CN109749212A - A kind of mulch and preparation method thereof - Google Patents
A kind of mulch and preparation method thereof Download PDFInfo
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Abstract
The present invention provides a kind of mulch and preparation method thereof.Mulch of the invention is grouped as by the group of following parts by weight: linear low density polyethylene 76.5-81.8 parts by weight, metallocene linear polyethylene 15-20 parts by weight, high density polyethylene (HDPE) 3-5 parts by weight, hindered amine light stabilizer 0.02-0.15 parts by weight, phenolic antioxidant 0.05-0.15 parts by weight and esters antioxidant 0.05-0.2 parts by weight；In particular, melt flow rate (MFR) MFR≤1.0g/10min of the metallocene linear polyethylene, density 0.916-0.922g/cm3.Mulch of the invention is free of ultraviolet absorbing agent and dispersing agent, reduces production cost while realizing ageing-resistant effect；In particular, the mulch meets the related request of DB65/3189-2014 standard, it can be used for high temperature, the high non-irrigated environment of the harshness such as Xinjiang, have wide range of applications.
Description
Technical field
The present invention relates to a kind of mulches and preparation method thereof, and in particular to a kind of mulch and its system without ultraviolet absorber
Preparation Method.
Background technique
Mulch, that is, covered ground film has Meteorological effect, resisting drought saving water, improves soil physico-chemical property, improves soil fertilizer
Power inhibits weeds, prevents pest attacks, promotes the effects of plant growth.In China, mulch be widely used in grain, cotton,
In the multiple kinds of crops such as oil, dish, melon and fruit, cigarette, sugar, medicine, fiber crops, tea, woods, the deep welcome by vast farmers.In China three northern areas of China,
Low temperature, short of rain, arid, barren, frost-free period is short etc., and factors limit the development of agricultural, and mulch is for ensureing drought-hit area crop at this time
Grow it is most important, the drought-resistant agriculture extended surface upgrading such as boosting northwest, stable yields volume increase on play irreplaceable role.
Mulching film planting covers a large amount of plastic film in field, and it is in the soil and difficult to remain after crop harvest
With degradation, therefore certain pollution and damage can be caused to soil, plastic film largely uses brought white pollution problems
It is increasingly prominent.In particular, Some Enterprises and peasant household in order to profit-push, reduce economic cost to reduce the thickness of mulch and
Quality causes the ageing-resistant performance of mulch insufficient, especially in drought, the northwest that the sunshine-duration is long, solar irradiance is high
Equal areas, the aging of mulch is more serious, and in crop maturity, mulch is incoherent to can not effectively recycle, and seriously affects
The growth of crops and Land Environment.Therefore, especially expect that a kind of ageing-resistant performance is high consequently facilitating the mulch recycled.
The Chinese patent of 102660074 A of Publication No. CN discloses a kind of dedicated weather-proof function mulch of a film 2 years,
It is made of the raw material of following weight percents: LLDPE 60-80%, LDPE5-15%, HDPE3-8%, mPE5-15% is resistance to old
Change masterbatch 2-6%；Wherein, ageing-resistant masterbatch is made of the raw material of following weight percents: LLDPE powder 35-45%,
LDPE25-35%, HDPE6-15%, mPE5-12%, hindered amine light stabilizer 2-7%, antioxidant 0.5-3.5%, ultraviolet light
Absorbent 0.5-3.5%, dispersing agent white oil 1.5-5.0%；Though above-mentioned weatherability mulch still has higher object after using 360 days
Mechanical performance retention rate is managed, but initial mechanical performance does not meet the standard requirements (DB65/3189-2014) in Xinjiang place, therefore
It is not used in the non-irrigated environment of high temperature, height of Xinjiang harshness；In addition, above-mentioned mulch uses a large amount of hindered amine light stabilizer and purple
Ultraviolet absorbers are ageing-resistant to achieve the effect that, cost amplification is larger, it is difficult to effective promotion and application are obtained in peasant household.
Summary of the invention
The present invention provides a kind of mulch and preparation method thereof, which is free of ultraviolet absorbing agent and dispersing agent, is realizing
Production cost is reduced while ageing-resistant effect；In particular, the mulch meets the related request of DB65/3189-2014 standard,
High temperature, the high non-irrigated environment that can be used for the harshness such as Xinjiang, have wide range of applications.
