CN107057306A - A kind of flexible packing material environmentally-friendly plastic - Google Patents
A kind of flexible packing material environmentally-friendly plastic Download PDFInfo
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- CN107057306A CN107057306A CN201710363092.3A CN201710363092A CN107057306A CN 107057306 A CN107057306 A CN 107057306A CN 201710363092 A CN201710363092 A CN 201710363092A CN 107057306 A CN107057306 A CN 107057306A
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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
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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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
- 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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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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
- C08L2312/00—Crosslinking
Abstract
The invention discloses a kind of flexible packing material environmentally-friendly plastic, its raw material includes by weight：100 120 parts of base material, 4,4 pairs of 1 1.5 parts of (t-butyl peroxy) n-butyl pentanoates, 0.4 0.8 parts of dibutyl tin laurate, 1,1 pair of 2 2.8 parts of (t-amyl peroxy) hexamethylene, 50 60 parts of inserts, 48 parts of epoxidized soybean oil, 1.5 2.5 parts of calcium stearate, 1.6 1.8 parts of zinc stearate, 57 parts of hydroxy silicon oil, 0.5 1.5 parts of antioxidant, 12 parts of ultra-violet absorber, 12 parts of dispersant, 0.5 1.3 parts of light stabilizer.It is of the invention to use green, environmentally friendly, degradable polylactic resin, by the proportioning of preferred each raw material, intensity, toughness and the heat resistance of the present invention is improved, production cost is reduced, general-purpose plastics can be replaced, can more preferable environmental protection.
Description
Technical field
The present invention relates to plastics arts, more particularly to a kind of flexible packing material environmentally-friendly plastic.
Background technology
With continuing to develop for science and technology, resource, the energy day are becoming tight, and environmental problem will be protruded more.Current plastics Soft Roll
Although package material is developed rapidly, stern challenge is likewise subjected to, following plastic bag product is except meeting different product
Outside the technical requirements that packaging quality and efficiency etc. are increasingly improved, also require that it must be opened to save resource, save the energy as technology
The starting point of hair, realizes polybag industry high-performance, development that is multi-functional, environmentally friendly and widening application field.And current China
Environmental protection plastic products toughness is weak, poor heat resistance.
The content of the invention
The technical problem existed based on background technology, the present invention proposes a kind of flexible packing material environmentally-friendly plastic, uses
Green, environmentally friendly, degradable polylactic resin, by the proportioning of preferred each raw material, improves the intensity of the present invention, toughness and resistance to
Hot property, reduces production cost, can replace general-purpose plastics, can more preferable environmental protection.
A kind of flexible packing material environmentally-friendly plastic proposed by the present invention, its raw material includes by weight：Base material 100-120
Part, 4,4- double -1-1.5 parts of (t-butyl peroxy) n-butyl pentanoates, 0.4-0.8 parts of dibutyl tin laurate, 1,1- double-(uncle
Amyl peroxy) 2-2.8 parts of hexamethylene, 50-60 parts of inserts, 4-8 parts of epoxidized soybean oil, 1.5-2.5 parts of calcium stearate, stearic acid
1.6-1.8 parts of zinc, 5-7 parts of hydroxy silicon oil, 0.5-1.5 parts of antioxidant, 1-2 parts of ultra-violet absorber, 1-2 parts of dispersant, light
0.5-1.3 parts of stabilizer.
Preferably, inserts includes by weight：6-10 parts of aluminium borate whisker, 10-16 parts of sepiolite, expanded perlite
10-20 parts, 10-14 parts of powdered whiting.
Preferably, base material includes by weight：60-80 parts of polylactic resin, 40-50 parts of low density polyethylene (LDPE) compound.
Preferably, low density polyethylene (LDPE) compound is prepared using following technique：Microcrystalline cellulose, water are well mixed, plus
Enter isopropanol, maleic anhydride to be well mixed, add sulfuric acid solution, heat up, stirring in water bath, regulation system pH value is in neutrality, decompression
Water removal and isopropanol are removed in distillation, add abienol, titanate esters, and heating stirring adds low density polyethylene (LDPE) melt blending, and feeding is double
Screw extruder extrusion obtains low density polyethylene (LDPE) compound.
