A drinking straw includes a cylindrical sidewall having a longitudinal axis and a flexible region formed in the sidewall. The flexible region including a plurality of segmented sections separated from each other by inward annular corrugations. Each corrugation has a height parallel to the longitudinal axis and a depth transverse to the longitudinal axis. The height of each corrugation is one and a half times greater than the depth of the corrugation.

Provided is a paper straw manufacturing method for addressing the issues of manufacturing process inefficiency and inconvenience in the drinking process of paper straws formed by a glue-adhesion method, the paper straw manufacturing method comprising: a step of unwinding a plurality of paper strips equipped with a thermal adhesive coating material on at least one side in each of a plurality of rolls; a step of heating the unwound plurality of paper strips by means of a heater; a step of winding, by means of a belt, the heated plurality of paper strips on a core rod so as to form a preparatory straw; a step of the preparatory straw following the length direction of the core rod by means of a guide portion; and a step of cutting the preparatory straw by means of a cutting portion so as to form a straw.

In order to solve the disadvantages of plastic straws in terms of environmental pollution, and the inconvenience of the above-described paste-adhered paper straws, provided is a paper straw comprising: an inner paper portion in which a single strip of paper without a heat-adhesive coating material on the inside surface thereof is spirally wound so as to form a single layer, and an outer paper portion which comprises at least one paper strip forming at least one layer around the outer peripheral surface of the inner paper portion while being wound in a spiral, and which is provided with the heat-adhesive coating material on the outside surface of the paper strip forming the outermost layer, wherein the paper strip of the outer paper portion has a wider width than the paper strip of the inner paper portion, the heat-adhesive coating material is provided between two paper strips of adjacent different layers, and the heat-adhesive coating material has adhesive strength or water resistance according to heating and curing.

Apparatus (10) for automatically producing tubular elements (100) to make smoking articles and/or products for food use, comprising at least one forming unit (12) configured to form the tubular elements (100) starting from shaped flat sheets (101). The forming unit (12) comprises one or more forming devices (29) which are moved by movement means (30) along a work path (PL) closed in a loop, in order to form the tubular elements (100).

The invention relates to a production machine for producing rod-shaped products from a continuous strand of a continuous strip adhesively bonded to form a tube, comprising a device for applying a glue track to a strip, a format portion, in which the continuous strip into the continuous strand by shaping and adhesive bonding, and a cutting device which cuts the rod-shaped products from the continuous strand at a predetermined length, wherein the device for applying the glue track is formed by a device which applies the glue intermittently to form glue-free portions arranged at regular intervals, and a sensor apparatus is provided, which is directed towards the continuous strip or the continuous strand and generates a signal depending on the passage of a glue-free portion, and the device for applying the glue track is designed to change the length of the glue-free portions in the longitudinal direction of the glue track.

A straw (1) made from paper or paper-like material and comprising a tubular body (3) having a circumference formed by a wall (5) surrounding a central axis and a bendable part extending axially along the central axis (6), wherein said bendable part comprises at least two corrugated profiles (8A-D) provided in the wall, and each corrugated profile comprises inward corrugations (9A-D) and outward corrugations (10A-D) being positioned one after the other in axial direction along the central axis, and a system and method to produce the straw.

An apparatus and a method for manufacturing a drinking straw includes means for transferring a continuous material web through the apparatus, means for bending the continuous material web into a U-shape, a mandrel for receiving the U-shaped continuous material web, means for shaping the continuous U-shaped material web into a O-shape with an overlapping edge section around the tool, fastening means for fastening the overlapping edge section and a transverse cutter. The fastening means has a plurality of heated rollers in a row.

Apparatus for making straws comprising a support structure defining an internal volume and carrying a feeding station configured to feed a strip or at least one discrete sheet of paper material, and a forming station comprising a base, a first side wall and a second side wall converging with each other. The conveyor is configured to receive the strip in a substantially flat form at the infeed portion and wind it around the winding axis to define a cylindrical body made of paper material, wherein the first end portion and the second end portion are facing each other and overlapping to define a mutually overlapping portion. The apparatus further comprises a winding body passing through a conveyor passage opening, and a constraining station configured to constrain the first end portion with the second end portion to define a straw.

A biodegradable tea leaf straw suitable for use above room temperature and its manufacturing method. The straw includes a tubular body made from a composite. The composite includes the following raw materials by weight percentage: 35% to 65% of tea leaf mixture and 35% to 65% of biodegradable material. The tea leaf mixture contains tea leaf powder and inorganic filler powder. A particle size of the tea leaf powder is smaller than that of the inorganic filler powder. The tea leaf straw retains the natural aroma of tea leaves. All raw materials used in the manufacturing process can be quickly decomposed by environmental microorganisms. The tea leaf straw does not dissolve in the beverage, thereby not affecting its flavor during consumption. The tea leaf straw is feature can attract consumers to use these straws as an alternative to existing plastic straws.