BIO-BASED ELASTOMER COMPOSITION AND FILM AND LAMINATE PREPARED THEREFROM

Abstract

The present invention discloses a composition for preparing bio-based elastomer film with high moisture permeability, and a bio-based elastomer film and a laminate therefrom, wherein the composition comprises: 5%-95% bio-based elastomer material, 0-80% resin polymer, 0.01-90% inorganic powder material having a particle size within 100 μm and/or organic low molecular material having a molecular weight within 2000 Daltons, and 0-10% organic anti-blocking agent (dispersant). The bio-based elastomer film and laminate of the present invention have excellent moisture permeability and mechanical performance, which can be widely used in various fields including outdoor sporting goods, clothing, medical treatment, food packaging and shoe materials, and which are environmentally friendly and green products.

Claims

1. A composition for preparing a bio-based elastomer film with high moisture permeability, wherein the composition comprises: 5% -95% bio-based elastomer material, 0-80% resin polymer, 0.01-90% inorganic powder material having a particle size within 100 μm and/or organic low molecular material having a molecular weight within 2000 Daltons, and 0-10% organic dispersant.

2. The composition according to claim 1, wherein the bio-based elastomer material contains a proportion of bio-based components of 1-100%, preferably 1-95% and more preferably 10-80%.

3. The composition according to claim 1, wherein the resin polymer is any polymer, derivatives thereof and any combination thereof, preferably it is one or more polymer selected from the group consisting of polyether, polyolefin, polyurethane, nylon, polyethylene terephthalate, polybutylene terephthalate, polyether ester and their derivatives.

4. The composition according to claim 1, wherein the inorganic powder material is one or more inorganic powder selected from the group consisting of titanium dioxide, silicon dioxide, montmorillonite, various inorganic pigments, calcium carbonate, barium sulfate white, ceramic powder and magnesium hydroxide, and the organic dispersant is one or more organic material selected from the group consisting of paraffin, fatty acid, aliphatic amide, ester, metal soap, and low molecular wax.

5. A bio-based elastomer film prepared from the composition according to claim 1 with a thickness of 1-500 μm, preferably 2-150 μm, more preferably 2-50 μm, wherein said film is a co-extruded multi-layer structure or a single-layer structure, and wherein said film has a moisture permeability of 100,000 g/m.sup.2*24 h or more (based on JIS L1099 B1 method), preferably 120,000 g/m.sup.2*24 h or more.

6. The bio-based elastomer film according to claim 5, wherein said film has a breaking elongation of greater than 300% and an elastic modulus of less than 500 MPa.

7. A laminate of thermoplastic resin film, wherein said laminate comprises at least one layer of the bio-based elastomer film according to claim 5, at least one layer of thermoplastic resin products, and an adhesive layer formed by a glue which is located between said layer of the bio-based elastomer film and said layer of the thermoplastic resin product, wherein said layer of the thermoplastic resin product is a thermoplastic resin film or a thermoplastic resin fiber product, which is textile fiber and/or non-woven fabric (non-spunbond non-woven fabric or material containing spunbond non-woven fabric).

8. The laminate according to claim 7, wherein one or more layers of said textile fiber are fiber material selected from the group consisting of polyether ester and its derivatives, polyester and its derivatives, nylon and its derivatives, polyurethane and its derivatives, polypropylene and its derivatives, and any combination thereof, and wherein one or more layers of said non-woven fabric are selected from the group consisting of polyolefin and its derivatives, polyester and its derivatives, nylon and its derivatives, and biodegradable plant fiber and its derivatives, preferably polypropylene and its derivatives, polyester and its derivatives, and biodegradable plant fiber and its derivatives.

9. The laminate according to claim 7, wherein the adhesive layer is a discontinuous layer, preferably a discontinuous dot layer, a spaced strip layer, or a grid-like layer.

10. The laminate according to claim 7, wherein the laminate has a moisture permeability of 25,000 g/m.sup.2*24 h or more, preferably a moisture permeability of 30,000 g/m.sup.2*24 h or more, and more preferably a moisture permeability between 30,000-80,000 g/m.sup.2*24 h.

Description

DRAWINGS

[0052] FIG. 1 is a schematic diagram of a single-layer extrusion stretching process according to an Example of the present invention;

[0053] FIG. 2 is a schematic diagram of a two or multilayer extrusion stretching process according to another Example of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0054] The present invention is described in further detail in combination with various examples below, in which the raw material supplier of the bio-based elastomer material used is the Pebax or EMS, of Arkema, for example, its bio-based nylon elastomer material.

