EP4324964A1 - Textile yarn - Google Patents
Textile yarn Download PDFInfo
- Publication number
- EP4324964A1 EP4324964A1 EP23191623.0A EP23191623A EP4324964A1 EP 4324964 A1 EP4324964 A1 EP 4324964A1 EP 23191623 A EP23191623 A EP 23191623A EP 4324964 A1 EP4324964 A1 EP 4324964A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- yarn
- polyamide
- acacia gum
- weight
- textile
- 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
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- 239000004753 textile Substances 0.000 title claims abstract description 33
- 229920000084 Gum arabic Polymers 0.000 claims abstract description 38
- 239000000205 acacia gum Substances 0.000 claims abstract description 38
- 235000010489 acacia gum Nutrition 0.000 claims abstract description 38
- 239000004952 Polyamide Substances 0.000 claims abstract description 30
- 229920002647 polyamide Polymers 0.000 claims abstract description 30
- 239000000126 substance Substances 0.000 claims description 25
- 239000002202 Polyethylene glycol Substances 0.000 claims description 16
- 229920001223 polyethylene glycol Polymers 0.000 claims description 16
- UFTFJSFQGQCHQW-UHFFFAOYSA-N triformin Chemical compound O=COCC(OC=O)COC=O UFTFJSFQGQCHQW-UHFFFAOYSA-N 0.000 claims description 15
- 230000000379 polymerizing effect Effects 0.000 claims description 11
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 claims description 8
- 239000003755 preservative agent Substances 0.000 claims description 8
- 230000002335 preservative effect Effects 0.000 claims description 8
- 230000000844 anti-bacterial effect Effects 0.000 claims description 7
- BKYWPNROPGQIFZ-UHFFFAOYSA-N 2,4-dimethylbenzoic acid Chemical compound CC1=CC=C(C(O)=O)C(C)=C1 BKYWPNROPGQIFZ-UHFFFAOYSA-N 0.000 claims description 5
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 244000060011 Cocos nucifera Species 0.000 claims description 3
- 235000019482 Palm oil Nutrition 0.000 claims description 3
- 239000003240 coconut oil Substances 0.000 claims description 3
- 235000019864 coconut oil Nutrition 0.000 claims description 3
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 3
- 239000000194 fatty acid Substances 0.000 claims description 3
- 229930195729 fatty acid Natural products 0.000 claims description 3
- 150000004665 fatty acids Chemical class 0.000 claims description 3
- 239000002540 palm oil Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 description 15
- 238000001125 extrusion Methods 0.000 description 13
- 239000000463 material Substances 0.000 description 13
- 238000004458 analytical method Methods 0.000 description 11
- 239000000523 sample Substances 0.000 description 11
- 239000004744 fabric Substances 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 241000779819 Syncarpia glomulifera Species 0.000 description 6
- 238000000113 differential scanning calorimetry Methods 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 239000008188 pellet Substances 0.000 description 6
- 239000001739 pinus spp. Substances 0.000 description 6
- 229940036248 turpentine Drugs 0.000 description 6
- 229920000388 Polyphosphate Polymers 0.000 description 5
- 238000004128 high performance liquid chromatography Methods 0.000 description 5
- 239000001205 polyphosphate Substances 0.000 description 5
- 235000011176 polyphosphates Nutrition 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 239000000052 vinegar Substances 0.000 description 5
- 235000021419 vinegar Nutrition 0.000 description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- 239000004202 carbamide Substances 0.000 description 4
- 238000012512 characterization method Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 238000004885 tandem mass spectrometry Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- LADGBHLMCUINGV-UHFFFAOYSA-N tricaprin Chemical compound CCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCC)COC(=O)CCCCCCCCC LADGBHLMCUINGV-UHFFFAOYSA-N 0.000 description 2
- VLPFTAMPNXLGLX-UHFFFAOYSA-N trioctanoin Chemical group CCCCCCCC(=O)OCC(OC(=O)CCCCCCC)COC(=O)CCCCCCC VLPFTAMPNXLGLX-UHFFFAOYSA-N 0.000 description 2
- 238000001195 ultra high performance liquid chromatography Methods 0.000 description 2
- 235000013311 vegetables Nutrition 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 244000052363 Cynodon dactylon Species 0.000 description 1
- 239000004267 EU approved acidity regulator Substances 0.000 description 1
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 150000001793 charged compounds Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013375 chromatographic separation Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000001177 diphosphate Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012006 liquid chromatography with tandem mass spectrometry Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000001757 thermogravimetry curve Methods 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000003981 vehicle Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
Definitions
- the present invention relates to the field of textile materials.
