FABRIC ANTI-ODOUR AGENT, METHOD OF PRODUCTION AND USES THEREOF

Abstract

The present disclosure relates to the use of whey protein as an anti-odour agent in a fabric, a textile finishing anti-odour method using whey proteins as an anti-odour agent, anti-odour compositions and anti-odour articles.

Claims

1. A composition for functionalizing a fabric substrate somprising: a whey protein, a whey protein fraction or a denatured whey protein; as a deodorant agent or as deodorizer agent bound to the fabric substrate; provided that if the composition comprises whey protein or a whey protein fraction a suitable binder is present; wherein the whey protein is a whey protein isolate, a whey protein concentrate, or mixtures thereof.

2. (canceled)

3. The composition of claim 1, further comprising a suitable binder, an active substance, or mixtures thereof.

4. The composition of claim 1, wherein the binder is selected from the following list: polyurethane resin, glutaraldehyde, acrylic resin, glyoxal, carboxylic acid, or mixtures thereof, wherein said binder bound the whey protein to the fabric substrate.

5. The composition of claim 3, wherein the active substance is selected from a list consisting of: chitosan, vitamins, essential oils, fragrances, functional additives, or mixtures thereof.

6. The composition of claim 3, wherein the weight ratio between active substance and the whey protein or the whey protein fraction ranges from 1:1-12:1.

7. The composition of claim 3, Composition according to any of the previous claims wherein the whey protein aor the whey protein fraction and the active substance form particle aggregates.

8. The composition of claim 7, wherein the size of each particle aggregate ranges from 100-400 nm.

9. The composition of claim 7, wherein the zeta potential value in each particle aggregate ranges from 10-50.

10. The composition of claim 1, further comprising a dye, a thickener, a softener, an essential oil, or combinations thereof.

11. A functionalized fabric comprising the composition of claim 1.

12. The fabric of claim 11, the amount of whey protein or a whey protein fraction per cm.sup.2 of fabric ranges from 0.2-3 mg/cm.sup.2.

13. The fabric of claim 11, wherein said fabric is a woven fabric, a non-woven fabric, a yarn, a fibre, or a combination thereof.

14. The fabric of claim 13, wherein the fibre is selected from a list consisting of: cotton, polyester, polyamide, viscose, elastane, lyocell, or a mixture thereof.

15. An article comprising the composition of claim 1.

16. (canceled)

17. (canceled)

18. (canceled)

19. (canceled)

20. (canceled)

21. (canceled)

22. A method for producing a fabric comprising the composition claim 1, wherein the composition is applied on a fabric substrate by a step of: padding, exhaustion, spray coating, doctor blade, or screen printing.

23. The composition of claim 3, wherein the weight ratio between active substance and the whey protein or the whey protein fraction ranges from 2:1-10:1.

24. The fabric of claim 11, wherein the amount of whey protein or a whey protein fraction per cm.sup.2 of fabric ranges from 0.3-1.5 mg/cm.sup.2.

25. The fabric of claim 11, wherein the amount of whey protein or a whey protein fraction per cm.sup.2 of fabric ranges from 0.5-0.9 mg/cm.sup.2.

26. The composition of claim 7, wherein the zeta potential value in each particle aggregate ranges from 10-35.

27. The composition of claim 7, wherein the zeta potential value in each particle aggregate ranges from 10-20.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The following figures provide preferred embodiments for illustrating the disclosure and should not be seen as limiting the scope of invention.

[0035] FIG. 1: Schematic representation of textiles preparation comprising the composition of the present disclosure and the adapted procedure based on the standard ISO 17299-3 (2014).

[0036] FIG. 2: Schematic representation of assessment of IVA odour reduction rate capacity by textile substrates using the GC-FID technique.

[0037] FIG. 3: Schematic representation of evaluation of odoriferous atmosphere flasks through sensory evaluation panel/volunteers.

[0038] FIG. 4: Schematic representation of the structure of native and denatured protein.

[0039] FIG. 5: Schematic representation of the combination mechanism between whey protein and a bioactive agent.

[0040] FIG. 6: Schematic representation for the evaluation of zeta potential on WPC microparticles solutions.

[0041] FIG. 7: Schematic representation of odour reduction rate characterization for IVA after 1 washing cycle with a reference detergent.

