The inspection and testing of the performance of the softening agent of the film should be carried out from the following aspects:
(I) Solubility:
1. Immersion method: configure a 10% concentration of film solution, that is, the ratio of film to water is 1:9.
⑴Ordinary film:
(a) Opening at room temperature: soak in tap water at room temperature (25℃), first add a certain amount of water to the beaker, and then evenly and slowly sprinkle the film in, while gently shaking the beaker to make the film evenly dispersed in the water, respectively Record the dissolution in 1 hour, 7 hours, and 24 hours;
(b) Hot water boiling: soak in tap water at 45°C and 60°C and heat it in a water bath to keep it warm. Visually record the dissolution for 1 hour, 4 hours, and 6 hours, respectively.
⑵Instant-dissolving film: Sprinkle 10g of the instant film evenly into 90ml tap water, while gently shaking the beaker to disperse the film evenly in the water, soak it at room temperature for 60min, and observe the dissolution.
2. Stirring method: the opening concentration is 10%, that is, the ratio of the film to the water is 1:9. First add a certain amount of cold water to the beaker, sprinkle the film evenly and slowly at a stirring speed of about 300 rpm, and then slowly raise the temperature to 60 ℃, 80 ℃ (non-ionic film 75 ℃), and continue to stir for 60 minutes with an electric mixer (non-ionic film 75 ℃). Ion film 30min), record the dissolution. Note: During hot water immersion and stirring method, the higher temperature and longer time will cause more water to evaporate. After observing the solubility, if you use the film liquid as the working fluid, you should add water. Make it into a soft tablet solution with a concentration of 10%. The specific method can be pre-weighed before cutting, and after the operation is completed, the reduced weight of water can be added.
3. Description of the dissolution situation: Generally, it is described in text. When the number of films is large and the test items are more comprehensive, and the text description is more cumbersome, you can consider using a code to indicate it, but you must specify it first. The corresponding text and code are as follows: Code Dissolution 1 Basically no swelling 2 Small part swelling 3 Most swelling, a small amount of dissolution 4 Mostly dissolving 5 Mostly dissolving 6 Completely dissolving Remarks: If the film dissolves into a thick and uneven shape, use an underline Mark N.
4. Simple determination of solubility: Take about 1 gram of the opened soft flake solution and put it in 100 mL of water and stir to observe whether there is any flake particles. If there is, it means that the film is not completely dissolved, so continue to stir until it is completely dissolved.
(Ii) Diffusion:
1. Experimental method: Take about 5mL of 10% film and drop it into a 250mL beaker filled with water, and observe its natural diffusion in water. If it cannot diffuse naturally, stir with a glass rod for 2~3 seconds, and then observe Its spread in water.
Description of results: Use good, medium, and poor to describe, and if necessary, also use text to describe. It is better to diffuse naturally or to dissolve after a little stirring, while stirring is soluble to medium, while stirring is insoluble, and the diffusibility is poor.
(Iii) Stability:
1. Stability of working solution: Take 10% film and use tap water to prepare 5g/L (or configure as needed) emulsion, and observe its stability at room temperature for 2 hours, 4 hours, 8 hours, and 24 hours.
2. Alkali resistance stability: Take 10% of the film and use tap water to prepare 5g/L (or configure as needed) emulsion, adjust the pH to 9~10 with 40% caustic soda, and observe it for 2 hours, 4 hours, 8 hours, 24 Hours room temperature stability.
(Iv) Compatibility:
The test method is as shown in the table below, and observe its room temperature stability.
Initial configuration 2 hours 4 hours 8 hours 24 hours
10% film 40g/L+adhesive DME-751 10g/L
10% film 40g/L+fixing agent DMC-512 15g/L
10% film 40g/L+ paint blue 8304 0.1g/L
10% film 40g/L+adhesive DME-751 10g/L+fixing agent DMC-512 15g/L+paint 8304 0.1g/L
10% film 40g/L+VBL 0.2g/L
10% film 40g/L +WS-135 8g/L
Note: The above concentration is the actual concentration of each component in the configured working fluid.
(V) Application performance:
1. Prescription and process conditions:
⑴Dipping method (knitted cloth or yarn): 10% soft sheet (owf) X% working fluid pH adjusted according to needs) bath ratio 1:10~15 room temperature 0~40℃ immersion 0~30min→dehydration/rolling→drying (100℃)→baking (C, R, L 150℃×30~60', T, T/C, T/R 170~180℃×30', nylon, nylon spandex 150~160℃×30', Acrylic 130 ℃×30').
⑵Padding method (pure cotton woven fabric): 10% soft sheet Y g/L dry cloth→padding→100℃ drying→baking (same as the dipping method).
2. Effect representation:
⑴Hand feeling: The hand touch method is used to evaluate the hand feeling effect of each softener finishing sample. The hand feeling of softness, elasticity, slippery, cool and fullness can be evaluated separately. It must be evaluated by more than five people, and then comprehensively sorted;
⑵Whiteness: select bleached or whitened fabric to test, visually or use a computer color measuring instrument or equivalent instrument to determine the whiteness value of each finishing sample, and investigate the effect of softener on the whiteness of the fabric;
⑶ Discoloration: visually or using a computer color measuring instrument or equivalent instrument to determine the color characteristics of each finished sample, and investigate the effect of softener on the shade of fabric;
⑷ Color fall: visually compare the dye concentration in the dipping/padding working solution. The higher the concentration, the worse the film falling performance; the lower the dye concentration, the lighter the film falling and the better the film falling performance.
⑸ Water absorption/hydrophilicity:
Method ⑴: Use the DM/CZ 05-030 method to measure the capillary effect of the cloth sample after finishing the film;
Method ⑵: Use the DM/CZ 05-060 method to measure the hydrophilicity of the fabric.