Method for preparing oil absorption cotton

Abstract

The invention discloses a method for preparing oil absorption cotton. The oil absorption cotton is made of fibers made of polypropylene through melt-blowing and non-woven fabrics through special treatment. The method comprises the steps of conducting stretching action on sprayed cellosilk with air flow sprayed at the high pressure, so that compact micrometer cellosilk is formed; arranging an ultrasonic generator on a spray nozzle of a pressure squeezing device so that liquid raw materials can be pushed to be sprayed out of spray orifices in the spray nozzle. The oil absorption cotton prepared through the method is integrally formed, better fastness and toughness are achieved, no delamination is generated in the using process, and the oil absorption cotton is not prone to hair slip or pilling, easy to use and environmentally friendly.

Description

technical field [0001] The invention relates to a method for preparing an oil-absorbing material, in particular to a method for preparing an oil-absorbing cotton. Background technique [0002] Oil-absorbing cotton is a kind of fiber and non-woven fabric made of inert modified polypropylene melt-blown after special treatment, which can effectively absorb liquid and retain it. Adsorption products are all wrapped in polypropylene fibers or non-woven fabrics sewn with threads and treated with surface-activating agents. The outer fabric is extremely tough and durable, and has strong adsorption due to strong capillary absorption, thus Absorb the leaked liquid and flow to the oil-absorbing cotton, which effectively prevents the spread of the leak. The product can be reused after being twisted and squeezed, and 72%-90% of the leaked liquid can be recovered. The advantages of this material are flame retardant, no dust generation, no storage limit time, etc. In the prior art, the pr...

AI Technical Summary

Problems solved by technology

However, turning fibers into non-woven fabrics requires a series of processing processes. Separating fiber forming from the forming process of non-woven fabrics will increase production costs and lead to unnecessary material transfer costs.

In addition, electrospinning requires thousands of volts or even tens of thousands of volts of DC high voltage, which requires high conductivity of the solution. The existing electrospinning pilot equipment can only spin at room temperature, which greatly limits its industrial application.

Melt-blown technology is the most commercialized and largest-scale method of manufacturing ultra-fine fiber non-woven fabrics. However, the diameter of existing melt-blown fibers is mostly between 2 and 4 μm, and there are still certain difficulties in preparing nano-scale fibers. This is mainly because: the pure melt has a high viscosity, and it is difficult to stretch / flap the jet; experimental observations show that the temperature of the jet has dropped by more than 200°C when it leaves the die 2cm away, and the jet solidifies rapidly

Using melt-blown equipment for polymer solution jet spinning, nano-scale fiber non-woven fabrics can be obtained, but the fibers are smooth and have no hole structure

The introduction of the porous structure can be achieved by adding incompatible inorganic nanoparticles or polymers to the melt-blown polymer masterbatch, and then selectively removing the pores by solvent dissolution or calcination; but this method will lead to a significant increase in the mechanical properties of the fiber Decrease and there is the problem of incomplete dissolution, and the fiber diameter is also at the micron level

It is reported in the literature that porous fibers are prepared by receiving the spinning jet with a non-solvent bath, but the fiber diameter is between 3 and 5 μm or even thicker; this is because if the fiber diameter reaches the nanometer level, the solvent volatilization rate is too fast to achieve Phase separation by solvent-non-solvent exchange results in only dense fibers

In addition, the oil-absorbing cotton produced by the traditional process is formed by superimposing multi-layer spinning, which is easy to be dispersed in layers during use, and pilling and hair loss