CN104892999A - High-water-resistance full-degradable plastic film and preparation method thereof - Google Patents

Abstract

The invention discloses a high-water-resistance full-degradable plastic film which is characterized by being prepared from the following raw materials in parts by weight: 50-60 parts of cassava starch, 5-10 parts of buckwheat shell powder, 5-10 parts of wollastonite powder, 3-5 parts of polylactic acid, 10-20 parts of polyvinyl alcohol, 15-25 parts of glycerol, 1-2 parts of a silane coupling agent KH-550, 3-5 parts of silicone acrylic emulsion, 3-5 parts of epoxidized soybean oil, 1-2 parts of polyglycerol polyricinoleate, 5-10 parts of maleic anhydride and 1-2 parts of erucyl amide. The full-degradable plastic film disclosed by the invention is good in homogeneity, high in tensile property and high in strength, and has relatively strong water resistance; and meanwhile, the raw materials are wide in source, low in price, green and environment-friendly, good in degradability and strong in practicability.

Description

A kind of high water-fast 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 high water-fast 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 high water-fast Based Full-degradable Plastics Film, water tolerance 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 high water-fast Based Full-degradable Plastics Film, it is obtained by the raw material of following weight parts:

Tapioca (flour) 50-60, Buckwheat shell powder 5-10, wollastonite powder 5-10, poly(lactic acid) 3-5, polyvinyl alcohol 10-20, glycerine 15-25, silane resin acceptor kh-550 1-2, organosilicon crylic acid latex 3-5, epoxy soybean oil 3-5, polyglycerol polyricinoleate 1-2, maleic anhydride 5-10, erucicamide 1-2.

A preparation method for high water-fast Based Full-degradable Plastics Film, it comprises the following steps:

(1) add the acetum of 4-8% after tapioca (flour), Buckwheat shell powder and wollastonite powder being mixed 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 add polyvinyl alcohol, poly(lactic acid) and epoxy soybean oil 120-130 DEG C and stir 15-30min, finally add the modified powder in (3), polyglycerol polyricinoleate, erucicamide and organosilicon crylic acid latex high-speed mixing 10-20min, add extruding pelletization under twin screw extruder 120-140 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:

Tapioca (flour) and Buckwheat shell powder, wollastonite powder are mixed to form base-material, and improved the interface compatibility of base-material and polyvinyl alcohol, poly(lactic acid) by maleic anhydride modified base-material, silane coupler modified polyvinyl alcohol, poly(lactic acid), thus improve processing characteristics and the mechanical property of matrix material; And in conjunction with organosilicon crylic acid latex, epoxy soybean wet goods raw material composite, make the film uniformity that obtains good, tensile property is high, intensity is large, and has stronger water resistance, 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 high water-fast Based Full-degradable Plastics Film, is prepared from by the component raw material of following weight (kg):

Tapioca (flour) 55, Buckwheat shell powder 8, wollastonite powder 8, poly(lactic acid) 4, polyvinyl alcohol 15, glycerine 20, silane resin acceptor kh-550 1.5, organosilicon crylic acid latex 4, epoxy soybean oil 4, polyglycerol polyricinoleate 1.5, maleic anhydride 8, erucicamide 1.5.

The preparation method of high water-fast Based Full-degradable Plastics Film comprises the following steps:

(1) add the acetum of 8% after tapioca (flour), Buckwheat shell powder and wollastonite powder being mixed 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 add polyvinyl alcohol, poly(lactic acid) and epoxy soybean oil 120 DEG C and stir 15min, finally add the modified powder in (3), polyglycerol polyricinoleate, erucicamide and organosilicon crylic acid latex high-speed mixing 10min, add extruding pelletization under twin screw extruder 120-140 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): 48.6;

Elongation at break: 38.9%;

Water-intake rate: 17.6%;

100d degradation rate: 22.1%.

Claims (2)

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

Tapioca (flour) 50-60, Buckwheat shell powder 5-10, wollastonite powder 5-10, poly(lactic acid) 3-5, polyvinyl alcohol 10-20, glycerine 15-25, silane resin acceptor kh-550 1-2, organosilicon crylic acid latex 3-5, epoxy soybean oil 3-5, polyglycerol polyricinoleate 1-2, maleic anhydride 5-10, erucicamide 1-2.

2. the preparation method of a kind of high water-fast 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), Buckwheat shell powder and wollastonite powder being mixed 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 add polyvinyl alcohol, poly(lactic acid) and epoxy soybean oil 120-130 DEG C and stir 15-30min, finally add the modified powder in (3), polyglycerol polyricinoleate, erucicamide and organosilicon crylic acid latex high-speed mixing 10-20min, add extruding pelletization under twin screw extruder 120-140 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.