阅读说明：本技术 一种斜交航空轮胎帘布层挂胶及其制备方法 (Cord fabric skim of bias aircraft tire and preparation method thereof ) 是由 伍少海 俞华英 刘蓉 于 2020-12-04 设计创作，主要内容包括：本发明提供了一种斜交航空轮胎帘布层挂胶及其制备方法,属于高分子材料技术领域。本发明采用天然橡胶和丁苯橡胶并用的生胶体系,采用改性N330炭黑并用白炭黑作为补强体系,配方中加入硅烷偶联剂KH-560、粘合增进剂AIR-1等配合剂设计一种粘合性能好的斜交航空轮胎帘布层挂胶。结果表明,胶料的自粘性能适中,有利于未硫化预制半成品胎坯的成型加工；胶料比较柔软,帘布层挂胶在反复变形时不容易产生裂口；胶料老化前、老化后与锦纶帘线耐疲劳性能好、生热低、回弹值高,动态粘合性能好,可以防止轮胎胎体层脱层、鼓包,提高斜交航空轮胎的使用寿命和安全性能。(The invention provides a cord fabric skim of an oblique aircraft tire and a preparation method thereof, belonging to the technical field of high polymer materials. The invention adopts a crude rubber system combining natural rubber and styrene-butadiene rubber, adopts modified N330 carbon black and white carbon black as a reinforcing system, and adds silane coupling agent KH-560, adhesion promoter AIR-1 and other compounding agents in the formula to design the cord fabric skim coating of the oblique aviation tire with good adhesion performance. The result shows that the self-adhesive property of the rubber material is moderate, which is beneficial to the molding processing of the unvulcanized prefabricated semi-finished tire blank; the rubber material is softer, and the cord fabric layer is not easy to crack when the cord fabric layer is repeatedly deformed; before and after the rubber material is aged, the rubber material and the polyamide cord have good fatigue resistance, low heat generation, high rebound value and good dynamic adhesion performance, can prevent the delamination and bulge of the tyre body layer, and improve the service life and the safety performance of the bias aviation tyre.)

1. The cord fabric skim coating for the bias aircraft tire is characterized by comprising the following components in parts by mass:

80-100 parts of natural rubber, 0-20 parts of styrene butadiene rubber, 35-40 parts of modified N330 carbon black, 5-10 parts of white carbon black, 1-5601 parts of silane coupling agent KH-2 parts of adhesion promoter AIR-11 parts of adhesion promoter, 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 40201.5-2.0 parts of p-phenylenediamine anti-aging agent, 1.5-2.0 parts of anti-aging agent BLE, 3-4 parts of aromatic oil, 601.5-2.0 parts of insoluble sulfur IS-601, 0.8-1.2 parts of promoter DTDM and 1.0-1.4 parts of promoter MBS.

2. The bias aircraft tire ply skim coat of claim 1, wherein the bias aircraft tire ply skim coat comprises the following components in parts by mass:

80 parts of natural rubber, 20 parts of styrene butadiene rubber, 38 parts of modified N330 carbon black, 7 parts of white carbon black, 7 parts of silane coupling agent KH-5602 parts, adhesion promoter AIR-15 parts, 5 parts of zinc oxide, 1 part of stearic acid, 40201.5 parts of p-phenylenediamine anti-aging agent, 1.8 parts of anti-aging agent BLE, 3.5 parts of aromatic oil, 601.5 parts of insoluble sulfur IS-601.5 parts, 0.8 part of accelerator DTDM and 1.2 parts of accelerator MBS.

3. The bias aircraft tire ply skim coat of claim 1, wherein the bias aircraft tire ply skim coat comprises the following components in parts by mass:

95 parts of natural rubber, 5 parts of styrene-butadiene rubber, 35 parts of modified N330 carbon black, 10 parts of white carbon black, KH-5601.2 parts of a silane coupling agent, 12 parts of an adhesion promoter AIR-12, 3.5 parts of zinc oxide, 1.8 parts of stearic acid, 40202.0 parts of a p-phenylenediamine anti-aging agent, 2 parts of an anti-aging agent BLE, 3 parts of aromatic oil, 601.6 parts of insoluble sulfur IS-601.6 parts of a promoter DTDM 1 part and 1.4 parts of a promoter MBS.

