nonweavon at FOM Hochschule für Oekonomie & Management

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Study with flashcards and summaries for the course nonweavon at the FOM Hochschule für Oekonomie & Management

Exemplary flashcards for nonweavon at the FOM Hochschule für Oekonomie & Management on StudySmarter:

Classification of Process by Fibre length

Exemplary flashcards for nonweavon at the FOM Hochschule für Oekonomie & Management on StudySmarter:

Bale Breaker

Exemplary flashcards for nonweavon at the FOM Hochschule für Oekonomie & Management on StudySmarter:

Basic Function of the Blowing Room and the Carding Room

Exemplary flashcards for nonweavon at the FOM Hochschule für Oekonomie & Management on StudySmarter:

Definition of a Nonwoven

Exemplary flashcards for nonweavon at the FOM Hochschule für Oekonomie & Management on StudySmarter:

Properties of STRUTO and ROTIS

Exemplary flashcards for nonweavon at the FOM Hochschule für Oekonomie & Management on StudySmarter:

ROTIS Technology

Exemplary flashcards for nonweavon at the FOM Hochschule für Oekonomie & Management on StudySmarter:

STRUTO Technology

Exemplary flashcards for nonweavon at the FOM Hochschule für Oekonomie & Management on StudySmarter:

Web formation according to STRUTO and ROTIS

Basic Principle

Exemplary flashcards for nonweavon at the FOM Hochschule für Oekonomie & Management on StudySmarter:

Basic principle of Aerodynamic Web forming 2

Exemplary flashcards for nonweavon at the FOM Hochschule für Oekonomie & Management on StudySmarter:

Basic principle of Aerodynamic Web forming 1

Exemplary flashcards for nonweavon at the FOM Hochschule für Oekonomie & Management on StudySmarter:

Carding with rollers made by Spinnbau Bremen

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Working points on a Roller

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Exemplary flashcards for nonweavon at the FOM Hochschule für Oekonomie & Management on StudySmarter:

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Classification of Process by Fibre length

 Short staple fibres from 10 to 60mm length
 long staple fibre from 50 to 130mm length
 long fibre need adaption from the machine
about
 lager opening rollers
 lager distances of spikes
 more space in delivery zones and
material storage units

nonweavon

Bale Breaker

 several bales are positioned in a line
 the bale breaker mills off by passing over all bales
 by putting various lots together you get a more
equalized quality over a long-term production
 speed by passing the bales: 5-15 m/min
 cotton: 20-48 bales used
simultaneously
 man-made fibres: 6-12
bales

nonweavon

Basic Function of the Blowing Room and the Carding Room

 The fibres are delivered packed in bales.
 Within the bale the are not all oriented and the density varies significantly.
 Specially in bales of natural fibres you will find dirt, dust and many rests.
 Natural product do have a great range of their properties: that’s why they need to be mixed
intensively in various steps to get products with a definable range.
 Also man made fibres need mixing
 The fibres need to get metered

nonweavon

Definition of a Nonwoven

is a textile fabric that consist of staple fibers or filaments,the arrengement of the fibers can be orderlerless (isotropic) or aligned (anisotropic).

in the first stage of the manufacture a web is created, this is a flat structure without significant fixing between the fibers

in the second stage the web undergoes a mechanical, thermal or chemical solidification to then become a nonwoven.

Advantages compared to conventional textiles fabrics:

-no yarn spinning is needed

– very high process speed

-finishing may be done in one step

nonweavon

Properties of STRUTO and ROTIS

 ROTIS does not require bonding agent, blending fibres no through-air bonding chamber; very simple process and good controllable 

 STRUTO compared to ROTIS has better compressional resistant and elastic recovery 

 Both have a good thermal insulation which is proportional to the material thickness

nonweavon

ROTIS Technology

 ROTIS technology

  carding and perpendicular layering procedures like STRUTO 

 the perpendicular laid fibre layer is the lead together with on or two reinforcing nets 

 a solidifying mechanical device with a number of upright situated rotating element create yarn like bundles of the fibres at the surface of fibre layer

  this acts as bonding elements and link the layer with the reinforcement net

nonweavon

STRUTO Technology

 STRUTO technology 

 production of carded web of the blend of bas fibres and bonding mono-component or bi-component fibres

  forming a fibre layer using a special lapper producing upright situated folds of carded web on the conveyor belt of the through-air bonding chamber 

 bonding the fibre layer by passing hot air inside binding chamber its solidifying by cooling

nonweavon

Web formation according to STRUTO and ROTIS

Basic Principle

 Aim of the principle 

     produce fabrics for the increasing demand         for filling and thermal insulation material due        to growing price of energy 

      flexible adaption to the required thickness         fibres mostly oriented upright to the                      nonwovens surface 

      up to 50mm thickness of the nonwoven 

 Working principle 

      lengthwise folding the felt after carding              STRUTO technology 

            fixing by melting fibres 

 ROTIS technology 

            fixing by using a net

nonweavon

Basic principle of Aerodynamic Web forming 2

– basically the fibres after the last opening roller get into an airstream 

 the air-fibres mixture is suck to a screen (either a screen drum or a screen belt) 

 when flowing through the deposited fibres the airstream condenses the so formed web 

 various types of process try to reach the ideally randomized fibre orientation. 

 compared to traditionally formed webs the degree of evenness is not reached; the thinner the web the more even is the traditionally formed web

nonweavon

Basic principle of Aerodynamic Web forming 1

 key idea of aerodynamic web forming is to create a web with ideally randomly oriented fibres 

 this structure shall be as even as possible over the whole width of the web with the same density 

 after getting for e. g. water entangled the nonwoven will have a very homogenous structure and tearing forces in all three dimensions (!)

 due to the one-layer structure no danger of web-layer splitting 

 this method is used for thicker webs and need no additional crosslaying. 

 very economic method compared to the needed investment and the low working expenses

nonweavon

Carding with rollers made by Spinnbau Bremen

 Non-woven card with double pick-up for general applications, cross-laid products in the medium to coarse fineness range 

 Standard version with overhead recess

 Supporting group with 2 worker / clearer pairs  Main reel diameter: 1,500 mm 

 5 worker / turner pairs 

 Large double pickup and 2-roller take-off with cleaning roller for parallel pile 

 Fineness: from 1 dtex 

 Stack lengths: 20 – 150 mm 

 Working widths: 1,000 – 3,500 mm 

 Pile speed: up to 120 m / min 

 Fiber type: synthetic and natural fibers

nonweavon

Working points on a Roller

 carding process between main drum and the
worker is determined by the
 speed difference between the two rollers and he
 forces acting on the fibres in the bundle
 in case the carding force is greater than the
friction between the fibre, some of the fibre are
removed from the worker an some remain on
the main drum
 this process needs accurate settings of the
clothing section with respect to each other
 the clearer or stripper removes the fibres from
the worker and feeds them to the main drum
again
 this process repeats several times and results in
a good fibre blending

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