CN-117841499-B - Degradable surgical gown fabric and preparation method thereof

CN117841499BCN 117841499 BCN117841499 BCN 117841499BCN-117841499-B

Abstract

The invention relates to a degradable surgical gown fabric which comprises an upper layer of PLA non-woven fabric, a lower layer of PLA non-woven fabric and a middle layer of degradable film, wherein the PLA non-woven fabric and the degradable film are bonded by degradable hot melt adhesive, and the surgical gown fabric comprises 18g/m 2 PLA non-woven fabric, 2g/m 2 degradable hot melt adhesive, 20g/m 2 degradable film, 2g/m 2 degradable hot melt adhesive and 18g/m 2 PLA non-woven fabric from bottom to top. The surgical gown fabric prepared by the invention is composed of PLA non-woven fabrics, degradable hot melt adhesive and degradable films, so that the surgical gown fabric has stronger degradable performance, and the longitudinal and transverse stretching rates of the PLA non-woven fabrics, the degradable hot melt adhesive and the degradable films are equivalent by adjusting the contents of the components of the degradable hot melt adhesive and the degradable films, so that the breaking elongation of the fabric is more than or equal to 350%, the dry breaking strength is more than or equal to 65kPa, and the performance requirements of the surgical gown are met.

Inventors

YANG MIAN
SUN GUANJUN
WEI DA
CAO HUIJING

Assignees

新乐华宝医疗用品有限公司

Dates

Publication Date: 20260508
Application Date: 20231218

Claims (4)

1. The degradable surgical gown fabric is characterized by comprising an upper layer of PLA non-woven fabric, a lower layer of PLA non-woven fabric and a degradable film of an intermediate layer, wherein the PLA non-woven fabric and the degradable film are bonded by degradable hot melt adhesive; the degradable film comprises the following raw materials in parts by weight: 50-60 parts of modified polylactic acid; 10-15 parts of polycaprolactone; 2-5 parts of polycarbonate; 10-15 parts of modified polyhydroxyalkanoate; The degradable hot melt adhesive comprises the following raw materials in parts by weight: 3-6 parts of polyether amine; 15-30 parts of unsaturated polyester resin; 0.2-0.5 part of antibacterial agent; 1-3 parts of flame retardant; 20-25 parts of vegetable oil-based plasticizer; The raw materials and the weight portions of the modified polylactic acid are 25 to 30 portions of polylactic acid, 15 to 20 portions of tributyl citrate, 3 to 8 portions of cumene peroxide, 1 to 2 portions of tetrabutyl titanate and 1 to 5 portions of surfactant; The preparation method of the modified polylactic acid comprises the steps of under the condition that the pressure is 30-50Pa, melting and mixing 25-30 parts of raw material polylactic acid, 15-20 parts of tributyl citrate, 3-8 parts of cumene peroxide, 1-2 parts of tetrabutyl titanate and 1-5 parts of surfactant, wherein the melting temperature is 140-200 ℃ to obtain the modified polylactic acid; the modified polyhydroxyalkanoate comprises, by weight, 100 parts of polyhydroxyalkanoate and 5-20 parts of maleic anhydride; The preparation method of the modified polyhydroxyalkanoate comprises the steps of dissolving 100 parts of polyhydroxyalkanoate and 5-20 parts of maleic anhydride serving as raw materials in an ethanol solvent, adding an inorganic peroxide initiator for polymerization reaction, and centrifuging, washing and drying after the reaction is finished to obtain the modified polyhydroxyalkanoate; the breaking elongation of the fabric of the operating coat is more than or equal to 350 percent, the dry state breaking strength is more than or equal to 65kPa, and the air permeability is more than or equal to 170m <2 >/s; The flame retardant of the degradable hot melt adhesive adopts a phosphorus-nitrogen flame retardant.
2. The degradable surgical gown fabric of claim 1, wherein the polylactic acid is prepared from corn starch.
3. The method for preparing the degradable surgical gown fabric according to claim 1, including the steps of: The preparation of the degradable film comprises the steps of respectively drying and dehumidifying 50-60 parts of raw material modified polylactic acid, 10-15 parts of polycaprolactone, 2-5 parts of polycarbonate and 10-15 parts of modified polyhydroxyalkanoate, uniformly stirring, heating to 150-190 ℃ by a casting machine, plasticizing and extruding, enabling the thickness of the extruded film to be 20g/m 2 , finally, synthesizing into a film at 15-20 ℃, and rolling into a coiled material by swing trimming corona treatment after film formation; The preparation of degradable hot melt adhesive comprises the steps of putting 3-6 parts of polyether amine, 15-30 parts of unsaturated polyester resin, 0.2-0.5 part of antibacterial agent, 1-3 parts of flame retardant and 20-25 parts of vegetable oil-based plasticizer into a melt mixer for fully mixing, wherein the melting temperature is 160-180 ℃; And (3) bonding and forming, namely bonding the lower PLA non-woven fabric, the middle degradable film and the upper PLA non-woven fabric sequentially through degradable hot melt adhesive to form the operating coat fabric, wherein the operating coat fabric comprises 18 g/m 2 PLA non-woven fabric, 2 g/m 2 degradable hot melt adhesive, 20 g/m 2 degradable film, 2 g/m 2 degradable hot melt adhesive and 18 g/m2PLA non-woven fabric from bottom to top.
4. The method for preparing the degradable surgical gown fabric according to claim 3, wherein the surgical gown fabric is formed by laminating PLA non-woven fabrics, degradable hot melt adhesives and degradable films through a 5.5MPa compression roller in the bonding forming process.

