阅读说明：本技术 一种骨条生产工艺 (Bone strip production process ) 是由 龚立锋 于 2019-08-28 设计创作，主要内容包括：本发明提供一种骨条生产工艺,包括如下步骤：步骤S1、按照如下重量百分比称取各原料组分组成原材料：非线性低密度聚乙烯42.84％-46.68％,线性低密度聚乙烯13.33％-14.29％,一类乙烯辛烯共聚物13.33％-14.29％,二类乙烯辛烯共聚物13.33％-14.29％,低压高密度聚乙烯13.33％-14.29％；步骤S2、将所述原材料置于搅拌机中,匀速搅拌,使所述原材料混合均匀,得到混合物；步骤S3、用自动吸料机将所述混合物吸入挤出机中,在挤出机中进行加热并挤出形成线状熔体；步骤S4、将线状熔体在水槽中进行冷却定型,生成骨条初型；步骤S5、将所述骨条初型进行还原,生成骨条,并用合链机将骨条扣合。本发明对原材料进行改良,提高了骨条质量,降低了废品率和不合格率。(The invention provides a bone strip production process, which comprises the following steps: step S1, weighing the raw materials according to the following weight percentage: 42.84-46.68% of nonlinear low-density polyethylene, 13.33-14.29% of linear low-density polyethylene, 13.33-14.29% of one-class ethylene-octene copolymer, 13.33-14.29% of two-class ethylene-octene copolymer and 13.33-14.29% of low-pressure high-density polyethylene; step S2, placing the raw materials in a stirrer, and stirring at a constant speed to uniformly mix the raw materials to obtain a mixture; step S3, sucking the mixture into an extruder by using an automatic suction machine, heating and extruding the mixture in the extruder to form a linear melt; step S4, cooling and shaping the linear melt in a water tank to generate a bone strip primary shape; and step S5, restoring the bone strip primary form to generate a bone strip, and buckling the bone strip by using a chain combining machine. The invention improves the raw materials, improves the quality of the bone strips, and reduces the rejection rate and the reject ratio.)

1. The production process of the bone strip is characterized by comprising the following steps:

step S1, weighing the raw materials according to the following weight percentage: 42.84-46.68% of nonlinear low-density polyethylene, 13.33-14.29% of linear low-density polyethylene, 13.33-14.29% of one-class ethylene-octene copolymer, 13.33-14.29% of two-class ethylene-octene copolymer and 13.33-14.29% of low-pressure high-density polyethylene;

step S2, placing the raw materials in a stirrer, and stirring at a constant speed to uniformly mix the raw materials to obtain a mixture;

step S3, sucking the mixture into an extruder by using an automatic suction machine, heating and extruding the mixture in the extruder to form a linear melt;

step S4, cooling and shaping the linear melt in a water tank to generate a bone strip primary shape;

and step S5, restoring the bone strip primary form to generate a bone strip, and buckling the bone strip by using a chain combining machine.

2. The bone strip production process of claim 1, wherein the step S2 includes:

step S21, judging whether the moisture content of the raw material is lower than the preset minimum moisture content, if so, executing step S22, and if not, executing step S23;

step S22, placing the raw materials in a stirrer, and stirring at a constant speed for 25-30 minutes to uniformly mix the raw materials to obtain a mixture;

and step S23, placing the raw materials in a stirrer, and uniformly stirring for 45-60 minutes at a constant speed of 60-80 ℃ to uniformly mix the mixture to obtain a mixture.

3. The bone strip production process of claim 2, wherein the step S5 includes:

step S51, judging whether the outdoor temperature is lower than 20 ℃, if not, executing step S52; if yes, go to step S53;

step S52, placing the bone strip prototype indoors for 1 hour to generate bone strips, and fastening the bone strips by using a chain combining machine;

and step S53, placing the bone strip prototype in a sealed space with the temperature of more than 20 ℃ for more than 3 hours to generate bone strips, and fastening the bone strips by using a chain combining machine.

4. The bone strip production process according to claim 3, wherein the temperature in the extruder in the step S3 is 150 ℃ to 205 ℃, the temperature is divided into 6 temperature zones, the temperature in the first zone is 150 ℃, the temperature in the second zone is 150 ℃ to 161 ℃, the temperature in the third zone is 161 ℃ to 172 ℃, the temperature in the fourth zone is 172 ℃ to 183 ℃, the temperature in the fifth zone is 183 ℃ to 194 ℃, and the temperature in the sixth zone is 194 ℃ to 205 ℃.

