Chloe Zhang
Food-grade plastic is any plastic that is safe for food consumption and drinks. Food-grade plastic has perfect wear resistance, flexural modulus, high strength, and excellent dimensional stability. Food-grade plastic is also recyclable. However, food-grade does not necessarily mean food-safe. Food-safe plastics are products specifically designed for food contact and are safe for consuming, carrying, and storing food. These products are tested and approved by the FDA for direct contact as they do not pose any harmful impact on human health. Food-safe plastic bottles include code numbers 2, 4, and 5 for storage as they are food-grade. Code number 1 is safe for single use. HDPE, LDPE, and PP plastics (resins #2, #4, and #5) are the most common and trusted FDA-approved options for food contact and storage.
| Characteristics | Values |
|---|---|
| Food-grade rating | 1-7 |
| Food-safe rating | 2, 4, 5 |
| Food-grade materials | Any BPA-free and less chemically concentrated material |
| Food-safe materials | Products designed for food contact |
| Food-grade uses | Containers, tools, equipment, supplies, conveyor parts, feed pipes, tubes, scraper blades, cutting dies |
| Food-safe uses | Consuming, carrying, storing food |
| Food-grade properties | Wear resistance, flexural modulus, high strength, excellent dimensional stability |
| Food-safe properties | Prevent contamination or health risks |
| Recyclable | Yes |
| Additives | Yes, to enhance appearance and performance |
| Reuse | No |
| Heat | No, can cause toxins to contaminate food |
| Sunlight | No, can cause toxins to contaminate food |
| Microwave | Yes, if polypropylene or polypropylene fabric |
| Dishwasher | No, can break down plastic faster |
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What You'll Learn
Food-grade plastics are BPA-free and less chemically concentrated
Food-grade plastics are materials that can be used for food consumption and drinks without affecting our health. They are FDA-compliant, meeting all the requirements and guidelines for direct contact with food. Food-grade plastic has perfect wear resistance, flexural modulus, high strength, and excellent dimensional stability.
Food-grade plastics are not the same as food-safe plastics. Food-safe plastics are products specifically designed for food contact and are safe for consuming, carrying, and storing food. Food-safe materials are tested and approved by the FDA for direct contact as they do not pose any harmful impact on human health. Food-safe materials are also used as intended to prevent contamination or health risks. For example, a plastic container manufactured for dry cereal may not be able to safely store hot soup. The heat can break down the chemical bonds of the plastic, causing toxins to contaminate the food.
To avoid exposure to BPA, select plastics with recycling symbols 2, 4, and 5, which are the safest. These plastics are less likely to leak toxins when breaking down. They are also more rigid and impact-resistant than other food-grade plastics. Examples of products made with these plastics include peanut butter jars, medication bottles, and dairy containers.
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Food-safe plastics are designed for food contact
Food-safe plastics are designed to prevent contamination and health risks when used for food contact. They are different from food-grade plastics, which are materials that are safe to come into contact with food or be consumed, but may not necessarily be safe for every type of food or use case. For example, a plastic container that is manufactured for dry cereal may not be able to safely store hot soup.
Food-safe plastics are reviewed and studied by the Food and Drug Administration (FDA)'s Division of Food Contact Notifications, which is made up of scientists, chemists, and toxicologists. These experts perform tests to determine if food-contact substances meet strict guidelines, including outlining the types of food and temperatures the materials can withstand, as well as their ability to withstand proper cleaning methods.
The FDA has determined that some plastics, such as HDPE, LDPE, and PP plastics (resins #2, #4, and #5), are safe for food contact and storage. These plastics are commonly used for beverage bottles, butter containers, food storage buckets, bread bags, and more. They are known for their chemical resistance, preventing toxins from leaching into food.
On the other hand, plastics with recycling symbols #3 and #7 may contain Bisphenol A (BPA), an industrial chemical that can seep into food and beverages. While the FDA has stated that the levels of BPA that people are typically exposed to from food packaging are safe, there are ongoing studies and concerns about the potential health effects of BPA.
It is important to note that food-safe plastics must be used as intended to ensure safety. For example, some plastics are meant for single-use only and become unsafe if reused or stored in the sun, as they may start to leak toxins. Additionally, certain plastics should be kept away from extreme heat sources like ovens, microwaves, and dishwashers to prevent chemical leaching.
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HDPE, LDPE, PP plastics are FDA-approved
The Food and Drug Administration (FDA) is responsible for setting standards for the safe production, storage, and packaging of food, beverages, and drugs. FDA-compliant materials meet all the requirements and guidelines for direct contact with food.
HDPE, LDPE, and PP plastics (resins #2, #4, and #5) are FDA-approved for food contact and storage. They are the most common and trusted options for food packaging and storage.
HDPE, or High-Density Polyethylene, is the most common household plastic. It is used to make beverage bottles, butter containers, cereal box liners, and thicker food storage buckets. Recycled HDPE is reviewed by the FDA on a case-by-case basis, as recycling can sometimes make it unsafe for food contact. HDPE is chemically resistant and provides resistance to mold, mildew, and corrosion, preventing toxins from leaching into food.
LDPE, or Low-Density Polyethylene, is similar to HDPE but less rigid, making it perfect for squeeze bottles or plastic film like cling wrap and six-pack rings. It is also chemically resistant and does not leach harmful toxins when used to store food at a variety of temperatures.
PP, or Polypropylene, is ranked at #5 and is FDA-approved for food contact. It is a safer alternative to most other plastics, with a high heat tolerance. It can be used to heat beverages or foods without leaching. It is also microwave-safe and non-volatile, meaning it will not react with any type of food stored in it. Polypropylene is generally used for single-serve items like yogurt cups and cream cheese containers. It is lightweight, flexible, and durable, making it ideal for repeated use.
