Title of Invention	A PROCESS FOR PREPARING FRICTION TAPE
Abstract	This invention relates to a process for the preparation of friction tapes comprising applying a layer of polymer resins on one surface of a woven polyester fabric followed by spraying of emerysent thereon, leveling the layer of emerysent and pressing the same with the help of rollers, subjecting said pressed layer to the step of heat treatment for curing purposes, providing a sticking layer on the other surface of said woven fabric and then providing a protective layer on said sticking layer in order to prepare said friction tapes.

Title of Invention

A PROCESS FOR PREPARING FRICTION TAPE

Abstract

This invention relates to a process for the preparation of friction tapes comprising applying a layer of polymer resins on one surface of a woven polyester fabric followed by spraying of emerysent thereon, leveling the layer of emerysent and pressing the same with the help of rollers, subjecting said pressed layer to the step of heat treatment for curing purposes, providing a sticking layer on the other surface of said woven fabric and then providing a protective layer on said sticking layer in order to prepare said friction tapes.

Full Text	This invention relates to a friction tape and a process for the preparation thereof. The friction tapes are for use on the runways, highways, road crossings, flyovers and bridges for developing friction thereon. The upper surfaces of runways, highways, road crossings, flyovers and bridges usually loose friction property due to the wear of texture made of mortar or the like material, and thus causes slipping of tyres during the running of the vehicles on such surfaces. Therefore, the drivers loose control during the driving of the vehicle and also skidding takes place particularly during wet weather and rainy seasons and this causes collision of vehicles with one another. Therefore, it is needed to restore the friction property on the upper surface of the above mentioned roads and ways. In the prior art, the friction property on the surfaces of the roads and ways are developed by cutting the grooves on the surface of the road and ways with the help of the machines. Friction on the surface is also developed in the prior art by applying bituminous slurry, epoxy sand monitor and by applying chemical on the surface. However, there are certain disadvantages associated with the prior art methods. One of the main disadvantage is that the bituminous slurry wears of very fast leaving the surface friction free. Another disadvantage is that the use of epoxy sand monitor is very costly and is not desirable due to the highest economic loss. Yet another disadvantage is that the chemicals used for developing friction washed of and which distroys vegetation and fertility in the nearby fields. Still another disadvantage is that for developing the grooves very costly machines are required and also the tyres of the vehicles are damaged rapidly. Therefore, the main object of this invention is to provide a friction tape for use on the surfaces of roads and ways, which obviate the disadvantage associated with the prior art. Another object of this invention is to provide a friction tape easily fixable on the surface of the roads and ways so as to develop the friction. Yet another object of this invention is to provide the friction tapes, which develop the required friction on the surface of the road and does not pollute the nearby fields. Still another object of this invention is to propose a process for preparation of a friction tape for use on surfaces of the road and similar other ways. STATEMENT OF INVENTION According to this invention there is provided a process for the preparation of friction tapes comprising applying a layer of polymer resins on one surface of a woven polyester fabric followed by spraying of emerysent thereon, leveling the layer of emerysent and pressing the same with the help of rollers, subjecting said pressed layer to the step of heat treatment for curing purpose, providing a sticking layer on the other surface of said woven fabric and then providing a protective layer on said sticking layer in order to prepare said friction tapes. According to this invention there is provided a friction tape comprising a woven polyester fabric having a friction layer provided on one surface thereon, a sticking/adhesive layer being provided on the other side of said woven fabric having a protective layer provided thereon to protect said layer before the use of the fabric. A friction tape and the process for the preparation thereof according to a preferred embodiment is described herein described and illustrated in the accompanying drawings wherein:- Fig.l shows the sectional view of the tape. Referring to the drawings the friction tape has a friction layer 1 provided on one surface of a woven polyester fabric 2. A sticking/adhesive layer 3 is provided on the other side/surface of the woven polyester fabric 2. A protective layer 4 is provided on the sticking layer for the protection thereof before the use of the friction tape on the surfaces wherein the friction is required to be developed. The friction layer comprises a layer of polymer resin having emerysent of 0.8 to 1.5 mm size sprayed thereon. The emerysent is leveled subsequently and pressed with the help of roller-press. This layer is heated at low temperature between 60 to 80°C for a period of 30 minutes to 60 minutes and is grounded. The sticking/adhesive layer has polymer resin and bitumen mixed with each other In the ratio of 35-65:65-35 respectively. The thickness of the sticking/adhesive layer is between 400 to 600 micron. The polyester fabric is woven polyester fabric of the thickness of 600 to 800 micron and having the tearing strength of 14 kilogram and above per centimeter width. The protective layer is of ordinary polythene. During the use of the friction tape, the protective layer is removed and the surface of the sticking/adhesive layer is passed over a heated roller and the tap is then stretched on the surface of the road/ways. WE CLAIM; 1. A process for the preparation of friction tapes comprising applying a layer of polymer resins on one surface of a woven polyester fabric followed by spraying of emery sent thereon, leveling the layer of emerysent and pressing the same with the help of rollers, subjecting said pressed layer to the step of heat treatment for curing purpose, providing a sticking layer on the other surface of said woven fabric and then providing a protective layer on said sticking layer in order to prepare said friction tapes. 2. The process as claimed in claim 1 wherein said woven polyester fabric used is of a thickness of 600 to 800 micron and having tearing strength of 14 kilogram and above per centimeter width. 3. The process as claimed in claim 1 wherein said friction layer comprises a layer of polymer resin having emerysent of the size of 0.8 to 1.5 mm sprayed thereon. 4. The process as claimed in claim 1 wherein said sticking/adhesive layer is of a thickness of 400 to 600 micron. 5. The process as claimed in claim 1 wherein said protective layer used is of ordinary polythene. 6. A process as claimed in claim 1 wherein said step of heat treatment is carried on at a temperature of 60-80°C for a period of 30 to 60 minutes. 7. A process as claimed in claim 1 wherein said sticking layer comprises a layer of a mixture of bitumen and polymer resin mixed with each other in the ratio of 35:65 or 65:35 respectively. 8. A process for the preparation of friction tapes substantially as herein described.

