CN103341980A - Production method of multilayer composite packing belts - Google Patents
Production method of multilayer composite packing belts Download PDFInfo
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- CN103341980A CN103341980A CN2013102068057A CN201310206805A CN103341980A CN 103341980 A CN103341980 A CN 103341980A CN 2013102068057 A CN2013102068057 A CN 2013102068057A CN 201310206805 A CN201310206805 A CN 201310206805A CN 103341980 A CN103341980 A CN 103341980A
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Abstract
The invention discloses a production method of multilayer composite packing belts, and solves problems of producing high-quality packing belts through more than two kinds of materials with different rheologically physical and chemical properties. The method comprises plasticizing and melting materials in two extruders, extruding blank of the multilayer composite packing belts through a multilayer composite extruding head, fixing with a three-roll tableting machine, using hot water as a medium to obtain sheet materials of the packing belts, treating in an electrothermal oven, cutting to obtain belt blanks, stretching to obtain belt materials, fixing by the oven, eliminating internal stresses, fixing in a cooling water box, and treating by a fixing winder, thereby finishing the production. The produced product is reduced in skewness degree and elongation rate, bright in appearance, and improved in product density, hardness, toughness and elasticity, and overcomes transverse cracking phenomena. The packing belts are mainly used in automatic packaging lines of tobacco industry.
Description
Technical field
The present invention relates to wrap up technical field, be specifically related to the production method of the strap that uses on the tobacco business mechanical packaging streamline.
Background technology
The lightweight strap that is widely used in product external packaging at present is a kind of plastic baling band, is to be raw material with the polypropylene, and single raw material or plurality of raw materials mixed melting are also extruded made-up belt, through the cooling after, directly add hot-stretch, the typing and get.
The production method of strap and complete set of equipments comprise single material plasticizing fusion, extrude base just, and cooling and shaping and one-off drawing get semi-finished product, and embossing adds thermal finalization, cooling and shaping, and rolling obtains final products.
A kind of polyester packing belt and processing technology thereof, step (1) polyester raw material drying, (2) raw materials melt are extruded the sheet typing, and (3) add hot-stretch more than twice, (4) embossing, (5) tempering thermal finalization, (6) cooling and shaping, (7) rolling.
Another kind of basic craft course for the manufacture of strap obtains the material base for the typing of (1) raw materials melt, (2) cold water cooling, (3) be heated to vitrification point, (4) one-off drawing, (5) succeeding stretch, (6) three stretchings, (7) calibrator heats, (8) cool off (9) four stretchings, (10) clot in the cooling device.
All there is certain defective in above prior art, show, if raw material is the compound more than two kinds, its physicochemical property is variant, its rheology difference, technological temperature is required difference, raw material is mixed back fusion meeting cause thickness and the width of the first base of strap inhomogeneous, will control product width and thickness deviation on technology is a more scabrous problem; The first base that melt extrudes without flatten handling, namely stretches after adding thermal finalization, easily causes width, the uneven thickness of product, and product packing, hardness, toughness, elasticity are relatively poor.
Existing strap product is handled through embossing, and the surface is rough and uneven in surface, and it is limited to slide at packing case edges and corners strap, is unsuitable for using in tobacco business mechanical packaging streamline packing.
Summary of the invention
The objective of the invention is to disclose a kind of production method of multi-layer combined strap, start with from structural change, improve the strap quality, be applicable to that various product external packagings use, be specially adapted to use in the tobacco business mechanical packaging streamline packing.
