Essential Types, Properties, Function of Fusible Interlining

Fusible interlinings are auxiliary materials used in apparel production to improve the fabric’s formability and tactile properties, and to give the garment a better silhouette. The fusing process bonds the interlining to the outer fabric with a thermoplastic resin to create a laminate structure. The strength of the bond is important for the garment’s quality, as consumers want the garment to keep its shape during wear and after repeated washing. In this article we will discuss Essential Properties, Types & Function of Fusible Interlining.


Interlining is a layer of fabric inserted between the two layers of a garment. It is considered as an accessory which stays in between two layers of fabric in a garment to support, reinforce and control areas of garments and to retain actual shape. They may provide improved hand feeling and improve performance for garments.

Fusible Interlining

Cause of using interlining:

  1. Interlining is used in the garments to support, reinforce and control areas of garments and to retain actual shape of the garment component.
  2. To make the particular component beautiful, strong and attractive.
  3. To get better hand feel and better performance.

Required Properties of Fusible Interlining

  • The fusing temperature in fusible interlining must not be too high that may damage the outer fabric or its color. Usual maximum temperature is 175˚C, but recommended temperature is 150˚C.
  • The fusing temperature must not be too low that may lead weak bonding between base fabric and outer fabric. The lower limit of temperature is generally 110˚C. Weak bond may be broken by washing or during use.
  • The resin should provide a bond which can suitably resist washing or dry cleaning.
  • The thermoplastic nature of resin should be such that adjustment of temperature is sufficient to permit resin to penetrate the outer fabric to give a bond without flowing excessively to give strike through or strike back.
  • The resin should contribute to achieve the desired hand feel.
  • It should not be hazardous for health during processing or use.
  • Its color should be white in common cases and it should be transparent.
  • It should have low dye retention properties.

The most common types Fusible Interlining:

By Resin Coating:

  • Polyamide Coated Interlining:

Polyamide Coated Interlining

Made with nylon resin, this interlining offers excellent strength, durability, and recovery. It’s ideal for collars, cuffs, waistbands, and other areas requiring high shaping power. However, it can be less breathable and more expensive than other options.

  • Polyvinyl Chloride (PVC) Coated Interlining:

Polyvinyl Chloride (PVC) Coated Interlining

A cost-effective choice known for its stiffness and structure. It’s perfect for bags, belts, and tailored jackets that need to maintain a crisp form. However, PVC interlining can be bulky, less breathable, and might not be washable.

  • Polyethylene Coated Interlining:

Polyethylene Coated Interlining

A lightweight and affordable option that provides moderate structure and stability. It’s suitable for shirt collars, cuffs, and lightweight jackets. However, polyethylene interlining might not withstand high washing temperatures.

  • Polyester Coated Interlining:

Polyester Coated Interlining

A versatile interlining offering a good balance of weight, drape, and adhesion. It’s popular for a wide range of garments, from blouses and dresses to jackets and bags. Polyester interlining comes in various weights and finishes to suit different needs.

  • Polypropylene Coated Interlining:

Polypropylene Coated Interlining

A lightweight and washable option known for its breathability and soft drape. It’s well-suited for garments made from natural fibers like cotton or linen. However, polypropylene interlining might not provide enough structure for heavier fabrics.

  • Polyvinyl Alcohol (PVA) Coated Interlining:

Polyvinyl Alcohol (PVA) Coated Interlining

A water-soluble interlining that’s ideal for delicate fabrics or fusible appliqué. It dissolves easily in water after fusing, leaving a clean and invisible bond. However, PVA interlining is not very washable and might not be suitable for heavy-duty applications.

Other Types:

  • W weft-Knit Fusible Interlining:


W Weft Knit Fusible Interlining

Made from knitted fibers, this interlining offers a soft and flexible drape. It’s perfect for garments that need some structure without compromising on comfort, such as dresses and knitwear.

