The composition of the fabric is closely related to the washing method. Since I am currently mainly engaged in the woolen business, when customers come to ask about the washing method, I always recommend dry cleaning because the shrinkage of wool Due to the velvety nature, it is generally recommended that dry cleaning is safer than machine washing. Below, I have summarized some knowledge points about dry cleaning, hoping to be helpful to you in your business communications with customers.
Definition and principle of dry cleaning method
Dry cleaning method commonly uses organic solvents to dissolve and rinse for decontamination. Since the French first used turpentine to dry-clean clothes in 1840, to the use of efficient dry cleaning agents today, dry cleaning has become ecological and mature, and exists because of its special effect in removing oil stains.
The main difference between dry cleaning and water cleaning is that in dry cleaning, the fiber does not expand much and the channel remains unchanged. , the dissolution of oil stains makes the dirt particles smaller and gradually disappears, while diffusion and removal are more efficient, but toxic volatilization, flammability and explosiveness are its fatal flaws. Water washing is just the opposite. The fibers absorb moisture and expand, the channels become smaller, and the oil particles become smaller. , the diffusion speed is basically unchanged, and it is relatively safe and convenient to use.
What are the dry cleaning agents
Tetrachlorethylene: It has strong dissolving power and strong ability to remove oil, fat and other dirt. It does not cause discoloration, color transfer, deformation or damage to fabrics. It has stable performance and high recovery rate. However, a large number of medical studies have proven that its toxic and side effects can cause allergic dermatitis, endocrine dysfunction, damage to the liver and kidneys, and even cause cancer.
Petroleum solvent: a hydrocarbon dry cleaning agent, its modified hydrocarbon solvent carbon bromide Solvents have almost zero environmental pollution, but they will spontaneously ignite and may explode above 200 degrees, so there are restrictions.
Silicon oil dry cleaning agent: its use is growing rapidly in the United States and Europe, but it has just started in Asia. It is safer than petroleum solvents and is mainly used for Skin and hair care cleanser.
Dry cleaning method
Dry cleaning The process includes three steps: washing, deliquidation, drying and cooling.
Washing is the use of dry cleaning agents to dissolve and remove dirt from the clothes placed in the drum of the dry cleaning machine. Fluid flushing decontamination process.
Deliquidation is the centrifugal drying of washed clothes to remove the solvent to the maximum extent process. This process determines the solvent recovery rate.
Drying is a process in which high-heat airflow evaporates, dries, cools and recovers the dry cleaning agent in the clothes. . This process determines the residual rate and recovery rate of the dry cleaning agent, which determines the safety and cleanliness of dry cleaning.
At present, dry cleaning is still mainly about removing oily dirt without losing shape. The dirt removal ability is poor; the washing effect on light-colored cashmere fabrics, silk and worsted wool is also poor.
