阅读说明：本技术 一种用于橡胶粘性测试的标准样本制备方法及橡胶样品测试方法 (Standard sample preparation method for rubber viscosity test and rubber sample test method ) 是由 刘东鹏 汤汝松 于 2020-12-18 设计创作，主要内容包括：本发明提供了一种用于橡胶粘性测试的标准样本制备方法,包括：将1500D/2/25.5的帘子布原纱使用第一胶料上胶后进行辐射照射,得到帘纱样本；所述第一胶料包括天然橡胶3#、顺丁橡胶、天然橡胶10#、炭黑、白炭黑、油、活性剂和硫磺；在所述帘纱样本两侧贴附第二胶料,进行半硫化,得到标准样本；所述第二胶料包括天然橡胶3#、顺丁橡胶、天然橡胶10#、炭黑、油、活性剂和硫磺。本发明提供了一种橡胶样品的测试方法,采用所述制备方法得到的标准样本,固定在粘性轮拉离式粘性机上,对橡胶半制品待测样品的表面粘性进行测试。本发明制备的标准样本可与所有其他橡胶半制品进行粘性测试,对同一橡胶粘性有较高的稳定性。(The invention provides a standard sample preparation method for rubber viscosity test, which comprises the following steps: sizing raw cord fabric yarn of 1500D/2/25.5 by using a first sizing material, and then performing radiation irradiation to obtain a cord yarn sample; the first rubber material comprises natural rubber No. 3, butadiene rubber, natural rubber No. 10, carbon black, white carbon black, oil, an active agent and sulfur; attaching second sizing materials to two sides of the cord yarn sample, and performing semi-vulcanization to obtain a standard sample; the second rubber material comprises natural rubber No. 3, butadiene rubber, natural rubber No. 10, carbon black, oil, an active agent and sulfur. The invention provides a method for testing a rubber sample, wherein a standard sample obtained by adopting the preparation method is fixed on a viscous wheel pull-off type viscous machine to test the surface viscosity of a rubber semi-product sample to be tested. The standard sample prepared by the invention can be used for viscosity test with all other rubber semi-finished products, and has higher stability for the same rubber viscosity.)

1. A standard sample preparation method for rubber tack testing, comprising the steps of:

s1, sizing the cord fabric raw yarn of 1500D/2/25.5 by using a first sizing material, and then performing radiation irradiation to obtain a cord yarn sample; the first rubber material comprises natural rubber No. 3, butadiene rubber, natural rubber No. 10, carbon black, white carbon black, oil, an active agent and sulfur;

s2, attaching second sizing materials to two sides of the cord yarn sample, and performing semi-vulcanization to obtain a standard sample;

the second rubber compound comprises natural rubber No. 3, butadiene rubber, natural rubber No. 10, carbon black, oil, an active agent and sulfur, and the standard Mooney viscosity of the second rubber compound is 55 +/-2 degrees.

2. The method for preparing a standard sample according to claim 1, wherein the first rubber compound comprises, in parts by mass: 75 parts of natural rubber 3#, 10 parts of butadiene rubber and 15 parts of natural rubber 10 #; the mass ratio of the natural rubber 3#, the butadiene rubber and the natural rubber 10# in the second rubber material is (71-73): (4-6): (20-25).

3. The standard sample preparation method of claim 1, wherein the first and second sizes each further comprise: tackifying resin, an anti-aging component, a processing aid, an anti-scorching agent and an accelerator; the second sizing material does not contain white carbon black.

4. The method for preparing a standard sample according to any one of claims 1 to 3, wherein the second sizing material comprises in particular, in parts by mass: 71-73 parts of natural rubber No. 3, 4-6 parts of butadiene rubber, 20-25 parts of natural rubber No. 10, 45-55 parts of carbon black, 20-30 parts of oil, 2-3 parts of tackifying resin, 4-5 parts of an active agent, 3-4 parts of an anti-aging component, 1-2 parts of a processing aid, 1-2 parts of sulfur, 0-0.2 part of an anti-scorching agent and 1-1.5 parts of an accelerator.

5. The method of preparing a standard sample according to claim 4, wherein the cord sample is 1-1.2mm thick on both sides of the sizing after semi-vulcanization.