Examples 1˜10

[0055] As shown in Table 1, the formula mixtures of Examples 1 to 10, with the melting point measured by thermal analysis instrument DSC, were directly made into a two-layer film by melt co-extrusion (see FIG. 2) with a processing temperature between 160° C. and 290° C. After surface processing, side cutting and bundling, a matte film of 20 μm in thickness was finally prepared at a production speed of 30 m/min. Formula 7 corresponded to a white matte film of 20 μm, and formulas 5, 6, 8 and 10 corresponded to fragrant matte white films of 20 μm. Specific performance tests are shown in Table 2. These Examples exhibited different melting points, in which the melting points of Examples 1-4 were lower than that of other Examples and that of Examples 5-7 were higher than that of Examples 8-10. Examples 1-2 showed that proper photothermal stabilizers improved thermal stability, toughness, etc. Compared with Example 3, Example 4 showed a significant increase on the moisture permeability, but a decrease both on the breaking elongation and on the elastic recovery. The appearance of Example 6 was significantly better than that of Example 5, and its breaking elongation rate was improved, but still much lower than that of other Examples with a better thermal stability and a decreased elastic recovery. The breaking elongation of Example 7 was close to normal, its thermal stability remains close to that of Example 6, its moisture permeability was higher than other Examples, and its elastic recovery decreased slightly. Examples 8-10 were fragrant films, and the addition of fragrant component(s) did not affect the moisture permeability of the product, but the elastic modulus increased slightly. Compared with Examples 8-9, due to the addition of the chain extender, the moisture permeability of Example 10 increased slightly, the breaking elongation increased, the elastic modulus increased slightly, and the thermal stability increased.

Examples 11˜12

[0056] As shown in Table 1, the formula mixture of Example 7, with the melting point measured by thermal analysis instrument DSC, was first granulated, and then in Example 11 made into a two-layer film by melt co-extrusion (see FIG. 2) at processing temperature between 160° C. and 290° C. and in Example 12 made into a single-layer film by melt extrusion at processing temperature between 190° C. and 230° C. After surface processing, side cutting and bundling, a matte film of 20 μm in thickness was finally prepared at a production speed of 35 m/min. Specific performance tests are shown in Table 3 and compared with Example 7. Both the breaking elongation and the elastic recovery of Example 7 decreased as compared with Examples 11 and 12, indicating that the inorganic powder was well dispersed after granulation.

Examples 13˜15

[0057] As shown in Table 1, the formula mixture of Example 10, with the melting point measured by thermal analysis instrument DSC, was first granulated and then made into a single-layer film by melt extrusion (FIG. 1) with a processing temperature between 160° C. and 290° C. After surface processing, side cutting and bundling, a colorless matte film of 20 μm was finally prepared in Example 13, a light white film of 20 μm was finally prepared in Example 14 and a matte film of 5 μm was finally prepared in Example 15 at a production speed of 30 m/min. Specific performance tests are shown in Table 3. After comparison, the moisture permeability of Example 14<that of Example 13<that of 15, the breaking elongation of Example 14>that of Example 13>that of Example 15, and elastic recovery of Example 14>that of Example 13>that of Example 15.

Examples 16˜17

[0058] As shown in Table 1, the formula mixture of Example 10, with the melting point measured by thermal analysis instrument DSC, was first granulated, and then made into a two-layer film by melt co-extrusion (see FIG. 2). In Example 16 the processing temperature was 160° C.-290° C., while in Example 17 the processing temperature was 200° C.-250° C. After surface processing, side cutting and bundling, a white matte film of 5 μm was finally prepared in Example 16 at a production speed of 40 m/min, and a white matte film of 8 μm was finally prepared in Example 17 at a production speed of 40 m/min. Specific performance tests are shown in Table 3. Compared with Example 15, the breaking elongation and elastic recovery decreased. In Example 17 the thickness increased significantly, its breaking elongation increased, and its moisture permeability decreased.

Examples 18˜19

[0059] As shown in Table 1, the formula mixture of Example 1, with the melting point measured by a thermal analysis instrument DSC, was first granulated, and then in Example 18 made into a two-layer film by melt co-extrusion (see FIG. 2) at a production speed of 35 m/min and in Example 19 made into a three-layer film by melt co-extrusion at a production speed of 40 m/min. The processing temperature was between 160° C. and 290° C. After surface processing, side cutting and bundling, a colorless matte film of 20 μm in thickness was finally prepared. Specific performance tests are shown in Table 3. Compared with Example 1, it showed that the breaking elongation decreased slightly when the formula of Example 1 was granulated, but the film production speeds of Example 18 and Example 19 also had to be increased for obtaining a film with same thickness, and the film production speed of Example 18 was lower than that of Example 19.

