CN107513201A - A kind of woven bag silk of UV resistant - Google Patents
A kind of woven bag silk of UV resistant Download PDFInfo
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- CN107513201A CN107513201A CN201710850141.6A CN201710850141A CN107513201A CN 107513201 A CN107513201 A CN 107513201A CN 201710850141 A CN201710850141 A CN 201710850141A CN 107513201 A CN107513201 A CN 107513201A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
- D01F1/106—Radiation shielding agents, e.g. absorbing, reflecting agents
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/16—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds as constituent
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/12—Applications used for fibers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
Abstract
The present invention provides a kind of woven bag silk of UV resistant, and mass fraction shared by its constituent and each composition is respectively：Ldpe resin：77~105 parts, polyester imine resin：11~15 parts, ultra-violet absorber：1~5 part, sorbierite：2~5 parts, di-n-octyl sebacate：2~4 parts, filler：33~45 parts, auxiliary agent：2~7 parts；The mass fraction of auxiliary agent gross mass is respectively shared by the constituent of auxiliary agent and each composition：Lubricant：3~5 parts, coupling agent：2~5 parts, stabilizer：1~2 part, crosslinking agent：1~2 part, antioxidant：1~3 part.Constituent of the present invention and proportioning are unique, while preparation method simple and fast；Also there is outstanding temperature tolerance and weatherability while outstanding UV resistant performance is ensured, for maintaining the every mechanical performance and ultra-violet resistance of woven bag bodies that there is remarkable result；Component easily obtains, lower cost, is adapted to promote in medium-sized and small enterprises.
Description
Technical field
The invention belongs to packed and transported technical field, and in particular to a kind of woven bag silk of UV resistant.
Background technology
Woven bag is also known as snakeskin bag, is one kind of polybag, and for packing, its raw material is usually polyethylene, polypropylene etc.
Various Xylonite raw materials, it is mainly used in storage transport article；Due to the limitation of storage environment, existing woven bag is in extraneous sunlight
Long-time irradiation under, not only color easily changes, and its surface also easily produces bubble, and bulging, and each occurs
Woven bag silk also has the generation of cracking phenomena, has had a strong impact on its properties；
Therefore, it is that those skilled in the art are badly in need of to solve problem above to develop a kind of woven bag of UV resistant with silk
The problem of solution.
The content of the invention
To solve the above problems, the invention discloses a kind of woven bag silk of UV resistant；
In order to achieve the above object, the present invention provides following technical scheme：
Mass fraction shared by a kind of woven bag silk of UV resistant, its constituent and each composition is respectively：Low-density is gathered
Vinyl：77~105 parts, polyester imine resin：11~15 parts, ultra-violet absorber：1~5 part, sorbierite：2~5 parts, the last of the ten Heavenly stems
Adipate：2~4 parts, filler：33~45 parts, auxiliary agent：2~7 parts；Auxiliary agent shared by the constituent of auxiliary agent and each composition
The mass fraction of gross mass is respectively：Lubricant：3~5 parts, coupling agent：2~5 parts, stabilizer：1~2 part, crosslinking agent：1~2
Part, antioxidant：1~3 part；
Further, the mass fraction of filler gross mass shared by the constituent of filler and each composition is respectively：Silica
Aeroge：3~7 parts, ceramic powders：1~3 part, composite fibre：2~5 parts；
Further, composite fibre by silicate fiber and carbon fiber according to mass ratio 3~5:1 kneading forms；
Further, its preparation method is：
（1）Auxiliary agent prepares：
Lubricant in auxiliary agent, stabilizer and antioxidant are respectively divided into two parts, and be respectively combined into the first adjuvant with
Second adjuvant, it is standby；
（2）Make knitted thread substrate material：
