DIP PVC Compound for Footwear: Process, Advantages & Material Guide (2026)

What is DIP PVC Injection in Footwear Manufacturing?

The Direct Injection Process (DIP) is one of the most efficient manufacturing methods in the footwear industry.

👉 It refers to injecting molten PVC compound directly into a mold, where it bonds with the shoe upper in one step — without glue.

This creates:

One-piece shoes

Strong molecular bonding

High production efficiency

DIP is widely used for:

PVC slippers

Sandals

Rain boots

Casual injection shoes

Why DIP Technology is Growing Globally

The DIP process has evolved into a mainstream production method due to its balance of cost, durability, and automation.

Key Industry Trends:

Shift from ready-to-use material → local compounding

Increasing demand for cost control & flexible production

Growth in emerging markets (Africa, Middle East, South America)

👉 Many factories are now choosing to:

Import PVC chemicals → produce compound locally → reduce total cost

How the DIP Injection Process Works

Step-by-step production flow:

1. Upper Preparation

The shoe upper is placed on a last and fixed into the mold.

2. Injection

Molten PVC compound is injected into the mold under:

High temperature

High pressure

High-speed screw rotation (~18000 rpm)

3. Bonding & Forming

PVC material:

Fills the mold cavity

Wraps around the upper edge

Bonds at molecular level

4. Cooling & Demoulding

After cooling:

The mold opens

A complete shoe is formed in one step

Key Advantages of DIP PVC Shoes

1. No Glue = No Delamination

The sole and upper are chemically bonded.
👉 No risk of sole separation.

2. High Production Efficiency

Fully automated machines

One pair in minutes
👉 Ideal for large-scale production

3. Waterproof & Seamless

One-piece structure

No leakage points
👉 Perfect for rain boots & slippers

4. Clean & Premium Appearance

Smooth edges

No glue marks

Better finishing quality

Limitations of DIP Process

1. High Mold Investment

Each design requires a dedicated mold

Typical cost: USD 800–900+

2. Limited Design Flexibility

Hard to modify after mold is made

Not suitable for complex multi-material soles

3. Precision Requirement

Mold tolerance: ±0.25 mm

Risk of:

Over-injection

Unstable nip line

What Makes a Good DIP PVC Compound?

A high-quality DIP PVC compound is the key to stable production.

Essential Properties:

✔ Excellent flowability
→ ensures smooth injection

✔ Low viscosity
→ prevents air bubbles & defects

✔ Balanced hardness (Shore A 50–80)
→ comfort + durability

✔ Strong bonding ability
→ works with most upper materials

✔ Anti-yellowing & weather resistance
→ suitable for export markets

Why More Factories Shift to PVC Chemical Solutions

Instead of importing finished compounds, many factories now prefer:

👉 PVC resin + DOP + chemical additives (local mixing)

Benefits:

Lower total cost

Flexible formula adjustment

Faster response to market changes

This model is especially popular in:

Saudi Arabia

Turkey

Africa markets

South America

Our Solution for DIP PVC Production

At RELYON TECH, we provide:

✔ Super Light PVC Chemical for Slipper & Sole

Stable foaming

Lower density

Cost-effective

✔ Full Technical Support

Formula guidance

Machine parameter optimization

On-site production troubleshooting

✔ Customized Solutions

Based on your machine

Based on your target density & hardness

Conclusion

The DIP process is not just a production method —
👉 it is a cost control + efficiency + durability solution for modern footwear factories.

As global markets become more competitive,
factories that control materials + process will always win.

📩 Contact Us

If you want to:

Reduce production cost

Improve DIP stability

Develop new lightweight PVC products

👉 Contact us today:
Email: salerelyon@gmail.com
Website: www.relyon-tech.com

E-mail: salerelyon@gmail.com

Phone/WhatsApp: +86 15759875789

Address: No;40 7th Qianshan District, Neikeng Town, Jinjiang City, Quanzhou,Fujian, China