- the subject matter of the present invention is an innovative textile yarn which can be used for example for making clothes, making bags, umbrellas, clothing accessories, furnishing products such as curtains, rugs and upholstery for indoor and outdoor furnishings and further for making wigs and extensions, etc.
- yarns generally consist of textile fibres of natural or synthetic origin.
- the fibres are generally provided with a colour which is inadequate for textile use and therefore the yarns (or fabrics) deriving therefrom them must be dyed.
- the textile market is always seeking new yarns capable of creating particular fabrics and visual effects on the final fabric.
- the object of the present invention is to make a textile yarn which allows to obtain visual effects on the final textile products which allow a particular three-dimensionality of the products themselves.
- Another important object of the present invention is to make a textile yarn which does not require colouring.
- Another important object of the present invention is to make a textile yarn which can be easily processed with the known art.
- a textile yarn comprising at least 10% acacia gum by weight on the weight of the yarn (w/w), and at least 5% polyamide by weight on the weight of the yarn (w/w).
- Such a yarn has a natural and a synthetic component and is substantially colourless, i.e., it is at least partly transparent.
- Such a yarn also combines the features of a thermosetting material, such as acacia gum, and a thermoplastic material, such as polyamide (for example in the form of hot-melt adhesive material).
- the textile yarn can be transparent or at least partially transparent, thanks to the adequate use of acacia gum.
- the yarn comprises at least 15% w/w of acacia gum
- the yarn comprises at least 20% w/w of acacia gum.
- the yarn comprises at least 30% w/w of acacia gum.
- the yarn comprises at least 40% w/w of acacia gum.
- the yarn comprises at most 70% w/w of acacia gum, or at most 60% w/w of acacia gum.
- the acacia gum can be comprised between 12% and 70% by weight on the weight of the yarn and more preferably comprised between 15% and 60%, and even more preferably comprised between 18% and 55% by weight on the weight of the yarn.
- the acacia gum is of the Kordofan type.
- the yarn comprises at least 10% w/w of polyam ide.
- the yarn comprises at least 20% w/w of polyamide.
- the yarn comprises at least 40% w/w of polyamide.
- the yarn comprises at most 70% w/w of polyamide.
- the yarn comprises at most 50% w/w of polyamide.
- the yarn comprises at most 30% w/w of polyamide.
- the polyamide is comprised between 10% and 70% by weight on the weight of the yarn and more preferably comprised between 12% and 65%, and even more preferably comprised between 15% and 55% by weight on the weight of the yarn.
- the polyamide comprises caprolactam and laurolactam, and more preferably caprolactam comprised between 50% and 70% and laurolactam comprised between 30% and 50%.
- the textile yarn also comprises a polymerizing substance, such as preferably polyethylene glycol (PEG).
- a polymerizing substance such as preferably polyethylene glycol (PEG).
- the yarn comprises at least 5% w/w of polymerizing substance.
- the yarn comprises at least 10% w/w of polymerizing substance.
- the yarn comprises at least 20% w/w of polymerizing substance.
- the yarn comprises at most 70% w/w of polymerizing substance.
- the yarn comprises at most 50% w/w of polymerizing substance.
- the yarn comprises at most 30% w/w of polymerizing substance.
- said polymerizing substance is preferably comprised between 5% and 50% by weight on the weight of the yarn and more preferably comprised between 410% and 40%, and even more preferably comprised between 15% and 35% by weight on the weight of the yarn.
- the textile yarn also comprises triglyceride, preferably of the capryl/capric type, preferably relating to fatty acids derived from coconut and palm oil.
- the yarn comprises at least 0.2% w/w of triglyceride.
- the yarn comprises at least 0.7% w/w of triglyceride.
- the yarn comprises at least 1.2% w/w of triglyceride.
- the yarn comprises at most 26% w/w of triglyceride.
- the yarn comprises at most 17% w/w of triglyceride.
- the yarn comprises at most 12% w/w of triglyceride.
- the triglyceride is comprised between 0.5% and 25% by weight on the weight of the yarn and more preferably comprised between 1% and 15%, and even more preferably comprised between 1.5% and 13% by weight on the weight of the yarn.
