Blister plastic tableware has become a popular choice in the food service industry due to its lightweight, cost – effectiveness, and versatility. However, one crucial aspect that often concerns both consumers and food providers is its heat resistance. As a blister plastic tableware supplier, I have witnessed firsthand the importance of understanding how this type of tableware performs under different heat conditions. In this blog, I will delve into the science behind the heat resistance of blister plastic tableware, its practical applications, and limitations. Blister Plastic Tableware
The Science of Heat Resistance in Blister Plastic Tableware
Blister plastic tableware is typically made from various types of plastics, each with its own unique heat resistance properties. The most common plastics used in blister packaging for tableware include polypropylene (PP), polystyrene (PS), and polyethylene terephthalate (PET).
Polypropylene is known for its relatively high heat resistance. It can withstand temperatures up to around 120 – 130 degrees Celsius (248 – 266 degrees Fahrenheit) before it starts to soften. This makes it suitable for applications where the tableware may come into contact with moderately hot foods, such as hot soups or freshly cooked meals. The molecular structure of polypropylene consists of long – chain polymers that are relatively stable at elevated temperatures. The carbon – carbon and carbon – hydrogen bonds in the polymer chains can withstand the thermal energy without breaking easily, which gives polypropylene its heat – resistant characteristics.
Polystyrene, on the other hand, has a lower heat resistance. It begins to soften at temperatures around 70 – 90 degrees Celsius (158 – 194 degrees Fahrenheit). This means that it is not ideal for holding extremely hot foods. The structure of polystyrene is a linear polymer with a relatively rigid benzene ring in the repeating unit. The intermolecular forces in polystyrene are not as strong as those in polypropylene, which makes it more susceptible to softening at lower temperatures.
Polyethylene terephthalate has a heat resistance similar to that of polystyrene. It can generally tolerate temperatures up to about 70 – 80 degrees Celsius (158 – 176 degrees Fahrenheit). PET is a semi – crystalline polymer, and its heat resistance is determined by the degree of crystallinity and the strength of the intermolecular forces between the polymer chains.
Practical Applications of Blister Plastic Tableware Based on Heat Resistance
In real – world scenarios, the heat resistance of blister plastic tableware determines its suitability for different food service applications.
For take – out and delivery services, polypropylene blister plastic tableware is often the preferred choice. Many restaurants use polypropylene containers to serve hot foods like stir – fries, curries, and hot sandwiches. These containers can keep the food hot for a reasonable amount of time without deforming. For example, a customer who orders a hot chicken curry for take – out can be confident that the polypropylene container will hold the hot food safely during the journey home. The heat resistance of polypropylene also allows for some degree of reheating, either in a microwave or an oven, as long as the temperature does not exceed its softening point.
Polystyrene blister plastic tableware is commonly used for serving less – hot foods, such as salads, pastries, and cold beverages. For instance, a coffee shop might use polystyrene cups to serve iced coffee or a bakery might use polystyrene trays to display and sell muffins and cookies. Since the food and beverages served in these cases are not extremely hot, the lower heat resistance of polystyrene is not a problem.
PET blister plastic tableware is widely used in the packaging of pre – packaged food items, such as yogurt cups and ready – to – eat fruit salads. These products are usually stored and served at refrigerated or room temperature, so the heat resistance of PET is sufficient for their intended use.
Limitations of Blister Plastic Tableware in Terms of Heat Resistance
Despite its many advantages, blister plastic tableware does have some limitations when it comes to heat resistance.
One of the main issues is that when the temperature exceeds the plastic’s heat – resistance threshold, the tableware can deform. This not only affects the appearance of the tableware but can also lead to leakage of the food or beverage inside. For example, if a polypropylene container is accidentally placed in a microwave at a very high power for an extended period, it may start to warp, and the hot liquid or food could spill out.
Another concern is the possible release of harmful chemicals when the plastic is exposed to high temperatures. Some plastics, when heated beyond their safe limits, can release monomers or additives that may be harmful to human health. For instance, certain types of polystyrene may release styrene when heated, which is considered a possible human carcinogen by some health organizations. Although the use of safe plastic formulations has reduced this risk significantly, it remains a concern, especially when using plastic tableware with very hot foods.
Testing and Quality Control
As a blister plastic tableware supplier, we take heat resistance very seriously. We conduct rigorous testing on our products to ensure that they meet the required heat – resistance standards.
One of the common tests is the heat – deflection test. In this test, a sample of the plastic tableware is subjected to a specific load while being heated at a controlled rate. The temperature at which the sample deflects a certain amount is recorded as its heat – deflection temperature. This test gives us an indication of how well the tableware can withstand heat under real – world conditions.
We also perform food – contact testing to ensure that the plastic does not release any harmful substances when in contact with hot food. This involves simulating the conditions of food storage and consumption, such as filling the tableware with hot water or a food – like substance and then analyzing the leachates for any potentially harmful chemicals.
Conclusion and Call to Action
In conclusion, the heat resistance of blister plastic tableware varies depending on the type of plastic used. Polypropylene offers relatively high heat resistance, making it suitable for hot foods, while polystyrene and PET are more suitable for less – hot or cold food applications. However, all types of blister plastic tableware have their limitations, and it is important to use them within their recommended temperature ranges.
Aluminium Takeaway Containers with Lids If you are a restaurant owner, a food service provider, or someone in need of high – quality blister plastic tableware, I encourage you to reach out to discuss your specific requirements. We can provide you with detailed information about the heat – resistance properties of our products and help you choose the most suitable tableware for your business. Whether you need tableware for hot or cold foods, we have a wide range of options to meet your needs.
References
- ASTM International. “Standard Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position.” ASTM D648 – 07.
- European Food Safety Authority (EFSA). “Scientific Opinion on the safety of styrene in food contact materials.” EFSA Journal 2016.
- PlasticsEurope. “Polypropylene: Properties and Applications.”
Suzhou YOTO Industrial Co., Ltd
We’re professional blister plastic tableware manufacturers in China, specialized in providing high quality products with low price. We warmly welcome you to buy cheap blister plastic tableware from our factory. Contact us for quotation.
Address: No. 3199, Fenhu National Road, Beishe, Lili Town, Wujiang District, Suzhou City, Jiangsu Province
E-mail: sophia@chuangangfabric.com
WebSite: https://www.yotofoodpackaging.com/
