Company Profile

Our History

Before 2018, our company was a small workshop,After 2018, we bought the current factory, which has 3 floors, each floor 800 square meters,One floor blowing film and injection workshop, one floor bag and valve production workshop,Another floor houses offices and warehouses,We now have all 35 employees,We can produce 50,000 mushroom growth bags and 100,000 degassing valves a day. 

Wenzhou Shangjun Plastic products Co., Ltd. is a Manufacturers, specializing in the production of PP Mushroom Grow Bags, PP Mushroom Grow Bags with Injection Port, Gusset Bag,Flat Pouches, Degassing Valve, Sealing Clips, etc. Wenzhou Shangjun Plastic Products Co., Ltd. is a specialized production of plastic products, focusing on mushroom growth bags and Degassing valves are widely used in coffee and animal feed storage bags,we are well-equipped testing facilities and strong technical force.

With a wide range, good quality, reasonable prices and stylish designs, our mushroom grow bags are extensively used in Cultivation of various mushrooms and the degassing valves .Our products are widely recognized and trusted by users and can meet continuously changing economic and social needs.We welcome new and old customers from all walks of life to contact us for future business relationships and mutual success!

Product Application

Polypropylene bags with filters are used for spawn production、mushroom cultivation Grow bag with self-healing injection port make Liquid form spores in syringes easy to inject into bags and prevents contamination、 Degassing valve can discharge the air from the bag while preventing the outside air from entering the bag, effectively preventing air oxidation and dampening of the coffee beans stored in the bag,In addition to doing what the valve do in coffee bags, the Degassing Valve prevents animal feed bags from breaking apart because of the buildup of fermented gas inside the bags

Production Equipment

film blowing machine、heat sealing machine、heat sealing machine、separate machine

Production Market

Europe, North America, South America，About 30-40% of the mushroomgrowbags in the world come from our factories

Our service

Before you buy the bag, we provide you with all the information about our products. Customers who have placed orders can know the production and delivery situation at any time.If there is any quality problem after receiving the product, we promise to reissue or refund the defective product