KR20030096655A - Ultra Absorbable Cellulose Sponge - Google Patents

Abstract

PURPOSE: Provided is a method for making an ultra-high absorption cellulose sponge, which has improved water absorption, reinforcing effect and anti-bacterial property than a conventional cellulose sponge. CONSTITUTION: The method for making an ultra-high absorption cellulose sponge is characterized by comprising the steps of: adding a water-absorptive polymer and a natural polymer to a mixture of a cellulose component, a reinforcing fiber and crystallized sodium sulfonate decahydrate. More particularly, 2-15 wt% of a water-absorptive polymer and 0.5-1.5 wt% of a natural polymer formed of an aqueous chitosan solution having a molecular weight of 1,500,000 and a pH of 6.5-7.5 are added, based on the content of the cellulose.

Description

Super Absorbable Cellulose Sponge

The manufacturing method of Cellulose Sponge is a known method of regenerating viscose into Cellulose by mixing viscose with reinforcing fiber, softening agent, antimicrobial agent, coloring agent and forget-me-not and molding it into a mold required to heat, coagulate and acid treatment. Sponge is hydrophilic, so it absorbs several times or tens of times of Sponge's own weight and has the flexibility of Sponge's characteristics.It is widely used for home and industrial use.In particular, Sponge of synthetic resin is not biodegradable when disposed. It is well known that pollution and incineration have a lot of treatment costs due to the generation of harmful gases. As a substitute for this, Cellulose Sponge is an essential and biodegradable natural fiber which is a characteristic of sponge. Application in the field is preferred.

In addition, general sponge has various properties to absorb water, so it is properly used in daily life. Typical sponges include paper, cotton cloth, starch, sponge, conception, pumice, synthetic resin and rubber blowing agent, silica gel, etc. Disadvantages of the weight and the external pressure are inadequate to release the inhaled water, which is inappropriate depending on the use and causes extreme environmental pollution with synthetic resin foaming agents, and destroys the ecosystem due to overfishing of sea level, conception, pumice, etc. Cellulose Sponge is aimed at developing various applications by improving pollution and ecosystem destruction, and providing high absorbency and high strength by improving weaknesses not solved by the prior art in alternative or Cellulose Sponge manufacturing.

The present invention relates to a method for preparing a super absorbent antimicrobial cellulose sponge using a mixture of a cellulose component, a reinforcing agent, a crystal netting, a softening agent, a super absorbent polymer and an antimicrobial agent, and a coloring agent. There was a limitation in the field of application because the absorption amount was limited with respect to the density of the cellulose sponge obtained by molding.

Cellulose Sponge is manufactured by dipping natural pulp in caustic soda solution, aging by alkali cellulose, aging, and then emulsifying with carbon disulfide. It is well known to have a coagulation and regeneration process by mixing crystal netting to produce a sponge of the density, and the elasticity, flexibility, density, etc. of Cellulose Sponge by the particle size of the crystal netting and the mixing amount of the crystal netting with viscose. The amount of water absorption is determined, but the maximum water absorption is limited to several times its own weight and volume of Cellulose Sponge. Its purpose is to overcome the limitations, to increase the amount of absorption and to suppress the growth of harmful molds, and to facilitate the mixing of reinforcing fibers in viscose. The conventional technique is to mix the following additives Results did not solve the problem and was prepared with quality Cellulose Sponge.

1. Measures to increase absorption

Water absorbing materials are known as Cellulose Sponge, Synthetic Sponge, Tissue Paper, Fabrics, Pumice, Sponge, Impregnation, etc. These do not absorb 20-30 times of their own weight, and the absorbed water is easily released under pressure Since the intended purpose cannot be achieved, the superabsorbent starch derivative (Cellulose derivative) is mixed with viscose to increase the absorption capacity limited to 20-30 times its own weight.

The superabsorbent polymer is composed of IONN mesh made of polymer electrolyte, movable IOION made of its state ions, and water, so that the concentration of movable ions is always higher inside the HYDROGEL than the appearance of HYDROGEL.

The factor that gives absorbency is the osmotic pressure and the affinity between water and the polymer electrolyte. The factor that inhibits the absorbency is rubber elasticity based on the mesh of the polymer electrolyte. The balance of these two factors determines the absorption capacity.

The water absorption rate Q (weight after absorption / weight before absorption) is expressed as follows.

Q = [(I / VuS) 2 + (1/2-Xi) / V1 / (Vc / Vθ)]

i / Vu = fixed charge concentration in the forget-me-not

S = electrolyte ion concentration of external solution

(1/2-X1) / V1 = affinity between forget-me-not and water

Vc / Vθ = crosslink density

In the equation, the first term means the penetration pressure and the second term indicates the affinity with water and together contributes to increase the absorption capacity. The crosslinking density of the denominator is based on rubber elasticity, and when the crosslinking density is slowed down, the absorption arrangement is increased. As a result, when the electrolyte strength of the external solution is high, for example, in the case of body fluids such as blood, the absorption power thereof is lower than that of pure water.

The absorbent material of the non-electrolyte polymer is not the molecular claim 1 in the formula, so that the absorbency is reduced compared to the electrolyte polymer. In this regard, by mixing 2-15% by weight of the above-mentioned material in the cellulose content of the viscose to increase the absorption capacity of the Cellulose Sponge, when blending more than 15% by weight causes a decrease in strength and flexibility and economical There is a problem.

