CN110356064A - Stretched film is obstructed in a kind of biology base - Google Patents

Stretched film is obstructed in a kind of biology base Download PDF

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Publication number
CN110356064A
CN110356064A CN201910490009.8A CN201910490009A CN110356064A CN 110356064 A CN110356064 A CN 110356064A CN 201910490009 A CN201910490009 A CN 201910490009A CN 110356064 A CN110356064 A CN 110356064A
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Prior art keywords
layer
additive
resin
degradation
internal
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CN201910490009.8A
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Chinese (zh)
Inventor
刘文海
钟玉玲
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Green Plastic Kang (tianjin) Environmental Protection Technology Co Ltd
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Green Plastic Kang (tianjin) Environmental Protection Technology Co Ltd
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Priority to CN201910490009.8A priority Critical patent/CN110356064A/en
Publication of CN110356064A publication Critical patent/CN110356064A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/14—Layered products comprising a layer of synthetic resin next to a particulate layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/16—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer formed of particles, e.g. chips, powder or granules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/104—Oxysalt, e.g. carbonate, sulfate, phosphate or nitrate particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/716—Degradable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/716—Degradable
    • B32B2307/7163—Biodegradable

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention belongs to obstruct stretched film, including surface layer, middle layer, internal layer in biology base degradation technique field more particularly to a kind of biology base；The surface layer includes surface layer resin layer, surface layer additive layer, and the surface layer resin layer is modification biological base polyester binding (SHQ-GTIE) resin, and the surface layer additive layer is oxygen-containing resin controlled degradation (YZZJ) additive；The middle layer includes middle layer resin layer, middle layer additive layer, the middle layer additive layer is located at the lower section of middle layer resin layer, the middle layer resin layer is oxidative biological controlled degradation (YHSZ) resin, and the middle layer additive layer is environment controlled degradation (HJZJ) additive；The internal layer includes inner layer resin layer, internal layer additive layer, the internal layer additive layer is located at the lower section of inner layer resin layer, the inner layer resin layer is PVA biology base controlled degradation (PVSZ) resin, and the internal layer additive layer is oxidative biological base controlled degradation (YSZJ) additive.

Description

Stretched film is obstructed in a kind of biology base
Technical field
The invention belongs to obstruct stretched film in biology base degradation technique field more particularly to a kind of biology base.
Background technique
With economic rapid development, people get worse the destruction of environment, especially nondegradable plastics, by people Arbitrarily throw out without care after, due to being not easy to be deposited in soil for a long time by soil microbial degradation, caused to ecological environment serious Pollution.Disposable tableware, Phthalates and agricultural mulching etc. are difficult to be recycled, traditional processing method with Based on burning and burying.Burning can generate a large amount of pernicious gas, pollute environment；It buries in the then polymer short time therein not It can be decomposed by the microorganisms, also pollute environment.The plastic foil of residual abandoning is present in soil, hinders the development of crop root system and to water Divide, the absorption of nutrient, reduces the gas permeability of soil, lead to crop production reduction；After movement eats the plastic foil of residual abandoning, it will cause intestines Obstruction and it is dead；The synthetic netting and fishline being lost in ocean or discard in ocean cause phase to marine organisms When harm, therefore advocate green consumption with reinforcement environmental protection it is imperative.
In order to reduce white pollution, preserving the ecological environment, people start to study degredation plastic, and the of research Generation degradative plastics is degradation plastic, and this degradation plastic is added to dropping for sub-fraction on the basis of original raw material It solves masterbatch or starch-based initial material, major part is not can be carried out degradation, be also unfavorable for the recycling and reconstruction of plastics；The of research Two generation degradative plastics are biology base controllable full-degradable plastics, and using resourceful, reproducible biomass as raw material, degradation process is green Color, cleaning also help the benign cycle in building soil and environmental system, are to alleviate oil crisis, eliminate having for white pollution Effect approach.
Currently, obstructing stretched film in the biology base of practical application, degrade not thorough enough, implementation result is bad.
Summary of the invention
The present invention provides in a kind of biology base and obstructs stretched film, simple to solve structure mentioned above in the background art, Not thorough enough the problem of degradation.
