Import Expandable Polymeric Sandwich Panels — Buy in wholesale FOB from Supplier in China
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Expandable Polymeric Sandwich Panels
Expandable polymeric sandwich panels from Zhejiang Castchem New Materials Co., Ltd. are manufactured using STMMA-FD technology, a modified polystyrene blend containing 90% polystyrene and 10% methyl methacrylate (MMA), with pentane as the blowing agent above 7%. Unlike standard EPS, this formulation decomposes into 3C + 2CO2 + 4H2 during metal pouring, significantly reducing carbon residue and surface defects in castings. The material is designed specifically for lost foam casting applications where low ash content and controlled gasification are critical to casting integrity.
The STMMA-FD series is engineered to mitigate fold defects in aluminum castings and reduce lustrous carbon porosity in iron castings. Its decomposition temperature is lower than conventional EPS, allowing more complete volatilization before metal solidification. The additive composition does not alter the base polymer structure but alters the gasification pathway, resulting in cleaner cavity formation. These panels are supplied as pre-expanded beads or pre-formed slabs, with no additional binders or coatings applied by the supplier.
Buyers in foundries producing complex aluminum and iron castings use these panels for precision mold cores and patterns. The product is typically ordered in bulk quantities for direct integration into automated foam pattern production lines. Packaging is in sealed polyethylene bags or bulk containers, with no standard minimum order quantity stated. Lead time and incoterms are not specified and must be confirmed directly with the supplier.
| Base polymer | 90% polystyrene, 10% methyl methacrylate (MMA) |
| Blowing agent | Pentane (>7%) |
| Decomposition products | 3C + 2CO2 + 4H2 (per chemical formula) |
| Typical density range | 15-25 kg/m³ (standard for expandable polymeric panels in lost foam casting) |
| Decomposition temperature | Lower than EPS, typically 250-300°C (standard range for MMA-modified beads) |
| Residue after combustion | Significantly lower than EPS (typical industry benchmark for STMMA series) |
| Form | Pre-expanded beads or slab board |
| Typical application | Lost foam casting for aluminum and iron components with high surface finish requirements |
| Packaging | Sealed polyethylene bags or bulk containers (typical for industrial foam bead supply) |
| Storage condition | Dry, ambient temperature, away from direct sunlight (standard for polystyrene-based expandables) |
Zhejiang Castchem New Materials Co., Ltd. is a manufacturer based in Zhejiang Province, China, focused on specialty expandable polymers for foundry applications. The listing shows no verified certifications, no company history, no employee count, and no client references. The supplier's address is provided but lacks contact details or website. Response rate and average response time are not recorded, indicating limited buyer communication history on the platform.
The supplier's product focus is narrow: STMMA-based expandable panels for metal casting. There is no indication of broader product lines, export experience beyond this listing, or third-party quality audits. The technical description provided is specific to decomposition chemistry, suggesting engineering expertise in this niche, but no independent validation of claims is available. Buyers should treat all performance claims as supplier-provided and require independent testing before production use.
| Business Type | Supplier |
| Year Established | Recently Joined |
| Employees | Contact Supplier |
| Annual Revenue | Contact Supplier |
| Main Products | View Products Tab |
| Major Markets | Global |
| Response Time | Contact Supplier |
| Response Rate | New Supplier |
Sourcing Expandable Polymeric Sandwich Panels from Zhejiang Castchem New Materials Co., Ltd. - China Import Guide
Before ordering, verify the exact chemical composition of the STMMA-FD batch by requesting a certificate of analysis showing polystyrene and MMA ratios, pentane content, and residual monomer levels. Confirm the decomposition behavior under simulated casting conditions, as variations in additive concentration can alter gasification speed and residue formation. Do not assume performance based on product name alone.
Lead time and incoterms are not listed and must be confirmed directly. Typical shipping terms for bulk foam beads include FOB China port or CIF destination. Packaging must be moisture-sealed and labeled for hazardous materials if pentane content exceeds local transport thresholds. Confirm whether the supplier handles export documentation, including MSDS and customs declarations for chemical-based products.
Perform incoming quality checks on every shipment: measure bead density, moisture content, and residual carbon after combustion. Use a sieve analysis to confirm particle size distribution matches the agreed specification. Retain samples from each batch for traceability. Request a test report for carbon residue from a certified lab before approving production use. Document all inspection results to support quality audits.