6. The method for preparing a standard sample according to any one of claims 1 to 3, wherein step S2 is specifically: and attaching a second sizing material to the two sides of the cord yarn sample, wrapping the cord yarn sample with the high-temperature PE on the two sides, and then performing semi-vulcanization by a flat vulcanizing machine to obtain a standard sample.

7. The method for preparing a standard sample according to claim 6, wherein the temperature of the semi-vulcanization is 105 ℃ and 110 ℃, the time is 4-5 minutes, and the mold clamping force is 2 MPa.

8. The method for preparing a standard sample according to claim 6, wherein the semi-vulcanized product is naturally cooled, and the obtained standard sample is stored under constant temperature and humidity conditions.

9. A method of testing a rubber sample, comprising the steps of:

a method for measuring the surface tackiness of a rubber semi-finished product by fixing a standard specimen obtained by the method for producing the rubber semi-finished product according to any one of claims 1 to 8 to a tack wheel-pull-off type tack machine, wherein the tack value of the specimen to be measured is a value read by a sensor when the tack wheel is lifted.

10. The test method according to claim 9, wherein the time for pressing the adhesive wheel against the sample to be tested is 3 to 5 seconds and the pressure is 5N.

Technical Field

The invention relates to the technical field of rubber products, in particular to a preparation method of a standard sample for rubber viscosity test and a test method of a rubber sample.

Background

The surface viscosity of the rubber semi-finished product is directly related to the tire to carry out the molding operation more efficiently, and when the viscosity is poor, the phenomenon that the gas between the semi-finished products cannot be completely discharged after vulcanization is easy to occur, so that the quality is poor is caused. Therefore, after the formula developer completes the development of the tire formula, the evaluation of the viscosity of the semi-finished product of the engineering operation is an important project for all the evaluation before production.

The viscosity testing instrument commonly used in the industry is mainly a TOYOSEIKI P-3 viscosity verifier, and the structural composition of the instrument is shown in FIG. 1. The viscosity tester is a pull-off type tester and is a simple instrument for testing the surface viscosity of bonding bodies such as unvulcanized rubber and the like; during testing, the adhesive wheel descends and is pressed with a sample to be tested, the contact part of the adhesive wheel and the sample to be tested is a standard sample, the adhesive value of the sample to be tested is the value read by the sensor when the adhesive wheel ascends, and the unit is N.s/m². As shown in fig. 2, the standard sample is a rubberized cord fabric material, the size of the used raw yarn is generally 1000D/2/24, the raw yarn is cut to a fixed size after rubberizing and EBR irradiation, finally, the prepared standard sample is fixed on a sticking machine, the surface sticking of the semi-finished product sample to be tested is tested, and the obtained data is sticking data. Wherein, the sizing material for sizing mainly adopts natural rubber No. 3, butadiene rubber and natural rubber No. 10, and a large amount of carbon black and a small amount of white carbon black, oil and other rubber auxiliary materials are added.

Fig. 3 is a schematic view of a prior art standard sample, wherein black is a cord fabric and white areas are a rubber material, the rubber thickness being typically 1 mm. The standard sample is formed after the cord fabric is glued, and the surface of the standard sample is uneven due to gaps among the cord fabric arrangements, so that the contact area is different during testing, and the result of the simultaneous testing is unstable. Moreover, because the standard sample cord fabric used each time is not semi-vulcanized and is greatly influenced by factors such as the standing time, the Mooney viscosity among batches of the sizing materials, the external temperature and the like, the viscosity value difference of the sample measured by the same semi-finished product is also large, finally, developers cannot correctly master the viscosity condition of each semi-finished product, the formula can be adjusted through the operation condition and the viscosity test data of each time on the site viscosity expression of the developed formula continuously, and the formula development period and the development cost are greatly increased.

Disclosure of Invention

In view of the above, the present application provides a method for preparing a standard sample for rubber adhesion test and a method for testing a rubber sample, wherein the prepared standard sample can be used for adhesion test with all other rubber semi-finished products, and the standard sample has higher stability for the same rubber adhesion.

