How To Make Scientific Stereotype Production Process

Three requirements for stereotype

The stereotyping formula is a combination of multiple chemical agents mixed by certain concentration to achieve a fixed effect. Through the selection of stereotypes, it is expected that the following results should be achieved:

1) hand feel to meet customer requirements;

2) improve some of the internal indicators to meet customer requirements (such as tear, slip, pH value, etc.);

3) take into account the difficulty of the subsequent process (the latter refers mainly to shrinkage and clothing).

　　 Master the main characteristics of auxiliaries

The chemical additives used in the formulation are mainly divided into the following categories: softeners, antiskid agents, stiffening agents, penetrating agents, and pH regulators. According to ionic type, it can be divided into three types: anionic, cationic and nonionic. Because the chemical composition of each chemical agent is different, and there is incompatibility between different ionic types, the performance and function of additives should be fully considered in the selection and formulation of formulation.

Understand the properties and characteristics of the commonly used auxiliaries, and then have a certain understanding of the inherent strength of the fabric (the current control is mainly tearing and slipping), which is conducive to the formulation of the formulation.

Considerations for formulating formulation

The formulation of formulation is mainly concerned with slip and tear strength in terms of physical indicators.

Take woven fabric as an example, plain grain has low slip and tensile strength when it is low density, soft handle, high tear strength, high tensile strength, hard handle, easy to produce fish scales; twill varieties float longer and longer, slip worse, tear strength is higher; DOBBY cloth reference plain and twill; 80S single yarn varieties are very sensitive to various auxiliaries, and with weft direction during processing. There is a certain relationship between tension. Therefore, it is necessary to lay out the formula after checking the layout. For Fang Ping organization, the weft weft and the flat weft, weft and weft plain weave the meridional slip difference, the weft weave slipping difference, the elastic fabric is affected by elasticity, and the slip is generally higher than that of the pure cotton varieties with the same organization specifications.

The formulation of formulation must also be considered with the control of hand consistency between different orders. Mainly include:

1) adjust the difference of hand feel caused by different depth and color.

2) adjust the handle difference between the white cloth and YARN-DYE cloth.

3) adjust the difference between different batches or different patterns caused by different colors or other processes or processes.

4) adjust the difference between different batches and flower patterns resulting from internal and external rework. Before and after the shaping process, such as water washing, calendering, pre shrinking speed, etc., the influence on the handle should be fully considered when formulating the formulation.

　　 After having a thorough understanding of the above aspects, we can start formulating the formula (taking woven fabrics as an example):

1. Formulation of normal cloth.

1, analyze customers' samples (or requests), understand the style of hand feeling, and preliminarily determine which auxiliaries to use.

2, according to the fabric specification and customer quality standard, analyze the internal strength balance point, and preliminarily determine the quantity of qualified additives.

3, according to the order requirements, color combinations and combinations of dyes and special customers, it is necessary to determine whether the fabric needs finishing, washing and washing.

4, avoid adding too many antiskid agents to improve slippage on the basis of too much softener.

5. According to the organization specification, the possible preshrinking speed is analyzed.

6. Select the suitable finishing agents and dosage of the above 6 points to determine the softening formula.

　　 Two, rework cloth formulation formulation

The formulation of rework cloth mainly considers the consistency of hand feeling. What is particularly prominent is the effect of rework procedures on fabric handle. Generally speaking, only after the rework of the stereotype and the subsequent process, the soft formula can be formulated as clear water (pH adjusted to 5.5~6.5 grade) according to the requirements of the customer for pH value. After the various water washing rework, although the auxiliaries on the surface of the fabric will be washed away, some of them will be washed into the inner part of the fiber, which is more conducive to the improvement of the hand feeling after the process.

Therefore, after the rework is done, the formula must be formulated according to the formulation before washing. Generally speaking, the dosage is more reasonable about 1/2 of the original formula (softening agent is very few and many of which should be treated separately); after the mercerizing, the softener that has been added to the cloth on the mercerizing lamp has been destroyed, and the mercerizing is usually processed according to the original formula. Handled according to circumstances.

In short, formulation of formulation is a complex process, requiring thorough understanding of finishing processes and auxiliaries, thorough analysis of fabric structure, customer requirements, and so on.

This requires us to familiarize ourselves with the following elements:

1) customer requirements;

2) improve touch sensitivity.

3) the ability to analyze the style of hand.

4) ability to analyze fabric structure;

5) mastering the functions, functions and incompatibility of auxiliaries.

6) the influence of different finishing processes on fabric handle.

7) familiarity with the influence of different combinations of auxiliaries on physical indicators;

8) minimize the use of softeners, reduce costs and take into account quality.

After mastering these aspects, the formulation of stereotypes can be targeted.