Axson UP 7495 Vacuum Casting Services | High Tear Strength Elastomer Factory

Axson UP 7495 Vacuum Casting Material

Axson UP 7495 is a premium polyurethane elastomer system designed to meet the most demanding requirements for flexible prototypes. While standard rubber simulants are sufficient for visual models, UP 7495 delivers functional durability. It is characterized by its outstanding tear propagation resistance and high elongation at break. At JUCHENG, we recommend this material for engineering applications where the part must withstand stretching, twisting, or abrasion without failing. It effectively simulates high-grade TPE, TPU, or industrial Rubber, bridging the gap between prototyping and mass production performance.

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Axson UP 7495

Caractéristiques de base et composition

Axson UP 7495 is a three-component system known for its robust mechanical properties.

Superior Tear Strength: This is its defining feature. Unlike weaker elastomers that tear easily once nicked, UP 7495 resists tear propagation, making it suitable for dynamic seals and flexible hinges.
Allongement élevé: It can be stretched significantly (often >500%) and returns to its original shape with good memory (rebound).
Résistance chimique: Offers better resistance to concrete, plaster, and mild chemicals than standard urethanes.

Stabilité dimensionnelle: Low shrinkage for an elastomer, ensuring accurate fit for gaskets.

Options de couleur

Standard: Off-White / Beige (Natural).
Coloration: JUCHENG excels at tinting UP 7495. Because painting flexible parts is prone to cracking, we add pigments directly into the liquid resin to achieve durable, integral colors like Safety Yellow, Black, or Red.

Paramètres techniques clés

1. Propriétés mécaniques (Valeurs typiques après post-durcissement) :

Propriété	Valeur	Unité	Standard
Dureté	55 - 60	Shore A	ISO 868
Résistance à la déchirure	> 45	MPa	ISO 527
Résistance à la traction	8 - 10	%	ISO 527
Allongement à la rupture	> 500	kN/m	ISO 34
Rebound Resilience	45 - 50	%	-
Retrait linéaire	0.1 - 0.5	%	-

2. TRAITEMENT

Vacuum Quality: Crucial. Any micro-bubbles acting as stress concentrators will ruin the tear strength. Our high-vacuum casting process guarantees a void-free solid elastomer.
Mélange: Three components must be weighed and mixed precisely to ensure the curing reaction proceeds correctly.
Durée de vie en pot: Approx. 15-20 minutes, allowing for the filling of large or complex molds.
Démoulage: 12-16 hours at room temperature or accelerated with heat. Longer cure times than rigid plastics.

3. PRÉCAUTIONS

Mold Release: Due to its adhesive nature, specific release agents must be applied to the silicone mold to prevent sticking.
Humidité: Sensitive to humidity; materials are stored in climate-controlled areas.

4. STOCKAGE

Conditions: Stocker dans un endroit sec entre 15°C et 25°C.

Scénarios d'application et domaines

Axson UP 7495 is used where durability is non-negotiable:

Industrial Seals: Heavy-duty gaskets for machinery, oil seals, watertight grommets.
Flexible Molds: Used to make molds for casting concrete, gypsum, or ceramics (due to chemical resistance and tear strength).
Automobile: Suspension dust boots, flexible air intake hoses, vibration isolators.
Footwear: Outsole prototypes requiring high abrasion resistance and flex fatigue life.

Poignées souples: Overmolding onto metal tools for ergonomic handles.

Compatibilité avec le processus de moulage sous vide

Outillage silicone: Compatible with standard silicone molds. The high tear strength allows for demolding complex shapes with severe undercuts without tearing the part.
Adhésion: Bonds well to metal inserts or rigid PU substrates when used in overmolding applications.
Finition: Flash must be trimmed carefully with sharp tools. Sanding is difficult; smooth mold finishes (gloss or texture) are preferred.

Avantages vs. Limites

Avantages	Limites
Extreme Tear Resistance: Best-in-class durability.	Cure Time: Longer demolding time slows down production speed slightly.
High Elasticity: Great stretch and rebound.	Hardness Range: Primarily available in the Shore A 55-60 range (Medium Soft).
Mold Making: Can be used as a mold material itself.	Surface Finish: Difficult to post-process/polish; rely on mold texture.
Chemical Stability: Resists aggressive casting materials (like concrete).	Cost: Premium material cost.

Fabricants et alternatives

Fabricant: Sika Axson.
Alternatives chez JUCHENG:

If you need adjustable hardness (40A-90A): We recommend Hei-Cast 8400 Series.
If you need a rigid part: We recommend Hei-Cast 8150.

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