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Woven Fabric Click rate: Release time:2022-07-25 Information sources:Hangzhou Qiyao New Material Co.,Ltd.

Product raw material particle is different, die gap is also different. It also affects the draft ratio of the product.

The relationship between draft ratio and die clearance can be expressed by the following formula: b= T /BUR×δ, where B is draft ratio, T is die clearance, BUR is blowing ratio, and δ is film thickness.

Die gap selection, LDPE resin choose a narrow die gap, HDPE very thin film should be adopted to widen the die gap. 

Die clearance of commonly used resins is shown in the table.

Film PVC LDPE HDPE  LLDPE PP PA
Die Clearance  mm 0.8-1.2 0.5-1.0 1.2-1.5  1.5-2.5  0.7-1.0  0.5-0.75

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