The invention provides a preparation method of a standard sample for rubber viscosity test, which comprises the following steps:

s1, sizing the cord fabric raw yarn of 1500D/2/25.5 by using a first sizing material, and then performing radiation irradiation to obtain a cord yarn sample; the first rubber material comprises natural rubber No. 3, butadiene rubber, natural rubber No. 10, carbon black, white carbon black, oil, an active agent and sulfur;

s2, attaching second sizing materials to two sides of the cord yarn sample, and performing semi-vulcanization to obtain a standard sample;

the second rubber compound comprises natural rubber No. 3, butadiene rubber, natural rubber No. 10, carbon black, oil, an active agent and sulfur, and the standard Mooney viscosity of the second rubber compound is 55 +/-2 degrees.

Preferably, the first compound comprises, in parts by mass: 75 parts of natural rubber 3#, 10 parts of butadiene rubber and 15 parts of natural rubber 10 #; the mass ratio of the natural rubber 3#, the butadiene rubber and the natural rubber 10# in the second rubber material is (71-73): (4-6): (20-25).

Preferably, the first and second compounds each further comprise: tackifying resin, an anti-aging component, a processing aid, an anti-scorching agent and an accelerator; the second sizing material does not contain white carbon black.

Preferably, the second rubber compound specifically includes, in parts by mass: 71-73 parts of natural rubber No. 3, 4-6 parts of butadiene rubber, 20-25 parts of natural rubber No. 10, 45-55 parts of carbon black, 20-30 parts of oil, 2-3 parts of tackifying resin, 4-5 parts of an active agent, 3-4 parts of an anti-aging component, 1-2 parts of a processing aid, 1-2 parts of sulfur, 0-0.2 part of an anti-scorching agent and 1-1.5 parts of an accelerator.

Preferably, the thickness of the sizing materials on both sides of the cord yarn sample after semi-vulcanization is 1-1.2 mm.

Preferably, step S2 is specifically: and attaching a second sizing material to the two sides of the cord yarn sample, wrapping the cord yarn sample with the high-temperature PE on the two sides, and then performing semi-vulcanization by a flat vulcanizing machine to obtain a standard sample.

Preferably, the temperature of the semi-vulcanization is 105-110 ℃, the time is 4-5 minutes, and the mold clamping force is 2 MPa.

Preferably, the semi-vulcanized product is naturally cooled, and the obtained standard sample is stored under the conditions of constant temperature and constant humidity.

The invention provides a test method of a rubber sample, which comprises the following steps:

the standard sample obtained by the preparation method is fixed on a viscous wheel pull-off type viscous machine, the surface viscosity of the rubber semi-product sample to be tested is tested, and the viscosity value of the sample to be tested is a value read by an inductor when the viscous wheel rises.

Preferably, the pressing time of the adhesive wheel and the sample to be tested is 3-5 seconds during the test, and the pressure is 5N.

In the embodiment of the invention, 1500D/2/25.5 raw yarn is adopted, the same sizing material as the original standard sample is firstly used, rubberized by a rubberizing machine and subjected to EBR irradiation, a curtain yarn sample with the size of 12 x 200mm is cut, a novel rubber composition (with the standard Mooney viscosity of 55 +/-2 ℃) is stuck to two sides of the curtain yarn sample, and finally, a flat vulcanizing machine is used for semi-vulcanizing to obtain the optimized standard sample. The standard sample prepared by the method has stable viscosity data, can be used for viscosity test with other rubber semi-products, has higher stability (under the condition of small environmental difference) for the same rubber viscosity, and allows developers to obtain relatively accurate viscosity data.

Drawings

FIG. 1 is a schematic diagram showing the structural composition of a TOYOSEIKI P-3 viscosity verifier;

FIG. 2 is a schematic diagram showing the composition of a test pattern;

FIG. 3 is a schematic diagram of a prior art standard sample;

FIG. 4 is a schematic representation of a standard sample prepared in accordance with the present invention;

FIG. 5 shows the results of measuring the difference in the viscosity of the original standard sample in example 1 of the present invention;

FIG. 6 shows the results of testing the tack difference of the standard sample in example 1 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a preparation method of a standard sample for rubber viscosity test, which comprises the following steps:

s1, sizing the cord fabric raw yarn of 1500D/2/25.5 by using a first sizing material, and then performing radiation irradiation to obtain a cord yarn sample; the first rubber material comprises natural rubber No. 3, butadiene rubber, natural rubber No. 10, carbon black, white carbon black, oil, an active agent and sulfur;

s2, attaching second sizing materials to two sides of the cord yarn sample, and performing semi-vulcanization to obtain a standard sample;

the second rubber compound comprises natural rubber No. 3, butadiene rubber, natural rubber No. 10, carbon black, oil, an active agent and sulfur, and the standard Mooney viscosity of the second rubber compound is 55 +/-2 degrees.