The present invention provides a kind of mulch, is grouped as by the group of following parts by weight: linear low density polyethylene 76.5-81.8 weight
Measure part, metallocene linear polyethylene 15-20 parts by weight, high density polyethylene (HDPE) 3-5 parts by weight, hindered amine light stabilizer 0.02-
0.15 parts by weight, phenolic antioxidant 0.05-0.15 parts by weight and esters antioxidant 0.05-0.2 parts by weight.
Mulch of the invention can obtain good ageing-resistant effect in the case where not containing ultraviolet absorbing agent, no
It only can satisfy 24 months validity periods in drought, the Northwest that the sunshine-duration is long, solar irradiance is high, consequently facilitating
Effective recycling of mulch, furthermore greatly reduces the production cost of mulch；In particular, the mulch with above-mentioned specific composition is initial
Good mechanical properties meet the related request of DB65/3189-2014 standard, can be used for high temperature, the high non-irrigated ring of the harshness such as Xinjiang
Border, it is unrestricted using application.
In the present invention, the melt flow rate (MFR) MFR of the linear low density polyethylene is 1.0-2.0g/10min, density
For 0.916-0.924g/cm3.Specifically, linear low density polyethylene resin can selected from DFDA7047, DFDA7042 and
At least one of LL0209AA, preferably LL0209AA.
In the present invention, melt flow rate (MFR) MFR≤1.0g/10min of the metallocene linear polyethylene, density are
0.916-0.922g/cm3；Further, the weight average molecular weight of the metallocene linear polyethylene is 7-10 ten thousand, molecular weight distribution
For 2.0-3.1.The present invention is controlled its content above-mentioned by selecting the metallocene linear polyethylene of above-mentioned particular requirement
Reasonable range increases the initial mechanical performance of mulch.
In the present invention, the melt flow rate (MFR) MFR of the high density polyethylene (HDPE) is 0.5-8.0g/10min, and density is
0.940-0.960g/cm3.Specifically, high density polyethylene (HDPE) can be in DMDA8008, HD5410,5000S and DGDX6095
At least one, preferably DMDA8008.
Further, the quality proportioning of the hindered amine light stabilizer and the esters antioxidant can be 1:(1-4)；
The quality proportioning of the phenolic antioxidant and the esters antioxidant can be 1:(1-4).Above-mentioned quality proportioning range is guaranteeing
While ground film properties, the production cost of mulch is advantageously reduced.
In the present invention, hindered amine light stabilizer can in Tinuvin 622 and Tinuvin944 at least one
Kind, preferably Tinuvin944；Phenolic antioxidant can be antioxidant 1010；Esters antioxidant can be irgasfos 168.
In mulch of the invention, the existing mulch of the amount ratio of hindered amine light stabilizer is 3-10 times low, by will be a small amount of
Hindered amine light stabilizer and the esters antioxidant of low cost carry out compatibility, the case where not adding high cost UV absorbent
Under increase the ageing-resistant performance of mulch, meet it in drought, the Northwest that the sunshine-duration is long, solar irradiance is high
24 months validity periods, production cost is reduced while reaching identical ageing-resistant effect, is easy to by peasant and film manufacturer
Receive, realizes effective recycling of mulch, reduce white pollution.
The present invention also provides the preparation methods of above-mentioned mulch, include the following steps:
By 76.5-81.8 parts by weight linear low density polyethylene, 15-20 parts by weight metallocene linear polyethylene, 3-5 weight
Part high density polyethylene (HDPE), 0.02-0.15 parts by weight hindered amine light stabilizer, 0.05-0.15 parts by weight phenolic antioxidant and
0.05-0.2 parts by weight esters antioxidant is uniformly mixed, and mixture is made；
Mixture plasticizing is squeezed out, inflation traction, the mulch is made.
Further, the temperature that the plasticizing squeezes out is 190-230 DEG C.
Further, the blow-up ratio of the inflation traction is 2.5-3.0, draw ratio 4-6.
The present invention does not limit the size of mulch strictly, can rationally be arranged according to actual needs；The thickness of mulch can be with
For 0.008 ± 0.013mm, width can be 700-1400mm.
Implementation of the invention, at least has the advantage that
1, in mulch of the invention, the existing mulch of the amount ratio of hindered amine light stabilizer is 3-10 times low, by will be a small amount of
Hindered amine light stabilizer and low cost esters antioxidant carry out compatibility, in the feelings for not adding high cost UV absorbent
The ageing-resistant performance that mulch is increased under condition meets it in drought, the sunshine-duration is long, solar irradiance is high northwest
24 months validity periods in area.
