed description
The present disclosure relates to the provision of a sacrificial printable surface layer to a textile. The sacrificial printable surface layer enables a textile ink to be deposited on to the sacrificial printable surface layer. The textile with the sacrificial printable surface layer and the textile ink deposited thereupon may be used in the normal fashion. That is, the textile if it is a garment may be worn, washed etc. The sacrificial printable surface layer may thereafter be removed. Removal of the sacrificial printable surface layer removes not only the sacrificial printable surface layer but also the textile ink. The garment is therefore returned to its original state, comprising neither the sacrificial printable surface layer nor the textile ink. The provision of the sacrificial printable layer provides a process for re-using textiles that have been provided with textile inks. Thereby prolonging the potential lifetime of the textile and reducing total greenhouse gas emissions in textile production.
The present inventors have identified that a sacrificial printable surface layer may be provided by the deposition of a composition comprising a crosslinkable biopolymer composition and a film-forming polymer dispersion. The composition is applied to the textile and forms a surface layer on the textile. The composition may be dried and at least partially crosslinked to provide a surface upon which a textile ink may be deposited. That is, a separate layer of textile ink may be deposited on the sacrificial printable surface layer. The components of the sacrificial printable surface layer are not additional ink components provided to a textile ink composition, but rather a separate composition applied separately and prior to the deposition of the textile ink.
The crosslinkable biopolymer composition comprises at least one crosslinkable biopolymer. That is, the biopolymer of the biopolymer composition is crosslinkable. Generally, the biopolymer is chemically crosslinkable. The polymer chains of the biopolymer may also physically entangle causing physical crosslinking. The crosslinked biopolymer composition is degradable via enzymatic degradation. That is, the crosslinked biopolymer is susceptible to degradation via one or several enzymes.
The biopolymer composition may comprise a polysaccharide as the crosslinkable biopolymer.
The biopolymer composition may comprise amylose and amylopectin. The crosslinkable biopolymer may be starch. Starch is degradable via enzymatic degradation, hydrolysed, by hydrolytic enzymes such as the amylases alpha-amylase, beta-amylase, and gamma-amylase. The starch may be potato starch or modified starch, such as an acetylated potato starch. Other starches, such as starches from com, quinoa etc. may also be suitable. The starch may be non-ionic, cationic, or anionic. As shown in the experimental section, anionic starch has shown improved dissolution properties compared to cationic starch. A cationic starch may be for example, Amylofax, (Avebe). An anionic starch may be for example, Perfectamyl, (Avebe) which has displayed suitable properties as the crosslinkable biopolymer as it dissolves well in aqueous solutions and avoids the formation of aggregates in aqueous solutions.
The biopolymer composition may comprise pectin. That is, the biopolymer of the biopolymer composition may be pectin. The biopolymer composition may comprise high methylester (HME) pectin. Biopolymer compositions comprising pectin have shown better film forming properties and have an improved response to enzymatic degradation than starch. Additionally, biopolymer compositions comprising pectin have displayed improved printability and washability compared to compositions comprising starch.
The biopolymer composition may comprise a plurality of different bio- polymers/monomers. For example, the biopolymer composition may comprise starch and pectin. Each of the biopolymers when crosslinked are selected such that they are susceptible to enzymatic degradation via one or several enzymes.
The film-forming polymer dispersion comprises a polymer not being a biopolymer, and specifically not the biopolymer in the biopolymer composition. The film-forming polymer dispersion generally comprises a high molecular weight polymer in an aqueous dispersion. The film-forming polymer dispersion may be an aqueous copolymer dispersion. The film-forming polymer may be a versatate acrylic polymer dispersion. The film-forming polymer being a polymer dispersion may be referred to as a latex, i.e., a synthetic latex.
The solids content of the polymer dispersion may be from about 40% to about 60%, such as from about 42% to about 48%. The polymer dispersion may have a viscosity of from about 5 to about 5000 mPas, such as from about 5 to about 3000 mPas, or from about 500 to about 2000 mPas, according to ISO 2555 (Brookfield RVT Spindle 3, RPM 20, factor 50) which have been shown to be suitable for screen printing applications. The particle size of the polymer dispersion may be from about 50 nm to about 500 nm, such as from about 80 nm to about 200 nm. The polymer dispersion may be, for example, AC 2007 (Alberdingk®), CHP 570 (CH Polymers Oy), Tubicoat A19 (CHT Germany GmbH), or other suitable polymer dispersions.
