JP4426255B2 - Sheet for impregnation with disinfectant - Google Patents

Description

  The present invention relates to a disinfectant-impregnated liquid-impregnated sheet used for disinfecting various types of medical devices such as a stethoscope and a thermometer in order to disinfect a patient's skin and prevent hospital infection.

  For example, it is known in Patent Document 1 that the upper and lower surfaces of a core layer made of pulp are covered with a surface layer such as a nonwoven fabric or rayon paper in cosmetic cotton (a cosmetic puff). In this case, the skin layer is occluded satisfactorily by the core material layer having a large thickness, and the skin contact quality is ensured by the surface layer having a small thickness. And the surface layer allows internal lotion to permeate, preventing scattering of the pulp powder of the core material layer.

Japanese Utility Model Publication No. 58-39609 (request for utility model registration, Fig. 4)

  The above-mentioned cosmetic cotton has a background in that it is suitable for disposable as an alternative to traditional cotton wool because it is expensive. In fact, natural raw cotton requires a lot of labor for processing and is costly, and foreign matters are mixed in and there are many problems in quality.

  However, the conventional cosmetic cotton heat seals the outer peripheral edges of the upper and lower surface layers together with the core material layer, and does not have a laminated structure in which the core material layer and the surface layer are integrally joined together. Therefore, the manufacturing cost is high as much as the heat sealing process is required, and the mass productivity is poor. For example, when a wide sheet impregnated with a sterilizing / disinfecting solution is used, the core material layer and the surface layer are separated from the outside of the heat seal such as the central portion, so that the disinfecting / disinfecting solution does not ooze out evenly from the entire surface of the sheet. There are disadvantages.

  Accordingly, an object of the present invention is to enable mass production of a disposable nonwoven disinfectant-impregnated liquid impregnated sheet at low cost. An object of the present invention is to obtain a sheet impregnated with a sterilizing / disinfecting solution that allows the sterilizing / disinfecting solution to permeate well from the entire surface of the sheet while being impregnated with the minimum necessary amount of the sterilizing / disinfecting solution.

As shown in FIG. 1, the sterilizing liquid impregnating sheet according to the present invention has a three-layer structure in which the surface layers 2 and 2 having a small thickness are laminated on both upper and lower surfaces of a core material layer 1 having a large thickness. disinfectant in the core layer 1 and the surface layer 2, 2 is a disinfectant-impregnated sheet of non-woven fabric to be impregnated. Core layer 1 is made of a fibrous web 1a containing a chemical pulp 2 0-80 wt% cellulose content derived from wood, synthetic resin textiles 8 0-20 weight percent, and a rayon 10% by weight. The synthetic resin fiber of the core material layer 1 is a PET fiber having a single fiber fineness of 1 to 5 dtex. Each surface layer 2, rayon, cotton, the fiber length 3-51 upper and lower surfaces of at least one of cotton linter, Ru fiber web 2a Tona the thickness consisting of chemical pulp is a cellulose content derived from the small timber. The fiber web 2a constituting the surface layer 2 contains 50% by weight or more of cellulose fibers having a fiber length of 3 to 51 mm made of at least one of rayon, cotton, and cotton linter. Surface layers 2 and 2 are integrally laminated on the upper and lower surfaces of the core material layer 1 by the confounding method. The term “sterilizing / disinfecting solution” as used herein includes a simple disinfecting solution but also includes a disinfecting solution.

  The core material layer 1 exists exclusively for impregnating and occluding the sterilizing liquid. Therefore, it is desirable that the core material layer 1 is set to 70 to 95% by weight of the whole, and accordingly both surface layers 2 and 2 are set to 30 to 5% by weight of the whole.

  The chemical pulp of the core material layer 1 is obtained by treating a ground pulp obtained by pulverizing a raw material wood with a chemical agent to extract a cellulose content in the wood, and is excellent in liquid absorption among fibers and can be obtained at the lowest cost. This is the reason for selection.

  The reason why the amount of the chemical pulp in the core material layer 1 is set to 20% by weight or more is that if the amount is less than this, the amount of occlusion of the sterilizing and disinfecting liquid by the core material layer 1 cannot be secured. The reason why the amount is not more than wt% is that if the amount exceeds this, the amount of occlusion of the sterilizing / disinfecting liquid in the core material layer 1 becomes too much and becomes sticky, and the amount of unnecessary sterilizing / disinfecting liquid increases. Along with this, the synthetic resin fibers of the core material layer 1 are blended in an amount of 80 to 20% by weight in relation to chemical pulp.

