FAQ – Food Grade Cationic Rosin Emulsion

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1. Is this cationic rosin emulsion safe for food-contact paper?

Q: Is your food grade cationic rosin emulsion suitable for food packaging applications?

A:Yes. Our food grade cationic rosin emulsion is specifically developed for food-contact paper and paperboard, using carefully selected raw materials that meet food safety requirements commonly referenced by FDA and EU food packaging regulations. Compliance documents and statements can be provided upon request.

2. Which food packaging applications is it typically used for?

Q: What types of food-contact paper products can use this rosin size?

A:It is widely used in:

  • Paper cups and bowls
  • Food wrapping paper
  • Grease-resistant paper
  • Food-grade cardboard and linerboard
  • Disposable food service paper products

The product ensures effective internal sizing without affecting food safety or paper odor.

3. How does cationic rosin emulsion compare to AKD or ASA for food packaging?

Q: Why choose cationic rosin size instead of AKD or ASA?

A:Compared with AKD or ASA, cationic rosin emulsion:

  • Provides faster sizing development
  • Has better process stability in acidic to weakly neutral systems
  • Requires simpler machine control
  • Reduces risks of hydrolysis and deposits

This makes it especially suitable for food-grade paper mills seeking stable and controllable sizing performance.

4. Does it work in neutral or slightly alkaline systems?

Q: Can this rosin emulsion be used in neutral papermaking?

A:It performs best in acidic to weakly neutral systems (pH 4.5–6.5).
For fully alkaline systems, AKD or ASA may be more suitable; however, many food-grade paper producers intentionally operate in controlled pH ranges where cationic rosin delivers stable results.

5. Will it affect paper odor, taste, or color?

Q: Is there any risk of odor or taste migration to food?

A:No. The product is made from high-purity refined rosin and food-compliant emulsifiers, ensuring:

  • No abnormal odor
  • No taste transfer
  • Minimal color impact

It is suitable for direct and indirect food-contact paper when used correctly.

6. Is it compatible with other papermaking additives?

Q: Can it be used with starch, fillers, or retention aids?

A:Yes. It shows good compatibility with:

  • Cationic starch
  • PCC / GCC fillers
  • Common retention and drainage systems

Proper addition sequence and dosage control are recommended for optimal sizing performance.

Looking forward to hearing your voice with our experts regarding more details.

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