The core advantage of using TPU as the waterproof layer for ice bags is its softness, good resistance to low temperatures, safety, and non-toxicity; the disadvantages are high price, sensitivity to high temperatures and UV rays, and susceptibility to hydrolysis. Overall, the cost performance is higher than PVC, making it the mainstream choice for mid-to-high-end ice bags.
✅ Advantages
Soft and skin-friendly, remains flexible even at -35 to -40℃, can be repeatedly bent without cracking; comfortable to apply, prevents frostbite.
Much softer than PVC, the ice bag can be freely curled to fit the body.
Safe, non-toxic, environmentally friendly, compliant with regulations; no plasticizers or phthalates, available in medical grade or food grade; no odor, compliant with RoHS/CE.
Suitable for infants, the elderly, and sensitive skin.
Strong waterproof sealing, durable and resistant to leakage
High water pressure resistance (≥10000mm water column), high-frequency heat sealing edges, no water leakage even long-term use.
Resistant to wear and tear, tear strength is 3-5 times that of rubber; resistant to aging, lifespan is 1-3 years (PVC lasts about 6 months).
Resistant to oil and mold, easy to clean
Resistant to oil stains, sweat, common cleaning agents; smooth surface, easy to wipe, less prone to bacterial growth.
Thin and flexible, with optional moisture permeability
Thickness 0.1-0.3mm, not heavy; micro-pore TPU can provide waterproof and moisture-permeable protection, reducing condensation and heat.
❌ Disadvantages
Higher price
30%-80% more expensive than PVC; requires high-frequency heat sealing for processing, high equipment costs.
Not resistant to high temperatures and UV rays
Will soften and deform at temperatures above 60℃; easily yellow, harden, and lose elasticity under direct sunlight exposure.
Not suitable for microwave or direct sunlight exposure; storage requires avoiding sunlight and keeping cool.
Polyester type is prone to hydrolysis
Will degrade and become brittle when soaked in water (especially hot water); prefer polyether type TPU, which has better hydrolysis resistance.
Limited chemical resistance
Avoid alcohol, acetone, strong acids and alkalis, which will cause swelling and degradation; use neutral water for cleaning.
TPU vs PVC (Commonly Used in Ice Bags)
Softness: TPU is extremely soft (-40℃ is flexible); PVC is relatively hard, more rigid at low temperatures.
Safety: TPU is non-toxic and odorless; PVC has plasticizers and an odor at low temperatures, prone to release.
Durability: TPU is resistant to folding and aging (1-3 years); PVC is prone to cracking (3-6 months).
Price: TPU is in the mid-to-high range; PVC is low.
✅ Purchase Suggestions
For daily use, medical purposes, or children: Choose polyether type TPU, 0.2-0.3mm, heat-sealed edges, without odor, safe and durable.
Budget-sensitive: Choose high-quality PVC for temporary use; for long-term use, prioritize TPU, with lower overall cost.
