Ordinary hot water bags contain only hot water, and the contents are relatively simple. But cold compress models need to contain a mixture of ice water, and neck support models need to be repeatedly bent to fit the neck - due to different usage scenarios, the production standards also need to change accordingly. Changzhou Yuefeng sets individual production processes for each product type. 

Cold compress product: Low temperature does not become hard or cracked

The cold compress bag is filled with ice water or ice blocks at a temperature of 0-4℃. Ordinary PVC will become hard and brittle when exposed to low temperatures, and will crack even with a slight squeeze. Changzhou Yuefeng Plastic Products Co., Ltd.  has adjusted the low-temperature toughness in the cold compress product formula to ensure that the bag body remains soft at low temperatures and is not prone to cracks. The edge sealing and threaded openings have also undergone low-temperature impact tests, and are not "just talk on paper". 

Cervical Support: Fits snugly, resistant to repeated bending

The cervical hot pack needs to fit the curve of the neck. When used, it is often pressed against the head and repeatedly bent. We optimized the thickness distribution of the middle area of the bag body on the mold to make the force distribution at the bending points more uniform, avoiding single-point fatigue. At the same time, we widened the edge width to enhance the tear resistance. Users feel comfortable when they lean on it, and you don't have to worry about receiving complaints about "it leaks after using twice".

Changzhou Yuefeng Plastic Products Co., Ltd. specializes in the production of hot water bottle, PVC hot water bottle, hand warm hot water bottle, cold water sack, insert hot water bottle，cervical spine hot water bag, plush hot water bottle.