Xuchang Chengrui Insulation Materials Co., Ltd.

How Chengrui PVC Fiberglass Sleeves Transformed a Vietnamese Distributor Supply Chain

Nguyen Van Nam had spent over a decade building Thinh Phat Trading into a trusted name among Hanoi’s industrial manufacturers. Specializing in electrical insulation materials, his company served factories producing everything from motorcycle wiring harnesses to circuit boards for consumer electronics. But by early 2023, Nam found himself battling an unexpected crisis: three long-standing clients abruptly canceled contracts after insulation sleeves failed during routine heat-resistance tests. Local Vietnamese suppliers, once reliable, now delivered brittle products that frayed at 150°C—well below the 200°C threshold his clients required.

The problem ran deeper than quality. Domestic manufacturers, constrained by outdated production methods, couldn’t scale to meet Nam’s growing orders. Price hikes of 20%. in six months—driven by Vietnam’s rising labor costs and material shortages left him juggling angry customers and vanishing profits. Reluctantly, Nam turned to Chinese suppliers, lured by promises of lower pricing. Yet his first partnership ended in disaster: delayed shipments, mislabeled certifications and sleeves that disintegrated faster than his locally sourced alternatives.

Determined to salvage his business, Nam spent nights scouring industry forums for solutions. In March 2023, a comment from a Thai distributor caught his eye: “For harsh environments, Chengrui’s fiberglass sleeves outperform regional brands.” Intrigued, he visited Chengrui’s website and immediately noticed stark differences. Unlike other Chinese vendors, the company published third-party test reports showing compliance with IEC 60684-1 and UL standards. Their technical datasheets specified a heat tolerance of 220°C, a critical upgrade for Vietnam’s automotive clients.

Chengrui’s sales team responded to Nam’s inquiry within 90 minutes, a stark contrast to the 3-day wait he’d endured with previous suppliers. Chengrui provided a transparent cost breakdown: sleeves priced cheaper than his Vietnamese options, with no hidden logistics fees. When samples arrived via express delivery, Nam subjected them to brutal testing, exposing them to Hanoi’s 95%. humidity for 72 hours before heat cycling. The pvc fiberglass sleeves emerged intact with no warping or fiber separation.

Thinh Phat Trading’s first 5,000-meter order with Chengrui marked a turning point. The shipment arrived at Hai Phong Port three days ahead of schedule, accompanied by Vietnamese-language compliance documents, a first in Nam’s import experience. Within weeks, his team restocked shelves for 12 industrial clients, including a Japanese-owned automotive plant that had switched to Korean suppliers six months prior. Feedback was unanimous: Chengrui’s pvc fiberglass sleeves offered superior abrasion resistance in Vietnam’s humid factories.

By Q4 2023, Chengrui accounted for 70%. of Thinh Phat’s electrical insulation material sales. Nam credits this shift to Chengrui’s “partnership mindset”: their engineers adjusted pvc fiberglass sleeve diameters to accommodate Vietnamese machinery specs, while their logistics team negotiated bulk sea freight rates, slashing Nam’s per-unit costs by 9%. Profits rebounded 28%. year-on-year, allowing him to secure contracts with two Cambodian EV battery startups, a market he’d previously considered inaccessible.

At a Ho Chi Minh City trade fair, Nam summarized his experience: “Chengrui didn’t just sell me a product. They helped rebuild my clients’ trust.” For global manufacturers eyeing Southeast Asia’s booming industrial sector, this collaboration proves that Chengrui's support and technical rigor can turn supply chain vulnerabilities into competitive advantages.