There is provided a wet paper web transfer belt for transferring a wet paper web, comprising: a wet paper web carrying side resin layer having a wet paper web carrying surface for carrying the wet paper web; and a roll side resin layer having a roll contacting surface. A water swelling rate of a resin material constituting the wet paper web carrying side resin layer and a water swelling rate of a resin material constituting the roll side resin layer are different, and the water swelling rate of the resin material constituting the wet paper web carrying side resin layer is 2.0% or more and the water swelling rate of the resin material constituting the roll side resin layer is 10.0% or less.

There is provided a wet paper web transfer belt for transferring a wet paper web, comprising: a wet paper web carrying side resin layer having a wet paper web carrying surface for carrying the wet paper web; and a roll side resin layer having a roll contacting surface. A water swelling rate of a resin material constituting the wet paper web carrying side resin layer and a water swelling rate of a resin material constituting the roll side resin layer are different, and the water swelling rate of the resin material constituting the wet paper web carrying side resin layer is 2.0% or more and the water swelling rate of the resin material constituting the roll side resin layer is 10.0% or less.

Provided is a pulp molding production line, comprising at least one molding machine and pulp molding robot and at least one press, wherein the molding machine, the pulp molding robot and the press are sequentially arranged, a transfer device is installed on the pulp molding robot, the transfer device comprises a wet pulp transfer mold provided with a sealed gas chamber therein, the front of the wet pulp transfer mold is provided with at least one recessed matching chamber that can fit over the external of a wet pulp product and is recessed to the sealed gas chamber side, the recessed matching chamber matches the wet pulp product, several interfacing apertures for communicating or connecting the recessed matching chamber with the sealed gas chamber are respectively formed on the inner wall of each recessed matching chamber and the bottom of the recessed matching chamber, a moving rack parallel to the wet pulp transfer mold is connected to the back of the wet pulp transfer mold through a guide mechanism, a driver is connected between the back of the wet pulp transfer mold and the moving rack, the driver drives the moving rack to move relative to the wet pulp transfer mold, and several evenly spaced vacuum chucks are provided on the moving rack.

Provided is a pulp molding production line, comprising at least one molding machine and pulp molding robot and at least one press, wherein the molding machine, the pulp molding robot and the press are sequentially arranged, a transfer device is installed on the pulp molding robot, the transfer device comprises a wet pulp transfer mold provided with a sealed gas chamber therein, the front of the wet pulp transfer mold is provided with at least one recessed matching chamber that can fit over the external of a wet pulp product and is recessed to the sealed gas chamber side, the recessed matching chamber matches the wet pulp product, several interfacing apertures for communicating or connecting the recessed matching chamber with the sealed gas chamber are respectively formed on the inner wall of each recessed matching chamber and the bottom of the recessed matching chamber, a moving rack parallel to the wet pulp transfer mold is connected to the back of the wet pulp transfer mold through a guide mechanism, a driver is connected between the back of the wet pulp transfer mold and the moving rack, the driver drives the moving rack to move relative to the wet pulp transfer mold, and several evenly spaced vacuum chucks are provided on the moving rack.

The object of the present invention is to provide a wet paper web transfer belt with excellent crack resistance in the regions of the wet paper web transfer belt facing the roll edges.

This is achieved by an endless wet paper web transfer belt travelling by rotation while being supported by a plurality of rolls in the press part of a papermaking machine; wherein the wet paper web transfer belt has at least an outer circumferential resin layer on the wet paper supporting side, the outer circumferential resin layer comprises roll edge-facing regions positioned to face both edges in the width direction of at least one of the plurality of rolls and a central region positioned between the roll edge-facing regions, the difference in the thickness between the thickness of the roll edge-facing regions and the thickness of the central region is 0.5 mm or less, and the maximum profile valley depth Rv of the outer circumferential surface of the roll edge-facing regions is 40 m or less.

The object of the present invention is to provide a wet paper web transfer belt with excellent crack resistance in the regions of the wet paper web transfer belt facing the roll edges.

This is achieved by an endless wet paper web transfer belt travelling by rotation while being supported by a plurality of rolls in the press part of a papermaking machine; wherein the wet paper web transfer belt has at least an outer circumferential resin layer on the wet paper supporting side, the outer circumferential resin layer comprises roll edge-facing regions positioned to face both edges in the width direction of at least one of the plurality of rolls and a central region positioned between the roll edge-facing regions, the difference in the thickness between the thickness of the roll edge-facing regions and the thickness of the central region is 0.5 mm or less, and the maximum profile valley depth Rv of the outer circumferential surface of the roll edge-facing regions is 40 m or less.

The invention relates to a method and apparatus for passing a web tail being threaded from one paper machine section to another by way of guiding the tail with the help of an air jet from a transfer plate. An essential feature of the invention is to employ a construction rising from the surface of the transfer plate to a height with the shape of a linear ramp or a droplet for guiding the web tail in its travel direction thereby minimizing the contact area between the web tail and the transfer plate.

A sheet manufacturing apparatus includes: a first transport unit that causes a first transport belt to circle around so as to transport a web containing a fiber; and a second transport unit that is disposed with a part thereof shifted from the first transport unit toward the downstream side in a transport direction of the web, sucks the web in a direction in which the web is spaced from the first transport belt, and transports the web. The second transport unit includes a suction unit that generates a suction force and a suction chamber which is positioned on an inner side of a second transport belt circling around and of which an inner space is sucked by the suction unit such that the web is adsorbed onto the second transport belt. A part of the suction chamber faces the first transport belt.

A sheet manufacturing apparatus includes: a first transport unit that causes a first transport belt to circle around so as to transport a web containing a fiber; and a second transport unit that is disposed with a part thereof shifted from the first transport unit toward the downstream side in a transport direction of the web, sucks the web in a direction in which the web is spaced from the first transport belt, and transports the web. The second transport unit includes a suction unit that generates a suction force and a suction chamber which is positioned on an inner side of a second transport belt circling around and of which an inner space is sucked by the suction unit such that the web is adsorbed onto the second transport belt. A part of the suction chamber faces the first transport belt.

A sheet manufacturing apparatus includes a first frame on which an accumulation belt and a first suction unit are installed and a second frame on which a transport belt and a second suction unit are installed. An eccentric cam is disposed between the first frame and the second frame. A position of the second frame with respect to the first frame is changed by rotation of the eccentric cam.