CN113089161A - Polyamide 56 and polyester PET composite impregnated cord fabric and preparation method thereof - Google Patents
Polyamide 56 and polyester PET composite impregnated cord fabric and preparation method thereof Download PDFInfo
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- CN113089161A CN113089161A CN202110354564.5A CN202110354564A CN113089161A CN 113089161 A CN113089161 A CN 113089161A CN 202110354564 A CN202110354564 A CN 202110354564A CN 113089161 A CN113089161 A CN 113089161A
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/04—Blended or other yarns or threads containing components made from different materials
- D02G3/045—Blended or other yarns or threads containing components made from different materials all components being made from artificial or synthetic material
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- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0006—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using woven fabrics
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- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
- D06N3/0034—Polyamide fibres
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- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
- D06N3/0036—Polyester fibres
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- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
- D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
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- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06N3/10—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds with styrene-butadiene copolymerisation products or other synthetic rubbers or elastomers except polyurethanes
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- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
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- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
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- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/26—Vehicles, transportation
- D06N2211/263—Cars
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- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
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- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
Abstract
The invention provides a composite impregnated cord fabric of polyamide 56 and polyester PET, which comprises a composite white blank cord fabric and an impregnated adhesive coating arranged on the composite white blank cord fabric, wherein the composite white blank cord fabric is formed by interweaving warp composite cords and wefts, the warp composite cords are formed by holding polyester PET yarns and polyamide 56 yarns together in an unequal length stranding twisting mode, and the twist is 330 plus 490 twists/m; the weft comprises at least one of nylon 66 and PET, and the density of the weft fibers is 22-40 tex. The composite impregnated cord fabric of the polyamide 56 and the polyester PET has high strength and good fatigue resistance, increases the durability of the tire, can reduce the rolling resistance of the tire, and improves or eliminates the flat spot phenomenon of the tire.
Description
Technical Field
The invention relates to the technical field of impregnated cord fabrics for tire framework materials, in particular to a polyamide 56 and polyester PET composite impregnated cord fabric and a preparation method thereof.
Background
Biobased materials and the like are brought together into the advanced research field of new materials. The national science and technology innovation plan also clearly provides agricultural biological products such as creation of bio-based materials and the like and realizes industrialization. It is recognized that bio-based polyamide 56 materials have potential advantages for carbon neutralization. Compared with the traditional polyamide 66, polyamide 6 and other fibers, the bio-based polyamide 56 fiber has excellent performance, the polyamide 56 fiber does not completely depend on petroleum raw materials, and has the advantages of environmental protection and environmental friendliness, and meanwhile, the cost advantage is realized on the raw materials.
The gum dipping cord fabric is widely applied to the fields of tires, conveyor belts, rubber tubes and the like as a framework reinforcing material of rubber products, currently, more synthetic materials comprising nylon fibers, polyester fibers, rayon fibers and the like are used in the field of tires, each material has unique characteristics, and people apply the materials to different parts of the tires according to the characteristics.
In the process of high-speed running of the radial tire, a belt layer generates centrifugal force along with the rotation of the tire to cause separation between the belt layer and a carcass layer, a cap ply is added at the outer edge of the belt layer for restraining the deformation of the belt layer, when the tire is subjected to expansion deformation in the circumferential direction, the deformation of the tire is restrained by the cap ply, and the cap ply material requires that the cord fabric has higher modulus and higher heat shrinkage force at high temperature, so the cord fabric used by the cap ply mainly comprises nylon 66 cord fabric or composite cord fabric of nylon 66 and aramid.
Dupont, Asian industry, Shandong Bolat, et al, invented a composite cord of nylon 66 and aramid fibers, which were made by mixing aramid fibers and nylon 66 fibers, mainly considering that aramid fibers have characteristics of corrosion resistance, high modulus, and high specific strength.
