You can recognize interlock knit fabric by its smooth appearance and soft, sturdy feel. Both sides of interlock knit fabric look identical and offer a gentle touch with added strength. This material is created using a double-knit process, where two sets of needles work together to form two layers at the same time. Interlock knit fabric stands out because both sides display tight rows of ‘V’ shaped ribs. When you cut interlock knit fabric, the edges remain flat instead of curling like other knit fabrics. Interlock knit fabric is thicker and more stable than single knits, yet it still stretches well and returns to its original shape. Many people choose interlock knit fabric, especially interlock cotton, for its comfort and durability. It holds its shape over time and absorbs moisture effectively. Interlock knit fabric is firm and not see-through, making it an excellent choice for sportswear and everyday clothing.
Key Takeaways
Interlock knit fabric feels smooth and soft on both sides. It stays flat and does not curl at the edges. It is made with a double-knit process using two sets of needles. This makes the fabric thick, stable, and stretchy. The fabric keeps its shape very well. Interlock knit fabric is strong and lasts a long time. It is also comfortable to wear. People use it for sportswear, casual clothes, baby outfits, and activewear. Interlock knit fabric can be made from different fiber blends. These include cotton, polyester, and spandex. Each fiber blend gives the fabric special benefits. Some make it softer, stronger, or stretchier. The fabric stretches evenly and feels soft. It does not shrink easily. This makes interlock knit easy to sew. It is great for making comfortable clothes that last a long time.
What Is Interlock Knit Fabric
Interlock Knit Structure
When you look at interlock fabric, you notice its smooth surface and identical appearance on both sides. This unique look comes from the way the knit forms. Interlock knit uses two layers of 1×1 rib fabrics that interlock together. Special knitting machines with two sets of needles—one on the cylinder and one on the dial—create this structure. The needles work in an alternating pattern, so they never clash. Each time the machine completes a visible row, it uses two feeds of yarn.
You can feel the difference when you touch interlock knit. The fabric feels thicker and more stable than other knits. The interlocking of the two rib layers keeps the wales, or vertical columns of stitches, from moving. This makes the fabric less stretchy than rib knits but much more stable. You do not see any curling at the edges, which is common in other knit fabrics. The double-layered structure also means the fabric resists warping and keeps its shape after washing.
Tip: Interlock knit fabric is a great choice if you want a fabric that stays flat and does not curl at the edges.
The strength of interlock knit comes from its structure. The two layers lock together, making the fabric sturdy and resistant to wear. You get balanced elasticity in both directions, so the fabric stretches evenly and returns to its shape. This makes interlock fabric perfect for close-fitting clothes and activewear.
Double-Knit Construction
You might wonder how interlock knit gets its special qualities. The answer lies in the double-knit construction process. Here’s how it works:
Special knitting machines use two sets of needles, one set facing the other.
The needles pull loops of yarn through other loops, creating two layers at the same time.
These layers interlock, forming a single, stable fabric that looks the same on both sides.
The loops are fine and packed closely together, giving the fabric a smooth and uniform finish.
The double-knit process makes interlock fabric thicker and more rigid than single knits. You get a fabric that does not stretch out of shape or pill easily. The close-packed loops also mean the fabric feels soft and comfortable against your skin.
Most interlock knit fabrics use cotton yarn, which gives a soft touch and good breathability. Sometimes, manufacturers blend cotton with other fibers like polyester, acrylic, or spandex. These blends add extra stretch, durability, or moisture-wicking properties to the fabric.
You can see why interlock knit stands out among other double-knit fabrics. While rib knits have more stretch and Ponte di Roma has a slight ribbed look, interlock fabric offers a smooth surface, balanced stretch, and excellent stability. This makes it a top choice for T-shirts, dresses, baby clothes, and sportswear.
How Interlock Knit Fabric Is Made
Knitting Process
To make interlock knit fabric, you first pick the yarn. The yarn you choose changes how the fabric feels and works. Cotton makes it soft. Polyester adds strength. Spandex gives it stretch. Some companies mix these fibers. This can help the fabric soak up water or last longer.
The steps to make interlock knit fabric are clear:
Yarn Preparation: You wind the yarn onto cones. Sometimes, you add texture. This can make the yarn more stretchy or strong.
Knitting: Special machines make the interlock knit. The machines form loops that lock together. This creates a double-layered fabric. Both sides look and feel the same.
Fabric Preparation: After knitting, you clean the fabric. You remove loose fibers and wash away chemicals. You might bleach it to make it bright and soft.
Dyeing and Finishing: You color the fabric with dye. You can also treat it to stop stains, block UV rays, or make it softer.
Quality Control: You test the fabric for stretch, strength, and color. Only the best fabric is sold.
Note: Every step helps make interlock knit fabric soft, strong, and dependable.
The main part of interlock knit fabric is how the loops are made. The machines use two sets of needles. One set is in a cylinder. The other is on a dial. The needles face each other at right angles. As the machine runs, the needles pull loops through each other. Only one set of needles works at a time. This keeps them from bumping into each other. The timing lets the loops lock together just right. This makes the fabric thicker, smoother, and more stable than single knits.
