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A Adhesive Composition For Flocking The Fiber Onto The Clearer Roller

Abstract: A flocking adhesive composition of the present invention is useful in the textile industry The flocking adhesive is applied on the outer surface of the hollow base body of the clearer roller to flock fibre materials so as to make a flocked clearer roller.

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Notices, Deadlines & Correspondence

Patent Information

Application #
Filing Date
20 May 2009
Publication Number
10/2014
Publication Type
INA
Invention Field
TEXTILE
Status
Email
Parent Application

Applicants

SIMTA CLEAR COATS PVT LTD
3/1-C, NEAR RVS HOSTEL, SULUR, COIMBATORE -641 402.

Inventors

1. C.P.GANESH
3/1-C, NEAR RVS HOSTEL, SULUR, COIMBATORE -641 402.

Specification

TITLE: A ADHESIVE COMPOSITION FOR FLOCKING THE FIBER ONTO THE CLEARER ROLLER Field of invention The invention relates to adhesive compositions and, more specifically, the composition especially suited as an adhesive for flocking the fiber onto the clearer roller. Background information: Flocking is a process which involves embedding of a short length of filament fiber in an adhesive layer covering a fabric substrate. There is wide variety of natural and synthetic fibers are used as flocks including rayon, cotton, nylon, and polyester. Four main methods are available to apply the flock onto glass, metal, plastic, paper or textile by mechanical flocking, direct current electrostatic flocking and alternating current electrostatic flocking. In mechanical flocking, the flock fibers sift down onto a coated substrate that is simultaneously subject to a vigorous beating on its underside. The beating causes the substrate to vibrate which in turn causes the flock fibers to orient vertically and embed in the adhesive, in electrostatic flocking high voltages are used in the range of 30,000 volts to 120,000 volts. In both AC and DC electrostatic methods, flock fibers are delivered from a hopper into the electrostatic field. The flock fibers . receive a positive charge from the electrostatic field (alternating with a negative charge in AC electrostatic flocking) and are driven into the neutrally or ground potential charged adhesive coating. It is known in the art that the preparation of flocked articles, wherein flocks are affixed to the surface of a thermoplastic or elastomeric material through an adhesive layer such as a polyurelhane. In the method, the elastomeric surface is coated with a layer of the adhesive and short staple fibers are applied perpendicularly thereto, often utilizing an electrical field. The resulting electrostatically flocked articles are characterized by a fabric like surface of relatively low friction. The adhesive used to bond the flock to the thermoplastic or elastomeric material contain components which not only bond to the flock, but also bond to the thermoplastic or elastomeric substrate. US patent 4892756 discloses a flock adhesive composition in the preparation of flocked rubber articles wherein flocks of staple fibers are fixed to the surface of a rubber substrate through an adhesive layer, the improvement comprising employing as the adhesive layer wherein the adhesive composition comprising A. about 1 to 20% by weight of an aromatic nitroso compound; B. about 1 to 20% by weight of an epoxy resin having an epoxy equivalent of at least one; and C. about 60 to 98% by weight of a blocked isocyanate-functional urethane prepolymer, the isocyanate group or groups of said prepolymer being blocked with a blocking agent comprising a substituted or unsubstituted phenol. US Patent 4,835, 226 discloses a flock adhesive composition comprising 1 to 20% by weight of an aromatic nitroso compound; about 1 to 20% by weight of an epoxy resin having an epoxy equivalent of at least one; and 60 to 98% by weight of a blocked isocyanale-functional urethane prepolymer. The isocyanate groups of the prepolymer arc blocked with a substituted or unsubstituted phenol. The urethane prepolymer has a molecular weight of at least 500, particularly in the range of 1,000 to 10,000, being preferred. In such flock adhesives the residual monomeric isocyanate present will also be converted to the blocked form. Conventional isocyanate prepolymers contain residual monomer-typicalty in excess of 0.5 wt. % and up to several percent. US Patent 4,918, 119 discloses a moisture-hardening flocking adhesive for elastomer flocking containing a C8-Cle substituted diluent which is not a volatile organic component and is not driven off prior to electrostatic application of flock fibers. The adhesive contains an isocyanate terminated polyurethane prepolymer, an aromatic dinitroso compound and an essentially hydroxyl-free epoxy resin having an epoxide value of from about 0.45 to about 0.75. The composition is essentially free of highly volatile organic solvents. The composition is characterized as having improved storage stability and provides excellent adhesion between elastomeric substrates and flocking fibers, even after exposure to water. The essential adhesive component as claimed by' 119 comprises: (a) an isocyanate terminated polyurethane prepolymer based upon a mixture of difunctional polyols, one having a number average molecular weight of from about 400 up to J 000, and another having a number average molecular weight of from more than 1000 up to about 4000; (b) aromatic dinitroso compound; (c) epoxy resin having an epoxide value of from about 0.45 to about 0.75 and a hydroxide value of less than about 0.01 : and (d) at least one C8-C16-alkyl substituted benzene. US Patent 5,185, 402 discloses a flock adhesive based on a combination of two distinct polyurethane prepolymers and a film-forming component. A first polyurethane prepolymer is derived from poly (alkylen oxide) polyols and a second polyurethane prepolymer derived from poly (alkylen oxide) polyols and at least one dimer acid polyol. The preferred polyols suggested for preparation of the prepolymer are a combination of polyols which differ in molecular weight. Specifically, the'402 patent teaches a preferred combination of a poly (alkylen oxide) polyol having a molecular weight in the range of from about 600 to 1,400, preferably about 800 to 1,200, with a second poly (alkylen oxide) polyol having a molecular weight in the range of from about 1,600 to 2,400, preferably about 1,800 to 2,200. WO/2003/076545 discloses an environmentally preferred flock adhesive composition containing low molecular weight prepolymers of isocyanate terminated polyether and/or polyalkadiene polyols is disclosed. The prepolymers are free of residual volatile isocyanate (