As detailed in the experimental section, a film-forming polymer dispersion having a reduced water fastness when compared to AC 2007 enables an increased amount of polymer dispersion in the liquid composition, providing improved film-forming and satisfactory removal properties. Water fastness refers to the stability of the film forming polymer dispersion when immersed in water at ambient temperatures.
The liquid composition is generally an aqueous composition comprising water, the biopolymer composition, and the polymer dispersion. The aqueous liquid composition may comprise from about 10% to about 90% water based on the total weight of the liquid composition, such as from about 50% to about 85%. The liquid composition may comprise the biopolymer composition at an amount of from about 1% to about 20% based on the total weight of the composition, such as from about 2% to about 10%. The liquid composition may comprise the polymer dispersion at an amount of from about 1% to about 50%, such as from about 1% to about 2% to about 30%. The liquid composition may comprise a crosslinking agent at an amount from about 0.05% to about 5% based on the total weight of the liquid composition.
To achieve the crosslinking between the biopolymer molecules in the biopolymer composition a crosslinking agent may be added to the biopolymer composition. An example of such a crosslinking agent is 1,2,3,4-Butanetetracarboxylic acid (BTCA). As stated above, the crosslinking agent for the biopolymer composition may be present at an amount of 0.05% to about 5% based on the total weight of the liquid composition, ideally the crosslinking agent is present at an amount of from about 0.4% to about 1%.
The film-forming polymer dispersion may comprise a crosslinking agent. Therefore, the liquid composition may comprise a crosslinking agent in addition to the crosslinking agent selected for the biopolymer composition. Such polymer dispersions may be referred to as self-crosslinking polymer dispersions. The crosslinking agent in the polymer dispersion may selectively crosslink only the polymer of the polymer dispersion, or may additionally crosslink the biopolymer and the polymer in the polymer dispersion.
The biopolymer composition may comprise cellulose nanofibrils (CNF). The CNF may be provided in addition to the crosslinkable biopolymer. The addition of CNF to the biopolymer composition increases the viscosity of the biopolymer composition. The high aspect ratio of the CNF may additionally provide increased attachment surfaces for crosslinking the biopolymer compared to a biopolymer composition without CNF, thereby enhancing the strength and of the crosslinked biopolymer network. The CNF may be provided at an amount of from about 0.1% to about 5%, such as about 1.5 to about 2%. The CNF has been shown to substantially increase the viscosity and stability of the aqueous liquid composition at an amount of less than 2%, which is suitable for printability with e.g., screen printing processes.
The liquid composition may comprise at least one plasticiser. The plasticiser improves the film surface and mechanical properties and thereby improves the physical properties of the sacrificial layer for subsequent textile ink printing. The plasticiser may be present at an amount of from about 0.1% to about 5%, such as about 0.1% to about 1% based on the total weight of the aqueous liquid composition. The plasticiser may be for example glycerol, dipropylene glycol and/or polyethylene glycol 200. Advantageously, the liquid composition may comprise several plasticisers to achieve improved printability.
Varying the comparative amounts of biopolymer composition, the components of the biopolymer composition, and the solid polymer in the polymer dispersion to each other has been shown to vary the properties of the deposited layer. Properties here refers to at least the suitability for receiving a textile ink, and washability of the sacrificial printable surface layer.
The liquid composition may comprise the biopolymer composition at an amount of greater than about 1% based on the total weight of the liquid composition including water. The liquid composition may comprise the polymer dispersion at an amount of greater than about 1 % based on the total weight of the liquid composition including water. The liquid composition may comprise the biopolymer at an amount of from about 2% to about 10%. The liquid composition may comprise the polymer dispersion at an amount of from about 1% to about 30%, such as from about 15% to about 30%. Examples of suitable compositions are provided in the experimental section.