[0042] FIG. 8: Schematic representation of the colorimetric method Acid Orange.

[0043] FIG. 9: Schematic representation of protein quantification by Acid Orange method after washing cycles with a reference detergent.

[0044] FIG. 10: Schematic representation of odour reduction rate characterization for IVA after 1 washing cycle with a reference detergent.

[0045] FIG. 11: Schematic representation of odour reduction rate characterization for IVA after 10 washing cycles with a reference detergent.

[0046] FIG. 12: Schematic representation of protein quantification by Acid Orange method after 10 washing cycles with two different reference detergents.

[0047] FIG. 13: Schematic representation of odour reduction rate characterization for IVA after 5 washing cycles with a reference detergent.

[0048] FIG. 14: Schematic representation of radical ABTS scavenging after 5 washing cycles with a reference detergent.

[0049] FIG. 15: Schematic representation of odour reduction rate characterization for IVA after 5 washing cycles with a reference detergent.

[0050] FIG. 16: Schematic representation of protein quantification by Acid Orange method after 15 washing cycles with a reference detergent.

[0051] FIG. 17: Schematic representation of odour reduction rate characterization for IVA after 5 washing cycles with a reference detergent.

[0052] FIG. 18: Schematic representation of protein quantification by Acid Orange method after 5 washing cycles with a reference detergent.

[0053] FIG. 19: Schematic representation of odour reduction rate characterization for IVA after 10 washing cycles with a reference detergent.

[0054] FIG. 20: Schematic representation of odour reduction rate characterization for IVA after 15 washing cycles with a reference detergent.

[0055] FIG. 21: Schematic representation of odour reduction rate characterization for IVA after usage simulation and one washing cycle.

[0056] FIG. 22: Schematic representation of protein quantification in yarns by Kjeldahl Method after 5 washing cycles with a reference detergent

[0057] FIG. 23: Schematic representation of odour reduction rate characterization for IVA.

DETAILED DESCRIPTION

[0058] The present disclosure relates to the use of whey protein as an anti-odour agent in a fabric, a textile finishing anti-odour method using whey proteins as an anti-odour agent, anti-odour compositions and anti-odour articles.

[0059] The present subject-matter discloses an all-green textile finishing anti-odour technology using whey proteins.

Anti-Odour Properties Evaluation

[0060] In an embodiment, the capacity to interact and/or neutralize odour is a property that is objectively determined by using ISO 17299:2014 standard method, using the gas chromatography with flame ionization detector (GC-FID) techniqueR. H. McQueen, M. Keelan, Y. Xu and T. Mah, Journal of the Textile Institute, 104:1 (2013), 108-117; and ISO 17299-1 (2014). Most odour-related studies include testing with a sensory evaluation panel, since the broadest and most sensitive odour detector is undoubtedly the mammalian olfactory system. This methodology combined with an instrumental method, becomes an ideal method for both internal and external odour analysis (M. A., Mcginley and C. M. Mcginley, AATCC Journal of Research, (2017), 1-17).

[0061] In an embodiment, FIG. 1 shows the adapted procedure of the odour reduction rate evaluation based on ISO 17299:2014 using GC-FID technique. The odour reduction rate (ORR) can be calculated using, the standard ISO 17299-3 (2014), TextilesDetermination of deodorant property: Gas chromatography method, Switzerland:

OOR=(SbSm)/Sb*100

where Sm is the average peak area of FID of the testing gas with a specimen; Sb is the average peak area of the testing was without specimen. According to the standard, and for IVA marker, a reduction capacity of 85% is required for a textile to be considered deodorant.

[0062] In an embodiment, two different substrates were analysed, textile A (67% PES+29% CV+4% EL) and textile B (63% CO+37% PES). The textile A was used as a positive control, as it already has intrinsically great interaction with the odour marker IVA, and textile B for having greater potential for improvement. In this sense, textile B was analyzed as control and functionalized with 7.5% of WPC by padding technique.

[0063] The reduction rate for IVA marker were analysed following ISO 17299-3:2014. In addition, a sensory analysis was performed with 19 volunteers for the same odoriferous marker, to qualify the odour felt and correlate with the results obtained by GC-FID technique.

