CN104877224A - Method for improving longitudinal and transverse strength difference of environmentally-friendly paper through two-way stretching machine - Google Patents
Method for improving longitudinal and transverse strength difference of environmentally-friendly paper through two-way stretching machine Download PDFInfo
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- CN104877224A CN104877224A CN201510330483.6A CN201510330483A CN104877224A CN 104877224 A CN104877224 A CN 104877224A CN 201510330483 A CN201510330483 A CN 201510330483A CN 104877224 A CN104877224 A CN 104877224A
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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
-
- 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
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
-
- 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
- B29C2791/00—Shaping characteristics in general
- B29C2791/001—Shaping in several steps
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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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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
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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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The invention provides a method for improving longitudinal and transverse strength difference of environmentally-friendly paper through a two-way stretching machine. The method is characterized by comprising the steps of adding 20 to 35 parts by weight of high-density polyethylene, 65 to 80 parts by weight of coarse whiting, 0.3 to 0.7 part by weight of tween, 0.2 to 0.8 part by weight of polyethylene glycol, 0.5 to 2.5 parts by weight of sodium oleate, and 0.05 to 0.5 part by weight of an antioxidant 1010 to an internal mixer; mixing until the temperature of 160 to 190 DEG C; feeding the mixed materials into an extruder; extruding a melt; feeding the melt into a calendar through a T-shaped die head; calendaring into plates at the temperature of 140 to 160 DEG C; cooling the plates from the calendar through air with relative humidity of 50 to 100% until reaching the temperature less than 50 DEG C; feeding the plates into the two-way stretching machine to perform two-way stretching, so as to obtain the environmentally-friendly paper as requirement.
Description
Technical field
The present invention relates to a kind of method that biaxial orientation stretching machine improves environment protecting paper vertical transverse strength difference.
Background technology
The synthetic paper in past take high molecular polymer as main raw material, and calcium carbonate is auxiliary material, and calcium carbonate content is less than 40%, so not only cost is relatively high, and depends on oil, and its development is subject to certain restrictions.This technology obtains larger development recently, and calcium carbonate is main raw material, and content is up to 80%, and high molecular polymer is auxiliary material, and content is less than 30%, by the application of various new technology, makes it have the characteristic of plastics and paper simultaneously.The production process of environment protecting paper is pollution-free, can reclaim, recycle, is a major reform of modern paper production.As novel paper kind, the premium properties of environment protecting paper is more and more obvious, and purposes is also more and more extensive, and be extended to many frontiers, many product innovations are constantly developed.Environment protecting paper has had the development history of three more than ten years abroad, and along with the reinforcement of global environmental consciousness, general fibre paper causes a large amount of pollution, accelerates the development of environment protecting paper, and new environment protecting paper kind constantly occurs, expands the range of application of environment protecting paper.
Chinese invention patent CN02157263 provides one and relates to multilayer synthetic paper technical field, comprise synthetic paper surface layer, middle layer and internal layer three layers to extrude respectively, extrude through blowfilm shaping to finished product through triple extrusion die head again, finished product after shaping is again through off-line stretch forming process, and off-line stretch forming process comprises preheating, heating, stretching, sizing, refrigerating work procedure.Invention increases off-line stretch forming process and equipment thereof, the different speed of a motor vehicle, temperature, equipment and stretch ratio is adopted in different process section, reach best effect, in stretching integer process, due to the change of temperature and the effect of external pull, arrangement and the crystal habit of plastic molecules also change, thus product surface planeness is improved, and also improve quality product.Present invention process is simple, reasonable, effective, also can be used for the manufacture field of thermoplastic film.
Chinese invention patent CN1651649 provides a kind of preparation method of environment-friendly novel synthetic paper.Synthetic paper is made up of 30 ~ 50wt% polyolefin blends, 40 ~ 60wt% natural inorganic mineral powder and 5 ~ 10wt% auxiliary agent.Natural inorganic mineral powder and vector resin first through twin screw extruder granulation, make master batch, mixed with polyolefin blend and auxiliary agent by master batch, through twin screw extruder, the extrusion of T-shaped die head, two roller stretch forming equipment, to make different thickness fabric width be 100 ~ 1000cm again.
