Spin finish composition and fiber containing the same

Abstract

There is provided a spin finish composition, a fiber containing the same and yarn containing the fiber.

Description

[0001] SPIN FINISH COMPOSITION AND FIBER CONTAINING THE SAME

[0002] TECHNICAL FIELD

[0003] The present disclosure generally relates to a spin finish composition, a fiber containing the same and use of the fiber containing the spin finish composition in production of yarn.

[0004] BACKGROUND

[0005] This section illustrates useful background information without admission of any technique described herein representative of the state of the art.

[0006] Fibers, such as man-made cellulosic fibers viscose and lyocell staple fibers require a spin finish treatment to facilitate further processing of these fibers in the subsequent textile and nonwoven machinery. The purpose of spin finish treatment is to reduce friction to minimize fiber breakages caused by mechanical stresses during the processing as well as to prevent pile up of static electricity. Further requirements include good spreading on the fiber surface, thermal stability, no yellowing, anti-corrosivity, non-toxic nature and degradation at end-of-life. Typical spin finish composition is applied in quantities of approximately 0.5 wt% to 2 wt% per the amount of the fiber. The type of spin finish is tailored based on the fiber properties as well as based on the specific process that the fiber encounters.

[0007] Typically, a spin finish formulation comprises several components, such as surfactants, antistatic agents, emulsifiers, lubricants and functional additives.

[0008] There is a need for a single component spin finish composition that fulfills the requirements for a spin finish composition without need to formulate with additional components.

[0009] SUMMARY

[0010] The following presents a simplified summary of the features disclosed herein to provide a basic understanding of some exemplary aspects of the invention. This summary is not an extensive overview of the invention. It is not intended to identify key / critical elements of the invention or to delineate the scope of the invention. Its sole purpose is to present some concepts disclosed herein in a simplified form as a prelude to a more detailed description.

[0011] In a first aspect the present invention provides a spin finish composition comprising(a) compound having formula I, compound having formula II or a mixture of compounds I and II,

[0012] (b) compound having formula III, compound having formula IV or a mixture of compounds having formula III and IV or

[0013] (c) a mixture of at least one compound selected from the spin finish composition (a) and at least one compound selected from the spin finish composition (b),

[0014] wherein the compounds I, II, III and IV are

[0015]

[0016] wherein X' is halogenide anion or sulfonate anion, and R and R1are same or different, wherein R and R1are selected from alkyl group, alkenyl group, alkynyl group, alicyclic group, aralkyl group of branched or straight-chain structure containing from 10 to 30 carbon atoms, preferably from 12 to 24 carbon atoms, more preferably from 14 to 20 carbon atoms, even more preferably from 16 to 18 carbon atoms.

[0017] In a second aspect the present invention provides a method for spin finish treatment of fiber or yarn, the method comprising

[0018] providing fiber or yarn;

[0019] providing the spin finish composition according to the present invention; andtreating the fiber or the yarn with the spin finish composition.

[0020] In a third aspect the present invention provides fiber or yarn, wherein the fiber or the yarn comprises the spin finish composition according to the present invention or is produced with the method according to the present invention.

[0021] In a fourth aspect the present invention provides a method for producing yarn, the method comprises spinning the fiber according to the present invention into yarn and optionally multiplying the yarn.

[0022] In a fifth aspect the present invention provides a yarn, multiple wound yarn, plied yarn or cabled yarn comprising the yarn produced with the method according to the present invention.

[0023] In a sixth aspect the present invention provides a textile or a nonwoven article comprising yarn, multiple wound yarn, plied yarn or cabled yarn according to the present invention.

[0024] The present invention provides a single component spin finish composition for fiber(s) that can be used in amounts significantly less than 1 wt.%.

[0025] It was surprisingly found that the spin finish composition fulfills the requirements for a spin finish composition without the need to formulate with additional components, such as surfactants, alcohols, antistatic agents, emulsifiers, lubricants and / or functional additives.