The liquid composition may comprise a polysaccharide to polymer dispersion ratio of at least 1:0.1 (polysaccharide:polymer in polymer dispersion). The liquid composition may have a ratio of at least 1:1 (polysaccharide:polymer in polymer dispersion), such as at least 1:2 (polysaccharide:polymer in polymer dispersion). That is, the solid polymer in the polymer dispersion to polysaccharide ratio may be at least 0.1:1, such as 1: 1, such as 2:1. The higher the polymer solid content with respect to the biopolymer in the composition generally results in layers which have improved durability and in particular washability. All ratios are with respect to the dry weight of the respective components in the liquid composition.
To form the sacrificial printable surface the liquid composition is provided to the textile in solution, that is, the liquid composition is applied wet. After application to the textile, the liquid composition comprising the biopolymer composition is dried and at least partially crosslinked. The polymer dispersion comprised in the liquid composition is also at least dried. The polymer dispersion is ideally also crosslinked after application to the textile. The crosslinking of the biopolymer composition and the polymer dispersion may occur simultaneously, that is, there need not be separate crosslinking steps.
As stated above, to form the sacrificial printable surface layer, the liquid composition is dried, cured, prior to the application of the textile ink to the surface layer. The drying may at least partially crosslink both the biopolymer composition and the polymer dispersion. Neither the biopolymer composition nor the polymer dispersion need be fully crosslinked to form the sacrificial printable surface layer. The liquid composition comprising the biopolymer composition and the polymer dispersion, however, must be sufficiently dry prior to the application of the textile ink.
When applied to form the sacrificial printable layer, the polymer dispersion is supported physically by the at least partially crosslinked biopolymer. The crosslinkable biopolymer composition forms a polymer network which physically and chemically supports the polymer dispersion and textile ink.
The drying and at least partial crosslinking of the liquid composition comprising the polymer dispersion and the biopolymer composition forms covalent chemical and/or physical crosslinks between at least the biopolymer molecules in the biopolymer composition. The at least partial crosslinking may form chemical crosslinks between the biopolymer molecules in the biopolymer composition and the polymers in the polymer dispersion. That is, the biopolymer molecules are at least crosslinked to each other, and may be crosslinked to the polymers in the polymer dispersion. The partial crosslinking may additionally form chemical crosslinks between the polymers in the polymer dispersion. A process for providing a textile with a sacrificial printable surface layer comprises: depositing a liquid composition to the textile, and, drying and at least partially crosslinking the biopolymer in the liquid composition. As described above, the liquid composition comprises a crosslinkable biopolymer composition. The biopolymer composition comprises at least one biopolymer which is crosslinkable. The biopolymer in its crosslinked state is capable of degradation via enzymatic degradation. The liquid composition further comprises a polymer dispersion. The liquid composition is at least partially cured after it has been applied to the textile. The drying and at least partial crosslinking forms a partially solid, at least partially crosslinked layer upon which a traditional textile printing ink may be deposited. Partially solid refers to the layer being suitable for receiving, and forming a surface upon which, a textile ink may be deposited without interacting with the underlying textile. The sacrificial printable surface layer prevents the textile ink from interacting with and contacting the textile.
The deposited and at least partially cured sacrificial printable layer is generally substantially colourless. The deposited layer forms as a substantially colourless film on the textile. It is understood that if a coloured composition is desired, the liquid composition and therefore deposited layer may be coloured with colouring additives.
After provision to the textile, the sacrificial printable surface layer on the textile may be provided with textile ink to form a printed feature to the textile. The printing process may be any normal textile printing process such as screen printing, rotary screen printing, or other printing techniques used to deposit a textile ink layer. In particular, screen printing/ silkscreen printing of a textile ink to the sacrificial printable surface layer has been shown to form washable, vibrant coloured features to textiles. As is typical in a screen-printing process, the textile ink is cured after deposition. The curing process of the textile ink may further crosslink the components of the liquid composition, that is, the biopolymer composition and the polymer dispersion. Therefore, the drying and partial crosslinking step of the process for applying the sacrificial printable surface layer may be complemented by a further crosslinking step which simultaneously cures the textile ink, and additionally crosslinks at least the biopolymer composition.
As was described above, the present disclosure relates to a sacrificial printable surface layer, which may be removed, thus removing the both the sacrificial printable surface layer and additionally any textile inks which may have been deposited on the sacrificial printable surface layer.
