CN1114653C

CN1114653C - Biologically degradable resin composition and its preparation and application

Info

Publication number: CN1114653C
Application number: CN00100127A
Authority: CN
Inventors: 李小鲁
Original assignee: Individual
Current assignee: Beijing Hua Shi Bo Degradation Material Co Ltd; Li Xiaolu
Priority date: 2000-01-12
Filing date: 2000-01-12
Publication date: 2003-07-16
Anticipated expiration: 2020-01-12
Also published as: CN1267680A

Abstract

本发明涉及一种基本上可生物降解的含淀粉树脂组合物及其制备方法和应用，该组合物包含高含量淀粉、茂金属聚烯烃、EAA、及添加剂和助剂组成。组合物可由直接法和母粒料法制备。该组合物用于制造吹塑制品、挤塑制品、注塑制品及发泡制品。本发明组合物采用性能优异茂金属聚烯烃，淀粉含量及附助可生物降解组分高；物理机械性能及可生物降解性都明显高于采用齐格勒—纳塔型聚烯烃的可降解树脂组合物。The invention relates to a substantially biodegradable starch-containing resin composition and its preparation method and application. The composition comprises high-content starch, metallocene polyolefin, EAA, additives and auxiliary agents. Compositions can be prepared by direct and masterbatch methods. The composition is used for making blow molded products, extruded products, injection molded products and foamed products. The composition of the present invention adopts metallocene polyolefins with excellent performance, high starch content and auxiliary biodegradable components; physical and mechanical properties and biodegradability are significantly higher than those of degradable resins using Ziegler-Natta type polyolefins combination.

Description

Biodegradable resin combination and its production and application

The present invention relates to a kind of biodegradable resin combination and its production and application, particularly relate to amyloid resin combination of a kind of fully biodegradable basically and its production and application.

Development of modern industry, the particularly develop rapidly of petrochemical complex, for industrial and agricultural production and people's daily living article provide excellent performance, cheap synthetic resins and plastics, especially plastics film and foam plastic product use in a large number, promote the industrial and agricultural production development and greatly enriched people's material life, yet the offal treatment after using is not good at, abandon the edge of a field arbitrarily, the river, hill, place such as street corner and park, environment for human survival is caused severe contamination, cause one of current social maximum public hazards " white pollution ", caused people's extensive concern.In recent years, make laws one after another in countries in the world, the use of restriction plastics film and porous plastics; Simultaneously, biodegradable resin of development research and plastics energetically.

GB2058808 and US4293539 disclose a kind of resin combination, and said composition adopts the polymkeric substance of the alcohol ester with biodegradable or their multipolymer, as the degraded composition of PHB (poly 3-hydroxy butyrate) as composition.The advantage of this class material is can be fully by biological degradation, but because the source of raw material and the restriction of synthetic method, this series products price is very expensive, be several times even tens times of common plastics, and when making film, unit elongation is little, and product is crisp.Thereby only be suitable for having the purposes of particular requirement.

WO9102023 discloses a kind of resin combination, and said composition adopts starch and wetting ability synthetic resins such as polyvinyl alcohol, and ethylene-vinyl alcohol copolymer and other additive make.The biodegradable of this based resin composition is good, but its water resisting property is bad, and the performance of product is subjected to the influence of ambient moisture very big, and poor processability.

EP0409789A2 discloses a kind of resin combination, said composition is with starch, polyethylene, the ethylene vinyl acetate increasing component, softening agent etc. make starch pasting having under the condition that adds water, make polyethylene simultaneously, ethylene vinyl acetate is blend with it, extrude excessive moisture after, granulation gets Degradable Starch Resin.The characteristics of this method are that gelatinization, the blend of starch once finished, and make the application of starch become possibility.But the Degradable Starch Resin of this method processing, starch content wherein is not high, and when starch content was higher than 25%, the product mechanical property was bad, and the processing of its goods and use are subjected to the influence of humidity very big.When blowing out film, can not obtain thin film, transparency is bad again.Test shows that by the film that this method obtains, thickness is more than 50 microns, and very fast embrittlement after storing in the exsiccant environment, unit elongation sharply descends, and thermalization is very poor.Electron microscope observation finds, starch is dispersed in granularity in the polyethylene between the 30-50 micron, and is dispersed bad.Starch is a kind of strong polar molecule material, all has extremely strong hydrogen bond with intramolecularly between the molecule, and polyvinyl resin then is a kind of nonpolar polymkeric substance, and the consistency of therefore improving starch and polyvinyl resin is the key of this technology.In addition, this blend is when being processed into goods, because starch and synthetic resins is mobile different, blows and is prone to the hole when approaching.

Chinese patent CN1113918A discloses a kind of " Biodegradable composition and its production and application ".In this patent application, the starch that contains 15-68% (weight), the ethylene-acrylic acid copolymer of 5-20% (weight), the polyvinyl resin of 10-60% (weight), surplus is that increasing component, softening agent, alkaline additive and a spot of microorganism are as biodegradation promotor.In this resin combination, the mechanical and physical performance of the addition of starch, the goods that made by this resin combination and biodegradable are compared with like product of the prior art all in various degree improvement.But the microorganism of adopting in this patent application is as biodegradation promotor, be subjected to the influence of the processing conditions of resin and technology very big, and the variation of envrionment conditions is also very big to the influence of resin.In addition, though the influence of the characterization of molecules of polyolefin resin to the preparation of resin blend also noticed in this patent application, but it is just from improving the starch addition, increase Degradable Starch Resin combined physical mechanical property, particularly improving its tearing toughness angle sets out, from the polyolefin resin of routine, select polyolefin resin, and the goods that made by described resin combination are at low-temperature heat-sealing with specific molecular feature, extensibility, a piece of wood serving as a brake to halt a carriage, shock-resistance, easily aspects such as perviousness and degradation property can't satisfy the more and more higher requirement to plastics especially plastic membrane product fully.

As mentioned above, in the prior art, can't obtain the resin combination of the good fully biodegradable basically of low, biodegradable performance of cost and application performance, especially basically the amyloid resin combination of fully biodegradable.

