Textile printing thickener types and history
2016-07-19 18:01:10
Coating paste printing is a polymer compound film formed on the fabric, the pigment fixation on the fabric glue printing solution. Participate mortar print paste thickener to increase its viscosity, reducing its liquidity, it has pseudoplastic viscosity decreased under shear force, easy to drain from the printing screen mesh in to the fabric dyeing, add after losing viscosity shear force can be maintained in situ and impervious to other parts of the fabric Secondly, printing paste spread on the outer fabric, yarn within the fabric is not bonded to feel beneficial. this rheological properties of printing paste adhesive self-crosslinking or crosslinking with each other so that paint particles closely , can improve the wash fastness and resistance to conflict, so the nature of the thickener resolution printing paste with mortar mortar printing function, but also directly affect the quality of mortar printing goods in paint mortar printing, and will be used to glue pulp and paste two kinds of primary data. Since the paste printing process, the consistency will decline so they need to go to the consistency of the paint thickener paste printing materials increase, then we should use mortar printing thickener.
Mortar printing thickener is supplied to the primary effect of outstanding rheological function, network printing, glue or paste printing roll is transferred to the fabric, the dye and fiber together to ensure that mortar printing pattern summarized clearly. Pattern clear, bright color, uniform; when the dye fixation, the repercussions of goods and the residue was easily removed in the downstream process, the fabric soft to the touch. Visible, mortar printing thickener plays a major effect in the appropriate mortar printing industry.
Speaking mortar printing thickener, it is still a very long history of development. A long time ago used a slurry of starch or modified starch, which is known as natural thickener thickener, but this coating mortar printing thickener its use of high cost, low color depth, brightness poor, poor fastness washable, fabric feel is not satisfactory. Currently some thickener has gradually been screened. Back from the state slurry thickener 1950s to 70 years on behalf of a synthetic thickener, thickener paste printing process, the effect is without doubt.
Nature thickener paste printing resolution of the printing paste mortar mortar printing function, but also directly affect the quality of mortar printing goods. Therefore, in the coating mortar printing, pick accurate thickener is close to the main, the quality of goods from the customer must be stable function, increase the number and amount of induction factors to select the most suitable quotes from a mortar printing thickeners, so long as the ability to produce the higher cost of goods.
1. natural thickeners
The high cost of using natural thickeners, color depth, bright degrees, wash fastness and fabric feel unsatisfactory, has now been phased out.
2. Emulsion thickener
Fifties and sixties of the 20th century, the use of slurry thickener A state composed of two immiscible liquids [such as hydrocarbons (oil phase) and water (aqueous phase)] in the emulsifier, constituted by high speed emulsification, are still use of emulsification and emulsion paste N paste MA state slurry has the following disadvantages: (1) paste printing paste-like consistency is not easy to conditioning; (2) a hydrocarbon evaporation drying and curing, there blasting risk; (3) oven hydrocarbons discharged to the atmosphere causing serious pollution; (4) the residual hydrocarbon odor after mortar printing on fabric.
3. synthetic thickeners
Early 1990s, constitute thickener handling pollution and safety problems, and transport and storage facilities, manufacturing simple, outline clear, bright color constituting the thickener is divided into non-ionic and anionic 2 categories.
3.1 Non-ionic thickeners
Most non-ionic thickening agent is polyethylene glycol ethers. Main commodities Lntexal HVW BASF of Germany, Japan's Dainippon Ink Ryuclve Reclucer 400 cone, by Japan Matsui Emulsur M. dye additives plant in Shanghai Co., Ltd. thickener M from fatty acids esterified with polyethylene glycol and then beating emulsion formed.
Electrolyte did not affect the non-ionic thickeners, good adaptability, but not as an anionic thickening thickening effect, therefore, a larger amount of printing paste glue manufacture hydrocarbons such as kerosene remains, constrained its further .
3.2 Anionic thickener
Anionic thickening polymer electrolyte compounds, molecules rich in many ionizable carboxyl group, a lightly crosslinked copolymer having which is characterized by low viscosity, strong thickening ability, good stability, easy to mildew thixotropy small viscosity shear rate by the minimal impact, good leveling and anti-spatter resistance, little effect on gloss, light can be used to thicken goods, printing paste does not use hydrocarbons, but the electrolyte sensitive, poor adaptability.
3.3-dispersed liquid thickener
Thickener dispersion liquid by a small (approximately of 1 m) dewatering the polymer particles are dispersed in a hydrocarbon carrier oil constitutes the lazy rich co-stabilizers and emulsifiers. Common lazy hydrocarbon carrier oil is a light mineral oil. Dispersion of fine polymer particle size, size and evenness of spread than solids grinding and dispersed in a liquid commodity. The thickener in alkaline particulate diameter increases by 1μm to 10μm, volume increased 1000-fold.
Now, the market share of domestic species is the primary location of the British production company colloid thickener Alcoprint PTF (liquid dispersion type). It is a high molecular mass of polyacrylic acid as the main agent with a suitable base (such as ammonia) and generate ammonium polyacrylate, add viscosity. the polymer has a micro-crosslinked structure, the onset of swelling in water, and the fetters of each other while suspended in the liquid phase, the constraint between the activists, increased viscosity, rheology similar emulsion paste . China now also has the role of lax type liquid commodities, such as Kiran piano and other developed QY-1 thickener is polyacrylic acid dispersions which pasting convenience, good original paste and paste stability, can long storage; through its test thickening than PTF; electrolysis-resistant features, similar rheological properties and PTF are attributable to pseudoplastic fluid, suitable for flat screen or rotary screen printing mortar, do not attack seepage representation, without adding impermeable agent.
3.4 Synthesis
Dyeing thickener vast majority of micro-crosslinked polymer, insoluble in water, can only play a swelling thickening effect by polymerization of particle size to meet the requirements of the polymer particles of the best ways to have an emulsion polymerization method thereof , inverse emulsion polymerization and precipitation polymerization
Baoyu Chemical Co., Ltd manufacture emulsion polymerization over 20 years, develop eco-friendly water-based printing material--synthetic thickener for pigment printing and binder. Welcome to official website at http://www.baoyu-chemical.com
