Disclosure of Invention
The present invention is directed to solving the above-described problems of the prior art and provides a high-gloss matte roll and a film coagulation method thereof.
The invention solves the technical problems by the following technical means:
The high-gloss matte roll comprises a roll body, wherein the roll surface of the roll body is provided with pits with the roll surface roughness RA of 0.05-0.5 mu m and the depth of 0.05-0.5 mu m, and the pits are uniformly distributed on the roll surface of the roll body.
Further, the roll surface roughness RA of the roll body was 0.1 μm, and the depth of the pits was 0.1. Mu.m.
Further, the pits are formed by sand blasting.
The invention also provides a method for condensing the film, which comprises the following steps:
And controlling the polymer film and the matrix to be simultaneously fed below a press roller, wherein the press roller is in contact with the polymer film, the press roller is heated to be more than 200 ℃, and the press roller is the high-gloss matte roller.
Further, the press roll was heated to 220 ℃.
The beneficial effects of the invention are as follows: according to the invention, the roughness of the roller surface is controlled, so that the adsorption effect between the high polymer film and the roller body during roller discharging is greatly improved, the linear speed of the roller body is improved, and the processing efficiency is greatly improved.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
As shown in FIG. 1, the high haze surface roller of the present application comprises a roller body 100 having uniformly distributed pits 110 on the roller surface of the roller body 100, wherein the roller surface roughness RA of the roller body 100 is 0.1 μm and the depth is 0.1 μm.
When the PE film is compounded on the paper surface, the PE film and the paper are simultaneously fed under the roller body 100, the roller body 100 contacts the PE film, and a heating medium is required to be introduced into the roller body 100 to heat the roller body 100, so that the PE film is compounded on the paper surface according with requirements, and the step is called as a condensation film in the industry. Under the process, the PE film is easy to be adsorbed with the roller body 100 when being discharged from the roller, so that the linear speed of the roller body 100 needs to be controlled to be 50-80 m/min, and once the linear speed exceeds the speed range, the composite yield of the PE film is greatly reduced.
The improvement of the high-gloss matte roll according to the present application does not start from the conventional reduction of the roll surface roughness, but instead, the roll surface roughness is controlled to be one degree, and the roughness RA is 0.1 μm and the depth is 0.1 μm, which are optimal conditions under which the linear velocity of the roll body 100 can be directly increased to 400m/min. Correspondingly, the roughness RA may be set to any value between 0.05 and 0.5 μm, and the depth of the corresponding pits 110 may be set to any value between 0.05 and 0.5 μm, and the linear velocity of the roll body 100 may exceed 300m/min in this range.
According to analysis, in the film condensation process, a certain amount of air is pressed into the concave points 110 at the moment when the roller body 100 contacts with the PE film, and an air gap medium layer is formed between the roller body 100 and the PE film by the air pressed into the concave points 110, so that the adsorption effect between the PE film and the roller body 100 when the PE film is discharged from the roller is greatly improved, the PE film is more easily separated from the roller surface of the roller body 100, and the linear speed of the roller body 100 can be improved.
The pits 110 on the roll surface of the roll body 100 are formed by sand blasting.
Correspondingly, the embodiment also provides a membrane condensation method, which comprises the following steps: the PE film and the paper are simultaneously fed under a press roll, which is in contact with the PE film and has a temperature of 220 ℃, and the roll body 100 described in the above embodiment is used.
The PE film is not limited to PE film, but may be other polymer film layer materials such as PET.
The above-mentioned paper is not limited to paper, and may be other substances that can be used as a base layer of a composite material, such as nonwoven fabric.
It is noted that relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.