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Material

Acetal – Polyoxymethylen – POM.jpg
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Acetal – Polyoxymethylene – POM

cetal, also known under the brand name Delrin, is used to make the locking mechanisms of various plastic seals. This thermoplastic is strong, hard and rigid over a wide temperature range.
Acetal absorbs very little water and remains hard at temperatures down to -40°C. It is also highly heat resistant, melting at 180°C. Acetal may be approved for contact with foodstuffs. Disposal: pure acetal is classified as recycling code 07 (other plastics) and can be melted down if cleanly separated from other waste.
 
Composites of this material are classified as follows:
  • plastic/aluminium – recycling code 90
  • plastic/tinplate – recycling code 91
  • plastic/miscellaneous metals – recycling code 92
Acrylnitril-Butadien-Styrol – ABS.jpg
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Acrylonitrile butadiene styrene – ABS

Acrylonitrile butadiene styrene is resistant to oil and can withstand high temperatures, permitting continuous use between 85°C and 100°C.
Disposal: ABS is classified as recycling code 07 (other plastics) and can be melted down if cleanly separated from other waste.
Composites of this material are classified as follows:
  • plastic/aluminium – recycling code 90
  • plastic/tinplate – recycling code 91
  • plastic/miscellaneous metals – recycling code 92
Seals made from ABS: Locktainer SH and SHL, Locktainer SHC, Locktainer SHR-C, Locktainer 2020, IP Seal, FastGrip 100, FastGrip 120, Flexigrip 100 S, Flexigrip 150 S.
Polyamid 6 – Nylon – PA.jpg
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Polyamide 6 – Nylon 6 – PA

Polyamide 6, commonly known as Nylon 6, is used as a base material for various plastic seals. This thermoplastic is very strong, rigid and tough. It is highly resistant to wear, friction and abrasion.
Polyamide 6 is also highly resistant to heat, chemicals, lubricants and motor fuels. However, polyamides can absorb water, which make them susceptible to frost damage.

Disposal: PA is classified as recycling code 07 (other plastics) and can be melted down if cleanly separated from other waste.

Composites of this material are classified as follows:
  • plastic/aluminium – recycling code 90
  • plastic/tinplate – recycling code 91
  • plastic/miscellaneous metals – recycling code 92
  • Seals made from PA: BP 540, BP 570, Cable Tie, Combi.
  • plastic/tinplate – recycling code 91
  • plastic/miscellaneous metals – recycling code 92
Seals made from PA: BP 540, BP 570, Cable Tie, Combi.
Polystyrol – PS.jpg
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 Polystyrene – PS

Polystyrene is used as a base material for various plastic seals. This thermoplastic is resistant to all alkalis and mineral acids, but not to non-polar solvents such as petrol, ketones (eg. acetone) and aldehydes.
Polystyrene absorbs little to no water, so it is not susceptible to frost damage. However, it does not have long-term resistance toUV light and to heat; prolonged exposure to temperatures of 55°C and above will speed up the aging process. Polystyrene is classed as physiologically inert, making it safe for contact with foodstuffs; it is the only plastic that is approved for use in storing raw meat and fish.

Disposal: polystyrene is classified as recycling code 06 and can be melted down if cleanly separated from other waste.
  • Composites of this material are classified as follows: plastic/aluminium – recycling code 90
  • plastic/tinplate – recycling code 91
  • plastic/miscellaneous metals – recycling code 92
Seals made from PS: Polywedge.
Polycarbonat – PC.jpg
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Polycarbonate – PC

Polycarbonate is used as a base material for various plastic seals. It is stiff, strong, tough and hard. Polycarbonates are resistant to water, as well as many mineral acids, oils and fats.
However, they are sensitive to UV light; prolonged exposure will leave them yellow and brittle.

Disposal: PA is classified as recycling code 07 (other plastics) and can be melted down if cleanly separated from other waste.

Composites of this material are classified as follows:
  • plastic/aluminium – recycling code 90
  • plastic/tinplate – recycling code 91
  • plastic/miscellaneous metals – recycling code 92
Seals made from PC: BP 110 Twister, BP 151 Twister.
Polyethylen – PE.jpg
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Polyethylene – PE
 
Polyethylene hardly absorbs any water, so it is not susceptible to frost damage. It is heat resistant up to 90°C, but prolonged exposure to temperatures above 80°C will lead to the material becoming softer. HDPE does not have long-term resistance to UV light; prolonged exposure to direct sunlight will slowly make it brittle.