[0026] It was additionally found that successful friction reduction for fiber (such as viscose fiber) was obtained at quantities of 1000 ppm and 2000 ppm of the spin finish composition of the present invention. It was also found that the pick-up of the spin finish composition for the fiber surface was good.

[0027] The spin finish composition of the present invention can also be applied as a component in a spin finish formulation together with, for example, surfactants, antistatic agents, emulsifiers, lubricants and functional additives. Due to its chemical structure, the spin finish composition of the present invention has both surfactant and lubricating performance properties, thus offering a potential to reduce the complexity of current spin finish formulations.

[0028] Additional benefits of the spin finish composition of the present invention comprises anticorrosive performance that is relevant when processing the fibers in contact with steelequipment, and high solubility to water that is a benefit in terms of even levelling of the substrate to the fiber surface. Furthermore, most of, preferably all, the chemistry is transferred from the aqueous phase to the fiber surface, that is a benefit in terms of water purification and material efficiency.

[0029] The appended claims define the scope of protection.

[0030] BRIEF DESCRIPTION OF THE FIGURES

[0031] Figure 1 shows the coefficient of friction of viscose fiber treated with the different spin finish compositions.

[0032] Figure 2 shows additional coefficient of friction results of viscose fiber treated with the different spin finish compositions.

[0033] Figure 3 shows the mean force of viscose fiber treated with the different spin finish compositions.

[0034] Figure 4 shows yarn spinning devices utilized in the spinning experiment.

[0035] Figure 5 shows Intermediate products after the unit operations in yarn spinning experiment.

[0036] Figure 6 shows the results of the fiber fineness experiment.

[0037] DETAILED DESCRIPTION

[0038] In a first aspect the present invention provides a spin finish composition comprising (a) compound having formula I, compound having formula II or a mixture of compounds I and II,

[0039] (b) compound having formula III, compound having formula IV or a mixture of compounds III and IV or

[0040] (c) a mixture of at least one compound selected from the spin finish composition (a) and at least one compound selected from the spin finish composition (b),

[0041] wherein the compound having formula I, II, III and IV are

[0042]

[0043] wherein X' is halogenide anion, such as Cl , Br or I , or sulfonate anion, and R and R1are same or different, wherein R and R1are selected from alkyl group, alkenyl group, alkynyl group, alicyclic group, aralkyl group of branched or straight-chain structure containing from 10 to 30 carbon atoms, preferably from 12 to 24 carbon atoms, more preferably from 14 to 20 carbon atoms, even more preferably from 16 to 18 carbon atoms.

[0044] In a preferred embodiment R and R1are same or different, and R and R1are selected from alkyl group, alkenyl group, alkynyl, aralkyl group of straight-chain structure containing from 10 to 30 carbon atoms, preferably from 12 to 24 carbon atoms, more preferably from 14 to 20 carbon atoms, even more preferably from 16 to 18 carbon atoms.

[0045] In another preferred embodiment R and R1are same or different, and R and R1are selected from alkyl group, alkenyl group of straight-chain structure containing from 10 to 30 carbon atoms, preferably from 12 to 24 carbon atoms, more preferably from 14 to 20 carbon atoms, even more preferably from 16 to 18 carbon atoms.

[0046] Yet in another preferred embodiment R and R1are same or different, and R and R1are selected from alkyl group of normal structure containing from 10 to 30 carbon atoms, preferably from 12 to 24 carbon atoms, more preferably from 14 to 20 carbon atoms, even more preferably from 16 to 18 carbon atoms.If the R and / or R1being the alkyl group of normal structure containing 10 or less than 10 carbon atoms, the friction reduction potential of the composition is low.

[0047] R and / or R1being the alkyl group of normal structure containing 20 or more carbon atoms may significantly reduce the solubility to the compounds having formula I, II, III and IV, but improve friction reduction properties.

[0048] R and / or R1being the alkyl group of normal structure containing 12 - 24 carbon atoms and R and / or R1being the alkyl group of normal structure containing 16-18 carbon atoms provides a composition that provides good friction reduction and attach well on fiber. R and / or R1being the alkyl group of normal structure containing 16-18 carbon atoms provides a composition that foams not too much.