Full Text

This invention relates to a friction tape and a process for the preparation thereof. The friction tapes are for use on the runways, highways, road crossings, flyovers and bridges for developing friction thereon.
The upper surfaces of runways, highways, road crossings, flyovers and bridges usually loose friction property due to the wear of texture made of mortar or the like material, and thus causes slipping of tyres during the running of the vehicles on such surfaces. Therefore, the drivers loose control during the driving of the vehicle and also skidding takes place particularly during wet weather and rainy seasons and this causes collision of vehicles with one another. Therefore, it is needed to restore the friction property on the upper surface of the above mentioned roads and ways.
In the prior art, the friction property on the surfaces of the roads and ways are developed by cutting the grooves on the surface of the road and ways with the help of the machines. Friction on the surface is also developed in the prior art by applying bituminous slurry, epoxy sand monitor and by applying chemical on the surface. However, there are certain disadvantages associated with the prior art methods. One of the main disadvantage is that the bituminous slurry wears of very fast leaving the surface friction free.
Another disadvantage is that the use of epoxy sand monitor is very costly and is not desirable due to the highest economic loss.
Yet another disadvantage is that the chemicals used for developing friction washed of and which distroys vegetation and fertility in the nearby fields.
Still another disadvantage is that for developing the grooves very costly machines are required and also the tyres of the vehicles are damaged rapidly.
Therefore, the main object of this invention is to provide a friction tape for use on the surfaces of roads and ways, which obviate the disadvantage associated with the prior art.
Another object of this invention is to provide a friction tape easily fixable on the surface of the roads and ways so as to develop the friction.
Yet another object of this invention is to provide the friction tapes, which develop the required friction on the surface of the road and does not pollute the nearby fields.
Still another object of this invention is to propose a process for preparation of a friction tape for use on surfaces of the road and similar other ways.
STATEMENT OF INVENTION
According to this invention there is provided a process for the preparation of friction tapes comprising applying a layer of polymer resins on one surface of a woven polyester fabric followed by spraying of emerysent thereon, leveling the layer of emerysent and pressing the same with the help of rollers, subjecting said pressed layer to the step of heat treatment for curing purpose, providing a sticking layer on the other surface of said woven fabric and then providing a protective layer on said sticking layer in order to prepare said friction tapes.
According to this invention there is provided a friction tape comprising a woven polyester fabric having a friction layer provided on one surface thereon, a sticking/adhesive layer being provided on the other side of said woven fabric having a protective layer provided thereon to protect said layer before the use of the fabric.
A friction tape and the process for the preparation thereof according to a preferred embodiment is described herein described and illustrated in the accompanying drawings wherein:-
Fig.l shows the sectional view of the tape.
Referring to the drawings the friction tape has a friction layer 1 provided on one surface of a woven polyester fabric 2. A sticking/adhesive layer 3 is provided on the other side/surface of the woven polyester fabric 2. A protective layer 4 is provided on the sticking layer for the protection thereof before the use of the friction tape on the surfaces wherein the friction is required to be developed. The friction layer comprises a layer of polymer resin having emerysent of 0.8 to 1.5 mm size sprayed thereon. The
emerysent is leveled subsequently and pressed with the help of roller-press. This layer is heated at low temperature between 60 to 80°C for a period of 30 minutes to 60 minutes and is grounded. The sticking/adhesive layer has polymer resin and bitumen mixed with each other In the ratio of 35-65:65-35 respectively. The thickness of the sticking/adhesive layer is between 400 to 600 micron. The polyester fabric is woven polyester fabric of the thickness of 600 to 800 micron and having the tearing strength of 14 kilogram and above per centimeter width. The protective layer is of ordinary polythene.
During the use of the friction tape, the protective layer is removed and the surface of the sticking/adhesive layer is passed over a heated roller and the tap is then stretched on the surface of the road/ways.

