PU SR-081 is a fully-formulated slow-rebound (slow-recovery) polyol system for moulded stress balls and squeeze toys. Foamed with PU ISO 113 isocyanate, it produces soft, low-density toy foam with a pleasant hand-feel that slowly springs back when squeezed — ideal for colourful stress balls, emoji balls and squishy novelty toys. The rebound speed and softness are tunable simply by adjusting the mixing ratio.
Slow
rebound / tunable by ratio
Low
density / soft hand-feel
100:37
A : B mixing ratio
3–5 min
demould time
2-part
polyol + isocyanate
Key Features
Satisfying slow rebound Squeeze and watch it slowly return to shape — the signature stress-ball feel.
Tunable softness & rebound Adjust the A:B ratio to dial in firmer or softer, faster or slower recovery.
Soft, skin-friendly hand-feel Smooth, low-density surface that is comfortable to squeeze repeatedly.
Takes colour & printing Mouldable in bright colours and surface-printable for emoji and character designs.
Fast moulding cycle Demould in 3–5 min for efficient high-volume toy production.
Custom formulation Density, colour and feel tuned to your toy design. OEM/ODM supported.
Applications
Colourful Stress BallsEmoji Stress BallsPrinted Squeeze BallsSports Balls & Raw Material
Also moulded from PU SR-081: sports-ball stress toys, squishy novelty & food toys, promotional / giveaway balls and sensory / fidget toys. Related grades: slow-recovery memory-foam pillow and high-resilience seat / cushion grades.
Technical Specifications
Item
Specification
Model
PU SR-081 (polyol) + PU ISO 113 (isocyanate)
Appearance (polyol)
Viscous milky white liquid
Viscosity (25 °C)
1050 ± 200 mPa·s
Specific gravity (20 °C)
1.03
Mixing ratio (A : B)
100 : 28–38 (typical 100 : 37)
Material temperature
A 20–28 °C / B 18–25 °C
Mould temperature
35–45 °C
Demould time
3–5 min
Per PU SR-081 TDS; rebound speed and density tunable by formulation. Typical values for reference, not a binding specification.
Processing
Moulded Casting Cast into ball and novelty moulds; demould in 3–5 min.
Tunable Ratio A : B = 100 : 28–38 to set softness and rebound speed.
Two-Component System PU SR-081 polyol with PU ISO 113 isocyanate.
Machine Compatible Suitable for low- and high-pressure PU foaming machines.
Packaging, Storage & Handling
Packaging Polyol and isocyanate supplied in iron drums; palletised for export. Bulk on request.
Storage Store sealed at 5–35 °C; the polyol absorbs moisture, so keep tightly sealed and store separately from isocyanate.
Handling & Safety Avoid eye/skin contact. If splashed, wipe off and wash with soapy water. Mix thoroughly before use, especially after long storage. Full MSDS on request.
10+ years in PU raw materials Specialised blended-polyol & foam-material supplier serving industry worldwide.
Custom formulation Softness, rebound speed and colour tuned to your toy.
Equipment integration Foaming machines, moulds and process support as a complete solution.
Global export & fast reply Export to EU, Latin America, Asia and beyond — we respond within 24 hours.
From Sample to Bulk Order
1. Share your toy Tell us the ball / toy type, size, target softness and rebound — we recommend a formulation.
2. Sample & validate Trial-mould samples; we fine-tune ratio, softness and rebound speed.
3. Scale to bulk Confirm the formula and order in bulk with flexible MOQ and tiered lead times.
Frequently Asked Questions
Is PU SR-081 a finished toy or a raw material?It is a raw-material polyol system. Mixed with PU ISO 113 isocyanate and moulded, it produces slow-rebound stress balls and squeeze toys.
Can the softness and rebound be changed?Yes. Simply adjusting the A : B ratio (100 : 28–38) tunes the softness and how slowly the ball returns to shape.
Can it be coloured and printed?Yes. It can be moulded in bright colours and surface-printed for emoji, sports and character designs.
What is the cycle time?Demould time is about 3–5 minutes at a mould temperature of 35–45 °C, suiting high-volume toy production.
Need slow-rebound foam for stress balls & toys?
Get a tailored PU SR-081 formulation, full TDS & MSDS, and a sample for moulding validation.
✓ Tunable softness & rebound✓ TDS · MSDS · COA✓ Reply within 24 h
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