CN109304854B - Production process of vertical polypropylene transfusion soft bag - Google Patents
Production process of vertical polypropylene transfusion soft bag Download PDFInfo
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- CN109304854B CN109304854B CN201811474274.9A CN201811474274A CN109304854B CN 109304854 B CN109304854 B CN 109304854B CN 201811474274 A CN201811474274 A CN 201811474274A CN 109304854 B CN109304854 B CN 109304854B
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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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/06—Injection blow-moulding
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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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/78—Measuring, controlling or regulating
- B29C49/783—Measuring, controlling or regulating blowing pressure
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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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C2049/023—Combined blow-moulding and manufacture of the preform or the parison using inherent heat of the preform, i.e. 1 step blow moulding
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Abstract
The invention belongs to the technical field of medical infusion bags, and particularly relates to a production process of a vertical polypropylene infusion soft bag, which comprises the following preparation steps: 1) installing a bag blank mold on an injection molding machine, putting the bag blank mold into a charging barrel of the injection molding machine, starting the charging barrel to heat and heat, injecting the molten plastic into the mold, maintaining the pressure in three sections, cooling to obtain a solid bag blank, and demolding to obtain the bag blank; 2) and putting the bag blank into a vacuum cavity, putting the bag blank into a blow molding machine, heating, introducing compressed air for blow molding, longitudinally stretching and transversely blow molding through a stretching rod in a blow molding mold, and cooling to obtain the vertical polypropylene transfusion soft bag. The production process of the vertical polypropylene infusion soft bag can improve the yield of the vertical polypropylene infusion soft bag, reduce the rejection rate, improve the light transmittance of the vertical polypropylene infusion soft bag and facilitate the direct observation of the quality of liquid medicine.
Description
Technical Field
The invention belongs to the technical field of medical infusion bags, and particularly relates to a production process of a vertical polypropylene infusion soft bag.
Background
Infusion products develop rapidly in nearly more than ten years in China, and are one of the main preparations in the current pharmaceutical industry. A batch of new infusion varieties for treatment, such as quinolones, amino acids for children, ribavirin, azithromycin, nimodipine, isosorbide mononitrate, puerarin of traditional Chinese medicine infusion varieties, salvia miltiorrhiza and the like, are developed successively to obtain production approval documents, and most of the documents are industrialized and put on the market; the novel infusion package is continuously developed, and the infusion output of the plastic package currently accounts for about 5 percent of the total infusion output by about 1.5 hundred million bottles (bags); the scale structure is continuously optimized, at present, 18 enterprises with annual output more than 3000 million bottles exist, 2 enterprises with more than 1 hundred million bottles exist, and the production concentration of the first 50 enterprises reaches 46%; the production conditions are greatly improved, 246 infusion production enterprises in 393 nationwide are modified to obtain GMP certification, and the product quality is obviously improved.
The structural upgrade of the infusion product is mainly shown in two aspects: the first is that: upgrading of packaging materials: upgrading the packaging material to soft plastic: in recent years, in large infusion dosage, the glass bottle infusion ratio tends to slide down year by year, and the plastic bottle and soft bag infusion generally rise faster; the future transfusion products will continue to be upgraded from glass bottles to plastic bottles and from plastic bottles to soft bags, and secondly: upgrading product types: the product types are upgraded to diversification. The difference between the variety of infusion solutions and the clinical requirement of China and the developed western countries is large. Although a batch of new infusion varieties are developed in China in recent years, the variety structures are also optimized, therapeutic infusion mainly comprises antibiotics, nutritional infusion mainly comprises glucose, amino acid and the like, and the variety series needs to be further enriched.
At present, the packaging materials in the infusion market of China mainly comprise 4 types of glass bottles, plastic bottles, non-PVC soft bags and vertical soft bags. Wherein, the non-PVC soft bag has larger occupation ratio and higher growth speed; the soft bag infusion has the defects of material quality and high manufacturing cost, and the sales volume of the soft bag infusion is reduced year by year as a product in the transition period. The new vertical polypropylene transfusion soft bag has the characteristics of safety, practicability, economy and environmental protection. The biggest difference between the upright polypropylene soft infusion bag product and other infusion products in packaging forms is that an air passage is not required to be opened by an exhaust needle, so that secondary pollution caused by contact with air in the infusion process is completely avoided, and the safety of clinical treatment and the health of patients are ensured. Meanwhile, the product overcomes the defect of high manufacturing cost of non-PVC soft bag infusion products, and has strong competitive power in China. However, the quality and yield of the vertical polypropylene infusion soft bag need to be further improved. Therefore, in order to improve the quality and yield of the vertical polypropylene soft infusion bag and simultaneously improve the labor productivity, the optimization of the production process of the vertical polypropylene soft infusion bag is very necessary.