2, mulch of the invention is controlled by selecting specific metallocene linear polyethylene, while by its content reasonable
Range, do not add high-cost hp-ldpe LDPE, while reducing high-cost high density polyethylene
Additional amount, increase the initial mechanical performance of mulch；The mulch of the specific composition is initial mechanical functional, meets DB65/
The related request of 3189-2014 standard, can be used for high temperature, the high non-irrigated environment of the harshness such as Xinjiang, and use scope is unrestricted.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the embodiment of the present invention, to this
Technical solution in inventive embodiments is clearly and completely described, it is clear that described embodiment is that a part of the invention is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creation
Property labour under the premise of every other embodiment obtained, shall fall within the protection scope of the present invention.
The raw material that each embodiment and reference examples use is as follows:
Linear low density polyethylene: LL0209AA, melt flow rate (MFR) MFR are 1.0-2.0g/10min, and density is
0.916-0.924g/cm3, come from Dushanzi petro-chemical corporation；
Metallocene linear polyethylene: melt flow rate (MFR) MFR≤1.0g/10min, density 0.916-0.922g/cm3,
Weight average molecular weight is 7-10 ten thousand, molecular weight distribution 2.0-3.1；
High density polyethylene (HDPE): DMDA8008, melt flow rate (MFR) MFR are 0.5-8.0g/10min, density 0.940-
0.960g/cm3, come from Dushanzi petro-chemical corporation；
Hindered amine light stabilizer: Tinuvin944, from German BASF；
Phenolic antioxidant: antioxidant 1010 is purchased from Jin Hai Albemarle Corporation；
Esters antioxidant: irgasfos 168 is purchased from Jin Hai Albemarle Corporation.
Embodiment 1
One, mulch forms
The mulch of the present embodiment is grouped as by the group of following parts by weight:
Wherein, the melt flow rate (MFR) MFR of metallocene linear polyethylene is 1.0g/10min, density 0.918g/cm3,
Weight average molecular weight is 8.9 ten thousand, molecular weight distribution 2.0.
Two, the preparation method of mulch
By above-mentioned parts by weight by linear low density polyethylene, metallocene linear polyethylene, high density polyethylene (HDPE), hindered amines
Light stabilizer, phenolic antioxidant and esters antioxidant are uniformly mixed, and mixture is made；Then, uniformly mixed mixture is led to
Cross autoloader put into plasticizing extruder hopper be plasticized automatically extrusion, inflation traction；Wherein, the temperature for being plasticized extrusion is
190 DEG C, the blow-up ratio of inflation traction is 3, draw ratio 4, rolling cutting, and being made with a thickness of 0.008mm, width is 700mm's
Mulch (is denoted as A1).
Mulch obtained is detected according to Xinjiang provincial standard DB65/3189-2014；Specifically, using GB/
T1040.3-2006 method detects the tensile load (vertical/horizontal) of mulch, using the disconnected of 1040.2 test method of GB/T detection mulch
Elongation (vertical/horizontal) is split, using the right-angle tearing load (vertical/horizontal) of QB/T 1130-91 method detection mulch, the results are shown in Table 1.
Embodiment 2
One, mulch forms
The mulch of the present embodiment is grouped as by the group of following parts by weight:
Wherein, the melt flow rate (MFR) MFR of metallocene linear polyethylene is 0.5g/10min, density 0.916g/cm3,
Weight average molecular weight is 100,000, molecular weight distribution 2.2.
Two, the preparation method of mulch
By above-mentioned parts by weight by linear low density polyethylene, metallocene linear polyethylene, high density polyethylene (HDPE), hindered amines
Light stabilizer, phenolic antioxidant and esters antioxidant are uniformly mixed, and mixture is made；Then, uniformly mixed mixture is led to
Cross autoloader put into plasticizing extruder hopper be plasticized automatically extrusion, inflation traction；Wherein, the temperature for being plasticized extrusion is
210 DEG C, the blow-up ratio of inflation traction is 2.8, draw ratio 5, and rolling cutting is made with a thickness of 0.010mm, width 1200mm
Mulch (being denoted as A2).
Mulch obtained is detected according to 1 method of embodiment, the results are shown in Table 1.
