WO2019128372A1

WO2019128372A1 - Gauze pad

Info

Publication number: WO2019128372A1
Application number: PCT/CN2018/109491
Authority: WO
Inventors: 肖望东; 黎继春; 林峰; 徐令军; 徐小连
Original assignee: 深圳职业技术学院; 深圳市源邦科技有限公司
Priority date: 2017-12-29
Filing date: 2018-10-09
Publication date: 2019-07-04
Also published as: CN107997880A

Abstract

Disclosed is a gauze pad (100), the embodiments thereof relating to the field of medical technology. The gauze pad (100) comprises: a moisture sustaining layer (30), the moisture sustaining layer (30) being provided in the gauze pad (100), and at least one kind of highly absorbent fibre being added to the moisture sustaining layer (30). In the gauze pad (100), a kind of highly absorbent fibre is added to the moisture sustaining layer (30), and when in contact with a body fluid, the body fluid combines with hydrophilic groups in the highly absorbent fibre, and the body fluid will not leak out of a highly absorbent resin even under pressure at normal temperature, thereby achieving high moisture absorption and water retention to prevent body fluid from leaking out of the gauze, such that the gauze pad (100) remains relatively clean during use.

Description

Gauze piece

Technical field

Embodiments of the present application relate to the field of medical technology, and in particular, to a gauze sheet.

Background technique

In the course of surgery, medical gauze is generally used for aspiration, hemostasis and dressing. In order not to leave the gauze used in the patient, the surgical gauze used has a developing line which is not penetrated by X-rays. Clearly displayed on the X-ray display or X-ray film.

In the process of implementing the present application, the inventor found that the traditional medical gauze structure is very simple, the liquid absorption is not strong, and the blood water of the wound or the affected part is easily overflowed in the gauze, so that the gauze is easy to breed bacteria, causing wound infection and difficult to heal.

Summary of the invention

The embodiment of the present application aims to provide a gauze sheet which can solve the technical problem that the existing gauze sheet absorbs low body fluid properties and is easy to reverse osmosis. In order to solve the above technical problem, a technical solution adopted by the embodiment of the present application is to provide a gauze sheet, comprising: a water lock layer, the water lock layer is disposed in the gauze sheet, and the water lock layer is added at least A highly absorbent fiber.

Optionally, the superabsorbent fiber is a carboxylic acid water absorbing fiber, an acrylic water absorbing fiber, a polyacrylonitrile water absorbing fiber, a polyvinyl alcohol water absorbing fiber or a modified polyvinyl alcohol water absorbing fiber.

Optionally, the water lock layer is made of the superabsorbent fiber and the PE/PET composite fiber.

Optionally, the superabsorbent fiber is: 30-75 parts by weight; and the PE/PET composite fiber is 25-70 parts.

Alternatively, the superabsorbent fiber is a carboxylic acid type water absorbing fiber.

Optionally, the gauze sheet further includes: a first water absorbing layer and a second water absorbing layer, the water blocking layer being located between the first water absorbing layer and the second water absorbing layer; the first water absorbing layer and The second water absorbing layer is for diffusing liquid to the water blocking layer.

Optionally, the first water absorbing layer and the second water absorbing layer are made of wood pulp fibers.

Optionally, the gauze sheet further comprises: an X-ray detectable developing line, the developing line being disposed between the first water absorbing layer and the water blocking layer.

Optionally, the outer surface of the gauze sheet is a first non-woven layer and a second non-woven layer, and the first water-absorbing layer is disposed between the first non-woven layer and the water-blocking layer The second water absorbing layer is disposed between the second nonwoven fabric layer and the water blocking layer.

Optionally, the first nonwoven layer and the second nonwoven layer are made of PE/PP composite fibers.

The gauze sheet provided by the present application adds a superabsorbent fiber to the water-blocking layer, and when the body fluid is contacted, the body fluid is combined with the hydrophilic group in the superabsorbent fiber, and even if pressure is applied at normal temperature, the body fluid is not It will overflow from the super absorbent fiber to achieve high water absorption and water retention, prevent body fluid from overflowing from the gauze, and keep the gauze sheet relatively clean and clean during use.

