CN104788807A - High-strength polypropylene packaging bag and preparation method thereof - Google Patents
High-strength polypropylene packaging bag and preparation method thereof Download PDFInfo
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- CN104788807A CN104788807A CN201510146969.4A CN201510146969A CN104788807A CN 104788807 A CN104788807 A CN 104788807A CN 201510146969 A CN201510146969 A CN 201510146969A CN 104788807 A CN104788807 A CN 104788807A
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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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- 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
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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
- 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
-
- 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)
Abstract
The invention discloses a high-strength polypropylene packaging bag and a preparation method thereof. The high-strength polypropylene packaging bag comprises the following raw materials: polypropylene, a coupling agent, glass fibers, white oil, LDPE, an antioxidant 1010, DCP, calcium stearate, calcium carbonate and POE. The high-strength polypropylene packaging bag has high notch impact resistant strength, the tensile strength is 220-260 MPa, and the breaking elongation rate is 500-900%; the Vicat softening point is 125-145 DEG C, and the bending strength is 25-45 MPa; the high-strength polypropylene packaging bag is resistant to heat and corrosion, the raw materials are simple and easy to obtain, the preparation method is simple, and the notch impact strength is 65-75 kJ/m2, so that the high-strength polypropylene packaging bag can be widely produced and continuously used for replacing the existing materials.
Description
Technical field
The present invention relates to field of packaging material, particularly relate to a kind of high-strength polypropylene food bag and preparation method thereof.
Background technology
High-strength polypropylene plastic material, chemical name: polypropylene, feature: density is little, intensity and toughness, hardness thermotolerance is all better than low pressure polyethylene, can about 100 degree uses.There is good electrical property and high-frequency insulation not by humidity effect, but become fragile during low temperature, not wear-resisting, easily aging.Be suitable for making common mechanical part, corrosion-resistant part and insulating part.See from the market, annual domestic polyacrylic aggregate demand more than 350 ten thousand tons, wherein polypropylene dedicated material is more than 1,000,000 tons.Grafting method for modification polypropylene demand, in 100,000 tons/year of levels, is mainly used in: as blended in nylon, polycarbonate, rubber etc. with other polymer materialss, prepares novel high polymer material; Add filler as inorganic powder, glass fibre, natural fiber etc., prepare high-strength polypropylene; Further converted products, for powder coating, liquid coating etc.Current China isotatic polypropylene solid phase graft-modification method still belongs to blank, and do not have this series products to put goods on the market, required vacancy mainly relies on import, and the modified polypropene product price that German Hoechst AG promotes in China is 15000 ~ 18000 yuan/ton.
Filling-modified is add relatively inexpensive non-metallic mineral powder material or other material in the plastic, thus reduces the material cost of goods, can also improve some performance of plastic material, such as rigidity, hardness and thermotolerance etc. simultaneously.Normally used non-ore deposit powder body material has calcium carbonate (fine particle calcium carbonate, coarse whiting), talcum powder, mica powder, kaolin, wollastonite powder, aluminium hydroxide, magnesium hydroxide or brucite powder, process white or ground barium sulfate etc.Polypropylene also comprises the multipolymer of propylene and a small amount of ethene.Be generally translucent colorless solid, odorless is nontoxic.The highly crystallized due to compound with regular structure, therefore fusing point can up to 167 DEG C.Heat-resisting, corrosion-resistant, the sterilization of goods used vapour is its outstanding advantages.Density is little, is the lightest general-purpose plastics.Shortcoming is that low-temperature impact resistance is poor, more aging, but can be overcome respectively by modification.
