MAT. SCI. & ENG: AN INTO. WILEYPLUS
MAT. SCI. & ENG: AN INTO. WILEYPLUS
10th Edition
ISBN: 9781119472001
Author: Callister
Publisher: WILEY
Question
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Chapter 22, Problem 1DP
To determine

To list:

The advantages and disadvantages of the various materials that are used for the container production with the consideration of following aspects:

  • Cost of the containers;
  • Recyclability of the containers;
  • Energy consumed for the production of these containers.

Expert Solution & Answer
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Answer to Problem 1DP

The commonly used materials for the production of containers are listed below;

  1. 1. Glass
  2. 2. Aluminum
  3. 3. Polyethylene terephthalate (PET or PETE)

The advantages and disadvantages of these materials are explained below:

Explanation of Solution

Glass:

Advantages:

  • Glass is an inexpensive material and it is readily available.
  • It is chemically non-reactive material.
  • It is the transparent material that gives a good appearance.
  • The recycling process of glass does not require much energy.
  • Increased and rapid production of recycled glass result in more usage and thereby reducing the pollutant emission.

Disadvantages:

  • Glass is a non-bio degradable material.
  • Sorting of salvaged glass takes more time and is an expensive process that reduces its market value.

Aluminum:

Advantages:

  • Aluminum is a non-corrosive material compared to ferrous materials.
  • Aluminum is easily available material.
  • It has the capacity to withstand higher temperatures.
  • Low energy is required to recycle the aluminum containers.

Disadvantages:

  • They are non-refillable.
  • Aluminum is the non-bio degradable material.
  • It promotes the chemical reaction between the packed material and container. Tin coatings are provided to stop the chemical reaction.

Polyethylene terephthalate (PET or PETE):

Advantages:

  • They possess good optical clarity.
  • It is the light-weighted material compared to the others.
  • It is a shatter-proof material.
  • The PET containers are easy to manufacture (blow molding).
  • It is chemically non-reactive material.

Disadvantages:

  • They are non-refillable.
  • PETs are the non-biodegradable materials.

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Chapter 22 Solutions

MAT. SCI. & ENG: AN INTO. WILEYPLUS

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