CN110204794A - A kind of low cost high resilience biodegrade cushioned packing materials and preparation method - Google Patents
A kind of low cost high resilience biodegrade cushioned packing materials and preparation method Download PDFInfo
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- CN110204794A CN110204794A CN201910539927.5A CN201910539927A CN110204794A CN 110204794 A CN110204794 A CN 110204794A CN 201910539927 A CN201910539927 A CN 201910539927A CN 110204794 A CN110204794 A CN 110204794A
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- 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
- B65D65/46—Applications of disintegrable, dissolvable or edible materials
- B65D65/466—Bio- or photodegradable packaging materials
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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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
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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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
- C08J9/0071—Nanosized fillers, i.e. having at least one dimension below 100 nanometers
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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
- C08J2201/00—Foams characterised by the foaming process
- C08J2201/02—Foams characterised by the foaming process characterised by mechanical pre- or post-treatments
- C08J2201/03—Extrusion of the foamable blend
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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
- C08J2303/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2303/02—Starch; Degradation products thereof, e.g. dextrin
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- 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
- C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2429/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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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
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
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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
- C08J2497/00—Characterised by the use of lignin-containing materials
- C08J2497/02—Lignocellulosic material, e.g. wood, straw or bagasse
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- 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
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Abstract
The present invention proposes a kind of inexpensive high resilience biodegrade cushioned packing materials and preparation method; the vibration-damping foamed packaging material is that the stalk fibre high-speed stirred after starch gelatinization with solution beam is formed cotton-shaped material; it Screw Extrusion and crushes after simultaneously mixing starch, polyvinyl alcohol, nucleating agent, silicone oil with water as particle; then cotton-shaped material is uniformly mixed with pulverized particles, is made through single-screw machine extrusion foaming.Cushioned packing materials provided by the invention are low in cost, it can be achieved that degradable, have excellent resilience, while lustrous surface is uniform, water-fast, anti-moisture performance is good, and the surface with moderate hardness, appropriate elasticity and softness has a extensive future.
Description
Technical field
The present invention relates to field of packaging material, more particularly to a kind of inexpensive high resilience biodegrade damping packet
Package material and preparation method.
Background technique
In recent years, with commodity economy, the especially development of electric business industry, to avoid the breakage during Commodity Transportation,
The effect of packaging material becomes increasingly conspicuous, and packaging market scale rapidly expands, especially various electronic products, ceramic product, glass
Product, precision instruments enter electric business logistic industry, so that amortizing packaging material demand increases.Wherein foamed plastics is due to it
Good cushion performance and vibration absorbing performance become modern age widely used slow packaging and rush material.
Then, the extensive use of bubble wrap material all causes huge pressure to resource or environment.In order to
Packaging is reduced to the pressure of environment, prior art proposes to substitute conventional plastic using biodegradable plastic, however, most of biology
Degradative plastics is at high cost, so that user is difficult to receive.Therefore, the environmentally protective foamed plastic for seeking low cost is ground as various countries
The focus studied carefully.
Starch is the photosynthetic final product of green plants, is the most abundant renewable resource of biosynthesis, has
The features such as wide in variety, cheap.In addition, starch also has die swell performance and antistatic property, it can be used for packing fortune
Defeated equal fields.Starch has excellent biodegradability vulnerable to microbial attack.Therefore, starch-based degradable foam is developed
Plastics are not only preferably to be opened up a new way using natural resources abundant, but also can solve " white dirt
Dye " provides good " fertile soil " to our existing living environments and sustainable development, in addition can also alleviate biochemical energy shortages
Crisis.Therefore starch foaming plastics packaging field have Prospects of Sustainable Development, for household appliances, 3C electronics, easily
Broken product packaging industry can generally substitute the foamed plastics such as EPE, EPS.