4. The bias aircraft tire ply skim coat of claim 1, wherein the bias aircraft tire ply skim coat comprises the following components in parts by mass:

100 parts of natural rubber, 40 parts of modified N330 carbon black, 5 parts of white carbon black, KH-5601 parts of silane coupling agent, 11 parts of adhesion promoter AIR, 3 parts of zinc oxide, 2 parts of stearic acid, 40201.8 parts of p-phenylenediamine anti-aging agent, 1.5 parts of anti-aging agent BLE, 4 parts of aromatic oil, 1.2 parts of insoluble sulfur IS-602 parts of accelerator DTDM and 1 part of accelerator MBS.

5. The method for preparing the cord fabric skim of the bias aircraft tire of any one of claims 1 to 4, comprising the steps of:

mixing natural rubber and styrene butadiene rubber, and carrying out first banburying to obtain a first banburying material;

mixing the first internal mixing material, white carbon black and a silane coupling agent KH-560, and carrying out second internal mixing to obtain a second internal mixing material;

mixing the second internal mixing material, zinc oxide, stearic acid, p-phenylenediamine anti-aging agent 4020, anti-aging agent BLE and adhesion promoter AIR-1, and carrying out third internal mixing to obtain a third internal mixing material;

mixing the third internal mixing material, the modified N330 carbon black and the aromatic oil, and carrying out fourth internal mixing to obtain a fourth internal mixing material;

cooling the fourth internal mixing material and standing to obtain a first-stage rubber compound;

standing the first-stage rubber compound, mixing the first-stage rubber compound with insoluble sulfur IS-60, an accelerant MBS and an accelerant DTDM, and carrying out second-stage mixing to obtain a second-stage rubber compound;

and cooling and parking the two-stage rubber compound in sequence to obtain the cord fabric skim coating of the oblique aviation tire.

6. The method according to claim 5, wherein the first banburying is carried out at a temperature of from 70 to 75 ℃ to 80 to 85 ℃.

7. The method according to claim 5, wherein the second banburying is carried out at a temperature of from 80 to 85 ℃ to 90 to 95 ℃.

8. The method according to claim 5, wherein the third banburying is carried out at a temperature of from 90 to 95 ℃ to 100 to 105 ℃.

9. The preparation method of claim 5, wherein the first-stage rubber compound IS mixed with insoluble sulfur IS-60, the MBS accelerator and the DTDM accelerator after being left for 16-24 hours.

10. The method according to claim 5, wherein the temperature of the two-stage kneading is 100 to 105 ℃ and the time is 150 seconds.

Technical Field

The invention relates to the technical field of high polymer materials, in particular to a cord fabric skim coating of an oblique aviation tire and a preparation method thereof.

Background

The bias aircraft tire has the performance characteristics of high load capacity, strong capability of absorbing instantaneous load when an airplane is in overload landing and takes off and runs, high tire body strength, long service life of a tire tread and the like. The bias aircraft tire carcass cords are arranged close to the circumferential direction, so that the radial expansion of the tire can be effectively inhibited, the generation of standing waves is delayed, and the critical speed of the tire is improved. In addition to withstanding the high air pressure of aircraft tires, the plies also withstand the high loads of the tires and cushion against external impact forces. The cord, as a reinforcement, can achieve good adhesion with rubber, directly affecting the safety and load carrying capacity of the tire. In addition, the rubber material is easy to age due to the interaction of complex external environments such as heat, oxygen and the like in the using process, the adhesive property of the rubber and the cord is reduced after aging, the rubber is separated from the cord, and the problems of tire body delamination, wire breakage and the like which affect the safety of the aircraft tire occur.