In some instances, the sacrificial printable surface layer is removable in water alone. Such sacrificial printable surface layers are detailed in experiments 6 and 7. As would be understood, a sacrificial printable surface layer which is removable in water alone is not suitable for repeated use and washing. In some instances, the sacrificial printable surface layer is removable in an aqueous removal solution comprising components in addition to water to degrade the biopolymer composition and polymer dispersion. If the sacrificial printable surface is not degradable in water alone, the textile may be used several times, washed etc. without substantially degrading the appearance of the print provided to the textile, or the sacrificial printable surface layer.
A removal solution for removing the sacrificial printable surface layer from a textile comprises a component for swelling the film formed by the film-forming polymer dispersion, and a component for degrading the crosslinked biopolymer. The removal solution is generally aqueous. The majority of the removal solution may be water. The component for swelling the polymer dispersion film is generally an organic solvent for swelling the film formed by the film-forming polymer dispersion. The component for degrading the crosslinked biopolymer may generally be an enzyme for hydrolysing or otherwise degrading the crosslinked biopolymer. The organic solvent swells but generally does not dissolve the polymer issued from the polymer dispersion as the polymer dispersion generally comprises high molecular weight polymers which are not easily dissolved in organic solvents. An organic solvent selected such that it has good polymer interaction will migrate within the polymer network causing it to swell. The enzyme selected to degrade the crosslinked biopolymer will break the biopolymer network via for example, hydrolysis. The two-component removal solution therefore will degrade both components of the sacrificial printable surface layer and enable it to be removed from the textile surface.
The enzyme is selected to degrade the biopolymer. Different enzymes may be selected depending on the specific biopolymer used in the sacrificial printable surface layer. For example, if the biopolymer composition comprises polysaccharide susceptible to degradation via alpha-amylase, then the enzyme in the removal solution may be alpha- amylase. Similarly, if the biopolymer composition comprises for example pectin, then the removal solution may comprise pectinase. The removal solution may comprise from 0.05% to about 5% vol. enzyme solution having a concentration of greater than 500 units per mg, based on the volume of the solution prior to the addition of the enzyme solution. The removal solution may comprise from about 0.1% to about 2% enzyme solution, such as about from about 0.2% to about 1.5% enzyme solution.
The removal solution is generally an aqueous solution comprising at least about 10% organic solvent based on the total weight of the aqueous solution. The removal solution may comprise at least two polar organic solvents. The first polar organic solvent may be provided at an amount of at least about 10%. The second polar organic solvent, a cosolvent, may be present at an amount of at least 3%, such as at least 5%, based on the total weight of the aqueous removal solution. The first polar organic solvent may be for example acetone or advantageously, dipropylene glycol dimethyl ether, DME. Dipropylene glycol DME is advantageous as it is inert and non-toxic whilst maintaining effective performance with the polymer dispersions of the present application. The second polar organic solvent may be for example propylene carbonate. In some instances, the second polar organic solvent may be excluded, and the removal solution may comprise only the first polar organic solvent.
Advantageously the removal solution comprises at least one surfactant at an amount of from about 1% to about 10%, such as about 5%. The surfactant is ideally a non-ionic surfactant. The removal solution may comprise at least two non-ionic surfactants, such as a mixture with hydrophilic-lipophilic balance, HLB, between 5 and 17. The surfactant(s) may be a synthetic alcohol ethoxy late/alkoxylate suitable for aqueous solutions. The surfactant enhances at least the swelling of the polymer dispersion film.
The process for removing the sacrificial printable surface layer comprises providing the removal solution to the textile comprising the sacrificial printable surface layer. The provision of the removal solution may be via washing, spraying, immersion etc. The component of the removal solution for swelling the polymer dispersion film swells the film formed by the polymer dispersion on the surface of the textile. The component for degrading the biopolymer network degrades the crosslinked biopolymer on the surface of the textile. The process for removing the sacrificial printable layer may comprise mechanically agitating the textile, for example, via washing in a washing machine, to physically agitate and remove the sacrificial printable surface layer from the surface of the textile. The agitation may occur in the aqueous removal solution, such that the textile comprising the sacrificial printable surface layer is at least partially immersed in the removal solution during mechanical agitation. The process may comprise pretreating the sacrificial printable surface layer with the removal solution and then agitation in an aqueous solution comprising traditional washing detergents.
