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A kind of tblc activated hydrogen peroxide system cotton fabric pad steam bleaching method

A fabric and system technology, applied in textiles and papermaking, etc., can solve the problems of unstable bleaching effect, weakened bleaching effect, low peroxyacid activity, etc. Effect

Active Publication Date: 2018-12-04
JIANGSU LIANFA TEXTILE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TBCC / H 2 o 2 It is currently used in the cold pad-batch process, which can shorten the swelling and stacking time of the fabric and improve production efficiency. However, when the concentration of hydrogen peroxide in the system is too high during low-temperature, near-neutral leaching and bleaching, some peroxyacids will Side reactions occur with it, causing ineffective decomposition and reducing bleaching efficiency
In TBCC / H 2 o 2 When applied to the cold pad batch bleaching process, the experimental results show that when the concentration of TBCC (N-4 (triethylammonium benzoyl) caprolactam chloride) is increased to the range of 25-100g / L, the bleaching effect is unexpectedly weakened; Dynamic adsorption experiments show that this is most likely due to the use of higher TBCC concentrations, the increased adsorption of TBCC and peroxyacids on cotton fabrics, and the lower activity of peroxyacids, thereby limiting the bleaching efficiency. ; such limitations are particularly fatal in cold pad batch bleaching of cotton fabrics where high concentrations of TBCC are required
[0004] Therefore, it is necessary to improve the bleaching process to overcome the unstable bleaching effect of the TBLC activated hydrogen peroxide system in the current cold pad batch bleaching process that requires a higher concentration of chemicals.

Method used

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  • A kind of tblc activated hydrogen peroxide system cotton fabric pad steam bleaching method
  • A kind of tblc activated hydrogen peroxide system cotton fabric pad steam bleaching method
  • A kind of tblc activated hydrogen peroxide system cotton fabric pad steam bleaching method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Fabric: cotton knitted fabric (133g / m 2 )

[0043] Prescription: TBCC, H 2 o 2 , NaHCO 3 The molar ratio is 1:1.2:1.4, including TBCC 50g / L, stabilizer DM--14031g / L, and penetrant JFC 1g / L.

[0044] Surplus rate: 110%

[0045] Steaming: Treat for 2 minutes, 4 minutes, and 6 minutes respectively, and measure the fabric bleaching effect of different treatment times.

[0046] The results are shown in Table 1.

Embodiment 2

[0048] Fabric: cotton knitted fabric (133g / m 2 )

[0049] Prescription: TBCC, H 2 o 2 , NaHCO 3 The molar ratio is 1:1.2:1.4, stabilizer DM--14031g / L, penetrant JFC1g / L. Among them, TBCC were 25g / L and 75g / L respectively.

[0050] Surplus rate: 100%

[0051] Steaming time: 2min.

[0052] The results are shown in Table 1.

[0053] Bleaching effect under different steaming time in table 1

[0054]

[0055] Among them, the conventional hydrogen peroxide bleaching method: H 2 o 2 (30%w / v)6g / L, NaOH 3g / L, penetrant JFC 1g / L, stabilizer DM-14031g / L, 95°C, rotating speed 30r / min, bath ratio 1:20, treatment for 10min, 20min, 30min, 40min, 50min, 60min. After the experiment was completed, the sample was thoroughly cleaned with a large amount of deionized water to avoid adverse effects of residual surfactant on the subsequent performance test, and it was dried under natural conditions for use; among them, the treatment time was 10min, 20min, 30min, 40min, The whiteness af...

Embodiment 3

[0060] Fabric: Regenerated Bamboo Viscose Fiber (139g / m 2 )

[0061] Prescription: TBCC, H 2 o 2 , NaHCO 3 The molar ratio is 1:1.2:1.4, stabilizer DM--14035g / L, penetrant JFC5g / L. Among them, TBCC is 25, 100g / L respectively.

[0062] Surplus rate: 100%

[0063] Steaming time: 2min.

[0064] The results are shown in Table 3. Wherein the conventional hydrogen peroxide bleaching method is consistent with Table 1.

[0065] Bleaching effect under different treatment conditions in table 3

[0066]

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Abstract

The invention discloses a TBLC (N-[4-(trialkylammoniomethyl)benzoyl]lactam chloride) activated hydrogen peroxide system cotton fabric pad-steam bleaching method, and belongs to the field of pretreatment processing of textile. In the invention, TBCC (N-4(trialkylammoniomethyl benzoyl)caprolactam chloride) and sodium hydrogen carbonate (NaHCO3) are compounded to prepare a TBCC / H2O2 / NaHCO3 system for near neutral bleaching of a cotton fabric; and the fabric is put in a padding-bleaching bath and then steamed for bleaching. According to the invention, the whiteness of a fabric treated by the TBCC / H2O2 / NaHCO3 pad-steam system for 2 minutes is similar to the whiteness of the fabric treated by a H2O2 / NaOH dip bleaching system for 60 minutes; the CIE whiteness of the fabric can be up to 75 or above; and meanwhile, the wettability of the treated fabric is improved, and damage to the fabric is reduced. The method disclosed by the invention consumes less water, a fabric only needs a certain pickup rate, and a certain volume of solution can treat a large number of fabrics, thereby effectively reducing wastewater treatment, and achieving the advantages of energy saving, environment friendliness, short required treatment time and high bleaching efficiency.

Description

technical field [0001] The invention relates to a cotton fabric pad-steam bleaching method with a TBLC activated hydrogen peroxide system, belonging to the field of pretreatment processing of textiles. Background technique [0002] Cotton fabrics need to be bleached before dyeing and finishing to remove natural pigment impurities in cotton fibers. The conventional bleaching process of cotton fabrics usually uses hydrogen peroxide (H 2 o 2 ) as an oxidant for bleaching has the disadvantages of high energy consumption, heavy waste water treatment burden, and serious fiber damage. [0003] It has been reported that the bleach activator N-[4-(trialkylammoniummethylene)benzoyl]lactam chloride (TBLC) can react with H in near-neutral aqueous solution. 2 o 2 reaction to generate more active 4-(trialkylammoniummethylene)peroxybenzoic acid in situ, and when the pH is close to 7 at low temperature, the cotton fabric can be bleached better and get better whiteness. In the long-term...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06L4/12D06L4/13
Inventor 唐文君许长海彭明华向中林于拥军姚金龙杜金梅孙昌钱晓红陈森孙月玲
Owner JIANGSU LIANFA TEXTILE