- the yarn comprises a bactericidal or preservative substance, preferably in an amount comprised between 0.1% and 10% by weight on the weight of the yarn; such as 2,4dimethylbenzoic acid.
- a bactericidal/preservative substance can be combined with acacia gum before the yarn production step. Therefore, the amount of acacia gum in the composition of the textile yarn can be calculated both as pure acacia gum and as an amount of a raw material, for example in solid form (for example in powder) consisting of the union of the acacia gum combined with one or more preservative or bactericidal substances (or still another type of substance) before the yarn production step.
- the textile yarn has a metric count (or metric number) comprised between 2000 Nm and 50000 Nm and more preferably comprised between 3000 Nm and 30000 Nm, and even more preferably comprised between 5000 Nm and 22000 Nm, or between 4500 and 35000 Nm.
- the textile yarn is made by extrusion, preferably hot, or the textile yarn is in the form of an extruded filament, preferably hot.
- an object of the invention is also a textile fibre produced starting from the yarn as described above.
- the invention also relates to a process for making a textile yarn which includes:
- the extrusion occurs in an extrusion chamber with two heating zones, in sequence: a first zone set at a temperature comprised between 96°C and 108°C and a second zone set at a temperature comprised between 52°C and 75°C.
- Graphs are attached to the present description relating to the characterization of a sample of yarn according to the invention.
- Graphs are attached to the present description relating to the characterization of a sample of yarn according to the invention.
- the yarn according to the invention comprises two fundamental materials, such as acacia gum and polyamide. Such two components allow to have a transparent or almost transparent yarn which has both the features of a natural fibre and the technical properties of a synthetic fibre.
- An example of yarn according to the invention is made by means of thermal extrusion, inside an extruder, of a base material.
- Such a base material includes the combination of powdered acacia gum (in such an example, acacia gum means acacia gum mixed with a preservative or bactericidal substance and subsequently such mixture is made powdered; alternatively, the acacia gum can be pure or mixed with other substances), preferably of the Kordofan type and powdered polyamide, which substantially acts as a hot-melt adhesive.
- acacia gum means acacia gum mixed with a preservative or bactericidal substance and subsequently such mixture is made powdered; alternatively, the acacia gum can be pure or mixed with other substances
- PEG polyethylene glycol
- capryl/capric triglyceride triglyceride of fatty acids derived from coconut and palm oil suitable for cosmetic use
- 99.5% urea bleached vinegar, polyphosphates (for example E450 80% and E339 20%), turpentine essence are added.
- the mixing process of the base material components is as follows.
- acacia gum-based material substantially comprises acacia gum and may contain a bactericidal or preservative substance, such as 2,4dimethylbenzoic acid.
- the polyphosphates are mainly used as emulsifiers, stabilizers, and acidity regulators. They are used to bind metal ions, prevent drying and the formation of lumps which can originate in the creation of the final product. They also facilitate the extrusion step by decreasing the viscosity generated by the acacia gum.
- the vinegar contains 80% water, amino acids, mineral salts. It is used as a catalyst, as it pushes the reaction between the polyamide and the acacia gum while maintaining an acid pH so that the acacia gum does not lose its viscosity.
- the turpentine essence is used to facilitate the extrusion process, to give brightness and increase the transparency effect of the yarn.
- 6.6 g of polyethylene glycol (PEG), 7 g of 99.5% urea and 0.6 g of capryl/capric triglyceride are mixed. Such a third mixture is heated to a melting temperature comprised between about 145°-150°C.
- PEG has a high mobility in solution, and being a polymerizing agent, it facilitates the bond between the polyamide and the acacia gum.
- the triglyceride gives a silky touch to the yarn and is also used as a solubilizing agent for less soluble active substances.
- the first two powder mixtures are added to the third mixture, which are also mixed, to form a homogeneous and viscous mass. Such a mass is transferred while still hot onto a die for forming pellets of base material to be extruded.
- the extrusion step includes the base-material pellet inside an extruder, for example of the screw type.
- the extruder has a pellet loading hopper, which feeds a heated extrusion chamber, inside which there is an extrusion screw which advances the pellet, melting it.
- the extrusion chamber has two heating zones, in sequence: a first zone set at a temperature comprised between 96°C and 108°C and a second zone set at a temperature comprised between 52°C and 75°C. At the end of the chamber, the molten material reaches the extrusion die, from which the yarn emerges.