These inventions, such as the use of aramid fibers, have made these studies mainly applicable in the field of aircraft tires and high-performance tires due to the relative difficulty of aromatic polyamides in tire molding due to high modulus, and low fatigue resistance and durability due to low elongation; meanwhile, the manufacturing price of the tire is increased by the aramid fiber and nylon 66 mixed cord, the market application is limited, the polyester PET cord is singly used, the bending fatigue resistance is poor, the heat adhesion with rubber is poor, and the application is limited, the processing and manufacturing related to the researches are that the polyester PET cord is required to be subjected to multiple pre-twisting manufacturing, the flow control is increased, the multiple twisting manufacturing is carried out, the final comprehensive performance of fiber abrasion is reduced, or after two kinds of fibers with different performances are mixed, the tensile performance cannot be synchronized due to large modulus difference, when the cord is subjected to repeated tensile compression, the fatigue resistance of the cord is reduced due to the fact that the cord with higher modulus is concentrated by stress, and the like, and the purposes of performance complementation and performance improvement of the mixed cord cannot be achieved finally.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a composite impregnated cord fabric of polyamide 56 and polyester PET and a preparation method thereof, wherein the bio-based polyamide 56 and the polyester PET are combined, and the polyester PET is pre-twisted (or not twisted), so that the length ratio of the polyester PET in a twisted wire is reasonably controlled, the polyester PET with higher modulus and the polyamide 56 with lower modulus are subjected to synergistic action, and the composite impregnated cord fabric with excellent performance is obtained and can be used in the tire industry. The composite impregnated cord fabric has high strength and good fatigue resistance, and the durability of the tire is improved. Meanwhile, the composite impregnated cord fabric can reduce the rolling resistance of the tire and reduce or avoid the flat spot phenomenon of the tire due to the fact that the composite impregnated cord fabric contains the polyester PET in a certain proportion.
The technical scheme adopted by the invention is as follows:
a composite impregnated cord fabric of polyamide 56 and polyester PET (polyethylene terephthalate), wherein the composite impregnated cord fabric comprises a composite white blank cord fabric and an impregnated adhesive coating arranged on the composite white blank cord fabric, the composite white blank cord fabric is formed by interweaving warp composite cords and wefts, the warp composite cords are held together by polyester PET (polyethylene terephthalate) yarns and polyamide 56 yarns in an unequal length plying twisting mode, and the twist degree is 330-; the weft comprises at least one of nylon 66 and PET, and the density of the weft fibers is 22-40 tex.
Preferably, the composite dipped cord fabric of the polyamide 56 and the polyester PET is characterized in that the linear density ratio of the polyester PET yarns to the polyamide 56 yarns is 1.27/1-1.17/1; the length ratio of the polyester PET yarns to the polyamide 56 yarns is 1.01/1-1.05/1, and the warp composite cords are 0.53-0.71mm in diameter.
Preferably, the composite impregnated cord fabric of polyamide 56 and polyester PET is characterized in that the polyester PET yarn is pre-twisted polyester PET industrial filament, the pre-twisting degree is 15-150 twists/m, and the pre-twisted polyester PET yarn has a twisting direction S or Z; polyamide 56 yarns are polyamide 56 technical filaments that have not been pre-twisted; the polyester PET yarns and the polyamide 56 yarns are twisted in a stranding mode, and the direction of the stranding twisting is opposite to the pre-twisting direction of the polyester PET yarns.
Preferably, the composite dipped cord fabric of polyamide 56 and polyester PET is obtained by pre-twisting polyester PET industrial filaments; the polyamide 56 yarn was a polyamide 56 technical filament that was not pre-twisted.
Preferably, the polyamide 56 and polyester PET composite impregnated cord fabric is characterized in that the polyamide 56 industrial filaments have the linear density of 940-1500dtex and the strength of more than 8.0 cN/dtex; the polyester PET industrial filament is a high-modulus low-shrinkage HMLS polyester industrial filament, the linear density is 1100-1800dtex, the strength is more than 7.4cN/dtex, and the dimensional stability is less than 9.0 percent; the linear density of the composite dipped cord is 2200-3800dtex, the strength of the warp composite cord is 6.0-8.0 cN/dtex, the breaking elongation of the warp composite cord is 14-23%, and the 3% constant tensile force is 65-128 mN/tex.
Preferably, the dipped cord fabric of the composite of the polyamide 56 and the polyester PET is a dipped cord fabric, wherein the dipped adhesive coating comprises a first adhesive layer and a second adhesive layer, the material of the first adhesive layer is a reaction product of blocked isocyanate and epoxy resin, and the material of the second adhesive layer is a reaction product of resorcinol-formaldehyde-latex.