Ldpe resin and polyester imine resin are taken, together with ultra-violet absorber, crosslinking agent and the first adjuvant
Sequentially add in mixer, be well mixed at a temperature of 65~100 DEG C, obtain knitted thread substrate material, and be incubated standby；
（3）Filler activator：
Filler is taken, is added together with coupling agent and the second adjuvant in high mixer, is mixed at a temperature of 100~125 DEG C
15~30min of activation is closed, obtains Activation filling；
（4）Dynamic vulcanization：
By step（3）The Activation filling of middle acquisition is added to step（2）In the knitted thread substrate material of middle acquisition, and sequentially add
Sorbierite and di-n-octyl sebacate are added in high mixer, and 15~25min of melt blending, is obtained at a temperature of 100~125 DEG C
The knitted thread substrate grain of micron level；
（5）Obtain finished product braided wires：
By step（4）The knitted thread substrate grain of middle acquisition, which is put into screw extruder, to be extruded, and obtains finished product braided wires；
Further, lubricant is low-molecular polyethylene wax；Coupling agent is rare earth aluminic acid ester；Crosslinking agent is peroxidating diisopropyl
Benzene；Antioxidant is 2,4- dimethyl -6- tert-butyl phenols；
Further, ldpe resin and the mass ratio of polyester imine resin and filler are 7:1:3；
Further, mass fraction shared by its constituent and each composition is respectively：Ldpe resin：91 parts, it is poly-
Ester imide resin：13 parts, ultra-violet absorber：3 parts, sorbierite：4 parts, di-n-octyl sebacate：3 parts, filler：39 parts, auxiliary agent：5
Part；
The invention provides a kind of woven bag silk of UV resistant, by ldpe resin, polyester imine resin, ultraviolet
Light absorbers, sorbierite, di-n-octyl sebacate, filler and auxiliary agent composition；Wherein ldpe resin and polyester-imide
Making main body of the resin as woven bag silk of the present invention, both the outstanding anti-stress cracking with ldpe resin and
Creep-resistant property, while also there is the outstanding mechanical strength of polyester imine resin and radiation-resistant property；Ultra-violet absorber
Addition can make the ultraviolet part of the invention effectively absorbed in sunlight and fluorescence light source, while can ensure this body structure not
Change；Sorbierite coordinate di-n-octyl sebacate can effectively be lifted the present invention cold resistance, make the present invention at low temperature according to
It is old that there is outstanding flexibility；Filler is made up of aerosil, ceramic powders and composite fibre in the present invention, dioxy
SiClx aeroge can effectively ensure that finished product has outstanding heat-proof quality, will effectively be obstructed inside and outside woven bag；Ceramic powder
End has preferable intensity and outstanding chemical stability and heat endurance, and low-density can be effectively improved as inserts
The properties of polyvinyl resin and polyester imine resin；Composite fibre selection by silicate fiber and carbon fiber it is compound and
Into, silicate temperature tolerance is outstanding, carbon fiber axial strength and modulus are high, density is low, it is higher than performance, without creep, non-oxide ring
Superhigh temperature resistant, fatigue durability are good under border, and thermal coefficient of expansion is small, with after silicate fiber composite molding, not only light, machine
Tool excellent performance, and high temperature resistant weather resistance is strong, is filled as filler into resin, can effectively improve its mechanical strength with
And heat-resisting quantity；
Simultaneously present invention also offers specific preparation method, step is simple, producing efficiency is high, is adapted to promote；
Compared with prior art, constituent and proportioning are unique, while preparation method simple and fast by the present invention；It is outstanding in guarantee
Also there is outstanding temperature tolerance and weatherability, every mechanical performance for maintaining woven bag bodies while UV resistant performance
And ultra-violet resistance has remarkable result；Component easily obtains, lower cost, is adapted to promote in medium-sized and small enterprises.
