The leather surface of the brush roll is marked with scratches
There are impurities in the glue or surface treatment agent. They should be thoroughly removed.
The steel strip surface has deep scratches. The steel strip should be replaced.
The leather surface pattern of the brush roll is unclear
The embossing roller is not placed horizontally. It should be adjusted to a horizontal position.
The temperature of the roller surface is uneven, with lower temperature at both ends. An auxiliary heat source should be added at the low temperature area to make the roller surface temperature evenly distributed.
The leather surface of the brush roll has fabric texture after winding and storage
The embossing is not sufficiently cooled after embossing. The cooling process should be strengthened.
The storage environment temperature is too high. The finished product should be stored in a low-temperature environment.
The leather surface of the brush roll has regular defects
There are impurities on the rubber roller of the embossing roller or embossing machine. The impurities on the roller surface should be thoroughly removed.
There are defects on the roller surface. The roller surface should be repaired and the defects should be removed.
The leather surface of the brush roll has large bubbles
The foaming temperature is too high. The foaming temperature in the plasticizing oven should be appropriately reduced.
The moisture content in the glue is too high. The water in the glue should be removed or low-moisture glue should be used instead.
The base fabric is damp. Heat drying process should be carried out.
The leather surface of the brush roll has protruding bubbles
The raw material is damp. Pre-drying process should be carried out.
The content of volatile substances in the formula is too high. The use of volatile additives should be avoided in the foaming formula.
The additives are improperly selected. Quick gel plasticizer and slower curing agent should be used. At the same time, a higher starting temperature should be adopted.
The foaming of the leather surface of the brush roll is uneven
There is too much air in the plasticized solvent. The glue should be deaerated.
The foaming agent is not dispersed well. The foaming agent and plasticizer should be ground together.
The transverse thickness of the leather surface of the brush roll is uneven
The coating thickness is uneven. The roller distance of the coating and scraping machine should be properly adjusted to make the coating thickness uniform.
The temperature in the plasticizing and foaming oven is uneven. The oven temperature should be properly adjusted to make temperature evenly distributed.
The foam layer of the leather surface of the brush roll is not firmly bonded with the base fabric or is peeled off
The gel temperature is too high. The preheating oven temperature should be appropriately reduced.
The brush roll is too far away from the base fabric. The distance between the brush roll surface and the base fabric should be properly adjusted. During operation, the foam layer should not be peeled off from the steel strip. If the temperature of the steel strip is too high, it should be appropriately reduced.
The steel strip of the brush roll is deformed and skewed
The steel strip is locally deformed due to uneven heating. Before starting heating, the steel strip should be rotated and stop after cooling.
The tension roller is not parallel, causing the steel strip to deviate during operation. The tension of the steel strip should be adjusted in time to make it operate in the middle of the tension roller.
The coating film of the brush roll changes color
The curing agent and stabilizer are improperly used. The use of lead-containing curing agent and sulfur-containing tin stabilizer should be avoided. For example, if a lead-containing curing agent is used in the inner layer and a sulfur-containing tin stabilizer is used in the surface layer, the coating film will change color.
The base fabric of the brush roll is oil permeable
The temperature of the preheating oven is too low. The temperature of the preheating oven should be appropriately increased or the small exhaust outlet should be closed.
The viscosity of the glue is too low. It should be appropriately increased.
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