Preferably, low density polyethylene (LDPE) compound is prepared using following technique：By weight by 15-20 parts of microcrystalline celluloses
Element, 60-80 parts of water are well mixed, and are added 3-5 parts of isopropanols, 4-8 parts of maleic anhydrides and are well mixed, addition concentration is 10-
12wt% sulfuric acid solutions, heating, stirring in water bath, regulation system pH value is in neutrality, and water removal and isopropanol are removed in vacuum distillation, adds 4-
8 parts of abienols, 2-4 parts of titanate esters, heating stirring, add 7-9 parts of low density polyethylene (LDPE) melt blendings, send into double screw extruder
Extrusion obtains low density polyethylene (LDPE) compound.
Preferably, low density polyethylene (LDPE) compound is prepared using following technique：By weight by 15-20 parts of microcrystalline celluloses
Element, 60-80 parts of water are well mixed, and are added 3-5 parts of isopropanols, 4-8 parts of maleic anhydrides and are well mixed, addition concentration is 10-
12wt% sulfuric acid solutions, are warming up to 75-85 DEG C, stirring in water bath 8-10h, regulation system pH value is in neutrality, water removal is gone in vacuum distillation
With isopropanol, 4-8 parts of abienols, 2-4 parts of titanate esters are added, 130-140 DEG C of stirring 50-70min is warming up to, adds 7-9 parts low
Density polyethylene is with 2800-3200rpm rotating speed melt blending 70-90min, feeding double screw extruder extrusion, wherein extruding
Temperature is 240-260 DEG C, and screw speed is 250-300rpm, obtains low density polyethylene (LDPE) compound.
The present invention provides a kind of environmentally-friendly plastic, using green, environmentally friendly, degradable polylactic resin, adds a variety of auxiliary agents,
By the proportioning of each preferred component, intensity, toughness and the heat resistance of the present invention is improved, production cost is reduced, can
Replace general-purpose plastics, can more preferable environmental protection.
The present invention use low density polyethylene (LDPE) compound and polylactic resin for base material, through 1,1- pairs-(t-amyl peroxy)
Hexamethylene, 4,4- pairs-(t-butyl peroxy) n-butyl pentanoate, dibutyl tin laurate mating reaction, crosslinking are closely knit, thermally-stabilised
Property good, good toughness, elongation at break is high, and resistance to tearing can be good；In low density polyethylene (LDPE) compound, microcrystalline cellulose and Malaysia
After acid anhydrides crosslinking, handled with abienol, titanate esters blending, surface viscosity is high, good with low density polyethylene (LDPE) compatibility, form a kind of
The particle of nucleocapsid clad structure, not only with good interface, and can be dispersed with low density polyethylene (LDPE), form Soft Roll hard
Nucleocapsid structure, toughness and intensity has increase, and significantly, it has preferable compatibility to antioxidant effect with polylactic resin；And
Low density polyethylene (LDPE) compound can effectively promote aluminium borate with zinc stearate, calcium stearate, epoxidized soybean oil, hydroxy silicon oil cooperation
Good dispersion between whisker, sepiolite, expanded perlite, powdered whiting, mutual good penetrability can effectively reduce the present invention's
Inner void and defect, toughness are further enhanced with heat endurance, on the premise of hardness is ensured, resistance to tearing can be fabulous, and
And can effectively slow down the aging speed of the present invention, service life is long, and cost of material is extremely low, is easy to industrialized production.
Embodiment
Below, technical scheme is described in detail by specific embodiment.
Embodiment 1
A kind of flexible packing material environmentally-friendly plastic proposed by the present invention, its raw material includes by weight：100 parts of base material, 4,
4- pairs -1.5 parts of (t-butyl peroxy) n-butyl pentanoate, 0.4 part of dibutyl tin laurate, 1,1- double-(t-amyl peroxy) ring
2.8 parts of hexane, 50 parts of inserts, 8 parts of epoxidized soybean oil, 1.5 parts of calcium stearate, 1.8 parts of zinc stearate, 5 parts of hydroxy silicon oil resists
1.5 parts of oxidant, 1 part of ultra-violet absorber, 2 parts of dispersant, 0.5 part of light stabilizer.
