Fabric (woven – knitted – or nonwoven textile or cloth – etc.) – Woven fabric – Strand material is composed of two or more polymeric...
Reexamination Certificate
1998-03-26
2001-02-06
Weisberger, Richard (Department: 1774)
Fabric (woven, knitted, or nonwoven textile or cloth, etc.)
Woven fabric
Strand material is composed of two or more polymeric...
C442S189000, C442S190000, C442S191000, C442S192000, C442S199000, C427S209000, C427S322000, C427S421100, C427S430100
Reexamination Certificate
active
06184161
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a method for manufacturing a three-dimensional textile product obtained in the form of a knitted fabric, a woven fabric or a technique suited therefor.
Textile products of the intended type are thoroughly described i.a. in patent application PCT/BE93/0048. They can be used as such or as reinforcement in composite materials.
Three-dimensional knitted fabrics or three-dimensional woven fabrics, as described in this application, specifically show a certain indentation stiffness, in other words a resistance against a movement of both woven or knitted fabric surfaces towards one another, which characterise these textile products.
It will be noted in passing that, besides knitted and woven fabrics, three-dimensional textile products can also be produced by braiding, tufting, sewing, etc. In the following description and claims, these different techniques will therefore be clarified by the expression “textile processing”.
The stiffness of the textile product is mainly dependent of the stiffness of the used pile thread, of the density of these pile threads and of the cross, i.e. perpendicular, obliquely or in section relation, as well as of the height of the pile threads, i.e., the distance between both of said surfaces of the textile product.
In order to increase the stiffness of a three-dimensional textile product for a given pile height, use is made of a stiffer thread or a higher density of these pile threads is applied, and this with the adequate crossing.
By this way of treatment, one is however faced with several problems, the most important of which can be described as follows: the higher the stiffness of the pile thread, the worse the weaving or knitting properties of the product, i.e. with the hereinabove mentioned textile treatment. When applying other production possibilities, the application of pile threads of this too high stiffness has also very adverse consequences.
SUMMARY OF THE INVENTION
An object of the invention is to provide textile threads, i.a. pile threads, which are sufficiently flexible and which can thus be applied in high densities. With a finishing treatment which pertains to the essence of the invention, the threads, i.a. the pile threads, are stiffened without having to fill up the distance between the above mentioned surfaces of the textile product, for example with foam.
In the following examples, pile threads, their structure, their preliminary and finishing treatment will be described and this in function of the essential role which has to be fulfilled by these pile threads in a three-dimensional textile product of the hereinabove described type. On the other hand, textile threads which do not have the function of pile threads, but which can be found only in the outer layers, may show the same structure and may have been subjected to the same preliminary or finishing treatment. The expression “pile thread” will thus never have to be interpreted in a narrow sense. They can thus contribute to an increase of for example the bending stiffness and the bending strength of said three-dimensional textile products and/or their composites.
To achieve the objects mentioned in the preamble, at least the textile thread which is destined as pile thread for this textile product is subjected to one or more of the following textile treatments:
a) the textile thread is enveloped;
b) several textile threads are added to the textile thread;
c) the textile thread is structured by making use of at least one monofilament and at least one multifilament;
d) the textile thread is structured by making use of at least one monofilament and at least one multifilament thread which consists at least partially of thermoplastic fibres;
e) each of the textile treatments mentioned in points a-d are performed under such circumstances that the textile thread is kept sufficiently flexible during a first textile treatment such as three-dimensional knitting or three-dimensional weaving and can be stiffened in a subsequent treatment such as thermoforming, melting together or impregnating with a matrix.
Other advantages and properties of the invention will become apparent from the following description of a textile thread, i.a. a pile thread, especially but not exclusively for use in three-dimensional textile products, according to the invention. This description is only given by way of example and does not limit the invention. The reference numerals relate to the figures annexed thereto all of which showing sections, on a very enlarged scale, of textile threads, i.a. pile threads according to the invention in different embodiments.
REFERENCES:
patent: WO 94 01272 (1994-01-01), None
Dorsey & Whitney LLP
Katholieke Universiteit Leuven
Weisberger Richard
LandOfFree
Method for obtaining a three-dimensional textile product,... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for obtaining a three-dimensional textile product,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for obtaining a three-dimensional textile product,... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2593920