CN109849433A - A kind of packaging bag production method - Google Patents
A kind of packaging bag production method Download PDFInfo
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- CN109849433A CN109849433A CN201811635178.8A CN201811635178A CN109849433A CN 109849433 A CN109849433 A CN 109849433A CN 201811635178 A CN201811635178 A CN 201811635178A CN 109849433 A CN109849433 A CN 109849433A
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- packaging film
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- packaging bag
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention discloses a kind of packaging bag production methods, including production intaglio plate, modulation ink, installation equipment, printing, energy saving baking processing, printed patterns detection, compound working procedure, ten dry solidification, cutting and bag making steps, wherein energy saving baking processing uses energy saving baking heat pump group, printed patterns detection is radiated at by using stroboscopic lamp obtains synchronizing static pattern on packaging film, compound working procedure uses solvent-free complex method, using special glue.Printing equipment operational process of the present invention is steady, and speed is consistent, and printing is uniform, printing effect is good, using energy saving baking heat pump group, the heat of loss is recycled, it is energy saving, using solvent-free complex method, the pollution environment that volatilizees because of solvent is avoided, changes condition of cure, so that packaging bag has effect resistant to high temperature, the performance for promoting packaging bag, expands the scope of application of packaging bag.
Description
Technical field
The present invention relates to packaging material fields, and in particular to a kind of packaging bag production method.
Background technique
Packaging bag refers to the sack for packing various articles, makes cargo convenient transportation in the production process of circulation, is easy
Storage.It is widely used in daily life and industrial production.Real figure shows, the polybag after having 80% use, finally and generally
Rubbish is equally transported to the processing of rubbish heap field area, and only 7 percent plastics are recovered recycling.
Advocating now can although having much using ingredients such as polylactic acid using the material preparation packaging bag that can be degraded
The effect of degradation, still, higher cost.Meanwhile now in packaging fields such as food, it is desirable that material has good antibacterial effect
Fruit, is often added the substance with bactericidal effect such as silver ion, and when use has heavy metal precipitation, in current food packaging
When, many prepared food use the manner of packing of vacuum, often use plastic packaging bag now, need to heat it when edible, wrap
The bad health that will affect user of the heat-resisting quantity of pack.
Summary of the invention
Present invention aim to address above-mentioned deficiencies, provide a kind of packaging bag production method.
In order to achieve the above object, the technical solution of the invention is as follows: a kind of packaging bag production method, including walks as follows
It is rapid:
Step 1, make intaglio plate: the pattern of same color is placed on the same intaglio plate by the pattern standards version printed as needed
On；
Step 2, modulate ink: the pattern standards version printed as needed modulates corresponding color for the tinctorial pattern in pattern
Ink；
Step 3, install equipment: the intaglio plate that step 1 is produced is mounted on printing equipment, and in the ink cartridge of printing equipment
The ink of intaglio plate corresponding color is placed, while packaging film to be printed is placed on initial position；
Step 4, print: blowing traction mechanism starts to draw packaging film with pre-set velocity, real by control system display packing film
Shi Zhangli adjusts the feeding speed of blowing traction mechanism according to real-time strain, camera monitoring device is equipped among printing equipment, even
Remote monitoring system is connect, long-range monitoring printing equipment is realized, guarantees the normal operation of equipment；
Step 5, energy saving baking is handled: being provided with energy saving baking heat pump group, the volatilization generated in printing process above printing equipment
Property gas and discharge heat through energy saving baking heat pump group absorption after, heat therein is recycled, then by gas after cooling
Discharge, energy saving baking heat pump group accelerate the volatilization of the packaging membrane solvent after printing, to accelerate the packaging film solidification after printing；
Step 6, printed patterns detect: opening stroboscopic lamp, stroboscopic lamp is radiated on packaging film, adjusts stroboscopic lamp by control device