The objective of the invention is to provide a kind of resin combination of fully biodegradable basically, particularly a kind of amyloid resin combination of fully biodegradable basically for the shortcoming that overcomes prior art.

Another object of the present invention provides a kind of resin combination for preparing described fully biodegradable basically of the present invention, the method for the amyloid resin combination of particularly described fully biodegradable basically.

Another object of the present invention provides the resin combination by described fully biodegradable basically of the present invention, the goods that the amyloid resin combination of particularly described fully biodegradable basically makes.

According to one aspect of the present invention, the present invention relates to a kind of biodegradable basically amyloid resin combination, described composition comprises:

15-65% (weight) starch;

3-15% (weight) polyvalent alcohol;

3-20% (weight) ethylene acrylate copolymer;

8-12% (weight) additive salt;

0-10% (weight) plant powder;

8-60% (weight) polyolefin resin;

Other auxiliary agent of 0-5% (weight).

According to another aspect of the present invention, the invention provides a kind of preparation method of biodegradable starch-containing resin combination basically, described method comprises direct method and master batch method.

According to another aspect of the present invention, the invention provides resin combination, the goods that the amyloid resin combination of particularly described fully biodegradable basically makes by described fully biodegradable basically of the present invention.

The invention provides a kind of biodegradable basically starch-containing resin combination, said composition comprises:

15-65% (weight) starch;

3-15% (weight) polyvalent alcohol;

3-20% (weight) ethylene acrylate copolymer (EAA);

8-12% (weight) additive salt;

0-10% (weight) plant powder;

8-60% (weight) polyolefin resin;

Other auxiliary agent of 0-5% (weight).

According to composition of the present invention, wherein said starch is W-Gum, yam starch, sweet potato starch, tapioca (flour), wheat class and legume starch etc. and treated starch thereof, is preferably granularity greater than 100 orders, water content above-mentioned each kind of starch and the treated starch thereof below 12% (weight).More preferably above-mentioned each amyloid treated starch.Its consumption will be according to various product propertiess and degradation property requirement, with respect to the 15-65% (weight) of composition total weight.The resin combination starch addition that for example is used for making the film class is lower than other goods contents of starch, as 35% (weight).

According to composition of the present invention, wherein said polyvalent alcohol is the incomplete esterification products of ethylene glycol, glycol ether, propylene glycol, glycerine, Sorbitol Powder or its lower molecular weight condenses (molecular weight＜400), tetramethylolmethane or longer chain fatty acid such as glyceryl monostearate etc., preferably glycerine, Sorbitol Powder and tetramethylolmethane.These polyvalent alcohols add can promote consistency between the each component, and especially polyolefine and each component consistency are improved biodegradable and processibility.Described polyvalent alcohol can use separately or be used more than two kinds, preferably is used, and its consumption is the 3-15% (weight) of composition total weight.

According to composition of the present invention, wherein said additive salt is stearate, lime carbonate, Calcium hydrogen carbonate, light calcium carbonate and the oyster shell whiting etc. of alkylsulfonate, organic acid molysite, polyhydroxybutyrate salt, stearates such as Ca, Mg, Zn, Ba, Ce and Fe.Be preferably the stearate of hard acid salt such as Ca, Zn, Fe.This class additive can improve product size stability, brightens and reduce the cost, and can promote the product biological degradation property again.Described additive can use separately or be used more than two kinds, is preferably two kinds and is used, the 8-12% (weight) of the relative composition total weight of its consumption.

According to composition of the present invention, wherein said plant powder is wood powder, bajiao banana powder and cane powder etc., is preferably wood powder, and its consumption is the 0-8% (weight) of composition total weight.

According to composition of the present invention, wherein said polyolefin resin is the polyolefin resin of new generation (hereinafter to be referred as metallocene-polyolefin or metallocene PE etc.) with metallocene catalysts, the for example homopolymer of ethene and multipolymer such as new LDPE (film grade) (LDPE), high density polyethylene(HDPE) (HDPE), LLDPE (LLDPE); The homopolymer of propylene and multipolymer such as isotatic polypropylene (PP), syndiotactic polypropylene (S-PP), and binary or ternary ethylene-propylene copolymer etc.

Polyolefin resin with metallocene catalysts is the polyolefin resin of new generation of the nineties exploitation suitability for industrialized production.This polyolefin resin is different with the polyolefine (being called for short Ziegler---Natta type polyolefine or common polyolefine) of traditional ziegler-natta type catalyst preparation on microtexture, have narrower molecular weight and molecular composition and distribute, and branching distributes; Different on cooling and crystallization property, promptly present the difference of solid-state structure; And but production density is striden basic, normal, high scope (0.900-0.965g/cm ³) each kind, so have following excellent properties: have excellent physical strength such as high impact, high-tear strength, high environmental stress crack resistance, be two times to three times of conventional ziegler-natta LLDPE; The good transparency makes the mist degree of film and gloss very good; The fusing point of resin is lower, makes to have good low-temperature heat-sealing, and film can be sealed at low temperatures; The content of lower molecular weight and low-density polymer is low in the resin, so have good opening performance; And excellent formability can wait.

Amyloid resin combination of the present invention adopts the metallocene-polyolefin resin, the low-temperature heat-sealing of the membrane product that is made by resin combination of the present invention is greatly improved: because amyloid resin combination is when heat-sealing, temperature is low then can't to be sealed, temperature is too high then decomposes and more difficult heat-sealing, the present invention utilizes the low-temperature heat-sealing of the excellence of metallocene-polyolefin resin, promptly compare with ziegler-natta LLDPE, has lower fusing point, its initial heat-sealing temperature (rising with the resin density increase) is 102-125 ℃, and ziegler-natta type is 125～139 ℃, and the process velocity raising, the performance of goods also obtains very big improvement; The basic inextensibility of starch, past is to utilize auxiliary agent and adjustment complete processing to solve this problem generally speaking, but have high input and effect is bad, owing to utilize the high-tear strength of metallocene-polyolefin resin excellence, high environmental stress cracking and shock-resistant and paracentesis resistance, for example tensile strength improves 20%-40%, paracentesis resistance improves 60%, and product wall thickness can reduce 15%-20%.Adopt this polyolefin resin can improve these physicalies of amyloid resin combination greatly; The resin combination of high-content of starch, if adopt common polyolefine generally speaking, resin can't contain starch fully, and has good pardon to starch with the metallocene-polyolefin resin, makes resin combination have the favorable mechanical physicals again simultaneously; Can add more easily degraded component (as starch and the attached thing of joining thereof), improve the degradable performance of goods, thereby reduced the environmental pollution degree.