For solving above technical problem, technical scheme provided by the invention is:
A kind of production method of multi-layer combined strap may further comprise the steps:
(1) with two kinds of strap materials plastifying fusion in two extruders respectively, clamp-on in the multi-layer combined extruder head from different entrances simultaneously respectively afterwards, be assigned with from porch separately and enter a plurality of material road, the different material alternate allocation and is compiled lip from the not end in a plurality of material road and is extruded banded melt strap that MULTILAYER COMPOSITE has certain thickness and width base just in different material roads;
(2) the first base of traction strap enters tri-roller tabletmachine compressing tablet typing processing, makes medium with hot water, by the production line direction, the roller temperature of three rollers is followed successively by 84 ℃-72 ℃, and temperature reduces gradually, and the temperature difference is 5 ℃-8 ℃ between roller and the roller, pulling speed be 6-7 rice/minute, obtain the strap sheet material;
(3) the strap sheet material enters Electric heat oven by the traction of two roller hauling machines;
(4) cut by cutting knife after going out Electric heat oven, make rim charge and handle, obtain made-up belt, made-up belt in four roller stretching-machines, stretch band, enter the heat treatment oven typing, eliminate internal stress, in cooling water tank, finalize the design again;
(5) traction enters the typing up-coiler, obtains semi-finished product, and room temperature left standstill 24-72 hour, fully finished retraction, and typing is finished;
(6) rewinding machine after-combustion, the heat shrinkage film packing obtains multi-layer combined strap final products.
Preferably: the described strap material of step (1) is homopolymerization type polypropylene, consumption is weight 60%-80%, with the copoly type polypropylene, consumption is weight 20%-40%, 195-200 ℃ of multi-layer combined extruder head temperature, melt pressure 4MP, extrusion temperature 180-220 ℃, screw speed 80-100 rev/min, more preferably: homopolymerization type polypropylene is selected weight 70%, and the copoly type polypropylene is selected weight 30%.
Preferably: in the step (3), two roller hauling machine pulling speeds are 6-7 rice, and Electric heat oven is 200 ℃-220 ℃.
Preferably: in the step (4), the heat treatment oven temperature is 120 ℃-150 ℃, and the cooling and shaping water tank temperature is 4 ℃-10 ℃, pulling speed be 40-50 rice/minute.
Preferably: in the step (5), pulling speed be 40-50 rice/minute, room temperature was placed 24 hours.
Preferably: material accumulates seven layers of compound strap base just by seven material roads in multi-layer combined extruder head, wherein, first and third, be a kind of material in five, the seven material roads, the second, be another kind of material in four, the six material roads, the first, seven material roads are respectively the upper and lower top layer of strap, second and third, layer is arranged in four, five, six roads successively, is the copoly type polypropylene in first and third, five, the seven material roads wherein, in second, four, the six material roads for homopolymerization type polypropylene.
Multi-layer combined extruder head is prior art, for the production of the processing equipment of plastic plate, section bar, sheet material etc.Material road quantity in the described head adapts with the product number of plies.Feed(raw material)inlet quantity and raw material type quantity adapt on the head.
Compared with prior art, the present invention makes strap form multi-layer compound structure by improving the material melt extrusion processes, realizes different component materials performance complements; Increase rolling process, it is even effectively to control strap thickness, increases packing; Increase cutting knife cutting technology, by the specification typing; Optimize and stretch and shaping process.Its degree of skewness of product that the present invention produces, percentage elongation reduce, and the outward appearance light has overcome horizontal cracking phenomena, the product packing, and hardness, toughness, elasticity increase.
Technical scheme of the present invention is controlled the width of strap and thickness easily, and product size stability is significantly improved, and has solved on the technology unsolved technical barrier all the time.
Particularly, production method of the present invention obtains but is not limited to following beneficial effect:
1, material fusion in different extruders respectively, gather after extrude in the shunting and be composite bed, every kind of material independence stratification, every layer is with a kind of material, adapt to rheology requirement and the temperature process requirement of different material, overcome product thickness, the packing defective pockety that mixing of materials causes rheology and the inconsistent generation of temperature requirement, realize different component materials performance complements, the product thickness uniformity is easy to control, the combined type of selected different interior roads quantity is extruded head, can produce the compound strap of the different numbers of plies;
2, melt extrude and the first base of strap, adopt the tri-roller tabletmachine compressing tablet to handle in advance, control thickness increases packing, carries out drawing and setting again, effectively improves the quality of products.
3, increase cutting knife cutting technology, the strap neat in edge, specification has had technologic assurance, and optimize and save stretching process, one-off drawing, hot and cold, placement three road setting process, strap bounces back fully, and typing is stable.
