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A Discussion on the Use of Engineering Plastics as Alternatives to Metals!

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2020-12-04 16:15

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Metals are non-renewable resources, and replacing steel with plastics is a growing trend!

Engineering plastics replacing metals

Among various types of plastics, some are as hard as stone, while others are as tough as steel. Some people also believe that replacing metals with engineering plastics would compromise product quality. However, the reality is that in many applications, substituting metals with engineering plastics actually enhances product quality. Below, we’ll compare engineering plastics with metals to help everyone gain a more accurate and comprehensive understanding of the performance characteristics of engineering plastics.

The main advantages of engineering plastics compared to metals

(1) Lightweight product: The specific gravity of engineering plastics typically ranges from about 0.83 to 2.2—only one-ninth to one-fourth that of steel and roughly half that of aluminum. For example, PP is even lighter than water. Therefore, this property of plastics is particularly significant for mechanical equipment that requires reduced weight.

(2) High strength: For materials of equal volume, the strength of engineering plastics is generally lower than that of metals. However, since engineering plastics are much lighter than metals, when comparing materials of equal weight, some engineering plastics exhibit significantly higher strength than common metals—making them among the strongest structural materials available today. For example, glass-fiber-reinforced epoxy resin has a tensile strength per unit weight that is roughly twice as high as that of ordinary steel.

(3) Good chemical stability: Engineering plastics generally exhibit excellent resistance to corrosion by chemicals such as acids and alkalis, which is a significant advantage. Among them, polytetrafluoroethylene and polyether sulfone possess particularly outstanding corrosion resistance and hold great promise for development in applications such as chemical anti-corrosion equipment.

(4) Excellent electrical performance: Nearly all engineering plastics exhibit superior electrical insulation properties, extremely low dielectric losses, and excellent arc resistance—qualities that rival those of insulating materials such as ceramics and rubber. Consequently, engineering plastics hold tremendous potential for applications in the motor, electrical, and electronics industries.

(5) Excellent friction-reducing and wear-resistant performance: Leveraging this property, engineering plastics can be used to manufacture various self-lubricating bearings, gears, and seals. Engineering plastics also exhibit excellent resistance to the embedding of foreign objects.

(6) Excellent shock absorption and noise reduction performance: Machinery equipped with engineering plastic bearings and gears can reduce vibration, minimize noise, and even achieve near-silence. For example, the original ball joint housings used in automotive tie rod assemblies were made of 45 carbon structural steel, which had a short service life and generated significant noise. After switching to nylon, not only did the service life nearly double, but the noise level was also greatly reduced.

(7) Easy to form and process: Engineering plastic products can be molded in a single step, whereas metal products invariably require several, or even over a dozen, processing steps to complete. This characteristic of engineering plastics is highly beneficial for saving labor time and improving labor productivity.

With Polycarbonate (PC) For example, polycarbonate boasts strength comparable to that of non-ferrous metals while also possessing both ductility and high toughness. It exhibits exceptionally high impact resistance—so robust that it cannot be damaged even when struck with a hammer—and can withstand the explosion of a television screen. Moreover, polycarbonate has outstanding transparency and can be colored in any shade. A specific comparison is as follows:

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Every departure is an opportunity to encounter even more breathtaking scenery; every journey together is a chance to forge deeper, warmer bonds. In 2025, Zhen Shun Plastics’ annual group tour arrived as scheduled. Leaving behind the hustle and bustle of work, we set off toward Changbai Mountain in Northeast China, drawn by our longing for its majestic mountains and rivers. During our four-day trip, we journeyed from the humid warmth of Lingnan to the crisp freshness of northern lands, stepping from the urban clamor into nature’s serene tranquility. Every leg of the journey was filled with surprises, and every moment was worth treasuring. First Stop: Changbai Mountain—Heavenly Lake Bestows Its True Beauty On the day of departure, the sunshine was just right, and our team began our journey to Heavenly Lake. Along the way, we were deeply captivated by the stunning scenery. As the altitude gradually rose, the distant Tian Shan mountain range came into view. The rolling hills, set against the blue sky, looked majestic and awe-inspiring. After much anticipation, we finally arrived at Heavenly Lake. What luck! It was our first time visiting Changbai Mountain, yet we were greeted with the sight of Heavenly Lake itself! The crystal-clear, deep-blue waters instantly amazed everyone present. Exclamations of wonder and cheers echoed through the air. Everyone rushed to get closer to this "peerless beauty," snapping photos to capture this unforgettable moment. The magic and beauty of nature always touch our hearts directly. Photos simply can’t convey the震撼 (shocking) power of the real scene—so it truly is said, “Seeing is believing.” You really have to see these sights with your own eyes. The blue sky, white clouds, mountains, and lakes—this very moment perfectly embodied the idea that “life is an open wilderness.” After admiring Heavenly Lake, we took another off-road vehicle back to the trailhead, then switched to an eco-friendly bus to reach the waterfall attraction. The Changbai Mountain Waterfall was truly spectacular—the water roared fiercely, its sound echoing for miles. It looked like a giant silver ribbon suspended high above the canyon. Whether viewed from afar or up close, the waterfall was breathtaking. Beneath the falls, the immense impact created swirling mist, making the scene absolutely magnificent. The river flowing down the waterfall ebbed and flowed, winding and twisting, stirring our senses. Second Stop: Guangdong Village—Stepping Into a Pastoral Poem of Korean Ethnic Charm As dusk approached, we arrived at a Korean ethnic village. The setting sun was gently coloring the land with a soft glow. Gray tiles and white walls turned orange, and the eaves were edged with gold—a scene straight out of a folk painting. We stepped into a local home, where the hosts warmly welcomed us and shared with us some of their local culinary customs. Third Stop: Tumen Border Crossing—A Glimpse of Two Countries at a Glance Tumen faces Namyang, North Korea, across the river. Though separated by just a single river, it feels like two entirely different worlds. Standing on the banks of the Tumen River and gazing across, we could clearly see the houses and streets of Namyang, North Korea. Scenes of daily life unfolded before our eyes through the binoculars. Listening to our guide share stories about the neighboring country’s customs and traditions, and watching the scenes across the river, we, as Chinese citizens, felt a strong sense of happiness and pride welling up inside us. We became even more grateful for our country’s peace and prosperity. Fourth Stop: Yanji—Folklore Park—Playing Princess of Yanji for a Day “You really must visit Yanji! Take a stroll in the evening breeze of the university town, put on an elegant long dress, and freeze time in the lantern-lit Folklore Park, becoming a princess of Yanji for a day.” Yanji, with its unique ethnic charm and immersive cultural experiences, has become a “fairytale city” in the hearts of countless tourists. From the snowy winter to the lush spring and summer, this place weaves a dreamlike journey through time with traditional costumes, lanterns, and a bowl of ginseng chicken soup. As our four-day trip in Northeast China drew to a close, we found ourselves immersed in the lantern-lit ambiance of Yanji’s Folklore Park. From the breathtaking azure of Heavenly Lake on Changbai Mountain to the misty spray from the waterfall dampening our clothes; from the warm smiles of Korean families in Guangdong Village bathed in the sunset, to the surge of patriotism we felt when gazing across the Tumen River at our neighbor country—each moment was like a sparkling pearl, strung together to form our cherished memories as the Zhen Shun Plastics family. This journey not only allowed us to take a break from the busy pace of work but also deepened our understanding of each other amidst the mountains and culture, strengthening our team spirit even further. Those moments—cheering together by Heavenly Lake, taking photos of each other in the Folklore Park, sharing delicious meals around the table—all will remain the warmest source of strength in our hearts. This wonderful experience wouldn’t have been possible without the company’s thoughtfulness and care. Thank you, Zhen Shun Plastics, for always putting the happiness of every employee first and creating opportunities for us to connect with nature, embrace culture, and strengthen our bonds through our annual group tour. This heartfelt gesture has made us feel the warmth of a big family and filled us with even greater enthusiasm and anticipation for the future. Moving forward, we’ll carry the insights and emotions from this journey with us, approaching our work with renewed vigor and unity, standing side by side with the company as we set off toward new horizons and create an even brighter tomorrow. We’re eagerly awaiting the next exciting chapter of our journey! About Zhen Shun Zhen Shun Plastics has become an authorized Tier-1 distributor for LG Chem, specializing in the sale of LG Chem’s full range of plastic products: (1) Modified engineering plastics, including modified PC, PC/ABS, PP, PBT, PBT/ABS, ABS+GF, PA6/66, light-diffusing PC, PPO, PPS, POM, TPEE, etc., covering various grades and specifications such as flame-retardant, glass-fiber reinforced, long-glass-fiber reinforced, and mineral-filled (TALC); (2) General-purpose plastics, including ABS (flame-retardant, transparent, high-gloss, electroplated, scratch-resistant, heat-resistant, high-impact, high-flow, etc.), PMMA, ASA, SAN, PP, PE, PS; (3) Post-consumer recycled (PCR) environmentally friendly materials, including PCR-ABS, PCR-PC, PCR-PC/ABS, PCR-PP; (4) Modified additives, including impact modifier MBS and toughening agents, etc. Mobile/WeChat: 139 2640 0876. We welcome calls and emails for inquiries and discussions. We are dedicated to tailoring personalized products to meet our customers’ needs and providing comprehensive material solutions.

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