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Removal of excess resin

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  • 14/12/2018

There are two main methods for removing excess resin from the surface of the web: the doctor blade and the squeeze roller. The scraper can be as simple as a pair of angle irons arranged to contact the web. Usually they are mounted on a common rotatable support to control the pressure of the blade against the sheet. Since the pressure of the doctor blade against the web determines the thoroughness of the removal of excess resin, the uniformity of the web tension is somewhat streaked or the lateral…

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Dipping machine

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  • 13/12/2018

Plastic laminates are manufactured industrially, and the web is impregnated in a machine called a dipper or a dipper. It includes a paper roll unwinding device, a resin tank, a facility for removing excess resin, a drying chamber for evaporating most of the volatiles, a device for cooling the sheets, and a coiler or paper cutting and stacker.1. Paper ejection device The paper exit device typically includes a storage device or a moving connector such that the roll change does not require the paper…

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Saturated impregnation and infiltration process

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  • 12/12/2018

The analysis of the addition of the resin to the paper web in the plastic laminate is based on the assumption that the two processes that occur are simultaneous and sequential. First, the so-called saturated impregnation is the rapid absorption of the resin by the paper sheet during the main time interval when the sheet is in contact with the excess resin. The process begins when the web is first immersed in the resin and ends when the squeegee or squeeze roll removes excess resin.If the Washburn…

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Laminate pore size distribution

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  • 11/12/2018

In the early 1960s, many laminates used the properties of this paper to estimate the amount of resin they absorbed. They used a thin resin solution to fill all the voids of the paper with the resin solution and scrape off the excess solution. As long as the paper The apparent density is kept constant and the amount of resin absorbed will also be constant. They will then adjust the solids content of the resin solution to achieve the desired level of resin absorption. Reduced cost pressures, higher…

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Laminate paper handling

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  • 10/12/2018

The resin and the cellulose fibers are thoroughly mixed to obtain a laminate, and the web is usually immersed in a resin solution. The surface tension causes the web to absorb the resin solution and fill the porous structure of the entire paper. The excess resin is mechanically removed and the web is passed through a dryer to remove most of the solvent. This dried paper web can then be used in conventional paperboard equipment. Cut into flat plates of appropriate specifications. Different combina…

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The viscoelastic properties of the laminate

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  • 07/12/2018

Unpublished data that have been discovered confirms the viscoelastic behavior of decorative laminates, although other composites have been shown to have this property. Jerominids has done a lot of research work in this area at Reading University in the UK. He studied general-purpose decorative laminates using dynamic mechanical analyzers and stress-relieving techniques. In the two studies, a three-point method was used to apply a load to the square specimen under bending. The specimen was cut in …

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