  • Woven Fusible Interlining:


Woven Fusible Interlining

Constructed from woven fibers, this interlining provides a crisp and stable structure. It’s suitable for tailored jackets, coats, and other garments requiring a structured look.

  • Non-woven Fusible Interlining:


Nonwoven Fusible Interlining

The most common type, made from bonded fibers. It comes in various weights and offers a range of stiffness and drape options. Non-woven fusible interlining is a versatile choice for a variety of garments.

  • Quilted Fusible Interlining:


Quilted Fusible Interlining

A double-sided interlining with a layer of batting sandwiched between two woven or non-woven fabrics. It adds both structure and warmth to garments, making it ideal for jackets, vests, and cold-weather clothing.

Key Functions of Fusible Interlining:

  • Reinforcement: Fusible interlining adds strength and stability to weaker fabrics, preventing them from sagging or losing shape. This is particularly crucial for collars, cuffs, waistbands, and other areas that experience stress during wear.
  • Shape Preservation: By providing structure, fusible interlining helps garments maintain their intended form. This is essential for achieving crisp collars, clean lapels, and tailored silhouettes.
  • Improved Drape: The right interlining can enhance the way fabric falls on the body. For instance, a lightweight interlining can add a touch of body to a drapey fabric without compromising its flow.
  • Easy Sewing: Fusible interlining provides a smoother surface, making sewing easier and more precise. This is especially beneficial for intricate details and delicate fabrics.

Properties Fusible Interlining:

Lets discuss about Properties of Fusible Interlining

1. Adhesive Quality

The adhesive used in fusible interlining must form a strong and durable bond with the fabric.  The interlining should seamlessly bond with the fabric using heat and pressure. A secure bond ensures the interlining stays put throughout garment use and washing cycles. The primary characteristics include:

Bond Strength: Ensures the interlining adheres firmly without peeling off during wear or washing.

Even Distribution: The adhesive should be evenly distributed to avoid uneven texture and stiffness.

2. Compatibility with Fabrics

The interlining must be compatible with a wide range of fabrics. Key aspects to consider are:

Fabric Type: It should bond well with various fabrics like cotton, polyester, silk, and wool.

Color Compatibility: The adhesive should not affect the color of the fabric, especially in light-colored or sheer fabrics.

3. Heat Sensitivity

The fusible interlining should have an appropriate melting point that ensures easy bonding without damaging the fabric. Important factors include:

Melting Temperature: Should be low enough to bond quickly but high enough to withstand garment pressing and ironing.

Heat Resistance: The interlining should remain stable under repeated heat exposure during garment care.

4. Flexibility and Drape

Interlining should enhance the garment’s flexibility and drape without making it too stiff. Consider the following:

Softness: The interlining should feel soft and comfortable against the skin.

Drape: It should enhance the natural drape of the fabric, maintaining its intended flow and movement.

5. Washability and Durability

Choose an interlining compatible with the garment’s washing instructions. This ensures the bond remains strong and the garment retains its shape after washing or dry cleaning. Garments with fusible interlining must withstand regular washing and wear. Important considerations are:

Wash Fastness: The interlining should remain bonded through multiple wash cycles.

Durability: It should resist wear and tear, maintaining its structure and support over time.

6. Thickness and Weight

The interlining’s thickness and weight should be appropriate for the fabric and garment type. Key properties include:

Weight Range: It should be available in various weights to suit different fabrics and garment parts, like collars, cuffs, and front panels.

Thickness: The thickness should enhance the fabric without adding bulk or altering its natural properties.

7. Breathability

The interlining should not compromise the breathability of the fabric, especially in garments intended for warm weather or active wear. Key aspects include:

Air Permeability: It should allow air to pass through, maintaining comfort and reducing sweat accumulation.

Moisture Management: The interlining should help manage moisture, keeping the garment dry and comfortable.

