Methods for Using and Storing SBR Composite Rubber

Release time:

2020-06-16

Methods for Using and Storing SBR Composite Rubber

　　1. SBR composite rubber Suitable for ethyl acetate and acetone. The water content in the solvent must not exceed 300 PPM. Aromatic hydrocarbons, toluene, and alcohols are unsuitable as solvents.

　　2. Dilution method for SBR compound rubber: The solvent must be added to the main agent according to the desired solid content. After stirring, the curing agent must be added to the diluted main agent and thoroughly mixed.

　　3. Shelf Life: The shelf life of the prepared SBR composite adhesive depends on the solid content of the adhesive, the storage temperature, and the water content in the diluent. Typically, the prepared adhesive, stored in a sealed container, can be used for about 1–2 days without any noticeable increase in viscosity. Adhesives that have exceeded their shelf life or old adhesives remaining in rubber buckets can adversely affect the quality of the composite products.

SBR composite rubber

　　4. Coating: A dry laminator suitable for use with any smooth roller and anilox roller.

　　5. SBR composite rubber Coating Weight: To meet the varying requirements of composite products in terms of their intended use and material composition, the dry-basis coating weight can be selected within the range of 2–6 g/m². For composite films that require thermal processing or deep-forming operations, the adhesive coating weight should be relatively higher; otherwise, it should be relatively lower. Accordingly, adjust the coating weight of the printing film.

　　6. Working Concentration: The working concentration should be determined based on the concentration of the coating roller. The higher the concentration, the better the economic efficiency. It is generally recommended to choose a concentration between 25% and 40%.

　　7. Drying: To ensure complete evaporation of the solvent from the film coated with adhesive, it is essential to pay attention to adequate air volume, wind speed, and temperature. For example, when the drying system is divided into three sections, the temperature gradient from the film’s inlet to outlet should be controlled within the range of 50–60 to 70–80 or 60–80–90.

　　8. SBR composite rubber Bonding temperature: Depending on the properties and quality of the composite substrate, the temperature should be as high as possible, generally controlled within the range of 50–90°C. For temperature-sensitive films, the temperature should be set at 50–60°C; for other films, it can be set at 70–80°C.

　　9. Composite pressure: The composite pressure should be increased as much as possible, but without damaging the film.

　　10. Curing: After composite processing, the bond strength between the main agent and the curing agent is not high. The product needs to be sent to a curing room for 24–48 hours; note that the working environment differs between winter and summer. Before rewinding or manufacturing a three-layer composite film, the preliminarily laminated composite film should be allowed to cure for at least one day whenever possible.

　　11. Remaining adhesive: Do not use continuously for more than 8 hours, or if it becomes white and cloudy, semi-transparent, or viscous.

　　 SBR composite rubber Storage:

　　Store in an unopened, properly sealed container in a dark, dry place for up to 8 months; once opened, use promptly within a short period of time.

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