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What Are the Raw Materials for Sanitary Pads? An Expert Guide to the 7 Core Components for 2025

Dez 8, 2025

Abstract

An examination of the disposable sanitary pad reveals a sophisticated, multi-layered composite article, engineered for fluid absorption, containment, and user comfort. The efficacy and safety of these products are fundamentally determined by their constituent components. This analysis delineates the primary raw materials that constitute the modern sanitary napkin. It explores the functional properties of the topsheet, typically composed of non-woven fabrics like polypropylene or natural fibers such as cotton; the acquisition distribution layer, which facilitates rapid fluid transfer; and the absorbent core, a matrix of cellulosic fluff pulp and superabsorbent polymers (SAP). Further, it details the composition of the impermeable backsheet, the specialized adhesives used for construction and placement, and the protective release paper and wrapper. Understanding what are the raw materials for sanitary pads provides critical insight into how material science innovations are addressing performance demands while navigating the growing imperative for environmental sustainability and biocompatibility in feminine hygiene products.

Key Takeaways

  • The topsheet, your skin’s first contact, is made from non-woven synthetics or natural fibers like cotton.
  • An Acquisition Distribution Layer (ADL) rapidly pulls fluid away from the surface to keep you feeling dry.
  • The absorbent core uses fluff pulp and Superabsorbent Polymer (SAP) to lock away large amounts of fluid.
  • Material choice directly impacts pad performance, comfort, breathability, and overall user experience.
  • Sustainable raw materials for sanitary pads like organic cotton and bamboo are gaining market traction.
  • Adhesives are specialized hot-melt formulas designed for secure placement and layer bonding.
  • A polyethylene backsheet prevents leaks, with breathable options offering enhanced comfort.

Table of Contents

Deconstructing the Modern Sanitary Pad: A Material Science Perspective

To hold a sanitary pad in your hand is to hold a small, quiet marvel of material engineering. It appears simple, almost mundane, yet its construction is the result of decades of innovation in polymer science, non-woven technology, and fluid dynamics. For many, it is an object of profound personal importance, a tool that facilitates participation in public life, work, and education without the hindrance of menstrual flow. But what is it, truly? To understand its function, its potential for comfort or irritation, and its environmental footprint, we must first deconstruct it. We must ask the fundamental question: what are the raw materials for sanitary pads?

The answer is not a single substance but a carefully orchestrated assembly of specialized components, each with a distinct role. Imagine the pad not as a single entity, but as a team of materials working in concert. From the soft, permeable topsheet that rests against the skin to the powerful absorbent core that forms its heart, and the impermeable backsheet that ensures containment, every layer is a deliberate choice. These choices, made by leading OEM/ODM hygiene product manufacturers, dictate a pad’s performance characteristics: how quickly it absorbs, how much it can hold, how dry it feels against the skin, and how well it conforms to the body.

This exploration will journey through the intricate layers of a sanitary napkin, examining each raw material in detail. We will investigate the synthetic polymers and natural fibers that compete for a place in the product’s design. We will look at the almost magical properties of superabsorbent polymers and the simple yet vital function of adhesives and release papers. This journey is not merely academic; it is an exercise in developing a deeper literacy about the products we rely on. For consumers, this knowledge empowers informed choices about personal health and environmental values. For brand owners and product developers, a granular understanding of what are the raw materials for sanitary pads is the very foundation of innovation, quality control, and market success in the ever-evolving landscape of feminine hygiene.

Component 1: The Topsheet, The First Point of Contact

The topsheet is the gateway to the sanitary pad. It is the only layer designed to be in direct, prolonged contact with some of the most sensitive skin on the body. Its dual mandate is therefore a challenging one: it must be exceptionally soft and comfortable to prevent irritation, while also performing the technical function of rapidly wicking fluid away from the body and into the subsequent layers, preventing any feeling of wetness. The selection of raw materials for this layer is a critical decision that profoundly impacts the user’s perception of comfort and quality.

Common Materials and Their Properties

The materials used for topsheets fall broadly into two categories: synthetic non-wovens and natural fibers.