Flash rate, packaging film reach slewing rollers by stroboscopic lamp position from transfer roller, and diverted roller passes through stroboscopic lamp to winding
The packaging film being radiated between transfer roller and slewing rollers can observe static by synchronizing of irradiating of stroboscopic lamp on packaging film
Pattern, contrast patterns standard edition carry out detection pattern it is whether identical, difference, pass hull closure are adjusted if it exists, until frequency
What flashing light irradiated synchronizes the packaging film that static pattern is identical as pattern standards version, after winding printing；
Step 7, compound working procedure: complex method use solvent-free complex method, equipment complex side be equipped with glue preparation machine, composite membrane with
Packaging film is separately positioned on the two sides of equipment complex, and the side of the non-printed patterns of packaging film is crossed glue, transmitted by guide rail, and pressing is multiple
Film and packaging film are closed, is wound after pressing；
Step 8, dry solidification: packaging film of the step 7 after compound is wound, is transferred among curing room, accelerating step 7 uses glue
The solidification of water, curing room use energy-saving heat cycle heat pump, are divided into commonly and high temperature resistant products according to the purposes of packaging film；
Step 9, cut: the packaging film after step 8 is solidified carries out slitting operation, is determined and is divided according to the packaging size on packaging film
Size is cut, and the packaging after cutting is wound；
Step 10, bag making: the packaging film that step 9 is cut and wound is placed in bag-making equipment, opens bag-making equipment, packaging film
It is made into the packaging bag not closed for one end by bag-making equipment, the packaging bag produced is packaged.
Further, the depth of gravure printing slot is preferably 10 μm -45 μm in the step 1.
Further, in the step 6 stroboscopic lamp irradiate synchronize static pattern between transfer roller and slewing rollers
Packaging film on.
Further, glue used in the step 7 includes following parts by weight of component: 20-25 parts of polyoxypropyleneglycol,
15-20 parts of polypropylene oxide triol, 12-15 parts of polyester polyol, MDI-50 are 35-38 parts, liquefied mdi is 12-15 parts, castor-oil plant
50-55 parts oily, 8-12 parts of isocyanates, 40-45 parts of benzoic anhydride polyester polyol, 0.3-0.5 parts of coupling agent, 2-3 parts of filler, chain extension
0.1-0.15 parts of agent.
Further, the coupling agent is silane coupling agent, and filler is calcium carbonate, silica flour, titanium dioxide, silicon powder, glass
One or more of microballon or aluminium oxide.
Further, the chain extender is 1,2- ethylene glycol.
Further, the polyester polyol is one of adipic acid, M-phthalic acid, terephthalic acid (TPA), phthalic anhydride or more
Kind, with ethylene glycol, diethylene glycol, triethylene glycol, trimethylolpropane, 1,6- hexylene glycol, neopentyl glycol, 2- methyl-1,3- third
One of glycol, 1,4-butanediol are a variety of, the hydroxy-end capped oligomer synthesized by macromolecule polycondensation reaction, described poly-
The molecular weight of ester polyol is 600-1000.
Further, in the step 8 ordinary packing film condition of cure are as follows: 32-37 DEG C of temperature, time 24-36h；It is resistance to
The condition of cure of high temperature packaging film are as follows: 38-42 DEG C of temperature, time 60-72h.
Further, humidity induction device is equipped in step 8 curing room, outside is equipped with humidifier, passes through humidifier tune
The humidity of solidating chamber interior.
The present invention provides a kind of packaging bag production method, have it is following the utility model has the advantages that
1, by using intaglio printing mode, printing equipment operational process is steady, and speed is consistent, and uniformly, printing is imitated for printing
Fruit is good；By targetedly modulating ink, so that the pattern of printing is identical as standard edition, printing effect is improved；By to printing
The real-time detection of substrate tension adjusts print speed printing speed, guarantees the stability of printing process；
2, by using energy saving baking heat pump group, the heat of the gas and loss that volatilize in printing process is recycled,
After recycling heat, exhaust-gas treatment is carried out to gas, reaches the energy-saving effect of superelevation and ensure that the safety of discharge gas.
3, composite membrane can improve the characteristic of single film, can improve the protective effect to content, include moisture resistance, anti-
Oiliness, barrier property, light-proofness and air-tightness；By using special glue, so that packaging bag curing rate is fast, it is molten without adding
Agent, no pollution to the environment, and glue bonding adhesive force is strong, it is compound after printing to be not easy to be layered, blister.
