Sheet material having a sustainable adhesive coating

Abstract

The present invention discloses a heat-sealable textile sheet material having a substrate on the basis of a woven fabric, knitted fabric, optionally with weft insertion, or a nonwoven fabric and an adhesive coating applied thereto, which is characterized in that 70-100% by weight of the adhesive coating consists of renewable raw materials.

Claims

1. A heat-sealable textile sheet material having a substrate formed as one of a woven fabric, knitted fabric, and a nonwoven fabric, and an adhesive coating applied thereto, wherein the adhesive coating is applied in the form of an upper and lower dots, 70-100 wt.% of the adhesive coating consists of renewable raw materials, wherein the lower dot is made of an the adhesive composition of up to 100% renewable raw materials having a bio-based polyelectrolyte complex composition combined with carbohydrates.

2. The heat-sealable textile sheet material according to claim 1, wherein the adhesive composition has a dynamic viscosity of 8-30 Pas, as measured with a rotational viscometer.

3. The heat-sealable textile sheet material according to claim 1 wherein the bio-based polyelectrolyte complex composition contains chitosan, carboxymethyl cellulose and an organic acid.

4. The heat-sealable textile sheet material according to claim 1, wherein the adhesive composition contains at most about 50 wt. % of the polyelectrolyte complex, 10-30 wt. % of the flow aid and 15-20 wt. % of modified starch.

5. The heat-sealable textile sheet material according to claim 4, wherein the adhesive composition further contains at least one of water and brighteners.

6. The heat-sealable textile sheet material according to claim 1, in combination with one of apparel and technical textiles.

7. The heat-sealable textile sheet material according to claim 6, wherein the technical textile is included in at least one of furniture and upholstery.

8. The heat-sealable textile sheet material according to claim 1, wherein the renewable raw materials are further combined with at least one of thickeners, crosslinkers, flow aids and optical brighteners.

9. The heat-sealable textile sheet material according to claim 8, wherein the thickeners are selected from mineral and organic thickeners.

Description

EXAMPLE 1

(1) The following adhesive composition was prepared.

(2) Composition of a Lower Dot for a Grid Coating:

(3) TABLE-US-00001 Polyelectrolyte complex composition 46.88 wt %. (OC-Biobinder? OAK-Organoclick-100% renewable raw materials: Chitosan, carboxymethyl cellulose, citric acid, water). Modified starch (modification with monophosphate) 15.62 wt. % (Aric 4574-Agrana->95% renewable raw materials) Propylene glycol vegetable (Radianol 4710-Oleon- 25.00 wt. % 100% renewable raw materials) Water 12.50%
Dynamic viscosity: 13 Pas
Composition for the Upper Dot as a Scattering Powder:
Copolyamide (80-200 ?m) (Platamid 2667Arkemaproportion of renewable raw materials 60 wt. %)
Lower/upper dot ratio: 5/5 (weight)
Proportion of renewable raw materials in the total adhesive composition: 80%.

(4) This adhesive composition is applied to a cotton fabric with a basis weight of 58 g/m.sup.2. The paste dot is applied by stencil screen printing (Cp52/0.5, Cp52=52 arbitrarily/randomly arranged (computer) dots/100 mm.sup.2 0.5=diameter of the dots in mm). The copolyamide powder is scattered onto the still wet paste dot in the conventional way, the excess is sucked off and the sheet material is then dried at 180? C.

(5) Adhesion Values

(6) Application weight: 18 g/m.sup.2Fusing temperature: 155? C., 15 s, 20 N/cm.sup.2 (Kannegiesser CV 1000 CF belt fusing press)

(7) Adhesion to 100% cotton test fabric: 11 N/5 cm

(8) Adhesion to 97/3 wool/elastane test fabric: 11 N/5 cm

(9) Back riveting 0 N/5 cm

(10) Wash Resistance/Adhesion after Washing:

(11) Application weight: 18 g/m.sup.2Fusing temperature: 155? C., 15 s, 20 N/cm.sup.2 (Kannegiesser CV 1000 CF belt fusing press)

(12) TABLE-US-00002 Adhesion to 100% cotton test fabric (women's outerwear; 10 N/5 cm 95 g/m.sup.2) after 3x washing at 30? C. Adhesion to 97/3 wool/elastane test fabric (men's outerwear; 9 N/5 cm 185 g/m.sup.2) after 3x washing at 30? C. Adhesion to 100% cotton test fabric test fabric after 3x 9 N/5 cm washing at 60? C.
Aging Resistance:
Application weight: 18 g/m.sup.2Fusing temperature: 155? C., 15 s, 20 N/cm.sup.2 (Kannegiesser CV 1000 CF belt fusing press)
Sample fixed on 100% cotton test fabric 0 weeks: 11 N/5 cm 4 weeks 60? C./dry: 11 N/5 cm 4 weeks 60? C./humid: 10 N/5 cm
Sample fixed on 97/3 wool/elastane test fabric 0 weeks: 11 N/5 cm 4 weeks 60? C./dry: 10 N/5 cm 4 weeks 60? C./humid: 9 N/5 cm
Sample unfixed after 4 weeks 60? C./dry Adhesion to 100% cotton test fabric 10 N/5 cm Adhesion to 97/3 wool/elastane test fabric 10 N/5 cm
Sample unfixed after 4 weeks 60? C./humid Adhesion to 100% cotton test fabric 10 N/5 cm Adhesion to 97/3 wool/elastane test fabric 9 N/5 cm