Description

Degradable surgical gown fabric and preparation method thereof Technical Field The invention relates to the technical field of medical textiles, in particular to a degradable surgical gown fabric and a preparation method thereof. Background The disposable operating coat is a protective coat specially designed for the operation process, and aims to protect medical staff from being affected by microorganisms such as bacteria and viruses and to minimize the transmission of infectious substances to the operation wound of a patient. It is made of sterile fibrous material and generally includes parts such as hats, coats, pants, and the like. The operating gown has the performances of water resistance, bacteria resistance and the like, and can effectively isolate and protect pathogens in an operating room. Disposable surgical gowns are made of nonwoven fabrics or film-coated nonwoven fabric composites having certain protective properties, which, although excellent traction and abrasion resistance, adsorption function and water pressure resistance, can still present some potential problems. Some surgical gowns may be made of non-degradable materials such as polyethylene, polypropylene, polyester or nylon synthetic fibers. These materials are difficult to decompose in the natural environment and may cause environmental pollution. Disclosure of Invention The invention aims to provide a degradable surgical gown fabric and a preparation method thereof, which are used for solving the technical problem of long natural degradation time of surgical gowns in the prior art. The invention relates to a degradable surgical gown fabric and a preparation method thereof, and the specific technical scheme is as follows: The degradable surgical gown fabric comprises an upper layer of PLA non-woven fabric and a lower layer of PLA non-woven fabric and a middle layer of degradable film, wherein the PLA non-woven fabric and the degradable film are bonded by degradable hot melt adhesive, and the surgical gown fabric comprises 18g/m 2 PLA non-woven fabric, 2g/m 2 degradable hot melt adhesive, 20g/m 2 degradable film, 2g/m 2 degradable hot melt adhesive and 18g/m 2 PLA non-woven fabric from bottom to top; the degradable film comprises the following raw materials in parts by weight: 50-60 parts of modified polylactic acid; 10-15 parts of polycaprolactone; 2-5 parts of polyester carbonic acid; 10-15 parts of modified polyhydroxyalkanoate; The degradable hot melt adhesive comprises the following raw materials in parts by weight: 3-6 parts of polyether amine; 15-30 parts of unsaturated polyester resin; 0.2-0.5 part of antibacterial agent; 1-3 parts of flame retardant; 20-25 parts of vegetable oil-based plasticizer. Preferably, the raw materials and the weight parts of the modified polylactic acid are 25-30 parts of polylactic acid, 15-20 parts of tributyl citrate, 3-8 parts of cumene peroxide, 1-2 parts of tetrabutyl titanate and 1-5 parts of surfactant. Preferably, the polylactic acid is prepared from corn starch. Preferably, the modified polyhydroxyalkanoate comprises 100 parts by weight of polyhydroxyalkanoate and 5-20 parts by weight of maleic anhydride. Preferably, the breaking elongation of the fabric of the operating coat is more than or equal to 350 percent, the dry state breaking strength is more than or equal to 65kPa, and the air permeability is more than or equal to 170m 2/s. Preferably, the antibacterial agent of the degradable hot melt adhesive is chitosan extracted from crab shells, and the flame retardant is phosphorus-nitrogen flame retardant. The invention also provides a preparation method of the degradable surgical gown fabric, which comprises the following steps: The preparation of the degradable film comprises the steps of respectively drying and dehumidifying 50-60 parts of raw material modified polylactic acid, 10-15 parts of polycaprolactone, 2-5 parts of polyester carbonic acid and 10-15 parts of modified polyhydroxyalkanoate, uniformly stirring, heating to 150-190 ℃ by a casting machine, plasticizing and extruding, forming a film with the thickness of 20g/m 2 by roller synthesis at 15-20 ℃, and rolling into coiled materials by swing trimming corona treatment after film formation; The preparation of degradable hot melt adhesive comprises the steps of putting 8-15 parts of raw material polyetheramine, 16-30 parts of unsaturated polyester resin, 0.2-0.5 part of antibacterial agent, 1-3 parts of flame retardant and 20-25 parts of vegetable oil-based plasticizer into a melt mixer for fully mixing, wherein the melting temperature is 160-180 ℃; And (3) bonding and forming, namely bonding the lower PLA non-woven fabric, the middle degradable film and the upper PLA non-woven fabric sequentially through degradable hot melt adhesive to form the operating coat fabric, wherein the operating coat fabric comprises 18g/m 2 PLA non-woven fabric, 2g/m 2 degradable hot melt adhesive, 20g/m 2 degradable film, 2g/m 2 degradable hot melt