Chinese invention patent application number 201810477566.1 discloses a kind of starch blending degradable packaging material, at
The quality proportioning divided includes: 10 parts of polyethylene, 3-5 parts of resin, 2-4 parts of cornstarch, 2-4 parts of potato starch, ethylene-acrylic acid
It is 2-4 parts of copolymer, 2-4 parts of ethylene-vinyl alcohol copolymer, 2-4 parts of polyvinyl alcohol, 1-2 parts of cellulose, 1-2 parts of lignin, photosensitive
1-2 parts of agent.Chinese invention patent application number 201811295553.9 discloses a kind of starch base foamed damping material and packaging
Material, the starch base foamed damping material are mainly prepared by the raw material of following parts by weight meter: 11-17 parts of inorganic strong alkali, third
29-34 parts of olefin(e) acid, 12-24 parts of acrylamide, 6-15 parts of starch, 0.4-0.6 parts of initiator, 0.4-0.6 parts of plasticizer and friendship
Agent 0.4-0.6 parts of connection.
In order to solve, the generally existing resilience of starch foaming material is poor, expansion ratio is low, density is low, toughness is poor
Problem, and improve starch foaming material simultaneously and be easy to make moist and influence the defect of resilience performance, it is necessary to propose a kind of novel shallow lake
Powder base foam package material, and then promote the comprehensive performance of starch foaming material.
Summary of the invention
Have the defects that rebound degree is low, expansion ratio is low for current starch foaming packaging material, be easy dampness, the present invention
A kind of inexpensive high resilience biodegrade cushioned packing materials and preparation method are proposed, thus ensure that starch foaming material
Low cost and while biological degradability, improve material rebounds, expansion ratio and water resistance, have excellent damping slow
Punching effect.
To solve the above problems, the invention adopts the following technical scheme:
A kind of preparation method of low cost high resilience biodegrade cushioned packing materials, it is specific the preparation method is as follows:
(1) starch and water are added in high-speed mixer, are heated to 60-100 DEG C and 12- is stirred with the revolving speed of 500-700rpm
Then the stalk fibre of solution beam is added so that starch gelatinization forms pulpous state paste in 18min, continue to stir 20-30min, so that starch
Paste adherency stalk fibre completely simultaneously forms bulk, then discharges, is cooling, crushing, obtaining fluffy cotton-shaped material；
(2) starch, polyvinyl alcohol, nucleating agent, silicone oil are added in high-speed mixer, are uniformly dispersed at room temperature, then
Water is added, continues stirring to half dry state, obtains half dry state material；
(3) half dry state material is sent into single screw extrusion machine, control Screw Extrusion temperature is 80-110 DEG C, and revolving speed 45-60Hz makes
The material that must be squeezed out is in white tiles shape, and is plasticized part polyethylene alcohol, then natural cooling, then crushes and crosses 5 mesh screens, obtain
To pulverized particles；
(4) cotton-shaped material is uniformly mixed with pulverized particles, then through short length through than single-screw machine extrusion foaming, the single-screw machine
Revolving speed be 300-500r/min, pressure 30-60MPa, obtain inexpensive high resilience biodegrade cushioned packing materials.
During starch gelatinization, sufficient moisture is the key factor for guaranteeing starch gelatinization, therefore improving water consumption can be with
Deepen the pasting effect of starch, and then improves starch plasticizing capacity, therefore water consumption of the invention is preferably starch quality
60%；During starch gelatinization, stirring can encourage bursting apart for amylum body, therefore mixing speed is also the important of raising starch gelatinization
Factor；Since starch is gelatinized more completely under the conditions of pulpous state, the starch pulpous state paste that the present invention obtains is easy to adhere to completely
Stalk fibre, have certain plasticizing processing performance, can not only realize it is degradable and reduce foamed material cost, while
It realizes and is uniformly dispersed after fiber foam, assign foamed material excellent resilience, prevent foaming body from collapsing, improve toughness.It is preferred that
, in step (1), starch, water, stalk fibre mass ratio be 10:6:15-30.