The removal process results in the removal of the sacrificial printable surface layer, and any textile inks deposited thereon, and therefore enables the textile to be reused. The textile may subsequently be provided with a new sacrificial printable surface layer. The textile may thereafter be provided with a newly deposited textile ink upon the newly deposited sacrificial printable surface layer.
In some instances it may be ideal to provide a sacrificial printable surface layer which may be removed in water alone, that is, without the need for a removal solution which swells the polymer dispersion and/or degrades the crosslinked biopolymer. In such cases the amount of biopolymer is increased compared to the amount of polymer dispersion. That is, the ratio of biopolymer to polymer solid in the polymer dispersion is increased. Such a liquid composition is described in experiments 6 and 7. Such a sacrificial printable layer may be removable in water alone. Ideally, for a sacrificial printable layer for removal in water alone, the biopolymer composition comprises starch.
A textile produced according to the process for providing a sacrificial printable surface layer comprises a textile, a surface of the textile having a layer provided thereon, the layer comprising an at least partially crosslinked biopolymer composition and a filmforming polymer dispersion. The at least partially crosslinked biopolymer composition and the polymer dispersion form a single layer. The single layer is for receiving a printable textile ink. The single layer is substantially colourless. The sacrificial printable surface layer may be provided with a textile ink such that a visual feature is provided to the textile upon the sacrificial printable surface layer. The textile which forms the substrate for the printable surface layer, may be cotton, polycotton, polyester or any textile suitable for receiving a textile ink print. Experimental Section
Experiment 1: Preparation and deposition of a sacrificial printable surface layer comprising cationic starch.
Cationic starch (Amylofax®, Avebe) as the biopolymer was dissolved in water at an amount of 6.6%. When dissolved and heated in water the cationic starch is very viscous. The starch was cooked for 20 minutes and stirred to hinder the formation of large particles. The solution was then cooled and stirred until it reached room temperature.
Citric acid was provided as a crosslinking agent at an amount of 10% compared to the dry weight of cationic starch. A catalyst, sodium hypophosphate, was added at an amount of 5% compared to the dry weight of the cationic starch. Glycerol was added at 10% compared to the dry weight of the starch.
A polymer dispersion (Alberdingk® Acrylic Copolymer Dispersion AC 2007) was added at an amount of 600% compared to the dry weight of the cationic starch. The opposite charge of the polymer dispersion-biopolymer caused coagulation and the catalyst destabilises and created precipitates in the solution.
The total components of the liquid composition are detailed in the table below.
The liquid composition was screen-printed onto the surface of a textile, a white single Jersey cotton t-shirt, forming the sacrificial printable surface layer. Due to the formation of aggregates the surface layer was comparatively difficult to handle.
The screen-printed liquid composition was flash dried for between 2 and 10 seconds to partially cure the liquid composition. After screen-printing of the sacrificial surface layer, the layer was partially cured i.e., partially crosslinked and dried. The layer was subsequently provided with a textile ink forming a visual feature on the textile. The layer including the textile ink was dried in an oven in the typical manner for screen printed textile inks.
The sacrificial printable surface layer comprising the textile ink could be washed in cold (room temperature, less than about 40°C) water without removing either the sacrificial printable surface layer, or the textile ink deposited thereon.
Experiment 2: Preparation and deposition of a sacrificial printable surface layer comprising anionic starch.
Anionic starch (Perfectamyl®, Avebe) was dissolved in water at an amount of 16%. A crosslinking agent, 1,2,3,4-Butanetetracarboxylic acid (BTC A) was added to the aqueous solution at an amount of 10% compared to the dry weight of the anionic starch. A plasticiser, glycerol, was added to the aqueous solution at an amount of 10% compared to the dry weight of anionic starch. The aqueous solution comprising the anionic starch, crosslinking agent and plasticiser was heated for 20 minutes at 90 °C.
