Institut Textile De France

Centre Technique Industriel Dit: Institut Textile De France

Lainiere De Picardie, S.a.

Vetrotex Saint-Gobain S.a.

Robert M Bolliand

Pierre Groshens

Andre Vuillaume

Gerard Lamure

Dominique Loubinoux

A method for producing a shaped non-woven comprises the steps of feeding fibers on a carding machine over a limited width, superposing on a receiving system the fibrous web leaving the carding machine and needling the superposed layers. The superposition is preferably obtained by winding over a cylindrical drain. The shaped non-woven obtained has a thickness gradually decreasing towards its selvedges. The obtained strip has a cross-section of an asymmetrical shape by longitudinal cutting along the median axis and optionally two longitudinal cuttings on the selvedge side.

Method and device for producing a shaped non-woven, non-woven obtained

The thermobonding interlining is a nonwoven covered on one face with dots of thermobonding resin. According to the invention, the nonwoven is a web, containing no binding agent, of which the g/m2 weight is less than 50, which is produced from fibers in a thermoplastic material, such as polyamide; the mean diameter of the fibers is comprised between 1 and 5 .mu.m, the consolidation of the nonwoven is obtained by intermingling of the fibers by high pressure streams of fluid, notably by injection of water at pressures of 40 to 80 bars, or by thermal bonding. For example, the fibers being obtained from a mixture of constitutents having different melting points, the bonding points result from the melting and bonding of the zones of fibers having the lowest melting point.

Thermobonding interlining containing microfibers

The process of treatment according to this invention is applied to a textile piece--weave, knit or finished article--constituted wholly or partly by yarns of continuous filaments with adherent microfilaments, obtained by star--or lamellar spinning, for example comprising six to eight unitary microfilaments of 0.2 to 0.4 dtex. It consists in subjecting said piece, resting on a support screen, to the action of jets of water at a pressure of at least 4.multidot.10.sup.6 Pa, whereby the structure of the piece is modified and the unitary microfilaments are separated.

Process for treating textile pieces by high pressure water jets

The thermo-bonding interlining is a nonwoven covered on one face with dots of thermo-bonding resin. According to the invention, the nonwoven is a web, containing no binder or thermo-fusible fibers, whose weight per square meter is between 50 and 150 g, and which is produced from filaments in a thermoplastic material, such as polyester; the mean diameter of the filaments is between 3 and 5 .mu.m, and preferably 90% of the filaments have a diameter comprised between that range; intermingling of the filaments is obtained by streams of high pressure fluid, such as streams of water at pressures of 40 to 80 bars.

Thermo-bonding interlining containing microfilaments

This invention relates to needling of continuous glass yarn mats. The invention consists in subjecting the mat to the action, preferably simultaneous action, of needles of different diameters. Thus perforations of different dimensions, preferably regularly distributed, are made in the mat. This mat is intended to be used as reinforcement in composite materials with a base of thermoplastic resins, in particular in laminates.

Method and apparatus for needling of glass mat and composite product

Rough product constituted of a film of plastic material, such as a mono-drawn polyester film, presenting perforations of which the outlines form craters raised with respect to the surface of the film. This product may be obtained according to the needling technique.

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Ecully, France

Robert M Bolliand