Air leakage prevention gum dipping cord fabric, bicycle TLR tire and air spring

Abstract

The utility model relates to the technical field of tire manufacturing, in particular to an air leakage prevention gum dipping cord fabric, a bicycle TLR tire and an air spring which are used in the field of tire manufacturing. The utility model relates to an anti-air-leakage gum dipping cord fabric, which is formed by weaving warp yarns and weft yarns and is subjected to gum dipping treatment through an anti-air-leakage gum dipping solution, the fineness of the warp yarns is 100D-1000D, the warp yarns are primarily twisted yarns which are formed by twisting a plurality of nylon industrial yarns with the monofilament density of 18-45D into a strand structure on a direct twisting machine, and the twist degree of the primarily twisted yarns is 100-400T / M; the wefts are made of pure cotton yarns or nylon core-spun yarns, the count of the wefts is 110-300D, and the wefts are subjected to gum dipping treatment by adopting an anti-leakage gum dipping solution in advance. The internal strength and breaking and stretching indexes of the gum dipping cord fabric are similar to those of nylon 6, the gum dipping cord fabric has high air leakage prevention capacity, and the air permeability coefficient is basically close to that of natural rubber; after a bicycle TLR (Tubular Ready) tire is manufactured, the tire has good air leakage prevention capacity, and the durability meets the requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of tire manufacturing, and is an anti-leakage rubber-impregnated cord fabric, a bicycle TLR tire and an air spring used in the tire manufacturing field. Background Art

[0002] The revolution of tire structure and the improvement of its product performance are inseparable from the renewal of skeleton materials. As the tire industry is in urgent need of high-performance cord fabrics, more and more tire companies are beginning to pay attention to skeleton material products with special functions. One of the market segments of high-end bicycle tires is bicycle TLR (Tubeless Ready, i.e. quasi-vacuum) tires, which require good air retention, light weight and low rolling resistance. At present, they all need to be filled with anti-leakage liquid to enhance air retention performance. Without anti-leakage liquid, the air pressure retention rate for 120 hours is generally around 10%.

[0003] The Chinese invention patent application (publication number: CN115491905A, publication date: 2022-12-20) discloses a 14F multifilament plain fabric anti-leakage dipping, which is composed of: 5-8% of a 30Wt.% resorcinol aqueous solution, 2.5-5% of a 10Wt.% sodium hydroxide aqueous solution, 3-5% of a 37Wt.% formalin aqueous solution, 0.5-0.8% of ammonia water at a concentration of 20Wt.%, 10-15% of a 41Wt.% butylpyrrolidone latex aqueous solution, 22-28% of a 60Wt.% natural latex aqueous solution, and the remainder of soft water; its preparation steps include: S1 preparing a resorcinol aqueous solution, S2 preparing a sodium hydroxide aqueous solution, S3 preparing a dipping solution, and S4 after maturation, adding ammonia water, a butylpyrrolidone latex aqueous solution, and a natural latex aqueous solution, and mixing them evenly to obtain a finished product. By improving the tire cord and dipping process, the slow air leakage of the tire cord fabric can be avoided, thereby reducing the number of inflation times and improving the efficiency and life of the tire.

[0004] Although the above method can improve the technical problem of slow air leakage of the cord fabric, the anti-leakage dipping glue used has a certain surface tension, and the warp and weft of the cord fabric currently used are woven with nylon threads of about 6D. The gaps between the nylon threads are very small, and the glue cannot effectively enter the interior of the warp and weft of the cord fabric during dipping. This results in gaps inside the warp and weft of the cord fabric, which can also cause slow air leakage. Summary of the invention

[0005] In order to solve the above-mentioned technical problems, the purpose of the utility model is to provide an anti-leakage impregnated tire cord fabric. The present application further improves the warp and weft of the impregnated tire cord fabric so that the anti-leakage impregnation liquid can fully enter the interior of the warp and weft, further improving the occurrence of slow air leakage of the tire cord fabric, thereby reducing the number of inflation times and improving the use efficiency and life of the tire.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] The invention discloses an air leakage-proof dipped cord fabric, which is woven from warp and weft and treated with an air leakage-proof dipped cord fabric. The warp has a fineness of 100D-1000D, and is a plurality of nylon industrial yarns with a single-filament density of 18-45D, which are twisted on a direct twisting machine to form a single-strand primary twisted yarn, and the primary twisted yarn has a twist of 100-400T / M. The weft is made of pure cotton yarn or nylon core-spun yarn, with a count of 110D-300D, and is pre-dipped with an air leakage-proof dipped cord fabric.

