It's Polyester, But It's Cotton. Why?! (I)


It's polyester, but it's cotton, don't believe it?! Cloud silk cotton, silk like cotton, feather silk cotton, goose down like cotton, carding cotton, sheet cotton, non collodion cotton, shaped cotton, four hole cotton, antibacterial cotton, high elastic cotton, Dupont cotton... A pile of cotton is dazzling and dazzling. When choosing pillow core and quilt core, the hotel is at a loss and has no choice in the face of these gorgeous names. After carefully reading the labels of these products, they all have a common material: polyester or polyester fiber.


It turns out that the product material names on all labels must be marked according to national standards. So, since the country has strict regulations on the standards of materials, why do businesses still move out so many gorgeous names to "fool" consumers? It turns out that the final product made of the same material through different processes will also have a large difference in the final price due to the difference in cost, performance and other factors. The asymmetry of product information, objectively, exists the space of "fish's eyes are mixed with pearls", "shoddy goods are replaced by good ones" and "steal a beam to replace a pillar". Therefore, understanding the information behind these gorgeous names can help consumers correctly judge the quality and authenticity of products. It can also improve the enthusiasm of manufacturers of high-quality products.


1、 Classification of fibers

There are many fiber materials in the world, but there are not many varieties that are really suitable for hotels.

   Due to the bulkiness, flatness and uniformity requirements of hotel core products, down and polyester are often selected as core fillers, and the commonly known polyester filler is the most complex.


2、 Classification of polyester fillers

Polyester, scientific name: Polydimethyl terephthalate, belongs to polyester fiber, that is to say, it is a variety of polyester fibers. Since it can produce several kinds of fillers with different properties, we have to start from the classification of polyester and fillers.


01 Source

It can be divided into original and recycled materials. The primary material is mainly petroleum extract (PET chip), and the product is commonly known as large chemical fiber. The large chemical fiber is basically free of defects, with uniform fiber thickness, smooth surface, smooth feel, good strength and no color difference; Recycled materials are mainly recycled plastics (such as beverage bottles), commonly known as small chemical fibers. The price and quality of small chemical fibers are uneven, the feel is slightly poor, and there are many defects. Occasionally, the thickness and length are uneven, and the strength is slightly poor.


02 Thickness

It can be divided into coarse, medium and fine fibers. From 0.7D-25D, there are more than ten specifications. 0.7-3D is superfine or fine fiber; 3-10D is medium fiber; Above 10D is coarse fiber.


03 Form

It can be divided into carding cotton, floc/flake cotton. It is often said that shaped cotton and non collodion cotton are similar to floc/flake cotton. Carding cotton is fed into the carding machine with a variety of loose cotton fillings of different thickness and length as raw materials, and is formed through a series of operations inside the machine through multiple carding. Advantages: fluffy and plump, the quilt core made of it is relatively thrown, giving a thick and elastic feeling, and the processing cost is relatively cheap. Disadvantages: The adhesion between fibers is not firm, and the uneven distribution of fibers is easy to occur after a long time of use.

The difference between flake/flake cotton and carding cotton is that low melting point fibers are added and set at high temperature to strengthen the adhesion between fibers. Therefore, the quilt core made of it looks smooth and will not have uneven distribution of non fibers after a long time of use. Due to the strong fiber adhesion, the quilt core with the same weight is thinner than the carding cotton, but the processing cost is more expensive than the carding cotton.

Considering the requirement of the hotel to make a flat and uniform bed, the floc/flake cotton is generally used.


04 Number of "holes"

It can be divided into non porous fiber, single hole (hollow) fiber, four hole fiber, seven hole fiber and nine hole fiber. The number of "holes" refers to the number of cavities on the cross section of the polyester fiber slice observed under a high-power microscope. Generally speaking, the more "holes", the more static air it contains, the better its warmth retention, breathability and puffiness, and the softer its feel.


Read more!