- the analysis was carried out directly on the solid sample received using the ATR accessory.
- Such a technique performs a first chromatographic separation of the analytes by means of the UHPLC system. Subsequently the analytes are desorbed from the ESI (electron spray ionization) source and enter the QTOF system, where they are further separated by the first quadrupole based on their mass/charge ratio and finally by the time-of-flight analyser, which allows to obtain a high resolution of the molecular ions, allowing the identification of the raw formula. All the ions in both positive and negative modes are acquired with a mass charge ratio comprised between 50 and 1200 Da.
- ESI electron spray ionization
- Figure 1 shows the spectrum of the IR analysis and can be traced back to that of a polyamide polymer.
- the absorption bands of acacia gum are less intense with respect to polyamide.
- the yarn sample was also subjected to DSC analysis with the following thermal programme: - 1st heating from -60 °C to 155 °C, 20 °C/min in N2 - Cooling from 155 °C to - 60 °C, - 20 °C/min in N2 - 2nd heating from - 60 °C to 155 °C, 20 °C/min in N2. The result can be seen in figure 2 .
- the analysis was conducted up to 155°C because beyond that, the sample material degrades.
- the sample also shows an endothermic peak in the second heating at 33.9°C. such a very small transition is due to the gummy fraction of the sample (at the end of the analysis the DSC capsule was opened and gummy residue was observed).
- Figure 3 shows the positive chromatographic spectrum of the yarn extract in solvent relating to the characterization in HPLC/MS-MS. The analysis was conducted on the extract in ethanol after a 200-factor dilution. The compounds found are attributable to polyamide and PEG.
- Figure 4 shows the negative chromatographic spectrum of the yarn extract in solvent relating to the characterization in HPLC/MS-MS.
- the production steps are substantially the same as previously described.
- the starting materials are for example the following:
- the metric count of the yarn of this example is approximately 5000 Nm, while its composition is as follows:
- the yarn which is the object of this invention can be placed between natural vegetable yarns and synthetic yarns, as it has a natural vegetable component and a synthetic component.
- the yarn according to the invention is an absolute novelty with respect to the existing yarns because in order to give the fabric the desired effect, it must not be coloured so as to remain transparent and so as to create a fabric with a particular depth effect, or three-dimensionality.
- the invention finds application mainly in the textile field; in fact, it can be used in clothing by using it for making clothes, bags and umbrellas, and for making all clothing accessories; in the furnishing fabrics sector to make curtains, rugs and upholstery for furnishings, in the beauty sector to make wigs and extensions, and lastly in the vehicle interior upholstery sector. Furthermore, the material according to the invention can be used for packaging and objects.
Abstract
The subject matter of the invention is a textile yarn, comprising acacia gum comprised between 10% and 80% by weight on the weight of the yarn, and polyamide comprised between 75% and 5% by weight on the weight of the yarn.
Description
- The present invention relates to the field of textile materials.
- More in particular, the subject matter of the present invention is an innovative textile yarn which can be used for example for making clothes, making bags, umbrellas, clothing accessories, furnishing products such as curtains, rugs and upholstery for indoor and outdoor furnishings and further for making wigs and extensions, etc.
- As is known, yarns generally consist of textile fibres of natural or synthetic origin. The fibres are generally provided with a colour which is inadequate for textile use and therefore the yarns (or fabrics) deriving therefrom them must be dyed.
- The textile market is always seeking new yarns capable of creating particular fabrics and visual effects on the final fabric.
- In this sense, new fibres have been presented on the market such as, for example, Bermuda grass fibre and orange peel fibre. These have not found great use because they had scarce processing ductility and practicality to be used on a large scale.
- Furthermore, attempts have been made for fabrics or non-woven fabrics capable of having a mesh structure capable of giving volume to the fabric.
- Such attempts have had very specific and limited uses and, in general, have not been well appreciated by the market.
- The object of the present invention is to make a textile yarn which allows to obtain visual effects on the final textile products which allow a particular three-dimensionality of the products themselves.
- Another important object of the present invention is to make a textile yarn which does not require colouring.
- Another important object of the present invention is to make a textile yarn which can be easily processed with the known art.
- These and other objects, which will become clearer hereinafter, are achieved with a textile yarn, comprising at least 10% acacia gum by weight on the weight of the yarn (w/w), and at least 5% polyamide by weight on the weight of the yarn (w/w).