Embodiment 3
One, mulch forms
The mulch of the present embodiment is grouped as by the group of following parts by weight:
Wherein, the melt flow rate (MFR) MFR of metallocene linear polyethylene is 0.9g/10min, density 0.918g/cm3,
Weight average molecular weight is 9.1 ten thousand, molecular weight distribution 2.5.
Two, the preparation method of mulch
By above-mentioned parts by weight by linear low density polyethylene, metallocene linear polyethylene, high density polyethylene (HDPE), hindered amines
Light stabilizer, phenolic antioxidant and esters antioxidant are uniformly mixed, and mixture is made；Then, uniformly mixed mixture is led to
Cross autoloader put into plasticizing extruder hopper be plasticized automatically extrusion, inflation traction；Wherein, the temperature for being plasticized extrusion is
220 DEG C, the blow-up ratio of inflation traction is 2.5, draw ratio 5, and rolling cutting is made with a thickness of 0.010mm, width 1200mm
Mulch (being denoted as A3).
Mulch obtained is detected according to 1 method of embodiment, the results are shown in Table 1.
Embodiment 4
One, mulch forms
The mulch of the present embodiment is grouped as by the group of following parts by weight:
Wherein, the melt flow rate (MFR) MFR of metallocene linear polyethylene is 0.6g/10min, density 0.919g/cm3,
Weight average molecular weight is 9.7 ten thousand, molecular weight distribution 2.8.
Two, the preparation method of mulch
By above-mentioned parts by weight by linear low density polyethylene, metallocene linear polyethylene, high density polyethylene (HDPE), hindered amines
Light stabilizer, phenolic antioxidant and esters antioxidant are uniformly mixed, and mixture is made；Then, uniformly mixed mixture is led to
Cross autoloader put into plasticizing extruder hopper be plasticized automatically extrusion, inflation traction；Wherein, the temperature for being plasticized extrusion is
230 DEG C, the blow-up ratio of inflation traction is 2.5, draw ratio 6, and rolling cutting is made with a thickness of 0.010mm, width 1300mm
Mulch (being denoted as A4).
Mulch obtained is detected according to 1 method of embodiment, the results are shown in Table 1.
Embodiment 5
One, mulch forms
The mulch of the present embodiment is grouped as by the group of following parts by weight:
Wherein, the melt flow rate (MFR) MFR of metallocene linear polyethylene is 0.5g/10min, density 0.920g/cm3,
Weight average molecular weight is 8.6 ten thousand, molecular weight distribution 3.0.
Two, the preparation method of mulch
By above-mentioned parts by weight by linear low density polyethylene, metallocene linear polyethylene, high density polyethylene (HDPE), hindered amines
Light stabilizer, phenolic antioxidant and esters antioxidant are uniformly mixed, and mixture is made；Then, uniformly mixed mixture is led to
Cross autoloader put into plasticizing extruder hopper be plasticized automatically extrusion, inflation traction；Wherein, the temperature for being plasticized extrusion is
230 DEG C, the blow-up ratio of inflation traction is 3, draw ratio 5, rolling cutting, and being made with a thickness of 0.012mm, width is 1400mm's
Mulch (is denoted as A5).
Mulch obtained is detected according to 1 method of embodiment, the results are shown in Table 1.
Embodiment 6
One, mulch forms
The mulch of the present embodiment is grouped as by the group of following parts by weight:
Wherein, the melt flow rate (MFR) MFR of metallocene linear polyethylene is 1.0g/10min, density 0.922g/cm3,
Weight average molecular weight is 7.4 ten thousand, molecular weight distribution 3.1.
Two, the preparation method of mulch
By above-mentioned parts by weight by linear low density polyethylene, metallocene linear polyethylene, high density polyethylene (HDPE), hindered amines
Light stabilizer, phenolic antioxidant and esters antioxidant are uniformly mixed, and mixture is made；Then, uniformly mixed mixture is led to
Cross autoloader put into plasticizing extruder hopper be plasticized automatically extrusion, inflation traction；Wherein, the temperature for being plasticized extrusion is
230 DEG C, the blow-up ratio of inflation traction is 3, draw ratio 5, rolling cutting, and being made with a thickness of 0.013mm, width is 1400mm's
Mulch (is denoted as A6).
Mulch obtained is detected according to 1 method of embodiment, the results are shown in Table 1.