The metallocene-polyolefin resin that is adopted in the resin combination of the present invention comprises that the trade names of for example Mitsui oiling company production are that the trade names that EVOLUE and american exxon chemical company produce are the metallocene-polyolefin resin of EXXPOL, ultra-low density polyethylene for example, linear low density polyethylene or super tough MLLDPE and ternary ethylene-propylene copolymer, and the metallocene-polyolefin of Mobil company and Britain BP company etc.

Polyolefin resin described in the composition of the present invention mainly is to adopt the metallocene-polyolefin resin, but also can be according to the requirement of goods varieties and characteristics with from cost consideration, outside keeping characteristics of the present invention, for example HDPE, PP and regeneration PE and polystyrene (PS) are used with the metallocene-polyolefin resin can to adopt some ziegler-natta type polyolefin resines in right amount, if when for example resin combination of the present invention being used for making foam materials or goods, preferably adopt metallocene PE and PS to use with.

Resin combination of the present invention can require also can comprise other auxiliary agent of 0-5% (weight) according to variant production.Described other auxiliary agent comprises oxidation inhibitor, light (heat) stablizer, antifogging agent, fire retardant, static inhibitor, coupling agent, whipping agent, tinting material, lubricant etc.For example in order to prevent and to suppress starch and compounding aid and resin alloy system thereof in the course of processing or in the use, because light, heat, oxygen, factor such as microorganism or bacterium causes too early degraded, particularly in degradative plastic film uses, control effectively and delay superpolymer autoxidation speed, or effectively suppress or slow down ultraviolet solarization etc., thereby reach effective author's preface control mulch film cracking phase (inductive phase), add oxidation inhibitor for example oxidation inhibitor four (3-(3 ', 5 '-di-t-butyl-4 '-its phenyl of hydroxyl) propionic acid pentaerythritol ester (abbreviation antioxidant 1010), thio-2 acid SUNSOFT Q-182S (being called for short oxidation inhibitor DSTP), contain the thioesters class, phosphorous acid esters, or composite antioxidant PKY, dihydroxyphenyl propane etc.; Between the general 0.5-1% of usage quantity (weight); Light (heat) stablizer is UV-series product such as Alpha-hydroxy 4-oxy-octyl benzophenone (being called for short UV531) for example, carbon black, organic tin is dibutyl tin laurate, the different monooctyl ester diformazan of dithioglycol ester group ethylidene tin (being called for short ester group tin) and ester group tin RWS-784, two (the different monooctyl ester of sulfo-glycolic acid) dioctyltin (being called for short capital tin 8831), two toxilic acid dibutyl tins, the different monooctyl ester dibutyl tin of sulfo-glycol, trisnonyl phenyl phosphite (TNPP), epoxy soybean wet goods for example, these auxiliary agents cooperate can play synergistic effect, and result of use is better.As resin combination of the present invention is made foaming product, need to add whipping agent such as urea, water and aliphatic hydrocarbon or halohydrocarbon etc.

The invention still further relates to the application of starch-containing resin combination of the present invention, equipment such as blow moulding equipment, extrusion apparatus and the injection-moulding device of conventional LDPE of its available processing and HDPE are processed into various plastics, for example blow-molded article as agricultural mulching or packing bag etc.; Extruded product as pallet, food box and beverage cup etc.; Injection-molded item as flowerpot, knife and fork/chopsticks, toy etc.; Foaming product and foam material etc., product have favorable mechanical performance and biodegradable performance.

The present invention preparation method of the amyloid resin combination of fully biodegradable basically comprises direct method and master batch method.

Described direct method comprises the following steps:

1, with powder in the above-mentioned composition and liquid material, add uniform mixing in the homogenizer according to the above ratio, heater temperature is controlled at 50-60 ℃, 10-15 minute blended under agitation time.

2, polymer material is stirred in stirring mixer according to the above ratio mixing.

3, with

step

1 and 2 and compound to send into length-to-diameter ratio by powder feeding device, pellet feeder respectively be 44-48: 1, maximum 900-1200 rev/min of screw speed, 90-125 ℃ respectively of each zone temperatures, 115-145 ℃, 130-170 ℃, 130-170 ℃, 110-140 ℃, extruding pelletization gets product in 105-155 ℃ the twin screw extruder.

Described mother material may further comprise the steps:

1, with whole starch and batching thereof in the above-mentioned composition and part fluoropolymer resin material, being added to length-to-diameter ratio by feeder is 44-48: 1, maximum 900-1200 rev/min of screw speed, 90-125 ℃ respectively of each zone temperatures, 115-145 ℃, 130-170 ℃, 130-170 ℃, 110-140 ℃, extruding pelletization gets master batch in 105-155 ℃ the twin screw extruder.

2, will obtain master batch material in the step 1, process uniform mixing, granulation with all the other fluoropolymer resins in derived product again, get degradable resin composition pellet, or be processed into goods.

