CN112793250A - Multilayer co-extrusion biodegradable breathable film, preparation method thereof and sanitary towel - Google Patents

Multilayer co-extrusion biodegradable breathable film, preparation method thereof and sanitary towel Download PDF

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Publication number
CN112793250A
CN112793250A CN202011626492.7A CN202011626492A CN112793250A CN 112793250 A CN112793250 A CN 112793250A CN 202011626492 A CN202011626492 A CN 202011626492A CN 112793250 A CN112793250 A CN 112793250A
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layer
extrusion
breathable film
multilayer
resin material
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刘文艺
岳宇
蹇刚
岳净夫
李建平
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Chongqing Hetai Runjia Co ltd
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Chongqing Hetai Runjia Co ltd
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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
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • 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
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • 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
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • 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
    • 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
    • C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
    • 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
    • C08J2467/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate

Abstract

The invention provides a multilayer co-extrusion biodegradable breathable film which comprises a first layer containing 32-3 mass percent8 parts of PBAT, 52-58 parts of CaCO3And 8-12 parts of PLA; a second layer containing 18-22 parts of PBAT and 52-58 parts of CaCO3And 22-28 parts of PLA; the third layer contains 34-36 parts of PBAT and 54-56 parts of CaCO3And 9-11 parts of PLA; wherein the first layer and the third layer both further contain 1-1.5 parts of titanium dioxide. The multilayer co-extrusion biodegradable breathable film provided by the invention is environment-friendly, and can be degraded by microorganisms in the environment after being used and discarded. The invention also provides a preparation method of the multilayer co-extrusion biodegradable breathable film, and also provides a sanitary towel containing the multilayer co-extrusion biodegradable breathable film.

Description

Multilayer co-extrusion biodegradable breathable film, preparation method thereof and sanitary towel
Technical Field
The invention relates to the technical field of breathable films and preparation thereof, in particular to a multilayer co-extrusion biodegradable breathable film, a preparation method thereof and a sanitary towel.
Background
The breathable film has wide application and can be applied to the fields of medicine and health, food packaging, agriculture and the like. The breathable film in the prior art is generally processed by adopting a multilayer co-extrusion process, but the adopted raw materials are mostly non-degradable materials, and the breathable film can stably exist in the environment for a long time after being used and discarded, so that the breathable film has great influence on the environment, namely white pollution.
In the raw materials of the breathable film, PLA (polylactic acid) has good biodegradability, can be completely degraded by microorganisms in the nature under specific conditions after being used, finally generates carbon dioxide and water, does not pollute the environment, and is a well-known environment-friendly material;
PBAT is a copolymer of butanediol adipate and butanediol terephthalate, has the characteristics of PBA (butanediol adipate) and PBT (butanediol terephthalate), and has better ductility and elongation at break as well as better heat resistance and impact performance; it has excellent biodegradability, and is one of the best degradable materials in the market.
The application aims to use PLA and PBAT as raw materials, and provides a multilayer co-extrusion biodegradable breathable film capable of being degraded by environmental microorganisms.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a multilayer co-extrusion biodegradable breathable film, which solves the problem that the multilayer co-extrusion biodegradable breathable film in the prior art is not degraded by environmental microorganisms.
According to an embodiment of the invention, a multilayer co-extruded biodegradable breathable film comprises, by mass
The first layer contains 32-38 parts of PBAT and 52-58 parts of CaCO3And 8-12 parts of PLA;
a second layer containing 18-22 parts of PBAT and 52-58 parts of CaCO3And 22-28 parts of PLA;
the third layer contains 34-36 parts of PBAT and 54-56 parts of CaCO3And 9-11 parts of PLA; wherein the first layer and the third layer both further contain 1-1.5 parts of titanium dioxide.
Further, the second layer also contains 0.8-1 part of titanium dioxide.
