Abstract:
A smoothly bendable board including a middle layer, a first outer layer attached to the middle layer and a second outer layer attached to the middle layer is disclosed. The second outer layer has a lower bending stiffness according to ISO 5628 than the first outer layer such that the smoothly bendable board is outwardly bendable only in a direction towards which the second layer faces. A method for producing a smoothly bendable board is also disclosed.
Abstract:
This invention relates to a process for preparing breathable, elastic polyolefin films, including the steps of blow molding a mixture of olefins, styrenic thermoplastic elastomers and filler to facilitate the generation of porosity by stretching, squeezing the tubular to obtain a flat film, heating the flat film to the softening point, pressing the flat film, cooling the flat film to a temperature of 8 to 30°C, stretching the film in the transverse and/or longitudinal directions to make it breathable; it is also shown a plant for producing a breathable elastomeric polyolefin film and the use of a mixture of olefins, styrenic thermoplastic elastomers and filler to produce a breathable elastic film.
Abstract:
A polymeric article may include a first layer and a second layer directly contacting the first layer. The first layer may include a low surface energy polymer and may have a contact index of at least 5%. The second layer may include an elastomer.
Abstract:
The invention relates to a method for continuously producing a flexible elastic web material having two outer material webs or layers (20, 32), of which at least one is made of a textile material, and between which a pretensioned elastic intermediate ply is inserted that, when relieved from tension, causes the web material to shorten, and when tension is exerted thereupon, enables the web material to be elastically lengthened again. In order to produce the web material, the first material web or layer (20) is shaped to form a tube, and a contact adhesive (24) is applied thereto. Afterwards, a pattern (26, 28) of elastic threads or stands are, while pretensioned, progressively placed onto the outer side of this tube in a continuous manner in the longitudinal direction of the tube. A second material web or layer (13) is then placed onto the first tubular material web or layer provided with the pretensioned elastic threads, and is progressively joined in an adhering manner to the first material web or layer. The tube obtained hereby that is comprised of two material webs or layers with the embedded pattern consisting of pretensioned elastic threads or strands is then cut up in the longitudinal direction and unfolded in order to obtain the desired surface-elastic web material.
Abstract:
An apparatus (100) for forming a laminate of pre-preg composite material comprises supply means (200) to supply pre-preg strip (400) to a stationary mandrel (300). The pre-preg strip (400) is formed into a tube (410) on the mandrel (300), and is driven to both rotate relative to the mandrel and to move axially along the mandrel. In this way it can be dispensed from an end of the mandrel (300) and formed in to a further pre-preg strip (420) with off-axis fibres.