4, by adjusting condition of cure, so that packaging bag has effect resistant to high temperature, the performance of packaging bag is promoted, expands packet
The scope of application of pack.
Detailed description of the invention
Fig. 1 is schematic process flow diagram of the invention.
Fig. 2 is the working principle schematic block diagram of energy saving baking heat pump group of the present invention.
Fig. 3 is the schematic block diagram of printed patterns of the present invention detection.
Specific embodiment
Below in conjunction with attached drawing and embodiment of the invention, technical solution in the embodiment of the present invention carry out it is clear,
It is fully described by, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.
The embodiment in the present invention is given, it is obtained by those of ordinary skill in the art without making creative efforts all
Other embodiments belong to the scope of protection of the invention.
Embodiment 1:
As shown in Figure 1, Figure 2 and Figure 3, a kind of packaging bag production method, includes the following steps:
Step 1, make intaglio plate: the pattern of same color is placed on the same intaglio plate by the pattern standards version printed as needed
On, the depth of gravure printing slot is preferably 10 μm；
Step 2, modulate ink: the pattern standards version printed as needed modulates corresponding color for the tinctorial pattern in pattern
Ink；
Step 3, install equipment: the intaglio plate that step 1 is produced is mounted on printing equipment, and in the ink cartridge of printing equipment
The ink of intaglio plate corresponding color is placed, while packaging film to be printed is placed on initial position；
Step 4, print: blowing traction mechanism starts to draw packaging film with pre-set velocity, real by control system display packing film
Shi Zhangli adjusts the feeding speed of blowing traction mechanism according to real-time strain, camera monitoring device is equipped among printing equipment, even
Remote monitoring system is connect, long-range monitoring printing equipment is realized, guarantees the normal operation of equipment；
Step 5, energy saving baking is handled: being provided with energy saving baking heat pump group, the volatilization generated in printing process above printing equipment
Property gas and discharge heat through energy saving baking heat pump group absorption after, heat therein is recycled, then by gas after cooling
Discharge, energy saving baking heat pump group accelerate the volatilization of the packaging membrane solvent after printing, to accelerate the packaging film solidification after printing；
Step 6, printed patterns detect: opening stroboscopic lamp, stroboscopic lamp is radiated on packaging film, adjusts stroboscopic lamp by control device
Flash rate, packaging film reach slewing rollers by stroboscopic lamp position from transfer roller, and diverted roller passes through stroboscopic lamp to winding
The packaging film being radiated between transfer roller and slewing rollers can observe static by synchronizing of irradiating of stroboscopic lamp on packaging film
Pattern, what stroboscopic lamp irradiated synchronizes static pattern on the packaging film between transfer roller and slewing rollers, contrast patterns
Standard edition carries out whether detection pattern is identical, and difference, pass hull closure are adjusted if it exists, until the synchronization that stroboscopic lamp irradiates
Static pattern is identical as pattern standards version, the packaging film after winding printing；
Step 7, compound working procedure: complex method use solvent-free complex method, equipment complex side be equipped with glue preparation machine, composite membrane with
Packaging film is separately positioned on the two sides of equipment complex, and the side of the non-printed patterns of packaging film is crossed glue, transmitted by guide rail, and pressing is multiple
Film and packaging film are closed, is wound after pressing；
Step 8, dry solidification: packaging film of the step 7 after compound is wound, is transferred among curing room, accelerating step 7 uses glue
The solidification of water, curing room use energy-saving heat cycle heat pump, are divided into commonly and high temperature resistant products according to the purposes of packaging film, normal packet
Fill the condition of cure of film are as follows: 32 DEG C of temperature, time 36h；The condition of cure of high temperature resistant packaging film are as follows: 38 DEG C of temperature, the time is
72h, curing room is interior to be equipped with humidity induction device, and outside is equipped with humidifier, passes through the humidity inside humidifier adjustment curing room；
Step 9, cut: the packaging film after step 8 is solidified carries out slitting operation, is determined and is divided according to the packaging size on packaging film
Size is cut, and the packaging after cutting is wound；
Step 10, bag making: the packaging film that step 9 is cut and wound is placed in bag-making equipment, opens bag-making equipment, packaging film
It is made into the packaging bag not closed for one end by bag-making equipment, the packaging bag produced is packaged.
