RU2706132C1 - Method for fabrication of pile knitted fabrics - Google Patents

Abstract

FIELD: textile and paper.

SUBSTANCE: invention relates to textile industry and can be used in production of pile warp knitted wares from polyester fibers with printing patterns based on disperse dyes. Method includes knitting of double web connected by drawing, from textured polyester micro filament threads of linear density from 7.6 to 9.2 tex with number of filaments 36 for formation of soil system of webs and linear density from 11.5 to 15.4 tex with number of filaments 192 to form a pile cover, cutting of double web through the braces and finishing of obtained single webs, including scratching and flaking of front pile side, heat treatment of cloths, printing of pile side with paint containing, g/kg: disperse dye – 5.0–20.0; thickening agent – 35.0–45.0; triethanolamine – 10.0–30.0; oxyethylated alkylamines of series C₁₄-C₁₈ with degree of oxyethylation of 8–10 – 5.0–10.0; oxyethylirated branched high fatty alcohols of row C₁₅-C₁₇ with degree of oxyethylation of 11–13 – 5.0–15.0; oxidizing agent – 5.0–10.0; water – up to 1,000. Drying, heat fixing of paint, washing, dressing, re-drying, napping of the back side, carding of the front and back sides, flaring of the front and back sides, weaving of the back side and final finishing of the cloths. At that heat fixation of paint is carried out at temperature 180–190 °C for 3–6 minutes.

EFFECT: improved operational properties of pile knitted fabrics of polyester fibers by increasing resistance to pilling, intensity of painting, depth of painting of pile cover and clarity of printed patterns, as well as increased resistance of colors to washing, sweat and dry friction.

1 cl, 3 tbl

Description

The invention relates to the textile industry and can be used in the manufacture of pile warp knitted fabrics of polyester fibers with printed patterns based on dispersed dyes.

A known method of manufacturing pile knitted fabrics, including knitting a knitted fabric from polyester filaments of linear density 75 D (8.3 tex) with the number of filaments 36 to form the soil of the fabric and polyester filaments of linear density 75 D (8.3 tex) with the number of filaments 144 for pile formation.

The resulting fabric is dyed with a composition based on dispersed dyes and additives, alkaline treated and dried. Then, a printed pattern is applied to the pile canvas with ink based on a dispersed dye, penetrator and antifoam, dried and the ink is fixed at 170 ° C for 7 minutes.

After processing on a brush machine, teasing, shearing and heat treatment at 60 ° C, the pile cloth is sent for final finishing in a drying-tilt and stabilization machine (CN 102965807 A, class D04B 1/04; D06C 11/00; D06C 7/02; D06P 1/16; D06P 3/85, publ. 03/13/2013).

The disadvantage of this method is that it does not allow to obtain intensely colored, clear and bright patterns on white unpainted pile knitted fabrics from polyester yarns, which limits the range of pile fabrics and products made from them.

The closest analogue of the proposed technical solution is a method of manufacturing pile knitted fabrics, including knitting a double fabric connected by broaches, from polyester yarns of linear density 75-150 D (8.3-16.7 tex) for soil formation and 50-100 D (5 , 6-11.1 tex) for the formation of a pile cover; cutting a double cloth along broaches; heat treatment of the obtained single paintings at 190-210 ° C; printing the pile side with ink; carding at 170-180 ° C; varnishing and finishing (KR 101914695 B1, class D04B 21/02; D06C 11/00; D06C 13/00; D06C 15/00; D06C 3/00; D06P 5/02, published 05.11.2018).

The disadvantage of this method is the relatively low operational properties of the pile cloths, manifested in low resistance to pilling, insufficient depth of coloring of the pile cover due to migration of dyes during brushing at a temperature of 170-180 ° C, which is carried out immediately after printing ink.

The technical result of the invention is to improve the operational properties of pile knitted fabrics made of polyester fibers by increasing the resistance to pilling, the color intensity, the depth of coloring of the pile cover and the clarity of printed patterns, as well as increasing the resistance of the colors to washing, sweating and dry friction.

This result is achieved by the fact that in the method of manufacturing pile knitted fabrics, including knitting a double fabric connected by broaches, from polyester yarns, cutting the fabric by broaches and finishing the obtained single fabrics by heat treatment, printing the front pile side with paint, drying, scratching and glossing the front pile side and final finishing, as polyester threads use textured polyester microfilament threads of linear density from 7.6 to 9.2 tex with the number of filaments 36 for forming the soil system of canvases and linear density from 11.5 to 15.4 tex with the number of filaments 192 for the formation of a pile cover, scratching and glossing of the front pile side is carried out before heat treatment, after drying, heat-setting of printing ink, washing, finishing, re-drying, teasing of the underside, scratching of the front and undersides, glossing of the front and undersides and cutting of the underside, and as a printing ink, a composition containing, g / kg:

Dispersion dye 5.0-20.0 Thickener 35.0-45.0 Triethanolamine 10.0-30.0 Oxyethylated alkyl amines of the series C ₁₄ -C ₁₈ with the degree of hydroxyethylation 8-10 5.0-10.0 Oxyethylated branched higher fatty alcohols of the series C ₁₅ -C ₁₇ with a degree hydroxyethylation 11-13 5.0-15.0 Oxidizing agent 5.0-10.0 Water up to 1000

In this case, the heat setting of the paint is carried out at a temperature of 180-190 ° C for 3-6 minutes.

