๐“๐จ๐๐š๐ฒ'๐ฌ ๐Š๐๐Ž๐–๐‹๐„๐ƒ๐†๐„ ๐’๐ก๐š๐ซ๐ž : ๐†๐ซ๐ž๐ž๐ง ๐’๐ญ๐ซ๐ž๐ง๐ ๐ญ๐ก ๐š๐ง๐ ๐ˆ๐ญ๐ฌ ๐ˆ๐ฆ๐ฉ๐š๐œ๐ญ ๐จ๐ง ๐“๐ข๐ซ๐ž ๐๐ฎ๐š๐ฅ๐ข๐ญ๐ฒ

๐“๐จ๐๐š๐ฒ'๐ฌ ๐Š๐๐Ž๐–๐‹๐„๐ƒ๐†๐„ ๐’๐ก๐š๐ซ๐ž

๐†๐ซ๐ž๐ž๐ง ๐’๐ญ๐ซ๐ž๐ง๐ ๐ญ๐ก ๐š๐ง๐ ๐ˆ๐ญ๐ฌ ๐ˆ๐ฆ๐ฉ๐š๐œ๐ญ ๐จ๐ง ๐“๐ข๐ซ๐ž ๐๐ฎ๐š๐ฅ๐ข๐ญ๐ฒ

Green strength is the resistance to deformation of a rubber stock in the uncured state. It is a critical property for maintaining the shape of the green tire before curing.

Normally, natural rubber imparts good green strength to a rubber compound because NR tends to crystallize when stretched. One common reason for low green strength in NR compounds is excessive mastication during mixing, which breaks down the molecular weight and reduces chain entanglements.


Electron beam (EB) treatment is often used to enhance the green strength of NR/SBR blends in tire carcass compounds, and it has also been reported to improve the green strength of bromobutyl rubber. Additionally, using high–green-strength barrier layers helps minimize gauge distortion during tire building.


Storage and Handling of Green Tires


To prevent deformation of green tires, which can lead to permanent defects in the cured product, the following practices are essential:


✅๐’๐ญ๐จ๐ซ๐ž ๐ ๐ซ๐ž๐ž๐ง ๐ญ๐ข๐ซ๐ž๐ฌ ๐จ๐ง ๐ฉ๐ซ๐จ๐ฉ๐ž๐ซ ๐ซ๐š๐œ๐ค๐ฌ.

✅๐ƒ๐จ ๐ง๐จ๐ญ ๐ฌ๐ญ๐š๐œ๐ค ๐ ๐ซ๐ž๐ž๐ง ๐ญ๐ข๐ซ๐ž๐ฌ ๐จ๐ง ๐ญ๐จ๐ฉ ๐จ๐Ÿ ๐ž๐š๐œ๐ก ๐จ๐ญ๐ก๐ž๐ซ.

✅๐Š๐ž๐ž๐ฉ ๐ฆ๐ข๐ง๐ข๐ฆ๐ฎ๐ฆ ๐ฌ๐ญ๐จ๐œ๐ค ๐ญ๐จ ๐ซ๐ž๐๐ฎ๐œ๐ž ๐ฌ๐ญ๐จ๐ซ๐š๐ ๐ž ๐ญ๐ข๐ฆ๐ž ๐š๐ง๐ ๐๐ž๐Ÿ๐จ๐ซ๐ฆ๐š๐ญ๐ข๐จ๐ง ๐ซ๐ข๐ฌ๐ค.

✅๐‚๐จ๐ง๐ญ๐ซ๐จ๐ฅ ๐ญ๐ก๐ž ๐ฌ๐ญ๐จ๐ซ๐š๐ ๐ž ๐ญ๐ž๐ฆ๐ฉ๐ž๐ซ๐š๐ญ๐ฎ๐ซ๐ž ๐จ๐Ÿ ๐ ๐ซ๐ž๐ž๐ง ๐ญ๐ข๐ซ๐ž๐ฌ. ๐“๐ก๐ž ๐ซ๐จ๐จ๐ฆ ๐ญ๐ž๐ฆ๐ฉ๐ž๐ซ๐š๐ญ๐ฎ๐ซ๐ž ๐ฆ๐ฎ๐ฌ๐ญ ๐›๐ž ๐ค๐ž๐ฉ๐ญ ๐ฌ๐ฎ๐Ÿ๐Ÿ๐ข๐œ๐ข๐ž๐ง๐ญ๐ฅ๐ฒ ๐ฅ๐จ๐ฐ ๐ญ๐จ ๐ฉ๐ซ๐ž๐ฏ๐ž๐ง๐ญ ๐๐ž๐Ÿ๐จ๐ซ๐ฆ๐š๐ญ๐ข๐จ๐ง.

