Waterproof and anti-fuzzing process for cotton-polyester blended fabric

Abstract

The waterproof and anti-fuzzing process comprises the following steps that a, the cotton-polyester blended fabric is subjected to padding, the liquid carrying rate after padding is 60%-70%, a working solution used for padding contains a fluoride-free waterproof agent FF01 and a cross-linking agent MK, and a product A is obtained; b, the product A is pre-dried for 50-70 s at the pre-drying temperature of 120-140 DEG C, and a product B is obtained; c, the product B is baked for 160-200 s at the baking temperature of 160-180 DEG C, and a finished product is obtained. In the step a, before padding, pretreatment including desizing, singeing, refining bleaching and mercerizing is sequentially conducted on the cotton-polyester blended fabric, and the concentration of caustic soda used when the cotton-polyester blended fabric is mercerized is 160-240 g / L. The method has the advantages that the cotton-polyester blended fabric is good in waterproof effect, good in anti-fuzzing effect and soft in hand feeling.

Description

Technical Field

[0001] This invention belongs to the field of cotton-polyester blended fabrics, and particularly relates to a waterproof and anti-pilling process for cotton-polyester blended fabrics. Background Technology

[0002] Waterproofing agents can give cotton-polyester blended fabrics waterproof properties, and can be divided into two types based on whether they contain fluorine. Fluorinated waterproofing agents are mostly polyurethane-based. Their characteristics include excellent waterproofing, a soft hand feel, and resistance to pilling. However, they are less environmentally friendly, posing risks of environmental residue and bioaccumulation, which does not align with green environmental trends. Fluorine-free waterproofing agents are environmentally friendly, but their waterproofing effect is relatively poor, and the treated fabric is prone to pilling, leading to a deterioration in appearance after use. Summary of the Invention

[0003] The purpose of this invention is to provide a waterproof and pill-resistant process for cotton-polyester blended fabrics. This invention offers the advantages of providing cotton-polyester blended fabrics with excellent waterproof and pill-resistant properties, as well as a soft hand feel.

[0004] The technical solution of this invention: a waterproof and pill-resistant process for cotton-polyester blended fabrics, comprising the following steps:

[0005] a. Impregnate the cotton-polyester blended fabric. The liquid retention rate after impregnation is 60-70%. The working liquid used for impregnation contains fluorine-free waterproofing agent FF01 and crosslinking agent MK to obtain product A.

[0006] b. Pre-dry product A for 50-70 seconds at a temperature of 120-140℃ to obtain product B;

[0007] c. B products are baked for 160-200 seconds at a temperature of 160-180℃ to obtain the finished product.

[0008] In the aforementioned waterproof and anti-pilling process for cotton-polyester blended fabrics, in step a, before impregnation, the cotton-polyester blended fabric undergoes pretreatment including desizing, singeing, refining and bleaching, and mercerizing.

[0009] In the aforementioned waterproof and anti-pilling process for cotton-polyester blended fabrics, in step a, the concentration of caustic soda used when mercerizing the cotton-polyester blended fabric is 160-240 g / L; in step c, product B is pre-shrinked after baking to obtain the finished product.

[0010] In the aforementioned waterproof and anti-pilling process for cotton-polyester blended fabrics, in step a, the concentration of caustic soda used when mercerizing the cotton-polyester blended fabric is 210 g / L.

[0011] In the aforementioned waterproof and anti-pilling process for cotton-polyester blended fabrics, in step a, the concentration of the fluorine-free waterproofing agent FF01 is 70-90 g / L, and the concentration of the crosslinking agent MK is 15-25 g / L.

[0012] In the aforementioned waterproof and anti-pilling process for cotton-polyester blended fabrics, in step a, the working solution contains 45-55 g / L of ACNNEW and 8-12 g / L of crosslinking agent SFB, and the pH of the working solution is 5.5-6.5.

[0013] In the aforementioned waterproof and anti-pilling process for cotton-polyester blended fabrics, the concentration of the fluorine-free waterproofing agent FF01 is 80 g / L, the concentration of the crosslinking agent MK is 20 g / L, the concentration of the crosslinking agent ACN NEW is 50 g / L, and the concentration of the crosslinking agent SFB is 10 g / L. The pH of the working solution is adjusted to 5.5-6.5 by adding a pH adjuster.

[0014] In the aforementioned process for waterproofing and preventing pilling of cotton-polyester blended fabrics, the pH adjuster is acetic acid.

[0015] In the aforementioned process for waterproofing and preventing pilling of cotton-polyester blended fabrics, in step b, product A is pre-dried for 60 seconds at a temperature of 130°C.

[0016] In the aforementioned waterproof and anti-pilling process for cotton-polyester blended fabrics, in step c, product B is baked for 180 seconds at a temperature of 170°C.