Compared to experiment 1, the anionic and lower molecular weight starch resulted in an aqueous solution being substantially less viscous and aggregates did not form. The viscosity of the solution was increased via the addition of cellulose nanofibrils (CNF) having a dry content of 8% (Sappi, Valida) at an amount of 30% compared to the dry weight of the anionic starch.
The mixture was cooled in an ice bath to prevent the retrogradation/recrystallisation of starch. A polymer dispersion (Alberdingk® Acrylic Copolymer Dispersion AC 2007) was added at an amount of approximately 700% compared to the weight of dry starch and homogenised.
The total components of the liquid composition are detailed in the table below.
The liquid composition was screen-printed onto the surface of a textile, a white single Jersey cotton t-shirt, forming the sacrificial printable surface layer. The liquid composition showed improved deposition properties compared to the liquid composition of experiment 1. Aggregates were avoided in the deposition process and the layer was possible to deposit uniformly to the textile surface.
After screen-printing of the sacrificial printable surface layer, the layer was partially crosslinked and dried. The sacrificial printable surface layer was flash dried for between 2 and 10 seconds to partially cure the liquid composition.
The layer was subsequently provided with a textile ink forming a visual feature on the textile. The layer including the textile ink was dried in an oven in the typical manner for screen printed textile inks.
The sacrificial printable surface layer comprising the textile ink could be washed in warm (about 40 °C) water without removing either the sacrificial printable surface layer, or the textile ink deposited thereon.
Experiment 3: Preparation and deposition of a sacrificial printable surface layer comprising pectin.
A composition comprising a different polysaccharide was prepared. The anionic starch from experiment 2 was substituted with pectin. It was noted that when pectin was used, a viscosity modifier such as CNF was not necessary and could be excluded from the composition. Pectin showed better film formation and an improved response to enzymatic degradation compared to cationic/anionic starch. The liquid composition comprising pectin further had improved printability, removability and washability.
The total components of the liquid composition are detailed in the table below.
The liquid composition was screen-printed onto the surface of a textile, a white single Jersey cotton t-shirt, forming the sacrificial printable surface layer. The liquid composition showed improved film forming properties and improved printability compared to the liquid compositions of experiment 1 and 2.
After screen-printing of the sacrificial printable surface layer, the layer was partially crosslinked and dried. The sacrificial printable surface layer was flash dried for between 2 and 10 seconds to partially cure the liquid composition.
The layer was subsequently provided with a textile ink forming a visual feature on the textile. The layer including the textile ink was dried in an oven in the typical manner for screen printed textile inks.
The sacrificial printable surface layer comprising the textile ink could be washed in warm (about 40 °C) water without removing either the sacrificial printable surface layer, or the textile ink deposited thereon. The liquid composition of experiment 3 displayed improved washability compared to the compositions of experiment 1 and 2.
When removed with the removal solution according to experiment 5 (comprising pectinase) the layer was more easily removable than the composition of experiment 2 when removed with the removal solution according to experiment 4.
Experiment 4: Removal of the sacrificial printable surface layer via a removal solution.
A removal solution was prepared. The removal solution was prepared to remove the liquid composition according to experiments 1 and 2 comprising cationic and anionic starch. The removal solution comprised 74% water by total weight of the solution, 15% acetone by total weight of the solution, propylene carbonate 5% by total weight of the solution. The removal solution further comprised two synthetic alcohol ethoxylate surfactants, Noury on Ethylan® 1005 and Noury on Ethylan® 1008 at a total amount of 6% by total weight of the solution. An enzyme, alpha-amylase, in solution was added to the resulting solution at an amount of 0.4% based on the total volume of the solution prior to the addition of the alpha-amylase. The alpha-amylase solution was Sigma Aldrich a- amylase from Bacillus licheniformis in saline having a concentration of greater than 500 units per mg (A3403).
The total components of the liquid composition are detailed in the table below. The textiles comprising the sacrificial printable surface layer and textile inks prepared according to experiments 1 and 2 were immersed in the removal solution.
The removal solution removed the sacrificial printable surface layer and the textile inks. Some mechanical treatment was required to remove the sacrificial printable surface layer and textile inks from the textile.
Experiment 5: Removal of the sacrificial printable surface layer comprising pectin.
