阅读说明：本技术 一种复合型水印纸的制备工艺 (Preparation process of composite watermark paper ) 是由 赵含刚 于 2021-07-22 设计创作，主要内容包括：本发明公开了一种复合型水印纸的制备工艺,包括以下步骤：通过雕刻技术将设计好的图案雕刻到专用橡胶辊上,将带有水印图案的橡胶辊安装到布胶机上,两个卷筒纸在牵引装置的带动下纸张不断向前输送,橡胶辊在胶水槽内沾上胶水,纸张经过橡胶辊时,位于橡胶辊下侧的纸张紧贴着带有胶水的橡胶辊行走,使橡胶辊上附着的胶水完整地滚涂到纸张表面,涂有胶水的纸张经过烘干道挥发水分后使两层纸张紧密贴合在一起。通过压合机构对复合后的纸张做进一步处理,从而形成复合型水印纸。(The invention discloses a preparation process of composite watermark paper, which comprises the following steps: carve the special rubber roller with the pattern that designs through the sculpture technique, install the rubber roller that has the watermark pattern on the adhesive tape dispenser, two roll papers are constantly carried forward under draw gear's drive to the paper, the rubber roller is stained with glue in the glue groove, when the paper passes through the rubber roller, the paper that is located the rubber roller downside is hugged closely the rubber roller walking that has glue, make the paper surface of complete roll coating of adnexed glue on the rubber roller, the paper that scribbles glue makes two-layer paper tensioning closely laminate together after drying the way water content that volatilizees. And further processing the compounded paper through a pressing mechanism, thereby forming the compound watermark paper.)

1. A preparation process of composite watermark paper is characterized by comprising the following steps:

designing the watermark pattern by adopting computer software, then engraving the designed pattern on a special rubber roller by an engraving technology, wherein the watermark pattern engraved on the rubber roller is of a concave structure on the rubber roller;

installing a rubber roller with a watermark pattern on a glue spreader, adding a proper amount of glue into a glue tank of the glue spreader according to production requirements, and installing two roll papers on a paper placing frame of the glue spreader in an up-down parallel structure;

respectively pulling out two roll papers for a certain distance and introducing the two roll papers into a traction device, and ensuring that the paper pulled out from the two roll papers walks on the upper and lower sides of the rubber roller;

starting the glue spreader, continuously conveying the paper forwards under the driving of the traction device by the two roll papers, continuously rotating the rubber roller, and sticking the glue in the glue groove, wherein the water mark pattern on the rubber roller is of a concave structure, so that the water mark pattern part can not be stuck with the glue;

when the paper passes through the rubber roller, the paper positioned on the lower side of the rubber roller is tightly attached to the rubber roller with glue to travel, so that the glue attached to the rubber roller is completely rolled and coated on the surface of the paper.

After the paper coated with the glue volatilizes water through the drying channel, the paper is gradually close to the paper positioned on the upper side of the rubber wheel under the control of the glue spreading machine, so that the two layers of paper are tightly tensioned and attached together.

And further processing the compounded paper through a pressing mechanism, thereby forming the compound watermark paper.

Technical Field

The invention relates to the technical field of papermaking processes, in particular to a preparation process of composite watermark paper.

Background

With the continuous improvement of scientific technology and production technology, the anti-counterfeiting watermark paper is widely used in anti-counterfeiting paper, security paper, certificate paper, trademark paper, product description paper, appearance packaging paper, and anti-copying and anti-confidentiality paper in relevant industries such as military affairs, public security and national defense, and has the effects of preventing counterfeiting and altering and the like. The production process of the traditional watermark paper comprises complex processes of designing, engraving, making a net, papermaking and the like. When the paper is in a wet state, the fiber density of part of the paper is changed through the watermark template, and after the paper is dried, the pre-designed watermark pattern can be generated due to the difference of light transmission of all parts caused by the change of the fiber structure of the paper. However, the watermark anti-counterfeiting technology is complex in process and high in cost.

Disclosure of Invention

In order to solve the problems in the background art, the invention provides a preparation process of composite watermark paper.