Disclosure of Invention
The invention aims to solve the technical problem of providing a production process of a vertical polypropylene infusion soft bag, and improving the quality and the yield of the vertical polypropylene infusion soft bag.
In order to achieve the purpose, the invention adopts the following technical scheme:
the production process of the vertical polypropylene transfusion soft bag comprises the following preparation steps:
1) installing a bag blank mold on an injection molding machine, putting a medical-grade polypropylene raw material into a charging barrel of the injection molding machine, starting the charging barrel to heat, heating to 180-240 ℃, converting the polypropylene raw material from a solid state to a molten state, injecting the molten plastic into the mold, and maintaining the pressure in three sections: the first stage pressure is 50-65kPa, the pressure maintaining time is 0.5-1 second, the second stage pressure is 30-45kPa, the pressure maintaining time is 0.5-1 second, the third stage pressure is 55-60kPa, the pressure maintaining time is 1-2 seconds, the material becomes a solid bag blank after cooling, and the bag blank is obtained after demoulding;
2) putting the bag blank into a vacuum cavity with the vacuum degree of 60-80kPa for 10-20s, then putting the bag blank into a blow molding machine, heating to 120-125 ℃, introducing compressed air for blow molding, longitudinally stretching and transversely blow molding through a stretching rod in a blow molding die, and cooling to obtain the vertical polypropylene transfusion soft bag.
Preferably, in step 1), the pressure maintaining is performed in three stages: the first stage pressure was 60kPa, the dwell time was 0.5 seconds, the second stage pressure was 40kPa, the dwell time was 1 second, the third stage pressure was 58kPa, and the dwell time was 1.5 seconds.
Preferably, in the step 1) of the invention, the temperature of the cooling water is 35-40 ℃.
Preferably, in step 2) of the present invention, the bag blank is placed in a vacuum chamber with a vacuum degree of 70kPa for 15 s. Before blow molding, the bag blank is placed into the vacuum cavity, so that the heating temperature in the blow molding machine can be reduced, the heating time is shortened, and meanwhile, the heating energy is also reduced.
Preferably, in step 2) of the present invention, heating is performed to 123 ℃. After vacuum cavity treatment, the product yield is reduced and the rejection rate is increased due to overhigh or overlow heating temperature in the blow molding machine, and meanwhile, the quality of the soft infusion bag is reduced and the light transmittance is reduced.
Preferably, in the step 2) of the present invention, the cooling is performed by using circulating cooling water with the temperature of 25-30 ℃ and the pressure of 0.4-0.6 MPa.
Compared with the prior art, the invention has the beneficial effects that:
in the production process, the heating temperature in the blow molding machine is reduced through high-low-high segmented pressure maintaining and vacuum cavity treatment, and meanwhile, the yield of the vertical polypropylene soft infusion bag can be increased, the rejection rate is reduced, the light transmittance of the vertical polypropylene soft infusion bag is increased, and the quality of liquid medicine can be conveniently and directly observed.
Detailed Description
The present invention will be further described with reference to the following examples, but the present invention is not limited to these examples.
Example 1
The production process of the vertical polypropylene transfusion soft bag comprises the following preparation steps:
1) installing a bag blank mold on an injection molding machine, putting a medical grade polypropylene raw material into a charging barrel of the injection molding machine, starting the charging barrel to heat, heating to 210 ℃, converting the polypropylene raw material from a solid state into a molten state, injecting the plastic in the molten state into the mold, and maintaining the pressure in three sections: the first stage pressure is 60kPa, the pressure maintaining time is 0.5 second, the second stage pressure is 40kPa, the pressure maintaining time is 1 second, the third stage pressure is 58kPa, the pressure maintaining time is 1.5 seconds, the solid bag blank is formed after cooling in cooling water at the temperature of 35 ℃, and the bag blank is obtained after demoulding;
2) putting the bag blank into a vacuum cavity with the vacuum degree of 70kPa for 15s, then putting the bag blank into a blow molding machine, heating to 123 ℃, introducing compressed air for blow molding, and performing longitudinal stretching and transverse blow molding in a blow molding die by a stretching rod, and cooling by using circulating cooling water with the temperature of 25 ℃ and the pressure of 0.5MPa to obtain the vertical polypropylene transfusion soft bag.
