CN104910434A - High-efficiency oxygen-insulation water-insulation blended full-degradable plastic film and preparation method thereof - Google Patents

Abstract

The invention discloses a high-efficiency oxygen-insulation water-insulation blended full-degradable plastic film. The high-efficiency oxygen-insulation water-insulation blended full-degradable plastic film is prepared from, by weight, 60 to 65 parts of corn starch, 7 to 9 parts of nano montmorillonite, 0.6 to 0.7 part of peanut oil, 1.2 to 1.4 parts of tetrabutyl titanate, 12 to 14 parts of ramie straw, 27 to 30 parts of polyvinyl alcohol, 1 to 2 parts of xanthan gum, 2 to 4 parts of sodium carboxymethylcellulose, 14 to 15 parts of polyethylene glycol, 7 to 9 parts of poly propylene carbonate, 4 to 6 parts of Pulullan, and 2 to 3 parts of ethyl silicon oil. According to a preparation method, synergistic effect of polyving akohol, polyethylene glycol, and poly propylene carbonate is realized; so that the melting point of polyving akohol is reduced, better blending with a starch master batch is realized, barrier property of plastic film is improved, and oxygen insulation and water insulation effects are excellent. The high-efficiency oxygen-insulation water-insulation blended full-degradable plastic film can be taken as food packaging bags and preservative film, and is capable of insulating oxygen and water, and realizing fresh-keeping effects; and prepared products are capable of satisfying using requirements and can be degraded rapidly after abandoning.

Description

Commixed type Based Full-degradable Plastics Film of a kind of efficient oxygen barrier water proof and preparation method thereof

Technical field

The present invention relates to plastics film technical field, particularly a kind of commixed type Based Full-degradable Plastics Film and preparation method thereof of efficient oxygen barrier water proof.

Background technology

In recent years, because waste plastic " white pollution " brought that be difficult to degrade is on the rise, cause global extensive concern, countries in the world have been put into effect restriction successively or have been prohibitted the use the relevant laws and regulations of non-degradable plastic packing article.On the other hand, be Nonrenewable resources owing to manufacturing the raw material oil of conventional plastic, along with a large amount of uses of the mankind will be exhausted, thus developing with renewable resources is that raw material, degradable environmental friendliness plastic are extremely urgent.Utilize biodegradable starch material to prepare the focus that degradable packaging film has become countries in the world research.But starch is while raising plastics degradability, the decline of its physical and mechanical properties can be caused on the one hand, make its processing difficulties, also there is wetting ability on the other hand too strong, and the consistency between most of resins for universal use is very poor, cause the thin film mechanical performance made to decline to a great extent, water isolating is poor, thus hinders the widespread use of starch plastic in industrialization promotion process.

Polyvinyl alcohol is a kind of broad-spectrum high molecular polymer, performance is between plastics and rubber, containing a large amount of polar group hydroxyls, toxicity is very low, molecular chain structure symmetry is regular, there is unique strong adherence, epithelium snappiness, smoothness, oil-proofness, solvent resistance, protective colloid, gas barrier performance and the water tolerance had through special processing, also there is certain biological degradability simultaneously, have in wet environment under bacterium existent condition and can resolve into water and carbonic acid gas completely in 6 months, it is Biodegradable Materials, but it is higher to degraded environmental requirement in degradation process, degradation speed is made still to seem relatively slow.

Ramie is the traditional fibre crop having distinct Chinese characteristics, and the long-term ramie planting area of China reaches about 200,000 hectares, and except ramie phloem extracts as except textile product, ramie boon is seldom utilized.The problems such as ramie boon utilization ratio is low, and process is difficult are governments at all levels and relevant department's question of common concern always, are also the problems that peasant is extremely concerned about.The by product that ramie core is processed as the large-scale production of ramie industry; important Biological resources; wherein rich cellulose, hemicellulose; its content of cellulose and the similar deciduous species of fibre shape; be the raw materials of desirable plant fiber tableware in theory, and it is rationally developed for raising ramie comprehensive value efficiently, promotes that ramie industry development is all significant.

Summary of the invention

The object of this invention is to provide commixed type Based Full-degradable Plastics Film of a kind of efficient oxygen barrier water proof and preparation method thereof.The present invention uses the starch of the surface hydrophobicity modification of high-content as matrix, coordinate and add the strongthener of ramie boon as starch base Based Full-degradable Plastics Film, can improve thin film strength and waterproof, oil preventing performance, and cost is low, can not produce pollution; Add polyvinyl alcohol and polyethylene glycol, the lined polymethyl ethylene carbonate of appropriate ratio, the fusing point of polyvinyl alcohol can be reduced, be convenient to carry out blended with starch matrix, the barrier property of film can be improved, oxygen barrier, good water insulation effect simultaneously.