According to an embodiment of the invention, the preparation method of the multilayer co-extrusion biodegradable breathable film comprises the following steps:
s1, respectively blending the PBAT and the PLA in the first layer, the second layer and the third layer, then carrying out screw extrusion, and respectively adding CaCO3Respectively shearing the powder at high speed to obtain a first layer of resultant, a second layer of resultant and a third layer of resultant;
s2, adding titanium dioxide into the first-layer resultant, the second-layer resultant and the third-layer resultant in the step S1 respectively, and then performing high-speed shearing to obtain a first co-extrusion material, a second co-extrusion material and a third co-extrusion material respectively;
s3, respectively carrying out screw extrusion on the first co-extrusion material, the second co-extrusion material and the third co-extrusion material in the S2, and then respectively carrying out bracing, cooling and cutting to obtain an upper layer resin material, a middle layer resin material and a lower layer resin material;
s4, blowing the middle-upper layer resin material, the middle-layer resin material and the lower layer resin material of S3 through an ABA type three-layer co-extrusion film blowing machine to form a multi-layer co-extrusion biodegradable breathable film with the upper layer being the upper layer resin material, the middle layer being the middle layer resin material and the lower layer being the lower layer resin material.
Further, the screw extrusion in the S1 is double-screw extrusion, the temperature is 150-170 ℃, the screw rotation speed is 360-380 r/min, and the demolding pressure is 5-8 Mpa.
Further, the high-speed shearing rotating speed of the first layer of resultant and the third layer of resultant in the S2 is 5000-8000 r/min, and the shearing time is 10-15 min; the high-speed shearing rotating speed of the second layer of the obtained product is 8000-12000 r/min, and the shearing time is 10-15 min.
Further, the screw extrusion in the S3 is double-screw extrusion, the temperature is 130-150 ℃, the screw rotation speed is 300-350 r/min, and the demolding pressure is 4-6 Mpa.
Furthermore, in S3, the thickness of the upper layer and the lower layer is 0.005-0.008 mm, and the thickness of the middle layer is 0.02-0.023 mm.
Further, the gram weight of the multilayer co-extruded biodegradable breathable film is 30g/m2。
There is also provided, in accordance with an embodiment of the present invention, a sanitary napkin comprising the multi-layer co-extruded biodegradable breathable film described above.
Further, the multilayer co-extruded biodegradable breathable film is a sanitary towel basement film.
Compared with the prior art, the invention has the following beneficial effects:
the multilayer co-extrusion biodegradable breathable film can be degraded by environmental microorganisms, and can be widely applied to the fields of mattresses, operation pads, protective clothing, food outer packages, flexible packages and the like;
the gram weight of the product is 30g/m2The multi-layer co-extrusion biodegradable breathable film has the film thickness of about 0.03mm, can be rapidly degraded after being discarded when being used as a sanitary towel, thereby releasing the content, accelerating the degradation of the content and avoiding the environmental pollution.
Detailed Description
The technical solution of the present invention is further illustrated by the following examples.
Example 1
A multilayer co-extrusion biodegradable breathable film is processed by the following preparation method, and the preparation method specifically comprises the following steps:
mixing 320g of PBAT and 80g of PLA, adding the mixture into a double-screw extruder for screw extrusion, wherein the temperature is 150 ℃, the screw rotation speed is 360r/min, the demolding pressure is 5Mpa, and then adding 520g of CaCO3Adding the powder into a high-speed shearing machine at 5000r/min, shearing for 15min to obtain the first layer of the product, continuously adding 10g of titanium dioxide, and addingContinuously shearing for 15min at 5000r/min by using a quick shearing machine to obtain a first co-extruded material;
180g of PBAT and 220g of PLA are blended and then added into a double-screw extruder for screw extrusion, wherein the temperature is 160 ℃, the screw rotation speed is 360r/min, the mold stripping pressure is 5Mpa, and then 520g of CaCO is added3Adding the powder into a high-speed shearing machine for shearing for 15min at 8000r/min to obtain a second-layer product, continuously adding 8g of titanium dioxide, then adding into the high-speed shearing machine for shearing for 15min at 8000r/min to obtain a second co-extruded material;
mixing 340g of PBAT and 90g of PLA, adding the mixture into a double-screw extruder for screw extrusion, wherein the temperature is 150 ℃, the screw rotation speed is 360r/min, the demolding pressure is 5Mpa, and then adding 540g of CaCO3Adding the powder into a high-speed shearing machine for shearing for 15min at 5000r/min to obtain a third layer of obtained material, continuously adding 10g of titanium dioxide, then adding the titanium dioxide into the high-speed shearing machine for shearing at 5000r/min for 15min to obtain a third co-extruded material;
respectively adding the first co-extrusion material, the second co-extrusion material and the third co-extrusion material into a double-screw extruder for screw extrusion, wherein the temperature is 130 ℃, the screw rotation speed is 300r/min, the mold stripping pressure is 4Mpa, and then respectively carrying out bracing, cooling and cutting to obtain an upper layer resin material, a middle layer resin material and a lower layer resin material; (ii) a
Finally, the upper layer resin material, the middle layer resin material and the lower layer resin material are blown by an ABA type three-layer co-extrusion film blowing machine to form the upper layer resin material, the middle layer resin material and the lower layer resin material with the gram weight of 30g/m2The multilayer co-extrusion biodegradable breathable film has an upper layer with a thickness of 0.006, a lower layer with a thickness of 0.005mm and a middle layer with a thickness of 0.02 mm.