Documents

Application Documents

# Name Date
1 1155-che-2009 correspondence others 24-03-2011.pdf 2011-03-24
1 1155-CHE-2009-AbandonedLetter.pdf 2017-07-19
2 1155-CHE-2009-FER.pdf 2016-11-22
2 1155-che-2009 power of attorney 24-03-2011.pdf 2011-03-24
3 1155-che-2009 form-18 24-03-2011.pdf 2011-03-24
3 1155-CHE-2009 CORRESPONDENCE OTHERS 26-02-2014.pdf 2014-02-26
4 1155-che-2009 form-1.pdf 2011-09-03
4 1155-CHE-2009 FORM-13 26-02-2014.pdf 2014-02-26
5 1155-CHE-2009 FORM-13 17-07-2012.pdf 2012-07-17
5 1155-che-2009 description(complete).pdf 2011-09-03
6 1155-che-2009 abstract.pdf 2011-09-03
6 1155-che-2009 claims.pdf 2011-09-03
7 1155-che-2009 abstract.pdf 2011-09-03
7 1155-che-2009 claims.pdf 2011-09-03
8 1155-CHE-2009 FORM-13 17-07-2012.pdf 2012-07-17
8 1155-che-2009 description(complete).pdf 2011-09-03
9 1155-CHE-2009 FORM-13 26-02-2014.pdf 2014-02-26
9 1155-che-2009 form-1.pdf 2011-09-03
10 1155-che-2009 form-18 24-03-2011.pdf 2011-03-24
10 1155-CHE-2009 CORRESPONDENCE OTHERS 26-02-2014.pdf 2014-02-26
11 1155-CHE-2009-FER.pdf 2016-11-22
11 1155-che-2009 power of attorney 24-03-2011.pdf 2011-03-24
12 1155-CHE-2009-AbandonedLetter.pdf 2017-07-19
12 1155-che-2009 correspondence others 24-03-2011.pdf 2011-03-24

Search Strategy

1 searchstrategy_03-11-2016.pdf