  • Synthetic Non-Woven Fabrics: These are the most common materials used in mass-market sanitary pads. They are engineered fabrics made from plastic polymers, primarily polypropylene (PP) or polyethylene (PE). They are not woven or knitted like traditional textiles. Instead, the polymer is melted and then spun or blown into a web of fine filaments.
    • Spunbond: In this process, melted polymer is extruded through spinnerets to form continuous filaments, which are then laid down in a web and bonded together using heat and pressure. Spunbond fabrics are strong and stable.
    • Meltblown: This method produces much finer fibers, resulting in a fabric with excellent softness and fluid-handling properties, though with less strength than spunbond.
    • Often, a composite structure, such as SMS (Spunbond-Meltblown-Spunbond), is used to combine the strength of spunbond layers with the softness and barrier properties of a meltblown layer.
  • Perforated Films: Some topsheets, often marketed for a “clean and dry” feel, are made from a thin sheet of polyethylene that has been perforated with funnel-shaped holes. The design allows liquid to pass through quickly but makes it difficult for it to return to the surface, a concept known as one-way permeability. While effective at fluid management, some users find these plastic films less soft and breathable than non-woven fabrics.
  • Natural Fibers: In response to consumer demand for more “natural” and hypoallergenic options, topsheets made from natural fibers have become increasingly popular, particularly in the premium and eco-conscious market segments.
    • Algodão orgânico: Cotton is renowned for its softness, breathability, and absorbency. When certified organic, it is grown without the use of synthetic pesticides or fertilizers, which is a significant selling point for consumers concerned about chemical exposure. Its fibrous nature is inherently gentle on the skin.
    • Bamboo: Bamboo fiber is another rapidly growing option. It is often touted for its sustainability, as bamboo is a fast-growing grass that requires minimal resources. Bamboo-based non-wovens are exceptionally soft, breathable, and are sometimes claimed to have natural antibacterial properties (Asim et al., 2021).

Comparison of Topsheet Materials

The choice of topsheet material involves a trade-off between performance, cost, and consumer perception. Synthetic non-wovens are cost-effective and highly efficient at fluid management, while natural fibers offer superior softness and a more sustainable profile at a higher price point.

Material Primary Component Key Advantages Key Considerations
Standard Non-Woven Polypropylene (PP) Excellent fluid wicking, cost-effective, durable Can feel less soft, plastic-based
Perforated Film Polyethylene (PE) Superior one-way dryness, clean feel Not breathable, can feel “plasticky”
Algodão orgânico Cellulose (from cotton plant) Exceptionally soft, breathable, hypoallergenic, renewable Higher cost, can hold moisture at the surface
Bamboo Non-Woven Cellulose (from bamboo pulp) Very soft, breathable, sustainable narrative Higher cost, processing can be chemical-intensive

Component 2: The Acquisition Distribution Layer (ADL), The Unsung Hero of Dryness

Nestled just beneath the topsheet lies a component that is often invisible to the consumer but is pivotal to the performance of a modern sanitary pad: the Acquisition Distribution Layer, or ADL. Its name perfectly describes its function. It acquires fluid rapidly from the topsheet and distributes it evenly across the length and width of the absorbent core below. Without the ADL, menstrual fluid would tend to pool in one spot, overwhelming the absorbent core locally and leading to a higher risk of leaks and a persistent feeling of wetness on the surface.

Think of the ADL as a traffic manager for fluid. When a gush of liquid passes through the topsheet, the ADL’s job is to prevent a “traffic jam.” It quickly pulls the fluid downward and spreads it out, increasing the surface area over which the main absorbent core can work. This rapid de-saturation of the topsheet is what creates the “instantly dry” feeling that many brands advertise. It acts as a buffer, temporarily holding the fluid before it is fully absorbed by the core, which prevents “rewet,” the unwelcome phenomenon where fluid returns to the surface under body pressure.

What is the ADL Made Of?

The materials used for the ADL must have a specific structure: high loft (meaning they are thick and bulky, but not dense), large pores, and excellent wicking capabilities. They are not designed to be highly absorbent themselves; their primary role is fluid transport. Common raw materials for this sanitary pad component include:

  • Thermally Bonded Non-Wovens: These are often made from a blend of fibers, such as polyethylene (PE) and polypropylene (PP) or polyester (PET). The fibers are bonded together using heat, which creates a porous and resilient structure perfect for fluid distribution.
  • Air-laid Paper: This material is made from wood pulp that is dispersed in the air and then collected on a screen to form a sheet, which is then bonded with a latex binder. The resulting fabric is softer and more porous than regular paper, allowing it to quickly channel liquid.
  • Apertured Films: Similar in concept to the perforated film topsheets, these are plastic films with specifically designed holes or patterns that encourage fluid to spread laterally.