In order to solve the problem of instability of surface viscosity detection data of each rubber semi-finished product before tire molding, the invention optimizes a standard sample by a certain method on the basis of the existing testing instrument and increases the stability of rubber viscosity test.

The embodiment of the invention adopts 1500D/2/25.5 cord fabric raw yarn; the tyre fabric is a tyre skeleton fabric woven by using strong plied yarns as warps and using medium and fine single yarns as wefts, wherein the warps are also called as tyre threads and bear main load, and the wefts fix the positions of the warps. The cord includes cotton cord, viscose cord, nylon cord, steel cord, nylon cord, polypropylene cord, aramid cord, carbon fiber cord, PEN cord, etc. In the above specification, 1500D means a weight of 1500g per 9000m of the yarn; d is the abbreviation of Denier, a unit for measuring fiber thickness, and refers to the weight in grams of 9000 meters of filament at official moisture regain (the national standard for moisture regain of various textile materials for weight and price accounting, known as official moisture regain, in trade and cost accounting), also known as Denier, 1500g, 1500D. In the above specification, 2: one yarn is wound by 2 strands of single yarn; 25.5: there were 25.5 yarns (26 yarns) per inch of wide screen.

In the embodiment of the invention, the cord fabric sample is obtained by using the same sizing material as the original standard sample and cutting the cord fabric sample through gluing and EBR irradiation by a gluing machine. The rubber material with the same original standard sample is called a first rubber material, and the formula mainly comprises natural rubber No. 3, butadiene rubber, natural rubber No. 10, carbon black, white carbon black, oil, an active agent, sulfur and the like. And, the first compound further comprises: tackifying resin, an anti-aging component, a processing aid, an anti-scorching agent and an accelerator.

Natural rubber can be divided into two main categories according to morphology: solid natural rubber (rubber pieces and granulated rubber) and concentrated latex, the solid natural rubber accounts for a large proportion in use. The film can be divided into smoked sheet glue, air-dried film, white wrinkled sheet, brown wrinkled sheet and the like according to different manufacturing processes and shapes, and the smoked sheet glue has large consumption and wide application. The smoked sheet glue is generally classified according to the appearance and is divided into six levels such as special level, first level, second level, third level, fourth level, fifth level and the like. The granular glue (i.e. standard glue) is classified according to international uniform physicochemical performances and indexes, the physicochemical performances comprise seven items of impurity content, initial plasticity value and the like, wherein the impurity content is taken as a main index, and the granular glue is divided into five grades of 5L, 5, 10, 20, 50 and the like according to the amount of impurities.

The natural rubber No. 3 is smoked sheet rubber No. 3, and the natural rubber No. 10 is standard rubber No. 10, and are all commercially available products. Butadiene rubber is a short name for cis-1, 4-polybutadiene rubber and is polymerized by butadiene; the embodiment of the invention mainly adopts butadiene rubber with the brand BR 9000. Specifically, the rubber component in the first rubber compound comprises: 75 parts by mass of natural rubber 3#, 10 parts by mass of butadiene rubber and 15 parts by mass of natural rubber 10 #.

The formulation components of the first rubber compound are not particularly limited in the examples of the application, and the conventional methods can be adopted. For example, the carbon black is super-resistant high-ductility medium-super wear-resistant furnace black SAF, N110; the oil is environment-friendly aromatic oil TDAE. The active agent comprises zinc oxide ZnO and stearic acid SA; the anti-aging component comprises a chemical anti-aging agent and physical protective wax; the accelerator is CBS (N-cyclohexyl-2-benzothiazole sulfonamide). In proportion, the first rubber material can comprise 60 parts by mass of carbon black, 5 parts by mass of white carbon black, 20 parts by mass of TDAE, and conventional amount of auxiliary agent and sulfur.

