CN104892998A - Impact-resistant full-degradable plastic film and preparation method thereof - Google Patents

Abstract

The invention discloses an impact-resistant full-degradable plastic film. The invention is characterized in that the plastic film is prepared from the following raw materials in parts by weight: 30-40 parts of cassava starch, 20-30 parts of corn hide powder, 3-5 parts of brucite powder, 3-5 parts of poly(butylene succinate), 2-4 parts of acetyl tributyl citrate, 10-20 parts of polyvinyl alcohol, 15-25 parts of glycerol, 1-2 parts of silane coupling agent KH-550, 5-10 parts of maleic anhydride and 1-2 parts of calcium stearate. The full-degradable plastic film has the advantages of favorable uniformity, high tensile property, high impact resistance, favorable water resistance, wide raw material sources, low price, environment friendliness, high degradability and high practicality.

Description

A kind of shock resistance Based Full-degradable Plastics Film and preparation method thereof

Technical field

The present invention relates to wrapping material field, be specifically related to a kind of shock resistance Based Full-degradable Plastics Film and preparation method thereof.

Background technology

Plastics are widely used in the every field of economy, life, as shopping bag, refuse bag, plastic cup, disposable lunch-box in life, and the plastic sheeting for farm use etc. in production.But due to plastics be difficult to degraded, be the source of " white pollution ", cause very important negative impact to physical environment.Along with the raising of the serious and environmental protection consciousness polluted, the biodegradable plastic of product has been subjected to and has paid close attention to widely as an alternative, becomes one of effective ways solving the problem of environmental pollution that plastic refuse causes.

PVA is the polyhydroxylated polymer obtained by Vinyl Acetate Copolymer Ester hydrolysis, have in wet environment under bacterium existent condition and can decompose completely in 6 months, therefore PVA degradative plastics system has characteristic that can be degradable, is real environmental protection completely degradable plastic.But PVA material and base-material consistency poor, be separated serious, this characteristic causes PVA plastics to be difficult to processing, and Mechanical Properties of Products is also poor.Therefore, need the consistency improving PVA and base-material, improve processing characteristics and the mechanical property of PVA plastics, thus improve the quality of products.

Summary of the invention

The object of this invention is to provide a kind of shock resistance Based Full-degradable Plastics Film, shock resistance is strong, processing characteristics and good mechanical properties, is easy to degraded, environmental protection.

The present invention is achieved by the following technical solutions:

A kind of shock resistance Based Full-degradable Plastics Film, it is obtained by the raw material of following weight parts:

Tapioca (flour) 30-40, maize peel powder 20-30, brucite powder 3-5, poly butylene succinate 3-5, tributyl acetylcitrate 2-4, polyvinyl alcohol 10-20, glycerine 15-25, silane resin acceptor kh-550 1-2, maleic anhydride 5-10, calcium stearate 1-2.

A preparation method for shock resistance Based Full-degradable Plastics Film, it comprises the following steps:

(1) add the acetum of 4-8% after tapioca (flour), maize peel powder being mixed with brucite powder by solid-liquid weight ratio 1:1-1:2,60-80 DEG C is stirred 0.5-1h, obtains mixed slurry;

(2) mixed slurry in (1) added reactor and stir 1-2h in 80-90 DEG C, with 5%NaOH solution by pH regulator to 8.5-9.0, then add maleic anhydride stirring reaction 4-8h at same temperature, obtain modified slurry, in reaction process, keep pH between 8.5-9.0;

(3) pH of the modified slurry in (2) is adjusted to neutrality and dry completely, be ground to 400-600 order, obtain modified powder;

(4) first 800-1200r/min after glycerine and silane resin acceptor kh-550 mixing is stirred 10-20min, then polyvinyl alcohol and poly butylene succinate 120-140 DEG C of stirring 15-30min is added, finally add the modified powder in (3), tributyl acetylcitrate and calcium stearate high-speed mixing 10-20min, add extruding pelletization under twin screw extruder 150-170 DEG C condition, obtain film pellet;

(5) the film pellet in (4) is formed plastic film by inflation film manufacturing machine blowing, finally get product after cutting, bundling, packaging.