Disposal: HDPE is classified as recycling code 02 and can be melted down if cleanly separated from other waste.

Composites of this material are classified as follows:
  • plastic/aluminium – recycling code 90
  • plastic/tinplate – recycling code 91
  • plastic/miscellaneous metals – recycling code 92
Seals made from PE: PL 10, PL 91, PL 95, PL 95 for Seal Clamps, Cable Tie (reusable)
Polypropylen – PP.jpg
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Polypropylene – PP

Polypropylene is used as a base material for various plastic seals. The rigidity, hardness and strength levels of this thermoplastic are higher than those of Polyethylene, but lower than those of Polyamide.
Polypropylene is resistant to most organic solvents and fats, and to dilute acids and alkalis. It is heat resistant up to 105°C, but becomes brittle under cold conditions. Polypropylene is classed as physiologically inert, making it safe for contact with foodstuffs and for pharmaceutical applications.

Disposal: polypropylene is classified as recycling code 05 and can be melted down if cleanly separated from other waste.

Composites of this material are classified as follows:
  • plastic/aluminium – recycling code 90
  • plastic/tinplate – recycling code 91
  • plastic/miscellaneous metals – recycling code 92
Seals made from PP: BP 410, BP 411, BP 412, BP 413, BP 414, BP 415, BP 570, BP 571, BP 586, ID Seal, Universal, Poly-Check, Sydex, Dartlock, Padlock, Snaplock.

Surfaces

Chromatieren farblos - blau Verschluesse.jpg
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Chromate conversion coating - blue/clear

Chromate conversion coating is a type of surface finishing. This process employs chromic acid to coat metal surfaces with a layer of chromate.
It provides corrosion protection; it can also be used as a primer for subsequent coatings or to prevent tarnishing.

We use the terms blue and clear chromate conversion coating for the same type of surface finishing. The item acquires a slight blue hue, without losing its metallic appearance. The corrosion protection properties of this process are lower than those of yellow chromate conversion coating.
Chromatieren Gelb Verschluesse.jpg
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Chromatating yellow

Chromate conversion coating is a type of surface finishing. This process employs chromic acid to coat metal surfaces with a layer of chromate.
It provides corrosion protection; it can also be used as a primer for subsequent coatings or to prevent tarnishing.

Yellow chromate conversion coating gives items a hue similar to brass, just that the colouring is often slightly uneven, with shades of red and green. This method protects extremely well against corrosion.
Eloxieren Drahtplomben.jpg
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Tinning (seals)

Security seals manufactured from sheet steel are tin plated. This provides protection against corrosion and surface is food safe.
 
Tinned seals: Tyden seal, Bednorz-Seal.
Verzinnen Plomben.jpg
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Tin-coat

During the tinning process, metal is coated with a thin layer of tin. The corrosion resistance of tinned metals is slightly weaker than that of galvanised steel, however tinned seals are safe for use with foodstuffs.

Seals: Tyden Ball Seal.
Stahl pulverbeschichtet Verschluesse.jpg
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Steel powder - coated

Powder coating is a type of surface finishing that is now commonly used.

As opposed to conventional paints, coating powders are applied electrostatically, without the need for solvents. Powder paint is therefore lower in emissions and comparatively environmentally friendly.

Powder coatings can be applied thickly and are highly flexible. This ensures excellent corrosion protection, as well as high resistance to mechanical stress, weathering and acid degradation.
Stahl vernickelt Verschluesse.jpg
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Steel nickel - plated

Nickel plating is a commonly used method to protect steel against corrosion. Various surface finishes can be achieved as required (matt, semi-gloss, gloss, black).

To increase corrosion protection, nickel is often used as part of a multilayer system, in combination with copper or chrome.
V2A - Stahl Verschluesse.jpg
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V2A / steel (fasteners)

V2A is a popular stainless steel.

It is not only resistant to water, steam or humidity, but also to weak organic and inorganic acids as well as very high and extremely low temperatures. In addition, it has very good polish ability, and particularly good deformability through deep drawing, folding, roll forming, etc. V2A steel is used, among other things, in the food, pharmaceutical and cosmetics industries, in chemical apparatus construction, in vehicle construction, also for surgical instruments and in sanitary facilities.
Verzinken - Plomben - Verschluesse.jpg
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Galvanisation

During the galvanisation process, steel for seals and fasteners is coated with a thin layer of zinc, in order to protect it from corrosion. Galvanised products are not food safe.

Seals: Bednorz‐Seal