MXPA00012666A - Load limiting webbing - Google Patents

Abstract

The present webbing has a force-displacement profile characterized by:(a) when the webbing is subjected to a knuckle point force in the range from about 400 pounds (about 1.8 kilonewtons) to about 900 pounds (about 4.0 kilonewtons), the webbing elongates to less than about five percent;(b) upon subjecting the webbing to greater than the knuckle point force and to less or equal to about 1, 400 pounds (about 6.2 kilonewtons), the webbing elongates further to at least about ten percent;and (c) upon subjecting the webbing to greater than 1,400 pounds (about 6.2 kilonewtons), the modulus increases sharply and the webbing elongates further until the webbing breaks at a tensile strength of at least about 5,000 pounds (about 22 kilonewtons). The present webbing is useful for seat belts, parachute harnesses and lines, shoulder harnesses, cargo handling, safety nets, trampolines, safety belts or harnesses for workers at high altitudes, military arrestor tapes for slowing aircraft, ski tow lines, and in cordage applications such as for yacht mooring or oil derrick mooring.

Description

TAPE FOR LIMITED LOAD BACKGROUND OF THE INVENTION A typical vehicle seat safety belt system 3 is designed to restrict the displacement of an occupant with respect to the sitting position of the occupant inside the vehicle when the vehicle experiences a sudden, sharp deceleration (See Patent. US 3 322 163) A typical 0-seat belt has three main portions of the retractor belt, the torso belt and the lap belt and the operation of each belt can be characterized by its force displacement curve. The area under the curve of Force displacement is termed as the energy absorbed by the safety restriction Current vehicle safety seat belts are made of fully stretched polyethylene terephthalate ("PET") fiber that is partially or partially relaxed (2 7%) and that has a tenacity of at least 7 5 grams / demer and 14% elongation at break The regulation gubernam In the USA, it is required that the seat belts should withstand loads up to 2 721 60 kilograms (6,000 pounds). However, there is a problem with the current PET fiber seat belts. The impact studies indicate that after the Initial impact of the vehicle (v gr at a speed of approximately 66 71 kilometers (36 miles) per hour), the occupant tends to) move forward from its seated position until the belt engages the built-in restraining forces As indicated in Figure 1 the non-yielding cmturon relatively made of PET fiber exerts a force of at least 2 000 liters (approximately Q 9 000 Newtons) against the occupant in the torso position of the seat cmturon so as to cause the occupant to have damage elevated chest, rib box head neck and back when the occupant bounces and impacts the back structure of the seat assembly 5 When a car collides with a veil 66 71 km (35 miles) per hour an impact energy that an average-sized person in the car undergoes is at least 500 joules in the torso cmturon Even though the current PET fiber can absorb the energy of Impact Damage to Vehicle Occupant Still Occurs Due to the Undesirable Friction Displacement Curve of the Fiber In 70 milliseconds a passenger of average size will experience high forces of up to 2,000 pounds (approximately 9,000 Newtons) as shown in the Figure In order to absorb the impact energy and to reduce the load of the seat belt against the occupant of the vehicle, US Patent 3,550,957 discloses a shoulder harness having double stitched sections of the belt disposed above the occupant's shoulder in a manner that the seam allows the tape to extend from an initial length to a final length at a controlled rate under the influence of a restraining force However, the stitched sections do not provide the desirable amount of energy absorption, do not provide uniform response, and are not reusable in multiple crashes. See also US Patent 4,138,157. US Patent 3,530,904 describes a finished fabric which it is constructed by weaving two kinds of yarns having relatively different physical properties and demonstrating energy absorption capacity US Patents 3,296,062, 3,464,459 3,756,288 3,823,748, 3,872,895, 3,926,227, 4,228,829, 376 440 and Japanese Patent 4-257336 further describe tapes that are constructed of multiple kinds of warp yarns having different tenacity and elongations at break DE 19513259A1 describes tapes that are constructed with short warp yarns that will absorb the stress load initial that acts on the tape and also longer warp ice that will absorb the subsequent stress load acting on the tape Those experienced in this technical area have recognized the deficiencies when using at least two different types of yarns as taught by the previous references US Patent 4, 710 423 and Kokai Patent Publication 298209 published on December Ia, 1989 ("Publication 298209") teach that when at least two different types of yarn are used, the absorption of energy occurs in a stepwise manner and in this manner, the tape does not absorb the energy continuously and evenly. Therefore, after one type of wire absorbs a portion of the impact energy and before another type of wire absorbs another portion of the impact energy, the human body is exposed to An Undesirable Shock UK Patent 947,661 discloses a seat belt that is subjected to an elongation greater than or equal to 33 percent when subjected to at least 70% of the breaking load. This reference does not teach or suggest the present thread. LOAD LIMITATION US Patent 3 486,791 discloses energy absorbing devices such as a wound device that separates a loose section of the belt from the restriction section of the belt. Tensioning means by clamping means that yield under a predetermined restraining force to gradually feed the loose section so that the taut section is lengthened allowing the restricted body to move at a controlled speed. The reference also describes a device that anchors the belt to the vehicle by an anchor member fixed to the frame and embedded in a solid plastic energy absorber These kinds of mechanical devices are expensive, are not reusable, provide low energy absorption and are difficult to control. An improvement over the above devices is taught by the US Patent 5,547,143 which discloses a load absorption retractor comprising a rotating reel, a seat belt strap secured to the spool, and at least one movable bushing, which responds to the loads generated during a shock situation, by deforming a portion of the reel and by doing so dissipating a quantity This type of mechanical device is integrated with a specific amount of load limitation and energy absorption towards occupants of a certain size, and can not be adjusted to the needs of occupants of different size in the real transport scenario. this kind of mechanical device is not reusable to limit the load in multiple crashes since the spool is permanently deformed in the first crash of the vehicle i US Patent 4,710,423 and Publication 298209 describe tape comprised of relaxed polyethylene terephthalate ("PET") yarns having tenacity of at least 4 grams / demer and a final elongation of 50% to 80% due to the inherent physical properties of the PET yarn ( v gr, glass transition temperature = 75SC) the examples of US Patent 4,710,423 and Publication 298209 show that at 5% elongation, the load has already reached more than 1,500 pounds (approximately 6,700 Newtons). damage to the occupant by the seat belt still exists and in this way, the belt material needs to be further modified. The examples in these two patents also show that if the PET yarn relaxes excessively, the yarn tenacity drops to 2 3 0 grams / denier Kokai Patent Publication 90717 published April 4, 1995 describes fiber-based energy absorption appointment of polybutylene terephthalate ("PBT") homopolymer of high strength Tenacity of the fiber is more than 5 8 grams / denier, the elongation at break is more than 18 0% and the stress at 10% elongation is less than 3 0 grams / denier However, this reference fails to teach fiber of PBT demonstrating the initial stress requirement that engages the seat belt to protect the occupant and the medium to control the initial stress barrier A low initial thread stress barrier results in a point of low knuckle strength of the finished seat belt which allows excessive excursion of the occupant and leads to serious damage The present inventors in the commonly assigned US patent application Serial No. 08 / 788,895, filed on April 18, 19971, the allowed US patent application No. 08 / 819,931, filed March 18, 1997 and US Patent Application Serial No. 09/083 493 filed May 22, 1998, have provided a load limiting seat belt with an absorption of