[0049] The compounds having formula I, II, III and IV may be produced, for example, by the method disclosed in document WO2024 / 155904A1.

[0050] As an example, the compound having formula I may be produced by reacting 2-(dimethylamino)ethyl 3-methoxypropanoate with 1 mol of octadecyl 2-chloroacetate.

[0051] As another example the compound having formula II may be produced by reacting 2-(dimethylamino)ethyl 3-(2-(dimethylamino)ethoxy)propanoate with 2 mols of octadecyl 2-chloroacetate.

[0052] In one embodiment the spin finish composition comprises mixture of compounds I and II.

[0053] In one embodiment the spin finish composition (a), (b) and (c) is substantially free of any additional added components, preferably free of additional added components.

[0054] By term “substantially free” is meant amount of at most 100 ppm, preferably at most 50 ppm.

[0055] By term “additional added components” is meant components that usually are or are added in spin finish compositions, such as surfactants, alcohols, antistatic agents, emulsifiers, lubricants, functional additives, solvents, carriers, oils, waxes or a mixture thereof. To said term is not included impurities originating from the compounds having formula I, II, III, and IV or from starting materials that are used in production of the compounds having formula I, II, III and IV.In one embodiment the spin finish compositions (a), (b) and (c) may have impurities at most 1000 ppm, preferably at most 100 ppm.

[0056] In one embodiment the spin finish composition (a), (b) and (c) additionally comprises surfactant, alcohol, antistatic agent, emulsifier, lubricant, functional additive, solvent, carrier, oil, wax or a mixture thereof.

[0057] In one embodiment the surfactant comprises polysorbate or ethoxylated alcohol, such as isopropanol or hexanol, or a mixture thereof.

[0058] In one embodiment the alcohol comprises linear alcohols, such as linear C16-C22 alcohols, preferably, linear C16, C18, C20, C22 alcohol, more preferably linear C16, C18, C20 alcohols, blend of linear C16 and C18 alcohols or blend of linear C18, C20 and C22 alcohols.

[0059] In one embodiment the antistatic agent comprises quaternary ammonium compound, such as small molecular weight quaternary ammonium compound.

[0060] In one embodiment the emulsifier comprises algin, carrageenan, agar or a mixture thereof.

[0061] In one embodiment the lubricant comprises grease, oil or a mixture thereof.

[0062] In one embodiment the functional additive comprises colorant, hydrophobizing agent or a mixture thereof.

[0063] In one embodiment the solvent comprises white spirit. In one embodiment the solvent is white spirit.

[0064] In one embodiment the carrier comprises water. In one embodiment the carrier is water.

[0065] In one embodiment the oil comprises vegetable oil, mineral oil or a mixture thereof.

[0066] In one embodiment the wax comprises paraffin wax, bees wax or a mixture thereof.

[0067] In one embodiment the spin finish composition is solution, preferably an aqueous solution.

[0068] In one embodiment the spin finish composition is solution, preferably aqueous solution when the spin finish composition is substantially free of additional added components, preferably free of additional added components.In one embodiment the spin finish composition is colloid or emulsion, preferably an aqueous colloid or an aqueous emulsion.

[0069] In one embodiment the spin finish composition is colloid or emulsion, preferably an aqueous colloid or an aqueous emulsion when the spin finish composition comprises additional added components.

[0070] In a second aspect the present invention provides a method for spin finish treatment of fiber or yarn, the method comprising

[0071] providing fiber or yarn;

[0072] providing the spin finish composition according to the present invention; and

[0073] treating the fiber or the yarn with the spin finish composition according to the present invention.

[0074] The fiber or yarn can be treated with the spin finish composition by any known method in the art. Examples of such methods are applying the spin finish composition on the fiber or yarn; spraying the spin finish composition on the fiber or the yarn; dipping the fiber or yarn into the spin finish composition; or immersing the fiber or yarn into the spin finish composition.

[0075] In one embodiment the fiber is in the form of filament, staple fibers, sliver or yarn, preferably staple fibers.

