Technical Articles
What VCI is, how vapor corrosion inhibitors work, VCI film, paper and bags, and how to protect metal goods in storage and export shipping.
Virgin PP is recognised as safe by FDA, EFSA and WHO: BPA free, no endocrine disruption detected. What research on complex mixtures does and does not change.
PP (Polypropylene) melts at 160 - 168 C, holds water up to 100 C and survives autoclave sterilisation. Standard for microwave boxes and PPR hot water pipes.
HDPE melts at 120 - 135 C, continuous service limit 82 C, processing 180 - 240 C. Full temperature threshold table versus LDPE, PP, PET and PA6.
Plastic number 5 (PP) is approved by FDA, EFSA and WHO: BPA free, low migration. Real limits: overheating above rated temperature and non food additives.
PP (resin code 5) can be mechanically recycled 4 - 10 times. PP pallets and crates are the most efficiently recyclable PP products, plus recycling rates.
Plastic number 2 is HDPE: BPA free, approved for food contact by FDA and EU. Industrial drums and pallets are built for 7 - 10 years of safe reuse.
rHDPE pellets: 2-5mm granules from recycled HDPE. Post-industrial grades retain 90-95% of virgin properties. Applications: pipes, bins, automotive, lower-cost pallets.
PE vs HDPE: HDPE is a high-density PE subtype (0.93-0.97 g/cm3) with linear chains, higher stiffness and strength. LDPE is flexible. Full comparison of PE family grades.
