TPU-MX series for Russia: A Guide for Extreme Cold and Snow Conditions

Most regions belong to temperate continental and subarctic climates, with the core being: long and extremely cold winters, short and warm summers, large temperature differences, frequent snowstorms, strong melting of snow and salt corrosion, and widespread permafrost.

• Extremely cold and low temperature resistance: -35 ℃~-45 ℃, no brittle cracking, no hardening, no delamination
• Anti melting salt/de icing agent corrosion: salt spray resistance, chemical resistance, non hydrolysis, non yellowing
• Strong toughness and impact resistance: thick, stone resistant, snow resistant, wind resistant, noise resistant, and tear resistant
• Hydrophobic and anti icing: snow/ice easily falls off, non stick to snow, easy to clean
• Anti yellowing/anti UV: Snow reflects strong UV, requiring Δ E ≤ 2.0

Substrate: Aliphatic TPU (polycaprolactone type)

Optimal resistance to cold, yellowing, hydrolysis, and salt spray

Refusal: PVC, regular TPU, aromatic TPU (prone to yellowing, low temperature brittleness)

Thickness: 8.5mil -10mm (thickened version)

Siberia/Far East: 10 mil

Moscow/St. Petersburg: 8.5mil

Southern mild zone: 7.5-8.5mil

Coating: nano self-healing+hydrophobic+UV resistant

Transparent car wrap (TPU-PPF) is a typical multi-layer composite film, consisting of three parts: TPU substrate layer, self-healing coating, and adhesive layer. The self-healing ability mainly comes from the thermoplastic elastic network of the coating and the thermal dynamic recombination of molecular chains.

Surface: Self repairing nano coating (outermost layer, 1-3 μ m)

Ingredients: Aliphatic polyurethane elastomer, organosilicon modified resin, nano silica (slip/wear enhancing), UV absorber, hindered amine light stabilizer (HALS)

Function:

• Scratch resistant, hydrophobic, stain resistant, acid rain resistant, anti yellowing

Main body: TPU substrate layer (core, 6-10mil=150-250 μ m)

Soft segment (polyol): determines low-temperature flexibility, elasticity, hydrolysis resistance, and cold resistance

• Polyether type: resistant to low temperatures and good hydrolysis resistance (suitable for Russia)

Hard segment (isocyanate+chain extender): determines strength, toughness, and resistance to yellowing

• Aliphatic (HDI/HMDI): non yellowing, strong weather resistance (a must-have for high-end car clothing)
• Aromatic (MDI): prone to yellowing and inexpensive (low-end)

Bottom layer: Pressure sensitive adhesive layer (PSA, 50-100 μ m)

Ingredients: Acrylic pressure-sensitive adhesive (high initial adhesion+low temperature flexibility)

Formula synthesis

• Elastic prepolymer: a thermosensitive elastomer containing disulfide bonds (- S-S -) or polyol isocyanates
• Crosslinking agent: Mild crosslinking forms a reversible network (not permanently cured)
• Additives: UV stabilizers, hydrophobic additives, leveling agents

coating process

• Precision coating (slit coating/gravure printing) on the surface of TPU substrate
• Thermostatic curing (60-80 ℃): solvent evaporation, mild crosslinking
• Form a dense, highly elastic, smooth, and thermally sensitive nano coating

Self repair principle (molecular level)

• Core: Special elastic molecular network+dynamic reversible chemical bonds
• Under low temperature conditions (-10 ℃~-40 ℃):
• 1. The coating material itself maintains low-temperature flexibility and will not become hard or brittle
• 2. After scratches occur, there is a rebound stress inside the molecule, which will automatically shrink to its original state
• 3. The repair speed may slow down at low temperatures, but it can still be automatically repaired slowly
• 4. Using sunlight, mild hot air, and warm water can quickly activate molecules and accelerate repair completion

• TPU-MX75: 7.5MIL, Lubrizol Material, Ashland glue , warranty 8 years
• TPU-MX85: 8.5MIL, Lubrizol Material, Ashland glue , warranty 8 years

Self healing explation : no need hot water , heat gun and high temperature can repair through coating repairing , such as follows like pictures:

• 1. The construction environment must be kept at a constant temperature
  Construction must be carried out indoors, in a dust-free environment with a temperature of 20-25 ℃
  Low outdoor temperatures in Russia can cause the film to become hard, brittle, unable to stretch, prone to cracking, and prone to delamination
  The car body and film roll should be left at room temperature for 24 hours in advance to warm up
• 2.The car paint must be thoroughly degreased and waxed
  Russian roads are heavily affected by melting snow, salt, sediment, and oil pollution, with strong adhesion
  Deep cleaning, degreasing, iron powder removal, and tar removal are necessary
  There is residual salinization → later foaming, edge peeling, and corrosion of the car paint
• 3.Prohibit direct construction at low temperatures
  Construction is strictly prohibited when the body or film temperature is below 15 ℃
  Low temperature can cause:
  Glue does not stick
  The membrane cannot stretch
  The edge cannot be wrapped
  In winter, it cracks and lifts directly when frozen
• 4. The edges must be fully wrapped and deeply wrapped
  Russia experiences heavy snowstorms and melting snow water is highly corrosive
  All edge seams must be wrapped with a minimum of 5mm without leaving any openings
  Strengthen the edging of door frames, machine covers, leaf plates, and wheel arches with emphasis
  Prevent snow and salt infiltration from causing delamination
• 5. Hot air baking should be uniform and not excessive
  Low temperature environment shaping requires the use of a hot air gun, but cannot be directly baked at high temperatures
  Excessive heating can damage the self-healing coating and lose its repair function
  After shaping, let it cool naturally and do not immediately encounter cold
• 6. Strict maintenance within 48 hours after installation
  Do not wash the car, do not get wet, do not drive out, do not blow dry
  Do not allow the car to encounter low temperatures, frost, and snow accumulation
  Ensure that the glue is fully cured, otherwise it will edge up in winter
• 7. Special requirements for extremely cold regions (Siberia/Moscow, etc.)
  After installation, park indoors for at least 3-5 days
  Don't immediately start the salt road
  Regularly clean the salt to avoid long-term corrosion of the film edges

The transparent car PPF market in Russia is currently in a stage of rapid growth, structural upgrading, and brand reshuffle, driven by four major factors: extreme cold and salt erosion of demand, preservation of second-hand cars, decline of Western brands, and rise of Chinese goods. Russian transparent car PPF is a high growth essential market, with the core being extremely cold and salt resistant+self-healing TPU. Chinese brands are rapidly replacing Western brands with cost-effectiveness and cold resistant technology, and the next three years will still be a golden period for expansion.