[0064] In an embodiment, FIG. 2 shows that only the textile A can be considered as such (95% of reduction). Although, the functional textile B (78% of reduction) demonstrated a high ability to reduce IVA odour and improvement compared to the substrate control (45% of reduction achieved).

[0065] Since a greater ability to reduce an odour by a textile decreases the odour present in the atmosphere, it was possible corroborate the results of sensory analysis of the FIG. 3 with the results obtained by GC-FID of the FIG. 2. The volunteers were able to distinguish and considered that the less intense atmosphere is that of textile A, followed by the functional textile B and control textile B. Statistically (Table 1), by Friedman's test using the Newell and MacFarlane table (Table 2) for a 95% probability, it is further found that there are no significant differences between textile A and functional textile B.

TABLE-US-00001 TABLE 1 Statistical analysis of results obtained by sensory evaluation Samples 1 - Textile A 2 - Textile B 3 - Textile B control Sum 26 36 52 Difference 10 26 versus 1 Difference 16 versus 2

TABLE-US-00002 TABLE 2 Critical values for comparison with the modules of the differences between the orders sums of the ordination teste at 5 and 1% significance Number of Significance judgments Level (%) 3 4 5 6 7 . . . 19 5 15 21 27 33 40 . . . 1 18 25 32 39 46 . . .

Denaturation Process of Whey Proteins

[0066] In an embodiment, whey protein powders are highly soluble due to the low molecular weight and globular structure of the predominant proteins, i.e., -lactoglobulin and -lactalbumin. Whey proteins can be denatured by heat to alter their functional properties and its structural conformation (FIG. 4). A combination of time and temperature is used to control the amount of whey protein denaturation. Denatured protein interacts differently with water and other components than protein in its native state since the whey protein conformation and functionality are interrelated and dictated by changes in their globular folded structure.

Method A

[0067] In a laboratorial embodiment, the suspension of folded proteins was prepared by slowly dissolving WPC (whey protein concentrate) in water under magnetic stirring at room temperature until complete dissolution. The suspension of unfolded/denatured proteins was obtained from the folded protein suspension: first, pH was corrected by adding 8% (v/v) NaOH 0.1M relative to the total volume of the suspension, then the suspension was gradually heated in a thermostatic bath until it reached a final temperature of 85 C. and finally cooled down to room temperature.

Method B

[0068] In a laboratorial embodiment, the suspension of folded proteins was prepared by slowly dissolving WPC (whey protein concentrate) in water under magnetic stirring at room temperature until complete dissolution. The suspension of unfolded/denatured proteins was obtained from the folded protein suspension: first, pH was corrected by adding 8% (v/v) NaOH 0.1M relative to the total volume of the suspension, then the suspension was gradually heated in heating plate with 85 C. of final temperature set-point and finally cooled down to room temperature.

Method C

[0069] In an industrial embodiment, the suspension of folded proteins (10 wt %) was prepared by slowly dissolving WPC (whey protein concentrate) in water at room temperature until complete dissolution. The suspension of unfolded/denatured proteins was obtained from the folded protein suspension: first, pH was corrected by adding 8% (v/v) NaOH 0.1M relative to the total volume of the suspension. Then the suspension was gradually heated until 85 C. (coil heating feed by steam stream/steam flow) and finally cooled down to room temperature.

Microparticle Preparation Process

[0070] In an embodiment, protein microcapsules of WPC containing chitosan (an active agent to enhance antibacterial performance) were prepared. In this case, WPC stock solutions were prepared with 0.02% sodium azide, kept at 4 C. overnight. This procedure has the advantage of allowing complete hydration of the protein. A chitosan solution at 1% (m/v) (ChitoClear Primex) in 1% (v/v) acetic acid was also prepared. After adding 7.5% WPC and 0.75% chitosan, in a 1:10 ratio (v/v), vegetable oil was added in a concentration of 1% of total volume. Vegetable oil helps to maintain stability and emulsify. The mixtures were submitted to ultrasonication (US), at 20 kHz, with a wave amplitude equal to 57 m and a 22 mm diameter probe. The sonication time is 15 minutes, in an ice bath.

