Bulk engineering plastic resin on Made-in-China traded at US$1.20–3.00/kg in 25 kg bag MOQs and US$2.155–2.789/kg in 5,000 kg container lots as of May 2026, with Xiamen Keyuan Plastic, Xiamen Bocheng Plastic and Shanghai Qishen Plastic Industry anchoring the spot listings [S4][S6]. The spread inside a single 25 kg tier is roughly 2.5×, which tells the buyer that grade (filled vs unfilled, virgin vs reprocessed) drives more price action than freight [S6].
Pricing inside engineering plastic is set by three independent variables: base resin family (PA, POM, PC, PBT, UHMW-PE), additive package (glass fibre, PTFE, MoS₂, carbon black, UV stabiliser), and finished form (pellet, plate, rod, tube, machined part, plastic pallet). Confusing the three is the single biggest reason procurement teams overpay on RFQs — the same nominal polymer can land anywhere in a 4× band depending on which of those variables the seller is quoting.
Resin price bands on Made-in-China, May 2026
The freshest bulk listings on Made-in-China put general-purpose engineering plastic pellets at US$1.20–2.10/kg in 25 kg MOQ (Xiamen Keyuan Plastic) and US$2.50–3.00/kg for a comparable 25 kg tier from Xiamen Bocheng Plastic Material [S6]. Shanghai Qishen Plastic Industry's audited listing for an engineering plastic material in a 5,000 kg MOQ sits at US$2.155–2.789/kg, with ISO 45001:2018 occupational-health certification displayed as a supplier credential [S4]. A fourth Made-in-China category, engineering plastic tube, runs an entirely different price regime: US$1.28–1.99 per 100 m for ANHUI SHENGHANG PLASTIC, US$10.00–30.00/kg for Nantong Kt New Materials' specialty compound, and US$1,600–2,200 per ton for Baoding Lida's heavy-wall tube [S1].
For the same nominal polymer, the ton-lot price band (US$2,155–2,789/t = US$2.155–2.789/kg) and the 25 kg bag band (US$1.20–3.00/kg) overlap, but the 25 kg tier contains specialty grades — glass-reinforced, flame-retardant, lubricated — that the ton tier generally does not [S4][S6]. Buyers should treat the 25 kg and 5,000 kg prices as separate markets, not as a quantity discount on the same grade.
Form-factor premium: pellets vs plates, rods, tubes and machined parts
Form conversion adds a compounding cost layer. Tangyin County Sanyou Engineering Plastic's product line — UHMW-PE plates, rollers, special-shaped products and plastic pipe — sits in a different cost class than bagged pellets because the same UHMW-PE base resin has been extruded, compression-moulded or ram-extruded into a geometric part with downstream scrap rate baked into the unit price [S3]. The supplier's standard product mix (UHMW-PE plate, UHMW-PE roller, HDPE pipe, white HDPE custom profiles) is the typical shape range a Chinese engineering plastic mill runs off the same reactor output [S3].
Tooling is the second multiplier. Made-in-China's "Design Engineering Mould" category lists a 1-piece MOQ at US$0.10–4.90 (Yuyao Zetuo Plastic Products) for simple plastic injection moulds and US$1,000–1,500 per piece (Dongguan Xin Guang Hong Metal & Plastic) for metal-and-plastic combination moulds, both at 1-piece MOQ [S5]. A buyer specifying a custom part should expect the mould to dominate unit cost at low annual volumes; the crossover where amortised mould cost drops below the per-part resin premium typically lands at 5,000–20,000 parts depending on cavity count and steel grade.
MOQ ladder and what each rung actually buys
Made-in-China's MOQ structure for engineering plastic is stair-stepped, not linear. 25 kg rungs (US$1.20–3.00/kg) buy small-batch specialty grades that compounders will not run on a reactor; 5,000 kg rungs (US$2.155–2.789/kg) buy reactor-truck quantities of standard grades [S4][S6]. Tube and pipe rungs are quoted in length (100 m MOQ at US$1.28–1.99 per 100 m) or in tonnage (1 t MOQ at US$1,600–2,200/t) depending on whether the extrusion line is set up for short runs or full-bore production [S1]. The 1 t tube tier is roughly equivalent to US$1.60–2.20/kg, which is below the 25 kg pellet band — confirming that processed-tube pricing on Made-in-China reflects commodity-grade HDPE/PE extrusion rather than the filled or reinforced grades quoted per kg in pellet form [S1].
