How To Pay Attention To The Specifications And Process Factors Of Knitted Fabrics In Design

The design of suitable knitting fabric specifications and processes needs to consider many factors, including fabric use, required hand feel, appearance and performance.

　　 Fabric use

Different fabric uses require different weaving specifications and processes. For example, a sportswear may need a tight fit design, while a sweater may need a relatively loose hem and cuffs.

　　 Desired feel and appearance

Generally speaking, the tighter the weaving specification and process will lead to the tighter the fabric and the denser the feel.

On the other hand, looser weaving specifications and processes usually lead to softer fabrics, but may lead to better permeability of fabrics. Therefore, it is necessary to determine the appropriate weaving specifications and processes according to the required hand feel and appearance.

　 Required performance

In addition to feel and appearance, the fabric also needs to have the required performance. For example, fabrics need to have enough strength to withstand the weight and pressure of clothes, and also need moisture absorption and breathability to maintain a comfortable wearing experience.

When setting appropriate specifications and processes of knitted fabrics, it is necessary to comprehensively consider multiple factors, and constantly try and adjust until the required performance and appearance are achieved.

The knitting specification of knitted fabric is determined by calculating the yarn length and cross sectional area of the fabric. The following are general steps for calculating yarn length and cross-sectional area:

Determine the size of raw materials: first, determine the size of raw materials to be used, such as fiber type, length, color, etc. of yarn. These material specifications will directly affect the final braiding specifications.

Determine weaving method: then determine the weaving method to be used, such as flat weaving, horizontal weaving, vertical weaving, etc. Different weaving methods will directly lead to different cross sectional areas and yarn lengths.

Calculation of yarn length: after determining the raw materials used and the weaving method, the yarn length needs to be calculated. Generally speaking, the yarn length is 2.5 times the length of the raw material.

Calculation of cross sectional area: after determining the yarn length, it is necessary to calculate the cross sectional area of the cloth. The cross-sectional area is the yarn length divided by 2, that is, A=L/2.

Adjust the size of raw materials: finally, adjust the size of raw materials according to the calculated yarn length and cross sectional area. For example, if the yarn length used is 20mm, the raw material size needs to be multiplied by 2.5 to get a width of 60mm and a height of 40mm.

These steps are only applicable to the knitting of knitted fabrics. The knitting specifications of other types of fabrics may be different.

The following factors need to be considered when choosing a knitting machine:

Demand: different knitted fabrics need different stitches and loom models. For example, the loom for producing woolen sweaters needs a higher number of stitches, while the loom for producing T-shirts may need a smaller number of stitches. Therefore, it is necessary to first determine what kind of knitted fabric needs to be produced, and select the corresponding loom according to the demand.

Machine model: when selecting the machine model, the size and production capacity of the machine need to be considered. For example, a small machine may only produce a small number of sweaters, while a large machine can produce more clothes.

Material cost: the cost of producing knitted fabrics is also a factor to be considered. When choosing looms, it is necessary to consider the cost of the machine and the cost of materials needed to produce knitted fabrics.

Labor cost: Finally, labor cost needs to be considered when choosing looms. If the production of knitted fabrics requires less labor, it may be more suitable to choose a small machine, but if more labor is required, it may be more suitable to choose a large machine.

When choosing a knitting machine, you need to consider the above factors and choose the most suitable machine model.

Knitting cloth is a kind of cloth made by knitting technology. Precautions in the production process include:

Spinning quality: the spinning quality of knitted fabric directly affects the performance of the fabric, so it is necessary to select high-quality yarn, such as cotton yarn, polyester yarn, etc.

Knitting technology: the knitting technology of knitted fabrics directly affects the performance of the fabrics, such as the organizational structure, coil size, coil density, etc. It is necessary to select a knitting machine suitable for the product requirements.

Production process: the production process also has a great impact on the performance of knitted fabrics, and it is necessary to ensure the quality and efficiency of all links, such as inspection and finishing in the production process.

Raw material selection: the raw materials of knitted fabrics also have a great impact on the performance of the fabric, such as the grade of cotton, the density of polyester, etc.

Machine maintenance: The machine needs to be inspected and maintained regularly during production to ensure its normal operation, reduce downtime and improve production efficiency.

Workers' operation: workers' operation skills and experience have a vital impact on the production of knitted fabrics. Regular training is required for workers to ensure that they can master the correct knitting technology and be able to cope with emergencies.

The loop density of knitted fabric can be calculated by the following steps:

Determine the type of knitted fabrics: knitted fabrics can have different types, such as wool, polyester fiber, etc. Each type of knitted fabric has a different number and density of loops.

Measure the size of knitted fabric: measure the size of knitted fabric and record the length and width of each loop.

Calculate the quantity required for each coil: multiply the length and width of each coil to obtain the quantity required for each coil.

Calculate the coil density: divide the required number of each coil by the length and width of the coil to obtain the coil density of knitted fabric.

The following is an example of calculating the coil density:

Suppose there is a piece of wool knitted fabric with a size of 120 x 140cm, and the length of each coil is 20cm, and the width of each coil is 10cm. Then the coil density of the wool knitted fabric can be calculated as:

Number of coils (cm2): 120 x 140=18800

Quantity required per coil (cm2): 20 x 10=200

Coil density (cm2/m2): 18800 ÷ 200=9.2

Therefore, the coil density of the wool knitted fabric is 9.2.

The shrinkage of knitted fabric can be calculated by the following formula:

Shrinkage=(knitted fabric area per unit length - dry fabric area)/knitted fabric length per unit length

Among them, "knitted fabric area per unit length" and "dry fabric area" can be calculated using the following formula:

Knitted fabric area per unit length=Knitted fabric length x Knitted fabric width

Dry fabric area=fabric length x fabric width

Substituting the above two formulas into the formula of shrinkage ratio, we can get:

Shrinkage=((1 x knitted fabric length) - (1 x fabric length))/(knitted fabric length - fabric length)

Divide the numerator and the mother to get:

Shrinkage=(knitted fabric length - fabric length)/knitted fabric length

Therefore, this formula can be used to calculate the shrinkage of knitted fabrics.

Please note that this formula only applies to knitted fabrics, not woven or warp knitted fabrics.