Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B21/14—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes
  • D04B21/18—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes incorporating elastic threads

Definitions

• the present invention relates to flat textile material, in the form of webs or parts made therefrom, which are to be processed into molded parts by pressing, deep-drawing or molding.
• the textile can, for. B. woven fabric, in particular it can be knitwear such as warp knit, Raschel knit, circular knit or circular knitwear, also pile or terry goods.
• the textile material according to the invention can, for. B. can be used in the automotive sector to obtain molded parts with it, such as headliners, door panels, hat racks or dashboards. It can also be used for deep-drawing hats or for molding bra cups in the bodice area.
• the flat textile material contains a synthetic yarn, the filaments of which have both a high elongation at break and a high residual elongation - permanent elongation.
• the use of such yarns is not common in the textile industry, so far yarns with a lower residual elongation have been used.
• yarns made of elastomers are used as yarns with a high elongation at break, which have a high elastic elongation but only a low residual elongation.
• the yarn to be used according to the invention is in particular a synthetic filament yarn; but it can also be an air-textured yarn with a core made of filaments with high elongation at break and high residual elongation. It is also possible to use a staple fiber yarn whose fibers - filaments - have high elongation at break and high residual elongation.
• the elongation at break of the filaments to be used according to the present invention should - measured in accordance with DIN 53834, Part 1 - be greater than 50%, in particular greater than 60%.
• the residual elongation - measured in accordance with DIN 53 835, Part 3 with a total elongation of 50%, a clamp speed of 250 mm / min and a pretensioning force of 0.5 cN / tex - should be greater than the elastic elongation, preferably greater than double the elastic stretch.
• Such flat textile material is optimally suitable for pressing onto molded parts due to the permanent stretch present in the goods.
• the pressed-in forms remain fully intact, which makes it possible for the textile goods to stick to the molded parts without annoying elastic tension. It is therefore also possible to use adhesives that have a significantly longer hardening phase than the adhesives currently required with short hardening times.
• the synthetic filaments to be used according to the invention with high elongation at break and high residual elongation can be produced in a known manner by spinning with pre-orientation or by partial drawing.
• the synthetic filaments can consist of the usual polymers for filaments, especially polyamide or especially polyester.
• the flat textile material can also contain one or more other yarns with customary elongation behavior, ie low elongation at break and / or low residual elongation, such as smooth or textured filament yarns, spun fiber yarns.
• the proportion of the filaments used according to the invention with high elongation at break and high residual elongation should be the load-bearing part of the textile material, that is, B. form the basic fabric in warp knitted fabrics.
• the flat textile material according to the invention can therefore also have foam lamination or film lamination.
• a polyester filament yarn dtex 50 f 35 was fully drawn into the laying rail 1, which had an elongation at break of 65% and a residual elongation of 40.4% at 50% total elongation (elongation ratio 0.24).
• the laying rail worked l22 / 232 / 2l2 / 232 / 2ll / l0l / l2l / l0l //.
• lay rail 2 were 2 textured polyamide-polyester mixed filament yarns dtex ll0, one of which (A, elongation at break 26%) and polyamide Polyester filaments in a weight ratio of 30:70 and the other (B, elongation at break 30%) in a weight ratio of 57:43 contained, as a result, 3 Fd. A, 3 Fd. B, 1 Fd. A, 2 Fd. B, 2 Fd A, l Fd. B moved in.
• Laying rail 2 worked 344/676/232/676/433 / l0l / 454 / l0l //.
• the raw material worked with a mesh size of 28 cm ⁇ 1 had a weight of 250 g m ⁇ 2. After finishing and coloring, the weight of the goods was 305 g m2.
• the elongation at maximum tensile force was 74% in the longitudinal direction and 100% in the transverse direction determined, with 65% total elongation the residual elongation in the longitudinal direction with 4l%, in the transverse direction with 3l%.
• the product was well suited for door panels in the automotive industry.
• a four-rail warp knitted fabric was produced with the same thread and the same insertion of the laying rail 1 as in example 1.
• the laying rail worked l0l / l2l //.
• Laying rails 2 and 3 had polyester filament yarn dtex l67 f 35, textured (elongation at break 26%) on every fourth needle moved in.
• Laying rail 2 worked l0l / 444/000/444 / l0l / 232 / l0l / 232 //, rail 3 l0l / 232 / l0l / 232 / l0l / 444/000 / 444 //.
• Laying rail 4 had polyamide 6 filament yarn dtex 67 f l5, smooth (elongation at break 31%) drawn in on each needle; the laying rail worked l0l / 454 //.
• the raw material obtained had a raw weight of 200 g m ⁇ 2 with a mesh size of 22 cm ⁇ 1, after finishing and dyeing 250 g m ⁇ 2.
• the elongation at maximum tensile force was 82% in the longitudinal direction, 76% in the transverse direction, the residual elongation at 65% total elongation in the longitudinal direction 32%, in the transverse direction 31%.
• the product was also particularly suitable for door panels in automobile construction.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Knitting Of Fabric (AREA)
• Laminated Bodies (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=6297411

Family Applications (1)

Country Status (2)

Cited By (1)

Citations (3)

Family Cites Families (5)

• 1986
  • 1986-03-27 DE DE19863610381 patent/DE3610381A1/de not_active Ceased
• 1987
  • 1987-03-13 EP EP87103667A patent/EP0238950A3/fr not_active Withdrawn

Patent Citations (3)

Non-Patent Citations (1)

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