improved energy, which has a smoother operation than that of the known sewn tape approach or the known use of at least two different fibers is reusable in multiple shocks unlike the mechanical fastener approach and known device and also directs the ability to control The barrier of initial effort and the absorption of impact energy from vehicle occupants of different sizes See also Murphy T, "Buckling Up for the Future", WARD 's Auto World, 95 (1997) It would be advantageous to have a process to dye and stabilize the load limitation seat belt with improved energy absorption including an acceptable knuckle point force, where the process would not be detrimental to the belt's energy absorption properties. Known processes for dyeing PET fiber exist. US 2,934,397 and 3,098 691 teach a process of dyeing PET fiber discharge that c it comprises treating the fiber around the boiling temperature, i.e., 100 ° C., with an aqueous dispersion of a dispersion dye in the presence of a carrier comprising dimethyl ether or dioxane respectively. US Patent 3,154,374 teaches a process for improving fiber of PET by dyeing, which comprises treating the filaments for a period of 104 seconds to ten seconds at a temperature of 200 ° C to 350 ° C with a casting agent, v dimethyl ester of sebacic acid, before dyeing. Those experienced in this technical area have recognized deficiencies in using the carrier as taught by the above references The background section of US Patent 3,841,831 teaches that the so-called "carrier" process is not completely satisfactory since the addition of carrier makes the dyeing process more expensive and the colors obtained by this method have had less than the desired firmness. often exhibit some degree of toxicity, often have strong odors, and can be difficult to remove from fibers This reference also teaches a process for dyeing PET fiber by dipping the fiber in dyeing liquor for more than ten minutes and using dry heat at a temperature between 120SC to 230SC Man-Made Fibers, Volume 3, page 537 (1968) teaches the thermosol process which involves lining fabric with aqueous dispersion of water insoluble dye, drying the lined fabric, and exposing at high temperature (120 to 200SC) US Patent 3,418,065 teaches a process for dyeing fabrics comprising PET fibers using steam at approximately 120 ° C under pressure in a sealed container US Patent 3,614,798 teaches a process for establishing a reactive dye on a dyed ribbon wherein the process comprises passing the ribbon or tension of 28 12- 35 15 kilograms per square centimeter (400-500 pounds per square inch) through a vapor atmosphere at about 104SC at superatmospheric pressure 0 09-0 16 kilograms per square centimeter (1 3-2 3 pounds per square inch) until the dye is established US Patent 3 895 909 teaches a process of dry dyeing, washing, and drying of PET fabrics for seat belts Dyed and pre-dried fabrics are heat-sealed in an infrared oven set at a temperature of approximately 2052C which is close to the PET melting temperature of 2659C Example 1 shows that the tension on the contraction belt varied from 45 36 -136 08 kilograms (100-300 lbs) See also British Patent 1 556 917 It would be desirable to have a process for effectively dyeing cargo limitation seat belts while especially making the stress-fatigue curve of the resulting dyed belt. , as the use of polyester materials has increased in the automotive industry, it becomes more necessary that the polyester meets the requirements of dye fixation and Ultraviolet ("UV") Stability US Patent 4,902,299 teaches that the automotive industry requires dyed fabrics to withstand 488 8 kilograms / meter2 (KJ / m2) of exposure in the Xenon Arc Weather-O ether. UV light (outdoors) presents a serious problem, such as a high level of ink fading, loss of resistance degradation of physical property and change of stress-fatigue curve of the seat belt of load limitation It would be desirable to have a belt of load limiting seat with good ink fixation and improved UV stability SUMMARY OF THE INVENTION The present invention responds to the above needs by providing a belt having a force displacement profile characterized by (a) when the belt is subjected to a knuckle point force on the scale of approximately 400 pounds (about 1 8 kilonewtons) to around 900 pounds (approximately 4 0 ki lonewtons), the tape stretches from less than about five percent, (b) by subjecting the tape to more than knuckle point strength and less or equal to about 1,400 pounds (approximately 6 2 kilonewtons), the tape lengthens further to at least about ten percent, and (c) when the tape is subjected to more than 1,400 pounds (approximately 6 2 kilonewtons) the module sharply increases and the tape is further lengthened until the tape breaks at a tensile strength of at least about 5,000 pounds (approximately 22 kilonewtons) Preferably, the tape in part (a) is stretched to less than about three percent Preferably, the tape in part (b) is lengthened to at least about 15 percent The term "knuckle point force" as used herein means about the curve of displacement of force, a point of intersection of an extrapolation line from a sharply inclined portion of the curve appearing at an initial stage of stretching of the belt with an extrapolation line from a slightly inclined portion of the curve appearing after stretching Initial tape For example, see Figure 2 The term "module" as used herein means the inclination of the force displacement curve The present invention is advantageous because the present tape has better absorption of impact energy and a smoother operation than that of the known sewn tape approach or the known use of at least two different fibers, is reuse unlike the known mechanical device, and also directed to the ability to control the initial stress barrier and the impact energy absorption The present invention also provides a process for dyeing and stabilizing the tape while maintaining the stress curve -desirable screening of the tape Other advantages of the present invention will become apparent from the following description, accompanying drawings, and appended claims BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 illustrates the operation (with load as a function of time) of a poly (ethylene terephthalate) homopolymer seat belt known in the torso position in a vehicle crash Figure 2 illustrates a stress-fatigue curve of the tape of the present invention. Figure 3 illustrates a stress-fatigue curve of the wire useful in the present invention. Figure 4 illustrates the tape dyeing process of the present invention. Figures 5 (a ), (b) (c), and (d) illustrate stress-fatigue curves of Examples 1 to 4 of the invention Figure 6 illustrates the operation (with load as a function of time) of the load limiting tape of the present invention in the torso position in a vehicle collision DETAILED DESCRIPTION OF THE INVENTION Referring to Figure 2, the present invention provides a belt having a force displacement profile characterized by (a) when the belt is subjected to a knuckle point force on the scale of about 400 pounds (approximately 1 8 kilonewtons) to around 900 pounds (approximately 4 0 kilonewtons), the belt stretches to less than about five percent, (b) when the belt is subjected to more than knuckle point strength or less or equal to approximately 1 400 pounds (about 6 2 ki lonewtons), the tape is further lengthened to at least about ten percent, and (c) by subjecting the tape to more than 1,400 pounds (approximately 6 2 kilonewtons), the module increases sharply and the tape is further lengthened until the tape breaks at a tensile strength of at least about 5,000 pounds (about 22 ki lonewtons) The tape is made of a yarn spun from a polymer having a glass transition temperature on the scale of preferably from about -40 ° C to about + 70 ° C, more preferably about -2 ° to about + 60 ° C and more preferably about + 35 ° C to about + 55 ° C The polymer can be a homopolymer, random copolymer, diblock copolymer, triblock copolymer or segmented block copolymer. Examples of preferred homopolymers include full poly trimetre terephthalate, polusobutylene terephthalate, and long chain alkylene terephthalates and naphthalate polymers. examples of preferred random copolyesters include copolyester which in addition to the terephthalate unit of et The component contains components such as ethylene adipate ethylene sebacate or other long chain alkylene terephthalate units. This component is present in an amount greater than 10 percent. Examples of preferred block copolymers include diblock, tpblock and segmented block structure. Block copolymers comprise at least one hard crystalline