one. First is the yarn
The yarn material of the old coarse cloth is generally divided into pure cotton yarn and polyester cotton yarn. Most use pure cotton yarn, but some inferior old coarse cloth will use polyester cotton yarn or recycled cotton. The difference between cotton yarn and polyester-cotton and recycled cotton yarns is very large. Moreover, the surface of the coarse cloth woven from polyester cotton is not smooth and flawed.
Is it the same as cotton yarn? no! There are also differences in cotton yarns because of the different processes of the yarn. Some use air spinning, and some are ring spinning (I think most buyers have never heard of it, huh, huh ~~). The difference between ring spinning and air spinning
1. From the appearance of the yarn, the single fiber on the surface of the ring yarn is basically in the direction of the twist, relatively neat, and there is little entanglement of the fiber to the fiber. The surface of the air yarn has more ruthenium fibers. Entangled, so the airflow yarn is easy to untwist, and the ring yarn is not easy to retire.
2, from the yarn body structure, the ring spinning is relatively tight, and the air spinning is relatively fluffy, the style is rough, suitable for denim fabric, the air spinning yarn is generally thicker.
3, ring ingot, also known as OR (RING SPUN) can untwist the yarn, if the opening is ring spinning. Air spinning OE (OPEN END), the yarn is untwisted, if it is not open, it is air spinning. Ring-spun yarns are generally used to make higher-end products, and at the same time, it is better to match cotton. Air-spun yarns are generally used for lower-end products, and all aspects are a little worse than ring-spun yarns.
4. Because the raw material fiber of air spinning is short, the spinning twist is larger than the ring spinning, so the fabric shrinkage is also larger than that of the ring textile. Therefore, in the process design, this feature should be taken into account, because the twist is large, the feel of the fabric Also bad. The following are their procedures: ring spinning (combing) process: clear flower room - carding - pre-adhesive - strips and rolls - combing - heading and draw - two draws - Roving--filament--winding ring spinning (combing) process: clearing room--carding--heading---two-way drawing--roving--spinning--winding process : Clear flower room - carding - headline - two-way draw - air spinning so many old coarse cloth sellers' yarns are air-spun, cheap. High-end products are still ring spinning. Therefore, the price of the ring spinning yarn is much higher, and of course it is also durable and suitable for high-end products. This is why some yarns cost a few dollars, some ten yuan or more.
two. Again weaving
The high-grade coarse cloth is made of pure cotton 21-ply yarn. The low-grade coarse cloth is generally made of recycled cotton and polyester cotton. The weft yarn is made of 10 single yarns, and the quality of warp and weft are different. The high-grade coarse cloth warp and weft density is 48*38, the bed sheet is 200*220CM, and the weight is within the range of 2-2.5 kg; the low-grade warp and weft density is generally around 34*34, and the weight is within 1.4-1.8 kg. There are also some old coarse cloths with some poor yarns in the middle of good yarns during production, which reduces the cost. However, after washing one water, there will be problems of different shrinkage rates. Let the cloth no longer flat! three. Finally, the product work high-grade coarse cloth sewing thread and fabric color are the same, the front and back work is the same, the stitches are every 3CM12-15 needles, no messy thread head; the low-grade coarse cloth generally uses white sewing thread, the work of the front and back is obviously different, the stitches are every 3CM7-9 needles, There are obvious clutter on the surface. And often the size of the pillowcase is inconsistent, or the opening is inconsistent, as well as the patchwork pillowcase, the cover, etc.! Please buyers and sellers must pay attention!
In fact, there is a lot of knowledge about dyeing lines. Dyeing is also a factor in price differences. The quality of the dyed line in the Dyeing Factory is excellent and the test is qualified. Small dyeing plants are not necessarily, not only dyed lines are easy to fade, some in order to improve the color fastness, it is possible to increase the content of formaldehyde, causing formaldehyde and other harmful substances to exceed the standard, causing harm to your body.
I also hope that you will compare the prices and compare the quality, because the old coarse cloth market is not good enough, there is no specific industry standard, so many buyers often buy poor quality products. I hope that when you buy old coarse cloth, ask the other party whether the quality is guaranteed, whether there is a formal quality inspection report, whether it is a regular brand, or a trademark. It is recommended to cherish your family and not to use products that are too inferior. That is because one-third of the time in life is spent in bed. The following is a little way to identify the old coarse cloth, I hope to use it for everyone!
To distinguish between old and coarse cloth, the first thing to pay attention to is the quality of cotton yarn. Cotton yarn and cotton are closely related. The poor cotton yarn is mainly from Chen cotton, small cotton, and even waste cotton reuse (commonly known as recycled cotton). These cotton spun yarns have low fastness and easy to wash the fabric. Moreover, it is also very environmentally friendly, especially for recycled cotton, which often lacks strict disinfection and sterilization measures. The sheets woven with this kind of cotton yarn are gray and gray in color, and the line is observed. It can be seen that the thickness of the line is uneven, and it is broken. Good cotton yarn is white in color, strong in color fastness, and can not be woven into sheets and not faded.
Polyester and cotton are often the most difficult to distinguish. For insiders, it can be distinguished by the feel and the shape of the fiber. But ordinary people are often slow to find it for a long time. The polyester sheets are lighter in weight and do not shrink much. It feels dry when sleeping, and it is easier to get static electricity. Polyester/cotton, after washing, the surface of the sheet is very uneven due to shrinkage, just like sandpaper, such a product is not good.
Only cotton, after washing, the surface is smooth, and after washing is softer than before washing, the more wash the softer. Most people think that the thicker the old coarse cloth, the better. In fact, it is thick and not thick, and it is related to density and yarn count. The old coarse cloth woven from the really good cotton yarn, the same thickness, is thinner than the thickness of the polyester cotton, because of the soft and solid edge. So judging whether the coarse cloth is good or bad, thick is not the only standard. What we want to focus on is its feel. A good coarse cloth should be thick and flexible, and the hand feels comfortable.
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