Technical problem solved by the invention is realized using following technical scheme:
Stretched film, including surface layer, middle layer, internal layer are obstructed in a kind of biology base；
The surface layer includes surface layer resin layer, surface layer additive layer, and the surface layer additive layer is located at surface layer resin layer Lower section, the surface layer resin layer are modification biological base polyester binding (SHQ-GTIE) resin, and the surface layer additive layer is oxygen-containing Resin controlled degradation (YZZJ) additive；
The middle layer includes middle layer resin layer, middle layer additive layer, and the middle layer additive layer is located at middle layer resin layer Lower section, the middle layer resin layer are oxidative biological controlled degradation (YHSZ) resin, and the middle layer additive layer is that environment controllably drops Solve (HJZJ) additive；
The internal layer includes inner layer resin layer, internal layer additive layer, and the internal layer additive layer is located at inner layer resin layer Lower section, the inner layer resin layer are PVA biology base controlled degradation (PVSZ) resin, and the internal layer additive layer is oxidative biological base Controlled degradation (YSZJ) additive.
The percentage thickness on the surface layer is 20%, and the percentage thickness in the middle layer is 60%, the thickness of the internal layer Percentage is 20%.
The percentage thickness of the surface layer resin layer is 85%, the percentage thickness of surface layer additive layer is 15%.
The percentage thickness of the middle layer resin layer is 90%, the percentage thickness of middle layer additive layer is 10%.
The percentage thickness of the inner layer resin layer is 95%, the percentage thickness of internal layer additive layer is 5%.
Oxygen-containing resin controlled degradation (YZZJ) additive, environment controlled degradation (HJZJ) additive, oxidative biological base Controlled degradation (YSZJ) additive is equal are as follows: montmorillonite-based nano master batch.
The invention has the benefit that
It can not only be realized by the technical program degradable, and implementation result is ideal, specific ingredient effect Fruit is as follows:
1 modification biological base polyester binding (SHQ-GTIE) resin: biology base polyester binder resin is carried using special resin Body, special auxiliary agent are medium, by modification, bond with biology base polyester resin co-extrusion, can also bond with polyolefin resin co-extrusion. Modification biological base polyester binder resin is a kind of high molecular polymer, and appearance is yellow-white granular solids, nontoxic, tasteless, nothing Pollution, is a kind of degradable resin, has preferable chemical stability, has many characteristics, such as cementability.Modification biological base polyester is viscous Resin has two kinds of groups of hydrophilic group and hydrophobic group, makes it that can bond with petroleum base resin and glue with bio-based resin It closes, compatibility is good.Modification biological base polyester binder resin is mainly used for bonding or the petroleum base of bio-based resin polyolefins The bonding of resins polyolefins class.
2 oxidative biological controlled degradation (YHSZ) resins: being added degradation modification resin in degradative plastics process of producing product, So that all kinds of non-degradable plastic products is become controllable degradable plastic products, uses the degradative plastics system of degradation modification resin Product are when being exposed in sunlight, high temperature or external force, it will degradation, and degradation time and speed are controllable.Triple controllable drops Resin is solved in degradative plastics production process, the degradative resin of opposed polarity is utilized by spy using multi-layer co-extruded moulding process Compost Biodegradation and oxidative biodegradation, are effectively combined together by different technique co-extrusion working chamber, really realize that degradation can Control property and degradable property.Triple controlled degradation non-toxics, comestible contact, processability is strong, can be with most of material phase Hold, controlled degradation controls degradation time according to necessary requirement, and 100% environmental degradability is fully converted to water, titanium dioxide Carbon and organic matter, will not be harmful to environment or soil, and cost performance is high, and compared with other degradation techniques, cost is relatively low.It is triple can Control degradative resin is mainly used for refuse disposal system, packing business, agricultural, compost and plastics manufacturing industry, is suitable for making all kinds of drops Solve plastic products, such as farm-oriented mulch, drip irrigation zone, shopping bag, plastic bag, refuse bag, courier bag, mess-tin.
3 PVA biology base controlled degradation (PVSZ) resins: degradation modification tree is added in degradative plastics process of producing product Rouge makes all kinds of non-degradable plastic products become controllable degradable plastic products, the degradation of degradation modification resin has been used to mould Material products are when being exposed in sunlight, high temperature or external force, it will degradation, and degradation time and speed are controllable.It is triple can Degradative resin is controlled in degradative plastics production process, using multi-layer co-extruded moulding process, by the degradative resin of opposed polarity, benefit With special process co-extrusion working chamber, effectively Compost Biodegradation and oxidative biodegradation are combined together, really realize drop Solve controllability and degradable property.Triple controlled degradation non-toxics, comestible contact, processability is strong, can be with most of material Expect compatible, controlled degradation, degradation time is controlled according to necessary requirement, 100% environmental degradability is fully converted to water, two Carbonoxide and organic matter, will not be harmful to environment or soil, and cost performance is high, and compared with other degradation techniques, cost is relatively low.Three Weight controlled degradation resin is mainly used for refuse disposal system, packing business, agricultural, compost and plastics manufacturing industry, and it is each to be suitable for production Class degradative plastics product, such as farm-oriented mulch, drip irrigation zone, shopping bag, plastic bag, refuse bag, courier bag, mess-tin.