[0076] In one embodiment the fiber comprises cellulosic fiber such as virgin and recycled manmade cellulosic fiber, natural fibers, cellulose, synthetic fiber such as polyester, polyamide and polyolefin, synthetic fiber blends or a blend thereof, preferably virgin or recycled manmade cellulosic fiber.

[0077] In one embodiment the virgin or recycled man-made cellulosic fiber comprises viscose, lyocell, cellulose carbamate, cellulose acetate or a blend thereof, preferably viscose, lyocell or a blend thereof.

[0078] In one embodiment the yarn is produced from fiber comprising cellulosic fiber such as virgin and recycled man-made cellulosic fiber, natural fibers, cellulose, synthetic fiber such as polyester, polyamide and polyolefin, synthetic fiber blends or a blend thereof, preferably virgin or recycled man-made cellulosic fiber.The yarn may be untreated yarn, i.e. , the yarn is not treated with a spin finish composition, or the yarn may be treated with a different spin finish composition than the spin finish composition according to the present invention

[0079] In one embodiment the fiber or yarn is treated with the spin finish composition (a), (b) or (c) in an amount of 100-20000 ppm, preferably 500-2500 ppm, more preferably 1000-2000 ppm per amount of the fiber.

[0080] In one embodiment amount of the compound having formula II is 5-95 wt.%, preferably 30-70 wt.%, most preferably 50 wt.% and amount of the compound having formula I is 5-95 wt.%, preferably 30-70 wt.%, most preferably 50 wt.%, based on the total amount of the spin finish compositions (a).

[0081] In one embodiment amount of the compound having formula IV is 5-95 wt.%, preferably 30-70 wt.%, most preferably 50 wt.% and amount of the compound having formula III is 5-95 wt.%, preferably 30-70 wt.%, most preferably 50 wt.%, based on the total amount of the spin finish compositions (b).

[0082] In one embodiment amount of the compound having formula II and IV is 5-95 wt.%, preferably 30-70 wt.%, most preferably 50 wt.% and amount of the compound having formula I and III is 5-95 wt.%, preferably 30-70 wt.%, most preferably 50 wt.%, based on the total amount of the spin finish composition (c).

[0083] In a third aspect the present invention provides fiber or yarn, wherein the fiber or the yarn comprises the spin finish composition according to the present invention or the fiber or the yarn is treated with the method according to the present invention.

[0084] In a fourth aspect the present invention provides a method for producing yarn, the method comprising spinning the fiber according to the present invention into yarn and optionally multiplying the yarn.

[0085] In one embodiment the method comprises steps

[0086] providing fibers; opening the fibers; optionally blending the opened fibers with other fibers; carding the fiber or the fiber blend; drawing the carded fiber or the carded fiber blend; roving the drawn fiber or drawn fiber blend; and spinning the roved fiber or roved fiber blend into yarn; and optionally multiplying the yarn.Said method steps are known in the art. Opening the fibers disintegrates fiber bundles to separate fibers. Carding disentangles and intermixes fibres and aligns the fibers. Drawing further refines and aligns the fibres after carding. Roving slightly twists the drawn sliver to create a strand called a roving. Spinning prepares the yarn. Examples of different yarn spinning methods are ring spinning, open-end spinning and air-jet spinning. Multiplying yarn twists two or more yarns together to provide stronger and more durable yarn.

[0087] Figure 3 shows the yarn spinning devices (fiber opening 10, carding 20, making pre-yarn 30 and ring spinning 40) utilized in the spinning experiment of the examples.

[0088] In a fifth aspect the present invention provides a yarn, multiple wound yarn, plied yarn or cabled yarn comprising the yarn produced with the method according to the present invention.

[0089] Said different yarn structures are known in the art. Multiple wound yarn is composed from at least two yarns without twist. Plied yarn is a yarn formed by twisting together two or more single yarns in one operation. Cabled yarn is a yarn formed by twisting together two or more plied yarn.

