ROTFELD Consulting GmbH & Co. KG – NEWS

05.2024 DIPRO®flex Thermoplastic Elastomers

DIPRO®mat presents a complete series of Thermoplastic Elastomers with the following special features

  • TPE masterbatch for producing your own recipes on the injection molding machine
  • low-compression set grades starting at 3 ShA
  • haptic-optimized, filled and unfilled, high and ultra-high molecular weight TPS elastomers
  • damping polymers for protective clothing (protectors) and vibration damping
  • bonding grades for PA, PPB, PC, PC-ABS, ABS
  • extrusion grades in the Shore A/D range for hoses and flexible pipes
  • completely new hard/soft combinations with DIPRO®blend H
  • DIPRO®flex for 3D printing, also for printed hard/soft combinations

Source: DIPROmat

Seal carrier with cable grommets

Cable grommets (natural/light):

DIPRO®flex S Thermoplastic Elastomer, 50 ShA, with polyamide adhesion

Product ID 1173, PX-DIPRO®flex S50H23B2/1230*702/0201

Housing component (black):

PA 30 % GF

04.2024 Radiation-Crosslinkable Polymers for Injection Molding and Extrusion

Properties after radiation-crosslinking

  • no longer meltable after crosslinking with E-Beam
  • reduced creep behavior under load
  • increased Tg (glass transition temperature) to >100 °C
  • reduced abrasion for bearings and gears
  • radiation cross-linked parts have a memory effect
  • improved chemical resistance
  • lower water absorption
  • higher surface hardness

Source: DIPROmat / BGS

04.2024 Hard/Soft Connection, FFF/FDM Printing

Source: DIPROmat

Housing with seal

Housing component (black):

High-Performance Polyolefin, ultra-tough, 25 % GF

Product ID 1492, DIPRO®blend H3GF5H1Z34*9200F

Sealing component (red):

Thermoplastic Elastomer, 80 Sh A

Product ID 1597, DIPRO®flex S80H2/1300*702F

03.2024 Super Surface with DIPRO®blend H GF 15 % – Filament Printing

Source: DIPROmat

Product ID 1443, DIPRO®blend H3GF3H1Z44*9200F – housing material for very robust applications

  • low molding shrinkage
  • little warpage
  • ultra-tough despite 15 % glass fiber reinforcement
  • heat deflection temperature HDT / B = 134 °C
  • processing without pre-drying

11.2023 Hard/Soft Combination, FDM Printing

Hard/soft combinations with co-recyclable products can now also be printed using the FDM/FFF or pellet printing process!

A very valuable feature, especially with filament printing, is that the spools do not have to be pre-dried.

These hard/soft combinations are also easy to produce in larger quantities using injection molding.

Source: GRAUTS

Garden chair or appliance base

  • Black: DIPRO®blend H GF 25 %
  • Blue: DIPRO®flex S90

11.2023 DIPRO®blend H 20 % Mineral MT

Source: DIPROmat

Product ID 1832, DIPRO®blend H3MT4H1Z24*800F

  • super surface
  • isotropic shrinkage
  • impact resistant
  • can be colored as desired

11.2023 ARBURG-FORMNEXT Presentation / DIPRO®mid on FREEFORMER

Bicycle tire lever made of DIPRO®mid H GF 25 % for changing bicycle tires

  • low-warpage precision polyamide
  • little influence of moisture on part properties
  • high strength
  • high rigidity
  • easily transferable to injection molding

10.2023 DIPRO®blend H with and without Glass Fiber Reinforcement / Filament Pressure

Source: Rheneon

Housing, medium stiffness, ultra-tough

  • very good layer adhesion
  • low mold shrinkage
  • easy to process without drying
  • low density
  • no stress crack sensitivity
  • acid and alkali resistant

Lid, 25 % GF reinforcement

  • high stiffness Et = 4.500 Mpa
  • low warpage for high precision parts
  • high strength pmd

09.2023 Whether Flower Vase, Car Bumper or Technical Housing  –  EVERYTHING 3D Printed!

Source: DIPROmat

We like to use these vases to evaluate printability, layer adhesion and haptics. Shown here with a wall thickness of only 0.4 mm.

All polymers shown in these 3 vases look similar, but differ significantly from each other.

1) Vase large
– Product ID 1633, PX-DIPRO®blend H3.1H1Z64*700F, or Product ID 1864, PX-DIPRO®blend H3H2Z14*601EX –

Depending on the stiffness requirement, this demonstrator was made of DIPRO®blend H product ID 1633, PX-DIPRO®blend H3.1H1Z64*700F, or product ID 1864, PX-DIPROblend H3H2Z14*601EX. These two unreinforced and ultra-tough polymers have an Et Modulus of 856 MPa to 1,050 MPa and are virtually indestructible due to ultra-tough impact and notched impact properties.

