The more prominent advantages of pre-coated film over laminated film

Categories:Industry trends
Author:
Origin:
Time of issue:2018-01-15
Views:129

(Summary description)That is, the common point of bubbling and de-filming of the coated products processed by the glued wet composite process is that the film is separated from the substrate of the paper printed matter, which destroys the compactness and smoothness of the paper/plastic composite.

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The more prominent advantages of pre-coated film over laminated film

(Summary description)That is, the common point of bubbling and de-filming of the coated products processed by the glued wet composite process is that the film is separated from the substrate of the paper printed matter, which destroys the compactness and smoothness of the paper/plastic composite.

Categories:Industry trends
Author:
Origin:
Time of issue:2018-01-15
Views:129

　　If pre-coated film is used for coating, it can effectively prevent air bubbles or mold release of the coated product.

　　That is, the common point of bubbling and de-filming of the coated products processed by the glued wet composite process is that the film is separated from the substrate of the paper printed matter, which destroys the compactness and smoothness of the paper/plastic composite.

　　Is just a different form of expression. Blistering is the appearance of partial voids in the shape of needle tips, rice grains, streaks, and cracks. Stripping is the separation of paper and plastic in a large area or a whole.

　　Seriously analyze various incident cases, "membrane lengthening" and "sticky glue" are basic laws. The reason for the change of "film lengthening" and "sticky glue" is that there are a lot of organic solvents in the adhesive used in the wet compounding process.

　　These organic solvents cannot be fully utilized in the production process, and remain in the adhesive layer, which is compounded by the film and paper printing.

　　The organic solvent remaining in the adhesive layer must move continuously in the paper/plastic composite. It is necessary to strive to break away from the matrix of the glue layer and volatilize and escape to the atmosphere. This movement of organic solvent molecules is carried out simultaneously in different directions.

　　One part moves in the middle of the glue layer to make the glue soft and sticky; the other part penetrates through the glue layer and moves to the paper, forming diffusion in the ink printing layer, destroying the adhesion and penetration of the ink to the paper;

　　There is also a part that passes through the adhesive layer and moves toward the film. After being blocked, it gathers on the inner surface of the film, swelling the film, making it longer, and locally protruding into bubbles.

　　The softening and stickiness of the glue reduces the thermosetting adhesive force of the polymer material; the diffusion and dispersion of the ink causes the damage to the paper adhesion; the swelling of the film becomes longer, and it must stretch to the outside and separate from the paper printed matter matrix.

　　Using the glue-coating wet compounding process, sooner or later, lighter or heavier, blistering or peeling will inevitably occur.

　　There is no solvent in the hot melt adhesive used for the pre-coating film. There is no organic solvent to soften the glue, the diffusion of the ink, the swelling of the film, etc. The thermoplastic bonding force of the polymer material is generated after the heat source is removed, and it is firm and durable. Therefore, it can effectively prevent the occurrence of quality accidents caused by foaming and de-filming of coated products.

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