Background
The pure cotton fabric has the advantages of comfort in wearing, air permeability, moisture absorption, soft hand feeling and the like, but the cotton fabric has the defects of poor elasticity, easy deformation, easy wrinkling, need of ironing after washing and the like in the using process, so that the cotton fabric cannot keep a smooth appearance after washing and in the using process. Therefore, in order to improve the appearance of cotton fabric in the wearing process, maintain the stability of the shape of the cotton fabric and improve the wearability of the cotton fabric, crease-resistant finishing of pure cotton garment materials is necessary.
At present, the anti-wrinkle finishing agent commonly used in the anti-wrinkle finishing is mainly urea-formaldehyde derivative resin finishing agent, namely, the structure of the anti-wrinkle finishing agent contains an N-hydroxymethyl derivative structure, such as 2D or modified 2D resin. The fabrics finished by the resin finishing agent have the problem of releasing formaldehyde. There is therefore a need for safer formaldehyde-free crease-resistant finishes.
The formaldehyde-free crease-resistant finishing agent comprises natural high molecular compounds such as glyoxal-amide compounds, reactive organosilicon compounds, water-based thermal reactive polyurethane, chitosan and polycarboxylic acid compounds, wherein the cotton fabrics finished by the formaldehyde-free finishing agent such as glyoxal-amide compounds have the defects of yellowing, serious strength loss or poor finishing effect, and the polycarboxylic acid compounds are considered to be most likely to replace N-hydroxymethyl finishing agents by comprehensively considering the factors in various aspects such as crease resistance, strength retention rate, environmental protection, cost, color change and the like of the finished fabrics. At present, the polycarboxylic acid compounds used for crease-resistant finishing are 1,2,3, 4-butanetetracarboxylic acid, citric acid, maleic acid, itaconic acid, polymaleic acid and the like, wherein the 1,2,3, 4-butanetetracarboxylic acid and citric acid have the most application development prospect, but the 1,2,3, 4-butanetetracarboxylic acid is higher in cost and is not suitable for large-scale application, and the fabrics treated by the citric acid are easy to yellow. Malic acid is used as a polycarboxylic acid, has the effects of resisting wrinkles, preventing yellowing, releasing no formaldehyde, and having low price but large strength loss, and seriously influences the wearability of the fabric.
Disclosure of Invention
The purpose of the invention is as follows: the method for crease-resistant finishing of the cotton fabric overcomes the defects in the prior art, has good crease-resistant effect, does not release formaldehyde, and is not easy to change color.
The technical scheme is as follows: in order to achieve the aim, the technical scheme of the invention provides a method for performing aldehyde-free crease-resistant finishing on cotton fabrics, which comprises the following steps:
the method comprises the following steps: putting the scoured and bleached pure cotton cloth into a mixed solution of malic acid, sodium hypophosphite, triethanolamine stearate quaternary ammonium salt softening agent and penetrating agent JFC for soaking, soaking twice and rolling twice, and controlling the percent of rolling over to be 90-100%;
step two: oven drying, baking, soaping, and oven drying.
In the first step, the concentration of malic acid is 2.0-10.0 wt%, the concentration of sodium hypophosphite is 2.0-10.0 wt%, the concentration of triethanolamine stearate quaternary ammonium salt softener is 0.2 wt%, the concentration of penetrating agent JFC is 0.08 wt%, and the balance is water.
In the second step, the drying temperature is 80-100 ℃.
In the second step, the drying time is 2-11 min.
In the second step, the baking temperature is 120-200 ℃.
In the second step, the baking time is 1.5-3.0 min.
Has the advantages that: compared with the prior art, the invention has the following advantages:
crease-resistant shape effectual of preapring for an unfavorable turn of events: the malic acid is used as an anti-wrinkle finishing agent, and sodium hypophosphite with a catalytic effect, a nontoxic softening agent and a penetrating agent are added at the same time, so that the malic acid modified anti-wrinkle finishing agent is used for anti-wrinkle finishing processing of cotton fabrics, the anti-wrinkle effect is ensured, the problems of high anti-wrinkle finishing strength and high wear resistance loss in the past are solved, and meanwhile, the fabric does not have a yellowing phenomenon.
Economic and environment-friendly: the anti-wrinkle finishing agent is formed by reasonably proportioning the malic acid, the catalyst, the softening agent and the penetrating agent, is green and environment-friendly, does not release toxic and harmful substances such as formaldehyde and the like, is safe and safe, reduces the production cost, and has certain popularization and application values in production.
