Phenolic molding compound, commonly known as Bakelite powder, is a widely used thermoset composite material for electrical, home appliance, automotive and industrial equipment industries. Depending on molding processes, it is mainly divided into two categories: injection molding grade phenolic molding compound and compression molding grade phenolic molding compound. They differ significantly in formula system, material performance and application scenarios.
Injection Molding Grade Phenolic Molding Compound
Injection molding grade phenolic molding compound is developed specifically for thermoset injection machines. Its formula features high flowability and fast curing characteristics. After heating, the raw material plasticizes uniformly. Pushed by the screw, it can be rapidly injected into the closed mold cavity and fully cures at high temperature inside the mold.
This material supports high automation and short molding cycle for continuous mass production. Excellent flow enables it to fill thin-wall, intricate parts with fine ribs and complex holes. Finished products deliver consistent dimensional performance with minimal flash and less post-processing work.
It is widely used for precision components such as small home appliance parts, electrical switches, connector frames and miniature insulation components. For glass fiber reinforced injection grades, note that screw shearing may break glass fibers to some extent, so the ultimate strength is slightly lower than compression molding material of the same formula.
Compression Molding Grade Phenolic Molding Compound
Compression molding grade phenolic molding compound, also called press molding grade, is the traditional Bakelite powder designed for hydraulic compression molding presses. It adopts a formula with relatively low flowability and dense fillers. During production, a fixed amount of raw material is loaded into the open mold. The mold closes under high temperature and pressure. The material flows under pressure to fill the cavity and cures.
No heavy shearing occurs during molding, so the internal structure stays compact and glass fibers retain their original length to the maximum extent. Therefore, compression molded parts show outstanding mechanical strength, heat resistance and high-voltage insulation performance. Thick and large workpieces are less prone to porosity defects.
It suits high-load components under harsh working conditions, including high-power electrical insulators, heavy-duty industrial brackets, thick heat-resistant parts, automotive friction components and large Bakelite structures. The downside lies in longer production cycle, low automation level and lower single-piece production efficiency compared with injection molding.
About Ningbo Fengju Plastify Co., Ltd.
Founded in 2001 and located in Ninghai, Ningbo, Zhejiang Province, China, Ningbo Fengju Plastify Co., Ltd. is an original manufacturer with independent import and export rights. For more than 20 years, the company focuses on the R&D and production of phenolic, urea-formaldehyde and melamine molding compounds. It operates an independent formula laboratory and complete production lines. Products are sold worldwide including Southeast Asia, the Middle East and other regions. Familiar with overseas export compliance requirements, we can provide full sets of RoHS 10 items, REACH and MSDS documents and support customized modified formulas.
Fengju Plastify mass produces two main product lines: injection molding grade phenolic molding compound and compression molding grade phenolic molding compound. Modifications such as glass fiber reinforcement, flame retardancy, high temperature resistance, low-odor ammonia-free and color matching are available upon request.
For injection molding grade phenolic molding compound, Fengju can adjust formulas with different flow rates and curing speeds to fit various injection machine brands. We stably control shrinkage rate to reduce molding defects including short shot and burning on thin-wall parts, supporting stable bulk supply for mass-produced precision small parts.
For compression molding grade phenolic molding compound, Fengju optimizes the filler system to preserve glass fiber length as much as possible, ensuring high strength, heat resistance and superior insulation performance. Formulas are compatible with all types of hydraulic molding presses, lowering risks of porosity and delamination for thick workpieces and meeting long-term service demands of heavy-load industrial components.
Every batch of products is tested for key indicators including flowability, mechanical strength and insulation performance to strictly control batch-to-batch stability. The technical team has rich on-site molding experience and can provide material samples to assist customers in mold trial and verification. With self-operated export business, multiple trade terms are available for reliable delivery.
Supporting Advantages of Ningbo Fengju Plastify
As a manufacturer mastering formula technology for both injection and compression grade phenolic materials, Fengju Plastify offers more than raw material supply.
Our technical team has years of on-site molding experience and understands pain points of both molding processes. Custom formulas can be developed according to customer’s molding equipment, product drawings, working conditions and export destination requirements:
✔ Customizable grades: glass fiber reinforced, flame retardant, high temperature resistant, low-odor ammonia-free and colored materials
✔ Full EU export compliance: complete RoHS 10, REACH and MSDS reports ready for customs clearance
✔ Free samples and mold trial support. We help verify shrinkage rate and molding parameters in advance to predict defects like cracking, bubbles and short shot and cut customers’ mold trial cost
✔ Self-operated export service with independent customs declaration. Accept FCL and LCL orders with stable lead time
Contact Ningbo Fengju Plastify
Tel: +86 15825568888
Email: jack@fj-pmc.com; vivian@fj-pmc.com
Address: Ninghai County, Ningbo City, Zhejiang Province, China
Business Scope: R&D and manufacturing of phenolic molding compound, urea-formaldehyde molding compound and melamine molding compound. Full range of injection molding grade and compression molding grade phenolic molding compounds available. Custom modified formulas, samples, test certificates and MSDS documents are supplied. Global buyers are welcome for inquiries and business negotiations.
https://www.fj-pmc.com/
宁波丰巨塑化有限公司