  That is, the synthetic resin fiber of the core material layer 1 imparts bulkiness to the core material layer 1 exclusively while having liquid retention. As a synthetic resin fiber for that purpose, it is preferable to use a PET fiber or a PET / PE core-sheath fiber having a single fiber fineness of 1 to 5 dtex. The PET / PE core-sheath fiber is a fiber in which the core component is PET and the sheath component is PE. These PET fibers have waist strength (rigidity) and well maintain the core material layer 1 to be elastic and bulky. PP fiber, PE fiber, etc. can also be used for this synthetic resin fiber.

  Each surface layer 2 exists in order to improve the touch to the skin and the texture while preventing the dropping of the chemical pulp constituting the core material layer 1 and the jumping out of the synthetic resin fiber. For this purpose, each surface layer 2 is composed of a fiber web 2a containing 50% by weight or more of cellulose fibers having a fiber length of 3 to 51 mm. Examples of such cellulose fibers include rayon, cotton, and cotton linter. By selecting at least one of them, each surface layer 2 is also given liquid absorbency.

  The fiber web 1a of the core material layer 1 and the fiber webs 2a and 2a of the upper and lower surface layers 2 and 2 can be integrally laminated by entanglement treatment by a known hydroentanglement method or dry airlay entanglement method. At that time, according to the hydroentanglement method, the interentanglement between the fibers can be performed better, and the mass productivity is also suitable.

  When the hydroentanglement method is used, the fiber web 1a of the core material layer 1 and the fiber webs 2a and 2a of the surface layers 2 and 2 are overlapped as shown in FIG. After completing the one steam injection process, a nonwoven fabric sheet can be produced through a confounding process of injecting a pressurized water stream onto the three-layer web 3 and finally through a second steam injection process of injecting steam onto the three-layer web 3. In the first steam injection step, the oil component adhering to the fibers of the fiber webs 1a, 2a, and 2a is removed, sterilized, and pre-entangled. In the second steam injection step, the final oil removal, sterilization and entanglement are performed. In the present invention, the steam injection process may be performed only once after the confounding process.

The core material layer 1 occupies 70 to 95% by weight of the whole sheet, and accordingly, both surface layers 2 and 2 can be set to 30 to 5% by weight of the whole sheet. Here, if the core material layer 1 is less than 70% by weight of the entire sheet, the bulkiness is insufficient, and the total production cost is increased by the amount of chemical pulp used. On the other hand, when the core material layer 1 exceeds 95% by weight of the entire sheet, the surface layer 2 becomes too thin and the function of the surface layer 2 is not fully exhibited. The basis weight of the sterilizing / disinfecting liquid-impregnated sheet can be set to 40 to 300 g / m ² .

  According to the sterilizing / disinfecting liquid impregnated sheet of the present invention, since the core material layer 1 constituting the main body is mainly composed of cheap chemical pulp, it can be manufactured at a low cost as a whole even if it is set to be bulky. The synthetic resin fibers constituting the core material layer 1 maintain the core material layer 1 in a bulky state, while the core material layer 1 is not impregnated with an extra sterilizing / disinfecting solution, and thus can be manufactured at low cost.

  Since both the upper and lower surfaces of the core material layer 1 are covered with the surface layers 2 and 2 containing the cellulosic fiber, it has excellent skin contact, texture and liquid retention, and in particular, prevents the previous chemical pulp from falling off, Is granted.

  Since the fiber web 1a of the core material layer 1 and the fiber web 2a of each surface layer 2 are integrally joined by the entanglement method, the sterilization solution is impregnated without excess or deficiency without sticking the entire surface. Can do.

  When the fiber web 1a constituting the core material layer 1 and the fiber web 2a constituting the upper and lower surface layers 2 are entangled by the hydroentanglement method, the three-layer fiber web is subjected to steam injection treatment. In addition to sterilization treatment and entanglement assist treatment, oil attached to the fibers of the fiber webs 1a and 2a can be removed efficiently, so the Ministry of Health and Welfare Notification No. 133, elution based on medical nonwoven fabric gauze standards Material standard (1) A disinfectant-impregnated liquid-impregnated sheet compatible with the foaming test and the permanganate consumption test is obtained.