Further, glue used in the step 7 includes following parts by weight of component: 20 parts of polyoxypropyleneglycol gathers
15 parts of propylene oxide triol, 12 parts of polyester polyol, MDI-50 are 35 parts, liquefied mdi is 12 parts, 50 parts of castor oil, isocyanic acid
8 parts of ester, 40 parts of benzoic anhydride polyester polyol, 0.3 part of silane coupling agent, calcium carbonate, silica flour and totally 2 parts of titanium dioxide, 1,2- second two
0.1 part of alcohol.
Further, the polyester polyol is adipic acid, M-phthalic acid, terephthalic acid (TPA), ethylene glycol, diethylene glycol
And triethylene glycol, the hydroxy-end capped oligomer synthesized by macromolecule polycondensation reaction, the molecular weight of the polyester polyol are
600-1000。
Embodiment 2:
As shown in Figure 1, Figure 2 and Figure 3, a kind of packaging bag production method, includes the following steps:
Step 1, make intaglio plate: the pattern of same color is placed on the same intaglio plate by the pattern standards version printed as needed
On, the depth of gravure printing slot is preferably 45 μm；
Step 2, modulate ink: the pattern standards version printed as needed modulates corresponding color for the tinctorial pattern in pattern
Ink；
Step 3, install equipment: the intaglio plate that step 1 is produced is mounted on printing equipment, and in the ink cartridge of printing equipment
The ink of intaglio plate corresponding color is placed, while packaging film to be printed is placed on initial position；
Step 4, print: blowing traction mechanism starts to draw packaging film with pre-set velocity, real by control system display packing film
Shi Zhangli adjusts the feeding speed of blowing traction mechanism according to real-time strain, camera monitoring device is equipped among printing equipment, even
Remote monitoring system is connect, long-range monitoring printing equipment is realized, guarantees the normal operation of equipment；
Step 5, energy saving baking is handled: being provided with energy saving baking heat pump group, the volatilization generated in printing process above printing equipment
Property gas and discharge heat through energy saving baking heat pump group absorption after, heat therein is recycled, then by gas after cooling
Discharge, energy saving baking heat pump group accelerate the volatilization of the packaging membrane solvent after printing, to accelerate the packaging film solidification after printing；
Step 6, printed patterns detect: opening stroboscopic lamp, stroboscopic lamp is radiated on packaging film, adjusts stroboscopic lamp by control device
Flash rate, packaging film reach slewing rollers by stroboscopic lamp position from transfer roller, and diverted roller passes through stroboscopic lamp to winding
The packaging film being radiated between transfer roller and slewing rollers can observe static by synchronizing of irradiating of stroboscopic lamp on packaging film
Pattern, what stroboscopic lamp irradiated synchronizes static pattern on the packaging film between transfer roller and slewing rollers, contrast patterns
Standard edition carries out whether detection pattern is identical, and difference, pass hull closure are adjusted if it exists, until the synchronization that stroboscopic lamp irradiates
Static pattern is identical as pattern standards version, the packaging film after winding printing；
Step 7, compound working procedure: complex method use solvent-free complex method, equipment complex side be equipped with glue preparation machine, composite membrane with
Packaging film is separately positioned on the two sides of equipment complex, and the side of the non-printed patterns of packaging film is crossed glue, transmitted by guide rail, and pressing is multiple
Film and packaging film are closed, is wound after pressing；
Step 8, dry solidification: packaging film of the step 7 after compound is wound, is transferred among curing room, accelerating step 7 uses glue
The solidification of water, curing room use energy-saving heat cycle heat pump, are divided into commonly and high temperature resistant products according to the purposes of packaging film, normal packet
Fill the condition of cure of film are as follows: 37 DEG C of temperature, the time is for 24 hours；The condition of cure of high temperature resistant packaging film are as follows: 42 DEG C of temperature, the time is
60h, curing room is interior to be equipped with humidity induction device, and outside is equipped with humidifier, passes through the humidity inside humidifier adjustment curing room；
Step 9, cut: the packaging film after step 8 is solidified carries out slitting operation, is determined and is divided according to the packaging size on packaging film
Size is cut, and the packaging after cutting is wound；
Step 10, bag making: the packaging film that step 9 is cut and wound is placed in bag-making equipment, opens bag-making equipment, packaging film
It is made into the packaging bag not closed for one end by bag-making equipment, the packaging bag produced is packaged.
