A method of producing flexible polypropylene fabric bags with heat fused seams comprising providing fabric pieces, wherein each fabric piece has a coated side and an uncoated side; positioning fabric pieces so that a coated side of one fabric piece faces a coated side of another fabric piece; selecting an area of fabric to be joined for forming a seam or joint; applying heat to the area to be joined that is less than the melting point of the fabrics, for forming one or more seams or joints and wherein the heat fused seams or joints of a resulting polypropylene bag retains at least 85% of the fabric strength without using sewing machines.

An article of clothing is disclosed. The article of clothing a front panel. The front panel comprises an inner fabric layer; an outer fabric layer having a first portion and a second portion; and a thermoplastic strip. The first portion of the outer fabric layer is secured with the inner fabric layer. The second portion of the outer fabric layer supports the thermoplastic strip therewith. The back panel is attached to the front panel.

An article of clothing is disclosed. The article of clothing a front panel. The front panel comprises an inner fabric layer; an outer fabric layer having a first portion and a second portion; and a thermoplastic strip. The first portion of the outer fabric layer is secured with the inner fabric layer. The second portion of the outer fabric layer supports the thermoplastic strip therewith. The back panel is attached to the front panel.

Provided is a method of producing a layered article by which a sufficient production speed can be achieved, and preferably, a variation in fusion strength can be suppressed and hence a variation in product quality can be reduced. The method of producing a layered article of the present invention includes fusing at least part of a single-layer body or a laminate including at least one layer including a non-woven fabric of fiber having a fiber diameter of 100 m or less through ultrasonic welding.

Provided is a method of producing a layered article by which a sufficient production speed can be achieved, and preferably, a variation in fusion strength can be suppressed and hence a variation in product quality can be reduced. The method of producing a layered article of the present invention includes fusing at least part of a single-layer body or a laminate including at least one layer including a non-woven fabric of fiber having a fiber diameter of 100 m or less through ultrasonic welding.

The present disclosure relates to an inflatable structure transformable between a deflated state and an inflated state. The inflatable structure comprises a drop stitch fabric having a first layer and a second layer tethered by drop stitches. The inflatable structure is provided with one or more folding lines defining the inflatable structure into two or more interconnected chambers, the one or more folding lines comprising coupling means coupling the first layer to the second layer. Dimensions of the one or more folding lines and/or coupling means are adapted to enable the inflatable structure to in both the deflated state and the inflated state be foldable along the one or more folding lines. The disclosure also relates to a method for manufacturing a foldable inflatable structure in accordance with the foregoing.

Woven hats and methods for manufacturing woven hats by using an ultrasonic sewing technology without a sewing thread are disclosed. One illustrative method comprises steps such as: cutting a raw material of a hat crown into a plurality of pieces, then bonding such material in pairs using an ultrasonic sewing machine, applying to seam areas a hot-pressing bonding technology of heat-seal adhesive tape, and/or otherwise completing the manufacturing of the hat crown; manufacturing a visor by using a high-frequency hot-pressing technology; manufacturing a sweatband by using a one-time hot-pressing technology; bonding the hat crown, the visor, and the sweatband with an ultrasonic sewing machine; and fixing a rear fastener or a tail belt through rivets. The disclosed technology makes it easier to realize intelligent and automatic reformation of the manufacturing line.

Woven hats and methods for manufacturing woven hats by using an ultrasonic sewing technology without a sewing thread are disclosed. One illustrative method comprises steps such as: cutting a raw material of a hat crown into a plurality of pieces, then bonding such material in pairs using an ultrasonic sewing machine, applying to seam areas a hot-pressing bonding technology of heat-seal adhesive tape, and/or otherwise completing the manufacturing of the hat crown; manufacturing a visor by using a high-frequency hot-pressing technology; manufacturing a sweatband by using a one-time hot-pressing technology; bonding the hat crown, the visor, and the sweatband with an ultrasonic sewing machine; and fixing a rear fastener or a tail belt through rivets. The disclosed technology makes it easier to realize intelligent and automatic reformation of the manufacturing line.

A seam for joining fabric edges in which coils of seam elements shaped as a symbol for infinity or a lemniscate, that is, infinity elements, are joined to the fabric edges and the infinity elements are joined to each other with a pintle. A fabric element may be configured as a continuous loop to form an industrial fabric employing the infinity seam elements.

The invention relates to a method for the ultrasonic welding of a strip consisting of a plastic material for the production of cigarette products, in which method the strip has two free ends which are heated in a connection region by means of ultrasound and joined together to form a closed strip. Ultrasound at a frequency of more than 22 kHz is used.