[0090] In a sixth aspect the present invention provides a textile or a nonwoven article comprising the yarn, multiple wound yarn, plied yarn or cabled yarn according to the present invention.

[0091] EXAMPLES

[0092] Materials

[0093] Fiber

[0094] Commercial viscose staple fibers having fineness 1.3 and length 40 mm.

[0095] Spin finish compositions

[0096] - Sample code “CV No SF”: Cellulose viscose fibre (CV) with no added spin finish composition.

[0097] - Sample code “CV Comm SF”: commercial spin finish composition.

[0098] - Sample code “CV C18 mixed betainate 1000 ppm”: mixture of compounds having formula I and II, wherein R is n-octadecyl group and R1is n-octadecyl group.- Sample code “CV oleyl mixed betainate 1000 ppm”: mixture of compounds having formula I and II, wherein R is (9Z)-octadec-9-en-1-yl (oleyl) group and R1 is (9Z)- octadec-9-en-1-yl (oleyl) group.

[0099] - Sample code “CV C18 mixed betainate 2000 ppm”: mixture of compounds having formula I and II, wherein R is n-octadecyl group and R1is n-octadecyl group.

[0100] - Sample code “CV#1 1000 ppm” mixture of compounds having formula I and II, wherein R is n-hexadecyl group or n-octadecyl group and R1is n-hexadecyl group or n-octadecyl group.

[0101] - Sample code “CV #2 1000 ppm”: mixture of compounds having formula I and II, wherein R is n-octadecyl group or n-eicosanyl group or n-docosanyl group and R1is n-octadecyl group or n-eicosanyl group or n-docosanyl group.

[0102]

[0103] The compounds having formula I and II may be produced by the method disclosed in document WO2024 / 155904A1.

[0104] Example of preparation of the compound having formula I

[0105] The reaction flask was charged with 2-(dimethylamino)ethyl 3-methoxypropanoate and octadecyl 2-chloroacetate with about same mol amounts. The reaction mixture was stirred at 50 °C for one hour, and this temperature was maintained for 20 hours, without stirring. The reaction likely proceeded according to the following scheme (R is n-octadecyl group)

[0106]

[0107] Example of preparation of the compound having formula IIThe reaction flask was charged with (2-(dimethylamino)ethyl 3-(2-(dimethylamino)ethoxy)propionate and n-octadecyl 2-chloroacetate with molar ratio of about 1 :2. The reaction mixture was stirred at 50 °C for one hour, and this temperature was maintained for 20 hours, without stirring. The reaction likely proceeded according to the following scheme (R is n-octadecyl group and R1is n-octadecyl group)

[0108]

[0109] Example of preparation of the mixed betainate comprising mixture of the compounds having formula I and formula II (R is n-octadecyl group and R1is n-octadecyl group)

[0110] The reaction flask was charged with mixture (2-(dimethylamino)ethyl 3-(2-(dimethylamino)ethoxy)propionate (2-(dimethylamino)ethyl 3-methoxypropionate in any suitable or available molar ratio as disclosed in document WO2024 / 155904A1 and n-octadecyl 2-chloroacetate with molar ratio of about 1 mol of dimethylamino group : 1 mol of chloroacetyl group. The reaction mixture was stirred at 50 °C for one hour, and this temperature was maintained for 20 hours, without stirring.

[0111] The sample of CV C18 mixed betainate surfactant used as testing material was prepared from a mixture containing about 70mol.% of (2-(dimethylamino)ethyl 3-methoxypropionate and 25mol.% of (2-(dimethylamino)ethyl 3-(2-(dimethylamino)ethoxy)propionate.

[0112] Spin finish treatment

[0113] General procedure

[0114] The application of the spin finish composition to the viscose staple fiber surface was made by preparing an aqueous solution of the given spin finish compositions (Table 1) and immersing the viscose staple fibers into the solution for 60 min in room temperature (22-25°C).Table 1.