Disclosure of Invention

In view of the above, the invention aims to provide a ply skim of a bias aircraft tire and a preparation method thereof. The cord fabric hanging adhesive of the bias aircraft tire provided by the invention has excellent adhesive performance.

In order to achieve the above object, the present invention provides the following technical solutions:

the invention provides a ply skim of an oblique aviation tire, which comprises the following components in parts by mass:

80-100 parts of natural rubber, 0-20 parts of styrene butadiene rubber, 35-40 parts of modified N330 carbon black, 5-10 parts of white carbon black, 1-5601 parts of silane coupling agent KH-2 parts of adhesion promoter AIR-11 parts of adhesion promoter, 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 40201.5-2.0 parts of p-phenylenediamine anti-aging agent, 1.5-2.0 parts of anti-aging agent BLE, 3-4 parts of aromatic oil, 601.5-2.0 parts of insoluble sulfur IS-601, 0.8-1.2 parts of promoter DTDM and 1.0-1.4 parts of promoter MBS.

Preferably, the ply skim of the bias aircraft tire comprises the following components in parts by mass:

80 parts of natural rubber, 20 parts of styrene butadiene rubber, 38 parts of modified N330 carbon black, 7 parts of white carbon black, 7 parts of silane coupling agent KH-5602 parts, adhesion promoter AIR-15 parts, 5 parts of zinc oxide, 1 part of stearic acid, 40201.5 parts of p-phenylenediamine anti-aging agent, 1.8 parts of anti-aging agent BLE, 3.5 parts of aromatic oil, 601.5 parts of insoluble sulfur IS-601.5 parts, 0.8 part of accelerator DTDM and 1.2 parts of accelerator MBS.

Preferably, the ply skim of the bias aircraft tire comprises the following components in parts by mass:

95 parts of natural rubber, 5 parts of styrene-butadiene rubber, 35 parts of modified N330 carbon black, 10 parts of white carbon black, KH-5601.2 parts of a silane coupling agent, 12 parts of an adhesion promoter AIR-12, 3.5 parts of zinc oxide, 1.8 parts of stearic acid, 40202.0 parts of a p-phenylenediamine anti-aging agent, 2 parts of an anti-aging agent BLE, 3 parts of aromatic oil, 601.6 parts of insoluble sulfur IS-601.6 parts of a promoter DTDM 1 part and 1.4 parts of a promoter MBS.

Preferably, the ply skim of the bias aircraft tire comprises the following components in parts by mass:

100 parts of natural rubber, 40 parts of modified N330 carbon black, 5 parts of white carbon black, KH-5601 parts of silane coupling agent, 11 parts of adhesion promoter AIR, 3 parts of zinc oxide, 2 parts of stearic acid, 40201.8 parts of p-phenylenediamine anti-aging agent, 1.5 parts of anti-aging agent BLE, 4 parts of aromatic oil, 1.2 parts of insoluble sulfur IS-602 parts of accelerator DTDM and 1 part of accelerator MBS.

The invention also provides a preparation method of the ply skim of the bias aircraft tire, which comprises the following steps:

mixing natural rubber and styrene butadiene rubber, and carrying out first banburying to obtain a first banburying material;

mixing the first internal mixing material, white carbon black and a silane coupling agent KH-560, and carrying out second internal mixing to obtain a second internal mixing material;

mixing the second internal mixing material, zinc oxide, stearic acid, p-phenylenediamine anti-aging agent 4020, anti-aging agent BLE and adhesion promoter AIR-1, and carrying out third internal mixing to obtain a third internal mixing material;

mixing the third internal mixing material, the modified N330 carbon black and the aromatic oil, and carrying out fourth internal mixing to obtain a fourth internal mixing material;

cooling the fourth internal mixing material and standing to obtain a first-stage rubber compound;

standing the first-stage rubber compound, mixing the first-stage rubber compound with insoluble sulfur IS-60, an accelerant MBS and an accelerant DTDM, and carrying out second-stage mixing to obtain a second-stage rubber compound;

and cooling and parking the two-stage rubber compound in sequence to obtain the cord fabric skim coating of the oblique aviation tire.