Chinese invention patent CN1480326 relates to synthetic paper production technical field, it comprises upper layer, internal layer and middle layer, upper layer, internal layer adopt dedicated parent material for synthetic paper, and middle layer adopts and comprises the combination of high density polyethylene(HDPE), metallocene-polyolefin and Low Density Polyethylene and raw material through being processed into.
Chinese invention patent CN1480485 relates to production synthetic paper raw material technical field, and it comprises ultra-fine CaCO
3, TiO
2, high density polyethylene, low density polyethylene and auxiliary agent, form through processing and fabricating, CaCO
3, TiO
2, HDPE, LDPE and auxiliary agent total amount per-cent account for 30 ~ 45%, 8 ~ 13%, 30 ~ 40%, 8 ~ 13% respectively, all the other are auxiliary agent.
Chinese invention patent CN1509860 relates to multilayer synthetic paper technical field, comprise synthetic paper surface layer, middle layer and internal layer three layers to extrude respectively, extrude through blowfilm shaping to finished product through triple extrusion die head again, finished product after shaping is again through off-line stretch forming process, and off-line stretch forming process comprises preheating, heating, stretching, sizing, refrigerating work procedure.
The present invention adopts tween, sodium oleate joins in formula, obtain tween in process in banburying, sodium oleate can form microporosity on the interface of high density polyethylene(HDPE), water-ground limestone, this microporosity can expand in the process of sheet material stretching, produce larger hole, thus the porosity in sheet material is increased, reduce further the density of sheet material.Meanwhile, sheet material is in the process stretched, and polyethylene molecular chain is stretched, and makes sheet material become flexible, intensity increases.Another object adding the polyoxyethylene glycol of high molecular makes that sheet material becomes soft, flexible, is easy to stretch, not easy fracture in drawing process, the paper good mechanical properties manufactured thus.In addition, the present invention adopts and first carries out longitudinal stretching, then carry out cross directional stretch, the environment protecting paper longitudinal strength obtained like this is substantially identical with transverse strength, and the vertical transverse strength eliminating environment protecting paper is poor, makes the environment protecting paper range of application that obtains more extensive.
Summary of the invention
A kind of biaxial orientation stretching machine improves the method for environment protecting paper vertical transverse strength difference, it is characterized in that: be 20 ~ 35 parts by high density polyethylene(HDPE) by weight, water-ground limestone is 65 ~ 80 parts, tween is 0.3 ~ 0.7 part, polyoxyethylene glycol is 0.2 ~ 0.8 part, sodium oleate is 0.5 ~ 2.5 part, antioxidant 1010 is 0.05 ~ 0.5 part and joins in Banbury mixer, reach 160 ~ 190 DEG C through banburying to temperature; Then sent in forcing machine by the material after banburying, melt extrusion is sent in rolling press through T-shaped die head, prolongs into sheet material the temperatures of 140 ~ 160 DEG C; Rolling press sheet material relative humidity is out below the air cooling to 50 DEG C of 50 ~ 100%; Then send in biaxial orientation stretching machine by sheet material, sheet material is introduced into longitudinal stretching machine, is heated to 110 ~ 130 DEG C through roller, carries out longitudinal stretching; Enter transverse drawing mill again, through infrared heating to 110 ~ 130 DEG C, carry out cross directional stretch, obtain the environment protecting paper needed;
The heat fusing flow index MFI of described high density polyethylene(HDPE) is for being less than 1.0;
The order number of described water-ground limestone is 400 ~ 2500 orders;
Described tween is one or more in polysorbas20,40,60,80;
The molecular-weight average of described polyoxyethylene glycol is 3000 ~ 20000;
The longitudinal stretching ratio of described sheet material in biaxial orientation stretching machine is 1. 5 ~ 3.5, and cross directional stretch ratio is 1. 5 ~ 3.5.