Detailed Description
The invention is further described below with reference to examples, but the scope of the invention as claimed is not limited to the scope shown by the examples.
A method for carrying out aldehyde-free crease-resistant finishing on cotton fabrics comprises the following specific implementation modes:
example 1:
the pure cotton cloth is known to have an original breaking strength of 895N and a crease recovery angle of 89 °.
Putting the bleached pure cotton cloth into a mixed solution of 2.0 wt% of malic acid, 5.0 wt% of sodium hypophosphite, 0.2 wt% of triethanolamine stearate quaternary ammonium salt softening agent, 0.08 wt% of penetrating agent JFC and the balance of water for soaking, controlling the rolling retention rate to be 90% by two-soaking and two-rolling, drying at 100 ℃ for 2 min, then drying at 180 ℃ for 2 min, and finally soaping and drying. According to the national standards GB/T3923.2-2013 and GB/T3819, the strength retention of the cotton fabric is 55.0% and the crease recovery angle is 176 degrees.
Example 2:
the pure cotton cloth is known to have an original breaking strength of 895N and a crease recovery angle of 89 °.
Putting the bleached pure cotton cloth into a mixed solution of 10.0 wt% of malic acid, 5.0 wt% of sodium hypophosphite, 0.2 wt% of triethanolamine stearate quaternary ammonium salt softening agent, 0.08 wt% of penetrating agent JFC and the balance of water for soaking, controlling the rolling residual rate to be 90% by two soaking and two rolling, drying at 100 ℃ for 2 min, then drying at 180 ℃ for 2 min, and finally soaping and drying. According to the national standards GB/T3923.2-2013 and GB/T3819, the strength retention of the cotton fabric is 61.6% and the crease recovery angle is 204 degrees.
Example 3:
the pure cotton cloth is known to have an original breaking strength of 895N and a crease recovery angle of 89 °.
Putting the scoured and bleached pure cotton cloth into a mixed solution of 8.0 wt% of malic acid, 2.0 wt% of sodium hypophosphite, 0.2 wt% of triethanolamine stearate quaternary ammonium salt softening agent, 0.08 wt% of penetrating agent JFC and the balance of water for soaking, controlling the rolling residual rate to be 90% by two soaking and two rolling, drying at 100 ℃ for 2 min, then drying at 180 ℃ for 2 min, and finally soaping and drying. According to the national standards GB/T3923.2-2013 and GB/T3819, the strength retention of the cotton fabric is 68.0% and the crease recovery angle is 164 degrees.
Example 4:
the pure cotton cloth is known to have an original breaking strength of 895N and a crease recovery angle of 89 °.
Putting the bleached pure cotton cloth into a mixed solution of 8.0 wt% of malic acid, 10.0 wt% of sodium hypophosphite, 0.2 wt% of triethanolamine stearate quaternary ammonium salt softening agent, 0.08 wt% of penetrating agent JFC and the balance of water for soaking, controlling the rolling residual rate to be 90% by two soaking and two rolling, drying at 100 ℃ for 2 min, then drying at 180 ℃ for 2 min, and finally soaping and drying. According to the national standards GB/T3923.2-2013 and GB/T3819, the strength retention of the cotton fabric is 58.6% and the crease recovery angle is 210 degrees.
Example 5:
the pure cotton cloth is known to have an original breaking strength of 895N and a crease recovery angle of 89 °.
Putting the scoured and bleached pure cotton cloth into a mixed solution of 8.0 wt% of malic acid, 5.0 wt% of sodium hypophosphite, 0.2 wt% of triethanolamine stearate quaternary ammonium salt softening agent, 0.08 wt% of penetrating agent JFC and the balance of water for soaking, controlling the rolling residual rate to be 90% by two soaking and two rolling, drying at 80 ℃ for 2 min, then drying at 180 ℃ for 2 min, and finally soaping and drying. According to the national standard GB/T3923.2-2013, a strength retention of 57.2% and a crease recovery angle of 203 ° were measured for cotton fabrics.
Example 6:
the pure cotton cloth is known to have an original breaking strength of 895N and a crease recovery angle of 89 °.