Preferably, the first banburying is carried out at the temperature of between 70 and 75 ℃ and between 80 and 85 ℃.

Preferably, the second banburying is carried out at the temperature of between 80 and 85 ℃ and between 90 and 95 ℃.

Preferably, the third banburying is carried out from 90-95 ℃ to 100-105 ℃.

Preferably, the first-stage rubber compound IS mixed with insoluble sulfur IS-60, an accelerant MBS and an accelerant DTDM after standing for 16-24 hours.

Preferably, the temperature of the two-stage mixing is 100-105 ℃, and the time is 150 s.

The invention provides a ply skim of an oblique aviation tire, which comprises the following components in parts by mass: 80-100 parts of natural rubber, 0-20 parts of styrene butadiene rubber, 35-40 parts of modified N330 carbon black, 5-10 parts of white carbon black, 1-5601 parts of silane coupling agent KH-2 parts of adhesion promoter AIR-11 parts of adhesion promoter, 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 40201.5-2.0 parts of p-phenylenediamine anti-aging agent, 1.5-2.0 parts of anti-aging agent BLE, 3-4 parts of aromatic oil, 601.5-2.0 parts of insoluble sulfur IS-601, 0.8-1.2 parts of promoter DTDM and 1.0-1.4 parts of promoter MBS. The invention adopts the combination of natural rubber and butadiene styrene rubber, the natural rubber has excellent comprehensive performance, is easy to generate induced crystallization under deformation, and has the characteristics of good mechanical property and processability; the styrene butadiene rubber has good adhesiveness, processability, heat resistance and physical and mechanical properties, and the styrene butadiene rubber added into the rubber material is favorable for mutual combination with butadiene-picolatex rubber molecular chains in the gum dipping layer. The reinforcing system adopts modified N330 carbon black and white carbon black, the modified N330 carbon black is reinforcing carbon black and has the characteristics of easy dispersion and low impurity content, and the cord fabric layer rubberizing added with the modified N330 carbon black has good fatigue resistance, high strength and low heat generation; the silica filled NR/SBR blended rubber can obviously reduce the hysteresis loss of the rubber material, the compression fatigue temperature rise of the rubber material after the silica is added is reduced, the defect of higher temperature rise when the rubber material reinforced by the modified N330 carbon black is used is overcome, the heat generation of the rubber material can be reduced by adding the silica, the bonding with a tire cord fabric gum dipping layer is facilitated, and the combination of the silica and the modified N330 carbon black can ensure that the rubber material has better comprehensive performance; the silane coupling agent KH-560 is an excellent adhesion promoter, can improve the adhesion between rubber and a cord after aging, and greatly improve the bending strength, the tensile strength and the interlaminar shear strength of the fiber reinforced composite material in a dry and wet state; the adhesion promoter AIR-1 is a mixture of a high-activity organic amine compound and an inorganic substance containing a large number of active groups, is added into cord fabric rubber, plays a role of a bridge between rubber and cord fabric, generates firm chemical bonding, improves the adhesive strength and improves the rubber coating state of the cord fabric; the anti-aging system adopts the combination of the p-phenylenediamine anti-aging agent 4020 and the ketoamine anti-aging agent BLE, the p-phenylenediamine anti-aging agent 4020 has excellent protection efficiency on flex fatigue aging, and has a good protection effect on heat, oxygen, copper, manganese and other harmful metals, and the ketoamine anti-aging agent BLE plays a role in anti-aging and is simultaneously beneficial to the adhesion of rubber and cord; the insoluble sulfur IS-60 can avoid the problems of non-sticking surface of a semi-finished product and low interlayer bonding strength caused by spraying sulfur at high temperature, the insoluble sulfur IS-60 IS a homopolymer of sulfur, the prepared rubber compound IS not easy to frost, the surface viscosity of rubber material and rubberized cord fabric can be good, and the quality of a finished product tire can be further ensured; the sulfur-containing accelerator DTDM has a scorch-proof group and a vulcanization group, so that the rubber material has longer scorch time and faster vulcanization speed, the vulcanization temperature range is wide, and the rubber material has excellent reduction resistance; the promoter MBS is used as a post-effect quick vulcanization promoter, has longer scorching time and good operation safety. The invention uses the materials and accurately limits the dosage of each raw material, so that the rubber compound has good comprehensive performance, is used as the cord fabric skim coating of the bias aviation tire, and has excellent adhesive property of the rubber/cord line composite material. Under the harsh high-speed and high-load using conditions of the tire, the quality problems of delaminating, bulging and the like do not occur at the cord fabric layer part, and the tire is safe to use.

