Additive for ozone bleaching and ozone bleaching method

Abstract

The invention belongs to the technical field of ozone bleaching, and particularly relates to an ozone bleaching aid and an ozone bleaching method. The auxiliary agent for ozone bleaching comprises the following components: 20-30 g / L of a chelating agent; 15-25 g / L of an emulsifying penetrant; 20 to 30 g / L of alkali; 10-20 g / L of hydrogen peroxide; and water. The ozone bleaching method comprises the following steps: 1) soaking a non-woven fabric by using the auxiliary agent for ozone bleaching; (2) rolling the non-woven fabric; (3) steaming the non-woven fabric; and 4) performing ozone bleaching on the non-woven fabric. According to the auxiliary for ozone bleaching, the treatment time is shorter, the treatment effect on impurities such as pectin and cottonseed hulls on the surfaces of cotton fibers is better, the whiteness and water absorption improving effect is more obvious, and the requirement for the ozone bleaching process can be met.

Description

Technical Field

[0001] The invention belongs to the technical field of ozone bleaching, and particularly relates to an ozone bleaching auxiliary agent and an ozone bleaching method. Background Art

[0002] Existing non-woven degreasing and bleaching technology often uses a warp dyeing machine for high-temperature degreasing and bleaching treatment. The degreasing and bleaching treatment time takes more than three hours, which is a long time and consumes a lot of resources such as high-temperature steam, water and additives. One of the advantages of ozone bleaching process is that it shortens the time. After padding the additives, the steaming process should be controlled to 10-12 minutes, and the ozone bleaching treatment should be controlled to 2 minutes, so as to achieve shorter processing time, less steam and additive consumption, and lower sewage discharge compared with the existing process. In addition, the entire production line is a continuous online debleaching, which requires fewer operators and safety hazards, and the process cost is relatively low, which is more energy-saving and emission-reducing. At the same time, new requirements are also put forward for the additives used in the ozone bleaching process. The processing time should be shorter, the treatment effect of impurities such as pectin and cottonseed shells on the surface of cotton fibers should be better, and the improvement effect of whiteness and water absorption should be more obvious. After padding, steaming and ozone treatment, conventional additives will have problems such as incomplete surface impurity treatment, and the improvement effect of whiteness and water absorption is not obvious, so it needs to be improved. Summary of the invention

[0003] In order to solve the deficiencies of the prior art, the present invention provides an ozone bleaching auxiliary agent and an ozone bleaching method. The ozone bleaching auxiliary agent provided by the present invention has a shorter treatment time, a better treatment effect on impurities such as pectin and cottonseed hulls on the surface of cotton fibers, a more obvious effect on improving whiteness and water absorption, and can meet the ozone bleaching process.

[0004] The technical solution provided by the present invention is as follows:

[0005] An ozone bleaching auxiliary agent, comprising:

[0006] Chelating agent 20-30 g / L, preferably 25 g / L;

[0007] Emulsified penetrant 15-25 g / L, preferably 20 g / L;

[0008] Alkali 20-30 g / L, preferably 25 g / L;

[0009] Hydrogen peroxide 10-20 g / L, preferably 15 g / L;

[0010] And water.

[0011] In the above technical solution:

[0012] Chelating agents complex metal ions on the surface of fabrics, which can prevent precipitation on the one hand, and prevent metal ions such as iron and copper from catalyzing the decomposition of hydrogen peroxide, resulting in ineffective consumption of hydrogen peroxide, improving the stability of bleaching agents, and providing the dispersion, anti-fouling and solution buffering functions required for refining and bleaching;

[0013] The main functions of the emulsifying penetrant are as follows: emulsifying the grease on the fiber surface to prevent it from affecting the subsequent bleaching process; reducing the surface tension, making the fabric easier to be wetted and penetrated by water or other treatment liquids, improving the penetration effect of the auxiliary agent, and facilitating the subsequent bleaching or dyeing treatment; removing impurities on the fiber surface, such as gum, wax and other substances, to improve the bleaching effect;

[0014] Liquid alkali effect: provides the required pH value for the treatment liquid, which is conducive to the full effect of hydrogen peroxide; it can make the surface of the fabric swell and have a certain penetration effect;

[0015] Hydrogen peroxide: It promotes the removal of impurities such as cottonseed hulls and pectin on the fabric surface; it can be used to bleach fabrics and improve their whiteness.

