Under-riders

Abstract

The invention is an attachable fabric liner for underwear, applied to the inside of underwear to protect from fecal stains and marks (‘skidmarks’) exclusively in the buttocks area. Skidmarks may be a result of improper wiping, improper cleansing or from leaking small quantities of fecal material. The invention is made of 100% cotton and is shaped to fit the user's underwear in the buttocks area. It attaches with human contact safe adhesive, coated 100% across the back fascia of the cotton. The cotton material is a ‘low twist’ thread, light weight, light weave, ‘lay flat’ jersey knit. The user cannot discern that the liner is in place. This invention is differentiated from other products since other products are made from synthetic materials, fibers, and films and others are made specifically to fit the narrow crotch area of the user's underwear instead of the buttocks area.

1 . The invention is an attachable fabric liner for underwear as shown in Drawings  FIG.  1   , which comprises:
 a uniquely shaped 100% pure cotton fabric underwear liner;   a human contact safe adhesive, (ISO 10993 tested and approved), being coated across 100% of a single side of the fabric liner;   a releasable backing paper comprised of 90 pound bleached white paper and a non-stick coating;   a non-stick, silicone coating applied to the releasable backing paper;   a releasable backing paper being attached and opposite to the adhesive coating which is on the fabric liner;   a fabric liner, the adhesive layer, and the releasable backing paper being exactly replicated in size and shape to each other.   
     
     
         2 . The attachable fabric liner for underwear as claimed in  claim 1 , is non-absorbent;
 is designed to protect underwear from stains and marks made from fecal leakage or from lack of properly cleansing or wiping in the buttocks area of the user, (aka, ‘skidmarks’),   is a non-obvious departure from other inventions since it is not an absorbent pad,   is to be used for one purpose only—to protect underwear from skidmarks.   
     
     
         3 . The fabric underwear liner as claimed in  claim 1 , is made with a unique fabric formation which is 100% pure cotton;
 is differentiated from other products that are made of synthetic materials, fibers and films,   is made of low twist, light thread weight and light weave, ‘lay flat’ material, specifically engineered, ‘Jersey Knit’, 100% pure cotton.   
     
     
         4 . The cotton fabric as claimed in  claim 3 , is configured into a ‘jersey knit’ with a cotton ‘Fabric Formation’ as follows:
 the 100% pure cotton fabric is ‘knit’ using ‘SIMPLE’, ‘SINGLE’ thread, 100% natural cotton filaments; 
 the Jersey Knit material (as differentiated from Rib Knit and from Woven Fabric) has superior ‘lay flat’ characteristics, ideally suited for the fabric liner, and since it lays flat, it can stretch as required, and will move with the motion of the underwear to which it is applied; 
 the 100% pure cotton fabric has a weight of 244.37 g or 8.62 oz per yard (‘per length’ as referenced below); 
 the 100% cotton filaments have a MINIMUM degree of twist per length, (as differentiated from a HIGH degree of twist per length), which means MINIMUM twist yields more comfort for the user; 
 the 100% cotton filament fibers are ‘SIMPLE’ as differentiated from TEXTURED, and from PLIED, and from COMPLEX, to achieve the ‘lay flat’ style that provides additional comfort for human contact; 
 the thickness of the fabric liner is approximately 0.32 millimeters; 
 the cotton yarn used for the attachable fabric liner for underwear is a ‘Simple’ Twist, Filament yarn and formed as follows:
 the Filament fibers are laid side by side, with a simple (low) twist applied (meaning the Twist in staple yarns is given in units of turns of twist per unit length, measured in turns per inch), the yarn properties are affected by the degree of twist, but not by the direction (S or Z) of twist, and as twist increases, yarn strength and yarn stiffness increase up to a point, level off, then begin to fall at very high twist levels. 
 
 
     
     
         5 . The ‘Jersey Knit’ cotton material, as claimed in  claim 1 , is manufactured in continuous rolls, 300 feet in length (91.44 meters)×64 inches in width (1.6256 meters), with an “edge dressing” applied to the material to a width of 2 inches on each edge which prevents material curl and provides useable material of 300 ft in length (91.44 meters)×60 inches in width (1.524 meters). 
     
     
         6 . The attachable fabric liner for underwear, as claimed in  claim 1 , is uniquely shaped to fit the buttocks area of underwear, as illustrated in Drawings  FIG.  1    AND  FIG.  2   ;
 is uniquely shaped to attach to underwear adjacent to the buttocks area of the user from which fecal stains and marks may occur, 
 is differentiated from other products since it is designed for the wider buttocks area only, whereas other products are designed to fit the narrower, middle crotch area of the user, 
 is proportioned and sized to easily fit inside adult and adolescent underwear, 
 aligns as a truncated oval shape with the narrow rounded end beginning at the rear crotch area and lays flat, backward and upward toward the label area of underwear, 
 does not extend to the front of the crotch area, (from which field tests have proven that many people will not tolerate pads and synthetic fiber materials because of the intrusive and crinkly feeling of fibers and pads, 
 and will not crinkle nor will it feel intrusive due the light weight and ‘lay flat’ knit of the 100% natural pure organic cotton material. 
 