The invention has the advantages that:

1. the method adopts a mode of combining static adhesion performance with dynamic adhesion performance, combining the self-adhesion performance of the rubber material after vulcanization and the adhesion performance of the rubber material after vulcanization to test the adhesion performance between the rubber material and the cord fabric layer, and can more systematically simulate the real state of the rubber in the process of processing, forming and using compared with the traditional method of representing by only adopting H extraction force;

2. the cord fabric rubberizing sizing material is softer, gradient modulus is generated among the cord fabric rubberizing, the gum dipping layer and the framework material, stress is effectively transmitted, and the cord fabric rubberizing is not easy to generate cracks in the high-temperature and repeated deformation process;

3. the cord fabric layer rubberizing self-adhesive performance is moderate, and the forming processing of an unvulcanized prefabricated semi-finished tire blank is facilitated; the vulcanized rubber before and after aging and the polyamide cord have good static adhesion, high dynamic adhesion strength of the cord, good fatigue resistance, low heat generation, high rebound value and small hysteresis loss, can prevent the delamination and bulging of the tire body layer, and improve the service life and the safety performance of the bias aircraft tire;

4. the invention adopts natural rubber, and has excellent comprehensive performance; the cord fabric layer rubberizing can meet the performance requirements of high speed, high load and high retreading times of the future new aircraft type aircraft tire.

The data of the examples show that the performance of the ply skim provided by the present invention is shown in table 1.

TABLE 1 Properties of ply skim for bias aircraft tires provided by the present invention

Drawings

Fig. 1 is a schematic structural diagram of a bias aircraft tire, wherein 1 is a tread rubber, 2 is a ply, 3 is a carcass layer, 4 is a sidewall, and 5 is an inner liner.

Detailed Description

The invention provides a ply skim of an oblique aviation tire, which comprises the following components in parts by mass:

80-100 parts of natural rubber, 0-20 parts of styrene butadiene rubber, 35-40 parts of modified N330 carbon black, 5-10 parts of white carbon black, 1-5601 parts of silane coupling agent KH-2 parts of adhesion promoter AIR-11 parts of adhesion promoter, 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 40201.5-2.0 parts of p-phenylenediamine anti-aging agent, 1.5-2.0 parts of anti-aging agent BLE, 3-4 parts of aromatic oil, 601.5-2.0 parts of insoluble sulfur IS-601, 0.8-1.2 parts of promoter DTDM and 1.0-1.4 parts of promoter MBS.

In the invention, the ply skim of the bias aircraft tire preferably comprises the following components in parts by mass:

80 parts of natural rubber, 20 parts of styrene butadiene rubber, 38 parts of modified N330 carbon black, 7 parts of white carbon black, 7 parts of silane coupling agent KH-5602 parts, adhesion promoter AIR-15 parts, 5 parts of zinc oxide, 1 part of stearic acid, 40201.5 parts of p-phenylenediamine anti-aging agent, 1.8 parts of anti-aging agent BLE, 3.5 parts of aromatic oil, 601.5 parts of insoluble sulfur IS-601.5 parts, 0.8 part of accelerator DTDM and 1.2 parts of accelerator MBS.