You can feel the difference when you touch interlock fabric. The double-knit process stops the edges from curling. Both sides look and feel the same. The loops are packed close together. This makes the fabric strong and keeps it from stretching out. The fabric keeps its shape even after many washes.
Machines and Needles
You need special machines to make interlock knit fabric. Most factories use double jersey circular knitting machines. These are also called interlock circular knitting machines. They have two sets of needles—one in the cylinder and one on the dial. The needles are set at right angles and work together.
Here are the main machines used for interlock knit fabric:
Interlock Circular Knitting Machines: These machines make thick, reversible fabric. They use two sets of needles to create the interlock structure.
Double System Flatbed Knitting Machines: Some factories use these machines. They can be programmed to move needles on two beds.
The needles are very important. Each bed (cylinder and dial) has two types of needles. Each type is controlled by its own cam system. The cams lift, clear, and knit the needles in a set way. This makes loops that lock together. The timing between the cylinder and dial needles can change the fabric. If both sets of needles make loops at once, the loops are bigger and the yarn is less tight. If the timing is slower, the fabric is tighter and stronger.
Tip: The way the needles are set up and timed gives interlock knit fabric its special strength and smooth feel.
The table below shows the main features of the machines used for interlock knit fabric:
Machine Type | Key Features | Resulting Fabric Qualities |
|---|---|---|
Interlock Circular Knitting Machine | Two sets of needles (cylinder and dial), 1×1 rib | Thick, smooth, reversible, stable |
Double System Flatbed Machine | Programmable needle beds, alternate knitting | Customizable, precise, sturdy |
You can see that using advanced machines and careful needle control makes interlock knit fabric smooth, stretchy, and strong. The locked loops make the fabric tough and comfy. This is great for clothes that need to keep their shape and feel soft.
Properties of Interlock Fabric
Texture and Appearance
When you touch interlock fabric, it feels soft and smooth. Both sides look the same because of the double-knit structure. There are no bumps or rough spots on either side. If you cut the fabric, the edges stay flat. You will not see the edges curl up like other knits. This gives the fabric a neat and even look. It works well for many kinds of clothes.
Here is a table that compares interlock knit with other knit fabrics:
Knit Fabric Type | Texture and Appearance | Stability and Stretch Characteristics | Typical Uses and Visual Impression |
|---|---|---|---|
Interlock Knit | Smooth surface on both sides, minimal curling | Thicker, more stable than single jersey, balanced stretch | High-quality t-shirts, dresses, sportswear; polished and comfortable |
Jersey Knit | V-shaped stitches front, bumps back | Lighter, stretchier in one direction, edges curl | Casual wear, basic t-shirts; less uniform appearance |
Pique Knit | Textured, raised geometric pattern | Stable, keeps shape well | Polo shirts, sportswear; structured and breathable look |
Ponte di Roma Knit | Smooth, firm, subtle ribbing | Exceptionally stable, wrinkle resistant | Tailored garments; polished, professional appearance |
Scuba Knit | Dense, smooth, spongy | Excellent shape retention, moderate stretch | Structured dresses, jackets; flattering silhouette |
You can see that interlock knit is very smooth and stable. The fabric feels soft and looks tidy. This makes it a popular choice for nice, comfy clothes.
Stretch and Durability
Interlock fabric stretches evenly in both directions. The double-knit structure helps it stretch but not lose its shape. If you pull on interlock knit, it goes back to how it was. This is good for clothes that need to move with you.
Interlock knit fabric is thicker and stronger than single jersey knit.
The loops in interlock knit are tight, so the fabric does not sag or warp.
You get a tough fabric that can handle washing and daily wear.
The weight and thickness come from the way it is knitted. Tests show interlock knit is more stable and has a medium drape. The fabric does not feel thin or weak. Instead, it is strong and lasts a long time.
Comfort and Performance
Interlock fabric is very comfy to wear. The soft, smooth surface feels nice on your skin. The fabric lets air pass through, especially if it is made from cotton. Interlock knit keeps you warmer than single jersey or rib knits. The thick fabric traps air, so you stay warm when it is cold.
Interlock knit fabric hangs nicely and does not stick to you.
The fabric soaks up sweat, so you stay dry.
You can wear interlock fabric for sports, casual clothes, or baby outfits.
The even stretch, softness, and warmth make interlock knit a great choice for comfort. You get a fabric that works well for many things, from playing sports to relaxing at home.
Interlock Knit vs Other Knits
Interlock vs Jersey Knit
Interlock knit and jersey knit are not the same. Interlock knit is made with two sets of needles. This makes it thicker and stronger. Jersey knit uses only one set of needles. That makes it lighter and stretchier. Interlock knit feels firm and smooth on both sides. Jersey knit has a smooth front and a bumpy back. Interlock knit is heavier and lasts longer. Jersey knit is softer and better for casual clothes. Interlock knit keeps its shape well. Jersey knit stretches more but can lose its shape. Interlock knit looks neat and is good for sports or dressy clothes. Jersey knit is best for t-shirts and comfy outfits. Interlock knit is made with a harder process. Jersey knit is made with a simple process. Interlock knit is strong and holds up well. Jersey knit is soft and lets air through.