aromatic polyester block and at least one soft amorphous aliphatic polyester block. The crystalline aromatic polyester includes homopolymers such as polyethylene terephthalate ("PET"), polytrimethylene terephthalate terephthalate full polybutylene. polusobuty full terephthalate, poly (2, 2-d? meth? propylene), poly [bis- (hydroxymethyl) cyclohexene terephthalate], polyethylene naphthalate ("PEN"), polybutylene naphthalate, poly [naphthalate] bis- (hydroxymethyl) -cyclohexene talate], other polyalkylene or poly-alkylalkylene naphthalates and the mixed polyethers which, in addition to the ethylene terephthalate unit, contain components such as ethylene isophthalate, ethylene adipate, ethylene terephthalate sebacate 1,3-c-chlorhexylene dimethylene, or other long-chain alkylene terephthalate units Commercially available aromatic polyesters can be used A mixture of aromatic polyesters can also be used The most preferred aromatic polyesters include PET and PEN Preferably, in the block copolymer, the amorphous aliphatic polyester block is made of lactone monomer Preferred lactone monomers include e-caprolactone, propiolactone butyrolactone valerolactone and higher cyclic lactones The most preferred lactone monomer is e-caprolactone. Commercially available lactone monomers can be used. Two or more types of lactones can be used simultaneously. The PET-polycaprolecone block copolymer can have a polycaprolactone concentration of preferably from about 10 to about 30 weight percent. In the block copolymer, the concentration of polycaprolactone can be varied to achieve tape having the initial stress barrier Desired and absorption of impact energy with load limiting operation Preferably, the process for making a useful block copolymer in the yarn of the present charge limiting tape occurs in a twin screw extruder and comprises the consecutive steps of ( A) sending aromatic polyester melt to an injection position in a twin screw extruder wherein the aromatic polyester melt has (i) an intrinsic viscosity which is measured in a mixture of 60/40 by weight phenol and tetrachloroethane and is at least about 0 6 deci 1 itro / grarno and (ii) a Newtonian melt viscosity which is calculated to be when less about 7,000 poises at 280SC, (B) inject lactone monomer towards the -1! molten aromatic polyester from step (A) (C) dispersing the injected lactone monomer towards the aromatic polymer melt so that a uniform mixture is formed in less than about thirty seconds and (D) reacting the uniform mixture resulting from the step ( C) at a temperature of about 250aC to about 280SC to form a block copolymer All steps (A) to (D) occur in less than about four minutes of residence time in the twin screw extruder Step (A) to make the block copolymer in a twin screw extruder comprises sending aromatic polyester melt to an injection position. The aromatic polyester is added to the twin screw extruder. The aromatic polyester can be melted and then fed by a melt pump to the extruder. Double screw or aromatic polyester can be fed in pellet form fed by a feeder of loss weight to The double screw extruder and then melt into the twin screw extruder As those skilled in the art know, a weight loss feeder has a hopper filled with granules and the feed rate is controlled by weight loss of the granules from the Hopper If the aromatic polyester melt from a reactor is used as the starting material, nearby transport elements can be used to send the melting downstream. If the aromatic polyester granules are used as the starting material, preferably elements of open, open-to-closed and closed-open transport are assembled below the feed position in the twin-screw extruder to melt the granules and send the downstream melt to the injection position. It has been found that using a twin screw extruder by mixing and the reaction of the aromatic polyester melt with the mon Lactone oxide having a drastic viscosity difference becomes feasible The useful double screw extruders are commercially available however, the mixing elements and the sequence of element arrangement thereof in the twin screw extruder needed for the present invention are critical and are described below. Preferred double screw extruders are double screw extruders of m-coupling. A single screw extruder such as taught by US Patent 4,045,401 is not useful in the present invention because an extruder single screw does not provide rapid mixing residence time, residence time distribution, melt stirring and process control required for the present invention The initial extrusion temperature exceeds the melting point (as measured by Perkin-Elmer Differential Scanning Calorimeter (DSC) from the maximum of the endotherm resulting from scanning a sample of 2 milligrams at 20SC per minute) of the aromatic polyester used. The melting points of the preferred aromatic polyesters are 250aC for PET and 2669C for PEN. The preferred initial extrusion zone temperature is at least about 30C above. of the melting point of aromatic polyester In this way, the preferred initial extrusion temperature for PET is at least about 280aC while the preferred initial extrusion temperature for PEN is at least about 296aC Step (B) to make the copolymer of block comprises injecting lactone monomer towards the molten aromatic polyester d step (A) Preferably a piston pump is used to inject the lactone monomer at a constant rate towards the aromatic polyester melt. Preferably the lactone monomer is pre-mixed with catalysts at room temperature. Commercially available catalysts can be used. Preferred catalysts are metal-based organometallics such as lithium, sodium potassium, rubidium, cesium, magnesium, inorganic acid salts, organic acid salts of oxides and calcium alkoxides, barium, strontium zinc, aluminum, titanium, cobalt, germanium, tin, lead, antimony, arsenic. boron cadmium and manganese, and their organometallic complexes The most preferred catalysts are organic acid salts and organometallic compounds of tin, aluminum, and titanium. The most preferred catalysts are tin diacylate, tin tetraacrylate dibutyltin oxide, dibutyltin octonate dilaurate tin tetraacetate d tin aluminum tbisobutyl, acet aluminum acetate aluminum isopropoxide aluminum carbosylates, tetrabutyl titanium, germanium dioxide antimony trioxide, profipna and phthalocyanine complexes of these metal ions Two or more types of catalyst can be used in parallel Preferably, the amount of catalyst used is from about 0.01 to about 0.2 weight percent based on the combined weight of aromatic polyester and lactone monomer. Step (C) to make the block copolymer comprises dispersing the injected lactone monomer towards melting the aromatic polymer so that a uniform mixture is formed in less than about thirty seconds, and preferably, in less than about twenty seconds. The phrase "uniform blend" as used herein means uniform distribution of the lactone monomer towards aromatic polyester melting Preference is given to combining mixers n distribution to disperse the injected lactone monomer towards the high melt viscosity aromatic polyester melt This rapid uniform mixing formation results in uniform ring opening polymerization of lactone, uniform block copolymer product and stable downstream process Preferably, at least one feed distribution mixer, at least one neutral distribution mixer and at least one reverse distribution inter-feed combination mixer are used to achieve the desired mixing step. (D) to make the block copolymer comprises reacting the uniform mixture resulting from step (C) at a temperature from about 250 ° C to about 280 ° C to form block copolymer in less than about four minutes The mixture is further advanced stream down to a reaction zone and n where turbulent flow apparatus mixers and transport elements are assembled Turbulent flow devices are used to continuously stir the melt, increase the extruder volume without sacrificing the production rate and control the reaction time The hydroxyl end group of the aromatic polyester initiates ring opening polymerization of the lactone ba monomer or catalytic conditions to form lactone block at the end of the aromatic polyester The melt is constantly stirred by the apparatus to cause turbulence and mixing elements to homogenize the reaction This short reaction time minimizes the transestep fication while ensuring the complete reaction which means polimepzar the lactone monomer to form the block in the aromatic polyester chain end and complete consumption of the injected lactone monomer To determine the residence time and residence distribution time color granules are added that served as a marker to the aromatic polyester granules. residence "means the p time