What testing procedures are required for disposable paper cups? (Part 2)

Do you ever have this kind of question? ：

What my product should do Which tests ？

These All tests are necessary. Huh?

Finished What's the use? What about that?

Xiaomin answers everyone's questions and clears up any confusion.

Based on their purpose, they can be categorized into: cold drink cups, hot drink cups, and ice cream cups.

Based on their coating, paper cups can be categorized into: wax-coated cups, straight-wall double-layer cups, and polyethylene-coated cups.

Today's product selection: Disposable paper cups Polyethylene-coated cup )

The test items required include: specification dimensions, volume, stiffness, leakage, heavy metals, fluorescent substances, decolorization, microorganisms, total migration, potassium permanganate, and formaldehyde.

Remove   Color

The decolorization test involves checking whether the sample’s soaking solution picks up any color, as well as testing if the packaging material or container surface loses its original color by wiping it with cotton soaked in solvents like cold-pressed oil or ethanol—ensuring no color transfers to the cotton.

Xiaomin on Testing: This test helps determine whether there’s a risk of migration from the coloring agents or ink in the printing layer.

Microorganisms

Microbial testing is a method that applies microbiological principles and techniques to examine the types, quantities, and characteristics of microorganisms present in paper cups, as well as their potential impact on human health, in order to determine whether the cups meet quality standards.

Xiaomin on Testing: This test can assess the total colony count in paper cups, as well as detect coliforms, molds, and pathogenic bacteria—including Shigella, Salmonella, and Staphylococcus aureus.

Total Migration Volume

The total migration test involves simulating the contact between food and packaging materials, allowing migratable substances from the packaging to transfer into a food simulant. The total amount of these migrants is then measured through an evaporation-drying-weighting process.

Xiaomin on Testing: Since the inner layer of paper cups is coated with a plastic film to prevent leaks or softening when holding liquids, small molecules from the plastic film may migrate outward during contact with beverages, potentially ending up in the drink and posing risks to the consumer's health.

Potassium permanganate

The potassium permanganate consumption refers to the amount of substances in the paper cup material that can be oxidized by potassium permanganate and subsequently migrate into the soaking liquid. Most of the substances oxidized by potassium permanganate are organic compounds that have migrated out, including polymer monomers, olefins, and other similar materials.     

Xiaomin on Testing: This test can determine whether paper cups contain soluble organic compounds, such as polymers. Low-molecular-weight polymers such as olefins, dimers, trimers, and more ), soluble organic substances entering the human body through liquids may pose health risks to consumers. Therefore, China has established strict regulatory limits for food-contact materials, stipulating that their content must not exceed 10 mg/kg.

A   Aldehyde

Formaldehyde testing refers to the quantitative analysis of formaldehyde present in air, water, food, clothing, wood panels, leather, and other materials, using specific methods or instruments.      

Xiaomin on Testing: This test can determine whether paper cups pose a health risk to humans. Low-quality disposable paper cups often contain harmful substances like formaldehyde, which can negatively impact human health.