5. The bone strip production process of claim 1, wherein the nonlinear low density polyethylene has a density of 0.921g/m³The linear low density polyethylene has a density of 0.918g/m³The density of the ethylene-octene copolymer is 0.94g/m³The density of the ethylene-octene copolymer of the second type is 0.936g/m³The density of the low-pressure high-density polyethylene is 0.961g/m³。

6. The bone strip production process of claim 1, wherein the melt index of the nonlinear low density polyethylene is 5g/10min, the melt index of the linear low density polyethylene is 2g/10min, the melt index of the first ethylene octene copolymer is 0.9g/10min, the melt index of the second ethylene octene copolymer is 4.5g/10min, and the melt index of the low pressure high density polyethylene is 0.7g/10 min.

7. The bone strip production process of claim 1, wherein the extruder in the step S3 extrudes the thread-like melt at a speed of 45-50 m/min.

8. The process for producing bone strips according to claim 1, wherein the temperature of the cooling water in the water tank in the step S4 is 28 to 30 ℃.

9. The bone strip production process of claim 1, wherein the raw material of step S1 further comprises 2% -2.5% color masterbatch for making the bone strip appear different colors.

10. The bone strip production process of claim 1, wherein the capacity of the blender is greater than the total weight of the raw materials.

Technical Field

The invention relates to the technical field of plastic production and manufacturing, in particular to a bone strip production process.

Background

The self-sealing bag is applied to various fields, is used for sealing objects, prevents the sealed objects from being subjected to dust and moisture, is sealed by common bone strips at a sealing part, and ensures the sealing reliability.

The components of the existing bone strip raw material are non-linear low-density polyethylene with a melt index of 5g/10min, linear low-density polyethylene with a melt index of 2g/10min and ethylene octene copolymer with a melt index of 5g/10min, and the generated bone strip has the following defects: (1) the bone strips are soft, and the test value of the transverse tension value cannot reach the standard of a client; (2) the sealing performance does not reach the standard, and occasionally, the condition of water leakage or water seepage of bone strips occurs; (3) the toughness of the joint part of the bone strips is not good enough, and the self-sealing bag is easy to tear when being thermally jointed in the manufacturing process, so that the self-sealing bag is unusable; (4) the bone strips have more defects, high rejection rate and defective product rate and low qualified rate of finished products.

Therefore, a bone strip production process is urgently needed to be sought, and the technical problems of insufficient bone strip hardness, poor ductility, poor sealing performance, low qualification rate and the like in the prior art are solved.

Disclosure of Invention

The invention provides a bone strip production process aiming at the technical problems of insufficient bone strip hardness, poor ductility, poor sealing property, low qualification rate and the like in the prior art.

The technical scheme provided by the invention for the technical problem is as follows: a bone strip production process comprises the following steps: step S1, weighing the raw materials according to the following weight percentage: 42.84-46.68% of nonlinear low-density polyethylene, 13.33-14.29% of linear low-density polyethylene, 13.33-14.29% of one-class ethylene-octene copolymer, 13.33-14.29% of two-class ethylene-octene copolymer and 13.33-14.29% of low-pressure high-density polyethylene; step S2, placing the raw materials in a stirrer, and stirring at a constant speed to uniformly mix the raw materials to obtain a mixture; step S3, sucking the mixture into an extruder by using an automatic suction machine, heating and extruding the mixture in the extruder to form a linear melt; step S4, cooling and shaping the linear melt in a water tank to generate a bone strip primary shape; and step S5, restoring the bone strip primary form to generate a bone strip, and buckling the bone strip by using a chain combining machine.

In the above-mentioned bone strip production process of the present invention, the step S2 includes: step S21, judging whether the moisture content of the raw material is lower than the preset minimum moisture content, if so, executing step S22, and if not, executing step S23; step S22, placing the raw materials in a stirrer, and stirring at a constant speed for 25-30 minutes to uniformly mix the raw materials to obtain a mixture; and step S23, placing the raw materials in a stirrer, and uniformly stirring for 45-60 minutes at a constant speed of 60-80 ℃ to uniformly mix the mixture to obtain a mixture.