Embodiment
Technical scheme provided by the invention is described in detail below with reference to specific embodiment, it should be understood that following specific
Embodiment is only illustrative of the invention and is not intended to limit the scope of the invention；
Embodiment 1：
Mass fraction shared by a kind of woven bag silk of UV resistant, its constituent and each composition is respectively：Low-density is gathered
Vinyl：77 parts, polyester imine resin：11 parts, ultra-violet absorber：5 parts, sorbierite：5 parts, di-n-octyl sebacate：4 parts,
Filler：33 parts, auxiliary agent：7 parts；The mass fraction of filler gross mass is respectively shared by the constituent of filler and each composition：Two
Silica aerogel：3 parts, ceramic powders：3 parts, composite fibre：5 parts, wherein composite fibre is pressed by silicate fiber and carbon fiber
According to mass ratio 3:1 kneading forms；The mass fraction of auxiliary agent gross mass is respectively shared by the constituent of auxiliary agent and each composition：Profit
Lubrication prescription：3 parts, coupling agent：5 parts, stabilizer：2 parts, crosslinking agent：2 parts, antioxidant：3 parts；Wherein lubricant is low molecular weight polycaprolactone second
Alkene wax；Coupling agent is rare earth aluminic acid ester；Crosslinking agent is cumyl peroxide；Antioxidant is 2, the 4- dimethyl -6- tert-butyl groups
Phenol；
Its preparation method is：
（1）Auxiliary agent prepares：
Lubricant in auxiliary agent, stabilizer and antioxidant are respectively divided into two parts, and be respectively combined into the first adjuvant with
Second adjuvant, it is standby；
（2）Make knitted thread substrate material：
Ldpe resin and polyester imine resin are taken, together with ultra-violet absorber, crosslinking agent and the first adjuvant
Sequentially add in mixer, be well mixed at a temperature of 65~100 DEG C, obtain knitted thread substrate material, and be incubated standby；
（3）Filler activator：
Filler is taken, is added together with coupling agent and the second adjuvant in high mixer, the admixture activation at a temperature of 100 DEG C
15min, obtain Activation filling；
（4）Dynamic vulcanization：
By step（3）The Activation filling of middle acquisition is added to step（2）In the knitted thread substrate material of middle acquisition, and sequentially add
Sorbierite and di-n-octyl sebacate are added in high mixer, and melt blending 15min, obtains micron level at a temperature of 100 DEG C
Knitted thread substrate grain；
（5）Obtain finished product braided wires：
By step（4）The knitted thread substrate grain of middle acquisition, which is put into screw extruder, to be extruded, and obtains finished product braided wires；
Embodiment 2：
Mass fraction shared by a kind of woven bag silk of UV resistant, its constituent and each composition is respectively：Low-density is gathered
Vinyl：105 parts, polyester imine resin：15 parts, ultra-violet absorber：1 part, sorbierite：2 parts, di-n-octyl sebacate：2
Part, filler：45 parts, auxiliary agent：2 parts；The mass fraction of filler gross mass is respectively shared by the constituent of filler and each composition：
Aerosil：7 parts, ceramic powders：1 part, composite fibre：2 parts, wherein composite fibre is by silicate fiber and carbon fiber
According to mass ratio 5:1 kneading forms；The mass fraction of auxiliary agent gross mass is respectively shared by the constituent of auxiliary agent and each composition：
Lubricant：5 parts, coupling agent：2 parts, stabilizer：1 part, crosslinking agent：1 part, antioxidant：1 part；Wherein lubricant is low molecular weight polycaprolactone
Ethylene waxes；Coupling agent is rare earth aluminic acid ester；Crosslinking agent is cumyl peroxide；Antioxidant is the tertiary fourths of 2,4- dimethyl -6-
Base phenol；
Its preparation method is：
（1）Auxiliary agent prepares：
Lubricant in auxiliary agent, stabilizer and antioxidant are respectively divided into two parts, and be respectively combined into the first adjuvant with
Second adjuvant, it is standby；
（2）Make knitted thread substrate material：
Ldpe resin and polyester imine resin are taken, together with ultra-violet absorber, crosslinking agent and the first adjuvant
Sequentially add in mixer, be well mixed at a temperature of 100 DEG C, obtain knitted thread substrate material, and be incubated standby；