Examples 20˜23

[0060] As shown in Table 1, the formula mixture of Example 1, with the melting point measured by a thermal analysis instrument DSC, is directly made into a two-layer film by melt co-extrusion (see FIG. 2) with a processing temperature between 160° C. and 290° C. In Example 20 after surface processing, 130° C. high temperature ripening, side cutting and bundling, a matte film of 20 μm was finally prepared at a production speed of 30 m/min, which had high toughness, high moisture permeability and high elastic recovery. In Example 21 after surface processing, applying back adhesive, 130° C. high temperature ripening, side cutting and bundling, a matte film of 20 μm with high toughness was finally prepared at a production speed of 30 m/min, in which back adhesive was applied continuously with a solvent glue. In Example 22 the film production procedure was same with that of Example 20, but the production speed was 40 m/min. In Example 23 the film production procedure was same with that of Example 21, but back adhesive was applied in a dotted manner with a solvent glue. Specific performance tests are shown in Table 4. Compared with Example 1, the moisture permeability in Example 20 and 22 was significantly improved, and both the elastic recovery and the toughness were also enhanced a lot. The performance of Example 22 was slightly lower than that of Example 20, indicating that the production speed affected the performance resulted from the intermediate special process. Example 21 and 23 were back adhesive films, and the moisture permeability decreased significantly, and the hand feel stiffened significantly, especially in Example 21 in which the moisture permeability was almost disappeared.

TABLE-US-00001 TABLE 1 Formulas of Examples 1-23 Example Example Example Example Example Example Example Example Example Example Formula, wt % 1 2 3 4 5 6 7 8 9 10 bio-based nylon 90 80 70 60 50 40 30 20 10 5 elastomer material resin polymer 0 5 10 20 30 40 50 60 70 80 inorganic powder 10 10 10 10 9 9 8 8 7 5 material organic low molecular 0 5 10 10 11 11 12 12 13 10 material organic dispersant 0.4 0.5 0.5 0.6 0.6 0.7 0.7 0.8 0.8 0.4 Formula, wt % Examples Examples Examples Examples Examples 11~12 13~15 16~17 18~19 20~23 bio-based nylon same as Example same as Example 10 same as Example 10 same as Example same as Example 7 1 1 elastomer material resin polymer inorganic powder material organic low molecular material organic dispersant

TABLE-US-00002 TABLE 2 Performances of Examples 1-10 Example Example Example Example Example Example Example Example Example Example performance unit 1 2 3 4 5 6 7 8 9 10 color — matte matte matte matte white white white white matte white matte matte matte matte matte thickness μm 20 20 20 20 20 20 20 20 20 20 odour — — — — — fragrant fragrant — fragrant — fragrant melting point DSC ° C. 185 190 182 189 200 220 232 194 198 195 thermal stability % +2 +3 +4 +3 +2 +0 +1 +3 +4 +2 (173° C., 60 s) moisture permeability g/m.sup.2 * 24 h 109000 105000 100000 140000 110000 115000 145000 112000 106000 126000 JIS L1099 Bl breaking elongation % 406 411 410 400 301 340 400 412 409 430 elastic recovery % 45.6 46.2 46.7 46.2 46.1 45.0 46.7 46.3 46.2 45.8 elastic modulus MPa 90/100 70/80 82/95 100/110 119/125 110/120 100/110 95/105 100/115 110/125 ASTM D828 (vertical/horizontal)

TABLE-US-00003 TABLE 3 Performances of Examples 11-19 Example Example Example Example Example Example Example Example Example performance unit 11 12 13 14 15 16 17 18 19 color — matte matte colorless glazing matte white white colorless colorless matte white matte matte matte matte thickness μm 20 20 20 20 5 5 8 20 20 odor — — — — — — — — — — melting point DSC ° C. 232 232 195 195 195 195 195 185 185 thermal stability % +2 +2 +1 +4 +2 +0 +4 +0 +1 (173° C., 60 s) moisture permeability g/m.sup.2*24 h 150000 152000 155000 148000 160000 144000 134000 120000 125000 JIS L1099 Bl breaking elongation % 422 430 440 460 431 400 420 399 400 elastic recovery % 47.7 47.8 47.8 48.8 46.5 44.2 44.0 35.6 43.2 elastic modulus MPa 100/110 95/110 90/110 80/100 110/120 119/130 120/135 130/140 140/150 ASTM D828 (vertical/horizontal)

TABLE-US-00004 TABLE 4 Performances of Examples 20-23 Example Example Example Example performance unit 20 21 22 23 color — matte matte matte matte thickness μm 20 20 20 20 odor — — — — — melting point DSC ° C. 185 185 185 185 thermal stability % +2 +0 +3 +0 (173° C., 60 s) moisture permeability g/m.sup.2*24 h 130000 1000 140000 80000 JIS L1099 B1 breaking elongation % 420 220 430 300 elastic recovery % 47.2 25.0 47.8 22.0 elastic modulus MPa 95/100 300/400 80/95 250/300 ASTM D828 (vertical/horizontal)