Why We Manufacture Urinals from LLDPE
Linear Low-Density Polyethylene (LLDPE) is not a compromise or cost-saving measure. It is a technically justified material choice for industrial urinals operating in toilet cabins, temporary facilities, and rental fleets.
What is LLDPE and Why is it Used in This Application
LLDPE is linear low-density polyethylene with short-chain branching. Unlike regular LDPE and rigid HDPE, it combines high impact strength with flexibility over a wide temperature range. Our material density is 0.935–0.940 g/cm³, melt flow index 4–8 g/10 min (190°C / 2.16 kg). This is the standard grade for rotational moulding of industrial containers and sanitary equipment operating in harsh conditions.
Lifespan
With proper use and UV stabilizers in outdoor conditions.
Temperature range
Maintains impact strength in cold weather. Does not soften or deform in summer heat at outdoor sites.
Wall thickness
Seamless wall without joints or parting lines. Uniform thickness across the surface, including corners and necks.
Product weight
One installer can set it up without tools in 2–3 minutes. Critical for sites with frequent equipment relocation.
Carbon black content
Carbon black is distributed throughout the wall thickness, not just applied on top. Blocks UV radiation and prevents photodegradation of the polymer chain.
ESCR (ASTM D1693)
According to ASTM D1693 (condition C, 100°C, 10% Igepal): F50 > 1000 hours. Relevant for contact with concentrated disinfectants and surfactants.
Comparison of LLDPE and PP Materials: Advantages and Disadvantages
Polypropylene (PP) is the most common alternative in this price segment. At first glance, PP appears comparable: rigid, chemically resistant, cheaper in injection processing. But when used in open environments, the difference becomes critical.
Linear Low-Density PolyethyleneLLDPE · Pi-Pi | PolypropylenePP | |
|---|---|---|
Impact Strength in Frost | High — the material retains elasticity, does not break upon impact | Low — polypropylene homopolymer (standard for rotomoulding) becomes brittle at temperatures below 0°C, breaking upon impact or drop |
UV Resistance | High — 2.5% carbon black protects the entire wall thickness, not just the surface | Lower than LLDPE — due to tertiary hydrogen in the PP chain, it degrades faster at the same stabilisation level. Typical outdoor lifespan — 2–4 years |
Suitability for Rotomolding | Optimal — wide processing window, uniform melting, seamless monolithic wall | Used, but requires precise temperature control. Narrower processing window increases the risk of surface defects |
Chemical Inertness | Complete — neutral to ammonia, uric acid, and chlorine-containing disinfectants | Good — prolonged contact with concentrated chlorines may cause surface degradation |
Behaviour Under Impact or Vandalism | Deforms without breaking — bends and returns to shape | Brittle fracture — cracks without prior deformation |
Lifespan in Rental Fleet | 7–10 years with proper usage conditions | 3–5 years at open sites without guaranteed UV protection |
Rotational Molding: Why Seamless Design Matters
Pi-Pi urinals are manufactured using the rotational molding (rotomolding) process. LLDPE powder is loaded into a closed mold, which rotates on two axes in an oven at 280–310°C. The melt evenly coats the entire inner surface, forming a seamless 4–5 mm monolithic wall without joints, seams, or parting lines. There are no stress concentration zones, no potential break points — the foundation of durability for repeated transport and installations.
Rotational Molding Instead of Injection Molding
Pi-Pi is produced using rotational molding (rotomolding), not injection molding (in the Dutch context — spuitgieten). These are different processes: rotational molding provides a seamless wall 4–5 mm thick with uniform thickness across the entire surface of the product; injection molding is designed for thin-walled parts with a seam along the mold parting line and requires completely different production volumes. Therefore, if you are looking for a urinal made by injection molding — that is a different product; Pi-Pi belongs to the rotomolding class of industrial sanitary equipment.
Compliance and Certifications
Pi-Pi is manufactured in Estonia (EU) and sources materials from European suppliers. Below is the current certification status. We do not list standards that the product does not fall under.
CE Marking
The wall-mounted waterless urinal is not subject to mandatory CE marking under EU directives. It is not covered by the Machinery Directive 2006/42/EC (no drives or moving parts), does not fall under the Construction Products Regulation 305/2011 (CPR/BauPVO) — it is not a load-bearing construction element, — and is not related to electrical equipment, gas appliances, or PPE. The manufacturer's declaration of conformity is available upon request for tender documentation.
LLDPE Material
LLDPE granulate: density 0.935–0.940 g/cm³, melt flow index MFI 4–8 g/10 min (190°C / 2.16 kg). Material data sheet and batch confirmation are available upon request for supplier qualification.
REACH
The granulate supplier is registered with ECHA under REACH (Regulation EC 1907/2006). It contains no substances from the SVHC list above the threshold concentration of 0.1% by mass. Supplier confirmation is available upon request.
RoHS
The material complies with RoHS Directive 2011/65/EU: restricted heavy metals (Pb, Cd, Hg, Cr⁶⁺) and regulated phthalate groups are not used; halogenated flame retardants are not applied; PFAS additives are not introduced. Technical carbon as a UV stabiliser is not on the list of restricted substances.
Application in Workplaces
The design complies with EU Directive 89/654/EEC on minimum safety and health requirements at workplaces and national regulations on sanitary facilities in European countries (ASR A4.1 in Germany and Austria, similar standards in other EU countries, the UK, and Norway). Applicable in sanitary modules, mobile and temporary toilet units. Compliance assessment for a specific workplace is the responsibility of the operating organisation.
Pi-Pi urinals made from LLDPE
Pi-Pi Standard
Simple one-piece body without a top opening. Suitable for ventilated toilet cabins, site huts, and sanitary modules.
Volume pricing from 10 units
Pi-Pi Standard Plus
There is a Ø70 mm opening at the top, to which an exhaust or water rinsing hose can be connected. Used for enclosed toilet cabins, sanitary containers, and site huts where ventilation is essential.
Volume pricing from 10 units
Have Questions?
Contact us — let's discuss terms, calculate costs, and find the right configuration. I respond within one business day.
Mart Tamm
Account Manager for Estonia
Have questions about products, pricing, or partnership? Email me directly — I'll respond personally.