How does PP/pulp composite spunlace achieve efficient cleaning through friction?

In the complex environment of industrial production, various equipment and working surfaces are easily contaminated with pollutants such as oil, dust, and debris. If these pollutants are not cleaned in time, they will not only affect the normal operation of the equipment, reduce production efficiency, but also may cause safety hazards. Industrial cleaning wipes, as a convenient and efficient cleaning tool, play an important role in the field of industrial cleaning. The core material, PP/pulp composite spunlace, has become the key to achieving efficient cleaning with its unique physical properties, especially the physical friction during the wiping process.

PP/pulp composite spunlace is made of polypropylene (PP) fiber and pulp fiber through a spunlace process. PP fiber, with its strength and tensile resistance, builds the basic skeleton of the composite spunlace fabric. This high-strength property enables the cloth to maintain a stable shape when subjected to external forces during the wiping process, and will not easily deform or break. When the industrial cleaning wipes come into contact with the surface of the contaminated object and apply wiping force, the stable support provided by the PP fiber ensures that the cloth can fit the surface of the object tightly and forcefully, creating good conditions for the subsequent physical friction process.

As the wiping action progresses, the fibers on the surface of the PP/pulp composite spunlace cloth begin to directly contact the contaminants and produce friction. At the microscopic level, there are various adhesion forces between the contaminants and the surface of the object, such as van der Waals force, electrostatic force, and chemical bonding force, which make the contaminants firmly attached to the surface of the object. During the friction process, the fibers on the surface of the composite spunlace cloth can effectively destroy these adhesion forces by virtue of their irregular surface morphology and the shear force generated by relative movement. The rigidity and toughness of PP fibers enable the fibers to act on the contaminants with a certain force during friction, gradually weakening the bonding strength between the contaminants and the surface of the object. Although the pulp fiber is relatively soft in texture, it can also participate in the friction process with the synergistic support of PP fibers, increase the contact area with the contaminants, and further enhance the friction effect.

In actual industrial cleaning scenarios, taking a machining workshop as an example, a mixture of cutting fluid, metal debris and oil often remains on the surface of metal parts. When using industrial cleaning wipes containing PP/pulp composite spunlace cloth for wiping, the fibers on the surface of the cloth first come into contact with these contaminants. The high strength of PP fibers ensures that the cloth will not be scratched by metal debris during the wiping process, and the friction action is continuously and stably performed. Under the friction between the fibers and the contaminants, the liquid film of cutting fluid and oil is destroyed, and the adhesion between metal debris and the surface of the parts is broken, and gradually detaches from the surface of the object. Pulp fibers play an auxiliary role in this process. Their soft texture can penetrate into the fine grooves and pores on the surface of the parts, further bringing out the residual contaminants.

The physical friction of PP/pulp composite spunlace cloth can not only detach contaminants from the surface of the object, but also effectively prevent contaminants from reattaching during the wiping process. When the contaminants detach from the surface of the object under the action of friction, they will be suspended in the tiny space between the cleaning wipes and the surface of the object. At this time, pulp fibers, due to their rich microporous structure and good water absorption, can quickly absorb surrounding liquid pollutants, including oil and cutting fluids that are detached by friction. These absorbed liquids form a "separation layer" inside the pulp fibers, making it difficult for the detached pollutants to return to the surface of the object again. At the same time, the stable structure formed by PP fibers ensures that the cloth can still maintain a certain shape and strength after absorbing a large amount of pollutants, and continue to perform effective wiping operations, thereby achieving thorough cleaning of the surface of the object.

From the perspective of material structure, PP fibers and pulp fibers are entangled with each other under the action of the spunlace process to form a complex and orderly network structure. This structure has unique advantages in the physical friction cleaning process. When some fibers are subjected to large external forces during the friction process, other fibers can share the stress through the network structure to avoid the breakage of a single fiber due to excessive force, thereby ensuring the overall wiping performance of the cloth. Moreover, as the wiping proceeds, the fiber network structure can be continuously adjusted and reorganized, so that the cloth can always contact and generate friction with the surface of the object in the best state, continuously improving the cleaning effect.