- Such a yarn has a natural and a synthetic component and is substantially colourless, i.e., it is at least partly transparent. Such a yarn also combines the features of a thermosetting material, such as acacia gum, and a thermoplastic material, such as polyamide (for example in the form of hot-melt adhesive material).
- Conveniently, in preferred embodiments, the textile yarn can be transparent or at least partially transparent, thanks to the adequate use of acacia gum.
- In preferred embodiments, the yarn comprises at least 15% w/w of acacia gum
- In preferred embodiments, the yarn comprises at least 20% w/w of acacia gum.
- In other embodiments, the yarn comprises at least 30% w/w of acacia gum.
- In still other embodiments, the yarn comprises at least 40% w/w of acacia gum.
- In some embodiments, the yarn comprises at most 70% w/w of acacia gum, or at most 60% w/w of acacia gum.
- In some embodiments, the acacia gum can be comprised between 12% and 70% by weight on the weight of the yarn and more preferably comprised between 15% and 60%, and even more preferably comprised between 18% and 55% by weight on the weight of the yarn.
- In preferred embodiments, the acacia gum is of the Kordofan type.
- In preferred embodiments, the yarn comprises at least 10% w/w of polyam ide.
- In other preferred embodiments, the yarn comprises at least 20% w/w of polyamide.
- In other preferred embodiments, the yarn comprises at least 40% w/w of polyamide.
- In some embodiments, the yarn comprises at most 70% w/w of polyamide.
- In some embodiments, the yarn comprises at most 50% w/w of polyamide.
- In some embodiments, the yarn comprises at most 30% w/w of polyamide.
- In some embodiments, the polyamide is comprised between 10% and 70% by weight on the weight of the yarn and more preferably comprised between 12% and 65%, and even more preferably comprised between 15% and 55% by weight on the weight of the yarn.
- Preferably, the polyamide comprises caprolactam and laurolactam, and more preferably caprolactam comprised between 50% and 70% and laurolactam comprised between 30% and 50%.
- According to preferred embodiments, the textile yarn also comprises a polymerizing substance, such as preferably polyethylene glycol (PEG).
- In preferred embodiments, the yarn comprises at least 5% w/w of polymerizing substance.
- In other preferred embodiments, the yarn comprises at least 10% w/w of polymerizing substance.
- In other preferred embodiments, the yarn comprises at least 20% w/w of polymerizing substance.
- In some embodiments, the yarn comprises at most 70% w/w of polymerizing substance.
- In some embodiments, the yarn comprises at most 50% w/w of polymerizing substance.
- In some embodiments, the yarn comprises at most 30% w/w of polymerizing substance.
- In some embodiments, said polymerizing substance is preferably comprised between 5% and 50% by weight on the weight of the yarn and more preferably comprised between 410% and 40%, and even more preferably comprised between 15% and 35% by weight on the weight of the yarn.
- In preferred forms, the textile yarn also comprises triglyceride, preferably of the capryl/capric type, preferably relating to fatty acids derived from coconut and palm oil.
- In preferred embodiments, the yarn comprises at least 0.2% w/w of triglyceride.
- In other preferred embodiments, the yarn comprises at least 0.7% w/w of triglyceride.
- In other preferred embodiments, the yarn comprises at least 1.2% w/w of triglyceride.
- In some embodiments, the yarn comprises at most 26% w/w of triglyceride.
- In some embodiments, the yarn comprises at most 17% w/w of triglyceride.
- In some embodiments, the yarn comprises at most 12% w/w of triglyceride.
- In some embodiments, the triglyceride is comprised between 0.5% and 25% by weight on the weight of the yarn and more preferably comprised between 1% and 15%, and even more preferably comprised between 1.5% and 13% by weight on the weight of the yarn.
- Still, preferably, the yarn comprises a bactericidal or preservative substance, preferably in an amount comprised between 0.1% and 10% by weight on the weight of the yarn; such as 2,4dimethylbenzoic acid. For example, such a bactericidal/preservative substance can be combined with acacia gum before the yarn production step. Therefore, the amount of acacia gum in the composition of the textile yarn can be calculated both as pure acacia gum and as an amount of a raw material, for example in solid form (for example in powder) consisting of the union of the acacia gum combined with one or more preservative or bactericidal substances (or still another type of substance) before the yarn production step.