period starting from the addition of the color granule to the appearance of stronger color The term "residence distribution time" means the time scale starting from the appearance of color and ending with the disappearance of color As it decreases the residence distribution time the product uniformity increases The residence distribution time is preferably less than about three minutes and more preferably less than about one minute Preferably the degree of transestep fication between the aromatic polyester and the Lactone blocks is less than five weight percent of the weight of combined material Preferably, the block copolymer melt then in step (E) is devolatilized or vacuum in the twin screw extruder to remove the monomer from residual lactone The devolating element allows the formation of thin polymer fusion film and sup Elevated surface for effective removal of volatiles Preferably, after devolatilization, ultraviolet absorbers antioxidizing pigments, and other additives then in step (F) are injected and dispersed towards the copolymer melt in the twin screw extruder by a pump piston or a gear pump at a constant rate The interengrand mixers of forward distribution are used to homogenize the additives in the copolymer The melt on the temperature scale of about 2409C to about 2809C is then sent downstream to the Melt Measuring Pump for Fiber Spinning The seat belt based on PET-Polycaprolactone block copolymer ("PET-PCL") in the present invention has significantly increased weathering when stabilizing compounds are incorporated such as at least one ultraviolet absorber compatible with polymers and / or est light stabilizer of hindered amine ("HALS") and / or at least one antioxidant towards block copolymer fusion Stabilization compounds found particularly advantageous for PET-PCL are (1) about 0 1 to about 2 0 percent at least one ultraviolet absorber compatible with the polyester based on the weight of the PET-PCL, to which are added, and / or (2) about 0 1 to about 20 percent by weight of at least one HALS compound, and / or (3) about 0.1 to about 2 weight percent of at least one antioxidant compound. Preferably, the PET-PCL is stabilized with about 0.2 to about 20 percent by weight of at least one ultraviolet absorber and / or from about 0 3 to about 0 7 weight percent of at least one HALS as described herein. Preferred ultraviolet absorbers are benzothenic benzotriazole-based stabilizers, tpazmas, and oxanilides. Types of stabilizer can be used in parallel Examples of benzophenones useful in the present invention include but are not limited to 2, 4-d? H? Drox? Benzo-tenone, 2-hydrox? -4-methox? Benzophenone, 2-hydrox? -4-tert-butoxybenzo-phenone, 2-hydrox? -4-octox Benzophenone 2-h? Drox? -4-dodec? Lox? Benzo phenone, 2-h? Drox? -4-stearox? -benzophenone 2-h? Drox? -4-phenoxybenzophenone 2-h? Drox? -4- (beta -hydroxyethoxy) benzo-phenone 2-h? drox? -4 -. { 2 '-h? Drox? -3' -acri loxi-propoxy) benzo-phenone 2-h? Drox? -4- (2'-h? Drox? -3 '-metacri loxipropoxy) benzophenone, 2,2'-d H? drox? -4-butox? benzophenone 2,2 '-d? h? drox? -4-octoxibenzo phenone, 2,2' -d? h? drox? -4-octox? benzo phenone, 2 2 ' -d? h? drox? -4-laurox? benzophenone, 2,2 ', 4'4-tetrahydroxybenzo-phenone, 2,2'4-tr? -hydro? -4-methox? -benzo-tenone 2 -h? drox? -4-methox? - '-chlorobenzophenone 2 2'-d? h? drox ?, 4 4' -dimethoxybenzophenone, 2-hydrox? -4-methox? -2 '-methyl 1-4 '-hydroxybenzo-phenone, 2-hydroxy-4-methox-4'-tert-butylbenzofenone 2-hydrox- 4-methox-4'-rhenethyl-benzophenone, 2-hydroxy? 4, 4'-dimethoxybenzophenone, 2-hydroxyl-4, -2'-trimethoxybenzophenone, and the like Examples of benzotriazoles useful in the present invention include, but are not limited to l- (2'-h? drox? -5 '-methyl-phenyl) benzotpazol, 2- (2'-h? drox? -3' 5 '-di-tert-butyl-phenyl) benzotpazol, 2- (2'-h? drox? - 3 ', 5'-d? -ter-but? L-feml) -5-chlorobenzotpazol, 2- i 2' -h? Drox? -3 '5'-d? -te r-am? lfen? l) benzo pazol 2- (2 '-h? drox? -3' -ter-bt? l-5 '-methyl phenyl) -5-chlorobenzo-triazole, 2- (2'-h Drox? -5'-er-butyl phenyl) benzo riazole 2- (2'-hydrox? -5-ter-oct? lfen? l) benzotriazole, 2- (2'-h? drox? -3 ' -sec-butyl-5'-tert-butylphenyl) benzotriazole 2- (2'-h? drox? -3 '- (3", 4", 5", 6" -tetrahydro f talimidomethyl) - 5-methyl phenyl) benzotriazole 2- (2'-hydroxyl) -bentoi loxi-phenol) benzotriazole, 2- (2'-hydrox? -4'-p-met i 1 -benzoyloxy) tenyl \ benzotpazol 2-? 2'-h? drox? -4 '-p-chlorobenzoi loxi ten? l) benzotpazol, 2- (2'-h? drox? -4'-p-benzo? lox? phen? ) -5-chlorobenzotrol azol, 2- (2'-h? Drox? -4 '-p-met-1-benzolloxy-phenyl) -5-chlorobenzotrlazo1, 2- (2H-benzotpazol-2? 1) -4 6-b? S- (1-met? Ll-phen? Let? L) phenol, and the like Examples of tpazines useful in the present invention include, but are not limited to 2- (4-6 d? phen? l-1 3, 5-tpaz? n-2-? l) -5-hex? loxi phenol, 2- [4 6-b? s (2 4-d? met? l phenyl) -1, 3 5-tpazm-2-? l] -5-oct? lox? phenol and the like Examples of oxanilides useful in the present invention include, but are not limited to 2-ethoxy-2'-ethyloxyanilide, 5-tert-butyl-2-ethoxy-2'-et i loxianilide, propandioic acid, [(4-methoxyphenyl) -methylene] -, bis- (1, 2, 2, 6, 6-pentamet-l-4-piperidyl) ester and the like Two or more can be used in parallel types of ultraviolet absorber The HALS useful in the present invention are based on hindered amine compounds Examples of these include, but are not limited to 1 1 '- [2 3 -e tndi I] -b? s [3, 3 , 5, 5-tetramethylpiperazamine], dimethyl ester polymer with 4-hydroxyl-2, 2, 6, 6-tetramet and 1-1-pipepdmethane, b? S (1, 2.2 6, 6 pentamet? l-4-p? pepd? n? 1) -sebacate, b? s [2,2,6,6-tetramet? 1-4-p? Per? D? N? L] -decandioate, b? S (l, 2,2,6, 6-pentamet? O-4-p? Per? D? N) -2- [[3 5-b? S (l, ld? Met? Let? L) -4-h? Drox? phenyl] met? l] -2-butyl-propanedioate, poly (2, 2, 6, 6-tetramet and 1-4-p? pepd? n? l) -minomethylene (2 2 6 6-tetram? l-4-p? per? din) írnino [6- (oct? lam? no) -l, 3, 5-tpaz? n-4, 2, -dulo], benzoate 2 2 6 6-tetramet? L-4-p? Per? D? N? Lo, tetrakis (2, 2, 6, 6-tet amet i 1-4- pipen din íloxi (si tin, 1,6-hexand ? am? na N N'-b? S? 2 2 6 6-tetramet? L-4 '-piperidini 1) pol yorro with morpholine-2, 4,6-tpchloro-1,3,5-tr? Az? Na, poly [6 (-morfolmo-2-tr? Az? N-2, 4, -dul) [2 2 6 6-tetramet? L-4-pipepdil) imam] -hexamet lien [2,6,6-tetramethyl] -4-pipepdil) imam]], and the like Two or more types of HALS can be used in parallel The antioxidants useful in the present invention are those which are generally compatible with polyester. Preferred antioxidants are additives based on hindered phenols, hindered benzoates hindered amines, and phosphites / phosphonics Examples of these include but are not limited to tetrakis- [meth? len (3, 5, -dite-but? L-4-hydrox? -hydro-namate)] -methane, b? S [3- (3'-tert-but-11-4-hydrox? 5'-methylphenyl) -propionate] of triethylene glycol, and tr? S (2,4-d? -tert-butyl phenyl) phosphite Two or more types of additive can be used in parallel The use of UV absorbers, HALS, and antioxidants improves the light fixation of the seatbelt by at least a gray scale rating and prevents the degradation of the load limiting performance of the seatbelt. The uniform fusion is then fed to a spinning container containing a sieve filtration and one row The extruded filaments are pulled through a heated sleeve, cooled quickly by ambient air, applied with water-soluble spinning finish, and then worn by band at a certain speed. The yarn as it is spun is then Stretches completely with a high stretch ratio to obtain maximum strength The relaxation stage shrinks the hil and produces the yarn with the desired stress-fatigue curve shown in Figure 3. The resulting yarn has a force displacement profile characterized by a) when the yarn is subjected to an initial stress barrier of about 0 8 grams or less. / demer to less than or equal to about 1 2 grams / denier, the yarn is stretched to less than 5 percent and has an initial modulus on the scale of about 30 grams / denier to about 80 grams / denier b) al subjecting the yarn to more than the initial stress barrier and less than or equal to about 1 5 grams / denier the yarn is further lengthened to at least about 8 percent and c) when submitting the yarn to more than 1 5 grams / denier , the module increases sharply and the yarn is further lengthened until the yarn breaks at a tensile strength of at least 6 grams / denier where the yarn comprises a multiplicity of fibers and all fibers have substantially the same profile from Displacement of twist The resulting yarn can be used directly to weave in a finished seat belt. Seat belts are usually woven with at least 300 warp yarns with a denier of about 800 to about 2,000 and preferably about 1,000. at