CN114633535A - Degradable medical protective clothing material and preparation method and application thereof - Google Patents
Degradable medical protective clothing material and preparation method and application thereof Download PDFInfo
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- CN114633535A CN114633535A CN202210335141.3A CN202210335141A CN114633535A CN 114633535 A CN114633535 A CN 114633535A CN 202210335141 A CN202210335141 A CN 202210335141A CN 114633535 A CN114633535 A CN 114633535A
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- 238000002360 preparation method Methods 0.000 title abstract description 9
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 claims abstract description 23
- -1 poly butylene succinate Polymers 0.000 claims abstract description 20
- 229920000742 Cotton Polymers 0.000 claims abstract description 18
- 229920000954 Polyglycolide Polymers 0.000 claims abstract description 13
- 229920002961 polybutylene succinate Polymers 0.000 claims abstract description 13
- 239000004631 polybutylene succinate Substances 0.000 claims abstract description 13
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- 238000013329 compounding Methods 0.000 claims abstract description 7
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- 229920005586 poly(adipic acid) Polymers 0.000 claims abstract description 4
- 229920001707 polybutylene terephthalate Polymers 0.000 claims abstract description 4
- AXKZIDYFAMKWSA-UHFFFAOYSA-N 1,6-dioxacyclododecane-7,12-dione Chemical compound O=C1CCCCC(=O)OCCCCO1 AXKZIDYFAMKWSA-UHFFFAOYSA-N 0.000 claims description 16
- ZMKVBUOZONDYBW-UHFFFAOYSA-N 1,6-dioxecane-2,5-dione Chemical compound O=C1CCC(=O)OCCCCO1 ZMKVBUOZONDYBW-UHFFFAOYSA-N 0.000 claims description 11
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/12—Surgeons' or patients' gowns or dresses
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/02—Layered materials
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
- A41D31/10—Impermeable to liquids, e.g. waterproof; Liquid-repellent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/06—Vegetal fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
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- B32B2307/716—Degradable
- B32B2307/7163—Biodegradable
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
- B32B2307/7246—Water vapor barrier
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2437/00—Clothing
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
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Landscapes
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- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Materials For Medical Uses (AREA)
Abstract
The invention relates to a high polymer material, and particularly discloses a degradable medical protective clothing material, and a preparation method and application thereof. The degradable medical protective clothing material comprises an outer layer made of a biodegradable film, an inner layer made of all-cotton spunlace and a water-soluble adhesive positioned between the inner layer and the outer layer; the biodegradable film comprises the following components in parts by weight: 10-40 parts of polyglycolic acid, 30-70 parts of poly adipic acid/butylene terephthalate and 5-30 parts of poly butylene succinate. The medical protective clothing is made of biodegradable raw materials, so that the material has excellent biodegradable characteristics, excellent mechanical properties and softness, and the water vapor barrier property of the material can be further improved by adding polybutylene succinate and polybutylene adipate/terephthalate into a biodegradable film and compounding the polybutylene succinate and the polybutylene adipate/terephthalate in a specific ratio.
Description
Technical Field
The invention relates to a high polymer material, in particular to a degradable medical protective clothing material and a preparation method and application thereof.
Background
Medical personnel often come into contact with blood, body fluids, secretions and the like of patients containing viruses during contact with the patient, surgery, therapeutic activities, and the like, thereby presenting an increased risk of infection. Therefore, medical protective clothing becomes a daily necessary consumable for medical personnel. The medical protective clothing refers to protective clothing used by medical staff (doctors, nurses, public health staff, cleaning staff and the like) and people entering specific medical and health areas (such as patients, hospital visitors, staff entering infected areas and the like), and has the functions of isolating germs, harmful ultrafine dust, acid-base solution, electromagnetic radiation and the like, ensuring the safety of the staff and keeping the environment clean.