The embodiment of the invention has no special limitation on the process conditions of gluing and radiation irradiation, and the cord fabric sample with the size of 12 multiplied by 200mm can be cut, and the thickness of the cord fabric sample is 1 mm.

After the cord fabric sample is obtained, the embodiment of the invention uses a second rubber compound (with standard Mooney viscosity of 55 +/-2 degrees and a specific formula composition different from that of the first rubber compound) to be attached to two surfaces of the cord fabric sample, preferably uses high-temperature PE to wrap the cord fabric sample on two surfaces, and then carries out semi-vulcanization through a flat vulcanizing machine to obtain the standard sample.

In the present invention, the second compound comprises natural rubber #3, butadiene rubber, natural rubber # 10, carbon black, oil, an active agent and sulfur. The second compound further comprises: tackifying resin, an anti-aging component, a processing aid, an anti-scorching agent and an accelerator; the second sizing material does not contain white carbon black. The main composition types of the second rubber compound are the same as those of the first rubber compound, and the mixture ratio is different. Preferably, the mass ratio of the natural rubber 3#, the butadiene rubber and the natural rubber 10# in the second rubber material is (71-73): (4-6): (20-25), and more preferably 72:5: 23. For a raw rubber system, the natural rubber is saturated in molecular structure and slightly stronger in chemical stability than butadiene rubber, so that the ratio of the natural rubber to the butadiene rubber is mainly adjusted. In addition, the content of carbon black and white carbon black is adjusted, the dispersibility of the reinforcing system has large influence on the surface of rubber, and if the particles on the surface of the rubber material in unit area are easy to be unstable.

In the embodiment of the invention, the second rubber compound specifically comprises the following components in parts by mass: 71-73 parts of natural rubber No. 3, 4-6 parts of butadiene rubber, 20-25 parts of natural rubber No. 10, 45-55 parts of carbon black, 20-30 parts of oil, 2-3 parts of tackifying resin, 4-5 parts of an active agent, 3-4 parts of an anti-aging component, 1-2 parts of a processing aid, 1-2 parts of sulfur, 0-0.2 part of an anti-scorching agent and 1-1.5 parts of an accelerator.

The embodiment of the invention finely adjusts the dosage of the tackifying resin and the active agent, and increases the stability of the viscosity of the surface of the rubber material (the tackifier has stable chemical properties at normal temperature). In addition, the embodiment of the invention slightly reduces the consumption of the sulfur, and can effectively reduce the sulfur blooming phenomenon (the blooming amount is continuously increased along with the prolonging of the time, and the influence on the viscosity is larger). In summary, the sample size in the examples of the present invention has increased viscosity and stability. In addition, the anti-scorching agent is named as a vulcanization retarder, and is a substance for preventing the rubber compound from generating an early vulcanization phenomenon in the processing process; PVI, CTP and the like are common.

Mooney viscocity (Mooney viscocity), also known as rotational (Mooney) viscosity, is a value measured by Mooney viscometer and basically reflects the degree of polymerization and molecular weight of synthetic rubber. In China, ML100 ℃ 1+4 or MS100 ℃ 1+4 is usually used as a reference, wherein M represents Mooney, L represents a large rotor, S represents a small rotor, 1 represents preheating for 1 minute, and 4 represents testing for 4 minutes. The larger the Mooney value, the higher the viscosity, and the lower the plasticity, and is widely used as an index for controlling the processing property of rubber compounds. In the present invention, the standard Mooney viscosity of the second compound is 55. + -.2 ° (as specified in GB 1232 standard).

According to the invention, a viscosity test standard sample is optimized, the novel composition is attached to two sides of the rubberized cord yarn, and semi-vulcanization is carried out by a flat vulcanizing machine, so that a relatively stable viscosity test standard sample is prepared. The semi-vulcanization conditions preferably include: the temperature is 105 ℃ and 110 ℃, preferably 110 ℃, the time is 4-5 minutes, and the mold clamping force is 2 MPa. Finally, the embodiment of the invention can be naturally cooled, and the obtained standard sample is placed in a constant temperature and humidity machine and stored under the conditions of constant temperature and humidity (20 +/-2 ℃ and 50 +/-5% rh), thereby being convenient for subsequent test and application.

