Laundry pods may look simple, but producing a stable, high-quality pod requires precise coordination between detergent formulation, PVA water-soluble film, filling, sealing, storage, and packaging.

During production, storage, or transportation, brands may encounter common quality issues such as leakage, broken pods, incomplete dissolution, sticking, and clumping.

These problems are not only aesthetic concerns. They can directly affect product performance, consumer experience, transportation safety, and brand reputation.

So, what causes these problems—and how can they be prevented?

1. Liquid Leakage

What Does It Look Like?

Liquid detergent may leak from the pod or appear around the sealing area.

In serious cases, leakage can affect neighboring pods and packaging.

Common Causes

1. Poor Sealing

If the PVA film is not properly sealed, the pod may develop weak points around the edges.

2. Film and Formula Incompatibility

Certain detergent formulations may affect the mechanical or sealing properties of the film.

3. Excessive Filling

If the pod is filled beyond its appropriate capacity, internal pressure can increase and place additional stress on the film and seals.

4. Improper Storage Conditions

Excessive heat or humidity can affect pod stability, depending on the formulation and packaging system.

5. Rough Transportation

Compression, vibration, and repeated impact during transportation can increase the risk of damaged pods.

How to Reduce the Risk

A comprehensive solution should include:

• Selecting a suitable PVA film

• Optimizing filling volume

• Controlling sealing parameters

• Checking seal integrity

• Improving moisture protection

• Evaluating transportation conditions

The key is to treat leakage as a system problem—not simply a film problem.

2. Broken or Deformed Pods

Another common issue is pod breakage or deformation.

A pod may appear damaged, flattened, cracked, or partially ruptured.

Possible Causes

Weak Film

If the film does not provide sufficient mechanical strength for the application, it may be more vulnerable during production or transportation.

Improper Pod Structure

Pod size, shape, chamber design, and film tension can all affect mechanical stability.

Filling Pressure

Incorrect filling parameters may place excessive stress on the film.

Packaging Compression

If too many pods are tightly packed together, pressure can cause deformation or damage.

Transportation Impact

Long-distance shipping can expose products to vibration, compression, and repeated handling.

Solutions

Manufacturers should evaluate:

Film Strength → Pod Design → Filling → Sealing → Packaging → Transportation

Testing the finished product under realistic storage and transportation conditions is particularly important for export products.

3. Incomplete Dissolution

Incomplete dissolution is one of the most frequently discussed laundry pod issues.

Consumers may notice film residue or partially dissolved material after washing.

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Why Does It Happen?

Dissolution depends on multiple factors.

1. Water Temperature

Different PVA films are designed for different dissolution conditions.

If the actual washing conditions differ significantly from the intended application, dissolution performance may change.

2. Water Flow

A pod needs sufficient contact with water.

Poor water circulation can limit water contact and slow the dissolution process.

3. Film Characteristics

Film thickness, formulation, and water-solubility characteristics can influence dissolution.

4. Pod Placement

If the pod becomes trapped inside clothing or stuck in a poorly circulated area of the washing machine, water contact may be reduced.

5. Detergent Formulation

The detergent inside the pod can also affect the interaction between the film and water.

How to Improve Dissolution

Manufacturers can optimize:

• PVA film selection

• Film thickness

• Pod structure

• Detergent formulation

• Sealing design

• Product instructions

The important point is that film dissolution and detergent formulation should be evaluated together.

4. Sticking Between Pods

Sometimes pods stick to each other during storage or transportation.

This can create:

• Clusters of pods

• Damaged film

• Difficult separation

• Poor product appearance

• Increased risk of leakage

Why Does Sticking Happen?

One major factor is moisture.

PVA film is water-soluble, which means environmental humidity needs to be carefully controlled.

Other factors may include:

• High storage humidity

• Temperature fluctuations

• Insufficient packaging protection

• Pods touching each other under pressure

• Formula migration

• Inadequate drying or conditioning

Solutions

Brands and manufacturers should consider:

Moisture Control + Appropriate Packaging + Storage Conditions + Production Control

Packaging should provide appropriate protection against environmental moisture while maintaining the intended product stability.

