Food-grade polyether defoamers are a type of defoamer specifically designed for food processing. Their composition, performance, and usage must strictly comply with the safety standards of the food industry, ensuring both efficient foam elimination or suppression and the safety of food products. Food-grade polyether defoamers are a type of defoamer specifically designed for food processing. Their composition, performance, and usage must strictly comply with the safety standards and regulatory requirements of the food industry, ensuring both efficient foam elimination or suppression and the safety of food products. Below is a detailed introduction:

I. Core Features and Advantages

1. High Safety

   • Raw materials are mostly food-grade polyoxyethylene-polyoxypropylene block copolymers (such as polyether polyols), which undergo rigorous toxicological testing, are non-irritating, have no residual toxicity, and meet the safety requirements for food contact materials.
   • They do not react chemically with components in food (such as proteins, fats, and sugars) and do not affect the flavor, color, or nutritional content of food.

2. Defoaming and Foam Suppression Performance Suited for Food Processing

   • Effectively addresses foam generated during food processing due to stirring, fermentation, boiling, etc. (e.g., beer fermentation, soybean milk boiling, juice homogenization).
   • Long-lasting foam suppression prevents issues such as ingredient overflow and reduced production efficiency caused by recurring foam during processing.

3. Good Compatibility

   • Highly compatible with aqueous, oil, or emulsion systems (e.g., beverages, sauces, dairy products), minimizing issues like stratification or oil floating, and preserving food texture (e.g., mouthfeel, smoothness).

4. Resistance to High Temperatures and Acids/Alkalis

   • Adaptable to high-temperature environments in food processing (e.g., boiling, sterilization at 100-130°C) and a certain pH range (e.g., acidic juices, alkaline pasta processing), with stable performance.

II. Main Components and Types

• Core Components: Block copolymers based on polyoxyethylene (EO) and polyoxypropylene (PO), with adjustable EO/PO ratios and polymerization degrees to suit different food systems.
• Common Types:
  • Polyol-type polyethers: e.g., glycerol polyethers, sorbitol polyethers, commonly used in baking and dairy products.
  • Fatty acid ester polyethers: e.g., polyoxyethylene fatty acid esters, suitable for oily food systems (e.g., sauces, fried food processing).

III. Typical Application Scenarios

1. Beverage and Drink Processing

   • Fruit and vegetable juices: Eliminate foam generated during juicing and homogenization to prevent overflow during filling and ensure product clarity.
   • Carbonated drinks and beer: Suppress foam during fermentation to prevent excessive pressure in fermentation tanks and reduce residual bubbles in the final product.

2. Dairy Product Production

   • Milk and yogurt: Defoam during stirring and fermentation to prevent uneven whey separation and ensure uniform product texture.
   • Ice cream: Suppress foam during slurry mixing to prevent air pockets in the final product and enhance smoothness.

3. Baking and Pastry

   • Bread and cakes: Defoam during dough mixing and fermentation to prevent oversized air pockets in the final product and improve fluffiness.
   • Noodles and dumpling wrappers: Reduce foam during dough kneading to prevent abnormal stickiness and facilitate shaping.

4. Other Food Processing

   • Soy products (tofu, soybean milk): Defoam during boiling to prevent overflow and reduce residual bean odor in the final product.
   • Sauces (ketchup, salad dressing): Defoam during homogenization and stirring to ensure smoothness and eliminate graininess.