Further, glue used in the step 7 includes following parts by weight of component: 25 parts of polyoxypropyleneglycol gathers
20 parts of propylene oxide triol, 15 parts of polyester polyol, MDI-50 are 38 parts, liquefied mdi is 15 parts, 55 parts of castor oil, isocyanic acid
12 parts of ester, 45 parts of benzoic anhydride polyester polyol, 0.5 part of silane coupling agent, silicon powder, glass microballoon and totally 3 parts of aluminium oxide, 1,2- second
0.15 part of glycol.
Further, the polyester polyol is phthalic anhydride, trimethylolpropane, 1,6- hexylene glycol, neopentyl glycol, 2- methyl-
1,3-PD and 1,4-butanediol, the hydroxy-end capped oligomer synthesized by macromolecule polycondensation reaction, the polyester polyols
The molecular weight of alcohol is 600-1000.
What has been described above is only an embodiment of the present invention, and well known characteristic common sense does not describe excessively herein in scheme.It answers
When pointing out, for those skilled in the art, under the premise of not departing from the present invention, several improvement are also made, these
Protection scope of the present invention should be shown in.
Claims (9)
1. a kind of packaging bag production method, characterized by the following steps:
Step 1, make intaglio plate: the pattern of same color is placed on the same intaglio plate by the pattern standards version printed as needed
On；
Step 2, modulate ink: the pattern standards version printed as needed modulates corresponding color for the tinctorial pattern in pattern
Ink；
Step 3, install equipment: the intaglio plate that step 1 is produced is mounted on printing equipment, and in the ink cartridge of printing equipment
The ink of intaglio plate corresponding color is placed, while packaging film to be printed is placed on initial position；
Step 4, print: blowing traction mechanism starts to draw packaging film with pre-set velocity, real by control system display packing film
Shi Zhangli adjusts the feeding speed of blowing traction mechanism according to real-time strain, camera monitoring device is equipped among printing equipment, even
Remote monitoring system is connect, long-range monitoring printing equipment is realized, guarantees the normal operation of equipment；
Step 5, energy saving baking is handled: being provided with energy saving baking heat pump group, the volatilization generated in printing process above printing equipment
Property gas and discharge heat through energy saving baking heat pump group absorption after, heat therein is recycled, then by gas after cooling
Discharge, energy saving baking heat pump group accelerate the volatilization of the packaging membrane solvent after printing, to accelerate the packaging film solidification after printing；
Step 6, printed patterns detect: opening stroboscopic lamp, stroboscopic lamp is radiated on packaging film, adjusts stroboscopic lamp by control device
Flash rate, packaging film reach slewing rollers by stroboscopic lamp position from transfer roller, and diverted roller passes through stroboscopic lamp to winding
The packaging film being radiated between transfer roller and slewing rollers can observe static by synchronizing of irradiating of stroboscopic lamp on packaging film
Pattern, contrast patterns standard edition carry out detection pattern it is whether identical, difference, pass hull closure are adjusted if it exists, until frequency
What flashing light irradiated synchronizes the packaging film that static pattern is identical as pattern standards version, after winding printing；
Step 7, compound working procedure: complex method use solvent-free complex method, equipment complex side be equipped with glue preparation machine, composite membrane with
Packaging film is separately positioned on the two sides of equipment complex, and the side of the non-printed patterns of packaging film is crossed glue, transmitted by guide rail, and pressing is multiple
Film and packaging film are closed, is wound after pressing；
Step 8, dry solidification: packaging film of the step 7 after compound is wound, is transferred among curing room, accelerating step 7 uses glue
The solidification of water, curing room use energy-saving heat cycle heat pump, are divided into commonly and high temperature resistant products according to the purposes of packaging film；
Step 9, cut: the packaging film after step 8 is solidified carries out slitting operation, is determined and is divided according to the packaging size on packaging film
Size is cut, and the packaging after cutting is wound；
Step 10, bag making: the packaging film that step 9 is cut and wound is placed in bag-making equipment, opens bag-making equipment, packaging film
It is made into the packaging bag not closed for one end by bag-making equipment, the packaging bag produced is packaged.