[0115]

[0116] *concentration of cationic compound in a solution

[0117] CV #1 is derived from a commercially available blend of linear alcohols containing dodecan-1 -ol max. 0.4 wt.%; tetradecan- 1-ol max. 4.0 wt.%; hexadecan-1 -ol 27.0 ± 4 wt.%; octadecan- 1 -ol 70.0 ± 5 wt.%; icosan-1-ol max 2.0 wt.%; docosan-1-ol max 0.2 wt.%.

[0118] CV #2 derived from a commercially available blend of linear alcohols containing hexadecan-1 -ol max. 0.5 wt.%; octadecan- 1 -ol 5±1 wt.%; icosan-1-ol 17.0 ± 2 wt.%; docosan-1-ol 76.0 ± 2 wt.%; tetracosan- 1-ol max 1.5 wt.%.Specific procedure 1

[0119] 48.3 mg of CV C18 mixed betainate was dissolved at room temperature in 500ml of 10 ppm HCI water solution. 20 g of viscose fiber without spin finish treatment was immersed in 200 g of prepared CV C18 mixed betainate solution at room temperature for 1 hour. The solution was squeezed until the sample weight was 50 grams. The sample was dried 30°C / 150-200mbar / 24h to obtain a starting mass of fiber 20g. Applied amount of CV C18 mixed betainate 0.96 g / 1 kg of fiber.

[0120] Specific procedure 2

[0121] 112.9 mg of CV C18 mixed betainate was dissolved at room temperature in 500ml of 10 ppm HCI water solution.20 g of viscose fiber without spin finish treatment was immersed in 200 g of CV C18 mixed betainate solution at room temperature for 1 hour. The solution was squeezed until the sample weight was 50 grams. The sample was dried 30°C / 150-200mbar / 24h to obtain a starting mass of fiber 20g. Applied amount of surfactant 2.6 g / 1 kg of fiber.

[0122] The amount of the spin finish composition on the fiber surface was confirmed by non-purgeable organic carbon (NPOC) analysis.

[0123] Friction performance

[0124] The friction measurements were conducted by Favimat fiber analyzer (TexTechno, Germany) friction clamp. Settings were as follows: load cell 210 cN, friction clamp, gauge length 2 mm, testing speed 20 mm / min, threshold 0.1% of 210 cN, pretension 0.2 g. The conditions were room humidity (RH) 54% and temperature 21.8 °C. Samples were preconditioned before the measurement.

[0125] Figure 1 shows the friction coefficients with standard deviations for the spin finish compositions. The results clearly show the effective friction reduction ability of sample CV C18 mixed betainate spin finish composition according to the present invention when applied on viscose at the tested amounts of 1000 ppm and 2000 ppm. The results are clearly improved when compared to the reference commercial spin finish treated viscose fibers (CV Comm SF). While the amount of the commercial spin finish composition is not known, it is common knowledge in the art that spin finish compositions are applied onto fibers in amounts significantly higher than 1000-2000 ppm, typically in the range of 0.5 % to 2 %. Also, the tested CV #1 and CV #2 were shown to be comparable in performance to CV C18 mixed betainate spin finish composition of the present invention and clearly improved fromthe commercial reference. Thus, it was shown that a significantly lower amount of CV C18 mixed spin finish composition of the present invention, or the CV #1 or CV #2 is needed to obtain the desired level of friction reduction. With 2000 ppm addition was seen to even further lower the friction coefficient, while the influence was minimal and 1000 ppm or even less is sufficient for reaching the reference level performance. The results further show that oleyl mixed surfactant (CV oleyl mixed 1000 ppm) delivered comparable friction performance to the commercial reference. Samples in the Figure 1 are Sample 1: CV no spin finish; Sample 2: CV commercial spin finish; Sample 3: CV C18 mixed betainate 1000 ppm; Sample 4: CV oleyl mixed betainate 1000 ppm; Sample 5: CV C18 mixed betainate 2000 ppm; Sample 6: CV #1 1000 ppm; Sample 7: CV #2 1000 ppm.

[0126] Figure 2 shows the coefficient of friction of viscose fiber having no spin finish (Sample 1), viscose fiber having 960 ppm of CV C18 mixed betainate (Sample 2: produced by specific procedure 1) and viscose fiber having 2260 ppm of CV C18 mixed betainate (Sample 3: produced by specific procedure 2).

