CN110591237A - EPDM (ethylene-propylene-diene monomer) for environment-friendly self-lubricating wire harness sheath and preparation method thereof - Google Patents

Abstract

The invention discloses an EPDM (ethylene-propylene-diene monomer) for an environment-friendly self-lubricating wire harness sheath, which consists of the following components in percentage by weight: ethylene propylene diene monomer 27.2-40.1%; 38.6 to 44.0 percent of carbon black; 12.3 to 18.8 percent of softening plasticizer; 2.1 to 2.8 percent of active agent; 2.9 to 5.1 percent of self-lubricating additive; 2.5 to 3.3 percent of vulcanizing agent. The invention relates to an environment-friendly wire harness sheath EPDM rubber material with excellent physical and mechanical properties and extremely low friction coefficient.

Description

EPDM (ethylene-propylene-diene monomer) for environment-friendly self-lubricating wire harness sheath and preparation method thereof

Technical Field

The invention belongs to the field of rubber, and particularly relates to EPDM for an environment-friendly self-lubricating wire harness sheath and a preparation method thereof.

Background

Because the friction factor of rubber materials is large, the rubber products are often coated with lubricant when in use, and therefore, the phenomena of lubricant loss and pollution are often generated when the machine operates. For this reason, the following method is employed to reduce the friction factor of the rubber sealing article: 1. surface modification, including surface recombination, surface coating and surface treatment; 2. matching oil, wherein the oil is sprayed out of the rubber product; 3. adding a solid lubricant. Wherein, the surface compounding method not only has complicated process, but also can not fully exert the inherent characteristics of the rubber material; rubber products with surface coating and surface treatment are easy to wear and have poor durability when used for dynamic sealing; oil squirting in oil compounding has caused other fitting contamination problems, and therefore in recent years great attention has been given to the use of solid lubricants, particularly solid lubricants cured in rubber compounds, to reduce the friction factor of rubber sealing articles.

In recent years, the environmental protection and energy conservation problems of the rubber industry in China are more and more stressed, the rubber environmental protection specifications and laws and regulations established by developed countries such as Europe and America along with the deep development of China and the development of economy form green barriers to products in China, the rubber industry is an industry with large energy consumption, and the rubber industry is in shortage with the increasing trend of energy, has potential crisis, and has the problem of further strengthening the energy conservation and environmental protection. Meanwhile, in order to protect the health of operators and reduce the damage of rubber products to the environment, the environmental protection in production needs to be enhanced. In addition, the rubber product is applied to the related field and has influence on the related field, and the improvement of the technical level of the production of the rubber product is also a contribution to environmental protection.

Therefore, in order to continuously meet the requirements of customers and protect the health of operators, the development of an environment-friendly wire harness sheath EPDM rubber material with excellent mechanical properties and extremely low friction coefficient is required.

Disclosure of Invention

Aiming at the problems, the invention provides the EPDM for the environment-friendly self-lubricating wire harness sheath, which has excellent physical and mechanical properties, extremely low friction coefficient and no N-nitrosamine generated in the production process.

In order to achieve the purpose, the technical scheme of the invention is as follows: the EPDM for the environment-friendly self-lubricating wire harness sheath comprises the following components in percentage by weight:

preferably, the EPDM for the environment-friendly self-lubricating wire harness sheath is composed of the following components in percentage by weight:

preferably, the ethylene propylene diene monomer is KEP 980.

Preferably, the carbon black is boao N550.

Preferably, the softening plasticizer is MP100H from meid.

Preferably, the self-lubricating additive is ARMOSLIP CP-P of PMC

Preferably, the vulcanizing agent is an environmentally friendly vulcanizing agent of knox, suzhou.

Preferably, the ratio of carbon black to ethylene propylene diene monomer is at least 0.96: 1.62. Thus, the processing technology performance can be improved on the basis of ensuring that the rubber meets the performance.

The invention also provides a preparation method of the EPDM for the environment-friendly self-lubricating wire harness sheath, which sequentially comprises the following steps:

(1) preparing materials: respectively weighing the ethylene propylene diene monomer, the carbon black, the softening plasticizer, the activator and the self-lubricating additive according to the proportion, mixing to form a mixture A, and weighing the vulcanizing agent to form a mixture B;

(2) first mixing: adding the ingredient A into an internal mixer for mixing for 60-90 seconds, then lifting a hammer for cleaning, then pressing and hammer mixing for 60-90 seconds, again lifting the hammer for cleaning, at the temperature of 140-150 ℃, then pressing and hammer mixing for 120-180 seconds, discharging, at the temperature of 150-170 ℃, feeding the mixture onto a cutting machine, and discharging to obtain a mixed rubber A;

(3) and (3) second mixing: and (3) putting the rubber compound A and the ingredient B prepared in the first mixing into an internal mixer for mixing for 30-40 seconds, then continuously mixing for 30-50 seconds after cleaning, then discharging to a cutting machine, and discharging to finish the preparation.

In the steps (2) and (3), the mixing is carried out in stages, the mixing temperature is ensured, and the volatilization of low molecular substances and the processing safety can be ensured.