(Example 1) Fig. 1 is a cross-sectional view showing Example 1 of a sterilizing liquid impregnated sheet according to the present invention. It consists of a nonwoven fabric (weight per unit area 120 g / m ² ) in which the layers 2 and 2 are joined by a hydroentanglement method to form a three-layer structure.

The fiber web 1a of the core material layer 1 includes the following fibers, and the weight per 1 m ² was 100 g / m ² . PP / PE core-sheath fiber here is a fiber in which the core component is PP and the sheath component is PE.
Core material layer 1
Chemical pulp 28.75% by weight
10% by weight of rayon
PET fiber 60% by weight
PP / PE core-sheath fiber 1.25% by weight

The web 2a of each of the upper and lower surface layers 2 contains the following fibers, and the total weight of both surface layers ² per 1 m ² was 25 g / m ² .
70% by weight of rayon
Cotton 15% by weight
Chemical pulp 15% by weight

  The fiber web 1a of the core layer 1 and the fiber webs 2a and 2a of the surface layers 2 and 2 are overlapped as shown in FIG. 2, and the three-layer web 3 is subjected to a first steam treatment process and an entanglement process. The nonwoven fabric sheet was obtained through the 2nd steam treatment process and the drying process in order. In the first steam treatment process, steam of a predetermined pressure is injected onto one of the three-layer webs 3 to remove the oil content of the fibers (rayon, PE fibers) in the fiber webs 1a and 2a that are particularly rich in oil. Sterilize and steam entanglement. In the entanglement process, the pressurized water is sprayed onto the three-layer web 3 from one of them to entangle the fibers of the fiber webs 1a and 2a. In the second steam treatment step, the fiber is removed, sterilized, and steam entangled.

  The nonwoven fabric sheet thus obtained was impregnated with a skin sterilizing / disinfecting liquid to obtain a sterilizing / disinfecting liquid-impregnated sheet. According to this, an active ingredient in the sterilizing and disinfecting liquid impregnated in the core material layer 1, for example, benzalkonium chloride, benzethonium chloride, chlorhexidine gluconate, popidone iodine, by blending synthetic resin fibers in the core material layer 1 As a result, the amount remaining after being adsorbed in the core material layer 1 is reduced, and even if the core material layer 1 is not impregnated with an extra sterilization solution, the sterilization can be effectively performed.

Cross section of the main part Conceptual diagram explaining the manufacturing process of the nonwoven fabric sheet

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Core material layer 1a Core material layer fiber web 2 Surface layer 2a Surface layer fiber web 3 Three layer web

Claims (1)

It has a three-layer structure in which a thin surface layer (2, 2) is laminated on both upper and lower surfaces of a thick core material layer (1). These core material layer (1) and surface layer (2-2) In the sheet for impregnation with a disinfectant made of nonwoven fabric impregnated with a disinfectant,
Core layer (1) is, fibers comprises chemically pulp 2 0-80 wt% cellulose content derived from wood, synthetic resin textiles 8 0-20 weight percent, and a rayon 10% by weight web (1a) Consists of
The synthetic resin fiber of the core material layer (1) is a PET fiber having a single fiber fineness of 1 to 5 dtex,
Each surface layer (2) is composed of a fiber web (2a) composed of cellulose fibers having a fiber length of 3 to 51 mm made of at least one of rayon, cotton, and cotton linter and chemical pulp that is a cellulose component derived from wood. The
The fiber web (2a) constituting the surface layer (2) contains 50% by weight or more of cellulose fibers having a fiber length of 3 to 51 mm made of at least one of rayon, cotton, and cotton linter.
Surface layers (2 and 2) are laminated integrally on the upper and lower surfaces of the core material layer (1) by the confounding method,
The core layer (1) is set to 70 to 95% by weight of the whole, and both surface layers (2 and 2) are set to 30 to 5% by weight of the whole,
A three-layer web (3) in which the fiber webs (2a, 2a) of the surface layer (2, 2) are superimposed on the upper and lower surfaces of the fiber web (1a) of the core material layer (1), and a water stream for injecting a pressurized water stream thereto. Entangled with the confounding method,
3-layer web (3) is, in succession to the injection of pressurized water flow, disinfectant-impregnated sheet characterized that you have received the injection process steam.

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