Example 2
The production process of the vertical polypropylene transfusion soft bag comprises the following preparation steps:
1) installing a bag blank mold on an injection molding machine, putting a medical-grade polypropylene raw material into a charging barrel of the injection molding machine, starting the charging barrel to heat, converting the polypropylene raw material from a solid state to a molten state, injecting the plastic in the molten state into the mold, and maintaining the pressure in three sections: the first stage pressure is 50kPa, the pressure maintaining time is 0.5 second, the second stage pressure is 30kPa, the pressure maintaining time is 1 second, the third stage pressure is 55kPa, the pressure maintaining time is 2 seconds, the material is cooled in cooling water at the temperature of 40 ℃ to form a solid bag blank, and the solid bag blank is obtained by demoulding;
2) putting the bag blank into a vacuum cavity with the vacuum degree of 60kPa for 20s, then putting the bag blank into a blow molding machine, heating to 120 ℃, introducing compressed air for blow molding, and performing longitudinal stretching and transverse blow molding in a blow molding die by a stretching rod, and cooling by using circulating cooling water with the temperature of 28 ℃ and the pressure of 0.6MPa to obtain the vertical polypropylene transfusion soft bag.
Example 3
The production process of the vertical polypropylene transfusion soft bag comprises the following preparation steps:
1) installing a bag blank mold on an injection molding machine, putting a medical-grade polypropylene raw material into a charging barrel of the injection molding machine, starting the charging barrel to heat, heating to 240 ℃, converting the polypropylene raw material from a solid state into a molten state, injecting the plastic in the molten state into the mold, and maintaining the pressure in three sections: the first stage pressure is 65kPa, the pressure maintaining time is 1 second, the second stage pressure is 45kPa, the pressure maintaining time is 0.5 second, the third stage pressure is 60kPa, the pressure maintaining time is 1 second, the solid bag blank is formed after cooling in cooling water at the temperature of 35 ℃, and the mold is removed to obtain the bag blank;
2) putting the bag blank into a vacuum cavity with the vacuum degree of 80kPa for 10s, then putting the bag blank into a blow molding machine, heating to 125 ℃, introducing compressed air for blow molding, and performing longitudinal stretching and transverse blow molding in a blow molding die by a stretching rod, and cooling by using circulating cooling water with the temperature of 30 ℃ and the pressure of 0.4MPa to obtain the vertical polypropylene transfusion soft bag.
Example 4
1) Installing a bag blank mold on an injection molding machine, putting a medical grade polypropylene raw material into a charging barrel of the injection molding machine, starting the charging barrel to heat, heating to 210 ℃, converting the polypropylene raw material from a solid state into a molten state, injecting the plastic in the molten state into the mold, and maintaining the pressure in three sections: the first stage pressure is 65kPa, the pressure maintaining time is 1 second, the second stage pressure is 45kPa, the pressure maintaining time is 0.5 second, the third stage pressure is 60kPa, the pressure maintaining time is 1 second, the solid bag blank is formed after cooling in cooling water at the temperature of 35 ℃, and the mold is removed to obtain the bag blank;
2) putting the bag blank into a vacuum cavity with the vacuum degree of 70kPa for 15s, then putting the bag blank into a blow molding machine, heating to 123 ℃, introducing compressed air for blow molding, and performing longitudinal stretching and transverse blow molding in a blow molding die by a stretching rod, and cooling by using circulating cooling water with the temperature of 25 ℃ and the pressure of 0.5MPa to obtain the vertical polypropylene transfusion soft bag.
Example 5
The production process of the vertical polypropylene transfusion soft bag comprises the following preparation steps:
1) installing a bag blank mold on an injection molding machine, putting a medical grade polypropylene raw material into a charging barrel of the injection molding machine, starting the charging barrel to heat, heating to 210 ℃, converting the polypropylene raw material from a solid state into a molten state, injecting the plastic in the molten state into the mold, and maintaining the pressure in three sections: the first stage pressure is 50kPa, the pressure maintaining time is 0.5 second, the second stage pressure is 30kPa, the pressure maintaining time is 1 second, the third stage pressure is 55kPa, the pressure maintaining time is 2 seconds, the material is cooled in cooling water at the temperature of 35 ℃ to form a solid bag blank, and the solid bag blank is obtained by demoulding;
2) putting the bag blank into a vacuum cavity with the vacuum degree of 70kPa for 15s, then putting the bag blank into a blow molding machine, heating to 123 ℃, introducing compressed air for blow molding, and performing longitudinal stretching and transverse blow molding in a blow molding die by a stretching rod, and cooling by using circulating cooling water with the temperature of 25 ℃ and the pressure of 0.5MPa to obtain the vertical polypropylene transfusion soft bag.
Example 6
The difference from example 1 is: the green bag was placed in a vacuum chamber of 80kPa for 10 seconds, and the procedure was the same as in example 1.