In order to realize object of the present invention, the present invention is by following scheme implementation:

A commixed type Based Full-degradable Plastics Film for efficient oxygen barrier water proof, is made up of the raw material of following weight part: W-Gum 60-65, nano imvite 7-9, peanut oil 0.6-0.7, tetrabutyl titanate 1.2-1.4, ramie boon 12-14, polyvinyl alcohol 27-30, xanthan gum 1-2, Xylo-Mucine 2-4, polyethylene glycol 14-15, lined polymethyl ethylene carbonate 7-9, Pu Lula polysaccharide 4-6, ethyl silicon oil 2-3;

The commixed type Based Full-degradable Plastics Film of a kind of efficient oxygen barrier water proof of the present invention, be made up of following concrete steps:

(1) baking oven is put into after being mixed with nano imvite by W-Gum, take out after dry 120 minutes under the condition of 130 DEG C, (controlling bath temperature is 30 DEG C after being cooled to room temperature, mixed powder to be utilized sonic oscillation 30-40 minute, ultrasonic power is 100W), then mixed powder is transferred in stirring tank, add tetrabutyl titanate, control temperature is 75 DEG C, after stirring 15 minutes with the speed of 1500 revs/min, continue to add peanut oil, stir 15 minutes, finally take out and put into baking oven, the dry mixed powder namely obtaining surface hydrophobicity process for 60 minutes under the condition of 120 DEG C,

(2) 80-100 object powder is made after the drying of ramie boon through corase grind, fine grinding, then put into nano grinder and be ground into nanoscale powder, mix with Xylo-Mucine again, kneader is put into after mixing, temperature control 120 DEG C, mediate 15 minutes, release cooling, obtain ramie boon and strengthen material;

(3) mixed powder of surface hydrophobicity modification step (1) obtained mixes with ethyl silicon oil, by colloidal mill dispersion 60-90 minute, then the ramie boon enhancing material that step (2) obtains is added, by in dual-screw pelletizer, melt extrude granulation under the condition of control temperature 170-180 DEG C, obtain the starch masterbatch that diameter is 6mm;

(4) after starch masterbatch, polyvinyl alcohol, polyethylene glycol, lined polymethyl ethylene carbonate and all the other remaining components that step (3) obtains being mixed at normal temperatures, join in single screw extrusion machine, control temperature carries out hot-melt extruded Blown Film under the processing temperature of 170-180 DEG C, last qualitative rolling, packs and get final product.

The invention has the beneficial effects as follows: the present invention carries out surface hydrophobicity modification by after starch, nano imvite mixing, first pass through sonic oscillation, the particle diameter of starch can be made to decline, specific surface area increases, effectively shield starch surface hydroxyl with tetrabutyl titanate and hydrophobizing agent peanut oil again, form high hydrophobic layer; Simultaneously nano imvite has good gas barrier property and good far-infrared reflection, anti-aging, simultaneously heat-resisting, wear-resisting, intensity is high; Recycling Xylo-Mucine carries out enhancing modified to ramie boon, then mixes with the starch-based material of surface hydrophobicity modification, improve intensity, water tolerance, the oil-proofness of starch-based material further, and ramie boon cost is low, turns waste into wealth.

The present invention finally by polyvinyl alcohol, polyethylene glycol, lined polymethyl ethylene carbonate synergy, can reduce the fusing point of polyvinyl alcohol, better and starch masterbatch blended, the barrier property of plastics film can also be improved, oxygen barrier, good water insulation effect.Product of the present invention can be used as food pack, preservative film, oxygen barrier, water proof, can play fresh-keeping effect, and product not only can meet service requirements but also can at discarded rear fast degradation.

Specific embodiments

Below by specific examples, the present invention is described in detail.