Preferably, the stalk fibre is by wheat stalk, rice straw, corn stover, broomcorn straw, grain stem, oil
The Combined machining of one or more of dish bar, waste of flax, reed rod, cotton stem, beans bar and obtain, length 0.9-
2mm。
Preferably, in step (2), starch, polyvinyl alcohol, nucleating agent, silicone oil, water mass ratio be 100:70-100:
5-15:12-18:12；The additional amount for controlling water is the 12% of starch quality, to guarantee that starch is half dry state in mixed at room temperature, is prevented
It is only agglomerating, influence subsequent charge.
Preferably, the starch is green starch, tapioca, sweet potato starch, starch from sweet potato, potato starch, wheat
The combination of one or more of starch, water caltrop starch, Rhizoma Nelumbinis starch, cornstarch.
Preferably, the nucleating agent is one of nano talc, nano silica.
Further, by controlling the ratio of water consumption and starch quality, the starch in mixed at room temperature, which has been effectively ensured, is
Half dry state can prevent agglomerating and influence subsequent charge；By the way that silicone oil is added, not only increase starch foaming mobility, and make
It is uniform to obtain starch foaming material lustrous surface, improves water-fast, the anti-moisture performance of material；It is squeezed using the single screw rod without head pressure
Out when machine, it is necessary to screw speed is well controlled, because revolving speed will lead to polyvinyl alcohol slowly excessively and be plasticized completely, influences expansion ratio,
And too fast will cause of revolving speed is foamed in advance, therefore the present invention controls revolving speed in 45-60Hz, further preferably 50Hz, screw rod
The temperature of extrusion is 100 DEG C, and material can be made preferably to be rendered as white tiles shape.
Preferably, cotton-shaped material in step (4), pulverized particles mass ratio be 1:3-5.
Further, in last short length through than in single-screw machine extrusion and foaming process, in order to guarantee the Shi Mo that foams
Head establishes high pressure, so that remaining moisture is in short length through high speed shear, the high pressure than single-screw machine extruder in mixed material
The lower foaming rapidly of power effect, obtains the vibration-damping foamed material with the surface of moderate hardness, appropriate elasticity and softness.It is preferred that
, short length described in step (4) is 10-15:1, single screw rod barrel sectional area and die head aperture through the draw ratio than single-screw machine
The ratio of sectional area is greater than 30, and die head hole shape can be one of cylindric, sheet, arc-shaped, odontoid.
The present invention also provides a kind of inexpensive high resilience biodegrade dampings that a kind of preparation method is prepared
Packaging material, the vibration-damping foamed packaging material be will after starch gelatinization with solution beam stalk fibre high-speed stirred be formed it is cotton-shaped
Material, while Screw Extrusion and crushing as particle after starch, polyvinyl alcohol, nucleating agent, silicone oil are mixed with water, then by cotton-shaped material
It is uniformly mixed with pulverized particles, is made through single-screw machine extrusion foaming.
Existing starch foaming material haves the defects that rebound degree is low, expansion ratio is low, is easy dampness, limits it and is wrapping
The application in package material field.In consideration of it, the present invention proposes a kind of inexpensive high resilience biodegrade cushioned packing materials and system
Starch and water are added in high-speed mixer Preparation Method, heat and high-speed stirred is gelatinized, form pulpous state paste, then will solve beam
High-speed mixer is added in stalk fibre, continues to stir, until gelatinized corn starch adheres to stalk fibre completely, forms bulk, then discharge,
Cooling, crushing is fluffy cotton-shaped material；At room temperature by starch, polyvinyl alcohol, nucleating agent, silicone oil, in high-speed mixer
In be uniformly dispersed, be then added water, stirring to half dry state；Half dry state material is sent into the single screw extrusion machine without head pressure, is squeezed
It is cooling after out, it crushes as particle；Floccule is uniformly mixed with pulverized particles, through short length through than single-screw machine extrusion foaming, system
Obtain vibration-damping foamed material.Cushioned packing materials provided by the invention are low in cost, it can be achieved that degradable, return with excellent
Elasticity, while lustrous surface is uniform, it is water-fast, anti-moisture performance is good, the surface with moderate hardness, appropriate elasticity and softness,
It has a extensive future.
The present invention proposes a kind of inexpensive high resilience biodegrade cushioned packing materials and preparation method, with the prior art
It compares, the feature and excellent effect protruded is:
1, for the present invention by wrapping gelatinized starch in solution beam stalk fibre in advance, obtained foamed material can not only realize complete drop
Solution, and the cost of foamed material is reduced, and be uniformly dispersed after making fiber foam, assign foamed material excellent rebound
Property, it can prevent foaming body from collapsing.
2, not only increase starch foaming mobility, and to form sediment by addition silicone oil in foamed material of the invention
Powder foamed material lustrous surface is uniform, improves water-fast, anti-moisture performance.
3, the cushioned packing materials that the present invention obtains have the surface of moderate hardness, appropriate elasticity and softness, simultaneously
It is low in cost with environment friendly and pollution-free, it is renewable the advantages that.
Detailed description of the invention
Attached drawing 1: the foaming body photo that embodiment 1 foams foams loose, and multiplying power is high, and lustrous surface is good.
Attached drawing 2: the preparatory packet stalk fibre of gelatinized starch is not used in comparative example 1, and expansion ratio is low, and lustrous surface is poor.
Specific embodiment
In the following, the present invention will be further described in detail by way of specific embodiments, but this should not be interpreted as to the present invention
Range be only limitted to example below.Without departing from the idea of the above method of the present invention, according to ordinary skill
The various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
(1) starch and water are added in high-speed mixer, are heated to 90 DEG C and 16min is stirred with the revolving speed of 580rpm, so that forming sediment
Paste mixingization forms pulpous state paste, and high-speed mixer then is added in the stalk fibre for solving beam, continues to stir 24min, so that gelatinized corn starch
Stalk fibre is adhered to completely and forms bulk, then discharges, is cooling, crushing, obtaining fluffy cotton-shaped material；Starch is mung bean shallow lake
Powder；Wherein, starch, water, stalk fibre mass ratio be 10:6:23；
(2) starch, polyvinyl alcohol, nucleating agent, silicone oil are added in high-speed mixer, are uniformly dispersed at room temperature, then
Water is added, continues stirring to half dry state, obtains half dry state material；Starch is green starch；Stalk fibre by wheat stalk process and
It obtains；Nucleating agent is nano talc；Wherein, starch, polyvinyl alcohol, nucleating agent, silicone oil, water mass ratio be 100:90:
9:16:12；
(3) half dry state material is sent into the single screw extrusion machine without head pressure, controls Screw Extrusion temperature and revolving speed, so that squeezing out
Material be in white tiles shape, and be plasticized part polyethylene alcohol, then natural cooling then crushes and crosses 5 mesh screens, crushed
Particle；Single screw extrusion machine is the single screw extrusion machine without head pressure, and the temperature of Screw Extrusion is 100 DEG C, and revolving speed control exists
50Hz；
(4) cotton-shaped material is uniformly mixed with pulverized particles, then through short length through obtaining inexpensive height than single-screw machine extrusion foaming
Resilience biodegrade cushioned packing materials；Wherein, cotton-shaped material, pulverized particles mass ratio be 1:4；Short length is through than single screw rod
The draw ratio of machine is 13:1, and the ratio of single screw rod barrel sectional area and die head aperture sectional area is 33, revolving speed 400r/min, pressure
For 45MPa, die head hole shape is cylindric.
Test method:
The cushioned packing materials that the present embodiment is prepared carry out resilience performance test, and using vernier caliper test, the present invention subtracts
The diameter for shaking packaging material sample, then clamps sample with slide calliper rule and is compressed at the 1/2 of diameter, unclamp after 5s, use again after 1min
Slide calliper rule are surveyed by the diameter at pressure, calculate the formula of rebound degree: rebound degree=(- 1/2 diameter of size after rebound)/(1/2 diameter) ×
100%, obtain that the results are shown in Table 1；
The cushioned packing materials that the present embodiment is prepared carry out expansion ratio test, survey referring to GB/T6342-1996 standard
The cushioned packing materials of the invention radial expansion rate in Screw Extrusion foaming process is tried, and then calculates expansion ratio: foaming times
Rate=foam sample cross sectional radius/mouth mold cross sectional radius, obtains that the results are shown in Table 1；Expansion ratio is high, and foaming body
It is full.As shown in Fig. 1.
The cushioned packing materials that the present embodiment is prepared carry out water resistance test, and diameter is made in cushioned packing materials
For the spherical foaming body of 3cm, first by sample first in vacuum drying oven 70 DEG C dry 24 hours, then weigh, write down at this time
Weight W0, then it is placed in water at room temperature, the W that weighs again to obtain after the water on surface is removed after 12ht, counted after repeating six tests
Calculate water absorption rate: water absorption rate=(Wt-W0)/W0× 100%, obtain that the results are shown in Table 1.
Embodiment 2
(1) starch and water are added in high-speed mixer, are heated to 60 DEG C and 18min is stirred with the revolving speed of 500rpm, so that forming sediment
Paste mixingization forms pulpous state paste, and high-speed mixer then is added in the stalk fibre for solving beam, continues to stir 20min, so that gelatinized corn starch
Stalk fibre is adhered to completely and forms bulk, then discharges, is cooling, crushing, obtaining fluffy cotton-shaped material；Starch is para arrowroot
Powder；Wherein, starch, water, stalk fibre mass ratio be 10:6:15；
(2) starch, polyvinyl alcohol, nucleating agent, silicone oil are added in high-speed mixer, are uniformly dispersed at room temperature, then
Water is added, continues stirring to half dry state, obtains half dry state material；Starch is tapioca；Stalk fibre by rice straw process and
It obtains；Nucleating agent is nano silica；Wherein, starch, polyvinyl alcohol, nucleating agent, silicone oil, water mass ratio be 100:
70:5:12:12；
(3) half dry state material is sent into the single screw extrusion machine without head pressure, controls Screw Extrusion temperature and revolving speed, so that squeezing out
Material be in white tiles shape, and be plasticized part polyethylene alcohol, then natural cooling then crushes and crosses 5 mesh screens, crushed
Particle；Single screw extrusion machine is the single screw extrusion machine without head pressure, and the temperature of Screw Extrusion is 80 DEG C, and revolving speed control exists
45Hz；
(4) cotton-shaped material is uniformly mixed with pulverized particles, then through short length through obtaining inexpensive height than single-screw machine extrusion foaming
Resilience biodegrade cushioned packing materials；Wherein, cotton-shaped material, pulverized particles mass ratio be 1:3；Short length is through than single screw rod
The draw ratio of machine is 10:1, and the ratio of single screw rod barrel sectional area and die head aperture sectional area is 31, revolving speed 350r/min, pressure
For 60MPa, die head hole shape is sheet.
It is tested using the method for embodiment 1, test result is as shown in table 1.
Embodiment 3
(1) starch and water are added in high-speed mixer, are heated to 100 DEG C and 12min is stirred with the revolving speed of 700rpm, so that forming sediment
Paste mixingization forms pulpous state paste, and high-speed mixer then is added in the stalk fibre for solving beam, continues to stir 30min, so that gelatinized corn starch
Stalk fibre is adhered to completely and forms bulk, then discharges, is cooling, crushing, obtaining fluffy cotton-shaped material；Starch is sweet potato shallow lake
Powder；Wherein, starch, water, stalk fibre mass ratio be 10:6:30；
(2) starch, polyvinyl alcohol, nucleating agent, silicone oil are added in high-speed mixer, are uniformly dispersed at room temperature, then
Water is added, continues stirring to half dry state, obtains half dry state material；Starch is sweet potato starch；Stalk fibre by corn stover process and
It obtains；Nucleating agent is nano talc；Wherein, starch, polyvinyl alcohol, nucleating agent, silicone oil, water mass ratio be 100:
100: 15: 18:12；
(3) half dry state material is sent into the single screw extrusion machine without head pressure, controls Screw Extrusion temperature and revolving speed, so that squeezing out
Material be in white tiles shape, and be plasticized part polyethylene alcohol, then natural cooling then crushes and crosses 5 mesh screens, crushed
Particle；Single screw extrusion machine is the single screw extrusion machine without head pressure, and the temperature of Screw Extrusion is 110 DEG C, and revolving speed control exists
60Hz；
(4) cotton-shaped material is uniformly mixed with pulverized particles, then through short length through obtaining inexpensive height than single-screw machine extrusion foaming
Resilience biodegrade cushioned packing materials；Wherein, cotton-shaped material, pulverized particles mass ratio be 1:5；Short length is through than single screw rod
The draw ratio of machine is 15:1, and the ratio of single screw rod barrel sectional area and die head aperture sectional area is 35, revolving speed 500r/min, pressure
For 30MPa, die head hole shape is arc-shaped.
It is tested using the method for embodiment 1, test result is as shown in table 1.
Embodiment 4
(1) starch and water are added in high-speed mixer, are heated to 80 DEG C and 15min is stirred with the revolving speed of 600rpm, so that forming sediment
Paste mixingization forms pulpous state paste, and high-speed mixer then is added in the stalk fibre for solving beam, continues to stir 25min, so that gelatinized corn starch
Stalk fibre is adhered to completely and forms bulk, then discharges, is cooling, crushing, obtaining fluffy cotton-shaped material；Starch is corn shallow lake
Powder；Wherein, starch, water, stalk fibre mass ratio be 10:6:25；
(2) starch, polyvinyl alcohol, nucleating agent, silicone oil are added in high-speed mixer, are uniformly dispersed at room temperature, then
Water is added, continues stirring to half dry state, obtains half dry state material；Starch is cornstarch；Stalk fibre by broomcorn straw process and
It obtains；Nucleating agent is nano talc, nano silica；Wherein, the quality of starch, polyvinyl alcohol, nucleating agent, silicone oil, water
Ratio is 100:85:10:15:12；
(3) half dry state material is sent into the single screw extrusion machine without head pressure, controls Screw Extrusion temperature and revolving speed, so that squeezing out
Material be in white tiles shape, and be plasticized part polyethylene alcohol, then natural cooling then crushes and crosses 5 mesh screens, crushed
Particle；Single screw extrusion machine is the single screw extrusion machine without head pressure, and the temperature of Screw Extrusion is 100 DEG C, and revolving speed control exists
50Hz；
(4) cotton-shaped material is uniformly mixed with pulverized particles, then through short length through obtaining inexpensive height than single-screw machine extrusion foaming
Resilience biodegrade cushioned packing materials；Wherein, cotton-shaped material, pulverized particles mass ratio be 1:4；Short length is through than single screw rod
The draw ratio of machine is 12:1, and the ratio of single screw rod barrel sectional area and die head aperture sectional area is 32, revolving speed 450r/min, pressure
For 50MPa, die head hole shape is odontoid.
It is tested using the method for embodiment 1, test result is as shown in table 1.
Comparative example 1
Comparative example 1 compared with Example 1, does not wrap gelatinized starch in solution beam stalk fibre in advance, but is directly added into Xie Shu's
Stalk fibre, cushioned packing materials obtained are tested using the method for embodiment 1, and test result is as shown in table 1.Foaming body
Expansion ratio is low, and sponginess is poor, and surface is not mellow and full.As shown in Fig. 2.