Embodiment 7
One, mulch forms
The mulch of the present embodiment is grouped as by the group of following parts by weight:
Wherein, the melt flow rate (MFR) MFR of metallocene linear polyethylene is 1.0g/10min, density 0.920g/cm3,
Weight average molecular weight is 7.3 ten thousand, molecular weight distribution 3.1.
Two, the preparation method of mulch
By above-mentioned parts by weight by linear low density polyethylene, metallocene linear polyethylene, high density polyethylene (HDPE), hindered amines
Light stabilizer, phenolic antioxidant and esters antioxidant are uniformly mixed, and mixture is made；Then, uniformly mixed mixture is led to
Cross autoloader put into plasticizing extruder hopper be plasticized automatically extrusion, inflation traction；Wherein, the temperature for being plasticized extrusion is
230 DEG C, the blow-up ratio of inflation traction is 3, draw ratio 5, rolling cutting, and being made with a thickness of 0.013mm, width is 1400mm's
Mulch (is denoted as A7).
Mulch obtained is detected according to 1 method of embodiment, the results are shown in Table 1.
Reference examples 1
One, mulch forms
The mulch of this reference examples is grouped as by the group of following parts by weight:
Wherein, the melt flow rate (MFR) MFR of metallocene linear polyethylene is 1.0g/10min, density 0.919g/cm3,
Weight average molecular weight is 9.5 ten thousand, molecular weight distribution 2.2.
Two, the preparation method of mulch
By above-mentioned parts by weight by linear low density polyethylene, metallocene linear polyethylene, high density polyethylene (HDPE), hindered amines
Light stabilizer, phenolic antioxidant and esters antioxidant are uniformly mixed, and mixture is made；Then, uniformly mixed mixture is led to
Cross autoloader put into plasticizing extruder hopper be plasticized automatically extrusion, inflation traction；Wherein, the temperature for being plasticized extrusion is
210 DEG C, the blow-up ratio of inflation traction is 3, draw ratio 4, rolling cutting, and being made with a thickness of 0.010mm, width is 700mm's
Mulch (is denoted as B1).
Mulch obtained is detected according to 1 method of embodiment, the results are shown in Table 1.
Reference examples 2
The mulch of this reference examples is grouped as by the group of following parts by weight:
Wherein, the melt flow rate (MFR) MFR of metallocene linear polyethylene is 1.2g/10min, density 0.920g/cm3,
Weight average molecular weight is 8.0 ten thousand, molecular weight distribution 2.5.
Two, the preparation method of mulch
By above-mentioned parts by weight by linear low density polyethylene, metallocene linear polyethylene, high density polyethylene (HDPE), hindered amines
Light stabilizer, phenolic antioxidant and esters antioxidant are uniformly mixed, and mixture is made；Then, uniformly mixed mixture is led to
Cross autoloader put into plasticizing extruder hopper be plasticized automatically extrusion, inflation traction；Wherein, the temperature for being plasticized extrusion is
210 DEG C, the blow-up ratio of inflation traction is 3, draw ratio 4, rolling cutting, and being made with a thickness of 0.011mm, width is 700mm's
Mulch (is denoted as B2).
Mulch obtained is detected according to 1 method of embodiment, the results are shown in Table 1.
Reference examples 3
The mulch of this reference examples is grouped as by the group of following parts by weight:
Wherein, the melt flow rate (MFR) MFR of metallocene linear polyethylene is 1.0g/10min, density 0.919g/cm3,
Weight average molecular weight is 9.0 ten thousand, molecular weight distribution 3.2.
Two, the preparation method of mulch
By above-mentioned parts by weight by linear low density polyethylene, metallocene linear polyethylene, high density polyethylene (HDPE), hindered amines
Light stabilizer, phenolic antioxidant and esters antioxidant are uniformly mixed, and mixture is made；Then, uniformly mixed mixture is led to
Cross autoloader put into plasticizing extruder hopper be plasticized automatically extrusion, inflation traction；Wherein, the temperature for being plasticized extrusion is
210 DEG C, the blow-up ratio of inflation traction is 3, draw ratio 4, rolling cutting, and being made with a thickness of 0.010mm, width is 700mm's
Mulch (is denoted as B3).
Mulch obtained is detected according to 1 method of embodiment, the results are shown in Table 1.