[0127] Figure 3 presents the mean force with standard deviation for said spin finish composition. These results correlate with the coefficient of friction, and show the same conclusions as described for the results of coefficient of friction. Samples in the Figure2 are Sample 1 : CV no spin finish; Sample 2: CV commercial spin finish; Sample 3: CV C18 mixed betainate1000 ppm; Sample 4: CV oleyl mixed betainate 1000 ppm; Sample 5: CV C18 mixed betainate 2000 ppm; Sample 6: CV #1 1000 ppm; Sample 7: CV #2 1000 ppm.

[0128] Yarn

[0129]

[0130] Testing of the spin finish compositions in yarn spinning machinery and unit operations (opening, carding, pre-yarn manufacturing, ring spinning). Further, the yarn quality was evaluated.

[0131] Materials and methods

[0132] Amount of 100 g of four fiber samples were prepared for the yarn spinning experiment as follows:

[0133] Sample 1 (No SP): viscose staple fiber 1.3dTEX40mm without spin finish.

[0134] Sample 2 (Commercial SP): viscose staple fiber 1.3dTEX 40mm with commercial spin finish.Sample 3 (EXP 1000): viscose staple fiber 1.3dTEX 40mm without spin finish + CV C18 mixed betainate spin finish 1000 ppm

[0135] Sample 4 (EXP 2000): viscose staple fiber 1,3dTEX 40mm without spin finish + CV C18 mixed betainate spin finish 2000 ppm

[0136] The application of the CV C18 mixed betainate spin finish composition (Samples 3 and 4) to the viscose staple fiber surface was made by preparing an aqueous solution of the CV C18 mixed betainate spin finish composition and immersing the viscose staple fibers into the solution for 60 min in room temperature (22-25°C).

[0137] Figure 4 shows the used small pilot scale devices: fiber opening 10, carding 20, making pre-yarn 30 and ring spinning 40 utilized in the experiment.

[0138] Figure 5 shows the intermediate products (product after opening, after carding, 1 ply preyarn, 3 ply pre-yarn, 32 den yarn after ring spinning) obtained from each of the unit operation. Target fineness was set to 32 with all the 4 samples (by weighing 1 m of pre-yarn and dividing it with 32 to find a calculated stretch to the ring spinning).

[0139] Tex measurement: 90 meters of yarn was weighed. Tex = weight *10001 length.

[0140] The performance during the experiment was evaluated visually by the operators. Further, the yarn quality was evaluated in terms of tex / fiber fineness (Favigraph, TexTechno, Germany), and tensile strength (Testometric tensile tester M350-5CT).

[0141] Table 2 shows the visual notes during the experiment. Based on the results, it was noted that the yarn spinning was successful without disturbances.

[0142] Table 2. Visual notes during the yarns pinning unit operations.

[0143]

[0144]

[0145] Figure 6 shows the results of the fiber fineness experiment. Close to the set fiber fineness of 32 was reached with all tested fibers. No significant differences between the samples were detected. Thus, it can be concluded that the sample 3 and sample 4 spin finish composition did not cause challenges in the yarn structure of internal strength that would have been visible in alterations in the yarn fineness.

[0146] Table 3 presents the tensile properties of the yarns prepared in the spinning experiment. Ten (10) parallels were measured for sample 1 (no SP) and sample 2 (commercial SP) yarns while 15 parallels measured for sample 3 (1000 ppm) and sample 4 (2000 ppm) yarns. Variation between the results was detected, but the results remained stable with small variation.

[0147] Table 3. Tensile properties of the yarns.

[0148]

[0149]

[0150] Various embodiments have been presented. It should be appreciated that in this document, words comprise, include, and contain are each used as open-ended expressions with no intended exclusivity.