Synthetic paper tensile strength is tested by the mensuration of GB/T T12914-2008 paper and paperboard tensile strength.
Embodiment
Embodiment 1
Be the high density polyethylene(HDPE) 20kg of 0.6 by heat fusing flow index MFI, 1200 order water-ground limestone 80kg, tween 0.3kg, molecular-weight average be 20000 polyoxyethylene glycol 0.2kg, sodium oleate 2.5kg, antioxidant 1010 0.2kg join in Banbury mixer, when banburying to temperature reaches 190 DEG C, stop banburying; Sent in forcing machine by material after banburying, extrusion temperature controls at 200 DEG C, and melt extrusion is sent in rolling press through T-shaped die head, prolongs into sheet material the temperatures of 176 DEG C, and the thickness of sheet material is 238 μm, and width is 800mm; Rolling press sheet material relative humidity is out the air cooling to 42 DEG C of 70%; Then send in biaxial orientation stretching machine by sheet material, sheet material is introduced into longitudinal stretching machine, and be first preheated to 122 DEG C through oily warming mill, carry out longitudinal stretching, draw ratio is 2.0; Enter transverse drawing mill again, through infrared heating to 122 DEG C, carry out cross directional stretch, draw ratio is 2.0, and obtain the environmental protection synthetic paper needed, the synthetic paper thickness obtained 230 μm, longitudinal strength is 3.6kN/m, transverse strength is 3.5kN/m.
Embodiment 2
Be the high density polyethylene(HDPE) 24kg of 0.2 by heat fusing flow index MFI, 1200 order water-ground limestone 76kg, tween 0.8kg, molecular-weight average be 6000 polyoxyethylene glycol 0.8kg, sodium oleate 0.5kg, antioxidant 1010 0.08kg join in Banbury mixer, when banburying to temperature reaches 160 DEG C, stop banburying; Sent in forcing machine by material after banburying, extrusion temperature controls at 200 DEG C, and melt extrusion is sent in rolling press through T-shaped die head, prolongs into sheet material the temperatures of 151 DEG C, and the thickness of sheet material is 226 μm, and width is 800mm; Rolling press sheet material relative humidity is out the air cooling to 45 DEG C of 85%; Then send in biaxial orientation stretching machine by sheet material, sheet material is introduced into longitudinal stretching machine, and be first preheated to 128 DEG C through oily warming mill, carry out longitudinal stretching, draw ratio is 1.6; Enter transverse drawing mill again, through infrared heating to 128 DEG C, carry out cross directional stretch, draw ratio is 1.6, and obtain the environmental protection synthetic paper needed, the synthetic paper thickness obtained 220 μm, longitudinal strength is 3.1kN/m, transverse strength is 3.2kN/m.
Embodiment 3
Be the high density polyethylene(HDPE) 33kg of 0.09 by heat fusing flow index MFI, 800 order water-ground limestone 67kg, tween 0.5kg, molecular-weight average be 15000 polyoxyethylene glycol 0.5kg, sodium oleate 1.5kg, antioxidant 1010 0.1kg join in Banbury mixer, when banburying to temperature reaches 170 DEG C, stop banburying; Sent in forcing machine by material after banburying, extrusion temperature controls at 200 DEG C, and melt extrusion is sent in rolling press through T-shaped die head, prolongs into sheet material the temperatures of 158 DEG C, and the thickness of sheet material is 218 μm, and width is 800mm; Rolling press sheet material relative humidity is out the air cooling to 35 DEG C of 80%; Then send in biaxial orientation stretching machine by sheet material, sheet material is introduced into longitudinal stretching machine, and be first preheated to 118 DEG C through oily warming mill, carry out longitudinal stretching, draw ratio is 2.7; Enter transverse drawing mill again, through infrared heating to 118 DEG C, carry out cross directional stretch, draw ratio is 2.7, and obtain the environmental protection synthetic paper needed, the synthetic paper thickness obtained 200 μm, longitudinal strength is 3.4kN/m, transverse strength is 3.3kN/m.