Example 2
A multilayer co-extrusion biodegradable breathable film is processed by the following preparation method, and the preparation method specifically comprises the following steps:
mixing 340g of PBAT and 90g of PLA, adding the mixture into a double-screw extruder for screw extrusion, wherein the temperature is 160 ℃, the screw rotation speed is 370r/min, the demolding pressure is 6.5Mpa, and then adding 540g of CaCO3Adding the powder into high speed shearing machine at 6500r/min, shearing for 13min to obtain the first layer of the product, and furtherContinuously adding 12g of titanium dioxide, then adding the titanium dioxide into a high-speed shearing machine, and continuously shearing for 13min at 6500r/min to obtain a first co-extruded material;
200g of PBAT and 250g of PLA are blended and then added into a double-screw extruder for screw extrusion, wherein the temperature is 160 ℃, the screw rotation speed is 370r/min, the mold stripping pressure is 6.5Mpa, and then 550g of CaCO is added3Adding the powder into a high-speed shearing machine at 10000r/min, shearing for 13min to obtain a second-layer obtained substance, continuously adding 9g of titanium dioxide, then adding the titanium dioxide into the high-speed shearing machine at 10000r/min, and continuously shearing for 13min to obtain a second co-extruded material;
blending 350g of PBAT and 100g of PLA, adding the mixture into a double-screw extruder for screw extrusion, wherein the temperature is 160 ℃, the screw rotation speed is 370r/min, the mold stripping pressure is 6.5Mpa, and then adding 550g of CaCO3Adding the powder into a high-speed shearing machine for shearing for 13min at 6500r/min to obtain a third layer of obtained material, continuously adding 12g of titanium dioxide, then adding the titanium dioxide into the high-speed shearing machine for shearing for 13min at 6500r/min to obtain a third co-extruded material;
respectively adding the first co-extrusion material, the second co-extrusion material and the third co-extrusion material into a double-screw extruder for screw extrusion, wherein the temperature is 140 ℃, the screw rotation speed is 330r/min, the mold stripping pressure is 5Mpa, and then respectively carrying out bracing, cooling and cutting to obtain an upper layer resin material, a middle layer resin material and a lower layer resin material; (ii) a
Finally, the upper layer resin material, the middle layer resin material and the lower layer resin material are blown by an ABA type three-layer co-extrusion film blowing machine to form the upper layer resin material, the middle layer resin material and the lower layer resin material with the gram weight of 30g/m2The multilayer co-extrusion biodegradable breathable film has an upper layer with a thickness of 0.005 and a lower layer with a thickness of 0.007mm, and a middle layer with a thickness of 0.021 mm.
