Heavy chemical industry equipment, including machinery for the treatment of waste water, contains various types of specialized materials that are resistant to strong acids, bases and various types of organic solvents. Conventional structural metal products, unreinforced thermoplastics and concrete lined tanks are not resistant to chemicals and tend to thermally or mechanically degrade under the influence of extreme operating conditions. The limitations of conventional structural materials and the importance of having the corrosion resistance and the enhanced mechanical properties of composite materials have stimulated intensive research and development in the area of composite material structures. The use of specialty structural composite materials for equipment manufacturing in the process chemical industries ensures that failure of equipment due to the attack of processing media is avoided. The producers of the equipment gain by using components of specialty structural composite materials that provide improved dimensional tolerance and enhanced thermal stability.

Polypropylene Glass Lined Panel System

A unique mechanical and chemical feature of the polypropylene glass lined panel system is the use of a proprietary two-ply composite design. One of the layers of the design is a very high molecular weight polypropylene resin. Of all the polymers, it is one of the most chemically resistant and of all the polymers, it is of the greatest impact resistance. It retains its properties very well over a long time period when in contact with or exposed to aggressive and or corrosive chemicals in several industries. The other layer of the design is created by laminating a special glass fiber fabric backing to the polypropylene resin layer. This PP Glass Lined Sheets backing can be either a calender roll or a hot melt extrusion. A mechanically bonded layer of the glass fiber fabric allows the polymer sheet to be flexible and creates a complete corrosion barrier. It also provides a bridge between the polymer and the rigid structural substrate.

In chemical processing, aggressive chemicals such as concentrated 

Aggressive Organic Solvents quickly deteriorate most industrial metals and plain, unreinforced, concrete. Polypypropylene, glass-backed linings, on the other hand, have good chemical resistance over a broad pH range. Thus, these linings are appropriate for environments containing Acids, Alkalis or Salts. Most metals over time rust and corrode, allowing chemical fluids to permeate through the metal and come in contact with the environment. Polypropylene Glass-Backed linings are inert and nonporous and do not allow fluids to come in contact with the environment. Facilities using good quality polymer glass linings should expect a longer service life of their equipments. Longer service life decreases the probability of unscheduled shutdowns and failures.

Exceptional Thermal Stability and Structural Adhesion

Dual laminate equipment utilizes laminating techniques to bring two dissimilar materials together. This combination of materials may require linings with special attributes, including thermal stability. With the expansion and contraction of temperature and mechanical agitation, linings made of ordinary, unbacked plastic sheets will change dimension, leading to loss of adhesion to the wall of a tank. To thermally stabilize a plastic sheet, a glass fiber back is added. With this back, the sheet can expand and contract with the wall of the tank. This also improves the bond of the sheet to the wall of the tank. This improved adhesion prevents collapse and blistering of linings, which is frequently seen in dual laminate chemical storage tanks and reaction vessels, especially in exhaust scrubbers with extreme temperature differentials and mild vacuum conditions.

Composite polypropylene glass-reinforced sheets contain chemical and pharmaceutical industries

In addition to chemical and pharmaceutical industries and water treatment, composite polypropylene glass-reinforced sheets contain heavy industries to control the movement of process fluids and prevent cross contamination. These sheets can be fabricated to the shape of reaction vessel liners and tanks to contain pickling baths and other hazardous process fluids. Smooth, hard and non-porous composite sheets can be used to prevent cross-contamination and are employed in similar fashion as in pharmaceutical and intermediate synthesis facilities. Composite sheets are employed in nuclear and bio-pharmaceutical synthesis and also in waste water treatment to control cross contamination in treatment and leachate containment. Likewise, composite sheets are used to line acid holding and neutralization tanks to prevent cross-contamination in water and waste water treatment.

Polypropylene lining panels have several advantages 

At various stages in a process. It is easily shaped using a variety of thermoplastic fabrication methods. It is easily workable and lightweight. These characteristics allow fabrication to be done onsite for vessel heads, and ell and tee pieces for rectangular ducts and circular tanks and vessels. Fabrication is done by skilled workers by permanently welding polypropylene sheets by either hot gas extrusion or speed welding. The equipment permanently bonds and seals the polymer, thus creating a leak proof and monolithic joint. Lead and rubber linings are heavier and bulkier than polypropylene lining, thus make panel installation time consuming and expensive due to the heavy lifts required. The use of polypropylene lining sheets eliminates the need for heavy lifts. The other layer of the design is created by laminating a special glass fiber fabric backing to the polypropylene resin layer. This fabric backing can either be hot melt extruded or calender rolled. A mechanically bonded layer of the glass fiber fabric allows the polymer sheet to be flexible and provides a bridge between the polymer and the rigid structural substrate, thus creating a barrier for complete corrosion protection.

Environmental Sustainability and Eco Friendly Life Cycle

In more recent times, composite polymer linings have been utilized for three principal reasons. First, they provide a means to project an organization’s environmental commitment. Second, composite polymer linings serve to mitigate the risk to the environment posed by releases or the potential for releases) of hazardous materials. Third, they fulfill an important organizational need for control of natural resources (particularly the waste generated in production processes. The use of composite polymer linings protects soil and ground water. Composite polymer linings also provide the potential for continuous long-term service (in excess of 30 years). Polypropylene is a thermoplastic polymer, and as such, can be reprocessed to yield new sheets, thus closing the loop. A unique feature of the polypropylene glass lined panel system is the use of a proprietary two-ply composite design. One of the layers is made of a high molecular weight polypropylene resin. It is very resistant to chemicals. When compared to other polymers, it is very resistant to impact damage. It also retains its properties very well over a long period of time, when in contact with aggressive and/or corrosive chemicals that are found in different industries.

Conclusion

PP glass backed lining sheets are key product used by chemical engineers for disposal of hazardous waste and manufacturing of process equipment. PP Glass Lined Sheets Manufacturer possess a unique combination of properties which include excellent chemical resistance, high strength, thermal stability, and light weight. Because of these properties, this material finds application in the energy, pharmaceutical, and water treatment industries. Further, the increasing trends of environmental safety, higher service life of industrial equipment and the need for reduced maintenance costs will drive the development of composite lining materials. Protecting the vital infrastructural facilities of the world will always remain the core of engineering services. This longer service life ensures that equipment will need to be taken out of service less frequently for repair or replacement, which proves to be an economical solution for the vital infrastructural facilities of the world and more environmental friendly.

Frequently Asked Questions (FAQs)

How does the use of a glass fabric back support improve the properties of a polypropylene sheet?

The use of glass fabric backing creates a rough, mechanical surface that allows for a long-lasting and secure bond with the bonding resin on steel, concrete or fibreglass surfaces.

Can these composite lining sheets withstand exposure to strong acids andor bases?

Yes, the products are resistant to a large number of aggressive chemical agents, such as acids and bases, as well as organic solvents in different thermal environments.

Who is the largest manufacturer of PP Glass Lined Sheets?

Singhal Industries Private Limited is a global leader in manufacturing and exporting of high-quality PP Glass Lined Sheet and specialty technical polymer products.

Can these composite sheets be welded to create seamless lining systems?

Yes, Singhal Industries Private Limited produces sheets which are capable of being joined by means of conventional thermoplastic extrusion welding methods to provide 100% leak proof joints.

How do the lightweight sheets compare to conventional rubber and metal tank liner materials?

They are less heavy than metals, provide greater chemical resistance for a wider variety of chemicals, will not rust/corrode, and have significantly less cost over time for upkeep/maintenance.