Ingredients of moulding components, Other Engineering

Q. What are the ingredients of moulding components?

Ans. Polymer Additives: One or more of the following materials are added to the polymers, either before or during polymerization, to make them processable plastics.

            1. Catalysts or Accelerators: They are also known as hardeners. They are the catalysts which are added to accelerate the chemical reactions during polymerization of plastics.

            2. Fillers: These are the materials added to synthetic resins to dilute them in order to reduce their consumption. They also increase their bulk and thus, reduce the material cost. Many of them, specially when they are finally distributed help in increasing strength, stiffness and thermal resistance of the plastics. Materials added for this purpose include clay, tale, wood flour, mica, quartz, alumina, carbon black, calcium carbonate, asbestos or glass fibers etc.

            3. Modifiers: These are the chemicals added to plastics for changing the properties of the base resin. Some of them help in providing mechanical properties as well.

            4. Plasticisers: They are the chemicals added for either softening the resin of forming temperature or to improve their toughness of the finished stage and to impart flexibility to their finished products. A plasticiser is normally a fluid of high molecular weight.

            5. Stabilisers: Their addition to plastics help in preventing deterioration due to the action of heat and light.

            6. Initiators: They help in initiation starting the reaction i.e. polymerization. H2O2 is commonly used for this purpose.

            7. Dyes and pigments: They are the colouring agents, added to impart different colours and shades to plastics.

Posted Date: 8/3/2012 4:15:39 AM | Location : United States







Related Discussions:- Ingredients of moulding components, Assignment Help, Ask Question on Ingredients of moulding components, Get Answer, Expert's Help, Ingredients of moulding components Discussions

Write discussion on Ingredients of moulding components
Your posts are moderated
Related Questions
Inlet duct arrangement in Aircraft Engine: Wherever the APU is located, ducting will be required to bring air to the APU inlet. In figure 18.9. we can see that the inlet duct

Which type of financing is appropriate to each firm caselet

The design and implementation of an autonomous guidance system requires knowledge and an understanding of a wide range of technologies, from the physical dynamics of the vehicle (i

Design a combinational logic circuit that will generate the square off all the combinations of three bit binary number represented by A,B,C

Question 1 What is a computer? Explain the block diagram of a general purpose digital computer Question 2 Explain the instruction format of an assembler Question 3

Financial Management, Finance This case has been framed in order to test the skills in evaluating a credit request and reaching a correct decision. Perluence International is large

Spinning Reticle Seekers  A spinning reticle seeker contains a single thermal detector and a spinning patterned disk - such as the ‘Rising Sun' Reticle.   - consis

Assignment: You are interested in proposing a new venture to the management of your company. Pertinent financial information is given below. BALANCE SHEET Cash 2,000,000 Accounts

Describe the operation an 8086 will perform when it excutes ADD AX,BX

draw folded plate roof structure on multi purpose hall?