COMPARISON EXAMPLE 1

(13) Composition Paste Dot:

(14) TABLE-US-00003 Polyelectrolyte complex composition 96.00 wt. % (OC-Biobinder? OAK-Organoclick-100% renewable raw materials) Silica gel as thickener 4.00 wt. % (HDK N 20-Wacker)
Dynamic viscosity: 15 Pas
Upper Dot (Scattering Powder):
Copolyamide (80-200 ?m) (Platamid 2667Arkemaproportion of renewable raw materials 60 wt. %)
Lower/upper dot ratio: 5/5 (weight)
Proportion of renewable raw materials of the adhesive composition: 80 wt. %.

(15) This adhesive composition is applied to a cotton fabric with a basis weight of 58 g/m.sup.2. The paste dot is applied by stencil screen printing (Cp52/0.5). The copolyamide powder is scattered onto the still wet paste dot, the excess is sucked off, and the sheet material is then dried at 180? C.

(16) Application weight: 15 g/m.sup.2Fusing temperature: 155? C., 15 s, 20 N/cm.sup.2 (Kannegiesser CV 1000 CF belt fusing press)

(17) Adhesion to 100% cotton test fabric (as in example 1): 10 N/5 cm

(18) Adhesion to 97/3 wool/elastane test fabric (as in example 1) 11 N/5 cm

(19) Wash Resistance:

(20) TABLE-US-00004 Adhesion to 100% cotton test fabric after 8 N/5 cm 3x washing at 60? C. Adhesion to 97/3 wool/elastane test fabric after 3x washing at 60? C. 9 N/5 cm

(21) The sheet material according to comparison example 1 has a hard, stiff feel, and a bleed-through or sinking of the dot into the cotton fabric was also observed. Particularly disadvantageous is the rapid drying of the composition on the stencil, which leads to defects in the coating pattern and an irregular application. This shows that the composition leads to poor results because it does not contain modified starch and also no flow aid.

EXAMPLE 2

(22) Coating of 25 g/m.sup.2 PES nonwoven fabric with paste dot composition from example 1 and a conventional copolyamide powder (Mp. 118-128? C.Schaettifix 5130)

(23) Adhesion:

(24) Application weight: 10 g/m.sup.2Fusing temperature: 127? C., 15 s, 20 N/cm.sup.2 (Kannegiesser CV 1000 CF belt fusing press)

(25) Adhesion to 100% cotton test fabric (as in example 1): 5 N/5 cmnonwoven fabric tears Adhesion to 97/3 wool/elastane test fabric: 5 N/5 cmnonwoven fabric tears
Wash Resistance: Adhesion to 100% cotton test fabric after 3?40? C. Wash: 5 N/5 cmnonwoven fabric tears Adhesion to 97/3 wool/elastane test fabric after 3?40? C. Wash: 5 N/5 cmnonwoven fabric tears

(26) This example shows that the adhesion of the paste dot to the cotton test fabric is higher than the interlining or the coated PES nonwoven fabric itself.

EXAMPLE 3

(27) Coating of 50 g/m.sup.2 organic cotton nonwoven fabric with paste dot composition of example 1 and copolyamide powder (80-200 ?m) (Platamid 2667Arkemaproportion of renewable raw materials 60 wt. %)

(28) Application weight: 13 g/m.sup.2Lower/upper dot ratio: 4/6 (weight)Fusing temperature: 150? C., 15 s, 20 N/cm.sup.2 (Kannegiesser CV 1000 CF belt fusing press)

(29) Proportion of renewable raw materials in the total adhesive composition: 75 wt. %.

(30) Adhesion to 100% cotton test fabric (as in example 1): 15 N/5 cmnonwoven fabric tears Adhesion to 97/3% wool/elastane test fabric (as in example 1): 12 N/5 cmnonwoven fabric tears
Wash Resistance: Adhesion to 100% cotton test fabric (as in example 1) after 3?40? C. wash: 11 N/5 cmnonwoven fabric tears Adhesion to 97/3% wool/elastane test fabric after 3?40? C. wash: 12 N/5 cmnonwoven fabric tears

(31) This example also shows that the adhesive composition has a high adhesion to the nonwoven fabric, which is maintained until the nonwoven fabric tears.