Use of reactive film adhesives
Reactive film adhesives are actually one of the important support materials and are widely used in packaging operations. Adhesives are viscous substances that can join two different materials together due to their adhesive properties. There are many kinds of adhesives. In fact, it is a general term for various stressed materials that combine or bond the same or different materials.
reactive film adhesiveIn fact, it is one of the important support materials and is widely used in packaging operations. Adhesives are viscous substances that can join two different materials together due to their adhesive properties. There are many kinds of adhesives. In fact, it is a general term for various stressed materials that combine or bond the same or different materials. There are mainly three types of liquid, paste and solid. When using this product, its function is to connect the two devices together through the connection method, and the connection force of the interface is large enough. You may have noticed that in many fields, reactive film adhesives can replace mechanical connections such as welding, riveting, and bolts. Adhesives and bonding technologies are widely used in transportation, instrumentation, electronic equipment, textiles, construction, wood processing, Medical equipment, machinery manufacturing. areas such as daily needs.
Reactive film adhesives are obtained from substances found in nature. Including starch, protein, dextrin, animal glue, shellac, leather glue, resin and other biological adhesives; reactive film adhesives also include asphalt and other mineral binders. Production, mainly water, raw starch, cooked paste, caustic soda, borax and formaldehyde mixture. The approximate proportion is: water 80%; Starch 20% (raw starch 85%, cooked starch 15%); Caustic soda (total starch) 2.4-2.8; Borax (total starch) 2.7-3.2, about 10 moles; Trace formaldehyde. In addition, some plants use specially treated corn starch to produce a single viscosity adhesive. The other gelatinization points started at 61°C and ended at 63°C. Although the gel point is low, the gel speed is very fast when gluing, just like the ordinary double-sided machine paste. The viscosity is typically between 27 and 32 seconds. 680 gallons of paste used 500kg of starch. Or after the reactive film adhesive is stirred in water at room temperature, its particles will be dispersed into the milk, but will not dissolve or absorb water. If stirring is stopped, the starch will sink to the bottom and gradually form a hard mass. Once hard lumps are formed, they will not fall apart easily.
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