Rubber Products Appearance Quality

Rubber products in vulcanization, the bubble is the rubber products vulcanization often appear quality defects, not only affect the appearance of the product quality, even affect the intrinsic quality of products. By observing and analyzing the causes of the bubbles in the vulcanization, the measures to solve the problem were formulated, which minimized the occurrence of bubble phenomenon and improved the appearance quality of the products.

Rubber Products vulcanized product bubble factors are manifold, the key reasons are raw materials, rubber mixing process, process operation, vulcanization equipment and molds and other factors.

(1) Natural rubber water and volatile excess standards

(2) Chemical raw materials and additives storage, ingredients, such as moisture content increase.

(3) The wire cord is damp and the coated steel wire mortar is not dry.

(4) The fiber cord moisture regain rate is high, the original line is higher than 2%, the pressure extends before above 1%.

(1) Natural rubber after cutting glue to take the drying measures, according to the standard control of moisture and volatile, strictly prohibited, reduce the moisture content of the original gum.

(2) Chemical raw materials and auxiliaries to increase moisture-proof measures, in the Meiyu season and rainy, foggy weather, especially to help transport, warehousing, processing and other links, to avoid raw materials damp, wet. Well-matched ingredients are used in plastic.

(3) Steel cord in the use of 1 hours before the opening of packaging, to maintain indoor humidity is not exceeded, to avoid the wire cord damp, steel wire coated with mortar after drying.

(4) The fiber cord is heated and dried before rolling, and the moisture regain rate is lower than 1% before the line is rolled into the calender

(1) The mixing agent in the mixed mixing process is unevenly dispersed.

(2) The mixing temperature is low, the moisture is not clear, the temperature is high when the glue is added sulphur in the open refining machine, the sulphur is easy to melt, or coke burns.

(3) The plastic material parking time is insufficient or has not parked on the production use.

(4) The rubber material is uneven, the surface is not smooth

(5) The rubber material in the open refining machine hot smelting, the surface wraps the air, the type rubber material has the phenomenon which harbours the air.

(1) To optimize the production formula, the use of easily dispersed auxiliaries to replace the existing auxiliaries, to increase the dispersant, uniform agents, Rubber Products such as the application of processing aids, improve the dispersion of various additives.

(2) The mixing rubber is produced by means of a two-section mixer, a period of mixing to improve the temperature, so that the raw materials in the moisture and volatile parts of the full volatile, plastic after parking to carry out two-stage mixing, temperature control in addition to sulfur and promoter temperature range, to avoid coke burning time short or coke burning.

(3) Plastic refining, a section of mixing, Rubber Products two-section mixing, out of the process of strict control of the parking time of semi-finished products. Allow all kinds of additives to diffuse fully, improve the uniformity of the compound, and at the same time, the mechanical action of stress and strain recovery.

(4) The rubber material heat to be evenly, through the cutting knife, the drop plate, the ramming glue and so on the operation makes the compound mixing evenly.Rubber Products The smooth degree of the surface of the plastic material is improved by using the method of separating the heat supply and the type.

(5) The use of extrusion process extrusion rubber material, the surface of the type of rubber no longer harboring air phenomenon.