The amyloid resin combination of fully biodegradable basically of the present invention adopts the metallocene-polyolefin with excellent properties that the physical mechanical strength of biologically degradable starch-containing resin combination fundamentally is provided, thereby increase starch and attached content of joining the easily degraded component of thing thereof greatly, for example up to 60% (weight), starch content is usually in 35% (weight) in the agricultural mulching, its physical and mechanical properties surpasses the physical and mechanical properties index of existing mulch film, for example agricultural mulching tensile strength (vertical/horizontal stroke)=26Mpa/21Mpa; Elongation at break (vertical/horizontal stroke)=650%/480%; Angle tear strength (vertical/horizontal stroke)=90N/110N.Biologically degradable starch-containing resin combination of the present invention is used for agricultural mulching and cooperates auxiliary agents such as an amount of oxidation inhibitor through selecting, light (heat) stablizer, make this kind agricultural mulching not only have biodegradable function, to slow down " white pollution ", can make degraded controlled effective freely inductive phase according to when geographic climatic characteristic and the different requirements of various crop growth simultaneously.As mentioned above, the component content height owing to easily degrade in the resin combination of the present invention, becoming the starch-containing resin combination of fully biodegradable basically, is example with area, Hebei agricultural mulching: mulch film plays good insulation, soil moisture conservation effect after carrying out the crop covering March 15.Owing to add 1% (weight) carbon black, play the absorption heat, increase accumulated temperature effect (on average exceeding common ground film 2-3 ℃), and can suppress weed growth.After 65-75 days, degradative plastic film begins to occur breach (being control inductive phase) phase, Large Area Cracking occurs again after 15-20 days, successively fragmentation, efflorescence (120-180 days) occur then, and a part becomes superfine powder (cornmeal mush) shape, and a part is converted into H ₂O and CO ₂, the mulch film after the degraded was degraded into powdered in 5-8 month, through the continuation degraded in 1 year, can not see remaining mulch film when plough in the spring the coming year substantially fully.The effect of increasing production of Biodegradable agricultural mulch film of the present invention is obvious, and the average yield per mu corn exceeds 30-50Kg than similar general mulch film.

By the following examples to further instruction of the present invention and explanation.But it should be understood that these embodiment do not constitute limiting the scope of the invention.

Embodiment 1

Agricultural mulching:

Composite formula (prescription is weight part in the example)

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate	35	6	4	0.8	0.1	0.3	0.3
1010	UV-531	EAA	Metallocene PE	DSTP	Ultra-fine carbon black	-	35	6	4	0.8	0.1	0.3	0.3
1010	UV-531	EAA	Metallocene PE	DSTP	Ultra-fine carbon black	-	0.5	0.6	10.0	41	0.8	1	-

With powder in the above-mentioned prescription and liquid material starch, Sorbitol Powder, glycerine, epoxy soybean oil, oleic acid, Zinic stearas, calcium stearate, 1010, UV-531, DSTP and ultra-fine carbon black, be added in the homogenizer in ratio (weight part) in the above-mentioned prescription and evenly mix, heater temperature is controlled at 50-60 ℃, about 15 minutes of mixing time.EAA and metallocene PE are stirred in mixing tank in ratio in the above-mentioned prescription.

With above-mentioned two kinds of compounds respectively by L: D=44: the powder feeding device and the pellet feeder of 48: 1 twin screw extruder are sent in the twin screw extruder, screw speed 380-410rpm, each zone temperatures is respectively: 145,155,165,160,150,155, vacuum tightness-0.6Mpa carries out extruding pelletization and gets granule product.

Pellet index: MI=2.3, density=1.08 gram per centimeters ³, moisture=0.8% (weight).

The film index: tensile strength (vertical/horizontal stroke)=26Mpa/21Mpa,

Elongation at break (vertical/horizontal stroke)=650%/480%, angle tear strength (vertical/horizontal stroke)=90N/110N.

This mulch film begins breach through (about 65-75 days) mulch film after stationary phase after being used for the crop covering, again through 15-20 days mulch film Large Area Cracking, occurs fragmentation, efflorescence (120-180 days) then, and a part becomes superfine little powder, and a part is converted into H ₂O and CO ₂, through the continuation degraded in 1 year, the coming year, remaining mulch film was can not see in spring ploughing basically fully.

Comparative example 1

Component is identical with content in comparative example 1 and embodiment 1 prescription, and batching, granulation, blow molding process step condition are identical, are not both with common (Ziegler-natta catalyst) polyethylene replacement metallocene PE; Degradation experiment envrionment conditions identical (adopting U.S. ASTM D5247 standard), its tensile strength, elongation at break, the comparison of angle tear strength and degradation property such as Fig. 1-1--1-4, I type curve is for using common polythene ground membrane product among the figure, II type curve is for using metallocene PE ground membrane product, and QB is the company standard curve.

As seen from the figure, be much higher than the physical and mechanical properties of using common polythene (Ziegler-Natta polyethylene) with the physical and mechanical properties of the amyloid resin combination of the present invention of metallocene PE, degradation property still is better than common polythene.

Comparative example 2

Comparative example 2 is identical with embodiment 1 processing step, and it is as follows to fill a prescription,

Starch=25 weight parts, the I type,

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate	25	7	5	0.7	0.1	0.2	0.2
Stearic acid	Common PE	EAA	Metallocene PE	Maleic anhydride	Boric acid	-	25	7	5	0.7	0.1	0.2	0.2
Stearic acid	Common PE	EAA	Metallocene PE	Maleic anhydride	Boric acid	-	1.8	20	12	25	2	1	-

Starch=45 weight part II

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Calcium stearate	45	3	2	0.5	0.2	0.5
Calcium stearate	Zinic stearas	Maleic anhydride	Boric acid	EAA	Metallocene PE	45	3	2	0.5	0.2	0.5
Calcium stearate	Zinic stearas	Maleic anhydride	Boric acid	EAA	Metallocene PE	0.2	0.2	0.2	0.2	15	33

Degraded testing circumstance conditionally complete identical (adopting U.S. ASTM-D5247 standard), the comparison of its tensile strength, elongation at break, angle tear strength and degradation property such as Fig. 2-1-2-4, the I type is starch content=25 weight parts among the figure, and II type starch content=45 weight parts, QB are company standard.

As seen from the figure, under the roughly the same situation of physical and mechanical properties, use metallocene PE can add more degradable components (starch), so easily degraded, so biodegradable is much better than the starch-containing composition that adopts the common PE resin, illustrates that the present invention adopts the starch-containing resin combination biodegradable of metallocene PE better.

