Why Artificial Marble Sticks to Mould | Best Release Film Solution for Easy Demoulding

In artificial marble manufacturing, mould sticking is one of the most critical production problems, directly affecting product quality, production efficiency, and operational costs.

When artificial marble sticks to the mould, it can result in:

• Surface damage or tearing
• Increased defect rate
• Production delays
• Higher labor and maintenance costs

Despite using traditional release agents such as wax or oil-based systems, many manufacturers still face inconsistent demoulding performance.

This article provides a complete technical breakdown of why artificial marble sticks to moulds, along with proven industrial solutions, with a focus on PVA water soluble release film as the most effective modern alternative.

🔷 What Happens When Marble Sticks to the Mould?

During the curing process, artificial marble materials—typically composed of unsaturated polyester resin, fillers, and additives—undergo chemical and physical changes.

If there is insufficient separation between the mould and the material, adhesion occurs due to:

• Chemical bonding
• Mechanical interlocking
• Surface tension effects

👉 This leads to difficult demoulding and product defects

🔷 Root Causes of Mould Sticking

1. Ineffective Release Agent System

Traditional release agents such as wax or oil often fail due to:

• Uneven coating thickness
• Degradation under curing temperature
• Migration into resin surface layer

These issues result in localized sticking areas, causing:
❌ Partial adhesion
❌ Surface defects
❌ Gloss inconsistency

2. Mould Surface Condition

The condition of the mould plays a critical role in demoulding performance.

Common problems:

• Micro scratches
• Surface roughness
• Residue buildup from previous cycles

These imperfections create mechanical anchoring points, increasing adhesion.

3. Resin System Reactivity

Certain resin formulations, especially high-reactivity polyester systems, can increase adhesion:

• High crosslink density
• Strong interaction with mould surface
• Increased shrinkage stress

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4. Process Parameters

Improper process control can worsen sticking issues:

• Excessive curing temperature
• Rapid curing speed
• Poor degassing (air bubbles increase contact points)

🔷 Why Traditional Release Agents Are No Longer Enough

In modern artificial marble production, especially for high-gloss or premium products, traditional release systems show clear limitations:

👉 This is why more factories are switching to water soluble release film technology

🔷 Best Solution: PVA Water Soluble Release Film

The most effective way to eliminate mould sticking is to use PVA water soluble release film, which provides a physical separation layer instead of relying on chemical release.

How It Works

PVA release film acts as a barrier between the mould and artificial marble:

• Prevents direct contact
• Eliminates chemical bonding
• Ensures uniform separation

🔷 Key Advantages

✔ Complete Anti-Sticking Performance

The water soluble release film eliminates adhesion entirely in most cases.

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✔ Uniform Demoulding

Unlike liquid release agents, film provides consistent coverage across the entire mould surface.

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✔ No Residue, No Cleaning

After demoulding:
👉 Film dissolves in water
👉 No oil contamination
👉 No additional cleaning required

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✔ Improved Surface Quality

Prevents:

• Surface tearing
• Micro defects
• Gloss loss

🔷 Process Optimization Using Release Film

To fully eliminate sticking issues, follow this optimized process:

Step 1: Mould Preparation

• Clean thoroughly
• Polish to mirror finish
• Remove all residues

Step 2: Apply PVA Release Film

Use high-quality PVA water soluble release film and ensure:

• Full surface coverage
• No wrinkles or folds
• Proper alignment

Step 3: Casting

• Use optimized resin formulation
• Ensure good flowability

Step 4: Degassing

• Use vibration or vacuum
• Remove trapped air

Step 5: Controlled Curing

• Maintain stable temperature
• Avoid thermal shock

Step 6: Demoulding

• Smooth removal
• No sticking or tearing

Step 7: Water Dissolution

• Wash surface
• Film dissolves completely

🔷 Advanced Factory-Level Solutions

For large-scale production, consider:

✔ Automated Film Placement

Ensures consistency across batches

✔ Environmental Control

Humidity and temperature stabilization reduce adhesion risks

✔ Integrated Material System

Combine:

• Water soluble release film → separation
• PCE → flowability
• HPMC → stability

👉 This creates a complete artificial marble optimization system

🔷 Comparison: Film vs Traditional Release Agent

🔷 Conclusion

Artificial marble sticking to mould is not a random issue—it is the result of release system limitations, mould condition, and process control.

Among all solutions, upgrading to PVA water soluble release film provides the most effective and immediate improvement.

👉 It ensures:

• Zero sticking
• Consistent demoulding
• Higher surface quality
• Lower production cost

For modern artificial marble factories, it is no longer optional—it is a necessary upgrade.

CTA – Solve Your Sticking Problem Now

If your production line is facing mould sticking issues, it’s time to upgrade your release system.

👉 Get Free Sample of PVA Water Soluble Release Film
👉 Factory Direct Supply | Custom Size Available

📩 Email: chris@innonew-material.com
📱 WhatsApp: +86 17736063980