A commixed type Based Full-degradable Plastics Film for efficient oxygen barrier water proof, is made up of the raw material of following weight part (kilogram): W-Gum 60, nano imvite 7, peanut oil 0.6, tetrabutyl titanate 1.2, ramie boon 12, polyvinyl alcohol 27, xanthan gum 1, Xylo-Mucine 2, polyethylene glycol 14, lined polymethyl ethylene carbonate 7, Pu Lula polysaccharide 4, ethyl silicon oil 2;

The commixed type Based Full-degradable Plastics Film of a kind of efficient oxygen barrier water proof of the present invention, be made up of following concrete steps:

(1) baking oven is put into after being mixed with nano imvite by W-Gum, take out after dry 120 minutes under the condition of 130 DEG C, (controlling bath temperature is 30 DEG C after being cooled to room temperature, mixed powder to be utilized sonic oscillation 30 minutes, ultrasonic power is 100W), then mixed powder is transferred in stirring tank, add tetrabutyl titanate, control temperature is 75 DEG C, after stirring 15 minutes with the speed of 1500 revs/min, continue to add peanut oil, stir 15 minutes, finally take out and put into baking oven, the dry mixed powder namely obtaining surface hydrophobicity process for 60 minutes under the condition of 120 DEG C,

(2) 80 object powder are made after the drying of ramie boon through corase grind, fine grinding, then put into nano grinder and be ground into nanoscale powder, mix with Xylo-Mucine again, kneader is put into after mixing, temperature control 120 DEG C, mediate 15 minutes, release cooling, obtain ramie boon and strengthen material;

(3) mixed powder of surface hydrophobicity modification step (1) obtained mixes with ethyl silicon oil, 60 minutes are disperseed by colloidal mill, then the ramie boon enhancing material that step (2) obtains is added, by in dual-screw pelletizer, melt extrude granulation under the condition of control temperature 170-180 DEG C, obtain the starch masterbatch that diameter is 6mm;

(4) after starch masterbatch, polyvinyl alcohol, polyethylene glycol, lined polymethyl ethylene carbonate and all the other remaining components that step (3) obtains being mixed at normal temperatures, join in single screw extrusion machine, control temperature carries out hot-melt extruded Blown Film under the processing temperature of 170-180 DEG C, last qualitative rolling, packs and get final product.

Product of the present invention is carried out explanation test according to the standard of GB/T 20197-2006, and the soil through 4 months buries experiment, and biological degradation rate can reach 59.8%.Carry out Mechanics Performance Testing according to GB/T 1040.3-2006, transverse tensile strength is 25.10MPa, and elongation at break is 670.12%; Longitudinal tensile strength is 23.86 MPa, and elongation at break is 439.15%, conformance with standard.

Claims (2)

1. the commixed type Based Full-degradable Plastics Film of an efficient oxygen barrier water proof, it is characterized in that, be made up of the raw material of following weight part: W-Gum 60-65, nano imvite 7-9, peanut oil 0.6-0.7, tetrabutyl titanate 1.2-1.4, ramie boon 12-14, polyvinyl alcohol 27-30, xanthan gum 1-2, Xylo-Mucine 2-4, polyethylene glycol 14-15, lined polymethyl ethylene carbonate 7-9, Pu Lula polysaccharide 4-6, ethyl silicon oil 2-3.

2. the commixed type Based Full-degradable Plastics Film of a kind of efficient oxygen barrier water proof according to claim 1, is characterized in that, be made up of following concrete steps:

(1) baking oven is put into after being mixed with nano imvite by W-Gum, take out after dry 120 minutes under the condition of 130 DEG C, (controlling bath temperature is 30 DEG C after being cooled to room temperature, mixed powder to be utilized sonic oscillation 30-40 minute, ultrasonic power is 100W), then mixed powder is transferred in stirring tank, add tetrabutyl titanate, control temperature is 75 DEG C, after stirring 15 minutes with the speed of 1500 revs/min, continue to add peanut oil, stir 15 minutes, finally take out and put into baking oven, the dry mixed powder namely obtaining surface hydrophobicity process for 60 minutes under the condition of 120 DEG C,

(2) 80-100 object powder is made after the drying of ramie boon through corase grind, fine grinding, then put into nano grinder and be ground into nanoscale powder, mix with Xylo-Mucine again, kneader is put into after mixing, temperature control 120 DEG C, mediate 15 minutes, release cooling, obtain ramie boon and strengthen material;

(3) mixed powder of surface hydrophobicity modification step (1) obtained mixes with ethyl silicon oil, by colloidal mill dispersion 60-90 minute, then the ramie boon enhancing material that step (2) obtains is added, by in dual-screw pelletizer, melt extrude granulation under the condition of control temperature 170-180 DEG C, obtain the starch masterbatch that diameter is 6mm;

(4) after starch masterbatch, polyvinyl alcohol, polyethylene glycol, lined polymethyl ethylene carbonate and all the other remaining components that step (3) obtains being mixed at normal temperatures, join in single screw extrusion machine, control temperature carries out hot-melt extruded Blown Film under the processing temperature of 170-180 DEG C, last qualitative rolling, packs and get final product.