For the flame resistant textile industry, the color difference is one of the most important indexes to measure the quality of flame resistant fabric of manufacturer. But there is no denying that the color difference is one of the most common problems in the production. The color difference from original sample, the color difference between the selvage and the middle, the front and back color difference and other color difference problems happens a lot for many flame resistant fabric manufacturer. After all, during the continuous production of flame resistant fabric, the substantivity of the dye stuff or the immature dyeing cause the color difference problem.
For the long productions processes of flame resistant fabric, complicated manufacturing technique, the front and back color difference is easily appeared in the production. In order to eliminate the color difference, for the best quality, the following steps should be paid attention to:
1. Use the greige cloth of the same batch from the same manufacturer, well mark the greige cloth of different batches, in order to distinguish in the following process.
2. The same machine should be used in the pretreatment phase, the pretreatment process should be strictly controlled, for the concentration ratio of various addition agents, the special experiment personnel shall detect at fixed period to ensure there is no difference between the whiteness and PH of semi-finished product.
3. When carry out the dying, select the dye with similar substantivity, ensure the dye liquor in the dye vat reach the dynamic equilibrium, strictly control the dying temperature and washing temperature.
4. When carry out THPC, especially pay attention to the liquid amount and the moisture content, because the different moisture content of fabric will affect the color tone.
5.When carry out the tentering in the after treatment, the appropriate amount of weak acid shall be added to adjust the PH of fabric, ensure the speed and temperature of stenter is constant to avoid the color changing.
Besides, Xinxiang Yulong Textile Co., Ltd. respectively controls the greige cloth, printing and dyeing machine and technology, dye performance etc., so the color fastness of flame resistant fabric can be controlled at 4 grade or above. First, adopt reasonable technological process and process prescription in the pretreatment, self check the machine and carry out the spot check on the technology to improve the qualified rate of product, thus providing the qualified semi-finished product for the dyeing of flame resistant fabric. Second, when carry out the continuous dyeing, keep the constant machine speed and the constant temperature of dye liquor in the dye vat, ensure the liquid amount in left, middle and right of fabric have no difference, thus controlling the color difference. Select the dye with similar substantivity, strictly prevent the appearance of the front and back color difference of flame resistant fabric. In order to avoid the color difference from original sample, except adopt the visual inspection, the computer color measurement software shall be adopted to inspect DE. If there is no special statement from the customer, the color matching is generally carried out under the D65 light source, if the light source is assigned by the customer, we will carry out the color matching according to the light source assigned by the customer.
As the manufacturer of flame resistant fabric, Yulong always keeps the production quality in mind, we can ensure the soft hand feel and low formaldehyde and other advantages of the fabric while guarantee the quality of flame resistant fabric. We devote in researching and developing, producing the product with higher quality to recommend you with most proper flame resistant fabric.
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