The standard sample prepared by the invention is shown in fig. 4, wherein the part (i) is the cord yarn sample after sizing, and the part (ii) is the part for adding sizing material. Specifically, the thickness of the sizing materials on both sides of the semi-vulcanized cord yarn sample is 1-1.2mm, and preferably 1.1 mm. According to the embodiment of the invention, by adopting the novel rubber composition and combining means such as an optimized manufacturing process, the prepared standard sample viscosity data is stable, and the method is beneficial to obtaining relatively accurate viscosity data of the rubber sample through testing.

The invention also provides a test method of the rubber sample, which comprises the following steps:

the standard sample obtained by the preparation method is fixed on a viscous wheel pull-off type viscous machine, the surface viscosity of the rubber semi-product sample to be tested is tested, and the viscosity value of the sample to be tested is a value read by an inductor when the viscous wheel rises.

In the embodiment of the invention, the test instrument used in the test method comprises the following steps: TOYOSEIKI P-3 viscosity verifier, operating according to the instrument specifications. The tack test conditions mainly include: the pressing time of the adhesive wheel and the sample to be detected is 3-5 seconds, preferably 3 seconds, and the pressure is 5N. All other rubber semi-products can be subjected to viscosity test with the standard sample prepared by the invention, and the standard sample has higher stability on the viscosity of the same rubber under the condition of small environmental difference through a large amount of data analysis, so that developers can correctly master the viscosity condition of each semi-product, further the formula development period is shortened, and the development cost is reduced.

For further understanding of the present application, the standard sample preparation method and rubber sample testing method for rubber tack testing provided herein are specifically described below with reference to examples. It should be understood, however, that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the following examples.

The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by manufacturers, and are all conventional products available on the market.

Example 1

A raw yarn (PET, full-name polyethylene terephthalate, also called polyester resin) of 1500D/2/25.5 is adopted, the same first sizing material (formula is shown in table 1) as the original standard sample is used, and after sizing and EBR irradiation by a sizing machine, a cord yarn sample of 12 mm by 200mm is cut, and the thickness is 1 mm.

The second sizing material (standard Mooney viscosity is 55 +/-2 degrees) in the table 1 is adopted, the second sizing material is stuck to two sides of the cord yarn sample, after the two sides of the cord yarn sample are wrapped by high-temperature PE, the high-temperature PE is used for semi-vulcanization by a flat vulcanizing machine (the semi-vulcanization condition is 110 ℃, the time is 4 minutes, the mold clamping force is 2MPa, the thickness of the sizing material on the two sides is 1.1mm), and finally, the prepared standard sample is naturally cooled and placed in an angry temperature 24864 wet machine (the condition is 20 +/-2 ℃, the humidity is 50 +/-5 percent rh) for standby application.

In addition, a 1000D/2/24 base yarn was sized using a primary size, EBR irradiated, and cut to obtain a comparative sample.

Table 1 formulation of the compounds used in the examples of the invention

Note:

the specification of the cord fabric is 1000D/2/24 and 1500D/2/25.5, and the manufacturers are all Yado industry (Suzhou) limited company;

the natural rubber 3# is RSS #3, and the manufacturer is a high and deep company;

butadiene rubber is BR9000, a producer is Yangzi petrochemical company;

the natural RUBBER No. 10 is SVR-10, and the manufacturer is PHU RIENG RUBBER;

the carbon black is SAF (super high resistance, constant elongation, medium and super wear resistance furnace black), and the manufacturer is Shanghai Kabot corporation;

white carbon black is 1165MP, and the manufacturer is Solvay fine chemical company;

TDAE is environment-friendly aromatic oil VIVATEC 500, and the manufacturer is H & R GROUP;

the tackifying resin is ESCOREZ 1102, and the manufacturer is Shanghai Kingson company;

inorganic active agent ZnO, the manufacturer is Luchang chemical company;

stearic acid octadecanoic acid SA, manufactured by Fengyi grease;

the aging preventing agent is 6PPD rubber antioxidant;

microcrystalline paraffin RD, as a product of Shunhua chemical engineering Co., Ltd; RD: the mixture of microcrystalline paraffin and solid alkane has a molecular formula of C_nH_2n+2(n is 20-50), a protective film can be formed on the surface of the rubber product, so that the damage of ozone to the rubber product can be effectively shielded;

the processing aid is aktiplast PP, and the manufacturer is Rhine chemical company; aktiplast PP: the mixture of the Chinese name unsaturated fatty acid zinc soap and the dispersing agent can improve the dispersibility and the fluidity and improve the extrusion rate and the dimensional stability of the sizing material;

the protective wax is okerin 2122H, and the manufacturer is parameter (Suzhou);

the sulfur is SS200-5, and the manufacturer is Jinghai chemical company;

the promoter was CBS, manufactured by Shandong Shunhun chemical Co;

the scorch retarder is CTP.