Embodiment 2
A kind of flexible packing material environmentally-friendly plastic proposed by the present invention, its raw material includes by weight：120 parts of base material, 4,
4- pairs -1 part of (t-butyl peroxy) n-butyl pentanoate, 0.8 part of dibutyl tin laurate, 1,1- double-(t-amyl peroxy) hexamethylene
2 parts of alkane, 60 parts of inserts, 4 parts of epoxidized soybean oil, 2.5 parts of calcium stearate, 1.6 parts of zinc stearate, 7 parts of hydroxy silicon oil is anti-oxidant
0.5 part of agent, 2 parts of ultra-violet absorber, 1 part of dispersant, 1.3 parts of light stabilizer.
Base material includes by weight：80 parts of polylactic resin, 40 parts of low density polyethylene (LDPE) compound.Inserts is by weight
Including：10 parts of aluminium borate whisker, 10 parts of sepiolite, 20 parts of expanded perlite, 10 parts of powdered whiting.
Low density polyethylene (LDPE) compound is prepared using following technique：Microcrystalline cellulose, water are well mixed, isopropyl is added
Alcohol, maleic anhydride are well mixed, and add sulfuric acid solution, and heating, stirring in water bath, regulation system pH value is gone in neutrality, vacuum distillation
Water removal and isopropanol, add abienol, titanate esters, and heating stirring adds low density polyethylene (LDPE) melt blending, and feeding twin-screw is squeezed
Go out machine extrusion and obtain low density polyethylene (LDPE) compound.
Embodiment 3
A kind of flexible packing material environmentally-friendly plastic proposed by the present invention, its raw material includes by weight：105 parts of base material, 4,
4- pairs -1.4 parts of (t-butyl peroxy) n-butyl pentanoate, 0.5 part of dibutyl tin laurate, 1,1- double-(t-amyl peroxy) ring
2.6 parts of hexane, 52 parts of inserts, 7 parts of epoxidized soybean oil, 1.8 parts of calcium stearate, 1.75 parts of zinc stearate, hydroxy silicon oil 5.5
Part, 1.2 parts of antioxidant, 1.2 parts of ultra-violet absorber, 1.7 parts of dispersant, 0.7 part of light stabilizer.
Base material includes by weight：60 parts of polylactic resin, 50 parts of low density polyethylene (LDPE) compound.Inserts is by weight
Including：6 parts of aluminium borate whisker, 16 parts of sepiolite, 10 parts of expanded perlite, 14 parts of powdered whiting.
Low density polyethylene (LDPE) compound is prepared using following technique：18 parts of microcrystalline celluloses, 70 parts of water are mixed by weight
Close uniform, add 4 parts of isopropanols, 6 parts of maleic anhydrides and be well mixed, addition concentration is 11wt% sulfuric acid solutions, and heating, water-bath is stirred
Mix, regulation system pH value is in neutrality, and water removal and isopropanol are removed in vacuum distillation, adds 6 parts of abienols, 3 parts of titanate esters, and heating is stirred
Mix, add 8 parts of low density polyethylene (LDPE) melt blendings, feeding double screw extruder extrusion obtains low density polyethylene (LDPE) compound.
Embodiment 4
A kind of flexible packing material environmentally-friendly plastic proposed by the present invention, its raw material includes by weight：115 parts of base material, 4,
4- pairs -1.2 parts of (t-butyl peroxy) n-butyl pentanoate, 0.7 part of dibutyl tin laurate, 1,1- double-(t-amyl peroxy) ring
2.2 parts of hexane, 58 parts of inserts, 5 parts of epoxidized soybean oil, 2.2 parts of calcium stearate, 1.65 parts of zinc stearate, hydroxy silicon oil 6.5
Part, 0.8 part of antioxidant, 1.8 parts of ultra-violet absorber, 1.3 parts of dispersant, 1.1 parts of light stabilizer.
Base material includes by weight：65 parts of polylactic resin, 47 parts of low density polyethylene (LDPE) compound.Inserts is by weight
Including：7 parts of aluminium borate whisker, 14 parts of sepiolite, 12 parts of expanded perlite, 13 parts of powdered whiting.
