介绍了原料、配方、工艺、设备等因素对采用化学发泡剂进行PVC 发泡挤出成型的影响，对实际生产有一定的指导意义。
The influence of the materials, recipe, technology and equipments on extrusion of PVC foam by using chemical foamer are introduced. And it is significant for practical production.
根据发泡立体印花浆中发泡剂不同，发泡立体印花可分为物理发泡立体印花和化学发泡立体印花。
Raised foaming printing can be classified as physical foaming printing and chemical one according to the variety of foaming agents used in the printing paste.
化学发泡法制备隔热耐火砖是将发泡剂直接拌入原料中，使其发生化学反应产生气体，在砖内形成小气泡。
Chemical bubbling method is adding bubbling agent into raw material, making the agent reacting with the materials to produce gas and therefore forming small bubble in the brick.
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