Heat Resistant Packaging Materials for Milk Products

High-strength packaging bag with improved heat preservation and watertightness. The bag has an outer waterproof layer, outer paper layer, heat-insulation layer, inner paper layer, and inner waterproof layer. Adhesive layers bind the outer and inner layers to the insulation layer. The adhesive is a polyurethane emulsion with tackifiers and impregnating agents that improve adhesion and uniform dispersion. This prevents wrinkling and deformation under pressure. The bag has a composite structure with cushioned layers and waterproof barriers for better insulation and protection.

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Packaging for cooking food in ovens that eliminates human handling between preparation and consumption. The packaging features a paper-based bag with an integrated, heat-activated adhesive strip that seals the open end when folded. The paper material has high vapor permeability (5,000-15,000 cc/m2) and is resistant to cooking temperatures above 520°F. The adhesive strip is specifically designed to bond over the folded edge, creating a sealed package that can be placed in an oven.

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Packaging design for delivering food and beverages that maintains product temperature during transportation while also providing inviolability and ease of delivery closure. The packaging has features like thermal insulation to keep the product at the desired temperature during transport, as well as a unique closure mechanism that allows secure sealing for delivery while being easy to open by the recipient. The closure can have staples or seals to preserve inviolability, but the packaging itself has thermal characteristics to keep the product at the right temperature. This allows delivering perishable items like food and drinks without needing cold chains or ice packs.

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A thermal packaging system that significantly enhances the thermal performance of conventional containers by incorporating advanced materials and design features. The system enables controlled temperature retention for extended periods while maintaining optimal conditions for food preservation, pharmaceuticals, and other sensitive materials.

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Insulated milk packaging box with improved temperature retention compared to conventional milk cartons. The box has a foamed insulating layer made of a polyolefin resin with a microporous structure. The microporous structure has an opening ratio of 0-80% and pore sizes of 0.01-2 mm. This provides insulation to keep milk at optimal temperature after sterilization without requiring refrigeration. The microporous structure allows gas exchange while preventing liquid leakage. The insulating layer is made from a non-toxic, environmentally friendly material that can be heat sealed and reused.

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A packaging solution for food transportation that combines thermal insulation and enhanced hygiene through a novel corrugated cardboard design. The innovative packaging features a specially engineered corrugated structure that incorporates integrated thermal protection layers, as well as advanced moisture management features to prevent food spoilage during transportation. This design addresses the critical issues of thermal stability and food hygiene that are commonly encountered in food packaging.

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