Understanding Nonwoven Interlining: Uses, Types, and How to Choose the Right One

What is Nonwoven Interlining?

Definition and Structure

Nonwoven interlining is a type of fabric reinforcement made by bonding fibers together rather than weaving or knitting. This process produces a lightweight, isotropic material that can be cut in any direction without worrying about grainline. Nonwoven interlining is available as fusible, which has an adhesive backing activated by heat, or sew-in, which requires stitching into garments. It provides stability, shape, and support to fabrics in clothing and home textile projects.

• Bonded fiber construction rather than woven threads.
• No defined grain, allowing flexible cutting in any direction.
• Available as fusible or sew-in varieties for different applications.

Why Use Nonwoven Instead of Woven Interlining

Nonwoven interlining offers advantages over woven interlining, including lower cost, easier cutting, and greater versatility. It can be used on a wide range of fabrics and project types, making it suitable for both delicate and heavy fabrics. Nonwoven interlining simplifies workflow and reduces fabric waste, while providing effective support where needed.

• More affordable than woven interlining.
• Flexible cutting and reduced fabric waste.
• Wide range of types and weights for different sewing and textile needs.

Types and Weights of Nonwoven Interlining

Lightweight Nonwoven Interlining for Dresses and Delicate Fabrics

Lightweight nonwoven interlining is ideal for delicate fabrics such as silk, chiffon, and light cotton. It provides gentle structure for collars, cuffs, waistbands, and bodices without affecting the drape or softness of the fabric. This type of interlining ensures garments retain natural movement while offering support.

• Best suited for lightweight fabrics like silk, chiffon, and lightweight cotton.
• Provides gentle support without adding stiffness.
• Maintains drape and comfort in flowing garments.

Medium-weight and Heavyweight Nonwoven Interlining for Garments and Home Textiles

Medium-weight and heavyweight nonwoven interlining are used when more structure is needed. Medium-weight interlining works well for shirts, jackets, and everyday garments, providing a balance of support and flexibility. Heavyweight interlining is suitable for structured coats, bags, upholstery, and home textiles, adding rigidity and shape retention for durable projects.

• Medium-weight: suitable for jackets, shirts, and structured garments.
• Heavyweight: ideal for coats, bags, upholstery, and home textile projects.
• Ensures long-lasting shape and professional finish for heavier fabrics.

How to Use Nonwoven Interlining in Sewing Projects

Fusible Nonwoven Interlining vs Sew-in Nonwoven Interlining

Fusible nonwoven interlining has an adhesive backing that bonds to fabric with heat. It is ideal for flat areas such as collars, cuffs, and facings. Sew-in interlining does not have adhesive and is stitched into garments, offering flexibility for delicate fabrics or stretchable materials. Choosing the right type depends on fabric characteristics and the desired garment structure.

• Fusible: quick adhesion for flat areas.
• Sew-in: no adhesive, suitable for flexible or delicate fabrics.
• Choice depends on fabric type and desired drape or stiffness.

Application Steps and Best Practices for Sewing and Fusing

To apply fusible nonwoven interlining, first pre-wash and press the fabric. Place the adhesive side of the interlining against the wrong side of the fabric, cover with a pressing cloth, and apply heat and pressure according to instructions. Allow the fabric to cool before handling. For sew-in interlining, baste or stitch along seam allowances to provide support without adhesives. Testing on a scrap piece first ensures proper adhesion and prevents fabric damage.

• Pre-wash and press fabric to avoid shrinkage.
• Place adhesive side down and cover with pressing cloth.
• Apply heat and pressure according to guidelines.
• Allow cooling before further handling.
• For sew-in type, baste or stitch appropriately.

Choosing the Right Nonwoven Interlining for Your Project

Matching Interlining GSM/Weight to Fabric Weight and Purpose

Selecting the correct weight of nonwoven interlining is crucial. Lightweight interlining suits delicate fabrics, medium-weight works for general garments, and heavyweight is ideal for structured items and home textiles. Consider both fabric type and intended use to achieve optimal structure and drape.

• Lightweight (20-40 GSM) for delicate fabrics and flowing garments.
• Medium-weight (40-80 GSM) for everyday garments requiring moderate structure.
• Heavyweight (80+ GSM) for coats, bags, upholstery, and structured home textiles.
• Match interlining weight with fabric drape and project purpose.

Common Pitfalls and How to Avoid Them

Improper selection or application of nonwoven interlining can lead to stiffness, fabric distortion, or poor adhesion. Avoid using too heavy interlining on lightweight fabrics. Follow correct fusing temperature and pressure for fusible types. Test on fabric scraps to prevent damage and ensure the desired finish.

• Too heavy interlining can make fabric stiff.
• Incorrect fusing temperature or pressure may damage fabric.
• Nonwoven interlining may degrade with repeated washing.
• Always test on scrap fabric before full application.

Nonwoven Interlining for Upholstery and Home Textiles

Nonwoven interlining is useful in upholstery, curtains, and cushions to add structure and stability. It helps maintain shape, prevents sagging, and is a cost-effective solution for home textile projects. Selecting the appropriate weight and application method is key for durability and performance.

• Provides structure for curtains, drapes, and upholstery.
• Prevents sagging and maintains shape over time.
• Cost-effective reinforcement for home textiles.
• Proper weight selection ensures long-term performance.

Pros and Cons of Nonwoven Interlining

Advantages

Nonwoven interlining is cost-effective, versatile, and easy to use. It simplifies cutting, reduces fabric waste, and adapts to various garment and home textile applications. Fusible and sew-in types offer flexibility for different fabrics and project requirements.

• More affordable than woven interlining.
• Easy to cut, reducing fabric waste.
• Available in multiple weights for different projects.
• Fusible or sew-in types for flexible applications.

Limitations

Nonwoven interlining may have lower durability compared to woven interlining. Improper weight selection or incorrect fusing can affect drape, stiffness, and long-term performance. It may not be suitable for heavy-duty, high-wear projects without careful consideration.

• Less durable than woven interlining.
• Incorrect weight or application can affect drape and stiffness.
• Not ideal for high-wear or heavy-duty applications.

FAQ

What weight (GSM) of nonwoven interlining should I choose for a cotton dress?

For a cotton dress, lightweight nonwoven interlining (20-40 GSM) is best for maintaining soft drape, while medium-weight (40-80 GSM) provides more structure for collars or waistbands. Always test on a scrap piece first.

Can nonwoven interlining be used on knit fabrics without affecting stretch?

Nonwoven interlining may reduce stretch on knit fabrics. Use lightweight or sew-in interlining to preserve flexibility. Always test on a fabric scrap to ensure the desired stretch and drape are maintained.

How to fuse nonwoven interlining properly without damaging fabric?

Pre-wash and press the fabric. Place adhesive side down, cover with a pressing cloth, and apply heat and pressure according to instructions. Allow the fabric to cool fully before handling. Testing on scrap fabric is recommended to prevent damage.