[0016] Through the combined effect of the above ingredients, the treatment effect on impurities such as pectin and cottonseed hulls on the surface of cotton fibers is better, the effect on improving whiteness and water absorption is more obvious, and the effect can be achieved quickly, so it is suitable for ozone bleaching process, which can ensure that the subsequent steaming process only takes 10-12 minutes and the ozone bleaching treatment only takes 2 minutes, greatly improving production efficiency.

[0017] Specifically, the chelating agent includes the following components in percentage by weight: 8-10% of sodium diethylenetriamine pentaacetate, 1-2% of sodium hydroxide, 5-6% of sodium polyacrylate, 20-25% of sodium glutamate, 25-30% of sodium gluconate, and the balance is water.

[0018] Specifically, the emulsifying penetrant includes the following components in percentage by weight: 2-3% linear alcohol 6-9EO, 8-10% alkyl sulfonate, 8-12% isomerized 7-9EO, 8-12% C13-15 linear and branched 9-11EO, and the balance is water.

[0019] Preferably, the straight chain alcohol 6-9EO is selected from ethoxylated C12-16-alcohol (CAS No. 68551-12-2) and C16-18 fatty alcohol ethoxylate (CAS: No. 68920-66-1).

[0020] Preferably, the alkyl sulfonate is selected from sodium petroleum sulfonate (CAS No. 85711-69-9) and sodium hexadecylphenol sulfonate (CAS: No. 15015-81-3).

[0021] Preferably, the isomeric 7-9EO is selected from fatty alcohol polyether (CAS No. 166736-08-9) and fatty alcohol polyoxyethylene ether (CAS No. 68439-50-9).

[0022] Preferably, the C13-15 straight chain and branched chain 9-11EO is selected from C13-15 branched and straight chain alcohol ethoxylates (CAS No. 157627-86-6).

[0023] Specifically, the base is selected from sodium hydroxide, sodium carbonate or sodium bicarbonate.

[0024] Specifically, the hydrogen peroxide is an aqueous solution with a weight percentage of 15-20%.

[0025] The present invention also provides an ozone bleaching method, comprising the following steps:

[0026] 1) soaking the nonwoven fabric with the ozone bleaching auxiliary agent;

[0027] 2) rolling the nonwoven fabric;

[0028] 3) steaming the nonwoven fabric;

[0029] 4) Ozone bleaching of non-woven fabrics.

[0030] The above technical solution adopts the ozone bleaching auxiliary agent provided by the present invention, which can control the ozone bleaching steaming process to 10-12 minutes and the ozone bleaching treatment to 2 minutes.

[0031] Specifically, in step 1), the soaking time is 20s to 40s.

[0032] Specifically, in step 2), the amount of liquid during rolling is 125% to 175%.

[0033] Specifically, in step 2), the steaming time is 10 min to 14 min, and the steaming temperature is 92 to 98°C.

[0034] Specifically, in step 2), the ozone bleaching time is 1 min to 3 min, and the treatment temperature is 25 to 35°C.

[0035] Beneficial effects of the present invention:

[0036] The ozone bleaching auxiliary agent provided by the present invention can remove impurities such as pectin and cotton seed hulls on the surface of cotton fibers more quickly and better, and has better whiteness and water absorption effects, thereby meeting the requirements of the ozone bleaching process. DETAILED DESCRIPTION

[0037] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0038] Unless otherwise specified, the test methods used in the examples are conventional methods; the materials and reagents used are commercially available reagents and materials unless otherwise specified.

[0039] Reagents used: ethoxylated C12-16-alcohol (CAS No. 68551-12-2), C16-18 fatty alcohol ethoxylate (CAS: No. 68920-66-1), sodium petroleum sulfonate (CAS No. 85711-69-9), sodium hexadecylphenol sulfonate (CAS: No. 15015-81-3), fatty alcohol polyether (CAS No. 166736-08-9), fatty alcohol polyoxyethylene ether (CAS No. 68439-50-9), C13-15 branched and straight-chain alcohol ethoxylates (CAS No. 157627-86-6).