5. Clumping

Clumping can occur when multiple pods become stuck together and form a larger mass.

This problem is particularly undesirable because it can affect both product appearance and usability.

Common Causes

• High humidity

• Temperature fluctuations

• Poor moisture barrier packaging

• Excessive compression

• Improper storage

• Unstable product conditioning

How Can It Be Prevented?

The first step is identifying where the problem occurs.

Does clumping happen:

Immediately after production?

During packaging?

After warehouse storage?

During transportation?

After reaching the customer?

The answer can help determine whether the root cause is related to:

Production → Packaging → Storage → Transportation

Rather than simply changing the detergent formula.

6. Why PVA Film Selection Matters

Many laundry pod quality problems are closely related to PVA film performance.

However, choosing a film should not be based only on price.

A suitable PVA film should be evaluated according to:

• Mechanical strength

• Thickness

• Forming performance

• Sealing performance

• Dissolution characteristics

• Formula compatibility

• Storage conditions

• Production equipment

The ideal film is not necessarily the cheapest film.

It is the film that provides the right balance between:

Production Stability + Storage Stability + Transportation Stability + Washing Performance

7. Formula and Film Must Work Together

A common mistake in product development is treating detergent formulation and PVA film as two completely independent components.

In reality:

Formula ↔ PVA Film ↔ Pod Structure

are closely connected.

A formulation may perform well in a bottle but behave differently when enclosed in a water-soluble film.

Therefore, during product development, manufacturers should evaluate:

• Film compatibility

• Formula stability

• Sealing performance

• Storage stability

• Dissolution performance

• Pod integrity

This integrated approach can help identify potential problems before mass production.

8. Quality Control Should Cover the Entire Production Process

Quality control should not start only after the pods are finished.

A reliable manufacturing process should monitor multiple stages.

Raw Materials

Check incoming materials and specifications.

↓

Formula Preparation

Maintain consistency between batches.

↓

Film Inspection

Check film characteristics before production.

↓

Pod Forming

Monitor forming accuracy and stability.

↓

Filling

Control dosage consistency.

↓

Sealing

Check seal integrity.

↓

Finished Pod Inspection

Inspect appearance and physical integrity.

↓

Packaging

Ensure proper protection from environmental conditions.

↓

Storage & Transportation Testing

Evaluate product stability under realistic conditions.

9. A Simple Troubleshooting Guide

The key principle is:

Identify the root cause before changing the product.

10. How to Build a More Reliable Laundry Pod

A stable laundry pod requires multiple elements to work together.

Formula

The detergent should meet the desired cleaning and product-positioning requirements.

PVA Film

The film should be compatible with the formula and intended washing conditions.

Pod Structure

The shape and chamber design should support stable forming and sealing.

Filling

The dosage should remain consistent throughout production.

Sealing

The seal needs to provide sufficient integrity for handling, storage, and transportation.

Packaging

The package should provide appropriate protection against environmental conditions.

Quality Control

The entire production chain should be monitored systematically.

Final Thoughts

Laundry pod quality problems rarely come from a single factor.

Leakage, broken pods, incomplete dissolution, sticking, and clumping can result from interactions between:

Formula + PVA Film + Pod Design + Production + Packaging + Storage + Transportation

That's why simply changing one material or one production parameter may not always solve the problem.

A more effective approach is to identify the root cause, evaluate the entire product system, and optimize each stage accordingly.

For laundry pod brands, working with an experienced OEM manufacturer can make this process much easier.

Jingliang Laundry Pod OEM Manufacturing

Jingliang provides laundry pod OEM manufacturing services, supporting brands with customized formulas, fragrances, pod shapes, single-chamber and multi-chamber designs, PVA water-soluble film solutions, dosages, and packaging.

From product development and sampling to filling, sealing, packaging, quality control, and mass production, Jingliang helps brands develop stable and customized laundry pod products.

🌐 https://www.jldetergent.com/
📧 Eunice@polyva.cn
📞 +86 19330232910