In blending and modifying, must be noted that the consistency between different polymkeric substance, when two kinds of polymer blendings that consistency is poor, often need to add all good three components of respectively with two kinds of polymer compatibility, be referred to as compatilizer.The consistency extreme difference of such as polypropylene and nylon-6, the strength of Single Mechanical can not mix the two, now as added the polypropylene being grafted with MALEIC ANHYDRIDE a little, because the amide group of MALEIC ANHYDRIDE and nylon-6 chemical reaction can occur, the consistency of polypropylene and nylon-6 just greatly can be improved.The vicat softening temperature of high-strength polypropylene is 150 DEG C.Because degree of crystallinity is higher, surface rigidity and the anti-scratch characteristic of this material are fine.There is not environmental stress cracking problem in high-strength polypropylene.Usually, adopt add glass fibre, the method for metal additive or thermoplastic rubber carries out modification to high-strength polypropylene.The polypropylene material of copolymer type has lower heat-drawn wire (100 DEG C), low transparency, low-luster, low rigidity, but has stronger anti-notched Izod impact strength, and polyacrylic notched Izod impact strength increases along with the increase of ethylene content.Polyacrylic vicat softening temperature is 150 DEG C.Because degree of crystallinity is higher, surface rigidity and the anti-scratch characteristic of this material are fine.There is not environmental stress cracking problem in polypropylene.
High-strength polypropylene film accounts for about 10% of high-strength polypropylene consumption, its feature be the transparency and surface luster close to glassine paper, but flexibility is bad, and hand has rubbed strong sound; Intensity is high, can be used for heavy wrapping material; Oxygen transmission rate is only 30% of HDPE film, is applicable to Plastic Products Co., Ltd's moisture-proof packaging material, such as the packaging of high-grade clothes, medicine, cigarette etc.The resistance toheat of high-strength polypropylene film is good, can carry out scalding, for freezing and packaging that is fresh-keeping foodstuff.Fibrous material joins in plastics, can significantly improve the intensity of plastic material, therefore be referred to as enhancing modified.The material of large radius-thickness ratio can significantly improve the modulus in flexure (rigidity) of plastic material, also can be referred to as enhancing modified.
High-strength polypropylene fiber goods mainly comprise monofilament, flat filament, fiber three class.The density of high-strength polypropylene monofilament is little, good toughness, wear resistance are good, is applicable to produce rope, fishing net etc.High strength polypropylene ribbon-like filament tensile strength is high, is applicable to produce woven bag, is used for alternative traditional gunnysack.High-strength polypropylene woven bag has high strength, is usually used in the packaging of chemical fertilizer, cement, grain, sugar, mineral powder, industrial chemicals.High strength polypropylene ribbon-like filament can also production woven cloth, for tent, weather cloth, colour bar cloth etc.Glass fibre is main strongthener, can significantly improve the tensile strength of PP plastics.Glass fiber content is generally no more than 40%, and it is generally acknowledged has modified effect when staple length is greater than 0.2mm, and diameter effect when tens microns of its glass is better.When glass fiber content increases, strengthen the corresponding decline of processing fluidity of PP, but still belong to the good plastics of mobility.
Because fiberglass reinforced PP can improve physical strength and thermotolerance, and water-fast vapor permeability, the chemical resistance of fiberglass reinforced PP and creep resistant all fine, can use as engineering plastics in many occasions, as fan blade, warm-air drier grid, wing pump, lampshade, electric furnace and heater case etc.Reinforced Polypropylene (reinforced polypropylene) is the mixture of polypropylene and glass fibre or organic fibre, asbestos or mineral filler (talcum powder, calcium carbonate).Usual employing adds glass fibre, powder additives or elastomeric method and carries out modification to polypropylene.The glass fibre adding 30% can make shrinking percentage drop to 0.7%.The polypropylene material of homopolymer type and copolymer type all has excellent resistance to water soak, antiacid caustic corrosion, resist dissolution.But it does not have resistibility to aromatic hydrocarbon (as benzene) solvent, chlorinated hydrocarbon (tetracol phenixin) solvent etc.Polypropylene does not resemble PE yet at high temperature still has oxidation-resistance.Containing the fiber of 10 ~ 30% in the glass-reinforced polypropylene of general industry.Owing to having good thermotolerance and dimensional stability containing glass fibre.Reinforced Polypropylene, mainly for the manufacture of various mechanical component, mainly comprises automobile fan, air-conditioning fan, filter bottle of water purifier, can be used for all kinds of household appliance appearance part and substitutes ABS, HIPS, be widely used in refrigerator top cover, base plate of air conditioner, Pediluvium apparatus etc. at electrical apparatus industry.
