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TAISOX® EVA 7350M

FDA-grade EVA 7350M with 18% VA content, MFI 2.5. In-stock for April arrival. Global shipping from 6 China warehouses. Suitable for gaskets and crosslinked foam soles.

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TAISOX® EVA 7350M Application Whitepaper: Key Selection for Shoe Foaming & Gaskets

In extrusion-based elastomer applications, achieving the right balance between flexibility, thermal stability, and chemical resistance often requires a carefully selected copolymer. TAISOX® EVA 7350M – an ethylene-vinyl acetate copolymer manufactured by Formosa Plastics Corporation, Taiwan – addresses these demands with an 18% vinyl acetate content and a melt flow index of 2.5 g/10min. This grade is designed for crosslinked foaming and gasket extrusion, with documented FDA compliance under 21 CFR 177.1350.

From our experience supplying engineering thermoplastics across food packaging, footwear, and industrial sealing sectors, we observe that processors frequently struggle with two issues: inconsistent VA content leading to poor foam cell structure, and inadequate low-temperature flexibility for gaskets. TAISOX 7350M solves both through a high-pressure polymerization process that uniformly incorporates VA into the polyethylene backbone. One customer producing refrigerated container gaskets reported that the -70°C brittleness temperature of this grade eliminated cracking failures during winter shipping trials.

This landing page provides verifiable technical data, real-world application references, and current inventory status (April arrival now ready for allocation).

Product Specifications

Property	Test Method	Value	Unit
Density	ASTM D1505	0.938	g/cm³
Melt Flow Index (190°C, 2.16kg)	ASTM D1238	2.5	g/10min
Vinyl Acetate Content	Internal method	18	wt%
Hardness – Shore A	ASTM D2240	88	-
Hardness – Shore D	ASTM D2240	38	-
Tensile Strength at Yield	ASTM D638	45	kg/cm²
Tensile Strength at Break	ASTM D638	150	kg/cm²
Elongation at Break	ASTM D638	800	%
Melting Temperature (DSC)	Internal method	84	°C
Brittleness Temperature	ASTM D746	-70	°C
Vicat Softening Point	ASTM D1525	60	°C

The 800% elongation at break indicates high deformation capacity before rupture – critical for snap-fit gasket designs and deep-profile foam shoe soles. Melting point at 84°C allows processing on conventional extrusion lines without specialized cooling sections.

Key Properties

FDA food contact compliant – Meets 21 CFR 177.1350 for repeated-use articles. No secondary purification needed for gaskets in food processing equipment.
Crosslinkable through peroxide or radiation – The 18% VA content provides sufficient tertiary hydrogen sites for efficient crosslinking. Foaming agents such as azodicarbonamide (ADC) decompose evenly within the melt range.
Low-temperature ductility to -70°C – Retains flexibility in freezer environments. One industrial seal manufacturer replaced a higher-VA (28%) grade with 7350M and achieved the same low-temperature performance at 12% lower material cost.
High melt strength for profile extrusion – MFI 2.5 sits in the medium-low range, producing stable extrudate swell and dimensional accuracy for gasket cross-sections from 2mm to 15mm.
Chemical resistance against dilute acids, alkalis, and oils – Outperforms many thermoplastic elastomers (TPEs) in dairy sanitation wash-down cycles (mild alkaline detergents at 60°C).

Applications (Anonymized Case Examples)

Case 1: Industrial Gasket Extruder – Food Processing Equipment

A manufacturer of automated bottling lines in Shandong province experienced gasket swelling and surface tackiness when using a generic EVA with 22% VA. Switching to TAISOX 7350M eliminated tackiness after autoclave sterilization (121°C, 30 minutes). The lower VA content reduced polar interactions with food acids. Throughput on their 90mm single-screw extruder increased by 11% due to the narrower molecular weight distribution.

Case 2: Crosslinked Foam Sole Producer – Sports Footwear

A Vietnam-based footwear OEM producing midsoles for walking shoes needed consistent cell structure across seasonal temperature variations. With 7350M, the foam density variation stayed within ±0.02 g/cm³ across 50 production batches. The 84°C melting point allowed blending with 15% ethylene-octene elastomer (POE) to fine-tune rebound resilience without retooling their foaming press.

Case 3: Wire and Cable Filler (Non-nuclear application)

While not the primary target application, one customer used 7350M as a flame-retardant filler compound after blending with 60% aluminum trihydrate (ATH). The 2.5 MFI enabled 30% higher filler loading compared to a 5 MFI grade, reducing compound cost per meter by 8%.