（3）Filler activator：
Filler is taken, is added together with coupling agent and the second adjuvant in high mixer, the admixture activation at a temperature of 125 DEG C
30min, obtain Activation filling；
（4）Dynamic vulcanization：
By step（3）The Activation filling of middle acquisition is added to step（2）In the knitted thread substrate material of middle acquisition, and sequentially add
Sorbierite and di-n-octyl sebacate are added in high mixer, and melt blending 25min, obtains micron level at a temperature of 125 DEG C
Knitted thread substrate grain；
（5）Obtain finished product braided wires：
By step（4）The knitted thread substrate grain of middle acquisition, which is put into screw extruder, to be extruded, and obtains finished product braided wires；
Embodiment 3：
Mass fraction shared by a kind of woven bag silk of UV resistant, its constituent and each composition is respectively：Low-density is gathered
Vinyl：91 parts, polyester imine resin：13 parts, ultra-violet absorber：3 parts, sorbierite：4 parts, di-n-octyl sebacate：3 parts,
Filler：39 parts, auxiliary agent：5 parts；The mass fraction of filler gross mass is respectively shared by the constituent of filler and each composition：Two
Silica aerogel：5 parts, ceramic powders：2 parts, composite fibre：3 parts, wherein composite fibre is pressed by silicate fiber and carbon fiber
According to mass ratio 4:1 kneading forms；The mass fraction of auxiliary agent gross mass is respectively shared by the constituent of auxiliary agent and each composition：Profit
Lubrication prescription：4 parts, coupling agent：3 parts, stabilizer：1 part, crosslinking agent：2 parts, antioxidant：2 parts；Wherein lubricant is low molecular weight polycaprolactone second
Alkene wax；Coupling agent is rare earth aluminic acid ester；Crosslinking agent is cumyl peroxide；Antioxidant is 2, the 4- dimethyl -6- tert-butyl groups
Phenol；
Its preparation method is：
（1）Auxiliary agent prepares：
Lubricant in auxiliary agent, stabilizer and antioxidant are respectively divided into two parts, and be respectively combined into the first adjuvant with
Second adjuvant, it is standby；
（2）Make knitted thread substrate material：
Ldpe resin and polyester imine resin are taken, together with ultra-violet absorber, crosslinking agent and the first adjuvant
Sequentially add in mixer, be well mixed at a temperature of 85 DEG C, obtain knitted thread substrate material, and be incubated standby；
（3）Filler activator：
Filler is taken, is added together with coupling agent and the second adjuvant in high mixer, the admixture activation at a temperature of 120 DEG C
25min, obtain Activation filling；
（4）Dynamic vulcanization：
By step（3）The Activation filling of middle acquisition is added to step（2）In the knitted thread substrate material of middle acquisition, and sequentially add
Sorbierite and di-n-octyl sebacate are added in high mixer, and melt blending 20min, obtains micron level at a temperature of 120 DEG C
Knitted thread substrate grain；
（5）Obtain finished product braided wires：
By step（4）The knitted thread substrate grain of middle acquisition, which is put into screw extruder, to be extruded, and obtains finished product braided wires；
Woven bag silk is prepared by three above embodiment respectively, is placed in enclosed environment, it is carried out using ultraviolet
Irradiation, observes its change；For woven bag silk in embodiment 1 after ultraviolet prolonged exposure 3 days, surface color is substantially thin out,
The appearance of simultaneous bubble, surface are cracked；Woven bag silk in embodiment 2 after ultraviolet prolonged exposure 5 days,
Surface color is substantially thin out, the appearance of simultaneous bubble, and surface is cracked；And the woven bag silk in embodiment 3 exists
After ultraviolet prolonged exposure 10 days, also only there is the thin out situation of color, not the appearance of bubble and crackle；Therefore implement
Example 3 is the most preferred embodiment in three embodiments；
It is last it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention and non-limiting technical scheme,
It will be understood by those within the art that technical scheme is modified for those or equivalent substitution, without
Depart from the objective and scope of the technical program, all should cover among scope of the presently claimed invention.