- Suitably, in preferred embodiments, the textile yarn has a metric count (or metric number) comprised between 2000 Nm and 50000 Nm and more preferably comprised between 3000 Nm and 30000 Nm, and even more preferably comprised between 5000 Nm and 22000 Nm, or between 4500 and 35000 Nm.
- Suitably, in preferred embodiments, the textile yarn is made by extrusion, preferably hot, or the textile yarn is in the form of an extruded filament, preferably hot.
- According to another aspect, an object of the invention is also a textile fibre produced starting from the yarn as described above.
- According to another aspect, the invention also relates to a process for making a textile yarn which includes:
- making a first mixture of powdered polyamide, powdered acacia gum-based material, and emulsifying and/or stabilizing substance, preferably based on polyphosphates;
- making a second mixture of a catalyst substance, preferably vinegar, and a substance which facilitates the extrusion and polishing process, such as preferably turpentine or turpentine essence;
- making a third mixture of urea, triglyceride and polymerizing agent (preferably polyethylene glycol PEG);
- heating said third mixture to a melting temperature comprised between about 135°-160°C;
- adding the first and the second mixture to the third mixture when at melting temperature, to form a homogeneous and viscous mass;
- transferring the mixture obtained, at a temperature higher than room temperature, into a pellet-forming mould;
- letting the pellets cool;
- extruding, preferably hot, the pellets obtained in an extruder to make an extruded yarn.
- Preferably the extrusion occurs in an extrusion chamber with two heating zones, in sequence: a first zone set at a temperature comprised between 96°C and 108°C and a second zone set at a temperature comprised between 52°C and 75°C.
- Graphs are attached to the present description relating to the characterization of a sample of yarn according to the invention. In particular,
-
Figure 1 represents the IR spectrum obtained on a sample of yarn according to the invention; -
Figure 2 represents a thermogram relating to the Differential Scanning Calorimetry (DSC) analysis carried out on the yarn sample under analysis infigure 1 ; -
Figures 3 and4 represent the positive and negative chromatographic spectrum (with HPLC technique) of the yarn extract in solvent of the sample under analysis. - The yarn according to the invention comprises two fundamental materials, such as acacia gum and polyamide. Such two components allow to have a transparent or almost transparent yarn which has both the features of a natural fibre and the technical properties of a synthetic fibre.
- An example of yarn according to the invention is made by means of thermal extrusion, inside an extruder, of a base material.
- Such a base material includes the combination of powdered acacia gum (in such an example, acacia gum means acacia gum mixed with a preservative or bactericidal substance and subsequently such mixture is made powdered; alternatively, the acacia gum can be pure or mixed with other substances), preferably of the Kordofan type and powdered polyamide, which substantially acts as a hot-melt adhesive. In order to improve the combination and processing at the extruder, polyethylene glycol (PEG) and capryl/capric triglyceride (triglyceride of fatty acids derived from coconut and palm oil suitable for cosmetic use) are also added. To further improve the process, 99.5% urea, bleached vinegar, polyphosphates (for example E450 80% and
E339 20%), turpentine essence are added. - The mixing process of the base material components is as follows.
- In a recipient, 15.5 g of powdered hot-melt adhesive-type polyamide, 0.7 g of polyphosphates, and 7.5 g of powdered acacia gum-based material are mixed together. For example, such acacia gum-based material substantially comprises acacia gum and may contain a bactericidal or preservative substance, such as 2,4dimethylbenzoic acid.
- The polyphosphates are mainly used as emulsifiers, stabilizers, and acidity regulators. They are used to bind metal ions, prevent drying and the formation of lumps which can originate in the creation of the final product. They also facilitate the extrusion step by decreasing the viscosity generated by the acacia gum.
- In another recipient, 4.2 g of vinegar and 1.6 g of turpentine essence are mixed.
- The vinegar contains 80% water, amino acids, mineral salts. It is used as a catalyst, as it pushes the reaction between the polyamide and the acacia gum while maintaining an acid pH so that the acacia gum does not lose its viscosity.
- The turpentine essence is used to facilitate the extrusion process, to give brightness and increase the transparency effect of the yarn.
- In a further recipient, 6.6 g of polyethylene glycol (PEG), 7 g of 99.5% urea and 0.6 g of capryl/capric triglyceride are mixed. Such a third mixture is heated to a melting temperature comprised between about 145°-150°C.
