The application of injection molding in the food field has strict requirements, mainly including the following aspects:

First, material requirements **

1. Plastic raw materials that meet food contact material safety standards must be used.

- For example, commonly used food grade plastics such as polypropylene (PP), polyethylene (PE), etc., they should not contain substances harmful to the human body, such as bisphenol A.

- The material should have good chemical stability and will not undergo chemical reactions during contact with food, causing harmful substances to migrate into the food.

2. The purity and health indicators of plastic raw materials should meet high standards.

- Must not contain impurities, odors or microbial contamination.

Second, production environment requirements **

1. The injection molding production workshop should be kept clean and hygienic, and meet the hygiene standards of food production.

- Regular cleaning and disinfection to prevent dust, bacteria and other contaminants from entering the product.

2. To have a good ventilation system to control the temperature, humidity and air quality in the workshop.

Three, mold requirements **

1. The design and manufacture of molds should be excellent to ensure the dimensional accuracy and surface quality of injection products.

- The product should not have burrs, cracks and other defects, so as not to affect the safety of the food and the tightness of the package.

2. Mold materials should be corrosion and wear resistant, and easy to clean and disinfect.

Four, the production process requirements **

1. Strictly control the injection molding process parameters, such as temperature, pressure, injection speed, etc., to ensure the stability of product quality.

- Excessive temperature may cause plastic decomposition to produce harmful substances, and improper pressure and injection speed may affect the physical properties of the product.

2. To avoid cross-contamination in the production process, the production of different food contact products should be effectively isolated and cleaned.

** Five, quality testing requirements **

1. Strict quality testing of food contact products for injection molding.

- Including physical performance testing (such as strength, tightness), chemical performance testing (such as the amount of harmful substances migration), etc.

2. Testing should be carried out in accordance with relevant national standards and regulations, and qualified products can be put into the market.

For example, plastic bottles used for food packaging, after injection molding production, must go through a series of tests, such as tightness testing, to ensure that liquid food will not leak; Chemical migration tests to verify whether hazardous substances migrate into simulated foods under certain conditions.

In short, the application of injection molding in the field of food must meet strict safety, hygiene and quality requirements to protect the health of consumers.