The invention relates to a preparation method and process of polyurethane dipping glove

- Jul 10, 2019-

Background technology:

Polyurethane immersion gloves are widely used because of their strong properties such as wear resistance and heat preservation.In the existing preparation method of polyurethane dipping gloves, a production process of polyurethane multi-layer dipping gloves is adopted, which can prepare PU coated gloves with multi-level, multi-color and thickening requirements.However, in this process, DMF is removed by soaking in 50-70℃ water for 50-60min, thus reducing the DMF content of the product to below 10ppm.However, in the actual production process, if the DMF content in gloves is too high, it is difficult to use this method to reduce the final product DMF content to less than 10ppm.


Technical implementation elements:

In view of the defect of the prior art, the invention aims to provide a preparation method of polyurethane dipping glove.

The purpose of the invention is realized through the following technical scheme:

The invention provides a preparation method of polyurethane dipping glove, and the specific steps are as follows:

A. gloves are made of synthetic fiber, or synthetic fiber and cotton blended materials;

B. Impregnate the woven gloves with PU paste;

C. Use multistage sink to clean the rubber soaked gloves after treatment in step B;

D. Dry the rubber dipped gloves after cleaning in step C;

E. Cooling, please.

Compared with prior art, the invention has the following beneficial effects:

1. The invention USES chemical fiber material instead of cotton material to produce raw gloves, which reduces the cost;

2. The invention adopts the method of knitting to knit into gloves, which avoids the waste of raw materials, improves the degree of mechanization, and further reduces the cost;

3. The production process of the invention is simple. The gloves obtained by one-dip glue and multi-stage water washing have excellent gloss and flatness;

4. The wear resistance of gloves can be improved by adding mixed auxiliary materials.

5. The invention adopts multistage washing trough to clean PU gloves, so that the DMF content of the product can be significantly reduced to as low as 5ppm, and the DMF can be recovered by distillation column for reuse, thereby reducing production cost and environmental pollution.

Technical features:

1. The preparation method of a polyurethane dipped glove is characterized by the following steps:

A. gloves are made of synthetic fiber, or synthetic fiber and cotton blended materials;

B. Dip the woven gloves into the slurry tank with PU slurry;

C. Use multistage sink to clean the rubber soaked gloves after treatment in step B;

D. Dry the rubber dipped gloves after cleaning in step C;

E. Cooling, please.

2. According to the preparation method of polyurethane impregnated gloves mentioned in claim 1, the characteristic lies in that, in step A, the preparation method of the glove billets mentioned includes the following steps: to knit the glove billets by using the whole chemical fiber, or the blended yarn of chemical fiber and cotton.

3. According to the preparation method of polyurethane dipping gloves mentioned in claim 1, the characteristic is that, in step B, the PU slurry includes the following components with percentage of mass: DMF 48%-70%, PU 25%-45%, defoamers 0.1% -1%, color paste 1% -10%.

4. According to the preparation method of polyurethane dip gloves mentioned in claim 3, the characteristic is that the PU paste also includes 1-10% mixed auxiliary materials;The mixed auxiliary materials are obtained by ball grinding of titanium dioxide, wood powder, PU resin and DMF.The mass ratio of titanium dioxide, wood powder, PU resin and DMF among the mixed auxiliary materials is 1.5:1.5:1:7.

5. According to the preparation method of polyurethane dipped gloves mentioned in claim 1, its characteristics are as follows: in step B, the gloves are impregnated with slurry at the sinking speed of 2cm ~ 4cm/s;The slurry tank temperature is normal temperature, and the temperature of gloves impregnated PU slurry is 40-50℃.

6. According to the preparation method of polyurethane rubber gloves mentioned in claim 1, the characteristic is that, in step C, the multi-stage water trough cleaning is the third-level water trough cleaning. The specific steps are as follows:

The first stage of cleaning in the water tank, the control temperature is 40 ~ 45℃, cleaning 60-80min;

Cleaning in the second stage of water tank, the control temperature is 57 ~ 63℃, cleaning 60-80min;

The third stage of the water tank cleaning, control temperature of 69 ~ 75℃, cleaning 60-70min.

7. According to the preparation method of polyurethane rubber gloves mentioned in claim 1, its characteristics are as follows:

The first stage of cleaning in the water tank, the control temperature is 40 ~ 45℃, cleaning 60-80min;

The second stage of cleaning in the tank, the control temperature is 50 ~ 55℃, cleaning 60-80min;

The third stage of the water tank cleaning, control temperature of 60 ~ 65℃, cleaning 60-80min;

Cleaning in the fourth water tank, the control temperature is 70 ~ 75℃, cleaning 60-70min.

8. According to the preparation method of polyurethane dipped gloves mentioned in claim 1, its feature is that, in step C, the waste liquid cleaned by multi-stage water tank is recovered by distillation column device for DMF.

9. According to the preparation method of polyurethane rubber gloves mentioned in claim 1, the characteristic is that, in step D, the drying temperature is 120 ~ 130℃ and the drying time is 20-40min.

Technical summary

The invention relates to A preparation method of polyurethane impregnated gloves, the specific steps are as follows: A.B. Impregnate the woven gloves with PU paste;C. Use multistage sink to clean the rubber soaked gloves after treatment in step B;D. Dry the rubber dipped gloves after cleaning in step C;E. Cooling, please.The production process of the invention is simple. The gloves are obtained with excellent gloss and flatness by one dip glue and multistage water washing.By adding mixed accessories, the wear resistance of gloves can be improved.The DMF content of the product was significantly reduced to 5ppm by using a multistage bath for cleaning PU gloves, and the DMF was recovered by distillation column for reuse, thus reducing production cost and environmental pollution.

JB-SUC PU半浸胶手套6