Popular Types of Bottle Cap Liners in Market
The most popular types of bottle cap liners are: foam liners, pulp and poly liners, pulp and foil liners, plastisol liners, and induction liners. Foam liners are made of materials such as polyethylene (PE) or F217. Pulp and poly liners are made of two layers of material: pulp (cardboard-like material) and polyvinyl chloride (PVC). The pulp layer faces the cap, while the PVC layer faces the product. Pulp and foil liners are similar to pulp and poly liners, but the product-facing layer is made of foil instead of PVC. Plastisol liners are made of a soft, PVC-based material, and make an effective seal with the lip of a bottle. Induction liners are made of multiple layers of material, including foil, pulpboard, wax, and a polymer coating.
Choosing the Right Type of Bottle Cap Liner
The best types of bottle cap liners for a particular application will depend on the type of product being packaged, the required shelf life, and the desired level of protection. For example, foam liners are a good choice for inexpensive liquid products with a short shelf life. Pulp and poly liners are a good choice for more expensive liquid products or products that need to be protected from a variety of chemicals. Pulp and foil liners are a good choice for solid and powdered products that need to be protected from moisture and other environmental factors. Plastisol liners are a good choice for glass bottles and jars that need a hermetic seal. Induction liners are a good choice for food and beverage products that need excellent tamper evidence and shelf-life extension.
Customization Options in Bottle Cap Liners
In addition to choosing the right types of bottle cap liners for your product, you can also customize the liner in a number of ways. Some common customization options include:
- Size: Bottle cap liners come in a variety of sizes to fit different cap and container openings.
- Thickness: The thickness of the liner can be customized to provide the desired level of protection.
- Material: The liner can be made from a variety of materials, including foam, pulp and poly, pulp and foil, plastisol, and induction liners.
- Color: The liner can be colored to match the cap and container, or to create a unique branding opportunity.
- Printing: The liner can be printed with custom logos, text, and graphics.
Some manufacturers also offer more specialized customization options, such as:
- Perforation: The liner can be perforated to make it easier to open.
- Venting: The liner can be vented to allow for gas exchange.
- Tamper evidence: The liner can be designed to provide tamper evidence, such as a tamper band or seal.
- Child resistance: The liner can be designed to be child resistant, such as a push-and-turn cap.
How Different Cap Liners Impact Sealing Performance
The type of liner material, the thickness of the liner, and the compatibility of the liner with the cap and container all play a role in how well the liner will seal. Thicker liners will generally provide a better seal than thinner liners. However, it’s important to choose the right liner thickness for the specific product and application. A liner that is too thick may be difficult to apply, while a liner that is too thin may not provide adequate protection. When it comes to liner material and compatibility, some may react with certain chemicals or solvents, so be sure to choose a material that will not have any adverse effects on the product’s integrity and safety.
ILT’s Selection of Cap Liners
ILT currently offers several cap liner products. Our septa come in a variety of sizes and materials, and can be customized to your product’s needs. ILT’s products are used and trusted by the Chromatography, Headspace, Environmental, Chemical Packaging, and Clinical Diagnostic industries. View our product catalog here.
Read more about the seals and septa industry on our blog page or learn more about ILT, the world leader in manufacturing seals and septa here.
