Thermoplastic

A roofing job on a commercial building can represent a significant investment, but since few flat roofs will last more than 20 or 30 years, it is an expense that most commercial property owners will face eventually. Although the average cost for a typical flat roof on a commercial building is approximately $30,000, there are numerous factors that could drive that price up or down substantially. Here are some of the considerations that influence the cost of a commercial roofing job. Type of…

Understanding recyclable materials and eco-labels in packaging process 3.1.1. What packaging materials can be recycled? In general, most of packaging materials such as glass, metal, thermoplastic, paper and cardboards are suitable for recycling, but in many cases, not all of the materials can be recycled (Marsh & Bugusu, 2007, n.p.g.). For example, some materials, especially plastic food containers, are contaminated with oil and grease…

polyolefin? “A polyolefin is an odorless, non-polar, and non-porous material that can be used in structural plastics, consumer goods, industrial products, and food packaging. Polyolefin stands for "oil like" and is commonly referred to as a thermoplastic or polyalkene because it has a waxy texture.” (What is a Polyolefin? n.d.) The second question to ask is, how is a polyolefin made? Polyolefins are made by olefin polymerization. Olefins are organic hydrocarbons and are commonly known as…

2.1. Theoretical Background 2.2. Material Selection Material selection plays an important role as the humidifier has to deal with a pressure of 2 Bar and temperature ranging from ambient to 90oC (maximum) and have to bare a load of 80 Newton. Simultaneously it should be lighter than aluminum and should be cheaper and fabricating time should be less and it should be capable of mass production and before all this it should serve the purpose. when developing plastic parts. Selection of an…

How TPO Roofing Works TPO Roofing Thermoplastic Olefin (TPO) roofing membrane is often regarded as one of the most efficient and economical roofing alternative to PVC roofing. This single ply roofing system is made out of thermoplastic polyolefin membrane, which consist thermoplastic polyolefin top fly compound, TPO polymer base and polyester-reinforced fabric center. TPO fabric also uses fillers made out of carbon fiber, Metal Oxy Sulfate, wollastonite and fiberglass as well as EPDM and…

1) What are engineering stress and strain? Answer: Engineering Stress: Engineering stress is also called nominal stress, and it is defined as the applied load divided by the original cross sectional area of the material. Engineering Strain: Engineering strain is defined as the amount of material that deforms per unit length in a tensile test. Engineering strain is also known as nominal strain. 2) In the figure below, graphically show the toughness of three class materials:…

compound, it is called addition polymerization. The new compound has the same empirical formula. This process occurs when the monomer is unsaturated. Thermoplastics are produced through the addition polymerization. Condensation polymerization is when different compounds of monomer molecules combine with the loss of simple molecules. Thermoplastics and thermosetting plastics are produced. Polymers are classified into natural polymers and synthetic polymers.…

Polyethenics ( Vinyl Resins) They are obtained by the polymerization of monomers containing the ethylenic bond (-C=C-) I. Polyethylene ( PE ) Polyethylene is one of the simplest and most inexpensive polymers. It is a waxy, chemical inert plastic. It a thermoplastic formed by the addition polymerization of ethylene. There are two types of polyethylene  Low Density polyethylene (LDPE) By using free radical indicator, LDPE is obtained  High Density polyethylene (HDPE) Using ionic catalysts HDPE…

or remove it from the water. Besides the pool cleaner, you will also receive the power supply, and the filter bag with flotation and intake extensions if needed. Also, the buoyant thermoplastic rubber cord cable that comes with the unit measure 50 feet and it's ETL listed and UL certified and its made of thermoplastic rubber. The filter bag has to be loaded from the bottom of the…

Index 1. Introduction 2. About plastic 3. 7 Types of plastic 4. Plastic in the environment 5. Bioplastic and Biogradable plastics 6. Conclusion 7. Bibliography 1. From food containers to cars and from toys to technology, everything can be made out of plastic. Plastics are carbon based polymers (polymers mean something of many parts) mostly made from petroleum. There are approximately 100 million tons of plastic produced every year. Some people believed that we have entered the age…