METHOD FOR PROCESSING ALL-POLYESTER FIBER COTTON-LIKE FABRIC WITH SUNLIGHT RESISTANCE

Abstract

The present disclosure provides a method for processing an all-polyester fiber cotton-like fabric with sunlight resistance. The method includes: 1) weaving a PTT/PET bicomponent composite stretch yarn into a fabric; 2) dyeing processing the fabric; and 3) finalizing and finishing, wherein the finalizing and finishing comprises: a) preparing a finishing liquor obtained by mixing a crosslinking agent and an emulsion of benzophenone-containing polyorganosiloxane; b) padding the fabric; and c) drying and finalizing at a high temperature.

Claims

1. A method for processing an all-polyester fiber cotton-like fabric with sunlight resistance, comprising: 1) weaving a PTT/PET (polytrimethylene terephthalate/polyethylene terephthalate) bicomponent composite stretch yarn into a fabric; 2) dyeing processing the fabric; and 3) finalizing and finishing, wherein the finalizing and finishing comprises: a) preparing a finishing liquor obtained by mixing a crosslinking agent and an emulsion of benzophenone-containing polyorganosiloxane; b) padding the fabric; and c) drying and finalizing at a high temperature.

2. The method according to claim 1, wherein the emulsion of benzophenone-containing polyorganosiloxane is prepared as follows: adding 90 g of D4 (octamethylcyclotetrasiloxane), 5 g of benzophenone-containing siloxane and 2 g of KH602 (3-(2-aminoethylamino)propyl-dimethoxymethylsilane) into a three-necked flask provided with an electric agitator, a thermometer and a reflux condenser, then stirring and mixing evenly, and heating to 90° C. or higher; adding 0.2 g of a catalyst tetramethylammonium hydroxide, then holding at 120° C. for reacting for 6 h, and distilling under reduced pressure at a gauge pressure of 0.8 MPa to remove low-boiling residues; subsequently, heating to 140° C. to decompose the catalyst tetramethylammonium hydroxide, and distilling under reduced pressure at a gauge pressure of 0.8 MPa to remove low-boiling residues again so as to obtain a colorless, transparent and viscous liquid of benzophenone-containing polyorganosiloxane; then mixing the benzophenone-containing polyorganosiloxane with an emulsifier in a mass ratio of 10:1, adding a mixture of water and acetic acid under stirring, and stirring until the resultant is transparent to obtain the emulsion of benzophenone-containing polyorganosiloxane, wherein the emulsifier is composed of iso-tridecanol polyoxyethylene ether 1307, iso-tridecanol polyoxyethylene ether 1309 and fatty alcohol polyoxyethylene ether AEO-9 in a mass ratio of 2:2:1.

3. The method according to claim 1, wherein the crosslinking agent is waterborne blocked polyurethane.

4. The method according to claim 1, wherein the PTT/PET bicomponent composite stretch yam in step 1) is a matt 100D/108F PET/PTT composite yarn with a mass ratio of PET to PTT of 1:1.

5. The method according to claim 1, wherein the dyeing processing comprises procedures of scouring, pre-finalizing, alkali peeling and dyeing of the fabric.

6. The method according to claim 5, wherein the scouring is conducted under the following formulation and conditions: treating the fabric at 100° C. for 30 min with a scouring agent of 2 g/L, a sodium carbonate concentration of 10 g/L and a bath ratio of 1:10.

7. The method according to claim 5, wherein the pre-finalizing is conducted at a temperature in a range of 190-195° C. for 30-40 s.

8. The method according to claim 5, wherein the alkali peeling is conducted under the following formulation and conditions: treating the fabric at 110° C. for 40 min with a NaOH mass concentration of 20 g/L and a bath ratio of 1:10.

9. The method according to claim 5, wherein the dyeing is conducted as follows in sequence: adding a high-temperature levelling agent and an anti-creasing softener at normal temperature; treating the fabric in a dyeing machine for 10 min; adding a disperse dye and circulating a dye liquor for 10 min; heating to 75° C.; holding at 75° C. for 10 min; heating to 90° C.; holding at 90° C. for 15 min; heating to 130° C.; holding at 130° C. for 45 min; cooling to 50° C.; draining; washing with water; reduction clearing; washing with water; taking the fabric out of a vat.

Description

EXAMPLE 1

[0042] An all-polyester fiber cotton-like fabric was prepared, which included warps and wefts. Both the warps and the wefts were matt 100D/108F PET/PTT composite yarns with a mass ratio of PET to PTT of 1:1. The technological process of the weaving included: for warp: raw material—sectional warping—leasing—healding and denting—weaving; for weft: raw material—weaving.