Example 7
The difference from example 1 is: the green bag was placed in a vacuum chamber with a vacuum of 60kPa for 20s, and the procedure was as in example 1.
Example 8
The difference from example 1 is: in the step 2), the temperature is heated to 120 ℃, and the rest steps are the same as the example 1.
Example 9
The difference from example 1 is: in the step 2), the temperature is heated to 125 ℃, and the rest steps are the same as the example 1.
Comparative example 1
1) Installing a bag blank mold on an injection molding machine, putting a pharmaceutical grade polypropylene raw material into a charging barrel of the injection molding machine, starting the charging barrel to heat, converting the polypropylene raw material from a solid state to a molten state, injecting the molten plastic into the mold, maintaining the pressure for 3s at 60kPa, cooling in cooling water at 35 ℃ to form a solid bag blank, and demolding to obtain the bag blank;
the rest of the procedure was the same as in example 1.
Comparative example 2
1) Installing a bag blank mold on an injection molding machine, putting a medical grade polypropylene raw material into a charging barrel of the injection molding machine, starting the charging barrel to heat, heating to 210 ℃, converting the polypropylene raw material from a solid state into a molten state, injecting the plastic in the molten state into the mold, and maintaining the pressure in three sections: the first stage pressure is 60kPa, the pressure maintaining time is 0.5 second, the second stage pressure is 58kPa, the pressure maintaining time is 1.5 seconds, the third stage pressure is 40kPa, the pressure maintaining time is 1 second, the solid bag blank is formed after cooling in cooling water at the temperature of 35 ℃, and the bag blank is obtained after demoulding;
the rest of the procedure was the same as in example 1.
Comparative example 3
1) Installing a bag blank mold on an injection molding machine, putting a medical grade polypropylene raw material into a charging barrel of the injection molding machine, starting the charging barrel to heat, heating to 210 ℃, converting the polypropylene raw material from a solid state into a molten state, injecting the plastic in the molten state into the mold, and maintaining the pressure in three sections: the first stage pressure is 40kPa, the pressure maintaining time is 1 second, the second stage pressure is 58kPa, the pressure maintaining time is 1.5 seconds, the third stage pressure is 60kPa, the pressure maintaining time is 0.5 second, the material is cooled in cooling water at the temperature of 35 ℃ to form a solid bag blank, and the solid bag blank is obtained by demoulding;
the rest of the procedure was the same as in example 1.
Comparative example 4
1) Installing a bag blank mold on an injection molding machine, putting a medical grade polypropylene raw material into a charging barrel of the injection molding machine, starting the charging barrel to heat, heating to 210 ℃, converting the polypropylene raw material from a solid state into a molten state, injecting the plastic in the molten state into the mold, and maintaining the pressure in three sections: the first stage pressure is 60kPa, the pressure maintaining time is 0.5 second, the second stage pressure is 40kPa, the pressure maintaining time is 1 second, the material is cooled in cooling water at the temperature of 35 ℃ to form a solid bag blank, and the solid bag blank is obtained by demoulding;
the rest of the procedure was the same as in example 1.
Comparative example 5
The difference from example 1 is: the green bag was placed in a vacuum chamber of 90kPa for 5 seconds and the procedure was as in example 1.
Comparative example 6
The difference from example 1 is: the green bag was placed in a vacuum chamber with a vacuum of 50kPa for 30s, and the procedure was as in example 1.
Comparative example 7
The difference from example 1 is: in the step 2), the temperature is raised to 118 ℃, and the rest steps are the same as the example 1.
Comparative example 8
The difference from example 1 is: in the step 2), the temperature is heated to 130 ℃, and the rest steps are the same as the example 1.
Test example 1: the different production processes of the invention affect the yield, the rejection rate and the light transmittance of the upright polypropylene transfusion soft bag
A test is carried out in a certain pharmaceutical factory in Qinzhou, under the condition that the product meets YBB00142002-2015 guiding principles of test for compatibility of medicine packaging materials and medicines, the yield and the rejection rate of each test example in one week (same production time) are counted, and the yield and the rejection rate are recorded, wherein the rejection rate is the rejection rate generated by the corresponding yield.
The method comprises the steps of taking the smooth part of an infusion bag, cutting the smooth part into 5 slices of 0.9 cm x 4 cm, respectively putting the slices into an absorption tank along the vertical direction of incident light, filling water, taking the water as a blank, measuring light transmittance at the position of 450nm according to a spectrophotometry (appendix IV A of the second part of the pharmacopoeia of the people's republic of China, 2010 edition), taking 10 bags respectively, and averaging the results.
