According to some aspects, a storage unit for storing a photopolymer resin is provided. The storage unit may comprise a photopolymer resin, a bottom face comprising at least one region of actinically transparent material, the actinically transparent material being actinically transparent with respect to the photopolymer resin, at least one wall extending upwards from said bottom face comprising at least one region of actinically opaque material, the actinically opaque material being actinically opaque with respect to the photopolymer resin, and a lid comprising the actinically opaque material and removably connectable to the at least one wall.

A method for preparing a PBAT laminated membrane composite material uses PBAT or a material with PBAT as the main component and other biodegradable plastic or superfine calcium carbonate in a mixture. The temperature of the mixture is increased by means of a lamination machine segment by segment, the material is heated slowly to a molten state, and the temperature of a rolling shaft is controlled by introducing cold water to the rolling shaft when the lamination machine conducts membrane lamination, so that the temperatures of rolling wheels and the laminated membrane are controlled.

The invention relates to a powder hopper (101) for the gravity-driven feeding of powdered electrode precursor material (102) into a nip of a dry electrode calendar (2), said powder hopper comprising: a powder feed opening (105) for feeding powdered electrode precursor material (102) into the powder hopper; and a powder outlet opening (106) for metering the powdered electrode precursor material from the powder hopper into a nip, the cross-section of the powder hopper tapering between the powder feed opening and the powder outlet opening, and the powder hopper having a level detection means (103) for detecting the powder level of the powder hopper. The invention also relates to: a corresponding assembly consisting of a powder hopper and a first and a second roller that form a nip; and a method for operating a powder hopper.

The invention relates to a powder hopper (101) for the gravity-driven feeding of powdered electrode precursor material (102) into a nip of a dry electrode calendar (2), said powder hopper comprising: a powder feed opening (105) for feeding powdered electrode precursor material (102) into the powder hopper; and a powder outlet opening (106) for metering the powdered electrode precursor material from the powder hopper into a nip, the cross-section of the powder hopper tapering between the powder feed opening and the powder outlet opening, and the powder hopper having a level detection means (103) for detecting the powder level of the powder hopper. The invention also relates to: a corresponding assembly consisting of a powder hopper and a first and a second roller that form a nip; and a method for operating a powder hopper.

A powder storage apparatus 41 includes: a container 42 having a powder inlet 18A, a powder outlet 10A, and a gas outlet 18B; and a tube 70 connected to the powder inlet 18A. If A.sub.S [m.sup.2] is a cross-sectional area of a cross section perpendicular to an axis of the tube 70 at a bottom end 70b of the tube 70 and A.sub.B [m.sup.2] is a cross-sectional area of the gas outlet 18B, the following expression is satisfied.
A.sub.S/A.sub.B<4.

A powder storage apparatus 41 includes: a container 42 having a powder inlet 18A, a powder outlet 10A, and a gas outlet 18B; and a tube 70 connected to the powder inlet 18A. If A.sub.S [m.sup.2] is a cross-sectional area of a cross section perpendicular to an axis of the tube 70 at a bottom end 70b of the tube 70 and A.sub.B [m.sup.2] is a cross-sectional area of the gas outlet 18B, the following expression is satisfied.
A.sub.S/A.sub.B<4.

A powder is spread in two directions, that is, the advancement and retraction directions of a powder recoater. The powder recoater according to this invention includes a hopper that stores a powder, and a cylindrical powder supplier that has a side surface close to or in contact with the bottom surface of the hopper and includes a supply path for the powder. The powder recoater according to this invention further includes a pivoting unit that causes the powder supplier to pivot. In the powder recoater according to this invention, the center axis of the supply path is displaced from the center axis of the powder supplier in the radial direction of the powder supplier.

A powder is spread in two directions, that is, the advancement and retraction directions of a powder recoater. The powder recoater according to this invention includes a hopper that stores a powder, and a cylindrical powder supplier that has a side surface close to or in contact with the bottom surface of the hopper and includes a supply path for the powder. The powder recoater according to this invention further includes a pivoting unit that causes the powder supplier to pivot. In the powder recoater according to this invention, the center axis of the supply path is displaced from the center axis of the powder supplier in the radial direction of the powder supplier.

Systems, feeder devices and methods are disclosed for moving particulate hot melt adhesive from an adhesive supply to an adhesive melter. A hot melt adhesive system includes a melter configured to heat and melt particulate hot melt adhesive into liquid hot melt adhesive, an adhesive supply containing a bulk quantity of particulate hot melt adhesive, and a feeder device configured to intermittently transfer some of the bulk quantity of particulate hot melt adhesive from the adhesive supply to the melter. An adhesive supply includes a body containing a bulk quantity of particulate hot melt adhesive, and a feeder device integrated into the body and including a mechanical agitator configured to encourage movement of the particulate hot melt adhesive through the feeder device.

Systems, feeder devices and methods are disclosed for moving particulate hot melt adhesive from an adhesive supply to an adhesive melter. A hot melt adhesive system includes a melter configured to heat and melt particulate hot melt adhesive into liquid hot melt adhesive, an adhesive supply containing a bulk quantity of particulate hot melt adhesive, and a feeder device configured to intermittently transfer some of the bulk quantity of particulate hot melt adhesive from the adhesive supply to the melter. An adhesive supply includes a body containing a bulk quantity of particulate hot melt adhesive, and a feeder device integrated into the body and including a mechanical agitator configured to encourage movement of the particulate hot melt adhesive through the feeder device.