Preferably, the composite dipped cord fabric of polyamide 56 and polyester PET is obtained by dipping, wherein the dipped adhesive coating is a reaction product of blocked isocyanate-epoxy resin-rubber latex.
A preparation method of polyamide 56 and polyester PET composite impregnated cord fabric comprises the following steps:
(1) stranding and twisting: plying and twisting untwisted polyamide 56 yarns and polyester PET yarns on a direct twisting machine to manufacture the composite white blank cord, wherein the twisting speed is controlled to 7000 and 9000 revolutions per minute, the lengths of two yarns in the twisting process are controlled to be different, and after untwisting, the length ratio of the polyester PET yarns to the polyamide 56 industrial filaments is 1.01/1-1.05/1;
(2) weaving, namely weaving the composite white blank cord into the composite white blank cord fabric by using an air jet loom in a reed-by-reed mode;
(3) gum dipping: and (3) treating the composite white blank cord fabric by using a dipping glue solution in a two-bath dipping mode to obtain the composite dipped cord fabric.
Preferably, the preparation method of the composite dipped cord fabric of the polyamide 56 and the polyester PET is characterized in that the polyester PET yarns are untwisted protofilaments or pre-twisted yarns, preferably pre-twisted yarns, the twist degree of the pre-twisted yarns is 15-150 twists/meter, the twist direction is S twist direction or Z twist direction, the untwisted polyamide 56 yarns and the pre-twisted polyester PET yarns are twisted and twisted on a straight twisting machine to prepare the composite white blank cord fabric, and the twist direction is opposite to the direction of the pre-twisted polyester PET yarns.
Preferably, the preparation method of the composite dipped cord fabric of polyamide 56 and polyester PET is characterized in that the dipping glue solution is a water dispersion containing blocked isocyanate and epoxy resin in one bath, and resorcinol-formaldehyde-latex (RFL) in a second bath; or both the first bath and the second bath comprise a blocked isocyanate-epoxy-rubber latex aqueous dispersion; the impregnation process comprises the following steps: the method comprises the following steps of one-bath impregnation, primary drying, hot stretching, two-bath impregnation, secondary drying and hot setting, wherein the primary drying temperature and the secondary drying temperature are both 100-170 ℃, the hot stretching temperature and the hot setting temperature are 210-225 ℃, and the hot stretching and hot setting treatment time is 4-12 min.
The invention has the advantages that:
(1) the composite impregnated cord fabric of the polyamide 56 and the polyester PET has high strength and good fatigue resistance, increases the durability of the tire, can reduce the rolling resistance of the tire, and improves or eliminates the flat spot phenomenon of the tire.
(2) According to the composite impregnated cord fabric of the polyamide 56 and the polyester PET, only the polyester PET with higher modulus is twisted in advance or not twisted, and the polyamide 56 fiber is not twisted, so that the twisting process flow is reduced, the production efficiency is improved, and the manufacturing cost is reduced; in addition, the polyester PET pre-twisted wire or the untwisted wire and the polyamide 56 fiber are twisted in unequal lengths, so that the polyester PET with higher modulus slightly wraps around the polyamide 56 fiber, and stress can be uniformly dispersed to the polyester PET and the polyamide 56 fiber in the repeated stretching and compression process of the cord, thereby improving the fatigue resistance of the composite cord; the polyester PET pre-twisted wire has the twist of 15-150 twists/m and polyamide 56 fiber is twisted in different lengths, so that the obtained cord has better fatigue resistance.
(3) The polyamide 56 and polyester PET composite impregnated cord fabric provided by the invention has the advantages that the linear density-to-weight ratio of two fibers is properly controlled, the performance offset of the two fibers caused by difference can be avoided, a better synergistic effect can be exerted, in a tensile stress strain curve, the composite impregnated cord fabric shows the low modulus characteristic of the polyamide 56 at the initial deformation stage, the processing and the manufacturing are easy, and the high modulus and the high rigidity of the polyester PET are realized at the middle and later deformation stages in a tensile stress strain curve, so that the deformation of a tire can be better limited when the tire runs at a high speed.
Detailed Description
The present invention will be further described with reference to the following specific examples.