2) Vase center
– Product ID 1832, PX-DIPRO®blend H3MT4H1Z24*800F –

In order to further increase the stiffness, 20 % mineral type “MT” was used for product ID 1832, PX-DIPRO®blend H3MT4H1Z24*800F. Now a housing material with Et Modulus of 1,520 MPa is available with high impact strength and still good notched impact strength. The surface finish is excellent.

3) Vase on the right
– Product ID 1831, PX-DIPRO®blend H3MTGF42H1Z24*800F –

For some housings, the above-mentioned stiffness is not yet sufficient, which is why Product ID 1831, PX-DIPRO®blend H3MTGF42H1Z24*800F, was developed as a housing grade with 20% mineral type “MT” and 10% special glass fiber for low-cost housing materials. The Et Modulus is now 3,030 MPa.

In addition to this group of polymers, 10 – 25% specialty glass fiber polymers are available up to 4,500 MPa tensile modulus.

09.2023 DIPRO®flex S90.1H2/1300*700F, Product ID 1634 – Thermoplastic Elastomer for Filament Printing up to 120 °C (HSBC)

Source: GRAUTS

Ultra-high molecular weight TPS for highest demands

  • hardness 91 ShA / 32 ShD
  • 30 % lighter than TPU
  • extremely good layer adhesion
  • application temperature up to 120 °C
  • no polymer degradation due to moisture
  • no predrying of the filament spool
  • hard/soft combinations possible with DIPRO®blend-H
  • easy to recycle with all polyolefins
  • all colors are possible
  • UV-resistant
  • hydrolysis, acid and alkali resistant
  • non-slip surface
  • elongation at break md/pmd = 600%/ 800%

08.2023 Market Launch of DIPRO®blend H3.1H1Z64*700F, Product ID 1633 – an ULTRA-TOUGH HOUSING MATERIAL!

Source: GRAUTS

High-Performance Polyolefin, unreinforced, for filament and pellet printers

  • Et Modulus = 856 Mpa
  • tensile strength at break = 30 Mpa
  • Charpy k = 87
  • Charpy = N.B.
  • elongation at break = 500 %
  • VICAT, 10 N = 108 °C
  • no pre-drying of pellets and spools

These are the facts for an almost indestructible housing material of medium stiffness for robust applications.

The part shown has 0.4 mm wall thickness and demonstrates the extreme flexibility and toughness.

An ideal material for automotive parts, power tool industry, and sports and leisure applications.

Stiffer and softer DIPRO®blend H grades are available.

08.2023 DIPRO®blend H High-Performance Polyolefin 15 % GF (Special Glass Fiber Reinforcement), Ultra-Tough

Source: DIPROmat

Car storage tray for cell phone, cables and more

This material was chosen for automotive interior applications for the following reasons:

  • medium stiffness
  • extreme high notched impact strength
  • heat deflection temperature HDT-B of 134 °C
  • good heat aging behavior
  • low material density of 1.01 g/cm³
  • low part density due INFILL of 0.75 g/cm³
  • easy to print
  • no pre-drying of the filament spool
  • high absorption, no tendency to rattle
  • matt black surface

07.2023 Minimal Mold Shrinkage (0.1%/0.1% – MD/PMD), High Strength (153 /147 MPa – Dry/Conditioned), Stiffness (11,100 / 9,700 MPa – Dry/Conditioned) and Heat Deflection Temperature (HDT-B=200 °C) with Simultaneous ESD (Electrostatic Discharge) Properties Enable Forward-Looking Applications in FDM/FFF 3D Printing.

Filament PA + 15 % CF from, Model:

01.2023 DIPRO®blend H and DIPRO®flex High-Performance Polyolefins with Minimal Mold Shrinkage for High Precision

Together with ROTFELD-Consulting, DIPRO®mat has been able to develop a range of unreinforced and special glass fiber-reinforced high-performance polyolefins (patent pending) that exhibit hardly any shrinkage, are incredibly tough and – unlike conventional impact-modified PPs – do not lose any heat distortion temperature, since a blend component provides a Tg (glass transition temperature) of 160°C.

Source: GRAUTS

This results in polyolefin compounds with high precision available for injection molding and 3D printing. An exciting fact is that the development started in additive manufacturing, where a large warpage is useless, and now returned to injection molding applications.

12.2022 First Processing with Adaptive IR Zone Heating System (FFF/FDM Printing)

The equally smooth surface coupled with high strength in the build-up direction was achieved with Apium’s patented IR zone heating system. In this process, only the uppermost layers are melted so that there is a high level of layer bonding. In the meantime, the lower layers can cool down without any further thermal influence on the surface quality.