Low density polyethylene (LDPE) compound is prepared using following technique：15 parts of microcrystalline celluloses, 80 parts of water are mixed by weight
Close uniform, add 3 parts of isopropanols, 8 parts of maleic anhydrides and be well mixed, addition concentration is 10wt% sulfuric acid solutions, is warming up to 85 DEG C,
Stirring in water bath 8h, regulation system pH value is in neutrality, and water removal and isopropanol are removed in vacuum distillation, adds 8 parts of abienols, 2 parts of titanate esters,
140 DEG C of stirring 50min are warming up to, 9 parts of low density polyethylene (LDPE)s are added with 2800rpm rotating speed melt blending 90min, the double spiral shells of feeding
Bar extruder is extruded, and wherein extrusion temperature is 240 DEG C, and screw speed is 300rpm, obtains low density polyethylene (LDPE) compound.
Embodiment 5
A kind of flexible packing material environmentally-friendly plastic proposed by the present invention, its raw material includes by weight：110 parts of base material, 4,
4- pairs -1.3 parts of (t-butyl peroxy) n-butyl pentanoate, 0.6 part of dibutyl tin laurate, 1,1- double-(t-amyl peroxy) ring
2.4 parts of hexane, 55 parts of inserts, 6 parts of epoxidized soybean oil, 2 parts of calcium stearate, 1.7 parts of zinc stearate, 6 parts of hydroxy silicon oil, antioxygen
1 part of agent, 1.5 parts of ultra-violet absorber, 1.5 parts of dispersant, 0.9 part of light stabilizer.
Base material includes by weight：70 parts of polylactic resin, 45 parts of low density polyethylene (LDPE) compound.Inserts is by weight
Including：8 parts of aluminium borate whisker, 13 parts of sepiolite, 15 parts of expanded perlite, 12 parts of powdered whiting.
Low density polyethylene (LDPE) compound is prepared using following technique：20 parts of microcrystalline celluloses, 60 parts of water are mixed by weight
Close uniform, add 5 parts of isopropanols, 4 parts of maleic anhydrides and be well mixed, addition concentration is 12wt% sulfuric acid solutions, is warming up to 75 DEG C,
Stirring in water bath 10h, regulation system pH value is in neutrality, and water removal and isopropanol are removed in vacuum distillation, adds 4 parts of abienols, 4 parts of metatitanic acids
Ester, is warming up to 130 DEG C of stirring 70min, adds 7 parts of low density polyethylene (LDPE)s with 3200rpm rotating speed melt blending 70min, feeding
Double screw extruder is extruded, and wherein extrusion temperature is 260 DEG C, and screw speed is 250rpm, obtains low density polyethylene (LDPE) compound.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (6)
1. a kind of flexible packing material environmentally-friendly plastic, it is characterised in that its raw material includes by weight：100-120 parts of base material, 4,
4- pairs -1-1.5 parts of (t-butyl peroxy) n-butyl pentanoate, 0.4-0.8 parts of dibutyl tin laurate, 1,1- double-(tertiary pentyl mistake
Oxygen) 2-2.8 parts of hexamethylene, 50-60 parts of inserts, 4-8 parts of epoxidized soybean oil, 1.5-2.5 parts of calcium stearate, zinc stearate 1.6-
1.8 parts, 5-7 parts of hydroxy silicon oil, 0.5-1.5 parts of antioxidant, 1-2 parts of ultra-violet absorber, 1-2 parts of dispersant, light stabilizer
0.5-1.3 parts.
2. flexible packing material environmentally-friendly plastic according to claim 1, it is characterised in that inserts includes by weight：Boron
Sour al whisker 6-10 parts, 10-16 parts of sepiolite, 10-20 parts of expanded perlite, 10-14 parts of powdered whiting.
3. flexible packing material environmentally-friendly plastic according to claim 1 or claim 2, it is characterised in that base material includes by weight：It is poly-
60-80 parts of lactic acid resin, 40-50 parts of low density polyethylene (LDPE) compound.
4. flexible packing material environmentally-friendly plastic according to claim 3, it is characterised in that low density polyethylene (LDPE) compound is used
It is prepared by following technique：Microcrystalline cellulose, water are well mixed, isopropanol, maleic anhydride is added and is well mixed, add sulfuric acid molten
Liquid, heating, stirring in water bath, regulation system pH value is in neutrality, and water removal and isopropanol are removed in vacuum distillation, adds abienol, titanate esters,
Heating stirring, adds low density polyethylene (LDPE) melt blending, and feeding double screw extruder extrusion obtains low density polyethylene (LDPE) compound.