4 are added degradant additive by proportion in material modification production process, and various modified resins is made to become controllably dropping The modified resin raw material of solution, is added degradant additive in degradation products production process, becomes all kinds of non-degradable plastic products Controllable completely degradable plastic product；Degradant additive is added in resin in plastic product production process, and without changing life Equipment and program are produced, the degradative plastics product of degradant additive is added to, when being exposed in sunlight, high temperature or external force, It will degrade, and degradation time and speed are controllable；Degradant additive is non-toxic, and comestible contact, processability is strong, can be with big portion Divide material compatible, controlled degradation controls degradation time according to necessary requirement, and 100% environmental degradability is fully converted to Water, carbon dioxide and organic matter, will not be harmful to environment or soil, and cost performance is high, compared with other degradation techniques, cost compared with It is low；Degradant additive is mainly used for refuse disposal system, packing business, agricultural, compost and plastics manufacturing industry, is suitable for making all kinds of Degradative plastics product, such as farm-oriented mulch, drip irrigation zone, shopping bag, plastic bag, refuse bag, courier bag, mess-tin.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
In figure: the surface layer 1-, the middle layer 2-, 3- internal layer, the surface layer 4- resin layer, the surface layer 5- additive layer, the middle layer 6- resin layer, 7- Middle layer additive layer, 8- inner layer resin layer, 9- internal layer additive layer.
Specific embodiment
Stretched film, including surface layer 1, middle layer 2, internal layer 3 are obstructed in a kind of biology base；
Surface layer 1 includes surface layer resin layer 4, surface layer additive layer 5, and surface layer additive layer 5 is located under surface layer resin layer 4 Side, surface layer resin layer 4 are modification biological base polyester binding (SHQ-GTIE) resin, and surface layer additive layer 5 is that oxygen-containing resin is controllable Degradation (YZZJ) additive；
Middle layer 2 includes middle layer resin layer 6, middle layer additive layer 7, and middle layer additive layer 7 is located under middle layer resin layer 6 Side, middle layer resin layer 6 are oxidative biological controlled degradation (YHSZ) resin, and middle layer additive layer 7 is environment controlled degradation (HJZJ) Additive；
Internal layer 3 includes inner layer resin layer 8, internal layer additive layer 9, and internal layer additive layer 9 is located under inner layer resin layer 8 Side, inner layer resin layer 8 are PVA biology base controlled degradation (PVSZ) resin, and internal layer additive layer 9 is oxidative biological base controlled degradation (YSZJ) additive.
The percentage thickness on surface layer 1 is 20%, and the percentage thickness in middle layer 2 is 60%, and the percentage thickness of internal layer 3 is 20%.
The percentage thickness of surface layer resin layer 4 is 85%, the percentage thickness of surface layer additive layer 5 is 15%.
The percentage thickness of middle layer resin layer 6 is 90%, the percentage thickness of middle layer additive layer 7 is 10%.
The percentage thickness of inner layer resin layer 8 is 95%, the percentage thickness of internal layer additive layer 9 is 5%.
Oxygen-containing resin controlled degradation (YZZJ) additive, environment controlled degradation (HJZJ) additive, oxidative biological base Controlled degradation (YSZJ) additive is equal are as follows: montmorillonite-based nano master batch.
The technical program uses binary process forming technique, refers on the basis of unitary technological forming (Recipe), Increase moulding process, unitary Recipe can only occupy 50% technology content in process of producing product, in addition binary at Type technique could improve the basic fundamental guarantee of product, be mainly reflected in the thinned of product and thicken, and enhancing is thinned, effectively drops Low cost improves occupation rate of market.
Binary process forming technique includes: unitary Recipe, binary moulding process.
Unitary Recipe includes:
1 oxygen-containing polyolefin controlled degradation material prescription technique；2 oxidative biological controlled degradation material prescription techniques；
3 PVA biology base controlled degradation material prescription techniques；4 PBAT biology base controlled degradation material prescription techniques；
5 triple controlled degradation technical formula techniques；6 quadruple controlled degradation technical formula techniques；
7 five heavy controlled degradation technical formula techniques；8 sixfold controlled degradation technical formula techniques；
9 three layers of water-retaining type controlled degradation technical formula technique.
