Quality closures start long before they leave the production line. At Plastic Closures Ltd, our commitment to world-class manufacturing techniques ensures that every cap, lid, handle, and component we produce meets the highest standards of precision, durability, and safety.

Here’s what goes on behind the scenes at our Warrington facility.

Advanced Injection Molding
Our state-of-the-art injection moulding machines allow us to manufacture plastic closures with incredible accuracy and consistency. By investing in cutting-edge machinery and automation, we’re able to deliver high-quality components with minimal variation — no matter the scale of your order.

From simple push fit caps to complex, multi-part closures, every item we manufacture is produced with strict process control to ensure optimal fit, finish, and performance.

In-Line Quality Control
Quality isn’t just checked at the end — it’s built into every stage. Our in-line quality control systems monitor critical dimensions and attributes during production. Visual inspection, pressure testing, and tamper-evidence validation are just some of the methods we use to guarantee that every closure leaving our facility meets exact specifications.

This approach reduces defects, speeds up production times, and ultimately results in a more reliable product for you and your customers.

What is a Child-Resistant Closure?
Child-resistant (CR) closures are specially designed to prevent young children from opening containers containing hazardous or harmful substances. At the same time, they must remain accessible to adults and the elderly. These closures are crucial for products such as medicines, cleaning chemicals, garden products, and automotive fluids.

In the UK and Europe, child-resistant packaging must meet the requirements of ISO 8317, the internationally recognised standard for reclosable child-resistant packaging. Products that fail to comply can risk enforcement action under UK consumer protection and chemical safety laws. Using ISO 8317-certified closures helps ensure legal compliance, reduces risk, and demonstrates a brand’s commitment to safety.

Why These Features Matter
Today’s consumers are more aware than ever of product safety. They expect clear evidence of integrity and trust brands that take extra steps to protect them. Implementing tamper-evident and child-resistant solutions is not just a regulatory necessity — it’s a powerful brand statement about quality, responsibility, and care.

At Plastic Closures, we offer a comprehensive range of tamper-evident and child-resistant closures, including bespoke solutions tailored to specific packaging needs. Every closure is engineered for ease of use, reliable performance, and full compliance with applicable standards.