Summary of the invention
The invention provides a kind of notched Izod impact strength high, high-strength polypropylene food bag that tensile strength is high and preparation method thereof, solve the technical problems such as the low and tensile strength of existing food bag notched Izod impact strength is low.
The present invention is by the following technical solutions: a kind of high-strength polypropylene food bag, it is as follows that mass fraction proportioning pressed by its raw material: polypropylene 100 parts, coupling agent 0.2-0.6 part, glass fibre 45-65 part, white oil 0.2-0.8 part, LDPE15-35 part, antioxidant 1010 is 0.1-0.5 part, DCP0.04-0.08 part, calcium stearate 2-6 part, calcium carbonate 1-2 part, POE1-20 part.
As a preferred technical solution of the present invention: it is as follows that mass fraction proportioning pressed by the raw material of described high-strength polypropylene food bag: polypropylene 100 parts, coupling agent 0.3-0.5 part, glass fibre 50-60 part, white oil 0.4-0.6 part, LDPE20-30 part, antioxidant 1010 is 0.2-0.4 part, DCP0.05-0.07 part, calcium stearate 3-5 part, calcium carbonate 1.2-1.8 part, POE5-15 part.
As a preferred technical solution of the present invention: it is as follows that mass fraction proportioning pressed by the raw material of described high-strength polypropylene food bag: polypropylene 100 parts, coupling agent 0.4 part, 55 parts, glass fibre, white oil 0.5 part, LDPE25 part, antioxidant 1010 is 0.3 part, DCP0.06 part, calcium stearate 4 parts, 1.5 parts, calcium carbonate, POE10 part.
As a preferred technical solution of the present invention: described coupling agent adopts titanate coupling agent or silane coupling agent.
Prepare a method for described high-strength polypropylene food bag, step is:
The first step: take polypropylene, coupling agent, glass fibre, white oil, LDPE, antioxidant 1010, DCP, calcium stearate, calcium carbonate and POE according to mass fraction proportioning;
Second step: all raw materials are dropped in high-speed mixer and mixes, mixing machine temperature 90-100 DEG C, mixing 10-20min;
3rd step: mixed material drops in twin screw extruder, extruder temperature 120-160 DEG C, 160-180 DEG C, 180-220 DEG C, 220-260 DEG C, 260-280 DEG C, head temperature 250-280 DEG C, forcing machine rotating speed 10-14r/min, L/D is 18-22, draw ratio 8-10 times, cooling trough water temperature 20-40 DEG C.
beneficial effect
A kind of high-strength polypropylene food bag of the present invention and preparation method thereof adopts above technical scheme compared with prior art, there is following technique effect: 1, product has good anti-notched Izod impact strength, tensile strength 220-260MPa, elongation at break 500-900%; 2, Vicat softening point 125-145 DEG C, flexural strength 25-45MPa; 3, product is heat-resisting, corrosion-resistant, and raw material is simple and easy to get, and preparation method is simple, notched Izod impact strength 65-75kJ/m
2, the widespread production not division of history into periods can replace current material.
Embodiment
Below in conjunction with example, the invention will be further described, and embodiment, only for the present invention will be described, does not form the restriction to right, and other alternative means that it may occur to persons skilled in the art that, all within the scope of the claims in the present invention.
Embodiment 1:
The first step: take polypropylene 100 parts according to mass fraction proportioning, silane coupling agent 0.2 part, 45 parts, glass fibre, white oil 0.2 part, LDPE15 part, antioxidant 1010 is 0.1 part, DCP0.04 part, calcium stearate 2 parts, 1 part, calcium carbonate, POE1 part.
Second step: all raw materials are dropped in high-speed mixer and mixes, mixing machine temperature 90 DEG C, mixing 10-20min.
3rd step: mixed material drops in twin screw extruder, extruder temperature 120 DEG C, 160 DEG C, 180 DEG C, 220 DEG C, 260 DEG C, head temperature 250 DEG C, forcing machine rotating speed 10r/min, L/D are 18, draw ratio 8 times, cooling trough water temperature 20 DEG C.
