JPH062145B2 - Method for producing deodorant absorbent for sanitary treatment products - Google Patents

Description

[Detailed Description of the Invention] {Industrial field} The present invention relates to a method for producing an absorbent from sugar beet pulp having a deodorant effect and a high water absorption used for sanitary products such as disposable diapers and sanitary napkins. Is.

{Prior Art} Conventionally, sanitary products such as disposable diapers and sanitary napkins are composed of absorbent materials such as absorbent cotton, water absorbent paper, wood pulp, non-woven fabric and polymeric absorbents to absorb human secretions and excretions. There is. Most of these absorbents are water but have a peculiar odor.

However, since each of the absorbents does not have a deodorizing effect, a separate deodorizing agent must be mixed in order to remove the odor, and the ease of handling and the conspicuousness at the time of use should be eliminated. However, it is not preferable to mix foreign substances in addition to the absorbent.

{Problems to be Solved by the Invention} The inventors of the present invention previously described an absorption deodorant for hygiene products having a deodorizing effect by heating sugar beet cozette from which sugar was extracted from the sugar beet sugar production step in Japanese Patent Publication No. 63-19184. It discloses an absorbent deodorant for sanitary products, such as sanitary products, which is treated with water, dehydrated and dried, and then crushed to form sugar beet fiber powder. If it becomes long, the plant tissue will be deteriorated and the deodorizing and water absorbing performance will be adversely affected.

{Means for Solving the Problems} As a result of intensive studies by the present inventors to solve the above problems,
By immersing sugar beet pulp in a liquid containing sodium chlorite and treating it for 0.5 to 2 hours at a temperature of 70 to 80 ° C., which is the same as the sugar extraction temperature of sugar beet and does not cause deterioration of sugar beet pulp fiber, It was discovered that a sugar beet pulp having a high fiber content content can be obtained, and the sugar beet fiber powder obtained by crushing and pulverizing the sugar beet pulp is a powder having extremely good water absorption performance.

{Action} The sugar beet pulp used in the present invention means that the sugar beet raw material is cut into cosettes in the production of sugar beet sugar.
After leaching sugar and other components that are water-soluble components by immersing in warm water, it is a residue that has been pressed and dehydrated, and this pressed and dehydrated sugar beet pulp is usually used in a raw state or dried and used as animal feed. It is what has been.

The present inventors extracted sugar in the sugar beet sugar-making step and immersed the sugar beet pulp (water content 74.5%) that had been pressed and dehydrated in a solution containing 0.5% sodium chlorite to give 75 The sugar beet pulp was heat-treated at 1 ° C. for 1 hour, and after the treatment, the sugar beet pulp was washed with tap water until the attached chlorine was eliminated. Thereafter, the washed sugar beet pulp was dried by a shelf dryer, and the obtained dried sugar beet pulp (water content 5.4%) was crushed by a compact mill to obtain sugar beet fiber powder. The composition components of this sugar beet fiber powder are shown in Table 1. As a control example, the composition value of the heat-treated dried sugar beet pulp powder which has not been treated with sodium chlorite and has been subjected to hot water treatment at 95 ° C. of JP-B-63-19184 is shown.

However, the whiteness is the L Hunter value measured by a colorimetric color difference meter manufactured by Tokyo Denko.

As shown in Table 1 above, the hemicellulose and cellulose content ratios of the product of the present invention show a marked improvement, as compared with the hot water-treated dried beet valp-containing cellulose and hemicellulose ratios. Next, Table 2 shows the results of the investigation on water absorption.

In the water absorption performance shown in Table 2, the sugar beet fiber powder (16-32 mesh) of the product of the present invention is 2.3 in dry sugar beet pulp.
This shows that the performance is doubled, and the action of the sodium chlorite treatment is extremely remarkable. Further, as the absorption performance, Table 3 shows the results of investigations on demineralized water, artificial water and blood. As a control example, a polymer absorbent and activated carbon will be exemplified in addition to the hot-water-treated dried beet pulp powder.

Note (1) Test method: Excess demineralized water, artificial urine (adjusted by mixing 0.2% urea, kc 10.4%, water 98.2%) and bovine blood to each sample and mix well, After 20 minutes, natural filtration was performed, and the water absorption capacity was calculated by the following formula.

(2) Double oxalate was added to bovine blood at 0.2%.

(3) Dried sugar beet pulp, the product of the present invention used was 36-80 mesh.

(4) Polymer absorbent (1) Nippon Catalysis Chemical Co., Ltd. trade name AQUALIC (2) Showa Denko brand name Pre-Apple As shown in Table 3 above, even in artificial urine and blood, the present invention product is hot water. 1.8-2.4 compared to treated dried beet pulp
The water absorption performance was doubled, and compared with the polymer absorbents that are commonly used as high-performance absorbents at present, the artificial urine absorbs 56-65% and blood absorbs 72-82%. It shows the performance and is extremely excellent as a whole from the viewpoint that the polymer absorbent does not have the deodorizing performance as described later.

Therefore, next, regarding the deodorizing performance, as a contrast with the product of the present invention,
Same as Table 3, hot water treated dried beet pulp polymer absorbent,
For activated carbon, the amount of these water absorbing agents added is 0.5%.
The test was performed by changing the amount to 0%, 2.0%, and 10%, and the deodorizing ability was evaluated by a panel of 5 people. The result is the fourth
Shown in the table.