about 1,500 denier, a breaking strength of at least about 6 grams / denier, and a filament denier of about 2 to about 30, and a spinning yarn line with a denier of about 200 to about 1,000, a breaking strength of at least about 5 grams / denier and a filament denier of about 1 to about 1,000 Each end of warp yarn may consist of approximately 100 filaments The warp yarn denier and / or the denier of The filament in warp yarn can be varied to improve the lateral stiffness of the tape. The weaving patterns are normally selected to fill the dif Different customer specifications One of the commonly used patterns is 2x2 crossover fabric It is also important that the weaving process to retain the elastic properties and strength of the yarn to achieve the load limiting tape with the breaking strength that fill The specification of the government '• V • The present process to make the load limiting tape comprises the step of heating the belt to a temperature of about 120SC to about 1809C under sufficient tension or shrinkage so as to achieve the treated tape that has a force displacement profile characterized by i) when the belt is subjected to a knuckle point force on the scale of about 400 pounds (about 1 8 kilonewtons) to about 900 pounds (about 4 0 kilonewtons), the belt is lengthened to less than about five percent, n) by subjecting the tape to more than the knuckle point strength already less than or equal to approximately 1,400 pounds (about 6 2 kilonewtons), the tape lengthens further to at least about ten percent and ni) by subjecting the tape to more than 1,400 pounds and about 6 2 kilonewtons), the tape increases sharply and the tape it is further lengthened until it breaks at a tensile strength of at least about 5,000 pounds (approximately 22 kilonewtons) Depending on the desired end properties of tape, the tape heated to a temperature of about 120 ° C to about 180 ° C may be stretched , relax, or do not stretch or relax In order to stretch the tape, the speed of the ribbon feed roller towards thermosol is less than the speed of the roller that receives the tape from the thermosol To stretch the speed of the roll that receives the tape from the thermosol is preferably less than or equal to 20 percent more preferably less than or equal to 10 percent, and more preferably e less than or equal to 5 percent greater than the speed of the roller that feeds the ribbon to the thermosol. In order for the belt to relax, the speed of the roller feeding the belt toward the thermosol is greater than the speed of the roller that receives the tape from the thermosol For relaxation, the speed of the roller feeding the tape towards the thermosol is preferably less than or equal to 20 percent, more preferably less than or equal to 10 percent and more preferably less than or equal to 5 percent greater than the speed of the roller receiving the tape from the thermosol. Preferably, the present process for making load limiting tape comprises dyeing the tape. Preferably, the process comprises additional between the step of before the heat treatment of the tape degreased from the tape and / or filling the tape in a dye bath Preferably, the process additionally comprises the step after filling and before the treatment t It is preferred to dry the filled tape at a temperature range of about 60 ° C to about 170 ° C. Preferably, the belt conveyor for raw cargo limitation seat is immersed in an aqueous ink bath containing dispersed dyes, dispersing agent / agent leveling, wetting agent, antimigration agent, and acid donor to maintain the pH of the bath at 4 8-5 0 The dye bath may also contain dispersed ultraviolet absorbers, antioxidants, and other additives to further improve the fixation of Belt light for seat and retain the load limiting properties of seat belts over time As discussed above, ultraviolet absorbers, HALS, and anti-oxidants can be injected into the polymer melt in the extrusion process. Incorporate directly into the spun fiber. These additives can also be dispersed in the dye bath and apply subsections. The same types of UV absorbers, HALS, and anti-oxidants described above for possible incorporation into the fiber can be used in the bath. Functional groups can be added to these compounds for obtain good dispersion in the dyebath Even though it is unnecessary in the present invention, the ink bath may also contain dye carrier to swell the fiber increase the permeability of the fiber, and facilitate diffusion of the dye and additive molecules towards the f ue The examples of the preferred disperse dyes l (? include anthraquinone dyes, azo dyes, trodi phenylamine dyes etma dyes, quino-stallone dyes and nattoquinone dyes. Dispersed dye materials commonly used are dyes with Red Color Index 72, Red 73, Red 82, Red 86 Ro or 91, Red 167, Red 177, Red 302 Orange 29, Orange 30 Orange 37 Orange 41 Orange 44 Yellow 42, Yellow 42 / Amapllo 86, Blue 27, Blue 60 Blue 64 Blue 73, Blue 77, Blue 79 Blue 87 / Blue 77 and Blue 165 Combinations of different C ink materials to the appropriate ratio can be used to provide the desired color shades for car seat cmturon Other Preferred dyes may include reactive dyes and pigments Examples of preferred dispersing / leveling agents include dioctylphenol ethoxylated lignosul fonate sodium other ammonium and nonionic surfactants and the mixture thereof Examples of preferred wetting agents include polyglycol ether, salt Sulfuric acid ester, polyglycol ether of alkyl alcohol and other surfactants Examples of preterm antimigrant agents include linear polymeric anhydride and other agents Examples of dye carriers include chlorinated benzene di-phenyl benzoic acid salicyclic acid, o-phenyl phenol , dimethylgel terephthalate and thalimides Tape with around 25% to appro extremely % wet pickup is then pulled into a pre-dryer set at a temperature between about 60 ° C to about 170 ° C and the water in the belt is removed The dye and additive particles are deposited on the surface of the fiber. The dry belt then moves into the thermosol chamber set at a temperature between about 120 ° C to about 180 ° C where the dispersed dyes, UV absorbers and other stabilizers are diffuse towards the fiber by heat The thermosol temperature, the tape tension and the residence time of thermosol are the important parameters to control the dye and / or the chemical diffusion and the uniformity of dyeing The residence time of the tape in the pre-dryer and the thermosol is preferably less than about 4 minutes The brake unit placed between the pre-dryer and the thermosol chambers and the trailing unit placed after the thermosol chamber are used to control the tension of the tape inside the thermosol to make in a special way the stress-fatigue curve of the seat belt by means of relaxation or lengthening The thermal tension of the belt The preferred tension is adjusted by the difference in the speeds of the belt inlet and outlet in the thermosol A brake unit can be used to control the feed rate The belt for dyed seat is then pulled to a cleaning pad to remove residual stains and / or chemicals from the surface of the belt The stained seat belt is pulled towards a steam boiler to fix the remaining unfixed ink material and moves towards washing boxes to eliminate the dyes and / or residual chemicals from the tape surface The dyed and washed tape is dried and a top finish is coated onto the tape to improve the abrasion properties and side stiffness of the load limiting seat belt The tape of limitation of finished charge has a force displacement profile illustrated in Figure 2, characterized by a) when the tape is subjected to at a knuckle point force on the scale of about 400 pounds (about 1 8 kilonewtons) to about 900 pounds (about 4 0 kilonewtons), the tape stretches to less than about a belt per belt (b) when subjecting the belt at more than the melting point strength less than or equal to about 1,400 pounds (approximately 6 2 ki lonewtons), the tape lengthens additionally to at least about ten percent, and c) by subjecting the tape to more than 1,400 pounds (approximately 6 2 kilonewtons), the module increases sharply and the belt is further lengthened until the belt breaks at a tensile strength of at least about 5,000 pounds (approximately 22 kilonewtons). Auto of this type of belt for cmturón for load limitation feel show that the force against the occupant is reduced and the damage criteria are minimized. The present tape is useful for seat belts, harnesses and parachute lines, shoulder harnesses, cargo handling, safety nets, trampolines, safety belts or harnesses for workers at high altitudes, military arrest tapes for ship braking aerial, ski tow lines, and