[0017] Compared with existing technologies, this invention selects a fluorine-free waterproofing agent FF01 from among the many waterproofing agents on the market, and combines it with other auxiliaries to form a working solution. After the cotton-polyester blended fabric is impregnated with the working solution, it is first pre-dried and then baked. Through further optimization of process parameters, the final product is obtained. The finished product has a waterproof rating of 4 before washing, a waterproof rating of 3.5 after washing, and a pilling rating of 4. It has good waterproof and anti-pilling effects and a soft hand feel.

[0018] In this invention, the fabric absorbs a large amount of water-containing working liquid after impregnation. If it is directly dried at high temperature, the rapid vaporization of water will cause the waterproofing agent molecules to migrate to the fabric surface and the "channels" between the yarns, resulting in a "migratory" phenomenon. This leads to uneven distribution of the waterproofing agent concentration, with more waterproofing agent on the fabric surface forming hard spots, resulting in a stiff fabric feel. Insufficient waterproofing agent inside the fabric fibers reduces the adhesion of the waterproof film, significantly decreasing wash resistance and making the waterproof performance easily deteriorate after washing. This invention uses low-temperature pre-drying to initially form a film and fix the waterproofing agent, effectively avoiding the "migratory" phenomenon and helping the fabric remain soft and waterproof for a long time.

[0019] Furthermore, this invention sets requirements for the concentration of caustic soda used in the mercerizing process of fabric pretreatment. A caustic soda concentration of 210 g / L can ensure good anti-pilling effect while taking into account the cost of caustic soda. Detailed Implementation

[0020] The present invention will be further described below with reference to embodiments, but these embodiments are not intended to limit the scope of the invention.

[0021] Example: A waterproof and pill-resistant process for cotton-polyester blended fabrics, comprising the following steps:

[0022] a. First, the cotton-polyester blended fabric undergoes pretreatment including desizing, singeing, refining and bleaching, and mercerizing. In this example, the pretreatment is a conventional process, and the mercerizing solution is caustic soda. Then, the cotton-polyester blended fabric is dipped and rubbed. The liquid retention rate after rubbing is controlled at 60-70%. The working solution used for rubbing contains fluorine-free waterproofing agent FF01, crosslinking agent MK, ACN NEW, and crosslinking agent SFB. By adding a pH adjuster (acetic acid), the pH of the working solution is adjusted to 5.5-6.5 to obtain product A.

[0023] Fluorine-free waterproofing agent FF01: Purchased from Wuxi Ruidekai Chemical Technology Co., Ltd. Originally used for waterproofing leather products, it has no application in the textile industry. In the examples, it is used to construct a hydrophobic film layer to achieve initial waterproofing.

[0024] Crosslinking agent MK: Produced by Wuxi Ruidekai Chemical Technology Co., Ltd., used in the examples to increase fiber crosslinking and improve durability.

[0025] ACN NEW: Originally manufactured by Huntsman and later acquired by Argon, it is used in the embodiments to form a flexible film layer, reduce fiber friction, and improve the fabric's resistance to pilling.

[0026] Crosslinking agent SFB: In the examples, it is used to enhance the bonding force between the film and the fiber.

[0027] The cotton-polyester blended fabric in the example is TC65 / 35 fabric (cotton-polyester twill 250g), with polyester content of 65% and cotton content of 35%.

[0028] b. Pre-dry product A for 60 seconds at a temperature of 130°C to remove some moisture and form a preliminary film, thus obtaining product B.

[0029] c. Baking product B allows it to complete a cross-linking reaction, forming a stable structure. Then, pre-shrink product B to obtain the finished product. Pre-shrinking is a common finishing process for fabrics. It uses physical or chemical methods to eliminate stress generated during dyeing and finishing, allowing the fabric to undergo some natural shrinkage beforehand, thus controlling the shrinkage rate after washing.

[0030] The relevant parameters in the above process were adjusted. The adjustment variables included: the concentration of caustic soda during mercerizing, the concentrations of fluorine-free waterproofing agent FF01, crosslinking agent MK, ACN NEW, and crosslinking agent SFB, and the baking temperature and baking time in step c. The finished product obtained after adjustment was tested, and the test items included: waterproofing level before washing, waterproofing level after washing, and pilling level.

[0031] During the development of this invention, numerous combined experiments were conducted on the above-mentioned multiple variables. Representative cases are recorded in Tables 1, 2, and 3 below. In all tables, temperature is in °C, time is in seconds, and concentration is in g / L.

[0032] Table 1

[0033]

[0034] Table 2

[0035]

[0036] Table 3

[0037]

[0038] As shown in Table 1, when using the same mercerizing concentration of 210 g / L, the best results that can be obtained from the finished product are: waterproof rating of 4 before washing, 3.5 after washing, and pilling rating of 4. Considering the overall energy consumption cost and auxiliary agent cost, the preferred combination of variables is: 80 g / L of fluorine-free waterproofing agent FF01, 20 g / L of crosslinking agent MK, 50 g / L of ACN NEW, 10 g / L of crosslinking agent SFB, baking temperature of 170℃, and baking time of 180 s.