[0071] In as industrial embodiment, for tests at the industrial level, the microparticles were scaled up, adapting the procedure used at the laboratory level. In this case, batches of 7.5% WPC formulation, 0.75% chitosan and vegetable oil were prepared and submitted to ultrasonication, using a BS2d40 probe with 40 mm of diameter and a booster, generating an amplitude of 26 m (40/cm.sup.2), with a power of 5000W. The WPC, oil and chitosan solution, stored in a separate refrigerated reservoir (flow reactor), was recirculated to the reactor at a flow rate of 2 L/min, using a peristatic pump. A flow reactor was designed, specifically designed for ultrasonication, ensuring that temperature not exceed 25 C.

[0072] In an embodiment, the obtained nanoparticles were characterized the size (mean diameter, <DH>), and zeta (f) potential of the formulations were measured with a Malvern ZetaSizer Nano ZS, at 25 C. Disposable polystyrene cuvettes for size measurements and U-shaped zeta potential cuvettes were used. Both for DLS and zeta potential measurements a minimum of 5 repeats per sample were performed. In an embodiment, in terms of size, the microparticles have sizes between 200 and 350 nm, with a polydispersity index of less than 0.5. Regarding the zeta potential, at pH between 4 and 7, protein charge is negative. However, when chitosan is added, this charge reverses to positive, since the chitosan is positively charged. The zeta potential increases as the amount of chitosan also increases (FIG. 5). Since whey protein powder have a globular structure of the predominant proteins and has a negative charge and chitosan have a linear structure and has a positive charge, the aggregation mechanism may happen by electrostatic attraction, forming a complex aggregate between the protein and the polymer (FIG. 6). This mechanism is enhanced by the fact that chitosan is insoluble in water and will tend to be located inside the hydrophobic cavities of whey proteins, when in aqueous solution.

Formulation and Textile Functionalization

[0073] In an embodiment, a textile with 63% CO+37% PES composition was impregnated with whey protein concentrate at 7.5 wt % and glutaraldehyde (GA) 3 vol %, by pad-dry-cure technique. The textiles samples were dried at 100 C. for 2 minutes and cured at 120 C. for 2 minutes.

[0074] In an embodiment, FIG. 7 shows the GC-FID characterization for isovaleric acid (IVA) marker according ISO 17299-3:2014 adaptation after 1 washing cycle (WC), 1 h at 40 C., with a reference detergent in a domestic laundry machine. It is possible to observe that whey protein increases the interaction between the textile and IVA marker, demonstrating deodorant properties.

[0075] In an embodiment, a textile with 63% CO+37% PES composition was impregnated with whey protein concentrate denatured at 7.5 wt % by pad-dry-cure technique without binder. The textiles samples were dried at 100 C. for 2 minutes.

[0076] Protein quantification trough a colorimetric method Acid Orange was performed. The interaction between the dye Acid Orange and the functionalized surface allows determine the concentration of amine groups on surface of the textile. Then, and since proteins have amine groups in their composition, the lower the Abs value, the greater the amount of protein present in the textile (FIG. 8).

[0077] Protein quantification trough the colorimetric method Acid Orange was performed after 15 washing cycles (WC), with a reference detergent in a domestic laundry machine. The finishing on the textiles presents wash fastness up to 15 cycles, according FIG. 9.

[0078] In an embodiment, FIG. 10 shows the GC-FID characterization for isovaleric acid (IVA) marker according ISO 17299-3:2014 adaptation after 1 washing cycle (WC), 1 h at 40 C., with a reference detergent in a domestic laundry machine. It is possible to observe that whey protein increases the interaction between the textile and IVA marker, and since the finish has wash fastness up to 15 cycles (similar Abs throughout the washing cycles), it can be concluded that the finish maintains the same performance.

[0079] In an embodiment, a textile with 63% CO+37% PES composition was impregnated with whey protein (WPC) concentrate denatured at 7.5 wt % and glutaraldehyde (GA) 5 vol %, by pad-dry-cure technique. The GA was used as a crosslinker between the WPC and the textile substrate. The textiles samples were dried at 100 C. for 2 minutes and cured at 130 C. for 2 minutes.

