WO2019024372A1

WO2019024372A1 - Virus penetration-resistant film for operating gown and preparation method therefor

Info

Publication number: WO2019024372A1
Application number: PCT/CN2017/115149
Authority: WO
Inventors: 周喜峰
Original assignee: 江苏宏远新材料科技有限公司
Priority date: 2017-08-01
Filing date: 2017-12-08
Publication date: 2019-02-07
Also published as: CN107474523A

Abstract

A virus penetration-resistant film for an operating gown and a preparation method therefor. The virus penetration-resistant film for an operating gown comprises the following components in mass percentage: 94%-95% of thermoplastic polyurethane, 0.5%-1.5% of ABS resin, 4%-6% of silicon dioxide, and 0.1%-0.3% of antioxidant; materials for preparing the thermoplastic polyurethane comprise: 40-50 parts of polyester polyol, 15-20 parts of aromatic isocyanate, 18-22 parts of propylene glycol, and 4-8 parts of dibutyltin dilaurate.

Description

Anti-virus penetrating film for surgical gown and preparation method thereof

Technical field

The invention relates to the field of thin films, in particular to a virus-resistant penetrating film for surgical gowns and a preparation method thereof.

Background technique

With the continuous improvement of living standards, people's requirements for medical products are getting higher and higher, and the requirements for infection control are constantly improving during the operation. From the original protection of patients to the present, it is necessary to protect patients and protect medical care. The change of the concept of the person, the performance of the surgical gown used in the surgery has become one of the hotspots of people's attention.

At present, there are three types of surgical clothing fabrics that are more common in clinical practice: ordinary non-woven fabrics, flash evaporation one-time forming filter materials, and coated fabrics. The protective efficiency of surgical gowns made of ordinary non-woven fabrics is only about 40%, which cannot meet the minimum national standard. Requirements; DuPont Company's filter material made by flash evaporation molding has better protection performance, but its fabric has poor uniformity of protection. Some parts of the same fabric have high filtration efficiency, while some parts are very low; coated fabric The surgical gown produced has better protection effect, but its breathable and moisture permeable performance is very poor, which can not meet the comfort requirements, and the general coating is not degradable and does not meet environmental protection requirements.

Summary of the invention

The technical problem to be solved by the present invention is to provide a virus-resistant penetrating film for a surgical gown and a preparation method thereof, which can improve the barrier virus penetration rate of the polyurethane film, and the preparation process is simple and easy to control, and the prepared process is obtained. The film has good uniformity and high yield of finished products.

In order to solve the above technical problem, a technical solution adopted by the present invention is to provide a virus-resistant penetrating film for a surgical gown comprising the following components in a mass percentage: 94%-95% thermoplastic polyurethane, 0.5%-1.5% ABS resin, 4%-6% silica, 0.1%-0.3% antioxidant; wherein the thermoplastic polyurethane preparation raw material comprises: polyester polyol 40-45 parts, aromatic isocyanate 15- 20 parts, 18-22 parts of propylene glycol, and 4-8 parts of dibutyltin dilaurate.

In a preferred embodiment of the present invention, the anti-virus penetrating film for surgical gown comprises the following components in mass percentage: 94.9% thermoplastic polyurethane, 1% ABS resin, 4% slip agent, 0.1% Antioxidant.

In a preferred embodiment of the present invention, the anti-virus penetrating film for surgical gown comprises the following components in mass percentage: 94% thermoplastic polyurethane, 0.8% ABS resin, 5% slip agent, 0.2% Antioxidant.

In a preferred embodiment of the invention, the thickness of the anti-virus penetrating film for the surgical gown is 0.01-0.03 mm.