In order to achieve the purpose, the invention provides the following technical scheme:

a preparation process of composite watermark paper comprises the following steps:

designing the watermark pattern by adopting computer software, then engraving the designed pattern on a special rubber roller by an engraving technology, wherein the watermark pattern engraved on the rubber roller is of a concave structure on the rubber roller;

installing a rubber roller with a watermark pattern on a glue spreader, adding a proper amount of glue into a glue tank of the glue spreader according to production requirements, and installing two roll papers on a paper placing frame of the glue spreader in an up-down parallel structure;

respectively pulling out two roll papers for a certain distance and introducing the two roll papers into a traction device, and ensuring that the paper pulled out from the two roll papers walks on the upper and lower sides of the rubber roller;

starting the glue spreader, continuously conveying the paper forwards under the driving of the traction device by the two roll papers, continuously rotating the rubber roller, and sticking the glue in the glue groove, wherein the water mark pattern on the rubber roller is of a concave structure, so that the water mark pattern part can not be stuck with the glue;

when the paper passes through the rubber roller, the paper positioned on the lower side of the rubber roller is tightly attached to the rubber roller with glue to travel, so that the glue attached to the rubber roller is completely rolled and coated on the surface of the paper.

After the paper coated with the glue volatilizes water through the drying channel, the paper is gradually close to the paper positioned on the upper side of the rubber wheel under the control of the glue spreading machine, so that the two layers of paper are tightly tensioned and attached together.

And further processing the compounded paper through a pressing mechanism, thereby forming the compound watermark paper.

Compared with the prior art, the invention has the beneficial effects that:

the composite watermark paper manufactured by the technical process is thinner than other parts because the watermark pattern part is not stained with glue, and has better transparency than other parts when viewed from light, thereby forming white marks, so the composite watermark paper is called white watermark. Compared with the traditional preparation process of the watermark paper, the preparation method has the following outstanding advantages: (1) the minimum watermark pattern can be a 6-number font, the manufactured watermark paper cannot see any pattern when being laid flat, and the pattern is particularly clear when being taken up to look at the paper, so that the watermark paper has strong anti-counterfeiting property; (2) the cost for making the watermark paper is 1/10 of the traditional process, so that a large amount of production cost is saved; (3) the watermark paper produced by the invention has no concave-convex feeling when being seen on the surface of the paper because the watermark pattern penetrates into the middle of the paper, and the paper positive and negative difference is basically controlled to be about 0 ℃.

Drawings

FIG. 1 is a process flow diagram provided by the present invention.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, the preparation process of the composite watermark paper provided by the invention comprises the following steps: adopt computer software to design the watermark pattern, then carve the special rubber roller with the pattern that designs through sculpture technique, the watermark pattern of sculpture on the rubber roller is sunk structure on the rubber roller, and the watermark pattern can be designed and carve according to the technology demand wantonly, owing to adopt laser engraving device to carve the watermark pattern on the rubber roller, can carve the pattern of 6 # font sizes at minimum, and is particularly clear moreover. The rubber roller with the watermark pattern is installed on the glue spreader, a proper amount of glue is added into a glue tank of the glue spreader according to production requirements, and the two roll papers are installed on a paper placing frame of the glue spreader in an up-and-down parallel structure. The two roll papers are respectively pulled out for a distance and are led into a traction device, and the paper pulled out by the two roll papers is ensured to walk on the upper side and the lower side of the rubber roller. The glue spreading machine is started, the two roll paper are continuously conveyed forwards under the driving of the traction device, the rubber roller rotates ceaselessly, glue is stained in the glue groove, the watermark patterns on the rubber roller are of a concave structure, the watermark patterns are partially stained with the glue, when the paper passes through the rubber roller, the paper on the lower side of the rubber roller is tightly attached to the rubber roller with the glue to walk, and the adhered glue on the rubber roller is completely roll-coated on the surface of the paper. After the paper coated with the glue volatilizes water through the drying channel, the paper is gradually close to the paper positioned on the upper side of the rubber wheel under the control of the glue spreading machine, so that the two layers of paper are tightly tensioned and attached together. And finally, further processing the compounded paper through a pressing mechanism, thereby forming the compound watermark paper. After the two layers of paper are compounded, the watermark pattern part is thinner than other parts, and when the watermark pattern part is seen by light, the transparency is better than other parts, and a white mark is formed, so that the watermark is called white watermark. The watermark paper manufactured by the process method can not see any pattern when being horizontally placed, and the watermark paper is especially clear when being taken up to look at the light, thereby having strong anti-counterfeiting characteristic; the cost for making the watermark paper is 1/10 of the traditional process, thereby saving a large amount of production cost; because the watermark pattern penetrates into the middle of the paper, the paper surface has no concave-convex feeling, and the paper positive and negative difference is basically controlled to be about 0 ℃.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.