Absorbent articles comprising thermoplastic coated superabsorbent polymer materials
A technology of water-absorbing polymers and articles, applied in the direction of adhesive dressings, dressings, absorbent pads, etc., can solve problems such as unsatisfactory, reduced capacity, and reduced capacity
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Embodiment 4-5
[0238] According to Table 3 of Examples 4 and 5, 3000 grams of the pre-product of Example 1 were blended at ambient conditions with a 25% aqueous emulsion of a blend of maleinized polypropylene and ethylene acrylic acid copolymer. In particular, the pre-product of Example 1 was fluidized. Spray solutions were prepared by dissolving ethylene carbonate in hot water and adding maleinated polypropylene to the solution in the amounts given in Table 3 instead of ethylene acrylic acid copolymer. The spray solution is sprayed onto the fluidized pre-product. Then, 24.0 grams of fumed silica was added onto the sprayed pre-product. The total mixture was fluidized for about 1 minute. The ethylene carbonate / thermoplastic / water coating pre-product was fed to the continuous paddle dryer at 60-70 g / min for 50 minutes, the superabsorbent peak was reached near the middle of the second half of the reactor temperature, and maintain the temperature to 190-195°C. Keep the paddle at 25rpm.
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Embodiment 6-12
[0248] These stretchable water absorbent core samples were prepared on a pilot co-former and had a composite width of about inches (13.0 centimeters). Three superabsorbents were selected: FAVORSXM 9394 (commercially available from Stockhausen Corporation, having a place of business in Greensboro, NC, USA), the superabsorbent material of Example 3 as described above, the superabsorbent of Example 5 as described above material, blended with a polypropylene-based thermoplastic elastomeric polymer having a melt flow rate (MFR) of about 80 (available as a product from ExxonMobil Chemical Company) and wood pulp fiber NF 405 commercially available from Weyerhaeuser Company water absorbent core. The compositions and process conditions of Examples 6-12 are listed in Tables 5 and 6.
[0249] Table 5. Core composition
[0250]
[0251] Table 6 - Process Conditions
[0252] parameter
value
Die
hole diameter
0.02 inches
Die hole
24 inches e...
Embodiment 13-19
[0259] The stretchable water absorbent cores of these examples were prepared using the experimental coformer described above. The water absorbent cores of these examples also had a composite width (ie, CD direction) of about 5.5 inches (13.0 cm). Further improvements in balancing superabsorbent adhesion and fluid handling properties were achieved by using different grades of elastic polymers and different contents of wood pulp fibers. An example of these thermoplastic elastomeric polymers is VISTAMAXX 2370 (commercially available from ExxonMobil Chemical Company). The process conditions can be found in Table 6 above, and the water absorbent core composition can be found in Table 8 below. The resulting absorbent cores were then subjected to a Super Absorbent Material (SAM) shake-off test using the composite shake-off test and a water absorption capacity (saturated capacity or "sat.cap.") test using the saturated capacity test, using the fluid uptake rate The trials were condu...
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