Knitting the soil and pile of fabric from textured polyester microfilament yarns with a linear density of 7.6-9.2 tex (f36) and 11.5-15.4 tex (f192), respectively, with the subsequent declared sequence of finishing operations allows to obtain knitted fabrics with a wear-resistant pile coating and high resistance to pilling.

Introduction to the composition of the printing ink of triethanolamine, ethoxylated alkyl amines of the C ₁₄ -C ₁₈ series with an oxyethylation degree of 8-10 as an emulsifier, oxyethylated branched higher fatty alcohols of the C ₁₅ -C ₁₇ series with an oxyethylation degree of 11-13 as a wetting agent and dispersant with the declared content components allows the composition to penetrate more deeply into the structure of the polyester fiber, destroying intermolecular bonds and loosening it with the formation of submicroscopic pores.

This helps to increase the diffusion rate of dispersed dyes, increase the depth of their penetration into the pile cover, reduce the degree of migration during subsequent drying, obtain clear and vivid patterns of intense colors, increase their resistance to various influences.

The use of other ingredients than those stated in the composition of the printing ink, or with a different content thereof, does not make it possible to obtain a deeply colored pile cover with clear and vivid patterns that are highly resistant to washing, sweat and dry friction.

As a thickener, thickeners based on esterified starch are used: Emprint CE, Prisulon P 10, Prisulon Star (Germany), sodium alginate, for example Lamalgin GS 5 (Germany), or mixtures thereof - Prisulon SM 5-10 and others.

Triethanolamine (HO-CH ₂ -CH ₂ ) ₃ N (TU 2423-168-00203335-2007) is a colorless viscous liquid with a boiling point of 360 ° C.

Oxyethylated alkylamines of the C ₁₄ -C ₁₈ series (OEAA) with a degree of oxyethylation of 8-10 are nonionic surfactants, colorless or light yellow transparent liquids with an amine number of 75-90 mg KOH / 1 g. Well soluble in water, alcohol, acetone.

Obtained by the reaction of ethylene oxide with primary aliphatic amines.

To carry out a non-catalytic reaction, fatty amines are loaded into the reactor and dehydrated in vacuum, passing nitrogen at a temperature of 130 ° C to a water content of 500 mg / kg. After drying, ethylene oxide is introduced into the reactor and the pressure in the reactor is set at 200 kPa. The beginning of the reaction is judged by an increase in temperature and a decrease in pressure. The duration of the ethoxylation process is 10-15 hours. To reduce the color of the product, ethoxylated amines are whitened with hydrogen peroxide or distilled.

Oxyethylated branched higher fatty alcohols of the C ₁₅ -C ₁₇ series (OERVHS) with a degree of hydroxyethylation of 11-13 are nonionic surfactants, they are obtained by sequential addition of ethylene oxide to the branched higher fatty alcohols of the C ₁₅ -C ₁₇ series at 150-170 ° С in the presence of 7 % alkali solution. Well soluble in water, alcohol.

They are a colorless or light yellow paste with a basic substance content of 98-99% and a cloud point of 75-80 ° C.

As an oxidizing agent, preparations based on chlorite or sodium nitrite, the sodium salt of m-nitrobenzenesulfonic acid, for example Rapidoprin XRG, Ludigol, are used.

The composition is prepared as follows:

The estimated amount of thickener is mixed with part of the water and stirred for 1-2 hours until a homogeneous mass. Then, successively with constant stirring, the calculated amounts of dispersed dyes and pre-dissolved in warm water (40-50 ° C) OEAA, OERWS, triethanolamine and oxidizing agent are introduced, adding the remaining amount of water and mixing the composition to a homogeneous consistency.

The method is as follows.

After warping of textured polyester microfilament yarns with a linear density of 7.6–9.2 tex (f36) and 11.5–15.4 tex (f192) on a GE-560 sectional warping machine (China), they knit a double warp knit with an “split plush” weave »On a two-loop five-comb warp knitting machine of 22 class, model GE 288 A (China).

After cutting the double web along broaches, the obtained single canvases have a front pile side and a wrong side.

