What is TPU coated fabric? Is it good for making bag?

In recent years, many new types of materials have emerged, suitable for manufacturing bags of various qualities. If you are making a high-quality bag that is waterproof, durable and flexible, and you are willing to invest in more advanced materials, TPU coated fabric is a great choice. TPU has the advantages of being non-toxic, environmentally friendly, free of plasticizers and recyclable.

This article will explore the advantages and applicability of TPU material. Understanding the characteristics of this new type of material can give you more options when choosing materials for designing and making bags.

What is TPU?

TPU (Thermoplastic Polyurethane) is a multifunctional elastomer (elastic polymer) that combines the properties of rubber and plastic. It is part of the thermoplastic elastomer (TPE) family, which means it can melt and reshape when heated (like plastic), while still maintaining flexibility and durability (like rubber).

Key Properties of TPU:

Types of TPU:

• Polyester-based TPU: Strong, chemical-resistant, good for adhesives and coatings.
• Polyether-based TPU: More flexible, hydrolysis-resistant, used in medical and marine applications.
• Polycaprolactone-based TPU: Biodegradable, used in eco-friendly products.

TPU vs. Other Polymers:

Why choose TPU?

• It is superior to PVC (more flexible, non-toxic, recyclable and more environmentally friendly).
• It is more durable than silicone in terms of wear resistance.
• It is easier to process than rubber (it can be melted and shaped like plastic).
• It offers a good balance of flexibility, strength and chemical resistance.

What is TPU coated fabric?

Tpu-coated fabric is a textile material laminated or coated with thermoplastic polyurethane (TPU), which is a multifunctional polymer. Tpu coated fabrics are a family of Erez textiles that utilize breakthrough polymer blends to create a unique strong thermoplastic polyurethane (TPU) coating, which is then applied to various high-quality polyester and nylon base fabrics using hot-melt or coating on complementary production lines.

Tpu-coated fabrics feature excellent resistance to extreme weather conditions, chemicals, wear and tear, and puncture, as well as high UV stability. This coating enhances the fabric’s performance, making it suitable for a wide range of industrial and consumer applications.

Key Features of TPU-Coated Fabric:

• Waterproof & Weather-Resistant: TPU forms a barrier against moisture, making the fabric ideal for outdoor and marine uses.
• Flexible & Elastic: Unlike PVC, TPU retains flexibility even in cold temperatures.
• Abrasion & Tear-Resistant: Provides excellent durability for heavy-duty applications.
• Eco-Friendly: TPU is recyclable and free from harmful plasticizers like phthalates (unlike PVC).
• Breathable (in some cases): Certain TPU coatings allow moisture vapor transmission (like in waterproof breathable fabrics).
• Resistant to Oils, Chemicals, and UV: Suitable for industrial and automotive uses.

Comparison with Other Coatings:

Is TPU coating safe?

Yes, non-toxic. TPU (thermoplastic Polyurethane) coatings are generally regarded as safe for most applications, including those involving direct human contact. TPU does not contain bisphenol a, phthalates or other common harmful plasticizers. It is usually used in food safety and medical-grade applications.

TPU vs. Other Coatings (Safety Comparison)

Is TPU Coating Toxic?

Non-toxic. In most cases, it is non-toxic. TPU does not contain phthalates (unlike PVC) and does not contain harmful plasticizers that will leach out over time. For end consumers, TPU coating is a safe, non-toxic and reliable material.

Why is the TPU coating non-toxic?

• Free of bisphenol a and phthalates: TPU does not contain bisphenol A (BPA) or phthalates, which are common harmful chemicals in some plastics.
• Chlorine-free or dioxin-free: Unlike polyvinyl chloride, TPU is chlorine-free and thus will not release dioxins during handling or heating.
• Biocompatibility: Some medical-grade tpu has been certified for skin contact or even implantation, proving that their toxicity is very low.

