Patent ID: 12251860

EXAMPLES

1. Example 1

Particles of E-TPU 1180 G2 of different color (white and red) are introduced in layers into a hose of TPU nonwoven 25 g/m2. The hose is sealed under slight pre-tension. The hose is introduced loosely into a perforated, steam-permeable mold. The mold is inserted into a sheet mold and welded in an Erlenbach molding machine with steam as follows:Steam temperature: 105° C.Cross-steam 1: 2 s 0.5 barCross-steam 2: 2 s 0.5 barAutoclave, moving side: 2 s 1.6 barAutoclave, fixed side: 2 s 1.6 barResult: Molding loosely welded, density about 150 g/l, no movement of the particles apparent, TPU nonwoven barely still apparent (melted), particle structure not very pronounced.

2. Example 2

Particles of E-TPU 1180 G2 are introduced in a layered manner into a hose made of TPU 1195D nonwoven 150 g/m2. The hose is sealed under slight pre-tension. The hose is introduced loosely into a perforated, steam-permeable mold. The mold is inserted into a sheet mold and welded in an Erlenbach molding machine with steam as follows:Steam temperature: 110° C.Cross-steam 1: 2 s 0.8 barCross-steam 2: 2 s 0.8 barAutoclave, moving side: 2 s 1.6 barAutoclave, fixed side: 2 s 1.6 barResult: Molding loosely welded, density about 150 g/l, no movement of the particles apparent, TPU nonwoven still apparent. Particle structure not very pronounced. Tensile strength of the molding is 20% higher than a molding without the shell.

3. Example 3

Expanded particles of Ecoflex (biodegradable polyester from BASF SE) are introduced into a hose of Ecoflex Nonwoven 30 g/m2. The hose is sealed under slight pre-tension. The hose is introduced loosely into a perforated, steam-permeable mold. The mold is inserted into a sheet mold and welded in an Erlenbach molding machine with steam as follows:Steam temperature: 105° C.Cross-steam 1: 2 s 0.5 barCross-steam 2: 2 s 0.5 barAutoclave, moving side: 2 s 1.6 barAutoclave, fixed side: 2 s 1.6 barResult: Molding loosely welded, density about 150 g/l, no movement of the particles apparent, nonwoven barely still apparent (melted), particle structure not very pronounced.

4. Example 4

Particles of E-TPU 1180 G2 are introduced in a layered manner into a hose made of red TPU nonwoven 25 g/m2. The hose is sealed under slight pre-tension. The hose is introduced loosely into a perforated, steam-permeable mold. The mold is inserted into a sheet mold and welded in an Erlenbach molding machine with steam as follows:Steam temperature: 105° C.Cross-steam 1: 2 s 0.5 barCross-steam 2: 2 s 0.5 barAutoclave, moving side: 2 s 1.6 barAutoclave, fixed side: 2 s 1.6 barResult: Molding loosely welded, density about 150 g/l, TPU nonwoven structure barely still apparent (melted), the molding is red on the outside.

5. Example 5

Particles of E-TPU Infinergy of different color (white and red) are introduced manually in two layers into a hose (diameter 40 mm, length 150 mm, made of 15 den nylon weave). The hose is sealed under slight pre-tension. Subsequently, the hose is introduced into a steam-permeable metal mold of dimensions 200×200×60 mm. The mold is positioned in a round disk-shaped tool of diameter 300 mm, thickness 90 mm, and welded in an Erlenbach EHV-C 520/420 molding machine.Steam temperature: 105° C.Cross-steam 1: 2 s 0.5 barCross-steam 2: 2 s 0.5 barAutoclave, moving side: 2 s 1.6 barAutoclave, fixed side: 2 s 1.6 barResult: The molding was loosely welded with a density of 150 g/l, no shift in the particles is apparent, the nylon hose can be detached easily from the molding after the welding operation.

6. Example 6

Particles of E-TPU Infinergy of different color (white and red) are introduced manually in layers into multiple hoses made of 15 den nylon weave. The hoses are sealed under slight pre-tension and then introduced into a steam-permeable metal mold of dimensions 200×200×60 mm. The mold is positioned in a round disk-shaped tool of diameter 300 mm, thickness 90 mm, and welded in an Erlenbach EHV-C 520/420 molding machine.Steam temperature: 105° C.Cross-steam 1: 2 s 0.5 barCross-steam 2: 2 s 0.5 barAutoclave, moving side: 2 s 1.6 barAutoclave, fixed side: 2 s 1.6 barResult: The moldings were loosely welded with a density of 150 g/l, no movement of the hoses or particles relative to one another is apparent, the nylon hoses can be separated from one another, and the moldings can be removed easily from the hoses.

7. Example 7

Particles of E-TPU Infinergy of different color (white and red) are introduced manually in two layers into a hose (diameter 40 mm, length 150 mm, made of 15 den nylon weave). The hose is sealed under slight pre-tension. Subsequently, the hose is introduced into a steam-permeable metal mold of dimensions 200×200×60 mm. The mold is positioned in a round disk-shaped tool of diameter 300 mm, thickness 90 mm, and welded in an Erlenbach EHV-C 520/420 molding machine.Steam temperature: 115° C.Cross-steam 1: 2 s 0.5 barCross-steam 2: 2 s 0.5 barAutoclave, moving side: 2 s 1.6 barAutoclave, fixed side: 2 s 1.6 barResult: The molding was loosely welded with a density of 300 g/I without voids under compression, no shift in the particles is apparent, the nylon hose can be detached easily from the molding after the welding operation.

8. Example 8

Particles of Infinergy E-TPU 1180 G2 of different color (white and red) are inserted into a perforated, steam-permeable metal mold of dimensions 200×200×60 mm. The particles are positioned such that there is a sharp vertical separation of the red and white particle layers in 2 segments in the mold.

The mold is positioned in a round disk-shaped tool of diameter 300 mm, thickness 90 mm, and welded in an Erlenbach EHV-C 520/420 molding machine.Steam temperature: 105° C.Cross-steam 1: 2 s 0.5 barCross-steam 2: 2 s 0.5 barAutoclave, moving side: 2 s 1.6 barAutoclave, fixed side: 2 s 1.6 barResult: The molding was loosely welded with a density of 150 g/l, no shift in the particles is apparent, the molding can be easily removed from the metal mold after the welding operation.

9. Example 9 (Comparative Example)

Particles of Infinergy E-TPU 1180 G2 are inserted into a steam-impermeable polyethylene film of size 200×200×60 mm. The inlet at which the particles are introduced is welded in order to make the entire film steam-impermeable. The particles inserted are inserted into a square mold of size 200 mm*20 mm and contacted with steam in order to weld them.

The welding was effected in a molding machine from Kurtz ersa GmbH (Energy Foamer K68).Steam temperature: 150° C.Cross-steam 1: 40 s 1.3 barCross-steam 2: 20 s 1.1 barAutoclave, moving side: 10 s 0.8 barAutoclave, fixed side: 10 s 1.3 barResult: By comparison with examples 1 to 8, an elevated energy supply was used here (longer steam times and higher vapor pressures to some degree), which additionally promote welding. Nevertheless, the particles do not become welded in the steam-impermeable polyethylene film, but still remain loose in the film.

LITERATURE CITED

JP355228A2JP03097529MX 2006-GT0017