5. the flexible packing material environmentally-friendly plastic according to claim 3 or 4, it is characterised in that low density polyethylene (LDPE) compound
Prepared using following technique：15-20 parts of microcrystalline celluloses, 60-80 parts of water are well mixed by weight, 3-5 parts of isopropyls are added
Alcohol, 4-8 part maleic anhydride are well mixed, and addition concentration is 10-12wt% sulfuric acid solutions, heating, stirring in water bath, regulation system pH
Value is in neutrality, and water removal and isopropanol are removed in vacuum distillation, adds 4-8 parts of abienols, 2-4 parts of titanate esters, and heating stirring adds 7-9
Part low density polyethylene (LDPE) melt blending, feeding double screw extruder extrusion obtains low density polyethylene (LDPE) compound.
6. according to any one of the claim 3-5 flexible packing material environmentally-friendly plastics, it is characterised in that low density polyethylene (LDPE) is multiple
Compound is prepared using following technique：15-20 parts of microcrystalline celluloses, 60-80 parts of water are well mixed by weight, 3-5 parts are added
Isopropanol, 4-8 part maleic anhydride are well mixed, and addition concentration is 10-12wt% sulfuric acid solutions, is warming up to 75-85 DEG C, water-bath is stirred
8-10h is mixed, regulation system pH value is in neutrality, and water removal and isopropanol are removed in vacuum distillation, adds 4-8 parts of abienols, 2-4 parts of metatitanic acids
Ester, is warming up to 130-140 DEG C of stirring 50-70min, adds 7-9 parts of low density polyethylene (LDPE)s and melted with 2800-3200rpm rotating speed
70-90min is blended, feeding double screw extruder is extruded, and wherein extrusion temperature is 240-260 DEG C, and screw speed is 250-
300rpm, obtains low density polyethylene (LDPE) compound.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710363092.3A CN107057306A (en) | 2017-05-22 | 2017-05-22 | A kind of flexible packing material environmentally-friendly plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710363092.3A CN107057306A (en) | 2017-05-22 | 2017-05-22 | A kind of flexible packing material environmentally-friendly plastic |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0980894A1 (en) * | 1998-03-05 | 2000-02-23 | Mitsui Chemicals, Inc. | Polylactic acid composition and film thereof |
| US20060194010A1 (en) * | 2005-02-28 | 2006-08-31 | Don Hiscock | Packaging structure including a degradable tie layer |
| CN101153082A (en) * | 2006-09-27 | 2008-04-02 | 丰田合成株式会社 | Polylactic acid based resin molded articles |
| CN101875764A (en) * | 2010-06-30 | 2010-11-03 | 中国蓝星（集团）股份有限公司 | Formable polylactic resin composition and preparation method for plastic strip thereof |
| CN103044747A (en) * | 2012-12-13 | 2013-04-17 | 新昌县冠阳技术开发有限公司 | Environment-friendly type green plastic bag product |
| CN104788766A (en) * | 2015-04-25 | 2015-07-22 | 阜阳强松机械制造有限公司 | Highly wear-resistant rubber material |
| CN105924763A (en) * | 2016-06-29 | 2016-09-07 | 安徽徽隆包装有限公司 | Preparation method of plastic package bag for food |
-
2017
- 2017-05-22 CN CN201710363092.3A patent/CN107057306A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0980894A1 (en) * | 1998-03-05 | 2000-02-23 | Mitsui Chemicals, Inc. | Polylactic acid composition and film thereof |
| US20060194010A1 (en) * | 2005-02-28 | 2006-08-31 | Don Hiscock | Packaging structure including a degradable tie layer |
| CN101153082A (en) * | 2006-09-27 | 2008-04-02 | 丰田合成株式会社 | Polylactic acid based resin molded articles |
| CN101875764A (en) * | 2010-06-30 | 2010-11-03 | 中国蓝星（集团）股份有限公司 | Formable polylactic resin composition and preparation method for plastic strip thereof |
| CN103044747A (en) * | 2012-12-13 | 2013-04-17 | 新昌县冠阳技术开发有限公司 | Environment-friendly type green plastic bag product |
| CN104788766A (en) * | 2015-04-25 | 2015-07-22 | 阜阳强松机械制造有限公司 | Highly wear-resistant rubber material |
| CN105924763A (en) * | 2016-06-29 | 2016-09-07 | 安徽徽隆包装有限公司 | Preparation method of plastic package bag for food |
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Application publication date: 20170818 |