Advantage of the present invention is:

Base-material is mixed to form at tapioca (flour) and maize peel powder, brucite powder, and improved the interface compatibility of base-material and polyvinyl alcohol, poly butylene succinate by maleic anhydride modified base-material, silane coupler modified polyvinyl alcohol, poly butylene succinate, thus improve processing characteristics and the mechanical property of matrix material; And composite in conjunction with raw materials such as tributyl acetylcitrates, make the film uniformity that obtains good, tensile property is high, and shock resistance is strong, and water tolerance is better, and raw material sources are extensive simultaneously, and cheap, environmental protection, degradation property is good, practical.

Embodiment

Non-limiting examples of the present invention is as follows:

A kind of shock resistance Based Full-degradable Plastics Film, is prepared from by the component raw material of following weight (kg):

Tapioca (flour) 35, maize peel powder 25, brucite powder 4, poly butylene succinate 4, tributyl acetylcitrate 3, polyvinyl alcohol 15, glycerine 20, silane resin acceptor kh-550 1.5, maleic anhydride 8, calcium stearate 1.5.

The preparation method of shock resistance Based Full-degradable Plastics Film comprises the following steps:

(1) add the acetum of 8% after tapioca (flour), maize peel powder being mixed with brucite powder by solid-liquid weight ratio 1:1,80 DEG C are stirred 0.5h, obtain mixed slurry;

(2) mixed slurry in (1) added reactor and stir 1h in 80 DEG C, with 5%NaOH solution by pH regulator to 8.5-9.0, then add maleic anhydride stirring reaction 6h at same temperature, obtain modified slurry, in reaction process, keep pH between 8.5-9.0;

(3) pH of the modified slurry in (2) is adjusted to neutrality and dry completely, be ground to 600 orders, obtain modified powder;

(4) first 1200r/min after glycerine and silane resin acceptor kh-550 mixing is stirred 10min, then polyvinyl alcohol and poly butylene succinate 140 DEG C stirring 15min is added, finally add the modified powder in (3), tributyl acetylcitrate and calcium stearate high-speed mixing 10min, add extruding pelletization under twin screw extruder 150-170 DEG C condition, obtain film pellet;

(5) the film pellet in (4) is formed plastic film by inflation film manufacturing machine blowing, finally get product after cutting, bundling, packaging.

Carry out performance test to above-mentioned obtained Based Full-degradable Plastics Film, test result is as follows:

Tensile strength (MPa): 57.8;

Elongation at break: 49.4%;

Water-intake rate: 25.8%;

100d degradation rate: 23.9%.

Claims (2)

1. a shock resistance Based Full-degradable Plastics Film, is characterized in that, it is obtained by the raw material of following weight parts:

Tapioca (flour) 30-40, maize peel powder 20-30, brucite powder 3-5, poly butylene succinate 3-5, tributyl acetylcitrate 2-4, polyvinyl alcohol 10-20, glycerine 15-25, silane resin acceptor kh-550 1-2, maleic anhydride 5-10, calcium stearate 1-2.

2. the preparation method of a kind of shock resistance Based Full-degradable Plastics Film according to claim 1, is characterized in that, comprise the following steps:

(1) add the acetum of 4-8% after tapioca (flour), maize peel powder being mixed with brucite powder by solid-liquid weight ratio 1:1-1:2,60-80 DEG C is stirred 0.5-1h, obtains mixed slurry;

(2) mixed slurry in (1) added reactor and stir 1-2h in 80-90 DEG C, with 5%NaOH solution by pH regulator to 8.5-9.0, then add maleic anhydride stirring reaction 4-8h at same temperature, obtain modified slurry, in reaction process, keep pH between 8.5-9.0;

(3) pH of the modified slurry in (2) is adjusted to neutrality and dry completely, be ground to 400-600 order, obtain modified powder;

(4) first 800-1200r/min after glycerine and silane resin acceptor kh-550 mixing is stirred 10-20min, then polyvinyl alcohol and poly butylene succinate 120-140 DEG C of stirring 15-30min is added, finally add the modified powder in (3), tributyl acetylcitrate and calcium stearate high-speed mixing 10-20min, add extruding pelletization under twin screw extruder 150-170 DEG C condition, obtain film pellet;

(5) the film pellet in (4) is formed plastic film by inflation film manufacturing machine blowing, finally get product after cutting, bundling, packaging.