Summary of TPU coating is not toxic

Potential security issues

Additives and manufacturing processes

Some TPU may contain stabilizers, flame retardants or dyes, which may be harmful if not properly adjusted.

Low-quality TPU from unregulated manufacturers may contain impurities.

Odor (Instrument for volatile organic compounds)

New TPU products (such as inflatable or coated fabrics) may release a slight odor, but these odors are usually harmless and will dissipate over time.

Allergies and skin sensitivity

In very rare cases, skin irritation may occur, especially after prolonged contact (for example, watch straps or clothing coated with tpu).

Is TPU Coating Waterproof?

Yes, TPU (thermoplastic Polyurethane) coating is completely waterproof and offers excellent moisture-proof performance, making it an ideal choice for applications where waterproof protection is indispensable.

Why is TPU coating waterproof?

• Pore-free structure: TPU forms a tight and seamless barrier to prevent water penetration, even under pressure.
• Hydrophobic property: Naturally repels water and keeps the underlying fabric or material dry.
• Flexible and impermeable: Unlike hard waterproof coatings (such as some PVC layers), TPU remains elastic without cracking and maintains its waterproof performance over time.
• Seam sealing compatibility: TPU-coated fabrics can be heat-sealed or welded to ensure no water enters the weak points (common raincoats, inflatable bags and dry bags).

TPU vs. Other Waterproof Coatings

Is TPU coated fabric good for making bag?

Yes, TPU-coated fabric is an excellent material for making bags because it combines durability, flexibility, water resistance and environmental benefits.

Advantages of TPU-coated fabric for bags:

• Waterproof and weather-resistant: TPU offers a powerful barrier against water, moisture and dirt, making it an ideal choice for backpacks and travel bags.
• Durable and tear-resistant: The TPU coating features high wear resistance and puncture resistance, capable of withstanding frequent friction and scratches, ensuring long-lasting performance. It is ideal for heavy-duty use bags such as backpacks and canvas bags.
• Oil and chemical resistance: The TPU coating has excellent resistance to oily substances and chemical corrosion, making it suitable for use in environments where it may come into contact with oils or chemicals.
• Cold and heat resistance: The TPU coating can maintain stable performance even at extreme temperatures, making it suitable for making outdoor or industrial bags. TPU laminated fabric still maintains elasticity and flexibility in an environment of -35℃.
• Flexibility and lightness: Unlike PVC-coated fabrics, TPU-coated fabrics are lighter, which is conducive to daily carrying. TPU can maintain softness and flexibility, enhancing comfort and usability.
• High-end feel: TPU-coated fabric features a soft, high-quality feel and a clean, high-gloss finish. This makes them suitable for high-end bags, transparent cosmetic bags, or foldable travel bags, where aesthetics and feel matter.
• Environmental protection and safety: TPU is recyclable and free of harmful plasticizers (such as phthalates in PVC), making it a more sustainable choice.
• Easy to clean: The smooth, pore-free surface resists stains and can be wiped clean easily.

Key Considerations:

• Cost: The main drawback of TPU coated fabric is that it is usually more expensive than alternatives such as PVC or PU coated fabric, but it offers better performance and sustainability.
• Breathability: Is TPU coating breathable? Like most coated fabrics, TPU is not very breathable. Although some TPU coatings are designed to be breathable, waterproof barriers usually make the fabric impermeable. For making bags, this is usually not a problem.

The best uses of TPU coated bags:

• Outdoor and travel bags (backpacks, canvas bags)
• Waterproof handbags and fitness bags
• Eco-friendly and vegan bags (leather /PVC alternatives)

Conclusion

TPU (Thermoplastic Polyurethane) is a high-performance elastomer material with excellent wear resistance, tear resistance, oil resistance and low-temperature toughness. It is widely used in the production of bags, shoe materials, medical devices and other fields. TPU coated fabric has outstanding comprehensive performance and is an excellent material for making bags. If you are considering using this material to custom bags, please feel free to contact us for customization.