Methods to manufacture a textile product
The present invention pertains to a method to manufacture a textile product comprising a first sheet having a width and a length, and polymer yarns fastened to this sheet to form a pile thereon, the method comprising providing the sheet, stitching the polymer yarns through the sheet to form the pile on a first surface of the sheet and loops of the yarns at a second surface of the sheet, transporting the sheet in a direction parallel to its length along a heating element, the heating element being directed to the second surface of the sheet, heating the second surface with the heating element to at least partly melt the loops of the yarns to fasten the yarns to the sheet, wherein the method comprises transporting the sheet in contact with the heating element, wherein the heating element is a stationary rigid plate-like element having a width corresponding to the width of the sheet, and a length that extends parallel to the length of the sheet, the plate being curved in its length direction, wherein the outer circumference of the plate is contacted with the sheet. The invention also pertains to a method to use a textile product obtained with the new method and a device for applying the said method.
1. A method to manufacture a textile product comprising the steps of:
(a) providing a first sheet having a width and a length, and first and second surfaces,
(b) stitching polymer yarns through the first sheet to form a pile on the first surface of the first sheet and loops of the yarns at the second surface of the first sheet,
(c) transporting the first sheet in a direction parallel to the length of the first sheet along a heating element which is directed to the second surface of the first sheet such that the first sheet is in contact with the heating element along a contact length therebetween, wherein the contact length between the first sheet and the heating element is variable, and
(d) heating the second surface of the first sheet with the heating element to at least partly melt the loops of the yarns to fasten the yarns to the first sheet, wherein
the heating element is a stationary rigid plate-like element having a plate width corresponding to the width of the first sheet, and a plate length that extends parallel to the length of the first sheet, the plate-like element being curved in a direction of the plate length, wherein the plate-like element has an outer circumference in contact with the first sheet.
2. The method according to claim 1 , wherein step (c) is practiced by maintaining the pile in an uncompressed state for at least one-half of the contact length between the heating element and the first sheet.
3. The method according to claim 1 , wherein the curved plate-like element has a radius which is between 0.1 and 10 meters.
4. The method according to claim 1 , wherein the curved plate-like element has a radius which is between 0.2 and 2 meters.
5. The method according to claim 1 , which comprises heating the plate-like element by a warm liquid in thermal contact with the plate-like element.
6. The method according to claim 5 , which comprises:
(i) causing the liquid to flow through at least one canal in thermal contact with the plate-like element, and
(ii) forcing the liquid to travel in at least a first and a second canal neighboring the at least one canal such that a direction of the flow of the liquid in the first canal is opposite to a direction of flow of the liquid in the second canal.
7. The method according to claim 1 , which further comprises transporting the first sheet through a calendering nip at a section distal of the heating element.
8. The method according to claim 7 , which comprises maintaining the at least partly melted polymer yarns at the calendering nip at a temperature which is below a melting temperature of the polymer forming the yarns.
9. A method to manufacture a textile product comprising the steps of:
(a) providing a first sheet having a width and a length, and first and second surfaces,
(b) stitching polymer yarns through the first sheet to form a pile on the first surface of the first sheet and loops of the yarns at the second surface of the first sheet,
(c) transporting the first sheet in a direction parallel to the length of the first sheet along a heating element which is directed to the second surface of the first sheet such that the first sheet is in contact with the heating element along a contact length of therebetween,
(d) heating the second surface of the first sheet with the heating element to at least partly melt the loops of the yarns to fasten the yarns to the first sheet, and
(e) measuring roughness of the second surface of the first sheet after the at least partly melted loops of the yarns thereon have solidified and, in response to a measured surface roughness which differs from a predetermined surface roughness, adapting the heating of the second surface with the heating element in order to obtain a different surface roughness, wherein
the heating element is a stationary rigid plate-like element having a plate width corresponding to the width of the first sheet, and a plate length that extends parallel to the length of the first sheet, the plate-like element being curved in a direction of the plate length, wherein the plate-like element has an outer circumference in contact with the first sheet.