Tube

Abstract

A tube for receiving a liquid or pasty product comprising a multilayered tube jacket, the tube jacket having one or more outer layer(s) made of polyolefin, one or more inner layer(s) made of polyolefin and a barrier layer arranged between the outer layer(s) and the inner layer(s), wherein the barrier layer consists of an ethylene-vinyl alcohol copolymer (EVOH), and wherein the ethylene-vinyl alcohol copolymer of the barrier layer has an ethylene content of <35 mol % and the thickness of the barrier layer is ≤25 μm.

Claims

1. A tube for receiving and containing a liquid or pasty cosmetic or personal care product to be dispensed, the tube comprising a multilayered tube jacket, the multilayered tube jacket having one or more outer layer(s) made of polyolefin, one or more inner layer(s) made of polyolefin and a barrier layer arranged between the one or more outer layer(s) and the one or more inner layer(s), wherein the one or more outer layer(s) has or have a total thickness of 80-300 μm, wherein the barrier layer consists of an ethylene-vinyl alcohol copolymer (EVOH), wherein the ethylene-vinyl alcohol copolymer of the barrier layer has an ethylene content of <35 mol % and a thickness of the barrier layer is ≤25 μm, and wherein the one or more outer layer(s) and/or the one or more inner layers consist(s) of polyethylene (PE), wherein the polyethylene of the one or more outer layer(s) and/or the one or more inner layers has a proportion of at least 20% by weight of high-density polyethylene (PE-HD), and wherein the high-density polyethylene (PE-HD) has weight between 0.935 and 0.97 g/cm3.

2. The tube according to claim 1, wherein the thickness of the barrier layer is between 5 and 25 μm.

3. The tube according to claim 1, wherein a bonding layer is arranged on both sides of the barrier layer in direct contact with the same.

4. The tube according to claim 3, wherein the thickness of the bonding layer is 5-25 μm.

5. The tube according to claim 3, wherein the thickness of the bonding layer is 10-20 μm.

6. The tube according to claim 1, wherein the one or more inner layers has or have a total thickness of 80-300 μm.

7. The tube according to claim 1, wherein the multilayered tube jacket has a total thickness of 200-600 μm.

8. The tube according to claim 1, wherein a total thickness of the one or more outer layers is 30-70% of a total thickness of the multilayered tube jacket.

9. The tube according to claim 1, wherein a total thickness of the one or more inner layers is 30-70% of a total thickness of the multilayered tube jacket.

10. The tube according to claim 1, wherein the multilayered tube jacket is produced by coextrusion.

11. The tube according to claim 1, wherein the multilayered tube jacket has an outer diameter of 13-60 mm.

12. The tube according to claim 11, wherein the multilayered tube jacket has an outer diameter of 25-50 mm.

Description

EXAMPLE 1

(1) A tube jacket with the following structure was produced by coextrusion:

(2) TABLE-US-00001 Layer Material Thickness Outer layer 80% PE-LLD, 20% PE-LD 120 μm Barrier layer EVOH (EVAL F101B from 20 μm EVAL Europe N.V.) with an ethylene content of 32 mol % Inner layer 50% PE-HD, 50% PE-LLD 120 μm

(3) The outer diameter of the tube jacket was 40 mm, the jacket length 107 mm. A bonding layer (Admer NF 498E from Mitsui Chemicals Europe GmbH) with a thickness of 20 μm was each arranged between the inner layer and the barrier layer and between the outer layer and the barrier layer. The wall thickness was thus 300 μm.

EXAMPLE 2

(4) A tube jacket with the following structure was produced by coextrusion:

(5) TABLE-US-00002 Layer Material Thickness Outer layer 80% PE-LLD, 20% PE-LD 220 μm Barrier layer EVOH (EVAL F101B from 20 μm EVAL Europe N.V.) with an ethylene content of 32 mol % Inner layer 50% PE-HD, 50% PE-LLD 220 μm

(6) The outer diameter of the tube jacket was 40 mm, the jacket length 107 mm. A bonding layer (Admer NF 498E from Mitsui Chemicals Europe GmbH) with a thickness of 20 μm was each arranged between the inner layer and the barrier layer and between the outer layer and the barrier layer. The wall thickness was thus 500 μm.