Or comprises the following components in parts by mass:

95 parts of natural rubber, 5 parts of styrene-butadiene rubber, 35 parts of modified N330 carbon black, 10 parts of white carbon black, KH-5601.2 parts of a silane coupling agent, 12 parts of an adhesion promoter AIR-12, 3.5 parts of zinc oxide, 1.8 parts of stearic acid, 40202.0 parts of a p-phenylenediamine anti-aging agent, 2 parts of an anti-aging agent BLE, 3 parts of aromatic oil, 601.6 parts of insoluble sulfur IS-601.6 parts of a promoter DTDM 1 part and 1.4 parts of a promoter MBS.

Or comprises the following components in parts by mass:

100 parts of natural rubber, 40 parts of modified N330 carbon black, 5 parts of white carbon black, KH-5601 parts of silane coupling agent, 11 parts of adhesion promoter AIR, 3 parts of zinc oxide, 2 parts of stearic acid, 40201.8 parts of p-phenylenediamine anti-aging agent, 1.5 parts of anti-aging agent BLE, 4 parts of aromatic oil, 1.2 parts of insoluble sulfur IS-602 parts of accelerator DTDM and 1 part of accelerator MBS.

In the invention, the white carbon black is preferably precipitated white carbon black, the precipitated white carbon black is easier to disperse than gas-phase white carbon black, the precipitated white carbon black is a component in a methyl-ethyl bonding system, and the addition of the precipitated white carbon black is favorable for bonding the skim coating rubber material and the methyl-ethyl system in the cord surface dipping layer.

The invention also provides a preparation method of the ply skim of the bias aircraft tire, which comprises the following steps:

mixing natural rubber and styrene butadiene rubber, and carrying out first banburying to obtain a first banburying material;

mixing the first internal mixing material, white carbon black and a silane coupling agent KH-560, and carrying out second internal mixing to obtain a second internal mixing material;

mixing the second internal mixing material, zinc oxide, stearic acid, p-phenylenediamine anti-aging agent 4020, anti-aging agent BLE and adhesion promoter AIR-1, and carrying out third internal mixing to obtain a third internal mixing material;

mixing the third internal mixing material, the modified N330 carbon black and the aromatic oil, and carrying out fourth internal mixing to obtain a fourth internal mixing material;

cooling the fourth internal mixing material and standing to obtain a first-stage rubber compound;

standing the first-stage rubber compound, mixing the first-stage rubber compound with insoluble sulfur IS-60, an accelerant MBS and an accelerant DTDM, and carrying out second-stage mixing to obtain a second-stage rubber compound;

and cooling and parking the two-stage rubber compound in sequence to obtain the cord fabric skim coating of the oblique aviation tire.

In the invention, the first banburying is preferably carried out from 70-75 ℃ to 80-85 ℃.

In the invention, the second banburying is preferably carried out at the temperature of 80-85 ℃ to 90-95 ℃.

In the invention, the third banburying is preferably carried out from 90-95 ℃ to 100-105 ℃.

In the invention, the fourth banburying is preferably carried out from 100-105 ℃ to 130-135 ℃.

In the present invention, the mixing is preferably carried out in an internal mixer.

In the present invention, the total process of the first internal mixing, the second internal mixing, the third internal mixing and the fourth internal mixing is called one-stage mixing, and the time for one-stage mixing is preferably 200 s.

In the invention, the first-stage rubber compound IS placed for 16-24 h and then mixed with insoluble sulfur IS-60, an accelerant MBS and an accelerant DTDM. In the invention, the compounding ingredients can be automatically and slightly dispersed in the standing process for 16-24 h, the natural rubber and the white carbon black can form the combined rubber, the performance of the mixed rubber is improved, and if the mixed rubber is directly subjected to two-stage mixing without standing, the performance of the mixed rubber is obviously lower than that of the parked mixed rubber.

In the invention, the temperature of the two-stage mixing is preferably 100-105 ℃, and the time is preferably 150 s.