2. Mixing method of antimicrobial and reinforcing fibers

As mentioned above, the use of Cellulose Sponge, such as scrubbers, bath towels, household cleaning, furniture and electronic products, and diapers for children, is highly absorbent during the distribution of Cellulose Sponge. In order to ensure safety, sufficient antibacterial properties can be secured by adding 20-25% by weight of the cellulose content of viscose as an appropriate preservative to solve the above-mentioned problems, and the specific properties of CHITOSAN By combining Cellulose Sponge with more than 80% and less than 90% of Viscose directly, antimicrobial effect can be obtained and production cost can be expected.

In the prior art, it is known that the inconvenience of immersing separate preservatives and harmful substances to human body after manufacturing Cellulose Sponge has not been solved, and that CHITOSAN is antimicrobial. .000, PH 6.5-7.5 Deacetylation of the specific CHITOSAN of 80% or more but less than 90% was first solved by the present invention and also the same as Viscose PH when mixing CHITOSAN of PH 6.5-7.5 preferably PH 7.5 in viscose Because it is effective, there may be side effects such as cost problem and delayed decoagulation of viscose.

In addition, non-ionic surfactants and anionic surfactants are also possible when mixing reinforcing fibers in viscose. Preferably, the CHITOSAN is highly hydrophilic and similar to Cellulose. ) Is mixed with the aqueous solution of CHITOSAN to obtain a uniform mixing result of cotton and reinforcing agent and Cellulose, characterized in that the reinforcing effect is increased due to the characteristics of the CHITOSAN.

(1) Alkaline cellulose is produced by dipping natural pulp, which is a raw material, in a solution of caustic soda above a certain concentration.Alkaline cellulose reacts with carbon disulfide to produce cellulose chilate, and the viscosity changes when dissolved in dilute alkali. Become a viscose.

(2) In order to reinforce viscose elasticity and tensile strength, cotton and hemp are mixed together, and absorbent polymer and CHITOSAN are mixed to enhance absorbency and antibacterial properties.

(3) Mixed with a certain amount of crystalline forget-me-not to form pores of the sponge.

(4) The mixture was immersed in an acid coagulation bath and heated and coagulated at around 100 degrees Celsius.

(5) After washing with clear water, bleach with sodium hypochlorite water and with clear water.

(6) It is packaged into various standards using horizontal, vertical and cutting machines.

** Existing method: Preservative treatment in process No. (88-11417) (6)

Notice (83-1414) Add Water-Soluble Group in Process (2)

1) The absorbent polymer water is mixed to increase the absorption of cellulose sponge.

2) Improved antibacterial property by directly mixing natural CHITOSAN aqueous solution with viscose.

3) Improved reinforcing effect by smooth mixing of viscose and reinforcing fiber (cotton).

1) As mentioned above, the maximum amount of absorbed Cellulose Sponge is higher than any type of substance, and it is recognized that it is insufficient depending on the facts and uses. As the thickness of the adsorbent is different and the thickness is increased, it is inconvenient for the user to increase the absorbency of the Cellulose Sponge by adding a super absorbent material so as to absorb as much feces as possible as thin products as possible. Compensate for the shortcomings,

2) By using CHITOSAN which is harmless to human body and also used for food, it improves the antimicrobial, anti-odor, biodegradability, mixing of reinforcing fiber, and improves hygiene safety of consumers, and completely solves the defect of Cellulose Sponge that previous technology has not solved. Resolved.

EXAMPLE

1. After immersing, squeezing, dehydrating and pulverizing pulp in 18% aqueous solution of caustic soda, the crystalline forget-me-not acts as a thickening agent for normal cotton and Cellulose Sponge as a reinforcing agent in viscose obtained after emulsification and aging. Viscose obtained by mixing 50 times the amount of water absorbent polymer and CHITOSAN by mixing 3% of Cellulose content and 5% of CHITOSAN was tested by the known method in comparison with Comparative Example 1 for the absorption of Cellulose Sponge.

[Comparative Example]

1. Absorption of viscose obtained in the same manner as in Example 1 except for the absorbent polymer and natural polymer to obtain the Cellulose Sponge according to the known method to obtain the same product as the sponge obtained in Example 1 to test the absorption amount.

[Result] Absorption Measurement

Specification of Example 1 (140 × 95 × 15m / m)

Weight before absorption: 6.3g → W1

Weight after absorption: 246.6g → W2

Absorption amount (W2-W1): 258.3 g

Specifications of Comparative Example 1 (140 × 95 × 15m / m)

Weight before absorption: 6.3g → W1

Weight after absorption: 127.4g → W2

Absorption amount (W2-W1): 121g

Claims (2)

A method for producing super absorbent Cellulose Sponge, characterized in that the absorbent polymer is used as a mixture of the cellulose component, the reinforcing fiber and the crystalline forget-me-not. In the mixture, 2-15% of the absorbent polymer was added to the cellulose content, and 0.5-1.5% was added to the cellulose content of CHITOSAN, a natural polymer of the aqueous solution of CHITOSAN having a molecular weight of 1.500.000 and PH 6.5-7.5, which is a cellulose sponge and a mixture of cellulose and reinforcing agent. Cellulose Sponge manufacturing method.