How To Choose The Appropriate Scouring Penetrant

In general, textile fibers are refined before dyeing and finishing processing to remove natural impurities on the fiber (such as: wax, pectin, nitrogen compounds, cottonseed shells); As well as the textile slurry and oil to improve the water absorption and softness of the fiber, to facilitate the adsorption and diffusion of dyes in the printing and dyeing process. If the scouring is not complete and uneven, it will cause uneven dyeing, poor color quantity, poor fastness and other problems, which will seriously affect the quality and grade of the product, and in order to spot the EU and other non-toxic laws, the additives used must also meet the requirements of environmental protection. Therefore, according to the type of fiber, fabric and the process and equipment used, it is very important to choose the right refining penetrant.

First, the following is the evaluation of refined penetrant, the general routine and simple detection methods are introduced:

1. Permeability: Foaming scouring agent 2g/L

1.A. Do not adjust pH; b. Adjust pH12.0.

1.2. Test the settling speed with standard canvas settling method (test liquid 500ml).

1.3. Test at least 3 times, take 2 times of similar calculation average.

2 Foaming: (shock method or ventilation method or juice machine method)

2.1. Take 50cc of foaming refining agent 2g/L and put it into a measuring cylinder with bolt. Shake it up and down for 30 times.

2.2. Record: instant, 15 seconds, 30 seconds, 1 minute, 2 minutes, 3 minutes foam height.

3. Cleaning power:

3.1. Foaming detergent 3g/L.

3.2. Undesized cloth.

3.3 Bath ratio 1:10. Treatment conditions 98℃×30 min.

3.4. After drying, moisture regain O.5h or more to measure the gross effect (climbing speed).

* Gross effect: Take a piece of cloth 10cm long and 2.5cm wide. Draw a line at 1cm, 2cm, 3cm, 5cm. Record the climb time (fast speed means strong cleaning force).

4. Emulsification:

4.1. Take 109 scouring agent +3%Na0H 40ml+10g dimethyl silicone oil.

4.2. Put it into the measuring cylinder and shake it well. Record: instant, 2h, 24h emulsion layer height.

5. Alkaline resistance: Foaming scouring agent 2g/L

5.1. Test as required: 0g/L, 5g/L, 10g/L, 20g/L...... .

5.2. Observe whether there is oil slick: Record: immediate, 2h, 24h(generally without oil slick for 24h).

6. Temperature resistance: scouring agent 2g/L

6.1.a. Do not add alkali; b Add 2g/L base.

6.2. Take 400ml of each test liquid and place it in the testing machine for 100℃x60 minutes.

6.3. Check whether there is an oil slick after taking it out.

Second, according to different fibers and processes. Equipment, Shanghai Zexing company will refine penetrant, according to product characteristics to do classification, and make the following recommendations.

Refining penetrant selection series list:

1. Powerful low-foam detergent Sinmorle FS-220 and Sinmorle FS-50

Suitable for all kinds of fibers, especially recommended for knitted fabrics.

Excellent emulsification and permeability for removing oils.

Good high temperature resistance, can be used for high pressure scouring and Relax dyeing in one bath.

☆ Reference dosage: 0.5 ~ 1.0g/L

2. Powerful detergent Sinmorle L-25, FS-30conC.

Suitable for all kinds of fibers; It is especially recommended as an penetrant for enzymatic desizing of colored fabrics.

With excellent emulsification and strong permeability, it has excellent removal effect on oil and wax that are difficult to remove.

Has excellent alkaline resistance, can be used with oxidation or enzyme desizing agent, reducing bleach, good stability.

Especially recommended for washing and carbonizing Wool and its blended fabrics.

☆ Reference dosage: 0.5 ~ 2.0g/L

3. Alkali-resistant scouring penetrant Sinmorle SP-450, SinmorleSP-420

? It is suitable for cold rolling pretreatment of cellulose and its blends

? Alkali, acid and high temperature resistance.

Low foamability, excellent alkali permeability resistance, can withstand more than 80g/L of alkali tablets.

Suitable for denim dyeing preparation of high concentration mother liquor has good stability.

☆ Reference dosage: 0.6-12.0g/L(denim dyeing 0.5 ~ 3.0g/L)

4. Alkali-resistant scouring penetrant Sinmorle SP-350, SinMORLESP-320

It is suitable for cellulose fiber. In continuous boiling and bleaching process, the high concentration mother liquor has good stability.

Alkali, acid and high temperature resistance.

Strong permeability, low foaming, can be operated at high cloth speed (100m/min or more).

Excellent alkali permeability resistance, can withstand more than 180g/L of alkali tablets.

☆ Reference dosage: 3.0-6.0g /L

5. Dyeing a bath agent Sinmorle SP-521

Suitable for knitting and bobbin yarn dark system (such as wine red, black, navy blue, etc.) refining, dyeing one bath processing.

It has many functions such as emulsification, permeability wetting, chelating dispersion, levelling and wrinkle-proof.

Silicon free, almost vacuum-free, improves dyeing evenness and reproducibility on bobbin yarn

Compared with traditional technology, it can improve production efficiency, save energy and reduce emission

Less damage to the yarn, maintain better strength and feel

Free of APEO and phosphate

☆ Reference dosage: 1.5 ~ 3.0g/L

Iii. Conclusion

According to the traditional cellulose fiber pre-treatment of desizing, boiling, bleaching three-step process, although stable and good reproducibility, but because of the machine, large energy consumption, long time, low efficiency has not the current development trend, shorten the process, energy saving and consumption reduction, improve efficiency and environmental protection products are the current development direction. But the same scouring penetrant should have: good permeability, low foaming, good cleaning, good emulsification, high alkali resistance, temperature resistance... Although it is an ideal condition for everyone to pursue, so far there is no additive production plant that can meet these requirements.

Therefore, the selection of today's scouring penetrant only needs to set the fiber, equipment and process, and then according to the demand, do the primary project, secondary project selection can be. For example:

In the non-continuous process, the primary project is to select low-foam, high-emulsified soil products; The primary project of the semi-continuous process is to select products with high emulsification power and strong permeability: the primary project of the continuous process is to select products with high alkali resistance and strong permeability.以上翻译结果来自有道神经网络翻译（YNMT）· 通用场景