1. Product R&D

Rooted in over 20 years of deep expertise in the global PVC and rubber industry, WSD Chemical’s in‑house R&D team is dedicated to continuous iteration of PVC formulations and material innovation. Our R&D system is tailored to nearly all mainstream PVC application scenarios, covering UPVC pipes and fittings, PVC profiles, SPC flooring, PVC wire and cable compounds, artificial leather and more. We never stop refining the performance of core product lines including stearates, PVC stabilizers, internal & external lubricants, impact modifiers and processing aids, to align with the evolving technical demands of downstream manufacturers across 30+ countries. Our team also provides fast, custom formula adjustment services to match your unique production requirements, eliminating the extra R&D trial‑and‑error cost for your team, to turn your targeted performance demands into stable, mass‑producible material solutions.

2. Factory Production

WSD Chemical operates a local professional manufacturing base in Shengzhou, Zhejiang, supported by a mature network of long‑term audited top‑tier polymer additive cooperative factories across the region. We strictly implement standardized, full‑process production management for all lines of PVC chemicals, to achieve an industry‑leading delivery efficiency that cuts the average production lead time down to 70% of the general industry level. Leveraging our strategic location near China’s major seaports and large self‑operated port‑side warehouses, we maintain stable stock of most standard products, and can arrange flexible, customized production and shipment schedules that adapt to your actual order needs, tight project deadlines and seasonal market demand fluctuations. Our integrated production system breaks the limitation of single‑supplier capacity constraints, delivering the full‑range one‑stop PVC chemical manufacturing service that saves you from the hassle of coordinating multiple scattered production partners.

3. Quality Inspection & Control

Quality is the core lifeline embedded in every production step at WSD Chemical. We run a rigorous three‑level quality inspection system for all products before they leave the factory: full‑item inspection of all incoming raw materials, real‑time parameter monitoring throughout the whole production process, and third‑party re‑inspection of finished products before delivery. Our dedicated PVC‑focused in‑house lab team conducts complete pre‑shipment performance checks, composition verification and application simulation for every single order. This strict closed‑loop quality control system effectively avoids unexpected material deviations, reduces your production waste, keeps your manufacturing line running stably, and all delivered products can fully meet the strict technical requirements of real‑world PVC industry production. We can also provide complete standard compliance documents, batch certificates of conformity, to eliminate extra customs clearance risks for global buyers.

4. Product Application

WSD Chemical’s full portfolio of PVC additives and PVC chemicals are widely adapted for nearly all common and segmented downstream PVC processing scenarios. Our product lines including stearates, PVC stabilizers, plasticizers, impact modifiers, processing aids, chemical blowing agents, pigments, optical brighteners, antioxidants & UV absorbers perfectly fit the production needs of UPVC pipes & fittings, PVC profiles, wall panels, ceiling sheets, SPC floor, PVC shoe&soles, artificial leather, PVC wire or cable, PVC compound materials and other PVC finished products. Beyond stable raw material supply, our 20+ years on‑call technical support team can provide actionable, scenario‑specific guidance: targeted PVC production formula optimization, raw material selection reference, mixing formula adjustment, on‑site production troubleshooting and overall production process optimization, to help you effectively reduce the total cost across your whole production chain, improve finished product yield, and achieve long‑term win‑win development as your reliable on‑call PVC formulation consultant.

5.Production Capacity & Inventory Commitment (Capacity & Stock)‌



Backed by our in-house manufacturing base in Shengzhou, Zhejiang, combined with a strict long-term audited network of top-tier cooperative polymer additive factories across the region, WSD CHEMICAL operates an integrated, full-process production system that breaks the single-supplier capacity limit and fully supports flexible customized production schedules for all order scales.



‌Annual production capacity‌ covers a complete additive portfolio: lead-based stabilizers at 10,000 tons, calcium-zinc stabilizers at 10,000 tons, various liquid stabilizers at 2,000 tons, chlorinated polyethylene (CPE 135A) at 30,000 tons, and various ACR processing aids at 5,000 tons. On top of this self-owned capacity, our allied cooperative factories contribute substantial additional output, forming a highly resilient combined supply pool that guarantees timely, uninterrupted delivery even under peak seasonal demand or large-volume project orders.



‌On the inventory side‌, we maintain large-scale self-operated warehouses at China's major ports, including Tianjin, Qingdao, Shanghai, Ningbo, Guangzhou, Shenzhen and Guangxi, keeping stable ready stock for nearly all standard product grades, covering the full line of stabilizers, lubricants, impact modifiers, processing aids, stearates, plasticizers and functional additives. Leveraging this dense port-side layout and proximity to key international shipping routes, we can guarantee shipment of regular in-stock products within 3-5 days, while custom-manufactured items can still be produced and delivered within 7-10 days. This standardized production and logistics management enables fast response to urgent project deadlines and seasonal market fluctuations, keeping our overall lead time well below the general industry average.