✅๐‡๐š๐ง๐๐ฅ๐ž ๐ญ๐ข๐ซ๐ž๐ฌ ๐ ๐ž๐ง๐ญ๐ฅ๐ฒ ๐ญ๐จ ๐ฆ๐š๐ข๐ง๐ญ๐š๐ข๐ง ๐ญ๐ก๐ž ๐๐ž๐ฌ๐ข๐ ๐ง๐ž๐ ๐ฉ๐ซ๐จ๐Ÿ๐ข๐ฅ๐ž ๐š๐ง๐ ๐๐ข๐ฆ๐ž๐ง๐ฌ๐ข๐จ๐ง๐ฌ.

✅๐”๐ฌ๐ž ๐ ๐ซ๐ž๐ž๐ง ๐ญ๐ข๐ซ๐ž๐ฌ ๐จ๐ง ๐š ๐…๐ˆ๐…๐Ž (๐Ÿ๐ข๐ซ๐ฌ๐ญ ๐ข๐ง, ๐Ÿ๐ข๐ซ๐ฌ๐ญ ๐จ๐ฎ๐ญ) ๐›๐š๐ฌ๐ข๐ฌ.


source : Ahmed Awad


Comments

Post a Comment

Popular posts from this blog

Today's KNOWLEDGE Share : Robotic 3D printing can compete with traditional boatbuilding

Image
Today's KNOWLEDGE Share “Robotic 3D printing can compete with traditional boatbuilding”, Simone Barbera and Mattia De Santis, Caracol V2 catamaran was printed in Italy at Caracol’s production center and headquarter in Barlassina, near Milan, with a Heron AM 400, Caracol’s robotic Large Format Additive Manufacturing (LFAM) platform. The lattest was specifically configured with a 7-axis robotic arm mounted on a rail, enabling the printing of parts up to 10 meters in length. How did the collaboration between V2 Group and Caracol come about? Simone Barbera : The collaboration between V2 Group and Caracol originated from a shared vision to revolutionize boat manufacturing through sustainable innovation. V2 Group, a Spanish-company specialized in nautical design and engineering, is seeking to develop electric vessels manufactured sustainably. On the other hand, Caracol, leader in robotic advanced manufacturing technology, had had years of experience working with Large Format Additive Ma...
Read more

Today's KNOWLEDGE Share : A BUG IN INJECTION MOLDING

Image
Today's KNOWLEDGE Share A bug in injection molding – an injection-molded part in a bug? Neither! Nature and injection molding have reached similar results. Nature created the first micro-gear long before any human engineering existed. One such example is the Issus coleoptratus (shown in the picture). Furthermore, only now are we reaching the point where injection-molded polymer microgears can approach this level of performance. Looking at the images, which one do you think is the natural gear, and which one is the molded version? It is not that easy to tell, right? Their appearance and operating principles are surprisingly similar. Chitin, a natural linear polymer, forms what nature essentially "molds” into shape. In engineering, we rely on advanced technical polymers to produce similar geometry through actual injection molding. They are not the same material, yet they solve the same issue: Stiffness, dimensional stability, and reliable function at a scale where tolerances...
Read more

Lummus Technology announced Vioneo has selected its Novolen®

Image
polypropylene (PP) technology for a new grassroots plant in #Antwerp , Belgium. The plant will be part of Vioneo’s complex that, once complete, will be the world’s first industrial scale fossilfree plastics production complex. The complex, based on green methanol as feedstock, will also be highly electrified using renewableelectricity and use renewable hydrogen as key components to its operations. The first-of-its-kind plant will have a capacity of 200 kta and will use 100pc segregated green #propylene and #ethylene as feedstock to produce a wide range of #PP grades. With high-purity feedstock and proven technology, PP will serve as a direct drop-in replacement for fossil-based alternatives. The plastics produced will be fully traceable and #CO2negative , allowing customers to reduce their #Scope3 #emissions . Earlier this year, Vioneo and Honeywell announced that Honeywell’s advanced (methanol-to-olefin MTO) technology will be used by Vioneo to produce greenolefins for the comple...
Read more