In this patent, the linear density ratio of the polyester PET yarn to the polyamide 56 yarn is 1.27/1 to 1.17/1, and it is known that the linear density is defined as the weight of a certain length, and the linear density ratio is also the weight ratio, and when the fineness of the polyester PET yarn is too high, the fatigue resistance of the composite cord is deteriorated, and the adhesion to rubber is deteriorated. When the content of the polyester PET is too low, the composite cord is caused to more embody the low modulus property of the polyamide 56 without exerting high modulus rigidity. And too low or too high a polyester PET content may result in the physical properties of the cord not being synergistically matched with each other, resulting in poor properties of the final composite cord.
According to the requirements of the invention, the pre-twisting degree of the polyester PET yarn can be 15-150 twists/meter, so that the production efficiency of the structure can be properly increased, the pre-twisting can not be carried out, the polyester PET needs to be pre-twisted properly for increasing the fatigue resistance of the composite cord, the pre-twisting degree is not too large, if the pre-twisting degree is too large, the strong loss of the polyester PET pre-twisted yarn is large, and simultaneously, when the composite cord is stressed, the two materials can not be deformed cooperatively. The twist control 330-.
According to the requirements of the invention, after the warp composite cord is untwisted, the length ratio of the polyester PET yarns to the polyamide 56 yarns is 1.01/1-1.05/1, and after the untwisting, when the polyester PET yarns are equal to or less than the length of the polyamide 56 yarns, the polyester PET with higher modulus is firstly stressed when the composite cord is stressed, which is not beneficial to the low modulus of the polyamide 56 during the cord molding; after untwisting, when the length of the polyester PET yarn is much greater than that of the polyamide 56 yarn, the polyester PET yarn and the polyamide 56 yarn have too large difference, and the cord thread has too large difference in the reciprocating stretching and compressing process of the tire, which is not beneficial to the strength and fatigue resistance of the composite cord thread.
According to the requirements of the invention, the warp composite cord and the weft are woven into white blank cord fabric according to a plain structure, and the white blank cord fabric is treated by dipping heat to become composite dipped cord fabric; the glue solution used for the dipping treatment must contain rubber latex which can be natural latex, or/and butadiene-pyridine latex, or/and styrene-butadiene latex, or the combination of the above; generally, the selected dipping glue solution is a known RFL (resorcinol-formaldehyde-latex) bonding system, the dipping heat treatment process comprises one-bath dipping, drying, hot stretching, two-bath dipping, drying and heat setting processes, in order to avoid damage of high-temperature or long-time heat treatment on the physical properties of the fiber fabric, the drying temperature needs to be controlled to be 100-; too high a temperature and too long a treatment time will result in loss of physical properties of the fabric and sometimes in poor adhesion to rubber.
Example 1
Twisting, weaving and gumming high-modulus low-shrinkage polyester industrial yarns HMLS-PET with the specification of 1100dtex and high-strength polyamide 56 industrial precursor yarns with the specification of 940dtex, and specifically comprises the following steps:
(1) stranding and twisting: twisting the two protofilaments by using an ALLMA CC3 model direct twisting machine, and setting the process parameters in the table 1 for controlling the unequal length of the untwisted composite twisted yarn and the twist degree;
(2) weaving: weaving the twisted threads by using a PICANOL air jet loom, wherein the weaving reeding adopts a reed-line mode, and the twisted thread bobbin creel controls the tension uniformity of the cloth surface by using a wire inserting spindle tension control device to weave white blank cord fabric;
(3) gum dipping: performing double-bath dipping heat treatment on the white blank cord fabric by using RFL (resorcinol-formaldehyde-latex) dipping glue solution, wherein the dipping heat treatment comprises a drying area, a hot stretching area and a heat setting area; setting by referring to the dipping process parameters in the table 1, and obtaining the composite dipped cord fabric after dipping.
One bath uses a mixed water dispersion of blocked isocyanate and epoxy resin; the two baths used conventional RFL (resorcinol-formaldehyde-latex) solutions.
Examples 2 to 6
The raw materials are high modulus low shrinkage polyester industrial filament HMLS-PET with 1100dtex specification and high strength polyamide 56 industrial protofilament with 940dtex specification, the processing steps are pre-twisting, ply twisting, weaving and gum dipping, and the method specifically comprises the following steps:
(1) stranding and twisting: firstly, pre-twisting HMLS-PET industrial yarns by using an Ooruikang Sula two-for-one twister to manufacture pre-twisted yarns, wherein the twisting speed is 7000 r/min;
the pre-twisted yarns of HMLS-PET were then ply-twisted with polyamide 56 technical filaments using an ALLMA CC3 model direct twister at a twisting speed of 7000 rpm.