- PEG has a high mobility in solution, and being a polymerizing agent, it facilitates the bond between the polyamide and the acacia gum.
- The triglyceride gives a silky touch to the yarn and is also used as a solubilizing agent for less soluble active substances.
- When the melting temperature is reached, the first two powder mixtures are added to the third mixture, which are also mixed, to form a homogeneous and viscous mass. Such a mass is transferred while still hot onto a die for forming pellets of base material to be extruded.
- The extrusion step includes the base-material pellet inside an extruder, for example of the screw type. In a known manner, the extruder has a pellet loading hopper, which feeds a heated extrusion chamber, inside which there is an extrusion screw which advances the pellet, melting it. The extrusion chamber has two heating zones, in sequence: a first zone set at a temperature comprised between 96°C and 108°C and a second zone set at a temperature comprised between 52°C and 75°C. At the end of the chamber, the molten material reaches the extrusion die, from which the yarn emerges.
- In order to verify the composition of the textile yarn, an examination is carried out on a 5-gram sample of yarn produced as indicated above.
- For the definition of the chemical structure of the polymer, the following were performed:
- DSC analysis (Differential Scanning Calorimetry)
- IR analysis (infrared spectroscopy)
- HPLC/MS-MS characterization
- The analysis was carried out directly on the solid sample received using the ATR accessory.
- An identification of the organic compounds present in the yarn was carried out using liquid chromatography with tandem mass spectrometry (HPLC/MS-MS). Such a technique includes an extraction of the yarn in solvent and subsequent injection of the extract in Shimadzu Nexera X2 UHPLC instrumentation coupled with a high resolution Sciex 4600 QTOF mass spectrometer.
- By means of the LC-Q-TOF analytical technique, it is possible to detect pollutants present in various kinds of matrices, at very low concentrations.
- Such a technique performs a first chromatographic separation of the analytes by means of the UHPLC system. Subsequently the analytes are desorbed from the ESI (electron spray ionization) source and enter the QTOF system, where they are further separated by the first quadrupole based on their mass/charge ratio and finally by the time-of-flight analyser, which allows to obtain a high resolution of the molecular ions, allowing the identification of the raw formula. All the ions in both positive and negative modes are acquired with a mass charge ratio comprised between 50 and 1200 Da.
-
Figure 1 shows the spectrum of the IR analysis and can be traced back to that of a polyamide polymer. The absorption bands of acacia gum are less intense with respect to polyamide. - The yarn sample was also subjected to DSC analysis with the following thermal programme: - 1st heating from -60 °C to 155 °C, 20 °C/min in N2 - Cooling from 155 °C to - 60 °C, - 20 °C/min in N2 - 2nd heating from - 60 °C to 155 °C, 20 °C/min in N2. The result can be seen in
figure 2 . The analysis was conducted up to 155°C because beyond that, the sample material degrades. The DSC analysis shows endothermic transitions for the sample (melting of crystalline zones), not visible in the second heating, at T= 74.1 °C, 100.7 °C and 137.5 °C (first heating curve,figure 2 ). The sample also shows an endothermic peak in the second heating at 33.9°C. such a very small transition is due to the gummy fraction of the sample (at the end of the analysis the DSC capsule was opened and gummy residue was observed). -
Figure 3 shows the positive chromatographic spectrum of the yarn extract in solvent relating to the characterization in HPLC/MS-MS. The analysis was conducted on the extract in ethanol after a 200-factor dilution. The compounds found are attributable to polyamide and PEG. -
Figure 4 shows the negative chromatographic spectrum of the yarn extract in solvent relating to the characterization in HPLC/MS-MS. - In essence, the yarn analysis led to the following composition:
- 51% polyamide
- 22.5% acacia gum
- 22% polyethylene glycol (PEG)
- 2% triglyceride
- 2.5% Bactericidal/preservative substance (2,4dimethylbenzoic acid)
- A further example of a textile yarn according to the invention is shown below.
- The production steps are substantially the same as previously described. The starting materials are for example the following:
- Acacia gum 14.5 g
- Polyamide 7g
- PEG 8.1 g
- Triglyceride 0.6 g
- Polyphosphates 0.7 g
- Vinegar 4.2 g
- Turpentine 1.6 g
- 99.5% urea 7g
- After the extrusion, the metric count of the yarn of this example is approximately 5000 Nm, while its composition is as follows:
- 20% polyamide
- 50% acacia gum
- 23.5% polyethylene glycol (PEG)
- 2.5% triglyceride
- 4% Bactericidal/preservative substance (2,4dimethylbenzoic acid).
