World's largest private-label manufacturer of clear aligners with 3D printing and thermoforming across eight production sites.
K Line Europe GmbH
Düsseldorf (HQ) · Chaves (PT) · Memphis (US) · Florida (US) · Tijuana (MX) · São Paulo (BR) · Cairo (EG) · VietnamNew on Amplifa
About K Line
K Line Europe GmbH is an OEM and private-label manufacturer based in Düsseldorf specializing in clear aligners. Founded in 2014 in Dortmund, the company produces transparent dental splints for orthodontic practices, dental laboratories, aligner brands and Dental Service Organizations without their own factory. The value chain includes digital treatment planning by orthodontists, 3D printing of the aligner models with 70 micrometer printing precision, thermoforming of multilayer polymer films, quality assurance as well as packaging and global logistics under the customer's brand. Production is carried out from PETG, TPU and PETG/TPU hybrids in multilayer construction. Daily capacity exceeds 25,000 aligners; to date, more than 8.5 million aligners have been delivered for over 150 brands in more than 40 countries. In addition to its headquarters at the 3,000-m² plant in SEGRO Park Düsseldorf Süd, K Line operates production sites in Portugal, the USA, Mexico, Brazil, Egypt and Vietnam.
- Site
- Düsseldorf
- Processes
- Orthodontic treatment planning (digital setup, clinical approval), 3D printing of aligner models (precision printing at 70 micrometers), Thermoforming of clear aligners (multilayer technology), Private-label production of clear aligners including packaging and logistics (3-day production), Quality inspection and final control (Precision-certified aligners), Private-label/OEM aligner manufacturing, 3D printing and thermoforming, Treatment planning by orthodontists
- Materials
- PETG, TPU (thermoplastic polyurethane), Polymer blends (PETG/TPU hybrids), Multilayer polymer materials, Shape memory polymers (SMP), Thermoplastic polymers (general, for 3D printing), Thermoplastic polyurethane (TPU)
- Certificates
- EN ISO 13485, FDA 510(k) / FDA registration, MHRA, TGA, MDR, FDA 510(k), MHRA (UK), TGA (Australia)
- Founded
- 2014
- Employees
- 450+
- Industries
- Orthodontics / Dental, Dental laboratories, Aligner brands / OEM, DSOs (Dental Service Organizations), Dental laboratories
- 01
Scan upload via Doctor Portal
- 02
Treatment planning by orthodontists
- 03
3D printing of the aligner models (70 µm precision)
- 04
Thermoforming of the aligners (multilayer technology)
- 05
Quality inspection / final control
- 06
Private-label packaging
- 07
Logistics and worldwide shipping
Materials & Processes
PETG
Transparent, stiff thermoplastic for aligner splints with good clarity.
Thermoplastic polyurethane (TPU)
Elastic material that adapts better to undercuts and improves comfort and fit.
Polymer blends (PETG/TPU hybrids)
Hybrids that combine stiffness and elasticity and deliver more stable force delivery.
Multilayer polymer materials
Layered polymers for more consistent forces over time and slower force decay.
Shape memory polymers (SMP)
Programmable polymers with switching segments that can represent multiple movement phases per appliance.
Locations
Düsseldorf
DEHQ and production site
- Lot size
- no minimum order quantity
- Materials
- PETG, TPU, multilayer polymers
- 3D printers for aligner models (70 µm)
- Thermoforming machines
Chaves
PTProduction site (expanded and renovated in 2024)
- Materials
- PETG, TPU, multilayer polymers
- 3D printers for aligner models
- Thermoforming machines
Memphis
USProduction site
- Materials
- PETG, TPU, multilayer polymers
- 3D printers for aligner models
- Thermoforming machines
Florida
USProduction site (opened in 2025)
- Materials
- PETG, TPU, multilayer polymers
- 3D printers for aligner models
- Thermoforming machines
Tijuana
MXProduction site (opened in 2024)
- Materials
- PETG, TPU, multilayer polymers
- 3D printers for aligner models
- Thermoforming machines
São Paulo
BRProduction site
- Materials
- PETG, TPU, multilayer polymers
- 3D printers for aligner models
- Thermoforming machines
Cairo
EGProduction site in free trade zone (K Line Middle East)
- Materials
- PETG, TPU, multilayer polymers
- 3D printers for aligner models
- Thermoforming machines
Vietnam
VNProduction site (opened in 2024)
- Materials
- PETG, TPU, multilayer polymers
- 3D printers for aligner models
- Thermoforming machines
Products
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Orthodontic treatment planning (digital setup, clinical approval)Engineering | – | – | – | – | – |
| 3D printing of aligner models (precision printing at 70 micrometers)Additive | – | – | – | – | Thermoplastic polymers |
| Thermoforming of clear aligners (multilayer technology)Plastics | 70 micrometer printing precision | – | – | – | PETG, TPU, Polymer blends (PETG/TPU), Multilayer polymers, Shape memory polymers (SMP) |
| Private-label production of clear aligners including packaging and logistics (3-day production)Assembly | – | – | – | no minimum order quantity | Multilayer thermoplastic polymers |
| Quality inspection and final control (Precision-certified aligners)Testing | – | – | – | – | – |
2 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| 3D printers for aligner models (precision printing 70 µm) | – | – | – | – | Düsseldorf, Germany; Chaves, Portugal; Memphis & Florida, USA; Tijuana, |
| Thermoforming machines for clear aligners | – | – | – | – | Düsseldorf, Germany; Chaves, Portugal; Memphis & Florida, USA; Tijuana, |
Additional services
Reference customers
Quality & Certifications
Every aligner undergoes a quality inspection and final control as a Precision-certified aligner. Production follows EN ISO 13485 with FDA 510(k) clearance, MHRA and TGA certification as well as MDR compliance.
| Evidence | Düsseldorf | Chaves | Memphis | Florida | Tijuana | São Paulo | Cairo | Vietnam |
|---|---|---|---|---|---|---|---|---|
| EN ISO 13485 | ||||||||
| FDA 510(k) | ||||||||
| MDR | ||||||||
| MHRA (UK) | ||||||||
| TGA (Australia) |
History
- 2014
K Line founded in Dortmund.
- 2015
First production facility opened in Düsseldorf.
- 2016
Entry into the aligner market.
- 2017
Sales network grows to over 20 countries.
- 2018
Nominated for the NRW Founders' Award; over 2,000 doctors prescribe K Clear Aligner.
- 2019
Patent filed for ClearX 4D technology.
- 2020
Introduction of the private-label business model.
- 2021
More than 2 million aligners produced; one of the largest private-label providers in Europe.
- 2022
Capacity increased to 6 million aligners per year; relocation to a 3,000-m² plant in SEGRO Park Düsseldorf Süd; EN ISO 13485 certification and FDA clearance.
- 2023
MHRA certification (UK); recognized as the world's largest OEM manufacturer of private-label aligners.
- 2024
Plants in Tijuana (Mexico) and Vietnam opened; Portugal plant expanded and renovated; OEM partnership with 3D Predict.
- 2025
Plant in Florida (USA) opened; daily capacity 13,000 aligners; introduction of the ACMS (Aligner Co-Manufacturing System); TGA certification.