[0080] FIG. 11 shows the GC-FID characterization for isovaleric acid (IVA) marker according ISO 17299-3:2014 adaptation after 10 washing cycles (WC), 1 h at 40 C., with a reference detergent in a domestic laundry machine. It is possible to observe that whey protein increases the interaction between the textile and IVA, increasing the odour reduction rate, demonstrating deodorant properties, and wash fastness up to 10 cycles.

[0081] Protein quantification trough the colorimetric method Acid Orange was performed after 10 washing cycles (WC), with two reference detergents in a domestic laundry machine. The finishing on the textiles presents wash fastness up to 10 cycles, according FIG. 12.

[0082] In a laboratorial embodiment, a textile with 63% CO+37% PES composition was impregnated with whey protein concentrate denatured at 9 wt % and a polyurethane resin (B1-binder) at 2 wt %, by pad-dry-cure technique. The textiles samples were dried at 100 C. for 2 minutes and cured at 160 C. for 2 minutes.

[0083] FIG. 13 shows the GC-FID characterization for isovaleric acid (IVA) marker according ISO 17299-3:2014 adaptation after 5 washing cycle (WC), 1 h at 40 C., with a reference detergent in a domestic laundry machine. Textile samples with WPC show high interaction for the IVA marker, with high odour reduction rate, demonstrating deodorant properties. Although the polyurethane resin binder interacts with IVA marker, whey protein significantly increases the interaction between the textile control and binder B1. The finishing on the textiles demonstrated deodorant properties and wash fastness up to 5 cycles.

[0084] The antioxidant activity was performed through the ABTS radical method. The ABTS assay is a colorimetric method based on the ABTS cation radical formation. This radical, which is dark green in colour, can react strongly with hydrogen donor compounds, such as phenolic compounds, being converted into a non-coloured form of ABTS. This method consists of spectrophotometric analysis of the oxidation activity of the cationic radical (ABTS.sup.+). This radical can be produced by the reaction in aqueous solution between ABTS (2,2-azinobis (3-ethylbenzothiazoline-6-sulfonic acid)) and potassium persulfate, resulting in a blue-green solution. The addition of substances with antioxidant power to ABTS.sup.+ (that is, hydrogen donor compounds, such as phenolics) causes a structural change that results in discoloration and loss of the ability to absorb in that wavelength.

[0085] FIG. 14 shows the percentage of inhibition of the ABTS.sup.+ radical for the textile control textile, functionalized with denatured protein and binder and functionalized only with binder. The results demonstrate that the sample with denatured protein show a high percentage of radical reduction, when compared to the control textile and binder, indicating an antioxidant activity.

[0086] In an embodiment, a textile with 63% CO+37% PES composition was impregnated by pad-dry-cure technique with whey protein concentrate denatured at 9 wt % and two polyurethane resins: B1 at 2 wt % and B2 at 4 wt %. The textiles samples were dried at 100 C. for 2 minutes and cured at 160 C. for 2 minutes.

[0087] GC-FID characterization for isovaleric acid (IVA) according ISO 17299-3:2014 adaptation was performed after 5 washing cycle (WC), 1 h at 40 C., with a reference detergent in a domestic laundry machine. It was possible to observe in FIG. 15 that, although the polyurethane binders interact with IVA marker, whey protein significantly increases the interaction between the textile control and booth binder B1 and B2. Textile samples with WPC show high interaction for the marker after 5 washing cycles, with high odour reduction rate compare the textile control, demonstrating deodorant properties.

[0088] Protein quantification trough the colorimetric method Acid Orange was performed after 15 washing cycles (WC) with a reference detergent (1 h at 40 C.) in a domestic laundry machine. The lower the Abs value, the greater the amount of amine groups in the substrate. Results present in FIG. 16 demonstrates the interaction between not only of whey protein, but also for the binders B1 and B2 with the Acid Orange marker. It is possible observe wash fastness of the finishing on the textile since, lower the Abs value, the greater the amount of protein and binder present in the textile. The increase observed with the washing cycles is not significant when compared to the value of the control textile. In addition, the results in FIG. 15 prove the presence of the protein in the textile substrate due to the high odour reduction rate obtained, being superior to the sample only with binder B1 and B2.