     
     
         7 . The attachable fabric liner for underwear, as claimed in  claim 1 , and described in  claim 2, claim 3, claim 4, claim 5, claim 6 , is shaped as a truncated/modified oval with a straight edge on one end, and with tapered, opposing edges that extend from the straight edge to a blunt pointed end;
 and when applied, the straight edge is positioned just beneath the waist band of the underwear so that the tapered edges extend down the buttocks area of the wearer where fecal stains may occur,   and comprises following specifications;
 a front facing profile as shown in  FIG.  1    of the fabric, is a truncated/modified oval shape, 
 a beginning end of the truncated oval shape is a straight edge, 
 an opposite end of the truncated oval shape tapers to a rounded blunt tip, 
 a convex inward taper begins at the straight edge end, on each vertical edge, and extends for a length of (3.0 cm) (1.18 in) until the maximum width is achieved, 
 a straight vertical edge, on each edge, is positioned perpendicular to the vertical center line of the truncated oval shape, 
 the straight vertical edge, on each edge, begins an inward convex taper, beginning at (6 cm) (2.33 in) where the curve is terminated at the rounded blunt tip, 
 the rounded blunt tip is positioned at the vertical center line of the truncated oval shape, 
   and comprises the following measurements;
 beginning at the truncated margin of the oval, the width is (6.3 cm, 2.48) inches in width, the shape gradually broadens on each edge, in an inward convex curve for a length of (3.0 cm, 1.18 in), until a width of (8.89 cm, 3.5 in) is achieved, which is the maximum width, 
 the shape then extends vertically on each edge for (9.8 cm, 3.85 in), 
 the straight vertical edge, on each edge begins an inward convex curve beginning at (12.6, cm 4.96 in) from the straight edge until it reaches the rounded blunt end The rounded blunt end is (0.5 cm, 0.2) inches in width, 
 the overall length of the center line, from the straight edge to the rounded blunt end is (17.8 cm, 7 in), 
   and comprises the following thickness measurement;
 the release liner paper backing is (0.17 mm) thick +/−10%, 
 the cotton material is (0.32 mm) thick +/−10%, 
 the overall thickness is (0.49 mm)+/−10%, 
   and comprises the following weight measurement;
 the total weight of each underwear liner, including the release liner component is (3.06 grams, 0.1079 ounces) +/−10%. 
   
     
     
         8 . The adhesive applied to the underwear liner, as claimed in  claim 1  is uniquely engineered and configured to cover the entire back fascia of the 100% pure cotton material, instead of just an edge boundary adhesive;
 enabling the cotton material to stay in place and lay flat, side to side and top to bottom, without bunching or curling and will not ‘wedge’ into buttocks areas as could thicker fiber and pad products, 
 the pressure sensitive adhesive being ISO 10993 tested and approved for medical devices and for human skin contact so that any contact with human skin, although unlikely, will not cause irritation or discomfort for the user, 
 the adhesive being an acrylic pressure sensitive ‘FREE RELEASE LEVEL B’ (a relative rating scale), specifically engineered for this use, meaning that the liner body can be applied to the underwear and subsequently removed without the adhesive adhering to the garment, 
 and, the relative adhesion release property scale is;
 ‘FREE RELEASE’ (B)
 vs EXTRA FREE (A) 
 vs STANDARD (C) 
 vs TIGHT (D). 
 
 
 
     
     
         9 . The attachable fabric liner for underwear as claimed in  claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, claim 7, claim 8 , includes four mandatory component layers, each layer being a critical factor in the composition and effective use of the product;
 and the technical details of each layer described in prior claims, and with the importance of each component and the relationship to each other is specified below in which the attachable fabric liner for underwear includes;
 a backing paper layer component, 
 a silicon release coating layer component, 
 an adhesive layer component, 
 a 100% pure cotton liner layer component, 
 the backing paper layer component being 90 pound bleached white paper, which is required as a carrier for the underwear liner until it is removed from the paper and applied for use, and having a caliper thickness of (0.17 mm)+/−10% and a weight of (143 gms/m 2 ), 
 the release coating layer component being a silicone coating applied to the backing paper layer component that enables the release (removal) of the cotton material from the backing paper, the adhesive layer component being released along with the cotton layer component, 
 the adhesive layer component being an acrylic pressure sensitive ‘FREE RELEASE LEVEL B’ adhesive, and being ISO 10993 tested and approved for medical devices and for human contact, 
 the 100% pure cotton liner layer component being a single piece of light weight, non-intrusive, not noticeable, lay flat, jersey knit material 
 in which these four critical components mean that the attachable underwear liner can be removed easily from the releasable backing paper and then applied to the underwear, and the cotton material will stay firmly in place using the Free Release adhesion vs. Extra Free adhesion vs. Standard vs. Tight adhesion, additionally meaning that the liner can be removed from the underwear and the adhesion properties will still be effective, 
 with the thickness measurement as follows;
 the releasable backing paper being (0.17 mm) thick +/−10%, 
 the cotton material being (0.32 mm) thick +/−10%, 
 the overall thickness being (0.49 mm)+/−10%, 
 
 with the weight measurement as follows;
 including the backing paper, the weight is (3.5 grams, 0.125 ounces)+/−10%.