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The global trend towards lightweighting continues to advance, with car manufacturers and component suppliers continuously optimizing their material selection standards.

Long glass fiber reinforced polypropylene (LGF-PP) is gradually replacing traditional metal and short fiber plastics with its advantages of low density, high rigidity, low temperature resistance, and excellent molding stability, becoming one of the hottest modified materials in the global automotive industry.

Compared to metals, LGF-PP can reduce weight by 30% -50%; Compared with short glass fiber PP, its impact resistance and creep resistance are usually over 40% higher (according to ISO 179 or ASTM D256 testing standards).

A modified factory with 20 years of experience

As a source factory deeply engaged in the research and production of long glass fiber modified polypropylene (PP) and polyamide 66 (PA66), our company has more than 20 years of experience in formula optimization and batch production process improvement. Multiple grades of LGF-PP10, LGF-PP20, LGF-PP30, LGF-PP40, and LGF-PP50 products are exported in bulk to Europe, Southeast Asia, and the Middle East.

These materials are used for supporting core components such as suspension rod bases, engine decorative covers, car sunroof rails, and door frames.

Selection reference: LGF-PP20-30 is suitable for decorative parts and light load-bearing parts (such as decorative covers), LGF-PP30-40 is suitable for structural parts (such as sunroof rails), and LGF-PP40-50 is used for high rigidity replacement of metal parts (such as rod bases).

The advantages and processing points of continuous long glass fiber technology

Unlike traditional short glass fiber PP, our factory adopts a continuous long glass fiber impregnation and coating process to arrange the glass fibers in a continuous orientation in the matrix. Third party testing shows that under this process, the material’s creep resistance and impact resistance are improved by more than 40% compared to ordinary short glass fiber PP. This product is not easily warped or deformed under high and low temperature cycling conditions, making it very suitable for rigorous testing of passenger and commercial vehicle components.

Actual loading verification: The warpage of large-size components such as sunroof guide rails is reduced by about 30% compared to the short glass fiber solution.

Processing precautions: LGF-PP is sensitive to injection molding processes, and it is recommended to use low-pressure, low-speed, wide gate design to avoid using high compression ratio screws to prevent excessive shear and fracture of glass fibers. Our factory can cooperate with customers to conduct mold flow analysis and provide initial process parameters.

Customized formulas for different overseas climates

We can provide customized special formulas for weather resistance, low VOC, oil resistance, and flame retardancy according to different overseas driving environments. The requirements for LGF-PP vary significantly in different climates, and using universal grades directly can easily lead to on-site failure. We have developed a low-temperature toughened long glass fiber polypropylene (PP) for the high-altitude market in Northern Europe, which will not exhibit brittle cracking at -40 ℃.

This low-temperature grade has undergone a 1000 hour -40 ℃ aging test, with an impact strength retention rate of ≥ 85%.

At the same time, we have optimized the anti hydrolysis formula for the hot and humid climate in Southeast Asia, making it suitable for long-term use of tropical automotive parts.

After aging at 85 ° C/85% RH for 1000 hours, the bending strength retention rate of the anti hydrolysis grade exceeds 80%.

Full process production control and export certification

The factory relies on a large fully automatic extrusion production line to achieve independent control of the entire process from raw material modification, granulation to performance testing.

Each batch of products has a full set of export certifications such as SGS, ROHS, REACH, etc., which comply with the environmental standards of the European Union and North America.

Compared with European and American brands such as SABIC and LyondellBasell, our LGF-PP of the same grade is priced 20% -30% lower per ton, and its key mechanical properties reach 90% -95%. In addition, our delivery cycle is shorter (15-20 days for regular orders) and we provide overseas technical support.

Localization Acceleration: Verification Process for Overseas Customers

With the acceleration of the global trend towards localization of automotive parts, more and more overseas automotive parts processing factories are abandoning expensive European and American raw materials and instead choosing domestically produced long glass fiber polypropylene.

A typical validation cycle: from the first sample delivery to bulk orders, it usually takes about 3 months.

Firstly, provide 500-1000kg samples for customers to conduct mold flow analysis and bench testing. After confirmation, export the entire container.

We suggest that customers synchronously test the batch stability of materials during the verification phase. Our factory can provide mechanical performance reports for three consecutive batches as a reference.

Our company relies on a mature sea land transportation network to continuously provide overseas samples and customized formula services.

We are able to deliver small batches of samples and bulk export products in full containers stably, and with the high cost-effectiveness of modified raw materials, we have opened up channels for Chinese modified plastics to enter the global automotive parts industry chain.

Future direction: New energy vehicle battery bracket and charging pile shell

In the future, the factory will continue to increase investment in the research and development of lightweight new materials, while expanding the application of long glass fiber modified materials in fields such as new energy vehicle battery brackets and charging pile casings.

New energy vehicles have put forward new requirements for materials: flame retardant (UL94 V-0), electrolyte resistance, and long-term heat aging resistance. At present, the focus is on developing halogen-free flame retardant LGF-PP, with the goal of achieving a 1.6mm V-0 flame retardant rating.

We will closely follow the development trend of the global new energy vehicle industry and continue to promote the global process of lightweighting automotive components.