The presence and quality of an ADL is a key differentiator between low-cost and premium sanitary pads. Its inclusion is a testament to the sophisticated understanding of fluid dynamics that goes into designing a high-performance menstrual product. It is a critical part of the system that ensures comfort and security, working silently beneath the surface.

Component 3: The Absorbent Core, The Heart of Performance

If the topsheet is the gateway, the absorbent core is the destination. It is the engine of the sanitary pad, the component responsible for the primary function of locking away menstrual fluid to ensure leak-proof security for hours. The evolution of the absorbent core is perhaps the single most significant story in the history of modern menstrual products. What was once a simple, bulky layer of cotton or crude cellulose has transformed into a high-tech composite material. Understanding what are the raw materials for sanitary pads truly comes to a head in this central layer.

The modern absorbent core is almost always a composite blend of two key materials: fluff pulp and superabsorbent polymer (SAP). The genius lies not just in the materials themselves, but in the precise ratio and integration of the two.

Fluff Pulp: The Foundation

Fluff pulp is a type of chemical pulp made from softwood trees, like pine. The raw wood undergoes a pulping process to separate the cellulose fibers. The resulting material is bright white, soft, and naturally absorbent. In the context of a sanitary pad, this fluff pulp forms a fibrous matrix or scaffold.

Imagine a sponge. The cellulose fibers of the fluff pulp create a network of tiny spaces. When fluid enters this network, it is held in these spaces through a physical process called capillary action. Fluff pulp is excellent at absorbing fluid quickly and provides the soft, cushiony structure of the pad. However, its main limitation is its capacity and retention. Under pressure—for instance, when the wearer sits down—a core made only of fluff pulp would easily release the liquid it holds, leading to leaks and a wet feeling. This is where its partner, SAP, becomes indispensable. Some manufacturers, like those listed on sourcing platforms, specify the origin of their pulp, such as “Georgia Pacific USA Pulp,” to signify quality (Jieyacn.com, n.d.).

Superabsorbent Polymer (SAP): The Powerhouse

Superabsorbent polymer is a true marvel of chemical engineering. It is typically a sodium salt of polyacrylic acid, a long chain of repeating chemical units. It is supplied as a dry, white, sugar-like powder. When this powder comes into contact with an aqueous fluid like menstrual blood, it performs an almost magical feat: it can absorb and retain up to several hundred times its own weight in liquid, forming a stable gel.

The process is driven by osmosis. The concentration of sodium ions inside the polymer network is much higher than in the fluid outside. Water rushes into the polymer particles to try to equalize this concentration, causing the long polymer chains to uncoil and the particle to swell dramatically, trapping the water within its molecular structure.

Unlike fluff pulp, which holds liquid physically, SAP holds it chemically within a gel. This gel is incredibly stable, even under pressure. This means that once the fluid is locked away by the SAP, it is not easily squeezed out. This property is what allows modern pads to be so thin yet so incredibly absorbent and secure. The amount of SAP used is a key factor in a pad’s performance, with overnight or heavy-flow pads containing a higher concentration than pads for light flow.

The Core Composition: A Balancing Act

The art of creating an effective absorbent core lies in finding the perfect balance between fluff pulp and SAP.

  • Pulp-Heavy Cores: These are generally thicker and feel more cushioned. The pulp provides rapid initial absorption, while a smaller amount of SAP provides the retention. These are often found in lower-cost or “maxi” style pads.
  • SAP-Heavy Cores: These allow for the creation of “ultra-thin” pads. With less bulky pulp and more powerful SAP, the pad can be incredibly discreet while still offering high levels of protection. The challenge here is ensuring the fluid is distributed quickly enough to reach all the SAP particles, which is another reason the ADL is so important.

Comparison of Absorbent Core Components

Component Material Type Primary Function Key Advantage Key Limitation
Pasta de papel Natural Cellulose Fiber Rapid fluid acquisition, structural integrity, softness Provides cushion and quick wicking Low retention under pressure, bulky
SAP Synthetic Polymer (Sodium Polyacrylate) High-capacity fluid retention, gel formation Locks fluid away chemically, allows for thin designs Slower absorption rate than pulp, higher cost

The absorbent core is the technical heart of the pad, where the raw materials work in a synergistic partnership to deliver the peace of mind and physical freedom that users depend on.

