Sewing thread is an indispensable accessory material for all textile industries, and how to purchase and customize sewing thread is a problem faced by all textile businesses. At present, the price of sewing thread products in the market varies greatly, making it difficult for buyers to truly judge that the quality of sewing thread is directly proportional to the price. Yiwu Yinxiang Sewing Thread Factory has ten years of experience in sewing thread production, processing, and customization, and has certain experience in judging the quality of sewing thread. In order for buyers to have an in-depth understanding of the quality of sewing thread products, the following key points are briefly listed:
Material:

Different fabrics and uses need to choose different materials of sewing thread, nylon thread, pure cotton thread, polyester thread, polyester cotton thread have different characteristics. Take the most used polyester thread on the market as an example, polyester has the advantages of high strength, wear resistance, good dyeing, low price, polyester staple fiber thread (commonly known as cotton thread) is the most used thread in the clothing industry, often said 402, 203 thread refers to this type of thread; Polyester long fiber wire (high-strength wire) is widely used in leather, bags, shoes and other industries because of its high strength and good luster, and common models include 150D, 300D, 500D, etc. There are many types of sewing thread materials on the market, and we can choose the same material according to the sample or the information provided by the customer. If 100% POLYESTER (pure polyester thread), this material is currently called the same in the market, but the price of the same material is very different, it is that some sewing thread manufacturers use the principle of 60% polyester + 40% recycled material for blending, so there is a great advantage in price, but there is a certain difference in quality and tensile strength, and this type of material often does not meet the standard testing.
Appearance

a, whether the finished sewing thread has fluffing and beading on the appearance, whether the outer winding is uniform, if it is uneven, there are joints inside.

b. Whether the appearance thickness of the finished sewing thread is uniform is used to judge whether there are joints.

c, the finished sewing thread is formed normally, and the mark is clear.

Strength

The tensile strength of the sewing thread must be tested by instruments frequently, and the tensile strength of the thread changes greatly due to the influence of raw material market factors.

Environmentally friendly

Some customers, especially foreign trade customers, have high requirements for environmental protection, and the testing of environmentally friendly sewing threads, in addition to the relevant certificates provided by sewing thread manufacturers, must also be strictly tested (can be submitted to third-party testing) spot checks, and ensure that the validity period of relevant certificates is valid.

Scaling (elongation)

The elasticity of the sewing thread has certain indicators, the low-end sewing thread is taken from the hand, when pulled by hand, the sewing thread will have a certain elasticity, it is easy to make the sewing thread longer, and will make the thread thinner, can not reach the standard specifications of the thread, this is because the sewing thread has not been treated by a special process after high temperature.

Wear-resistant and high-temperature resistance

The wear resistance and high temperature resistance of sewing thread are also very important characteristics. The sewing thread is easy to break and fluff when sewing, which is the reason why the sewing thread does not achieve heat resistance and wear resistance.

Twist

Both under-twist and over-twist can be problematic. The beading and loose strands of sewing threads will occur when sewing because the twist of the sewing thread is insufficient during the twisting process, and excessive twisting will cause problems such as strength loss and knotting.

Color fastness

The color fastness should reach a certain index, otherwise there will be problems such as color fading and fading.