DESC:FORM 2
THE PATENTS ACT, 1970
(Act 39 of 1970)
And
THE PATENTS RULE, 2003
COMPLETE SPECIFICATION
(See Section 10 and Rule 13)
1. Title: An anti-slip construction material
2. Applicant(s):
(a) Name: Addwrap Packaging Pvt. Ltd.
(b) Nationality: Indian
(c) Address: 36,37,38 Panchratna Industrial Estate
B/h Laxminarayan Petrol Pump,
Sarkhej - Bavla Road, Changodar,
Ahmedabad- 382210
Gujarat- India
3. Preamble of description
The following specification particularly describes the invention and the manner in which it is to be performed.

TITLE OF INVENTION
An anti-slip construction material.
FIELD OF INVENTION
The present invention relates to an anti-slip construction material. More particularly, the present invention relates to a lumber wrap, housewraps, and under roof layment and pond liners fused with a woven knitted material with anti-slip properties. The woven material is fused with extrusion lamination technology.
BACKGROUND OF INVENTION
Various composite sheet materials have been made for use in the packaging industry like lumber wrap, water impermeable wraps etc. These materials are tough and strong to withstand the logs and heavy building materials.
Wrapping material intend to cover goods on trucks, or the like, are well known in the art. Traditionally, such wrapping materials included tarpaulin, but these have frequently been replaced with other materials, such as polyester filament reinforce fabrics that have been coated with polyvinyl chloride. Other examples of wrapping materials in the transportation industry are lumber covers. Lumber covers tend to be specialized in their construction, being intended to wrap and protect stacks of lumber from the effects of weather during actual shipping and while the lumber sits in a yard prior to sale. A typical example of a lumber wrap is made of a woven high density polyethylene fabric that is coated on one or preferably both sides with an extrusion coating of low density polyethylene containing a particulate mineral filler.
Materials for the covering of goods during transportation and warehouses or stockyard are important for many reasons. For instance, rain and/or sun may have adverse effects on the goods, causing staining, water damage, bleaching, rusting or a variety of other adverse effects. In addition, in cold climates, sand and/or salt may be distributed on roads to overcome problems caused by snow and ice and can cause significant damage to goods—e.g., sand blasting-type effects accompanied by salt corrosion, which result from the spray of slush, salt/sand mixtures or the like from vehicles passing along the road. In other climates, spray from the ocean may similarly cause damage to goods on the vehicle. Coverings on trucks also discourage pilfering, vandalism, or the like.
One of the patents US5994242 discloses a coated woven material comprising a layer of a woven scrim formed from a thermoplastic polymer in the form of at least one of fibres, filaments and tapes; and a coating on at least one side of said layer of an elastomeric polymer of ethylene and at least one hydrocarbon alpha-olefin comonomer of at least 4 carbon atoms. The elastomeric polymer has a glass transition temperature (Tg) of less than -20° C. and a brittleness temperature of less than -80° C. The material is particularly useful as a transportation cover.
Another patent US8007616B2 discloses a breathable materials comprise a fabric layer and a polymer film layer thereon, the polymer film layer comprising a polymer composition and a filler, wherein the breathable material has undergone a physical manipulation to render the polymer film layer microporous such that the WVTR of the breathable material is greater than about 50 g/m-24 hr, and wherein the breathable material has a first length dimension and a first width dimension before said physical manipulation and a second length dimension and a second width dimension after said physical manipulation, wherein the second length dimension is no more than about 2% greater than the first length dimension and the second width dimension is no more than about 2% greater than the first width dimension. Methods of making a breathable material comprise forming a polymer film layer comprising a polymer composition and a filler; bonding the polymer film layer to a fabric layer to form a laminate; and applying a physical manipulation to the laminate to render the polymer film layer microporous such that the WVTR of the resulting breathable material is greater than about 50 g/m2-24 hr, wherein the breathable material has a first length dimension and a first width dimension before said physical manipulation and a second length dimension and a second width dimension after said physical manipulation, wherein the second length dimension is no more than about 2% greater than the first length dimension and the second width dimension is no more than about 2% greater than the first width dimension.
However, no prior art overcome the problem of slippery wraps or sheets or covers used on construction sites for works to reduce accidents due to slipping or any construction material which has anti-slip properties along with various other protective properties comprising of a woven fabric. Hence, there is a need of an invention which consists of factors that reduces accidents on construction site due to slipping and an anti-slip construction material which is economically viable, comprises of high tear strength and high tensile properties. The present invention as described in detailed invention overcomes the above problems.

OBJECT OF INVENTION
The main object of the invention an anti-slip construction material is a woven material fused with lumber wrap.
