CN110181871A - A kind of environment-friendly biodegradable composite soft tube and preparation method thereof - Google Patents
A kind of environment-friendly biodegradable composite soft tube and preparation method thereof Download PDFInfo
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- CN110181871A CN110181871A CN201910377496.7A CN201910377496A CN110181871A CN 110181871 A CN110181871 A CN 110181871A CN 201910377496 A CN201910377496 A CN 201910377496A CN 110181871 A CN110181871 A CN 110181871A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/02—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore of moulding techniques only
-
- 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
- B32B1/00—Layered products having a general shape other than plane
- B32B1/08—Tubular products
-
- 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
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
-
- 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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
-
- 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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
-
- 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
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
-
- 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
- B32B2307/70—Other properties
- B32B2307/716—Degradable
- B32B2307/7163—Biodegradable
-
- 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
- B32B2307/70—Other properties
- B32B2307/752—Corrosion inhibitor
-
- 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
- B32B2439/00—Containers; Receptacles
- B32B2439/40—Closed containers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Abstract
The invention discloses a kind of environment-friendly biodegradable composite soft tubes and preparation method thereof, using polylactic acid film, barrier film, pure biodegradable outer layer of the heat sealing film as composite soft tube pipe shaft, barrier layer, seal internal layer, pure biodegrade outer layer is made of 100% polylactic acid, complete biodegrade itself can be realized in landfill and aerobic environment, and polylactic acid can attract 600 kinds of different microorganisms to consume composite soft tube in biodegradation process, play the first adhesive layer of catalytic degradation, barrier layer, the effect of second adhesive layer and heat-sealing internal layer, so that composite soft tube can be realized complete biodegrade, and catabolite is water, carbon dioxide and biomass, it is completely non-hazardous to environment, it is pollution-free；Therefore, the present invention is while can satisfy the performance requirement of daily use chemicals packaging tube application, additionally it is possible to which the complete biodegrade for realizing whole composite soft tube has the advantages that degradation is at low cost, the feature of environmental protection is good, biodegradation period is short.
Description
Technical field
The present invention relates to a kind of environment-friendly biodegradable composite soft tubes and preparation method thereof.
Background technique
Since the technology of composite soft tube start mainly be used in successively in daily use chemicals packaging the nineties in last century in toothpaste packet
In dress, with the gradually development of technology, since it has bigger advantage in cost and properties of product.
Composite soft tube mainly has aluminum plastic composite pipe and overall plastic multiple tube, and aluminum plastic composite pipe is due to more difficult separation, so returning
Receipts are very difficult, although overall plastic multiple tube can all recycle granulation, cost recovery is also relatively high；And tradition
Polyethylene packaging composite soft tube there is the characteristic of resistance to microorganism, be easy to cause in the environment accumulative extensively to form pollution sources.
So needing a kind of biodegradable composite soft tube, it can be widely used in daily use chemicals packaging, this is compound
The trend of the times of hose.
Summary of the invention
The technical problems to be solved by the present invention are: providing a kind of environment-friendly biodegradable composite soft tube and its preparation side
Method exists to solve existing composite soft tube due to either the difficult either cost recovery of recycling is high or can not degrade and pollute
The poor problem of the feature of environmental protection.
Above-mentioned technical problem is solved, the technical solution adopted in the present invention is as follows:
A kind of environment-friendly biodegradable composite soft tube, it is characterised in that: the pipe of the environment-friendly biodegradable composite soft tube
Body is followed successively by pure biodegradable outer layer, the first adhesive layer, barrier layer, the second adhesive layer and heat-sealing internal layer from outside to inside；It is described pure
Biodegradable outer layer is the polylactic acid film made of polylactic acid, and the barrier layer is the barrier film made of barrier material,
The barrier material is mixed by ethylene-vinyl alcohol copolymer and polylactic acid by 99:1 to the weight ratio between 95:5, described
Sealing internal layer is the heat sealing film made of heat-sealable material, and the heat-sealable material presses 60:40 by metallocene PE and polylactic acid
It is mixed to the weight ratio between 50:50.
As the preferred embodiment of the present invention: first adhesive layer and the second adhesive layer are polyvinyl resin.
Wherein, preferred: the polyvinyl resin is that linea low density maleated polyethylene connects branch.
As the preferred embodiment of the present invention: described between 85 μm to 125 μm of thickness of the pure biodegradable outer layer
The thickness of first adhesive layer is between 25 μm to 35 μm, and for the thickness of the barrier layer between 70 μm to 90 μm, described second is viscous
The thickness of layer is tied between 25 μm to 35 μm, the thickness of the heat-sealing internal layer is between 120 μm to 160 μm
A kind of preparation method of environment-friendly biodegradable composite soft tube, it is characterised in that: the preparation method includes:
Step 1: preparing polylactic acid film:
The polylactic acid film is made by blown film or extrusion process in polylactic acid particle；
Step 2: preparing barrier film:
First by ethylene-vinyl alcohol copolymer particle and polylactic acid particle by 99:1 to the weight ratio heating stirring between 95:5
It is uniformly mixed, barrier material is made；
Again by the barrier material extrusion molding, the barrier film is made；
Step 3: preparing heat sealing film:
First metallocene PE particle and polylactic acid particle are mixed by 60:40 to the weight ratio heating stirring between 50:50
It closes uniformly, heat-sealable material is made；
Again by the heat-sealable material extrusion molding, the heat sealing film is made；
Step 4: compound for the first time:
By extrusion composite technology, the polylactic acid film is bonded together with polyvinyl resin with barrier film, is made
At pipe shaft sheet material semi-finished product；
Step 5: second is compound:
By extrusion composite technology, the pipe shaft sheet material semi-finished product and heat sealing film are bonded in one with polyvinyl resin
It rises, pipe shaft sheet material is made, wherein the heat sealing film is bonded in the barrier of the pipe shaft sheet material semi-finished product by polyvinyl resin
On film；
Step 6: pipe shaft tubulation:
By the pipe shaft sheet material is by docking or overlapped that mode is welded, environment-friendly biodegradable composite soft tube is made
Pipe shaft so that the polylactic acid film, it is compound for the first time used in polyvinyl resin, barrier film, second compound institute
The polyvinyl resin and heat sealing film used respectively as the pure biodegradable outer layer of the pipe shaft, the first adhesive layer, barrier layer,
Second adhesive layer and heat-sealing internal layer.
Preferred: the process that barrier film is prepared described in step 2 is realized by extruder, wherein the ethylene-vinyl alcohol
The heating temperature of copolymer particle and polylactic acid particle during being stirred is between 170 DEG C to 230 DEG C, the barrier material
Expect the pressure of extrusion molding in 4kg between 6kg, the barrier film be extruded after cooling water temperature at 15 DEG C to 30
Between DEG C.
Preferred: the process that heat sealing film is prepared described in step 3 is realized by extruder, wherein the metallocene PE
Between 170 DEG C to 230 DEG C, the heat-sealable material squeezes out the heating temperature of particle and polylactic acid particle during being stirred
Molding pressure in 4kg between 6kg, the heat sealing film be extruded after cooling water temperature 15 DEG C to 30 DEG C it
Between.
Preferred: process compound for the first time described in step 4 is realized by extrusion compounding machine, wherein the extrusion compounding machine
For the first time it is compound in processing conditions are as follows: processing temperature between 220 DEG C to 320 DEG C, unwinding tension 15kg to 25kg it
Between, winding tension is in 20kg between 35kg, and composite pressure is in 4kg between 6kg.
Preferred: second of compound process described in step 5 is realized by extrusion compounding machine, wherein the extrusion compounding machine
Second it is compound in processing conditions are as follows: processing temperature between 220 DEG C to 320 DEG C, unwinding tension 15kg to 25kg it
Between, winding tension is in 20kg between 35kg, and composite pressure is in 4kg between 6kg.
Preferred: the process of pipe shaft tubulation described in step 6 is realized by tuber, wherein the processing conditions of the tuber
Are as follows: high-frequency welding energy is between 30% to 100%, and cooling temperature is between 15 DEG C to 22 DEG C, and pressure is in 2kg between 5kg.
Compared with prior art, the invention has the following advantages:
First, pure biodegradable outer layer of the present invention using polylactic acid film as composite soft tube pipe shaft is suitable for printing
The function of decoration, while also there is enough light shines and resistance to chemical corrosion, and the present invention is used as again using barrier film
The barrier layer for closing hose pipe shaft, with extraordinary barrier property, it can be ensured that the content of composite soft tube pipe shaft is carried out
It guarantees the quality, protect fragrant, moisturizing, the present invention also uses heat-sealing internal layer of the heat sealing film as composite soft tube pipe shaft, with good heat
Sealing property, it can be ensured that the firm and durable of composite soft tube pipe shaft, therefore, environment-friendly biodegradable composite soft tube of the invention can
Meet the performance requirement of daily use chemicals packaging tube application；
Also, above-mentioned pure biodegradable outer layer is made of 100% polylactic acid, itself can be in landfill and aerobic
Environment in realize complete biodegrade, and polylactic acid can attract 600 kinds of different microorganisms in biodegradation process
Composite soft tube is consumed, catalytic degradation the first adhesive layer, barrier layer, the second adhesive layer and heat-sealing internal layer are played the role of, so that
Composite soft tube can be realized complete biodegrade, and catabolite is water, carbon dioxide and biomass, to environment entirely without danger
It is harmful, pollution-free；
Moreover, 1% to 5% and 40% to 50% polylactic acid is also added in above-mentioned barrier layer and heat-sealing internal layer respectively,
Under the premise of not influencing the barrier property of barrier layer and sealing the heat sealability of internal layer, polylactic acid is in aforementioned biological degradation process
The middle polymer molecular chain for generating hydrolysis separation barrier layer and sealing internal layer, this reduces barrier layers and heat-sealing internal layer
Molecular weight contracts significantly so that barrier layer and heat-sealing internal layer are easier to be digested by microbial attack in aforementioned biological degradation process
The short biodegradation period of composite soft tube；Through testing, according to polylactic acid in barrier layer in 1% to 5% adding proportion and heat
Sealing polylactic acid in internal layer, in the difference of 40% to 50% adding proportion, environment-friendly biodegradable composite soft tube of the invention can realize
6~12 months biodegradation periods；
In conclusion the present invention is while can satisfy the performance requirement of daily use chemicals packaging tube application, additionally it is possible to realize
The complete biodegrade of whole composite soft tube has the advantages that degradation is at low cost, the feature of environmental protection is good, biodegradation period is short.
Second, preparation method of the invention, simple process and low cost.
Detailed description of the invention
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments:
Fig. 1 is the schematic cross-sectional view of environment-friendly biodegradable composite soft tube of the invention.
Specific embodiment
Below with reference to embodiment and its attached drawing, the present invention is described in detail, to help those skilled in the art more preferable
Understanding inventive concept of the invention, but the protection scope of the claims in the present invention is not limited to following embodiments, to this field
For technical staff, under the premise of not departing from the inventive concept of the present invention, it is obtained all creative work is not made
Other embodiments belong to protection scope of the present invention.
Embodiment one
As shown in Figure 1, disclosed by the invention is a kind of environment-friendly biodegradable composite soft tube, the environment-friendly biodegradable is multiple
The pipe shaft for closing hose is followed successively by pure biodegradable outer layer 1, the first adhesive layer 2, barrier layer 3, the second adhesive layer 4 and heat from outside to inside
Seal internal layer 5；The pure biodegradable outer layer 1 is the polylactic acid film made of polylactic acid (PLA), and the barrier layer 3 is by hindering
Barrier film made of barrier material, the barrier material press 99:1 by ethylene-vinyl alcohol copolymer (EVOH) and polylactic acid (PLA)
It is mixed to the weight ratio between 95:5, the heat-sealing internal layer 5 is the heat sealing film made of heat-sealable material, the heat-sealing material
Material is mixed by metallocene PE (MLDE) and polylactic acid (PLA) by 60:40 to the weight ratio between 50:50.
Pure biodegradable outer layer 1 of the present invention using polylactic acid film as composite soft tube pipe shaft, is suitable for printed decoration
Function, while also have enough light shines and resistance to chemical corrosion, and the present invention using barrier film as compound soft
The barrier layer 3 of pipe pipe shaft, with extraordinary barrier property, it can be ensured that the content of composite soft tube pipe shaft is protected
Matter protects fragrant, moisturizing, and the present invention also uses heat-sealing internal layer 5 of the heat sealing film as composite soft tube pipe shaft, with good heat-sealing
Performance, it can be ensured that the firm and durable of composite soft tube pipe shaft, therefore, environment-friendly biodegradable composite soft tube of the invention can expire
The performance requirement of sufficient daily use chemicals packaging tube application；
Also, above-mentioned pure biodegradable outer layer 1 is made of 100% polylactic acid, itself in landfill and can have
Complete biodegrade is realized in the environment of oxygen, and polylactic acid can attract 600 kinds of different micro- lifes in biodegradation process
Object consumes composite soft tube, plays the first adhesive layer of catalytic degradation 2, barrier layer 3, second adhesive layer 4 and the work for sealing internal layer 5
With so that composite soft tube can be realized complete biodegrade, and catabolite is water, carbon dioxide and biomass, to environment
It is completely non-hazardous, pollution-free；
Moreover, 1% to 5% and 40% to 50% poly- cream is also added in above-mentioned barrier layer 3 and heat-sealing internal layer 5 respectively
Acid, under the premise of not influencing the barrier property of barrier layer 3 and sealing the heat sealability of internal layer 5, polylactic acid is dropped in aforementioned biological
Hydrolysis separation barrier layer 3 is generated in solution preocess and seals the polymer molecular chain of internal layer 5, and this reduces 3 Hes of barrier layer
The molecular weight of internal layer 5 is sealed, so that barrier layer 3 and heat-sealing internal layer 5 are easier to be invaded by microorganism in aforementioned biological degradation process
Erosion digestion, substantially reduces the biodegradation period of composite soft tube；Through testing, according to polylactic acid in barrier layer 3 1% to 5%
Adding proportion and heat-sealing internal layer 5 in polylactic acid 40% to 50% adding proportion difference, environmental protection of the invention can biology drop
Solution composite soft tube can realize 6~12 months biodegradation periods；
In conclusion the present invention is while can satisfy the performance requirement of daily use chemicals packaging tube application, additionally it is possible to realize
The complete biodegrade of whole composite soft tube has the advantages that degradation is at low cost, the feature of environmental protection is good, biodegradation period is short.
The above are basic embodiment of the invention, can be done on the basis of the basic embodiment further excellent
Change, improve and limit:
As the preferred embodiment of the present invention: first adhesive layer 2 and the second adhesive layer 4 are polyvinyl resin,
First adhesive layer 2 realizes the bonding of the biodegradable outer layer 1 and barrier layer 3, second adhesive layer 4 by thermal welding
The bonding of the barrier layer 3 with heat-sealing internal layer 5 is realized by thermal welding.
Wherein, preferred: the polyvinyl resin is that linea low density maleated polyethylene connects branch.
As the preferred embodiment of the present invention: between 85 μm to 125 μm of thickness of the pure biodegradable outer layer 1, institute
The thickness of the first adhesive layer 2 is stated between 25 μm to 35 μm, the thickness of the barrier layer 3 is between 70 μm to 90 μm, and described
The thickness of two adhesive layers 4 is between 25 μm to 35 μm, and the thickness of the heat-sealing internal layer 5 is between 120 μm to 160 μm
Embodiment two
The invention also discloses the preparation methods of environment-friendly biodegradable composite soft tube described in above-described embodiment one, comprising:
Step 1: preparing polylactic acid film:
The polylactic acid film is made by blown film or extrusion process in polylactic acid particle (PLA).
Step 2: preparing barrier film:
First by ethylene-vinyl alcohol copolymer particle (EVOH) and polylactic acid particle (PLA) by 99:1 to the weight between 95:5
Amount is uniformly mixed than heating stirring, and barrier material is made；
Again by the barrier material extrusion molding, the barrier film is made.
Preferred: the process that barrier film is prepared described in step 2 is realized by extruder, wherein the ethylene-vinyl alcohol
The heating temperature of copolymer particle and polylactic acid particle during being stirred is between 170 DEG C to 230 DEG C, the barrier material
Expect the pressure of extrusion molding in 4kg between 6kg, the barrier film be extruded after cooling water temperature at 15 DEG C to 30
Between DEG C.
Step 3: preparing heat sealing film:
First by metallocene PE particle (MLDE) and polylactic acid particle (PLA) by 60:40 to the weight ratio between 50:50
Heating stirring is uniformly mixed, and heat-sealable material is made；
Again by the heat-sealable material extrusion molding, the heat sealing film is made.
Preferred: the process that heat sealing film is prepared described in step 3 is realized by extruder, wherein the metallocene PE
Between 170 DEG C to 230 DEG C, the heat-sealable material squeezes out the heating temperature of particle and polylactic acid particle during being stirred
Molding pressure in 4kg between 6kg, the heat sealing film be extruded after cooling water temperature 15 DEG C to 30 DEG C it
Between.
Step 4: compound for the first time:
By extrusion composite technology, the polylactic acid film is bonded together with polyvinyl resin with barrier film, is made
At pipe shaft sheet material semi-finished product.
Preferred: process compound for the first time described in step 4 is realized by extrusion compounding machine, wherein the extrusion compounding machine
For the first time it is compound in processing conditions are as follows: processing temperature between 220 DEG C to 320 DEG C, unwinding tension 15kg to 25kg it
Between, winding tension is in 20kg between 35kg, and composite pressure is in 4kg between 6kg.
Step 5: second is compound:
By extrusion composite technology, the pipe shaft sheet material semi-finished product and heat sealing film are bonded in one with polyvinyl resin
It rises, pipe shaft sheet material is made, wherein the heat sealing film is bonded in the barrier of the pipe shaft sheet material semi-finished product by polyvinyl resin
On film.
Preferred: second of compound process described in step 5 is realized by extrusion compounding machine, wherein the extrusion compounding machine
Second it is compound in processing conditions are as follows: processing temperature between 220 DEG C to 320 DEG C, unwinding tension 15kg to 25kg it
Between, winding tension is in 20kg between 35kg, and composite pressure is in 4kg between 6kg.
Step 6: pipe shaft tubulation:
By the pipe shaft sheet material is by docking or overlapped that mode is welded, environment-friendly biodegradable composite soft tube is made
Pipe shaft so that the polylactic acid film, it is compound for the first time used in polyvinyl resin, barrier film, second compound institute
Pure biodegradable outer layer 1, first adhesive layer 2, barrier of the polyvinyl resin and heat sealing film used respectively as the pipe shaft
The 3, second adhesive layer 4 of layer and heat-sealing internal layer 5.
Preferred: the process of pipe shaft tubulation described in step 6 is realized by tuber, wherein the processing conditions of the tuber
Are as follows: high-frequency welding energy is between 30% to 100%, and cooling temperature is between 15 DEG C to 22 DEG C, and pressure is in 2kg between 5kg.
Step 7: pipe shoulder is molded:
The environment-friendly biodegradable composite soft tube is made in the injection molding tube shoulder on the pipe shaft.
It is preferred: the processing conditions of the injection molding of pipe shoulder described in step 7 are as follows: injection temperature is between 200 DEG C to 260 DEG C, pressure
In 20bar between 50bar, cooling temperature is between 10 DEG C to 20 DEG C.
In addition:
The present invention passes through 13432 standard of ISO 1485 and EN to the selection of polylactic acid (PLA).
Finished product is made in environment-friendly biodegradable composite soft tube of the invention, by test, is carried out pair with common multiple tube
Than the data of 10 samples are as follows
By the correlation data of upper table it is found that the performance of environment-friendly biodegradable composite soft tube of the invention is entirely capable of reaching makes
With requiring.
The present invention is not limited to above-mentioned specific embodiment, according to above content, according to the ordinary technical knowledge of this field
And customary means, under the premise of not departing from above-mentioned basic fundamental thought of the invention, the present invention can also make other diversified forms
Equivalent modifications, replacement or change, all fall among protection scope of the present invention.
Claims (10)
1. a kind of environment-friendly biodegradable composite soft tube, it is characterised in that: the pipe shaft of the environment-friendly biodegradable composite soft tube
It is followed successively by pure biodegradable outer layer (1), the first adhesive layer (2), barrier layer (3), the second adhesive layer (4) and heat-sealing from outside to inside
Layer (5)；The pure biodegradable outer layer (1) is the polylactic acid film made of polylactic acid, and the barrier layer (3) is by barrier material
Barrier film made of expecting, the barrier material is by ethylene-vinyl alcohol copolymer and polylactic acid by 99:1 to the weight between 95:5
Amount ratio mixes, and the heat-sealing internal layer (5) is the heat sealing film made of heat-sealable material, and the heat-sealable material is gathered by metallocene
Ethylene and polylactic acid are mixed by 60:40 to the weight ratio between 50:50.
2. environment-friendly biodegradable composite soft tube according to claim 1, it is characterised in that: first adhesive layer (2)
It is polyvinyl resin with the second adhesive layer (4).
3. environment-friendly biodegradable composite soft tube according to claim 2, it is characterised in that: the polyvinyl resin is line
Property low-density maleated polyethylene connects branch.
4. according to claim 1 to environment-friendly biodegradable composite soft tube described in 3 any one, it is characterised in that: described pure
Between 85 μm to 125 μm of thickness of biodegradable outer layer (1), the thickness of first adhesive layer (2) between 25 μm to 35 μm,
The thickness of the barrier layer (3) between 70 μm to 90 μm, the thickness of second adhesive layer (4) between 25 μm to 35 μm,
The thickness of heat-sealing internal layer (5) is between 120 μm to 160 μm.
5. a kind of preparation method of environment-friendly biodegradable composite soft tube described in Claims 1-4 any one, feature exist
In: the preparation method includes:
Step 1: preparing polylactic acid film:
The polylactic acid film is made by blown film or extrusion process in polylactic acid particle；
Step 2: preparing barrier film:
First ethylene-vinyl alcohol copolymer particle and polylactic acid particle are mixed by 99:1 to the weight ratio heating stirring between 95:5
Uniformly, barrier material is made；
Again by the barrier material extrusion molding, the barrier film is made；
Step 3: preparing heat sealing film:
First metallocene PE particle and polylactic acid particle are mixed by 60:40 to the weight ratio heating stirring between 50:50 equal
It is even, heat-sealable material is made；
Again by the heat-sealable material extrusion molding, the heat sealing film is made；
Step 4: compound for the first time:
By extrusion composite technology, the polylactic acid film is bonded together with barrier film with polyvinyl resin, pipe is made
Body sheet material semi-finished product；
Step 5: second is compound:
By extrusion composite technology, the pipe shaft sheet material semi-finished product are bonded together with polyvinyl resin with heat sealing film, are made
At pipe shaft sheet material, wherein the heat sealing film is bonded in the barrier film of the pipe shaft sheet material semi-finished product by polyvinyl resin
On；
Step 6: pipe shaft tubulation:
By the pipe shaft sheet material is by docking or overlapped that mode is welded, the pipe of environment-friendly biodegradable composite soft tube is made
Body so that the polylactic acid film, it is compound for the first time used in polyvinyl resin, barrier film, second compound used
Polyvinyl resin and heat sealing film respectively as the pure biodegradable outer layer (1) of the pipe shaft, the first adhesive layer (2), barrier
Layer (3), the second adhesive layer (4) and heat-sealing internal layer (5).
6. the preparation method of environment-friendly biodegradable composite soft tube according to claim 5, it is characterised in that: described in step 2
The process for preparing barrier film is realized by extruder, wherein the ethylene-vinyl alcohol copolymer particle and polylactic acid particle are stirring
The heating temperature in mixed process is mixed between 170 DEG C to 230 DEG C, the pressure of the barrier material extrusion molding is in 4kg to 6kg
Between, the barrier film be extruded after cooling water temperature between 15 DEG C to 30 DEG C.
7. the preparation method of environment-friendly biodegradable composite soft tube according to claim 5, it is characterised in that: described in step 3
The process for preparing heat sealing film is realized by extruder, wherein the metallocene PE particle and polylactic acid particle are mixed in stirring
Heating temperature during conjunction between 170 DEG C to 230 DEG C, the pressure of the heat-sealable material extrusion molding 4kg to 6kg it
Between, the heat sealing film be extruded after cooling water temperature between 15 DEG C to 30 DEG C.
8. the preparation method of environment-friendly biodegradable composite soft tube according to claim 5, it is characterised in that: described in step 4
Process compound for the first time is realized by extrusion compounding machine, wherein the processing conditions for squeezing out compounding machine in first time is compound
Are as follows: processing temperature between 220 DEG C to 320 DEG C, unwinding tension in 15kg between 25kg, winding tension 20kg to 35kg it
Between, composite pressure is in 4kg between 6kg.
9. the preparation method of environment-friendly biodegradable composite soft tube according to claim 5, it is characterised in that: described in step 5
Second of compound process is realized by extrusion compounding machine, wherein the processing conditions during the extrusion compounding machine is compound at second
Are as follows: processing temperature between 220 DEG C to 320 DEG C, unwinding tension in 15kg between 25kg, winding tension 20kg to 35kg it
Between, composite pressure is in 4kg between 6kg.
10. the preparation method of environment-friendly biodegradable composite soft tube according to claim 5, it is characterised in that: step 6 institute
The process for stating pipe shaft tubulation is realized by tuber, wherein the processing conditions of the tuber are as follows: high-frequency welding energy 30% to
Between 100%, cooling temperature is between 15 DEG C to 22 DEG C, and pressure is in 2kg between 5kg.
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| CN110920159A (en) * | 2019-11-22 | 2020-03-27 | 湖北工业大学 | Polysaccharide/protein composite film with high barrier property and preparation method thereof |
| CN115320202A (en) * | 2022-07-18 | 2022-11-11 | 广东瑞远新材料有限公司 | Environment-friendly biodegradable composite hose and preparation method thereof |
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