Engineering Rubber and Plastics in Use

  Silicone Curing: Types, What to Choose according to your Industry? In Silicone Rubbe r chemistry majorly 5 types of curing happen Addition Curing using Platinum Catalyst Free Radical Curing using peroxide Condensation Curing using Tin like Catalyst Moisture Curing using Acetoxy, Alkoxy etc. UV Curing using UV Light In this article we will explain the benefits of each curing system and how it helps on selecting the product for different applications. Our Major Focus area will be Platinum based , Peroxide based Curing which is majorly used in the fabrication of silicone rubber. Platinum catalyst based curing is chemical reaction used by Hydrosilylation where vinyl groups in the rubber and silane hydrides react in presence of platinum catalyst to do cross linking. Si–H + CH₂=CH–Si —Pt→ Si–CH₂–CH₂–Si The hydride molecule will connect many vinyl-silicone chains in the presence of platinum, causing an addition reaction, the major factors contribute the reaction is the hydride, v...

  Composite materials are manufactured by different methods like hand layup, spray up, Vacuum bagging, resin infusion, prepreg layup, Autoclave moulding, filament winding, pultrusion etc. We will be explaining: ·        Rubber type ·        Temperature ·        Adhesion(Peel Strength, Lap Shear Strength) ·        Penetration ·        Uniform Size Consistency ·        Shelf Life ·        Removal after the process ·        Solid Content These are the main Characteristics for the Tape that play a role in the process of sealing vacuum.   Wherever a vacuum comes to play there you require a seal to arrest the movement of air. In vacuum bagging, Prepreg Lay-up, Autoclave moulding, Resin infusion/VARTM vacuum these tapes are...

This article covers all the features of Silicone Rubber which makes us helps, to understand why silicone chosen over as a best solution for silicone tubes in various industries. All the different properties have been explained scientifically and why it is chosen over different purpose has been clearly mentioned over, the technical data will be updated over periodically and separate technical sheets have been linked for a complete identification. For a better understanding and simplification of the inside chemicals we can compare silicone and glass, both are like relatives with Silica as a common ingredient Molecular structure of glass is Rigid 3 D structure with oxygen linked all sides making it hard with a very high bond energy, whereas silicone is a 2 D flexible organic group with organic( C and H) in the sides making it flexible . This itself explains the non-reactive nature of glass whereas the reactive vulnerability of silicone after a certain temperature and chemical degr...

  Aramid yarns known by the brand name Kevlar yarn from Dupont is a high-performance yarn which can sustain temperatures in the range of 250 degree Celsius, as it was initially developed by Dupont their brand name became pretty popular in the name Kevlar although its chemical name is Poly-para-phenylene terephthalamide. Para-Aramid fibres are produced by a two-step process - polymer production followed by spinning. The first step is the low-temperature-solution polymerization of diacid chlorides (e.g. terephthaloyl chloride) and diamines (e.g. para-phenylenediamine) in amide solvents. Polar solvents such as N-methyl pyrrolidone and dimethylacetamide are used as polymerization solvents; formerly, hexamethyl phosphoramide was used. The para-aramid polymer is neutralized and then isolated from the polymerization solution. Next, a 'spinning solution' is created by redissolving the polymer in concentrated sulfuric acid. This liquid crystalline solution is extruded through a spinnere...

  Why Butyl Tape is essential in PEB, Metal Buildings? Pre engineered Buildings, Metal Building systems, Steel structures are the revolution that happened in the last two decades in the building industry. Buildings are constructed in a short span of time with increased efficiency and short time. The challenges these buildings pose is the space or gaps created by the sheets, panels, gaps due to expansion or contraction and the general clearances between metal systems. Here Comes the roll of  Butyl Tapes  specially designed for PEB, Metal Buildings to seal and fill the joints, seams, lapping areas, Metal to concrete areas.  Butyl tapes  also known as  Bead mastics  has been manufactured by Centroid for the past 7 years and has been continuously improved from its properties to packing based on customer feedbacks and inputs. This is a four-part article where we will discuss the ·       Design and Manufacturing · ...