Question 1

What is "chemical residue" and what are its hazards to us?

Accepted Answer

"Chemical residue" refers to traces, remnants, or residual substances of chemicals left behind in a process, product, or environment. These chemical residues can originate from various sources such as chemicals, medications, pesticides, cosmetics, food processing, industrial production, environmental pollution, among others. Chemical residues are typically substances that have not fully decomposed, dissolved, or been removed.

Chemical residues can raise several concerns, including:

Food Safety: Residues of pesticides, fertilizers, preservatives, and other chemicals in food processing, agriculture, and aquaculture may be present in food, negatively impacting human health.
Medication Residue: In processes such as pharmaceutical production and medical equipment cleaning, medication residues left in products may cause discomfort or adverse reactions in patients.
Environmental Pollution: Factors such as industrial wastewater, air emissions, and chemical waste disposal can lead to chemical residues in the environment, affecting ecosystems and water sources.
Cosmetics and Personal Care Products: Some cosmetics and skincare products may leave chemical residues on the skin, causing allergies or other skin issues.

Monitoring and managing chemical residues are highly critical in ensuring personal or public health and environmental protection. In the context of dry ice cleaning, our company places particular emphasis on this matter. We do not use any chemical substances in the dry ice cleaning process, ensuring that no chemical residues are left on the cleaned surfaces. This makes dry ice cleaning particularly suitable for industries where residuefree conditions are crucial, such as the food and pharmaceutical industries.

Question 2

What is "dry ice homogeneity"?

Accepted Answer

"Homogeneity" typically refers to a concept in statistics and data analysis, also known as "uniformity" or "homogeneity testing." It is used to assess the variation or dispersion of observed values within a dataset to determine if they are evenly distributed across the entire data range.

Applied to dry ice, it is a key factor in ensuring the performance of dry ice cleaning. In practice, the application of dry ice cleaning requires specific sizes and dry ice densities, tailored to the density each individual customer needs for cleaning. This customization helps avoid incomplete cleaning or damage, and ensures that the generated particle sizes are consistent for optimal cleaning results. In the current market for dry ice cleaning, only Trade Magnate's dry ice manufacturing machines can produce "continuously manufactured homogeneous-sized" dry ice pellets and blocks, boasting a production capacity of 1,000 kg per hour.

Question 3

What is the minimum order quantity for dry ice?

Accepted Answer

For dry ice, our minimum order quantity is 1 kilogram (for self-pickup, additional charges apply for delivery). For other products, which are primarily machines, detailed product descriptions can be found on our website under the "Product Section"

Question 4

Differences between "Direct Pressing," "Dry Ice Pellets," and "Recycled  Dry Ice Re-Pressing"

Accepted Answer

Direct Pressing of Dry Ice: This is a process for manufacturing dry ice pellets (blocks) where a compressor is used to inject liquid carbon dioxide (CO2) into a molding die. The CO2 is then cooled and pressurized to form uniform and regular dry ice pellets (blocks). This process is typically employed for producing high-quality dry ice suitable for various applications, such as food transportation, refrigeration, and special effects. Specialized equipment is often required for different sizes and shapes of dry ice.

Dry Ice Pellets (Dry Ice Particles): Dry ice pellets are generated during the manufacturing of dry ice. These are small particles of solid carbon dioxide, often used for refrigeration and special effects. These particles are usually produced directly through the manufacturing process and may not be perfectly regular in shape, but they are still applicable for various purposes.

Recycled Dry Ice Re-Pressing: This process involves reprocessing used or discarded dry ice fragments to form solid dry ice blocks. It includes repressing waste dry ice shards to create homogeneous blocks. While the primary aim is cost-saving through the reuse of dry ice, this method can lead to irregular shapes and inconsistent quality.

In summary, the dry ice utilized by Trading Excellence undergoes the "Direct Pressing" method, known for its advantages such as slow sublimation, consistent volume with lower weight, and ease of cutting, ensuring customers receive high-quality dry ice.

Question 5

Do Customers Need to Provide Their Own Storage Containers?