in rope applications such as for yacht mooring or oil tower mooring TEST METHODS In the following Examples, the reduced specific viscosity was determined as follows The solution viscosity and solvent viscosity were measured and the specific viscosity was calculated by (solution viscosity-solvent viscosity) / (solvent viscosity) Reduced specific viscosity was calculated from the specific viscosity / solution concentration The intrinsic viscosity of polymer was determined by plotting the reduced specific viscosity of the solution of polymer against the concentration of solution in a mixed solvent of 60 parts of phenol and 40 parts of tetrachloroethane at 259C. The intercept was the intrinsic polymer viscosity. It is understood that IV is expressed in units of deciliters per gram or (dl / g) where even when said units are not indicated The thermal properties are measured by Calorirnetría-7 Differential Exploration Perkín Elrner using a chip sample size of polymer of approximately five milligrams, heating the sample to 2859C at a rate of 10sC / minute, retaining the sample at 2859C for two minutes and cooling the sample to 302C at the 10aC / minute rate. The maximum endothermic temperature in the heating scan was the The polymer melting temperature and the maximum exotherm temperature in the cooling scan was the crystallization temperature of a polymer. The glass transition temperature of a polymer was the second order thermal transition temperature during both heating and cooling scans. For the preferred thread made of block copolymer the Newtonian melt viscosity for the starting PET of the Example of the invention was calculated to be at least 7,000 poise at 280 ° C based on Andrze Ziabicki, "Effects of Molecular Weight on Melt Spinning and Mechanical Properties of High-Per declares Poly (ethylene Terephthalate) Fibers ", Text i le Res J 66 (11). 705-712 (1996) and A Dutta, "Identifymg Cptical Process Variables in Poly (ethylene Terephthala te j Melt Spinning", Textile Res J 54, 35-42 (1984) Newtonian melt viscosity means the melt viscosity at the zero shear stress The melt viscosity of block copolymer 3 ba or various spinning conditions was extrapolated with the melting rheology data obtained from the Kayeness Galaxy V capillary rheometer with capillary die L / D = 30 1 using shear rates ranging from 50 sec to 998 sec. Samples were dried at 160 ° C for 16 hours or vacuum before measurement 15 grams of sample were packed in the rheometer and allowed to melt to achieve temperature equilibrium for 6 hours. minutes before starting the melt viscosity measurements. Tests were done under different temperatures at constant shear rate through a scale of shear rates including 50 sec "1, 100 sec1 200 sec1 499 sec1 and 998 sec1 and times up to 20 minutes No corrections were made for final effects in a way that or IOS values with apparent melt viscosities The tension properties of the tape were measured on an Instron machine equipped with pneumatic rope and belt lugs that hold the belt to the length of 10 16 centimeters. The belt 5 was then pulled through the fatigue regime of 10 16 centimeters / minute under conventional conditions (23 + 29C, 50% + 5% of relative humidity) and the data was recorded by means of a load cell and extensiometer. From this data, the curves were obtained. effort-fatigue For light fastness, the cmturon samples for load limitation seat were cut and mounted on cards of 6 35 x 15 24 centimeters (2 5"x 6" i) and were placed in Xenon Arc WeatherOmeter Samples were exposed to various amounts of controlled radiation, specified in SAE J1885 (87) The reflectance of the control sample (unexposed) and the exposed sample were measured with spectrophotometer The color difference between the samples Control and exposed samples were calculated as Delta E or graduated with Gray Scale. Note that for Delta E readings, lower numbers were indicative of better dye light fastness, while with Gray scale, higher numbers were indicative of better dye light fastness For dynamic skid test, an average sized doll was restrained with seat belt tape and fully instrumented in a compact vehicle. The skid test was conducted at a speed of 74 12 kilometers (40 miles) per hour at an impulse rate of 28 g (which is the acceleration of gravity) The movement of the doll and the damage criterion recorded by sensors and high-speed cameras EXAMPLE 1 OF THE INVENTION PET block copolymer-polycaprolactone (85 weight ratio 15) was spun into the yarn having the characteristics of a stress curve in Figure 3. Each end of warp yarn consisted of one hundred filaments having 13 denier per filament 342 warp yarn ends were radiated and woven with a 650 denier weft yarn line having 13 denier per filament to seat belt under a 2x2 five-panel weave pattern to form a belt for raw seat belt With reference to Figure 4, the belt moved in the direction of arrow 10 The belt belt for raw seat was filled in a bath of disperse dye described above The dye was applied from a bath 12 of ink through a single immersion / single squeeze process and the ribbon was then passed through a pre-convection air dryer 14 set at a temperature of 1209C with a time 2 minutes residence time The pre-dried ribbon coated with dye material was then passed through a rubber grip braking roller 16 and into the convection thermosol oven 18 heated to 120 ° C to diffuse the dye into the ink The residence time of the belt in the thermosol furnace 18 was 2 4 minutes with the belt under no tension. The belt dyed therein was then neutralized with a cleaning bath of 2 grams / liter of sodium hydrosulfite at 27 ° C. was washed with detergent in two separate baths 22 ñ 96-1009C, rinsed with hot water at 96-100QC and then rinsed in a cold solution of 5 grams / liter of acetic acid (pH 4 5-5 0) The tape then it was coated with a top finish and dried by passing it over steam cans 24. The tape was taken at 26 for tension test The results are shown in Figure 5 (aj which indicates that the belt has a force displacement profile characterized by ( a) when the belt is subjected to a knuckle point strength of around 580 pounds (approximately 2 6 kilonewtons), the tape is stretched to less than about 2 5 percent, (b) by subjecting the tape to more than that knuckle point strength and less than or equal to about 1 400 pounds (approximately 6 2 kilonewtons), the tape is it lengthens additionally to at least about 15.5 percent, and (c) by subjecting the tape to more than 1,400 pounds (approximately 6 2 kilonewtons) the module increases sharply and the tape lengthens further until the tape breaks. at a tensile strength of at least about 5,073 pounds (approximately 22 6 kilonewtons) Figure 5 (a) does not show the tensile strength at break EXAMPLE 2 OF THE INVENTION In this example, a belt tape for PET-polycaprolactone seat was woven and fully drawn in accordance with the procedure set forth in Example 1 of the invention, except that the pre-drying and thermosol ovens were adjusted at a temperature of 1309C The tape was taken for stress test The results are shown in Figure 5 (b) which indicates that the tape has a force displacement profile characterized by (a) when the tape is subjected to a force of knuckle point of around 540 pounds (approximately 2 4 kilonewtons), the tape stretches to less than about two percent, (b) by subjecting the tape to more than the knuckle point strength and less or equal to about 1,400 pounds (approximately 6 2 kilonewtons), the belt lengthens additionally to at least about 16 percent, and (c) by submitting the belt to more than 1,400 pounds (approximately 6 2 kilonewtons), the module increases The tape is further lengthened until the tape breaks at a tensile strength of at least about 5 210 pounds (approximately 23 2 kilonewtons) Figure 5 (b) does not show the tensile strength at break EXAMPLE 3 OF THE INVENTION In this example, a cmtur belt for PET-polycaprolactone seating was completely woven and dressed according to the procedure set forth in Example 1 of the invention except that the pre-dryer and thermosol ovens were fitted to a 1409C temperature The tape was taken for tension and dynamics test The results are shown in Figure 5 (c) which indicates that the tape has a force displacement profile characterized by (a) when the tape is subjected to a force of knuckle point of about 580 pounds (approximately 2 6 kilonewtons) the ribbon stretches to less than about two percent, (b) when subjecting the tape to more than knuckle point strength and to less or equal 3 around 1,400 pounds (approximately 6 2 kilonewtons) the tape lengthens additional to at least about 13 percent, and (c) by subjecting the tape to more