8. Weight and Drape

The weight and stiffness of the interlining should complement the weight and drape of your fabric. A lightweight interlining works well for flowy fabrics, while a heavier interlining is ideal for structured garments

9. Colorfastness: Opt for a colorfast interlining that won’t bleed or discolor your main fabric during the fusing process. White or translucent interlining is a versatile choice, but colored options might be suitable for specific projects.

Uses of Fusible interlining

Fusible interlining has a wide range of applications in garment construction, from providing essential structure to enhancing the overall look and feel of your clothes. Here’s a breakdown of some key uses:

Adding Structure and Support:

  • Collars and Cuffs: Fusible interlining helps collars and cuffs maintain their shape, preventing them from drooping or losing their crispness. This is crucial for achieving a polished and professional look in shirts, blouses, and jackets.
  • Waistbands: Interlining adds stability to waistbands, preventing them from sagging or stretching out of shape. This ensures a comfortable and flattering fit for pants, skirts, and dresses.
  • Plackets: Fusible interlining reinforces plackets (the folded closures on shirts and jackets), preventing them from gapping or losing their shape during wear and tear.
  • Pockets: It strengthens pocket openings and adds structure to bag pockets, preventing them from collapsing or bulging.
  • Buttonholes: A small piece of interlining can be used to stabilize buttonholes, preventing them from fraying or stretching out of shape.

Enhancing Appearance and Drape:

  • Creating Crisp Edges: Fusible interlining helps achieve clean and sharp edges on lapels, facings, and other garment components.
  • Improving Drape: The right interlining weight can enhance the way fabric falls on the body. For example, a lightweight interlining can add a touch of body to a flowy fabric without compromising its drape.
  • Adding Softness and Body: Specific interlinings can provide a soft structure to garments like dresses and blouses, creating a more flattering silhouette.
  • Appliqué and Embellishments: Fusible interlining is a great way to attach appliqués, patches, and other embellishments securely to your garment.

Additional Uses:

  • Bags and Accessories: Fusible interlining provides structure and stability to bags, belts, and other accessories, helping them maintain their shape and function.
  • Homeware: Interlining can be used to stiffen and stabilize fabric for projects like placemats, potholders, and tote bags.

Fusible interlining is a garment construction hero, but like any hero, it has its strengths and weaknesses. Let’s delve into the advantages and disadvantages of this heat-activated wonder.

Advantages of Fusible Interlining:

  • Efficiency: Compared to sewn interlining, fusible interlining is a breeze to apply. The heat press method saves time and labor, making it ideal for mass production.
  • Skill-Friendly: No need for expert sewing skills! The fusing process is relatively straightforward, allowing even novice sewers to achieve professional-looking results.
  • Cost-Effective: Fusible interlining itself is often cheaper than sewn alternatives. Additionally, the faster application process reduces labor costs.
  • Clean Finish: The fused bond creates a smooth, seamless finish on the garment’s interior, enhancing its overall appearance.
  • Versatility: Fusible interlinings come in various weights, materials, and properties, offering options for different fabrics and garment styles.

Disadvantages of Fusible Interlining:

  • Heat Sensitivity: Incorrect heat settings can damage delicate fabrics or cause scorching. Always test on a scrap before applying.
  • Limited Reusability: Unlike sewn interlining, which can be removed and reused, fusible interlining forms a permanent bond. Mistakes are harder to rectify.
  • Washing Limitations: Not all fusible interlinings can withstand high temperatures or harsh chemicals. Choose one compatible with the garment’s washing instructions.
  • Bulk Potential: Heavyweight fusible interlinings can add unwanted stiffness or bulk to a garment. Opt for lighter options for flowy fabrics.
  • Potential for Bond Failure: Over time, or with improper washing, the fused bond might weaken or detach.


By strategically using fusible interlining, you can elevate your garment construction skills and create garments with a professional and polished finish. Remember to choose the interlining type based on the fabric weight, desired structure, and garment function for optimal results. Hopefully by reading this article we are able to make you understand about Essential Types & Function, Properties of Fusible Interlining

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