The existing medical protective clothing mainly adopts PE, PP and PU non-woven fabrics which are poor in degradability, secondary pollution can be caused in soil for a long time after direct landfill treatment after disinfection, secondary pollution can be caused to air after incineration, and effective environment friendliness is lacked.
The biodegradable material is a plastic which can meet the use requirements in the storage period and can be degraded into substances harmless to the environment under natural environmental conditions after being used, and is considered to be one of effective ways for solving the problem of plastic pollution. Currently, there are PLA, PBAT, PBS, PCL and PGA available as degradable plastic films. Chinese patent (212393989U) discloses a degradable respiratory membrane for medical protective clothing, and the invention blends PLA and PBAT to obtain a biodegradable composite membrane, but the degradable membrane is hard, low in tensile strength and poor in water vapor barrier property and comfort level.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a degradable medical protective clothing material, a preparation method and application thereof.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a degradable medical protective clothing material, which comprises an outer layer made of a biodegradable film, an inner layer made of all-cotton spunlace and a water-soluble adhesive positioned between the inner layer and the outer layer;
the biodegradable film comprises the following components in parts by weight:
10-40 parts of polyglycolic acid, 30-70 parts of poly (butylene adipate/terephthalate) and 5-30 parts of polybutylene succinate.
According to the invention, the medical protective clothing material is prepared from biodegradable raw materials, so that the medical protective clothing material has excellent biodegradable characteristics, wherein the inner layer adopts the all-cotton spunlace fabric to ensure the biodegradable performance of the material, the mechanical property and the softness of the material can be improved, and the wearing comfort of the medical protective clothing material is improved.
The biodegradable film is added with the poly (butylene succinate) so as to accelerate the degradation rate of the material and improve the water vapor barrier property of the material; the water vapor barrier property of the material can be further improved by compounding the polybutylene succinate and the polybutylene adipate/terephthalate according to a specific proportion.
As a preferred embodiment of the medical protective clothing material, the biodegradable film comprises the following components in parts by weight:
15-35 parts of polyglycolic acid, 40-65 parts of poly adipic acid/butylene terephthalate and 7.5-25 parts of poly butylene succinate.
When the biodegradable film adopts the raw materials in parts by weight, the degradation rate of the material can be further improved, and the mechanical property and the barrier property of the material can also be improved.
As a preferable embodiment of the material for the medical protective clothing, the gram weight of the biodegradable film is 12-60 g/m2。
In a preferred embodiment of the material for medical protective clothing of the present invention, the basis weight of the all-cotton spunlace fabric is 30 to 60g/m2。
As a preferable embodiment of the medical protective clothing material, the number average molecular weight of the poly (butylene adipate/terephthalate) is 60000-70000.
When the molecular weight of the poly (butylene adipate)/terephthalate is adopted, the prepared biodegradable film has excellent biodegradability and mechanical property. The molecular chain process of the poly (butylene adipate)/terephthalate is not beneficial to biodegradation when the molecular weight is too large, and the barrier property of the material is reduced because the mechanical property of a degradable film with too low molecular weight influences the structure of the material.
In a preferred embodiment of the material for medical protective clothing of the present invention, the water-soluble adhesive has a grammage of 1 to 5g/m2。
When the biodegradable film, the all-cotton spunlace fabric and the water-soluble adhesive are selected according to the weight, the comprehensive performances of the medical protective clothing material in terms of biodegradation rate, tensile strength, softness, water vapor barrier property and the like can be improved.
As a preferable embodiment of the medical protective clothing material, the biodegradable film is made by adopting a casting or film blowing mode. Preferably, the biodegradable film is made by film blowing.
As a preferable embodiment of the medical protective clothing material, the medical protective clothing material is prepared by one of glue scraping, net roller transfer and glue spraying. Preferably, the medical protective clothing material is made by adopting a glue spraying mode.
The invention also provides a preparation method of the medical protective clothing material, which comprises the following steps:
1) drying polyglycolic acid, poly (butylene adipate/terephthalate) and poly (butylene succinate) according to the proportion, adding into an extruder for melt extrusion, and blowing for molding to obtain a biodegradable film;
2) the biodegradable film and the all-cotton spunlace are compounded at high speed, and the coating weight is 1-5 g/m2The water-soluble adhesive is used for preparing the material of the medical protective clothing.
As a preferred embodiment of the preparation method of the medical protective clothing material, in the step 2), the composite pressure is 0.1-0.3MPa at 40-250 m/min.
Preferably, the blown film has a blown film ratio of 1:3 and an extruder aspect ratio of 28: 1.
In addition, the invention also provides application of the medical protective clothing material in medical supplies.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a medical protective clothing material and a preparation method and application thereof, the medical protective clothing is made of biodegradable raw materials, so that the material has excellent biodegradable characteristics, excellent mechanical properties and softness, and the degradation rate of the material can be accelerated by adding poly (butylene succinate) into a biodegradable film, the hydrostatic pressure of the material can be improved, and the water vapor barrier property of the material can be further improved; the water vapor barrier property of the material can be further improved by compounding the polybutylene succinate and the polybutylene adipate/terephthalate according to a specific proportion.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
In the following examples and comparative examples, the experimental methods used were conventional ones unless otherwise specified, and the materials, reagents and the like used were commercially available ones unless otherwise specified.
The starting materials for the examples and comparative examples are commercially available from the following sources:
all-cotton spunlace-1: SCB-401615 (NB), available from Nopont nonwoven, Hangzhou;
all-cotton spunlace fabric-2: SCB-401615 (JSF), available from Guangdong gold science and technology, Inc.;
all-cotton spunlace fabric-3: SCB-401615 (JSF), available from Dali Raylen nonwovens group, Inc.;
spun-bonded nonwoven fabric: WFB-331615 (JSF), available from Guangdong gold science and technology, Inc.;
polyglycolic acid: the trade name PGA-201-1412, available from Yinjia degradation new material Co., Ltd, Zhejiang;
poly (butylene adipate/terephthalate 1): the brand KPBAT-S3W1910, the number average molecular weight 60000-70000, and the molecular weight is purchased from Jinfa science and technology, Inc.;
poly (butylene adipate/terephthalate 2): KPBAT-S3W1915, number average molecular weight 40000-;
poly (butylene adipate/terephthalate) 3: the trade name KPBAT-S3W1915, the number average molecular weight 80000-;
polybutylene succinate: SRJ-201, available from Hangao (China) investment, Inc.;
water-soluble adhesive: SRJ-201, available from Hangao (China) investment, Inc.
Examples 1 to 26
Examples 1-26 and comparative examples 1-7 provide a material for medical protective clothing, the formulation of which in parts by weight is shown in table 1, and the preparation method is as follows:
1) drying polyglycolic acid, poly (butylene adipate/terephthalate) and poly (butylene succinate) according to the proportion, adding the dried poly (glycolic acid), the poly (butylene adipate/terephthalate) and the poly (butylene succinate) into a screw extruder for melt extrusion, wherein the temperatures from a feed inlet to different areas of a machine head are respectively 140 ℃, 180 ℃, and performing film blowing molding, the film blowing ratio of the film blowing is 1:3, the length-diameter ratio of the extruder is 28:1, obtaining a biodegradable film, and ensuring the uniform thickness of the film by adjusting the adding speed (traction ratio: 3-7) of the poly (butylene succinate);
2) the prepared biodegradable film and the all-cotton spunlace-1 are compounded at a high speed, the compounding speed is 80m/min, the compounding pressure is 0.2MPa, and a water-soluble adhesive is smeared to prepare the medical protective clothing material.