Example 2

The standard sample obtained in example 1 was fixed to a tack roller pull-off type tack machine, and the surface tack of the rubber semi-finished product sample to be tested was measured, and the tack value of the sample to be tested was the value read by the sensor when the tack roller was lifted.

Testing an instrument: the TOYOSEIKI P-3 viscosity verifier is schematically shown in FIGS. 1 and 2.

Conditions for tack testing:

lowering speed of the viscous wheel: 50 mm/min;

and (3) pressing the adhesive wheel and the sample to be detected: 3 seconds;

pressure: 5N;

the viscosity value is read by a sensor when the viscosity wheel rises and has the unit of N.s/m²。

The results of the test for the difference in the viscosity of the original standard sample are shown in FIG. 5, and the results of the test for the difference in the viscosity of the standard sample of the present invention are shown in FIG. 6. In fig. 5 and 6, the abscissa is time, the test is continued for 10 days, the same batch of standard samples and the same batch of rubber compound are used for each test, the test is performed by working into semi-finished products every day, and the test data n is 50.

The rubber industry has no uniform standard for viscosity, and under the same condition, each test can only measure a relative value by comparison. When the sample viscosity is measured by the method, the data is stable, and can be set as a standard value, and the range is set as 3 times of standard deviation (3 delta)_{Original one has})。

The standard deviation (delta), delta, was calculated from FIG. 5 "original Standard sample test viscosity Difference results_{Original one has}: 2.192, 2.806, 2.117, 1.7740, 1.821, 2.211, 2.308, 2.637, 0.986, 1.346; the mean standard deviation was 2.016. The criteria may be: original average value of + -3 delta_{Original one has}。

Standard deviation (. delta.) measured by the "inventive Standard specimen test viscosity Difference results" in FIG. 6_{The invention})，δ_{The invention}: 1.001, 1.505, 1.106, 1.364, 0.898, 1.206, 1.274, 0.784, 0.869, 1.159; the mean standard deviation was 1.117. The criteria may be: mean value of the invention. + -. 3. delta_{Original one has}。

And (4) conclusion: according to the comparison, when the traditional sample is used for testing viscosity, the variation of the test data is large at the same time, and the test difference is large at different times; the standard sample test of the invention has the advantages of small dispersion degree of the measured viscosity value, good stability of the displayed viscosity data, small difference of the test data, small difference of the data tested at different time, and more trend to the standard accuracy and the data stability.

Example 3

Other test formulations (same batch test formulations) of the second compound were also performed, see test 1, test 2 and test 3 in the following table, but the effect was less than that of example 1 and the best effect of example 1 was obtained.

Table 2 formulation of the compounds used in the examples of the invention

In the embodiment of the invention, 1500D/2/25.5 raw yarn is adopted, the same sizing material as the original standard sample is firstly used, rubberized by a rubberizing machine and subjected to EBR irradiation, a curtain yarn sample with the size of 12 x 200mm is cut, a novel rubber composition (with the standard Mooney viscosity of 55 +/-2 ℃) is stuck to two sides of the curtain yarn sample, and finally, a flat vulcanizing machine is used for semi-vulcanizing to obtain the optimized standard sample. The standard sample prepared by the method has stable viscosity data, can be used for viscosity test with other rubber semi-products, has higher stability (under the condition of small environmental difference) for the same rubber viscosity, and allows developers to obtain relatively accurate viscosity data.

The above description is only a preferred embodiment of the present invention, and it should be noted that various modifications to these embodiments can be implemented by those skilled in the art without departing from the technical principle of the present invention, and these modifications should be construed as the scope of the present invention.