8/19/2019 Stenter Machine

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Mazadul Hasan Shishir , Southeast University

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Stenter Machine

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Prepared By : Mazadul Hasan sheshir ID: 201000040000813 th Batch (session 200 !2013"Depart#ent : $et Processin% &echnolo%y'#ail: #azadulhasan yahoo)co#Blo% : ***) &e+tilela,),lo%spot)co# (-isit"

Southeast UniversityDepartment Of Textile Engineering

I/A !1" ! Te#gaon Dha$a %angla&e sh

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© right

8/19/2019 Stenter Machine

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Main Units

A padder to uniformly wet-out fabricsand apply nishing agents, !eft-straightening devicesand control e"uipment

Mazadul Hasan Shishir , Southeast University

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Uses

#he stenter is a continuous types of machineand can be used before or afterdyeing$printing%

#he stenter frame used for followingprocesses%&% '"ualizing(s)ew and bow control*+% rinted design control

% .abric width setting/% Application of nishing chemicals0% 1rying

*

Mazadul Hasan Shishir , Southeast University

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rocess stages!

Mazadul Hasan Shishir , Southeast University

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Stenter .rame+

Mazadul Hasan Shishir , Southeast University

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Stenter .rame

Mazadul Hasan Shishir , Southeast University

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rocess 1escription

#he selvedges are held by two endless chainstypically /2 to 32 metres in length and the fabricis conveyed through a series of heatedcompartments or bays% Hot air is directed onto thefabric e"ually from above and below% #heselvedges are held either on pins about 0 mm longmounted in base plates or by clips that grip theselvedges between smooth surfaces% 4ubrication

of the chain is important and this ta)es placeautomatically during running% #he lubricant mustbe completely stable during continuous high-temperature operation%

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Mazadul Hasan Shishir , Southeast University

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Some features

Stenter speeds range from only &2 m$min for heavyweightfurnishings up to &22 m$min for lightweight dressgoods%5verfeed is fre"uently necessary to compensate for warp waystretch in previous processing and to minimise shrin)age inwashing and dry-cleaning%

#he speed of the fabric through the stenter is controlled bythe motion of the pin chain, but the fabric entry can bead6usted independently by the entry rollers%

#emperature uniformity over the entire area of fabric isensured

#oo low temperatures do not allow a good setting while toohigh temperatures and too long setting times cause yellowing( A and elastic bres*, sti7 hand (acrylics*, and loss ofelasticity (elastic bres*%

.

Mazadul Hasan Shishir , Southeast University

8/19/2019 Stenter Machine

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#he setting temperature used is

above #g% 8n heat setting, inter-chain bonds, such as hydrogenand dipole bonds, brea)% #hisallows the molecular chains to

move and adopt new, stress-freepositions% 9ew intermolecularbonds then form with the fabric ina rela:ed condition at the settingtemperature% After cooling, thepolymer molecules in the

laments become frozen in place% #he new bonds are stable up tothe heat setting temperature% #he

reorganized internal polymerstructure and the material;s

Heat setting1

Mazadul Hasan Shishir , Southeast University

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#emperature

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'"ualizing (S)ew$ =ow*1

Mazadul Hasan Shishir , Southeast University

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S)ew and =ow1)

Mazadul Hasan Shishir , Southeast University

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1esign 1eviation1*

Mazadul Hasan Shishir , Southeast University

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1!

Mazadul Hasan Shishir , Southeast University

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How to control it>1+

Mazadul Hasan Shishir , Southeast University

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!eft Straightening 1evice1,

Mazadul Hasan Shishir , Southeast University

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Mahlo or =ianco 4ocation

Mazadul Hasan Shishir , Southeast University

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&% Actualweftcon guration +% Actualdistortion (in?*

% 32mintrenddiagrams

(s)ew andbow*

@ontroling Monitor1.

Mazadul Hasan Shishir , Southeast University

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