The control of the untwisting unequal length of the composite twisted wire, the twist degree and the like are set according to the process parameters in the table 1;
(2) weaving: weaving the twisted threads by using a PICANOL air jet loom, wherein the weaving reeding adopts a reed-line mode, and the twisted thread bobbin creel controls the tension uniformity of the cloth surface by using a wire inserting spindle tension control device to weave white blank cord fabric;
(3) gum dipping: performing double-bath dipping heat treatment on the white blank cord fabric by using RFL (resorcinol-formaldehyde-latex) dipping glue solution, wherein the dipping heat treatment comprises a drying area, a hot stretching area and a heat setting area; setting by referring to the dipping process parameters in the table 1, and obtaining the composite dipped cord fabric after dipping.
One bath uses a mixed water dispersion of blocked isocyanate and epoxy resin; the two baths used conventional RFL (resorcinol-formaldehyde-latex) solutions.
Example 7
Twisting, weaving and gumming high-modulus low-shrinkage polyester industrial yarns HMLS-PET with the specification of 1670dtex and high-strength polyamide 56 industrial raw yarns with the specification of 1400dtex, specifically comprising the following steps:
(1) stranding and twisting: twisting the two protofilaments by using an ALLMA CC3 model direct twisting machine, and setting the process parameters in the table 3 for controlling the unequal length of the untwisted composite twisted yarn and the twist degree;
(2) weaving: weaving the twisted threads by using a PICANOL air jet loom, wherein the weaving reeding adopts a reed-line mode, and the twisted thread bobbin creel controls the tension uniformity of the cloth surface by using a wire inserting spindle tension control device to weave white blank cord fabric;
(3) gum dipping: performing double-bath process dipping heat treatment on the white blank cord fabric by using a dipping glue solution, wherein the dipping heat treatment comprises a drying area, a hot stretching area and a heat setting area; setting by referring to the dipping process parameters in the table 1, and obtaining the composite dipped cord fabric after dipping.
One bath uses a mixed aqueous dispersion of blocked isocyanate, epoxy resin and rubber latex; the two-bath uses a mixed aqueous dispersion of blocked isocyanate, epoxy resin, rubber latex.
Example 8
The raw materials are high-modulus low-shrinkage polyester industrial yarns HMLS-PET with the specification of 1670dtex and high-strength polyamide 56 industrial raw yarns with the specification of 1400 dtex. The processing steps comprise pre-twisting, stranding and twisting, weaving and gum dipping, and specifically comprise the following steps:
(1) twisting: firstly, using an Ooruikang Sula two-for-one twister to pre-twist HMLS-PET industrial yarns to manufacture pre-twisted yarns, wherein the twisting speed is 7000 r/min.
The pre-twisted yarns of HMLS-PET were then ply-twisted with polyamide 56 technical filaments using an ALLMA CC3 model direct twister at a twisting speed of 7000 rpm.
The control of the untwisting unequal length of the composite twisted wire, the twist degree and the like are set according to the process parameters in the table 3;
(2) weaving: weaving the twisted threads by using a PICANOL air jet loom, wherein the weaving reeding adopts a reed-line mode, and the twisted thread bobbin creel controls the tension uniformity of the cloth surface by using a wire inserting spindle tension control device to weave white blank cord fabric;
(3) gum dipping: performing double-bath process dipping heat treatment on the white blank cord fabric by using a dipping glue solution, wherein the dipping heat treatment comprises a drying area, a hot stretching area and a heat setting area; setting by referring to the dipping process parameters in the table 1, and obtaining the composite dipped cord fabric after dipping.
One bath uses a mixed aqueous dispersion of blocked isocyanate, epoxy resin and rubber latex; the two-bath uses a mixed aqueous dispersion of blocked isocyanate, epoxy resin, rubber latex.