TABLE 1
The materials prepared in examples 1 to 26 and comparative examples 1 to 7 were subjected to a performance test:
1) the biodegradation rate is as follows: measuring the biodegradation rate of the material after 90 days according to 'evaluation of biodegradability of textile non-woven fabric carbon dioxide release measuring method' GB/T33616-2017;
2) tensile strength: the tensile strength of the material was determined using an electronic Strength Meter according to GB/T3923.1-1997
3) Softness: the measurement of the fabric drapability was carried out according to the dynamic method of GB/T23329-2009 measurement of the drapability of textile fabrics, using a softness tester.
4) Hydrostatic pressure: hydrostatic pressure tests were performed using a water impermeability tester according to GB/T4744-1997 method.
The test results are shown in Table 2.
TABLE 2
Referring to table 1, the medical protective clothing material prepared by using all-cotton spunlaced fabrics of different types in examples 1 to 3 has a biodegradability of 95 to 97 percent after 90-day testing, has excellent biodegradability, and has good tensile strength, water vapor barrier property and softness.
Examples 4 to 7 show that the medical protective clothing material prepared from the polybutylene adipate/terephthalate in different parts by weight has a biodegradation rate of not less than 85% and better tensile strength, water vapor barrier property and softness after 90 days of testing, and the effects of examples 5 to 6 are better than those of examples 4 and 7, which shows that the polybutylene adipate/terephthalate has a larger influence on the biodegradation rate of the protective clothing.
In the embodiments 8-11, the medical protective clothing material prepared by adopting the polybutylene succinate with different weight parts has better comprehensive performance; examples 9-10 are better than 8, 11.
The polyglycolic acid in different parts by weight is adopted in examples 12-15, so that the biodegradability and the water vapor barrier property of the medical protective clothing material are obviously affected, and the biodegradability and the water vapor barrier property of the medical protective clothing material prepared in examples 13-14 are better than those of examples 12 and 15.
Examples 16 to 18 adopt all-cotton spunlaced fabrics-1 with different gram weights, examples 19 to 20 adopt adhesives with different gram weights, examples 21 to 23 adopt biodegradable films with different gram weights, and the tensile strength and hydrostatic pressure of the prepared medical protective clothing gradually increase and the softness thereof decreases with the increase of the gram weights of the all-cotton spunlaced fabrics-1, the adhesives and the biodegradable films.
The biodegradation rate of the medical protective clothing material prepared in example 25 is 96% after 90 days, which shows that when the molecular weight of the poly (butylene adipate/terephthalate) is lower than 60000-70000, the degradation rate and the softness of the material are basically kept unchanged, the tensile strength of the material is reduced compared with that of example 1, and further shows that the molecular weight of the poly (butylene adipate/terephthalate) between 60000-70000 has a gain effect on the mechanical and water vapor barrier properties of the biodegradable film.
The biodegradation rate of the medical protective clothing material prepared in example 26 in 90 days is 92%, which shows that when the molecular weight of the poly (butylene adipate/terephthalate) is higher than 60000-70000, the mechanical property, the softness and the hydrostatic pressure of the material are basically kept unchanged, the degradation rate of the material is reduced compared with example 1, and further shows that the molecular weight of the poly (butylene adipate/terephthalate) between 60000-70000 has a gain effect on the degradation rate of the biodegradable film.
In the medical protective clothing material prepared in the comparative example 1, the all-cotton spunlace-1 is replaced by the spun-bonded non-woven fabric, the biodegradation rate of the material is only 15% after 90 days of testing, the material has no biodegradable characteristic, the tensile strength of the material is reduced, the softness is poor (234mN is increased to 564mN), and the comfort is reduced.
The material prepared in the comparative example 2 does not contain a biodegradable film, the biodegradation rate of the material after 90 days of testing can reach 84%, the material has better biodegradability, the tensile strength and the softness of the material in the comparative example 2 are similar to those in the example 24, but the hydrostatic pressure of the material is reduced by 90%, and the fabric loses the water vapor barrier property and cannot be used as a medical protective clothing material.