Example 3
A multilayer co-extrusion biodegradable breathable film is processed by the following preparation method, and the preparation method specifically comprises the following steps:
blending 350g of PBAT and 100g of PLA, adding the mixture into a double-screw extruder for screw extrusion, wherein the temperature is 160 ℃, the screw rotation speed is 370r/min, the mold stripping pressure is 6.5Mpa, and then adding 550g of CaCO3Adding the powder into a high-speed shearing machine at 6500r/min, shearing for 13min to obtain a first layer of obtained material, continuously adding 12g of titanium dioxide, then adding into a high-speed shearing machine at 6500r/min, and continuously shearing for 13min to obtain a first co-extruded material;
200g of PBAT and 250g of PLA are blended and then added into a double-screw extruder for screw extrusion, wherein the temperature is 160 ℃, the screw rotation speed is 370r/min, the mold stripping pressure is 6.5Mpa, and then 550g of CaCO is added3Adding the powder into a high-speed shearing machine at 10000r/min, shearing for 13min to obtain a second-layer obtained substance, continuously adding 9g of titanium dioxide, then adding the titanium dioxide into the high-speed shearing machine at 10000r/min, and continuously shearing for 13min to obtain a second co-extruded material;
blending 350g of PBAT and 100g of PLA, adding the mixture into a double-screw extruder for screw extrusion, wherein the temperature is 160 ℃, the screw rotation speed is 370r/min, the mold stripping pressure is 6.5Mpa, and then adding 550g of CaCO3Adding the powder into a high-speed shearing machine for shearing for 13min at 6500r/min to obtain a third layer of obtained material, continuously adding 12g of titanium dioxide, then adding the titanium dioxide into the high-speed shearing machine for shearing for 13min at 6500r/min to obtain a third co-extruded material;
respectively adding the first co-extrusion material, the second co-extrusion material and the third co-extrusion material into a double-screw extruder for screw extrusion, wherein the temperature is 140 ℃, the screw rotation speed is 330r/min, the mold stripping pressure is 5Mpa, and then respectively carrying out bracing, cooling and cutting to obtain an upper layer resin material, a middle layer resin material and a lower layer resin material; (ii) a
Finally, the upper layer resin material, the middle layer resin material and the lower layer resin material are blown by an ABA type three-layer co-extrusion film blowing machine to form the upper layer resin material, the middle layer resin material and the lower layer resin material with the gram weight of 30g/m2The multilayer co-extrusion biodegradable breathable film has an upper layer with a thickness of 0.008mm, a lower layer with a thickness of 0.005mm and a middle layer with a thickness of 0.022 mm.
Example 4
A multilayer co-extrusion biodegradable breathable film is processed by the following preparation method, and the preparation method specifically comprises the following steps:
blending 360g of PBAT and 110g of PLA, adding the mixture into a double-screw extruder for screw extrusion, wherein the temperature is 170 ℃, the screw rotation speed is 380r/min, the die-stripping pressure is 8Mpa, and then adding 560g of CaCO3Adding the powder into a high-speed shearing machine for shearing for 10min at 8000r/min to obtain a first layer of obtained material, continuously adding 15g of titanium dioxide, then adding into the high-speed shearing machine for shearing for 10min at 8000r/min to obtain a first co-extruded material;
220g of PBAT and 280g of PLA are blended and then added into a double-screw extruder for screw extrusion, wherein the temperature is 170 ℃, the screw rotation speed is 380r/min, the mold stripping pressure is 8Mpa, and then 580g of CaCO is added3Adding the powder into a high-speed shearing machine for shearing at 12000r/min for 10min to obtain a second-layer product, continuously adding 10g of titanium dioxide, then adding into the high-speed shearing machine for shearing at 12000r/min for 10min to obtain a second co-extruded material;
blending 360g of PBAT and 110g of PLA, adding the mixture into a double-screw extruder for screw extrusion, wherein the temperature is 170 ℃, the screw rotation speed is 380r/min, the die-stripping pressure is 8Mpa, and then adding 560g of CaCO3Adding the powder into a high-speed shearing machine for shearing for 10min at 8000r/min to obtain a third layer of product, continuously adding 15g of titanium dioxide, then adding into the high-speed shearing machine for shearing for 10min at 8000r/min to obtain a third co-extruded material;
respectively adding the first co-extrusion material, the second co-extrusion material and the third co-extrusion material into a double-screw extruder for screw extrusion, wherein the temperature is 150 ℃, the screw rotation speed is 350r/min, the mold stripping pressure is 6Mpa, and then respectively carrying out bracing, cooling and cutting to obtain an upper layer resin material, a middle layer resin material and a lower layer resin material; (ii) a
Finally, the upper layer resin material, the middle layer resin material and the lower layer resin material are blown by an ABA type three-layer co-extrusion film blowing machine to form the upper layer resin material, the middle layer resin material and the lower layer resin material with the gram weight of 30g/m2The multilayer co-extrusion biodegradable breathable film has an upper layer with a thickness of 0.007mm, a lower layer with a thickness of 0.008mm and a middle layer with a thickness of 0.023 mm.
