AC blowing agent is the common industrial name for azodicarbonamide, a chemical foaming agent used to create a cellular structure in plastics, rubber, and other polymer-based materials. When heated under controlled processing conditions, it decomposes and releases gas, which forms bubbles inside a softened polymer compound. I recommend evaluating AC blowing agent by decomposition temperature, gas yield, particle size, activation system, and compatibility with the target material rather than selecting only by price.
AC blowing agent is widely considered a high-gas-yield chemical blowing agent for applications such as PVC profiles, EVA foam, rubber sheets, footwear compounds, cable materials, synthetic leather, and selected thermoplastic products. The correct grade depends on the processing temperature, equipment, required density, surface quality, and regulatory requirements of the final product. As a manufacturer and supplier, I help buyers connect the blowing agent specification with the actual formulation and production process.
Azodicarbonamide remains dispersed in the polymer compound until the material reaches its activation range. Under heat, it decomposes and produces gas that expands within the softened material, while the solid decomposition residues remain distributed through the polymer matrix. The resulting cells can reduce material density and provide cushioning, insulation, or a controlled foamed appearance.
Commercial AC blowing agents are commonly supplied as fine powders to promote more uniform dispersion. A conventional AC grade may begin decomposition at approximately 200–210°C, while activated or modified grades can be designed for lower processing temperatures. Exact values vary by formulation, particle size, activator package, and test method, so I advise buyers to confirm the current technical data sheet before setting production conditions.
I commonly see AC blowing agent considered for polymer systems that require chemical foaming rather than mechanical gas injection. The most suitable application depends on the resin’s melt behavior, processing temperature, formulation additives, and required foam density. A laboratory trial is important because the same grade may perform differently in extrusion, molding, calendaring, or compression processes.
AC blowing agent can be used in selected PVC foam products, including profiles, sheets, flooring layers, and synthetic leather structures. In these systems, formulators must balance gas generation with PVC fusion, plasticizer content, stabilizer selection, and surface appearance. Excessive gas generation or poor dispersion may lead to coarse cells, surface pinholes, or dimensional variation.
EVA and certain polyolefin-based compounds may use AC blowing agent to produce lightweight foam sheets, soles, mats, seals, and cushioning components. The formulation must provide sufficient melt strength to retain the gas and prevent cell collapse during cooling. For lower-temperature processes, an activated AC grade or a different blowing-agent system may be more appropriate.
Rubber manufacturers may evaluate AC blowing agent for foam rubber sheets, gaskets, insulation materials, and resilient components. Cure timing is especially important because gas release and rubber crosslinking need to occur in a compatible sequence. I recommend testing the blowing agent with the complete rubber formulation, including curing agents, fillers, plasticizers, and processing aids.
AC blowing agent is not a single universal grade. Suppliers may offer conventional, activated, surface-treated, fine-particle, or application-specific versions. The product name alone does not provide enough information for purchasing, so I suggest comparing the specification, test method, packaging, and recommended use together.
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| Type or option | Typical purpose | Buyer considerations |
|---|---|---|
| Conventional AC grade | General foaming in higher-temperature polymer processing | Check activation temperature, gas yield, and dispersion behavior |
| Activated AC grade | Lower-temperature or more controlled foaming processes | Confirm activator chemistry and compatibility with the formulation |
| Fine-particle grade | Improved dispersion and potentially more uniform cell formation | Evaluate dust handling, mixing equipment, and surface requirements |
| Surface-treated or customized grade | Specific dispersion, handling, or application requirements | Request production samples and application guidance before approval |
Gas yield is another important comparison point. Some AC products are specified at approximately 220–230 mL/g under stated laboratory conditions, but this value is not a guaranteed result in every production line. The actual foam expansion depends on temperature, pressure, residence time, polymer viscosity, mold or die design, and the presence of activators. I therefore treat gas-yield data as a comparative laboratory indicator rather than a direct prediction of finished-product volume.
Before selecting a grade, I recommend requesting a current technical data sheet and, where necessary, a certificate of analysis for the relevant batch. The most useful specifications usually include active content, decomposition or activation temperature, gas evolution, average particle size, moisture, ash or residue, color, and storage conditions. Buyers should also confirm whether the supplier reports values as typical data, guaranteed limits, or test results from a specific batch.
I suggest evaluating a supplier through both technical and commercial criteria. A reliable supplier should be able to explain which grade is suitable for your polymer, processing temperature, target density, and production method. The supplier should also provide consistent product documentation without making unsupported claims about performance, certification, or universal compatibility.
Price should not be evaluated only on a per-kilogram basis. A lower-priced grade may require a higher dosage, create more rejects, or need additional processing adjustments, while a more consistent grade may reduce formulation uncertainty. I recommend comparing total usage cost, trial time, packaging, freight, lead time, technical support, and the cost of production instability.
At Shitong, I approach AC blowing agent sourcing as a formulation and supply-chain decision rather than a simple commodity purchase. I can help buyers organize the required application information, including polymer type, processing method, target density, product color, operating temperature, monthly demand, and destination market. This information supports a more practical grade recommendation and reduces the risk of choosing a product that does not fit the process.
Our support can include product specification review, sample coordination, packaging discussion, export document preparation, and communication about repeat-order planning. When the application is sensitive, I recommend a staged process: first review the technical requirements, then test a representative sample, and finally confirm the commercial specification before regular supply. This approach gives the buyer a clearer basis for approval without promising results that have not been verified in the buyer’s own production environment.
AC blowing agent can be a suitable option when you need chemical foaming for PVC, EVA, rubber, PE, or other compatible polymer systems and your process can control heat, mixing, gas release, and cooling. The best grade is not necessarily the one with the highest gas yield or lowest purchase price; it is the one that delivers the required cell structure, density, appearance, and process stability in your formulation. I recommend beginning with a technical specification review and a controlled sample trial.
For your next step, prepare your polymer type, processing temperature, product dimensions, target density, color requirements, monthly quantity, and destination market. Share these details with Shitong so I can help compare suitable AC blowing agent options, clarify the commercial supply conditions, and support a practical evaluation before you place a bulk order.
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