There is no doubt that PU coating provides strong water-repellent characteristics and can make fabrics completely waterproof. Meanwhile, it can be applied once (single-coated) or multiple times (multicoated).
What is PU Coated Fabric?
Polyurethane (PU) is a type of polymer that is commonly used in the coating of fabrics. When applied to fabrics, PU provides a range of properties that make them suitable for a variety of uses, including water resistance, abrasion resistance, flexibility, and breathability.
How does PU Coated Fabric Made?
PU coated fabric is made by applying a layer of polyurethane to a fabric substrate. The process involves coating the fabric with a mixture of polyurethane and a solvent, which is then dried and cured to create a strong and durable coating.
The first step in the process involves preparing the fabric substrate by cleaning and priming it. This is done to ensure that the polyurethane adheres properly to the fabric and creates a strong bond.
Next, the polyurethane mixture is prepared by combining polyurethane resin with a solvent such as dimethylformamide (DMF) or dimethylacetamide (DMAc). The mixture is then applied to the fabric substrate using a variety of techniques, including dipping, spraying, or roller coating.
Once the fabric has been coated with the polyurethane mixture, it is dried to remove the solvent and cure the polyurethane. This can be done using a variety of methods, including hot air drying, infrared drying, or oven drying.
After the fabric has been dried, it is inspected to ensure that the coating is uniform and free of defects. If necessary, additional coatings may be applied to achieve the desired properties.
Finally, the coated fabric is tested to ensure that it meets the required specifications for its intended use. This may include testing for water resistance, abrasion resistance, and flexibility, among other properties.
Overall, the process of making PU coated fabric is complex and requires specialized equipment and expertise. However, the resulting fabric is highly versatile and provides a range of benefits that make it ideal for use in a variety of industries and applications.
What does “waterproof” mean?
Waterproof refers to the ability of a material or object to resist the penetration of water. Waterproof material is impermeable to water and does not allow any water to pass through it. This is in contrast to water-resistant materials, which can resist the penetration of water to some extent but are not completely impermeable. The term waterproof is commonly used in relation to clothing, footwear, outdoor gear, electronics, and other products that may be exposed to water or moisture. Materials and products that are waterproof are often designed to protect against water damage or to keep the user dry and comfortable in wet conditions.
What Factors Will Affect the Waterproofing Capabilities of PU Coated Fabric?
Coating thickness: The thickness of the PU coating can affect the waterproofing capabilities of the fabric. If the coating is too thin, water may be able to penetrate the fabric, while a thicker coating can provide better protection against water.
Fabric type: The type of fabric used as the substrate for the PU coating can also affect the waterproofing capabilities. Some fabrics are naturally more water-resistant than others and may require less coating to achieve waterproofing.
Surface finish: The surface finish of the fabric can also play a role in its waterproofing capabilities. A smoother surface may be more effective at repelling water than a rough or textured surface.
UV exposure: Exposure to UV radiation from sunlight can break down the PU coating over time, reducing its effectiveness at repelling water.
Wear and tear: The wear and tear on the fabric can also affect its waterproofing capabilities. Over time, the PU coating may wear off or become damaged, allowing water to penetrate the fabric.
Seams and stitching: The seams and stitching on the fabric can also affect its waterproofing capabilities. If the seams are not properly sealed or if the stitching creates holes in the fabric, water may be able to penetrate these areas.
Chemical exposure: Exposure to certain chemicals can also affect the waterproofing capabilities of PU coated fabric. Some chemicals can damage the PU coating, reducing its ability to repel water.
Overall, the waterproofing capabilities of PU coated fabric can be affected by a variety of factors, and it is important to consider these factors when selecting and caring for waterproof fabrics.
What applications of PU Coated Fabric?
PU coated fabric is widely used in outdoor applications due to its excellent waterproofing capabilities and durability. Here are some of the common outdoor applications of PU coated fabric:
Tents: PU coated fabric is widely used in the manufacturing of tents due to its waterproofing and UV resistance properties. Tents made from PU coated fabric provide excellent protection from rain and wind, making them ideal for outdoor camping and hiking.
Backpacks: PU coated fabric is commonly used in the manufacturing of backpacks due to its lightweight, durability, and water resistance. Backpacks made from PU coated fabric are ideal for outdoor activities such as hiking, camping, and mountaineering.. The fabric’s durability and water resistance make it an ideal choice for outdoor sports equipment that is exposed to harsh weather conditions.
Rainwear: PU coated fabric is an excellent choice for manufacturing rainwear due to its water repellent and windproof properties. PU coated rainwear keeps the wearer dry and comfortable in rainy weather conditions, making it an essential outdoor gear for hikers, bikers, and mountaineers.
Awnings and canopies: PU coated fabric is widely used in the manufacturing of awnings and canopies due to its waterproofing and UV resistance properties. Awnings and canopies made from PU coated fabric protect outdoor spaces such as patios, decks, and gardens from rain and UV rays.
In conclusion, PU coated fabric is an excellent choice for outdoor applications due to its waterproofing, durability, and UV resistance properties. Its versatile use in outdoor gear and equipment makes it a go-to fabric for those who enjoy outdoor activities and need reliable protection from the weather.
Conclusion
Coated fabric is a textile that has been coated to enhance its properties such as water repellency, durability and UV protection. One of the most popular types of coated fabrics is PU (Polyurethane) coated fabrics, which are known for their water repellent properties.
The waterproof performance of PU coated fabrics is affected by many factors, so when considering the fabric, it is necessary to include the type and grammage of the base fabric, the thickness and number of layers of the coating, and the quality of the coating application. The coating should be applied evenly and thoroughly to ensure maximum water resistance.
PU coated fabrics are known for their durability and abrasion resistance in addition to being water repellent. This makes it ideal for applications requiring a strong and durable material. The PU coated fabric is also UV resistant, meaning it can withstand prolonged exposure to sunlight without deterioration.
Overall, the waterproof capabilities of coated fabrics make them a popular choice for a wide range of applications. Its versatility, durability and UV resistance make it an ideal fabric for outdoor gear and equipment as well as everyday items such as bags and furniture. With proper care and maintenance, PU coated fabrics can provide reliable waterproofing and protection for years to come.