[0089] In an embodiment, a comparison of whey protein concentrate native and denatured at 9 wt % was made. The proteins were impregnated in a textile with 63% CO+37% PES composition by pad-dry-cure technique with a polyurethane resin (B1) at 2 wt %. The samples were dried at 100 C. for 2 minutes and cured at 160 C. for 2 minutes.

[0090] FIG. 17 shows GC-FID characterization for isovaleric acid (IVA) according ISO 17299-3:2014 adaptation after 5 washing cycle (WC) with a reference detergent (1 h at C.) in a domestic laundry machine. It was possible to observe that the odour reduction rate for the textiles finished with denatured whey protein is higher when compared with the native whey protein and the textile control and with the binder (B1).

[0091] Protein quantification trough a colorimetric method Acid Orange was performed after 5 washing cycles (WC) with a reference detergent (1 h at 40 C.) in a domestic laundry machine. The lower the Abs value, the greater the amount of amine groups in the substrate. Results present in FIG. 18 demonstrates the interaction between not only of whey protein, but also for the binder with the Acid Orange marker. It is possible observe wash fastness of the finishing on the textile since, lower the Abs value, the greater the amount of protein and binder present in the textile. However, the Abs value for the denatured whey protein samples is significantly lower when compared to the native whey protein samples and the increase observed with the washing cycles is not significant when compared to the value of the control textile. In addition, the results in FIG. 17 prove the presence of the protein in the textile substrate due to the high odour reduction rate obtained, being superior to the sample with native whey protein and only with binder B1.

[0092] In an embodiment, a textile with 63% CO+37% PES composition was impregnated by pad-dry-cure technique with microparticles prepared with chitosan and glutaraldehyde (GA) 5 vol % as a binder. The samples were dried at 100 C. for 2 minutes and cured at 130 C. for 2 minutes.

[0093] FIG. 19 shows GC-FID characterization for isovaleric acid (IVA) according ISO 17299-3:2014 adaptation after 10 washing cycle (WC) with a reference detergent (1 h at 40 C.) in a domestic laundry machine. The results demonstrate the wash fastness of the finishing on the textile samples up to 10 washing cycles and a higher odour reduction rate, demonstrating deodorant properties.

[0094] In order to evaluate the antimicrobial effect of the fabrics, they were subjected to the test according to the standard ISO 20743TextilesDetermination of antibacterial activity of antibacterial finished products after one washing cycle with a reference detergent, for the bacteria responsible for the degradation of sweat in compounds with unpleasant odours (S. Hominis and S. epidermidis) and two of the bacteria referred to in the standard (S. Aureus and P. innocua). The textiles show ability to inhibit growth of S. hominis, S. epidermidis and P. innocua, after 24 hours (Table 1).

TABLE-US-00003 TABLE 3 Determination of antibacterial activity of antibacterial (log UFC/ml growth between 0 H and 24 H) finished products after one washing cycle. Strain/ Textile Textile functionalized with Sample Control WPC microparticles S. aureus 5.39 6.33 S. epidermidis 4.31 6.39 S. hominis 2.74 0.4 P. Innocua 9.90 6.39

[0095] In an embodiment, a textile with 63% CO+37% PES composition was impregnated by pad-dry-cure technique with microparticles, prepared with chitosan, and a polyurethane resin (B1) at 2 wt %. The samples were dried at 100 C. for 2 minutes and cured at 130 C. for 2 minutes.

[0096] FIG. 20 shows GC-FID characterization for isovaleric acid (IVA) according ISO 17299-3:2014 adaptation after 15 washing cycle (WC). The results demonstrate the wash fastness of the finishing on the textile samples up to 15 washing cycles and a higher odour reduction rate, demonstrating deodorant properties.

[0097] FIG. 21 shows GC-FID characterization for isovaleric acid (IVA) according ISO 17299-3:2014 adaptation after the textiles were subjected to usage simulation test. Prior to the evaluation of the odour reduction rate, it was put in contact with the sweat odour molecule (IVA) and washed in a domestic laundry machine, with a reference detergent. The textiles regain the deodorant property after the washing.

[0098] In order to evaluate the maintenance of the antimicrobial effect of the fabrics, they were subjected to the test according to the standard ISO 20743TextilesDetermination of antibacterial activity of antibacterial finished products for the bacteria responsible for the degradation of sweat in compounds with unpleasant odours (S. Hominis and S. epidermidis) and two of the bacteria referred to in the standard (S. Aureus and P. innocua). The textiles show ability to inhibit growth of S. hominis, S. aureus and P. innocua, after 24 hours.

