Liberty Security

Security Sewing Thread

Fields of application

  • Passports
  • Brand protection


Security Sewing Threads

Liberty Threads has been developing and producing high quality sewing threads for industrial applications and markets such as apparel, footwear, bedding, saddlery and leather goods, marine and automotive since the late 1960s.  The experience and knowledge gained over these 60+ years means that at Liberty Threads, we understand thread and how to make it, ensuring that it meets our customers’ needs every time.

15 years ago we decided to leverage this extensive expertise to enter into the security thread market.  By taking the high quality thread that we had perfected over the previous years, and combining it with industry-leading security features and mechanisms, we assembled a comprehensive product portfolio that enabled Liberty Security Threads to quickly establish itself as a leading player in this highly specialised area.

Alongside building the product portfolio, at the same time we also developed and enhanced our production system and process, so that we can easily accommodate everything from small sample requests (with a quick turnaround time – very useful for customers wishing to evaluate new designs or test our products) to very large scale production runs (with tailored lead-times to fit in with customer demand timeframes).

So, thanks to our heritage, our product range and our manufacturing flexibility, we believe that Liberty Security Threads is the right choice for your secure document binding requirements.



Since both passports and other secure documents are held together with binding thread, it makes logical sense to add security features to this thread in order to make the finished document even more secure.   The thread ends up performing 2 tasks: holding the document together and contributing to the security and integrity of the document.

Over the past 15 years, Liberty Security Threads is proud to have been selected as the security sewing thread supplier by numerous countries, governments, passport producers and agents around the world.  And as we head out of the Covid-19 pandemic and the world starts to travel freely again, we hope to win many more customers in the future.



We understand that security is a key customer requirement in certain markets and applications.

Our extensive range of security features includes:

  • industry-standard substrate materials that are highly abrasion and friction resistant, such as polyamide (nylon).  This is especially important in the case of e-passports, where the increased use of polycarbonate data pages can abrade inferior thread materials, causing them to break.
  • special ply twisting that creates a tamper-evident thread which cannot be unpicked and re-used without visual indication.  Secure documents such as passports are compromised if pages can be substituted without detection, so our specially twisted thread will always reveal instances of interference.
  • a range of UV reactive pigments that can be one colour in normal light, and a different colour under UV light.  Most countries specify certain colour combinations in their passport design, and our portfolio covers all possible configurations.
  • infra-red and other specialised taggants that can be attached to the thread and detected by appropriate readers.  The adoption of these types of features is offered in inks and paper inclusions but less common in sewing threads; Liberty Security Threads has invested in them at an early stage to ensure that we are already able to offer them as part of the security portfolio.


Aside from the secure document arena, sewing threads enhanced with security features can also be an important component in brand protection and product compliance solutions. 

For brand protection solutions, the use of security thread within the product can help brand owners to eliminate copies and counterfeits and safeguard genuine products.  While in certain industries, the use of approved or mandatory products can be enforced and policed via the adoption of security threads within the relevant products.


For more information on Liberty Security Thread’s range of security and brand protection threads, and/or to learn more about how Liberty Security Threads could benefit your business or organisation, please Contact us for more information. 


Liberty Quality

The selection of our raw materials is the basis of the quality of all our products. By developing long-term partnerships with our yarn and material suppliers we are able to guarantee the use of unique and superior materials. Our manufacturing processes are of the highest standards and constantly governed by benchmarks. Our aim is achieving the highest levels of performance in order to meet the needs of our customers.