Another object of the present invention is to provide a method for preparing a virus-resistant penetrating film for a surgical gown, comprising the following steps:

1) Weighing the above formula amount of thermoplastic polyurethane, ABS resin, slip agent and antioxidant, put into the barrel and stir to obtain the mixture;

2) putting the above mixture into a dehumidifier for drying, controlling the water content ≤ 0.01%;

3) putting the above-mentioned dried mixture into a screw extruder and extruding and plasticizing to obtain a melt;

4) Introducing the melt into the die, finally forming a blown film by the die, and winding and dividing to obtain the virus-resistant penetrating film for the surgical gown.

In a preferred embodiment of the invention, the die comprises: a core, a die ring, a core joint, and a die. a shell, a middle core, a core body and a mold neck, the core being mounted at an upper end of the core body and connected together by the core joint, the mold ring being sleeved outside the core Fixed at an upper end of the mold case, the middle core is installed between the mold shell and the core body and can rotate the mold core body, and the mold neck is mounted at a lower end of the mold core body. A melt passage is disposed in the mold neck, and a top plug is disposed at a joint of the melt passage and the die.

The beneficial effects of the invention are: by adjusting the raw material ratio, adding synthetic silica instead of the traditional magnesium silicate to improve the compatibility of the product, thereby avoiding the film from generating voids due to poor compatibility between the materials, and the film can be significantly improved. Resistance to hydrostatic pressure and the barrier effect on viruses, the addition of ABS resin can effectively improve the temperature resistance of the film, avoid damage caused by ultrasonic hot pressing during the hot pressing of the surgical gown, and use the blown film forming process in the preparation process. The uniformity of the obtained film is good, the yield of the finished product is high, and the barrier virus rate of each part of the film is ensured, and the uniformity of protection is reliable.

DRAWINGS

1 is a schematic structural view of a preferred embodiment of a die used in the present invention;

The components in the drawings are marked as follows: core, 2, mold ring, 3, core joint, 4, mold shell, 5, core body, 6, center core, 7, top plug, 8, mold neck .

Detailed ways

The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings, in which the advantages and features of the invention can be more readily understood by those skilled in the art.

Referring to FIG. 1, an embodiment of the present invention includes:

Embodiment 1

1) Ingredients: preferred, the preparation of the anti-virus penetrating film for surgical gowns: 94.9% thermoplastic polyurethane, 1% ABS resin, 4% slip agent, 0.1% antioxidant; The preparation raw material of the thermoplastic polyurethane comprises: 42 parts of polyester polyol, 17 parts of aromatic isocyanate, 19 parts of propylene glycol, and 5 parts of dibutyl tin dilaurate;

2) drying: mixing and stirring the above raw materials in a barrel to obtain a mixture;

3) Dehumidification drying: the above mixture is placed in a dehumidifier for drying, and the moisture content is controlled to be ≤0.01%;

3) Plasticizing of the screw extruder: the dried mixture is put into a screw extruder and extruded to obtain a melt;

4) Die blown film forming: the melt is introduced into a die, and finally formed by blow molding of a die, and the film is cut and divided to obtain a virus-resistant film for the surgical gown.

Wherein, the thickness of the anti-virus penetrating film for the surgical gown obtained is 0.01-0.03 mm, and the performance of the film is in compliance with the American ASTM F1671-2013 standard, and the product meets the phage permeability requirement.

Embodiment 2

1) Ingredients: preferred, the preparation of the anti-virus penetrating film for surgical gowns: 94% thermoplastic polyurethane, 0.8% ABS resin, 5% slip agent, 0.2% antioxidant; The preparation raw material of the thermoplastic polyurethane comprises: 45 parts of polyester polyol, 16 parts of aromatic isocyanate, 20 parts of propylene glycol, and 7 parts of dibutyltin dilaurate;

3) Plasticizing of screw extruder: the dried mixture is put into the screw extruder and extruded and plasticized. To the melt;

Preferably, the specific structure of the die used in the embodiment of the present invention includes: a core 1, a die ring 2, a core joint 3, a mold shell 4, a middle core 6, a core body 5, and a mold neck 6, The core 1 is fixedly coupled to the upper end of the core body 5 through the core joint 3, and the mold ring 2 is sleeved on the outer side of the core 1 and fixed to the upper end of the mold shell 4, The middle core 6 is installed between the mold shell 4 and the core body 5 and can rotate the core body 5, and the mold neck 8 is mounted at the lower end of the core body 5, the mold neck There is a melt channel in the 8 and a plug of 7 is installed at the junction of the melt channel and the die. The melt obtained by extrusion and plasticization by a screw extruder enters the die from the melt passage, and the middle core 6 drives the core body 5 to rotate, and the air entering the core body 5 is blown out in a rotating manner to ensure the slave mode. The melt from the mouth is cooled evenly, so that the thickness of the formed film is uniform.

The invention discloses a virus-resistant penetrating film for a surgical gown and a preparation method thereof, and the compatibility of the product is improved by adjusting the raw material ratio and adding synthetic silica instead of the traditional magnesium silicate, thereby avoiding the film due to the material between the materials. Poor compatibility and void formation can significantly improve the hydrostatic pressure resistance of the film and the barrier effect on the virus. Adding ABS resin can effectively improve the temperature resistance of the film and avoid damage caused by ultrasonic hot pressing during the hot pressing of the surgical gown. At the same time, the die-blown film forming process is adopted in the preparation process, so that the obtained film has good uniformity and high qualified rate of the finished product, and can ensure the barrier virus rate of each part of the film is equivalent, and the uniformity of protection is reliable.

The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformation of the present invention and the contents of the drawings may be directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of the present invention.

Claims

A virus-resistant penetrating film for surgical gowns comprising the following components in a mass percentage: 94%-95% thermoplastic polyurethane, 0.5%-1.5% ABS resin, 4%-6% dioxide dioxide Silicon, 0.1%-0.3% of an antioxidant; wherein the preparation of the thermoplastic polyurethane comprises: 40-45 parts of polyester polyol, 15-20 parts of aromatic isocyanate, 18-22 parts of propylene glycol, dilauric acid Dibutyltin 4-8 parts.
The anti-virus penetrating film for a surgical gown according to claim 1, wherein the anti-virus penetrating film for surgical gown comprises the following components in a mass percentage: 94.9% thermoplastic polyurethane, 1% ABS resin 4% slip agent, 0.1% antioxidant.
The anti-virus penetrating film for a surgical gown according to claim 1, wherein the anti-virus penetrating film for surgical gown comprises the following components in a mass percentage: 94% thermoplastic polyurethane, 0.8% ABS resin 5% slip agent, 0.2% antioxidant.
The anti-virus penetrating film for a surgical gown according to claim 1, wherein the surgical film has a thickness of the virus-resistant penetrating film of 0.01 to 0.03 mm.
A method for preparing a virus-resistant penetrating film for a surgical gown according to any one of claims 1 to 4, characterized in that it comprises the following steps:

1) Weighing the above formula amount of thermoplastic polyurethane, ABS resin, slip agent and antioxidant, put into the barrel and stir to obtain the mixture;

2) putting the above mixture into a dehumidifier for drying, controlling the water content ≤ 0.01%;

3) putting the above-mentioned dried mixture into a screw extruder and extruding and plasticizing to obtain a melt;

4) Introducing the melt into the die, finally forming a blown film by the die, and winding and dividing to obtain the virus-resistant penetrating film for the surgical gown.
The method for preparing a virus-resistant penetrating film for a surgical gown according to claim 5, characterized in that The die includes: a core, a die ring, a core joint, a mold shell, a center core, a core body, and a mold neck, the core being mounted at an upper end of the core body and passing through the mold The core joints are coupled together, the mold ring is sleeved on the outer side of the mold core and fixed at an upper end of the mold core, the middle core is mounted between the mold shell and the mold core body and can drive the mold core The mold core is rotated, the mold neck is mounted at a lower end of the core body, a melt passage is disposed in the mold neck, and a top plug is disposed at a joint of the melt passage and the die.