You get a fabric that is sturdy and neat with interlock knit. Jersey knit is lighter and good for relaxed clothes.
Interlock vs Rib Knit
Interlock knit and rib knit are both double-knits. Rib knit has lines that go up and down. It stretches a lot. Interlock knit feels smoother and does not stretch as much. Interlock knit stays flat and keeps its shape. Rib knit is used for cuffs and collars because it stretches and snaps back. Interlock knit is better for shirts and dresses. It feels soft and looks tidy. Rib knit can curl at the edges. Interlock knit does not curl much.
Rib knit stretches more than interlock knit. Interlock knit is smooth and keeps its shape after washing.
Unique Benefits of Interlock
Interlock knit fabric has many good points:
The edges do not curl, so it is easy to cut and sew.
Both sides look and feel the same, so clothes look neat inside and out.
It stretches just enough and goes back to its shape.
The fabric is thick and not see-through, so you do not need a lining.
Interlock knit is soft and hangs nicely, so clothes feel good and look nice.
You can add spandex to make it stretch more without losing comfort.
Interlock knit is soft, strong, and works for many clothes. You can use it for sportswear, baby clothes, and more. Interlock jersey fabric gives a smooth look and feels comfy for a long time.
Types and Uses of Interlock
Fiber Blends
Interlock knit fabric comes in many fiber blends. Each blend changes how the fabric feels and works. Here are some common blends:
Cotton-polyester blends mix cotton and polyester. Cotton makes the fabric soft and lets air through. Polyester makes it strong and helps stop wrinkles. This blend feels nice and lasts a long time. It also does not shrink much.
Polyester-spandex blends are great for sports clothes. Spandex helps the fabric stretch and snap back. Polyester makes it tough and helps pull sweat away. This blend is good for workout clothes.
Cotton interlock uses only cotton fibers. It feels soft and lets your skin breathe. Cotton interlock is best for baby clothes and pajamas.
Polyester interlock is strong and dries fast. It does not wrinkle easily. You often see it in sports jerseys and uniforms.
Tip: Pick the right blend for what you need. Choose cotton interlock for comfort. Try polyester-spandex blends if you want stretch and to stay dry.
Common Applications
Interlock knit is used for many things. You see cotton interlock in both everyday and sports clothes. Here are some ways people use this fabric:
Activewear: Interlock is great for sports clothes. It is used in shorts, jerseys, and leggings. The fabric stretches and keeps its shape. This makes it perfect for activewear.
Casual wear: Cotton interlock is common in t-shirts, hoodies, sweatshirts, and dresses. It feels soft and stays nice after many washes.
Children’s clothing: Interlock cotton is gentle for baby clothes, blankets, and stretchy outfits.
Underwear and sleepwear: Interlock knit is soft and lets air through. It is good for briefs, camisoles, pajamas, and loungewear.
Winter wear: Interlock is used for sweaters, scarves, and cardigans. The double-knit keeps you warm.
Printing: Moisture-wicking interlock is good for printing designs. The fabric holds color well and dries quickly.
You can count on interlock knit for comfort and strength. It works for sports, sleep, and everyday clothes. Cotton and polyester interlock give you lots of choices.
When you pick interlock, you get a fabric that feels smooth and strong. It is made with a double-knit structure. Interlock is soft and comfy. It also lasts a long time. Both sides of interlock look and feel the same. This makes your projects look neat. The fabric does not curl at the edges. It stretches well and keeps its shape after washing. You can use interlock for sports clothes, baby outfits, and nice basics. Try using interlock for your next project and see how well it works.
FAQ
What makes interlock different from other knit fabrics?
You see interlock has a double-knit structure. Both sides look the same. The edges do not curl. This fabric feels thicker and more stable than single knits. You get a smooth, soft surface that holds its shape well.
Can you use interlock for activewear?
Yes, you can use interlock for activewear. The fabric stretches evenly and returns to its shape. It absorbs moisture and feels comfortable. Many sports brands choose interlock for leggings, shirts, and shorts because it stays strong after many washes.
Does interlock shrink after washing?
Interlock usually resists shrinking, especially when blended with polyester. If you use 100% cotton interlock, you might see slight shrinkage. Always follow care instructions. Wash in cold water and tumble dry low to keep the fabric in good shape.
Is interlock fabric good for sensitive skin?
You can trust interlock for sensitive skin. The fabric feels soft and smooth. It does not have rough seams or scratchy surfaces. Many parents pick cotton interlock for baby clothes and pajamas because it feels gentle and safe.
How do you sew with interlock fabric?
You can sew interlock easily. The edges stay flat, so you do not need special tools. Use a ballpoint needle and a stretch stitch. This helps the fabric move without breaking the thread. Interlock works well for T-shirts, dresses, and baby items.
