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Technique for coating film on paper surface

A technology of paper and film coating, applied in lamination device, lamination auxiliary operation, lamination, etc., can solve the problems of film and paper separation, adhesion, difficult film and paper, etc., to improve the contact area and adhesion Increased, good fluidity effect

Active Publication Date: 2016-06-15
HANGZHOU BAISHENG PRINTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the lamination process, whether the film and the printed matter are firmly combined is greatly affected by the temperature, pressure and time during lamination; at present, a Chinese patent with a publication number of CN104802492A discloses a wrapping paper surface lamination process. Although it can reduce the processing cost of the film, it is difficult to bond the film and paper well, resulting in the separation of the film and paper quite often.

Method used

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  • Technique for coating film on paper surface
  • Technique for coating film on paper surface
  • Technique for coating film on paper surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A paper surface coating process, which comprises the steps of:

[0025] Step 1: Install the upper and lower molds of the film-coated mold on the hydraulic press respectively;

[0026] Step 2: Take the paper coated with ink on the surface and place it on the lower mold at room temperature;

[0027] Step 3: Cover the ink in step 2 with an EVA film coated with polyvinyl alcohol, and keep the temperature at 100° C. for 1 hour;

[0028] Step 4: Keep the temperature and press down the upper mold, the pressing pressure is 0.3Kpa, and the time is 10s;

[0029] Step 5: Take out the paper, trim and complete the lamination.

Embodiment 2

[0031] A paper surface coating process, which comprises the steps of:

[0032] Step 1: Install the upper and lower molds of the film-coated mold on the hydraulic press respectively;

[0033] Step 2: Take the paper coated with ink on the surface, and place it on the lower mold, where the temperature of the lower mold is 30°C, and the standing time is 25 minutes;

[0034] Step 3: Cover the EVA film coated with polyvinyl alcohol on the ink in step 2;

[0035] Step 4: press down on the upper mold;

[0036] Step 5: Take out the paper, trim and complete the lamination.

Embodiment 3

[0038] A paper surface coating process, which comprises the steps of:

[0039] Step 1: Install the upper and lower molds of the film-coated mold on the hydraulic press respectively;

[0040] Step 2: Take the paper coated with ink on the surface, and place it on the lower mold, where the temperature of the lower mold is 42°C, and the standing time is 23 minutes;

[0041] Step 3: Cover the ink in step 2 with an EVA film coated with polyvinyl alcohol, keep the temperature at 93°C for 1.7h;

[0042] Step 4: After reducing the temperature in step 3 to 8°C, the upper mold is pressed down at 0.4Kpa;

[0043] Step 5: Take out the paper, trim and complete the lamination.

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Abstract

The invention discloses a technique for coating a film on a paper surface and aims to solve the problem of easiness in separation of a coating film and paper. According to the technical scheme, the technique for coating the film on the paper surface comprises the following steps: 1) respectively mounting upper and lower molds of a film-coating mold on an oil press; 2) taking the paper with ink coated on the surface, and putting the paper onto the lower mold, wherein the temperature of the lower mold is 30-45 DEG C and the staying time is 20-30min; 3) uniformly coating a 50-120nm cellulose coating on the paper in the step 2); 4) coating an EVA film coated with polyvinyl alcohol on the cellulose coating in the step 3), and keeping for 1-2h under the condition of 90-100 DEG C; 5) downward pressing the upper mold, and reducing the temperature; and 6) taking out the paper and trimming, thereby finishing the film coating. According to the technique for coating the film on the paper surface, disclosed by the invention, the connection between the coating film and the paper is tighter.

Description

technical field [0001] The invention relates to the technical field of paper processing, in particular to a paper surface coating process. Background technique [0002] Laminating, also known as "overplastic", "mounting glue", "sticking film", etc., refers to applying a transparent plastic film to the surface of a printed matter by hot pressing, thereby separating the paper from the outside world and protecting it. and increase gloss. Laminating technology has been widely used in book covers, picture albums, souvenir books, postcards, product brochures, cartons, cartons, handbags, fertilizer bags, seed bags, self-adhesive labels, etc. [0003] Lamination is also one of the main processes of post-press processing. It is to place the plastic film coated with adhesive on the paper print, and the two are bonded together after heating and / or pressure to form a paper-plastic composite. It is one of the most popular products, and it is also one of the common post-press processing...

Claims

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Application Information

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IPC IPC(8): B32B37/12B32B37/10B32B38/00C09D129/04C08J7/04
CPCB32B37/10B32B37/1284B32B38/0036C08J7/0427C08J2323/08C08J2429/04C09D129/04
Inventor 潘芳
Owner HANGZHOU BAISHENG PRINTING
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