Embodiment 2-38

Implementing 2-12 is the mulch film composite formula

Mulch film

2

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate	25	7	5	0.7	0.1	0.2	0.2
1010	RWS-784	EAA	Metallocene PE	-	UV-531	Ultra-fine carbon black	25	7	5	0.7	0.1	0.2	0.2
1010	RWS-784	EAA	Metallocene PE	-	UV-531	Ultra-fine carbon black	0.4	1	14	45.4	-	0.2	0.8

3

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate	35	5.5	3.5	1.5	-	0.2	0.2
Stearic acid	Jing Xi-8831	EAA	Metallocene PE	-	Dihydroxyphenyl propane	Ultra-fine carbon black	35	5.5	3.5	1.5	-	0.2	0.2
Stearic acid	Jing Xi-8831	EAA	Metallocene PE	-	Dihydroxyphenyl propane	Ultra-fine carbon black	-	1.4	18	33.7	-	0.5	0.5

Light packing film

4

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate	20	7	5	2	1	0.25	0.25
Stearic acid		EAA	Metallocene PE	-	Maleic anhydride	Boric acid	20	7	5	2	1	0.25	0.25
Stearic acid		EAA	Metallocene PE	-	Maleic anhydride	Boric acid	0.5		8	53	-	2	1

5

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate	30	6	4	1.5	1	0.25	0.25
Stearic acid		EAA	Metallocene PE	-	Maleic anhydride	Boric acid	30	6	4	1.5	1	0.25	0.25
Stearic acid		EAA	Metallocene PE	-	Maleic anhydride	Boric acid	0.5		12	40.5	-	2.5	1.5

6

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate	40	5	3	2	1	0.25	0.25
Stearic acid		EAA	Metallocene PE	-	Maleic anhydride	Boric acid	40	5	3	2	1	0.25	0.25
Stearic acid		EAA	Metallocene PE	-	Maleic anhydride	Boric acid	0.5	-	17	28	-	2	1

7

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate	20	7	5	2	1	0.25	0.25
Stearic acid	Refuse bag adds regeneration PE	EAA	Metallocene PE	-	Maleic anhydride	Boric acid	20	7	5	2	1	0.25	0.25
Stearic acid	Refuse bag adds regeneration PE	EAA	Metallocene PE	-	Maleic anhydride	Boric acid	0.5	10	8	43	-	2	1

8

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate	30	6	4	1.5	1	0.25	0.25
Stearic acid	HDPE	EAA	Metallocene PE	-	Maleic anhydride	Boric acid	30	6	4	1.5	1	0.25	0.25
Stearic acid	HDPE	EAA	Metallocene PE	-	Maleic anhydride	Boric acid	0.5	10.5	12	30	-	2.5	1.5

9

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate	40	5	3	2	1	0.25	0.25
Stearic acid	HDPE	EAA	Metallocene PE	-	Maleic anhydride	Boric acid	40	5	3	2	1	0.25	0.25
Stearic acid	HDPE	EAA	Metallocene PE	-	Maleic anhydride	Boric acid	0.5	5	17	24.5	-	1	0.5

The specific function film

10

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate	20	7	5	2	1	0.25	0.25
Stearic acid	Metallic aluminium powder 〉=300 orders	EAA	Metallocene PE	HDPE	Maleic anhydride	Boric acid	20	7	5	2	1	0.25	0.25
Stearic acid	Metallic aluminium powder 〉=300 orders	EAA	Metallocene PE	HDPE	Maleic anhydride	Boric acid	0.5	10	8	41	2	2	1

11

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate	30	6	4	1.5	1	0.25	0.25
Stearic acid	Metallic aluminium powder 〉=300	EAA	Metallocene PE	-	Maleic anhydride	Boric acid	30	6	4	1.5	1	0.25	0.25
Stearic acid	Metallic aluminium powder 〉=300	EAA	Metallocene PE	-	Maleic anhydride	Boric acid	0.5	5	12	37.5	-	1	1

12

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate	40	4	2	2	1	0.25	0.25
Stearic acid	Metallic aluminium powder 〉=300 orders	EAA	Metallocene PE	-	Maleic anhydride	Boric acid	40	4	2	2	1	0.25	0.25
Stearic acid	Metallic aluminium powder 〉=300 orders	EAA	Metallocene PE	-	Maleic anhydride	Boric acid	0.5	5	17	26.5	-	1	0.5

The blown film class

Project	Requirement	Measured data
Project	Requirement	Measured data	Outward appearance	Light yellow particle, free from extraneous odour, differently smell, foreign matter
Starch content %	≥25		Outward appearance
Starch content %	≥25		Water content %	≤1.2	0.48～1.10
Melt flow rate (MFR) g/10min	2.0±0.5		Water content %	≤1.2	0.48～1.10
Melt flow rate (MFR) g/10min	2.0±0.5		Tensile strength (vertical/horizontal stroke) Mpa	≥14	15～32
Elongation at break (vertical/horizontal stroke) %	＞250	300～720	Tensile strength (vertical/horizontal stroke) Mpa	≥14	15～32
Elongation at break (vertical/horizontal stroke) %	＞250	300～720	Angle tear strength (vertical/horizontal stroke) %	＞60	70～160
14 days % of microbiological deterioration rate	＞16		Angle tear strength (vertical/horizontal stroke) %	＞60	70～160

21 days levels of mould degraded level	≥2
21 days levels of mould degraded level	≥2	Ignition residue %	≤0.2
N-hexane extract %	≤4.0	Ignition residue %	≤0.2
N-hexane extract %	≤4.0	Potassium permanganate consumption mg/L	≤35.0

The blow molding class

Seedling-raising cup

13

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate	25	5	3	0.5	1	0.2	0.3
Stearic acid	Two lauric acid dioctyl tins	EAA	Metallocene PE	Regeneration PE	-	-	25	5	3	0.5	1	0.2	0.3
Stearic acid	Two lauric acid dioctyl tins	EAA	Metallocene PE	Regeneration PE	-	-	1	1.5	8	40	14.5