Finishing of knitted fabrics begins with the operations of scratching and glossing the front pile side on the SME485C combing machine and the SME-472 S scrubbing machine (China). After heat treatment at 180-190 ° C in a drying-tilt-stabilization machine, the front pile side of the canvases is printed with ink containing, g / kg: dispersed dye - 5.0-20.0, thickener - 35.0-45.0, triethanolamine - 10.0-30.0, OEAA with a degree of hydroxyethylation of 8-10 - 5.0-10.0, OERVHS with a degree of hydroxyethylation of 11-13 - 5.0-15.0, an oxidizing agent - 5.0-10, 0 and water up to 1000.

The composition of the printing ink is applied using a printing machine with rotational mesh patterns from MHMS Mechatronic Solutions GmbH & Co. KG (Austria).

After drying on a drying machine, which is complete with a printing machine, disperse dyes are thermofixed in a high-temperature mat of Ikomatex company (Spain) at a temperature of 180-190 ° С for 3-6 minutes.

Then, the cloths are washed, the sizing is carried out with a softener-based compound (ISP tubingal of Bezema SNT company, Olitex MG-U of Promtkan LLC, ULTRPHIL RA of HUNTSMAN and others) and antistatic (Ruk-Stat ASY NEW of Rudolf Chemie, Kresil N-AE by UniChem-Pro LLC and others), drying at a temperature of 170-175 ° С and teasing of the seamy smooth side of the cloths on a MB 331 N pile machine (China). As a result of teasing, a fluffy soft pile is formed on the wrong side with a pattern similar to that on the front pile side.

After that, carding and glossing of the front and back sides are carried out, the back side is sheared on the MB 310 D shearing machine (China) and the final finishing is performed on the Icomatex drying-tilt-stabilization machine (Spain).

The compositions of the printing inks according to the examples are presented in table 1, the parameters of the polyester filaments and the heat setting mode are shown in table 2.

Examples 4 and 5 are control.

To conduct comparative tests, pile knitted fabrics were made using the prototype method (KR 101914695).

A double web connected by broaches was obtained from polyester filaments of linear density 110 D (12.2 tex) for soil formation and 75 D (8.3 tex) for pile formation; cut a double cloth along broaches; heat treatment of the obtained single canvases was carried out at 200 ° C. Then, the pile side was ink-printed; drying; scratching at 180 ° C; glossing and finishing on a drying-tilt-stabilization machine.

As a printing ink, ink of a standard composition according to the formulation of HANSONG INDUSTRY CO., LTD. (South Korea).

The test results of pile knitted fabrics obtained by the proposed method and prototype are presented in table 3.

The resistance to pilling by the Martindale method is determined according to GOST R ISO 12945-2-2012; Martindale abrasion resistance - according to GOST R ISO 12947-2-2011.

The color fastness to washing is determined according to GOST 9733.4-83; to sweat (method 2) - according to GOST 9733.6-83; dry friction - according to GOST 9733.27-83 (ST SEV 5444-85).

The color intensity was determined on a Spekol 11 instrument by measuring the reflection coefficient at a specific filter and wavelength. Then, according to the Kubelka-Munk table, indicators of color intensity were determined.

The depth of staining of the pile by height was evaluated visually under a microscope.

The sharpness of the outline of the figure was determined by the formula S1 / S2, where:

S1 is the area of the figure in printed form;

S2 - the area of the picture on the pile canvas.

Using the proposed method will allow to obtain pile knitted fabrics of polyester fibers with high resistance to pilling, with color resistant to various influences, intense bright colors and deep staining of the pile cover.

Such canvases can be used for the manufacture of clothing for sports and recreation, children's and home clothes, rugs, blankets, etc.

Claims (3)

1. A method of manufacturing a pile knitted fabric, including knitting a double fabric connected by broaches, made of polyester yarns, cutting the fabric by broaches and finishing the obtained single fabrics by heat treatment, printing the front pile side with paint, drying, scratching, and glossing the front pile side, and the final finishes, characterized in that as the polyester yarns use textured polyester microfilament yarns of linear density from 7.6 to 9.2 tex with the number of filaments 36 for the soil system of canvases and a linear density from 11.5 to 15.4 tex with the number of filaments 192 for the formation of a pile cover, scratching and glossing of the front pile side is carried out before heat treatment, after drying, heat-setting of printing ink, washing, sizing, re-drying, teasing of the wrong side, scratching of the right and wrong sides, glossing of the right and wrong sides, and cutting of the wrong side, and a composition containing, g / kg, is used as a printing ink: Dispersion dye 5.0-20.0 Thickener 35.0-45.0 Triethanolamine 10.0-30.0 Oxyethylated alkyl amines of the series C ₁₄ -C ₁₈ with the degree of hydroxyethylation 8-10 5.0-10.0 Oxyethylated branched higher fatty alcohols of the series C ₁₅ -C ₁₇ with a degree hydroxyethylation 11-13 5.0-15.0 Oxidizing agent 5.0-10.0 Water up to 1000 2. The method according to p. 1, characterized in that the heat setting of the printing ink is carried out at a temperature of 180-190 ° C for 3-6 minutes