Component 4: The Backsheet, The Protective Barrier

The backsheet is the final layer of the sanitary pad, the one that faces the underwear. Its function is straightforward but non-negotiable: it must be completely impermeable to liquid. It is the ultimate safeguard, the final line of defense that prevents menstrual fluid from staining clothing. While its primary role is containment, the material choice for the backsheet also has a major impact on another crucial aspect of comfort: breathability.

The Standard: Polyethylene (PE) Film

For many years, the standard raw material for backsheets has been a thin film of plastic, almost always polyethylene (PE). This material is cost-effective, durable, and an excellent moisture barrier, making it an obvious choice for preventing leaks. It is the same type of familiar, flexible plastic used in countless everyday applications, from plastic bags to food wrap. This non-breathable plastic film provides absolute security against leakage. However, it also traps moisture and heat, which can lead to a feeling of stuffiness, humidity, and discomfort, especially in warm weather or during physical activity. This lack of air circulation can contribute to skin irritation for some users.

The Innovation: Breathable Backsheets

Recognizing the comfort limitations of standard PE film, manufacturers developed “breathable” backsheets. This might sound like a contradiction—how can a layer be both waterproof and breathable? The solution lies in sophisticated material science.

A breathable backsheet is typically a composite material. It starts with a polyethylene film that has been blended with a filler, usually calcium carbonate (chalk). After the film is extruded, it is stretched. This stretching process causes microscopic pores to form around the calcium carbonate particles. These micropores are large enough to allow water vapor (gas) molecules to escape, but they are too small for liquid water droplets to pass through.

The result is a backsheet that still prevents leaks but allows air and water vapor to circulate. This significantly reduces the buildup of heat and humidity, leading to a much cooler, drier, and more comfortable experience for the wearer. The outside of this breathable film is often laminated with a soft, cloth-like non-woven layer to improve the feel and quietness of the pad during movement. Today, breathable backsheets are a standard feature in most mid-tier to premium sanitary pads, representing a significant advancement in user comfort.

Component 5: The Adhesives, Holding It All Together

A sanitary pad raw material is a laminated structure, a sandwich of multiple layers. What holds all these layers together? And what keeps the pad securely in place in the underwear? The answer is a category of raw materials that work entirely behind the scenes: adhesives. The glues used in sanitary pads are highly specialized and must be chosen with care, as they need to be effective without compromising the safety or comfort of the product.

There are generally two types of adhesives used in the construction of a sanitary pad:

Construction Adhesive

This is the glue used internally to bond the different layers together—for example, to attach the absorbent core to the backsheet and the topsheet to the core. It is crucial that this adhesive maintains a strong bond throughout the product’s use, even when saturated with fluid. It also needs to be flexible enough to allow the pad to conform to the body’s movements without the layers separating.

Positioning Adhesive

This is the adhesive that consumers interact with directly. It is applied to the backsheet in strips and is what allows the pad to be stuck to the inside of the underwear. For pads with wings, adhesive is also applied to the wings for extra security. This positioning adhesive needs to be strong enough to prevent the pad from shifting, bunching, or detaching during wear, yet it must not be so aggressive that it leaves a sticky residue on the fabric after removal or damages delicate lingerie.

The Chemistry of Pad Adhesives

The vast majority of adhesives used in sanitary pads and other disposable hygiene products are hot-melt adhesives. These are thermoplastic materials that are solid at room temperature, become liquid when heated for application in the factory, and then rapidly re-solidify upon cooling to form a bond.

They are typically based on synthetic rubbers, such as Styrene-Butadiene-Styrene (SBS) or Styrene-Isoprene-Styrene (SIS) block copolymers. These are blended with other components:

  • Tackifiers: These are resins that increase the “stickiness” or tack of the adhesive.
  • Waxes and Oils: These are used to modify the viscosity (flow characteristics) of the hot adhesive and control its flexibility and setting time once applied.

A primary concern for these adhesives is safety. They must be non-toxic, non-irritating, and free from any harmful chemicals, as they are used in a product that is in close proximity to sensitive skin. Reputable manufacturers use high-grade, skin-safe adhesives that have been rigorously tested for dermatological compatibility. The quality of the adhesive, though invisible, is a critical component of a well-made, reliable, and safe sanitary pad.

Component 6: The Release Paper and Wrapper, The Final Touches

The final components of a packaged sanitary pad are the release paper and the individual wrapper. While they may seem like simple packaging elements, they are also functional raw materials that contribute to the product’s hygiene, convenience, and overall user experience.