Binary moulding process includes:
1 vacuum sizing moulding process；2 intelligent weighing system moulding process；
3 interlayer material controlling intelligent control moulding process；4 intelligent control thickness moulding process；
5 intelligent control width moulding process；6 intelligence correction moulding process；
7 liang of bubble method moulding process；8 three bubble method moulding process；
9 four bubble method moulding process；10 puma manipulator automatic winding moulding process.
Principle:
Biology base controllable full-degradable plastics can be divided into starch, polyesters and other classes according to raw material point；
Starch is abundance, cheap natural macromolecular material, and native starch is that have crystalline texture with inside Existing for little particle state, molecular structure has straight chain and two kinds of branch.For different plant varieties, the shape of starch granules The ratio of state, size and amylose and amylopectin content is all different.The partial size of starch granules is mostly in 15-100 μm.The chain compound that the glucose of amylose is combined with α-D-1,4 glycosidic bonds, relative molecular mass are (20-200) x104.The connection type of each glucose unit removes α-D-1 in amylopectin, and outside 4 glycosidic bonds, there is also α-D-1,6 glycosidic bonds, phases It is (100-400) x10 to molecular mass6.The property of starch and relative molecular mass, branch lengths and the straight chain of starch form sediment Powder is related with the ratio of amylopectin.The starch of high amylose content has preferable machine more suitable for preparing plastics, resulting product Tool performance.Native starch is intermolecular, and there are hydrogen bonds, and dissolubility is very poor, hydrophilic but not soluble easily in water, it has highly polar knot Brilliant property.Since there are strong hydrogen bonding effects between the macromolecule of native starch, it is difficult to direct machine-shaping.To improve its processing technology Performance, generally by the hydrogen bond for opening starch interchain, the method for making starch lose crystallization is realized.There are two types of its operating methods, One is the starch solution that heating aqueous amount is greater than 90%, starch granules starts to be swollen between 60~70 DEG C, reaches 90 in temperature Starch granules starts to burst apart after DEG C, and macromolecule interchain hydrogen bond is opened, and generates gelation；Another kind is added under air-tight state Heat plasticates and squeezes out starch of the water content less than 28%.
Polylactic acid (PLA) is also referred to as polylactide, belongs to polyester family, and structural formula is (- O-CHCH3-CO-) n.
The most important two kinds of polymerizations of polylactic acid are direct polymerization method and ring-opening polymerisation method.Direct polymerization method is typical Polycondensation reaction.Using the activity of lactic acid, by heating, dehydration condensation occurs between lactic acid molecules, obtains polylactic acid.It is directly poly- Legal simple production process, production cost is low, is not required to the intermediate of reaction to be separated.But the molecular weight of polylactic acid is lower, molecule Measure distributed more widely, performance is poor.Lactide ring-opening polymerisation method produces polylactic acid using two-step method.It is cyclized and is made by acid by dehydrating lactic first Then polylactic acid is made by refined lactide ring-opening polymerisation again in lactide.Polylactic acid physical force made from ring-opening polymerisation method Better performances are learned, the production cost of the method is higher than direct polymerization method.
The degradation of polylactic acid is divided into simple hydrolysis (acid-base catalysis) and enzymatic hydrolysis degradation.The principal degradation side of polylactic acid Formula is bulk erosion.Hydrophobic polymer becomes low relative molecular weight, water by the hydrolysis of labile bond on main chain (C-O key) Then soluble molecule and monomer are further degraded to water and carbon dioxide under the action of enzyme.The degradation of polylactic acid right and wrong first The hydrolysis of crystalline region, followed by crystalline region.Hydrolysis can because carboxyl there are due to accelerate.There are autocatalysis inside polylactic acid, Inside degradation speed specific surface it is fast.When degrading beginning, the hydrolysis of ester bond is isotropic in matrix.In degradation process In, carboxyl end group is to having hydrolyzed catalytic action.With the progress of degradation, carboxyl end group amount increases, and degradation rate is accelerated.
Water flea acute toxicity test
1. test is summarized
Water flea acute toxicity test compares test with degradation compost and standard compost, and detection contains degradation oxidative biological drop Solve toxic effect of the degradation compost to water flea of plastics.Degradation oxidized-biodegradable plastic usually contains respectively after biodegrade Kind metabolite, the undegraded complete product in part and inorganic matter.
