A plastic film roll includes: a convolute cardboard tube including a tubular body having a tubular body wall formed by a plurality of layers of a straight rolled cardboard sheet having a weight equal to or less than 300 gsm; a plastic film wound about the convolute cardboard tube to form a plurality of plastic film windings around the convolute cardboard tube, the plastic film windings creating a radial compression force equal to or greater than 10 bar on the tubular body wall, wherein the cardboard sheet includes a plurality of fibers, at least a majority of the fibers being substantially aligned in a tangential direction relative to the tubular body to allow the convolute cardboard tube to resist the radial compression force.

A plastic film roll includes: a convolute cardboard tube including a tubular body having a tubular body wall formed by a plurality of layers of a straight rolled cardboard sheet having a weight equal to or less than 300 gsm; a plastic film wound about the convolute cardboard tube to form a plurality of plastic film windings around the convolute cardboard tube, the plastic film windings creating a radial compression force equal to or greater than 10 bar on the tubular body wall, wherein the cardboard sheet includes a plurality of fibers, at least a majority of the fibers being substantially aligned in a tangential direction relative to the tubular body to allow the convolute cardboard tube to resist the radial compression force.

A plastic film roll includes: a convolute cardboard tube including a tubular body having a tubular body wall formed by a plurality of layers of a straight rolled cardboard sheet having a weight equal to or less than 300 gsm; a plastic film wound about the convolute cardboard tube to form a plurality of plastic film windings around the convolute cardboard tube, the plastic film windings creating a radial compression force equal to or greater than 10 bar on the tubular body wall, wherein the cardboard sheet includes a plurality of fibers, at least a majority of the fibers being substantially aligned in a tangential direction relative to the tubular body to allow the convolute cardboard tube to resist the radial compression force.

The present invention relates to a method for manufacturing a paper straw, the method comprising: a paper roll transmission step, a paper strip heating step, a bonding and shaping step and a cutting step. Wherein, a plurality of raw paper rolls face a connection position jointly to transmit a raw paper strip, the raw paper strip includes a paper material and a dry hot-melt adhesive. The dry hot-melt adhesive of the raw paper rolls is heated for changing into flow hot-melt adhesive. Then the raw paper rolls is transmitted to the connection position for rolling jointly, and the flow hot-melt adhesives are bounded on another raw paper strip to form a pipe. Finally, the pipe is cut to form at least one paper straw after the pipe exceeds a setting length. The present invention uses dry adhesive to manufacture paper straw, without the excessive glue problem and mold phenomenon of the traditional wet bonding method as well as without an extra dry fixing step of traditional manufacture process, so the productivity will be raised significantly, and the defect rate will be reduced.

The present invention provides a method for the manufacture of disposable straws (preferably having an average length between 10 cm and 30 cm) and cup lids from fibrous materials preferably including paper, cardboard, plant fibers, animal fibers, artificial fibers, fabrics made from one or more thereof; or non-woven materials made from one or more thereof. These manufacturing steps generally and preferably include: (1) feeding a strip of fibrous material into a tank of adhesive or glue for treating fibrous material with a solution of cellulose ester in a solvent; (2) feeding the treated fibrous material into a press or spiral winding unit; (3) drying, cutting, and forming the fibrous material into disposable straws or cup lids; (4) testing the formed disposable straws or cup lids for quality control; and (5) packaging the disposable straws or cup lids.

The present invention provides a method for the manufacture of disposable straws (preferably having an average length between 10 cm and 30 cm) and cup lids from fibrous materials preferably including paper, cardboard, plant fibers, animal fibers, artificial fibers, fabrics made from one or more thereof; or non-woven materials made from one or more thereof. These manufacturing steps generally and preferably include: (1) feeding a strip of fibrous material into a tank of adhesive or glue for treating fibrous material with a solution of cellulose ester in a solvent; (2) feeding the treated fibrous material into a press or spiral winding unit; (3) drying, cutting, and forming the fibrous material into disposable straws or cup lids; (4) testing the formed disposable straws or cup lids for quality control; and (5) packaging the disposable straws or cup lids.

The present invention relates to a paper material for producing a paper straw mainly, the paper material includes: a paper and a hot-melt adhesive material; wherein, the hot-melt adhesive material is provided on at least one surface of the paper, including an acrylic acid copolymer 40%45% w/w, an ammonia water less than 0.1% w/w or equal to 0.1% w/w and a water 55%60%. w/w The hot-melt adhesive material is presented as a dry hot-melt adhesive without viscosity and being transformed to a flow hot-melt adhesive with viscosity while being heated from 80 C.200 C. With the combination of hot-melt adhesive material's ingredient percentage, the present invention transfers the hot-melt adhesive from a dry hot-melt adhesive without viscosity to a flow hot-melt adhesive with viscosity for producing the paper straw, so the traditional excessive glue and fall-off problem and mold phenomenon is improved, the traditional adhesive drying process is prevented, raising the production speed of paper straw and reducing the defect rate of producing paper straw significantly.

The present invention relates to a method for manufacturing a paper straw, the method comprising: a paper roll transmission step, a paper strip heating step, a bonding and shaping step and a cutting step. Wherein, a plurality of raw paper rolls face a connection position jointly to transmit a raw paper strip, the raw paper strip includes a paper material and a dry hot-melt adhesive. The dry hot-melt adhesive of the raw paper rolls is heated for changing into flow hot-melt adhesive. Then the raw paper rolls is transmitted to the connection position for rolling jointly, and the flow hot-melt adhesives are bounded on another raw paper strip to form a pipe. Finally, the pipe is cut to form at least one paper straw after the pipe exceeds a setting length. The present invention uses dry adhesive to manufacture paper straw, without the excessive glue problem and mold phenomenon of the traditional wet bonding method as well as without an extra dry fixing step of traditional manufacture process, so the productivity will be raised significantly, and the defect rate will be reduced.

A method for handling and drying cardboard tubes is provided. The method involves using the skids for supporting cardboard tubes during the drying, wrapping and transport of the cardboard tubes, in order to reduce handling of the tubes while maintaining a low moisture level in the tubes.

A method for handling and drying cardboard tubes is provided. The method involves using the skids for supporting cardboard tubes during the drying, wrapping and transport of the cardboard tubes, in order to reduce handling of the tubes while maintaining a low moisture level in the tubes.