[0040] Example 1

[0041] An ozone bleaching method comprises the following steps:

[0042] 1) soaking the nonwoven fabric with an ozone bleaching auxiliary agent;

[0043] 2) rolling the nonwoven fabric;

[0044] 3) steaming the nonwoven fabric;

[0045] 4) Ozone bleaching of non-woven fabrics.

[0046] The auxiliary agents for ozone bleaching include: 25 g / L of chelating agent; 20 g / L of emulsifying penetrant; 25 g / L of alkali; 15 g / L of hydrogen peroxide; and water.

[0047] The chelating agent comprises the following components in percentage by weight: 8% sodium diethylenetriamine pentaacetate, 1% sodium hydroxide, 5% sodium polyacrylate, 20% sodium glutamate, 25% sodium gluconate, and the balance is water.

[0048] The emulsifying penetrant comprises the following components in percentage by weight: 2% of straight-chain alcohol 6EO, 8% of alkyl sulfonate, 8% of isomerized 7EO, 8% of C13-15 straight-chain and branched 9-11EO, and the balance is water.

[0049] The linear alcohol 6-9EO is selected from ethoxylated C12-16 alcohols. The alkyl sulfonate is selected from sodium petroleum sulfonate. The isomeric 7-9EO is selected from fatty alcohol polyethers. The C13-15 linear and branched 9-11EO is selected from ethoxylates of C13-15 branched and linear alcohols.

[0050] The base is selected from sodium hydroxide.

[0051] In step 1), the soaking time is 40 seconds.

[0052] In step 2), the amount of liquid during rolling is 175%.

[0053] In step 3), the steaming time is 14 minutes and the steaming temperature is 98°C.

[0054] In step 4), the ozone bleaching time is 3 minutes and the treatment temperature is 35°C.

[0055] Example 2

[0056] An ozone bleaching method comprises the following steps:

[0057] 1) soaking the nonwoven fabric with an ozone bleaching auxiliary agent;

[0058] 2) rolling the nonwoven fabric;

[0059] 3) steaming the nonwoven fabric;

[0060] 4) Ozone bleaching of non-woven fabrics.

[0061] The auxiliary agents for ozone bleaching include: 25 g / L of chelating agent; 20 g / L of emulsifying penetrant; 25 g / L of alkali; 15 g / L of hydrogen peroxide; and water.

[0062] The chelating agent comprises the following components in percentage by weight: 9% sodium diethylenetriamine pentaacetate, 1.5% sodium hydroxide, 5.5% sodium polyacrylate, 23% sodium glutamate, 27% sodium gluconate, and the balance is water.

[0063] The emulsifying penetrant comprises the following components in percentage by weight: 2.5% of straight-chain alcohol 6-9EO, 9% of alkyl sulfonate, 10% of isomerized 7-9EO, 10% of C13-15 straight-chain and branched 9-11EO, and the balance is water.

[0064] The linear alcohol 6-9EO is selected from C16-18 fatty alcohol ethoxylates. The alkyl sulfonate is selected from sodium hexadecylphenol sulfonate. The isomeric 7-9EO is selected from fatty alcohol polyethers. The C13-15 linear and branched 9-11EO is selected from C13-15 branched and linear alcohol ethoxylates.

[0065] The base is selected from sodium carbonate.

[0066] In step 1), the soaking time is 30 seconds.

[0067] In step 2), the amount of liquid during rolling is 150%.

[0068] In step 3), the steaming time is 12 minutes and the steaming temperature is 95°C.

[0069] In step 4), the ozone bleaching time is 2 minutes and the treatment temperature is 30°C.

[0070] Example 3

[0071] An ozone bleaching method comprises the following steps:

[0072] 1) soaking the nonwoven fabric with an ozone bleaching auxiliary agent;

[0073] 2) rolling the nonwoven fabric;

[0074] 3) steaming the nonwoven fabric;

[0075] 4) Ozone bleaching of non-woven fabrics.

[0076] The auxiliary agents for ozone bleaching include: 25 g / L of chelating agent; 20 g / L of emulsifying penetrant; 25 g / L of alkali; 15 g / L of hydrogen peroxide; and water.

[0077] The chelating agent comprises the following components in percentage by weight: 10% sodium diethylenetriamine pentaacetate, 2% sodium hydroxide, 6% sodium polyacrylate, 25% sodium glutamate, 30% sodium gluconate, and the balance is water.