[0043] The parameters of the warping were as follows: a warp specification of 100D/108F composite yarn, 150 T/m.Math.Z; a total warp count of 7,416; a width of 206 cm; an upper row number of 618; a branch number of 12; a stentering strip width of 17 cm; 2 warps per 18-feather reed; an angle of 90°; a winding tension of 2 kg.

[0044] The parameters of the weaving were as follows: a loom speed of 800 r/min; a warp stop- frame depth of 5; a heald levelling time of inner warp of 340°; an opening travel of 24°; a loom setting tension of 100 KN; a weft selection of 1; a loom setting weft density of 27 wefts/cm.

[0045] The specification of the all-polyester fiber cotton-like fabric were as follows:

[0046] Width: 206 cm

[0047] Warp/weft density: 36 warps/27 wefts per cm

[0048] Reed number: 18 #

[0049] Warp per reed: 2

[0050] Total warp count: 7,416 warps

[0051] Selvedge warp count: 60×2=120 warps

[0052] Warp: matt 100D/108F PET/PTT composite yarn in a mass ratio of PET to PTT of 1:1

[0053] Weft: matt 100D/108F PET/PTT composite yarn in a mass ratio of PET to PTT of 1:1

[0054] Healding: 1-4 straight drafting

[0055] Card: plain weave

[0056] Weight per meter: 154 g/m

EXAMPLE 2

[0057] The dyeing processing of the all-polyester fiber cotton-like fabric prepared in Example 1 was conducted, including the procedures of scouring, pre-finalizing, alkali peeling and dyeing of the fabric.

1) Scouring

[0058] The formulation and conditions of the scouring were as follows:

[0059] a scouring agent of 2 g/L,

[0060] a sodium carbonate concentration of 10 g/L,

[0061] a bath ratio of 1:10, and

[0062] the fabric was dipped in the scouring agent at room temperature, then heated to 100° C. at a rate of 1.5° C./min, held at 100° C. for 30 min, cooled to 50° C. or lower at a rate of 2° C./min, followed by neutralized with an acid, and washed with water twice until the surface of the fabric was neutral.

2) Pre-Finalizing

[0063] The conditions of the pre-finalizing were as follows:

[0064] temperature/° C.: 190-195,

[0065] time/s: 30-40, and

[0066] loom speed/(m/min): 30.

3) Alkali Peeling

[0067] The formulation and conditions of the alkali peeling were as follows:

[0068] a NaOH mass concentration of 20 g/L,

[0069] a bath ratio of 1:10,

[0070] a treatment time of 40 min,

[0071] a treatment temperature of 110° C., and

[0072] the fabric was dipped in the alkali solution at room temperature, then heated to 110° C. at a rate of 1° C./min, held at 110° C. for 40 min, cooled to 50° C. or lower at a rate of 2° C./min, followed by neutralized with an acid, and washed with clean water until the surface of the fabric was neutral.

4) Dyeing

[0073] The formulation of the dyeing was as follows:

[0074] disperse dye/% (owf): x,

[0075] high-temperature levelling agent/g.Math.L.sup.−1: 1,

[0076] anti-creasing softener/g.Math.L.sup.−1: 0.5,

[0077] pH value (adjusted with glacial acetic acid): 5.5 to 6.5,

[0078] a bath ratio of 1:10.

[0079] The conditions and flow path of the dyeing were as follows:

[0080] the high-temperature levelling agent and the anti-creasing softener were added at room temperature.fwdarw.the fabric was treated in a dyeing machine for 10 min .fwdarw.the disperse dye was added and the resulting dye liquor was circulated for 10 min.fwdarw.heated to 75° C. (at a rate of 1.5° C./min).fwdarw.held at 75° C. for 10 min.fwdarw.heated to 90° C. (at a rate of 0.5° C./min).fwdarw.held at 90° C. for 15 min.fwdarw.heated to 130° C. (at a rate of 1° C./min).fwdarw.held at 130° C. for 45 min.fwdarw.cooled to 50° C. (at a rate of 1° C./min).fwdarw.drained.fwdarw.washed with water.fwdarw.reduction cleared.fwdarw.washed with water.fwdarw.the fabric was taken out of a vat.

[0081] After dyeing, the fabric was reduction cleared, which could remove the floating color on the fiber surface and improve the indicators of colorfastness.

[0082] The formulation and conditions of the reduction clearing were as follows:

[0083] 2 g/L of sodium hydrosulfite,

[0084] 2 g/L of sodium carbonate,

[0085] a bath ratio of 1:10,

[0086] temperature: 85° C., and

[0087] time: 10 min.