TABLE 1 influence of different pressure-maintaining procedures on yield, rejection rate and light transmittance of upright polypropylene infusion soft bags
| Different processes | Yield/(ten thousand bags/week) | Fraction of rejection rate/%) | Average light transmittance/%) |
| Example 1 | 3.35 | 0 | 95.1 |
| Example 4 | 3.23 | 0 | 93.2 |
| Example 5 | 3.14 | 0 | 94.9 |
| Comparative example 1 | 2.21 | 0.12 | 73.6 |
| Comparative example 2 | 2.60 | 0.18 | 79.5 |
| Comparative example 3 | 2.41 | 0.23 | 76.1 |
| Comparative example 4 | 2.46 | 0.15 | 75.8 |
TABLE 2 influence of different vacuum treatments on yield, rejection rate and light transmittance of upright polypropylene infusion soft bags
| Different processes | Yield/(ten thousand bags/week) | Fraction of rejection rate/%) | Average light transmittance/%) |
| Example 1 | 3.35 | 0 | 95.1 |
| Example 6 | 3.15 | 0 | 94.3 |
| Example 7 | 3.23 | 0 | 94.8 |
| Comparative example 5 | 2.31 | 0.09 | 75.7 |
| Comparative example 6 | 2.40 | 0.16 | 78.2 |
TABLE 3 influence of different heating temperatures on vertical polypropylene infusion soft bags yield, rejection rate and light transmittance in a blow molding machine
| Different processes | Yield/(ten thousand bags/week) | Fraction of rejection rate/%) | Average light transmittance/%) |
| Example 1 | 3.35 | 0 | 95.1 |
| Example 8 | 3.21 | 0 | 94.3 |
| Example 9 | 3.25 | 0 | 94.5 |
| Comparative example 7 | 2.18 | 0.35 | 75.3 |
| Comparative example 8 | 2.24 | 0.28 | 76.4 |
Claims (6)
1. The production process of the vertical polypropylene transfusion soft bag is characterized by comprising the following preparation steps:
1) installing a bag blank mold on an injection molding machine, putting a medical-grade polypropylene raw material into a charging barrel of the injection molding machine, starting the charging barrel to heat, heating to 180-240 ℃, converting the polypropylene raw material from a solid state to a molten state, injecting the molten plastic into the mold, and maintaining the pressure in three sections: the first stage pressure is 50-65kPa, the pressure maintaining time is 0.5-1 second, the second stage pressure is 30-45kPa, the pressure maintaining time is 0.5-1 second, the third stage pressure is 55-60kPa, the pressure maintaining time is 1-2 seconds, the material becomes a solid bag blank after cooling, and the bag blank is obtained after demoulding;
2) putting the bag blank into a vacuum cavity with the vacuum degree of 60-80kPa for 10-20s, then putting the bag blank into a blow molding machine, heating to 120-125 ℃, introducing compressed air for blow molding, longitudinally stretching and transversely blow molding through a stretching rod in a blow molding die, and cooling to obtain the vertical polypropylene transfusion soft bag.
2. The upright polypropylene infusion soft bag production process according to claim 1, wherein: in the step 1), pressure maintaining is carried out in three sections: the first stage pressure was 60kPa, the dwell time was 0.5 seconds, the second stage pressure was 40kPa, the dwell time was 1 second, the third stage pressure was 58kPa, and the dwell time was 1.5 seconds.
3. The upright polypropylene infusion soft bag production process according to claim 1, wherein: in the step 1), the temperature of cooling water is 35-40 ℃.
4. The upright polypropylene infusion soft bag production process according to claim 1, wherein: in the step 2), the bag blank is put into a vacuum cavity with the vacuum degree of 70kPa for 15 s.
5. The upright polypropylene infusion soft bag production process according to claim 1, wherein: in step 2), heating to 123 ℃.
6. The upright polypropylene infusion soft bag production process according to claim 1, wherein: in the step 2), circulating cooling water with the temperature of 25-30 ℃ and the pressure of 0.4-0.6MPa is used for cooling.
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| CN101716124B (en) * | 2009-12-17 | 2014-04-16 | 安徽丰原药业股份有限公司 | Jointless transfusion soft bag and preparation method thereof |
| CN101786335A (en) * | 2010-01-26 | 2010-07-28 | 新疆华世丹药业股份有限公司 | Upright flexible bag infusion bottle preparation method |
| CN104419065A (en) * | 2013-09-03 | 2015-03-18 | 辽宁九洲龙跃药业有限公司 | Polypropylene-blended soft infusion bag and preparation method thereof |
| JP6169633B2 (en) * | 2015-03-04 | 2017-07-26 | ファナック株式会社 | Pressure control device for injection molding machine |
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