Design Technology - Topic 4.2d-f

0.0(0)
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/10

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

11 Terms

1
New cards

Raw Materials for Plastics

Derived from non-renewable petroleum resource, such as crude oil, coal, or natural gas

2
New cards

Thermoplastics

Linear chain molecules with weak secondary bonds between the chains. Ductile, low stiffness, and can be reshaped after heating

3
New cards

Thermosetting Plastics

Linear chain molecules with strong primary bonds between adjacent polymer chains. High stiffness and strength, but cannot be reheated and remolded.

4
New cards

Natural Fibers

Materials produced by plants/animals that can be spun into a thread, rope, or filament. High absorbency, but low tensile strength/elasticity. Burns

5
New cards

Synthetic Fibers

Fibers made from a man-made material that are spun into a thread. Joining of monomers into polymers by the process of polymerization. Low absorbency, but high tensile strength/elasticity. Burns and melts

6
New cards

Weaving

Forming a sheet-like material by interlacing long threads passing in one direction with others at a right angle to them

7
New cards

Knitting

Converting a yarn into fabric by creating consecutive rows of interlocking loops of yarn

8
New cards

Lacemaking

Creating a decorative fabric that is woven into symmetrical patterns and figures

9
New cards

Felting

Converting yarn into fabric by matting the fibers together

10
New cards

Ethical Considerations

Material harvesting can be labor intensive and the making of textiles is often done by a low-skilled labor force in poor conditions

11
New cards

Composites

Mixture composed of two or more materials with one acting as the matrix and the other acts as a reinforcement. Made through weaving, molding, pultrusion, or lamination