EXAMPLE 3

(7) TABLE-US-00003 Layer Material Thickness Outer layer 80% PE-LLD, 20% PE-LD 135 μm Barrier layer EVOH (EVAL L171B from 10 μm EVAL Europe N.V.) with an ethylene content of 27 mol % Inner layer 50% PE-HD, 50% PE-LLD 135 μm

(8) The outer diameter of the tube jacket was 40 mm, the jacket length 107 mm. A bonding layer (Admer NF 498E from Mitsui Chemicals Europe GmbH) with a thickness of 10 μm was each arranged between the inner layer and the barrier layer and between the outer layer and the barrier layer. The wall thickness was thus 300 μm.

EXAMPLE 4

(9) A tube jacket with the following structure was produced by coextrusion:

(10) TABLE-US-00004 Layer Material Thickness Outer layer 80% PE-LLD, 20% PE-LD 235 μm Barrier layer EVOH (EVAL L171B from 10 μm EVAL Europe N.V.) with an ethylene content of 27 mol % Inner layer 50% PE-HD, 50% PE-LLD 235 μm

(11) The outer diameter of the tube jacket was 40 mm, the jacket length 107 mm. A bonding layer (Admer NF 498E from Mitsui Chemicals Europe GmbH) with a thickness of 10 μm was each arranged between the inner layer and the barrier layer and between the outer layer and the barrier layer. The wall thickness was thus 500 μm.

EXAMPLE 5

(12) A tube jacket with the following structure was produced by coextrusion:

(13) TABLE-US-00005 Layer Material Thickness Outer layer 80% PE-LLD, 20% PE-LD 120 μm Barrier layer EVOH (EVAL L171B from 20 μm EVAL Europe N.V.) with an ethylene content of 27 mol % Inner layer 50% PE-HD, 50% PE-LLD 120 μm

(14) The outer diameter of the tube jacket was 40 mm, the jacket length 107 mm. A bonding layer (Admer NF 498E from Mitsui Chemicals Europe GmbH) with a thickness of 20 μm was each arranged between the inner layer and the barrier layer and between the outer layer and the barrier layer. The wall thickness was thus 300 μm.

EXAMPLE 6

(15) A tube jacket with the following structure was produced by coextrusion:

(16) TABLE-US-00006 Layer Material Thickness Outer layer 80% PE-LLD, 20% PE-LD 220 μm Barrier layer EVOH (EVAL L171B from 20 μm EVAL Europe N.V.) with an ethylene content of 27 mol % Inner layer 50% PE-HD, 50% PE-LLD 220 μm

(17) The outer diameter of the tube jacket was 40 mm, the jacket length 107 mm. A bonding layer (Admer NF 498E from Mitsui Chemicals Europe GmbH) with a thickness of 20 μm was each arranged between the inner layer and the barrier layer and between the outer layer and the barrier layer. The wall thickness was thus 500 μm.

(18) The tube jackets produced according to the specifications given in Examples 2-6 were tested with regard to their barrier properties and their inherent stability. The test of the oxygen transmission was carried out based on the following standard: DIN 53380-3 Determination of gas permeability; Part 3: Oxygen-specific carrier gas method for measuring plastic films and plastic molded parts. One side (outside) of the test specimen is exposed to test gas with a certain oxygen content under atmospheric pressure. On the other side (inside) of the specimen, which is tightly separated from the first side, the oxygen that has diffused through is “taken along” by the carrier gas (N.sub.2) and transported to an O.sub.2 sensor. The temperature of the sample or the sample chamber was set at 40° C. and the moisture content of the test gas was 0%.

(19) The following O.sub.2 transmission values were measured:

(20) TABLE-US-00007 Thickness Wall of the thickness barrier of the tube Ethylene O2 layer jacket content transmission Ex. [μm] [μm] [mol %] [cm3/tube/day] 2 20 500 32 0.0058 3 10 300 27 0.0029 4 10 500 27 0.0022 5 20 300 27 0.0014 6 20 500 27 0.0012

(21) It was found that the tube jackets had sufficient barrier properties. In particular, the influence of the ethylene content on the barrier property of the barrier layer was shown, a comparison of Examples 2 and 3 showing that the O.sub.2 transmission of the tube according to Example 3 is significantly lower, although both the thickness of the barrier layer and the wall thickness of the tube jacket in Example 2 is larger.