The Release Paper

The release paper is the strip of paper that covers the positioning adhesive on the back of the pad and its wings. Its sole purpose is to protect the adhesive from drying out or sticking to anything before it is ready to be used. When the user peels away the release paper, the adhesive is exposed, ready to be attached to the underwear.

The material used is typically paper that has been coated with a thin layer of silicone. Silicone is a release agent, meaning things do not stick to it easily. This non-stick surface allows the paper to be peeled away from the very tacky adhesive cleanly and without tearing or leaving any paper fibers behind. In many modern pad designs, the release paper is integrated with the individual wrapper, so that unwrapping the pad and peeling the release paper happens in a single, fluid motion.

The Individual Wrapper

Each sanitary pad is individually sealed in a wrapper for two primary reasons: hygiene and portability.

  • Hygiene: The wrapper keeps the pad clean and sterile from the point of manufacture until the moment of use. It protects the pad from dust, dirt, and moisture, which is essential for a product used in an intimate area.
  • Portability and Discretion: The wrapper allows a user to carry pads discreetly in a purse, backpack, or pocket.
  • Disposal: The wrapper also serves a crucial secondary function as a convenient and hygienic means of disposing of a used pad. The user can wrap the used pad in the wrapper from the new pad before throwing it in the trash.

The raw materials for wrappers are typically either a thin plastic film (polyethylene) or a soft non-woven fabric. Plastic film wrappers are common and cost-effective. Non-woven wrappers have a more premium, cloth-like feel and are often quieter to open, which some users prefer for added discretion. The choice of wrapper material contributes to the overall aesthetic and perceived quality of the product.

The 2025 Horizon: Sustainability and Innovation in Raw Materials

The conversation around what are the raw materials for sanitary pads is shifting dramatically. As of 2025, consumer awareness and regulatory pressure concerning environmental impact and personal health are at an all-time high. The feminine hygiene industry is in the midst of a green revolution, with innovation focused on moving away from petroleum-based plastics and conventional materials toward sustainable, biodegradable, and organic alternatives (Premiumhygieneproducts.com, n.d.).

The Rise of Plant-Based and Biodegradable Materials

The environmental burden of disposable menstrual products is significant. A conventional pad is composed almost entirely of plastic and non-biodegradable materials, meaning it can persist in a landfill for hundreds of years. This has spurred a fervent search for greener alternatives across every component of the pad.

  • Topsheets and Cores: Organic cotton and bamboo pulp are leading the charge. Beyond just the topsheet, some brands are now using 100% cotton for the entire absorbent core, replacing the traditional wood fluff pulp. Bamboo pulp is also being used as a sustainable alternative due to bamboo’s rapid growth and low resource requirements (Asim et al., 2021).
  • Backsheets and Wrappers: The biggest challenge has been replacing the polyethylene backsheet and wrapper. The solution is emerging in the form of bioplastics. Polylactic acid (PLA), which is derived from cornstarch, is a popular choice. It can be processed into a film that is both waterproof and commercially compostable. Other materials like Mater-Bi, a bioplastic made from a blend of vegetable starches, are also being used to create soft, “plastic-free” backsheets and wrappers.
  • Adhesives: Even adhesives are getting a sustainable makeover. Companies are developing bio-based hot-melt adhesives made from renewable resources, reducing the reliance on fossil fuel-derived synthetic rubbers.

The Challenge of “Biodegradable”

The term “biodegradable” can be complex. For a product to truly be environmentally friendly, it must be able to break down under specific conditions. Many bioplastics, like PLA, will only biodegrade in an industrial composting facility, where high temperatures can be maintained. They will not break down in a typical landfill. This places a responsibility on manufacturers to be transparent in their marketing and on communities to develop the infrastructure to handle these new materials.

The Focus on Health: Eliminating Chemicals of Concern

Alongside the environmental push is a growing concern about the chemicals present in conventional sanitary pads. This includes:

  • Chlorine Bleaching: Fluff pulp is traditionally bleached using chlorine, which can create dioxins as a byproduct. Dioxins are persistent environmental pollutants and potential endocrine disruptors. In response, many brands now use Totally Chlorine-Free (TCF) or Elemental Chlorine-Free (ECF) bleaching processes.
  • Fragrances and Dyes: Added fragrances and dyes can cause allergic reactions and skin irritation in sensitive individuals. The trend is moving towards fragrance-free and dye-free products that minimize the potential for chemical sensitization.

