Your current location: > ■ Along with the rapid development of the textile industry, especially the chemical fiber sector, the important role of ceramic guides having been more and more recognized by the insiders． Poor quality or improperly-selected guides may cause "snow" , "hairs" ,or even "breakage" etc． problems in the initial stages of textile production process，consequently，poor quality of final products．
■ Different from the ceramics used in other fields, surface roughness of textile ceramics is a decisive factor in users' consideration． The reason is that, the surface roughness defines the friction coefficient while the yarns / threads passing through the guides ( Please refer to the diagram as below ), and as return the amount of heat created due to the friction with the guides．
"Heated"guides may cause slight shape-change of yarns / threads-especially for chemical fibers，and create "sticking effect" on the surface of guides， as result higher friction coefficient．Thus， the a.m. problems occur．
To avoid the problem， DATIAN CERAMICS have developed a variety of ceramic guides with different surface Conditions for customers' selection．
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1．Natural sintered surface：Ra = 0.6-0.8 μm 2．Normal polished surface：Ra ≤ 0.4 μm 3．Fine polished surface：Ra ≤ 0.2 μm 4．Low friction surface：Ra = 0.3-0.4 μm |
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| ■Natural sintered surface | ■Normal polished surface | ■Fine polished surface | ■Low friction surface |
Recommendation：
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Natural surface |
Normal polished surface |
Fine polished surface |
Low friction surface |
| Spinning,weaving， knitting |
Key positions in twisting & spinning． Winding sector of yarn-making & textu rising |
Twisting & heat-setting sectors in texturising |
Sectors between spinneret and winder in yarn-making． Key positions between creel and the top of 1st heater in texturising． |
Attention: The recommendation is only for reference, customers should make more proper & economical decision according to their own production conditions & experience. For instance, guides with normal polished surface may also be used in coarse fiber yarn-making process!
General prompt for oiling nozzle selection:
While choosing the oiling nozzle， the following factors should be considered：
1．Yarn speed：
lf the speed less than 4,000 m/min， normal polished surface can be considered.
If the speed more than 4,500 m/min， low friction surface should be considered.
2．Size of yarn：
For filament more than 1 dpf, no rmal polished surface can be conside red．
For filament less than 1 dpf, low friction surface should be considered．
3．Material：
Nylon & full dull polyester yarns have special requirements on the design and surface conditions of the nozzles．
DA TIAN may provide the service for nozzles selection． While making inquiry，please specify the points as above．