The softness of the material of comparative example 3 (not containing the all-cotton spunlace fabric-1) and the material of example 24 is basically kept unchanged, but the tensile strength of the material is seriously reduced, and the hydrostatic pressure is also sharply reduced, which shows that the combination of the all-cotton spunlace fabric-1 and the biodegradable film has obvious improvement on the mechanical property and the barrier property of the material, the degradation effect is better than that of the single layer of biodegradable film, the mechanical property and the barrier property of the single biodegradable film are lower, and the material cannot be used as a material of medical protective clothing.
The biodegradable film prepared in the comparative example 4 is not added with the poly (butylene succinate), the biodegradation rate of the prepared medical protective clothing material after 90 days is measured to be 70%, which shows that the material degradation rate is reduced when the poly (butylene succinate) is not added to the biodegradable film, and further shows that the degradation rate of the material can be accelerated by adding the poly (butylene succinate). The tensile strength and softness of the composite material without PBS were similar to those of example 24, but the hydrostatic pressure of the material was reduced, indicating that the addition of PBS also had a beneficial effect on the barrier properties of the composite film.
The biodegradation rate of the medical protective clothing material prepared in the comparative example 5 is 80% after 90-day measurement, which shows that when the content of the polybutylene succinate is lower than 5-30 parts by weight, the degradation rate of the material is reduced, the tensile strength and the softness of the material are basically unchanged from those of the material in the example 24, but the hydrostatic pressure of the material in the comparative example 5 is reduced compared with that of the material in the example 24, and further shows that the addition of the polybutylene succinate with a proper proportion has a gain effect on the water vapor barrier property of a biodegradable film.
From comparative examples 6-7 it can be seen that polyglycolic acid, poly (butylene adipate/terephthalate), and poly (butylene succinate) have better degradation, tensile strength, flexibility, and moisture barrier properties at the proper ratios.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A degradable medical protective clothing material is characterized by comprising an outer layer made of a biodegradable film, an inner layer made of all-cotton spunlace and a water-soluble adhesive positioned between the inner layer and the outer layer;
the biodegradable film comprises the following components in parts by weight:
10-40 parts of polyglycolic acid, 30-70 parts of poly adipic acid/butylene terephthalate and 5-30 parts of poly butylene succinate.
2. The medical protective clothing material according to claim 1, wherein the biodegradable film comprises the following components in parts by weight:
15-35 parts of polyglycolic acid, 40-65 parts of poly adipic acid/butylene terephthalate and 7.5-25 parts of poly butylene succinate.
3. The medical protective clothing material according to claim 1, wherein the biodegradable film has a grammage of 12 to 60g/m2。
4. The material for medical protective clothing as claimed in claim 1, wherein the number average molecular weight of the polybutylene adipate/terephthalate is 60000-70000.
5. The medical protective clothing material according to claim 1, wherein the gram weight of the water-soluble adhesive is 1 to 5g/m2。
6. The medical protective garment material according to claim 1, wherein the biodegradable film is made by casting or blowing.
7. The medical protective garment material as claimed in claim 1, wherein the medical protective garment material is made by one of a doctor blade, a screen roll transfer and a spray.
8. A method for preparing a material for medical protective clothing as claimed in any one of claims 1 to 7, comprising the steps of:
1) drying polyglycolic acid, poly (butylene adipate/terephthalate) and poly (butylene succinate) according to the proportion, adding into an extruder for melt extrusion, and blowing for molding to obtain a biodegradable film;
2) the biodegradable film and the all-cotton spunlace are compounded at high speed, and the coating weight is 1-5 g/m2The water-soluble adhesive is used for preparing the material of the medical protective clothing.
9. The method according to claim 8, wherein in the step 2), the compounding speed is 40 to 250m/min and the compounding pressure is 0.1 to 0.3 MPa.
10. Use of the material for medical protective clothing according to any one of claims 1 to 7 in medical applications.
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