- With such yarns it is possible to make fabrics, or non-woven fabrics, having a particular softness and silkiness.
- The yarn which is the object of this invention can be placed between natural vegetable yarns and synthetic yarns, as it has a natural vegetable component and a synthetic component.
- Such a yarn also arises from the need to renew the variety of yarns existing on the market. The yarn according to the invention is an absolute novelty with respect to the existing yarns because in order to give the fabric the desired effect, it must not be coloured so as to remain transparent and so as to create a fabric with a particular depth effect, or three-dimensionality.
- The invention finds application mainly in the textile field; in fact, it can be used in clothing by using it for making clothes, bags and umbrellas, and for making all clothing accessories; in the furnishing fabrics sector to make curtains, rugs and upholstery for furnishings, in the beauty sector to make wigs and extensions, and lastly in the vehicle interior upholstery sector. Furthermore, the material according to the invention can be used for packaging and objects.
- It is understood that what has been illustrated represents only possible non-limiting embodiments of the invention, which can vary in forms and arrangements without departing from the scope of the concept underlying the invention. The possible presence of reference numbers in the attached claims has the sole purpose of facilitating the reading thereof in the light of the foregoing description and the accompanying drawings and does not in any way limit the scope of protection.
Claims (9)
- Textile yarn, comprising acacia gum between 10% and 80% by weight on the weight (w / w) of the yarn, and polyamide between 75% and 5% (w/w).
- Textile yarn according to claim 1, wherein the yarn comprises at least 20% w / w of acacia gum, or at least 30% w / w of acacia gum, or at least 40% w / w of acacia gum.
- Textile yarn according to one or more of the preceding claims, wherein the yarn comprises at least 10% w / w polyamide, or at least 20% w / w polyamide, or at least 40% w / w polyamide.
- Textile yarn according to one or more of the preceding claims, further comprising a polymerizing substance, preferably polyethylene glycol, preferably in an amount of at least 5% w / w.
- Textile yarn according to one or more of the preceding claims, further comprising triglyceride, preferably of the capril / capric type, preferably relating to fatty acids derived from coconut and palm oil, preferably in amounts at least equal to 0.2% w / w.
- Textile yarn according to one or more of the preceding claims, further comprising bactericidal or preservative substance, preferably in an amount comprised between 0.1% and 10% by weight on the weight of the yarn, preferably said substance being 2,4dimethylbenzoic acid; preferably said substance being combined with acacia gum before the yarn production step.
- Textile yarn according to one or more of the preceding claims, wherein said polyamide comprises caprolactam and laurolactam, and more preferably caprolactam comprised between 50% and 70% of polyamide and laurolactam comprised between 30% and 50% of polyamide.
- Textile yarn according to one or more of the preceding claims, characterized in that it is transparent or at least partially transparent.
- Textile yarn according to one or more of the preceding claims, having a metric count between 2000 Nm and 50000 Nm and more preferably between 3000 Nm and 30000 Nm, and even more preferably between 5000 Nm and 22000 Nm.
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB830867A (en) * | 1957-03-18 | 1960-03-23 | Bayer Ag | A process for the production of transparent synthetic linear polyamide filaments |
US20080090945A1 (en) * | 2006-09-19 | 2008-04-17 | Invista North America S.A R.L. | Polyamide composition with improved heat stability and whiteness |
US20100021679A1 (en) * | 2005-06-10 | 2010-01-28 | Gilles Robert | Polyamide yarns, filaments and fibers having enhanced properties |
-
2023
- 2023-08-16 EP EP23191623.0A patent/EP4324964A1/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB830867A (en) * | 1957-03-18 | 1960-03-23 | Bayer Ag | A process for the production of transparent synthetic linear polyamide filaments |
US20100021679A1 (en) * | 2005-06-10 | 2010-01-28 | Gilles Robert | Polyamide yarns, filaments and fibers having enhanced properties |
US20080090945A1 (en) * | 2006-09-19 | 2008-04-17 | Invista North America S.A R.L. | Polyamide composition with improved heat stability and whiteness |
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