Product tensile strength 220MPa, elongation at break 500%; Vicat softening point 125 DEG C, flexural strength 25MPa, notched Izod impact strength 65kJ/m
2.
Embodiment 2:
The first step: take polypropylene 100 parts according to mass fraction proportioning, silane coupling agent 0.6 part, 65 parts, glass fibre, white oil 0.8 part, LDPE35 part, antioxidant 1010 is 0.5 part, DCP0.08 part, calcium stearate 6 parts, 2 parts, calcium carbonate, POE20 part.
Second step: all raw materials are dropped in high-speed mixer and mixes, mixing machine temperature 100 DEG C, mixing 20min.
3rd step: mixed material drops in twin screw extruder, extruder temperature 160 DEG C, 180 DEG C, 220 DEG C, 260 DEG C, 280 DEG C, head temperature 280 DEG C, forcing machine rotating speed 14r/min, L/D are 22, draw ratio 10 times, cooling trough water temperature 40 DEG C.
Product tensile strength 230MPa, elongation at break 600%; Vicat softening point 130 DEG C, flexural strength 30MPa, notched Izod impact strength 68kJ/m
2.
Embodiment 3:
The first step: take polypropylene 100 parts according to mass fraction proportioning, titanate coupling agent 0.3 part, 50 parts, glass fibre, white oil 0.4 part, LDPE20 part, antioxidant 1010 is 0.2 part, DCP0.05 part, calcium stearate 3 parts, 1.2 parts, calcium carbonate, POE5 part.
Second step: all raw materials are dropped in high-speed mixer and mixes, mixing machine temperature 90 DEG C, mixing 10min.
3rd step: mixed material drops in twin screw extruder, extruder temperature 120 DEG C, 160 DEG C, 180 DEG C, 220 DEG C, 260 DEG C, head temperature 250 DEG C, forcing machine rotating speed 10r/min, L/D are 18, draw ratio 8 times, cooling trough water temperature 20 DEG C.
Product tensile strength 240MPa, elongation at break 700%; Vicat softening point 135 DEG C, flexural strength 35MPa, notched Izod impact strength 70kJ/m
2.
Embodiment 4:
The first step: take polypropylene 100 parts according to mass fraction proportioning, titanate coupling agent 0.5 part, 60 parts, glass fibre, white oil 0.6 part, LDPE30 part, antioxidant 1010 is 0.4 part, DCP0.07 part, calcium stearate 5 parts, 1.8 parts, calcium carbonate, POE15 part.
Second step: all raw materials are dropped in high-speed mixer and mixes, mixing machine temperature 100 DEG C, mixing 20min.
3rd step: mixed material drops in twin screw extruder, extruder temperature 160 DEG C, 180 DEG C, 220 DEG C, 260 DEG C, 280 DEG C, head temperature 280 DEG C, forcing machine rotating speed 14r/min, L/D are 22, draw ratio 10 times, cooling trough water temperature 40 DEG C.
Product tensile strength 250MPa, elongation at break 800%; Vicat softening point 140 DEG C, flexural strength 40MPa, notched Izod impact strength 73kJ/m
2.
Embodiment 5:
The first step: take polypropylene 100 parts according to mass fraction proportioning, titanate coupling agent 0.4 part, 55 parts, glass fibre, white oil 0.5 part, LDPE25 part, antioxidant 1010 is 0.3 part, DCP0.06 part, calcium stearate 4 parts, 1.5 parts, calcium carbonate, POE10 part.
Second step: all raw materials are dropped in high-speed mixer and mixes, mixing machine temperature 95 DEG C, mixing 15min.
3rd step: mixed material drops in twin screw extruder, extruder temperature 140 DEG C, 170 DEG C, 200 DEG C, 240 DEG C, 270 DEG C, head temperature 260 DEG C, forcing machine rotating speed 12r/min, L/D are 20, draw ratio 9 times, cooling trough water temperature 30 DEG C.
Product tensile strength 260MPa, elongation at break 900%; Vicat softening point 145 DEG C, flexural strength 45MPa, notched Izod impact strength 75kJ/m
2.