Example 5
A multilayer co-extrusion biodegradable breathable film is processed by the following preparation method, and the preparation method specifically comprises the following steps:
380g of PBAT and 120g of PLA are blended and then added into a double-screw extruder for screw extrusion, wherein the temperature is 170 ℃, the rotating speed of the screw is 380r/min, and the pressure of the die stripping isAt 8MPa, 580g of CaCO were then added3Adding the powder into a high-speed shearing machine for shearing for 10min at 8000r/min to obtain a first layer of obtained material, continuously adding 15g of titanium dioxide, then adding into the high-speed shearing machine for shearing for 10min at 8000r/min to obtain a first co-extruded material;
220g of PBAT and 280g of PLA are blended and then added into a double-screw extruder for screw extrusion, wherein the temperature is 170 ℃, the screw rotation speed is 380r/min, the mold stripping pressure is 8Mpa, and then 580g of CaCO is added3Adding the powder into a high-speed shearing machine for shearing at 12000r/min for 10min to obtain a second-layer product, continuously adding 10g of titanium dioxide, then adding into the high-speed shearing machine for shearing at 12000r/min for 10min to obtain a second co-extruded material;
blending 360g of PBAT and 110g of PLA, adding the mixture into a double-screw extruder for screw extrusion, wherein the temperature is 170 ℃, the screw rotation speed is 380r/min, the die-stripping pressure is 8Mpa, and then adding 560g of CaCO3Adding the powder into a high-speed shearing machine for shearing for 10min at 8000r/min to obtain a third layer of product, continuously adding 15g of titanium dioxide, then adding into the high-speed shearing machine for shearing for 10min at 8000r/min to obtain a third co-extruded material;
respectively adding the first co-extrusion material, the second co-extrusion material and the third co-extrusion material into a double-screw extruder for screw extrusion, wherein the temperature is 150 ℃, the screw rotation speed is 350r/min, the mold stripping pressure is 6Mpa, and then respectively carrying out bracing, cooling and cutting to obtain an upper layer resin material, a middle layer resin material and a lower layer resin material; (ii) a
Finally, the upper layer resin material, the middle layer resin material and the lower layer resin material are blown by an ABA type three-layer co-extrusion film blowing machine to form the upper layer resin material, the middle layer resin material and the lower layer resin material with the gram weight of 30g/m2The multilayer co-extrusion biodegradable breathable film has an upper layer with a thickness of 0.007mm, a lower layer with a thickness of 0.008mm and a middle layer with a thickness of 0.02 mm.
Example 6
The same as example 3, except for the following, specifically different,
the titanium dioxide added to the first co-extrusion material is 0.
Example 7
The same as example 3, except for the following, specifically different,
the titanium dioxide added in the second co-extrusion material is 0.
Example 8
The same as example 3, except for the following, specifically different,
the titanium dioxide added in the third co-extrusion material is 0.
Example 9
The same as example 3, except for the following, specifically different,
the titanium dioxide added in the first co-extrusion material and the third co-extrusion material is 0.
Example 10
The same as example 3, except for the following, specifically different,
the titanium dioxide added in the first co-extrusion material and the second co-extrusion material is 0.
Example 11
The same as example 3, except for the following, specifically different,
the titanium dioxide added in the second co-extrusion material and the third co-extrusion material is 0.
Example 12
Provides a sanitary napkin, the gram weight of which prepared by the preparation method in the above examples 1-11 is 30g/m2The multilayer co-extrusion biodegradable breathable film is used as a bottom film of the sanitary towel.
30g/m prepared in the above examples 1 to 112The multilayer co-extruded biodegradable breathable film is used for testing, and the test results are shown in the following table:
Figure BDA0002874986610000071
Figure BDA0002874986610000081
the gram weight of the multilayer co-extruded biodegradable breathable film in the embodiment is 30g/m2Left and right, explain the principlesThe change of the number has little influence on the gram weight; wherein, the multilayer co-extrusion biodegradable breathable films provided in 1-5 and embodiment 7 are relatively uniform in strength index, wherein the first co-extrusion material and the third co-extrusion material in embodiment 4 have the same formula and process conditions, and each index is also at a higher level, which indicates that when the first layer and the third layer have the same formula and the same process, the obtained multilayer co-extrusion biodegradable breathable film has better quality;
the comparison of the examples 6 to 11 shows that the quality of the multilayer co-extruded biodegradable breathable film cannot be affected only when the second layer does not contain titanium dioxide, namely, the titanium dioxide is added to the first layer, the pair of the second layer and the third layer or the pair of the first layer and the third layer, and has a positive effect on quality improvement.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (10)

1. A multi-layer co-extrusion biodegradable breathable film is characterized by comprising
The first layer contains 32-38 parts of PBAT and 52-58 parts of CaCO3And 8-12 parts of PLA;
a second layer containing 18-22 parts of PBAT and 52-58 parts of CaCO3And 22-28 parts of PLA;
the third layer contains 34-36 parts of PBAT and 54-56 parts of CaCO3And 9-11 parts of PLA; wherein the first layer and the third layer both further contain 1-1.5 parts of titanium dioxide.