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14 listingsTop Verified Suppliers for Expandable Polymeric Sandwich Panels
30 suppliersBuy Expandable Polymeric Sand in Bulk — Verified Supplier in China
When sourcing Expandable Polymeric Sandwich Panels for your business, securing the right balance of quality and cost is essential. Zhejiang Castchem New Materials Co., Ltd., a verified supplier based in China, offers this product for international export. By purchasing directly from the manufacturer or authorized exporter, buyers can negotiate favorable FOB prices starting at $50/Bags and manage bulk orders with a minimum order quantity (MOQ) of 1 Bags. This product is a staple in the Panels sector with strong demand from importing countries worldwide.
Expandable Polymeric Sand Specifications, Trade Terms & Pricing
Importing Expandable Polymeric Sand requires careful attention to shipping logistics, customs compliance, and secure payment terms. Zhejiang Castchem New Materials Co., Ltd. offers flexible shipping options such as Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. Common payment methods for international B2B transactions include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P). All transactions and RFQs are facilitated through EximNext, a leading online B2B marketplace designed to make cross-border trade secure and efficient.
About Zhejiang Castchem New Materials Co., Ltd. — Supplier in China
Finding trustworthy partners is the foundation of successful importing. The supplier of this Expandable Polymeric Sand has been verified on our platform. Whether you are a distributor, wholesaler, or procurement manager, you can request a free quotation, ask for product samples, and finalize your bulk purchase with confidence. EximNext hosts thousands of verified manufacturers and exporters across 200+ countries. Explore similar products in the Panels category and connect with top-tier exporters on our comprehensive B2B marketplace. Start your sourcing journey today.
Import Expandable Polymeric Sand — Shipping, Logistics & Customs
Importing Expandable Polymeric Sand requires careful attention to shipping logistics, customs compliance, and secure payment terms. Common shipping options include Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. Buyers should verify import duties in their destination country. Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P).
Frequently Asked Questions About Expandable Polymeric Sand
What is the wholesale price of Expandable Polymeric Sandwich Panels?
The current listed wholesale price for Expandable Polymeric Sandwich Panels from Zhejiang Castchem New Materials Co., Ltd. is $50/Bags on FOB terms from China. Prices may vary depending on order volume, packaging, and destination. For the most accurate bulk quote, send a direct RFQ to Zhejiang Castchem New Materials Co., Ltd. through EximNext.
What is the Minimum Order Quantity (MOQ) for Expandable Polymeric Sand?
The supplier, Zhejiang Castchem New Materials Co., Ltd., has set a Minimum Order Quantity (MOQ) of 1 Bags for Expandable Polymeric Sand. For sample requests or smaller trial orders, contact the supplier directly through our platform's inquiry system.
What is the HS Code for Expandable Polymeric Sandwich Panels?
The HS Code classification for Expandable Polymeric Sandwich Panels depends on the specific grade and form. Contact Zhejiang Castchem New Materials Co., Ltd. through EximNext for the exact HS Code and customs documentation required for your destination country.
How can I import Expandable Polymeric Sand from China?
To import Expandable Polymeric Sand from China, negotiate shipping terms (FOB, CIF, or EXW) directly with Zhejiang Castchem New Materials Co., Ltd.. Ensure you have the necessary import licenses for Panels products in your destination country.
Is Zhejiang Castchem New Materials Co., Ltd. a verified supplier?
Yes, Zhejiang Castchem New Materials Co., Ltd. is a verified supplier on EximNext. You can view their complete company profile, business registration details, certifications, and export history before placing a bulk order.
What are the key specifications of Expandable Polymeric Sandwich Panels?
For a complete technical data sheet or Certificate of Analysis (COA), send an inquiry directly to Zhejiang Castchem New Materials Co., Ltd. through EximNext.
What packaging options are available for bulk orders of Expandable Polymeric Sand?
Zhejiang Castchem New Materials Co., Ltd. offers Expandable Polymeric Sand with standard export packaging. Custom packaging, private labeling, and OEM/ODM options may also be available for large wholesale orders.
Which countries import Expandable Polymeric Sand the most?
Expandable Polymeric Sand is actively imported by buyers worldwide. Request a destination-specific CIF or CFR quote from Zhejiang Castchem New Materials Co., Ltd. through our platform.
What certifications does this Expandable Polymeric Sand supplier hold?
Zhejiang Castchem New Materials Co., Ltd. maintains international quality certifications. These ensure that the Expandable Polymeric Sand meets international quality, safety, and regulatory standards required for cross-border trade.
How do I place a bulk order for Expandable Polymeric Sandwich Panels on EximNext?
Click "Request Quotation" on this product page, specify your required quantity, preferred shipping terms, and destination country. Zhejiang Castchem New Materials Co., Ltd. will respond with a detailed wholesale quote including FOB pricing, lead time, and payment options.
What payment methods are accepted?
Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), Documents against Payment (D/P), and Escrow services. Confirm accepted terms directly with Zhejiang Castchem New Materials Co., Ltd..
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