11.2022 First Production with DIPRO®mid Carbon Fiber on High-Speed Pellet Printer

Machine operating lever, DIPRO®mid 15 % carbon

Machine operating lever

  • Printing speed up to 600mm/s

Source: GRAUTS

11.2022 Extension of the ROTFELD Network by the Companies Q.BIG 3D GmbH, LuxYours GmbH and Grauts GmbH.

Successful network meeting with 11 diverse companies from the industrial sectors mobility, electrical, 3D machine manufacturers (pellet and filament printing FFF/FDM, VFGM, AKF), chemical smoothing, AF service providers and institutes.

Presentation of the largest molded part printed to date (Caravan rear end, 210 x 70 x 30 cm) made of DIPRO®mid GF at Q.BIG 3D.

10.2022 Filament / Pellet Printing – Hard/Soft Compound 3D

Simple hard/soft compound

Simple hard/soft compound

  • made on Tumaker 3D printer (filament and pellets)
  • Hard: Filament printing / Material: DIPRO®blend GF 15 %
  • Soft: Pellet print / Material: DIPRO®flex S60H24
  • available as of 1st quarter 2023

09.2022 Development of PRECISION Polyamide for Flame Retardant (Injection Molding and 3D Printing) & Halogen-free DIPRO®flex FR, 75 ShA and Above.

09.2022 In the Past Year a Variety of Compounds for Injection Molding and Additive Manufacturing, Including Radiation Crosslinkable Polymers, Were Developed for the Production Company DIPROmat GmbH

Please visit (TECH-NEWS) for more information.

08.2022 Flexible Structure Made of DIPRO®flex for Pellet and Filament Printing, Up to 120 °C, Flexible, Super Bonding Strength for Flexible Three-Dimensional Structures

Flex structure

Flex structure

filament print from DIPRO®flex, 90 ShA

  • good reset behavior
  • temperature up to 120 °C
  • can be colored as desired
  • no pre-drying necessary

Source: GRAUTS

07.2022 Filaments by Network Partners with CARBON and GLAS Fiber Reinforcement with Extremely Low Shrinkage

Cooling nozzle

filament print made of DIPRO®mid 25 % GF

Source: GRAUTS

Sports bike bottle holder

filament print from DIPRO®mid 15 % CF 

Source: GRAUTS

Turbine wheel

Turbine wheel

filament print made of DIPRO®mid 15 % GF

Source: GRAUTS

06.2022 TPE Masterbatch Development for In-House Production of TPS with Low Compression Set for Injection Molders & Printable TPE Special Compounds for FFF/FDM/LAAM/VLAAM and Pellet Printers

DIPRO® flex pellet printing

DIPRO®flex pellet printing

Source: Q.Big 3D

05.2022 DIPRO®mid for High-Capacity Pellet Printers VLAAM

Caravan rear end

Source: Q.BIG 3D

Caravan rear end

Precision polyamides with minimal mold shrinkage for high-capacity printers

  • DIPRO®mid 25 % GF
  • Caravan rear end
  • Largest molded part printed to date
  • Dimension: 210 x 70 x 30 cm
  • Co-Founder Q.BIG 3D, Dennis Herrmann

01.2022 Development of Radiation-Crosslinkable DIPRO®mid PRECISION Polyamides for DIPRO®mat


Crosslink tester with switching bridge

Radiation-crosslinkable DIPRO®mid precision polyamides show the following differences compared to conventional PA grades:

  • little warping due to low shrinkage
  • very good surface
  • low influence of air humidity on properties
  • thermostable crosslinking additive, homogeneously compounded, up to 40 %
  • energy efficient due to 35 °C – 40 °C lower melt temperature than PA66
  • maximum 60 % glass fiber reinforcement possible

Source: DIPROmat

08.2021 Product Highlights ETP for Filament and Pellet Printing

Reinforced high-performance PA grades for FFF (filament printers) and FGM (pellet printers)
All FFF-FGM polyamides with glass fiber reinforcement show extremely low mold shrinkage. This is particularly important for large-format printers.

PX-DIPROmid T25.7CH2C3*9200F                     Product-ID: 912             Request data sheet
(semi-aromatic, 15 % carbon fiber, HDT/B=200 °C)

PX-DIPROmid-T25.7CH2GF5*9200F                  Product-ID: 910             Request data sheet
(semi-aromatic, 25 % glass fiber, HDT/B = 200 °C)

PX-DIPROmid HT4.0H6.0GF5*9200F                  Product-ID: 921             Request data sheet
(PPA-25 % glass fiber, low warpage, Tg = 125 °C, HDT/A 215 °C, HDT/B 243 °C)

07.2021 Product Highlights ETP Injection Molding

High stiffness low warpage polyamides (40-60 % glass fiber reinforcement) with aesthetic surface, low warpage
PX-DIPROmid A1H6.1G12T3U*9200                   Product-ID: 807             Request data sheet
PA66 + X, 60 % glass fiber, ultra-flow, 3rd generation partially aromatic PA, extremely good surface, low warpage.
The influence of moisture absorption on the properties is low. This is a typical metal substitute material with aesthetic surface.