Embodiment 4
Be the high density polyethylene(HDPE) 35kg of 0.3 by heat fusing flow index MFI, 2000 order water-ground limestone 65kg, tween 0.5kg, molecular-weight average be 3000 polyoxyethylene glycol 0.6kg, sodium oleate 0.6kg, antioxidant 1010 0.4kg join in Banbury mixer, when banburying to temperature reaches 173 DEG C, stop banburying; Sent in forcing machine by material after banburying, extrusion temperature controls at 200 DEG C, and melt extrusion is sent in rolling press through T-shaped die head, prolongs into sheet material the temperatures of 150 DEG C, and the thickness of sheet material is 232 μm, and width is 800mm; Rolling press sheet material relative humidity is out the air cooling to 50 DEG C of 90%; Then send in biaxial orientation stretching machine by sheet material, sheet material is introduced into longitudinal stretching machine, and be first preheated to 122 DEG C through oily warming mill, carry out longitudinal stretching, draw ratio is 2.1; Enter transverse drawing mill again, through infrared heating to 122 DEG C, carry out cross directional stretch, draw ratio is 2.1, and obtain the environmental protection synthetic paper needed, the synthetic paper thickness obtained 220 μm, longitudinal strength is 3.4kN/m, transverse strength is 3.4kN/m.
Embodiment 5
Be the high density polyethylene(HDPE) 25kg of 0.5 by heat fusing flow index MFI, 1800 order water-ground limestone 75kg, tween 0.4kg, molecular-weight average be 10000 polyoxyethylene glycol 0.4kg, sodium oleate 1.6kg, antioxidant 1010 0.2kg join in Banbury mixer, when banburying to temperature reaches 182 DEG C, stop banburying; Sent in forcing machine by material after banburying, extrusion temperature controls at 200 DEG C, and melt extrusion is sent in rolling press through T-shaped die head, prolongs into sheet material the temperatures of 155 DEG C, and the thickness of sheet material is 212 μm, and width is 800mm; Rolling press sheet material relative humidity is out the air cooling to 45 DEG C of 100%; Then send in biaxial orientation stretching machine by sheet material, sheet material is introduced into longitudinal stretching machine, and be first preheated to 128 DEG C through oily warming mill, carry out longitudinal stretching, draw ratio is 3.5; Enter transverse drawing mill again, through infrared heating to 128 DEG C, carry out cross directional stretch, draw ratio is 3.5, and obtain the environmental protection synthetic paper needed, the synthetic paper thickness obtained 180 μm, longitudinal strength is 2.8kN/m, transverse strength is 2.8kN/m.
Embodiment 6
Be the high density polyethylene(HDPE) 31kg of 0.1 by heat fusing flow index MFI, 400 order water-ground limestone 69kg, tween 0.6kg, molecular-weight average be 12000 polyoxyethylene glycol 0.7kg, sodium oleate 1.8kg, antioxidant 1010 0.09kg join in Banbury mixer, when banburying to temperature reaches 179 DEG C, stop banburying; Sent in forcing machine by material after banburying, extrusion temperature controls at 200 DEG C, and melt extrusion is sent in rolling press through T-shaped die head, prolongs into sheet material the temperatures of 150 DEG C, and the thickness of sheet material is 218 μm, and width is 800mm; Rolling press sheet material relative humidity is out the air cooling to 30 DEG C of 50%; Then send in biaxial orientation stretching machine by sheet material, sheet material is introduced into longitudinal stretching machine, and be first preheated to 126 DEG C through oily warming mill, carry out longitudinal stretching, draw ratio is 3.0; Enter transverse drawing mill again, through infrared heating to 126 DEG C, carry out cross directional stretch, draw ratio is 3.0, and obtain the environmental protection synthetic paper needed, the synthetic paper thickness obtained 190 μm, longitudinal strength is 3.2kN/m, transverse strength is 3.3kN/m.
