As a product with liquid absorption as its main function, toddler pants attaches great importance to liquid absorption time and permeability. If the suction does not achieve the desired effect, the toddler pants will leave urine, leading to bacterial growth and a series of harmful effects on the user. For products made of silk, a lot of research and analysis is required due to imperfect technology. To this end, the following is a brief analysis of the liquid permeability of the product.

Silk toddler pants contact angle test

The silk fiber and ES fiber in the silk/ES non-woven fabric are not highly hydrophilic, and the surface of the silk fiber is damaged and fluffed during the carding and spunlace process. When the droplets fall on the silk non-woven fabric, the droplets form water droplets on the surface of the cloth and cannot penetrate the non-woven fabric. After testing, the contact angle reaches 131.1 degrees, and the silk/ES non-woven fabric cannot be directly used for the toddler pants surface layer, and requires hydrophilic finishing.

Silk toddler pants hydrophilic finishing scheme

The relationship between surface density and reverse osmosis amount shows that the larger the surface density of silk/ES non-woven fabric, the greater the reverse osmosis amount. The hydrophilically-finished silk fiber has strong water absorption, and more water is transferred to the absorbent paper during the test. Therefore, with the increase of the amount of silk fiber, the reverse osmosis property increases.

It can be seen that when the number of spunlace channels is less than 5, the more the number of spunlace channels, the greater the reverse osmosis of the nonwoven fabric. As the number of spunlace increased, the thickness of the nonwoven decreased, and the entanglement between the fibers did not reach the level of hindering the reverse osmosis of the liquid. When the number of spunlace channels is greater than 5, the more spunlace channels, the smaller the amount of reverse osmosis, because the increase of the number of spunlace channels increases the tightness of fiber entanglement, thus preventing the reverse osmosis of liquid. Experiments show that the number of spunlace channels has a critical value on the amount of reverse osmosis under a certain areal density of non-woven fabrics. When it is less than the critical value, the amount of reverse osmosis increases with the increase of the number of spunlace channels, and when it is greater than the critical value, the amount of reverse osmosis decreases with the increase of the number of spunlace channels.

By analyzing the relationship between the oiling rate and the reverse osmosis amount, it can be seen that the greater the oiling rate, the greater the reverse osmosis amount. The oil rate will affect the hydrophilic agent on the fiber. The higher it is, the more water molecules will be adsorbed on the surface of the fiber, the greater the surface tension of the non-woven material, and the easier the lower liquid will penetrate into the surface.

It can be seen that with the increase of the number of spunlaces, the thickness of the silk toddler pants with the same areal density reduces the air permeability, which decreases with the increase of the surface density and the number of spunlaces; the reverse osmosis and water absorption increase with the increase of the oil rate and increase; with the increase of oil rate, the water penetration time decreases; the spunlace number of non-woven fabrics with a certain surface density has a critical value on the amount of reverse osmosis. When it is less than the critical value, the amount of reverse osmosis increases with the increase of the number of spunlaces, and when it is greater than the critical value, the amount of reverse osmosis decreases with the increase of the number of spunlaces.