Changchun Plastic Industry Co., Ltd. is an industry leader in the manufacture and sale of high-quality plastic materials. They are known for producing a wide range of plastic products to meet various industrial and commercial needs. Some of their key offerings may include:

1. Plastic Sheets: They may manufacture and supply plastic sheets of various types, such as acrylic sheets, polycarbonate sheets, PVC sheets, and more. These sheets can be used for applications like signage, glazing, and construction.

2. Plastic Rods and Tubes: Changchun Plastic Industry Co., Ltd. may produce plastic rods and tubes made from different materials like HDPE, PVC, or nylon. These can be used in manufacturing processes, construction, and various industrial applications.

3. Plastic Packaging: They may offer plastic packaging solutions, including plastic bags, containers, and packaging materials suitable for different industries like food, pharmaceuticals, and retail.

4. Custom Plastic Products: The company may specialize in creating custom plastic components and products according to client specifications. This could include items like injection-molded parts, extruded profiles, and more.

5. High-performance Plastics: Changchun Plastic Industry Co., Ltd. may provide high-performance plastics like PTFE (Teflon), UHMWPE, and other engineered plastics for applications that require exceptional durability, chemical resistance, or low friction properties.

6. Quality Assurance: As an industry leader, the company likely places a strong emphasis on quality control and assurance to ensure their plastic materials meet industry standards and customer requirements.