CN104927092A - Starch blended degradable plastic film with antistatic effect and preparation method for starch blended degradable plastic film - Google Patents

Abstract

The invention discloses a starch blended degradable plastic film with an antistatic effect and a preparation method for the starch blended degradable plastic film. The starch blended degradable plastic film is prepared from the following raw materials in parts by weight: 60 to 65 parts of corn starch, 7 to 9 parts of nano-montmorillonite, 0.6 to 0.7 parts of peanut oil, 1.2 to 1.4 parts of tetrabutyl titanate, 12 to 14 parts of ramie sticks, 30 to 35 parts of polyvinyl alcohol, 12 to 15 parts of dipropylene glycol dibenzoate, 1.5 to 2 parts of liquid calcium zinc, 2 to 2.5 parts of an antistatic agent SWJU-1, 1 to 2 parts of an antioxidant 1010, 5 to 7 parts of ultrafine medical stone and 2 to 3 parts of polyvinylpyrrolidone. In order to overcome the shortcoming that a plastic film easily generates static electricity, the antistatic agent SWJU-1 is added in a preparation process, so that the antistatic property of the film can be improved, dust adsorbed on the surface of the film due to static electricity is reduced, and the fire risk is lowered; the film can be used for agriculture, foods, industries and the like, is safe, firm, durable, soft and antistatic, and can be directly degraded in the environment after being discarded.

Description

A kind of starch blending degradation plastic film with antistatic effect and preparation method thereof

Technical field

The present invention relates to plastics film technical field, particularly a kind of starch blending degradation plastic film with antistatic effect and preparation method thereof.

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, block-water performance 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; the water tolerance that there is unique strong adherence, epithelium snappiness, smoothness, oil-proofness, solvent resistance, protective colloid, gas barrier performance and have through special processing; also there is certain biological degradability simultaneously; having in wet environment under bacterium existent condition and can resolve into water and carbonic acid gas completely in 6 months, is Biodegradable Materials.

Current plastics film specific inductivity is little, and generally belong to non-conductor, insulating property are higher, and therefore, the generation of electrostatic is unescapable.Because build-up of electrostatic charges is on the surface of plastics film, easily causes surface adsorption dust, even cause electric discharge, cause fire.

Summary of the invention

The present invention is directed to the shortcoming that plastics film easily produces electrostatic, a kind of starch blending degradation plastic film with antistatic effect and preparation method thereof is provided.

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

There is a starch blending degradation plastic film for antistatic effect, 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 30-35, dipropylene glycol dibenzoate 12-15, liquid calcium zinc 1.5-2, SWJU-1 static inhibitor 2-2.5, antioxidant 1010 1-2, ultra-fine medical stone 5-7, polyvinylpyrrolidone 2-3;

A kind of starch blending degradation plastic film with antistatic effect 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 mix with ultra-fine medical stone and put into nano grinder and be ground into nanoscale powder, mix with polyvinylpyrrolidone again, kneader is put into after mixing, temperature control 130 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 liquid calcium zinc, antioxidant 1010, 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, dipropylene glycol dibenzoate 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, in order to overcome the shortcoming of the easy electrostatic of plastics film, with the addition of SWJU-1 static inhibitor in the fabrication process, can improve the static resistance of film, reducing the dust of surface due to electrostatic adhesion, reducing fiery residence hidden danger; The present invention simultaneously has done modification in composition proportion, first carry out hydrophobizing surface process to starch, nano imvite, sonic oscillation makes the particle diameter of starch decline, and specific surface area increases, tetrabutyl titanate and hydrophobizing agent peanut oil effectively shield starch surface hydroxyl, 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; Next utilizes ramie boon as the strongthener of Based Full-degradable Plastics Film, and have good water-fast, oil resistance, intensity is high, improves thin film strength, can be dissolved, and cost is low, turns waste into wealth after use by environment, can not produce pollution; Finally by blended for the starch-based material of polyvinyl alcohol and modification, make the film with water-fast excellent effect, can agricultural, food, industry etc. be used as, safe, solid, durable, soft, antistatic, can directly degrade in the environment after discarded.

Specific embodiments

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

There is a starch blending degradation plastic film for antistatic effect, be 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 30, dipropylene glycol dibenzoate 12, liquid calcium zinc 1.5, SWJU-1 static inhibitor 2, antioxidant 1010 1, ultra-fine medical stone 5, polyvinylpyrrolidone 2;

A kind of starch blending degradation plastic film with antistatic effect 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 mix with ultra-fine medical stone and put into nano grinder and be ground into nanoscale powder, mix with polyvinylpyrrolidone again, kneader is put into after mixing, temperature control 130 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 liquid calcium zinc, antioxidant 1010,90 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, dipropylene glycol dibenzoate 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 63.5%.Carry out Mechanics Performance Testing according to GB/T 1040.3-2006, transverse tensile strength is 26.35MPa, and elongation at break is 659.45%; Longitudinal tensile strength is 23.15 MPa, and elongation at break is 446.19%, conformance with standard.

Claims (2)

1. one kind has the starch blending degradation plastic film of antistatic effect, 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 30-35, dipropylene glycol dibenzoate 12-15, liquid calcium zinc 1.5-2, SWJU-1 static inhibitor 2-2.5, antioxidant 1010 1-2, ultra-fine medical stone 5-7, polyvinylpyrrolidone 2-3.

2. a kind of starch blending degradation plastic film with antistatic effect 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 mix with ultra-fine medical stone and put into nano grinder and be ground into nanoscale powder, mix with polyvinylpyrrolidone again, kneader is put into after mixing, temperature control 130 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 liquid calcium zinc, antioxidant 1010, 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, dipropylene glycol dibenzoate 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.