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Dear Valued Customers: Recently, the international situation in the Middle East has experienced some fluctuations. Some customers have expressed concerns that this could affect the supply of raw materials, potentially leading to material shortages or production disruptions. In response, our company attaches great importance to this issue and would like to provide the following clarification: After a comprehensive review, we can confirm that all raw materials used in our production are sourced from suppliers outside the Middle East. Our supply chain is well-established and diversified, with multiple reliable and controllable sources for key raw materials. Currently, our inventory levels are sufficient, and our production operations are running smoothly—neither the Middle East situation nor any other external factors have impacted our supply chain. There is no risk of material shortages or production line shutdowns at this time. Our company remains firmly committed to putting our customers first and continuously optimizing our supply chain management system to ensure a stable supply of products. We will continue to closely monitor developments in the international situation, promptly address any potential risks, and do our utmost to meet our customers’ production needs. Thank you for your long-term trust and support!
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Celebrate the Lantern Festival together.
On the occasion of the Lantern Festival, Dalian Bohai Rubber & Plastic Co., Ltd. extends its heartfelt wishes to our esteemed customers, partners, and all colleagues!
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Natural rubber (NR) is an elastic solid produced by processing a milky sap collected from specific plants. Its main component is polyisoprene, a polymer structure that endows it with unparalleled high elasticity, flexibility, and resistance to fatigue.
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Properties of Natural Rubber and Its Main Production Areas
I. Advantages of Natural Rubber: 1. High Elasticity: It features a high rebound rate, low hysteresis loss, and low heat generation. 2. High Strength: The tensile strength of pure rubber vulcanizates can reach 17–25 MPa; after reinforcement with carbon black, it can increase to 25–35 MPa. It also exhibits excellent fatigue resistance and flexural endurance. 3. Good Processability: After plasticizing, it has high plasticity, making it easy to mix, calender, and extrude. 4. Excellent Adhesion: It bonds easily with other materials.
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Repost: Two-stage (baking) vulcanization of silicone rubber
After a first-stage vulcanization, since the temperature (150℃) is relatively low, some low-molecular-weight substances still remain in the vulcanized rubber, thereby affecting the product’s performance. For example, in silicone rubbers vulcanized with BP or DCBP, the acidic substances—such as benzoic acid—that are generated from the decomposition of the vulcanizing agent remain in the vulcanized rubber after the first-stage vulcanization. When the product is used under high-temperature, sealed conditions above 200℃, these substances cause cracking, leading to a significant drop in hardness and a sharp deterioration in physical and mechanical properties, ultimately rendering the product unusable. To address this issue, a second-stage vulcanization is required to remove various low-molecular-weight substances from the rubber. Moreover, the second-stage vulcanization can also eliminate moisture or crystal water from fillers, thereby preventing hydrolytic aging of silicone rubber products during use or storage.
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A product engineer’s day typically begins with checking emails and reviewing project progress. For product engineers at manufacturing companies that produce automotive parts, consumer electronics, and other products, the top priority is to thoroughly understand the product drawings, data, and technical standards provided by customers.
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Address: No. 39-6-1, No. 2, Gangxing Street, Economic and Technological Development Zone, Dalian City, Liaoning Province
Telephone:0411-88035927
Fax:0411-88035927
Mailbox:liuchunhong@dlbhxs.com
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