Note Test method: Cattle manure is filtered with a double gauze, and the filtrate is diluted twice with water. Add 0.5% of each water absorbent to the diluted solution
%, 1.0%, 2.0%, 10.0% (weight ratio), and the mixture was stirred, and the deodorizing effect was judged by the sense of smell with a panel of 5 people.

Symbol −: No effect ±: Some effect +: Effective As shown in Table 4 above, dried sugar beet pulp powder by hot water treatment, the product of the present invention, and activated carbon exert a deodorizing effect. However, the polymeric absorbent does not show deodorizing performance regardless of the amount of addition due to its material and mechanism.

Next, Table 5 shows the results of the investigation on the influence of the particle size of the present invention on the absorption performance.

Test method: Using the cow dung urine diluted solution shown in Table 4, the water absorption ability and the dehydration ability were investigated by the methods shown in Tables 3 and 4.

As shown in Table 5, although there is no difference in deodorizing ability depending on the particle size, the water absorption performance tends to slightly decrease with fine particles. Therefore, the commonly used particle size should be 250 mesh or less, Should be avoided.

The present invention is to treat sugar beet pulp by immersion in a sodium chlorite-containing liquid, but the sodium chlorite content of the treatment liquid is usually in the range of 0.01 to 0.1%, If the amount is too small, the content ratio of hemicellulose and cellulose in the sugar beet fiber powder will be low, the structure will not be porous, and the water absorption performance will be deteriorated. On the other hand, if the content is too high, the pulp itself will be gelatinized due to chemical damage and the texture will be deteriorated, which will adversely affect the water absorption performance.

The sugar beet pulp is treated with a sodium chlorite-containing liquid to improve the content of hemicellulose and cellulose, and it is considered that the reason why the water absorption performance is improved is that the tissue is porous due to a change in components and a physical change. Even when treated with other bleaching agents such as a solution containing sodium hypochlorite, a deterioration phenomenon occurs in the pulp body and the water absorption performance unlike the product of the present invention does not occur.

The sugar beet fiber powder obtained from the sugar beet pulp of the present invention can be used alone as a deodorant absorbent for sanitary treatment products, but can also be used in a state of being mixed or processed with a polymer absorbent or the like.

An example will be described below.

{Example} Example 1 Sugar beet pressed pulp (water content 74.5%) obtained by applying a press dehydrator after sugar extraction in the sugar beet sugar production step
Treatment liquid containing 200 kg of sodium chlorite 0.5% 7
It was immersed in 50 kg and heat-treated at 75 ° C. for 1 hour.
After that, the pulp was thoroughly washed with tap water, and after confirming that there was no residual chlorine, it was subjected to a press dehydrator to obtain 140 kg of dehydrated product (water content 76.4%). Then, it was dried with a shelf type ventilation dryer to obtain 35 kg of a dried product (water content 5.4%). The dried product is crushed by a compact mill (hammer mill system, screen opening 0.8 mm), then 80 mesh, 32
It was sieved with a mesh to obtain 29 kg of 32 to 80 mesh powder (water content 5.3%).

The powder thus obtained was used as a deodorant absorbent for sanitary products such as a disposable diaper and a sanitary napkin of the present invention.

Example 2 A non-woven fabric was used on one side and a water-impermeable thin film of poly sheet was used on the other side to form a water absorbing layer made of paper cotton laminated inside,
8 g of the sugar beet fiber powder of the present invention obtained in Example 1 was enclosed in a portion of the water absorbing layer near the pyrisheet to prepare a total 32 g of disposable diaper.

An infant was allowed to wear this paper diaper for 6 hours and then removed. It weighed 122 g and absorbed approximately 90 g of urine. No external leakage or wetting was observed, and there was no odor, and it was extremely easy to replace the diaper.

Example 3 As in Example 2, one side was made of non-woven fabric and the other side was made of a water impermeable thin film of a poly sheet, and a water absorbing layer made of paper cotton laminated inside was formed, and the water absorbing layer was formed in a portion close to the poly sheet. Polymer absorbent (manufactured by Sanyo Kasei, trade name Sunwet) 3
g and 8 g of the sugar beet fiber powder of the present invention obtained in Example 1 were mixed and encapsulated to prepare a total of 30 g of a disposable diaper.

An infant was allowed to wear this paper diaper for 6 hours and then removed. It weighed 149 g and absorbed approximately 119 g of urine, but since there was no leakage or wetting to the outside and no odor, it was extremely easy to replace the diaper.

{Effect} Since the deodorant absorbent for sanitary products obtained by the present invention uses natural plant fiber, it is harmless to the human body and has both deodorant and absorbent properties and is extremely effectively secreted by the human body. It can absorb substances, human excrement, etc., and is very useful because it can be used in a paper diaper, a sanitary napkin, a disposable rag, etc., very easily and safely.

Claims (1)

[Claims] 1. Sugar beet pulp and sodium chlorite of 0.01 to
Immerse in a solution containing 0.1%, 0.5 at 70-80 ℃
A method for producing a deodorant absorbent for sanitary products, which comprises heat-treatment for 2 hours, washing with water, drying and crushing