The toxicity of degradation compost can be measured with survival rate of the water flea in degradation compost and standard compost.
2. test specification
This test uses OECD chemicals test rule #202 " water flea class biological activity test and the breeding examination of OECD It tests ".
3. test procedure
(1) compost eluate 1 part of compost and 4 parts of water heats 2 hours through 60 DEG C, is made.By the coefficient of dilution of this liquid It is set to 4 ×.
(2) diluted concentration determine the test coefficient of dilution be 4 ×, 8 ×, 16 ×, 32 ×, 64 × dilution.
(3) it is packed into 20ml diluent liquid in test tube, is put into 5 water fleas, 4 repetitions of each test.
(4) test temperature is 18~22 DEG C.It is protected from light.
The survival rate of water flea is detected after (5) 24 hours.If water flea is in heaven or recumbency bottom, do not lived in 10 second observation period It is dynamic, also think in heaven.
(6) if in the fresh water of standard, the death rate of water flea is more than 10%, and test is invalid.It need to test again.
Diluted concentration determines the result of trial test are as follows:
Standard fresh water: survival rate 100%
Standard compost 4 ×: survival rate 30%
Standard compost 8 ×: survival rate 70%
Standard compost 16 ×: survival rate 100%
Standard compost 32 ×: survival rate 100%
Standard compost 64 ×: survival rate 100%
Test diluted concentration be selected as 4 ×~20 ×.Such as 4 ×, 8 ×, 12 ×, 16 ×, 20 ×.It is small that test carries out 24 When.
According to test result, show that various degradation compost dilutions do not have significant adverse effect to the survival rate of water flea. When the survival rate of the degradation compost dilution that diluted concentration is 4X and 8X, water flea is greater than corresponding standard compost dilution.
The embodiments of the present invention have been described in detail above, but content is only the preferred embodiment of the present invention, It should not be considered as limiting the scope of the invention, any changes and modifications in accordance with the scope of the present application, It should still be within the scope of the patent of the present invention.

Claims (6)

1. obstructing stretched film in a kind of biology base, it is characterised in that:
Including surface layer, middle layer, internal layer；
The surface layer includes surface layer resin layer, surface layer additive layer, and the surface layer additive layer is located at the lower section of surface layer resin layer, The surface layer resin layer is modification biological base polyester binding (SHQ-GTIE) resin, and the surface layer additive layer is that oxygen-containing resin can Control degradation (YZZJ) additive；
The middle layer includes middle layer resin layer, middle layer additive layer, and the middle layer additive layer is located at the lower section of middle layer resin layer, The middle layer resin layer is oxidative biological controlled degradation (YHSZ) resin, and the middle layer additive layer is environment controlled degradation (HJZJ) additive；
The internal layer includes inner layer resin layer, internal layer additive layer, and the internal layer additive layer is located at the lower section of inner layer resin layer, The inner layer resin layer is PVA biology base controlled degradation (PVSZ) resin, and the internal layer additive layer is that oxidative biological base is controllable Degradation (YSZJ) additive.
2. obstructing stretched film in a kind of biology base according to claim 1, it is characterised in that: the thickness percentage on the surface layer Than being 20%, the percentage thickness in the middle layer is 60%, and the percentage thickness of the internal layer is 20%.
3. obstructing stretched film in a kind of biology base according to claim 1, it is characterised in that: the thickness of the surface layer resin layer Degree percentage is 85%, the percentage thickness of surface layer additive layer is 15%.
4. obstructing stretched film in a kind of biology base according to claim 1, it is characterised in that: the thickness of the middle layer resin layer Degree percentage is 90%, the percentage thickness of middle layer additive layer is 10%.
5. obstructing stretched film in a kind of biology base according to claim 1, it is characterised in that: the thickness of the inner layer resin layer Degree percentage is 95%, the percentage thickness of internal layer additive layer is 5%.
6. obstructing stretched film in a kind of biology base according to claim 1, it is characterised in that: the oxygen-containing resin controllably drops It is equal to solve (YZZJ) additive, environment controlled degradation (HJZJ) additive, oxidative biological base controlled degradation (YSZJ) additive are as follows: cover De- soil nanometer of master batch.
CN201910490009.8A 2019-06-06 2019-06-06 Stretched film is obstructed in a kind of biology base Withdrawn CN110356064A (en)

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Publication Number Publication Date
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Application publication date: 20191022