than 1,400 pounds (approximately 6 2 lonewtons), the module increases a sharply and the tape is further lengthened until the tape breaks at a tensile strength of at least about 5,100 pounds (approximately 22 7 kilonewtons) Figure 5 (c) does not show the tensile strength at break EXAMPLE 4 OF THE INVENTION In this example, a cmtur belt for PET-polycaprolactone seating was completely woven and dyed in accordance with the procedure set forth in Example 1 of the invention, except that the pre-dryer and thermosol ovens were adjusted to a temperature of 140aC and the tape in the thermosol oven was under a network stretch of approximately 3%. The tape was taken for stress test. The results are shown in Figure 5 (d) which indicates that the tape has a profile of force displacement characterized by (a) when the belt is subjected to a knuckle point force of approximately 560 pounds (about 2 5 kilonewtons), the belt is stretched to less than about two percent (b) when subjecting the belt at more than knuckle point strength and at less than or equal to approximately 1,400 pounds (about 6 2 kilonewtons), the belt lengthens further to at least about 12 percent and (c) when subjected When the tape is more than 1,400 pounds (about 6 2 kilonewtons), the modulus increases sharply and the tape is further lengthened until the tape breaks at a tensile strength of at least about 5,073 pounds (about 22 6 kilonewtons) Figure 5 (d) does not show the tensile strength at break EXAMPLE 5 OF THE INVENTION The PET-polycaprolactone yarn used in Example 1 of the invention was knitted to a sleeve and the PET-pol icaprolactone sleeve was filled into the dispersed ink bath described above. The dye was applied from from an ink bath through a single immersion process / unique extrusion and the sleeve was then mounted in a live underframe and moved into a pre-convection air dryer set at a temperature of 1309C with a residence time 3 minutes The sleeve previously dried, coated with dye material was then moved in another air convection oven heated to 150ec to diffuse the dye towards the PET-polycaprolactone filaments of the sleeve. The residence time of the sleeve in this oven was 3 minutes. The sleeve dyed therein was then neutralized in a cleaning bath of 2 grams / liter of sodium hydrosulfite at 27 ° C, subjected to steam and washed with detergent at 96-100 ° C, rinsed with hot water at 96-100 ° C, and then rinsed in a cold solution of 5 grams / liter of acetic acid (pH 4 5-5 0) The cuff was then dried and taken for light fastness studies Under the SAE J1885 test standards, GS Classification (225KJ) = 1 5 GS Classification (488KJ) = 1 EXAMPLE 6 OF THE INVENTION In this example, the yarn was spun from block copolymer of PET-pol icaprolactone (weight ratio of 85 15) mixed with 2- (2 '-h? Drox? -4' -methoxy feni) 1) -4, 6-d? phenyl-tpazine in one weight percent of PET-polycaprolactone copolymer A sleeve was knitted from the yarn and stained completely in accordance with the procedure set forth in Example 5 of the Invention The stained sleeve was taken for studies of light fastness Under the SAE test standards J1885, GS Classification (225KJ) = 3 5 GS Classification (488KJ) = 2 0 EXAMPLE 7 OF THE INVENTION In this example, the h was spun from block copolymer of PET-polycaprolactone (weight ratio of 85 15) mixed with 2-ethoxy? -2'-ethyloxyanilide to one weight percent of PET-poly icaprolactone copolymer A sleeve was knitted from the yarn and stained completely in accordance with the procedure set forth in Example 5 of the Invention The dyed sleeve was taken for light fastness studies Under the SAE J1885 test standards, GS Classification (225KJ) = 3 5, GS Classification (488KJ) = 1 5 EXAMPLE 8 OF THE INVENTION In this example, the yarn was spun from block copolymer of PET-pol icaprolactone (weight ratio of 85 15) mixed with propandioic acid ester of [(4-methox? Phenyl) -met filled] -, b? s (1, 2,2,6, 6-pentamet? l-4-pipepdimlo) to one percent by weight of PET-polycaprolactone copolymer A sleeve was knitted from the yarn and stained completely in accordance with the procedure set forth in Example 5 of the Invention The dyed sleeve was taken for light fastness studies Ba or the SAE J1885 test standards, GS Classification (225KJ) = 3 5, GS Classification (488 KJ) = 2 O EXAMPLE 9 OF THE INVENTION In this example, PET-pol icaprolactone copolymer yarn (weight ratio of 85 15) mixed with poly i [(6-mor fol? No-s-tpaz? N-2, 4 di i lo) [2, 2, 6, 6-tetrarnet? l-4-p? per? d? l)? m? no] -hexamet? leno [2,2,6,6-tetramet? l-4- p? pepd? l) imino)]] to one percent by weight of PET-polacaprolactone copolymer A yarn sleeve was woven and stained completely in accordance with the procedure set forth in Example 5 of the invention. The dyed sleeve was worn for light fastness studies Under the SAE J1885 test standards GS Classification (225KJ) = 3 0, GS Classification Í488KJ) = 2 0 EXAMPLE 10 OF THE INVENTION In this example, PET-polycaprolactone copolymer yarn (weight ratio of 85 15) mixed with 2- [4,6-B? S (2,4-dimethyl phenyl), 1, 3 was spun , 5-tpaz? N-2-? L] -5- (octyloxy) phenyl and 1,6-hexand? Amine, N, N-bis (2, 2, 6, 6-tetramet? L-4) -p? pepd? n? lo) -. Polymers with morpholm-2 4 6-tpchloro-l, 3, 5-tr? Az? Na at half percent by weight of PET-polycaprolactone copolymer, respectively A yarn sleeve was knitted and stained completely in accordance with the procedure set forth in Example 5 of the Invention The knitted sleeve was taken for light fastness studies Under the SAE J1885 test standards, GS Classification (225KJ) = 3 0, GS Classification (488KJ) = 2 0 EXAMPLE 11 OF THE INVENTION PET-polycaprolactone yarn using in Example 1 of the invention was knitted to a sleeve and the disperse dye liquor described above with the addition of 10 g / liter of dye carrier was filled into the sleeve of raw PET-polycaprolactone The dye was applied from an ink bath through a single / single dip process and the sleeve was then mounted in a frame and moved to a pre-convection air dryer set at a temperature of 130SC with a residence time of 3 minutes The sleeve coated with dye material, previously dried under tension then moved to another air convection oven heated to 150aC to diffuse the dye towards the filaments of PET-pol icaprolactone of the sleeve of residence of the cuff in the thermosol furnace was 3 minutes The cuff dyed in it was then neutralized in a clearing bath of 2 grams / liter of hydr sodium osulfite at 27aC, it was subjected to steam and washed with detergent at 96-100 ° C, rinsed with running water at 96-100 ° C and then rinsed in a cold solution of 5 grams / liter of acetic acid (pH 4 5-5 0) The cuff then it was dried and taken for light fastness studies Ba or SAE test standards J1885 GS Classification (225KJ) = 2 0, GS Classification (488KJ) = 1 0 EXAMPLE 12 OF THE INVENTION In this example, PET-polycaprolactone yarn used in Example 1 of the invention was woven into a sleeve The disperse dye bath described above with addition of 10 g / liter of ink carrier and 60 g / liter of Cibafast P was filled into the raw PET-poly icaprolactone sleeve. The sleeve was fully drawn in accordance with the procedure set forth in Example 8 of the Invention. The dyed sleeve was taken for light fastness studies Ba or the test standards of SAE J1885 Classification GS Í225KJ) = 4, Classification GS (488KJ) = 2 5 EXAMPLE 13 OF THE INVENTION In the sliding test the average size doll was restrained with seatbelt tape in Example 3 of the Invention and fully instrumented in a compact vehicle The sliding test was conducted at a speed of 74 (40 miles) kilometers per hour and impulse rate of 28 g (which is the acceleration of gravity) The movement of the doll and the damage criteria were recorded by sensors and high-speed cameras Figure 6 illustrates the operation (with load as a time function) of the present seat belt for load limitation in the torso position in a vehicle collision Table 1 compares the function of load limitation and belt belts for PET seat and shows the reduction in force against the seat. occupant and improvement of damage criteria As those skilled in the art know, in File 74-14 49 CFR Parts 571,572, and 585, imputation regime lso means acceleration expressed as a multiple of g (which is the acceleration of gravity) HIC means the Head Damage Criterion Chest mm means the deviation of the chest of the occupant of the vehicle TABLE 1 No of Pulse Lap Torso HIC Chest Chest Test (kN ) (kN) (g) (mm) Example of the 28g 6 6 436 45 36 3 Invention 74 12 km / h Comparative 40 5g 8 5 9 7 974 59 9 64 66 70 km / h TABLE 1 (Continued) lf) No d Pelvis Femur kN Test (g) Use of the 40 0.9 / -1.4 L Invention 1 2 / -0 2 R 1 0

