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Who Knows The Acrylic Paint Printing Adhesive?
- Jun 16, 2017 -

The printing paste consists of a coating, a binder, a thickener and a small amount of auxiliary materials. Since the coating is mechanically fixed on the fiber surface by the adhesive, the adhesive determines the rubbing fastness and soaping fastness of the printed fabric, The performance of adhesives plays an important role in printing [1].

At present, the paint printing adhesive is mostly obtained by conventional emulsion polymerization. Due to the presence of the emulsifier, the adhesion fastness of the adhesive is reduced, and the fabric fastness, rubbing fastness, feel, anti-pilling and other properties are decreased. At the same time, the environmental pollution caused by emulsifiers has also attracted people's attention. In order to solve the above problems, people use soap-free emulsion polymerization synthesis of paint printing adhesive [2]. As the emulsion-free emulsion of the latex particles clean surface, good monodisperse, but also eliminates the traditional emulsion polymerization of emulsifiers on the environment pollution problems [3], therefore, soap-free emulsion polymerization technology in the paint printing adhesive synthesis Has received widespread attention.

In this work, a non-soap emulsion printing adhesive NZ-071, which is excellent in performance, was prepared under the condition of no N2 protection from the soap-free emulsion polymerization mechanism of acrylic acid. Printing fabric friction, soaping fastness and feel are significantly improved, so as to solve the conventional emulsion polymerization due to the addition of emulsifier water resistance, poor stain resistance, fabric feel hard and weak gloss problem.

1 experimental part

1.1 main raw materials

Monomer: Methyl methacrylate (MMA), Butyl acrylate (BA);

Functional monomers: acrylic acid (AA), methacrylic acid (MAA); initiator: ammonium persulfate (APS);

Crosslinking monomers: hydroxyethyl acrylate (HEA), N-methylolacrylamide (NMA);

Protective colloid: polyvinyl alcohol PVA (1799 type), sodium carboxymethyl cellulose (CMC);

Paint: Paint Red FGR, Paint Gold FGR, Paint Blue.

1.2 Major instruments and equipment

Y571B-type friction fastness tester; MU505T-type uniform small rolling; DHG-9076A electric temperature control blast dryer; BP221S LA-205-type fabric heat setting machine; SW-12A-resistant color fastness testing machine.

1.3 Preparation of printing adhesive NZ-071

A three-necked flask equipped with a stirrer, a constant pressure dropping funnel and a thermometer was placed in a constant temperature water bath, and a volume of deionized water was added to a three-necked flask. The temperature was raised to 70 ° C by stirring, and a certain amount of polyvinyl alcohol and carboxyl Methyl cellulose sodium aqueous solution, maintaining the temperature of 75 ~ 80 ℃. In the continuous dropping process, the mixture of APS, AA and HEA with pH value adjusted to weakly alkaline was added dropwise. After 1 ~ 2 min, the ratio of 3: MMA mixed monomer, 2 h after the drop finished. Insulation 1 ~ 2 h, down to room temperature, filtration.

1.4 paint printing process

1) printing paste

Raw material formula / (g / L)

Coatings 2 to 12

Adhesive 10 ~ 50

Crosslinking agent 32 1 to 6

Emulsion paste 10 to 60

2) Process flow

Printing → drying (80 ℃ / 3 min) → baking (120 ~ 180 ℃ / 1.5 ~ 5 min)