The other main object of the invention an anti-slip construction material has knitted fabric over waterproof wrap with extremely high friction properties.
Yet other object of the invention an anti-slip construction material is high tensile strength and tear resistance of the wrap.
Another object of the invention an anti-slip construction material is a multi-directional full coverage or partly coverage in a way selective anti-slip wrap.
Yet another object of the invention an anti-slip construction material is anti-slip properties due to the knotted and twisted fabric strands.
Other object of the invention an anti-slip construction material is economically viable.
The invention of a construction material with anti-slip properties is material suitable for packaging or wrapping of logs or heavy building raw materials having a layer of woven knitted fabric fused with water-proof wrap through extrusion lamination technology where the fabric is completely fused with wrap for increasing friction, tensile strength, and tear strength of the material. The fused fabric comprises of knotted and twisted strands.

BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 describes the cross-sectional view of the first woven fabric layer;
FIG. 2 A describes a knitted woven fabric layer;
FIG. 2 B describes a single strand of knitted woven fabric layer;
FIG. 2 C describes fused knitted woven fabric layer with first woven fabric layer;
FIG. 3 describes the parts of woven fabric fused with knitted woven fabric to form anti-slip construction material;
FIG. 4 describes a typical extrusion coating process used in invention.
DETAILED DESCRIPTION OF INVENTION
The approach is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to "an" or "one" or "some" embodiment(s) in this disclosure are not necessarily to the same embodiment, and such references mean at least one.
Lumber products, such as Sawn timber, GluLam, plywood, and other lumber products, for example, are typically arranged in stacks for transportation from a manufacturer to a customer, such as a retailer or a contractor. Prior to shipment, these stacks of lumber products are often wrapped in a plastic sheeting material, often including flap ends from folding, to protect the lumber products from exposure to weather and/or damage from pilfering, vandalism, or other cause. The plastic sheeting material also provides a convenient place to identify the manufacturer. The person who climbs above the wraps often slips down due to low coefficient of friction, however, the present invention overcomes all the prior art problem by fusing the lumber wrap with a knitted woven fabric by lamination technique. The invention provides a construction sheet material for packaging of logs or building materials. A layer of woven, knitted fabric is extruded on a water proof wrap with lamination technology. The woven fabric is coated multi-directionally which increases tensile strength, friction and tear strength and makes the wrap anti-slip.
Lamination is the technique or process of manufacturing a material in multiple layers, so that the composite material achieves improved strength, stability, sound insulation, appearance, or other properties from the use of the differing materials such as plastic.
FIG. 1 describes a cross-sectional view of the first woven fabric layer (10) which is selected from polyolefins such as polyethylene or polypropylene which is used to cover any object possessing properties like anti-tear, waterproof etc. The risk of a person climbing on the constructional material covered on logs or any other objects is high. Hence, to overcome the problem present invention has fused a woven knitted fabric layer (30) selected from polyolefins such as polyethylene or polypropylene wherein the first woven fabric layer (10) acts as a substrate for the knitted woven fabric layer (30) which after fusing forms anti-slip construction material.
FIG. 2A describes a knitted woven fabric layer (30) to be fused on the first woven fabric layer (10). The knitted and woven pattern as described in figure 2 makes the fabric anti-slip and the fusing of fabric above the substrates which is the first woven fabric layer (10) makes it an anti-slip construction material. The anti-slip construction material has crisscross strands with high resistance, high tensile strength, water proof, tear resistance. An optional coating on the back of the anti-slip construction material can be done comprising specific properties like anti-dust, anti-UV layer, sun protection layer, fire retardant layer, etc. The woven fabric is made of polymeric resin with hydrophilic properties. The property fusing the material on one another using lamination technology is well known in art. Fusing of a woven material in all the directions of wrap improves the tensile strength, tear strength and friction and makes it anti-slip and economically viable product.
FIG. 2B describes a single strand of the knitted woven fabric layer (30) to be fused with the first woven fabric layer (10) and FIG. 2C describes fused knitted woven fabric layer (30) with first woven fabric layer (10) through extrusion coating process. The anti-slip construction material formed after fusing the knitted woven fabric layer (30) on the substrates, the knitted woven fabric layer (30) can be fused on the whole woven fabric or parts of woven fabric as shown in FIG. 3. In some construction material the knitted woven fabric layer (30) can be fused as a single layer or a multiple layer. The wrap is laminated with 3 or 4 layers of woven fabric with lamination technology wherein the primary substrate is flat tape woven fabric laminated on both sides or only one side.
