Types Of Closure In Packaging

Closure in packaging plays a vital role in any container by ensuring the product remains safe, fresh, and secure from contamination. They come in a wide range of styles, and each one has its own features and function. In this blog, you will learn about various types of closures used in the packaging industry, helping you understand their difference.

A closure refers to a component used to seal or close a packaging structure, preventing leakage or spoilage and often helping to preserve product integrity.

All of its types, including continuous thread, lug cap, tamper-evident cap, pumps, and twist top ones, have their uses and aesthetic value. Each type is selected based on product quality, convenience, security needs, and requirements. Let’s understand them one by one:

Screw cap

They are commonly used across many industries, including food and beverages, cosmetics, pharmaceuticals, and chemicals. A screw cap design is usually made from metal and plastic material in a cylindrical shape with an internal thread that engages the matching threads on the top of bottles or jars when twisted on. This type has been known for its airtight seal nature that prevents leaks and contamination from entering, and has a user-friendly structure to open and close.

Features

• Can be made from metal and plastic
• Reusable
• Easy to open
• Suitable for a wide range of products
• Can include liners for superior protection

Lug cap

A lug cap closure is defined as a quick twist metal lid designed for glass jars. It locks the quality, aroma and taste in its place with a quarter turn and forms an airtight vacuum seal. A lug cap sealer often used for edibles like jams, pickles, and sauces, where a hermetic seal is required for preservation for an extended period.

Features

• Vacuum-tight seal
• Often used in jars
• Twist and seal motion
• Require less action to seal and unseal

Pumps

A pump closure is usually used for liquid or semi-solid liquids on top of a bottle or jar that allows to dispense it with manual dispensing mechanisms. An ideal solution for controlled dispensing through a nozzle and mess-free access to the content, both in personal care and industrial applications.

Features

• Common in lotion, moisturiser, and skincare products
• Controlled dispensing
• Operate by pressing down on the pump head

Twist top

It usually operates by twisting the top to open or close it, without the need to remove the full cap. Unlike a screw top, it features a built-in nozzle or spout on top that allows controlled dispensing, helping to reduce mess and waste. It is a resealable closure system that can be manufactured with bio-plastics, aiming at brands which are looking for sustainable seal practice. Commonly found on products like condiments, creams, and gels.

Features

• Screw-on design
• Reselable
• Suitable for non-pressureized products

Bar top closure

A premium non-threaded closure system typically used in alcoholic beverages like vodka, rum, whiskey, or speciality vinegars. It features a two-part one is a stopper that is usually made from synthetic material attached to a decorative cap. Operate simply by pulling it up or down into the neck of the bottle to create a snug fit. No twisting and unscrewing required.

Features

• Commonly used on liquor items
• Consists of a cork or a synthetic stopper
• Easy to remove
• Moderate tight seal

Child resistance cap

A child-resistant cap, often abbreviated to CRC, is a safe closure mechanism to prevent children from opening containers that hold potentially harmful chemicals or dangerous goods such as medicines, pesticides, and cleaning products. It usually requires a two-step action to open, such as:

• Push down and turn
• Squeeze and turn
• Align with the arrow and pull

Features

• Require specific action
• Prevent child access
• Compliance with safety regulations

Tamper-evident closure

They are designed to show the evidence of tampering or opening, often feature a removable or breakable seal, such as a broken band, torn label and are used for products that require extra security, like pharmaceutical and food products. A Tamper-evident closure main purpose is to gain customer trust by making any tampering signs obvious.

Features

• Show a visible sign if open and tampered with
• Gain customer trust
• Increase product safety
• Available in plastic and metal

Crown cap

A crown cap, also known as a crown cork closure type that is made from metal material and crimped into the neck of bottles. They have been widely used in the beverage industry and popular choice for carbonated drinks such as beer, soda, and soft drinks to ensure a tight seal and prevent leakage.

Features

• Metal cap with crimped edge
• Mainly used on glass bottles
• Require a bottle opener
• Maintain frriziness

Dome cap

A type of bottle or container closure system that is named after its shape resembles a dome-like structure. Usually made from plastic material and is designed to screw onto the top of enclosures. It serves both functional and aesthetic benefits by providing a secure seal while also providing a sleek, modern look. Dome cap screws are often used on beauty products and can be paired with a pump or flip-top to facilitate controlled dispensing.

Features

• Dome-shaped structure
• Ergonomic design
• Aesthetic presentation

Roll-on

Commonly made from plastic or metal material, and is designed to be formed directly on top of the bottles during the capping process. A roll-on closure example is cosmetic products and the pharmaceutical industry, to create a secure and leak-proof closure system.

Features

• Lightweight
• Leak-proof
• Can incorporate a tamper-evident band

Phenolic polycone caps

A type in which a polycone liner is fitted inside phenolic polycone caps, a type of bottle closure made from phenolic resin plastic. These caps are known for their remarkable resistance to chemicals, heat tolerance, and capacity to form a tight and impermeable seal. When the cap is tightened, the polycone inside compresses against the bottle necks, creating an airtight seal, making it perfect for contamination-sensitive liquids.

Features

• Durable phenolic resin
• Ideal for aggressive liquids
• Chemical resistance
• Odour and flavour barrier

Sprayers

A dispensing system used to deliver liquids in a fine mist form. It consists of a trigger pump, a dip tube that reaches to the end of the bottle, and a nozzle that controls the spray pattern. When a pump is pressured, it draws the liquid up through the dip tube and forces it out through the nozzle as a spray. They are commonly used for household items, hair products, and gardening sprays.

Features

• Controlled dispensing
• Hygienic
• Can feature twist-lock or snap closure
• Leakproof
• Refillable

Conclusion

Ultimately, it concludes that there is a wide range of closure types out there, and each one has its own application and uses. After reading their features, we’re sure that you now know what will work best for your product, while ensuring unique presentation, safety, and convenience. Feel free to modify packaging closure types according to your product needs and requirements.