Claims (5)
1. a high-strength polypropylene food bag, it is characterized in that, it is as follows that mass fraction proportioning pressed by the raw material of described high-strength polypropylene food bag: polypropylene 100 parts, coupling agent 0.2-0.6 part, glass fibre 45-65 part, white oil 0.2-0.8 part, LDPE15-35 part, antioxidant 1010 is 0.1-0.5 part, DCP0.04-0.08 part, calcium stearate 2-6 part, calcium carbonate 1-2 part, POE1-20 part.
2. a kind of high-strength polypropylene food bag according to claim 1, it is characterized in that, it is as follows that mass fraction proportioning pressed by the raw material of described high-strength polypropylene food bag: polypropylene 100 parts, coupling agent 0.3-0.5 part, glass fibre 50-60 part, white oil 0.4-0.6 part, LDPE20-30 part, antioxidant 1010 is 0.2-0.4 part, DCP0.05-0.07 part, calcium stearate 3-5 part, calcium carbonate 1.2-1.8 part, POE5-15 part.
3. a kind of high-strength polypropylene food bag according to claim 2, it is characterized in that, it is as follows that mass fraction proportioning pressed by the raw material of described high-strength polypropylene food bag: polypropylene 100 parts, coupling agent 0.4 part, 55 parts, glass fibre, white oil 0.5 part, LDPE25 part, antioxidant 1010 is 0.3 part, DCP0.06 part, calcium stearate 4 parts, 1.5 parts, calcium carbonate, POE10 part.
4. a kind of high-strength polypropylene food bag according to claim 1, is characterized in that: described coupling agent adopts titanate coupling agent or silane coupling agent.
5. make a method for high-strength polypropylene food bag according to claim 1, it is characterized in that, comprise the steps:
The first step: take polypropylene, coupling agent, glass fibre, white oil, LDPE, antioxidant 1010, DCP, calcium stearate, calcium carbonate and POE according to mass fraction proportioning;
Second step: all raw materials are dropped in high-speed mixer and mixes, mixing machine temperature 90-100 DEG C, mixing 10-20min;
3rd step: mixed material drops in twin screw extruder, extruder temperature 120-160 DEG C, 160-180 DEG C, 180-220 DEG C, 220-260 DEG C, 260-280 DEG C, head temperature 250-280 DEG C, forcing machine rotating speed 10-14r/min, L/D is 18-22, draw ratio 8-10 times, cooling trough water temperature 20-40 DEG C.
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Cited By (9)
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| CN105754220A (en) * | 2016-04-01 | 2016-07-13 | 苏州市鼎立包装有限公司 | Preparation method of anti-tensile packing belt |
| CN105906758A (en) * | 2016-04-27 | 2016-08-31 | 苏州市鼎立包装有限公司 | Durable package bag and production method thereof |
| CN106928553A (en) * | 2017-04-21 | 2017-07-07 | 浙江海威包装有限公司 | A kind of ageing-resistant toughened plastics woven bag material |
| CN107201029A (en) * | 2017-05-27 | 2017-09-26 | 巢湖市强力渔业有限责任公司 | A kind of fishing net of high intensity |
| CN109161148A (en) * | 2018-08-24 | 2019-01-08 | 天津泰玛科技有限公司 | A kind of modified polypropene and preparation method thereof, PP composite material and its preparation method and application |
| CN110643116A (en) * | 2019-09-17 | 2020-01-03 | 重庆科林包装制品有限公司 | High-strength polyolefin composite material for packaging bag and preparation method thereof |
| CN111393753A (en) * | 2020-05-29 | 2020-07-10 | 樊雪梅 | High-strength heat-resistant plastic |
| CN112457588A (en) * | 2020-11-18 | 2021-03-09 | 天津金发新材料有限公司 | Glass fiber reinforced polypropylene material with low gloss, good appearance and high impact |
| CN113789009A (en) * | 2021-11-01 | 2021-12-14 | 苏州优矿塑新材料股份有限公司 | Polypropylene material and preparation method and application thereof |
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Application publication date: 20150722 |