Masks, diapers, wet wipes... it turns out that their core is the same "plastic cloth"
Disposable items that can be seen everywhere in daily life, such as medical masks, baby diapers, and daily wet wipes, may seem to have vastly different uses - one for protection and breathability, one for water absorption and locking, and one for cleaning and wiping. The texture and function are completely different, but many people do not know that their core material is actually the same thing - polypropylene (PP) non-woven fabric, which is commonly referred to as "plastic cloth" in the popular sense.
Many people may wonder: non-woven fabric feels soft and breathable to the touch, without the rigid and non breathable texture of ordinary plastic film. How could it be made of plastic material? In fact, this is a double misunderstanding of the public towards "plastic" and "non-woven fabric". The plastic cloth in our daily impression is a dense and non porous plastic film that is waterproof, non breathable, and skin friendly; The polypropylene non-woven fabric used for masks, diapers, and wet wipes is a plastic fiber structure reshaped through special processes. Essentially, it is modified from plastic and has the soft, breathable, and skin friendly properties that traditional plastics do not have, making it the core substrate of disposable sanitary products.
Same raw materials, different processes create countless functions
The core substrate of these daily necessities is polypropylene particles, with differences only in molding process, fiber thickness, and fabric structure, ultimately presenting completely different usage effects and adapting to different scene requirements.
1. Medical mask: melt blown+spunbond PP non-woven fabric, achieving dual directional balance of protection and breathability
The three-layer structure (SMS structure) of ordinary medical masks consists of two layers of spunbond polypropylene non-woven fabric on the inside and outside, and a core filter layer of meltblown polypropylene non-woven fabric in the middle. The non-woven fibers produced by spunbond technology are thicker, more compact in structure, stronger in toughness, and resistant to pulling, responsible for supporting the overall shape of the mask while isolating external large particles of dust and droplets; The melt blown process stretches polypropylene melt into ultrafine fibers, which interweave to form a fine porous structure with extremely small pores. It can efficiently block bacteria and aerosols, while retaining small breathable channels to prevent sweating. The combination of two processes enables the plastic substrate to achieve the core function of "breathable and non polluting".
2. Diapers: Multi layer PP non-woven fabric, supporting the core logic of water absorption and water locking
The surface skin friendly layer, flow guiding layer, and bottom leak proof layer of baby diapers are still made of polypropylene nonwoven fabric, with only functional modification treatment. The surface is reinforced with hot air PP non-woven fabric, with fluffy and soft fibers that are skin friendly and non irritating. It can quickly penetrate urine and prevent reverse osmosis; The middle diversion layer relies on a special fiber structure to quickly disperse liquids and avoid local water accumulation; The bottom waterproof non-woven fabric has undergone hydrophobic modification, which is both lightweight and breathable, and can lock in moisture and prevent side leakage. Seemingly soft and absorbent diapers rely entirely on modified plastic fiber structures to achieve water absorption, water locking, and leak prevention functions.
3. Wet wipes: Water jet PP non-woven fabric, soft and suitable for cleaning scenarios
The vast majority of conventional wet wipes on the market are made of water jet polypropylene non-woven fabric. By using high-pressure water jet technology to entangle polypropylene fibers with each other, the fabric surface is smooth and delicate, without shedding fibers, with sufficient toughness, and is not easily damaged after soaking. Compared to pure cotton fabrics, PP spunlace non-woven fabric has lower cost, better antibacterial properties, and is less prone to bacterial growth. It also has a slight hydrophobic and hydrophilic property, which can absorb stains, retain cleaning solution, and leave less fiber residue after wiping. It is perfectly suitable for daily cleaning and skin care scenarios. A few high-end wet wipes will use biodegradable polylactic acid material, but mainstream civilian wet wipes still use PP non-woven fabric as the core.
Why is it polypropylene? Unlock the advantages of universal plastic substrates
Polypropylene can monopolize the disposable hygiene product market and become the universal core material for masks, diapers, and wet wipes. The core is that it has multiple inherent advantages that are suitable for hygiene scenarios and cannot be replaced.
Firstly, it is safe, non-toxic, and highly stable. Food grade and medical grade polypropylene materials have stable chemical properties, do not release harmful substances at room temperature, are acid and alkali resistant, corrosion-resistant, skin friendly and non irritating, and will not cause allergies or irritation when in contact with human skin, mouth and nose. They meet the requirements of high safety standard scenarios such as mother and baby care and medical use.
Secondly, it has strong plasticity and customizable functions. By adjusting different processes such as spunbond, meltblown, water jet, and hot air, combined with hydrophilic, hydrophobic, and antibacterial modification treatments, polypropylene non-woven fabric can be freely switched in properties: it can be used as a dense protective layer for masks, a hydrophilic permeable layer for diapers, and a soft cleaning layer for wet wipes, adapting to multiple functions.
Finally, it is lightweight, efficient, and cost-effective. Polypropylene material is lightweight, does not require complex processing after molding, has high production efficiency, low cost, and perfectly adapts to the consumption properties of disposable products. At the same time, the fiber structure is breathable and hydrophobic, solving the pain points of traditional plastics that are not breathable and prone to stuffiness, while balancing practicality and user experience.
Common cognitive misconception that disposable plastic products are not "useless"
Many people, upon learning that these daily necessities are made of plastic, may develop a sense of resistance, thinking that "plastic is unsafe when it comes into contact with the skin, mouth, and nose" or that "disposable non-woven fabric is inferior plastic". However, these are actually misconceptions.
The masks, diapers, and wet wipes produced by legitimate manufacturers are made of polypropylene non-woven fabric, which is a food and medical grade raw material. After sterilization and dust removal treatment, there are no fluorescent agents or harmful additives, and their compliant use is completely harmless to the human body. And it is made into a disposable product precisely because of its hygienic material, low bacterial growth, effective prevention of cross infection, and adaptability to essential scenarios such as protection and mother and baby cleaning.
The only issue that needs to be taken seriously is environmental protection. Polypropylene is a non degradable plastic that can cause environmental burden if discarded after one-time use. This is also the reason why polylactic acid biodegradable wipes and biodegradable protective equipment are gradually being introduced on the market today. However, due to cost and performance limitations, polypropylene non-woven fabric is still the most mainstream and practical core material at present.
Conclusion
From protective masks to mother and baby diapers, to daily cleaning wipes, seemingly unrelated daily necessities are essentially "versatile forms" of polypropylene plastic material. The cleverness of technology lies in its process innovation, which allows ordinary plastic materials to break through their limitations, transforming from rigid plastic films into soft, safe, and multifunctional materials for people's livelihoods, silently guarding the hygiene and convenience of daily life. By understanding this, we can not only rationally view the materials of such daily necessities, but also establish an environmental awareness of green use and reasonable disposal.
Dongguan Liansheng Non woven Technology Co., Ltd. was established in May 2020. It is a large-scale non-woven fabric production enterprise integrating research and development, production, and sales. It can produce various colors of PP spunbond non-woven fabrics with a width of less than 3.2 meters from 9 grams to 300 grams.