PX-DIPROmid C3H6.1GF12T1U*9200                 Produkt-ID: 793             Request data sheet
PA-Copo + X, 62 % glass fiber, partially aromatic, a possible answer to constantly recurring PA66 shortages.
The high modulus aesthetic material exhibits unprecedented low mold shrinkage values (0 % md/0.1 % pmd) and is suitable for dimensionally stable metal replacement applications. The tensile strength of 265 MPa is high, and the processing window is relatively wide.
Mechanical values perpendicular to the fiber are 28-30 % better compared to competitor materials.
High performance polyamides of the same family with 40 % and 50 % glass fiber reinforcement are available.

50 % glass fiber reinforcement, aesthetic surface, low warpage
PX-DIPROmid A2H6.1G10T2U*9200                   Product-ID: 734             Request data sheet

PA66 + X, 50 % glass fiber reinforcement, partially aromatic, low warpage, easy-flow, aesthetic surface
The influence of water absorption on the properties is low. This is a typical metal substitute material for the automotive industry and mechanical engineering.

PX-DIPROmid A2H6.1G10T3U*9200                  Product-ID: 803             Request data sheet
PA66 + X, 50 % glass fiber reinforcement, partially aromatic, very low warpage, easy-flow, aesthetic surface
Compared to Product ID: 734, this high-performance material offers a wider processing window and less warpage.

DIPROmid T50.4H2C3*9200 and DIPROmid TR50.4H2*6000

Source: ROTFELD Consulting
Filament and component from Rheneon

With DIPROmid T50.4H2C3*9200, DIPRO®mat has developed a high-performance material with the following special features:

  • amorphous polyamide with 15 % carbon fiber
  • very high stiffness, tensile modulus = 10.400 MPa
  • very high strength 160 MPa
  • extremely low mold shrinkage of 0 – 0.1 %
  • dimensionally accurate lightweight material
Source: ROTFELD Consulting
Filament and component from Rheneon

Another interesting material is DIPROmid TR50.4H2*6000 transparent.

  • amorphous, transparent polyamide
  • low warpage
  • impact resistant and dimensionally stable
  • can be dyed in brilliant colors as desired
  • The rheology of both products is matched to granulate and FFF printing. 
  • Information on our materials is available from ROTFELD-Consulting GmbH & Co. KG (
  • Information on filament and printability is available from Rheneon GmbH (

The DIPRO®mat team commissioned two highly specialized plants for thermoplastic AM materials (ETP and TPE) and also high-performance compounds for injection molding and extrusion in spring 2021. With a capacity of 1200 t/a, small quantities from 100 kg/batch as well as production quantities in the ton range can be produced for innovative partners.hergestellt werden.

Crosslink tester with switching bridge

07.2021 ROTFELD-Consulting Developed a Wide Range of Highly Reinforced, Aesthetic Polyamides for Its Sister Company DIPROmat GmbH, Most of Which Are Produced with Unprecedented Low Warpage and Without the Currently Very Scarce Polyamide 66 Precursors.

Metal replacement applications with the highest precision are possible.

Two product lines for additive manufacturing (pellet and filament printer) and injection molding applications are available from DIPRO®mat on request. The first DIPRO®mid HT4 PPA filament materials with high Tg, low warpage and minimal water absorption at moderate processing temperature and 25 % glass fiber reinforcement are available on request for FFF/FGM printers.

DIPRO®mat – Materials for Digital Production

The company DIPRO®mat – Materials for Digital Production emerged from the ROTFELD Consulting Network in the first half of 2020 (see network participants list).

Change in the ” Inner ROTFELD-Network ” :

In the founding year 2017/2018, the SKZ “Das Kunststoffzentrum” Würzburg was a member. Since November 2018, NMB “Neue Materialien Bayreuth” has taken its place. Especially the activities in the field AF “Additive Manufacturing” largely coincide with the network activities. The focus is on materials for 3D printing processes with thermoplastics in powder and filament form.

Partner for ” Tribological Applications ” wanted.

The “Querdenker Netzwerk” of Rotfeld-Consulting is looking for a medium-sized company to optimize gear wheels, bearings and other parts subject to friction and abrasion through the pioneering technology of irradiation cross-linking. Promising results are already available.


In electrical engineering, the successful path of radiation crosslinked components made of polyamides began in order to survive melting during temperature peaks. This is state of the art and in series production at most suppliers of switchgear and relays. The fact is, after some time it became apparent that the mechanical life was drastically extended. This developed into the first, and later scientifically proven, principles of significant abrasion reduction by crosslinking the amorphous components of semi-crystalline thermoplastics.