Comparative example 1
Twisting, weaving and gumming high-modulus low-shrinkage polyester industrial yarns HMLS-PET with the specification of 1100dtex and high-strength polyamide 56 industrial precursor yarns with the specification of 940dtex, and specifically comprises the following steps:
(1) twisting: twisting the two protofilaments by using an ALLMA CC3 model direct twisting machine, and setting the process parameters in the table 1 for controlling the unequal length of the untwisted composite twisted yarn and the twist degree;
(2) weaving: weaving the twisted threads by using a PICANOL air jet loom, wherein the weaving reeding adopts a reed-line mode, and the twisted thread bobbin creel controls the tension uniformity of the cloth surface by using a wire inserting spindle tension control device to weave white blank cord fabric;
(3) gum dipping: performing double-bath dipping heat treatment on the white blank cord fabric by using RFL (resorcinol-formaldehyde-latex) dipping glue solution, wherein the dipping heat treatment comprises a drying area, a hot stretching area and a heat setting area; setting by referring to the dipping process parameters in the table 1, and obtaining the composite dipped cord fabric after dipping.
One bath uses a mixed water dispersion of blocked isocyanate and epoxy resin; the two baths used conventional RFL (resorcinol-formaldehyde-latex) solutions.
Comparative examples 2 to 5
The raw materials are high-modulus low-shrinkage polyester industrial yarns HMLS-PET with the specification of 1100dtex and high-strength polyamide 56 industrial yarns with the specification of 940 dtex. The processing steps comprise pre-twisting, stranding and twisting, weaving and gum dipping, and specifically comprise the following steps:
(1) twisting: firstly, using an Ooruikang Sula two-for-one twister to pre-twist HMLS-PET industrial yarns to manufacture pre-twisted yarns, wherein the twisting speed is 7000 r/min.
The pre-twisted yarns of HMLS-PET were then ply-twisted with polyamide 56 technical filaments using an ALLMA CC3 model direct twister at a twisting speed of 7000 rpm.
The control of the untwisting unequal length of the composite twisted wire, the twist degree and the like are set according to the process parameters in the table 1;
(2) weaving: weaving the twisted threads by using a PICANOL air jet loom, wherein the weaving reeding adopts a reed-line mode, and the twisted thread bobbin creel controls the tension uniformity of the cloth surface by using a wire inserting spindle tension control device to weave white blank cord fabric;
(3) gum dipping: performing double-bath dipping heat treatment on the white blank cord fabric by using RFL (resorcinol-formaldehyde-latex) dipping glue solution, wherein the dipping heat treatment comprises a drying area, a hot stretching area and a heat setting area; setting by referring to the dipping process parameters in the table 1, and obtaining the composite dipped cord fabric after dipping.
One bath uses a mixed water dispersion of blocked isocyanate and epoxy resin; the two baths used conventional RFL (resorcinol-formaldehyde-latex) solutions.
Comparative example 6
Twisting, weaving and gumming high-modulus low-shrinkage polyester industrial yarns HMLS-PET with the specification of 1670dtex and high-strength polyamide 56 industrial raw yarns with the specification of 1400dtex, specifically comprising the following steps:
(1) twisting: twisting the two protofilaments by using an ALLMA CC3 model direct twisting machine, and setting the process parameters in the table 3 for controlling the unequal length of the untwisted composite twisted yarn and the twist degree;
(2) weaving: weaving the twisted threads by using a PICANOL air jet loom, wherein the weaving reeding adopts a reed-line mode, and the twisted thread bobbin creel controls the tension uniformity of the cloth surface by using a wire inserting spindle tension control device to weave white blank cord fabric;
(3) gum dipping: performing double-bath process dipping heat treatment on the white blank cord fabric by using a dipping glue solution, wherein the dipping heat treatment comprises a drying area, a hot stretching area and a heat setting area; setting by referring to the dipping process parameters in the table 1, and obtaining the composite dipped cord fabric after dipping.
One bath uses a mixed aqueous dispersion of blocked isocyanate, epoxy resin and rubber latex; the two-bath uses a mixed aqueous dispersion of blocked isocyanate, epoxy resin, rubber latex.
Comparative example 7
The raw materials are high-modulus low-shrinkage polyester industrial yarns HMLS-PET with the specification of 1670dtex and high-strength polyamide 56 industrial raw yarns with the specification of 1400 dtex. The processing steps comprise pre-twisting, stranding and twisting, weaving and gum dipping, and specifically comprise the following steps:
(1) twisting: firstly, using an Ooruikang Sula two-for-one twister to pre-twist HMLS-PET industrial yarns to manufacture pre-twisted yarns, wherein the twisting speed is 7000 r/min.