2. a kind of packaging bag production method as described in claim 1, it is characterised in that: the depth of gravure printing slot in the step 1
Preferably 3 μm -15 μm of degree.
3. a kind of packaging bag production method as described in claim 1, it is characterised in that: stroboscopic lamp irradiates in the step 6
Synchronize static pattern on the packaging film between transfer roller and slewing rollers.
4. a kind of packaging bag production method as described in claim 1, it is characterised in that: glue packet used in the step 7
Include following parts by weight of component: 20-25 parts of polyoxypropyleneglycol, 15-20 parts of polypropylene oxide triol, polyester polyol 12-15
Part, MDI-50 are 35-38 parts, liquefied mdi is 12-15 parts, 50-55 parts of castor oil, 8-12 parts of isocyanates, phthalic anhydride polyester polyols
40-45 parts of alcohol, 0.3-0.5 parts of coupling agent, 2-3 parts of filler, 0.1-0.15 parts of chain extender.
5. a kind of packaging bag production method as claimed in claim 4, it is characterised in that: the coupling agent is silane coupling agent,
Filler is one or more of calcium carbonate, silica flour, titanium dioxide, silicon powder, glass microballoon or aluminium oxide.
6. a kind of packaging bag production method as claimed in claim 4, it is characterised in that: the chain extender is 1,2- ethylene glycol.
7. a kind of packaging bag production method as claimed in claim 4, it is characterised in that: the polyester polyol be adipic acid,
One of M-phthalic acid, terephthalic acid (TPA), phthalic anhydride are a variety of, with ethylene glycol, diethylene glycol, triethylene glycol, trihydroxy methyl
Propane, 1,6- hexylene glycol, neopentyl glycol, 2- methyl-1, one of 3-propanediol, 1,4-butanediol or a variety of pass through high score
The hydroxy-end capped oligomer of sub- polycondensation reaction synthesis, the molecular weight of the polyester polyol are 600-1000.
8. a kind of packaging bag production method as described in claim 1, it is characterised in that: ordinary packing film in the step 8
Condition of cure are as follows: 32-37 DEG C of temperature, time 24-36h；The condition of cure of high temperature resistant packaging film are as follows: 38-42 DEG C of temperature, the time
For 60-72h.
9. a kind of packaging bag production method as described in claim 1, it is characterised in that: be equipped in step 8 curing room wet
Sensing device is spent, outside is equipped with humidifier, adjusts the humidity inside curing room by humidifier.
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| CN111824494A (en) * | 2020-06-18 | 2020-10-27 | 苏州微敏检测技术服务有限公司 | Prevent adsorbing medicine packing inert gas protection production system |
| CN112409978A (en) * | 2020-09-10 | 2021-02-26 | 浙江采美新材料股份有限公司 | Solvent-free composite process for printing food packaging bags |
| CN112519439A (en) * | 2020-11-30 | 2021-03-19 | 合肥杏花印务股份有限公司 | Teaching material printing green process |
| WO2021056661A1 (en) * | 2019-09-25 | 2021-04-01 | 新兴印刷有限公司 | Paper film bag manufacturing process |
| CN112721324A (en) * | 2020-12-25 | 2021-04-30 | 王晓春 | Preparation method of degradable plastic packaging bag |
| CN113199816A (en) * | 2021-04-19 | 2021-08-03 | 青岛海德包装有限公司 | Manufacturing process of single-material printing bag |
| CN114103420A (en) * | 2022-01-27 | 2022-03-01 | 山东蓝海印刷科技有限公司 | Intelligent printing device with safety protection function |
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