Rebound and Shock Absorption of Gel Insoles and Arch Support

INTRODUCTION
Running and walking transmit ground reaction forces of 2-3 times body weight through heel strike, and insole gel pads absorb that impact while supporting arch and heel geometry. Effective gel insoles need a narrow balance: too soft and the pad bottoms out with no support; too hard and it transmits shock like plastic. Hong Ye HY-9409 (penetration 150 plus or minus 30, density 0.96) is tuned as insole-grade transparent gel with viscoelastic behavior: under the fast compression of heel strike the jelly mass deforms and dissipates impact energy as internal friction, while under slow standing load it provides stable arch support; it rebounds fully between strides with zero compression set over millions of steps. The gel is skin-contact safe, survives shoe temperature and sweat environments, and its transparency suits visible-gel window designs in performance footwear.

PRODUCT REQUIREMENTS
Insole gel requires: impact damping at fast compression with support at slow load; full rebound with zero compression set; millions of cycles durability; sweat and temperature resistance; anti-yellowing transparent clarity; skin-contact safety; and zone-specific firmness tuning.

CORRESPONDING PRODUCT MODEL PARAMETERS
Recommended model: HY-9409 - Transparent low-tack grade for intimate apparel, personal-care and body-contact products requiring clarity and skin-safe materials

FREQUENTLY ASKED QUESTIONS
Q: Does gel cushioning flatten out over time?
A: No. The crosslinked gel rebounds fully with zero compression set; cyclic tests show stable performance through millions of step simulations, unlike foams that pack out.
Q: Why use different firmness in one insole?
A: Heel zones need softer gel for impact absorption while arch zones need firmer gel for support; zoning gives both functions in one insert.
Q: Will the transparent gel yellow inside shoes?
A: The anti-yellowing formulation maintains clarity through sweat and UV aging; white or tinted options are also available for non-window designs.

QUALITY ASSURANCE & CERTIFICATION
Every batch of Hong Ye HY-94 series jelly gel is produced under ISO 9001 certified quality management in a dedicated silicone workshop, with incoming raw-material inspection, in-process mixing control and finished-product testing on every batch. Before release each lot is checked for viscosity, mix ratio, cure time, penetration, color and tack, and a Certificate of Analysis (COA) listing the actual measured values ships with every order. Standard grades carry RoHS 2.0 and REACH SVHC test reports; skin-contact and baby-care grades can be supplied with FDA 21 CFR 177.2600 and LFGB Section 30/31 reports and, on request, ISO 10993 biocompatibility testing; flame-retardant grades meet UL94 V-0. Food-contact, medical and export orders are supported by the corresponding compliance files for customer qualification. Hong Ye has manufactured and supplied jelly gel to contractors, filter builders and equipment makers in over 60 countries since 2005, with monthly capacity above 500 tons, batch traceability and multi-language documentation. Application engineers provide grade selection, sample evaluation, on-site or video pouring guidance and after-sales follow-up, and technical data sheets (TDS), safety data sheets (SDS) and test reports are available before order to support tender and audit processes.

CONCLUSION
The market for tank sealant jelly gel in this application area continues to expand as cleanroom construction, electronic encapsulation, automotive electrification, energy storage and consumer product manufacturing drive demand for reliable two-component addition-cure silicones. Hong Ye supports this growth with ISO 9001 certified production, 500-plus ton monthly capacity, complete compliance documentation and responsive application engineering. Buyers evaluating suppliers are advised to look beyond unit price and compare batch-to-batch consistency, documentation completeness, delivery stability and technical service responsiveness, because the cost of a sealing or potting failure - rework, downtime, certification delay or product recall - far exceeds the incremental cost of a quality gel. Choosing the correct grade for the channel, operating temperature and service environment, following the 1:1 mixing and pouring procedure and validating with a small trial batch all help secure a durable seal. Hong Ye welcomes sample requests and application enquiries; our engineers will recommend the HY-9400, HY-9405 or HY-9409 grade that matches the sealing or potting requirement and support qualification from first sample through volume production.