Fig. 1 is a schematic structural diagram of a bias aircraft tire, wherein 1 is a tread rubber, 2 is a ply, 3 is a carcass layer, 4 is a sidewall, and 5 is an inner liner.

For further illustration of the present invention, the following describes the cross-ply aircraft tire ply skim and the preparation method thereof in detail with reference to examples, but they should not be construed as limiting the scope of the present invention.

Examples

The raw material usage amounts of the ply skim of the bias aircraft tires of examples 1 to 3 and comparative examples 1 to 2 are shown in table 2. Wherein the natural rubber is purchased from Yunnan natural rubber industry group Co., Ltd, and the modified N330 carbon black is purchased from Guangdong Maoming Huaxing carbon black Co., Ltd.

TABLE 2 raw material usage amounts of ply skim of examples 1 to 3 and comparative examples 1 to 2 of bias aircraft tires

The preparation process of the ply skim of the bias aircraft tire in the examples 1 to 3 and the comparative examples 1 to 2 is as follows:

first-stage mixing:

(1) adding natural rubber plasticated rubber and styrene butadiene rubber into an internal mixer, wherein the mixing temperature is increased from 70 ℃ to 80 ℃;

(2) adding the precipitated white carbon black and the silane coupling agent KH-560 into an internal mixer according to the proportion, mixing and banburying, wherein the mixing temperature is increased from 80 ℃ to 90 ℃;

(3) putting zinc oxide, stearic acid, p-phenylenediamine anti-aging agent 4020, anti-aging agent BLE and adhesion promoter AIR-1 into an internal mixer in proportion, mixing and banburying, wherein the mixing temperature is increased from 90 ℃ to 100 ℃;

(4) putting N330 carbon black and aromatic oil into an internal mixer according to a proportion, mixing and internally mixing, wherein the mixing temperature is increased from 100 ℃ to 130 ℃;

(5) and (3) discharging the mixture out of the internal mixer to the upper and lower pieces of the tablet press when the mixing temperature reaches 130 ℃, cooling and standing to obtain a first-stage rubber compound, wherein the time for the first-stage mixing is 200 seconds.

And (3) second-stage mixing:

(1) standing the first-stage rubber compound for 16h, adding insoluble sulfur IS-60, sulfenamide accelerator MBS and sulfur-containing accelerator DTDM and the first-stage rubber compound according to the proportion into an internal mixer, and mixing and internally mixing to 100 ℃;

(2) discharging the mixture from the internal mixer to the upper and lower pieces of the tablet press, cooling and standing, wherein the rubber is final rubber, namely the cord fabric layer rubber hanging rubber compound. The total time for the two-stage mixing was 150 seconds.

The rubberized cord fabric is rolled by a three-roller calender, is made into a cord fabric cylinder on a laminating machine, is molded on a molding machine to be made into a tire blank, and is vulcanized by a vulcanizing machine to be a tire finished product. Table 3 shows the results of the performance tests of the ply skim of the bias aircraft tires obtained in examples 1 to 3 and comparative examples 1 to 2. As can be seen from Table 3, the cord fabric rubberizing sizing material of the invention is softer, and gradient modulus is generated among the cord fabric rubberizing, the gum dipping layer and the framework material, so that stress can be effectively transferred, and the cord fabric rubberizing is not easy to generate cracks in the high-temperature and repeated deformation processes; the self-adhesive performance is moderate, which is beneficial to the molding processing of the unvulcanized prefabricated semi-finished tire blank; the vulcanized rubber before and after aging and the polyamide cord have good static adhesion, high dynamic adhesion strength of the cord, good fatigue resistance, low heat generation, high rebound value and small hysteresis loss, can prevent the delamination and bulging of the tire body layer, and improve the service life and the safety performance of the bias aircraft tire.

TABLE 3 Performance of skim coats for bias aircraft tire plies prepared in examples 1-3 and comparative examples 1-2

The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the protection scope of the present invention.