Yarns - Part II - Short Answer

Describe the most suitable yarn structure for a beanie and justify your choice.

Answer explanation

Criteria

Marks

Provides characteristics and features for an appropriate yarn

2

Provides some information for an appropriate yarn

1

Answer may include: A staple spun combed woollen yarn with a soft twist would be the most appropriate choice as the soft twist provides greater insulation. Woollen yarn is hairier and less refined so this is a good choice for warmth and insulation and greater resilience.

Outline FOUR properties of a high twist yarn.

(2 Marks)

Answer explanation

Criteria

Marks

Identifies four properties

2

Names three or less properties

1

Answers may include:

Firm, smooth, good lustre, good resiliency, strong, good abrasion resistance, poor absorbency, good elasticity, quick drying.

Compare FOUR properties of combed and carded yarns.

(2 Marks)

Answer explanation

2

Four correct properties showing how they are similar or different they are.

1

Three to two correct properties showing little or no similarities or differences

Answers may include: For carded cotton Properties include: Low to medium twist, uneven thickness, uneven surface, poor resiliency, strong, more durable, soft, absorbent or slow drying.

For Combed cotton properties include: Medium to high twist, even thickness of yarn, smooth surface, finer yarn, poor resiliency, improved yarn strength, durable, soft, absorbent and quick drying.

While the combed cotton has a higher twist in comparison to carded cotton which has a softer twist giving a looser structure.  This inturns creates a more absorbent yarn but slower drying than combed cotton.  The surface of combed cotton is smoother less fuzzy and more even creating a more refined and quality finish to the yarn.

Suggest and justify the most suitable yarn, either combed or carded for the construction of a babies all in one grow suit.

(2 Marks)

Answer explanation

2

Names correctly and supports with an argument the most appropriate yarn

1

Names  and supports with little argument an appropriate yarn structure

Answers may include: A carded yarn with a soft twist will create a most appropriate yarn as it is softer and more absorbent giving it greater comfort for the baby grow suit.  With an uneven surface the handle is enhanced and therefore comfort.

Compare the properties of a multifilament yarn and a staple spun.

(3 Marks)

Answer explanation

Criteria

Mark

States similarities/differences of a multifilament and staple spun yarn relating to aesthetic, strength, and end uses

3

States similarities/differences of a multifilament and staple spun yarn relating to either aesthetic or strength or end uses

2

States one similarity/difference of multifilament and staple spun yarn

1

Answers may include: Aesthetic- multi filament smooth, may have more lustre than staple spun. Strength- multifilament is stronger than staple. End Uses Staple spun is more suited to apparel for its comfort properties, absorbency and softness.  Multifilament is used for areas of manufacture that require strength and resiliency.