When using reclaimed rubber to produce rubber products, a variety of process operation aids are required, such as plasticizers, plasticizers, homogenizers, dispersants, release agents, release agents, anti-scorching agents, etc. Rubber release agents and release agents can reduce production interruptions and additional processing time caused by adhesion in the production of some recycled rubber products, and improve production efficiency; Make the surface of the product smoother, reduce the scratches, defects and other problems on the surface of the product, and improve the appearance quality of the product.
1. Definition of rubber release agent and release agent
The release agent is a substance that prevents the adhesion of semi-finished products processed by rubber, and the release agent is a substance that can improve the release performance of rubber after vulcanization. When using reclaimed rubber to produce rubber products, the use of release agent and release agent E4LYY823 can reduce the internal friction among rubber molecular chains or the external friction among rubber and mold, so that the materials in the processing process have good operability, and the vulcanized products have good release property to ensure that the surface of recycled rubber products has a good finish.
2. Classification and common varieties of rubber release agents and release agents
According to the chemical composition and structure of the compounding agent, it can be divided into three types of release agents: inorganic, organic and polymer.
(1) Inorganic is mainly used to prevent the surface of film and semi-finished products from sticking to each other, and is often used in the plasticizing, mixing, tableting and molding processes of rubber, mainly playing the role of isolation, that is, is, the separator; The commonly used separators in the production of recycled rubber products include talcum powder, mica powder, etc. Inorganic separators are chemically inactive, with lubricity, acid and alkali resistance, fire resistance and insulation.
(2) Organic products mainly include fatty acid soap, paraffin, petroleum jelly, etc., which can be soluble in water are usually made into aqueous solutions as a separator, and those that cannot be dissolved in water are usually used as release agents. Polymers mainly include silicone oil, polyethylene glycol, low molecular weight polyethylene, etc., which are used as release agents, and silicone-free polymers can be used as release agents. The above two types of compounding agents are mainly used as release agents in the production of recycled rubber products, and are often used in molding and vulcanization processes.
3. Requirements for release agent for recycled rubber products
When recycled rubber products need to use a release agent, the release agent used is required to have good thermal stability and chemical inertness, do not corrode the mold surface, do not leave decomposition products, do not affect the color and performance of the product, do not produce gas, and are non-toxic.
4. Precautions for the use of release agents and release agents for recycled rubber products
The separator can be applied in the form of aqueous solution, emulsifier or paste on the surface of film, water tire and fetal embryo; The release agent is generally brushed or sprayed on the surface of the model; Silicone oil or silicone rubber can be used as an organic solution. When using release agents and release agents for recycled rubber products, the following three points need to be noted:
(1) The release agent and release agent should be dried after brushing or spraying, if it cannot be completely dried, the surface of the rubber product will produce bubbles or heavy skin and scars, which will affect the appearance of the product.
(2) When the release agent is used, it is necessary to remove the rust, oil, carbon particles and organic impurities on the surface of the mold first, so that the surface of the mold is highly clean, and then brush or spray the release agent, and the release agent is good.
(3) The release agent contains an organic solution, and it is necessary to keep it away from the fire source and pay attention to ventilation during operation.
When using reclaimed rubber to produce different varieties of rubber products, it is necessary to select the appropriate release agent and release agent according to the needs of process operation.
Exclusive original article [commercial authorization] reprint, excerpt and excerpt in any form are prohibited without written authorization. Focus on Hongyun rubber: learn the process formula and raw material technology of producing rubber products from recycled rubber to help you reduce costs and increase profits