Accepted Answer

Yes! Customers are required to provide their own storage containers. The freezing point of dry ice is extremely low, at -78.5 degrees Celsius (-109.3 ℉), and the sublimation loss rate is approximately 2-10% per day, depending on the quality of the storage container and the amount of dry ice stored. We also offer dry ice storage boxes (Thermal Insulated Boxes), including models BB030, BB060, BB100, and BB250, capable of holding 30kg, 60kg, 100kg, and 250kg of dry ice, respectively, and equipped with wheels for easy mobility. For more detailed product information, please refer to our "Product Section" on the website.

Question 6

What is the application for dry ice?

Accepted Answer

Dry ice is widely applicable in various scenarios and uses due to its unique properties, such as extremely low temperature, lack of chemical residues, and non-conductivity. The following provides a brief overview of occasions suitable for the application of dry ice:

Food Transport and Refrigeration: Dry ice is commonly used for transporting food to maintain low temperatures and prevent spoilage. It is also employed in the refrigeration of goods like ice cream and frozen foods.
Special Effects: The smoke effect generated by dry ice is frequently utilized in stage performances, film production, and special effects creation.
Medical and Pharmaceutical: In certain medical and pharmaceutical processes, dry ice is used for the refrigeration and transportation of biological samples, vaccines, and medications.
Cleaning and Decontamination: Dry ice cleaning is effective in removing grease, dirt, and chemical residues from the surfaces of machinery and equipment without leaving any water or cleaning agents behind.
Machining: In machining processes, dry ice is used for cooling tools and parts to reduce wear and extend their lifespan.
Laboratory Applications: Dry ice is employed in low-temperature experiments and the preservation of biological samples, such as DNA and cells.
Ice Cream and Catering Services: Dry ice can be used in the production of ice cream and catering services to create visually appealing effects for customers.
Chemical and Industrial Cleaning: In certain chemical and industrial applications, dry ice is used for cleaning equipment, pipes, and containers.

Our company provides dry ice that is suitable for applications in the mentioned scenarios. If there are situations not covered here, feel free to contact us via email to inquire about its suitability for your specific needs. We are committed to providing the most professional advice based on your requirements.

Question 7

Is dry ice hazardous?

Accepted Answer

The following diagram outlines precautions for the use of dry ice. Please take a look.

Keep away from children
Do not ingest dry ice or place in any food or drink
Do not touch without protection
Maintain the air circulation when place dry ice in vehicles or indoor
Do not preserve dry ice in a hermetic container

Question 8

How does dry ice remove contaminants?

Accepted Answer

Spraying Method: Dry ice particles, when sprayed, rapidly cool the surface of contaminants, causing them to contract and become brittle. A compressive stress wave is generated between the coating and the substrate, and the energy between them is sufficient to overcome the bond strength, resulting in the separation of the coating from the inside out. For coatings with higher toughness or viscosity, such as oil, wax, or butter, the cleaning action of dry ice blasting is similar to the scouring action of highpressure water, removing the grease.

Physical Action of Dry Ice: The physical action of dry ice causes contaminants to detach from the surface without damaging the underlying material.

Question 9

What does "thermal shock effect" and "online cleaning" mean in the  context of dry ice cleaning?

Accepted Answer

Dry ice cleaning utilizes the unique properties of dry ice particles, combining the concepts of thermal shock effect and online cleaning to achieve an efficient, environmentally friendly, and controllable cleaning process. The principles of these two cleaning methods are briefly described below.

Thermal Shock Effect: During the dry ice cleaning process, the thermal shock effect is evident at the contact points between dry ice particles and the cleaned surface. When dry ice particles impact the surface, the pressure change caused by the impact leads to the immediate sublimation of some dry ice particles, releasing energy. This momentary energy conversion helps to remove dirt from the surface, making the cleaning more effective. Most contaminants have weaker bond strength in a heated state, making them easier to remove, with a cleaning speed 3-5 times faster than in a cool state.

Online Cleaning: Dry ice cleaning is typically performed on-site, and the sublimation of dry ice particles upon impact eliminates the need to collect and recover waste. Hence, it allows for direct online cleaning. Online cleaning refers to the process where machines or molds do not need to be disassembled, and the dirty parts can be cleaned directly, saving downtime and the time and effort required for disassembly and reassembly. In contrast, using sandblasting involves the issue of sand particle recovery, making it unsuitable for online cleaning and incurring additional manpower and time costs.

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