The future of sanitary pads lies in this dual pursuit of performance and principle. The ideal 2025 product is one that offers exceptional absorption and comfort while being made from renewable, body-safe materials that can return to the earth with minimal impact. This requires continuous innovation in material science and a commitment from manufacturers to transparency and sustainability.

Frequently Asked Questions (FAQ)

What is Superabsorbent Polymer (SAP) and is it safe to use in sanitary pads?

Superabsorbent Polymer (SAP) is a synthetic material, typically sodium polyacrylate, used in the core of sanitary pads to absorb and lock away large amounts of fluid. It can hold many times its own weight in liquid, turning it into a stable gel. Decades of extensive testing and use in consumer products have shown SAP to be safe for its intended application in sanitary pads. It is non-toxic and has a very low potential for skin irritation, especially since it is located in the core of the pad and does not come into direct contact with the skin.

Are pads made from organic cotton actually better?

“Better” depends on the user’s priorities. From a performance standpoint, conventional pads with synthetic topsheets may wick moisture away faster. However, organic cotton pads offer distinct advantages. They are exceptionally soft and breathable, which many users find more comfortable. For individuals with sensitive skin or allergies to synthetic materials, organic cotton can significantly reduce the risk of irritation or “pad rash.” Furthermore, organic cotton is grown without synthetic pesticides and is bleached without chlorine, which appeals to consumers looking to minimize their exposure to potentially harmful chemicals.

What does it mean when a sanitary pad is described as “breathable”?

A “breathable” sanitary pad has a backsheet (the bottom, waterproof layer) that is designed to let air and water vapor pass through while still blocking liquid. This is achieved by using a microporous film, often made of polyethylene mixed with calcium carbonate. The film is stretched during manufacturing to create tiny pores that are too small for liquid to escape but large enough for air and vapor molecules to circulate. This helps reduce the buildup of heat and humidity, leading to a cooler, drier, and more comfortable experience.

Why do some sanitary pads cause skin irritation or rashes?

Irritation from sanitary pads, sometimes called contact dermatitis or “pad rash,” can be caused by several factors related to the raw materials. Friction from the pad moving against the skin is a common cause. Moisture trapped against the skin by non-breathable materials can also lead to irritation. Additionally, some individuals may have a sensitivity or allergic reaction to specific materials in the pad, such as the synthetic fibers in the topsheet, fragrances, or dyes. Choosing pads made from soft, breathable, and hypoallergenic materials like organic cotton can help mitigate these issues.

Can sanitary pads expire and what are the risks of using an expired one?

Yes, sanitary pads do have an expiration date, typically around 3 to 5 years from the date of manufacture. While they are not perishable in the way food is, their components can degrade over time. The primary risk of using an expired pad is reduced performance. The adhesives may lose their stickiness, causing the pad to shift or not adhere properly. The absorbent materials, particularly the SAP, can degrade and may not absorb fluid as effectively, increasing the risk of leaks. While generally not a health hazard, it is best to use pads before their expiration date to ensure they function as intended.

A Final Thought on Materiality and Care

To dissect the sanitary pad is to appreciate the profound connection between material science and human dignity. Each layer, from the soft cotton topsheet to the powerful polymer core, represents a solution to a deeply human need: the need for comfort, for security, and for the freedom to move through the world unencumbered. The raw materials are not just inert substances; they are the vocabulary of care. As we look toward a more sustainable and health-conscious future, the evolution of these materials will continue to be a quiet but powerful force in improving the daily lives of millions.

References

Asim, M., Uddin, M. A., & Lqbal, N. (2021). Bamboo as a sustainable and renewable resource for textiles and other applications. In M. S. Islam & M. A. Rahman (Eds.), Sustainable fibres and textiles. The Textile Institute Book Series. Woodhead Publishing.

Jieyacn.com. (n.d.). OEM Facotry Winged Sap Private Label Sanitary Napkins Sanitary Pads. Retrieved November 17, 2024, from

Premiumhygieneproducts.com. (n.d.). China Sanitary Napkin Suppliers Factory. FEIYUE. Retrieved November 17, 2024, from

U.S. Food and Drug Administration. (2020, February 21). The Facts on Tampons—and How to Use Them Safely. FDA. https://www.fda.gov/consumers/consumer-updates/facts-tampons-and-how-use-them-safely

Ulger, P., & Hockenberger, A. (2021). Raw materials for hygiene products. In J. R. Wagner (Ed.), Hygiene and personal care products: A practical guide (pp. 1-28). De Gruyter.