14

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate	40	7	5	1.5	1	0.2	0.3
Stearic acid	Two lauric acid dioctyl tins	EAA	Metallocene PE	Regeneration PE	-	-	40	7	5	1.5	1	0.2	0.3
Stearic acid	Two lauric acid dioctyl tins	EAA	Metallocene PE	Regeneration PE	-	-	1.5	2	15	22	3.5

15

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate	55	6	3	0.5	0.5	0.2	0.3
Stearic acid	Two lauric acid dioctyl tins	EAA	Metallocene PE	-	-	-	55	6	3	0.5	0.5	0.2	0.3
Stearic acid	Two lauric acid dioctyl tins	EAA	Metallocene PE	-	-	-	1	1	15	17.5	-	-	-

Bottle

16

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate	30	6	4	1.8	2	0.3	0.4
Stearic acid	Jing Xi-8831	EAA	Metallocene PE	-	-	-	30	6	4	1.8	2	0.3	0.4
Stearic acid	Jing Xi-8831	EAA	Metallocene PE	-	-	-	1	1.5	10	43

17

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate	40	7	5	2.5	1.5	0.2	0.3
Stearic acid	Two lauric acid dioctyl tins	EAA	Metallocene PE	-	-	-	40	7	5	2.5	1.5	0.2	0.3
Stearic acid	Two lauric acid dioctyl tins	EAA	Metallocene PE	-	-	-	1.5	2	15	25	-

18

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Oleic acid	Zinic stearas	Calcium stearate	50	5	3	1	0.5	0.2	0.3
Stearic acid	Zhi Ji Tin RWS-784	EAA	Metallocene PE	-	-	-	50	5	3	1	0.5	0.2	0.3
Stearic acid	Zhi Ji Tin RWS-784	EAA	Metallocene PE	-	-	-	1	1	18	20	-	-	-

The blow molding class

Project
Project						Seal test	Do not leak
Fall down test	Do not allow bunghole part that small amount of liquid is arranged when having breakage, the lid that do not jump, bump, afterwards must not seepage					Seal test	Do not leak
Fall down test						Hanging test	Nominal capacity, L	1～5	10～15	20～40	50～200
	The residual deformation amount, mm	≤2	≤3	≤4	Do not split	Hanging test	Nominal capacity, L	1～5	10～15	20～40	50～200
	The residual deformation amount, mm	≤2	≤3	≤4	Do not split	Stacking test	Casting not
The stress cracking test	Rimose sample number (staving, lid)＜input test sample several 50%					Stacking test	Casting not
The stress cracking test						Hydro-test	Do not have breakage, do not leak
Microbiological deterioration rate 14 days, %	＞10					Hydro-test	Do not have breakage, do not leak
Microbiological deterioration rate 14 days, %	＞10					Mould degraded level 21 days, level	〉=2 grades
Ignition residue %	≤0.2					Mould degraded level 21 days, level	〉=2 grades
Ignition residue %	≤0.2					N-hexane extract %	≤4.0

The extrusion sheet class

Pallet

19

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	TNPP	Iron stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	TNPP	Iron stearate		50	5	2	1	0.2	0.2
EAA	Metallocene PE	PP	Ferrocene				50	5	2	1	0.2	0.2
EAA	Metallocene PE	PP	Ferrocene			15	20	6	0.6

Food box series

20

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	TNPP	Iron stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	TNPP	Iron stearate	40	5	2.5	0.5	0.3	0.3
EAA	Metallocene PE	PP	Iron stearate			40	5	2.5	0.5	0.3	0.3
EAA	Metallocene PE	PP	Iron stearate			12	30	9	0.4

Beverage cup series

21

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	TNPP	Iron stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	TNPP	Iron stearate	30	6	3	1	0.5	0.5
EAA	Metallocene PE	PP	Ferrocene			30	6	3	1	0.5	0.5
EAA	Metallocene PE	PP	Ferrocene			8	35.5	15	0.5

Industrial packaging box series

22

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	TNPP	Iron stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	TNPP	Iron stearate		60	5	3	1	0.5	0.5
EAA	Metallocene PE	PP	Dithiocarbamic acid iron				60	5	3	1	0.5	0.5
EAA	Metallocene PE	PP	Dithiocarbamic acid iron			12	12.5	5	0.5

The extrusion sheet class

Project	Requirement	Measured data
Project	Requirement	Measured data	Outward appearance	Light yellow particle, free from extraneous odour, differently smell, foreign matter
Starch content %	≥30		Outward appearance
Starch content %	≥30		Water content %	≤1.2	0.2～0.6
Melt flow rate (MFR) g/10min	3.2～5.2		Water content %	≤1.2	0.2～0.6
Melt flow rate (MFR) g/10min	3.2～5.2		Simple beam impact strength KJ/M ²	≥25
Rockwell hardness (R scale)	≥28		Simple beam impact strength KJ/M ²	≥25
Rockwell hardness (R scale)	≥28		Tensile yield strength (vertical/horizontal stroke) Mpa	≥16	18～37
Vicat softening point ℃	≥100		Tensile yield strength (vertical/horizontal stroke) Mpa	≥16	18～37
Vicat softening point ℃	≥100		14 days % of microbiological deterioration rate	≥10
21 days levels of mould degraded level	〉=2 grades		14 days % of microbiological deterioration rate	≥10
21 days levels of mould degraded level	〉=2 grades		Ignition residue %	≤0.2
N-hexane extract %	≤4.0		Ignition residue %	≤0.2

The extrusion foaming class

Pallet

23

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	TNPP	Iron stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	TNPP	Iron stearate	35	3	6	1	0.5	0.5
EAA	Metallocene PE	PS	Ferrocene	Stearic acid	Talcum powder	35	3	6	1	0.5	0.5
EAA	Metallocene PE	PS	Ferrocene	Stearic acid	Talcum powder	10	15	25.5	0.5	1	3

Cutlery box, bowl

24

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	TNPP	Iron stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	TNPP	Iron stearate	30	3	6	1	0.5	0.5
EAA	Metallocene PE	PS	Ferrocene	Stearic acid	Talcum powder	30	3	6	1	0.5	0.5
EAA	Metallocene PE	PS	Ferrocene	Stearic acid	Talcum powder	8	20	33	0.5	0.5	2.5

Foaming cloth

25

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	TNPP	Iron stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	TNPP	Iron stearate	45	7	3	2	0.5	0.5
EAA	Metallocene PE	PS	Ferrocene	Stearic acid	Talcum powder	45	7	3	2	0.5	0.5
EAA	Metallocene PE	PS	Ferrocene	Stearic acid	Talcum powder	12	28.5	-	0.5	0.5	0.5

Packing

26

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	TNPP	Iron stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	TNPP	Iron stearate	65	5	2	2	0.5	0.5
EAA	Metallocene PE	PS	Ferrocene	Stearic acid	Talcum powder	65	5	2	2	0.5	0.5
EAA	Metallocene PE	PS	Ferrocene	Stearic acid	Talcum powder	12	11.5	-	0.5	0.5	0.5

The extrusion foaming class

Project	Requirement	Measured data
Project	Requirement	Measured data	Outward appearance	Light yellow particle, free from extraneous odour, differently smell, foreign matter
Starch content %	≥25		Outward appearance
Starch content %	≥25		Water content %	≤1.0	0.2～0.8
Melt flow rate (MFR) g/10min	2.3～3.8		Water content %	≤1.0	0.2～0.8
Melt flow rate (MFR) g/10min	2.3～3.8		Simple beam impact strength KJ/M ²	≥6.0
Yield strength (vertical/horizontal stroke) Mpa	≥35	35～58	Simple beam impact strength KJ/M ²	≥6.0
Yield strength (vertical/horizontal stroke) Mpa	≥35	35～58	Vicat softening point ℃	≥90
28 days % of degrading quality rate of loss	≥35		Vicat softening point ℃	≥90
28 days % of degrading quality rate of loss	≥35		21 days levels of mould degraded level	〉=2 grades
Volatile matter %	≤1.8		21 days levels of mould degraded level	〉=2 grades
Volatile matter %	≤1.8		Weight loss on drying %	≤0.5
N-hexane extract %	≤1.5		Weight loss on drying %	≤0.5

The injection molding class

Cutter/fork/spoon/chopsticks

27

Starch	Wood powder	Sorbitol Powder	Oil	Epoxy soybean oil		TNPP		Iron stearate
Starch	Wood powder	Sorbitol Powder	Oil	Epoxy soybean oil		TNPP		Iron stearate	20	10	5	2	2		1		1
EAA		Metallocene PE	PS	Ferrocene	SBS	Stearic acid	Glass fibre	Talcum powder	20	10	5	2	2		1		1
EAA		Metallocene PE	PS	Ferrocene	SBS	Stearic acid	Glass fibre	Talcum powder	8		25	6	0.5	5	0.5	4	10

Flowerpot

28

Starch	Wood powder	Sorbitol Powder	Glycerine	Epoxy soybean oil		TNPP		Iron stearate
Starch	Wood powder	Sorbitol Powder	Glycerine	Epoxy soybean oil		TNPP		Iron stearate	30	10	6	2	1		3.5		0.5
EAA		Metallocene PE	PS	Ferrocene	SBS	Stearic acid	Glass fibre	Talcum powder	30	10	6	2	1		3.5		0.5
EAA		Metallocene PE	PS	Ferrocene	SBS	Stearic acid	Glass fibre	Talcum powder	10		15	3	0.5	2	0.5	1	8

Golf tee

29

Starch	Oyster shell whiting	Sorbitol Powder	Glycerine	Epoxy soybean oil		TNPP		Iron stearate
Starch	Oyster shell whiting	Sorbitol Powder	Glycerine	Epoxy soybean oil		TNPP		Iron stearate	30	30	7	2	1		0.5		0.5
EAA		Metallocene PE	PS	Ferrocene	SBS	Stearic acid	Glass fibre	Talcum powder	30	30	7	2	1		0.5		0.5
EAA		Metallocene PE	PS	Ferrocene	SBS	Stearic acid	Glass fibre	Talcum powder	10		13	2	0.5	-	0.5	1	2

Pet toy

30

Starch	Wood powder	Sorbitol Powder	Glycerine	Epoxy soybean oil		TNPP		Iron stearate
Starch	Wood powder	Sorbitol Powder	Glycerine	Epoxy soybean oil		TNPP		Iron stearate		60	10	3	1	6		3.5		0.5
EAA		Metallocene PE	PS	Ferrocene	SBS	Stearic acid	Glass fibre	Talcum powder		60	10	3	1	6		3.5		0.5
EAA		Metallocene PE	PS	Ferrocene	SBS	Stearic acid	Glass fibre	Talcum powder	9		8	-	0.5	-	0.5	-	1

The injection class

Project	Requirement	Measured data
Project	Requirement	Measured data	Outward appearance	Light yellow particle, free from extraneous odour, differently smell, foreign matter
Starch content %	≥45		Outward appearance
Starch content %	≥45		Water content %	≤3.0	0.9～2.8
Melt flow rate (MFR) g/10min	0.3～3.0		Water content %	≤3.0	0.9～2.8
Melt flow rate (MFR) g/10min	0.3～3.0		14 days % of microbiological deterioration rate	≥40
21 days levels of mould degraded level	〉=3 grades		14 days % of microbiological deterioration rate	≥40
21 days levels of mould degraded level	〉=3 grades		Ignition residue %	≤1.5
N-hexane extract %	≤4.0		Ignition residue %	≤1.5

The master batch addition type

Blow molding, blown film class

31

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Stearic acid	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Stearic acid	Calcium stearate		60	6	2	1	0.5	0.5
Iron stearate	RWS-784	Cerium stearate	EAA	Metallocene PE	-		60	6	2	1	0.5	0.5
Iron stearate	RWS-784	Cerium stearate	EAA	Metallocene PE	-	0.5	0.5	1	12	15	-

