中国香港采购需求：小包装零食袋、咖啡茶袋、大包装猫粮、自立袋、高温杀菌袋、真空密封袋

I'm looking for detailed information regarding plastic materials suitable for our upcoming projects. Specifically, I need to understand the types available, their properties, and the manufacturing processes involved. This will help us determine the best fit for our applications. It would be great if you could include information on the various grades and any unique features that might be relevant. Additionally, please share your pricing structure, minimum order quantities, and lead times. We're also interested in any certifications or compliance standards that your materials meet, as sustainability is becoming a key concern for us. If you could provide samples or an option to evaluate materials before finalizing our order, that would be beneficial. Looking forward to your prompt response!