4, no embossing, smooth surface is suitable for tobacco relevant industries mechanical packaging streamline and uses.
The multi-layer combined strap that method of the present invention is produced, through relevant quality inspection, product meets national Ministry of Light Industry strap target level of product quality.
Description of drawings:
Fig. 1 is the process flow diagram of the production method of the multi-layer combined strap of the present invention.
The specific embodiment
Now with accompanying drawing technical scheme of the present invention is described further in conjunction with the embodiments.
Examples of implementation 1
Referring to Fig. 1, represent that production method of the present invention is a kind of preferred embodiment technological process and technological requirement, this technological process is applicable to that material is homopolymerization type polypropylene and copolymerized type propene polymer.
(1) be weight 60%-80% with two kinds of material homopolymerization type polypropylene consumptions, copoly type polypropylene consumption is weight 20%-40%, fusion plastification in two extruders respectively, clamp-on in the multi-layer combined extruder head from different entrances simultaneously respectively afterwards, be assigned with from porch separately and enter a plurality of material road, wherein, first, three, five, be the copoly type polypropylene in the seven material roads, second, four, be homopolymerization type polypropylene in the six material roads, and compile lip from not holding of seven material roads and extrude seven layers of first base of banded melt strap that is compounded with certain thickness and width, 195-200 ℃ of multi-layer combined extruder head temperature, melt pressure 4MP, extrusion temperature 180-220 ℃, screw speed 80-100 rev/min.
(2) the traction strap just base enter the typing of tri-roller tabletmachine compressing tablet and handle, in roller, make medium with hot water, press the streamline direction, three roll temperatures are respectively 84 ℃, 77 ℃ and 72 ℃, pulling speed be 6-7 rice/minute, obtain the thick 2-2.5mm strap of wide 200mm sheet material;
(3) the strap sheet material enters 200 ℃ of-220 ℃ of Electric heat ovens by the traction of two roller hauling machines and is heated to vitrification point, and pulling speed is 6-7 rice;
(4) going out Electric heat oven cuts by cutting knife, obtain the made-up belt of width 25mm, rim charge is recycling after crusher in crushing is handled, by four roller stretching-machines with 40-50 rice/minute speed stretch, obtaining width is 10-10.5mm, and thickness is the band of 0.6-0.7mm, passes through 120-150 ℃ of heat treatment again, eliminate internal stress, again through 4 ℃ of-10 ℃ of water quench typings;
(5) traction enter the typing up-coiler, be wound into the big volume semi-finished product of φ 500mm, width 150mm, room temperature left standstill 24-72 hour, fully finished retraction, typing is finished, pulling speed be 40-50 rice/minute.
(6) with the rewinding machine after-combustion on the special-purpose refill of φ 200mm, width 190mm, with heat shrink films through the shrink-packaging finished product.
Present embodiment is more suitable for selecting weight 70% in homopolymerization type polypropylene, and the copoly type polypropylene is selected weight 30%.
The copoly type polypropylene is the top layer of multi-layer combined strap, and is more durable, and sense organ is fine quality.
It below only is preferred embodiment of the present invention; should not be considered as limitation of the present invention; the increase and decrease of the increase of extruder quantity and/or extruder head internal channel; all may realize multi-layer compound package band composite construction of the present invention; extruder quantity≤combined type of the present invention is extruded head internal channel quantity, and these improvement all should be considered as open and protection domain of the present invention.
