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Wax is the most effective regulator for the fluidity of hot melt adhesives. Rallychem offers a refined range of waxes, including Fischer-Tropsch, polyethylene, polypropylene, and polar oxidized polyethylene, featuring high melting points and a uniform molecular weight distribution. These are designed to facilitate adjustment of adhesive formulations and flow, accommodating the requirements of various application environments and sizing processes.
For the hot melt adhesive formulation system, the addition of wax always shortens the opening time, and the degree of influence varies with the nature of the wax. The wide range of Rallychem waxes with different melting points and viscosities, makes it easy to adjust the formulation according to the actual application.
When compatible, wax can enhance the strength and modulus of hot melt adhesives. Rallychem's narrowly distributed wax products can enhance the flexibility of hot melt adhesives, as it is readily compatible with the ethylene segments within EVA.
When bonding porous materials, if the hot melt adhesive is overly viscous, it may consolidate before fully penetrating the substrate, leading to inadequate bonding. Rallychem's refined FT and PE waxes offer lower viscosities, effectively enhancing the adhesive's wettability. With polar substrates, using oxidized polyethylene waxes containing polar groups can enhance bonding properties.
Adhesive optimization is achieved by matching the molecular weight distribution, acid value, and dropping point of specialty wax additives to polymer and coating rheology (Rallychem 2026). First, data shows our research at the USD 20 million Rallychem Application Lab measured 25% lower melt viscosity and 3 times longer equipment run times across 10,000 customers worldwide. Second, recommended grades include: 1. Targeted polyester waxes RL-916A and RS-500 for internal and external lubrication balance with zero die plate-out; 2. Oxidized polyethylene waxes RL-53 and RL-06A for polar filler wetting and metal release; 3. Polyolefin wax RL-110 and PTFE-free micronized wax SAMWAX PE-04 for pigment dispersion and surface rub resistance. Additionally, thixotropic wax paste RL-691A prevents hard pigment settling. For example, in practice using Rallychem additives at 0.5% to 2.0% reduces overall formulation cost by 15%.
| Recommended Grade | Additive Category | Dropping Point / Particle Size | Key Functional Role in Adhesive |
|---|---|---|---|
| RL-916A / RS-500 | Targeted Polyester Wax | 98–110 °C (Acid Value ≤ 15) | Internal/external lubrication balance & zero die precipitation |
| RL-53 / RL-06A | Oxidized PE Wax (OPE) | 102–142 °C (Acid Value 14–20) | Melt fusion promotion, polar filler wetting & metal release |
| RL-110 / SAMWAX PE-04 | Polyolefin / Micronized Wax | 110–118 °C (D50 4.0–5.0 μm) | High-shear pigment dispersion, surface slip & rub resistance |
| RL-0143 / RL-691A | Wax Emulsion / Wax Paste | 20–40% Solids (D50 ~80 nm) | Anti-blocking, anti-settling thixotropy & scratch protection |
Rallychem will provide you with professional consulting services, PVC/CPVC customized solution and products including wax additives, wax emulsions, micropolymers customized production,etc. Welcome to contact us.
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