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Paint Printing Adhesive Development Trend
- Jun 28, 2017 -

Polyvinyl acetate, although itself a binder, is not washable and harder, and therefore can not be used as a Printing Adhesive alone. If it is copolymerized with other monomers or modified, Can be used as a printing adhesive.

There are three types of dispersions in the water, which are water-dispersed, oil, water and water / oil. 1.2.1 Water-dispersed adhesive

Such as alamil adhesives, film formation speed, do not need high temperature baking.

Paint printing Adhesive In the film forming process, in addition to the cross-linking agent and self-crosslinking adhesive self-crosslinking is a chemical process, the basic physical process. The physical state of the adhesive is different and the film forming mechanism is different.

Paint printing adhesive dosage is very large, is to ensure that the quality of paint printing quality varieties, through decades of improvement, the adhesive in the handle and color fastness made great progress.

Over the years, by adjusting the ratio of the soft monomer of the copolymer to the hard monomer or changing the hard monomer to achieve a soft feel.

Second, reduce the film forming temperature, so that the film temperature to meet the process requirements.

Third, in the binder component by adding self-crosslinking monomer copolymerization, usually with methyl methacrylamide, in order to improve the fastness of the film.

Fourth, in the binder by adding etherified hydroxymethyl melamine as a cross-linking agent to improve the fastness of the film to reduce the amount of adhesive.

Fifth, dyeing and printing plant using baking curing process, improve the density of the film.

Solve the problem of free formaldehyde.

Free formaldehyde hazards and their limited requirements in the clothing has been known to everyone.

Paint printed cloth on the free formaldehyde from the adhesive, first self-crosslinking monomer using methyl methacrylamide, which in the self-crosslinking release formaldehyde, but its content is not high, only the total amount of monomer 3-5%.

Second, from the adhesive added to the external crosslinking agent, that is, etherified melamine formaldehyde resin, many foreign samples contain this crosslinking agent.

The solution is: First, the use of self-crosslinking monomer to other monomers, such as the use of acrylic acid and epichlorohydrin condensate, the product for the printing adhesive DPCE6J.

The second is not the use of self-crosslinking monomer copolymerization, and the adhesive made of cross-linking adhesive (that is, containing hydroxyl, amino, amide group of adhesive).

In the printing paste to add external crosslinking agent, external crosslinking agent: cross-linking agent EH, crosslinking agent H, crosslinking agent FH, crosslinking agent WHP, they are epichlorohydrin and amine condensate.

At present, the diene urea structure of the cross-linking agent worthy of exploration and application, such as cross-linking agent SU, 125FE.

Third, in the adhesive are not allowed to add melamine cross-linking agent, printing and dyeing plant should be strictly into the factory acceptance, the determination of formaldehyde content of adhesives, where the high formaldehyde binder is not allowed to use.