For procurement planning, the 25 kg rung is essentially a sample-and-development tier (USD-denominated R&D material, not production feedstock), the 5,000 kg rung is the realistic production run, and the 1 t tube rung is the only practical entry point for industrial pipe procurement from Chinese mills [S1][S4][S6]. Mixing RFQs across these rungs without flagging the difference is the most common way buyers get quoted prices that are 2–3× apart on the same drawing.
Supplier clustering and audited-supplier signal
Made-in-China tags Diamond Member and Audited Supplier status on the listings that anchor the price bands, with Xiamen Keyuan Plastic, Xiamen Bocheng Plastic, Shanghai Qishen Plastic Industry, ANHUI SHENGHANG PLASTIC, Nantong Kt New Materials, Baoding Lida, Yuyao Zetuo Plastic and Dongguan Xin Guang Hong all carrying the audited designation [S1][S4][S5][S6]. Tangyin County Sanyou Engineering Plastic operates a separate B2B storefront on Guidechem, listing lei wang as project manager and the same UHMW-PE plate/roller/pipe product family referenced above [S3]. LNP Engineering Plastics Inc appears as a guidechem storefront carrying intermediates, polypropylene (CAS 9003-07-0), hydrogenated amines (CAS 61788-45-2) and tallow-alkyl amines (CAS 61791-55-7) — chemical-feedstock CAS numbers rather than finished engineering plastic stock [S2].
The audited-supplier filter on Made-in-China is the practical first-pass vetting step; cross-referencing the supplier's ISO 45001:2018, ISO 9001, or industry-specific certification (Shanghai Qishen displays ISO 45001:2018 explicitly) is the second [S4]. The Guidechem storefront format is useful for chemical CAS verification but is not equivalent to a finished-parts procurement channel.
What this pricing does NOT include
The Made-in-China list prices exclude several cost layers a real landed-cost calculation has to carry: ocean freight (current Red Sea / Cape of Good Hope routing adds transit time and insurance surcharges), China export rebate mechanics, US Section 301 tariff exposure (engineering plastics sit on lists that have moved between 7.5% and 25% across 2024–2025 policy rounds), and incoming-inspection rejection cost. The resin tier at US$2.155–2.789/kg in 5,000 kg lots is a factory-gate number, not a delivered-US-warehouse number [S4].
For comparison, the closest analogue categories on the SourceBySpec price-and-cost track — silicon steel and cast iron — move on similar list-vs-landed logic, with grade and form factor as the dominant price levers; engineering plastic follows the same pattern but with additive package (glass-fibre load, flame retardant, lubricant) as the additional lever that metals do not have. Glass-fibre reinforcement as a parallel reference point is captured in the glass-fibre price band coverage, since filled-polymer pricing is set partly by the reinforcement fibre input.
Sourcing checklist for a 2026 engineering plastic RFQ
Three verifiable datapoints to fix on every RFQ before price comparison: (1) base-resin CAS number or grade designation (POM copolymer vs homopolymer is a 15–25% price gap), (2) additive package specified to weight-% (e.g. 30% glass-fibre PA66, 15% PTFE-filled POM, virgin vs reprocessed ratio), and (3) finished form (pellet, plate, rod, tube, machined part) tied to a drawing or tolerance class [S3][S4]. Without those three fixed, a 4× spread on "engineering plastic" is normal rather than anomalous [S1][S4][S6].
Trackable signals for the next 90 days: the May 2026 Made-in-China resin listings (Xiamen Keyuan, Xiamen Bocheng, Shanghai Qishen) as the spot baseline; any change in the US$1,600–2,200/t Baoding Lida heavy-wall tube band as a proxy for extrusion-line demand; and CAS 9003-07-0 (polypropylene) and CAS 61788-45-2 (hydrogenated amines) storefront activity on Guidechem as a feedstock-pulse indicator [S1][S2][S6].