Claims (1)
1. one kind is improved the method for environment protecting paper vertical transverse strength difference with biaxial orientation stretching machine, it is characterized in that: be 20 ~ 35 parts by high density polyethylene(HDPE) by weight, water-ground limestone is 65 ~ 80 parts, tween is 0.3 ~ 0.7 part, polyoxyethylene glycol is 0.2 ~ 0.8 part, sodium oleate is 0.5 ~ 2.5 part, antioxidant 1010 is 0.05 ~ 0.5 part and joins in Banbury mixer, reach 160 ~ 190 DEG C through banburying to temperature; Then sent in forcing machine by the material after banburying, melt extrusion is sent in rolling press through T-shaped die head, prolongs into sheet material the temperatures of 140 ~ 160 DEG C; Rolling press sheet material relative humidity is out below the air cooling to 50 DEG C of 50 ~ 100%; Then send in biaxial orientation stretching machine by sheet material, sheet material is introduced into longitudinal stretching machine, is heated to 110 ~ 130 DEG C through roller, carries out longitudinal stretching; Enter transverse drawing mill again, through infrared heating to 110 ~ 130 DEG C, carry out cross directional stretch, obtain the environment protecting paper needed;
The heat fusing flow index MFI of described high density polyethylene(HDPE) is for being less than 1.0;
The order number of described water-ground limestone is 400 ~ 2500 orders;
Described tween is one or more in polysorbas20,40,60,80;
The molecular-weight average of described polyoxyethylene glycol is 3000 ~ 20000;
The longitudinal stretching ratio of described sheet material in biaxial orientation stretching machine is 1. 5 ~ 3.5, and cross directional stretch ratio is 1. 5 ~ 3.5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510330483.6A CN104877224A (en) | 2015-06-16 | 2015-06-16 | Method for improving longitudinal and transverse strength difference of environmentally-friendly paper through two-way stretching machine |
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| CN201510330483.6A CN104877224A (en) | 2015-06-16 | 2015-06-16 | Method for improving longitudinal and transverse strength difference of environmentally-friendly paper through two-way stretching machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112980073A (en) * | 2021-02-05 | 2021-06-18 | 江苏厚生新能源科技有限公司 | Self-cleaning microporous membrane material capable of removing grease and preparation method thereof |
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| EP1118452A1 (en) * | 1999-09-13 | 2001-07-25 | Nan Ya Plastics Corporation | A process for producing a three layers co-extrusion biaxially oriented polypropylene synthetic paper of thickness 25-250 My m |
| CN102219950A (en) * | 2011-04-27 | 2011-10-19 | 华东理工大学 | Preparation method of highly filled polyethylene synthetic paper |
| CN102226022A (en) * | 2011-04-27 | 2011-10-26 | 华东理工大学 | Manufacture method of heavy calcium carbonate and polyethylene composite environmentally-friendly paper |
| CN102453321A (en) * | 2010-10-25 | 2012-05-16 | 中国石油化工股份有限公司 | Preparation method for biodegradable synthetic paper |
-
2015
- 2015-06-16 CN CN201510330483.6A patent/CN104877224A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1118452A1 (en) * | 1999-09-13 | 2001-07-25 | Nan Ya Plastics Corporation | A process for producing a three layers co-extrusion biaxially oriented polypropylene synthetic paper of thickness 25-250 My m |
| CN102453321A (en) * | 2010-10-25 | 2012-05-16 | 中国石油化工股份有限公司 | Preparation method for biodegradable synthetic paper |
| CN102219950A (en) * | 2011-04-27 | 2011-10-19 | 华东理工大学 | Preparation method of highly filled polyethylene synthetic paper |
| CN102226022A (en) * | 2011-04-27 | 2011-10-26 | 华东理工大学 | Manufacture method of heavy calcium carbonate and polyethylene composite environmentally-friendly paper |
Non-Patent Citations (1)
| Title |
|---|
| 李勇峰等: ""合成纸的现状及发展前景"", 《上海塑料》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112980073A (en) * | 2021-02-05 | 2021-06-18 | 江苏厚生新能源科技有限公司 | Self-cleaning microporous membrane material capable of removing grease and preparation method thereof |
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