[0008] Preferably, the monofilament linear density of the nylon industrial yarn is 25-40D.

[0009] Preferably, the fineness of the warp thread is 200D-600D, and the number of the monofilament threads is 10-20.

[0010] Furthermore, the utility model also discloses a bicycle TLR tire, the rubber cord fabric of the tire adopts the air leakage-proof dipped rubber cord fabric.

[0011] Furthermore, the utility model also discloses an air spring, the rubber cord fabric of which adopts the air leakage-proof rubber-impregnated cord fabric.

[0012] Due to the adoption of the above technical solution, the warp of the dipped cord fabric adopts thicker nylon industrial yarn, while reducing the number of nylon industrial yarns and reducing the twist, thereby increasing the gap inside the warp, so that the anti-leakage dipping solution can fully infiltrate the warp; at the same time, the weft of the present application is pre-impregnated, so that the anti-leakage dipping solution enters the interior of the weft in advance, thus avoiding the inability of the anti-leakage dipping solution to effectively enter the interior of the weft when the white embryo cloth is dipped. The present application further improves the warp and weft of the dipped cord fabric, so that the anti-leakage dipping solution fully enters the interior of the warp and weft, further improving the occurrence of slow air leakage of the cord fabric, thereby reducing the number of inflations and improving the efficiency and life of the tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the warp yarn of the dipped cord fabric of this application.

[0014] Figure 2 It is a schematic diagram of the structure of the warp thread of the existing dipped cord fabric.

[0015] Reference numerals: 1 - nylon industrial yarn. DETAILED DESCRIPTION

[0016] The following is a clear and complete description of the technical solutions in the embodiments of the utility model in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0017] Example 1

[0018] A method for preparing an air leakage-proof impregnated cord fabric comprises the following steps:

[0019] (1) The nylon slices are subjected to a viscosity-increasing treatment to obtain viscosity-increasing slices, wherein the viscosity of the viscosity-increasing slices is 3.2-3.5 dl / g.

[0020] (2) heating and melting the viscosity-enhanced slices obtained in step (1) and spinning them, and then cooling them using a multi-layer slow cooling device. The cooled filament bundles are oiled, drawn, shaped, and wound to obtain nylon industrial yarns; the nylon industrial yarns prepared by spinning have a single yarn density of 30D, a strength of 6.4-6.7 cN / dtex, and an elongation at break of 18.0-22.0%.

[0021] (3) 14 nylon industrial yarns are twisted into a single-strand primary twisted yarn on a direct twisting machine as the warp yarn, and the warp yarn fineness is 420D; the spindle speed is 4000 rpm, and the yarn can produce a breaking strength ≥6.2cN / dtex, a breaking elongation ≥17%, a fixed load elongation of 9.0-13.0%, and a twist of 156T / M.

[0022] (4) The weft yarn is a sizing weft yarn, made of pure cotton yarn with a count of 150D, and is pre-impregnated with anti-leakage impregnation liquid.

[0023] (5) The warp and weft threads are woven together to obtain nylon white cloth.

[0024] (6) The white embryo cloth is impregnated with an anti-leakage impregnation liquid to obtain impregnated cord cloth.

[0025] The anti-leakage impregnation liquid used for the above-mentioned weft yarn and white grey cloth is the anti-leakage impregnation liquid disclosed in Example 1 of the Chinese invention patent application (publication number: CN115491905A, publication date: 2022-12-20), with a total attached glue amount of 12.2% by mass.

[0026] Example 2

[0027] Referring to Example 1, the warp yarn has a single-filament density of 21D, 10 nylon yarns are twisted on a direct twisting machine to form a primary twisted yarn with a 1-strand structure, and the warp yarn fineness is 210D; the weft yarn is made of pure cotton yarn with a count of 110D, and is pre-dipped with an anti-leakage dipping solution. The other technical features are as described in Example 1, and a dipped cord fabric is prepared.

[0028] Example 3

[0029] Referring to Example 1, the warp yarn has a single-filament density of 30D, 14 nylon strands are twisted on a direct twisting machine to form a primary twisted yarn with a 1-strand structure, and the warp yarn fineness is 420D; the weft yarn is made of nylon core-spun yarn with a count of 150D, and is pre-dipped with an anti-leakage dipping solution. The other technical features are as described in Example 1, and a dipped cord fabric is prepared.

[0030] Comparative Example 1

[0031] Referring to Example 1, the warp yarn has a single-filament density of 6D, 70 nylon strands are twisted on a direct twisting machine to form a primary twisted yarn with a 1-strand structure, and the warp yarn fineness is 420D; the weft yarn is made of pure cotton yarn with a count of 150D, and is not pre-dipped with an anti-leakage dipping solution. Other technical features are as described in Example 1, and a dipped cord fabric is prepared.