DRAWINGS

FIG. 1 is a schematic structural view of a gauze sheet provided by an embodiment of the present application.

Detailed ways

In order to make the objects, technical solutions, and advantages of the present application more comprehensible, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the application and are not intended to be limiting.

The embodiment of the present application first provides a gauze sheet 100 comprising: a first nonwoven fabric layer 10, a first water absorbing layer 20, a water blocking layer 30, a second water absorbing layer 40, and a second nonwoven fabric layer 50.

The first nonwoven fabric layer 10, the first water absorbing layer 20, the water-blocking layer 30, the second water absorbing layer 40, and the second nonwoven fabric layer 50 are sequentially connected together as shown in FIG. Specifically, the first non-woven fabric layer 10, the first water absorbing layer 20, the water-locking layer 30, the second water absorbing layer 40, and the second non-woven fabric layer 50 may be connected together by thermocompression bonding. It may also be initially bonded with adhesives between the layers and then joined together by hot pressing.

In some embodiments, a developing line with X-ray detection may also be embedded between the water blocking layer 30 and the first water absorbing layer 20 or the water blocking layer 30 and the second water absorbing layer 40 (the developing line 60 shown in FIG. 1) In order to facilitate the gauze to be traced by X-rays, it can be taken out in time during surgery to avoid hidden troubles in the patient.

The specific composition of each layer of the gauze sheet 100 will be described in detail below. Specifically, the first non-woven fabric layer 10 and the second non-woven fabric layer 50 can be prepared by using PE and PP two-component sheath-core structural composite fibers (also referred to as ES fibers), wherein the cortical tissue material is PE. The core layer material is PP.

PE as a cortical structure has a low melting point and good flexibility, and PP as a core layer has a high melting point and high strength. After the heat treatment of the composite fiber, a part of the PE is melted to effectively bond the fibers at the intersection, and the core layer PP maintains the original strength and the like, so that the obtained composite fiber exhibits excellent softness, and has Good elasticity and high strength. Wherein, the sheath-core composite fiber has the characteristics of low heat shrinkage rate, and the shrinkage rate is only 5% in the free state thereof. Further, the first nonwoven fabric layer 10 and the second nonwoven fabric layer 50 partially prevent body fluids. The effect of backflow.

The first nonwoven fabric layer 10 and the second nonwoven fabric layer 50 may be prepared by one or more of hydroentangled, heat-sealed, wet-processed, spunbonded, melt-blown, needled, stitch-bonded, and the like.

Preferably, the first nonwoven fabric layer 10 and the second nonwoven fabric layer 50 may be obtained by hydroentanglement or melt blown. In the present embodiment, the first nonwoven fabric layer 10 and the second nonwoven fabric are obtained. The layer 50 has a basis weight of 8-15 g/m ² ; preferably, a spunlace nonwoven fabric having a gram weight of 12 g/m ² can be selected, and the gram weight gauze is more suitable for dressing wounds of patients in medical gauze, Healing use.

Preferably, the surfaces of the first nonwoven fabric layer 10 and the second nonwoven fabric layer 50 are slightly embossed, and the embossing can prevent the first nonwoven fabric layer 10 or the second nonwoven fabric layer 50 from being too smooth to increase the The water absorption capacity of the nonwoven fabric layer. The nonwoven fabric layer obtained above has the characteristics of hydrophilicity, gas permeability, and the like, and the liquid and gas can be quickly transmitted, and has a strong water absorption capacity.

The first water absorbing layer 20 and the second water absorbing layer 40 are instantaneous water absorbing layers for instantaneously sucking liquid around the gauze to diffuse into the water lock layer. In this embodiment, the first water absorbing layer 20 and the second water absorbing layer 40 may be made of wood pulp composite fibers. The wood pulp composite fiber has a good capillary structure because it is made of wood pulp, and the structure can help the liquid to diffuse to conduct the liquid to absorb the liquid from the first nonwoven fabric layer 10 and the second nonwoven fabric layer 50. After the first water absorbing layer 20 and the second water absorbing layer 40 are diffused to the respective corners, when the liquid flows to the water lock layer, the corners of the water lock layer can be covered to improve the use efficiency of the water lock layer.

In the present embodiment, the first water absorbing layer 20 and the second water absorbing layer 40 may be made of wood pulp composite fiber, and have a basis weight of 20-30 g/m ² , preferably, a gram weight of 25 g/m ² . The wood pulp composite fiber water absorbing layer and the nonwoven fabric layer can be well adhered.

The water lock layer 30 is a core component of the present application for absorbing liquid and preventing liquid loss. In the present embodiment, the water lock layer is made of superabsorbent fibers and PE/PET composite fibers. The ratio of the superabsorbent fiber to the PE/PET composite fiber is 30:70-25:70. The obtained water-repellent layer 30 has a basis weight of 25 to 70 g/m ² , and preferably has a basis weight of 50 g/m ² .

The superabsorbent resin fiber is a fiber containing a water-absorbing group such as a -COOH, -COONa, -CONH2, and/or -OH group. In some embodiments, the superabsorbent resin fiber may be selected from one or more of the group consisting of polycarboxylate absorbent fibers, acrylic absorbent fibers, polyacrylonitrile absorbent fibers, polyvinyl alcohol absorbent fibers, Modified polyvinyl alcohol water-absorbing fiber. In other embodiments, the absorbent fibers may also be other suitable resin fibers. Preferably, the super absorbent resin fiber is a polycarboxylic acid water absorbent fiber. The PE/PET composite fiber is obtained by composite spinning with PE as the skin and PET as the core.

In the gauze sheet provided by the embodiment of the present application, when contacting blood or body fluid, the first non-woven fabric layer and the second non-woven fabric layer rapidly capture the body fluid and flow the body fluid to the water absorbing layer, the first water absorbing layer and the second water absorbing layer. It has a capillary structure that helps to quickly diffuse liquid into the highly absorbent water-locking layer; the body fluid combines with the hydrophilic group in the water-absorbing fiber in the water-blocking layer, and the body fluid does not rise from high even at normal temperature. The water-absorbent resin overflows, thereby achieving high water absorption and water retention characteristics, preventing body fluid from overflowing from the gauze, and maintaining the gauze sheet relatively clean and clean during use.

In other embodiments, one or more layers of functional structural layers within the gauze sheets disclosed in the above embodiments may also be omitted. For example, the first water absorbing layer and the second water absorbing layer can be reduced, and a water lock layer can be directly disposed in the gauze sheet.

Hereinafter, the gauze sheet used in the embodiment of the present application, a production method thereof, and test performance will be described in detail.

1. First, in the above-mentioned gauze sheet, the preparation method of each layer of the nonwoven fabric is as follows:

1.1. Selecting a PE/PP composite fiber to prepare a nonwoven fabric having a basis weight of 8-15 g/m ² as a first nonwoven fabric layer and a second nonwoven fabric layer;

1.2. Selecting a non-woven fabric having a basis weight of 20-30 g/m ² as a first water absorbing layer and a second water absorbing layer;

Wherein, the preparation method of preparing the first non-woven layer and the second non-woven layer by using the PE/PP composite fiber and preparing the first water-absorbing layer and the second water-absorbing layer by using the wood pulp fiber is the non-woven fabric commonly used in the prior art. The preparation method of the cloth will not be described here.

1.3. The water-blocking layer is prepared by using 30-75 parts of superabsorbent fiber and 25-70 parts of PE/PET composite fiber by weight.

The method for preparing the water-locking layer is as follows: 25-70 parts of PE/PET composite fiber is mixed with 30-75 parts of superabsorbent fiber by weight to obtain mixed fiber; and the mixed fiber is sequentially passed through an opener After opening the card, combing the carding machine, laying the netting machine and acupuncture needles, the water lock layer is obtained.

The water-repellent layer has a basis weight of 50 g/m ² ; wherein, in the embodiment, the superabsorbent fiber is preferably a white brand superabsorbent fiber produced by Nantong Jiangchao Textile Technology Co., Ltd.

2. The layers of the nonwoven fabric (or gauze) provided in the above examples are gauze raw materials, and the gauze sheets shown in the following Examples 1 to 4 are obtained:

Example 1

1) using a single layer of 5 g of cotton gauze with a basis weight of 25 g/m ² (count 40×40, density 28×20), which are sequentially combined from the bottom layer into five layers of composite gauze sheets;

2) Inserting a line of X-ray-detectable developing lines between the third layer and the fourth layer; the distance of the developing line from the edge of the gauze is at least 15 mm; and the overall basis weight of the gauze is 125 g/m ² .

Example 2

1) PE/PP composite fiber nonwoven fabric (gram weight 12g/m ² ) was selected in order as the first nonwoven fabric layer and the second nonwoven fabric layer of the gauze sheet; wood pulp fiber non-woven fabric (gram weight 25g/ m ² ), as the first water absorbing layer and the second water absorbing layer of the gauze sheet; a non-woven fabric (gram weight 50 g/m ² ) obtained by mixing 30% polycarboxylic acid super absorbent fiber and 70% PE/PET composite fiber As a water-locking layer of gauze pieces.

2) sequentially combining the bottom layer into a five-layer composite gauze sheet in order (the combination order is: a first nonwoven layer, a first water absorbing layer, a water-blocking layer, a second water absorbing layer, and a second nonwoven layer), wherein Between the first water absorbing layer and the water-blocking layer, a line of X-ray-detectable developing lines is embedded; the distance of the developing line from the edge of the gauze is at least 15 mm, and the total weight of the gauze is 124 g/m ² .

Example 3

1) PE/PP composite fiber nonwoven fabric (gram weight 12g/m ² ) was selected in order as the first nonwoven fabric layer and the second nonwoven fabric layer of the gauze sheet; wood pulp fiber non-woven fabric (gram weight 25g/ m ² ), as the first water absorbing layer and the second water absorbing layer of the gauze sheet; a non-woven fabric of 50% polycarboxylic acid superabsorbent fiber and 50% PE/PET composite fiber (gram weight 50 g/m ² ) As a water-locking layer of gauze pieces.

Example 4

1) PE/PP composite fiber nonwoven fabric (gram weight 12g/m ² ) was selected in order as the first nonwoven fabric layer and the second nonwoven fabric layer of the gauze sheet; wood pulp fiber non-woven fabric (gram weight 25g/ m ² ), as the first water absorbing layer and the second water absorbing layer of the gauze sheet; a non-woven fabric of 75% polycarboxylic acid superabsorbent fiber and 25% PE/PET composite fiber (gram weight 50 g/m ² ) As a water-locking layer of gauze pieces.

3. In order to further verify the technical effect of the gauze sheet provided by the embodiment of the present application, the following gauze pieces of the same shape produced in Examples 1-4 were sampled and corresponding performance tests were performed. The performance test items include: absorption of distilled water rate, water retention ratio after absorption of distilled water, absorption of 0.9% saline solution rate, and water retention ratio after absorption of 0.9% physiological saline. The specific test methods are as follows:

3.1. The gauze of Example 1 - Example 4 was selected, and 5 samples of 100 x 100 mm were randomly taken at different positions, and each pattern should contain 1 X-ray-detectable developing line.

3.2. The mass of the gauze piece to be tested is weighed by the balance and the mass before the water absorption is W1.

3.3. Water absorption rate test method

Hold one end of the gauze sample with a clip and make the clip jaw perpendicular to the longitudinal direction of the sample; immerse the sample together with the clip into distilled water (or 0.9% saline) about 10-15 cm deep, and gently press the sample. , so that it is completely immersed for 60s, then lift the clip, so that the sample completely leaves the water surface, after hanging vertically for 90s, weigh its weight W2.

3.4. Water retention rate test method

Place a gauze with distilled water (or 0.9% saline) and a weight of W2 on a suspended 20-mesh stainless steel wire mesh, place a glass piece on the gauze sample, and place a weight on the glass piece (glass piece) And the weight of the weight on the glass piece was 500 g and 1000 g in total, and the folding pressure was 0.5 kPa and 1 kPa, respectively, and the weight of the weighing sample at the time of pressurization for 10 minutes was W3.

3.5. Calculating the absorption ratio of distilled water, the water retention ratio after absorbing distilled water, the absorption rate of 0.9% physiological saline, and the water retention ratio after absorbing 0.9% physiological saline;

Wherein, the weight of absorbed distilled water (or 0.9% physiological saline) (g) = W2-W1;

Water absorption ratio of distilled water (or 0.9% physiological saline) = (W2-W1) / W1;

Water retention ratio of distilled water (or 0.9% physiological saline) = (W3-W1) / W1;

Take the average of the five test samples as the measurement results, accurate to two decimal places.

4. The test results of the water absorption ratio and the water retention ratio of the gauze sheets in the above Examples 1 to 4 are shown in Table 1 below:

Table 1 Example 1-4 Test results of water absorption and water retention ratio

Based on the test results shown in Table 1 above, the inventors found in the process of developing gauze pieces:

1) According to the comparison between Example 1 and Example 2-4, it can be seen that in the case where the gauze weight is substantially the same, the gauze sheet to which the water-locking layer is added has a significant increase in the water absorption ratio and the water retention ratio. It is two to four times that of traditional absorbent cotton gauze pieces.

2) According to the comparison of Examples 2-4, it can be seen that the gauze having the distribution ratio of Example 3 and Example 4 absorbs water when it is applied to different solvents (distilled water and 0.9% physiological saline) and different applied pressures. There is no significant drop in magnification and water retention ratio, and it has better applicability.

3) According to the comparison of Examples 2-4, it can be seen that as the weight fraction of the polycarboxylate superabsorbent fiber in the water-locked layer increases (from 30% to 75%), the water absorption ratio and the water retention ratio gradually increase. In the fourth embodiment, when the polycarboxylic acid superabsorbent fiber having a weight fraction of 75% is used, the water absorption ratio and the water retention ratio of the gauze sheet reach the highest near saturation, and the water absorption effect is superior.

The above description is only the embodiment of the present application, and thus does not limit the scope of the patent application, and the equivalent structure or equivalent process transformation of the specification and the drawings of the present application, or directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of this application.

Claims

A gauze sheet, comprising: a water lock layer disposed in the gauze sheet, the water lock layer being added with at least one superabsorbent fiber.
The gauze sheet according to claim 1, wherein the superabsorbent fiber is a carboxylic acid water absorbing fiber, an acrylic water absorbing fiber, a polyacrylonitrile water absorbing fiber, a polyvinyl alcohol water absorbing fiber or a modified polyethylene. Alcohol absorbent fiber.
A gauze sheet according to claim 2, wherein said water-blocking layer is made of said superabsorbent fiber and PE/PET composite fiber.
The gauze sheet according to claim 3, wherein the superabsorbent fiber is 30-75 parts by weight; and the PE/PET composite fiber is 25-70 parts.
The gauze sheet according to claim 2, wherein the superabsorbent fiber is a carboxylic acid-based water-absorbent fiber.
The gauze sheet according to claim 1, further comprising: a first water absorbing layer and a second water absorbing layer, wherein the water blocking layer is located between the first water absorbing layer and the second water absorbing layer; The first water absorbing layer and the second water absorbing layer are used to diffuse liquid to the water blocking layer.
The gauze sheet according to claim 6, wherein the first water absorbing layer and the second water absorbing layer are made of wood pulp fibers.
The gauze sheet according to claim 7, further comprising: an X-ray detectable developing line, said developing line being disposed between said first water absorbing layer and said water blocking layer.
The gauze sheet according to claim 6, wherein the outer surface of the gauze sheet is a first nonwoven fabric layer and a second nonwoven fabric layer;

The first water absorbing layer is disposed between the first nonwoven fabric layer and the water blocking layer, and the second water absorbing layer is disposed between the second nonwoven fabric layer and the water blocking layer.
The gauze sheet according to claim 9, wherein the first nonwoven fabric layer and the second nonwoven fabric layer are made of PE/PP composite fibers.