The pre-twisted yarns of HMLS-PET were then ply-twisted with polyamide 56 technical filaments using an ALLMA CC3 model direct twister at a twisting speed of 7000 rpm.
The control of the untwisting unequal length of the composite twisted wire, the twist degree and the like are set according to the process parameters in the table 3;
(2) weaving: weaving the twisted threads by using a PICANOL air jet loom, wherein the weaving reeding adopts a reed-line mode, and the twisted thread bobbin creel controls the tension uniformity of the cloth surface by using a wire inserting spindle tension control device to weave white blank cord fabric;
(3) gum dipping: performing double-bath process dipping heat treatment on the white blank cord fabric by using a dipping glue solution, wherein the dipping heat treatment comprises a drying area, a hot stretching area and a heat setting area; setting by referring to the dipping process parameters in the table 1, and obtaining the composite dipped cord fabric after dipping.
One bath uses a mixed aqueous dispersion of blocked isocyanate, epoxy resin and rubber latex; the two-bath uses a mixed aqueous dispersion of blocked isocyanate, epoxy resin, rubber latex.
And (3) performance testing: the dipped fabrics manufactured in examples 1 to 8 and comparative examples 1 to 7 were tested according to the following test methods:
1. the fiber density test method comprises the following steps: measured according to the method of GB/T14343;
2. the test method comprises the following steps of (1) testing the strength of the cord, the breaking elongation of the cord and the stress at definite elongation LASE 3%, wherein the test method comprises the following steps: measured according to the method GB/T9101. Wherein LASE 3% is the stress value corresponding to 3% strain of the cord;
3. twist testing method: reference is made to the GB/T14345 method; the method for calculating the unequal length twisting length ratio is to add 1m long twisted wire and then untwist the twisted wire, wherein the length ratio of the two untwisted wires is obtained.
4. Cord bending fatigue method: according to the rule given by GB/T30315, the cord strength and the strength retention rate after fatigue are obtained by measuring 10 ten thousand times according to the reciprocating frequency of 100 times/minute;
the process parameters of examples 1-6 and comparative examples 1-5 are shown in Table 1:
TABLE 1 Process parameters of a method for manufacturing a composite impregnated cord fabric of polyamide 56 and polyester PET
Examples 1-6, comparative examples 1-5, the properties of the resulting product are given in Table 2 below:
TABLE 2 characteristics of a polyamide 56 and polyester PET composite dipped cord fabric product
The process parameters of examples 7 to 8 and comparative examples 6 to 7 are shown in Table 3
TABLE 3 Process parameters of a method for manufacturing polyamide 56 and polyester PET composite impregnated cord fabric
Examples 7-8, comparative examples 6-7, the properties of the resulting product are given in Table 4 below:
TABLE 4 characteristics of a polyamide 56 and polyester PET composite dipped cord fabric product
The composite impregnated cord fabric manufactured by the invention has high strength and good fatigue resistance, increases the durability of the tire, can reduce the rolling resistance of the tire, and improves or eliminates the flat spot phenomenon of the tire.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. The composite impregnated cord fabric of polyamide 56 and polyester PET is characterized by comprising a composite white blank cord fabric and an impregnated adhesive coating arranged on the composite white blank cord fabric, wherein the composite white blank cord fabric is formed by interweaving warp composite cords and wefts, the warp composite cords are held together by polyester PET yarns and polyamide 56 yarns in an unequal length plying twisting mode, and the twist degree is 330 + 490 twists/m; the weft comprises at least one of nylon 66 and PET, and the density of the weft fibers is 22-40 tex.
2. The composite dipped cord fabric of polyamide 56 and polyester PET as claimed in claim 1, wherein the linear density ratio of said polyester PET yarn to polyamide 56 yarn is 1.27/1-1.17/1; the length ratio of the polyester PET yarns to the polyamide 56 yarns is 1.01/1-1.05/1, and the warp composite cords are 0.53-0.71mm in diameter.
