CAS 38742-70-0 230-250℃ Thermoexpandable Microspheres are dedicated physical blowing agents optimized for PBT and PET injection molding. Under 230–250 ℃ high-temperature molding conditions, microspheres expand steadily to form fine closed-cell structure inside polymer matrix. They realize lightweight modification and cut raw material costs while maintaining the rigidity, heat resistance and dimensional stability of PBT/PET components. With excellent thermal endurance, strong shear resistance and

Product Detail

CAS 38742-70-0 230-250℃ Thermoexpandable Microspheres PBT PET Injection Molding Blowing Agent

Product Overview

230-250℃ Thermoexpandable Microspheres CAS 38742-70-0 are professional physical blowing agents specially optimized for PBT and PET polyester engineering plastic injection molding. Tailored for the high-temperature processing characteristics of polyester materials, these microspheres feature accurate thermal expansion temperature window and excellent high-temperature stability. They can complete uniform and stable thermal expansion under 230–250℃ molding environment, forming dense, delicate and independent closed-cell structures inside PBT and PET substrates. The product effectively reduces product density and realizes lightweight modification, while perfectly retaining the original high rigidity, heat resistance, wear resistance and excellent dimensional stability of polyester parts. With outstanding high-temperature shear resistance and superior compatibility with PBT/PET resin systems, it solves the foaming difficulty of high-temperature polyester materials and is a high-performance lightweight additive for precision polyester injection products.

Core Features

Precise 230-250℃ High-Temperature Adaptation: Customized expansion temperature range perfectly matches the standard injection molding temperature of PBT and PET. No premature foaming, cell cracking or thermal decomposition during high-temperature processing, ensuring stable and repeatable foaming effect for mass production.

Excellent Shear Resistance & Low Breakage Rate: Reinforced polymer shell structure resists strong shear force during high-speed injection of polyester engineering plastics. Minimal broken particles avoid silver streaks, pits and uneven cells on product surface, meeting high-precision appearance requirements of PBT/PET parts.

Stable Lightweight & Cost Reduction: Uniform closed-cell structure greatly reduces the weight and material consumption of polyester products. It effectively lowers production costs without damaging the mechanical properties, structural rigidity and heat resistance of PBT and PET engineering plastic components.

Superior Compatibility with Polyester Materials: Ultra-fine microsphere powder disperses evenly in PBT and PET melt, with no agglomeration or precipitation. It will not affect material crystallization, surface gloss, printing and bonding performance, ensuring consistent product quality.

Improve Dimensional Stability of Precision Parts: Effectively release internal molding stress of polyester materials, inhibit shrinkage, warpage and deformation of precision injection parts, significantly improving product yield and dimensional accuracy.

Eco-Friendly Physical Foaming Technology: Adopts pure physical thermal expansion principle, no chemical decomposition, low VOC and low odor. Free of harmful residues, it meets environmental and safety standards for automotive electronic parts and industrial engineering plastics.

Product Specifications

Product Name: 230-250℃ Thermoexpandable Microspheres

CAS No: 38742-70-0

Product Type: PBT PET Polyester Foaming Agent, High Temperature Lightweight Blowing Additive

Foaming Temperature Range: 230℃–250℃

Appearance: White Ultra-Fine Powder

Applicable Materials: PBT, PET and modified polyester engineering plastics

Applicable Processes: High-temperature injection molding and extrusion molding of polyester precision parts

Core Function: Polyester plastic foaming, lightweight modification, density reduction, cost saving, appearance optimization

Recommended Dosage: 1.2%–3.8% (Adjust according to lightweight ratio and product precision requirements)

Application Scope

Specially designed for lightweight foaming modification of PBT and PET polyester engineering plastics. Widely used in automotive high-temperature resistant parts, electronic precision components, polyester plastic shells, insulation parts, industrial structural accessories and modified polyester particles. It effectively solves the problems of heavy weight, high material consumption and easy shrinkage of traditional solid polyester products, and is widely applied in automobile manufacturing, electronic industry and industrial plastic processing fields.

Usage Guide

Mix thermoexpandable microspheres with PBT/PET raw materials uniformly via low-speed stirring at room temperature. Avoid high-intensity shear stirring and long-term high-temperature preheating to prevent microsphere rupture and premature foaming. Perform standard high-temperature injection and extrusion production. The microspheres achieve stable expansion and complete closed-cell forming under 230–250℃ processing temperature. Adjust microsphere dosage, molding temperature, injection speed and holding pressure appropriately according to product lightweight standard and surface quality requirements. Keep raw materials sealed and moisture-proof during production and storage.

Packaging & Storage

Packaging: 25kg sealed moisture-proof composite bag with inner PE liner, dust-proof and leak-proof, suitable for industrial bulk supply and long-distance transportation.

Storage: Store in dry, cool and ventilated warehouse, keep tightly sealed at all times. Avoid direct sunlight, high-temperature stacking and humid environment to prevent caking and spontaneous foaming. Standard shelf life is 12 months under proper storage conditions.

Our Advantages

Our 230-250℃ thermoexpandable microspheres are professionally customized for PBT and PET polyester high-temperature molding processes. Featuring accurate temperature matching, strong shear resistance, stable expansion ratio and excellent batch consistency, the product can form uniform and delicate closed-cell structures. It realizes efficient lightweight and cost reduction while maintaining the high rigidity and high precision of polyester engineering plastic parts. We support factory direct supply, stable bulk delivery, free sample testing and professional polyester foaming formula technical guidance to help customers optimize product performance and reduce production costs.

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Jishengya Technology

Shenzhen Jishengya Technology Co., Ltd. is located in Shenzhen, a special economic zone, and is a comprehensive technology enterprise integrating independent R&D, production and sales.