A removal solution to remove the sacrificial printable surface layer provided in experiment 3 was prepared. The removal solution comprises pectinase comprising pectinase from Aspergillus aculeatus in aqueous solution having greater than 3,800 units/ml (MDL: MFCD00131809, Sigma- Aldrich) in order to enzymatically degrade the pectin. The pectinase was provided in an amount of 1.1%.
The total components of the liquid composition are detailed in the table below.
Textile comprising a sacrificial printable surface layer prepared according to experiment 3 were immersed in the removal solution.
As noted in experiment 3, the removal solution prepared according to experiment 5 satisfactorily removed the sacrificial printable surface layer, and textile inks prepared according to experiment 3.
Experiment 6: Preparation and deposition of a sacrificial printable surface layer for printing and subsequent removal via water.
In order to provide a sacrificial printable surface which is capable of degradation in water alone, and does not require a specific removal solution, a further liquid composition was prepared.
The liquid composition according to experiment 2 was prepared, however, the amount of polymer dispersion was decreased to correspond to only 30% of the dry weight of starch (compared to 700% in experiment 2). An additional plasticiser, polyethylene glycol 200, was added to reduce brittleness and improve the strength of the sacrificial printable layer when dried.
The total components of the liquid composition are detailed in the table below.
The liquid composition was screen-printed onto the surface of a textile, a white single Jersey cotton t-shirt, forming the sacrificial printable surface layer. After screen-printing of the sacrificial surface layer, the layer was partially cured i.e., partially crosslinked and dried. The sacrificial printable surface layer was flash dried for between 2 and 10 seconds to partially cure the liquid composition. The layer was subsequently provided with a textile ink forming a visual feature on the textile.
To remove the sacrificial printable surface layer, and the textile inks provided thereon, the textile was washed in warm (40 °C) water. The sacrificial printable surface layer and the textile inks were removable in water alone.
Experiment 7: Preparation and deposition of a sacrificial printable surface layer for printing and subsequent removal via water having improved homogeneity and coverage.
The sacrificial printable surface layer removable in water according to experiment 5 was modified to have improved homogeneity and coverage when printing. These improvements were achieved by the introduction of the viscosity modifier, a water soluble cellulose ether, ethyl hydroxyethyl cellulose, (Bermocoll® E 230 X, Nouryon). The amount of CNF was reduced and functioned as a stability enhancer in the composition. A low water fastness polymer dispersion was found to enable an increase in polymer dispersion content and thereby improve printability and film forming.
Primer coverage was significantly improved by increasing the solid content of the composition via the addition of calcium carbonate.
The total components of the liquid composition are detailed in the table below. The liquid composition of experiment 7 was screen-printed onto the surface of a textile, a white single Jersey cotton t-shirt, forming the sacrificial printable surface layer.
After screen-printing of the sacrificial surface layer, the layer was partially cured i.e., partially crosslinked and dried. The sacrificial printable surface layer was flash dried for between 2 and 10 seconds to partially cure the liquid composition. The layer was subsequently provided with a textile ink forming a visual feature on the textile.
To remove the sacrificial printable surface layer, and the textile inks provided thereon, the textile was washed in warm (40 °C) water. The sacrificial printable surface layer and the textile inks were removable in water alone.
Although, the present invention has been described above with reference to specific embodiments, it is not intended to be limited to the specific form set forth herein. Rather, the invention is limited only by the accompanying claims.
In the claims, the term “comprises/comprising” does not exclude the presence of other elements or steps. Additionally, although individual features may be included in different claims, these may possibly advantageously be combined, and the inclusion in different claims does not imply that a combination of features is not feasible and/or advantageous. In addition, singular references do not exclude a plurality. The terms “a”, “an”, “first”, “second” etc do not preclude a plurality. Reference signs in the claims are provided merely as a clarifying example and shall not be construed as limiting the scope of the claims in any way.