[0032] Comparative Example 2

[0033] Referring to Example 1, the warp yarn has a single-filament density of 6D, 70 nylon strands are twisted on a direct twisting machine to form a primary twisted yarn with a 1-strand structure, and the fineness of the warp yarn is 420D; the weft yarn is made of nylon core-spun yarn with a count of 150D, and is pre-dipped with an anti-leakage dipping solution. The other technical features are as described in Example 1, and a dipped cord fabric is prepared.

[0034] Comparative Example 3

[0035] Referring to Example 1, the weft yarn is not pre-impregnated with the anti-leakage impregnation solution. Other technical features are as described in Example 1, and the impregnated cord fabric is prepared.

[0036] Comparative Example 4

[0037] Referring to Example 1, the twist of the warp is 300 T / M, and other technical features are as described in Example 1, and a dipped cord fabric is prepared.

[0038] The dipped cord fabrics of the above-mentioned Examples 1-3 and Comparative Examples 1-4 were used to produce TLR bicycle tires; the test results are as follows:

[0039] Test method:

[0040] 1. The breaking strength, breaking elongation, elongation at fixed load, twist and adhesive content shall adopt GB / T 33330-2016 Technical conditions and evaluation methods for nylon 6 dipped cord fabric;

[0041] 2. The air permeability coefficient adopts GBT1038.1-2022 Test method for gas permeability of plastic film and sheet;

[0042] 3. Durability, 52km / h test speed (with anti-leakage liquid) test;

[0043] 4. Strength performance and water pressure blasting adopt GBT9749-2008 bicycle tire performance test method;

[0044] 5. 120h air pressure retention rate, static measurement (without anti-leakage liquid) test.

[0045] 3-layer rubber-coated cord fabric, test results are as follows:

[0046] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Breaking strength N / root 34.5 15.2 33.7 37.3 36.6 34.2 33.6 Elongation at break % 22.6 21.5 22.9 23.2 23.4 22.3 23.1 22.2N fixed load elongation% 11.2 / 11.6 12.1 12.6 11.7 11.9 11.1N fixed load elongation% / 13.1 / / / / / Twist T / M 156 154 158 155 153 156 300 Glue content% 12.2 13.4 14.1 12.7 12.8 14.3 13.2 <![CDATA[Air permeability coefficient cm 3 .cm / m 2 .s.Pa]]> 1.645E-13 1.852E-13 1.528E-13 2.197E-12 1.023E-12 7.657E-13 4.018E-13

[0047] The test results of the production 29×2.2 bicycle TLR bicycle tire are as follows:

[0048] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Outer diameter mm 741.7 739.2 742.5 741.3 742.3 740.6 740.3 Durability 58 58 58 15 18 20 34 Strength properties J 16 15 15.6 16.2 15.8 14.9 15.5 Water pressure blasting kPa 821 795 847 836 842 789 793 120h air pressure retention rate% 75% 72% 76% 17% 21% 25% 52%

[0049] The above is a description of the embodiments of the utility model. Through the above description of the disclosed embodiments, professionals and technicians in the field can implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in the field. The general principles defined in this article can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown in this article, but will conform to the widest range consistent with the principles and novelties disclosed in this article.

Claims

1. An air-leakage-proof dipped cord fabric, which is woven from warp and weft and treated with an air-leakage-proof dipped liquid, characterized in that: The fineness of the warp is 100D-1000D. The warp is a plurality of nylon industrial yarns with a single yarn density of 18-45D, which are twisted into a single-strand primary twisted yarn on a direct twisting machine, and the twist of the primary twisted yarn is 100-400T / M; the material of the weft is pure cotton yarn or nylon core-spun yarn, the count is 110D-300D, and the weft is pre-impregnated with an anti-leakage impregnation liquid.

2. The air leakage-proof impregnated cord fabric according to claim 1, characterized in that: The monofilament linear density of nylon industrial yarn is 25-40D.

3. The air leakage-proof impregnated cord fabric according to claim 1, characterized in that: The fineness of the warp thread is 200D-600D, and the number of monofilament threads is 10-20.

4. A bicycle TLR tire, characterized in that: The rubber cord fabric of the tire adopts the air leakage-proof impregnated rubber cord fabric described in any one of claims 1 to 3.

5. An air spring, characterized in that: The rubber cord fabric of the air spring adopts the air leakage-proof rubber-impregnated cord fabric described in any one of claims 1 to 3.

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