How to Pick the Right Zippers for Your Project

How do zippers work?

A zipper track has teeth on each side, each with a hook and hollow. The slide, moving up and down, merges the teeth to close the zipper. High-quality zippers create a strong bond that's hard to break unless the slide is moved to separate the teeth. For zippers to work, all teeth must be the same size.

Choosing the right zipper

Zippers are versatile fasteners used in boat covers, patio enclosures, cushions, gear, and apparel. With numerous variants, choosing the right type for a specific job can be challenging

We've simplified and explained common zipper components and types below.

Standard zipper structure

Standard Zipper Structure

• Zipper chain refers to the teeth or coil that interlock with each other, forming the closed or open state of the zipper.
• Zipper slider is the control part of the zipper, which merges or separates the teeth by sliding up and down.
• Pull tab is attached to the slider, users move the slider by grabbing it.
• Top stop is located at the top of the zipper, it prevents the slider from coming off the zipper.
• Bottom stop is located at the bottom of the zipper, it prevents the teeth from completely separating and keeps the slider from falling off.
• Tape refers the fabric strip to which the teeth are attached, forming the basis of the zipper.

Material Types of Zippers

• Nylon coil zipper: A nylon coil zipper consists of a continuous nylon coil sewn onto the tape, offering great flexibility and easy bending around corners. Its teeth form a continuous coil, earning it the name "coil zipper," making it suitable for various uses.
• Plastic zipper: A plastic zipper, typically made from PVC or polyacetal, has teeth molded directly onto the tape, resulting in a strong, durable fastener. The teeth are larger and more pronounced than those on nylon coil zippers. Plastic zippers are versatile, available in many colors, and popular for both fashion and practical uses.
• Metal zipper: A metal zipper consists of individual metal teeth, such as brass, nickel, aluminum, or stainless steel, clamped onto the zipper tape. Known for their durability and strength, metal zippers are commonly used in items requiring sturdy fastening, like jeans, leather jackets, and heavy-duty bags.
• Invisible zipper: An invisible zipper is hidden within a seam, with its teeth on the back of the tape. Once sewn into clothing, only the pull tab is visible, offering a seamless look. It's often used in formal wear, dresses, skirts, and other outfits where a sleek appearance is desired.
• Waterproof zipper: A waterproof zipper stops water and moisture from getting through, often with a sealed closure and possibly a rubber or plastic coating. They're key for outdoor gear, rainwear, marine uses, and any water-resistant or waterproof items.
• Long Chain Zipper (Continuous Zipper): A long chain zipper, or continuous zipper chain, is sold in lengths that can be customized. It comes without start or end pieces like sliders or stops, making it versatile for applications requiring custom sizes. This zipper type is popular in upholstery, tent making, and industrial uses where variable lengths are needed.

Types of Zipper

Types of Slider

   

• Auto lock slider: An auto lock slider features a mechanism that automatically locks the slider in place when there is no tension on the pull tab. This means the zipper will not slide down or open under normal conditions unless the pull tab is actively lifted and pulled.
• Semi auto lock slider: A semi-auto lock slider also has a locking mechanism, but it requires a bit more force or specific angle of pull to release the lock. This design provides a balance between security and ease of use. It locks the slider in place when not in use but allows for easier movement when the angle of pull is adjusted,
• Pin lock slider: A pin lock slider has a small pin inside the slider that fits into the teeth of the zipper, locking it in place when the zipper is closed. To move the slider, the pin must be disengaged, usually by pulling the tab upwards.
• Non lock slider: A non-lock slider does not have any locking mechanism. It allows for free movement of the slider along the zipper chain without any resistance.
• Reverse slider: A reverse slider is designed with the pull tab flat against the fabric, and the slider and teeth facing inwards. This design, often chosen for aesthetic reasons or to minimize snagging in outdoor gear and luggage, offers a sleeker appearance and can be more comfortable. The slider functions like standard ones but enhances the look and feel.

Zipper Quality and Durability

Selecting premium quality zippers is crucial for ensuring their enduring functionality. High-quality zippers greatly enhance their durability and extend their overall lifespan. The resilience of plastic and metal zippers varies markedly, especially in response to different environmental conditions.

• Nylon zipper
• Nylon zipper performs well in flexible applications due to their ability to bend and twist without breaking.
• Nylon zipper is resistant to corrosion and moisture, making them suitable for outdoor and marine environments.
• Plastic zipper
• Plastic zippers are strong and can handle a fair amount of stress and strain.
• Plastic zippers are less likely to corrode than metal zippers but can become brittle and break under extreme temperatures or with age.
• Durability varies with the type of plastic used, with some high-grade plastics offering excellent strength and longevity.
• Meal zipper
• Metal zippers are very durable and can withstand significant stress, making them suitable for heavy-duty applications.
• Metal zippers are prone to corrosion if not properly finished or if exposed to harsh conditions, which can affect their longevity and function.

Zipper Size

#10= Chain size, or coil width (8mm in this case)

Zippers for Specialized Environments

• Marine environment: In saltwater and marine environments, such as boat covers, corrosion resistance is crucial. Plastic zippers with polyester tape stand out in these conditions. Their plastic teeth withstand saltwater damage and the polyester repels moisture, making them perfect for exposure to ocean air and water.
• Outdoor environment: For tents and gear in extreme conditions, choose zippers that withstand temperature changes and moisture. Nylon coil zippers are flexible and resist rain, wind, snow, and UV rays. Their tight coil design keeps moisture and debris out.
• Industrial uses: In heavy industrial applications like equipment covers, metal zippers offer the durability needed for frequent use and abrasion. Stainless steel teeth resist corrosion and keep their shape under pressure.

How to fix every zipper issue?

When a zipper won't close or keeps popping open, it can be due to several issues. Here are some common problems and potential solutions:

• Misaligned Teeth
• Problem: The teeth of the zipper are not aligning correctly, causing it to not close properly or pop open.
• Solution: Gently realign the teeth with your fingers or a pair of pliers. Ensure both sides of the zipper tape are even before attempting to zip it up.
• Worn-out Slider
• Problem: The slider has become worn or stretched out, losing its grip on the zipper teeth, leading to closure issues.
• Solution: Use a pair of pliers to gently squeeze the slider back into shape so it can properly engage the teeth. Be careful not to apply too much pressure, as this could damage the slider. If the slider is too worn, it may need to be replaced.
• Broken or Missing Teeth
• Problem: If teeth are missing or damaged, the zipper won't close correctly or may keep popping open.
• Solution: Inspect the zipper for any damaged or missing teeth. A zipper with missing or damaged teeth often needs to be replaced, but a temporary fix can sometimes be achieved by sewing over the gap to create a barrier.
• Obstructions
• Problem: Dirt, fabric, or threads caught in the zipper can prevent it from closing properly.
• Solution: Inspect the zipper for any obstructions and carefully remove any debris. A lubricant like graphite or soap can be applied to help the zipper move smoothly.
• Lubrication Issue
• Problem: The zipper may not be closing smoothly due to lack of lubrication.
• Solution: Apply a zipper lubricant, candle wax, or graphite pencil to the teeth to help the slider move more easily.