Claims

CLAIMS A process for providing a textile with a sacrificial printable surface layer comprising:
- depositing a liquid composition to the textile, the liquid composition comprising:
- a crosslinkable biopolymer composition, the biopolymer composition comprising at least one biopolymer, the biopolymer in its crosslinked state, being degradable via enzymatic degradation; and,
- a film-forming polymer dispersion,
- drying each of, and at least partially crosslinking at least one of, the polymer dispersion and biopolymer composition, to form the sacrificial printable surface layer. The process according to claim 1, wherein the biopolymer composition is at least partially crosslinked. The process according to claim 1 or 2, wherein the sacrificial printable surface layer is substantially colourless. The process according to any of claims 1 to 3, wherein the biopolymer composition comprises a polysaccharide. The process according to claim 4, wherein the biopolymer composition comprises starch and/or pectin. The process according to claim 5, wherein the biopolymer composition comprises amylose and amylopectin. The process according to any of claims 1 to 6, wherein the liquid composition comprises the biopolymer at an amount of at least 1% based on the total weight of the composition. The process according to any of claims 1 to 7, wherein the liquid composition comprises the film-forming polymer dispersion at an amount of at least 1% based on the total weight of the composition. The process according to claim 7, wherein the liquid composition comprises the biopolymer at an amount of from about 2% to about 10%. The process according to claim 8 or 9, wherein the liquid composition comprises the film-forming polymer dispersion at an amount of from about 1% to about 30%, such as from about 15% to about 30%. The process according to any of claims 1 to 10, wherein the liquid composition comprises water. The process according to any of claims 1 to 11, wherein the at least partial crosslinking of the polymer dispersion and biopolymer composition forms chemical crosslinks and/or physical crosslinks between biopolymer molecules and the polymers in the polymer dispersion. The process according to any of claims 1 to 12, wherein the liquid composition is deposited to the textile by screen printing. A process for printing a textile comprising: performing the process according to any of claims 1 to 13, applying a textile ink on to the sacrificial printable surface layer, curing at least the textile ink to provide visual feature to the textile. An aqueous solution for removing a sacrificial printable surface layer from a textile, the sacrificial printable surface layer comprising a crosslinked biopolymer and a film-forming polymer dispersion, the solution comprising: an organic solvent for swelling the polymer dispersion film, and an enzyme for degrading the crosslinked biopolymer. The solution according to claim 15, wherein the solution comprises the organic solvent at an amount of at least 5%, such as at least 10%, based on the total volume of the solution, wherein the organic solvent is miscible with water. The solution according to claim 16, wherein the solution comprises at least two polar organic solvents, a first polar organic solvent miscible with water at an amount of at least 5% based on the total volume of the solution, and a second polar organic solvent at an amount of at least 1%, such as about 5% based on the total volume of the solution. The solution according to any of claims 15 to 17, wherein the solution comprises at least one surfactant. The solution according to any of claims 15 to 18, wherein the enzyme is a hydrolytic enzyme. Use of the solution according to any of claims 15 to 19, for removing a sacrificial printable surface layer provided to a textile.
A process for removing a sacrificial printable surface layer from a textile, comprising: providing a textile comprising a sacrificial printable surface layer, the sacrificial printable surface layer comprising: a biopolymer composition being at least partially crosslinked, and a film-forming polymer dispersion, providing a removal solution, the removal solution comprising: an organic solvent for swelling the polymer dispersion film, and an enzyme for degrading the at least partially crosslinked biopolymer, providing the removal solution to the textile such that the sacrificial printable layer is removed. The process according to claim 21, wherein the process comprises mechanically agitating the textile in the removal solution. A textile comprising a sacrificial printable surface layer, the sacrificial printable surface layer comprising a biopolymer composition being at least partially crosslinked, and a film-forming polymer dispersion, the sacrificial printable surface layer forming a single layer for receiving a textile ink. The textile according to claim 23, wherein the textile comprises a textile ink deposited on the sacrificial printable surface layer.
EP23825268.8A 2022-12-06 2023-12-01 Process for providing sacrificial printable surface layers to a textile Pending EP4630616A2 (en)

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US5605881A (en) * 1993-09-03 1997-02-25 Minolta Co., Ltd. Cleaning liquid for recycling copy medium for electrophotography
DE502004001325D1 (en) * 2003-10-10 2006-10-12 Dystar Textilfarben Gmbh & Co Method for modifying the odor properties of textiles
US20090196533A1 (en) * 2008-01-28 2009-08-06 Axis Co., Ltd. Shopping bag made of nonwoven fabric
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