PC bulletproof glass glue, polycarbonate

PC Bulletproof Glass Adhesive, Polycarbonate Polycarbonate (PC) is a high-performance thermoplastic widely used in the production of bulletproof glass due to its exceptional optical clarity and mechanical strength. It offers excellent transparency, comparable to PMMA, with an amorphous structure that provides superior heat resistance. Key Properties: a) High transparency, close to PMMA, with excellent heat resistance. b) Low molding shrinkage rate (0.5-0.7%), ensuring dimensional stability and high precision in molded parts. c) High impact strength at room temperature, low creep, and a balanced combination of rigidity and toughness. d) Poor fatigue resistance, limited wear resistance, and sensitivity to notches, which can lead to stress cracking under certain conditions. Molding Process Considerations: a) PC is highly sensitive to moisture, even in small amounts. The raw material must be thoroughly dried to keep moisture content below 0.02%. Drying conditions: 100–120°C for at least 12 hours. b) PC is temperature-sensitive, and its melt viscosity drops significantly with increasing temperature. Barrel temperature should be set between 250–320°C (not exceeding 350°C). A higher barrel temperature helps improve plasticization. c) Mold temperature should be maintained between 85–120°C. Higher mold temperatures help reduce internal stresses in the final product, although this may increase the risk of sticking and extend the cycle time. d) PC has poor flowability, requiring high injection pressure. However, excessive pressure may cause internal stress, potentially leading to cracks. Injection speed should be adjusted based on wall thickness—medium speed for thick walls, high speed for thin walls. e) If internal stress is a concern, annealing can be performed. Oven temperature: 125–135°C for 2 hours, followed by natural cooling. f) Mold design should prioritize simplicity and short flow paths. Round runners and polished channels help reduce flow resistance. Gates can be of any type, but the gate diameter should not be less than 1.5mm. PC is hard, so the mold cavity and core should be hardened (e.g., via chromium plating) to prevent damage. g) Post-treatment: Use PE material in the machine for better processing. h) The molecular structure of PC resists orientation and crystallization, but it can withstand strong external forces. For more information, visit: [http://news.chinawj.com.cn](http://news.chinawj.com.cn) PC bulletproof glass glue, polycarbonate Submission: PC bulletproof glass glue, polycarbonate This detailed guide is ideal for manufacturers and engineers working with polycarbonate materials in the production of bulletproof glass or other high-strength applications. Understanding the properties and proper molding techniques ensures optimal performance and product quality.

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