The invention selects the KEP980 rubber as the main material of the rubber material, has high Mooney viscosity and high ethylene content, ensures that the physical and mechanical properties of the rubber material are good, and ensures that the raw rubber is oil-extended and the processability of the rubber material is better; carbon black N550 is adopted in the formula, so that the requirements of the performance and the processing technology of the rubber are met; the addition of the softening plasticizer MP100H firstly ensures that the dynamic performance of the rubber is not reduced, and simultaneously improves the processability and the excellent aging resistance of the rubber; the use of the self-lubricating additive ARMOSLIP CP-P ensures the good self-lubricating property of the rubber; the use of the environment-friendly vulcanizing agent ensures the appearance, good physical and mechanical properties and environmental protection requirements of the rubber product.

The invention has excellent physical and mechanical properties and extremely low friction coefficient, and is suitable for being used as an environment-friendly wire harness sheath EPDM rubber material.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 EPDM for the environment-friendly self-lubricating wire harness sheath comprises the following components in percentage by weight:

examples

The production of the EPDM for the environment-friendly self-lubricating wire harness sheath of the embodiment 1-6 is carried out according to the component proportion in the table 1.

The EPDM for the environment-friendly self-lubricating wire harness sheath is manufactured according to the following steps:

(1) preparing materials: respectively weighing ethylene propylene diene monomer, carbon black, a softening plasticizer, an activator and a self-lubricating additive according to the components and the proportion in the table 1, mixing to form a component A, and weighing a vulcanizing agent to form a component B;

(2) first mixing: adding the ingredient A into an internal mixer for mixing for 60-90 seconds, then lifting a hammer for cleaning, then pressing and hammer mixing for 60-90 seconds, again lifting the hammer for cleaning (at the temperature of 140-150 ℃), then pressing and hammer mixing for 120-180 seconds, discharging (at the temperature of 150-170 ℃) to a cutting machine, and discharging to obtain a mixed rubber A;

(3) and (3) second mixing: and (3) putting the rubber compound A and the ingredient B prepared in the first mixing into an internal mixer for mixing for 30-40 seconds, then continuously mixing for 30-50 seconds after cleaning, then discharging to a cutting machine, and discharging to finish the preparation.

TABLE 1 weight percentages of the ingredients of examples 1-6

In table 1, the epdm is KEP 980.

The carbon black is boao's N550.

The softening plasticizer was Md MP 100H.

The self-lubricating additive is ARMOSLIP CP-P of PMC.

The vulcanizing agent is an environment-friendly vulcanizing agent of Suzhou Sinuos.

TABLE 2 mixing time for examples 1 to 6

Table 3 results of testing physical Properties of rubber articles of examples 1 to 6

As can be seen from Table 3, the rubber products of the embodiments 1 to 6 of the invention have the characteristics of excellent physical and mechanical properties, high temperature aging resistance and extremely low friction factor, are suitable for various wire harness sheaths and sealing products, and improve the assembly process performance and the friction resistance of the products.

The invention has excellent physical and mechanical properties and extremely low friction coefficient, and is suitable for being used as an environment-friendly wire harness sheath EPDM rubber material.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. The EPDM for the environment-friendly self-lubricating wire harness sheath is characterized in that the EPDM for the environment-friendly self-lubricating wire harness sheath consists of the following components in percentage by weight:

2. the EPDM for the environment-friendly self-lubricating wire harness sheath as recited in claim 1, wherein the crude EPDM rubber is KEP980 of Jinhu.

3. The ethylene propylene diene monomer for EPDM for the environmentally friendly self-lubricating harness sheath according to claim 1, wherein the carbon black is boao N550.

4. The EPDM for the environmentally friendly self-lubricating wire harness sheath of claim 1, wherein the softening plasticizer is MP100H from meide corporation.

5. The EPDM for the environmentally friendly self-lubricating wire harness jacket of claim 1, wherein the self-lubricating coagent is the PMC armosil CP-P.

6. The EPDM for the environmentally friendly self-lubricating wire harness sheath of claim 1, wherein the vulcanizing agent is an environmentally friendly vulcanizing agent of knox, suzhou.

7. The EPDM for the environmentally friendly self-lubricating strand jacket of claim 1, wherein the ratio of carbon black to ethylene propylene diene monomer is at least 0.96: 1.62.

8. A method of making an EPDM for an environmentally friendly self-lubricating harness sheath as claimed in claim 1, the method comprising the steps of, in order:

(1) preparing materials: the proportioning of claim 1, wherein ethylene propylene diene monomer, carbon black, softening plasticizer, activator and self-lubricating additive are respectively weighed and mixed to form a component A, and a vulcanizing agent is weighed to form a component B;

(2) first mixing: adding the ingredient A into an internal mixer for mixing for 60-90 seconds, then lifting a hammer for cleaning, then pressing and hammer mixing for 60-90 seconds, again lifting the hammer for cleaning, at the temperature of 140-150 ℃, then pressing and hammer mixing for 120-180 seconds, discharging, at the temperature of 150-170 ℃, feeding the mixture onto a cutting machine, and discharging to obtain a mixed rubber A;

(3) and (3) second mixing: and (3) putting the rubber compound A and the ingredient B prepared in the first mixing into an internal mixer for mixing for 30-40 seconds, then continuously mixing for 30-50 seconds after cleaning, then discharging to a cutting machine, and discharging to finish the preparation.