Claims (8)
1. the production method of a multi-layer combined strap, its spy is, may further comprise the steps:
(1) with two kinds of strap materials plastifying fusion in two extruders respectively, clamp-on in the multi-layer combined extruder head from different entrances simultaneously respectively afterwards, be assigned with from porch separately and enter a plurality of material road, the different material alternate allocation and is compiled lip from the not end in a plurality of material road and is extruded banded melt strap that MULTILAYER COMPOSITE has certain thickness and width base just in different material roads;
(2) the first base of traction strap enters tri-roller tabletmachine typing processing, makes medium with hot water, by the production line direction, the roller temperature of three rollers is followed successively by 84 ℃-72 ℃, and temperature reduces gradually, and the temperature difference is 5 ℃-8 ℃ between roller and the roller, pulling speed be 6-7 rice/minute, obtain the strap sheet material;
(3) the strap sheet material enters Electric heat oven by the traction of two roller hauling machines;
(4) cut by cutting knife after going out Electric heat oven, make rim charge and handle, obtain made-up belt, made-up belt in four roller stretching-machines, stretch band, enter the heat treatment oven typing, eliminate internal stress, in cooling water tank, finalize the design again;
(5) traction enters the typing up-coiler, obtains semi-finished product, and room temperature left standstill 24-72 hour, fully finished retraction, and typing is finished;
(6) rewinding machine after-combustion, the heat shrinkage film packing obtains multi-layer combined strap final products.
2. the production method of multi-layer combined strap according to claim 1, it is characterized in that, the described strap material of step (1) is homopolymerization type polypropylene, consumption is weight 60%-80%, and copoly type polypropylene, consumption are weight 20%-40%, 195-200 ℃ of multi-layer combined extruder head temperature, melt pressure 4MP, extrusion temperature 180-220 ℃, screw speed 80-100 rev/min.
3. the production method of multi-layer combined strap according to claim 1 is characterized in that, in the step (3), two roller hauling machine pulling speeds are 6-7 rice, and Electric heat oven is 200 ℃-220 ℃.
4. the production method of multi-layer combined strap according to claim 1 is characterized in that, in the step (4), the heat treatment oven temperature is 120 ℃-150 ℃, and the cooling and shaping coolant-temperature gage is 4 ℃-10 ℃, pulling speed be 40-50 rice/minute.
5. the production method of multi-layer combined strap according to claim 1 is characterized in that, in the step (5), pulling speed be 40-50 rice/minute, room temperature was placed 24 hours.
6. according to the production method of the multi-layer combined strap described in the claim 2, it is characterized in that homopolymerization type polypropylene is selected weight 70%, the copoly type polypropylene is selected weight 30%.
7. the production method of multi-layer combined strap according to claim 1, it is characterized in that, material compiles by seven material roads in multi-layer combined extruder head extrudes seven layers of compound strap base just, wherein, first and third, be a kind of material in five, the seven material roads, the second, be another kind of material in four, the six material roads, first, seven material roads are respectively the upper and lower top layer of strap, other second and third, four, five, six row layers successively.
8. according to the production method of each described multi-layer combined strap among the claim 2-6, it is characterized in that, material accumulates seven layers of compound strap base just by seven material roads in multi-layer combined extruder head, be the copoly type polypropylene in first and third, five, the seven material roads wherein, the second, be homopolymerization type polypropylene in four, the six material roads, the first, seven material roads are respectively the upper and lower top layer of strap, successively ordering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102068057A CN103341980A (en) | 2013-05-17 | 2013-05-17 | Production method of multilayer composite packing belts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102068057A CN103341980A (en) | 2013-05-17 | 2013-05-17 | Production method of multilayer composite packing belts |
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| CN103341980A true CN103341980A (en) | 2013-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013102068057A Pending CN103341980A (en) | 2013-05-17 | 2013-05-17 | Production method of multilayer composite packing belts |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103707512A (en) * | 2013-12-18 | 2014-04-09 | 杭州富阳华晨塑业有限公司 | Double-channel polyethylene terephthalate (PET) strap production line |
| CN109834954A (en) * | 2019-03-23 | 2019-06-04 | 东莞市欧之可环保包装科技有限公司 | A kind of preparation method of unmanned strap |
-
2013
- 2013-05-17 CN CN2013102068057A patent/CN103341980A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103707512A (en) * | 2013-12-18 | 2014-04-09 | 杭州富阳华晨塑业有限公司 | Double-channel polyethylene terephthalate (PET) strap production line |
| CN109834954A (en) * | 2019-03-23 | 2019-06-04 | 东莞市欧之可环保包装科技有限公司 | A kind of preparation method of unmanned strap |
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Application publication date: 20131009 |