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Introduction

In the high-performance color-matching system of glass fiber reinforced plastics, the choice of materials significantly impacts the mechanical properties, processing efficiency, and cost control of the final products. This article conducts a comparative analysis of mechanical performance data, glass fiber (GF) cutting data, and Lab values from different formulations, and explores the cost-effectiveness advantages of Engineering Plastic Zinc Sulfide S-10 from Yunfu Hongzhi New Materials Co., Ltd.(Ambition?).

Zinc sulfide, as a white multifunctional pigment, imparts unique characteristics and advantages to products that other white pigments, such as titanium dioxide (TiO?), cannot provide. Yunfu Hongzhi New Materials Co., Ltd.(Ambition?) Engineering Plastic Zinc Sulfide S-10 is organically modified and presents a blue-phase white pigment. It has a refractive index of 2.37, a Mohs hardness of 3.0 (relatively low hardness), and a high thermal conductivity.

I. Comparative Analysis of Mechanical Properties Between Engineering Plastic Zinc Sulfide S-10 and Titanium Dioxide Formulations

1. Tensile Properties

① Yield Tensile Strength: In the high-performance color-matching system of glass fiber reinforced plastics, Formulation 3 (Engineering Plastic Zinc Sulfide S-10) achieves 197.1 MPa, significantly higher than Formulation 1 (Titanium Dioxide) at 161 MPa, and close to the standard formulation's 203.5 MPa. This indicates that S-10 performs better in enhancing material rigidity, effectively reducing strength loss caused by material additives.

② Yield Elongation and Break Elongation: Formulation 3 (S-10) has a yield elongation and break elongation of 2.3%, outperforming Formulation 1 (Titanium Dioxide) at 1.6%. This demonstrates that S-10 has an advantage in maintaining material ductility, reducing the risk of product brittleness.

2. Flexural Properties

① Flexural Strength: Formulation 3 (Engineering Plastic Zinc Sulfide S-10) reaches 282.3 MPa, not only far exceeding Formulation 1 (Titanium Dioxide) at 240.1 MPa but also slightly higher than the standard formulation's 280.5 MPa. The addition of S-10 significantly enhances the material's flexural performance, meeting the demands of high-load scenarios.

3. Impact Strength

Formulation 3 (S-10) has a notched impact strength of 133.1 J/m, a 55% increase compared to Formulation 1 (Titanium Dioxide) at 86.1 J/m. This indicates that S-10 effectively enhances the material's impact toughness, reducing the risk of fracture under dynamic loads.

II. Comparative Analysis of Mechanical Properties Between S-10 and Imported Zinc Sulfide Formulations

1. Tensile Strength at Break: Formulation 3 (Engineering Plastic Zinc Sulfide S-10) achieves 197 MPa, outperforming Formulation 2 (Imported Zinc Sulfide) at 187.9 MPa, showcasing the technical competitiveness of zinc sulfide S-10 in domestic substitution.

2. Flexural Strength: Formulation 3 (Engineering Plastic Zinc Sulfide S-10) reaches 282.3 MPa, significantly higher than Formulation 2 (Imported Zinc Sulfide) at 250.1 MPa, further validating its superior flexural performance.

3. Cost-Effectiveness: Imported zinc sulfide is typically more expensive, while Engineering Plastic Zinc Sulfide S-10, while ensuring equal or better performance, significantly reduces raw material costs, achieving cost efficiency.

III. Comparative Analysis of GF Cutting Performance

In the production of glass fiber reinforced plastics, the cutting performance of glass fibers significantly impacts the final product's mechanical properties. The data shows that in formulations with titanium dioxide, the average fiber length is significantly reduced to 196 μm, likely due to the hardness and particle characteristics of titanium dioxide causing more fiber cutting during processing. In contrast, formulations with Imported Zinc Sulfide and Engineering Plastic Zinc Sulfide S-10 have average fiber lengths of 252 μm and 258 μm, respectively, significantly higher than the Titanium Dioxide formulation and close to the 272 μm of PBT glass fiber reinforced materials without pigments.

1. Advantages of Engineering Plastic Zinc Sulfide S-10

S-10 excels in maintaining longer fiber lengths, with an average fiber length of 258 μm, close to Imported Zinc Sulfide (252 μm) and significantly higher than the Titanium Dioxide formulation. This indicates that S-10 causes less fiber cutting during processing, helping to preserve the reinforcing effect of the fibers.

2. Impact on Mechanical Properties

Longer fiber lengths typically provide better tensile and impact performance, as long fibers can more effectively transfer stress. Therefore, the advantage of Engineering Plastic Zinc Sulfide S-10 in maintaining fiber length further supports its superior mechanical performance.

IV. Comparative Analysis of Lab Values

Based on the Lab values and performance comparison data of glass fiber reinforced plastic formulations, the effects of each formulation can be summarized as follows:

1. Color Performance

Formulation 2 (Imported Zinc Sulfide): Highest L value (94.42), best brightness; lowest b value (3.322), weakest yellow tendency, and overall best color performance.

Formulation 3 (Engineering Plastic Zinc Sulfide S-10): Lowest a value (-1.689), strongest green tendency, but L value (94.35) is close to Formulation 2, with secondary color performance.

Formulation 1 (Titanium Dioxide): All color parameters are inferior to the other formulations (L=94.29, a=-0.869, b=4.541).

V. Summary of Comprehensive Advantages

1. Mechanical Properties

Formulation 3 (Engineering Plastic Zinc Sulfide S-10): Best overall mechanical properties, including the highest tensile strength (197.1 MPa), elongation (2.3%), and flexural strength (282.3 MPa).

Formulation 2 (Imported Zinc Sulfide): Highest impact strength (134.2 J/m), with slightly inferior tensile and flexural performance compared to Formulation 3.

Formulation 1 (Titanium Dioxide): Highest flexural modulus (12384 MPa), but other mechanical properties (tensile, flexural, impact) are weaker than Formulations 2 and 3.

2. Improvement in Mechanical Properties: Engineering Plastic Zinc Sulfide S-10 outperforms titanium dioxide formulations in tensile, flexural, and impact properties, particularly excelling in high-strength and high-toughness scenarios.

3. Feasibility of Domestic Substitution: Compared to Imported Zinc Sulfide products, Engineering Plastic Zinc Sulfide S-10 offers comparable or even superior performance, providing a reliable option for domestic material substitution.

4. Cost Optimization Potential: While meeting high-performance requirements, Engineering Plastic Zinc Sulfide S-10 reduces reliance on imported raw materials, lowering overall production costs.

VI. Application Recommendations

1. High-Demand Products: It is recommended to prioritize the use of Engineering Plastic Zinc Sulfide S-10 formulations in fields with stringent mechanical performance requirements, such as automotive components and electronic device housings.

2. Process Adaptation: The proportion of masterbatch addition should be optimized based on specific processing conditions (e.g., injection molding temperature and pressure) to balance performance and processing efficiency.

VII. Conclusion

Yunfu Hongzhi New Materials Co., Ltd.(Ambition?)'s Engineering Plastic Zinc Sulfide S-10 demonstrates significant comprehensive advantages in the high-performance color-matching system of glass fiber reinforced plastics. Its mechanical properties not only surpass those of Titanium Dioxide formulations but also compete with imported counterparts, ensuring high performance while achieving cost efficiency. In the future, Engineering Plastic Zinc Sulfide S-10 is expected to see widespread application in high-value-added engineering plastics, driving the industry toward greater efficiency, cost-effectiveness, and high performance.