Table 1:
| Performance indicator | Rebound degree (%) | Expansion ratio | 12h water absorption rate (%) |
| Embodiment 1 | 96.5 | 16.6 | 19.2 |
| Embodiment 2 | 96.7 | 17.3 | 12.5 |
| Embodiment 3 | 96.2 | 17.2 | 13.6 |
| Embodiment 4 | 96.4 | 16.9 | 12.1 |
| Comparative example 1 | 63.3 | 10.8 | 23.2 |
Claims (10)
1. a kind of preparation method of low cost high resilience biodegrade cushioned packing materials, which is characterized in that specific preparation side
Method is as follows:
(1) starch and water are added in high-speed mixer, are heated to 60-100 DEG C and 12- is stirred with the revolving speed of 500-700rpm
Then the stalk fibre of solution beam is added so that starch gelatinization forms pulpous state paste in 18min, continue to stir 20-30min, so that starch
Paste adherency stalk fibre completely simultaneously forms bulk, then discharges, is cooling, crushing, obtaining fluffy cotton-shaped material；
(2) starch, polyvinyl alcohol, nucleating agent, silicone oil are added in high-speed mixer, are uniformly dispersed at room temperature, then
Water is added, continues stirring to half dry state, obtains half dry state material；
(3) half dry state material is sent into single screw extrusion machine, control Screw Extrusion temperature is 80-110 DEG C, and revolving speed 45-60Hz makes
The material that must be squeezed out is in white tiles shape, and is plasticized part polyethylene alcohol, then natural cooling, then crushes and crosses 5 mesh screens, obtain
To pulverized particles；
(4) cotton-shaped material is uniformly mixed with pulverized particles, then through short length through than single-screw machine extrusion foaming, the single-screw machine
Revolving speed be 300-500r/min, pressure 30-60MPa, obtain inexpensive high resilience biodegrade cushioned packing materials.
2. a kind of preparation method of inexpensive high resilience biodegrade cushioned packing materials according to claim 1,
Be characterized in that, in step (1), starch, water, stalk fibre mass ratio be 10:6:15-30.
3. a kind of preparation method of inexpensive high resilience biodegrade cushioned packing materials according to claim 1,
It is characterized in that, the stalk fibre is by wheat stalk, rice straw, corn stover, broomcorn straw, grain stem, rape straw, fiber crops
The Combined machining of one or more of bar, reed rod, cotton stem, beans bar and obtain, length 0.9-2mm.
4. a kind of preparation method of inexpensive high resilience biodegrade cushioned packing materials according to claim 1,
Be characterized in that, in step (2), starch, polyvinyl alcohol, nucleating agent, silicone oil, water mass ratio be 100:70-100:5-15:
12-18:12。
5. a kind of preparation method of inexpensive high resilience biodegrade cushioned packing materials according to claim 1,
It is characterized in that, the starch is green starch, tapioca, sweet potato starch, starch from sweet potato, potato starch, wheaten starch, water chestnut
The combination of one or more of angle starch, Rhizoma Nelumbinis starch, cornstarch.
6. a kind of preparation method of inexpensive high resilience biodegrade cushioned packing materials according to claim 1,
It is characterized in that, the nucleating agent is one of nano talc, nano silica.
7. a kind of preparation method of inexpensive high resilience biodegrade cushioned packing materials according to claim 1,
It is characterized in that, single screw extrusion machine described in step (3) is the single screw extrusion machine without head pressure, and the temperature of Screw Extrusion is
100 DEG C, revolving speed is controlled in 50Hz.
8. a kind of preparation method of inexpensive high resilience biodegrade cushioned packing materials according to claim 1,
Be characterized in that, cotton-shaped material in step (4), pulverized particles mass ratio be 1:3-5.
9. a kind of preparation method of inexpensive high resilience biodegrade cushioned packing materials according to claim 1,
It is characterized in that, short length described in step (4) is 10-15:1, single screw rod barrel sectional area and mould through the draw ratio than single-screw machine
The ratio of head aperture sectional area is greater than 30, and die head hole shape can be one of cylindric, sheet, arc-shaped, odontoid.
10. a kind of inexpensive high resilience biodegrade that the preparation method as described in claim 1-9 any claim is prepared
Cushioned packing materials.
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