32

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Stearic acid	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Stearic acid	Calcium stearate		50	7	2	1	0.5	0.5
Iron stearate	RWS-784	Cerium stearate	EAA	Metallocene PE	-		50	7	2	1	0.5	0.5
Iron stearate	RWS-784	Cerium stearate	EAA	Metallocene PE	-	0.5	0.5	1	12	25	-

Extrudate piece material class

33

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Stearic acid	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Stearic acid	Calcium stearate		60	6	2	1	0.5	0.5
Iron stearate	RWS-784	Cerium stearate	EAA	Metallocene PE	PP		60	6	2	1	0.5	0.5
Iron stearate	RWS-784	Cerium stearate	EAA	Metallocene PE	PP	0.5	0.5	1	10	12	6

34

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Stearic acid	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Stearic acid	Calcium stearate		50	6	2	1	0.5	0.5
Iron stearate	RWS-784	Cerium stearate	EAA	Metallocene PE	PP		50	6	2	1	0.5	0.5
Iron stearate	RWS-784	Cerium stearate	EAA	Metallocene PE	PP	0.5	0.5	1	12	15	11

The extrusion foaming class

35

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Stearic acid	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Stearic acid	Calcium stearate		50	7	2	1	0.5	0.5
Iron stearate	RWS-784	Cerium stearate	EAA	Metallocene PE	PS		50	7	2	1	0.5	0.5
Iron stearate	RWS-784	Cerium stearate	EAA	Metallocene PE	PS	0.5	0.5	1	13	15	10

36

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Stearic acid	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Stearic acid	Calcium stearate		40	5	2	1	0.5	0.5
Iron stearate	RWS-784	Cerium stearate	EAA	Metallocene PE	PS		40	5	2	1	0.5	0.5
Iron stearate	RWS-784	Cerium stearate	EAA	Metallocene PE	PS	0.5	0.5	1	12	17	19

The injection class

37

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Stearic acid	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Stearic acid	Calcium stearate		70	6	2	1	0.5	0.5
Iron stearate	RWS-784	Cerium stearate	EAA	Metallocene PE	Wood powder		70	6	2	1	0.5	0.5
Iron stearate	RWS-784	Cerium stearate	EAA	Metallocene PE	Wood powder	0.5	0.5	1	10	5	3

38

Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Stearic acid	Calcium stearate
Starch	Sorbitol Powder	Glycerine	Epoxy soybean oil	Stearic acid	Calcium stearate		60	6	2	1	0.5	0.5
Iron stearate	RWS-784	Cerium stearate	EAA	Metallocene PE	Wood powder		60	6	2	1	0.5	0.5
Iron stearate	RWS-784	Cerium stearate	EAA	Metallocene PE	Wood powder	0.5	0.5	1	10	10	8

Annotate: the degraded test method adopts U.S. ASTMD5247, ASTMG21 standard.

SBS refers to the butylbenzene thermoplastic elastomer.

Claims

1. A biodegradable starch-containing resin composition comprising:

15-65% (weight) starch;

3-15% (weight) polyol;

3-20% (weight) ethylene acrylate copolymer;

8-12% (weight) salt additives;

0-10% (weight) vegetable powder;

8-60% (weight) polyolefin resin;

0-5% (weight) other additives.

Wherein the salt additives include alkyl sulfonates, organic acid iron salts, polyhydroxybutyrates, stearates, calcium carbonate, light calcium carbonate, calcium bicarbonate or shell powder;

The plant powder includes wood powder, plantain powder or sugarcane powder;

The other auxiliary agents include antioxidants, light/heat stabilizers, antifogging agents, flame retardants, antistatic agents, coupling agents, foaming agents, colorants or lubricants.

2. The composition as claimed in claim 1, wherein said starch is corn starch, potato starch, sweet potato starch or tapioca starch with particle size larger than 100 mesh and moisture content below 12% (weight), or their modified starch.

3. The composition of claim 1, wherein said polyhydric alcohol is sorbitol, low molecular weight condensates of sorbitol, ethylene glycol, diethylene glycol, propylene glycol, glycerol or pentaerythritol.

4. The composition of claim 3, wherein the polyol is sorbitol or glycerin.

5. The composition as claimed in claim 1, wherein said salt additive is calcium stearate, zinc stearate, magnesium stearate or barium stearate.

6. The composition as claimed in claim 1, wherein said polyolefin resin is a polyolefin resin prepared with a metallocene catalyst.

7. The composition as claimed in claim 8, wherein the polyolefin prepared by the metallocene catalyst is a binary or terpolymer of metallocene polyethylene, metallocene polypropylene or metallocene ethylene propylene.

8. The composition of claim 7, wherein the metallocene polyethylene is metallocene linear low density polyethylene or metallocene low density polyethylene.

9. The preparation method of the biodegradable starch-containing resin composition according to any one of claims 1-8, the method comprising the following steps:

(1) Add the components in the composition except the ethylene acrylate copolymer and the polyolefin resin according to the ratio of claim 1 into a high-speed mixer and mix evenly, the temperature of the heater is controlled at 50-60°C, and the mixture is stirred Blending time 10-15 minutes;

(2) Stir and mix the ethylene acrylate copolymer and the polyolefin resin in a stirring mixer according to the ratio described in claim 1;

(3) The mixed material of steps (1) and (2) is sent into by the powder feeder and the pellet feeder respectively, the ratio of length to diameter is 44-48:1, and the maximum screw speed is 900-1200 rpm, The temperature of each section is 90-125°C, 115-145°C, 130-170°C, 130-170°C, 110-140°C, 105-155°C twin-screw extruders to obtain granulated products.

10. The biodegradable starch-containing resin composition according to any one of claims 1-8 for use in the manufacture of blow-molded products, injection-molded products, extruded products or foamed products.

11. The biodegradable starch-containing resin composition according to any one of claims 1-8 is used for making agricultural mulch film or packaging film.