In the above-mentioned bone strip production process of the present invention, the step S5 includes: step S51, judging whether the outdoor temperature is lower than 20 ℃, if not, executing step S52; if yes, go to step S53; step S52, placing the bone strip prototype indoors for 1 hour to generate bone strips, and fastening the bone strips by using a chain combining machine; and step S53, placing the bone strip prototype in a sealed space with the temperature of more than 20 ℃ for more than 3 hours to generate bone strips, and fastening the bone strips by using a chain combining machine.

In the above-mentioned production process of the bone strip of the present invention, in the step S3, the temperature in the extruder is 150 ℃ to 205 ℃, the temperature is divided into 6 temperature zones, the temperature in the first zone is 150 ℃, the temperature in the second zone is 150 ℃ to 161 ℃, the temperature in the third zone is 161 ℃ to 172 ℃, the temperature in the fourth zone is 172 ℃ to 183 ℃, the temperature in the fifth zone is 183 ℃ to 194 ℃, and the temperature in the sixth zone is 194 ℃ to 205 ℃.

In the above-mentioned bone strip production process of the present invention, the density of the non-linear low density polyethylene is 0.921g/m³The linear low density polyethylene has a density of 0.918g/m³The density of the ethylene-octene copolymer is 0.94g/m³The density of the ethylene-octene copolymer of the second type is 0.936g/m³The density of the low-pressure high-density polyethylene is 0.961g/m³。

In the production process of the bone strip, the melt index of the nonlinear low-density polyethylene is 5g/10min, the melt index of the linear low-density polyethylene is 2g/10min, the melt index of the first-class ethylene-octene copolymer is 0.9g/10min, the melt index of the second-class ethylene-octene copolymer is 4.5g/10min, and the melt index of the low-pressure high-density polyethylene is 0.7g/10 min.

In the above-mentioned production process of the bone strip of the present invention, the speed of extruding the thread-like melt by the extruder in the step S3 is 45 to 50 m/min.

In the above-mentioned bone strip production process of the present invention, the temperature of the cooling water in the water tank of step S4 is 28 to 30 ℃.

In the above-mentioned bone strip production process of the present invention, the raw material in step S1 may further include 2% to 2.5% of color masterbatch for making the bone strip exhibit different colors.

In the above-mentioned bone strip production process of the present invention, the capacity of the mixer is greater than the total weight of the raw materials.

The technical scheme provided by the invention has the beneficial effects that: aiming at the technical problems of insufficient bone strip hardness, poor ductility, poor sealing performance, low qualification rate and the like in the prior art, the invention provides a bone strip production process, which hardens bone strips by improving a bone strip formula, increases the transverse and longitudinal tension values of the bone strips and achieves the purpose of safe use; after the bone strips are broken, crisp sound can be generated to remind the user of paying attention; the sealing performance of the bone strip is enhanced after the formula is improved, and no water leakage or water seepage is realized; furthermore, the toughness of the bone strips is enhanced, so that the bone strips are not easy to break when being bonded with the film of the self-sealing bag, the rejection rate and the rejection rate of the bone strips are reduced, and the quality of the bone strips and the film after being bonded at high temperature is improved.

Drawings

FIG. 1 is a flow chart of a bone strip production process according to an embodiment of the present invention;

FIG. 2 is a flowchart of a step S2 according to an embodiment of the present invention;

FIG. 3 is a flowchart of a step S5 according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating an effect of a bone strip produced by a bone strip production process according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a bone strip produced by the bone strip production process flow provided by the embodiment of the invention.

Detailed Description

In order to solve the technical problems of insufficient bone strip hardness, poor sealing property, low qualification rate and the like in the prior art, the invention aims to provide a bone strip production process, which has the core idea that: the bone strip is hardened by improving the formula of the bone strip, the transverse and longitudinal tension values of the bone strip are increased, and the purpose of safe use is achieved; after the bone strips are broken, crisp sound can be generated to remind the user of paying attention; the sealing performance of the bone strip is enhanced after the formula is improved, and no water leakage or water seepage is realized; furthermore, the toughness of the bone strips is enhanced, so that the bone strips are not easy to break when being bonded with the film of the self-sealing bag, the rejection rate and the rejection rate of the bone strips are reduced, and the quality of the bone strips and the film after being bonded at high temperature is improved.

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.