[0039] The main difference between Table 2 and Table 1 lies in the mercerization concentration, with Table 2 using a lower concentration of 160 g / L. Comparing Table 2 and Table 1, it can be found that the decrease in mercerization concentration leads to a decrease in the pilling level. This is presumably due to the effect of mercerization concentration on the fabric yarn; the yarn twisting degree decreases, and the yarn cohesion decreases, making it more prone to pilling.

[0040] The main difference between Table 3 and Table 1 lies in the mercerizing concentration; Table 3 uses a higher concentration of 240 g / L. Comparing Table 3 and Table 1, it can be seen that further increases in mercerizing concentration result in essentially no change, but they do increase mercerizing costs.

[0041] Comparative Example 1: Based on Table 1 of Example 1, the working solution formula was changed, the relevant parameters were adjusted, and the results were tested to obtain Tables 4 and 5.

[0042] Table 4

[0043]

[0044] Table 5

[0045]

[0046] As can be seen from Tables 4 and 5, after replacing the fluorine-free waterproofing agent FF01 and crosslinking agent MK in the examples with common types of waterproofing agents and crosslinking agents used in the textile industry, it was impossible to achieve both a good waterproofing rating and a good pilling rating at the same time.

[0047] Comparative Example 2: To further verify the effect of mercerization concentration on the anti-ballooning level, the mercerization concentration was adjusted based on cases 4, 5, and 6 in Table 4 to obtain the results in Tables 6 and 7.

[0048] Table 6

[0049]

[0050] Table 7

[0051]

[0052] As can be seen from the comparison of Tables 4, 6, and 7, a decrease in mercerizing concentration leads to a decrease in the pilling grade, while a further increase in mercerizing concentration results in virtually no change. 210 g / L is verified as the preferred concentration.

Claims

1. A waterproof and pill-resistant process for cotton-polyester blended fabrics, characterized in that: Includes the following steps, a. Impregnate the cotton-polyester blended fabric. The liquid retention rate after impregnation is 60-70%. The working liquid used for impregnation contains fluorine-free waterproofing agent FF01 and crosslinking agent MK to obtain product A. b. Pre-dry product A for 50-70 seconds at a temperature of 120-140℃ to obtain product B; c. B products are baked for 160-200 seconds at a temperature of 160-180℃ to obtain the finished product.

2. The waterproof and pilling-resistant process for cotton-polyester blended fabrics according to claim 1, characterized in that: In step a, before impregnation, the cotton-polyester blended fabric undergoes pretreatment including desizing, singeing, refining and bleaching, and mercerizing.

3. The waterproof and pilling-resistant process for cotton-polyester blended fabrics according to claim 2, characterized in that: In step a, the concentration of caustic soda used when mercerizing the cotton-polyester blended fabric is 160-240 g / L; in step c, product B is pre-shrinked after baking to obtain the finished product.

4. The waterproof and pilling-resistant process for cotton-polyester blended fabrics according to claim 3, characterized in that: In step a, the concentration of caustic soda used when mercerizing the cotton-polyester blended fabric is 210 g / L.

5. The waterproof and pilling-resistant process for cotton-polyester blended fabrics according to claim 1, characterized in that: In step a, the concentration of the fluorine-free waterproofing agent FF01 is 70-90 g / L, and the concentration of the crosslinking agent MK is 15-25 g / L.

6. The waterproof and pilling-resistant process for cotton-polyester blended fabrics according to claim 5, characterized in that: In step a, the working solution contains 45-55 g / L of ACN NEW and 8-12 g / L of crosslinking agent SFB, and the pH of the working solution is 5.5-6.

5.

7. The waterproof and pilling-resistant process for cotton-polyester blended fabrics according to claim 6, characterized in that: The concentration of the fluorine-free waterproofing agent FF01 is 80 g / L, the concentration of the crosslinking agent MK is 20 g / L, the concentration of the ACN NEW is 50 g / L, and the concentration of the crosslinking agent SFB is 10 g / L. The pH of the working solution is adjusted to 5.5-6.5 by adding a pH adjuster.

8. The waterproof and pilling-resistant process for cotton-polyester blended fabrics according to claim 7, characterized in that: The pH adjuster is acetic acid.

9. The waterproof and pilling-resistant process for cotton-polyester blended fabrics according to claim 1, characterized in that: In step b, product A is pre-dried for 60 seconds at a temperature of 130°C.

10. The waterproof and pilling-resistant process for cotton-polyester blended fabrics according to claim 1, characterized in that: In step c, product B is baked for 180 seconds at a temperature of 170°C.

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