Application of PP sheet on food packaging tray

Case Background

As consumers’ visual effects and environmental awareness of food packaging continue to improve, the requirements of the food packaging industry for packaging materials are becoming increasingly diversified. A well-known food company hopes to develop a packaging tray for its high-end product line that can meet both product display needs and environmental protection requirements. After in-depth research and comparison, transparent PP sheet and natural color PP sheet were finally selected, and food packaging trays with unique visual effects and practical functions were produced through thermoforming.

Project Challenge

Material selection: How to choose the right PP sheet to ensure food safety while meeting the performance requirements of transparency, toughness, high temperature resistance, etc.
Color matching: How to reasonably match transparent PP sheet and natural color PP sheet to highlight the visual effect of the product and enhance the brand image.
Thermoforming process: How to optimize the thermoforming process to ensure the dimensional accuracy and surface finish of the tray.
Food contact safety: How to ensure that PP sheet meets food grade standards to ensure food safety.

Project Solution

Material Selection: We selected food-grade transparent PP sheet and natural color PP sheet, and optimized the thickness, toughness and other properties of the two materials.
Color Matching: Transparent PP sheet is used for the upper cover of the tray to display the product; natural color PP sheet is used for the base of the tray to provide support.
Thermoforming process: Advanced thermoforming equipment is used to ensure the dimensional accuracy and surface finish of the tray through precise temperature control and pressure regulation.
Food Contact Safety: All PP sheets used meet food grade standards and have passed relevant tests.

Characteristics and Comparison of PP Sheet

Folha PP is a thermoplastic with the following excellent properties:
Boa resistência ao calor: PP sheet has a high melting point and can withstand certain temperature changes, which is suitable for thermoformed food packaging.
Boa resistência química: PP sheet has good corrosion resistance to chemical substances such as acid, alkali, oil and fat, is not easy to react chemically, and ensures the safety of food.
Non-toxic and odorless: PP sheet is a food-grade material, non-toxic and odorless, meets food hygiene standards, and can be safely in contact with food.
Low density: PP sheet has low density and light weight, which is convenient for transportation and use.
Fácil de processar: PP sheet can be processed by various processing methods such as thermoforming and injection molding, and can be made into food packaging trays of various shapes.

Clear PP sheet:
Advantages: High transparency, can clearly display products and improve product grade; high temperature resistance, can withstand high temperature sterilization; stable chemical properties, not easy to react with food.
Disadvantages: easy to scratch, poor wear resistance.

Natural color PP sheet:
Advantages: good toughness, not easy to deform; strong wear resistance, not easy to scratch; relatively low cost.
Disadvantages: poor transparency, can not display products.

Customer evaluation

Customers are very satisfied with our products and believe that this packaging tray not only improves the grade of the product, but also has the following advantages:
Environmental protection: PP material can be recycled and meets environmental protection requirements.
Safety: Food grade material, safe and reliable.
Beautiful: The combination of transparent and natural color has a unique visual effect.
Practical: Sturdy and durable, protect the product.