Precautions for water-based ink printing non-woven fabrics
Date: Nov 08 2023 From: Star Color
As people's attention to environmental protection and health continues to increase, the printing industry is actively seeking more environmentally friendly and sustainable solutions.As an environmentally friendly printing method, water-based ink printing has many unique properties and a wide range of applications.As a kind of nonwoven material, non-woven fabric has the advantages of lightweight, good air permeability, environmental protection, etc., and is widely used in the field of packaging and printing.This paper will deeply discuss the precautions of water-based ink printing non-woven fabrics, including the selection and applicability of water-based ink, pre-printing treatment and preparation of non-woven fabrics, printing process parameters and equipment selection, quality control and precautions.
Selection and applicability of water-based ink
As an environmentally friendly ink, water-based ink is mainly composed of water-based resin, pigment, additives and water.Among them, water-based resin is the core component of ink, with high molecular weight, low toxicity and non-flammable characteristics, to provide good adhesion and film formation of ink.Pigments give ink bright color and good hiding power, commonly used pigments are organic pigments and inorganic pigments two kinds.The additives and water play a role in adjusting the viscosity, gloss and drying speed of the ink.
When choosing water-based ink, it is necessary to choose according to the characteristics of the material, surface treatment and printability of the non-woven fabric.In general, the type and arrangement of non-woven fibers have a great impact on the printing effect, so it is necessary to choose an ink suitable for non-woven materials.In addition, the surface treatment of non-woven fabrics will also affect the adhesion and printing effect of the ink, so it is necessary to choose an ink suitable for the surface treatment of non-woven fabrics.
In terms of applicability, the following points need to be noted:
1.The viscosity and rheology of the ink should be moderate to ensure that there are no problems such as poor flow and drying in the printing process;
2.The drying speed of the ink should be moderate to avoid problems such as uneven color and decreased adhesion caused by excessive drying;
3.The water resistance and friction resistance of the ink are better to ensure the quality and long-term use performance of the printed matter.
Pre-printing processing and preparation of non-woven fabrics
Before printing, the non-woven fabric needs to be treated and prepared to improve its printability and the quality of the finished product.Specific treatment methods are as follows:
1.Cleaning and drying：The non-woven fabric is cleaned, the surface impurities and oil are removed, and the dry treatment is carried out to ensure that there are no water beads and seepage problems in the printing process;
2.Surface treatment and modification：The surface of non-woven fabric is treated by chemical or physical methods to improve its adhesion and printing effect.The commonly used methods are heat treatment, ultraviolet treatment, plasma treatment, etc.
3.Prewetting treatment and water absorption adjustment：According to the needs, the non-woven fabric is pre-wet to improve its water absorption and permeability, and the moisture content of the non-woven fabric is adjusted to ensure that there is no drying too fast or color inequality in the printing process.
In the preparation process, you need to pay attention to the following points:
1.The material and thickness of the non-woven fabric should meet the printing requirements to ensure the quality and durability of the printed matter;
2.The surface treatment of non-woven fabrics should be uniform to improve the adhesion and printing effect of the ink;
3.The pre-wetting treatment of non-woven fabrics should be moderate to avoid excessive drying or color inequality.
Printing process parameters and equipment selection
In the printing process, it is necessary to select the appropriate printing process parameters and equipment to improve the quality and efficiency of the printed matter. The specific methods are as follows:
1.Select the right printing equipment:Select the appropriate printing equipment according to the material, thickness and printing requirements of non-woven fabrics, such as gravure presses, lithography presses, screen presses, etc.
2.Determine the appropriate printing process parameters：Select the appropriate process parameters according to the actual situation and experience, such as ink viscosity, printing pressure, the number of roller lines, etc.
3.Choose the right drying equipment and process:According to the actual situation and experience, choose the appropriate drying equipment and process, such as infrared drying equipment, UV drying equipment, etc., to control the drying speed and ensure the quality of printed matter.
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