TABLE-US-00004 TABLE 4 Determination of antibacterial activity of antibacterial finished products (log UFC/ml growth between 0 H and 24 H) Strain/Sample Textile Control +B1 2% +MPs + B1 2% S. aureus 3.1 8.7 6.7 S. epidermidis 4.0 0.1 1.2 S. hominis 6.9 10.4 11.1 P. innocua 8.6 7.6 3.4

Yarn Coating

[0099] In an embodiment, the coating of the yarns was carried out in a wire coating equipment and the coating started, simultaneously, with a yarn speed of 10 m/min, a drying temperature of 110 C., 4 times of the yarn passes through the oven and cure at 150 C.

[0100] In an embodiment, the yarn coating formulations were optimized in order to reduce the excess of functional ingredient lost during the washing cycles and mitigate the colour change of the impregnated yarn. In this sense, formulations with 4.5% and 6.5% WPC were developed using binders and stabilizers. In an embodiment, for coating beige yarn 100% cotton 30 Ne was used formulations with 4.5% WPC, 5% Sorbitol (thickener), 20% Resilfix LSK (polyurethane binder) and 0.4% PZ100 (binder catalyst) at the conditions of the yarn coating procedure that have been previously described.

[0101] In addition, the knitted sample was subjected to 0 and 5 washing cycles to determine its strength. From this study it was found that after 5 washes both formulations have a high percentage of protein compared to the control (FIG. 22). In an embodiment, a viscose rayon web was selected to weave with the following 3 yarns: [0102] 1st Weft: Ne 60/2, 100% cotton, without coating (control); [0103] 2nd Weft: Ne 60/2, 100% cotton, coated with 4.5% WPC+5% Sorbitol+20% Resilfix LSK+0.4% PZ100; [0104] 3rd Weft: Ne 60/2, 100% cotton, coated with 6.5% WPC+5% Sorbitol+20% Resilfix LSK+0.4% PZ10.

[0105] In an embodiment, during weaving, the coated yarns showed a great predisposition to break, which reflects the high friction values already mentioned, resulting in a low weaving performance. In order to evaluate the deodorant properties of these new fabrics with the coated yarns, GC-FID characterization for isovaleric acid (IVA) according ISO 17299-3:2014 adaptation was performed. As shown in FIG. 23, although the yarn control also has a high odour reduction value, there is a slight increase when the protein is introduced into the formulation.

[0106] In an embodiment, in order to evaluate the antimicrobial effect of the fabrics, they were subjected to the test according to the standard ISO 20743TextilesDetermination of antibacterial activity of antibacterial finished products for the bacteria responsible for the degradation of sweat in compounds with unpleasant odours (S. hominis and S. epidermidis) and one of the bacteria referred to in the standard (S. aureus).

[0107] The term comprising whenever used in this document is intended to indicate the presence of stated features, integers, steps, components, but not to preclude the presence or addition of one or more other features, integers, steps, components or groups thereof.

[0108] Where ranges are given, endpoints are included. Furthermore, it is to be understood that unless otherwise indicated or otherwise evident from the context and/or the understanding of one of ordinary skill in the art, values that are expressed as ranges can assume any specific value within the stated ranges in different embodiments of the invention, to the tenth of the unit of the lower limit of the range, unless the context clearly dictates otherwise. It is also to be understood that unless otherwise indicated or otherwise evident from the context and/or the understanding of one of ordinary skill in the art, values expressed as ranges can assume any subrange within the given range, wherein the endpoints of the subrange are expressed to the same degree of accuracy as the tenth of the unit of the lower limit of the range.

[0109] The disclosure should not be seen in any way restricted to the embodiments described and a person with ordinary skill in the art will foresee many possibilities to modifications thereof.

[0110] The above described embodiments are combinable.

[0111] The following claims further set out embodiments of the disclosure.

[0112] This project has received funding from the European Regional Development Fund through the Operational Program for Competitiveness and Internationalization of PORTUGAL2020 under grant agreement No POCI-01-0247-FEDER-024523.