Postpress Technology 1000 Questions (167-172)

167. What are the characteristics of plastics for plastic drops?

Crystal glue is a special liquid transparent resin with high surface tension.

168. What are the types of plastic glue used in plastic dispensing?

Sub-soft elastic crystal glue and hard crystal glue, from the drying method is divided into room temperature curing type crystal glue Snuv
Cured crystal glue (ultraviolet curing type crystal glue).

169. How to choose soft elastic or rigid crystal glue?

Flexible elastic rubber is suitable for decoration of polyester, PVC, paper, metal trademark nameplates, souvenirs, etc. The finished product can be bent into a curved surface to maintain its flexibility for a long period of time. Hard metal glue decoration of metal trademarks, nameplates, badges, medals, handicrafts coating full, crystal clear, hard texture, high gloss.

1 70. What are the steps of the drop process?

1 Crystal glue is generally composed of two components, A and B. After being weighed in proportion, it is injected into the same container, and after being fully stirred, it is vacuum defoamed until the glue liquid is clear and transparent.

2 The prepared glue is filled into the plastic dropper bottle and evenly dropped onto the decorated article. The edge can be toggled with a small needle so that the glue is uniformly applied to the surface of the decorated article.

3 Generally, after 24 hours at room temperature, the adhesive can be cured. The UV-type crystal adhesive needs to be cured by ultraviolet light source irradiation.

4 The entire process of plastic drop and curing, the accessories must be placed horizontally.

171. Under what circumstances should the use of plastic machine production?
Large-scale, high-quality industrial production uses dedicated drop machines. The machine is divided into semi-automatic and fully automatic models. The X-axis single direction semi-automatic machine can be operated according to the computer program operation, automatic X, Y-axis direction of the plastic drop machine can be operated according to the computer program. General configuration 2-36 drop head can automatically handle resin defoaming and two-component resin mixing, as well as automatic cleaning device.

1 72. What is embossing?

Rolling patterns of different textures on the surface of board paper, artificial leather, etc., are called embossing.

Source: "Guangdong Printing" (author / Jin Yinhe: Beizhuang Institute of Graphic Communication)