Putting the bleached pure cotton cloth into a mixed solution of 8.0 wt% of malic acid, 5.0 wt% of sodium hypophosphite, 0.2 wt% of triethanolamine stearate quaternary ammonium salt softening agent, 0.08 wt% of penetrating agent JFC and the balance of water for soaking, controlling the rolling residual rate to be 90% by two soaking and two rolling, drying at 100 ℃ for 2 min, then drying at 180 ℃ for 2 min, and finally soaping and drying. According to the national standards GB/T3923.2-2013 and GB/T3819, the strength retention of the cotton fabric is 58.5 percent and the crease recovery angle is 201 degrees.
Example 7:
the pure cotton cloth is known to have an original breaking strength of 895N and a crease recovery angle of 89 °.
Putting the scoured and bleached pure cotton cloth into a mixed solution of 8.0 wt% of malic acid, 5.0 wt% of sodium hypophosphite, 0.2 wt% of triethanolamine stearate quaternary ammonium salt softening agent, 0.08 wt% of penetrating agent JFC and the balance of water for soaking, controlling the rolling residual rate to be 100% by two soaking and two rolling, drying at 100 ℃ for 11min, then drying at 180 ℃ for 2 min, and finally soaping and drying. According to the national standards GB/T3923.2-2013 and GB/T3819, the strength retention of the cotton fabric is measured to be 56.7 percent and the crease recovery angle is measured to be 209 degrees.
Example 8:
the pure cotton cloth is known to have an original breaking strength of 895N and a crease recovery angle of 89 °.
Putting the scoured and bleached pure cotton cloth into a mixed solution with a bath ratio of 1:50, wherein the mixed solution contains 8.0 wt% of malic acid, 5.0 wt% of sodium hypophosphite, 0.2 wt% of triethanolamine stearate quaternary ammonium salt softening agent, 0.08 wt% of penetrating agent JFC and the balance of water, soaking, rolling for two times with the rolling retention rate controlled to be 90%, drying at 100 ℃ for 2 min, then drying at 120 ℃ for 2 min, and finally soaping and drying. According to the national standards GB/T3923.2-2013 and GB/T3819, the strength retention of the cotton fabric is 86.0% and the crease recovery angle is 152 degrees.
Example 9:
the pure cotton cloth is known to have an original breaking strength of 895N and a crease recovery angle of 89 °.
Putting the bleached pure cotton cloth into a mixed solution of 8.0 wt% of malic acid, 5.0 wt% of sodium hypophosphite, 0.2 wt% of triethanolamine stearate quaternary ammonium salt softening agent, 0.08 wt% of penetrating agent JFC and the balance of water for soaking, controlling the rolling residual rate to be 90% by two soaking and two rolling, drying at 100 ℃ for 2 min, then drying at 200 ℃ for 2 min, and finally soaping and drying. According to the national standards GB/T3923.2-2013 and GB/T3819, the strength retention of the cotton fabric is 51.0% and the crease recovery angle is 247 degrees.
Example 10:
the pure cotton cloth is known to have an original breaking strength of 895N and a crease recovery angle of 89 °.
Putting the scoured and bleached pure cotton cloth into a mixed solution of 8.0 wt% of malic acid, 5.0 wt% of sodium hypophosphite, 0.2 wt% of triethanolamine stearate quaternary ammonium salt softening agent, 0.08 wt% of penetrating agent JFC and the balance of water for soaking, controlling the rolling residual rate to be 90% by two soaking and two rolling, drying at 100 ℃ for 2 min, then drying at 180 ℃ for 1.5 min, and finally soaping and drying. According to the national standards GB/T3923.2-2013 and GB/T3819, the strength retention of the cotton fabric is 61.7% and the crease recovery angle is 205 degrees.
Example 11:
the pure cotton cloth is known to have an original breaking strength of 895N and a crease recovery angle of 89 °.
Putting the scoured and bleached pure cotton cloth into a mixed solution of 8.0 wt% of malic acid, 5.0 wt% of sodium hypophosphite, 0.2 wt% of triethanolamine stearate quaternary ammonium salt softening agent, 0.08 wt% of penetrating agent JFC and the balance of water for soaking, controlling the rolling residual rate to be 90% by two soaking and two rolling, drying at 100 ℃ for 2 min, then drying at 180 ℃ for 3 min, and finally soaping and drying. According to the national standards GB/T3923.2-2013 and GB/T3819, the strength retention of the cotton fabric is measured to be 56.3 percent and the crease recovery angle is measured to be 206 degrees.