China’s Engineering Plastics Substitution Initiative

EMAA is the methacrylic-acid analogue of EAA and is widely used as a tie layer in aluminum-foil lamination and co-extruded multilayer films. The domestic reference grade offers comparable adhesion to aluminum and EVOH substrates with a mid-range melt index suitable for both extrusion coating and cast film tie-layer positions.

When to Choose

Choose domestic EMAA when the application is foil lamination for food packaging, toothpaste tube, or aseptic carton and the volume justifies a domestic supply chain. For high-temperature or high-humidity service, validate with the business manager for grade-specific limits.

Reference grade: EMAA-N15 · Manufacturer: Domestic manufacturer (公开目录) · 国产 · Properties: 10% MAA · 8 MI · Tie layer · General coating

Sierbang (a listed Chinese petrochemical group in Lianyungang) has emerged as a major domestic EVA supplier for the photovoltaic encapsulant market. The PV-3300 grade targets solar film applications with 33% VA content — a sweet spot for fast cure and reliable crosslink density in both PERC and TOPCon module constructions.

When to Choose

Choose Sierbang EVA when the project specifies a domestic solar encapsulant supply, the lead time pressure is below 8 weeks, and the module line is calibrated for fast-cure EVA. For POE or co-extruded EPE structures, consider imported alternatives.

Reference grade: EVA PV-3300 · Manufacturer: Sierbang (盛虹斯尔邦) · Properties: 33% VA · 30 MI · Solar encapsulant grade

Zhejiang NHU is a major Chinese specialty chemicals group with growing PPS polymerization capacity. The G40 grade is a 40% glass-fiber reinforced PPS targeting under-hood automotive connectors, industrial heat-resistant housings, and SMD connector bodies — historically dominated by DIC and Chevron Phillips legacy grades.

When to Choose

Choose NHU-PPS-G40 for under-hood automotive connector bodies, industrial heat-resistant housings, and SMD connectors where domestic supply chain and 4-6 week lead time are valued. For continuous service above 220 °C or food-contact applications, validate with the business manager.

Reference grade: NHU-PPS-G40 · Manufacturer: Zhejiang NHU (新和成) · Properties: 40% glass fiber · Heat-resistant · Domestic supply

Shenma Industry is the largest Chinese PA66 manufacturer and a long-standing supplier to automotive and industrial markets. The EPR27 grade is a 30% glass-fiber reinforced heat-stabilized PA66 with comparable tensile and impact performance to imported mid-range grades at a 15-25% cost advantage.

When to Choose

Choose Shenma EPR27 for automotive structural brackets, industrial machinery housings, and any application where cost-per-part is the primary driver and the temperature window is below 180 °C continuous. For glass-filled content above 50% or hydrolysis-stabilized variants, request a quote from the business manager.

Reference grade: EPR27 · Manufacturer: Shenma (神马) · Properties: 30% glass fiber · Heat-resistant · Cost-effective

Yunda POM M90 is a general-purpose copolymer-grade polyoxymethylene used in gears, bearings, and precision mechanical parts. Domestic supply offers reliable inventory and stable mechanical properties for non-critical engineering applications.

When to Choose

Choose Yunda POM M90 for gears, bearings, fasteners, and general mechanical parts where the volume justifies a domestic supply chain and the application is below 100 °C continuous service. For FDA-contact or low-friction-modified grades, request a quote from the business manager.

Reference grade: M90 · Manufacturer: Yunda (云达) · Properties: Copolymer · Standard · 国产

Sinopec T30S is a high-volume homopolymer polypropylene used in packaging, general injection molding, and industrial parts. Domestic supply chain is mature, with multiple production bases and stable quarterly output.

When to Choose

Choose Sinopec T30S for general injection molded parts, packaging applications, and woven products where domestic supply security is a priority. For random copolymer (PPR) or impact copolymer specifications, request a quote from the business manager.

Reference grade: T30S · Manufacturer: Sinopec (中石化) · Properties: Homopolymer · Standard · 国产

Reading:When the project is cost-driven AND lead time sensitive → domestic. When the project requires high-temperature continuous service (PPS, PPA above 200°C, PEEK) or specialized qualification → imported. Most OEM and Tier-1 projects fit the domestic branch after PPAP/qualification revalidation.