PROFILES

Today the applications for profiles in thermoplastic materials are almost endless. 

The property range in the thermoplastic materials means that most requirements can be met and often with considerable advantages as for weight and environment, compared to alternative materials such as metal, aluminium and wood.

We have carefully picked materials especially well suited for a number of applications in conveyor, medical and food industries as well as for shop fittings.

 

In addition to the group of polyolefines (LDPE, HDPE and PP) the materials also include polymers such as fluor polymers, polyamides and thermoplastic elastomers.

Please contact us for advice and guidance concerning choice of materials for specific purposes.

 

Types

PA ALLOYS (TCP) is an alloy of PA 6 and HDPE, and by means of a special additive we have managed to unite two incompatible materials. This provides a completely homogenous structure complying the best properties from each material.

In co-operation with the French petrochemical company ARKEMA (former ATOFINA), Knudsen Extrusion ApS developed a new material in 2000, TCP, for glide and wear profiles for the conveyor industry.

 

Material

PA 6

ADVANTAGES
  • melting point at 220°C
  • continuous work temperature at +100°C
  • high rate of rigidity and surface hardness
  • high durability
  • resistant to oil products, petrol, fatty substances, lubricants and solvents such as alcohol, ketones, esters and ether

DISADVANTAGES
  • large water absorption
  • not dimensionally stable at varying humidity
  • 25% higher density than HDPE
  • not resistant to many acids, strong bases and oxidizing agents - chlorine based products - hydrolysis

 

Material

HDPE

ADVANTAGES
  • resistant to hydrolysis
  • low friction
  • low density
  • resistant to most aqueous solutions of salts, acids and bases

DISADVANTAGES
  • melting point at ~130°C
  • continuous work temperature at max. +70°C
  • limited durability which is rapidly degraded as the temperature rises
  • not resistant to highly oxidizing chemicals or most chemicals at temperatures > 60°C

 

Material

TCP

ADVANTAGES
  • melting point at 220°C
  • continuous work temperature at +100°C
  • high rate of rigidity and surface hardness
  • high durability
  • low friction(< UHMW-PE)
  • low thermical expansion
  • good dimensional stability
  • outstanding chemical resistance
  • approved for contact to foods according to European regulations
  • resistant to hydrolysis
  • low water absorption

DISADVANTAGES
  • density between HDPE and PA 6
  • water absorption max. 4%
  • has not been tested according to the FDA

 

POLYOLEFINES are comparatively low cost materials, combining a number of good mechanical and chemical properties in a temperature range from -50°C to +70°C (dependent on type). 
Most of the types have been approved for foods by the American Food and Drug Administration (FDA) and according to a number of European regulations.
Our standard range include 6 types:

 

Material

Hardness

E-Module
LDPE D 51 300 MPa
HDPE P D 65 1.400 MPa
HDPE 250 D 60 1.000 MPa
HMW-PE - 1.200 MPa
PP-H2000 D 73 2.000 MPa
PP-C1100 D 66 1.100 MPa

Resistance
to pressure

Service-
temperature

Data sheet
- -20 til +50°C LDPE
- -30 til +60°C HDPE P
- -30 til +60°C HDPE 250
- -50 til +70°C HMW-PE
- 0 til +80°C PP-H2000
- -30 til +70°C PP-C1100

 

FLUOR POLYMERS: In the group of fluor polymers, the best possible product for profiles is PVDF.
As standard we recommend an unmodified PVDF-type, which has been approved for e.g.: Food contact according to the American Food and Drug Administration (FDA), medical use according to USP Class VI and drinking water according to NSF 51.
Typical applications for PVDF profiles are: The conveyor industry (e.g. for chemical or high temperature environments).

 

Material

Hardness

E-Module
PVDF HA D 80 2.000 MPa

Resistance
to pressure

Service-
temperature

Data sheet
- -30 til +140°C PVDF HA

 

OTHER MATERIALS FOR PROFILES: In addition to the materials described in the previous sections, we produce profiles in a variety of other thermoplastic polymers.
We have profound knowledge about profile production in e.g.: POM, PC (unfilled types and types with glass), elastomers, modified polyethylene (PE), fluor polymers (PFA, FEP and ETFE), CAB and TPX.

Please contact us for further information.

Knudsen extrusion aps
Ny Esbjergvej 5
4720 Præstø
Denmark
Phone: +45 55 99 15 30

Our QMS is certificied by Bureau Veritas according to
ISO 9001 : 2015

TERMS AND CONDITIONS



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