Frequently asked questions

What does Carmo manufacture?

We design and manufacture highly specialized quality components for use in industrial and medico applications. We are world leaders in weldable eyelets, in valves and in fittings for medical bags.


What is HF Welding?

HF stands for High Frequency, which is energy that is created by the equipment to weld specific types of thermoplastics. HF excites the molecular structure of the material causing it to heat very rapidly. Once heated, a die which is forced into the material by a press determines the final shape and characteristics of the finished product. HF welding is sometimes referred to as RF welding or Radio Frequency Welding.
Read more here…


What types of materials can be welded by this process?

The most common materials are polyvinylchloride (PVC), and urethane. Other materials such as EVA, PET-G and a number of types of formulations in the PET family are also welded with great success using this method. Additionally, a number of adhesives which are activated by HF can be used to weld materials that are not normally considered compatible with this process. An example would be sealing either cardboard to cardboard or thermoformed blisters to cardboard as would be the process in a packaging application.


Why PVC … Isn’t it hazardous and dying out?

Carmo is working proactively to ensure sustainable use of PVC. We are working to completely phase out DEHP plasticizers and are actively experimenting with new – and even organic plasticizers. We only source raw materials from accredited and certified suppliers and all our raw materials pass through quality inspection. We are actively involved in initiatives to promote the recycling of PVC, like the Texiloop program by foil producer Ferari.

PVC is a fantastic product. It is relatively cheap, requires less raw-oil than other polymers, and its molecular structure allows it to be blended and tailored for very specific properties and applications. This has enabled the PVC industry to respond to the commercial and technical needs of many market sectors PVC continues to be the most widely used polymer in the world.
The chemistry of PVC has been understood since the end of the last century. The plastic was first commercially produced in Europe in the 1930s and in the past 60 years it has undergone continuous development and improvement.
During the 1990’s PVC was under intense scrutiny and pressure. 3 areas where of primary concern: Toxic materials generated during the production of the raw material, Plasticisers used to soften the PVC and dioxins generated by non-optimal incineration. (See here for more in-depth discussion)
PVC’s adaptability has also allowed the industry to respond to the environmental issues and find new solutions.
Today, PVC is probably the world’s most researched plastic/polymer and manufacturing methods are very closely regulated


Do you use plasticizers?

Plasticizers are needed when working in PVC which is an inherently stiff material. We work actively to introduce new and sustainable plasticizers. Many of our PVC products are DEHP-free (and the list is growing) and we only use raw materials supplied by global accredited vendors. All incoming raw-material pass though quality inspecti


Why are you producing in Denmark and not sourcing from lower cost areas?

We produce in Denmark out of an active choice to do so. Our production is highly automated and thus the savings potential from moving production to geographies is relatively low. Producing in Denmark also gives us full control of our quality, traceability and the ability to react instantly to market demands. All in all we believe we can offer comparable prices, better products, service and customer experience operating from Denmark.


Do you provide samples?We are very happy to provide both samples and advice to help you evaluate our products and get your project going. Please contact our sales team directly to discuss you specific needs.


Do you have a minimum order quantity?

In principle we do not have a minimum ordering quantity. Although we have standard shipping sizes, we are happy to ship the quantities you desire. If the operation requires extensive manual handling, we will charge you a handling fee.


Where do you ship to?

We presently ship to any location in the world.


I am interested in buying equipment but my knowledge of HF / RF welding is limited. How can Carmo help me make the right equipment choice?

Our Sales and Engineering staff have over 100 years of combined experience in the field of HF welding and its associated technologies. This experience allows us to pinpoint which equipment best fits our customers needs. Our sales and engineering staff team with each other to ensure continuity of design and production capabilities to fit the specific application. At the end of the process, our customers come away from the experience feeling more knowledgeable about the equipment choice that they made and confident in its ability to meet their production requirements.


Can I tour your facility?

We encourage potential customers to visit our facilities. We have a great deal of services which we can offer and we believe it is the best way to learn more about us and better understand what we can do for you and your company. We also believe that the most important aspect of any visit is the opportunity to meet our people who are the real strength of our company.


Can you build prototype equipment and components for special projects?

Yes, we frequently work with many companies on prototype programs.


What types of payment do you accept?

We accept company checks, wire transfers, and letters of credit.