3. The composite dipped cord fabric of polyamide 56 and polyester PET as claimed in claim 1, wherein said polyester PET yarn is pre-twisted polyester PET industrial filament with a pre-twist degree of 15-150 twists/m and having a twist direction S twist direction or Z twist direction; polyamide 56 yarns are polyamide 56 technical filaments that have not been pre-twisted; the polyester PET yarns and the polyamide 56 yarns are twisted in a stranding mode, and the direction of the stranding twisting is opposite to the pre-twisting direction of the polyester PET yarns.
4. The composite dipped cord fabric of polyamide 56 and polyester PET according to claim 1, wherein said polyester PET yarn is polyester PET industrial filament which has not been pre-twisted; the polyamide 56 yarn was a polyamide 56 technical filament that was not pre-twisted.
5. The composite dipped cord fabric of polyamide 56 and polyester PET as claimed in any one of claims 3 or 4, wherein said polyamide 56 industrial filaments have a linear density of 940-1500dtex and a strength of more than 8.0 cN/dtex; the polyester PET industrial filament is a high-modulus low-shrinkage HMLS polyester industrial filament, the linear density is 1100-1800dtex, the strength is more than 7.4cN/dtex, and the dimensional stability is less than 9.0 percent; the linear density of the composite dipped cord is 2200-3800dtex, the strength of the warp composite cord is 6.0-8.0 cN/dtex, the breaking elongation of the warp composite cord is 14-23%, and the 3% constant tensile force is 65-128 mN/tex.
6. The dipped cord fabric of polyamide 56 and polyester PET of claim 1 wherein the dipped adhesive coating comprises a first adhesive layer of a material which is a blocked isocyanate and epoxy reactant and a second adhesive layer of a material which is a resorcinol-formaldehyde-latex reactant.
7. The dipped cord fabric of polyamide 56 and polyester PET composite as claimed in claim 1 wherein said dipped adhesive coating is a blocked isocyanate-epoxy-rubber latex reactant.
8. A preparation method of polyamide 56 and polyester PET composite impregnated cord fabric is characterized by comprising the following steps:
(1) stranding and twisting: plying and twisting untwisted polyamide 56 yarns and polyester PET yarns on a direct twisting machine to manufacture the composite white blank cord, wherein the twisting speed is controlled to 7000 and 9000 revolutions per minute, the lengths of two yarns in the twisting process are controlled to be different, and after untwisting, the length ratio of the polyester PET yarns to the polyamide 56 industrial filaments is 1.01/1-1.05/1;
(2) weaving, namely weaving the composite white blank cord into the composite white blank cord fabric by using an air jet loom in a reed-by-reed mode;
(3) gum dipping: and (3) treating the composite white blank cord fabric by using a dipping glue solution in a two-bath dipping mode to obtain the composite dipped cord fabric.
9. The method for preparing the composite dipped cord fabric of polyamide 56 and polyester PET as claimed in claim 8, wherein the polyester PET yarn is untwisted protofilament or pre-twisted yarn; the twist of the pre-twisted yarn is 15-150 twists/meter, the twist direction is S twist direction or Z twist direction, the polyamide 56 yarn without twisting and the pre-twisted polyester PET yarn are twisted and twisted on a straight twisting machine to manufacture the composite white blank cord, and the twist direction is opposite to the direction of the pre-twisted polyester PET yarn.
10. The method for preparing the composite dipped cord fabric of polyamide 56 and polyester PET as claimed in claim 8, wherein the dipping glue solution is an aqueous dispersion containing blocked isocyanate and epoxy resin in one bath, and resorcinol-formaldehyde-latex (RFL) in two baths; or both the first bath and the second bath comprise a blocked isocyanate-epoxy-rubber latex aqueous dispersion; the impregnation process comprises the following steps: the method comprises the following steps of one-bath impregnation, primary drying, hot stretching, two-bath impregnation, secondary drying and hot setting, wherein the primary drying temperature and the secondary drying temperature are both 100-170 ℃, the hot stretching temperature and the hot setting temperature are both 210-225 ℃, and the hot stretching treatment time and the hot setting treatment time are both 4-12 min.
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| CN114293302A (en) * | 2022-01-07 | 2022-04-08 | 嘉兴博蕾新材料有限公司 | Special yarn for industrial gum dipping cord fabric and production process thereof |
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