Claims (14)

1 - . 1 - A belt having a force displacement profile characterized by (a) when the belt is subjected to a knuckle point force on the scale of about 400 pounds (approximately 1 8 kilonewtons) to about 900 pounds (approximately 4 0 kilonewtons), the tape is stretched to less than about one-fifth percent, (b) by subjecting the tape to more than the knuckle point strength and less than or equal to approximately 1 400 pounds (about 6 2 ki lonewtons ), the tape is further lengthened to at least approximately ten percent, and (c) by subjecting the tape to more than 1,400 pounds (approximately 6 2 kilonewtons), the module increases sharply and the tape lengthens further until the tape breaks at a tensile strength of at least about 5,000 pounds (approximately 22 kilonewtons)

2 - Conformance tape with claim 1 wherein in part (a), the tape is stretched to less than about three percent

3 - The tape according to claim 1, wherein in part (b), the tape is lengthened to at least about 15 percent

4 - The tape according to claim 1, wherein the citation is made of yarn having a force displacement profile characterized by a) when the yarn is subjected to an initial stress barrier of about from 0 8 grams / denier to less than or equal to approximately 1 2 grams / denier, the yarn is stretched to less than 5 percent and has an initial modulus on the scale of about 30 grams / denier to about 80 grams / denier , b) to the insert the yarn over the initial stress barrier and less than or equal to about 1 5 grams / denier, the yarn is further lengthened to at least about 8 percent, and c) when submitting the yarn to more than 1 gram / The modulus increases sharply and the yarn is further lengthened until the yarn breaks at a tensile strength of at least 6 grams / denier, wherein the yarn comprises a multiplicity of fibers and all fibers have substantially the same force displacement profile

5 - The tape according to claim 1 wherein the tape is dyed

6 - The tape according to claim 1, wherein the tape is used as a seat safety belt and comprises at least 300 strands of warp yarn and at least one weft yarn

7 - The tape according to claim 6, wherein the warp yarn has a denier of about 800 to about 2,000 and a yarn clenier. fiber from about 2 to about 30

8 - The tape according to claim 6, wherein the weft yarn has a denier of about 200 to about 2,000 and a fiber denier of about 1 to about 1 000

9 - The tape according to claim 6, wherein the weft yarn is made of the same polymer as the warp yarn

10 - The tape according to claim 1 wherein the tape is comprised of yarn made from block copolymer of aromatic polyester and lactone monomer and the block copolymer has a glass transition temperature in the range of about -20aC to about +60 C.

11 - The tape according to claim 10. wherein the aromatic polyester is polyethylene terephthalate.

12 - The tape according to claim 10, wherein the monomer is e-caprolactone

13. - The tape according to claim 10. wherein the block copolymer comprises ultraviolet absorber, hindered amine light stabilizer, antioxidant, pigment and other additives.

14 - The tape according to claim 13, wherein the ultraviolet absorber is selected from benzophenones. benzotriazoles, tpazmas and oxanilides. 15. The tape according to claim 13, wherein the antioxidant is selected from hindered phenolics, hindered benzoates, hindered amines and phosphites / phosphonines 16. The tape according to claim 13, wherein at least one of the ultraviolet absorbers is employed in an amount of from about 0.1 to about 2.0 weight percent and / or at least one of the hindered amine light stabilizers is employed in an amount of about O about 2.0 weight percent and / or at least one of the antioxidants is employed in an amount of about 0.1 to about 2.0 percent by weight, based on the total weight of the block copolymer 17 - A process for making charge limiting tape, comprising the step of heating the tape to a temperature of about 120 ° C to about 180 ° C under sufficient tension or shrinkage in order to achieve the treated tape having a force displacement profile characterized by i) when the tape is subjected to a knuckle point force on the scale of 400 lb. (approximately 1 8 kilonewtons) to around 900 pounds (approximately 4 0 kilonewtons), the tape stretches to less than about five percent, n) when subjecting the tape to more than knuckle point strength and less or equal to about 1,400 pounds (approximately 6 2 kilonewtons) the tape lengthens further by at least about ten percent, and m) by subjecting the tape to more than 1,400 pounds (approximately 6 2 kilonewtons), the module increases sharply and the The tape is further lengthened until the tape breaks at a tensile strength of at least about 5,000 pounds (approximately 22 kilonewtons) 18 - The process according to claim 17, further comprising the step of before the heat treatment of the tape, knitting a yarn having a force displacement profile characterized by: a) when the yarn is subjected to an initial stress barrier of about 0.8 gram s / denier unless or equal to approximately 1.2 grams / denier, the yarn is stretched to less than 5 percent and has an initial modulus on the scale of about 30 grams / denier to about 80 grams / denier; b) by subjecting the yarn to more than the initial stress barrier and unless or equal to about 1 5 grams / denier, the yarn is further lengthened to at least about 8 percent; and c) by subjecting the yarn to more than 1.5 grams / denier, the modulus increases sharply and the yarn is further lengthened until the yarn breaks at a tensile strength of at least 6 grams / denier, where the yarn yarn comprises a multiplicity of fibers and all fibers have substantially the same force displacement profile. 19. The process according to claim 17, further comprising the step of before the thermal treatment of the tape, washing the tape and / or filling the tape in a bath 20- The process according to claim 19, in where the bath comprises dye 21 - The process according to claim 20, wherein the dye is a disperse dye 22 - The process according to claim 19 wherein the bath can contain an ink carrier 23 - The compliance process with claim 19 wherein the bath comprises an ultraviolet and / or antioxidant absorber 24 - The process according to claim 17, further comprising the step of after filling and before the heat treatment drying the filled tape on a scale of temperature from about 60SC to about 170EC 25 - The process according to claim 17, further comprising the step after the treatment Thermal tape, coat the tape with a superior finish