2. The multilayer co-extrusion biodegradable breathable film according to claim 1, wherein the second layer further comprises 0.8-1 part of titanium dioxide.
3. A method of making a multilayer coextruded biodegradable breathable film according to claim 2, comprising the steps of:
s1, respectively blending the PBAT and the PLA in the first layer, the second layer and the third layer, then carrying out screw extrusion, and respectively adding CaCO3Respectively shearing the powder at high speed to obtain a first layer of resultant, a second layer of resultant and a third layer of resultant;
s2, adding titanium dioxide into the first-layer resultant, the second-layer resultant and the third-layer resultant in the step S1 respectively, and then performing high-speed shearing to obtain a first co-extrusion material, a second co-extrusion material and a third co-extrusion material respectively;
s3, respectively carrying out screw extrusion on the first co-extrusion material, the second co-extrusion material and the third co-extrusion material in the S2, and then respectively carrying out bracing, cooling and cutting to obtain an upper layer resin material, a middle layer resin material and a lower layer resin material;
s4, blowing the middle-upper layer resin material, the middle-layer resin material and the lower layer resin material of S3 through an ABA type three-layer co-extrusion film blowing machine to form a multi-layer co-extrusion biodegradable breathable film with the upper layer being the upper layer resin material, the middle layer being the middle layer resin material and the lower layer being the lower layer resin material.
4. The preparation method of the multilayer co-extrusion biodegradable breathable film according to claim 3, wherein the screw extrusion in S1 is twin-screw extrusion, the temperature is 150-170 ℃, the screw rotation speed is 360-380 r/min, and the demolding pressure is 5-8 MPa.
5. The preparation method of the multilayer co-extrusion biodegradable breathable film according to claim 3, wherein the high-speed shearing rotation speed of the first layer resultant and the third layer resultant in S2 is 5000-8000 r/min, and the shearing time is 10-15 min; the high-speed shearing rotating speed of the second layer of the obtained product is 8000-12000 r/min, and the shearing time is 10-15 min.
6. The preparation method of the multilayer co-extrusion biodegradable breathable film according to claim 3, wherein the screw extrusion in S3 is twin-screw extrusion, the temperature is 130-150 ℃, the screw rotation speed is 300-350 r/min, and the demolding pressure is 4-6 MPa.
7. The method for preparing a multilayer co-extrusion biodegradable breathable film according to claim 3, wherein in S3, the thicknesses of the upper layer and the lower layer are both 0.005-0.008 mm, and the thickness of the middle layer is 0.02-0.023 mm.
8. The method of claim 3, wherein the multilayer coextruded biodegradable breathable film has a grammage of 30g/m2。
9. A sanitary napkin comprising the multilayer co-extruded biodegradable breathable film of claim 1.
10. The sanitary napkin as claimed in claim 9, wherein said multi-layer co-extruded biodegradable breathable film is a base film of the sanitary napkin.