“Extrusion lamination” or “extrusion coating” refers to process by which a film of molten polymer is extruded onto a solid substrate, in order to coat the substrate with the polymer film and to bond the substrate and film together. The anti-slip construction material according to present invention comprises a layer of an open-net like fabric comprising strands of varying thickness (thick or thin strands) and an impermeable polymer film thereof. The net like strands is formed of one or more polyolefins. The polyolefins are selected from but not limited to polyethylene, polypropylene or combination of thereof. The strands are thermally or adhesively bonded at the crossover points to form a strong and stable net like fabric.
In the present invention, the anti-slip construction material is manufactured by extrusion coating the knitted woven fabric (30) with a polymer film composition to form anti-slip knots on the fabric wherein the anti-slip polymer composition with knots is fused above the first woven fabric layer (10) to form anti-slip construction material. For example, using techniques well known in the art and is illustrated in FIG. 4, a polymer film composition may be extruded from an extruder through a die (60) into a nip formed between chill rollers (50) wherein the chill roller (50) is made up of steel or silicon or rubber based material. The polyolefin composition is extruded at or above the melt temperature typically around 200-400?. Conventionally, the nip is formed between a metal roll and a rubber roll. The anti-slip sheet (30) is passed through the nip of rolls and to adhere the film to the surface of the fabric. The back side of anti-slip construction material is coated with specific properties like anti-dust, UV- protection film, heat-retardant film, anti-dust film, sun protection film or combination thereof etc. when required. The anti-slip construction material is further formed without any adhesive with the pressure applied during extrusion is 75-115 psi bars and the temperature of the chill rollers is maintained upto 15-40?. This extrusion coating of layers form anti-slip knitted woven material. The anti-slip sheet (30) may then undergo further processing, such as winding, slitting, aperturing or printing etc. The formed extrusion bonded lamination has a basis weight from 80 gsm upto 300 gsm.
The anti-slip construction material as discussed in present invention has various advantages and can be used as pond liners, lumber wraps, house wraps, steel wrapping, pallet covers, wagon covers etc.
The anti-slip construction material disclosed herein can withstand the abrasions, which often leads to tear, experienced during loading and unloading of materials because the woven knitted material fused on lumber wrap with high coefficient of friction, high tensile strength, and high tear resistance properties the protective material of present invention is economically viable and less hazardous. The anti-slip construction material further comprises of anti-slip knots on the surface of the fabric with multi-directional properties, making the working environment very safe.

,CLAIMS:We claim,
1. An anti-slip construction material comprising of;
a first woven fabric layer (10);
a knitted woven fabric layer (30) disposed above the first woven fabric layer (10);
wherein the knitted woven fabric layer (30) is non-adhesively fused with the first woven fabric layer (10) via extrusion coating, such that an anti-slip construction material is formed;
wherein the first woven fabric layer (10) is substrate for the knitted woven fabric layer (30);
wherein the knitted woven fabric layer (30) and the first woven fabric layer (10) comprises of at least one or combination of polyolefins thereof.
2. The anti-slip construction material as claimed in claim 1, wherein the polyolefins is selected from polyethylene or polypropylene polymers or combination thereof.
3. The anti-slip construction material as claimed in claim 1, wherein the temperature of fusing the first woven fabric layer (10) with the knitted woven fabric layer (30) through extrusion is 200-400?.
4. The anti-slip construction material as claimed in claim 1, wherein the pressure fusing the first woven fabric layer (10) with the knitted woven fabric layer (30) through extrusion is 75-115 psi bars.
5. The anti-slip construction material as claimed in claim 1, wherein a chill roller (50) of the extrusion is at temperature 15-40? for fusing the first woven fabric layer (10) with the knitted woven fabric layer (30).
6. The anti-slip construction material as claimed in claim 1, wherein the extrusion bonded lamination has a basis weight from 80 GSM upto 300 GSM.
7. The anti-slip construction material as claimed in claim 1, wherein the extrusion bonded of the layers is adhesive free.
8. The anti-slip construction material as claimed in claim 1, wherein the anti-slip construction material has high tensile strength, high tear resistance.
9. The anti-slip construction material as claimed in claim 1, wherein on back side of anti-slip construction material is coated with elements comprising specific protection such as sun protection layer, fire retardant layer, anti-UV layer or combination thereof.
10. The anti-slip construction material as claimed in claim 1, wherein the anti-slip construction material covers fully or partially the first woven fabric (10) for flexibility and effectiveness of anti-slip properties.
11. The anti-slip construction material as claimed in claim 1, wherein the anti-slip construction material comprises of anti-slip knots on the surface fabric with multi-directional anti-slip properties, making the working environment very safe.