WE CLAIM;
1. A process for the preparation of friction tapes comprising applying
a layer of polymer resins on one surface of a woven polyester fabric
followed by spraying of emery sent thereon, leveling the layer of
emerysent and pressing the same with the help of rollers,
subjecting said pressed layer to the step of heat treatment for
curing purpose, providing a sticking layer on the other surface of
said woven fabric and then providing a protective layer on said
sticking layer in order to prepare said friction tapes.
2. The process as claimed in claim 1 wherein said woven polyester
fabric used is of a thickness of 600 to 800 micron and having
tearing strength of 14 kilogram and above per centimeter width.
3. The process as claimed in claim 1 wherein said friction layer
comprises a layer of polymer resin having emerysent of the size of
0.8 to 1.5 mm sprayed thereon.
4. The process as claimed in claim 1 wherein said sticking/adhesive
layer is of a thickness of 400 to 600 micron.
5. The process as claimed in claim 1 wherein said protective layer
used is of ordinary polythene.
6. A process as claimed in claim 1 wherein said step of heat treatment
is carried on at a temperature of 60-80°C for a period of 30 to 60 minutes.
7. A process as claimed in claim 1 wherein said sticking layer
comprises a layer of a mixture of bitumen and polymer resin mixed
with each other in the ratio of 35:65 or 65:35 respectively.
8. A process for the preparation of friction tapes substantially as
herein described.

Documents:

497-del-2001-abstract.pdf

497-del-2001-claims.pdf

497-DEL-2001-Correspondence-Others-(10-01-2011).pdf

497-del-2001-correspondence-others.pdf

497-del-2001-correspondence-po.pdf

497-del-2001-description (complete).pdf

497-del-2001-form-1.pdf

497-DEL-2001-Form-15-(10-01-2011).pdf

497-del-2001-form-18.pdf

497-del-2001-form-2.pdf

497-del-2001-form-3.pdf

497-del-2001-form-4.pdf

497-del-2001-form-5.pdf

497-DEL-2001-GPA-(10-01-2011).pdf

497-del-2001-gpa.pdf

« Previous Patent

Next Patent »

Patent Number

231551

Indian Patent Application Number

497/DEL/2001

PG Journal Number

13/2009

Publication Date

27-Mar-2009

Grant Date

06-Mar-2009

Date of Filing

17-Apr-2001

Name of Patentee

TECHNOCRATS PVT. LTD

Applicant Address

A-11, GREEN PARK, NEW DELHI, INDIA.

Inventors:

#	Inventor's Name	Inventor's Address
1	HARENDRA KUMAR KULSHRESTHA	ICT (R&D) CENTER, INDIA.

PCT International Classification Number

G01B 3/00

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA