CN103668617B - Natural polymer yarn and its manufacturing method, mesh fabric and application - Google Patents

Abstract

The invention relates to a natural polymer yarn, a manufacturing method thereof, a mesh fabric and application. The manufacturing method of the natural polymer yarn comprises the following steps: preparing a natural polymer solution, and forming a natural polymer long fiber by wet spinning; the natural polymer long fiber and at least one of natural polymer fiber or chemical polymer fiber are subjected to mixed false twisting processing to form a natural polymer yarn. The invention also provides the natural polymer yarn prepared by the manufacturing method. The invention also provides a natural polymer mesh fabric containing the natural polymer yarn. The invention also provides application of the natural polymer mesh fabric in medical dressing. The natural polymer yarn can improve the strength and the elongation of the yarn so as to overcome the defects that polymer non-woven fabric dressing fibers in the prior art are easy to break and easy to remain on wounds.

Description

Natural polymer yarn and its manufacturing method, mesh fabric and application

technical field

The present invention relates to a manufacturing method of natural polymer yarn, and the natural polymer yarn prepared by the method; Molecular mesh fabric; the present invention is more about the use of a natural polymer mesh fabric for medical dressings.

Background technique

Most of the wound dressings in the prior art are cotton pads and gauze. Due to the poor antibacterial properties of such dressings, the probability of wound infection is high, and the phenomenon of sticking to the wound is easy to occur. Moreover, when the dressing is replaced, it has the disadvantage of being difficult to remove. And then cause the secondary injury of the wound. Therefore, in the existing technology, natural polymers such as alginate dressings or polysaccharide dressings are used as non-woven dressings to replace cotton pads, gauze and other material dressings, although non-woven dressings have better liquid absorption capacity and can provide moist environment. The characteristics of wound repair, but when the dressing is changed, the short fiber strength and elongation of the natural polymer non-woven dressing after absorbing liquid and swelling are insufficient, which makes the natural polymer non-woven dressing of the prior art easy to peel off, making the dressing difficult. It is removed, and some fibers may remain in the wound during dressing replacement, which not only has the risk of causing allergic reactions, but also increases the difficulty for medical staff to clean the wound and causes pain for users.

Contents of the invention

In order to solve the above technical problems, the object of the present invention is to provide a method for manufacturing natural polymer yarn, which can increase the strength and elongation of the yarn by adjusting the twist.

For reaching above-mentioned purpose, the present invention provides a kind of manufacture method of natural polymer yarn, it comprises the following steps:

Prepare a natural polymer solution and form a natural polymer long fiber by wet spinning or electro spinning;

The natural polymer long fiber and at least one polymer fiber are mixed with false twist to form a natural polymer yarn.

In the above manufacturing method, preferably, the natural polymer solution includes, but not limited to, chitosan solution, hyaluronic acid solution, collagen solution and alginate solution. The natural polymer solutions are all aqueous solutions, and the solvent water can be sterile water.

In the above manufacturing method, preferably, the concentration of the natural polymer solution is 3% to 8% based on the total weight; more preferably, the concentration of the natural polymer solution is 4% to 6%.

In the present invention, "wet spinning" refers to immersing the die of the extruder in the coagulation liquid, and after the natural polymer solution is squeezed into the coagulation liquid, it is solidified to form natural polymer fibers. "Electrospinning" as mentioned here refers to the natural polymer fiber formed by passing the charged polymer solution through an electrostatic field, injecting polymer filaments and then soaking in the coagulation solution to solidify.

In the present invention, "natural polymer long fiber" as referred to here refers to the natural polymer long fiber obtained through steps such as soaking glycerin solution and drying in natural polymer solution through textile processes such as wet spinning or electrospinning. Fiber; wherein, the glycerol solution is based on the total weight (wt), the concentration is 0.1wt% to 5wt%, and the solvent of the glycerin solution is ethanol aqueous solution with a concentration of 20wt% to 80wt%.

In the above manufacturing method, preferably, the at least one polymer fiber includes, but not limited to, natural polymer fibers and chemical polymer fibers. More preferably, the natural polymer fiber includes, but is not limited to chitosan fiber, hyaluronic acid fiber, collagen fiber and alginate fiber; the chemical polymer fiber includes, but not limited to polyester (polyester fiber) , nylon fiber (nylon fiber), polyethylene fiber (polyethylene fiber, PE fiber) and polypropylene fiber (polypropylene fiber, PP fiber).

In the present invention, "chemical polymer fiber" refers to a linear structure in which polymers obtained through chemical polymerization are interwoven.

In the present invention, "false twist" refers to untwisting after twisting the fiber, so that the fiber has irregular twist and has a bulky feeling.

The present invention further provides a natural polymer yarn prepared by the above-mentioned manufacturing method.

According to a specific embodiment of the present invention, preferably, the twist of the natural polymer yarn is 100 twists per meter (100t/m) to 200t/m, and the strength is 1.15 grams per denier (1.15g/den) to 1.25g/den and an elongation of 6.6% to 8.5%.

The present invention further provides a method for manufacturing a natural polymer mesh fabric, which includes the following steps: prepare a natural polymer yarn mentioned above, and form a natural polymer mesh fabric by weaving.

In the above manufacturing method, preferably, the weaving method includes, but not limited to plain weaving, twill weaving, satin weaving and three-dimensional weaving.

The present invention further provides a natural polymer mesh fabric prepared by the above manufacturing method, wherein the natural polymer mesh fabric is composed of the aforementioned natural polymer yarn and at least one polymer yarn.

In the above natural polymer mesh fabric, preferably, the at least one polymer yarn includes, but not limited to, natural polymer yarn and chemical polymer yarn. More preferably, the natural polymer yarns include, but are not limited to, chitosan yarns, hyaluronic acid yarns, collagen yarns and alginate yarns; the chemical polymer yarns include, but are not limited to Polyester yarn (polyester yarn), nylon yarn (nylon yarn), polyethylene yarn (polyethylene yarn, PE yarn) and polypropylene yarn (polypropylene yarn, PP yarn).

The present invention further provides a use of the above-mentioned natural polymer mesh fabric in a medical dressing, which includes using the medical dressing to cover or fill a wound.

In the above uses, preferably, the wounds include, but are not limited to, trauma wounds, decubitus wounds, scald wounds, diabetic foot wounds, venous ulcers, chronic ulcer wounds with extensive skin damage, and wounds that need to be filled with dressing materials.

The manufacturing method of the natural polymer yarn of the present invention is to carry out mixed false-twisting processing through the natural polymer long fiber and at least one polymer fiber to form a natural polymer yarn, and the twist of the natural polymer yarn is 100t/m to 200t/m, tenacity between 1.15g/den and 1.25g/den, and elongation between 6.6% and 8.5%, which can improve the strength and elongation of the yarn.

The natural polymer mesh fabric of the present invention is composed of the aforementioned natural polymer yarns and polymer yarns. The natural polymer mesh fabric can not only provide high liquid absorption and provide a moist environment for tissue repair, but also when When the natural polymer mesh fabric of the present invention is used in medical dressings (such as supplying wounds), the natural polymer mesh fabric can improve the strength and elongation of the medical dressing, thereby making the medical dressing easy to remove from the wound and The advantage of not easy to leave debris; and the natural polymer mesh fabric of the present invention is applied to medical dressings, and can be applied to wounds of various sizes or curved surfaces on the body surface, especially chronic difficult-to-heal, deep-layer and hyper-osmotic wounds.

Description of drawings

Fig. 1 is a three-dimensional appearance view of the natural polymer mesh fabric of the present invention.

Description of main component symbols:

1 Natural polymer mesh fabric

detailed description

Embodiment 1 prepares alginate yarn

Sodium alginate powder is adjusted to 4wt% to 5wt% sodium alginate mucus with sterile water, and extruded into a 5wt% calcium chloride (CaCl ₂ ) coagulation bath with a 250-hole and 0.08 mm (mm) spinning nozzle , to form calcium alginate fibers, and then wash the calcium alginate fibers with water, dip the fiber surface with 1wt% to 3wt% glycerin solution and perform wet spinning processes such as drying to make calcium alginate long fibers . The calcium alginate long fiber is subjected to long fiber false twist processing with a twisting machine to make alginate yarn. The obtained alginate yarn was tested for tensile properties of alginate calcium salt yarn by American Society for Testing and Materials D2256 (ASTM D2256). The test results are shown in Table 1.

As shown in Table 1, when the twist increases, the strength and elongation of the sample also tend to increase, but the liquid absorption of the sample decreases with the increase of twist. General medical dressings should have good liquid absorption, strength and elongation, so in this embodiment, when the twist of alginate yarn is 98t/m to 207t/m, it has better liquid absorption, strength and elongation.

Table 1 Tensile property test of alginate yarn

Sample (twist/meter) Danny (grams) Strength (g/denier) Elongation (%) Liquid absorption (%) Alginate Yarn 98 529.9 1.16 6.6 561 Alginate Yarn 158 637.5 1.22 7.7 490 Alginate Yarn 207 695.3 1.15 8.3 495 Alginate Yarn 430 698.4 0.78 6.4 399 Alginate Yarn 600 514.2 0.84 4.0 249

Embodiment 2 prepares chitosan yarn

Dissolve chitosan with 2 volume percent (vol%) acetic acid aqueous solution, and adjust to a chitosan solution with a concentration of 3wt% to 8wt%, and the chitosan solution is filtered with 5wt% sodium hydroxide The aqueous solution was used as a coagulation bath, and the chitosan fiber was produced by a wet spinning machine. During the wet spinning process, the chitosan fiber is soaked in a 0.1wt% to 5wt% glycerol solution and dried to produce chitosan long fibers. The chitosan long fiber is subjected to long fiber false-twisting processing with a twisting machine to make chitosan yarn.

Embodiment 3 prepares natural polymer mesh fabric

As shown in Figure 1, the alginate yarn obtained in the above-mentioned embodiment 1 or the chitosan yarn obtained in the embodiment 2 are used in the plain weaving mode of a weaving proofing machine to form a natural polymer mesh fabric 1 respectively. .

The present invention is further illustrated by the above-mentioned embodiments, which do not limit the disclosed content of the present invention. Those skilled in the art may make some improvements and modifications without departing from the scope of the present invention.

Claims (12)

1. a manufacture method of natural polymer yarn, it may further comprise the steps: Prepare a natural polymer solution, and form a natural polymer long fiber by wet spinning or electrospinning; False-twisting the long natural polymer fibers to form a natural polymer yarn, and the twist of the natural polymer yarn is 98t/m to 207t/m. 2. The method for producing natural polymer yarns according to claim 1, wherein the natural polymer solution is a chitosan solution, a hyaluronic acid solution, a collagen solution or an alginate solution. 3. The method for producing natural polymer yarn according to claim 1 or 2, wherein the natural polymer solution has a concentration of 3wt% to 8wt% based on the total weight. 4. The method for producing natural polymer yarn according to any one of claims 1-3, wherein the natural polymer solution has a concentration of 4wt% to 6wt% based on the total weight. 5. A natural polymer yarn obtained by the manufacturing method according to any one of claims 1 to 4. 6. The natural polymer yarn as claimed in claim 5, wherein the twist of the natural polymer yarn is 100t/m to 200t/m, the strength is 1.15g/den to 1.25g/den and the elongation is 6.6% to 8.5%. 7. A manufacturing method of a natural polymer reticular fabric, comprising the following steps: Prepare a natural polymer yarn described in claim 5 or 6 to form a natural polymer mesh fabric in a weaving manner. 8. The manufacturing method of natural polymer mesh fabric as claimed in claim 7, wherein the weaving method is plain weaving, twill weaving, satin weaving or three-dimensional weaving. 9. A natural polymer mesh fabric obtained by the manufacturing method according to claim 7 or 8, wherein the natural polymer mesh fabric is composed of natural polymer yarns. 10. The natural polymer mesh fabric according to claim 9, wherein the natural polymer yarn is chitosan yarn, hyaluronic acid yarn, collagen yarn or alginate yarn. 11. A use of the natural polymer mesh fabric as claimed in claim 9 or 10 in a medical dressing, comprising using the medical dressing to cover or fill a wound. 12. The use according to claim 11, wherein the wounds include trauma wounds, decubitus wounds, scald wounds, diabetic foot wounds, venous ulcers, chronic ulcers with large areas of skin damage, and wounds that need to be filled with dressing materials.