Comparison: TAISOX 7350M vs. Common EVA Grades

Property	7350M (18% VA)	General Purpose EVA (12% VA)	High-VA EVA (28% VA)
Flexibility	High	Moderate	Very high
Low-temp brittleness (°C)	-70	-40	-80
Tensile strength at break (kg/cm²)	150	120-130	100-110
Crosslinking efficiency	High	Medium	Very high
Food contact approval	Yes (FDA)	Varies	Yes (some grades)
Typical price index	1.0	0.85	1.25

In our experience, 18% VA is the “sweet spot” for applications requiring both extrusion stability and crosslinked foam resilience. Grades below 15% VA produce stiffer foam with lower rebound; grades above 22% VA tend to stick to cooling rolls during extrusion.

Supply Chain & Logistics – Qingdao Prime Union Trade Co., Ltd.

With over 20 years in engineering plastics distribution, we maintain direct supply partnerships with Formosa Plastics, Hanwha Total, Hyosung, Chimei, and SABIC. For TAISOX EVA 7350M, we operate the following logistics advantages:

Six owned warehouses in Qingdao, Shanghai, Guangzhou, Tianjin, Chongqing, and Shenzhen. Combined EVA inventory exceeds 500 metric tons across grades.
April arrival confirmed – 220 metric tons of 7350M currently in transit, ETA Qingdao port April 25-30. Partial allocations (as low as 5 tons) available for immediate pre-order.
Bonded trade support – Process goods through free trade zones without immediate duty payment. We handle both processing trade (inward/outward processing) and general trade documentation.
In-house modification – Qingdao Primetech Plastics Co., Ltd., our compounding facility, can supply pre-blended 7350M with color masterbatches, slip agents, or foaming aids. Minimum modification batch: 500 kg.
COA with every shipment – Certificates of Analysis include melt index, VA content, and density from Formosa’s QC lab. Third-party testing (SGS, TÜV) available upon request.

We have supplied this grade to over 50 customers in the past 18 months, including gasket extruders in Europe (via Rotterdam transshipment) and foam sole manufacturers in Southeast Asia. Current lead time for in-stock material is 24 hours for domestic China delivery; international air or sea freight scheduled within 3 working days.

Frequently Asked Questions

Q: What is the typical lead time for TAISOX 7350M?
A: For the April arrival batch, material can be dispatched from Qingdao warehouse by May 5. Regular stock items ship within 24 hours after payment confirmation. International sea delivery to major ports (Rotterdam, Los Angeles, Busan, Ho Chi Minh) takes 15-25 days depending on shipping line.

Q: Can I request a free sample before placing a bulk order?
A: Yes. We provide 5kg samples free of charge (customer covers shipping). Sample orders are processed within 48 hours. Request a sample via our contact form – specify extrusion or foaming application so we can advise on processing parameters.

Q: Does TAISOX 7350M have RoHS and REACH compliance?
A: Formosa Plastics provides REACH SVHC declaration and RoHS compliance letter upon request. The grade contains no restricted phthalates, lead, cadmium, or mercury. For medical device applications, additional biocompatibility testing (ISO 10993) is the customer’s responsibility.

Q: What is the minimum order quantity (MOQ) for bonded trade?
A: For bonded warehouse transfer (e.g., from our Qingdao FTZ to your bonded factory), MOQ is 5 metric tons. For general trade direct delivery, MOQ is 1 metric ton. For processing trade requiring manual customs clearance, MOQ is 10 metric tons.

Q: Can you provide a Certificate of Analysis (COA) before shipment?
A: Yes. We email the batch-specific COA (including MFI, density, VA%, and tensile data) within 24 hours of order confirmation. If you require additional tests (e.g., residual peroxide content, gel count), we can arrange at third-party lab cost.

Q: How should TAISOX 7350M be dried before extrusion?
A: In most cases, no drying is required because EVA absorbs less than 0.1% moisture at 50% RH. If stored in open bags for >3 months, dry at 60°C for 2 hours in a dehumidifying dryer. Avoid temperatures above 80°C to prevent pre-crosslinking.

Conclusion

TAISOX® EVA 7350M delivers a proven combination of FDA compliance, low-temperature toughness, and consistent crosslinking behavior for gasket extrusion and foam footwear applications – with April inventory now available from Qingdao Prime Union’s national warehouse network.