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Plastic containers have food-grade ratings from 1-7
Plastic containers have food-grade ratings from 1 to 7, which indicate their safety for food storage. These ratings are typically found at the bottom of the containers. Food-grade plastic is non-toxic and complies with the safety guidelines provided by authorities, such as the Food and Drug Administration (FDA). The FDA conducts tests to determine whether the plastic products meet their strict guidelines for food safety.
The ratings help consumers identify the safest options for storing food and prevent accidental toxin ingestion. Plastic grades 2, 4, and 5 are widely recognised as the safest for food storage. These plastics can be used without affecting our health and are FDA-approved. They are commonly used in products such as water bottles, medical jars, soda bottles, and peanut butter jars.
On the other hand, plastics with ratings of 3 and 7 should be avoided for food storage as they are known to leak chemicals into the food. Plastic number 1, often used in beverage bottles and food containers, is generally safe for single use only. If reused or exposed to sunlight, it can become unsafe and leak toxins.
It is important to note that food-grade and food-safe plastics are not interchangeable terms. While every food-safe material is food-grade, not every food-grade material is necessarily food-safe. For example, some plastics may be safe for dry food storage but not for storing hot liquids, as heat can break down chemical bonds and cause toxins to contaminate the food.
Additionally, certain plastics like polypropylene (PP) are safe for microwave use due to their high heat resistance, while others like polystyrene (Styrofoam) should be avoided in the microwave as they can leak toxins when heated. Understanding these ratings helps consumers make informed choices to ensure food safety and reduce potential health risks associated with plastic.
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Food-grade plastics are recyclable
Food-grade plastics are plastics that are safe for food consumption and drinks. They have perfect wear resistance, flexural modulus, high strength, and excellent dimensional stability. Food-grade plastics are recyclable, but the recycled materials must meet specific guidelines to be deemed food-safe.
The Food and Drug Administration (FDA) is responsible for determining how materials may act when in contact with food. The FDA's Division of Food Contact Notifications office, which is made up of scientists, chemists, and toxicologists, performs studies and tests to decide if food-contact substances meet strict guidelines. These guidelines include outlining the temperature and types of foods the materials can come in contact with, as well as if those items can withstand proper cleaning methods.
The FDA has outlined specific concerns regarding the use of post-consumer recycled (PCR) materials, including plastic. The FDA's main safety concerns are:
- Contaminants from the PCR material may appear in the final food-contact product made from the recycled material.
- PCR material may not be regulated for food-contact use and may be incorporated into the food-contact article.
- Adjuvants in the PCR plastic may not comply with the regulations for food-contact use.
To address these concerns, the FDA considers each proposed use of recycled plastic on a case-by-case basis and issues informal advice on whether the recycling process is expected to produce PCR plastic of suitable purity for food-contact applications. Manufacturers of food packaging must evaluate processes for incorporating PCR plastic into food packaging and submit a complete description of the recycling process, including the source of the PCR plastic and any source controls in place to ensure that only plastic that initially complied with the applicable regulations is recycled.
Some specific examples of food-grade plastics that are recyclable include:
- HDPE (High-Density Polyethylene): HDPE is a common recyclable plastic that is FDA-approved and food-safe. It has chemical-resistant properties and provides resistance to mold, mildew, and corrosion. HDPE is often used in household food packaging due to its lightweight yet extremely durable nature.
- LDPE (Low-Density Polyethylene): LDPE has a lower tensile strength than HDPE and is used to make more flexible food-grade products like bread bags and produce bags. It is ranked as number 4 on the recycling number chart.
- Polypropylene (PP): Polypropylene is an FDA-approved food contact plastic, often used for single-serve items like yogurt cups and syrup packets. It has a high melting point, making it safe for use in the microwave and dishwasher. It is lightweight, flexible, and resistant to breaking, making it ideal for reusable containers.
- Polyethylene Terephthalate (PET): PET is a food-grade plastic with great wear resistance, strength, and stability. It is used for single-serve beverage bottles, vitamin bottles, and condiment bottles. PET is safe for one-time usage but can leak toxins if reused or stored in the sun.
- Polystyrene: Polystyrene is FDA-approved as a food-grade material and is used to make Styrofoam cups, takeout containers, egg cartons, and plastic utensils. However, studies have shown that it may leak the chemical compound styrene into food products, especially when heated in the microwave.
While food-grade plastics are recyclable, it is important to note that not all recycled plastics are suitable for food-contact applications. The recycled materials must undergo thorough testing and meet strict guidelines to ensure they are safe for food consumption.
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Frequently asked questions
Food-grade plastics are any BPA-free and less chemically concentrated materials that do not release harsh chemicals or toxins when coming into contact with food. They are also used for food processing equipment like conveyor parts, feed pipes and tubes, scraper blades, and cutting dies.
Food-safe plastics are products specifically designed for food contact and are safe for consuming, carrying, and storing food. Food-safe materials won't create a food safety hazard when used as intended. Food-grade materials are generally better for long-term storage.
Food-grade plastic containers come with a food-grade rating on the bottom that ranges from 1 to 7. Plastic grades 2, 4, and 5 are the safest for food storage.
HDPE, LDPE, and PP plastics (resins #2, #4, and #5) are the most common and trusted FDA-approved options for food contact and storage. Polypropylene (PP) is a safe type for microwave use, while polystyrene (Styrofoam) can leak toxins when heated. Polyvinyl chloride (PVC) is a popular chemically and biologically resistant plastic.
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