[0088] After reduction clearing, the fabric was neutralized with acetic acid and washed with warm water and cold water, respectively.

EXAMPLE 3

[0089] A method for processing an all-polyester fiber cotton-like fabric with sunlight resistance was performed as follows:

[0090] 1) a PTT/PET bicomponent composite stretch yarn was woven into a fabric, and the specific steps were the same as those in Example 1;

[0091] 2) the fabric was dyeing processed, and the specific steps were the same as those in Example 2;

[0092] 3) the fabric was finalized and finished as follows: [0093] a) a finishing liquor was prepared, which was an emulsion of benzophenone-containing polyorganosiloxane; [0094] b) the fabric was padded, which was performed by being dipped twice and rolled twice with a pickup of 80-90%; [0095] c) the fabric was dried and finalized at a high temperature, which was performed by being dried at 120° C. for 40-60 s and baked at 180-190° C. for 30-40 s.

[0096] The grade of water repellency was 5 before washing and was 3 after washing five times; the elasticity elongation rate was ≥20%, and the elasticity recovery rate was ≥85%; the grade of colorfastness to light was in a range of 4 to 5.

EXAMPLE 4

[0097] A method for processing an all-polyester fiber cotton-like fabric with sunlight resistance was performed as follows:

[0098] 1) a PTT/PET bicomponent composite stretch yarn was woven into a fabric, and the specific steps were the same as those in Example 1;

[0099] 2) the fabric was dyeing processed, and the specific steps were the same as those in Example 2;

[0100] 3) the fabric was finalized and finished as follows:

[0101] a) a finishing liquor was prepared, which was prepared by mixing a waterborne blocked isocyanate curing agent BL5335 and an emulsion of benzophenone-containing polyorganosiloxane emulsion in a mass ratio of 1:20;

[0102] b) the fabric was padded, which was performed by being dipped twice and rolled twice with a pickup of 80-90%;

[0103] c) the fabric was dried and finalized at a high temperature, which was performed by being dried at 120° C. for 40-60 s and baked at 180-190° C. for 30-40 s.

[0104] The grade of water repellency was 5 before washing and was 4 after washing five times; the elasticity elongation rate was ≥16%, and the elasticity recovery rate was ≥83%; the grade of colorfastness to light was in a range of 4 to 5.

[0105] Example :

[0106] A method for processing an all-polyester fiber cotton-like fabric with sunlight resistance was performed as follows:

[0107] 1) a PTT/PET bicomponent composite stretch yarn was woven into a fabric, and the specific steps were the same as those in Example 1;

[0108] 2) the fabric was dyeing processed, and the specific steps were the same as those in Example 2;

[0109] 3) the fabric was finalized and finished as follows:

[0110] a) a finishing liquor was prepared, which was prepared by mixing a waterborne blocked isocyanate curing agent BL5335 and an emulsion of benzophenone-containing polyorganosiloxane in a mass ratio of 1:18;

[0111] b) the fabric was padded, which was performed by being dipped twice and rolled twice with a pickup of 80-90%;

[0112] c) the fabric was dried and finalized at a high temperature, which was performed by being dried at 120° C. for 40-60 s and baked at 180-190° C. for 30-40 s.

[0113] The grade of water repellency was 5 before washing and was 4 after washing five times; the elasticity elongation rate was ≥12%, and the elasticity recovery rate was ≥80%; the grade of colorfastness to light was in a range of 4 to 5.

[0114] In the all-polyester fiber cotton-like fabric with sunlight resistance prepared according to the method of the present disclosure, the cotton-like effect is synthetically formed by weaving, dyeing and post-finishing. In the weaving, the mass ratio of PET/PTT components in warps and wefts, fineness, twist and warp/weft density are the major influencing factors; in the subsequent dyeing processing, both the conditions of pre-finalizing and the rate of alkali peeling have direct effects on the style and hand feeling of the fabric products; and in the post-finishing, the siloxane emulsion contributes to the soft hand feeling of fabrics and the waterproof and sunlight resistant properties.

[0115] Testing methods for the performance indicators as mentioned above were as follows: water repellency was tested under GB/T 4745-2012 “Textiles—Testing and Evaluation for Water Resistance—Spray Test Method”; elasticity was tested under FZ/T 01034-2008 “Textiles—Test Method of the Tensile Elasticity for Woven Fabrics”; colorfastness to light was tested under GB/T 8427-2019 “Textiles—Tests for Color Fastness—Color Fastness to Artificial Light: Xenon Arc”.