[0151] The foregoing description has provided by way of non-limiting examples of particular implementations and embodiments a full and informative description of the best mode presently contemplated by the inventors for carrying out the invention. It is however clear to a person skilled in the art that the invention is not restricted to details of the embodiments presented in the foregoing, but that it can be implemented in other embodiments using equivalent means or in different combinations of embodiments without deviating from the characteristics of the invention.

[0152] Furthermore, some of the features of the afore-disclosed example embodiments may be used to advantage without the corresponding use of other features. As such, the foregoing description shall be considered as merely illustrative of the principles of the present invention, and not in limitation thereof. Hence, the scope of the invention is only restricted by the appended patent claims.

Claims

CLAIMS1. A spin finish composition comprising(a) compound having formula I, compound having formula II ora mixture of compounds I and II,(b) compound having formula III, compound having formula IV or a mixture of compounds III and IV or(c) a mixture of at least one compound selected from the spin finish composition (a) and at least one compound selected from the spin finish composition (b),wherein the compounds I, II, III and IV are" " >wherein X-is halogenide anion or sulfonate anion, and R and R1are same or different, wherein R and R1are selected from alkyl group, alkenyl group, alkynyl group, alicyclic group, aralkyl group of branched or straight-chain structure containing from 10 to 30 carbon atoms, preferably alkyl group of straight-chain structure from 12 to 24 carbon atoms, more preferably alkyl group of straight-chain structure from 14 to 20 carbon atoms, even more preferably alkyl group of straight-chain structure from 16 to 18 carbon atoms.

2. The spin finish composition according to claim 1 , wherein the spin finish composition comprises mixture of compounds I and II.

3. The spin finish composition according to claim 1 or 2, wherein the spin finish composition (a), (b) and (c) is substantially free of additional added components, preferably free of additional added components.

4. The spin finish composition according to claim 1 or 2, wherein the spin finish composition (a), (b) and (c) additionally comprises surfactant, alcohol, antistatic agent, emulsifier, lubricant, functional additive, solvent, carrier, oil, wax or a mixture thereof.

5. A method for spin finish treatment of fiber or yarn, the method comprising providing fiber or yarn;providing the spin finish composition according to any one of clams 1-6; andtreating the fiber or the yarn with the spin finish composition.

6. The method according to claim 5, wherein the fiber is in the form of filament, staple fibers, sliver or yarn.

7. The method according to claim 5 or 6, wherein the fiber comprises cellulosic fiber such as virgin and recycled man-made cellulosic fiber, natural fibers, cellulose, synthetic fiber such as polyester, polyamide and polyolefin, synthetic fiber blends or a blend thereof.

8. The method according to any one of claims 5-7, wherein the amount of the spin finish composition (a), (b) or (c) is 100-20000 ppm, preferably 500-2500 ppm, more preferably 1000-2000 ppm per amount of the fiber.

9. The method according to any one of claims 5-8, wherein amount of the compound having formula II and IV is 5-95 wt.%, preferably 30-70 wt.%, most preferably 50 wt.% and amount of the compound having formula I and III is 5-95 wt.%, preferably 30-70 wt.%, most preferably 50 wt.%, based on the total amount of the mixtures of the spin finish compositions (a), (b) and (c).

10. Fiber or yarn, wherein the fiber or the yarn comprises the spin finish composition according to any one of claims 1-4 or is treated with the method according to any one of claims 5-9.

11. The fiber according to claim 10, wherein the fiber comprises cellulosic fiber such as virgin and recycled man-made cellulosic fiber, natural fibers, cellulose, synthetic fiber such as polyester, polyamide and polyolefin, synthetic fiber blends or a blend thereof.

12. A method for producing yarn, the method comprising spinning the fiber according to claim 10 or 11 into yarn and optionally multiplying the yarn.

13. The method according to claim 12, wherein the method comprises fiber opening; optionally blending fibers; carding; drawing; roving; and spinning into yarn; and optionally multiplying the yarn.

14. A yarn, multiple wound yarn, plied yarn or cabled yarn comprising the yarn produced with the method according to claim 12 or 13.

15. A textile or a nonwoven article comprising the yarn, multiple wound yarn, plied yarn or cabled yarn according to claim 14.

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