Sanitary Napkin Papers

Medical Grade PE White Back Layer: Description and Specifications

A Medical Grade PE (Polyethylene) White Back Layer is a specialized material used in various medical applications, particularly in wound care, dressings, medical packaging, and as a protective layer in medical devices. The material offers several features that make it ideal for use in medical environments where cleanliness, protection, and comfort are essential.

• Material: Polyethylene (PE), a durable, flexible thermoplastic polymer that is widely used in medical devices and packaging due to its chemical resistance, biocompatibility, and low moisture absorption.
• Color: White, which is typically preferred in medical settings for cleanliness and the ability to clearly view any signs of contamination.
• Back Layer Function: The white back layer typically serves as a protective outer layer in various medical products, offering a barrier to external contaminants while providing a smooth surface for patient contact.

1. Material Type:

   • Polyethylene (PE), medical-grade with appropriate certifications (such as ISO 10993 for biocompatibility).

2. Thickness:

   • Typically ranges from 0.03 mm to 0.10 mm, depending on the application. For example, thinner layers are often used for medical dressings, while thicker versions may be used in protective packaging.

3. Tensile Strength:

   • The material has a high tensile strength, providing durability without compromising flexibility.

4. Elasticity/Flexibility:

   • PE is highly flexible, making it suitable for products that need to conform to body contours or be used in products that require movement.

5. Biocompatibility:

   • Medical-grade PE is non-reactive with human skin and tissues, ensuring it can be safely used in direct contact with patients, particularly in dressings, bandages, or surgical kits.

6. Water Resistance:

   • Polyethylene is water-resistant, providing an effective barrier against moisture, which is crucial in many medical applications.

7. Barrier Properties:

   • Acts as a physical barrier to bacteria and external contaminants, preventing contamination in medical products.

8. Temperature Resistance:

   • PE can withstand a wide range of temperatures, making it suitable for both sterilization and medical storage conditions.

9. Opacity/Transparency:

   • Generally, PE used in medical products is opaque or slightly translucent, which is suitable for visibility during medical inspections without compromising sterility.

10. Sterilization Compatibility:

    • Can typically be sterilized using methods like gamma radiation, ethylene oxide (EO) gas, or steam (depending on the product design and thickness).

11. Durability and Strength:

    • PE offers high durability while remaining lightweight, contributing to the overall strength and functionality of the final medical product.

12. Applications:

    • Medical Packaging: Packaging for sterile medical instruments and devices.
    • Wound Care: Protective layer in wound dressings.
    • Surgical Applications: Used in surgical drapes and gowns as a protective layer.
    • Sterile Barrier Systems: Common in sterile packaging for pharmaceuticals or medical kits.

• Safety: Prevents contamination by offering a barrier to pathogens and moisture.
• Comfort: The flexibility and softness provide comfort in medical dressings.
• Reliability: Medical-grade PE maintains its integrity under various environmental conditions, ensuring performance.
• Ease of Use: Its pliability and low weight make it easy to incorporate into medical applications.

Medical Grade PE White Back Layers are versatile, durable, and reliable materials used in a wide variety of medical products, providing essential protection while maintaining patient safety and comfort.

Sanitary napkin SAP (Super Absorbent Polymer) gel sheet rolls are a key component used in the production of absorbent hygiene products like sanitary napkins and diapers. The SAP gel sheet is responsible for absorbing and locking moisture, ensuring that the product remains dry and comfortable for extended periods.

1. Material Composition:

   • Super Absorbent Polymer (SAP): The SAP material is the core component that absorbs and locks in liquids, turning them into gel. This helps prevent leakage and keeps the surface dry.
   • Nonwoven Fabric Layers: The SAP is sandwiched between nonwoven fabric layers that help distribute the fluid evenly and act as a barrier against leakage.

2. Size and Dimensions:

   • Width: The width of the roll can vary depending on the manufacturer and product specification, typically ranging from 200 mm to 500 mm.
   • Length: Lengths vary, but commonly range from 1 meter to several meters per roll, depending on the manufacturing process.
   • Thickness: The thickness of the SAP gel sheet usually ranges from 0.3 mm to 1 mm.

3. Absorbent Capacity:

   • Absorption Rate: SAP gel sheets typically absorb liquids quickly, with absorption capacities ranging from 200 ml to over 500 ml per gram of SAP.
   • Retention Capacity: The SAP gel sheet can hold significant amounts of liquid while maintaining its gel-like consistency, preventing leakage or moisture from transferring to the surface.

4. Gel Formation:

   • Once liquid is absorbed, the SAP swells and turns into a gel, trapping the fluid inside and preventing it from escaping.
   • The gel structure minimizes odor, and its uniformity ensures even distribution of fluid across the product.

5. Hydration and Swelling Characteristics:

   • Hydration Time: The SAP gel sheet is designed to quickly hydrate when it comes into contact with liquid, ensuring fast absorption.
   • Swelling Ratio: Depending on the SAP’s chemical formulation, it can swell many times its original size (typically 10–20 times its weight in water).

6. Compatibility with Other Materials:

   • The SAP gel sheet roll is designed to work in combination with other layers in the sanitary napkin or diaper, such as the top sheet, back sheet, and adhesive layers.

7. Packaging:

   • SAP gel sheet rolls are typically packaged in plastic or cardboard rolls to protect them from contamination and moisture until they are ready for processing.

8. Color:

   • SAP gel sheets are often transparent or slightly white but can also be colored depending on the manufacturer’s preferences.

9. Quality Control:

   • Quality checks are carried out to ensure that the SAP gel sheets maintain consistent absorption, retention, and swelling properties. The final product undergoes testing to ensure the gel sheets meet hygiene and safety standards.

• Sanitary Napkins (Pads): SAP gel sheets are widely used in sanitary napkins to ensure efficient absorption and dryness.
• Baby Diapers: SAP is crucial for diapers, ensuring comfort and preventing leakage.
• Adult Incontinence Products: These products also use SAP gel sheets for absorbency.

• High Absorbency: SAP gel sheets can absorb liquids many times their weight, keeping the surface dry for longer periods.
• Leak Prevention: The gel locks moisture inside, preventing it from leaking out.
• Comfort: The gel maintains a dry and comfortable feeling, even during heavy flow or extended use.
• Odor Control: SAP helps in trapping moisture and controlling odors.

• Environmental Impact: Some SAP materials may take longer to degrade, and manufacturers are working on developing more eco-friendly alternatives.