Test example 1
The mulch of embodiment 1-7 and reference examples 1-3 are used under the high temperature, high non-irrigated environment of Xinjiang harshness, in which: each mulch
Environmental condition when use are as follows: annual June~September temperature on average is at 30 DEG C or more, and excessive temperature is up to 45 DEG C, average annual precipitation
Only 16.4mm or so, drought in summer are short of rain for amount.
Each mulch after using is detected according to 1 method of embodiment, each mulch is using 6 months, 12 months and 24
Result after a month is shown in Table 2 to table 4 respectively.
The quality measurements of the initial mulch of table 1
The quality measurements of mulch after table 2 uses 6 months
The quality measurements of mulch after table 3 uses 12 months
The quality measurements of mulch after table 4 uses 24 months
From the above results:
1, the mulch of various embodiments of the present invention is initial mechanical functional, and the correlation for meeting DB65/3189-2014 standard is wanted
The harsh high temperature, high non-irrigated environment such as ask, therefore can be used for Xinjiang, use scope is unrestricted.
2, the mulch of various embodiments of the present invention is in drought, the Northwest's energy that the sunshine-duration is long, solar irradiance is high
Enough realize 24 months validity periods, the ageing-resistant performance of mulch is good, consequently facilitating effective recycling of mulch, reduces white dirt
Dye.
3, the initial mechanical performance of the mulch of each reference examples is unable to satisfy the related request of DB65/3189-2014 standard, furthermore
Mulch is not easily recycled, and be also easy to produce white pollution, ground in the high temperature of the harshness such as Xinjiang, the loss of properties on aging of high non-irrigated environment
The use scope of film is limited.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of mulch, which is characterized in that be grouped as by the group of following parts by weight: linear low density polyethylene 76.5-81.8 weight
Measure part, metallocene linear polyethylene 15-20 parts by weight, high density polyethylene (HDPE) 3-5 parts by weight, hindered amine light stabilizer 0.02-
0.15 parts by weight, phenolic antioxidant 0.05-0.15 parts by weight and esters antioxidant 0.05-0.2 parts by weight.
2. mulch according to claim 1, which is characterized in that the melt flow rate (MFR) of the linear low density polyethylene
MFR is 1.0-2.0g/10min, density 0.916-0.924g/cm3。
3. mulch according to claim 1, which is characterized in that the melt flow rate (MFR) of the metallocene linear polyethylene
MFR≤1.0g/10min, density 0.916-0.922g/cm3。
4. mulch according to claim 1 or 3, which is characterized in that the weight average molecular weight of the metallocene linear polyethylene
For 7-10 ten thousand, molecular weight distribution 2.0-3.1.
5. mulch according to claim 1, which is characterized in that the melt flow rate (MFR) MFR of the high density polyethylene (HDPE) is
0.5-8.0g/10min, density 0.940-0.960g/cm3。
6. mulch according to claim 1, which is characterized in that the hindered amine light stabilizer and the esters antioxidant
Quality proportioning be 1:(1-4).
7. mulch according to claim 1, which is characterized in that the quality of the phenolic antioxidant and the esters antioxidant
Proportion is 1:(1-4).
8. the preparation method of any mulch of claim 1 to 7, which comprises the steps of:
76.5-81.8 parts by weight linear low density polyethylene, 15-20 parts by weight metallocene linear polyethylene, 3-5 parts by weight are high
Density polyethylene, 0.02-0.15 parts by weight hindered amine light stabilizer, 0.05-0.15 parts by weight phenolic antioxidant and 0.05-
0.2 parts by weight esters antioxidant is uniformly mixed, and mixture is made；
Mixture plasticizing is squeezed out, inflation traction, the mulch is made.
9. preparation method according to claim 8, which is characterized in that the temperature that the plasticizing squeezes out is 190-230 DEG C.
10. preparation method according to claim 8, which is characterized in that the blow-up ratio of the inflation traction is 2.5-3.0,
Draw ratio is 4-6.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110885490A (en) * | 2019-12-17 | 2020-03-17 | 甘肃省农业科学院 | Special easily-recycled mulching film for large-scale potato farm planting |
| CN113105686A (en) * | 2021-04-19 | 2021-07-13 | 云南雷马塑料制品有限公司 | Special shed film for flowers and preparation method thereof |
| CN117089150A (en) * | 2023-09-12 | 2023-11-21 | 会宁县沃土农业科技有限公司 | Moisture-preserving soil moisture-preserving mulching film for high-standard farmland and preparation method thereof |
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