Formosa TAIRIPRO® K4715 PP

Product Overview

• Manufacturer: Taiwan Chemicals & Fibre Corporation (FCFC / Formosa)

• Product Series: TAIRIPRO® Polypropylene Series

• Material Classification: Injection Molding Grade Random Copolymer Polypropylene (Random PP)

• Physical Appearance: Natural translucent pellet resin

TAIRIPRO® K4715 is a medium-high fluidity injection molding grade random copolymer polypropylene grade launched by Formosa (FCFC). It is a flagship injection molding grade within the TAIRIPRO general PP product matrix. Backed by Formosa’s mature polymerization technology, this material offers stable batch performance, good fluidity, excellent optical transparency, and balanced mechanical performance. After molding, the parts exhibit good surface gloss and consistent dimensions, making them suitable for high-speed injection molding and multi-cavity mold production. It is widely used in daily necessities, home appliance accessories, high-transparent packaging containers, and general industrial parts, serving as a cost-effective PP material for general injection molding scenarios.

Technical Data Sheet (TDS)

Physical Properties

Mechanical Properties

Thermal Properties

The technical data sheet (TDS) of Formosa TAIRIPRO® K4715 PP material from Taiwan Chemicals & Fibre Corporation, if there are differences, please refer to the official website of FCFC.

Features & Benefits

• Medium-High Fluidity Processing Performance: With a melt flow rate of up to 18 g/10min (230 °C/2.16 kg), it exhibits excellent melt filling capacity, making it suitable for multi-cavity molds and thin-walled part injection molding. It shortens molding cycles and enhances mass production efficiency.

• Balanced Mechanical Performance and Impact Toughness: Features a tensile yield strength of 30 MPa, an elongation at break greater than 200%, and a flexural modulus of 1,130 MPa. It balances rigidity with good impact toughness to meet the load-bearing requirements of general structural parts.

• Superior Transparency and Surface Gloss: As a random copolymer PP, its crystal size is micro, providing molded parts with better optical transparency and surface gloss than homopolymer PP, enhancing the appearance texture of end products.

• Stable Dimensional Accuracy: Parallel molding shrinkage is stably controlled within the 1.5%–2% range with good batch consistency and minimal dimensional fluctuation, making it suitable for batch injection-molded parts with tolerance requirements.

• General Chemical Resistance: The polypropylene matrix offers good resistance to common weak acids, weak bases, alcohols, and aqueous solutions, accommodating most routine service conditions and general packaging scenarios.

4: Applications

1. Consumer Goods: Transparent/translucent plastic storage boxes, food packaging lids, tableware, daily commodity housings, and high-fidelity bottle caps (thin-walled injection molded parts). Powered by high fluidity, it achieves high-speed mass production with clean and aesthetic product appearances.

2. Home Appliances: Small appliance transparent panels and housings, internal electrical structural parts, fan accessories, and household appliance plastic components. Its balanced rigidity and toughness meet daily appliance usage requirements and are adaptable to multi-cavity mold batch production.

3. Packaging Industry: High-transparent injection molding packaging containers, plastic crisper boxes, and box lid accessories. Good chemical resistance, transparency, and hardness fit the loading and display requirements of general food and daily chemical packaging.

4. General Industrial Accessories: Low-load industrial structural parts, transparent plastic boxes, small gears, bushings, and fixing bases. Suitable for industrial part scenarios requiring strict cost control and mild operating conditions.

5. Toys and Stationery: Transparent/colored plastic toy housings, stationery accessory boxes, and educational plastic parts. Stable molding performance, easy coloring, and high color rendering suit the production of multicolored appearance products.

FAQs

Q1: Is pre-drying required before processing Formosa TAIRIPRO® K4715 PP?

A: Polypropylene has extremely low water absorption and generally requires no pre-drying under sealed storage conditions. If the raw material is unsealed and exposed to high-humidity environments for an extended period, drying at 70–80 °C for 1–2 hours is recommended to prevent surface water marks, silver streaks, and other aesthetic defects.

Q2: What are the main differences between K4715 random copolymer PP, homopolymer PP, and block copolymer PP? How to select?

A: The three differ in molecular chain structure and performance focus:

• K4715 (Random Copolymer PP): Ethylene monomers are randomly inserted into the main chain, offering good optical transparency, high gloss, low heat-sealing temperature, and good toughness. It is particularly suitable for high-transparent daily goods, food packaging boxes, and premium-texture housings;

• Homopolymer PP: Polymerized from a single propylene monomer, featuring higher rigidity, hardness, and heat resistance, but lower transparency and lower-temperature impact toughness;

• Block Impact Copolymer PP: Contains rubber phase blocks, providing the strongest low-temperature impact resistance, though with low transparency (opaque appearance).

• Selection Principle: Choose K4715 when pursuing transparent appearance, surface gloss, and good comprehensive toughness; choose homopolymer PP for ultra-high rigidity and cost-effectiveness; choose block copolymer PP for stringent drop resistance and low-temperature impact requirements.

Q3: What are the flammability rating and environmental compliance status of TAIRIPRO® K4715?

A: The basic flammability rating of this grade is UL 94 HB, which is a slow-burning rating and cannot be used for high-flame-retardant electrical components. The material complies with the EU RoHS environmental directives, and relevant compliance declaration files can be provided to support product export to mainstream markets such as the EU.

Q4: Is K4715 suitable for thin-wall injection molding? What is the recommended processing procedure?

A: K4715 is a medium-high fluidity injection molding grade PP. Its 18 g/10min MFR supports fast mold filling for thin-walled products, complex structures, and multi-cavity molds, making it suitable for high-speed injection mass production. Recommended barrel temperature ranges from 180–220 °C, with a mold temperature of 40–60 °C, which can be fine-tuned based on product wall thickness and structure.