Non-ionic plasticizer additives for wood pulps and absorbent cores and its producing method
A technology of wood pulp and plasticizer, which can be used in non-fibrous pulp addition, absorbent pads, textiles and papermaking, etc., and can solve the problems of high cost and reduced absorption performance
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Embodiment 1
[0101] Triacetin (from Eastmann Chemical Company) was added to several pulp sheets of Pulp 1 by spraying directly on the pulp sheets (1% dry stock). The pulp sheet thus treated was referred to as Pulp 2. Treated pulp 2 and untreated pulp 1 were mixed in different ratios (0, 33%, 66% and 100%) to make an air deposition absorbent core. The core contained 55% SAP. Gurley Precision Electronic Bending Resistance Tester (Gurley Precision electronic bending resistance testing machine) test these cores to obtain the stiffness value. The stiffness value indicates the softness of the material, and the lower the stiffness value, the softer the material.
[0102] It was found that stiffness decreased with increasing amount of triacetin treated pulp. The stiffness of the controlled air deposition absorbent core was 980 mg and the stiffness of the absorbent core with 100% triacetin treated pulp was 780 mg. Table 1 summarizes this trend.
[0103] The softness value is derived from the sti...
Embodiment 2
[0120] The second set of experiments involved determining the effect of density on the softness of the airborne absorbent core. Each core contains 55% SAP. Airborne absorbent cores were made from four different grades of pulp and tested as follows.
[0121] Typically, laboratory-made absorbent cores have a density of about 0.3 g / cc. In order to obtain a higher density, the paving and flattening machine is used to reduce the thickness and thus increase the density. The stiffness of the pressed samples was tested. The pavement press was also used to compact radially wicking samples from the absorbent core to about 0.39 g / cc to simulate a production run density.
[0122] As shown in Table 3, density resulted in an increase in stiffness for all samples studied. Compared to the Pulp 1 sample, overall, the cores containing the triacetin-treated pulp had significantly lower stiffness. It was also found that this decrease in stiffness is independent of density.
[0123] ...
Embodiment 3
[0141] The effect of varying the amount of triacetin applied to the pulp was tested by adding different amounts of triacetin to pulp 1 pulp sheet. The amounts of triacetin added to the oven-dried pulp were 0.1%, 1.5%, 2.0%, 3.0%, 5% and 10%. These treated pulp sheets were then used to make air deposition absorbent cores. Each core contained 55% SAP. These sheets were then tested for stiffness according to the procedure described in Example 1.
[0142] Increased triacetin loading generally decreased stiffness. This trend can be seen in Table 4, which shows an almost 50% drop in stiffness.
[0143] Table 4
[0144] % triacetin
[0145] 1 = basis weight 520gsm, density 0.30g / cc
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