CN202011626492.7A 2020-12-30 2020-12-30 Multilayer co-extrusion biodegradable breathable film, preparation method thereof and sanitary towel Pending CN112793250A (en)

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Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1290208A (en) * 1997-12-31 2001-04-04 金伯利-克拉克环球有限公司 Method for making water degradable polymer microlayer film
CN1365378A (en) * 1999-07-28 2002-08-21 陶氏化学公司 Hydrogenated block polymers having elasticity and articles made therefrom
US20050208294A1 (en) * 2004-03-19 2005-09-22 Kimberly-Clark Worldwide, Inc. Absorbent articles having an aliphatic-aromatic copolyester film
US20060036222A1 (en) * 2004-08-10 2006-02-16 Kimberly-Clark Worldwide, Inc. Absorbent articles comprising a bodily exudate modifying agent and a skin care formulation
CN103087488A (en) * 2013-01-31 2013-05-08 金发科技股份有限公司 Biodegradable polylactic acid composite material, and preparation method and application thereof
CN103747955A (en) * 2011-06-23 2014-04-23 纤维网公司 Vapor permeable, substantially water impermeable multilayer article
CN104002527A (en) * 2014-04-30 2014-08-27 杭州可靠护理用品股份有限公司 Portable nursing pad containing polylactic acid fiber and preparation method thereof
CN105683288A (en) * 2013-10-23 2016-06-15 东丽先端材料研究开发（中国）有限公司 Microporous polylactic acid oriented film and uses thereof
CN106084675A (en) * 2016-06-06 2016-11-09 山东天野生物降解新材料科技有限公司 A kind of whole life cycle design being beneficial to soil moisture conservation and preparation method thereof
CN107031153A (en) * 2017-03-30 2017-08-11 齐庆德 A kind of biodegradable multi-layer co-extruded material and preparation method
CN108690333A (en) * 2018-04-09 2018-10-23 南通华盛高聚物科技股份有限公司 A kind of biodegradable mulch of high-barrier and preparation method thereof
CN109082086A (en) * 2018-07-12 2018-12-25 安徽聚美生物科技有限公司 A kind of preparation method of the high ventilated membrane of polylactic acid
CN109229812A (en) * 2018-09-06 2019-01-18 吉林中粮生化有限公司 A kind of three-layer co-extruded complete biodegradable express packaging bag and preparation method thereof
CN209171042U (en) * 2018-08-22 2019-07-30 四川辉恒再生资源回收利用有限公司 A kind of agricultural degradable films
CN210185855U (en) * 2018-10-29 2020-03-27 杭州川田卫生用品有限公司 Degradable sanitary towel

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1290208A (en) * 1997-12-31 2001-04-04 金伯利-克拉克环球有限公司 Method for making water degradable polymer microlayer film
CN1365378A (en) * 1999-07-28 2002-08-21 陶氏化学公司 Hydrogenated block polymers having elasticity and articles made therefrom
US20050208294A1 (en) * 2004-03-19 2005-09-22 Kimberly-Clark Worldwide, Inc. Absorbent articles having an aliphatic-aromatic copolyester film
US20060036222A1 (en) * 2004-08-10 2006-02-16 Kimberly-Clark Worldwide, Inc. Absorbent articles comprising a bodily exudate modifying agent and a skin care formulation
CN103747955A (en) * 2011-06-23 2014-04-23 纤维网公司 Vapor permeable, substantially water impermeable multilayer article
CN103087488A (en) * 2013-01-31 2013-05-08 金发科技股份有限公司 Biodegradable polylactic acid composite material, and preparation method and application thereof
CN105683288A (en) * 2013-10-23 2016-06-15 东丽先端材料研究开发（中国）有限公司 Microporous polylactic acid oriented film and uses thereof
CN104002527A (en) * 2014-04-30 2014-08-27 杭州可靠护理用品股份有限公司 Portable nursing pad containing polylactic acid fiber and preparation method thereof
CN106084675A (en) * 2016-06-06 2016-11-09 山东天野生物降解新材料科技有限公司 A kind of whole life cycle design being beneficial to soil moisture conservation and preparation method thereof
CN107031153A (en) * 2017-03-30 2017-08-11 齐庆德 A kind of biodegradable multi-layer co-extruded material and preparation method
CN108690333A (en) * 2018-04-09 2018-10-23 南通华盛高聚物科技股份有限公司 A kind of biodegradable mulch of high-barrier and preparation method thereof
CN109082086A (en) * 2018-07-12 2018-12-25 安徽聚美生物科技有限公司 A kind of preparation method of the high ventilated membrane of polylactic acid
CN209171042U (en) * 2018-08-22 2019-07-30 四川辉恒再生资源回收利用有限公司 A kind of agricultural degradable films
CN109229812A (en) * 2018-09-06 2019-01-18 吉林中粮生化有限公司 A kind of three-layer co-extruded complete biodegradable express packaging bag and preparation method thereof
CN210185855U (en) * 2018-10-29 2020-03-27 杭州川田卫生用品有限公司 Degradable sanitary towel

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Application publication date: 20210514