Claims (7)
- A kind of 1. woven bag silk of UV resistant, it is characterised in that：Mass fraction shared by its constituent and each composition point It is not：Ldpe resin：77~105 parts,Polyester imine resin：11~15 parts,Ultra-violet absorber：1~5 part,Sorbierite：2~5 parts,Di-n-octyl sebacate：2~4 parts,Filler：33~45 parts,Auxiliary agent：2~7 parts；The mass fraction of auxiliary agent gross mass is respectively shared by the constituent of the auxiliary agent and each composition：Lubricant：3~5 parts, Coupling agent：2~5 parts, stabilizer：1~2 part, crosslinking agent：1~2 part, antioxidant：1~3 part.
- A kind of 2. woven bag silk of UV resistant according to claim 1, it is characterised in that：The composition of the filler into Point and each composition shared by the mass fraction of filler gross mass be respectively：Aerosil：3~7 parts, ceramic powders：1~ 3 parts, composite fibre：2~5 parts.
- A kind of 3. woven bag silk of UV resistant according to claim 2, it is characterised in that：The composite fibre is by silicon Silicate fiber is with carbon fiber according to mass ratio 3~5:1 kneading forms.
- A kind of 4. woven bag silk of UV resistant according to claim 1, it is characterised in that：Its preparation method is：（1）Auxiliary agent prepares：Lubricant in auxiliary agent, stabilizer and antioxidant are respectively divided into two parts, and be respectively combined into the first adjuvant with Second adjuvant, it is standby；（2）Make knitted thread substrate material：Ldpe resin and polyester imine resin are taken, together with ultra-violet absorber, crosslinking agent and the first adjuvant Sequentially add in mixer, be well mixed at a temperature of 65~100 DEG C, obtain knitted thread substrate material, and be incubated standby；（3）Filler activator：Filler is taken, is added together with coupling agent and the second adjuvant in high mixer, is mixed at a temperature of 100~125 DEG C 15~30min of activation is closed, obtains Activation filling；（4）Dynamic vulcanization：By step（3）The Activation filling of middle acquisition is added to step（2）In the knitted thread substrate material of middle acquisition, and sequentially add Sorbierite and di-n-octyl sebacate are added in high mixer, and 15~25min of melt blending, is obtained at a temperature of 100~125 DEG C The knitted thread substrate grain of micron level；（5）Obtain finished product braided wires：By step（4）The knitted thread substrate grain of middle acquisition, which is put into screw extruder, to be extruded, and obtains finished product braided wires.
- A kind of 5. woven bag silk of UV resistant according to claim 1, it is characterised in that：The lubricant is low point Sub- Tissuemat E；The coupling agent is rare earth aluminic acid ester；The crosslinking agent is cumyl peroxide；The antioxidant is 2, 4- dimethyl -6- tert-butyl phenols.
- A kind of 6. woven bag silk of UV resistant according to claim 1, it is characterised in that：The low density polyethylene (LDPE) Resin is 7 with the mass ratio of polyester imine resin and filler:1:3.
- A kind of 7. woven bag silk of UV resistant according to claim 1, it is characterised in that：Its constituent and each Mass fraction is respectively shared by composition：Ldpe resin：91 parts,Polyester imine resin：13 parts,Ultra-violet absorber：3 parts,Sorbierite：4 parts,Di-n-octyl sebacate：3 parts,Filler：39 parts,Auxiliary agent：5 parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710850141.6A CN107513201A (en) | 2017-09-20 | 2017-09-20 | A kind of woven bag silk of UV resistant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710850141.6A CN107513201A (en) | 2017-09-20 | 2017-09-20 | A kind of woven bag silk of UV resistant |
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| CN107513201A true CN107513201A (en) | 2017-12-26 |
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| CN201710850141.6A Pending CN107513201A (en) | 2017-09-20 | 2017-09-20 | A kind of woven bag silk of UV resistant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118641A (en) * | 2018-10-31 | 2020-05-08 | 迁安市胜北塑料制品厂 | Train professional bulk grain bag and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118641A (en) * | 2018-10-31 | 2020-05-08 | 迁安市胜北塑料制品厂 | Train professional bulk grain bag and preparation method thereof |
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Application publication date: 20171226 |
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