Homework #7 Chapter 7 Knit Fabrics

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Oregon State University, Corvallis *

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Mechanical Engineering

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Jan 9, 2024

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Name: Isabella Lozano Homework #7 Chapter 7 Knit Fabrics, Pages 167-187 (20 points) • Refer to your Tex7le Kit. You will need to reference several swatches while comple7ng this homework assignment. • You must complete this enErely on your own. Type your answer directly on this document, then save the document in a pdf file and submit it in Canvas. • Due: Before class. 1. Below is an image of a knit fabric. 2. Knit SEtch (also known as the “Plain SEtch”) See swatch # 120. Place your pick glass on the surface of swatch #120. What cues are there to indicate that this is made with “knit s7tches”? Does the s7tch look like the one in the diagram on the leN? You can tell that the fabric was constructed using knit stitches because of the fine, closely-knit stitches that give it a smooth, velvety touch when you run your fingertips over it. The stitch looks like the one in the diagram. 3. Tuck SEtch See swatch # 126. Some of the sEtches used to make the fabric are “tuck sEtches.” (see image below) Place your pick glass o the surface of swatch #126. What cues are there to indicate that this structure includes some “tuck s7tches?” Which would you choose? You need a fabric that… Knit Woven Is less likely to wrinkle X Stretches/moves with your body X Shields you from the wind X Shields you from the rain X Shrinks less X Is less likely to snag and sag X Provides insula7on in calm/s7ll air X Define wale: The term "wale" describes the knit fabric's ver7cal columns of loops or s7tches. Define course: In a knit fabric, the term "course" describes the horizontal rows of s7tches or loops.

There is a no7ceable varia7on in thickness and texture that allows me to iden7fy the presence of tuck s7tches. When I run my finger7ps over the fabric, I can feel different places where there are more s7tches. These loca7ons create elevated paYerns and have a different tac7le quality, which indicates that tuck s7tches were purposefully used in some design components. 4. Float/Miss SEtch See swatch # 127. Some of the sEtches used to make the fabric are “ﬂoat/miss sEtches.” (see image below) . From swatch #127, what cues are there to indicate that this structure includes some “ﬂoat/miss s7tches?” The way the yarn ﬂoats over mul7ple s7tches to create a somewhat looser, more open texture helps me iden7fy ﬂoat or miss s7tches. These parts have a no7ceable looseness and subtle lightness that I can see, which suggests that certain design components purposefully used ﬂoat or miss s7tches. 5. Purl SEtch To the right are images that show a knit s7tch and a purl s7tch. Which one is the “purl s7tch” ? a or b? A is the purl s7tch. What part of the loop is visible on the face of the fabric when a purl s7tch is used? When a purl s7tch is used, the purl bump or purl loop is visible on the fabric's face. Single Filling Knits Plain Jersey ➢ Place your pick glass on the face of swatch #121. Describe what you see. A smooth and uniform surface created by the interlocking loops of the knit structure. ➢ Place your pick glass on the back of swatch #121. Describe what you see. Series of interlocking loops forming a neat and orderly pattern Jacquard Jersey ➢ Find the jacquard jersey fabric in the swatch kit. Write the swatch # and describe what you see. #126, #127, #128 Under the finger7ps, a jacquard jersey fabric exhibits detailed textures and paYerns that are woven into the material with a no7ceable sense of depth and diversity. Because of the Jacquard weaving technique, the surface has a textured and frequently elevated feel that is rich both visually and tac7lely. Pile Jersey ➢ Image on the right shows a pile jersey. Look at swatch #141. ➢ Knit Terrycloth (kniYed terry) (uncut pile) With regards to proper7es, how does kniYed terrycloth compare to woven terrycloth? a b

Compared to woven terrycloth, kniYed terrycloth feels more elas7c and stretchy because of its looped yarn composi7on. The woven terrycloth seems heavier and less yielding to the touch than the kniYed variant. We1-Inser4on Jersey ➢ How does the construc7on of weN-inser7on jersey differ from the construc7on of pile jersey? In comparison to regular jersey, weN-inser7on jersey is made with extra non-stretch threads inserted horizontally, giving it a harder structure and less stretch. As opposed to this, pile jersey has elevated loops or cut threads on the surface of the fabric, giving it a dis7nc7vely soN and tac7le feel that is more opulent and textured. ➢ What is the difference between French terry (swatch #143) and ﬂeece (sweatshirt ﬂeece – swatch #144)? French terry feels breathable and moisture-wicking because it has a smooth surface on one side and a looped texture on the other. In contrast, sweatshirt ﬂeece is a dense, napped material that feels warmer to the touch and acts as insula7on. Double Filling Knits Rib Knit ➢ Look at swatches 131 and 132 . Pull the fabrics widthwise. Describe the difference in the appearance between the 2 fabrics. When handled, the 2x2 rib knit fabric has an elas7c, structural feel due to its textured paYern of raised and lowered lines that alternate. By contrast, the 1x1 rib knit has a smooth, stretchy feel that creates an opulent and form-filng texture when touched, while the slinky knit boasts a sleek and shiny surface thanks to filament yarns. Interlock ➢ Interlock has the structure shown in the boYom-right image. Look at swatch 133 under your pick-glass. In the box, describe what you see on the face and the back of the fabric. Jacquard double knits ➢ Look at the back of swatch 139 . This is a “Jacquard Double Knit” structure. ➢ Look at the back of swatches 127 & 128 . These are “Jacquard Jersey” structures. ➢ Visually, how do the back of the Jacquard Double Knit and the backs of the Jacquard Jerseys compare? Face: The face has a homogeneous, smooth texture that feels nice to the touch and is similar to plain coYon. Back:The back has the same smooth surface as the front, showcasing the dis7nc7ve interlocking design that gives it a solid, substan7al feel and prevents any visible looped

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Compared to the backs of Jacquard Jerseys, the back of a Jacquard Double Knit usually seems more 7ghtly woven and structured. Intricate detailing and a more prominent paYern are common features of the Jacquard Double Knit, but the backs of Jacquard Jerseys may have a more open knit structure. Warp Knits ➢ Which is a “Warp Knit” structure? The one on the right or leN? Le], this one is warp knit. Tricot versus Rashcel ➢ Look at the following fabrics in your texEle kit: #146 to #158. In the table provided below, list the swatch numbers that correspond to each structure. Swatch # Fabric name 146 Tricot 147 Sheer Tricot 148 Sa7n Tricot 149 Brushed Tricot 150 Stretch Velvet 151 Cuddle Dot Swatch # Fabric name 152 Flat Lace 153 Raised Lace 154 Stretch Lace 155 Net 156 Point d’esprit 157 Hex Mesh 158 Fishnet Mesh Tricot Raschel