[0078] The emulsifying penetrant comprises the following components in percentage by weight: 3% of straight-chain alcohol 6-9EO, 10% of alkyl sulfonate, 12% of isomerized 7-9EO, 12% of C13-15 straight-chain and branched 9-11EO, and the balance is water.

[0079] The linear alcohol 6-9EO is selected from ethoxylated C12-16 alcohols. The alkyl sulfonate is selected from sodium hexadecylphenol sulfonate. The isomeric 7-9EO is selected from fatty alcohol polyoxyethylene ethers. The C13-15 linear and branched 9-11EO is selected from ethoxylates of C13-15 branched and linear alcohols.

[0080] The base is selected from sodium bicarbonate.

[0081] In step 1), the soaking time is 20 seconds.

[0082] In step 2), the amount of liquid during rolling is 125%.

[0083] In step 3), the steaming time is 10 min and the steaming temperature is 92°C.

[0084] In step 4), the ozone bleaching time is 1 min and the treatment temperature is 25°C.

[0085] Comparative Examples 1-3

[0086] Comparative Examples 1-3 provide an ozone bleaching method. Compared with Example 1, the main differences are: no chelating agent, no emulsifying penetrant, no alkali and no hydrogen peroxide are added.

[0087] The bleaching effect test data of the nonwoven fabrics treated in Examples 1 to 3 and Comparative Examples 1 to 3 are compared, and the data are shown in the following table:

[0088] Whiteness Water absorption time / s Number of defects Example 1 91.3 2.22 none Example 2 90.2 2.65 none Example 3 88.6 3.88 less Comparative Example 1 80.1 9.36 More Comparative Example 2 76.8 15.35 More Comparative Example 3 62.3 27.61 More

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An ozone bleaching auxiliary agent, characterized in that: include: Chelating agent 20-30 g / L; Emulsified penetrant 15-25 g / L; Alkali 20-30 g / L; Hydrogen peroxide 10-20 g / L; And water.

2. The ozone bleaching auxiliary agent according to claim 1, characterized in that The chelating agent comprises the following components in percentage by weight: 8-10% of sodium diethylenetriamine pentaacetate, 1-2% of sodium hydroxide, 5-6% of sodium polyacrylate, 20-25% of sodium glutamate, 25-30% of sodium gluconate, and the balance is water.

3. The ozone bleaching auxiliary agent according to claim 1, characterized in that The emulsifying penetrant comprises the following components in percentage by weight: 2-3% of straight-chain alcohol, 8-10% of alkyl sulfonate, 8-12% of isomeric 7-9EO, 8-12% of C13-15 straight-chain and branched 9-11EO, and the balance is water.

4. The ozone bleaching auxiliary agent according to claim 3, characterized in that: The straight-chain alcohol is selected from ethoxylated C12-16-alcohols, C16-18 fatty alcohol ethoxylates; The alkyl sulfonate is selected from sodium petroleum sulfonate and sodium hexadecylphenol sulfonate; The isomeric 7-9EO is selected from fatty alcohol polyethers and fatty alcohol polyoxyethylene ethers; The C13-15 straight chain and branched chain 9-11EO are selected from ethoxylates of C13-15 branched and straight chain alcohols.

5. The ozone bleaching auxiliary agent according to claim 1, characterized in that: The base is selected from sodium hydroxide, sodium carbonate or sodium bicarbonate.

6. An ozone bleaching method, characterized in that: The following steps are involved: 1) soaking a nonwoven fabric with the ozone bleaching auxiliary agent according to any one of claims 1 to 5; 2) rolling the nonwoven fabric; 3) steaming the nonwoven fabric; 4) Ozone bleaching of non-woven fabrics.

7. The ozone bleaching method according to claim 6, characterized in that: In step 1), the soaking time is 20 to 40 seconds and the soaking temperature is 20 to 25°C.

8. The ozone bleaching method according to claim 6, characterized in that: In step 2), the amount of liquid during rolling is 125-175%.

9. The ozone bleaching method according to claim 6, characterized in that: In step 3), the steaming time is 10 to 14 minutes and the steaming temperature is 92 to 98°C.

10. The ozone bleaching method according to claim 6, characterized in that: In step 4), the ozone bleaching time is 1 to 3 minutes, and the treatment temperature is 25 to 35°C.