PolyJet-BCF TopAir

HEBERLEIN. POLYJET-BCF TOPAIR.

Features and Benefits.

The PolyJet-BCF TopAir is used for the improved air interlacing of BCF yarns made of polyester, nylon, and polypropylene, which are used in the manufacture of carpets.

Technical data.

Application area

Type	Count in jet [dtex]		Winding speed [m/min]	Yarn tension after the jet [cN/dtex]
HN251A/CO33	PA	500 … 1200	… 4000	0.08 … 0.12
HN251A/CO33	PP	400 … 1000	… 4000	0.08 … 0.12
HN321A/CO41	PA	700 … 2000	… 4000	0.08 … 0.12
HN321A/CO41	PP	600 … 1800	… 4000	0.08 … 0.12
HN403A/CO52	PA	1000 … 3200	… 4000	0.08 … 0.12
HN403A/CO52	PP	800 … 3000	… 4000	0.08 … 0.12
HN453A/CO63	PA	1800 … 4500	… 4000	0.08 … 0.12
HN453A/CO63	PP	2000 … 4200	… 4000	0.08 … 0.12
HN452A/CO62	PA	2400 … 6000	… 4000	0.08 … 0.12
HN452A/CO62	PP	2200 … 5500	… 4000	0.08 … 0.12
HN520A/CO65	PA	4500 … 8000	… 4000	0.08 … 0.12
HN520A/CO65	PP	4000 … 7000	… 4000	0.08 … 0.12

PA = polyamide fibres, PP = polypropylene fibresAll specifications are non-binding reference values.

Air consumption

The air consumption per thread is calculated from the air consumption of the main air and the air consumption of the upper air.

As a guideline, it can be assumed that the upper air overpressure is 1 bar higher than the main air overpressure. The effective values, however, can only be determined through trials.

Calculation formula: q_vn = q_{vn main air} + q_{vn upper air} [m³/h]

Type	Air channel diameter	Formula
Main air (jet plate)
HN251A	2.5 mm	q_vn = 2.905 x (p_e + 1)
HN321A	3.2 mm	q_vn = 4.759 x (p_e + 1)
HN403A	4.0 mm	q_vn = 7.437 x (p_e + 1)
HN453A	4.5 mm	q_vn = 9.412 x (p_e + 1)
HN452A	4.5 mm	q_vn = 9.412 x (p_e + 1)
HN520A	5.2 mm	q_vn = 12.568 x (p_e + 1)
Upper air (cover plate)
CO33	2x 0.85 mm	q_vn = 0.671 x (p_e + 1)
CO41	2x 1.1 mm	q_vn = 1.125 x (p_e + 1)
CO52	2x 1.4 mm	q_vn = 1.822 x (p_e + 1)
CO63	2x 1.6 mm	q_vn = 2,233 x (p_e + 1)
CO62	2x 1.55 mm	q_vn = 2,379 x (p_e + 1)
CO65	2x 1.85 mm	q_vn = 3,147 x (p_e + 1)

p_e= overpressure [bar]q_vn= air consumption per thread [m³/h] (standard conditions according to DIN1343)

Compressed air requirements

Overpressure PolyJet-BCF TopAir

4.0 … 10.0 bar

For the compressed air quality requirements, see Compressed air purity.

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